Rajesh Kumar

Bio: Rajesh Kumar is an academic researcher from Himachal Pradesh University. The author has contributed to research in topics: Medicine & Materials science. The author has an hindex of 149, co-authored 4439 publications receiving 140830 citations. Previous affiliations of Rajesh Kumar include Guru Nanak Dev University & Intuitive Surgical.

Rendering source regions into target regions of web pages

Abstract: A target web page may embed resources hosted by a source server. However, this embedding may result in compatibility and/or security issues; e.g., the dimensions of the embedded resource may skew the layout of the target web page. Instead, a source web page may be rendered separately from a target web page, and a source region of the source web page (e.g., a region defined by a set of coordinates) may be extracted from the source web page and may be presented in a target region of the target web page. The elements of the source region may be displayed and executed in isolation within the source web page, and may operate within a source domain (e.g., communicating with the source server and accessing cookies stored by the source server), yet may not interact with the elements of the target web page, thereby alleviating many compatibility and security problems.

All-sky search for gravitational-wave bursts in the first joint LIGO-GEO-Virgo run

Abstract: We present results from an all-sky search for unmodeled gravitational-wave bursts in the data collected by the LIGO, GEO 600 and Virgo detectors between November 2006 and October 2007. The search is performed by three different analysis algorithms over the frequency band 50-6000 Hz. Data are analyzed for times with at least two of the four LIGO-Virgo detectors in coincident operation, with a total live time of 266 days. No events produced by the search algorithms survive the selection cuts. We set a frequentist upper limit on the rate of gravitational-wave bursts impinging on our network of detectors. When combined with the previous LIGO search of the data collected between November 2005 and November 2006, the upper limit on the rate of detectable gravitational-wave bursts in the 64-2048 Hz band is 2.0 events per year at 90% confidence. We also present event rate versus strength exclusion plots for several types of plausible burst waveforms. The sensitivity of the combined search is expressed in terms of the root-sum-squared strain amplitude for a variety of simulated waveforms and lies in the range 6×10-22 Hz-1/2 to 2×10-20 Hz-1/2. This is the first untriggered burst search to use data from the LIGO and Virgo detectors together, and the most sensitive untriggered burst search performed so far.

All-sky search for continuous gravitational waves from isolated neutron stars using Advanced LIGO O2 data

Abstract: We present results of an all-sky search for continuous gravitational waves (CWs), which can be produced by fast spinning neutron stars with an asymmetry around their rotation axis, using data from the second observing run of the Advanced LIGO detectors. Three different semicoherent methods are used to search in a gravitational-wave frequency band from 20 to 1922 Hz and a first frequency derivative from -1×10-8 to 2×10-9 Hz/s. None of these searches has found clear evidence for a CW signal, so upper limits on the gravitational-wave strain amplitude are calculated, which for this broad range in parameter space are the most sensitive ever achieved.

CuO nanosheets as potential scaffolds for gas sensing applications

Abstract: Herein, we report a simple and facile synthesis and characterization of CuO nanosheets for the fabrication of efficient gas sensing applications. The CuO nanosheets were synthesized by a facile hydrothermal process and characterized in detail in terms of their morphological, structural, optical and compositional properties using various techniques such as field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), UV–vis and Fourier transform infrared (FTIR) spectroscopy. The detailed characterizations revealed that the synthesized CuO nanosheets are grown in high density, possessing well-crystallinity and monoclinic crystal structure. The synthesized CuO nanosheets were used as potential functional material to fabricate high sensitive sensors to detect various harmful gases, i.e. acetone, ethanol, and methanol. The fabricated gas sensors exhibited high gas responses of 7.725, 12.541 and 9.325 for acetone, ethanol, and methanol, respectively at an optimized temperature of 370 °C for 200 ppm concentrations. Finally, a sensing mechanism for the gas sensing behavior of CuO nanosheets was also proposed.

I and i

Abstract: There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality. Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

Fast parallel algorithms for short-range molecular dynamics

Abstract: Three parallel algorithms for classical molecular dynamics are presented. The first assigns each processor a fixed subset of atoms; the second assigns each a fixed subset of inter-atomic forces to compute; the third assigns each a fixed spatial region. The algorithms are suitable for molecular dynamics models which can be difficult to parallelize efficiently—those with short-range forces where the neighbors of each atom change rapidly. They can be implemented on any distributed-memory parallel machine which allows for message-passing of data between independently executing processors. The algorithms are tested on a standard Lennard-Jones benchmark problem for system sizes ranging from 500 to 100,000,000 atoms on several parallel supercomputers--the nCUBE 2, Intel iPSC/860 and Paragon, and Cray T3D. Comparing the results to the fastest reported vectorized Cray Y-MP and C90 algorithm shows that the current generation of parallel machines is competitive with conventional vector supercomputers even for small problems. For large problems, the spatial algorithm achieves parallel efficiencies of 90% and a 1840-node Intel Paragon performs up to 165 faster than a single Cray C9O processor. Trade-offs between the three algorithms and guidelines for adapting them to more complex molecular dynamics simulations are also discussed.

Global strategy for the diagnosis, management, and prevention of chronic obstructive pulmonary disease: GOLD executive summary.

Abstract: Chronic obstructive pulmonary disease (COPD) remains a major public health problem. It is the fourth leading cause of chronic morbidity and mortality in the United States, and is projected to rank fifth in 2020 in burden of disease worldwide, according to a study published by the World Bank/World Health Organization. Yet, COPD remains relatively unknown or ignored by the public as well as public health and government officials. In 1998, in an effort to bring more attention to COPD, its management, and its prevention, a committed group of scientists encouraged the U.S. National Heart, Lung, and Blood Institute and the World Health Organization to form the Global Initiative for Chronic Obstructive Lung Disease (GOLD). Among the important objectives of GOLD are to increase awareness of COPD and to help the millions of people who suffer from this disease and die prematurely of it or its complications. The first step in the GOLD program was to prepare a consensus report, Global Strategy for the Diagnosis, Management, and Prevention of COPD, published in 2001. The present, newly revised document follows the same format as the original consensus report, but has been updated to reflect the many publications on COPD that have appeared. GOLD national leaders, a network of international experts, have initiated investigations of the causes and prevalence of COPD in their countries, and developed innovative approaches for the dissemination and implementation of COPD management guidelines. We appreciate the enormous amount of work the GOLD national leaders have done on behalf of their patients with COPD. Despite the achievements in the 5 years since the GOLD report was originally published, considerable additional work is ahead of us if we are to control this major public health problem. The GOLD initiative will continue to bring COPD to the attention of governments, public health officials, health care workers, and the general public, but a concerted effort by all involved in health care will be necessary.

Using Multivariate Statistics

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