International Journal of Applied and Basic Medical Research, 2015
Background: Reaction time (RT) is a measure of the response to a stimulus. RT plays a very import... more Background: Reaction time (RT) is a measure of the response to a stimulus. RT plays a very important role in our lives as its practical implications may be of great consequences. Factors that can affect the average human RT include age, sex, left or right hand, central versus peripheral vision, practice, fatigue, fasting, breathing cycle, personality types, exercise, and intelligence of the subject. Aim: The aim was to compare visual RTs (VRTs) and auditory RTs (ARTs) on the basis of gender and physical activity levels of medical 1 st year students. Materials and Methods: The present cross-sectional study was conducted on 120 healthy medical students in age group of 18-20 years. RT for target stimulus that is, for the beep tone for measuring ART, and red circle for measuring VRT was determined using Inquisit 4.0 (Computer Software) in the laptop. The task was to press the spacebar as soon as the stimulus is presented. Five readings of each stimulus were taken, and their respective fastest RT's for each stimuli were recorded. Statistical analysis was done. Results: In both the sexes' RT to the auditory stimulus was significantly less (P < 0.001) as compared to the visual stimulus. Significant difference was found between RT of male and female medical students (P < 0.001) as well as between sedentary and regularly exercising healthy medical 1 st year students. Conclusion: The ART is faster than the VRT in medical students. Furthermore, male medical students have faster RTs as compared to female medical students for both auditory as well as visual stimuli. Regularly exercising medical students have faster RTs when compared with medical students with sedentary lifestyles.
A firm making quantity decision under uncertainty loses profit if its private information is leak... more A firm making quantity decision under uncertainty loses profit if its private information is leaked to competitors. Outsourcing increases this risk as a third party supplier may leak information for its own benefit. The firm may choose to conceal information from the competitors by entering in a confidentiality agreement with the supplier. This, however, diminishes the firm's ability to dampen competition by signaling a higher quantity commitment. We examine this trade‐off in a stylized supply chain in which two firms, endowed with private demand information, order sequentially from a common supplier, and engage in differentiated quantity competition. In our model, the supplier can set different wholesale prices for firms, and the second‐mover firm could be better informed. Contrary to what is expected, information concealment is not always beneficial to the first mover. We characterize conditions under which the first mover firm will not prefer concealing information. We show t...
International Conference on Advanced Nanomaterials & Emerging Engineering Technologies, 2013
ABSTRACT This paper presents the study of alignment of single walled carbon nanotubes (SWCNT) usi... more ABSTRACT This paper presents the study of alignment of single walled carbon nanotubes (SWCNT) using AC dielectrophoresis. The simulations of AC dielectrophoresis have been done using MATLAB code. The alignment of SWCNTs has been simulated for different diameters.
A number of significant developments towards the management of psychosocial risks have been achie... more A number of significant developments towards the management of psychosocial risks have been achieved at the policy level in the European Union (EU) since the introduction of the 1989 European Commission Council Framework Directive 89/391/EEC on Safety and Health of Workers ...
Catheterization and Cardiovascular Diagnosis, 1995
The management of three cases of coronary artery rupture is described: (1) after high‐pressure ba... more The management of three cases of coronary artery rupture is described: (1) after high‐pressure balloon angioplasty following uneventful placement of three Gianturco‐Roubin stents, (2) following balloon angioplasty of an occluded diagonal branch, and (3) subsequent to rotational ablation of a left main and proximal circumflex arteries. Placement of an autologous veincovered Palmaz stent or microcoil embolic vessel occlusion solved each problem. In each case, emergency surgery was avoided; subsequent management, including anticoagulation (when indicated), was performed without incident. This is the first communication detailing correction of a coronary vessel rupture with an autologous vein‐covered stent or by microcoil embolic vessel occlusion.
There exists a substantial degree of diversity across strategies to prevent and manage work-relat... more There exists a substantial degree of diversity across strategies to prevent and manage work-related psychosocial risks and their associated health effects. Whereas it is common to distinguish between organizational and individual interventions, the important level of policy-level interventions has been largely neglected in the mainstream academic literature. Despite a number of significant developments towards the management of psychosocial risks that
Manufacturing & Service Operations Management, 2010
We analyze a continuous review (Q, r) stochastic inventory model in which orders placed with a ma... more We analyze a continuous review (Q, r) stochastic inventory model in which orders placed with a make-to-order manufacturer can be shipped via two alternative freight modes differing in lead time and costs. The costs of placing an order and using each freight mode consist of fixed components and hence exhibit economies of scale. We derive an optimal policy for using the two freight modes for shipping each order. This freight-mode decision is delayed until manufacturing is complete and the optimal policy uses information about the demand incurred in the meantime. Furthermore, given that the two freight modes are used optimally for shipping each order, we solve our model for reorder point and order quantity that minimizes cost. We analyze the cost savings achieved from postponing the freight-mode decision and provide analytical and numerical comparisons between the solutions to our two-freight model and single-freight models. Finally, we illustrate the properties of the solution to our ...
