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  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Physics Letters B 294 (1992), S. 466-478 
    ISSN: 0370-2693
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Physics Letters B 317 (1993), S. 474-484 
    ISSN: 0370-2693
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 3
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    Elsevier
    In: SoftwareX
    Publication Date: 2018-07-01
    Description: Publication date: January–June 2018 Source: SoftwareX, Volume 7 Author(s): Ronald R. Gutierrez, Jose A. Mallma, Francisco Núñez-González, Oscar Link, Jorge D. Abad Bedforms-ATM (Bed forms analysis toolkit for multiscale modeling) is a software designed to hierarchize and quantify the dimensionality of natural bed forms fields. It comprises four modular applications, namely: (1) wavelet analysis, (2) Hovmöller analysis, (3) multiscale discrimination, and (4) three-dimensionality analysis. Bedforms-ATM also provides insights on bed form systems dynamics and their interrelationship with the surrounding hydrodynamic characteristics. The software structure encourages its expandability via the collaboration from the community of users. Both fluvial and synthetic bed form data accompany Bedforms-ATM.
    Electronic ISSN: 2352-7110
    Topics: Computer Science
    Published by Elsevier
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  • 4
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    Elsevier
    Publication Date: 2018-07-01
    Description: Publication date: 1 September 2018 Source: Solar Energy, Volume 171 Author(s): Guoqing Liao, Jialong Duan, Yuanyuan Zhao, Qunwei Tang Perovskite-structured cesium lead bromide (CsPbBr 3 ) halide is a rising light harvester for perovskite solar cell applications due to its high absorption coefficient and stability upon heat and humidity attacks. However, the serious electron-hole recombination arising from large interfacial energy differences has markedly limited charge extraction for enhanced photovoltaic performances. Herein, we systematically study fast charge extraction at TiO 2 /CsPbBr 3 and CsPbBr 3 /carbon interfaces by setting intermediate energy levels with carbon quantum dots and red phosphorus quantum dots, respectively. The interfacial radiative or trap-dominant recombination can be significantly suppressed owing to the boosted charge transfer ability as well as the passivation effect by incorporating the carbon quantum dots and red phosphorus quantum dots into solar cells. Finally, the optimal perovskite solar cell device achieves a maximized power conversion efficiency of 8.20% under one sun illumination in comparison with 6.37% for quantum dots-free solar cell. Moreover, the efficiency is reduced by only 3% upon persistent attack with 80% relative humidity over 1000 h, suggesting a good environmental tolerance to boost the commercialization. Graphical abstract
    Print ISSN: 0038-092X
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by Elsevier
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  • 5
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    Elsevier
    Publication Date: 2018-07-01
    Description: Publication date: 1 September 2018 Source: Solar Energy, Volume 171 Author(s): Xiaofeng Shi, Brendan Acord, Peng Wang High temporal resolution modeling of solar irradiance is of great interest to stakeholders in the power sector and helps understand the impact of additional solar photovoltaic (PV) power on the grid. Recent developments in solar irradiance downscaling modeling (SID), such as the Bright model, have facilitated the generation of synthetic minutely solar irradiance and shown promising results in U.K. and the U.S. and Australia. However, in the presence of heavy airborne pollution, the SID performances may be hindered by a data shortage of high-temporal-resolution aerosol optical depth (AOD). In this paper, we present a novel approach to incorporate pollution effects into a solar irradiance downscaling model, i.e. the Bright model, by utilizing the local ground-measured pollution data that is publicly available. The proposed framework is evaluated through a case study in Beijing, China, and shows an improved estimation of high-frequency solar irradiance for areas experiencing heavy pollution.
    Print ISSN: 0038-092X
    Topics: Energy, Environment Protection, Nuclear Power Engineering
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  • 6
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    Elsevier
    Publication Date: 2018-07-01
    Description: Publication date: 1 September 2018 Source: Solar Energy, Volume 171 Author(s): V. Encinas-Sánchez, M.T. de Miguel, G. García-Martín, M.I. Lasanta, F.J. Pérez The corrosion behaviour of a commercial HR3C steel in a molten eutectic ternary Li 2 CO 3 -Na 2 CO 3 -K 2 CO 3 mixture was studied by isothermal immersion tests at 700 °C and 800 °C for 2000 h. It was found that in both cases the corrosion products were arranged in a multilayer structure, with LiFeO 2 , LiCrO 2 , NiO and FeCr 2 O 4 as the main compounds. Similar results to those obtained at 700 °C were reached in the tests performed at 800 °C but 1000 h earlier, which seems to indicate that the process was accelerated at higher temperature. Furthermore, regarding the superficial crystalline phase formed and according to the XRD and SEM examinations, it was found that on increasing the test temperature, a continuous transformation occurred from the rhombohedral to the cubic phase of the LiFeO 2 oxide layer. This transformation took place at both temperatures when the tests proceed and it was also accelerated by increasing the temperature from 700 to 800 °C. Thus, the process seems to be slower at 700 °C, which complicates the use of HR3C at 800 °C in the molten eutectic ternary Li 2 CO 3 -Na 2 CO 3 -K 2 CO 3 salt mixture. These results suggest that the use of protective coatings should be assessed and that this material should be tested at 700 °C under more aggressive conditions, such as flowing salt, in future studies.
    Print ISSN: 0038-092X
    Topics: Energy, Environment Protection, Nuclear Power Engineering
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  • 7
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    Elsevier
    Publication Date: 2018-07-01
    Description: Publication date: 1 September 2018 Source: Solar Energy, Volume 171 Author(s): Madhumita Das, Ratan Mandal To operate centrifugal pump against higher discharge pressure and to achieve specific speed for delivering the water, the level of irradiance required is quite high. Therefore, by knowing the operating pressure this problem may be minimized by using energy storage devices like battery or supercapacitor operated in parallel with the SPV module. Here is the need to select a proper configuration of solar PV water pumping system (SPVWPS) using energy storage devices for the economic application. Therefore, a new approach is made towards studying different configurations of 7SPVWPS with battery and supercapacitors under varying discharge pressure and evaluate the performance parameters. Four different configurations of SPVWPS using centrifugal pump are considered, namely, directly coupled, with battery, with the supercapacitors and with a battery-supercapacitor hybrid, to determine the optimum configuration for higher system performance. The experiment have been carried out on a small scale SPVWPS with 2 m and 3 m dynamic head of the pump on sunny days at Haldia, India. The comparison of the performance for the different configurations have been reported. The study reveals that the supercapacitor based configuration give highest instantaneous efficiency. The centrifugal pump powered by SPVWPS using battery delivers a maximum of 2964 L per day for 2 m dynamic head whereas for 3 m dynamic head SPVWPS using supercapacitor delivers a maximum of 1826 L per day. An economic comparison is also done for the different topologies.
    Print ISSN: 0038-092X
    Topics: Energy, Environment Protection, Nuclear Power Engineering
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  • 8
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    Elsevier
    Publication Date: 2018-07-01
    Description: Publication date: 1 September 2018 Source: Solar Energy, Volume 171 Author(s): Lisa Willwerth, Jan Fabian Feldhoff, Dirk Krüger, Lothar Keller, Martin Eickhoff, Joachim Krüger, Yuvaraj Pandian, Jörg Tiedemann, Manuel Succo, Abdallah Khenissi TSE1 is the first solar thermal power plant operating in Southeast Asia. It was planned by Solarlite GmbH with support of Tiede- & Niemann GmbH, both German based. It is the first power plant with direct steam generation (DSG) concept and superheating in parabolic troughs. The solar field has a nominal power of 19 MW th driving a 5 MW el turbine by superheated steam at 30 bar and 330 °C. During 2010/2011 Solarlite built the solar field, while the later owner and operator Thai Solar Energy (TSE) from Bangkok built the power block, in Kanchanaburi, Thailand. TSE1 is being operated by TSE since January 2012 (Krüger et al., 2012). This publication is based on a study within the KanDis project, funded by the German Federal Ministry for Economic Affairs and Energy, in which an extensive database of records of almost 500 sensors installed in the power plant (solar field and power block) has been investigated. The data have been provided by Solarlite with a time resolution of about 1 min. Within the KanDis project, a stable operation could be demonstrated (Khenissi et al., 2015; Krüger et al., 2016). Even under the fluctuating irradiance conditions in the rainy season of Thailand, the turbine could be operated well and generate electricity. Evaluation of the operation data has helped to learn more about DSG behaviour. The TSE1 layout and the implemented control strategies were evaluated and strategies for improvement of TSE1 are suggested within this paper. From the experiences with the TSE1 power plant, conclusions could be drawn to improve the layout and control of future DSG plants.
    Print ISSN: 0038-092X
    Topics: Energy, Environment Protection, Nuclear Power Engineering
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  • 9
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    Elsevier
    Publication Date: 2018-07-01
    Description: Publication date: Available online 29 June 2018 Source: Solid Earth Sciences Author(s): Roghieh Doroozi, Carmela Vaccaro, Fariborz Masoudi, Riccardo Petrini The Triassic alkaline basaltic rocks (TABR) of North Kamarbon are located in Central Alborz, which is regarded as the northern part of the Alpine-Himalayan orogenic belt. Fractional crystallization does not appear as a major process in the genesis of TABR while different degree of partial melting may be regarded as the main process, based on petrography and geochemistry studies. The geochemical characteristics of TABR are in conflict with a substantial involvement of continental crust or crustal contamination. High (La/Yb) N and (Dy/Yb) N ratios, along with other geochemical features, in the TABR magma, suggest an asthenospheric origin, with low degree of partial melting of a garnet-bearing mantle sources. Enrichment patterns of LILE (Ba, Sr and Th), HFSE (Nb, Ta and Zr) and P, and depletion at HREE (Yb, Lu) are similar to what observed for OIB or intraplate alkaline magmatic rocks. The Sr and Nd isotopic ratios range from 0.70448 to 0.70522 and from 0.51269 to 0.51280, respectively, suggesting time-integrated slightly depleted magma sources. The data indicate that the evolution of TABR could be related to the rifting basin, in Late Triassic, which caused their development by upwelling and decompressional melting of an asthenospheric mantle, without a major involvement of subcontinental lithospheric mantle or crustal contamination.
    Electronic ISSN: 2451-912X
    Topics: Geosciences
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  • 10
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    Elsevier
    Publication Date: 2018-07-02
    Description: Publication date: October 2018 Source: Transportation Research Part A: Policy and Practice, Volume 116 Author(s): Kum Fai Yuen, Vinh V. Thai, Yiik Diew Wong Anchoring on the theory of planned behaviour (TPB), the current paper investigates the moderating influences of shippers’ corporate social responsibility (CSR) beliefs on their satisfaction and behaviour towards shipping firms’ involvement in CSR. It also analyses organisational and environmental factors that shape shippers’ CSR beliefs. Survey data were obtained from 276 shippers with business offices located in Singapore, and analysed using multi-sampling approach and linear regression modelling. The results show that shippers with strong CSR beliefs derive greater satisfaction, and exhibit stronger behavioural intentions towards shipping firms’ involvement in CSR. In addition, shippers’ CSR beliefs are influenced by shippers’ organisational characteristics such as (1) firm’s age, (2) firm’s size, (3) degree of internationalisation, (4) types of products shipped, and environmental factors such as (5) perceived environmental and social threats, (6) perceived level of competition, and (7) level of CSR practices in headquarters. The results contribute to TPB research application in both B2C and B2B contexts, and motivate changes to the current marketing and communication practices of shipping firms.
