742 research outputs found
Most important outcomes research papers on device therapies for cardiomyopathies
No full textAakriti Gupta, Kumar Dharmarajan, Rachel Dreyer, Behnood Bikdeli, Ruijun Chen, Vivek T. Kulkarni, Ruizhi Shi, Abbas Shojaee, Isuru Ranasinghe for The Edito
Regional Density Of Cardiologists And Mortality For Acute Myocardial Infarction And Heart Failure
No full textREGIONAL DENSITY OF CARDIOLOGISTS AND MORTALITY FOR ACUTE MYOCARDIAL INFARCTION AND HEART FAILURE
Vivek T. Kulkarni, Joseph S. Ross, Yongfei Wang, Brahmajee K. Nallamothu, John A. Spertus, Sharon-Lise T. Normand, Frederick A. Masoudi, and Harlan M. Krumholz. Section of Cardiology, Department of Internal Medicine, Yale School of Medicine, New Haven, CT.
Cardiologists are distributed unevenly across regions of the United States. It is unknown whether patients in regions with fewer cardiologists have worse outcomes after hospitalization for acute myocardial infarction (AMI) or heart failure than patients in regions with more cardiologists. We hypothesized that patients hospitalized for AMI or heart failure in regions with lower density of cardiologists would have higher mortality than patients in regions with higher density.
Using Medicare administrative claims data from 2010, we examined the relationship between regional density of cardiologists and mortality after hospitalization for AMI and heart failure, using hospitalizations for pneumonia as a comparison. We defined density as the number of cardiologists divided by population aged ≥ 65 years within hospital referral regions, categorized into quintiles. We tested associations between density of cardiologists and 30-day and 1-year risk-standardized mortality for each condition. We used 2-level hierarchical logistic regression models that adjusted for characteristics of patients and hospital referral regions.
Our cohorts consisted of 171,126 admissions for AMI, 352,853 admissions for heart failure, and 343,053 admissions for pneumonia. Patients hospitalized for AMI (odds ratios [OR], 1.13; 95% confidence interval [CI], 1.06-1.21) and heart failure (OR, 1.19; 95% CI, 1.12-1.27) in the lowest quintile of density had modestly higher 30-day mortality risk compared with patients in the highest quintile, unlike patients hospitalized for pneumonia (OR, 1.02; 95% CI, 0.96-1.09). Patients hospitalized for AMI (OR, 1.06; 95% CI, 1.00-1.12) and heart failure (OR, 1.09; 95% CI, 1.04-1.13) in the lowest quintile had slightly higher 1- year mortality risk, unlike patients hospitalized for pneumonia (OR, 1.00; 95% CI, 0.95-1.05).
Patients hospitalized for AMI and heart failure in regions with lower density of cardiologists experienced modestly higher 30-day and 1-year mortality risk, unlike patients with pneumonia. These findings suggest that there is a relationship between regional density of cardiologists and mortality for AMI and heart failure, which is concentrated in the early period after these acute events
Qualitative Design of Supervisory Control and Data Acquisition System for a Regenerative Type Heat Exchanger
No full textThe growing demand for energy calls for better and efficient systems that can work in tandem to generate the same. Control of multiple systems can prove to be an uphill task if the same needs to be done in a customized manner. In order to ease and secure the control of multiple elements in a system, a Supervisory Control and Data Acquisition system is employed. These systems facilitate complete supervisory control from remote locations with effective Human Machine Interface supported by state of the art graphics to help the control room operator vary the parameters thereby controlling the output. This paper shall consider qualitative design of such a system for an application that may employ a Regenerative type Heat Exchanger. A literature review shall be put forward to understand the research in the associated areas. Thereafter the design parameters to be considered for two types of Regenerative Heat Exchangers namely Static and Dynamic will be put forward. Certain security aspects specific to this application shall be highlighted towards the end. A conclusion shall be drawn thereafter stating the importance of employing these systems for ease of operational control and improved system efficiency so as to contribute towards technological advancement in future. Gourav Vivek Kulkarni | Divya Rajendra Lagmavar "Qualitative Design of Supervisory Control and Data Acquisition System for a Regenerative Type Heat Exchanger" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-1 , December 2019, URL: https://www.ijtsrd.com/papers/ijtsrd29750.pd
Most important outcomes research papers on hypertension
No full textThe following are highlights from the new series, Circulation: Cardiovascular Quality and Outcomes Topic Review. This series will summarize the most important manuscripts, as selected by the Editor, which have published in the Circulation portfolio. The objective of this new series is to provide our readership with a timely, comprehensive selection of important papers that are relevant to the quality and outcomes, as well as general cardiology audience. The studies included in this article represent the most significant research related to hypertension.Ruijun Chen, Kumar Dharmarajan, Vivek T. Kulkarni, Natdanai Punnanithinont, Aakriti Gupta,Behnood Bikdeli, Purav S. Mody, and Isuru Ranasinghe for the Edito
Robust decentralized authentication for public keys and geographic location:
No full textAuthentication has traditionally been done either in a decentralized manner with human assistance or automatically through a centralized security infrastructure. In the security infrastructure approach, a central trusted authority takes on the responsibility of authenticating participants within its domain of control. While the security infrastructure approach works well in traditional organizations, it does not address the needs of open membership systems.
