WILBERT

Wildauer Bücher+E-Medien Recherche-Tool

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Articles  (7,012,327)
Collection
Years
  • 1
    facet.materialart.
    Royal Society of Chemistry (RSC)
    Publication Date: 2018-08-04
    Description: Soft Matter , 2018, Accepted Manuscript DOI : 10.1039/C8SM01383G, Paper Dawei Zhang, Qingkun Liu, RAYSHAN VISVANATHAN, Michael Tuchband, Ghadah Sheetah, Benjamin Fairbanks, Noel A Clark, Ivan Smalyukh, Christopher N Bowman An artificial nucleolipid containing thymine, a triazole-ring, and phosphotidylcholine moieties (TTPC) was prepared through copper catalyzed azide alkyne cycloaddition (CuAAC) under aqueous conditions. The resulting TTPC molecules assembled in-situ into... The content of this RSS Feed (c) The Royal Society of Chemistry
    Print ISSN: 1744-683X
    Electronic ISSN: 1744-6848
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 2
    facet.materialart.
    MDPI Publishing
    In: Sensors
    Publication Date: 2018-08-04
    Description: Sensors, Vol. 18, Pages 2538: A New Variational Bayesian Adaptive Extended Kalman Filter for Cooperative Navigation Sensors doi: 10.3390/s18082538 Authors: Sun Zhang Wang Gao To solve the problem of unknown state noises and uncertain measurement noises inherent in underwater cooperative navigation, a new Variational Bayesian (VB)-based Adaptive Extended Kalman Filter (VBAEKF) for master–slave Autonomous Underwater Vehicles (AUV) is proposed in this paper. The Inverse Wishart (IW) distribution is used to model the predicted error covariance and measurement noise covariance matrix. The state, together with the predicted error covariance and measurement noise covariance matrix, can be adaptively estimated based on VB approximation. The performance of the proposed algorithm is demonstrated through a lake trial, which shows the advantage of the proposed algorithm.
    Electronic ISSN: 1424-8220
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 3
    facet.materialart.
    MDPI Publishing
    In: Sensors
    Publication Date: 2018-08-04
    Description: Sensors, Vol. 18, Pages 2539: Efficient Force Control Learning System for Industrial Robots Based on Variable Impedance Control Sensors doi: 10.3390/s18082539 Authors: Chao Li Zhi Zhang Guihua Xia Xinru Xie Qidan Zhu Learning variable impedance control is a powerful method to improve the performance of force control. However, current methods typically require too many interactions to achieve good performance. Data-inefficiency has limited these methods to learn force-sensitive tasks in real systems. In order to improve the sampling efficiency and decrease the required interactions during the learning process, this paper develops a data-efficient learning variable impedance control method that enables the industrial robots automatically learn to control the contact force in the unstructured environment. To this end, a Gaussian process model is learned as a faithful proxy of the system, which is then used to predict long-term state evolution for internal simulation, allowing for efficient strategy updates. The effects of model bias are reduced effectively by incorporating model uncertainty into long-term planning. Then the impedance profiles are regulated online according to the learned humanlike impedance strategy. In this way, the flexibility and adaptivity of the system could be enhanced. Both simulated and experimental tests have been performed on an industrial manipulator to verify the performance of the proposed method.
    Electronic ISSN: 1424-8220
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 4
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-08-04
    Description: Sustainability, Vol. 10, Pages 2751: Mapping Agroecology in Europe. New Developments and Applications Sustainability doi: 10.3390/su10082751 Authors: Alexander Wezel Stéphane Bellon Agroecology has gradually developed in recent decades, but has only recently been more strongly promoted by different movements, organizations, institutions, farmer groups, and scholars.[...]
    Electronic ISSN: 2071-1050
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 5
    facet.materialart.
    MDPI Publishing
    In: Sensors
    Publication Date: 2018-08-04
    Description: Sensors, Vol. 18, Pages 2537: An Electrochemiluminescence Sensor Based on Nafion/Magnetic Fe3O4 Nanocrystals Modified Electrode for the Determination of Bisphenol A in Environmental Water Samples Sensors doi: 10.3390/s18082537 Authors: Jiye Chai Xinru Yu Jian Zhao Aili Sun Xizhi Shi Dexiang Li The well-dispersive and superparamagnetic Fe3O4-nanocrystals (Fe3O4-NCs) which could significantly enhance the anodic electrochemiluminescence (ECL) behavior of luminol, were synthesized in this study. Compared to ZnS, ZnSe, CdS and CdTe nanoparticles, the strongest anodic ECL signals were obtained at +1.6 V on the Fe3O4-NCs coated glassy carbon electrode. The ECL spectra revealed that the strong ECL resonance energy transfer occurred between luminol and Fe3O4-NCs. Furthermore, under the optimized ECL experimental conditions, such as the amount of Fe3O4-NCs, the concentration of luminol and the pH of supporting electrolyte, BPA exhibited a stronger distinct ECL quenching effect than its structural analogs and a highly selective and sensitive ECL sensor for the determination of bisphenol A (BPA) was developed based on the Fe3O4-NCs. A good linear relationship was found between the ECL intensity and the increased BPA concentration within 0.01–5.0 mg/L, with a correlation coefficient of 0.9972. The detection limit was 0.66 × 10−3 mg/L. Good recoveries between 96.0% and 105.0% with a relative standard deviation of less than 4.8% were obtained in real water samples. The proposed ECL sensor can be successfully employed to BPA detection in environmental aqueous samples.
    Electronic ISSN: 1424-8220
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 6
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-08-04
    Description: Sustainability, Vol. 10, Pages 2750: The Santa Barbara Oil Spill and Its Effect on United States Environmental Policy Sustainability doi: 10.3390/su10082750 Authors: Teresa Sabol Spezio The National Environmental Policy Act of 1970 (NEPA) paved the way for comprehensive federal environmental policy in the United States. NEPA has successfully allowed citizens and others to become active participants in the environmental decision-making process for federal infrastructure projects throughout the evolution of environmental policy in the United States. Its efficacy was enhanced because of an oil spill off the Santa Barbara coast in January 1969. This disaster gave the framers of NEPA an example of the consequences of the lack of environmental policy in federal decision making. Using their original proactive approach along with the reactive response to the spill, they created a policy that has can be seen as a foundation for 21st century sustainability and resilience programs.
    Electronic ISSN: 2071-1050
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 7
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-08-04
    Description: Sustainability, Vol. 10, Pages 2748: A Cradle to Handover Life Cycle Assessment of External Walls: Choice of Materials and Prognosis of Elements Sustainability doi: 10.3390/su10082748 Authors: Diana Carolina Gámez-García José Manuel Gómez-Soberón Ramón Corral-Higuera Héctor Saldaña-Márquez María Consolación Gómez-Soberón Susana Paola Arredondo-Rea This research focuses on a comparison of 20 external wall systems that are conventionally used in Spanish residential buildings, from a perspective based on the product and construction process stages of the life cycle assessment. The primary objective is to provide data that allow knowing the environmental behavior of walls built with materials and practices conventionally. This type of analysis will enable promoting the creation of regulations that encourage the use of combinations of materials that generate the most environmentally suitable result, and in turn, contribute to the strengthening of the embodied stages study of buildings and their elements. The results indicate that the greatest impact arises in the product stage (90.9%), followed by the transport stage (8.9%) and the construction process stage (<1%). Strategies (such as the use of large-format pieces and the controlled increase in thickness of the thermal insulation) can contribute to reducing the environmental impact; on the contrary, practices such as the use of small-format pieces and laminated plasterboard can increase the environmental burden. The prediction of the environmental behavior (simulation equation) allows these possible impacts to be studied in a fast and simplified way.
    Electronic ISSN: 2071-1050
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 8
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-08-04
    Description: Sustainability, Vol. 10, Pages 2749: Morphological Precision Assessment of Reconstructed Surface Models for a Coral Atoll Lagoon Sustainability doi: 10.3390/su10082749 Authors: Qi Wang Fenzhen Su Yu Zhang Huiping Jiang Fei Cheng In addition to remote-sensing monitoring, reconstructing morphologic surface models through interpolation is an effective means to reflect the geomorphological evolution, especially for the lagoons of coral atolls, which are underwater. However, which interpolation method is optimal for lagoon geomorphological reconstruction and how to assess the morphological precision have been unclear. To address the aforementioned problems, this study proposed a morphological precision index system including the root mean square error (RMSE) of the elevation, the change rate of the local slope shape (CRLSS), and the change rate of the local slope aspect (CRLSA), and introduced the spatial appraisal and valuation approach of environment and ecosystems (SAVEE). In detail, ordinary kriging (OK), inverse distance weighting (IDW), radial basis function (RBF), and local polynomial interpolation (LPI) were used to reconstruct the lagoon surface models of a typical coral atoll in South China Sea and the morphological precision of them were assessed, respectively. The results are as follows: (i) OK, IDW, and RBF exhibit the best performance in terms of RMSE (0.3584 m), CRLSS (51.43%), and CRLSA (43.29%), respectively, while with insufficiently robust when considering all three aspects; (ii) IDW, LPI, and RBF are suitable for lagoon slopes, lagoon bottoms, and patch reefs, respectively; (iii) The geomorphic decomposition scale is an important factor that affects the precision of geomorphologic reconstructions; and, (iv) This system and evaluation approach can more comprehensively consider the differences in multiple precision indices.
    Electronic ISSN: 2071-1050
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 9
    facet.materialart.
    MDPI Publishing
    In: Sensors
    Publication Date: 2018-08-07
    Description: Sensors, Vol. 18, Pages 2574: Modeling and Control of a Micro AUV: Objects Follower Approach Sensors doi: 10.3390/s18082574 Authors: Jesus Arturo Monroy-Anieva Cyril Rouviere Eduardo Campos-Mercado Tomas Salgado-Jimenez Luis Govinda Garcia-Valdovinos This work describes the modeling, control and development of a low cost Micro Autonomous Underwater Vehicle (μ-AUV), named AR2D2. The main objective of this work is to make the vehicle to detect and follow an object with defined color by means of the readings of a depth sensor and the information provided by an artificial vision system. A nonlinear PD (Proportional-Derivative) controller is implemented on the vehicle in order to stabilize the heave and surge movements. A formal stability proof of the closed-loop system using Lyapunov’s theory is given. Furthermore, the performance of the μ-AUV is validated through numerical simulations in MatLab and real-time experiments.
    Electronic ISSN: 1424-8220
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 10
    facet.materialart.
    MDPI Publishing
    In: Sensors
    Publication Date: 2018-08-07
    Description: Sensors, Vol. 18, Pages 2573: Screening Method for Anti-Colon Cancer Drugs Using Two Sensor Cell Lines with Human β4-Galactosyltransferase 4 Gene Promoters Sensors doi: 10.3390/s18082573 Authors: Naomichi Fukushima Atena Sugiyama Takeshi Sato The increased expression of β4-galactosyltransferase (β4GalT) 4 is closely associated with poor prognosis of colon cancer. Recently, we showed that the expression of the β4GalT4 gene is regulated by the 0.17 kb core promoter region containing one binding site for Specificity protein 1 (Sp1). To develop a screening method for anti-colon cancer drugs, two sensor cell lines having the luciferase gene under the control of two β4GalT4 gene promoters that differed in length were established from SW480 human colon cancer cells. The hGT4-0.17-sensor cells possessed the luciferase reporter driven by the 0.17 kb promoter, while the hGT4-0.3-sensor cells possessed the luciferase reporter driven by the 0.3 kb promoter containing one binding site each for colon cancer-related transcription factors including activator protein 2, E2F, caudal-related homeobox transcription factors, and Runt-related transcription factors besides Sp1. Upon treatment with mitogen-activated protein kinase signaling inhibitor U0126, the promoter activities of the hGT4-0.3-sensor cells decreased significantly, while those of the hGT4-0.17-sensor cells remained unchanged. These results suggest that the responsiveness to U0126 differs between two sensor cell lines due to the different regulation of the luciferase reporters. This study provides the screening method for anti-colon cancer drugs by the combination of two sensor cell lines.