    Print ISSN: 0965-8564
    Electronic ISSN: 1879-2375
    Topics: Architecture, Civil Engineering, Surveying
    Published by Elsevier
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  • 11
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    Elsevier
    Publication Date: 2018-07-02
    Description: Publication date: Available online 30 June 2018 Source: Weather and Climate Extremes Author(s): Mojtaba Khanian, Nadine Marshall, Kianoosh Zakerhaghighi, Marziyeh Salimi, Asadollah Naghdi When the social, economic, or ecological conditions under which socio-ecological systems are expected to adapt become untenable, a system may transform into a fundamentally new system. Within agricultural systems, farmers have the option of significantly transforming their practices, or migrating elsewhere in the search for a better lifestyle (and exiting the agricultural socio-ecological system). However, if governments, communities and industry leaders are to provide climate change impact support to agricultural regions, then it becomes critical to predict the conditions under which farmers, households and communities will choose to either transform their farming or migrate. We hypothesize that those conditions are likely to reflect environmental, economic and social conditions within a region, where some communities and/or some farmers may respond differently depending on their environmental, economic and social factors. Here, we examine how the perception of farmers to transformational change is influenced by social, environmental and economic factors in six villages within the Famenin County of western Iran, which have experienced a notable recent decrease in groundwater levels, an increase in temperature due to reduced rainfall and no support from government. Results show that environmental, economic and social factors were all important influences on the social transformations that were occurring within each village and across the region. In sum, environmental flexibility and local corporation eased the transformation process. Place attachment and social capital were critical to facilitate transformation during all parts of the transformation process. These results are discussed as two separate scenarios.
    Electronic ISSN: 2212-0947
    Topics: Geography , Geosciences
    Published by Elsevier
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  • 12
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    Elsevier
    Publication Date: 2018-01-28
    Description: Publication date: February 2018 Source: Journal of Transport Geography, Volume 67 Author(s): Ting Zuo, Heng Wei, Andrew Rohne To more effectively expand transit service coverage through promoting bicycling, a practical approach is presented in the paper for estimating the coverage of transit service accessible by non-motorized modes (i.e. walking and bicycling). The non-motorized accessibility to transit is determined by the connectivity and facilities of non-motorized network. Using the data from 2009 to 2010 GPS-based Household Travel Survey in the Cincinnati metropolitan area, the study examines distance thresholds of such non-motorized transit access trips and identifies the spatial boundary and geographic area of transit catchment areas in the Geographic Information System environment. Results suggest that bicycle enables people to access the transit service. The bicycle-transit catchment area is estimated as 1.7 and 2.3 times of the size of pedestrian-transit catchment area at home and activity ends respectively. As a result, more households and employment can reach the transit service via bicycling than walking (52.45% vs. 36.72% for households and 47.82%. vs. 33.07% for employment in the study area). Suburbs, where near half of population and employment situate, are comparatively underserved. Especially, only 27.14% % of the disadvantaged population in suburbs, can access transit by walking, but the percent is increased to 50.96% if using a bicycle. Besides the distance threshold, the non-motorized accessibility to transit is found to be a significant factor determining transit catchment areas. The transit service area can be expanded if a safer and more comfortable bicycling environment is available. Those findings can also be further used as references in the transit-oriented development planning.
    Print ISSN: 0966-6923
    Electronic ISSN: 1873-1236
    Topics: Architecture, Civil Engineering, Surveying
    Published by Elsevier
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  • 13
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    Elsevier
    Publication Date: 2018-01-28
    Description: Publication date: January 2018 Source: Journal of Transport Geography, Volume 66 Author(s): Kyoungok Kim Public bicycle systems are widely spread across many cities worldwide. ‘Tashu’, a public bicycle sharing system in Daejeon, was installed in 2009 and it is one of the well-established public bike-sharing systems in South Korea. Previous studies in the literature found that in general, bicycling is affected by weather conditions and temporal characteristics. However, the degrees of impacts or the signs of effects may be different depending on the stations. Therefore, this study investigated the different effects of weather conditions and temporal characteristics according to the characteristics of the stations at the station level analysis in addition to the system level analysis. For the cost-effective station level analysis, clustering analysis was utilized to find out the groups of the stations with the similar properties. Moreover, temperature humidity index (THI) and the indicator variable of heatwaves were introduced to consider the interaction between temperature and humidity and measure the influence of high temperature, which has been rarely considered. In the system level analysis, the results showed that the selected factors have the different influence over the different time periods within a day. Especially, scorching heat and non-working days differently affect the demand for public bikes by hours. Also, it was observed that high temperature over 30 °C reduces the bicycle usage, which revealed the necessity of taking into account not only severe colds but also heatwaves in the prediction of the demand. By clustering analysis, the stations were partitioned into the three clusters. One cluster shows the strong peak in the morning while two others have peaks in the evening. The effects of weather conditions and non-working days on the demand for public bicycles were different depending on the clusters, which seemed to be related to the main purposes of bike usage in the clusters.
    Print ISSN: 0966-6923
    Electronic ISSN: 1873-1236
    Topics: Architecture, Civil Engineering, Surveying
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  • 14
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    Elsevier
    In: Lancet
    Publication Date: 2018-01-28
    Description: Publication date: Available online 26 January 2018 Source: The Lancet Author(s): Sophia Varadkar
    Print ISSN: 0140-6736
    Electronic ISSN: 1474-547X
    Topics: Medicine
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  • 15
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    Elsevier
    Publication Date: 2018-02-22
    Description: Publication date: November 2018 Source: Energy Reports, Volume 4 Author(s): A. Ben Othman, K. Belkilani, M. Besbes A very important factor in the assessment of solar potential for the installation of photovoltaic plants is the availability of global irradiation data measurements. Such data must be collected over a period of time longer than 11 years and must be accurate. In some countries, it is difficult to have databases of these measures. To overcome this problem, we propose, the use of numerical models to estimate the monthly, seasonally and annually solar energy irradiation (global diffuse and direct solar radiation), especially on tilted surface. The results obtained from the numerical models are compared to the data collected from three regions on Tunisia: Bizerte (in the north), Nabeul (near to the north east) and Djerba (in the south). The actual measurements taken from the meteorological stations and the measurements generated by the numerical models are very close. After the validation of the numerical models, we tried to calculate the best tilt angle for each period of the year to position a photovoltaic panel, in a given region, to reach maximum energy recovery. The practical validation, of the optimal tilt angle search and the adequate period, was conducted at the Research and Technology Center of Energy of Borj Cedria. The obtained results are satisfactory and prove the reliability of the constructed numerical models.
    Print ISSN: 2352-4847
    Topics: Energy, Environment Protection, Nuclear Power Engineering
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  • 16
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    Elsevier
    Publication Date: 2018-02-18
    Description: Publication date: May 2018 Source: Energy Policy, Volume 116 Author(s): Bo Wang, Xiaomeng Wang, Dongxue Guo, Bin Zhang, Zhaohua Wang At present, China is paying more and more attention to sustainable development. Saving energy is an important guarantee for sustainable development. At the same time, many studies have found that changing people's energy consumption behaviours can contribute to solving the high energy consumption problem. Thus, this research chooses the urban residents in China as its object, and studies the factors influencing residents’ habitual energy-saving behaviours. We establish a comprehensive theoretical model suitable for this study based on TPB and NAM model. Through on-the-spot investigation, data collection, and model establishment, we find that the daily energy-saving behaviours of urban residents in China are mostly motivated by “altruism”. In addition, the external factors (social norms and policy environment) have a significant impact on residents’ daily energy-saving behaviour. Based on this, we put forward some specific policy suggestions from three aspects: policy effectiveness, information behind the big data and the publicity by the Internet.
    Print ISSN: 0301-4215
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Political Science
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  • 17
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    Elsevier
    Publication Date: 2018-02-18
    Description: Publication date: May 2018 Source: Energy Policy, Volume 116 Author(s): Ji-Bum Chung, Eun-Sung Kim Since President Moon Jae-in took office in May 2017, South Korea has been embroiled in a major social controversy about energy transition. The president's pledge to transition toward renewable energy represented a dramatic change in Korean energy policy, which has been focused on nuclear and coal-fired plant expansion policies since the 1970s. This study examines public perception of energy, with focus on the relationship between nuclear power and climate change as well as party preferences, based on a nationally representative survey of Korea. The survey data shows that the risk-risk tradeoff strategy, reframing nuclear power generation as a way to mitigate the risks of climate change, seems to be ineffective in Korea. Furthermore, nuclear power represents the values of the elderly, materialists, developmentalists, and conservative political parties. These results suggest that Korean energy policy is a very political issue rather than a strictly scientific or economic one. Therefore, this issue should be deliberated through a democratic process.
    Print ISSN: 0301-4215
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Political Science
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  • 18
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    Elsevier
    Publication Date: 2018-02-18
    Description: Publication date: May 2018 Source: Energy Policy, Volume 116 Author(s): Phoebe Pearce, Raphael Slade Since 2010, over 700,000 small-scale solar photovoltaic (PV) systems have been installed by households in Great Britain and registered under the feed-in tariff (FiT) scheme. This paper introduces a new agent-based model which simulates this adoption by considering decision-making of individual households based on household income, social network, total capital cost of the PV system, and the payback period of the investment, where the final factor takes into account the economic effect of FiTs. After calibration using Approximate Bayesian Computation, the model successfully simulates observed cumulative and average capacity installed over the period 2010–2016 using historically accurate FiTs; setting different tariffs allows investigation of alternative policy scenarios. Model results show that using simple cost control measures, more installation by October 2016 could have been achieved at lower subsidy cost. The total cost of supporting capacity installed during the period 2010–2016, totalling 2.4 GW, is predicted to be £14 billion, and costs to consumers significantly exceed predictions. The model is further used to project capacity installed up to 2022 for several PV cost, electricity price, and FiT policy scenarios, showing that current tariffs are too low to significantly impact adoption, and falling PV costs are the most important driver of installation.
    Print ISSN: 0301-4215
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Political Science
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  • 19
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    Elsevier
    Publication Date: 2018-02-18
    Description: Publication date: May 2018 Source: Energy Policy, Volume 116 Author(s): Lefkothea Papada, Dimitris Kaliampakos So far, the lack of a common, effective way of measuring energy poverty has been detected as a major weakness in handling the energy poverty problem. One of the main causes has been the complexity of modeling the “required energy consumption” of households, as demanded by the official 10% indicator, and its replacement in calculations by the “actual energy consumption”, which, as is well known, underestimates the real needs of households. This weakness is addressed in this paper, through the development of the “Stochastic Model of Energy Poverty” (SMEP). The development of the model includes, firstly, the modeling of energy consumption at household level and, subsequently, the transition from household level to country level through stochastic analysis (Monte-Carlo simulation). Through Sensitivity Analysis, the impact of various parameters on energy poverty is quantified for the first time, by determining their weighting factors. Applied to the case of Greece, it is found that energy poverty reaches 70.4%, with income being the decisive factor affecting energy poverty at 63%, while other variables (H tot , etc.) follow at significantly lower percentages. The findings can be used in order to assess in advance the effectiveness of energy poverty measures, making the model a valuable policy tool.
    Print ISSN: 0301-4215
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Political Science
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  • 20
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    Elsevier
    Publication Date: 2018-02-18
    Description: Publication date: May 2018 Source: Energy Policy, Volume 116 Author(s): Jonathan A. Batten, Harald Kinateder, Peter G. Szilagyi, Niklas F. Wagner COP21 implementation should lead to a decline in the future demand for fossil fuels. One key implication for investors is how to manage this risk. We construct a monthly stock and oil market integration index and demonstrate that oil investors can offset adverse oil price risk by holding diversified global stock portfolios. The portfolios are formed from eight different combinations of developed and emerging stock markets. We show that measuring the degree of stock-oil market integration is critical to managing the time-varying degrees of integration. Under normal market conditions markets are segmented and this yields the opportunity for oil investors to diversify energy price risk through the purchase of stocks. The optimal oil-stock diversified portfolio provides risk-adjusted positive benefits to investors, with portfolio weights changing over time as COP21 implementation proceeds.
