North Eastern Hill University

About: North Eastern Hill University is a education organization based out in Shillong, Meghalaya, India. It is known for research contribution in the topics: Population & Ruthenium. The organization has 2318 authors who have published 4476 publications receiving 48894 citations.

Electronic and optical properties of 2D monolayer (ML) MoS2 with vacancy defect at S sites

Abstract: Herein, we have studied the electronic and optical properties of S-sites vacancy defect monolayer (ML) MoS 2 from density functional theory (DFT) based on the linear combination of atomic orbitals (LCAO). ML-MoS 2 is an intrinsic semiconductor having direct electronic band gap of ∼ 1.82 eV. This system is highly sensitive to vacancy defect due to the significant changes in characteristics of fully occupied and unoccupied orbitals near Fermi energy ( E F ). On increasing the concentration of random vacancy defects ML-MoS 2 exhibits a diminishing semiconducting band gap. Also the profile of electronic band gap changes from direct to indirect as well as the shifting of the E F . The semiconducting behaviour is preserved up to 25% vacancy defects, above which occurs a semiconductor-metal transition. These features arise due to the Mo-d and S-p states and attributed to the photoluminescence for making MoS 2 a promising material for opto-electronic devices. To investigate the opto-electronic response we have calculated the dielectric function ( ϵ ), refractive index ( n ), and absorption coefficient ( α ) as a function of incident photon energy ( ħ ω ).

Capital regulation, competition and risk-taking behavior of Indian banks in a simultaneous approach

Abstract: The purpose of this paper is to investigate the association between capital regulation and risk-taking behavior of Indian banks after incorporating the influence of competition. Further, the study intends to enrich the existing literature by providing empirical evidence on the role of human resources in managing risk along with the influence of other bank specific and macroeconomic variables.,Secondary data on 39 listed Indian commercial banks are collected from “Capitaline Plus” corporate data database for a period of 15 years. Capital is measured by capital adequacy ratio as defined by the regulators, and two definitions of risk – credit risk and insolvency risk – are employed. Competition is measured by Herfindahl-Hirschman deposits index, concentration ratio and H-statistic. The value-added intellectual coefficient model is employed to compute human capital efficiency (HCE). Three-stage least squares technique in a simultaneous equation framework is used to estimate the coefficients.,The study finds that absolute level of regulatory capital and bank risk are positively associated, although the influence of capital on risk is not statistically significant. The influence of competition on risk is negative for all the models, which supports the “competition stability” view. The impact of human capital on bank risk is also negative for all cases.,The findings of the study are useful for the decision makers in several ways based on the inverse influence of competition and HCE on bank risk. Further, the observed positive association between capital and risk indicates that the capital regulation is not sufficient to enhance the stability in the banking sector.,This is the first study in the Indian context that incorporates the competition in the banking industry as an explanatory variable in the extant bank capital and risk relationship.