    Electronic ISSN: 1424-8220
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 11
    facet.materialart.
    MDPI Publishing
    In: Sensors
    Publication Date: 2018-08-07
    Description: Sensors, Vol. 18, Pages 2571: Towards a Meaningful 3D Map Using a 3D Lidar and a Camera Sensors doi: 10.3390/s18082571 Authors: Jongmin Jeong Tae Sung Yoon Jin Bae Park Semantic 3D maps are required for various applications including robot navigation and surveying, and their importance has significantly increased. Generally, existing studies on semantic mapping were camera-based approaches that could not be operated in large-scale environments owing to their computational burden. Recently, a method of combining a 3D Lidar with a camera was introduced to address this problem, and a 3D Lidar and a camera were also utilized for semantic 3D mapping. In this study, our algorithm consists of semantic mapping and map refinement. In the semantic mapping, a GPS and an IMU are integrated to estimate the odometry of the system, and subsequently, the point clouds measured from a 3D Lidar are registered by using this information. Furthermore, we use the latest CNN-based semantic segmentation to obtain semantic information on the surrounding environment. To integrate the point cloud with semantic information, we developed incremental semantic labeling including coordinate alignment, error minimization, and semantic information fusion. Additionally, to improve the quality of the generated semantic map, the map refinement is processed in a batch. It enhances the spatial distribution of labels and removes traces produced by moving vehicles effectively. We conduct experiments on challenging sequences to demonstrate that our algorithm outperforms state-of-the-art methods in terms of accuracy and intersection over union.
    Electronic ISSN: 1424-8220
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 12
    facet.materialart.
    MDPI Publishing
    In: Sensors
    Publication Date: 2018-08-07
    Description: Sensors, Vol. 18, Pages 2569: An X-band Bi-Directional Transmit/Receive Module for a Phased Array System in 65-nm CMOS Sensors doi: 10.3390/s18082569 Authors: Van-Viet Nguyen Hyohyun Nam Young Joe Choe Bok-Hyung Lee Jung-Dong Park We present an X-band bi-directional transmit/receive module (TRM) for a phased array system utilized in radar-based sensor systems. The proposed module, comprising a 6-bit phase shifter, a 6-bit digital step attenuator, and bi-directional gain amplifiers, is fabricated using 65-nm CMOS technology. By constructing passive networks in the phase-shifter and the variable attenuator, the implemented TRM provides amplitude and phase control with 360° phase coverage and 5.625° as the minimum step size while the attenuation range varies from 0 to 31.5 dB with a step size of 0.5 dB. The fabricated T/R module in all of the phase shift states had RMS phase errors of less than 4° and an RMS amplitude error of less than 0.93 dB at 9–11 GHz. The output 1dB gain compression point (OP1dB) of the chip was 5.13 dBm at 10 GHz. The circuit occupies 3.92 × 2.44 mm2 of the chip area and consumes 170 mW of DC power.
    Electronic ISSN: 1424-8220
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 13
    facet.materialart.
    Royal Society of Chemistry (RSC)
    Publication Date: 2018-08-07
    Description: Soft Matter , 2018, Accepted Manuscript DOI : 10.1039/C8SM01221K, Paper Sergio Diez-Berart, Luana Tortora, Daniel Finotello, Blaz Zupancic, Bostjan Zalar, Lisa Green, Oleg D. Lavrentovich Uniaxial order parameters of the nematic and columnar mesophases in the lyotropic chromonic liquid crystal Sunset Yellow FCF have been determined from deuteron nuclear magnetic resonance, where random confinement of... The content of this RSS Feed (c) The Royal Society of Chemistry
    Print ISSN: 1744-683X
    Electronic ISSN: 1744-6848
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 14
    facet.materialart.
    MDPI Publishing
    In: Sensors
    Publication Date: 2018-08-07
    Description: Sensors, Vol. 18, Pages 2567: DIFTOS: A Distributed Infrastructure-Free Traffic Optimization System Based on Vehicular Ad Hoc Networks for Urban Environments Sensors doi: 10.3390/s18082567 Authors: Weidong Zhang Nyothiri Aung Sahraoui Dhelim Yibo Ai Aiming to alleviate traffic congestion, many congestion avoidance and traffic optimization systems have been proposed recently. However, most of them suffer from three main problems. Firstly scalability: they rely on a centralized server, which has to perform intensive communication and computational tasks. Secondly unpredictability: they use smartphones and other sensors to detect the congested roads and warn upcoming vehicles accordingly. In other words, they are used to solve the problem rather than avoiding it. Lastly, infrastructure dependency: they assume the presence of pre-installed infrastructures such as roadside unit (RSU) or cellular 3G/4G networks. Motivated by the above-mentioned reasons, in this paper, we proposed a fully distributed and infrastructure-less congestion avoidance and traffic optimization system for VANET (Vehicular Ad-hoc Networks) in urban environments named DIFTOS (Distributed Infrastructure-Free Traffic Optimization System), in which the city map is divided into a hierarchy of servers. The vehicles that are located in the busy road intersections play the role of servers, thus DIFTOS does not rely on any centralized server and does not need internet connectivity or RSU or any kind of infrastructure. As far as we know, in the literature of congestion avoidance using VANET, DIFTOS is the first completely infrastructure-free congestion avoidance system. The effectiveness and scalability of DIFTOS have been proved by simulation under different traffic conditions.
    Electronic ISSN: 1424-8220
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 15
    facet.materialart.
    Royal Society of Chemistry (RSC)
    Publication Date: 2018-08-07
    Description: Soft Matter , 2018, Accepted Manuscript DOI : 10.1039/C8SM00133B, Paper Viktor Soprunyuk, Wilfried Schranz Dynamic mechanical analysis (DMA) measurements of water in nanoporous silica have been performed as function of temperature and frequency for different pore sizes (2.5 - 10 nm) at heating and... The content of this RSS Feed (c) The Royal Society of Chemistry
    Print ISSN: 1744-683X
    Electronic ISSN: 1744-6848
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 16
    facet.materialart.
    Royal Society of Chemistry (RSC)
    Publication Date: 2018-08-07
    Description: Soft Matter , 2018, Accepted Manuscript DOI : 10.1039/C8SM01179F, Paper Cesare Mikhail Cejas, Lawrence A Hough, Christian Frétigny, Remi Dreyfus Understanding evaporation or drying in granular media still remains complex despite recent advancements. Evaporation depends on liquid transport across a connected film network from the bulk to the surface. In... The content of this RSS Feed (c) The Royal Society of Chemistry
    Print ISSN: 1744-683X
    Electronic ISSN: 1744-6848
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 17
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-08-07
    Description: Sustainability, Vol. 10, Pages 2784: Comment on Apiors, E.K.; Suzuki, A. Mobile Money, Individuals’ Payments, Remittances, and Investments: Evidence from the Ashanti Region, Ghana. Sustainability 2018, 10, 1409 Sustainability doi: 10.3390/su10082784 Authors: Leo Van Hove Using primary, individual-level survey data for Ghana, Apiors and Suzuki find, among other things, that mobile money use is not dependent on financial status and that mobile money users save more. This note argues that both conclusions have validity issues.
    Electronic ISSN: 2071-1050
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 18
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-08-07
    Description: Sustainability, Vol. 10, Pages 2781: Pathways for Sustainable Supply Chain Performance—Evidence from a Developing Country, Malaysia Sustainability doi: 10.3390/su10082781 Authors: Kai-Chong Thong Wai-Peng Wong Malaysia has recently started to adopt sustainable business best practices to benefit companies, environment and stakeholders. Therefore, this study demonstrates pathways to sustainable supply chain triple bottom line performance derived from linkages of institutional pressures (IP) and organizational identity (OI) to environment and social sustainable practices. It shows that the superordinate goal of sustainable supply chain management is met in spite of unyielding external pressures and desirable OI driving the unequivocal environmental and responsible social practices of firms. A survey approach was adopted to gather the data required for this study. A total of 118 completed questionnaires were received from respondents, who were managers and senior executives in supply chain management (SCM) in Malaysia. The data were analyzed using structural equation modeling with partial least squares (PLS-SEM) version 3.0. Our findings showed that all hypothesized relationships are significant except both process- and market-based social practices could not directly impact economic performance. This is in sharp contrast to environmental practices. However, the significant linkage between social practices and social performance is a pathway for the former to economic performance. Therefore, the economic benefits derived from social practices are salvaged through its performance outcomes. The novel and useful impact of institutional pressures on sustainable supply chain practices are also unearthed.
    Electronic ISSN: 2071-1050
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 19
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-08-07
    Description: Sustainability, Vol. 10, Pages 2780: Dynamic Decomposition of Factors Influencing the Export Growth of China’s Wood Forest Products Sustainability doi: 10.3390/su10082780 Authors: Xuping Cao Shuai Yang Xiangmeng Huang Juxi Tong Wood forest products (WFPs) are globally important environmental products, with economic, ecological, and renewable characteristics. China is the world’s largest WFP exporter. However, many factors, such as the downturn of traditional major export markets and the rise of the price of production factors, have generated great challenges and uncertainties for China’s WFP export market. This study improves the product scope of WFPs. The category of WFPs has been expanded to 14 categories and 30 sub-categories, which is more detailed and more developed than in previous literature. Based on the United Nations’ Comtrade Database (COMTRADE), this paper uses the revised constant market share (CMS) model to measure and analyze empirically the factors affecting the export growth of China’s WFPs from the perspective of market, structure, and competitiveness. It is found that (1) the competitive effect exerts the biggest influence on export growth, followed by market size effects, with the effects of market distribution and product structure both being small; (2) wooden furniture, wooden products, plywood, paper, and its products play a main role in enhancing the competitive effect in China’s WFPs; and (3) China’s WFPs have a strong market competitiveness in other markets such as the USA, China Hong Kong, United Kingdom, Japan, Australia, Malaysia, and Singapore. Therefore, it is crucial for China’s WFP market to improve its product structure effects and market distribution effects in order for it to participate in international competition. On the other hand, considering that China’s exports of WFPs mainly consist of resource- and labor-intensive products, the improvement of standards such as the technology level, environmental protection and sustainable development, must not be ignored.
    Electronic ISSN: 2071-1050
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 20
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-08-07
    Description: Sustainability, Vol. 10, Pages 2779: Exploring the Research Trend of Smart Factory with Topic Modeling Sustainability doi: 10.3390/su10082779 Authors: Hyun-Lim Yang Tai-Woo Chang Yerim Choi Growing competition among manufacturing businesses and the advent of the Fourth Industrial Revolution has meant that many countries are conducting various research projects to understand how to introduce and populate smart factories. Smart factories are expected to provide a way of solving the manufacturing industries’ complex problems, to take a role in breakthroughs in factories and to carry on a sustainable business. Smart factories are currently in the introduction stage, so we should follow up on the majorities and check their tendencies. However, smart-factory research is an interdisciplinary field that should be studied by researchers with diverse backgrounds in various domains. Thus, studying the past and present overall research trends of smart factory studies is required for their successful introduction and sustainable research. In this study, we explored the research trends of smart factories in both international and specifically Korean research, as an example of a nation case, to determine the major research directions. We determined trends using latent semantic analysis, which is a known topic-modeling technique, and analyzed the trends with regression-based methods. As a result, we could read the clear trends by analyzing existing studies related to smart factories. In addition, it is possible to compare research trends in Korea and international research trends for the commonly appeared topics, such as ‘ICT’ (Information and Communications Technology) and ‘R&D (Research and Development)/Technology Innovation’. We expect that the quantitative analysis results and suggestions presented in this study can be used to formulate strategies for the future diffusion of smart factories.