    Print ISSN: 0301-4215
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Political Science
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  • 21
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    Elsevier
    Publication Date: 2018-02-22
    Description: Publication date: Available online 21 February 2018 Source: Geoscience Frontiers Author(s): Nan Zhang, Zhuo Dang, Chuan Huang, Zheng-Xiang Li Understanding the dominant force responsible for supercontinent breakup is crucial for establishing Earth’s geodynamic evolution that includes supercontinent cycles and plate tectonics. Conventionally, two forces have been considered: the push by mantle plumes from the sub-continental mantle which is called the active force for breakup, and the dragging force from oceanic subduction retreat which is called the passive force for breakup. However, the relative importance of these two forces is unclear. Here we model the supercontinent breakup coupled with global mantle convection in order to address this question. Our global model features a spherical harmonic degree-2 structure, which includes a major subduction girdle and two large upwelling (superplume) systems. Based on this global mantle structure, we examine the distribution of extensional stress applied to the supercontinent by both sub-supercontinent mantle upwellings and subduction retreat at the supercontinent peripheral. Our results show that: (1) at the center half of the supercontinent, plume push stress is ∼3 times larger than the stress induced by subduction retreat; (2) an average hot anomaly of no higher than 50 K beneath the supercontinent can produce a push force strong enough to cause the initialization of supercontinent breakup; (3) the extensional stress induced by subduction retreat concentrates on a ∼600 km wide zone on the boundary of the supercontinent, but has far less impact to the interior of the supercontinent. We therefore conclude that although circum-supercontinent subduction retreat assists supercontinent breakup, sub-supercontinent mantle upwelling is the essential force. Graphical abstract
    Print ISSN: 1674-9871
    Topics: Geosciences
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  • 22
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    Elsevier
    Publication Date: 2018-02-22
    Description: Publication date: Available online 21 February 2018 Source: Geoscience Frontiers Author(s): Peng Zhang, Rina Zuraida, Yair Rosenthal, Ann Holbourn, Wolfgang Kuhnt, Jian Xu Test geochemistry of planktonic foraminifera is an indispensable tool in reconstructing past ocean hydrological changes. It is essential to investigate region-specific implications of test geochemistry, although those established from other regions can be broadly applied. In this study, characteristics of δ 18 O and Mg/Ca from tests of four planktonic foraminiferal species, Globigerinoides ruber sensu stricto (s.s.), Globigerinoides sacculifer , Pulleniatina obliquiloculata and Neogloboquadrina dutertrei, from 60 core-top sediment samples retrieved from the Indonesian Throughflow (ITF) region were studied. These geochemical data were compared with modern hydrographic profiles in order to assess their relations and to investigate potential implications of test geochemical parameters in reconstructing past oceanographic change in the ITF region. Calcification depths of these four species were first estimated based on comparison between measured test δ 18 O and predicted calcite δ 18 O that was calculated from modern temperature and salinity. The results indicate that G. ruber s.s. and G. sacculifer calcify within the mixed-layer at 0–50 m and 20–75 m, respectively, whereas P. obliquiloculata and N. dutertrei calcify within the thermocline at around 75 to 125 m. A combined study of excess Mg/Ca (difference between measured and predicted Mg/Ca) and salinity suggests that salinity exerts a negligible impact on test Mg/Ca of these foraminiferal species in the ITF region. Comparison of test Mg/Ca-derived temperatures with temperature profiles of the upper 200 m of the water column from the seas of the ITF region also indicate calcification depths of these species, which match well with the above estimations using test δ 18 O. It further indicates that G. sacculifer may be more sensitive in reflecting changes in the depth of the mixed-layer, highlighting a potential use of Mg/Ca temperature difference between G. ruber s.s. and G. sacculifer in reconstructing the depth of the mixed-layer in the ITF region. Graphical abstract
    Print ISSN: 1674-9871
    Topics: Geosciences
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  • 23
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    Elsevier
    Publication Date: 2018-02-22
    Description: Publication date: Available online 21 February 2018 Source: Global Ecology and Conservation Author(s): Jennifer Rebecca Kelly Research has given the illegal trade of feline derivatives in Mexico as well as Central and South America little attention. The purpose of this article is to: 1) Begin a dialogue among human dimensions of wildlife scholars about the economic and cultural values of feline derivatives throughout Mexico, Central and South America; 2) Present the range of economic values that emerged in my interview and participant observation data from Costa Rica; 3) Offer an explanation of how sociological concepts influence the buying and selling of dead jaguars ( Panthera onca ), pumas ( Puma concolor ), and ocelots ( Leopardus pardalis ) in Costa Rica. The principal results are: 1) The sociological concepts of social status and masculine identity interlace with and motivate the illegal trade; 2) The value of feline parts in Costa Rica ranges from $25 to $5000; 3) This value differs by culture and geographic residency of the seller (urban versus rural) and diverged from values discovered in other countries; 4) The men who adorn their homes with illegal trophies are not necessarily the poachers. The value of jaguar skin has been recorded for as little as $100 in a 1983 study conducted in Belize and for as high as $600 in a study done in Venezuela in approximately 2011. Because of cultural differences, Cabécar sell a feline skin for as little as $25 and up to $400 if it includes teeth and nails, but Ticos, who are non-indigenous Costa Ricans, sell the skins from $500-$5000. Non-indigenous, wealthy urban men indicate prestige by the display of feline parts. My findings align with existing research that jaguar skins are sold to people in larger cities and that adornment of feline derivatives is a masculine tradition that can be linked with Amerindian cultures and ancient times. Historically jaguars have been associated with elitist symbolism and evidence in this study suggests this continues in today's culture as a sign of social status. Results suggest that money alone does not drive illegal hunting. The contribution of this study urges researchers to: 1) develop a typology which includes the characteristics of not only the poachers, but also the buyers of illegal wildlife parts; 2) evaluate concepts of culture, geographic residency, masculine identity, and social status in the illegal trade of feline derivatives in Mexico, Central, and South America.
    Print ISSN: 2351-9894
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering
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    Publication Date: 2018-02-22
    Description: Publication date: March 2018 Source: Global Environmental Change, Volume 49 Author(s): Hannah Ritchie, David S. Reay, Peter Higgins The global food system faces an ambitious challenge in meeting nutritional demands whilst reducing sector greenhouse gas emissions. These challenges exemplify dietary inequalities—an issue countries have committed to ending in accord with the Sustainable Development Goals (by 2030). Achieving this will require a convergence of global diets towards healthy, sustainable guidelines. Here we have assessed the implications of dietary guidelines (the World Health Organization, USA, Australian, Canadian, German Chinese and Indian recommendations) on global greenhouse gas emissions. Our results show a wide disparity in the emissions intensity of recommended healthy diets, ranging from 687 kg of carbon dioxide equivalents (CO 2 e) capita −1  yr −1 for the guideline Indian diet to the 1579 kg CO 2 e capita −1  yr −1 in the USA. Most of this variability is introduced in recommended dairy intake. Global convergence towards the recommended USA or Australian diet would result in increased greenhouse gas emissions relative to the average business-as-usual diet in 2050. The majority of current national guidelines are highly inconsistent with a 1.5 °C target, and incompatible with a 2 °C budget unless other sectors reach almost total decarbonisation by 2050. Effective decarbonisation will require a major shift in not only dietary preferences, but also a reframing of the recommendations which underpin this transition.
    Print ISSN: 0959-3780
    Electronic ISSN: 1872-9495
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering
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    Publication Date: 2018-02-18
    Description: Publication date: Available online 17 February 2018 Source: Technological Forecasting and Social Change Author(s): Fang-Mei Tseng, Robert Harmon
    Print ISSN: 0040-1625
    Electronic ISSN: 1873-5509
    Topics: Sociology , Technology
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    Publication Date: 2018-02-18
    Description: Publication date: Available online 17 February 2018 Source: Technological Forecasting and Social Change Author(s): Jörg Musiolik, Jochen Markard, Marko Hekkert, Bettina Furrer Novel technologies require the support of larger technological innovation systems (TIS). A key feature of innovation systems are system resources - collective structures such as common standards, support programs, shared expectations or testing facilities all actors can use. System resources emerge either uncoordinated or as a result of strategic action by ‘system builders’. In this paper we explore the conditions of system building. Taking a strategy perspective, we analyze how system building depends on resource constellations at a certain point in time. Drawing from research in the field of stationary fuel cells in Germany, we identify three generic modes, of system building: a) the “single mode”, in which a system builder uses its own organizational resources to create a system resource, b) the “partner mode”, in which a system builder joins forces with partners in order to co-create system resources, and c) the “intermediary mode”, in which a system builder collaborates with other actors to set up an intermediary organization, which then works towards the creation of system resources. We show that the modes were chosen depending on i) what resources were initially available and ii) how they were distributed in the innovation system. Our paper contributes to a more differentiated understanding of system building in the TIS literature and beyond.
    Print ISSN: 0040-1625
    Electronic ISSN: 1873-5509
    Topics: Sociology , Technology
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  • 27
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    Publication Date: 2018-02-18
    Description: Publication date: July 2018 Source: Transportation Research Part D: Transport and Environment, Volume 62 Author(s): HyungBin Moon, Stephen Youngjun Park, Changhyun Jeong, Jongsu Lee The spread of electric vehicles (EVs) and their increasing demand for electricity has placed a greater burden on electricity generation and the power grid. In particular, the problem of whether to expand the electricity power stations and distribution facilities due to the construction of EV charging stations is emerging as an immediate issue. To effectively meet the demand for additional electricity while ensuring the stability of the power grid, there is a need to accurately predict the charging demands for EVs. Therefore, this study estimates the changes in electricity charging demand based on consumer preferences for EVs, charging time of day, and types of electric vehicle supply equipment (EVSE) and elucidates the matters to be considered for constructing EV infrastructure. The results show that consumers mainly preferred charging during the evening. However, when we considered different types of EVSEs (public and private) in the analysis, people preferred to charge at public EVSEs during the day. During peak load time, people tended to prefer charging using fast public EVSEs, which shows that consumers considered the tradeoffs between the full charge time and the price for charging. Based on these findings, this study provides key political implications for policy makers to consider in taking preemptive measures to adjust the electricity supply infrastructure.
    Print ISSN: 1361-9209
    Electronic ISSN: 1879-2340
    Topics: Architecture, Civil Engineering, Surveying , Energy, Environment Protection, Nuclear Power Engineering
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    Publication Date: 2018-02-18
    Description: Publication date: July 2018 Source: Transportation Research Part D: Transport and Environment, Volume 62 Author(s): Kaushali Dave, Jeremy Toner, Haibo Chen Traffic noise has been known to severely affect human population. The valuation of traffic noise pose a significant challenge in choice experiments as respondents have little understanding of the physical measure of noise and its associated perception. As a result, several techniques have been developed that represent noise using different methods, either based on the level of noise exposure or the respondent’s level of noise annoyance. This study examines the effect of different methods of attribute representation on respondents’ attribute understanding and valuation. The study is focussed on residential choice and residential view and sunlight are important attributes that are examined along with traffic noise. The study demonstrates that the methods of attribute representation have an important effect on respondents’ understanding of the attributes as well as in the subsequent valuation. It was found that attribute such as view is better represented using the location representation while noise is better represented using the linguistic method. Moreover, the method of attribute modelling also plays a significant role in the analysis as certain data input techniques are more suitable for some representation methods.
    Print ISSN: 1361-9209
    Electronic ISSN: 1879-2340
    Topics: Architecture, Civil Engineering, Surveying , Energy, Environment Protection, Nuclear Power Engineering
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  • 29
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    Publication Date: 2018-02-18
    Description: Publication date: Available online 17 February 2018 Source: Transportation Research Part E: Logistics and Transportation Review Author(s): Xiaotong Liu, Kai Zhang, Bokui Chen, Jun Zhou, Lixin Miao This paper explored the supply chain coordination issues arising from the One Belt and One Road initiative (OBOR), and investigated the impacts of the cost sharing contract on the key decisions for logistics service supply chain with mass customization. Our motivation was derived from the growing individualized demands for logistics service in the OBOR region. In this study, a logistics services supply chain, consisting of one functional logistic service provider (FLSP) and one logistics service integrator (LSI), was considered and performed on the OBOR. Based on a game theoretic approach, the supply chain performance was evaluated with four models of the cost sharing contract between the FLSP and the LSI, respectively. As a result, several key managerial insights were discovered in our modeling study. More importantly, the impacts of cost-sharing on the key decisions of each player was analyzed in details, and the interaction mechanism of mass customization was also estimated. From our perspective, it will be indeed beneficial to improving logistics service in the OBOR region.