The Development of the European Framework for Psychosocial Risk Management: PRIMA‐EF: Stavroula L... more The Development of the European Framework for Psychosocial Risk Management: PRIMA‐EF: Stavroula Leka, et al. Institute of Work, Health and Organisations, University of Nottingham, UK—Aim: This paper presents the development process of the European framework for psychosocial risk management (PRIMA‐EF). It also summarises and discusses key indings of research conducted through this policy‐orientated research programme.ObjectivesThis paper presents an overview of the development process of PRIMA‐EF. The background, methods and outcomes are described and discussed. The paper summarises the key findings of PRIMA‐EF and concludes by a discussion of the merit of PRIMA‐EF in the area of psychosocial risk management and its intended use. PRIMA‐EF has been built on a review, critical assessment, reconciliation and harmonisation of existing European approaches for the management of psychosocial risks and the promotion of mental health at the workplace. The framework has been built from a theor...
In this brief report, we provide normal reference ranges for PR duration [unadjusted and heart ra... more In this brief report, we provide normal reference ranges for PR duration [unadjusted and heart rate adjusted] and P-wave indices [duration, amplitude and terminal force in V1] in individuals free of cardiovascular disease and its risk factors. We used automatically processed digital ECG data from 1252 US participants [mean age 59 (± 10) years, 738 women, 588 whites, 207 African-Americans, 217 Hispanics, 240 Chinese] from the Multi-Ethnic Study of Atherosclerosis [MESA]. In multivariable adjusted linear regression models with PR and each P-wave variable as a separate outcome, significant age, sex and race differences in these markers were observed. Subsequently, we report reference ranges for abnormal [2 nd and 98 th percentiles], borderline abnormal [5 th and 95 th percentiles] and mean [SD] values of PR and P-wave indices stratified by age [middle age (45-64 years) and seniors (65-84 years)], sex [men and women] and race [whites, African Americans, Hispanics and Chinese].
International Journal of Applied and Basic Medical Research, 2015
Background: Reaction time (RT) is a measure of the response to a stimulus. RT plays a very import... more Background: Reaction time (RT) is a measure of the response to a stimulus. RT plays a very important role in our lives as its practical implications may be of great consequences. Factors that can affect the average human RT include age, sex, left or right hand, central versus peripheral vision, practice, fatigue, fasting, breathing cycle, personality types, exercise, and intelligence of the subject. Aim: The aim was to compare visual RTs (VRTs) and auditory RTs (ARTs) on the basis of gender and physical activity levels of medical 1 st year students. Materials and Methods: The present cross-sectional study was conducted on 120 healthy medical students in age group of 18-20 years. RT for target stimulus that is, for the beep tone for measuring ART, and red circle for measuring VRT was determined using Inquisit 4.0 (Computer Software) in the laptop. The task was to press the spacebar as soon as the stimulus is presented. Five readings of each stimulus were taken, and their respective fastest RT's for each stimuli were recorded. Statistical analysis was done. Results: In both the sexes' RT to the auditory stimulus was significantly less (P < 0.001) as compared to the visual stimulus. Significant difference was found between RT of male and female medical students (P < 0.001) as well as between sedentary and regularly exercising healthy medical 1 st year students. Conclusion: The ART is faster than the VRT in medical students. Furthermore, male medical students have faster RTs as compared to female medical students for both auditory as well as visual stimuli. Regularly exercising medical students have faster RTs when compared with medical students with sedentary lifestyles.
A firm making quantity decision under uncertainty loses profit if its private information is leak... more A firm making quantity decision under uncertainty loses profit if its private information is leaked to competitors. Outsourcing increases this risk as a third party supplier may leak information for its own benefit. The firm may choose to conceal information from the competitors by entering in a confidentiality agreement with the supplier. This, however, diminishes the firm's ability to dampen competition by signaling a higher quantity commitment. We examine this trade‐off in a stylized supply chain in which two firms, endowed with private demand information, order sequentially from a common supplier, and engage in differentiated quantity competition. In our model, the supplier can set different wholesale prices for firms, and the second‐mover firm could be better informed. Contrary to what is expected, information concealment is not always beneficial to the first mover. We characterize conditions under which the first mover firm will not prefer concealing information. We show t...