    Electronic ISSN: 2071-1050
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 21
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-08-07
    Description: Sustainability, Vol. 10, Pages 2776: Comparative Analysis of Biological Effects Induced on Different Cell Types by Magnetic Fields with Magnetic Flux Densities in the Range of 1–60 mT and Frequencies up to 50 Hz Sustainability doi: 10.3390/su10082776 Authors: Cristian Vergallo Luciana Dini Moderate static magnetic fields (SMFs) are generated from sources such as new-generation electric trams and trains, electric arc welding, and magnetic resonance imaging (MRI) devices, as well as during the industrial production of aluminium, while extremely low frequency pulsed magnetic fields (ELF-PMFs) are produced by house power installations, household appliances, and high voltages transmission lines. Moderate SMFs and ELF-PMFs with magnetic flux densities (B) in the range of 1–60 mT and frequencies (f) up to 50 Hz are common MF exposure sources for the population. Even though humans are continually exposed to these MFs, to date no definitive endpoint has been drawn about their safety. In this review, the state of knowledge about the biological effects induced by these MFs on different cell types will be addressed. In our own observation, the putative modulation of Ca2+/H+ and Na+/H+ plasma membrane antiporters of human peripheral blood lymphocytes (PBLs) was found to occur after a 24 h exposure to a 6 mT SMF, and the bystander effect observed on U937 cells cultivated for up to 6 h in the conditioned medium harvested from human PBLs previously exposed for 24 h to the same MF (secondary necrosis induction) will be also herein discussed.
    Electronic ISSN: 2071-1050
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 22
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-08-07
    Description: Sustainability, Vol. 10, Pages 2777: Sustainability Assurance in Socially-Sensitive Sectors: A Worldwide Analysis of the Financial Services Industry Sustainability doi: 10.3390/su10082777 Authors: Elies Seguí-Mas Fernando Polo-Garrido Helena María Bollas-Araya Sustainability reporting and assurance have considerably increased in the last decades. Among different sectors, ‘sensitive sectors’ attracted the attention of many academics. However, most of research works were focused only on ‘environmentally-sensitive sectors’. Therefore, after the loss of trust caused by the lack of transparency due to the crisis, ‘socially-sensitive sectors’ as financial services sector needs to strengthen users’ confidence in the credibility of their reported activities. The aim of this paper is to assess assurance practices worldwide in one of the main ‘socially-sensitive sectors’: the financial services sector. We study what factors are associated with adoption of assurance and choice of assurance provider, and whether assurance statements differ across providers. Our results reveal that, compared to the global context, companies operating in the financial services sector are more likely to adopt assurance and to choose accountants as assurance providers. Our findings show that adoption of assurance depends on company size. We also found that companies using the financial services sector supplement are more prone to adopt assurance. Our results also evidence that choice of assurance provider depends on the country and listing status Finally, our research shows a great variability in assurance statements across providers.
    Electronic ISSN: 2071-1050
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 23
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-08-07
    Description: Sustainability, Vol. 10, Pages 2773: Measuring and Spatio-Temporal Evolution for the Late-Development Advantage in China’s Provinces Sustainability doi: 10.3390/su10082773 Authors: Fei Ma Fei Liu Qipeng Sun Wenlin Wang Xiaodan Li The coordinated development of regional economies is a major economic goal of many countries around the world. To that end, China has actively carried out a series of strategies to expedite the development of its late-developing regions. This study explores the issues raised by this coordinated development from the perspective of late-development advantages, which refer to a region’s late-development advantages compared with the early-developing regions in the country. The 15 indicators applied for evaluating the late-development advantages fall into five categories including capital, technology, industrial structure, institutions and human resources. Then, the model of entropy-weighted technique for order preference by similarity to an ideal solution (EW-TOPSIS) is applied to evaluate the late-development advantages of China’s provinces. Following this, ArcGIS and GeoDa are used to analyze the spatio-temporal evolution pattern of the late-development advantages of China’s provinces, and to compare the spatio-temporal effect of these advantages between the provinces. The results show that the overall late-development advantages of China’s provinces had a downward trend from 2006 to 2015, with the Eastern Region falling by 8.07%, the Central Region falling by 14.37% and the Western Region falling by 8.05%, indicating that the development gap between China’s Eastern and Western Regions is still large. The temporal effect analysis shows the temporal autocorrelation changes from positive status to negative status with the increase of lagging order, which means the trend of late-development advantage will reverse over time. The spatial effect analysis shows there were only significant Low-Low and Low-High aggregation in 2006 and 2010, but significant High-High and High-Low aggregations emerge in 2012 and 2015, implying that the development environment has effectively promoted the use of the provincial late-development advantage. The research results could provide theoretical basis for the policy making of the accelerating development of late-developing regions in China.
    Electronic ISSN: 2071-1050
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 24
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-08-07
    Description: Sustainability, Vol. 10, Pages 2768: Evaluating Greenhouse Tomato and Pepper Input Efficiency Use in Kosovo Sustainability doi: 10.3390/su10082768 Authors: Blend Frangu Jennie Sheerin Popp Michael Thomsen Arben Musliu Determinants of vegetable production input efficiency affect a Kosovar farmer’s decision to contribute to the agricultural sector. This study evaluates the input efficiency of greenhouse tomato and pepper farms in Kosovo. Using data collected from farm surveys, we conducted an input-oriented data envelopment analysis (DEA) to empirically assess input efficiency. Second, linear regression analysis was used to investigate what farm variables predict greenhouse tomato and pepper technical efficiency (TE). The DEA results indicated that, among the seven regions in Kosovo, Prizren emerged as the most efficient greenhouse tomato-producing region with a mean efficiency of 0.83 (on a scale of 0 to 1.00). Prishtina followed with a mean efficiency of 0.80. In the production of greenhouse peppers, Prishtina was the most efficient region with a mean efficiency of 0.99. Ferizaj followed with a mean efficiency of 0.93. Conclusions about farm characteristics that explain differences in efficiency were sensitive to model specification. Nevertheless, depending on the structural and operational characteristics of the greenhouse tomato and pepper farms, there is an opportunity for the technically inefficient farms and regions to improve their use of inputs.
    Electronic ISSN: 2071-1050
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 25
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-08-07
    Description: Sustainability, Vol. 10, Pages 2766: Outsourcing Performance in Hotels: Evaluating Partnership Quality Sustainability doi: 10.3390/su10082766 Authors: Tomás F. Espino-Rodríguez Juan Carlos Ramírez-Fierro In this study, a research model investigates the influence of various factors of the outsourcing relationship that condition partnership quality. The factors considered as determinants of outsourcing partnership quality are the strategic benefits and the degree of outsourcing. Partnership quality is based on relationships governed by confidence, commitment, business understanding, shared benefits and risks, and conflict resolution. The model also studies the influence of the partnership quality between the supplier and the hotel on the outsourcing performance, considered from the financial, strategic, and overall satisfaction perspectives. To test the hypotheses, this study used the Partial Least Squares (PLS) technique with a sample of managers in an important tourist destination in Spain. The results of the study confirm that the strategic benefits and the degree of outsourcing perceived by the manager are determinant factors of the quality of the outsourcing partnership. In addition, they show that closer relationships with service suppliers imply greater outsourcing performance. Finally, implications for theory and practice are discussed.
    Electronic ISSN: 2071-1050
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 26
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-08-07
    Description: Symmetry, Vol. 10, Pages 323: Temperature-Dependent s± ↔ s++ Transitions in the Multiband Model for Fe-Based Superconductors with Impurities Symmetry doi: 10.3390/sym10080323 Authors: V. A. Shestakov M. M. Korshunov O. V. Dolgov We study the dependence of the superconducting gaps on both the disorder and the temperature within the two-band model for iron-based materials. In the clean limit, the system is in the s± state with sign-changing gaps. Scattering by nonmagnetic impurities leads to the change of the sign of the smaller gap, resulting in a transition from the s± to the s++ state with the sign-preserving gaps. We show here that the transition is temperature-dependent. Thus, there is a line of s±→s++ transition in the temperature–disorder phase diagram. There is a narrow range of impurity scattering rates, where the disorder-induced s±→s++ transition occurs at low temperatures, but then the low-temperature s++ state transforms back to the s± state at higher temperatures. With increasing impurity scattering rate, the temperature of such s++→s± transition shifts to the critical temperature Tc, and only the s++ state is left for higher amounts of disorder.
    Electronic ISSN: 2073-8994
    Topics: Mathematics , Physics
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 27
    facet.materialart.
    EconJournals
    Publication Date: 2018-09-06
    Description: This paper investigated the impact of financial development on energy consumption in Turkey. For this purpose, the annual data from 1961 to 2015 is examined using with Johansen Cointegration Test and Fully Modified Ordinary Least Square (FMOLS) and Dynamic Ordinary Least Square (DOLS) Test. Test results indicate the existence of long run relationship between financial development, economic growth and energy consumption in Turkey. In addition The FMOLS and DOLS test results show that financial development and economic growth have a positive effect on energy consumption in Turkey. For this reason, policy makers should also take into account the impact of financial development on energy consumption while setting energy policies and setting targets. Keywords: Financial Development, Energy Consumption, Economic Growth, Co-integration, Turkey. JEL Classifications: C32, Q43
    Electronic ISSN: 2146-4553
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Economics
    Published by EconJournals
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 28
    facet.materialart.
    EconJournals
    Publication Date: 2018-09-06
    Description: The current paper examines the impact of Oil Price (OP) fluctuations on Islamic banking investments growth in the UAE. Besides, oil price, the study also uses other variables like Gross Domestic Product (GDP) and Foreign Direct Investment (FDI) to identify the determinants of the Islamic banking investments growth in the emerging economy, UAE.  The study is based on econometric analysis with the help of annual time series data from 1990 to 2015 for the study variables. Stationary tests, Cointegration methods, Vector Error Correction Model (VECM), and Granger causality tests are used in the analysis. The major findings of the study revealed that oil prices have long-term and short-term relationships on the Islamic banking investments in the UAE. Our results explore the importance of oil price stabilization in enhancing growth and progress in the UAE economy. The Government of UAE should reform policies and procedures to minimize the effect of such volatility in oil prices which in turn leads to positive impacts on the UAE economy as well. Keywords: Oil Price, Volatility, FDI, GDP, Islamic investments, Growth, UAE. JEL Classifications: F21, F41, O16
    Electronic ISSN: 2146-4553
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Economics
    Published by EconJournals
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 29
    facet.materialart.
