Search results

The aim of this paper is to assess the trend of changes of nutritional status and environmental quality of different decomposing organic wastes in different phases of vermicomposting utilizing an indigenous earthworm's species Perionyx excavatus.

Four different organic wastes were selected as basic ingredients for vermicompost production. Dried waste materials (2 kg) of each were mixed with dried cow dung and placed in experimental plastic trays with 60 individuals of selected earthworm species. Samples were collected from each tray at an interval of 15 days. Six trays were used: three were with both wastes, three trays having only wastes were treated as control.

Regression equation has shown the rate of change of nutrients – both in control and experiment vermicomposting units over time – which revealed significant changes of C, N, P and C/N ratio during different phases of vermicomposting.

Vermitechnology is now being considered as an eco‐friendly, user‐friendly and cost‐effective biotechnological tool for the conversion of decomposable organic wastes into valuable organic manure, ensuring pollution abatement, self employment and sustainability in agriculture.

The paper helps to identify the potential of locally available earthworm species and organic materials for the mass production of vermicompost involving local peoples and locally available bioresources.

The research aims to understand how smart speakers are perceived by their actual and potential users, their attitude towards smart speakers and consequently their intention to use them.

The authors apply a structural equation modelling (SEM) approach to test the research hypotheses through data coming from a structured questionnaire.

The results show that the higher the importance attributed to usefulness and ease of use, the higher the positive attitude that in turn positively affects the intention to use smart speakers. A significant relationship also emerged between task technology fit and attitude towards smart speakers, as well as between perceived enjoyment and attitude towards smart speakers. Perceived privacy risk, innovativeness and social attraction have been found to not significantly impact attitudes towards smart speakers.

Although several academic studies have focused on various aspects of smart technologies, only a few studies discuss the factors that push consumers to use smart speakers for activities related to commercial transactions. Therefore, looking at the rapid rise of smart speakers for daily tasks and the gradual acceptance of voice interaction with digital tools, the authors proposed a study about Italian users' intention to use smart speakers. Specifically, to fill the gap in the existing literature, the authors applied a SEM approach to identify utilitarian and hedonic benefits that motivate the use of these devices.

High packaging density in the present VLSI era builds an acute power crisis, which limits the use of MOSFET device as a constituent block in CMOS technology. This leads researchers in looking for alternative devices, which can replace the MOSFET in CMOS VLSI logic design. In a quest for alternative devices, tunnel field effect transistor emerged as a potential alternative in recent times. The purpose of this study is to enhance the performances of the proposed device structure and make it compatible with circuit implementation. Finally, the performances of that circuit are compared with CMOS circuit and a comparative study is made to find the superiority of the proposed circuit with respect to conventional CMOS circuit.

Silicon–germanium heterostructure is currently one of the most promising architectures for semiconductor devices such as tunnel field effect transistor. Analytical modeling is computed and programmed with MATLAB software. Two-dimensional device simulation is performed by using Silvaco TCAD (ATLAS). The modeled results are validated through the ATLAS simulation data. Therefore, an inverter circuit is implemented with the proposed device. The circuit is simulated with the Tanner EDA tool to evaluate its performances.

The proposed optimized device geometry delivers exceptionally low OFF current (order of 10^−18 A/um), fairly high ON current (5x10^−5 A/um) and a steep subthreshold slope (20 mV/decade) followed by excellent ON–OFF current ratio (order of 10^13) compared to the similar kind of heterostructures. With a very low threshold voltage, even lesser than 0.1 V, the proposed device emerged as a good replacement of MOSFET in CMOS-like digital circuits. Hence, the device is implemented to construct a resistive inverter to study the circuit performances. The resistive inverter circuit is compared with a resistive CMOS inverter circuit. Both the circuit performances are analyzed and compared in terms of power dissipation, propagation delay and power-delay product. The outcomes of the experiments prove that the performance matrices of heterojunction Tunnel FET (HTFET)-based inverter are way ahead of that of CMOS-based inverter.

Germanium–silicon HTFET with stack gate oxide is analytically modeled and optimized in terms of performance matrices. The device performances are appreciable in comparison with the device structures published in contemporary literature. CMOS-like resistive inverter circuit, implemented with this proposed device, performs well and outruns the circuit performances of the conventional CMOS circuit at 45-nm technological node.

We examine how the degree of regional financial integration in African stock markets has evolved over the last eleven years. Despite increasing regional economic cooperation, the process of stock market integration has been slow. To facilitate growth via developed financial markets but keep financial stability risk at a minimum, further regional integration should be promoted, and mild capital controls on non-African investors may be necessary. A Diebold-Yilmaz spillover analysis is applied to ten African stock markets for the period between August 2004 and January 2015. We examine spillovers among four regions and among individual countries. Regional integration, as measured by total spillovers in Africa, is increasing but remains very low. These spillovers were temporarily heightened during the global financial crisis. Cross-regional spillovers are high between Northern and Southern Africa. Asymmetric capital controls on African and non-African investors must be considered to foster further regional integration and to mitigate financial stability risk. This is one of the few studies to address the construction of the future architecture of regionally integrated stock markets in emerging countries.

