Branding in Bangladesh: a historical perspective

Volume 3, Issue 2, July 201

THE MEDIATING ROLE OF PSYCHOLOGICAL EMPOWERMENT IN THE RELATIONSHIP BETWEEN HIGH-PERFORMANCE WORK SYSTEMS AND ORGANIZATIONAL CITIZENSHIP BEHAVIOR

This study develops a mediation model in which high-performance work systems (HPWS) affect organizational citizenship behavior through psychological empowerment. Using a sample of 247 employees employed by three large manufacturing firms in Bangladesh, results from structural equation modeling and hierarchical regression analyses showed that psychological empowerment mediated the relationship between HPWS and organizational citizenship behavior. The theoretical and practical implications of these findings are discussed

THE MEDIATING ROLE OF PSYCHOLOGICAL EMPOWERMENT IN THE RELATIONSHIP BETWEEN HIGH-PERFORMANCE WORK SYSTEMS AND ORGANIZATIONAL CITIZENSHIP BEHAVIOR

This study develops a mediation model in which high-performance work systems (HPWS) affect organizational citizenship behavior through psychological empowerment. Using a sample of 247 employees employed by three large manufacturing firms in Bangladesh, results from structural equation modeling and hierarchical regression analyses showed that psychological empowerment mediated the relationship between HPWS and organizational citizenship behavior. The theoretical and practical implications of these findings are discussed

THE RELATIONSHIP BETWEEN HIGH-PERFORMANCE WORK SYSTEMS AND PROACTIVE BEHAVIORS: THE MEDIATING ROLE OF PERCEIVED ORGANIZATIONAL SUPPORT

Drawing on social exchange theory, this study explores the relationship between high-performance work systems (HPWS) and proactive work behavior. We also examined whether perceived organizational support (POS) mediated the effects of HPWS on supervisor ratings of followers’ proactive behavior. The results from structural equation modeling and hierarchical regression analyses showed that HPWS were positively related to proactive behavior. The results also suggest that POS mediated the relationship between HPWS and proactive behavior. The theoretical and practical implications of these findings are discussed

THE RELATIONSHIP BETWEEN HIGH-PERFORMANCE WORK SYSTEMS AND PROACTIVE BEHAVIORS: THE MEDIATING ROLE OF PERCEIVED ORGANIZATIONAL SUPPORT

Drawing on social exchange theory, this study explores the relationship between high-performance work systems (HPWS) and proactive work behavior. We also examined whether perceived organizational support (POS) mediated the effects of HPWS on supervisor ratings of followers’ proactive behavior. The results from structural equation modeling and hierarchical regression analyses showed that HPWS were positively related to proactive behavior. The results also suggest that POS mediated the relationship between HPWS and proactive behavior. The theoretical and practical implications of these findings are discussed

Graphene Stuctures For Energy Storage Application

Energy storage devices are receiving extensive attention in recent years due to the increasing demand of energy. Super-capacitor is one of the energy storage devices with high specific power density and wide applications in electronic vehicles, commercial mobile electronics, and military devices. Carbon based materials are widely used in making Electrochemical Double Layer Capacitor (EDLC) or super-capacitor for their excellent porous nature along with their electron transport capability. By increasing the specific surface area of the porous carbon materials, specific capacitance of the super-capacitor can be significantly improved. Graphene, a newly discovered material, has been incorporated in making super-capacitor electrodes for its extraordinary electrical properties with highly conductive specific surface area. Recently, nanowire/graphene hybrids have been developed for the enhancement of super-capacitor performance; however, all previous efforts employed nanowires on graphene in a randomly distributed fashion, which limits the performance. Therefore, this thesis demonstrates a new approach by growing aligned nanowire on graphene aerogel to further improve the performance. This nanowire/graphene aerogel hybrid not only uses the high surface area of the graphene aerogel but also increases the specific surface area for electrode-electrolyte interaction. Therefore, this new nanowire/graphene aerogel hybrid electrode material could enhance the specific capacity. Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), and Atomic Force Microscopy (AFM) are used for materials characterization. Potentio-galvanostat and LCR meter are used for measuring electrical performance of the super-capacitor. The testing results have shown that with graphene/nanowire hybrid electrodes, the performance of the super-capacitor could be significantly improved