    EconJournals
    Publication Date: 2018-09-06
    Description: This study aimed to analyses the impact of palm oil-based biodiesel development on growth and poverty in Indonesia that combined with government policy using simultaneous equation econometric 2 SLS’s models. The result shows that if the export tax, and government expenditure in industry increase; then domestic exchange rate (IDR) and interest rate decrease, those will give positive impact on economy growth and vice versa gives a negative impact to poverty. The simulation may apply to know the impact on economy growth, and poverty in Indonesia by the development. The study found that palm oil-based biodiesel development can create a growth and poverty in Indonesia and CPO biodiesel development can be synergized with the increasing export tax and government expenditure in industry, so growth and poverty-reducing in Indonesia will be better and qualify. However, government must maintain stability of exchange rate fluctuation because the impact can reduce CPO production industry. Keywords : Crude Palm Oil, Energy, Industry, Economic growth, Poverty JEL Classifications : E24, E27, C5, O31
    Electronic ISSN: 2146-4553
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Economics
    Published by EconJournals
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 30
    facet.materialart.
    EconJournals
    Publication Date: 2018-09-06
    Description: This paper presents a critical review of market power modelling in the electricity market. This research provides a coherent guideline for policy market to determine suitable modelling for market power in the electricity market. This research also includes market power index application in competition policy enforcement. An ideal market power index is one which provides the most straightforward number to measure the market power exercise. However, a more sophisticated approach is needed to mitigate market power since traditional indexes have limitations in representing the complexity of the power system. Cournot modelling has the main weakness in large-scale power system modelling with transmission constraint. However, However, the Cournot model continues to develop as a tool to analyse player behaviour due to the analytical connectivity between a real power market and microeconomic engineering theory, e.g. DC load flow, reserve margin, transmission constraint, forward contract, demand elasticity, and RSI. Keywords: market power, electricity market, competition policy JEL Classifications: D470, L160, L400
    Electronic ISSN: 2146-4553
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Economics
    Published by EconJournals
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 31
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-09-06
    Description: IJERPH, Vol. 15, Pages 1935: Does Information Pattern Affect Risk Perception of Food Safety? A National Survey in China International Journal of Environmental Research and Public Health doi: 10.3390/ijerph15091935 Authors: Guanghua Han Yihong Liu Examining the variances in the assessments of risk, as perceived by residents, facilitates the development of appropriate risk information communication strategies. This paper aims to identify the effects of information source patterns on perceived food safety risks based on demographic factors. A national survey was conducted to examine, by means of multiple regression analysis, the relationship between the public’s perceived risks, demographic factors and information access. The study finds that residents’ preferences for information sources have been empirically proven to significantly affect their perceptions of food safety. We also find that more educated young urban dwellers, as well as those without cohabitation experience, tend to perceive a higher level of risk with respect to food safety. In contrast to our expectations, gender, family income and family size are not significantly correlated with the perception of food safety risk. The findings help to explain residents’ attitudes toward food safety administration and reactions to food hazards in the Chinese context. It is recommended that the governing authorities strengthen their communication capacities using modern communication media and make full use of traditional and face-to-face communications with respect to regulations.
    Print ISSN: 1661-7827
    Electronic ISSN: 1660-4601
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 32
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-09-06
    Description: IJERPH, Vol. 15, Pages 1934: Pregnancy Related Health Care Needs in Refugees—A Current Three Center Experience in Europe International Journal of Environmental Research and Public Health doi: 10.3390/ijerph15091934 Authors: Christian Dopfer Annabelle Vakilzadeh Christine Happle Evelyn Kleinert Frank Müller Diana Ernst Reinhold E. Schmidt Georg M. N. Behrens Sonja Merkesdal Martin Wetzke Alexandra Jablonka Background: Immigration into Europe has reached an all-time high. Provision of coordinated healthcare, especially to refugee women that are at increased risk for adverse pregnancy outcomes, is a challenge for receiving health care systems. Methods: We assessed pregnancy rates and associated primary healthcare needs in three refugee cohorts in Northern Germany during the current crisis. Results: Out of n = 2911 refugees, 18.0% were women of reproductive age, and 9.1% of these were pregnant. Pregnancy was associated with a significant, 3.7-fold increase in primary health care utilization. Language barrier and cultural customs impeded healthcare to some refugee pregnant women. The most common complaints were demand for pregnancy checkup without specific symptoms (48.6%), followed by abdominal pain or urinary tract infections (in 11.4% of cases each). In 4.2% of pregnancies, severe complications such as syphilis or suicide attempts occurred. Discussion: We present data on pregnancy rates and pregnancy associated medical need in three current refugee cohorts upon arrival in Germany. Healthcare providers should be particularly aware of the requirements of pregnant migrants and should adapt primary caretaking strategies accordingly.
    Print ISSN: 1661-7827
    Electronic ISSN: 1660-4601
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 33
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-09-06
    Description: IJERPH, Vol. 15, Pages 1932: Reducing the Future Risk of Trauma: On the Integration of Global Disaster Policy within Specific Health Domains and Established Fields of Practice International Journal of Environmental Research and Public Health doi: 10.3390/ijerph15091932 Authors: Lennart Reifels The global increase in the frequency and severity of natural hazards and extreme climatic events necessitates more efficient global and national strategies to reduce the likelihood and impact of traumatic consequences for disaster-affected populations. The recent inclusion of mental health in the Sendai Framework for Disaster Risk Reduction marks a pivotal point in the recognition of the significant burden of disasters on mental health, and a global commitment to reducing its impacts. Nevertheless, effective agreement implementation and efforts to reduce disaster mental health risks are facing significant challenges. These include a lack of clarity about the conceptual interlinkages and place of disaster risk reduction principles within the field of disaster mental health, which is traditionally marked by a prevailing recovery orientation, and the need for effective translation into disaster mental health policy and practice. Therefore, this study drew on data from interviews with European disaster mental health and risk reduction experts in order to appraise the merit and implications of a global disaster risk reduction policy for advancing population mental health in the context of disaster. Study findings outline existing opportunities, challenges, and key strategies for the integration of disaster risk reduction within disaster mental health policy and practice.
    Print ISSN: 1661-7827
    Electronic ISSN: 1660-4601
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 34
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-09-06
    Description: IJERPH, Vol. 15, Pages 1931: The Association between US Adolescents’ Weight Status, Weight Perception, Weight Satisfaction, and Their Physical Activity and Dietary Behaviors International Journal of Environmental Research and Public Health doi: 10.3390/ijerph15091931 Authors: Furong Xu Steven A. Cohen Mary L. Greaney Geoffrey W. Greene Background: It remain unclear that the association between weight status, weight perception, weight satisfaction and the clustering of physical activity (PA) and dietary behaviors in adolescents. Method: A cross-sectional analysis of National Health and Nutrition Examination Survey and the US Department of Agriculture’s Food Patterns Equivalents 2007–2014 data from adolescents aged 12–17 years (n = 2965) was conducted. Multivariable logistic regression models adjusted for demographic characteristics examined the association between weight status, weight perception, weight satisfaction, and the four created lifestyle groups (healthier behaviors, healthier diet only, physically active only, unhealthier behaviors). Results: Males with obesity were more likely to be in the healthier diet only group than males with a normal weight (OR = 1.90, 95% CI: 1.02, 3.52). Similar patterns were found in males who perceived themselves as being overweight or having obesity (OR = 2.09, 95% CI: 1.09, 3.99) and males with obesity who perceived their weight status accurately (OR = 2.33, 95% CI: 1.12, 4.88). Female respondents who were satisfied with their weight were 59% less likely to be in the healthier diet only group than healthier behaviors group compared with females who were weight dissatisfied (OR = 0.41, 95% CI: 0.23, 0.75). This pattern was not observed in males. Conclusions: Clustering PA and dietary behaviors were associated with weight status and weight perception for males but not females. Weight satisfaction was associated with clustered PA and dietary behaviors for females. These findings are important for obesity prevention policies and programs to better address adolescents’ obesity and reduce health disparities in this population.
    Print ISSN: 1661-7827
    Electronic ISSN: 1660-4601
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 35
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-09-06
    Description: IJGI, Vol. 7, Pages 366: Introduction to the Special Issue: “State-of-the-Art Virtual/Augmented Reality and 3D Modeling Techniques for Virtual Urban Geographic Experiments” ISPRS International Journal of Geo-Information doi: 10.3390/ijgi7090366 Authors: Jianming Liang Jianhua Gong Yu Liu n/a
    Electronic ISSN: 2220-9964
    Topics: Architecture, Civil Engineering, Surveying , Geosciences
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 36
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-09-06
    Description: IJERPH, Vol. 15, Pages 1927: The Association of the 24 Hour Distribution of Time Spent in Physical Activity, Work, and Sleep with Emotional Exhaustion International Journal of Environmental Research and Public Health doi: 10.3390/ijerph15091927 Authors: Janina Janurek Sascha Abdel Hadi Andreas Mojzisch Jan Alexander Häusser Previous research identified time spent in physical activity, sleeping, and working as predictors of emotional exhaustion. However, this research did not take into account the interdependence of these time-use components. Since daily time is limited to 24 h, time spent in one specific activity (e.g., sleep) cannot be used for any other activity (e.g., physical activity). We conducted a one-week daily sampling study to assess the compositional effects of physical activity, sleep, and work on emotional exhaustion. Since the sample consisted of 104 undergraduate students, work was operationalized as study time. Participants wore accelerometers for one week continuously to assess sleep and physical activity. Also, they filled in questionnaires on study time and emotional exhaustion every morning. Multilevel and compositional data analyses were conducted. The multilevel analysis revealed significant between- (p = 0.012) and within-level (p < 0.001) associations of study time with emotional exhaustion. The compositional approach showed that time spent in physical activity was negatively related to emotional exhaustion (p = 0.007), whereas time spent studying was positively related to emotional exhaustion (p = 0.003), relative to the remaining two time-use components. In conclusion, our results show that emotional exhaustion is not only associated with work-related factors, but also with off-job physical activity.
    Print ISSN: 1661-7827
    Electronic ISSN: 1660-4601
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 37
    facet.materialart.
    International Union of Crystallography (IUCr)
    In: IUCrJ
    Publication Date: 2018-09-06
    Description: In this study, the nature and characteristics of a short Br...π interaction observed in an ebselen derivative, 2-(2-bromophenyl)benzo[d][1,2]selenazol-3(2H)-one, has been explored. The electronic nature of this Br...π interaction was investigated via high-resolution X-ray diffraction and periodic density functional theory calculations using atoms-in-molecules (AIM) analysis. This study unravels the simultaneous presence of σ-hole and π-hole bonding characteristics in the same interaction. The dual characteristics of this unique Br...π interaction are further established via molecular electrostatic potentials (MESPs) and natural bond orbitals (NBOs).
    Keywords: σ-hole bondingπ-hole bondingebselenelectron densitymolecular electrostatic potentialscrystal engineeringcharge, spin and momentum densitiescomputational modellingmolecular crystals
    Electronic ISSN: 2052-2525
    Topics: Geosciences , Physics
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 38
    Publication Date: 2018-09-06
    Description: Diffraction before destruction using X-ray free-electron lasers (XFELs) has the potential to determine radiation-damage-free structures without the need for crystallization. This article presents the three-dimensional reconstruction of the Melbournevirus from single-particle X-ray diffraction patterns collected at the LINAC Coherent Light Source (LCLS) as well as reconstructions from simulated data exploring the consequences of different kinds of experimental sources of noise. The reconstruction from experimental data suffers from a strong artifact in the center of the particle. This could be reproduced with simulated data by adding experimental background to the diffraction patterns. In those simulations, the relative density of the artifact increases linearly with background strength. This suggests that the artifact originates from the Fourier transform of the relatively flat background, concentrating all power in a central feature of limited extent. We support these findings by significantly reducing the artifact through background removal before the phase-retrieval step. Large amounts of blurring in the diffraction patterns were also found to introduce diffuse artifacts, which could easily be mistaken as biologically relevant features. Other sources of noise such as sample heterogeneity and variation of pulse energy did not significantly degrade the quality of the reconstructions. Larger data volumes, made possible by the recent inauguration of high repetition-rate XFELs, allow for increased signal-to-background ratio and provide a way to minimize these artifacts. The anticipated development of three-dimensional Fourier-volume-assembly algorithms which are background aware is an alternative and complementary solution, which maximizes the use of data.
