Tushar Kumar - Academia.edu (original) (raw)

Tushar Kumar

Uploads

Papers by Tushar Kumar

Research paper thumbnail of retrospective assessment of the early and medium outcomes of on-pump beating-heart versus off-pump CABG in patients with moderate left ventricular dysfunction (LVEF)

International journal of health sciences

Aim: To compare the early and medium outcomes of on-pump beating-heart (OPBH) coronary artery byp... more Aim: To compare the early and medium outcomes of on-pump beating-heart (OPBH) coronary artery bypass grafting (CABG) and off-pump CABG (OPCABG) in patients with left ventricular ejection fraction (LVEF) between 30% and 40%. Material & Methods: This study was conducted as a retrospective observation over a period of 1 year at the Department of Cardiothoracic and Vascular Surgery, Indira Gandhi Institute of medical Sciences, Patna, Bihar, India.130 patients were selected for this study. All patients were divided into 2 groups, according to the revascularization method: OPCABG group and OPBH group. Results: LVEF before discharge significantly improved from 34.39 ± 4.21 to 44.27 ± 7.29 in the OPBH group and from 34.27±4.61 to 42.66 ± 8.20in the OPCABG group (P<0.001). All survival patients have been echocardiographically examined after 6 months which showed a significant higher early postoperative LVEF in the OPBH group than in the OPCABG group (45.28 ± 6.10 versus 44.42 ± 7.08%, res...

Research paper thumbnail of Study of computerised tomography (CT scan) in diagnosis of paediatric intra-abdominal masses at VIMS, Pawapuri, Nalanda(Bihar)

MedPulse International Journal of Radiology, 2020

Research paper thumbnail of Comparative study of CT imaging and elisa test using es (excretory-secretory) antigen for case detection and prevalence of neurocysticercosis in paediatric patients at a tertiary health care center

MedPulse International Journal of Radiology, 2020

Research paper thumbnail of Study on factors affecting complementary feeding practices in infants and young children in a rural area of Bihar

Public Health Review: International Journal of Public Health Research, 2020

Research paper thumbnail of Characterizing Dominant Program Behavior Using the Execution-Time Variance of the Call Structure

2019 IEEE Real-Time and Embedded Technology and Applications Symposium (RTAS), 2019

Traditional profiling techniques typically identify performance hot-spots. Other specialized tech... more Traditional profiling techniques typically identify performance hot-spots. Other specialized techniques such as WCET analysis cater to safety critical real-time systems with hard constraints and thus make conservative assumptions. However, several domains motivate the need to systematically characterize and represent differential timing properties such as the variance in execution time of application artifacts such as the functions. Such domains include, vulnerability analysis of applications with regard to differential timing attacks, and the optimization of soft-real-time applications to reduce frame-rate fluctuations. In this paper, we motivate the need for execution variance as a performance measure and propose a variance-based analysis scheme. We introduce a new program representation called Variance Characterization Graph (VCG) that is used both as the intermediate representation for the variance-based analysis, and as the final representation that provides concise actionable information to programmers and optimization frameworks. We develop a methodology based on statistical pattern matching to summarize the dominant patterns of application behavior into a very compact VCG representation useful for tuning application behavior such as the soft-real-time properties.

Research paper thumbnail of retrospective assessment of the early and medium outcomes of on-pump beating-heart versus off-pump CABG in patients with moderate left ventricular dysfunction (LVEF)

International journal of health sciences

Aim: To compare the early and medium outcomes of on-pump beating-heart (OPBH) coronary artery byp... more Aim: To compare the early and medium outcomes of on-pump beating-heart (OPBH) coronary artery bypass grafting (CABG) and off-pump CABG (OPCABG) in patients with left ventricular ejection fraction (LVEF) between 30% and 40%. Material & Methods: This study was conducted as a retrospective observation over a period of 1 year at the Department of Cardiothoracic and Vascular Surgery, Indira Gandhi Institute of medical Sciences, Patna, Bihar, India.130 patients were selected for this study. All patients were divided into 2 groups, according to the revascularization method: OPCABG group and OPBH group. Results: LVEF before discharge significantly improved from 34.39 ± 4.21 to 44.27 ± 7.29 in the OPBH group and from 34.27±4.61 to 42.66 ± 8.20in the OPCABG group (P<0.001). All survival patients have been echocardiographically examined after 6 months which showed a significant higher early postoperative LVEF in the OPBH group than in the OPCABG group (45.28 ± 6.10 versus 44.42 ± 7.08%, res...

Research paper thumbnail of Study of computerised tomography (CT scan) in diagnosis of paediatric intra-abdominal masses at VIMS, Pawapuri, Nalanda(Bihar)

MedPulse International Journal of Radiology, 2020

Research paper thumbnail of Comparative study of CT imaging and elisa test using es (excretory-secretory) antigen for case detection and prevalence of neurocysticercosis in paediatric patients at a tertiary health care center

MedPulse International Journal of Radiology, 2020

Research paper thumbnail of Study on factors affecting complementary feeding practices in infants and young children in a rural area of Bihar

Public Health Review: International Journal of Public Health Research, 2020

Research paper thumbnail of Characterizing Dominant Program Behavior Using the Execution-Time Variance of the Call Structure

2019 IEEE Real-Time and Embedded Technology and Applications Symposium (RTAS), 2019

Traditional profiling techniques typically identify performance hot-spots. Other specialized tech... more Traditional profiling techniques typically identify performance hot-spots. Other specialized techniques such as WCET analysis cater to safety critical real-time systems with hard constraints and thus make conservative assumptions. However, several domains motivate the need to systematically characterize and represent differential timing properties such as the variance in execution time of application artifacts such as the functions. Such domains include, vulnerability analysis of applications with regard to differential timing attacks, and the optimization of soft-real-time applications to reduce frame-rate fluctuations. In this paper, we motivate the need for execution variance as a performance measure and propose a variance-based analysis scheme. We introduce a new program representation called Variance Characterization Graph (VCG) that is used both as the intermediate representation for the variance-based analysis, and as the final representation that provides concise actionable information to programmers and optimization frameworks. We develop a methodology based on statistical pattern matching to summarize the dominant patterns of application behavior into a very compact VCG representation useful for tuning application behavior such as the soft-real-time properties.

Log In