Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99


Any time

2018 ( 1 )

2017 ( 1 )

2016 ( 2 )

2015 ( 17 )

Custom range...

Search Results: 1 - 10 of 705 matches for " Reinhardt;Chhabra "
All listed articles are free for downloading (OA Articles)
Page 1 /705
Display every page Item
Determining the viscous behavior of non-Newtonian fluids in a flume using a laminar sheet flow model and Ultrasonic Velocity Profiling (UVP) system
Haldenwang, Rainer;Kotzé, Reinhardt;Chhabra, Raj;
Journal of the Brazilian Society of Mechanical Sciences and Engineering , 2012, DOI: 10.1590/S1678-58782012000300008
Abstract: the flow of non-newtonian fluids in rectangular open channels has received renewed interest over the past number of years especially as large flumes are being used to transport tailings in countries like chile. the effect of yield stress on the flow behavior is complex and not yet fully understood. the ultrasonic velocity profiling (uvp) technique has been used to construct velocity profiles of non-newtonian fluids flowing in a 10 m by 300 mm wide tilting flume. the contour maps were integrated to show that the velocity profiles were indeed correct. the thin film flow models available in the literature have been tested in terms of flow depth and reynolds number. the measured profiles also show the influence of the side walls on the general flow features as the distance from the centre increases. the results reported herein span the laminar, transition and turbulent flow regions. as far as can be ascertained, it is the first time that this technique has been used to measure velocity profiles in opaque non-newtonian fluids for open channel flow. it is shown here that, under appropriate conditions, the velocity profile and flow depth can be used to obtain the viscous properties of the fluids tested. excellent correspondence between the rheological parameters inferred from the velocity profile measurements and that from the tube viscometry was obtained.
Connecting care competencies and culture during disasters
Chhabra Vivek
Journal of Emergencies, Trauma and Shock , 2009,
Abstract: Connecting care Competencies and Culture are core fundamentals in responding to disasters. Thick coordination between professionals, communities and agencies in different geographical areas is crucial to the happening of appropriate preparedness and thus efficient response and mitigation of a disaster. In the next few articles, we present diverse examples related to the preparedness and recovery process to adverse disasters across the globe
Breathing exercises and postural drainage for asthma, emphysema and bronchitis
Chhabra S
Lung India , 2005,
Application of Human Pluripotent Stem Cells in T Cell Based Cancer Immunotherapy
Arvind Chhabra
Insciences Journal , 2011,
Abstract: Human pluripotent stem cells represent a unique reservoir that could be utilized for generating cells of a given lineage. Cancer immunotherapy field could benefit from this, since one of the key limitations in developing an effective immune based cancer therapy is the lack of sufficient high avidity anti-tumor T cells in a great majority of cancer patients. The main reason for this is the fact that most human tumor antigens are “self-antigens” and most self reactive high avidity T cells are deleted during development to avoid autoimmunity. This manuscript reviews recent advances towards differentiating human pluripotent stem (hPS) cells into different immune effector cells, and potential strategies to utilize hPS cells in T cell based cancer immunotherapy approaches. We will also discuss the advantages and concerns associated with their clinical applications.
Agreement and differences between venous and arterial gas analysis
Chhabra Sunil
Annals of Thoracic Medicine , 2011,
Using arm span to derive height: Impact of three estimates of height on interpretation of spirometry
Chhabra S
Annals of Thoracic Medicine , 2008,
Abstract: Background: When standing height required to calculate forced vital capacity (FVC) cannot be measured, it can be derived from arm span using different methods. Objectives: To compare three different estimates of height derived from arm span and investigate their impact on interpretation of spirometric data. Methods: In a cross-sectional study, 517 subjects aged 7 to 76 years, with various respiratory diseases underwent spirometry. Three estimates of height were obtained from arm span: (a) by direct substitution (Ht AS ); (b) estimated height (Ht est ), obtained from the mean arm span:standing height ratio; and (c) predicted height (Ht pred ), obtained from arm span by linear regression analysis. Predicted values of forced vital capacity (FVC) obtained from these estimates were compared with those obtained from actual standing height (Ht act ), followed by Bland Altman analysis of agreement in the patterns of ventilatory impairment. Results: The arm span was 5%-6% greater than the height. The difference increased with increasing height. Ht AS and the FVC predicted from it were significantly greater than the other measures of height and the related predicted FVCs respectively. Compared to Ht act , Ht AS gave a misclassification rate of 23.7% in taller subjects (Ht act > 150 cm) and 14.2% in shorter subjects in the patterns of ventilatory impairment. Misclassification rates were 6%-8% with Ht est and Ht pred . Agreement analysis showed that FVCs predicted from Ht pred had the best agreement with the FVC predicted from Ht act . Conclusions: Among several methods of estimating height from the arm span, prediction by regression is most appropriate as it gives least errors in interpretation of spirometric data
Undeclared disaster: Radiation episode in New Delhi - Medical overview and hard lessons to learn!
Chhabra Vivek
Journal of Pharmacy and Bioallied Sciences , 2010,
On the number of proper $k$-colorings in an $n$-gon
Shantanu Chhabra
Computer Science , 2013,
Abstract: We define an $n$-gon to be any convex polygon with $n$ vertices. Let $V$ represent the set of vertices of the polygon. A proper $k$-coloring refers to a function, $f$ : $V$ $\rightarrow$ $\{1, 2, 3, ... k\}$, such that for any two vertices $u$ and $v$, if $f(u) = f(v)$, $u$ is not adjacent to $v$. The purpose of this paper is to develop a recursive algorithm to compute the number of proper $k$-colorings in an $n$-gon. The proposed algorithm can easily be solved to obtain the explicit expression. This matches the explicit expression obtained from the popular conventional solutions, which confirms the correctness of the proposed algorithm. Often, for huge values of $n$ and $k$, it becomes impractical to display the output numbers, which would consist of thousands of digits. We report the answer modulo a certain number. In such situations, the proposed algorithm is observed to run slightly faster than the conventional recursive algorithm.
Effect of Smoking on Body Mass Index: A Community-Based Study
Pragti Chhabra, Sunil K Chhabra
National Journal of Community Medicine , 2011,
Abstract: Smoking has a negative effect on Body Mass Index (BMI). This association may be confounded by demographic factors. Secondary analysis of data of 3446 non-smokers and 948 current smokers from a previously published community study on respiratory morbidity in Delhi was carried out to examine the association between smoking and BMI, and the confounding effects of gender and economic status. The BMI values were higher among non- smokers while smokers had a higher proportion of underweights. After adjusting for gender and economic status, the odds ratio for being underweight was 1.34 (95% CI 1.13-1.6) among smokers whereas non-smokers had an adjusted odds ratio for overweight/obesity of 2.16 (95% CI 1.24-3.78). The study shows that smoking is independently associated with reduced BMI after adjusting for gender and economic status in an Indian population.
A Novel Solution to Handle DDOS Attack in MANET  [PDF]
Meghna Chhabra, Brij Gupta, Ammar Almomani
Journal of Information Security (JIS) , 2013, DOI: 10.4236/jis.2013.43019

Distributed Denial of Service (DDoS) attacks in the networks needs to be prevented or handled if it occurs, as early as possible and before reaching the victim. Dealing with DDoS attacks is difficult due to their properties such as dynamic attack rates, various kinds of targets, big scale of botnet, etc. Distributed Denial of Service (DDoS) attack is hard to deal with because it is difficult to distinguish legitimate traffic from malicious traffic, especially when the traffic is coming at a different rate from distributed sources. DDoS attack becomes more difficult to handle if it occurs in wireless network because of the properties of ad hoc network such as dynamic topologies, low battery life, multicast routing, frequency of updates or network overhead, scalability, mobile agent based routing, and power aware routing, etc. Therefore, it is better to prevent the distributed denial of service attack rather than allowing it to occur and then taking the necessary steps to handle it. This paper discusses various the attack mechanisms and problems due to DDoS attack, also how MANET can be affected by these attacks. In addition to this, a novel solution is proposed to handle DDoS attacks in mobile ad hoc networks (MANETs).

Page 1 /705
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.