1,749,533 research outputs found
Open Source Software and OSPOs: The Connection between Open Science and Sustainable Development Goals (SDGs)
No full text<p>Sayeed Choudhury presented "Open Source Software and OSPOs: The Connection between Open Science and Sustainable Development Goals (SDGs)" during the 2023 Annual Forum for Open Research in Abu Dhabi, UAE. </p>
Stability and dynamics of regular and embedded solitons of a perturbed Fifth-order KdV equation
Full text linkFamilies of symmetric embedded solitary waves of a perturbed Fifth-order Korteweg–de Vries (FKdV) system were treated in Choudhury et al. (2022) using perturbative and reversible systems techniques. Here, the stability of those solutions, which was not considered in the earlier paper, is detailed. In addition, the results of Choudhury et al. (2022) are extended to the case of asymmetric solitary waves, as well as their stability. Finally, other novel multi-humped regular solitary waves of this system are derived using convergent infinite series solutions for the homoclinic orbits of the FKdV-traveling wave equatio
Network Agnostic Perfectly Secure MPC Against General Adversaries
Full text linkIn this work, we study perfectly-secure multi-party computation (MPC) against general (non-threshold) adversaries. Known protocols are secure against ^{(3)} and ^{(4)} adversary structures in a synchronous and an asynchronous network respectively. We address the existence of a single protocol which remains secure against ^{(3)} and ^{(4)} adversary structures in a synchronous and in an asynchronous network respectively, where the parties are unaware of the network type. We design the first such protocol against general adversaries. Our result generalizes the result of Appan, Chandramouli and Choudhury (PODC 2022), which presents such a protocol against threshold adversaries
Updating reionization scenarios after recent data
No full textThe recent release of data on (i) high-redshift source counts from the Near Infrared Camera and Multi-Object Spectrometer (NICMOS) Hubble Ultra Deep Field (HUDF) and (ii) electron scattering optical depth from the Wilkinson Microwave Anisotropy Probe (WMAP) requires a re-examination of reionization scenarios. Using an improved self-consistent reionization model, based on Choudhury & Ferrara, we determine the range of reionization histories which can match a wide variety of data sets simultaneously. The updated constraints from our analysis imply that hydrogen reionization starts at around z ~ 15, driven by the metal-free Population III (PopIII) stars (with normal Salpeter-like initial mass functions), and it is 90 per cent complete by z ~ 10. The photoionizing power of the PopIII stars fades for z <~ 10 because of concomitant action radiative and chemical feedbacks, which causes the reionization process to stretch considerably and to end only by z ~ 6. The combination of different data sets still favours a non-zero contribution from metal-free stars, with star-forming efficiencies larger than 2 per cent
Raw data for Choudhury et al., 2020
No full textThis excel spreadsheet contains the data for the Choudhury et al., 2020 research article.Choudhury et al., J. Physiol 598.11 pp2199-2222, 2020DOI: 10.1113/JP279668</div
Minimizing Weighted lp-Norm of Flow-Time in the Rejection Model
Full text linkWe consider the online scheduling problem to minimize the weighted ell_p-norm of flow-time of jobs. We study this problem under the rejection model introduced by Choudhury et al. (SODA 2015) - here the online algorithm is allowed to not serve an eps-fraction of the requests. We consider the restricted assignments setting where each job can go to a specified subset of machines. Our main result is an immediate dispatch non-migratory 1/eps^{O(1)}-competitive algorithm for this problem when one is allowed to reject at most eps-fraction of the total weight of jobs arriving. This is in contrast with the speed augmentation model under which no online algorithm for this problem can achieve a competitive ratio independent of p
Summary Data for Choudhury et al., 2020
No full textThis is the summary data and statistics for the research paper published in the Journals of Physiology: Choudhury et al., J Physiol 598.11 pp 2199–2222. 2020.DOI: 10.1113/JP279668</div
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