We propose automatic decentralized authentication mechanisms for peer-to-peer systems, email systems, and ad-hoc networks. Our byzantine fault tolerant public-key authentication protocol (BPKA) provides decentralized authentication to peer-to-peer systems with honest majority. Authentication is done over an insecure asynchronous network without using trusted third parties or human input. We also authenticate public keys in the email environment through our social-group key authentication protocol (SGKA). The protocol provides end-to-end authentication at the email client without using infrastructure or centralized authorities. Finally, location authentication in ad-hoc networks is proposed through our geographical secure path routing protocol (GSPR). The protocol authenticates geographic locations of anonymous nodes in order to provide location authentication and anonymity simultaneously.Ph.D.Includes bibliographical references (p. 121o-128)by Vivek Patha
Conservational Analysis of Influenza A Virus RNA-dependent RNA Polymerase
No full textCompeting Interests: The authors have declared that no competing interests exist. Copyright: 2015 Darapaneni V et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. *Correspondence to: Vivek Darapaneni, Department of virology and computational biochemistry, Sake
Debt maturity and firm performance : a panel study of Indian companies
No full textEconomic policy makers traditionally hold the view that, because of imperfections in capital markets, a shortage of long-term finance acts as a barrier to industrial performance and growth. Long term finance is thought to allow firms to invest in more productive technologies, even when they do not produce immediate payoffs, without fear of premature liquidation. As a result, special state-supported term-lending institutions have been established, especially in developing countries. But some believe that short-term finance may offer better incentives because it allows suppliers of finance to monitor and control firms more effectively, thus improving the firms'performance. The authors empirically investigate the determinants and consequences of the term structure of debt. Using a rich panel of data on privately owned companies in India, they also examine the influence of debt maturity structures on those firm's performance, especially on productivity. The results are not conclusive, but seem to support conventional beliefs about the importance of long term finance to firm performance. Heavy leveraging, however, has a strong negative impact on productivity. They base their econometric evidence on estimates of a maturity equation and of a production function augmented by financial variables. The data on which these results are based have been generated by a financial system in which there is little competition, in which state-owned financial institutions are not guided by the profit motive and have no control over interest rates, so one cannot say whether short term finance would have been more beneficial in a less regulated system. Moreover, by the end of the 1980s, the capital base of India's government-owned financial institutions had been severely eroded and they carried a heavy burden of nonperforming assets. This means that the benefits of long term finance must be weighed against the costs.Banks&Banking Reform,Financial Intermediation,Economic Theory&Research,Municipal Financial Management,Environmental Economics&Policies
VES2 - DFT and Functional Safety
No full textMachine Learning for DFT and ATPG
Yu HUANG (HiSILICON Inc. – China)Functional Safety Challenges and Solutions for the ARM® MaliTM-G78AE GPU
Prashant KULKARNI, Kartik KATHURIA (ARM – United Kingdom), Jussi PENNALA
(ARM – Sweden)3D IC DFT Implementation and Interconnect Test Based on IEEE 1838
Lukasz KOTYNIA, Frederic AZOULAY, Vivek CHICKERMANE, Sagar KUMAR, Rajesh
KHURANA (CADENCE Design Systems – POLAND, US
VES2 - DFT and Functional Safety
No full textMachine Learning for DFT and ATPG
Yu HUANG (HiSILICON Inc. – China)Functional Safety Challenges and Solutions for the ARM® MaliTM-G78AE GPU
Prashant KULKARNI, Kartik KATHURIA (ARM – United Kingdom), Jussi PENNALA
(ARM – Sweden)3D IC DFT Implementation and Interconnect Test Based on IEEE 1838
Lukasz KOTYNIA, Frederic AZOULAY, Vivek CHICKERMANE, Sagar KUMAR, Rajesh
KHURANA (CADENCE Design Systems – POLAND, US
Lattice approximation in the stochastic quantization of ([phi]4̳)2̳fields
No full textCaption title. "August 1988." On the title page, the bracketed word in the title appears as the Greek mathematical symbol representing [phi], the numeral four preceded by a double underscore appears as superscript, and the numeral two preceded by a double underscore appears as subscript.Includes bibliographical references.The research of the second author was supported in part by the U.S. Army Research Office, contract DAAL03-86-K-0171 The research of the second author was supported in part by the Air Force Office of Scientific Research under contract AFOSR-85-0227by Vivek S. Borkar, Sanjoy K. Mitter
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