    Keywords: XFELsMelbourneviruscoherent diffractive imagingLCLSimage reconstruction
    Electronic ISSN: 2052-2525
    Topics: Geosciences , Physics
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 39
    facet.materialart.
    MDPI
    Publication Date: 2018-09-06
    Description: JMSE, Vol. 6, Pages 102: Semi-Active Structural Control of Offshore Wind Turbines Considering Damage Development Journal of Marine Science and Engineering doi: 10.3390/jmse6030102 Authors: Arash Hemmati Erkan Oterkus High flexibility of new offshore wind turbines (OWT) makes them vulnerable since they are subjected to large environmental loadings, wind turbine excitations and seismic loadings. A control system capable of mitigating undesired vibrations with the potential of modifying its structural properties depending on time-variant loadings and damage development can effectively enhance serviceability and fatigue lifetime of turbine systems. In the present paper, a model for offshore wind turbine systems equipped with a semi-active time-variant tuned mass damper is developed considering nonlinear soil–pile interaction phenomenon and time-variant damage conditions. The adaptive concept of this tuned mass damper assumes slow change in its structural properties. Stochastic wind and wave loadings in conjunction with ground motions are applied to the system. Damages to soil and tower caused by earthquake strokes are considered and the semi-active control device is retuned to the instantaneous frequency of the system using short-time Fourier transformation (STFT). The performance of semi-active time-variant vibration control is compared with its passive counterpart in operational and parked conditions. The dynamic responses for a single seismic record and a set of seismic records are presented. The results show that a semi-active mass damper with a mass ratio of 1% performs significantly better than a passive tuned mass damper with a mass ratio of 4%.
    Electronic ISSN: 2077-1312
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by MDPI
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 40
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-09-06
    Description: Materials, Vol. 11, Pages 1627: Fabrication of Mo-Doped WO3 Nanorod Arrays on FTO Substrate with Enhanced Electrochromic Properties Materials doi: 10.3390/ma11091627 Authors: Bao Wang Wenkuan Man Haiyang Yu Yang Li Feng Zheng Well-oriented and crystalline WO3 nanorod arrays (WNRAs) decorated with Mo were synthesized on fluorine doped tin oxide (FTO) substrate by the hydrothermal method. The effects of Mo doping, hydrothermal reaction time, and hydrothermal temperature on the morphologies and electrochromic properties of as-prepared WNRAs were studied thoroughly. Scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and chronoamperometry techniques were used to characterize the structures and properties of obtained WNRAs. The results demonstrate that the average diameter of the as-prepared WNRAs ranged from 30 to 70 nm. During the decoration of Mo on the WNRAs, the growth density of as-prepared WNRAs decreased and the surfaces became rough. However, the decorated Mo on WNRAs synthesized at 180 °C for 5 h with a Mo/W mole ratio of 1:40 exhibited better electrochromic properties than single WNRAs. They exhibited high optical modulation (61.7%), fast bleaching/coloring response times (3 s/9 s), high coloration efficiency values (73.1 cm2/C), and good cycling stability.
    Electronic ISSN: 1996-1944
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 41
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-09-06
    Description: Materials, Vol. 11, Pages 1625: Dissolving Microneedle Patches for Transdermal Insulin Delivery in Diabetic Mice: Potential for Clinical Applications Materials doi: 10.3390/ma11091625 Authors: Chih-Hao Chen Victor Bong-Hang Shyu Chien-Tzung Chen In this study, dissolving polymeric microneedle (MN) patches composed of gelatin and sodium carboxymethyl cellulose (CMC) were used to localize insulin. Their in vitro skin insertion capabilities were determined using tissue-marking dye to stain the skin after patches removal. Scanning electron microscopy (SEM) was used to determine changes in the MNs over time, and optical coherence tomography (OCT) was used to monitor their real-time penetration depth. Confocal microscopy images revealed that rhodamine 6G gradually diffuses from the puncture sites to deeper dermal tissue. Using an in vivo imaging system (IVIS), skin areas that received FITC-insulin-loaded MNs were found to present strong fluorescent signals that greatly decreased 1 h after application. Results show that dissolving MNs rapidly release FITC-insulin, and it then gradually diffuses into the skin. This study verifies that using a gelatin/CMC MN patch for insulin delivery achieves satisfactory relative bioavailability compared to a traditional hypodermic injection and can be a promising delivery device for poorly permeable protein drugs such as those used to treat diabetes. Insertion tests on human cadaveric skin demonstrate that dissolving MNs could serve as efficient devices for transdermal drug delivery in clinical practice and that the volar aspect of forearm skin is the ideal location for their applications.
    Electronic ISSN: 1996-1944
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 42
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-09-06
    Description: Materials, Vol. 11, Pages 1624: ZnO/ZnAl2O4 Nanocomposite with 3D Sphere-Like Hierarchical Structure for Photocatalytic Reduction of Aqueous Cr(VI) Materials doi: 10.3390/ma11091624 Authors: Xiaoya Yuan Xin Cheng Qiuye Jing Jiawei Niu Dong Peng Zijuan Feng Xue Wu Three dimensional (3D) ZnO/ZnAl2O4 nanocomposites (ZnnAl-MMO) were synthesized by a simple urea-assisted hydrothermal process and subsequent high-temperature calcination. The as-prepared samples and their precursors were characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), UV-Vis diffuse reflectance spectroscopy (DRS), and Photoluminescence spectra (PL). It was observed that the morphology of ZnnAl-MMO nanocomposites could be tuned from cubic aggregates, hierarchically flower-like spheres to porous microspheres by simply changing the molar ratio of metal cations of the starting reaction mixtures. The photocatalytic performance of ZnO/ZnAl2O4 nanocomposites in the photoreduction of aqueous Cr(VI) indicated that the as-prepared 3D hierarchical sphere-like ZnnAl-MMO nanocomposite showed excellent photocatalytic activity of Cr(VI) reduction under UV light irradiation. The results indicated that the maximum removal percentage of aqueous Cr(VI) was 98% within four hours at 10 mg/L initial concentration of Cr(VI), owing to the effective charge separation and diversion of photogenerated carriers across the heterojunction interface of the composite. Our study put forward a facile method to fabricate hierarchical ZnO/ZnAl2O4 composites with potential applications for wastewater treatment.
    Electronic ISSN: 1996-1944
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 43
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-09-06
    Description: Materials, Vol. 11, Pages 1622: Hygrothermal and Acoustical Performance of Starch-Beet Pulp Composites for Building Thermal Insulation Materials doi: 10.3390/ma11091622 Authors: Hamzé Karaky Chadi Maalouf Christophe Bliard Tala Moussa Nadim El Wakil Mohammed Lachi Guillaume Polidori This article deals with the elaboration and the characterization of an innovative 100% plant-based green composite made solely of beet pulp (BP) and potato starch (S). Using this type of material in insulation applications seems a good solution to reduce the CO2 gas emissions in building. The influence of the starch amount on composite characteristics was studied. Four mixtures were considered with different S/BP mass ratios (0.1, 0.2, 0.3 and 0.4). The physical properties of these materials were studied in terms of porosity, apparent and absolute densities, thermal conductivity, and hygric properties. The influence of humidity content on acoustical properties was studied as a function of frequency. Test results show a real impact of both starch and humidity contents on the hygrothermal and acoustical properties of the studied material due to the porosity. The composite with the lowest amount of starch (S/BP = 0.1) seems to be the optimal composition in terms of the hygrothermal and acoustical behaviors.
    Electronic ISSN: 1996-1944
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 44
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-09-06
    Description: Materials, Vol. 11, Pages 1620: Push-Out Bond Strength and SEM Evaluation in Roots Filled with Two Different Techniques Using New and Conventional Sealers Materials doi: 10.3390/ma11091620 Authors: Pervin Dabaj Atakan Kalender Ayce Unverdi Eldeniz The aim of this study was to evaluate the influence of calcium-silicate-based sealer (Endosequence-BC-Sealer) in roots, filled with thermo-plasticized injectable technique aided by Calamus-Flow-Delivery-System, on bond strength to radicular dentin, in comparison with conventional epoxy-resin-based sealer (AH-Plus) along with cold-lateral-compaction technique. Root canals of mandibular-premolar teeth (n = 80) were instrumented using Protaper Universal rotary files and were randomly divided into four experimental groups (n = 20) as follows: (1) AH-Plus + cold-lateral-compaction technique; (2) Endosequence-BC-Sealer + cold-lateral-compaction technique; (3) AH-Plus + thermo-plasticized injectable technique; and (4) Endosequence-BC-Sealer + thermo-plasticized injectable technique. Horizontal disc shaped samples from each group (n = 60/group) were obtained and push-out bond strength testing was performed at a cross-head speed of 0.5 mm/min. Data were analyzed statistically using nonparametric Kruskal-Wallis analysis and Mann-Whitney test (p < 0.001). The statistical analysis revealed a significant difference amongst the groups (p < 0.001). The highest bond strength values were found in group 1 compared with all the other experimental groups (p < 0.001), whereas the lowest bond strength values were found in group 4 (p < 0.001). It was concluded that thermo-plasticized injectable technique with Calamus-Flow-Delivery-System lowered the bond strengths of the sealers, especially Endosequence-BC-Sealer. Therefore, this technique is not recommended to calcium-silicate-based sealers. Further studies are needed to confirm the findings of this study.
    Electronic ISSN: 1996-1944
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 45
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-09-06
    Description: Materials, Vol. 11, Pages 1616: A Novel Fluorescent Biosensor for Adenosine Triphosphate Detection Based on a Metal–Organic Framework Coating Polydopamine Layer Materials doi: 10.3390/ma11091616 Authors: Peipei Xu Guangfu Liao In this work, a novel and sensitive fluorescent biosensor based on polydopamine coated Zr-based metal–organic framework (PDA/UiO-66) is presented for adenosine triphosphate (ATP) detection. This PDA/UiO-66 nanoparticle which holds a great potential to be excellent fluorescence quencher can protect the 6-carboxyfluorescein (FAM)-labeled probe from cleaved by DNase I dispersed in solution and the flurescence of labeled FAM is quenched. When ATP molecules exist, aptamers on the PDA/UiO-66 nanoparticles can hybridize with ATP molecule to form complex structure that will be desorbed from the PDA/UiO-66 and digested by DNase I. After that, the released ATP molecule can react with another aptamer on the PDA/UiO-66 complexes, then restarts a new cycle. Herein, the excellent strong fluorescence quenching ability and uploading more amount of aptamer probes of PDA/UiO-66 composites make them efficient biosensors, leading to a high sensitivity with detection limit of 35 nM. Compared with ATP detection directly by UiO-66-based method, the LOD is about 5.7 times higher with PDA/UiO-66 nanoparticle. Moreover, the enhanced biocompatibility and bioactivity with PDA layer of the composites render a proposed strategy for clinical diagnosis field of detecting small biological molecules in vivo in the future.