International Conference on Advanced Nanomaterials & Emerging Engineering Technologies, 2013
ABSTRACT This paper presents the study of alignment of single walled carbon nanotubes (SWCNT) usi... more ABSTRACT This paper presents the study of alignment of single walled carbon nanotubes (SWCNT) using AC dielectrophoresis. The simulations of AC dielectrophoresis have been done using MATLAB code. The alignment of SWCNTs has been simulated for different diameters.
A number of significant developments towards the management of psychosocial risks have been achie... more A number of significant developments towards the management of psychosocial risks have been achieved at the policy level in the European Union (EU) since the introduction of the 1989 European Commission Council Framework Directive 89/391/EEC on Safety and Health of Workers ...
Catheterization and Cardiovascular Diagnosis, 1995
The management of three cases of coronary artery rupture is described: (1) after high‐pressure ba... more The management of three cases of coronary artery rupture is described: (1) after high‐pressure balloon angioplasty following uneventful placement of three Gianturco‐Roubin stents, (2) following balloon angioplasty of an occluded diagonal branch, and (3) subsequent to rotational ablation of a left main and proximal circumflex arteries. Placement of an autologous veincovered Palmaz stent or microcoil embolic vessel occlusion solved each problem. In each case, emergency surgery was avoided; subsequent management, including anticoagulation (when indicated), was performed without incident. This is the first communication detailing correction of a coronary vessel rupture with an autologous vein‐covered stent or by microcoil embolic vessel occlusion.
There exists a substantial degree of diversity across strategies to prevent and manage work-relat... more There exists a substantial degree of diversity across strategies to prevent and manage work-related psychosocial risks and their associated health effects. Whereas it is common to distinguish between organizational and individual interventions, the important level of policy-level interventions has been largely neglected in the mainstream academic literature. Despite a number of significant developments towards the management of psychosocial risks that
Manufacturing & Service Operations Management, 2010
We analyze a continuous review (Q, r) stochastic inventory model in which orders placed with a ma... more We analyze a continuous review (Q, r) stochastic inventory model in which orders placed with a make-to-order manufacturer can be shipped via two alternative freight modes differing in lead time and costs. The costs of placing an order and using each freight mode consist of fixed components and hence exhibit economies of scale. We derive an optimal policy for using the two freight modes for shipping each order. This freight-mode decision is delayed until manufacturing is complete and the optimal policy uses information about the demand incurred in the meantime. Furthermore, given that the two freight modes are used optimally for shipping each order, we solve our model for reorder point and order quantity that minimizes cost. We analyze the cost savings achieved from postponing the freight-mode decision and provide analytical and numerical comparisons between the solutions to our two-freight model and single-freight models. Finally, we illustrate the properties of the solution to our ...
The Development of the European Framework for Psychosocial Risk Management: PRIMA‐EF: Stavroula L... more The Development of the European Framework for Psychosocial Risk Management: PRIMA‐EF: Stavroula Leka, et al. Institute of Work, Health and Organisations, University of Nottingham, UK—Aim: This paper presents the development process of the European framework for psychosocial risk management (PRIMA‐EF). It also summarises and discusses key indings of research conducted through this policy‐orientated research programme.ObjectivesThis paper presents an overview of the development process of PRIMA‐EF. The background, methods and outcomes are described and discussed. The paper summarises the key findings of PRIMA‐EF and concludes by a discussion of the merit of PRIMA‐EF in the area of psychosocial risk management and its intended use. PRIMA‐EF has been built on a review, critical assessment, reconciliation and harmonisation of existing European approaches for the management of psychosocial risks and the promotion of mental health at the workplace. The framework has been built from a theor...
In this brief report, we provide normal reference ranges for PR duration [unadjusted and heart ra... more In this brief report, we provide normal reference ranges for PR duration [unadjusted and heart rate adjusted] and P-wave indices [duration, amplitude and terminal force in V1] in individuals free of cardiovascular disease and its risk factors. We used automatically processed digital ECG data from 1252 US participants [mean age 59 (± 10) years, 738 women, 588 whites, 207 African-Americans, 217 Hispanics, 240 Chinese] from the Multi-Ethnic Study of Atherosclerosis [MESA]. In multivariable adjusted linear regression models with PR and each P-wave variable as a separate outcome, significant age, sex and race differences in these markers were observed. Subsequently, we report reference ranges for abnormal [2 nd and 98 th percentiles], borderline abnormal [5 th and 95 th percentiles] and mean [SD] values of PR and P-wave indices stratified by age [middle age (45-64 years) and seniors (65-84 years)], sex [men and women] and race [whites, African Americans, Hispanics and Chinese].
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Papers by Aditya Jain