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  • MDPI Publishing  (18)
  • Bucharest: European Institute of Romania  (1)
  • Bucharest: The Bucharest University of Economic Studies  (1)
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  • 1
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    Bucharest: European Institute of Romania
    Publication Date: 2016-05-13
    Keywords: ddc:330
    Language: Romanian
    Type: doc-type:workingPaper
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  • 2
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    Bucharest: The Bucharest University of Economic Studies
    Publication Date: 2017-09-30
    Description: The article identifies the extent to which the most valuable Romanian companies practice corporate social responsibility (CSR) and its beneficiaries. It describes the main areas of action and specific instruments of intervention. The data analysed cover the top 100 Romanian companies, as ranked by Ziarul Financiar. The corporate website of each company was analysed and subsequently codified on multiple variables. The results outline the fact that firms engage in CSR activities to a relatively high extent (49% of the companies). They adopt a vision of corporate social responsibility exclusively centred on the firm and the competitive advantages that derive from CSR activity. The wider community is represented as the primary stakeholder and beneficiary, whilst those stakeholders thought to influence the profit-making goals to a lesser extent are more often than not overlooked. Finally, companies prefer inexpensive intervention instruments and prove weak coordination with others social and political actors.
    Keywords: M14 ; O16 ; D01 ; D03 ; ddc:330 ; corporate social responsibility ; top 100 Romanian companies ; corporate social responsibility annual reports ; stakeholders
    Language: English
    Type: doc-type:article
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  • 3
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    MDPI Publishing
    In: Entropy
    Publication Date: 2014-11-29
    Description: In this paper, based on fixed entropy, the adiabatic equation of state in fractal flow is discussed. The local fractional wave equation for the velocity potential is also obtained by using the non-differential perturbations for the pressure and density of fractal hydrodynamics.
    Electronic ISSN: 1099-4300
    Topics: Chemistry and Pharmacology , Physics
    Published by MDPI Publishing
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  • 4
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    MDPI Publishing
    In: Entropy
    Publication Date: 2017-12-20
    Description: Entropy, Vol. 19, Pages 681: Chaos in a Cancer Model via Fractional Derivatives with Exponential Decay and Mittag-Leffler Law Entropy doi: 10.3390/e19120681 Authors: José Gómez-Aguilar María López-López Victor Alvarado-Martínez Dumitru Baleanu Hasib Khan In this paper, a three-dimensional cancer model was considered using the Caputo-Fabrizio-Caputo and the new fractional derivative with Mittag-Leffler kernel in Liouville-Caputo sense. Special solutions using an iterative scheme via Laplace transform, Sumudu-Picard integration method and Adams-Moulton rule were obtained. We studied the uniqueness and existence of the solutions. Novel chaotic attractors with total order less than three are obtained.
    Electronic ISSN: 1099-4300
    Topics: Chemistry and Pharmacology , Physics
    Published by MDPI Publishing
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  • 5
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    MDPI Publishing
    In: Entropy
    Publication Date: 2017-07-23
    Description: Entropy, Vol. 19, Pages 375: A Novel Numerical Approach for a Nonlinear Fractional Dynamical Model of Interpersonal and Romantic Relationships Entropy doi: 10.3390/e19070375 Authors: Jagdev Singh Devendra Kumar Maysaa Al Qurashi Dumitru Baleanu In this paper, we propose a new numerical algorithm, namely q-homotopy analysis Sumudu transform method (q-HASTM), to obtain the approximate solution for the nonlinear fractional dynamical model of interpersonal and romantic relationships. The suggested algorithm examines the dynamics of love affairs between couples. The q-HASTM is a creative combination of Sumudu transform technique, q-homotopy analysis method and homotopy polynomials that makes the calculation very easy. To compare the results obtained by using q-HASTM, we solve the same nonlinear problem by Adomian’s decomposition method (ADM). The convergence of the q-HASTM series solution for the model is adapted and controlled by auxiliary parameter and asymptotic parameter n. The numerical results are demonstrated graphically and in tabular form. The result obtained by employing the proposed scheme reveals that the approach is very accurate, effective, flexible, simple to apply and computationally very nice.
    Electronic ISSN: 1099-4300
    Topics: Chemistry and Pharmacology , Physics
    Published by MDPI Publishing
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  • 6
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    MDPI Publishing
    In: Entropy
    Publication Date: 2017-06-23
    Description: In this paper, we propose a new type (n + 1)-dimensional reduced differential transform method (RDTM) based on a local fractional derivative (LFD) to solve (n + 1)-dimensional local fractional partial differential equations (PDEs) in Cantor sets. The presented method is named the (n + 1)-dimensional local fractional reduced differential transform method (LFRDTM). First the theories, their proofs and also some basic properties of this procedure are given. To understand the introduced method clearly, we apply it on the (n + 1)-dimensional fractal heat-like equations (HLEs) and wave-like equations (WLEs). The applications show that this new technique is efficient, simply applicable and has powerful effects in (n + 1)-dimensional local fractional problems.