    Electronic ISSN: 1996-1944
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 46
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-09-06
    Description: Materials, Vol. 11, Pages 1617: Correction: Control of the Size of Silver Nanoparticles and Release of Silver in Heat Treated SiO2-Ag Composite Powders. Materials 2018, 11, 80 Materials doi: 10.3390/ma11091617 Authors: Henrika Granbohm Juha Larismaa Saima Ali Leena-Sisko Johansson Simo-Pekka Hannula In the published article “Control of the Size of Silver Nanoparticles and Release of Silver in Heat Treated SiO2-Ag Composite Powders” [1] a reference was omitted in the caption of Figure 4b. [...]
    Electronic ISSN: 1996-1944
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 47
    facet.materialart.
    Nature Publishing Group (NPG)
    Publication Date: 2018-09-06
    Description: RAS at the Golgi antagonizes malignant transformation through PTPRκ-mediated inhibition of ERK activation RAS at the Golgi antagonizes malignant transformation through PTPRκ-mediated inhibition of ERK activation, Published online: 05 September 2018; doi:10.1038/s41467-018-05941-8 RAS isoforms are associated with the plasma membrane and endomembranes, but how their localization contributes to tumorigenesis is unclear. Here, the authors show that RAS signals from Golgi complex antagonize tumour formation by inducing apoptosis via ERK inhibition.
    Electronic ISSN: 2041-1723
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General , Physics
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 48
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-09-06
    Description: Minerals, Vol. 8, Pages 388: Ore-Forming Processes at the Xiajinbao Gold Deposit in Eastern Hebei Province: Constraints from EPMA and LA-ICPMS Analysis Minerals doi: 10.3390/min8090388 Authors: Cheng Wang Yongjun Shao Kuanxin Huang Haodi Zhou Jianguo Zhang Zhongfa Liu Qingquan Liu The Xiajinbao gold deposit is located at the northern margin of the North China Craton. Hydrothermal pyrites belonging to three stages were identified: Py1; Py2; and Py3. Geochemical study of these pyrites was conducted using electron probe microanalysis and laser ablation inductively coupled plasma mass spectrometry to investigate the distributions of minor and trace elements, constrain pyrite genesis, and to obtain an improved understanding of the ore-forming processes. Py1 and Py2 contain high concentrations of Au and are interpreted to have been deposited from fluids from a dominantly magmatic source. Py3 grains have the lowest Co/Ni ratios. All generations of pyrite were deposited by mixing of meteoric waters with magmatic-hydrothermal fluids. Boiling of early ore-forming fluids led to the precipitation of Py1 and gold. Decreasing fO2 in the ore-forming system resulted in the formation of Py2 and gold. Fluid mixing was the dominant controlling factor for the precipitation of Py3 together with small amounts of gold.
    Electronic ISSN: 2075-163X
    Topics: Geosciences
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 49
    facet.materialart.
    Nature Publishing Group (NPG)
    Publication Date: 2018-09-06
    Description: Anomalous twin boundaries in two dimensional materials Anomalous twin boundaries in two dimensional materials, Published online: 05 September 2018; doi:10.1038/s41467-018-06074-8 All materials subjected to mechanical deformation form low energy interfaces known as twin boundaries. Here, the authors investigate a variety of structural features that form upon bending atomically thin 2D-crystals, and predict distinct classes of post deformation microstructure based on their atomic arrangement, bend angle and flake thickness.
    Electronic ISSN: 2041-1723
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General , Physics
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 50
    facet.materialart.
    Nature Publishing Group (NPG)
    Publication Date: 2018-09-06
    Description: Runx-dependent and silencer-independent repression of a maturation enhancer in the Cd4 gene Runx-dependent and silencer-independent repression of a maturation enhancer in the 〈i〉Cd4〈/i〉 gene, Published online: 05 September 2018; doi:10.1038/s41467-018-05803-3 The commitment of helper and cytotoxic lineages for CD4 and CD8 T cells, respectively, is associated with the regulation of Cd4 gene expression. Here the authors show that an intronic silencer, S4, has differential effects and synergy with the RUNX complex to act on two enhancer elements of the CD4 gene to control T cell lineage commitment in the thymus.
    Electronic ISSN: 2041-1723
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General , Physics
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 51
    facet.materialart.
    Nature Publishing Group (NPG)
    Publication Date: 2018-09-06
    Description: Precipitation thresholds regulate net carbon exchange at the continental scale Precipitation thresholds regulate net carbon exchange at the continental scale, Published online: 05 September 2018; doi:10.1038/s41467-018-05948-1 The sensitivity of terrestrial net ecosystem carbon exchange (NEE) to climate remains a major source of uncertainty. Here, the authors identify a precipitation threshold of between 750-950 mm yr−1 for the contiguous United States, beyond which NEE is regulated by respiration rather than production.
    Electronic ISSN: 2041-1723
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General , Physics
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 52
    facet.materialart.
    Institute of Physics (IOP)
    Publication Date: 2018-09-06
    Description: We present the experimental generation of light with directly observable close-to-ideal thermal statistical properties. The thermal light state is prepared using a spontaneous Raman emission in a warm atomic vapor. The photon number statistics are evaluated by both the measurement of second-order correlation function and by the detailed analysis of the corresponding photon number distribution, which certifies the quality of the Bose–Einstein statistics generated by a natural physical mechanism. We further demonstrate the extension of the spectral bandwidth of the generated light to hundreds of MHz domain while keeping the ideal thermal statistics, which suggests a direct applicability of the presented source in a broad range of applications including optical metrology, tests of robustness of quantum communication protocols, or quantum thermodynamics.
    Electronic ISSN: 1367-2630
    Topics: Physics
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 53
    facet.materialart.
    Institute of Physics (IOP)
    Publication Date: 2018-09-06
    Description: Randomized benchmarking (RB) protocols have become an essential tool for providing a meaningful partial characterization of experimental quantum operations. While the RB decay rate is known to enable estimates of the average fidelity of those operations under gate-independent Markovian noise, under gate-dependent noise this rate is more difficult to interpret rigorously. In this paper, we prove that single-qubit RB decay parameter p coincides with the decay parameter of the gate-set circuit fidelity , a novel figure of merit which characterizes the expected average fidelity over arbitrary circuits of operations from the gate-set. We also prove that, in the limit of high-fidelity single-qubit experiments, the possible alarming disconnect between the average gate fidelity and RB experimental results is simply explained by a basis mismatch between the gates and the state-preparation and measurement procedures, that is, to a unitary degree of freedom in labeling the Pau...
    Electronic ISSN: 1367-2630
    Topics: Physics
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 54
    facet.materialart.
    Institute of Physics (IOP)
    Publication Date: 2018-09-06
    Description: Many real systems such as, roads, shipping routes, and infrastructure systems can be modeled based on spatially embedded networks. The inter-links between two distant spatial networks, such as those formed by transcontinental airline flights, play a crucial role in optimizing communication and transportation over such long distances. Still, little is known about how inter-links affect the structural resilience of such systems. Here, we develop a framework to study the structural resilience of interlinked spatially embedded networks based on percolation theory. We find that the inter-links can be regarded as an external field near the percolation phase transition, analogous to a magnetic field in a ferromagnetic–paramagnetic spin system. By defining the analogous critical exponents δ and γ , we find that their values for various inter-links structures follow Widom’s scaling relations. Furthermore, we study the optimal robustness of our model and compare it with the a...
    Electronic ISSN: 1367-2630
    Topics: Physics
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 55
    facet.materialart.
    Public Library of Science (PLoS)
    Publication Date: 2018-09-06
    Description: by Bo Hyon Yun, Seung Joo Chon, Young Sik Choi, SiHyun Cho, Byung Seok Lee, Seok Kyo Seo
    Electronic ISSN: 1932-6203
    Topics: Medicine , Natural Sciences in General
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 56
    facet.materialart.
    Public Library of Science (PLoS)
    Publication Date: 2018-09-06
    Description: by Tenglong Xie, Wanrong Gu, Liguo Zhang, Lijie Li, Danyang Qu, Caifeng Li, Yao Meng, Jing Li, Shi Wei, Wenhua Li Maize ( Zea mays L.), an important agricultural crop, suffers from drought stress frequently during its growth period, thus leading to a decline in yield. 2-(3,4-Dichlorophenoxy) triethylamine (DCPTA) regulates many aspects of plant development; however, its effects on crop stress tolerance are poorly understood. We pre-treated maize seedlings by adding DCPTA to a hydroponic solution and then subjected the seedlings to a drought condition [15% polyethylene glycol (PEG)-6000 treatment]. The activities of superoxide dismutase (SOD), peroxidase (POD), ascorbate peroxidase (APX), and glutathione reductase (GR) were enhanced under drought stress and further enhanced by the DCPTA application. The activities of monodehydroascorbate reductase (MDHAR), dehydroascorbate reductase (DHAR) and catalase (CAT) declined continuously under drought stress; however, the activities partially recovered with DCPTA application. Up-regulation of the activities and transcript levels of APX, GR, MDHAR and DHAR in the DCPTA treatments contributed to the increases in ascorbate (AsA) and glutathione (GSH) levels and inhibited the increased generation rate of superoxide anion radicals (O 2 · − ), the contents of hydrogen peroxide (H 2 O 2 ) and malondialdehyde (MDA), and the electrolyte leakage (EL) induced by drought. These results suggest that the enhanced antioxidant capacity induced by DCPTA application may represent an efficient mechanism for increasing the drought stress tolerance of maize seedlings.
    Electronic ISSN: 1932-6203
    Topics: Medicine , Natural Sciences in General
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 57
    facet.materialart.
    Public Library of Science (PLoS)
    Publication Date: 2018-09-06
    Description: by Elmar Kal, Rens Prosée, Marinus Winters, John van der Kamp Background Implicit motor learning is considered to be particularly effective for learning sports-related motor skills. It should foster movement automaticity and thereby facilitate performance in multitasking and high-pressure environments. To scrutinize this hypothesis, we systematically reviewed all studies that compared the degree of automatization achieved (as indicated by dual-task performance) after implicit compared to explicit interventions for sports-related motor tasks. Methods For this systematic review (CRD42016038249) conventional (MEDLINE, CENTRAL, Embase, PsycINFO, SportDiscus, Web of Science) and grey literature were searched. Two reviewers independently screened reports, extracted data, and performed risk of bias assessment. Implicit interventions of interest were analogy-, errorless-, dual-task-, and external focus learning. Data analysis involved descriptive synthesis of group comparisons on absolute motor dual-task (DT) performance, and motor DT performance relative to single-task motor performance (motor DTCs). Results Of the 4125 reports identified, we included 25 controlled trials that described 39 implicit-explicit group comparisons. Risk of bias was unclear across trials. Most comparisons did not show group differences. Some comparisons showed superior absolute motor DT performance (N = 2), superior motor DTCs (N = 4), or both (N = 3) for the implicit compared to the explicit group. The explicit group showed superior absolute motor DT performance in two comparisons. Conclusions Most comparisons did not show group differences in automaticity. The remaining comparisons leaned more toward a greater degree of movement automaticity after implicit learning than explicit learning. However, due to an overall unclear risk of bias the strength of the evidence is level 3. Motor learning-specific guidelines for design and especially reporting are warranted to further strengthen the evidence and facilitate low-risk-of-bias trials.
    Electronic ISSN: 1932-6203
    Topics: Medicine , Natural Sciences in General
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 58
    facet.materialart.
