5,289 research outputs found
Dataset for "An Unsuitable Li-O2 Battery Electrolyte Made Suitable with the Use of Redox Mediators"
No full textDataset supports the article published in the Journal of Physical Chemistry C (2019): J. P. Vivek, T. Homewood, N. Garcia-Araez, "An Unsuitable Li-O2 Battery Electrolyte Made Suitable with the Use of Redox Mediators", DOI:10.1021/acs.jpcc.9b03403.</span
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
Aquatic flies (Diptera) in phytotelmata of Neotropical Zingiberales plants
No full textHayford, Barbara, Förster, Timo, Patel, Vivek N., Chaboo, Caroline S. (2021): Aquatic flies (Diptera) in phytotelmata of Neotropical Zingiberales plants. Journal of Natural History 54 (43-44): 2815-2838, DOI: 10.1080/00222933.2020.1871522, URL: http://dx.doi.org/10.1080/00222933.2020.187152
Differentially expressed miRNA in IC-547557 and Vivek Dhan genotypes of rice under low-N condition.
No full text<p>The values indicate the fold-change decrease/increase in the miRNA expression in IC-547557 over Vivek Dhan. Significance Analysis of Microarrays (SAM) and a criterion of fold change >2 and q value <0.001 was used to report the variation in expression.</p
Comparing learned representations of deep neural networks
No full textThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2019Cataloged from student-submitted PDF version of thesis.Includes bibliographical references (pages 63-64).In recent years, a variety of deep neural network architectures have obtained substantial accuracy improvements in tasks such as image classification, speech recognition, and machine translation, yet little is known about how different neural networks learn. To further understand this, we interpret the function of a deep neural network used for classification as converting inputs to a hidden representation in a high dimensional space and applying a linear classifier in this space. This work focuses on comparing these representations as well as the learned input features for different state-of-the-art convolutional neural network architectures. By focusing on the geometry of this representation, we find that different network architectures trained on the same task have hidden representations which are related by linear transformations. We find that retraining the same network architecture with a different initialization does not necessarily lead to more similar representation geometry for most architectures, but the ResNeXt architecture consistently learns similar features and hidden representation geometry. We also study connections to adversarial examples and observe that networks with more similar hidden representation geometries also exhibit higher rates of adversarial example transferability.by Vivek N. Miglani.M. Eng.M.Eng. Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Scienc
Debt maturity and firm performance : a panel study of Indian companies
Full text linkEconomic 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
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
Eagappan, K., Philip, M. G., Sangeetha, D. C., Vivek, N., & Ramalingam, S. (2012). Effect of green tea on the pharmacodynamics of warfarin. World Heart Journal, 4(2), 135-140
No full textEagappan, K., Philip, M. G., Sangeetha, D. C., Vivek, N., & Ramalingam, S. (2012). Effect of green tea on the pharmacodynamics of warfarin. World Heart Journal, 4(2), 135-14
A supratentorial cyst - Part 1 - Explanation and diagnosis: Enterogenous cyst
No full textDavid St. J. Astill, Nigel Jones, Joseph Vivek and Peter C. Blumberg
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