    Electronic ISSN: 1099-4300
    Topics: Chemistry and Pharmacology , Physics
    Published by MDPI Publishing
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  • 7
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    MDPI Publishing
    In: Entropy
    Publication Date: 2015-02-17
    Description: In this paper, we apply the concept of Caputo’s H-differentiability, constructed based on the generalized Hukuhara difference, to solve the fuzzy fractional differential equation (FFDE) with uncertainty. This is in contrast to conventional solutions that either require a quantity of fractional derivatives of unknown solution at the initial point (Riemann–Liouville) or a solution with increasing length of their support (Hukuhara difference). Then, in order to solve the FFDE analytically, we introduce the fuzzy Laplace transform of the Caputo H-derivative. To the best of our knowledge, there is limited research devoted to the analytical methods to solve the FFDE under the fuzzy Caputo fractional differentiability. An analytical solution is presented to confirm the capability of the proposed method.
    Electronic ISSN: 1099-4300
    Topics: Chemistry and Pharmacology , Physics
    Published by MDPI Publishing
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  • 8
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    MDPI Publishing
    In: Entropy
    Publication Date: 2018-04-10
    Description: Entropy, Vol. 20, Pages 259: An Efficient Computational Technique for Fractal Vehicular Traffic Flow Entropy doi: 10.3390/e20040259 Authors: Devendra Kumar Fairouz Tchier Jagdev Singh Dumitru Baleanu In this work, we examine a fractal vehicular traffic flow problem. The partial differential equations describing a fractal vehicular traffic flow are solved with the aid of the local fractional homotopy perturbation Sumudu transform scheme and the local fractional reduced differential transform method. Some illustrative examples are taken to describe the success of the suggested techniques. The results derived with the aid of the suggested schemes reveal that the present schemes are very efficient for obtaining the non-differentiable solution to fractal vehicular traffic flow problem.
    Electronic ISSN: 1099-4300
    Topics: Chemistry and Pharmacology , Physics
    Published by MDPI Publishing
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  • 9
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    MDPI Publishing
    In: Entropy
    Publication Date: 2018-05-21
    Description: Entropy, Vol. 20, Pages 384: Chaotic Attractors with Fractional Conformable Derivatives in the Liouville–Caputo Sense and Its Dynamical Behaviors Entropy doi: 10.3390/e20050384 Authors: Jesús Emmanuel Solís Pérez José Francisco Gómez-Aguilar Dumitru Baleanu Fairouz Tchier This paper deals with a numerical simulation of fractional conformable attractors of type Rabinovich–Fabrikant, Thomas’ cyclically symmetric attractor and Newton–Leipnik. Fractional conformable and β -conformable derivatives of Liouville–Caputo type are considered to solve the proposed systems. A numerical method based on the Adams–Moulton algorithm is employed to approximate the numerical simulations of the fractional-order conformable attractors. The results of the new type of fractional conformable and β -conformable attractors are provided to illustrate the effectiveness of the proposed method.
    Electronic ISSN: 1099-4300
    Topics: Chemistry and Pharmacology , Physics
    Published by MDPI Publishing
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  • 10
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    MDPI Publishing
    In: Entropy
    Publication Date: 2018-04-27
    Description: Entropy, Vol. 20, Pages 321: Finite Difference Method for Time-Space Fractional Advection–Diffusion Equations with Riesz Derivative Entropy doi: 10.3390/e20050321 Authors: Sadia Arshad Dumitru Baleanu Jianfei Huang Maysaa Mohamed Al Qurashi Yifa Tang Yue Zhao In this article, a numerical scheme is formulated and analysed to solve the time-space fractional advection–diffusion equation, where the Riesz derivative and the Caputo derivative are considered in spatial and temporal directions, respectively. The Riesz space derivative is approximated by the second-order fractional weighted and shifted Grünwald–Letnikov formula. Based on the equivalence between the fractional differential equation and the integral equation, we have transformed the fractional differential equation into an equivalent integral equation. Then, the integral is approximated by the trapezoidal formula. Further, the stability and convergence analysis are discussed rigorously. The resulting scheme is formally proved with the second order accuracy both in space and time. Numerical experiments are also presented to verify the theoretical analysis.
    Electronic ISSN: 1099-4300
    Topics: Chemistry and Pharmacology , Physics
    Published by MDPI Publishing
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