    Print ISSN: 1366-5545
    Electronic ISSN: 1878-5794
    Topics: Architecture, Civil Engineering, Surveying , Economics
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    Publication Date: 2018-02-19
    Description: Publication date: Available online 17 February 2018 Source: Data in Brief Author(s): Taku Naito, Sawako Muroi, Ichiro Taniuchi, Motonari Kondo The data presented here are related to the research article entitled “Loss of Eed leads to lineage instability and increased CD8 expression of mouse CD4 + T cells upon TGFβ signaling” [1] . The cited research article investigates the molecular mechanism of CD8α upregulation observed in Eed -deficient ( ∆Eed ) CD4 + T cells upon activation in the presence of TGFβ. This data report describes the effect of retinoic acid (RA) and/or interferon-gamma (IFNγ) supplementation on up-regulation of CD8α and Foxp3 in ∆Eed CD4 + T cells, the effect of dose or timing of TGFβ treatment on CD4 + T cell identity of ∆Eed , adding further information regarding the conditions that induces CD8α, and mRNA expression changes of genes encoding polycomb repressive complex 2 (PRC2) subunits by TGFβ treatment.
    Print ISSN: 2352-3409
    Topics: Biology
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    Publication Date: 2018-02-19
    Description: Publication date: Available online 17 February 2018 Source: Data in Brief Author(s): S.H. Kim, J.Y. Lee, Y.S. Yoon This data is related to the article entitled “Effect of Composite Structure on Capacity Instability of SnO 2 -Coated Multiwalled Carbon Nanotube Composite Anode” (S. H. Kim et al., 2018) [1] . This data provides the information about capacitance instability of a composite anode material based on multiwalled carbon nanotube (MWCNT) coated with crystalline and amorphous SnO 2 and Sn on the inner and outer walls of MWCNT fabricated by a simple wet synthesis method.
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    Topics: Biology
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  • 32
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    Publication Date: 2018-02-19
    Description: Publication date: Available online 16 February 2018 Source: Data in Brief Author(s): Lekan M. Amusan, Adedeji Afolabi, Raphael Ojelabi, Ignatius Omuh, Hilary I. Okagbue This data article explores the factors that contribute to maintaining steady cost projection on construction projects. The data was obtained using structured questionnaire designed in Likert scale. The responses were solicited from category of construction practitioners. Simple random sampling was employed in the distribution of the questionnaires to the respondents. Data samples were analysed using severity index, ranking and simple percentages. The analysis of the data brought to fore some important data on factors that causes cost overrun, they include: contractor's inexperience, inadequate planning, inflation, incessant variation order, and change in project design. They are critical to causing cost overrun, while project complexity, shortening of project period and fraudulent practices are found to be responsible. The data fall within the percentages of possible consequences of cost overrun when compared with those available in scientific literature. The data can provide insights on how to mitigate the risks of project deviation from initial cost and as-built project.
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    Topics: Biology
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    Publication Date: 2018-02-20
    Description: Publication date: Available online 19 February 2018 Source: Technological Forecasting and Social Change Author(s): Henry L. Petersen, Fred Lemke
    Print ISSN: 0040-1625
    Electronic ISSN: 1873-5509
    Topics: Sociology , Technology
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    Publication Date: 2018-02-23
    Description: Publication date: Available online 22 February 2018 Source: Human Resource Management Review Author(s): Hannes Leroy, Jesse Segers, Dirk van Dierendonck, Deanne den Hartog The studies of Leadership and HR-Management share a common goal: Developing a better understanding of how to effectively manage people in organizations. Despite this shared goal, these fields of research remain largely independent, with few studies considering how HRM and Leadership co-determine employee motivation and performance. This state of the literature is deplorable as Leadership and HRM have the potential to counterbalance each other; in theory as well as in research design. In this overview article to this special issue, we first highlight similarities and differences in approaches to people management by mapping key approaches to Leadership and HRM on a value framework. Next, we integrate theory on person-environment fit and strategic HR alignment to map seven possible ways in which Leadership and HRM may interact: Independent, Enactment, Supplementary Fit, Synergistic Fit, Complementary Fit, Perceptual Filter, and Dynamic Fit. We discuss the implications of this theoretical framework for future research that studies the intersection of Leadership and HRM.
    Print ISSN: 1053-4822
    Electronic ISSN: 1873-7889
    Topics: Economics
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  • 35
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    Publication Date: 2018-02-23
    Description: Publication date: December 2017 Source: International Journal of Sustainable Built Environment, Volume 6, Issue 2
    Electronic ISSN: 2212-6090
    Topics: Architecture, Civil Engineering, Surveying
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    Publication Date: 2018-02-21
    Description: Publication date: Available online 20 February 2018 Source: Energy Economics Author(s): Hamed Ghoddusi, Nima Rafizadeh, Mohammad H. Rahmati We estimate the price elasticity of the demand for gasoline smuggling in Iran. For this purpose, we employ a detailed panel of monthly gasoline consumption data from 160 distribution hubs during the period 2005-2014. We apply two different approaches which are diff-in-diff and panel data estimations. The results suggest that the foreign-to-home gasoline price ratios have a significant impact on the time-varying elasticity of demand. This finding supports the hypothesis that an increase in domestic gasoline prices will significantly reduce the demand for smuggling. In addition, as the distance of a region from its closest higher-price neighboring country diminishes, the price elasticity of demand for gasoline smuggling for that region declines as well. Finally, we find that when the ratio of foreign to domestic prices is higher, the gasoline demand sensitivities to price in neighboring countries go up. Our work offers new insights regarding the welfare impact of removing fuel subsidies and modifying fuel pricing policies.
    Print ISSN: 0140-9883
    Electronic ISSN: 1873-6181
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Economics
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    Publication Date: 2018-02-21
    Description: Publication date: Available online 17 February 2018 Source: Energy Economics Author(s): Paul Simshauser Energy-only markets have an inherently unstable equilibrium, even under ideal conditions, because participants are unable to optimise VoLL events. The addition of intermittent renewable generation is thought to make conditions harder. In this article, optimal VoLL events in an islanded NEM region is modelled by substituting high price caps for Boiteux capacity charges, then analysing the impact of adding progressively more Variable Renewable Energy (VRE) – up to 35% market share. Spot market conditions prove stable and tractable provided thermal plant exit and adjust perfectly. But VRE asset allocation is important; absent highly elastic demand or ultra-low cost storage, solar PV market share has economic limits because the technology rapidly cannibalises itself. Furthermore, as VRE rises in imperfectly interconnected regions, a tipping point appears to exist where hedge markets enter an unstable zone through shortages of ‘asset-backed’ firm intra-regional swaps and caps. Government-initiated CfDs for VRE need to be designed carefully to ensure any instability is not exacerbated by extracting contracts from an already shortening hedge market.
    Print ISSN: 0140-9883
    Electronic ISSN: 1873-6181
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Economics
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    Publication Date: 2018-02-21
    Description: Publication date: Available online 20 February 2018 Source: Geoscience Frontiers Author(s): Hugo Moreira, Luís Seixas, Craig Storey, Mike Fowler, Stephanie Lasalle, Ross Stevenson, Cristiano Lana Plutonic rocks from the Mineiro Belt, Brazil record a delayed onset of the transition from TTG to sanukitoid-type magmatism (high Ba-Sr), starting during the Siderian magmatic lull when little juvenile magma was added to the continental crust. Rocks mostly belong to the calc-alkaline series, meta- to peraluminous and originally “I-type”, meaning that oxidized magmas were formed by partial melting of subducted material. The temporal distribution and apparent secular changes of the magmas are consistent with the onset of subduction-driven plate tectonics due to an increase of the subduction angle and opening of the mantle wedge. New isotopic analyses (Sm-Nd whole rock and Lu-Hf in zircon) corroborate the restricted juvenile nature of the Mineiro Belt and confirm the genetic link between the Lagoa Dourada Suite, a rare ca. 2350 Ma high-Al tonalite-trondhjemite magmatic event, and the sanukitoid-type ca. 2130 Ma Alto Maranhão Suite. U-Pb dating of zircon and titanite constrain the crystallisation history of plutonic bodies; coupled with major and trace element analyses of the host rocks, they distinguish evolutionary trends in the Mineiro Belt. Several plutons in the region have ages close to 2130 Ma but are distinguished by the lower concentration of compatible elements in the juvenile high Ba-Sr suite.
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    Topics: Geosciences
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    Publication Date: 2018-02-21
    Description: Publication date: Available online 19 February 2018 Source: Microbes and Infection Author(s): D. Zamith-Miranda, L. Nimrichter, M.L. Rodrigues, J.D. Nosanchuk The secretion of biomolecules by fungal cells occurs via the conventional export of signal peptide-coupled soluble molecules, but it also results from transport within extracellular vesicles (EV). During the last ten years since the description of this non-conventional secretion pathway, varied, interesting biological roles have been associated with EV release by fungi. The various organic molecules carried by these structures are involved in pathogenesis and immune evasion, and may be associated with cell-cell communication. In regards to host-pathogen interactions, EV roles are diverse and organism-specific, although some features seem to be conserved among the pathogenic fungal organisms studied to date. This review aims to highlight our current understanding of the biologically relevant findings regarding EV released by the pathogenic fungal organisms and describes our knowledge of the roles of EV in host-pathogen interactions.
    Print ISSN: 1286-4579
    Electronic ISSN: 1769-714X
    Topics: Medicine
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    Publication Date: 2018-02-01
    Description: Publication date: Available online 31 January 2018 Source: Developmental Biology Author(s): Yunzi Gou, Shruti Vemaraju, Elly M. Sweet, Hye-Joo Kwon, Bruce B. Riley Formation of neural and sensory progenitors in the inner ear requires Sox2 in mammals, and in other species is thought to rely on both Sox2 and Sox3 . How Sox2 and/or Sox3 promote different fates is poorly understood. Our mutant analysis in zebrafish showed that sox2 is uniquely required for sensory development while sox3 is uniquely required for neurogenesis. Moderate misexpression of sox2 during placodal stages led to development of otic vesicles with expanded sensory and reduced neurogenic domains. However, high-level misexpression of sox2 or sox3 expanded both sensory and neurogenic domains to fill the medial and lateral halves of the otic vesicle, respectively. Disruption of medial factor pax2a eliminated the ability of sox2/3 misexpression to expand sensory but not neurogenic domains. Additionally, mild misexpression of fgf8 during placodal development was sufficient to specifically expand the zone of prosensory competence. Later, cross-repression between atoh1a and neurog1 helps maintain the sensory-neural boundary, but unlike mouse this does not require Notch activity. Together, these data show that sox2 and sox3 exhibit intrinsic differences in promoting sensory vs. neural competence, but at high levels these factors can mimic each other to enhance both states. Regional cofactors like pax2a and fgf8 also modify sox2/3 functions.
    Print ISSN: 0012-1606
    Electronic ISSN: 1095-564X
    Topics: Biology
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    Publication Date: 2018-02-01
    Description: Publication date: Available online 31 January 2018 Source: Energy Economics Author(s): Elie Bouri, Syed Jawad Hussain Shahzad, Naveed Raza, David Roubaud We study the dependence between oil implied volatility shocks and BRICS sovereign risk from July 2009 to March 2017. First, we examine spillovers in value at risk using multivariate regression quantiles and reveal that oil volatility represents a common risk for oil-exporting and oil-importing BRICS countries. We also employ a quantile impulse-response function and reveal the presence of an asymmetry in the mechanisms of shock transmissions between oil exporters (Russia and Brazil) and oil importers (China and India): the former are more sensitive to positive oil shocks, whereas the latter are more sensitive to negative oil shocks. Second, we measure the directional predictability in the quantiles using the bivariate cross-quantilogram approach and show that in most cases, a low- (high-) volatility of oil market predicts low (high) sovereign risk at various quantiles and lags. Policy implications are discussed.