    Public Library of Science (PLoS)
    Publication Date: 2018-09-06
    Description: by Merel Maslowski, Antje S. Meyer, Hans Rutger Bosker Listeners are known to use adjacent contextual speech rate in processing temporally ambiguous speech sounds. For instance, an ambiguous vowel between short /α/ and long /a:/ in Dutch sounds relatively long (i.e., as /a:/) embedded in a fast precursor sentence, but short in a slow sentence. Besides the local speech rate, listeners also track talker-specific global speech rates. However, it is yet unclear whether other talkers’ global rates are encoded with reference to a listener’s self-produced rate. Three experiments addressed this question. In Experiment 1, one group of participants was instructed to speak fast, whereas another group had to speak slowly. The groups were compared on their perception of ambiguous /α/-/a:/ vowels embedded in neutral rate speech from another talker. In Experiment 2, the same participants listened to playback of their own speech and again evaluated target vowels in neutral rate speech. Neither of these experiments provided support for the involvement of self-produced speech in perception of another talker’s speech rate. Experiment 3 repeated Experiment 2 but with a new participant sample that was unfamiliar with the participants from Experiment 2. This experiment revealed fewer /a:/ responses in neutral speech in the group also listening to a fast rate, suggesting that neutral speech sounds slow in the presence of a fast talker and vice versa. Taken together, the findings show that self-produced speech is processed differently from speech produced by others. They carry implications for our understanding of rate-dependent speech perception in dialogue settings, suggesting that both perceptual and cognitive mechanisms are involved.
    Electronic ISSN: 1932-6203
    Topics: Medicine , Natural Sciences in General
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 59
    facet.materialart.
    Public Library of Science (PLoS)
    Publication Date: 2018-09-06
    Description: by Jill A. McDonald, Anup Amatya, Charlotte C. Gard, Jesus Sigala Background Cesarean delivery occurs in one in three US births and poses risks for mothers and infants. Hispanic cesarean rates were higher than non-Hispanic white rates in the US in 2016. In 2009, cesarean rates among Hispanics on the US-Mexico border exceeded rates among US Hispanics. Since 2009, rates have declined nationwide, but border Hispanic rates have not been studied. Objective To compare cesarean delivery rates and trends in Hispanics and non-Hispanic whites in border and nonborder counties of the four US border states before and after 2009. Study Design We used data from birth certificates to calculate percentages of cesarean deliveries among all births and births to low-risk nulliparous women during 2000–2015, and among births to low-risk women with and without a previous cesarean during 2009–2015. We calculated 95% confidence intervals around rates and used regular and piecewise linear regression to estimate trends for four ethnic-geographic subpopulations defined by combinations of Hispanic ethnicity and border-nonborder status. Results Of the four subpopulations, border Hispanic rates were highest every year for all cesarean outcomes. In 2015 they were 38.3% overall, 31.4% among low-risk nulliparous women, and 21.1% and 94.6% among low-risk women without and with a previous cesarean, respectively. Nonborder Hispanic rates in 2015 were lowest for all outcomes but repeat cesarean. Rates for all four subpopulations rose steadily during 2000–2009. Unlike rates for non-Hispanic whites, border and nonborder Hispanic rates did not decline post-2009. Most of the border Hispanic excess can be attributed to higher cesarean rates in Texas. Discussion Border Hispanic cesarean rates remain higher than those among other Hispanics and non-Hispanic whites in border states and show no signs of declining. This continuing disparity warrants further analysis using individual as well as hospital, environmental and other contextual factors to help target prevention measures.
    Electronic ISSN: 1932-6203
    Topics: Medicine , Natural Sciences in General
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 60
    facet.materialart.
    Nature Publishing Group (NPG)
    Publication Date: 2018-09-07
    Description: Imaging the nanoscale phase separation in vanadium dioxide thin films at terahertz frequencies Imaging the nanoscale phase separation in vanadium dioxide thin films at terahertz frequencies, Published online: 06 September 2018; doi:10.1038/s41467-018-05998-5 The insulator-to-metal transition in vanadium dioxide still has many unexplored properties. Here the authors use multi-modal THz and mid-IR nano-imaging to examine the phase transition in VO2 thin films, and discuss the unexpectedly smooth transition at THz frequencies in the context of a dimer Hubbard model.
    Electronic ISSN: 2041-1723
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General , Physics
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 61
    Publication Date: 2018-09-07
    Description: Linking prostate cancer cell AR heterogeneity to distinct castration and enzalutamide responses Linking prostate cancer cell AR heterogeneity to distinct castration and enzalutamide responses, Published online: 06 September 2018; doi:10.1038/s41467-018-06067-7 The functional significance of the observed heterogeneity of androgen receptor (AR) expression in prostate cancer is unknown. Here the authors show AR expression heterogeneity is associated with distinct castration/enzalutamide responses and identify BCL-2 as a potential therapeutic target in castration-resistant prostate cancer.
    Electronic ISSN: 2041-1723
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General , Physics
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 62
    Publication Date: 2018-09-07
    Description: Jungle Express is a versatile repressor system for tight transcriptional control Jungle Express is a versatile repressor system for tight transcriptional control, Published online: 06 September 2018; doi:10.1038/s41467-018-05857-3 Tightly regulated promoters with strong inducibility and scalability are highly desirable for biological applications. Here the authors describe ‘Jungle Express’, a EilR repressor-based broad host system activated by cationic dyes.
    Electronic ISSN: 2041-1723
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General , Physics
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 63
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-09-07
    Description: Minerals, Vol. 8, Pages 391: Interpretation of Hydrophobization Behavior of Dodecylamine on Muscovite and Talc Surface through Dynamic Wettability and AFM Analysis Minerals doi: 10.3390/min8090391 Authors: Hao Jiang Ya Gao Sultan Ahmed Khoso Wanying Ji Yuehua Hu In this study, a new approach, “dynamic wettability”, and atomic force microscopy (AFM) imaging analysis techniques were successfully used to characterize the hydrophobization mechanism of the collector dodecylamine (DDA) on muscovite and talc surfaces. The attachment of bubbles to the minerals was studied through the dynamic contact angle to gain a detailed understanding of the hydrophobization mechanism of DDA on a muscovite and talc surface. AFM imaging and interaction forces were performed to explain the DDA adsorption mechanism on both minerals. Finally, flotation tests were performed to verify the effectiveness of these techniques. After treatments with DDA, the contact angles became much larger compared to initial angles, particularly for muscovite, and the attachment of bubbles on the talc surface was much easier than muscovite due to its natural hydrophobicity. From AFM imaging, both the muscovite and talc showed a similar tendency; the higher the DDA concentration, the more the adsorbed amount. However, the adsorbed amount of DDA on talc surface was obviously more than that on muscovite. As far as interaction forces are concerned, the maximum attractions occurred at certain different concentrations respectively for muscovite and talc and agreed well with the AFM-imaging results. Moreover, results obtained from flotation tests were promising and quite in agreement with the phenomenon of these techniques.
    Electronic ISSN: 2075-163X
    Topics: Geosciences
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 64
    facet.materialart.
    MDPI Publishing
    Publication Date: 2018-09-07
    Description: Minerals, Vol. 8, Pages 390: Evaluation of Magnetic Separation Efficiency on a Cassiterite-Bearing Skarn Ore by Means of Integrative SEM-Based Image and XRF–XRD Data Analysis Minerals doi: 10.3390/min8090390 Authors: Markus Buchmann Edgar Schach Raimon Tolosana-Delgado Thomas Leißner Jennifer Astoveza Marius Kern Robert Möckel Doreen Ebert Martin Rudolph Karl Gerald van den Boogaart Urs A. Peuker Image analysis data obtained from scanning electron microscopy provided data for a detailed evaluation of the separation efficiency for various processes involving the beneficiation of particulate materials. A dry magnetic separation by a drum type magnetic separator served as a case study to visualize effects of processing of a skarn ore with a high content of cassiterite as ore mineral (~4 wt%). For this material, iron oxides and silicates are the main gangue mineral groups. Based on the obtained data, partition curves were generated with the help of local regression. From the partition curves, the separation efficiency was evaluated and the relevant particle properties deduced. A detailed analysis of the bias of the quantitative mineralogical data is presented. This bias was monitored and further analyzed in detail. Thorough analysis of feed and products of magnetic separation enabled identification of the most important factors that control losses of cassiterite to the magnetic product, namely the association with iron oxides and particle sizes below ~40 µm. The introduced methodology is a general approach applicable for the optimization of different separation processes and is not limited to the presented case study.
    Electronic ISSN: 2075-163X
    Topics: Geosciences
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 65
    facet.materialart.
    Nature Publishing Group (NPG)
    Publication Date: 2018-09-07
    Description: microCLIP super learning framework uncovers functional transcriptome-wide miRNA interactions microCLIP super learning framework uncovers functional transcriptome-wide miRNA interactions, Published online: 06 September 2018; doi:10.1038/s41467-018-06046-y AGO-PAR-CLIP is widely used for high-throughput miRNA target characterization. Here, the authors show that the previously neglected non-T-to-C clusters denote functional miRNA binding events, and develop microCLIP, a super learning framework that accurately detects miRNA interactions.
    Electronic ISSN: 2041-1723
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General , Physics
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 66
    Publication Date: 2018-09-07
    Description: Printing two-dimensional gallium phosphate out of liquid metal Printing two-dimensional gallium phosphate out of liquid metal, Published online: 06 September 2018; doi:10.1038/s41467-018-06124-1 Two-dimensional piezoelectric materials hold promise for nano-electromechanical technologies, yet it is challenging to prepare them in large areas with high sample homogeneity. Syed et al. surface print GaPO4 sheets with unit cell thickness over centimetres using a liquid metal-based synthesis process.
    Electronic ISSN: 2041-1723
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General , Physics
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 67
    Publication Date: 2018-09-07
    Description: Co-activation of super-enhancer-driven CCAT1 by TP63 and SOX2 promotes squamous cancer progression Co-activation of super-enhancer-driven CCAT1 by TP63 and SOX2 promotes squamous cancer progression, Published online: 06 September 2018; doi:10.1038/s41467-018-06081-9 Master regulator transcription factors TP63 and SOX2 have been reported to overlap in genomic occupancy in squamous cell carcinomas (SCCs). Here, the authors demonstrate that TP63 and SOX2 promote co-operatively long non-coding RNA CCAT1 expression through activating its super-enhancer, and CCAT1 forms a complex with TP63 and SOX2, which regulates EGFR super-enhancers and enhances both the MEK/ERK1/2 and PI3K/AKT signaling pathways in SCC.
    Electronic ISSN: 2041-1723
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General , Physics
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 68
    Publication Date: 2018-09-07
    Description: Realization of vertical metal semiconductor heterostructures via solution phase epitaxy Realization of vertical metal semiconductor heterostructures via solution phase epitaxy, Published online: 06 September 2018; doi:10.1038/s41467-018-06053-z Controlling the composition and crystal phase of layered heterostructures is important. Here, the authors report the liquid-phase epitaxial growth of Sn0.5W0.5S2 nanosheets with 83% metallic phase on SnS2 nanoplates, which are used as 100 ppb level chemiresistive gas sensors at room temperature.
    Electronic ISSN: 2041-1723
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General , Physics
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 69
    facet.materialart.
    Nature Publishing Group (NPG)
    Publication Date: 2018-09-07
    Description: Publisher Correction: Collective molecular switching in hybrid superlattices for light-modulated two-dimensional electronics Publisher Correction: Collective molecular switching in hybrid superlattices for light-modulated two-dimensional electronics, Published online: 06 September 2018; doi:10.1038/s41467-018-05541-6 Publisher Correction: Collective molecular switching in hybrid superlattices for light-modulated two-dimensional electronics
    Electronic ISSN: 2041-1723
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General , Physics
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 70
    facet.materialart.