After a successful discussion and analysis of the case, the participants will be able to distinguish and appreciate the situations of conflict of interest (COI), whistle-blowing, etc. Initiate appropriate methods to avoid/minimize the impact of COI and ensure justice and fair-play to all stake-holders. Identify and appreciate the work-context of each executive-position and initiate standard operating procedures to protect the interests of the enterprise and all its stakeholders. Appreciate the relevance of whistle-blowing and to initiate appropriate methods to ensure justice and fair-play to all stake-holders.

In the context of the Industrial Credit and Investment Corporation of India (ICICI)-bank, the systemic inadequacies seemed to have failed in preventing the incidences of COI. The organization was too centralized to be able to respond proactively to the allegations. The case lays bare the inadequacy of professionalism among the media in responding promptly to such instances. The case generalizes that, with increasing globalization, such incidences have global ramifications and the organizations face much greater risks than ever. The case concludes that to emerge as a mature and leading organization in the global market, ICICI-bank needed to strengthen various aspects of corporate governance; similarly to emerge as a developed economy, India needed to develop independent watchdogs to monitor the activities of corporations continuously. Media needed to be independent and mature to fulfil its duty of continuous and transparent communication to the public.

The case can be understood and analysed by management students in the post-graduate level or by working executives with at least four to five years of experience in the corporate sector.

Teaching notes are available for educators only.

CSS 11: Strategy.

Kolkata Port (KoPT) had achieved a turnaround from having made a loss of Rs 7.5 crores (cr) in the year 2000–01 to a net surplus of Rs 465.1 cr in the year 2006–07. A variety of initiatives had been taken during the intervening years with a focus on tariff rationalization, revenues from alternate sources, infrastructure development and productivity improvements. While these had yielded results, there was a fundamental issue of operational complexity and inability to compete due to the locational disadvantage. KoPT was a riverine port with two locations, 232 kms and 115 kms upstream on the Hooghly with draft limitations.

Two significant studies having implications for future strategies of KoPT had recently been submitted in March and November 2007. The top management of the port, including the Chairman who was responsible for driving many of the initiatives, was concerned that it may not be possible to achieve long term sustainable growth continuing with the strategies used so far. A well thought out future roadmap, breaking away from the present thinking, was essential sustained growth.

This study investigates the perceptions of leadership of African American undergraduate males who attend a predominately-White institution in the Southwest after participation in a leadership development program. Research concerning African American undergraduate males in education has been from a deficit-orientated narrative and focused primarily on academic achievement or lack of involvement, with little attention paid to African American males performing leadership. As society continues to focus on graduation and college attendance by African American males, it is important to explore African American undergraduate male leadership as a viable method to engage and influence graduation and attendance. This study examines the way in which African American undergraduate males make meaning and define leadership. Results indicated that African American undergraduate males defined leadership as either leader behaviors or specific characteristics that leaders possess. The study indicates a need for leadership educators and student affairs professionals to develop and implement a common language concerning leadership with student leader

This book aimed to conceptualise a construction workforce management model suitable for effectively managing workers in construction organisations. To this end, this chapter presents the conceptualised model, which consists of seven workforce management practices with their respective measurement variables. Drawing from existing theories, models, and practices, the chapter concludes that a construction organisation that will attain its strategic objectives in the current fourth industrial revolution era must be willing to promote effective recruitment and selection, compensation and benefits, performance management and appraisal, employee involvement and empowerment, training and development, as well as improving workers emotional intelligence and handling external environment pressure. These practices can promote proactiveness, participation, and improved skills and can lead to effective commitment, better quality, and flexibility within the organisation.

The purpose of this study is to develop a novel general mathematical model to find the optimal product mix of commercial graphite products, which has a complex production process with alternative sub-processes in the graphite mining production process.

The network optimization was adopted to model the complex graphite mining production process through the optimal allocation of raw graphite, byproducts, and saleable products with comparable sub-processes, which has different processing capacities and costs. The model was tested on a selected graphite manufacturing company, and the optimal graphite product mix was determined through the selection of the optimal production process. In addition, sensitivity and scenario analyses were carried out to accommodate uncertainties and to facilitate further managerial decisions.

The selected graphite mining company mines approximately 400 metric tons of raw graphite per month to produce ten types of graphite products. According to the optimum solution obtained, the company should produce only six graphite products to maximize its total profit. In addition, the study demonstrated how to reveal optimum managerial decisions based on optimum solutions.

This study has made a significant contribution to the graphite manufacturing industry by modeling the complex graphite mining production process with a network optimization technique that has yet to be addressed at this level of detail. The sensitivity and scenario analyses support for further managerial decisions.