    Print ISSN: 0140-9883
    Electronic ISSN: 1873-6181
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Economics
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    Publication Date: 2018-02-01
    Description: Publication date: 16 May 2018 Source: European Journal of Operational Research, Volume 267, Issue 1
    Print ISSN: 0377-2217
    Electronic ISSN: 1872-6860
    Topics: Mathematics , Economics
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    Publication Date: 2018-02-01
    Description: Publication date: 16 May 2018 Source: European Journal of Operational Research, Volume 267, Issue 1 Author(s): Teun van Gils, Katrien Ramaekers, An Caris, René B.M. de Koster Warehouses deliver labor-intensive services to customers. Underperformance may result in high costs and unsatisfied customer demand. New market developments force warehouses to handle a large number of orders within tight time windows. To cope with this, order picking operations need to be optimized by solving a wide range of planning problems. Optimizing order picking planning problems sequentially may yield a suboptimal overall warehouse performance. Still, previous warehouse planning reviews focus on individual planning problems. This literature review differs by investigating combinations of multiple order picking planning problems. A state-of-the-art review and classification of the scientific literature investigating combinations of tactical and operational order picking planning problems in picker-to-parts systems is presented with the aim of determining how planning problems are related. Furthermore, this literature review aims to find excellent policy combinations and to provide guidelines how warehouse managers can benefit from combining planning problems, in order to design efficient order picking systems and improve customer service. Combining multiple order picking planning problems results in substantial efficiency benefits, which are required to face new market developments. Graphical abstract
    Print ISSN: 0377-2217
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    Publication Date: 2018-02-01
    Description: Publication date: 16 May 2018 Source: European Journal of Operational Research, Volume 267, Issue 1 Author(s): Matteo Fischetti, Michele Monaci, Markus Sinnl We consider a subfamily of mixed-integer linear bilevel problems that we call Generalized Interdiction Problems. This class of problems includes, among others, the widely-studied interdiction problems, i.e., zero-sum Stackelberg games where two players (called the leader and the follower) share a set of items, and the leader can interdict the usage of certain items by the follower. Problems of this type can be modeled as Mixed-Integer Nonlinear Programming problems, whose exact solution can be very hard. In this paper we propose a new heuristic scheme based on a single-level and compact mixed-integer linear programming reformulation of the problem obtained by relaxing the integrality of the follower variables. A distinguished feature of our method is that general-purpose mixed-integer cutting planes for the follower problem are exploited, on the fly, to dynamically improve the reformulation. The resulting heuristic algorithm proved very effective on a large number of test instances, often providing an (almost) optimal solution within very short computing times.
    Print ISSN: 0377-2217
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    Topics: Mathematics , Economics
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    Publication Date: 2018-02-01
    Description: Publication date: 16 May 2018 Source: European Journal of Operational Research, Volume 267, Issue 1 Author(s): Bogdan Grechuk, Michael Zabarankin In a typical one-period decision making model under uncertainty, unknown consequences are modeled as random variables. However, accurately estimating probability distributions of the involved random variables from historical data is rarely possible. As a result, decisions made may be suboptimal or even unacceptable in the future. Also, an agent may not view data occurred at different time moments, e.g. yesterday and one year ago, as equally probable. The agent may apply a so-called “time” profile (weights) to historical data. To address these issues, an axiomatic framework for decision making based directly on historical time series is presented. It is used for constructing data-based analogues of mean-variance and maxmin utility approaches to optimal portfolio selection.
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    Topics: Mathematics , Economics
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    Publication Date: 2018-02-01
    Description: Publication date: 16 May 2018 Source: European Journal of Operational Research, Volume 267, Issue 1 Author(s): Juan Aparicio, Daniel Santin Aparicio, Crespo-Cebada, Pedraja-Chaparro, and Santin (2017) recently extended the Camanho and Dyson (2006) Malmquist-type index (CDMI) for determining group performance in cross-sectional studies to panel or pseudo-panel databases. In that paper, it was shown that the pseudo-panel Malmquist index (PPMI) can be easily interpreted as the ratio of aggregated productivity changes in two groups of decision making units over time, if and only if a new difficult-to-interpret term, the so called ‘divergence component’ (DC), is equal to one. The aim of this paper is twofold. First, based upon considering a baseline group technology, we define a new base-group base-period PPMI where the DC always vanishes. Second, when more than two groups are analyzed, we show that under this framework the new base-group base-period PPMI, the new base-group CDMI and the components of both indexes satisfy the circular relation. Both results will make it easier for practitioners applying the two indexes in different economic sectors, regardless of how many groups are being compared.
    Print ISSN: 0377-2217
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    Topics: Mathematics , Economics
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    Publication Date: 2018-02-01
    Description: Publication date: 16 May 2018 Source: European Journal of Operational Research, Volume 267, Issue 1 Author(s): Graham Willis, Siôn Cave, Martin Kunc This paper presents a description of the development and use of a framework for strategic workforce planning for healthcare at the national level. The framework is called the Robust Workforce Planning Framework, and was developed by the Centre for Workforce Intelligence. The Centre for Workforce Intelligence was a national organisation that delivered workforce planning advice, and was active from July 2010 until March 2016. The Centre was a key contributor to the planning of future workforce requirements for healthcare in England and was primarily commissioned by the English Department of Health, Health Education England and Public Health England, supporting them in national and local strategic workforce planning. The framework involved the use of multiple methodologies, including the development of strategic workforce models based on System Dynamics, and the framework evolved through practise. This paper describes contributions to three areas in the field: healthcare workforce planning models using System Dynamics, the use of System Dynamics to support strategic planning with the integration of multiple methodologies, and facilitated modelling through building and using System Dynamics models in workshops.
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    Topics: Mathematics , Economics
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    Elsevier
    Publication Date: 2018-02-01
    Description: Publication date: 16 May 2018 Source: European Journal of Operational Research, Volume 267, Issue 1 Author(s): Alexana Cranmer, Erin Baker, Juuso Liesiö, Ahti Salo Siting offshore wind farms is a complex problem due to the wake interactions between wind farms. We develop a profit maximizing portfolio model based on underlying network models to track the wake effects through a series of wind farms. Our portfolio model optimizes the siting of wind farms considering multiple wind directions and wind speeds and performs better than simple decision heuristics. Excluding sites from the portfolio has nonlinear impacts on the profitability of the portfolio of sites in that areas excluded from consideration have greater impacts on profit if they are grouped together or aligned parallel to the prevailing wind direction. The model can be readily adapted to include additional cost factors.
    Print ISSN: 0377-2217
    Electronic ISSN: 1872-6860
    Topics: Mathematics , Economics
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    Publication Date: 2018-02-01
    Description: Publication date: 16 May 2018 Source: European Journal of Operational Research, Volume 267, Issue 1 Author(s): Jun Zheng, Judit Lienert We used two types of preference elicitation methods based on multi-attribute value theory (MAVT) for a wastewater infrastructure decision in Switzerland. We aimed to register the implementation impacts of two preference elicitation philosophies (aggregation, disaggregation) in a large, real-world case and give guidance on these elicitation approaches for practitioners. We conducted two series of face-to-face interviews with the same ten. The first interview set used direct aggregation preference elicitation methods, which decomposed an additive value model into the elicitation of weights (SMART/SWING-variant) and marginal value functions (bi-section method). In the second interview series, indirect disaggregation was used, based on UTA GMS . The weights and marginal value functions for 19 objectives were later simultaneously inferred with linear programming from pairwise comparisons of hypothetical alternatives. One aim was to design the UTA GMS comparisons for many objectives. Further, we aimed to identify differences and commonalities of the two methods concerning the elicited preferences, the MAVT evaluation results of six real-world wastewater infrastructure alternatives, and the stakeholders’ and analysts’ feedbacks. Similar best alternatives indicate convergence of the two elicitation methods. This demonstrates the applicability of the UTA GMS elicitation procedure to a very complex decision problem. However, the two elicitation methods were perceived differently by the respondents and required different effort from the analysts. For individual stakeholders, preferences were sometimes rather different between the interviews, which could be largely explained by the constructive nature of preference formation. This indicates the importance of supporting stakeholder learning in the application of MCDA.
    Print ISSN: 0377-2217
    Electronic ISSN: 1872-6860
    Topics: Mathematics , Economics
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    Publication Date: 2018-02-01
    Description: Publication date: 16 May 2018 Source: European Journal of Operational Research, Volume 267, Issue 1 Author(s): Liam J.A. Lenten, Aaron C.T. Smith, Noel Boys This article considers an adjustment to the method of determining the order of draft picks in the Australian Football League (AFL). Rather than pure reverse order based on the end-of-season ladder (standings), an alternative draft-pick allocation (henceforth called ‘ADPA’) policy is proposed and evaluated. It holds that the draft-pick order rule shall give the top pick the team eliminated first (i.e. after fewest matches played) from the finals series (playoffs), and the remainder in order of elimination. Employing a quasi-natural experiment using data obtained from a sample of 2288 regular-season games from 1997 to 2009, the ADPA policy produced an estimated 21.7% improvement in an already-eliminated team's probability of winning late-season matches. A review of the business case underpinning the ADPA reveals a series of benefits for the AFL. In addition to improving fans’ late-season engagement, the policy would offer a fairer system of draft distributions that would augment league equalisation and enhance the AFL's integrity principles.
    Print ISSN: 0377-2217
    Electronic ISSN: 1872-6860
    Topics: Mathematics , Economics
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    Publication Date: 2018-02-22
    Description: Publication date: Available online 20 February 2018 Source: Computers & Operations Research Author(s): Andrew Brint, Goudarz Poursharif, Mary Black, Mark Marshall Access to smart meter data will enable electricity distribution companies to have a far clearer picture of the operation of their low voltage networks. This in turn will assist in the more active management of these networks. An important current knowledge gap is knowing for certain which phase each customer is connected to. Matching the loads from the smart meter with the loads measured on different phases at the substation has the capability to fill this gap. However, in the United Kingdom at the half hourly level only the loads from groups of meters will be available to the network operators. Therefore, a method is described for using this grouped data to assist with determining each customer's phase when the phase of most meters is correctly known. The method is analysed using the load readings from a data set of 96 smart meters. It successfully ranks the mixed phase groups very highly compared with the single phase groups.
    Print ISSN: 0305-0548
    Electronic ISSN: 1873-765X
    Topics: Mathematics , Economics
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    Publication Date: 2018-02-22
    Description: Publication date: April 2018 Source: Data in Brief, Volume 17 Author(s): Pankaj Kumar Singh, Sayak Ganguli, Amita Pal Blackgram ( Vigna mungo ) is one of primary legumes cultivated throughout India, Cv.T9 being one of its common high yielding cultivar. This article reports RNA sequencing data and a pipeline for prediction of novel long non-coding RNAs from the sequenced data. The raw data generated during sequencing are available at Sequence Read Archive (SRA) of NCBI with accession number- SRX1558530
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    Topics: Biology
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    Publication Date: 2018-02-22
    Description: Publication date: April 2018 Source: Data in Brief, Volume 17 Author(s): Longlu Ran, Yan Ding, Liangzhi Luo, Xiuhai Gan, Xiangyang Li, Yongzhong Chen, Deyu Hu, Baoan Song The data present binding constants between ferulic acid derivatives and the Coat Protein (P10) by fluorescence titration in this article, which is hosted in the research article entitled “Interaction Research on an Antiviral Molecule that Targets the Coat Protein of Southern rice black-streaked dwarf virus ’’ (Ran et al., 2017) [1]. The data include fluorescence quenching spectrum, Stern–Volmer quenching constants, and binding parameters. In this article, a more comprehensive data interpretation and analysis is explained.
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    Publication Date: 2018-02-22
    Description: Publication date: April 2018 Source: Data in Brief, Volume 17 Author(s): Zhe Chen, Steven Gutowski, Paul C. Sternweis The Pleckstrin homology (PH) domains from the Lbc family of Rho Guanine Nucleotide Exchange Factors (Lbc RhoGEFs) interact with activated Rho family GTPases. All 7 Lbc RhoGEFs associate directly with activated Rho GTPases via their PH domains. However, the binding affinities between the PH domains and the GTPases vary greatly. Here we present two crystal structures at resolutions of 1.4 Å and 2.0 Å of RhoA complexed with the PH domain from p114RhoGEF (PDB access code 6BCB) and AKAP-LbcRhoGEF (PDB access code 6BCA), respectively. These high resolution structures, together with the earlier structures of PDZRhoGEF-PH·RhoA and p190RhoGEF-PH·RhoA complexes, identify a highly conserved interface between the PH domains from Lbc-RhoGEFs and activated Rho GTPases. This manuscript is related to the manuscript titled “Direct Regulation of p190RhoGEF by Activated Rho and Rac GTPases” published in the Journal of Structural Biology.
