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Adoption of Information Technology Platforms : The Case of Apple iPhone versus Google Android
Anol Bhattacherjee,Jaeki Song,JongHyung Park 한국경영정보학회 2010 한국경영정보학회 학술대회논문집 Vol.2010 No.1
Prior research on information technology (IT) adoption has mostly examined adoption of independent individual or organizational IT such as spreadsheets, electronic mails, and relational databases, with little attention to the adoption of IT platforms such as Java2, Apple iPhone, or Google Andriod. IT platforms are general purpose technologies that can be used to family of applications to perform specific individual or organizational tasks. Adoption of such platforms are different from the adoption of independent IT in that the former require substantial upfront knowledge investments and the potential benefits from such adoption depends on network externalities that are generally unknown in advance. For these reasons, traditional IT adoption research based on innovation diffusion theory can provide only limited explanation of the adoption of technology platforms, and should be augmented with network externality and knowledge barrier perspectives. This research employs an interpretive research approach to examine these and other reasons that can explain IT platform adoption. We interview application developers regarding their choice of Apple iPhone and Google Andriod platforms, code their responses using open, axial, and selective coding, and use our findings to postulate a theoretical model of IT platform adoption.
Role of dissipation in the stability of a parametrically driven quantum harmonic oscillator
Chaki Subhasish,Bhattacherjee Aranyabhuti 한국물리학회 2021 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.79 No.7
We study the dissipative dynamics of a single quantum harmonic oscillator subjected to parametric driving within an effective Hamiltonian approach. Using the Liouville–von Neumann approach, we show that the time evolution of a parametrically driven dissipative quantum oscillator has a strong connection with the classical, damped Mathieu equation. Based on the numerical analysis of the Monodromy matrix, we demonstrate that the dynamical instability generated by the parametric driving is reduced by the effect of dissipation. Furthermore, we obtain a closed relationship between the localization of the Wigner function and the stability of the damped Mathieu equation.
Dasgupta, Pallabi,Bhattacherjee, Sharmistha,Das, Dilip Kumar The Korean Society for Preventive Medicine 2016 예방의학회지 Vol.49 No.4
Objectives: Human immunodeficiency virus (HIV)/acquired immunodeficiency syndrome (AIDS) adversely impacts food security in households of people living with HIV/AIDS (PLWHA). Little research has focused on food insecurity among PLWHA in India. The purpose of this study was to identify the prevalence of and factors relating to food security in households of PLWHA in the Siliguri subdivision of Darjeeling, West Bengal, India. Methods: A cross-sectional community-based study was carried out among 173 PLWHA residing in Siliguri and registered at the Anti-retroviral Therapy Centre of North Bengal Medical College & Hospital. Data was collected at the household level with interviews of PLWHA using a food security survey instrument. We analyzed the associations using logistic regression. Results: The prevalence of household food security among the participants was 50.9% (88/173). Five years or more of schooling, higher socioeconomic class and males were found to be significantly associated with a higher likelihood of food security. A later stage of the disease and the presence of other family members with HIV/AIDS were significantly associated with a lower likelihood of food security. The major coping strategies to deal with food insecurity in the acute phase HIV infection included borrowing money (56.1%), followed by spousal support, loans from microfinance institutions, banks, or money lenders, borrowing food, or selling agricultural products. Conclusions: The present study revealed that only about half of households with PLWHA were food secure. Prior interventions relating to periods of food and economic crisis as well as strategies for sustaining food security and economic status are needed in this area.
Pallabi Dasgupta,Sharmistha Bhattacherjee,Dilip Kumar Das 대한예방의학회 2016 예방의학회지 Vol.49 No.4
Objectives: Human immunodeficiency virus (HIV)/acquired immunodeficiency syndrome (AIDS) adversely impacts food security in households of people living with HIV/AIDS (PLWHA). Little research has focused on food insecurity among PLWHA in India. The purpose of this study was to identify the prevalence of and factors relating to food security in households of PLWHA in the Siliguri subdivision of Darjeeling, West Bengal, India. Methods: A cross-sectional community-based study was carried out among 173 PLWHA residing in Siliguri and registered at the Anti-retroviral Therapy Centre of North Bengal Medical College & Hospital. Data was collected at the household level with interviews of PLWHA using a food security survey instrument. We analyzed the associations using logistic regression. Results: The prevalence of household food security among the participants was 50.9% (88/173). Five years or more of schooling, higher socioeconomic class and males were found to be significantly associated with a higher likelihood of food security. A later stage of the disease and the presence of other family members with HIV/AIDS were significantly associated with a lower likelihood of food security. The major coping strategies to deal with food insecurity in the acute phase HIV infection included borrowing money (56.1%), followed by spousal support, loans from microfinance institutions, banks, or money lenders, borrowing food, or selling agricultural products. Conclusions: The present study revealed that only about half of households with PLWHA were food secure. Prior interventions relating to periods of food and economic crisis as well as strategies for sustaining food security and economic status are needed in this area.
Dhanjee Kumar Chaudhary,Ashis Bhattacherjee,Aditya Kumar Patra,Nearkasen Chau 한국산업안전보건공단 산업안전보건연구원 2015 Safety and health at work Vol.6 No.4
Background: This study aimed to assess the whole-body vibration (WBV) exposure among large blast hole drill machine operators with regard to the International Organization for Standardization (ISO) recommended threshold values and its association with machine- and rock-related factors and workers’ individual characteristics. Methods: The study population included 28 drill machine operators who had worked in four opencast iron ore mines in eastern India. The study protocol comprised the following: measurements of WBV exposure [frequency weighted root mean square (RMS) acceleration (m/s2)], machine-related data (manufacturer of machine, age of machine, seat height, thickness, and rest height) collected from mine management offices, measurements of rock hardness, uniaxial compressive strength and density, and workers’ characteristics via face-to-face interviews. Results: More than 90% of the operators were exposed to a higher level WBV than the ISO upper limit and only 3.6% between the lower and upper limits, mainly in the vertical axis. Bivariate correlations revealed that potential predictors of total WBV exposure were: machine manufacturer (r ¼ 0.453, p ¼ 0.015), age of drill (r ¼ 0.533, p ¼ 0.003), and hardness of rock (r ¼ 0.561, p ¼ 0.002). The stepwise multiple regression model revealed that the potential predictors are age of operator (regression coefficient b ¼ ?0.052, standard error SE ¼ 0.023), manufacturer (b ¼ 1.093, SE ¼ 0.227), rock hardness (b ¼ 0.045, SE ¼ 0.018), uniaxial compressive strength (b ¼ 0.027, SE ¼ 0.009), and density (b ¼ e1.135, SE ¼ 0.235). Conclusion: Prevention should include using appropriate machines to handle rock hardness, rock uniaxial compressive strength and density, and seat improvement using ergonomic approaches such as including a suspension system.