Graphene structures for energy storage application

Energy storage devices are receiving extensive attention in recent years due to the increasing demand of energy. Super-capacitor is one of the energy storage devices with high specific power density and wide applications in electronic vehicles, commercial mobile electronics, and military devices. Carbon based materials are widely used in making Electrochemical Double Layer Capacitor (EDLC) or super-capacitor for their excellent porous nature along with their electron transport capability. By increasing the specific surface area of the porous carbon materials, specific capacitance of the super-capacitor can be significantly improved. Graphene, a newly discovered material, has been incorporated in making super-capacitor electrodes for its extraordinary electrical properties with highly conductive specific surface area. Recently, nanowire/graphene hybrids have been developed for the enhancement of super-capacitor performance; however, all previous efforts employed nanowires on graphene in a randomly distributed fashion, which limits the performance. Therefore, this thesis demonstrates a new approach by growing aligned nanowire on graphene aerogel to further improve the performance. This nanowire/graphene aerogel hybrid not only uses the high surface area of the graphene aerogel but also increases the specific surface area for electrode-electrolyte interaction. Therefore, this new nanowire/graphene aerogel hybrid electrode material could enhance the specific capacity. Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), and Atomic Force Microscopy (AFM) are used for materials characterization. Potentio-galvanostat and LCR meter are used for measuring electrical performance of the super-capacitor. The testing results have shown that with graphene/nanowire hybrid electrodes, the performance of the super-capacitor could be significantly improved

Hybrid Nano-Structure For Enhanced Energy Storage Devices

The goal of this research is to develop electrode materials using various nano-structure hybrids for improved energy storage devices. Enhancing the performance of energy storage device has been gaining tremendous attention since it holds the key solution to advance renewable energy usage thus reduce the consumption of fossil fuels. The application of energy storage devices such as super-capacitor and Li-ion-battery has seen significant growth; however, it is still limited mainly by charge/discharge rate and energy density. One of the solutions is to use nano-structure materials, which offer higher power at high energy density and improved stability during the charge discharge cycling of ions in and out of the storage electrode material. In this research, carbon-based materials (e.g. porous carbon, graphene) in conjunction with metal oxides such as CeO2 nanoparticles/TiO2 nanowires are synthesized utilizing low temperature hydrothermal method for the fabrication of advanced electrode materials. Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), X-ray Diffraction (XRD), Thermogravimetric Analysis (TGA), X-ray Photoelectron Spectroscopy (XPS), and Fourier Transformation Infrared Spectroscopy (FTIR) were used for materials characterization. Poentio-galvanostat, battery analyzer, and Electrochemical Impedance Spectroscopy (EIS) were used for evaluating the electrochemical performance. The testing results have shown that a maximum 500% higher specific capacitance could be obtained using porous carbon/CeO2 instead of porous carbon for super-capacitor application and microwave exfoliated graphene oxide/TiO2 nanowire hybrid provides up to 80% increment of specific capacity compared to porous carbon anode for Li-ion-battery application

Investigating the Relationship between Green Supply Chain Management and Organizational Performance: An Empirical Study from Bangladeshi Perspective

Despite widespread agreement on the significance of organizational performance, little attention has been devoted to investigating its determinants in the context of manufacturing organizations in Bangladesh. As a result, the purpose of this research is to determine the effect of green supply chain management on organizational performance in the manufacturing companies of Bangladesh. A total of 211 respondents from the Bangladeshi manufacturing industry, including supply chain supervisors, managers, and directors, were gathered for this study. Using two independent variables, including green innovation and green process, we were able to assess green supply chain practices, while organizational performance was evaluated using two dependent variables, including environmental performance and financial performance. The SPSS (Statistical Package for Social Sciences) 24.0 program was used to gather demographic information of the respondents, and Smart PLS (version 3.3.3) was utilized to test the research hypotheses. The findings showed that there is a statistically significant positive connection between GSCM and organizational performance. The results of the research have certain implications for practitioners, which are discussed further in the paper. In addition, we addressed research constraints as well as potential study topics for the future