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    Publication Date: 2018-02-22
    Description: Publication date: April 2018 Source: Data in Brief, Volume 17 Author(s): Sylvain Dépigny, Frédéric Tchotang, Médard Talla, Désirée Fofack, David Essomé, Jean-Pierre Ebongué, Bernard Kengni, Thierry Lescot The ‘Plantain-Optim’ dataset (came from the ‘Plantain-Optim’ experiment conducted from 2009 to 2011 at CARBAP experimental station in Cameroon. The main objective was to describe agronomic potential of nine plantain varieties, including five natural plantains commonly cropped in Cameroon, and four plantain-like hybrids. A completely randomized bloc permitted to compare growth, development and yield of 45 plants per variety split between five replicates. Cropping practices guarantied non-limiting and homogenous conditions. Each plant was measured every 15 days. Data described aerial organ sizes, foliar structure and bunch characteristics of the mother plant. The ‘Plantain-Optim’ dataset includes the complete individual growth of each studied plantain of the ‘Plantain-Optim’ experiment with a 15-day accuracy. It is a useful standard of plantain varietal diversity for comparison with others datasets. Varietal growth and development homogeneity, biomass production or foliar and bunch structures could be further investigated. Moreover, these accurate data on plantain growth could be valuable for plantain 3D modelling.
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    Publication Date: 2018-02-22
    Description: Publication date: April 2018 Source: Data in Brief, Volume 17 Author(s): Cheng-Hui Zeng, Hao-Ran Li, Zi-Qi Liu, Fei Chen, Shengliang Zhong In this data article, we present the structural and PARD data of the Ln-MOFs. Detailed structure, luminescence and sensing properties were discussed in our previous study (Zeng et al., in press) [1] The data includes the SBU structure patterns of these Ln-MOFs, thermostability of Ln-MOFs in water and also detailed structure information listed in Tables 1–8 .
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    Publication Date: 2018-02-22
    Description: Publication date: April 2018 Source: Data in Brief, Volume 17 Author(s): Jeeranan Manokawinchoke, Praphawi Nattasit, Tanutchaporn Thongngam, Prasit Pavasant, Kevin A. Tompkins, Hiroshi Egusa, Thanaphum Osathanon Indirect immobilized ligand has been shown as an effective technique to activate Notch signalling in vitro. The data presented in this article are related to the published article entitled “Indirect immobilized Jagged1 suppresses cell cycle progression and induces odonto/osteogenic differentiation in human dental pulp cells” (Manokawinchoke et al. 2017) [1]. This data article describes gene expression in indirect immobilized Jagged1 treated human dental pulp cells (hDPs) using high throughput RNA sequencing technique. These data are valuable to analyze the regulation of Notch signalling in hDPs for understanding its molecular mechanism(s). Raw RNA sequencing data were deposited in the NCBI Sequence Read Archive ( SRP100068 ) and NCBI Gene Expression Omnibus ( GSE94989 ).
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    Publication Date: 2018-02-22
    Description: Publication date: April 2018 Source: Data in Brief, Volume 17 Author(s): Rinat Sultanov, Olga Lebedeva, Georgij Arapidi, Maria Lagarkova, Sergei Kiselev The genetic reprogramming technology allows generation of induced pluripotent stem cells (iPSCs) from somatic cells (Takahashi and Yamanaka, 2006) [1] . iPSCs have the ability to self-renew, and to differentiate into any type of somatic cells, and are considered as a promising tool for drug development, disease modeling, and regenerative medicine. The reprogramming factors (oct4, sox2, klf4, c-myc) can be delivered to the cell nucleus either by vectors integrating into the genome (lentiviruses, retroviruses) or by non-integrative methods (e.g., plasmids, Sendai virus, synthetic mRNAs and recombinant proteins). To evaluate the contribution of the reprogramming process isogenic system should be utilized (Shutova et al., 2016) [2] . Isogenic iPSC lines, obtained in different ways can serve the ideal system to investigate DNA methylation changes. The data presented in this article report methylation profiles for iPSC lines derived from fibroblasts of a healthy donor and PARK8-associated Parkinson's disease patient via integrating (lentiviral transfection) and non-integrating (Sendai virus infection) reprogramming using an Illumina 450K Methylation BeadChip platform. The data on DNA methylation of neurons differentiated from iPSC lines are also provided here.
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    Publication Date: 2018-02-22
    Description: Publication date: April 2018 Source: Data in Brief, Volume 17 Author(s): Li-Oon Chuah, Ahamed-Kamal Shamila Syuhada, Ismail Mohamad Suhaimi, Tajudin Farah Hanim, Gulam Rusul This article describes the Pulsed-field gel electrophoresis clustering of the predominant Salmonella strains ( Salmonella ser. Albany, Salmonella ser. Brancaster, and Salmonella ser. Corvallis) isolated from poultry and processing environment in wet market and small-scale processing plant in Penang and Perlis, the northern states of Malaysia. Agar disk diffusion assay was performed to determine the phenotypic antibiotic resistance of these Salmonella strains. The most common antibiograms among the three predominant Salmonella serovars were reported. The presence of integrase genes and antibiotic resistance genes conferring to resistance against β-lactams, aminoglycosides, tetracyclines, quinolones, sulphonamides and chloramphenicol, was detected via PCR amplification.
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    Publication Date: 2018-02-22
    Description: Publication date: April 2018 Source: Data in Brief, Volume 17 Author(s): Hao Zhang, Tianhu Li The data presented in this article are related to the research article entitled "Quantitative determination of linking number differences between circular polynucleosomes and histone H1-bound circular polynucleosomes" Zhang et al. (in press) [1]. DNA linking number differences between histone H1-free and histone H1-bound circular polynucleosomes at various spermidine concentrations was quantitatively determined by chloroquine-based gel electrophoretic analysis in this work, which provides information on the topological effects of histone H1 and spermidine on the linker DNA between nucleosomes.
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    Publication Date: 2018-02-22
    Description: Publication date: Available online 21 February 2018 Source: Transportation Research Part E: Logistics and Transportation Review Author(s): Yenchun Jim Wu, Kune-muh Tsai
    Print ISSN: 1366-5545
    Electronic ISSN: 1878-5794
    Topics: Architecture, Civil Engineering, Surveying , Economics
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    Publication Date: 2018-02-22
    Description: Publication date: March 2018 Source: Transportation Research Part D: Transport and Environment, Volume 59 Author(s): Alejandro Valencia, Akula Venkatram, David Heist, David Carruthers, Saravanan Arunachalam With increased urbanization, there is increased mobility leading to higher amount of traffic-related activity on a global scale. Most NO x from combustion sources (about 90–95%) are emitted as NO, which is then readily converted to NO 2 in the ambient air, while the remainder is emitted largely as NO 2 . Thus, the bulk of ambient NO 2 is formed due to secondary production in the atmosphere, and which R-LINE cannot predict given that it can only model the dispersion of primary air pollutants. NO 2 concentrations near major roads are appreciably higher than those measured at monitors in existing networks in urban areas, motivating a need to incorporate a mechanism in R-LINE to account for NO 2 formation. To address this, we implemented three different approaches in order of increasing degrees of complexity and barrier to implementation from simplest to more complex. The first is an empirical approach based upon fitting a 4 th order polynomial to existing near-road observations across the continental U.S., the second involves a simplified Two-reaction chemical scheme, and the third involves a more detailed set of chemical reactions based upon the Generic Reaction Set (GRS) mechanism. All models were able to estimate more than 75% of concentrations within a factor of two of the near-road monitoring data and produced comparable performance statistics. These results indicate that the performance of the new R-LINE chemistry algorithms for predicting NO 2 is comparable to other models (i.e. ADMS-Roads with GRS), both showing less than ±15% fractional bias and less than 45% normalized mean square error.
    Print ISSN: 1361-9209
    Electronic ISSN: 1879-2340
    Topics: Architecture, Civil Engineering, Surveying , Energy, Environment Protection, Nuclear Power Engineering
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    Publication Date: 2018-02-22
    Description: Publication date: Available online 20 February 2018 Source: Trends in Biotechnology Author(s): Aleksandr Ovsianikov, Ali Khademhosseini, Vladimir Mironov Tissue engineering (TE) is a highly interdisciplinary research field driven by the goal to restore, replace, or regenerate defective tissues. Throughout more than two decades of intense research, different technological approaches, which can be principally categorized into scaffold-based and scaffold-free strategies, have been developed. In this opinion article, we discuss the emergence of a third strategy in TE. This synergetic strategy integrates the advantages of both of these traditional approaches, while being clearly distinct from them. Its characteristic attributes, numerous practical benefits, and recent literature reports supporting our opinion, are discussed in detail.
    Print ISSN: 0167-7799
    Electronic ISSN: 1879-3096
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
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    Publication Date: 2018-02-22
    Description: Publication date: June 2018 Source: World Development, Volume 106 Author(s): Jonathan Bauchet, Sugato Chakravarty, Brian Hunter We examine how microfinance borrowers might signal their repayment responsibility (i.e., borrower quality) by opting into (costly) life insurance purchase along with their micro-loans. We show empirically that borrowers who bought additional life insurance coverage were significantly more likely to fully repay their loan, and were allowed to receive higher loan amounts, even after controlling for borrower health and other determinants of loan repayment and insurance purchase. The relationship is stronger in magnitude for new borrowers’ first loan than for their second loan, and in several situations in which borrowers would have a higher incentive to signal their creditworthiness. We interpret this evidence as borrowers signaling their creditworthiness (or quality) by purchasing costly insurance in an environment subject to a high level of information asymmetries and devoid of credible tools to demonstrate creditworthiness.
    Print ISSN: 0305-750X
    Topics: Geography , Political Science , Sociology
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    Publication Date: 2018-02-22
    Description: Publication date: June 2018 Source: World Development, Volume 106 Author(s): Geoffrey Swenson Strengthening the rule of law and promoting access to justice in developing countries have been longstanding international policy objectives. However, the standard policy tools, such as technical assistance and material aid, are routinely criticized for failing to achieve their objectives. The rare exception is paralegal aid, which is almost universally lauded by policymakers and scholars as effective in promoting the rule of law and access to justice. This belief, however, rests on a very limited empirical foundation regarding what paralegal programs accomplish and under what theory they operate. This paper critically examines the conventional wisdom surrounding paralegal initiatives through case studies of two successful paralegal programs in post-conflict Timor-Leste that are broadly representative of the type of initiatives commonly implemented in developing countries. These programs did improve access to justice services, bolster choice between dispute resolution forums, and increase local knowledge of progressive norms on human rights and women’s rights. Yet, as this article shows, even successful programs can expect to achieve only incremental gains in promoting the rule of law because advances largely depend on alignment with the priorities of powerful state and non-state actors, donors, program implementers, and paralegals themselves. To date, the literature has not acknowledged these limitations. This article addresses this gap by demonstrating that paralegal aid faces multiple challenges that mean paralegals cannot necessarily transcend or modify deep seated norms and power structures. These issues include principal agent-problems due to the extensive delegation required, internal limitations resulting from paralegals’ limited authority and independence, and external constraints from state and non-state justice actors. Paralegal programs also face program design, implementation, and sustainability challenges. Consequently, scholars, practitioners, and policymakers need to adopt a more balanced view of paralegal aid.