    Royal Society of Chemistry (RSC)
    Publication Date: 2018-09-07
    Description: Photochem. Photobiol. Sci. , 2018, Advance Article DOI : 10.1039/C8PP90040J, Editorial L. Charbonnière, S. Haacke We are delighted to present this special collection of papers presented at the 28th International Conference on Photochemistry (ICP2017). To cite this article before page numbers are assigned, use the DOI form of citation above. The content of this RSS Feed (c) The Royal Society of Chemistry
    Print ISSN: 1474-905X
    Electronic ISSN: 1474-9092
    Topics: Chemistry and Pharmacology
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 71
    facet.materialart.
    American Physical Society (APS)
    In: Physics
    Publication Date: 2018-09-07
    Description: Using a nanowire with controllable width, researchers have created a type of Wigner crystal in which electrons form an ordered zigzag pattern. [Physics] Published Thu Sep 06, 2018
    Electronic ISSN: 1539-0748
    Topics: Physics
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 72
    facet.materialart.
    Royal Society of Chemistry (RSC)
    Publication Date: 2018-09-07
    Description: Photochem. Photobiol. Sci. , 2018, Accepted Manuscript DOI : 10.1039/C8PP00311D, Paper Debora Fabbri, M.J. Lopez-Muñoz, Alessandro Daniele, Claudio Medana, Paola Calza In this work, the performances of two different catalysts, Ce-ZnO and TiO 2 synthetized in our laboratories, were compared with the commercial TiO 2 -P25 to degrade a mixture of seven emerging concern... The content of this RSS Feed (c) The Royal Society of Chemistry
    Print ISSN: 1474-905X
    Electronic ISSN: 1474-9092
    Topics: Chemistry and Pharmacology
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 73
    facet.materialart.
    Public Library of Science (PLoS)
    Publication Date: 2018-09-07
    Description: by Itamar Eliakim, Zahi Cohen, Gabor Kosa, Yossi Yovel Echolocating bats rely on active sound emission (echolocation) for mapping novel environments and navigating through them. Many theoretical frameworks have been suggested to explain how they do so, but few attempts have been made to build an actual robot that mimics their abilities. Here, we present the ‘Robat’—a fully autonomous bat-like terrestrial robot that relies on echolocation to move through a novel environment while mapping it solely based on sound. Using the echoes reflected from the environment, the Robat delineates the borders of objects it encounters, and classifies them using an artificial neural-network, thus creating a rich map of its environment. Unlike most previous attempts to apply sonar in robotics, we focus on a biological bat-like approach, which relies on a single emitter and two ears, and we apply a biological plausible signal processing approach to extract information about objects’ position and identity.
    Print ISSN: 1553-734X
    Electronic ISSN: 1553-7358
    Topics: Biology , Computer Science
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 74
    facet.materialart.
    Public Library of Science (PLoS)
    Publication Date: 2018-09-07
    Description: by Imke Spöring, Vincent A. Martinez, Christian Hotz, Jana Schwarz-Linek, Keara L. Grady, Josué M. Nava-Sedeño, Teun Vissers, Hanna M. Singer, Manfred Rohde, Carole Bourquin, Haralampos Hatzikirou, Wilson C. K. Poon, Yann S. Dufour, Marc Erhardt Most bacteria swim in liquid environments by rotating one or several flagella. The long external filament of the flagellum is connected to a membrane-embedded basal body by a flexible universal joint, the hook, which allows the transmission of motor torque to the filament. The length of the hook is controlled on a nanometer scale by a sophisticated molecular ruler mechanism. However, why its length is stringently controlled has remained elusive. We engineered and studied a diverse set of hook-length variants of Salmonella enterica . Measurements of plate-assay motility, single-cell swimming speed, and directional persistence in quasi-2D and population-averaged swimming speed and body angular velocity in 3D revealed that the motility performance is optimal around the wild-type hook length. We conclude that too-short hooks may be too stiff to function as a junction and too-long hooks may buckle and create instability in the flagellar bundle. Accordingly, peritrichously flagellated bacteria move most efficiently as the distance travelled per body rotation is maximal and body wobbling is minimized. Thus, our results suggest that the molecular ruler mechanism evolved to control flagellar hook growth to the optimal length consistent with efficient bundle formation. The hook-length control mechanism is therefore a prime example of how bacteria evolved elegant but robust mechanisms to maximize their fitness under specific environmental constraints.
    Print ISSN: 1544-9173
    Electronic ISSN: 1545-7885
    Topics: Biology
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 75
    facet.materialart.
    Public Library of Science (PLoS)
    Publication Date: 2018-09-07
    Description: by Helmut Schmidt, Daniele Avitabile, Ernest Montbrió, Alex Roxin Oscillatory activity robustly correlates with task demands during many cognitive tasks. However, not only are the network mechanisms underlying the generation of these rhythms poorly understood, but it is also still unknown to what extent they may play a functional role, as opposed to being a mere epiphenomenon. Here we study the mechanisms underlying the influence of oscillatory drive on network dynamics related to cognitive processing in simple working memory (WM), and memory recall tasks. Specifically, we investigate how the frequency of oscillatory input interacts with the intrinsic dynamics in networks of recurrently coupled spiking neurons to cause changes of state: the neuronal correlates of the corresponding cognitive process. We find that slow oscillations, in the delta and theta band, are effective in activating network states associated with memory recall. On the other hand, faster oscillations, in the beta range, can serve to clear memory states by resonantly driving transient bouts of spike synchrony which destabilize the activity. We leverage a recently derived set of exact mean-field equations for networks of quadratic integrate-and-fire neurons to systematically study the bifurcation structure in the periodically forced spiking network. Interestingly, we find that the oscillatory signals which are most effective in allowing flexible switching between network states are not smooth, pure sinusoids, but rather burst-like, with a sharp onset. We show that such periodic bursts themselves readily arise spontaneously in networks of excitatory and inhibitory neurons, and that the burst frequency can be tuned via changes in tonic drive. Finally, we show that oscillations in the gamma range can actually stabilize WM states which otherwise would not persist.
    Print ISSN: 1553-734X
    Electronic ISSN: 1553-7358
    Topics: Biology , Computer Science
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 76
    facet.materialart.
    Public Library of Science (PLoS)
    Publication Date: 2018-09-07
    Description: by Weizhong Chen, Yi Liu, Shanshan Zhu, Guoyu Chen, Jing-Dong J. Han Combinatorial effects of epigenetic modifications on transcription activity have been proposed as “histone codes”. However, it is unclear whether there also exist inter-nucleosomal communications among epigenetic modifications at single nucleosome level, and if so, what functional roles they play. Meanwhile, how clear nucleosome patterns, such as nucleosome phasing and depletion, are formed at functional regions remains an intriguing enigma. To address these questions, we developed a Bayesian network model for interactions among different histone modifications across neighboring nucleosomes, based on the framework of dynamic Bayesian network (DBN). From this model, we found that robust inter-nucleosomal interactions exist around transcription start site (TSS), transcription termination sites (TTS) or around CTCF binding sites; and these inter-nucleosomal interactions are often involved in transcription regulation. In addition to these general principles, DBN also uncovered a novel specific epigenetic interaction between H2A.Z and H4K20me1 on neighboring nucleosomes, involved in nucleosome free region (NFR) and nucleosome phasing establishment or maintenance. The level of negative correlation between neighboring H2A.Z and H4K20me1 strongly correlate with the size of NFR and the strength of nucleosome phasing around TSS. Our study revealed inter-nucleosomal communications as important players in signal propagation, chromatin remodeling and transcription regulation.
    Print ISSN: 1553-734X
    Electronic ISSN: 1553-7358
    Topics: Biology , Computer Science
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 77
    facet.materialart.
    Public Library of Science (PLoS)
    Publication Date: 2018-09-07
    Description: by Ankur Garg, Abdul Hannan, Qian Wang, Tamica Collins, Siying Teng, Mukesh Bansal, Jian Zhong, Keli Xu, Xin Zhang FGF signaling is a potent inducer of lacrimal gland development in the eye, capable of transforming the corneal epithelium into glandular tissues. Here, we show that genetic ablation of the Pea3 family of transcription factors not only disrupted the ductal elongation and branching of the lacrimal gland, but also biased the lacrimal gland epithelium toward an epidermal cell fate. Analysis of high-throughput gene expression and chromatin immunoprecipitation data revealed that the Pea3 genes directly control both the positive and negative feedback loops of FGF signaling. Importantly, Pea3 genes are also required to suppress aberrant Notch signaling which, if gone unchecked, can compromise lacrimal gland development by preventing the expression of both Sox and Six family genes. These results demonstrate that Pea3 genes are key FGF early response transcriptional factors, programing the genetic landscape for cell fate determination.
    Print ISSN: 1553-7390
    Electronic ISSN: 1553-7404
    Topics: Biology
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 78
    facet.materialart.
    Public Library of Science (PLoS)
    Publication Date: 2018-09-07
    Description: by Choongwon Jeong, David B. Witonsky, Buddha Basnyat, Maniraj Neupane, Cynthia M. Beall, Geoff Childs, Sienna R. Craig, John Novembre, Anna Di Rienzo Adaptive evolution in humans has rarely been characterized for its whole set of components, i.e. selective pressure, adaptive phenotype, beneficial alleles and realized fitness differential. We combined approaches for detecting polygenic adaptations and for mapping the genetic bases of physiological and fertility phenotypes in approximately 1000 indigenous ethnically Tibetan women from Nepal, adapted to high altitude. The results of genome-wide association analyses and tests for polygenic adaptations showed evidence of positive selection for alleles associated with more pregnancies and live births and evidence of negative selection for those associated with higher offspring mortality. Lower hemoglobin level did not show clear evidence for polygenic adaptation, despite its strong association with an EPAS1 haplotype carrying selective sweep signals.
    Print ISSN: 1553-7390
    Electronic ISSN: 1553-7404
    Topics: Biology
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 79
    facet.materialart.
    Public Library of Science (PLoS)
    Publication Date: 2018-09-07
    Description: by Jennifer K. Pleiman, Amy A. Irving, Zhishi Wang, Erik Toraason, Linda Clipson, William F. Dove, Dustin A. Deming, Michael A. Newton Conservation over three mammalian genera—the mouse, rat, and human—has been found for a subset of the transcripts whose level differs between the adenoma and normal epithelium of the colon. Pde4b is one of the triply conserved transcripts whose level is enhanced both in the colonic adenoma and in the normal colonic epithelium, especially adjacent to adenomas. It encodes the phosphodiesterase PDE4B, specific for cAMP. Loss of PDE4B function in the Apc Min/+ mouse leads to a significant increase in the number of colonic adenomas. Similarly, Pde4b -deficient Apc Min/+ mice are hypersensitive to treatment by the inflammatory agent DSS, becoming moribund soon after treatment. These observations imply that the PDE4B function protects against Apc Min -induced adenomagenesis and inflammatory lethality. The paradoxical enhancement of the Pde4b transcript in the adenoma versus this inferred protective function of PDE4B can be rationalized by a feedback model in which PDE4B is first activated by early oncogenic stress involving cAMP and then, as reported for frank human colon cancer, inactivated by epigenetic silencing.
    Print ISSN: 1553-7390
    Electronic ISSN: 1553-7404
    Topics: Biology
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 80