Survey of Enhancing Security of Cloud Using Fog Computing

Nowadays Fog Computing has become a vast research area in the domain of cloud computing. Due to its ability of extending the cloud services towards the edge of the network, reduced service latency and improved Quality of Services, which provides better user experience. However, the qualities of Fog Computing emerge new security and protection challenges. The Current security and protection estimations for cloud computing cannot be straightforwardly applied to the fog computing because of its portability and heterogeneity. So these issues in fog computing arises new research challenges and opportunities. This survey features about existing security concerns for fog computing and new proposed system to tackle some of the issues in fog computing related to security and privacy, thereby enhancing the cloud security

Semiconductor-metal transition in semiconducting bilayer sheets of transition metal dichalcogenides

Using first-principles calculations we show that the band gap of bilayer sheets of semiconducting transition metal dichalcogenides (TMDs) can be reduced smoothly by applying vertical compressive pressure. These materials undergo a universal reversible semiconductor to metal (S-M) transition at a critical pressure. S-M transition is attributed to lifting the degeneracy of the bands at fermi level caused by inter-layer interactions via charge transfer from metal to chalcogens. The S-M transition can be reproduced even after incorporating the band gap corrections using hybrid functionals and GW method. The ability to tune the band gap of TMDs in a controlled fashion over a wide range of energy, opens-up possibility for its usage in a range of applications.Comment: Accepted in Phys. Rev.

Impact of CSR on Firm Performance: The Moderating Role of Family Ownership in Individualistic & Collectivistic Countries

The objective of this study is to have a cross-country examination of the moderating role of family ownership on the corporate social responsibility (CSR) - financial performance (FP) relationship, also understanding how the moderating effect is influenced by cultural dimensions of collectivism and individualism. The study thereby incorporates views from both the Stakeholder theory and the Institutional theory. The study employs the one-way fixed effects regression analysis. Firm-year observations for the period of 2013 to 2022 of 439 firms across 35 countries are included. The magnitude of the interaction term is then inspected across the deemed collectivistic and individualistic cultures. The study finds that the degree of family ownership positively moderates the CSR-FP relationship and this moderation effect is stronger for collectivistic countries. The study is a novel approach to taking the CSR-FP subject with the family ownership moderating effect in a cross-country setting and it uniquely measures family ownership, not as the usual binary or subjective construct. The results of the study yield an interesting insight on the appropriate ownership structure for family members, and the status of legitimacy and trust family businesses can leverage with CSR to improve FP. Keywords: collectivism; corporate social responsibility (CSR); family ownership; financial performance (FP); individualismThe objective of this study is to have a cross-country examination of the moderating role of family ownership on the corporate social responsibility (CSR) - financial performance (FP) relationship, also understanding how the moderating effect is influenced by cultural dimensions of collectivism and individualism. The study thereby incorporates views from both the Stakeholder theory and the Institutional theory. The study employs the one-way fixed effects regression analysis. Firm-year observations for the period of 2013 to 2022 of 439 firms across 35 countries are included. The magnitude of the interaction term is then inspected across the deemed collectivistic and individualistic cultures. The study finds that the degree of family ownership positively moderates the CSR-FP relationship and this moderation effect is stronger for collectivistic countries. The study is a novel approach to taking the CSR-FP subject with the family ownership moderating effect in a cross-country setting and it uniquely measures family ownership, not as the usual binary or subjective construct. The results of the study yield an interesting insight on the appropriate ownership structure for family members, and the status of legitimacy and trust family businesses can leverage with CSR to improve FP. Keywords: collectivism; corporate social responsibility (CSR); family ownership; financial performance (FP); individualis

Quantum Kerr tunneling vacua on a (DDˉ)4(D{\bar D})_4-brane: An emergent Kerr black hole in five dimensions

We revisit a non-perturbative space-time curvature theory, underlying a two form U(1) gauge dynamics, on a D4-brane. In particular, two different gauge choices for a two form are explored underlying the dynamics of a geometric torsion in a second order formalism. We obtain two non-extremal quantum Kerr geometries in five dimensions on a pair of $(D{\bar D})_4$-brane in a type IIA superstring theory. The quantum vacua are described by a vanishing torsion in a gauge choice, underlying a geometric realization, on a non-BPS brane. It is argued that the quantum Kerr vacua undergo tunneling and lead to a five dimensional Kerr black hole in Einstein vacuum. A low energy limit in the quantum Kerr vacua further re-assures an emergent Kerr black hole.Comment: 21 pages, 8 figure