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    Topics: Geography , Political Science , Sociology
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    Publication Date: 2018-02-22
    Description: Publication date: Available online 21 February 2018 Source: Journal of Air Transport Management Author(s): Jovana Kuljanin, Mira Paskota, Milica Kalić The paper develops an integrated multivariate statistical model which can be used as a methodological framework for investigation the factors affecting the airline choice in rapidly growing air travel markets such as those in the Central (CE) and South-East Europe (SEE) countries. The methodological framework consisting of three multivariate statistical techniques (Principal Component Analysis, Canonical Correlation Analysis and Discriminant Analysis) are applied to data (766 passengers) collected at Belgrade Airport on the routes where there is competition between a full-service and a low-cost carrier to investigate the determinants affecting airline choice. The results reveal that passenger perceptions are significantly different across airline type and usage frequencies. Although a number of managerial implications stem from the applications of the methods, the results reveal the major finding that western concept of value added and purchasing decision making concept tend to be a ”complete mystery” for CE and SEE passengers due to its historical legacy.
    Print ISSN: 0969-6997
    Electronic ISSN: 1873-2089
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    Publication Date: 2018-02-22
    Description: Publication date: February 2018 Source: Journal of Hydrology: Regional Studies, Volume 15 Author(s): C. Berndt, U. Haberlandt Study region Region in Lower Saxony (North Germany) covered by the measuring range of the weather radar device located near Hanover (approx. 50.000 m 2 ). Study focus This study investigates the performance of various spatial interpolation techniques for climate variables. Meteorological observations are usually recorded as site-specific point information by weather stations and estimation accuracy for unobserved locations depends generally on station density, temporal resolution, spatial variation of the variable and choice of interpolation method. This work aims to evaluate the influence of these factors on interpolation performance of different climate variables. A cross validation analysis was performed for precipitation, temperature, humidity, cloud coverage, sunshine duration, and wind speed observations. Hourly to yearly temporal resolutions and different additional information were considered. New hydrological insights Geostatistical techniques provide a better performance for all climate variables compared to simple methods Radar data improves the estimation of rainfall with hourly temporal resolution, while topography is useful for weekly to yearly values and temperature in general. No helpful information was found for cloudiness, sunshine duration, and wind speed, while interpolation of humidity benefitted from additional temperature data. The influences of temporal resolution, spatial variability, and additional information appear to be stronger than station density effects. High spatial variability of hourly precipitation causes the highest error, followed by wind speed, cloud coverage and sunshine duration. Lowest errors occur for temperature and humidity.
    Print ISSN: 2214-5818
    Topics: Architecture, Civil Engineering, Surveying , Geography , Geosciences
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    Publication Date: 2018-02-22
    Description: Publication date: Available online 20 February 2018 Source: Journal of Transport Geography Author(s): Jorge Blanco, Karen Lucas, Alex Schafran, Ersilia Verlinghieri, Ricardo Apaolaza
    Print ISSN: 0966-6923
    Electronic ISSN: 1873-1236
    Topics: Architecture, Civil Engineering, Surveying
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    Publication Date: 2018-02-02
    Description: Publication date: Available online 31 January 2018 Source: Developmental Biology Author(s): Terren K. Niethamer, Jeffrey O. Bush In vertebrates, the Eph/ephrin family of signaling molecules is a large group of membrane-bound proteins that signal through a myriad of mechanisms and effectors to play diverse roles in almost every tissue and organ system. Though Eph/ephrin signaling has functions in diverse biological processes, one core developmental function is in the regulation of cell position and tissue morphology by regulating cell migration and guidance, cell segregation, and boundary formation. Often, the role of Eph/ephrin signaling is to translate patterning information into physical movement of cells and changes in morphology that define tissue and organ systems. In this review, we focus on recent advances in the regulation of these processes, and our evolving understanding of the in vivo signaling mechanisms utilized in distinct developmental contexts.
    Print ISSN: 0012-1606
    Electronic ISSN: 1095-564X
    Topics: Biology
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    Publication Date: 2018-02-02
    Description: Publication date: Available online 31 January 2018 Source: Developmental Biology Author(s): Aidan Dineen, Erin Osborne Nishimura, Barbara Goszczynski, Joel H. Rothman, James D. McGhee The two GATA transcription factors ELT-2 and ELT-7 function in the differentiation of the C. elegans intestine. ELT-2 loss causes lethality. ELT-7 loss causes no obvious phenotype but enhances the elt-2(-) intestinal phenotype. Thus, ELT-2 and ELT-7 appear partially redundant, with ELT-2 being more influential. To investigate the different regulatory roles of ELT-2 and ELT-7, we compared the transcriptional profiles of pure populations of wild-type, elt-2(-) , elt-7(-) , and elt-7(-); elt-2(-) double mutant L1-stage larvae. Consistent with the mutant phenotypes, loss of ELT-2 had a >25 fold greater influence on the number of significantly altered transcripts compared to the loss of ELT-7; nonetheless, the levels of numerous transcripts changed upon loss of ELT-7 in the elt-2(-) background. The quantitative responses of individual genes revealed a more complicated behaviour than simple redundancy/partial redundancy. In particular, genes expressed only in the intestine showed three distinguishable classes of response in the different mutant backgrounds. One class of genes responded as if ELT-2 is the major transcriptional activator and ELT-7 provides variable compensatory input. For a second class, transcript levels increased upon loss of ELT-2 but decreased upon further loss of ELT-7, suggesting that ELT-7 actually overcompensates for the loss of ELT-2. For a third class, transcript levels also increased upon loss of ELT-2 but remained elevated upon further loss of ELT-7, suggesting overcompensation by some other intestinal transcription factor(s). In spite of its minor loss-of-function phenotype and its limited sequence similarity to ELT-2, ELT-7 expressed under control of the elt-2 promoter is able to rescue elt-2(-) lethality. Indeed, appropriately expressed ELT-7, like appropriately expressed ELT-2, is able to replace all other core GATA factors in the C. elegans endodermal pathway. Overall, this study focuses attention on the quantitative intricacies behind apparent redundancy or partial redundancy of two related transcription factors.
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    Publication Date: 2018-02-02
    Description: Publication date: Available online 31 January 2018 Source: Energy Economics Author(s): Sydnei Marssal de Oliveira, Celma de Oliveira Ribeiro, Maria Paula Vieira Cicogna The use of food crops to produce biofuels has been subject of interest in literature. The relationship between food and fuel prices can remarkably affect production strategies. These prices are subject to high uncertainty and producers must adopt hedging and storage strategies in order to avoid financial losses. This study investigates the effect of uncertainty on production, storage and hedging of ethanol and sugar in Brazilian mills. A robust optimization model to define production, storage and hedging strategies is proposed. Uncertainty sets on returns are constructed based on a state space model (Kalman Filter). The presented model was applied to Brazilian ethanol and sugar markets in different economic scenarios. The study analyses efficient frontiers and optimal strategies and the results indicate that, even adopting good price forecast models, the optimal strategies can be deeply affected by uncertainty.
    Print ISSN: 0140-9883
    Electronic ISSN: 1873-6181
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Economics
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    Publication Date: 2018-02-02
    Description: Publication date: Available online 31 January 2018 Source: Energy Economics Author(s): Akram Shavkatovich Hasanov, Wai Ching Poon, Ajab Al-Freedi, Zin Yau Heng The need for research on commodity volatility has grown considerably due to the important role and financialization of commodities in global asset markets. This paper examines the volatility forecasting performance of a wide variety of GARCH-based models in the context of biofuel feedstock markets in the presence of structural breaks. Our sample is also extended to several non-renewable energy commodities to evaluate comparatively the volatility forecasting performance across various commodity markets. The model specifications allow for different conditional distribution functions in the rolling window estimations. A break detection algorithm finds significant evidence of structural breaks in the unconditional variance of all commodity returns under study. The out-of-sample analysis, which is based on an up-to-date model comparison testing procedure, reveals that volatility models accommodating structural breaks in the data provide the best volatility forecasts for most cases. Regarding the relevance of distribution functions, the skewed normal distribution dominates in the model confidence sets. Nevertheless, the complex distribution functions do not always outperform simpler ones, although true return distribution is asymmetric and heavy-tailed.
    Print ISSN: 0140-9883
    Electronic ISSN: 1873-6181
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Economics
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    Elsevier
    Publication Date: 2018-02-02
    Description: Publication date: Available online 31 January 2018 Source: Energy Economics Author(s): Afees A. Salisu, Idris Ademuyiwa, Kazeem O. Isah In this paper, we propose a revision to the traditional (demand side) Phillips curve to capture the supply (cost-push) side of inflation. We adopt the Westerlund and Narayan [WN] (2015) approach which accounts for persistence, endogeneity and conditional heteroscedasticity effects in the predictive regression model. In addition, following the approach of Salisu and Isah (2018), we extend the oil-based bivariate framework of WN (2015) to a multi-predictor set-up in order to augment the traditional Phillips curve-based inflation model with the proposed cost-push factor. Using the OECD countries, we demonstrate that the forecast performance of the traditional Phillips curve tends to improve when it is augmented with oil price both for the in-sample and out-of-sample forecasts. Contrary to the prominent findings in the literature, the augmented Phillips curve model outperforms the first order autoregressive model. Our results are robust to alternative measures of inflation rate and different forecast horizons.
    Print ISSN: 0140-9883
    Electronic ISSN: 1873-6181
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Economics
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    Elsevier
    Publication Date: 2018-02-02
    Description: Publication date: Available online 31 January 2018 Source: Energy Economics Author(s): Jian-Lei Mo, Joachim Schleich, Ying Fan Carbon capture and storage (CCS) is considered a key technology option for abating CO 2 emissions in carbon-intensive sectors, e.g. the power sector. However, high investment costs and risk hinder the diffusion of CCS. To avoid stranded assets or high future costs for retrofitting, new plants can be made carbon capture ready (CCR) to enable them to accommodate future CCS retrofitting at low additional costs. Current CCR investment decisions are closely related to future CCS retrofitting and CCS operation decisions in subsequent stages, all of which would be affected by uncertainties. We develop a three-stage CCR investment decision model under multiple uncertainties which allows for investment and especially operating flexibilities. Applying this model to China shows that CCS operating flexibility under the carbon-pricing scheme may actually lower the probability of investing in a CCR plant, and neglecting it may overestimate the propensity for investing in CCR. Moreover, learning effects, which reduce the costs of future CCS retrofitting, may be detrimental to CCR investment, indicating that the policy support for research on, development of, and deployment of CCS to reduce CCS costs should be coordinated with CCR investments. Although higher electricity prices can increase the value of an investment opportunity, it may restrain CCR investment. Finally, CCR investment does not appear to be economically viable under current conditions in China because of low carbon prices, high carbon price risks, high CCR investment costs and the high opportunity costs of CCS operation.
    Print ISSN: 0140-9883
    Electronic ISSN: 1873-6181
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Economics
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    Elsevier
    Publication Date: 2018-02-23
    Description: Publication date: Available online 21 February 2018 Source: Computers & Operations Research Author(s): Weishi Shao, Dechang Pi, Zhongshi Shao This paper proposes a hybrid discrete teaching-learning based meta-heuristic (HDTLM) to solve the no-idle flow shop scheduling problem (NIFSP) with the total tardiness criterion. To imitate the teaching-learning phenomenon in the real world, the HDTLM is composed of three phases, i.e . discrete teaching phase based on probabilistic model, discrete learning phase based on hierarchical structure, and reinforcement learning. In the discrete teaching phase, a probabilistic model based on the elite learners and the best learner is used to generate a series of position sequences, and the concept of consensus permutation is employed to replace the mean individual in the teaching-learning based optimization (TLBO) algorithm. Each job of the consensus permutation is inserted into a new sequence according to the position sequence. In the discrete learning phase, according to different levels of learners, all learners are divided into three layers, i.e . top layer, middle layer, bottom layer, and then the proposed learning phase adopts the order of top-down to spread the knowledge. The reinforcement learning phase is applied to the best learner to further improve the knowledge level of teacher. The parameters of the HDTLM are calibrated by a design of experiments (DOE) on randomly generated testing instances. The computational results on Taillard and Ruiz's benchmark sets and statistical analyses show that the HDTLM is an efficient and effective method for solving the NIFSP.
    Print ISSN: 0305-0548
    Electronic ISSN: 1873-765X
    Topics: Mathematics , Economics
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    Elsevier
    Publication Date: 2018-02-23
    Description: Publication date: Available online 21 February 2018 Source: Computers & Operations Research Author(s): C. Hu, J. Lu, X. Liu, G. Zhang Due to an increase in customer-oriented service strategies designed to meet more complex and exacting customer requirements, meeting a scheduled time window has become an important part of designing vehicle routes for logistics activities. However, practically, the uncertainty in travel times and customer demand often means vehicles miss these time windows, increasing service costs and decreasing customer satisfaction. In an effort to find a solution that meets the needs of real-world logistics, we examine the vehicle routing problem with hard time windows under demand and travel time uncertainty. To address the problem, we build a robust optimization model based on novel route-dependent uncertainty sets. However, due to the complex nature of the problem, the robust model is only able to tackle small-sized instances using standard solvers. Therefore, to tackle large instances, we design a two-stage algorithm based on a modified adaptive variable neighborhood search heuristic. The first stage of the algorithm minimizes the total number of vehicle routes, while the second stage minimizes the total travel distance. Extensive computational experiments are conducted with modified versions of Solomon’s benchmark instances. The numerical results show that the proposed two-stage algorithm is able to find optimal solutions for small-sized instances and good-quality robust solutions for large-sized instances with little increase to the total travel distance and/or the number of vehicles used. A detailed analysis of the results also reveals several managerial insights for decision-makers in the logistics industry.
    Print ISSN: 0305-0548
    Electronic ISSN: 1873-765X
    Topics: Mathematics , Economics
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    Elsevier
    Publication Date: 2018-02-23
    Description: Publication date: Available online 21 February 2018 Source: Developmental Biology Author(s): Shuai Zhang, Zhibin Fan, Ping Qiao, Yinsuo Zhao, Yanan Wang, Da Jiang, Xiangming Wang, Xiaojuan Zhu, Yu Zhang, Baiqu Huang, Jun Lu, Xiaoxue Li A deficit of GABA (γ-aminobutyric acid) transmission will lead to epilepsy and other cognitive disorders. Recent evidence has shown that neuronal miRNAs affect various synapses, including GABAergic synapses. However, the miRNAs that control GABAergic synapses remain not fully understood. Here, we identified miR-51, a member of Caenorhabditis elegans miR-99/100 family, as a key regulator of GABAergic synapses. Loss of mir-51 increased PTZ (Pentylenetetrazole) and aldicarb hypersensitivities, and decreased the number of GABAergic synapses and abundance of GABA A receptors. A Rab guaninenucleotide exchange factor (GEF) GLO-4, a well-known component in lysosomal trafficking-related GLO-4/GLO-1/AP-3 (GLO/AP-3) pathway, was discovered to be the direct target of miR-51. Rescue experiments showed that GLO-4 expressed in GABAergic motor neurons functioned as a suppressor of miR-51. Disruption of glo-1 or AP-3 gene apm-3 attenuated the defects of GABAergic synapse in mir-51 mutants, suggesting miR-51 regulated GABAergic synapses through GLO/AP-3 pathway. The present study implies the essential roles of miRNAs on the nervous pathologies characterized by mis-regulated GABA signaling, such as epilepsy.
    Print ISSN: 0012-1606
    Electronic ISSN: 1095-564X
    Topics: Biology
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    Elsevier
    Publication Date: 2018-02-23
    Description: Publication date: June 2018 Source: Ecological Economics, Volume 148 Author(s): Yudi Wahyudin, Tridoyo Kusumastanto, Luky Adrianto, Yusli Wardiatno The objective of this research was to map the social ecological system (SES) of recreational fishing in the seagrass meadow conservation area on the east coast of Bintan Island, Indonesia. This mapping was conducted to determine the ecosystem services provided by seagrass habitat in the study area; that is Berakit, Malang Rapat and Teluk Bakau villages. The results of this research show the seagrass ecosystem in the study area provides significant value within the socio-economic framework of the coastal communities in surrounding areas, due to the existence of recreational fishing activity within seagrass habitat. The existence of this recreational fishing may provide direct and indirect economic impacts and induce demand, based on how the economic value of the seagrass ecosystem is distributed, so that the purchasing power of the coastal communities in surrounding areas is strengthened. We hope that this SES mapping may support considerations to protect the seagrass ecosystem and local economic development related to the recreational fishing in the seagrass conservation area.
    Print ISSN: 0921-8009
    Electronic ISSN: 1873-6106
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Economics
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    Elsevier
    Publication Date: 2018-02-22
    Description: Publication date: April 2018 Source: Solar Energy, Volume 164 Author(s): Savas Ozturk, Levent Aydin, Nilay Kucukdogan, Erdal Celik The thinning of the silicon wafers and the smoothening of the surface are carried out by grinding and lapping processes. The lapping process is especially preferred to produce less surface damage of the silicon wafer in the production of high-efficiency solar cells. In this process, the surface roughness of the sample is the most influential parameter of pressure, rotation speed, lapping time and solution characteristics. In this study, rotation speed and lapping time were determined as design variables in the lapping processes of wire-sawn silicon wafers of 105 mm in diameter using a lapping and polishing machine. Although there are many studies about surface preparation in lapping process, the studies investigating this issue with theoretical or statistical modeling are very few in the literature. In addition, as a similar engineering process, many studies on the cutting process are available including experimental, modeling and optimization sections, which provides a good realistic design and prediction capability for the phenomenon. A similar study also needs to be done for the lapping process, which is especially preferred for the preparation of the surfaces of sensitive materials. The present study was conducted to fill this gap. In order to optimize the lapping parameters with a success, firstly, multiple nonlinear regression analyzes of experimental data were performed in terms of process parameters. Secondly, optimization studies were carried out based on Differential Evaluation, Nelder-Mead, Random Search and Simulated Annealing algorithms with the proposed regression models. It can be concluded that the present paper introduces significance of collaboration on the surface roughness experimental-modeling-optimization triple in silicon wafer lapping process for photovoltaic applications.
    Print ISSN: 0038-092X
    Topics: Energy, Environment Protection, Nuclear Power Engineering
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    Elsevier
    Publication Date: 2018-02-22
    Description: Publication date: April 2018 Source: Solar Energy, Volume 164 Author(s): Christopher W. Frank, Sabrina Wahl, Jan D. Keller, Bernhard Pospichal, Andreas Hense, Susanne Crewell One of the major challenges during the transition phase of the energy system is to maintain the balance between energy supply and demand. Rising questions are often related to site mapping, variability, extremes and compensation effects for example. A fundamental source of information to answer these questions are high quality data sets of renewable energy related variables. As reanalyses provide all relevant data to assess wind and solar power generation over a long period of time (decades) in a gridded consistent way, they exhibit great potential in the field of renewable energy. A new regional reanalysis is COSMO-REA6, which covers the European domain over the years 1995–2014 with a horizontal resolution of about 6 km and a temporal resolution of 15 min. In this paper, we first assess the quality of the Global Horizontal Irradiance (GHI) provided by COSMO-REA6. High quality GHI measurements obtained through the Baseline Surface Radiation Network (BSRN) are used as reference and reveal systematic short comings in the reanalysis: (1) an underestimation of GHI in clear sky situations and (2) an overestimation of GHI in cloudy sky situations. In order to reduce these systematic regime dependent biases, a post-processing is developed. The applied post-processing method is a scaling based on orthogonal distance regressions for two different regimes, i.e., “clear sky” and “cloudy sky”. The two regimes are distinguished by the use of a transmissivity threshold. The post-processed GHI shows a significant reduction of the systematic biases and an improvement in representing the marginal distributions. A spatial cross-validation shows the applicability to the whole model domain of COSMO-REA6. Moreover, COSMO-REA6 as well as the post-processed GHI data reveal an added-value when compared to global reanalysis ERA-Interim and MERRA-2. The higher resolution reanalysis exhibits a significantly better performance of representing GHI variability, as well as biases, RMSE and other conventional scores. The post-processed GHI data are freely available for download.
    Print ISSN: 0038-092X
    Topics: Energy, Environment Protection, Nuclear Power Engineering
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    Elsevier
    Publication Date: 2018-02-22
    Description: Publication date: April 2018 Source: Transportation Research Part A: Policy and Practice, Volume 110 Author(s): Kum Fai Yuen, Hui Shan Loh, Qingji Zhou, Yiik Diew Wong The ability to motivate and retain seafarers is a critical manpower issue in view of global labour shortage and high turnover rate among seafarers. The objective of this paper is to analyse the core determinants of job satisfaction and performance of seafarers. A survey was administered on 116 seafaring officers and the obtained data were analysed using structural equation modelling. The results show that job satisfaction is considerably correlated with job performance of seafarers. In addition, the amount of stress associated with working onboard a ship and attractiveness of rewards are key determinants of job satisfaction. The dispositions of seafarers and appeal of the job design also have considerable impacts on job satisfaction. Based on literature review and post-survey interviews, a management model consisting of policies and strategies to motivate and retain seafarers is proposed.
    Print ISSN: 0965-8564
    Electronic ISSN: 1879-2375
    Topics: Architecture, Civil Engineering, Surveying
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    Elsevier
    Publication Date: 2018-02-24
    Description: Publication date: Available online 22 February 2018 Source: Climate Risk Management Author(s): Trisha Shrum, William Travis, Travis Williams, Evan Lih Ranching involves complex decision-making and risk management in the face of uncertainty about climate conditions. The profitability and sustainability of ranching depend heavily on sufficient and timely rainfall for rangeland forage production. As a result, ranchers may either adopt conservative long-term stocking strategies as a hedge against drought or practice a more dynamic approach in which they vary stocking rates and supplemental feed in response to drought. Yet, some strategies require more information about climate risks than is often available to ranchers. We review the literature to draw out the drought management options as well as the tools and products for drought monitoring and early warning that are available to ranchers. We find that a large gap remains between the information needs of ranchers seeking to adapt dynamically to drought and the information that is available. Moreover, even when actionable information is available, it is unclear whether ranchers are optimally incorporating that information into their risk management decisions. Further research is needed to understand how to package existing information into risk management decision tools in a way that addresses cognitive and operational barriers to support timely decisions that will reduce the impact of drought on profits and the long-term sustainability of rangelands. Due to the multi-faceted nature of climate risk management in ranching, further study of ranching behavior and decisions has the potential to bring new insights into climate risk management and decision and risk theory far beyond the field of ranching and agriculture.
    Electronic ISSN: 2212-0963
    Topics: Energy, Environment Protection, Nuclear Power Engineering
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    Elsevier
    Publication Date: 2018-02-24
    Description: Publication date: April 2018 Source: Data in Brief, Volume 17 Author(s): Jitrayut Jitonnom The data presented in this paper are related to the research article entitled “QM/MM modeling of the hydrolysis and transfructosylation reactions of fructosyltransferase from Aspergillus japonicas , an enzyme that produces prebiotic fructooligosaccharide” (Jitonnom et al., 2018) [1]. This paper presents the procedure and data for characterizing the whole relative energy profiles of hydrolysis and transglycosylation reactions whose elementary steps differ in chemical composition. The data also reflects the choices of the QM cluster model, the functional/basis set method and the equations in determining the reaction energetics.
    Print ISSN: 2352-3409
    Topics: Biology
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    Elsevier
    Publication Date: 2018-02-24
    Description: Publication date: April 2018 Source: Data in Brief, Volume 17 Author(s): Linghao He, Bingbing Cui, Jiameng Liu, Yingpan Song, Minghua Wang, Donglai Peng, Zhihong Zhang In this data article, the chemical data of hollow carbon spheres and polyaniline (HCS@PANI) nanocomposite are presented for the research article entitled “Novel electrochemical biosensor based on core-shell nanostructured composite of hollow carbon spheres and polyaniline for sensitively detecting malathion” (He et al., 2018) [1] . The data includes chemical structure and components obtained by Raman spectra, X-ray photoelectron spectroscopy (XPS), and nitrogen adsorption and desorption isotherms.
    Print ISSN: 2352-3409
    Topics: Biology
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