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Search Results: 1 - 10 of 9239 matches for " Rahul Sharma "
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Mechanical Property Estimation of Similar Weld using Ball Indentation Technique  [PDF]
Harshit Kumar Khandelwal, Kamal Sharma, Rahul Chhibber
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2012, DOI: 10.4236/jmmce.2012.1111116
Abstract: A weld joint is composed of three principal zones viz., base metal, Heat Affected Zone (HAZ), and weld zone. Thus, the variation in mechanical behavior exists not only among these zones, but also from point to point in each individual zone. Being destructive in nature, the conventional method of mechanical testing cannot successfully used to estimate the variation in the mechanical behavior at different zones of the weld joint. Moreover, the conventional method of mechanical testing cannot characterize the material using small amount of material. In this respect, Ball Indentation (BI) methodology was considered to be useful approach, since it can characterize the mechanical properties of a material using very small amount of material in non destructive manner. The present work is an attempt to characterize the variation in the mechanical properties among each zone (global variation), and from point to point in each zone (local variation) of the similar weld joint used in nuclear application using BI approach. For this purpose, the similar weld joint of two SS-304 LN pipe lines was investigated using BI approach.
Routine immunization - do people know about it? A study among caretakers of children attending pulse polio immunization in east Delhi
Sharma Rahul,Bhasin Sanjiv
Indian Journal of Community Medicine , 2008,
Abstract: Research question: Do caretakers of children under five years have sufficient knowledge regarding routine immunization (RI)? Objective: To assess the knowledge about RI among caretakers of young children. Settings: Pulse polio immunization centres in East Delhi. Study design: Cross-sectional study. Participants: Six hundred and eighty-two caretakers accompanying children under 5 years to pulse polio booths in November 2006. Study tool: Pre-tested semi-open-ended questionnaire. Statistical analysis: Proportions, Chi-square test. Results: The proportions of respondents who had awareness about different aspects of RI, such as weekday of RI (37.0%), age group for RI (49.1%), number of visits required in the first year of life (27.0%), were all low. When asked to name the four diseases covered under the RI program in Delhi, only 268 (39.3%) could name at least three. The education level of respondents was strongly associated with their knowledge about RI. Conclusion: The need of the hour is to make RI a ′felt need′ of the community. Making caretakers more aware about RI is a vital step in achieving this goal.
An Agent Based Energy Efficient Local Monitoring
Rahul Dubey,Sanjeev Sharma
International Journal of Soft Computing & Engineering , 2011,
Abstract: Local monitoring is the one of the powerful technique for improving the security in multihope Wireless Sensor Network (WSN).Although it is a good technique for security purpose in WSN but it has a major drawback that it is costly in terms of energy consumption which make overhead for the energy constrained system such as WSN. In WSN environment, the scarce power resources are typically addressed through sleep- wake scheduling of nodes but sleep-wake technique is vulnerable even to simple attacks .In this paper a new technique is proposed that is not only energy efficient but also a secure technique which combine the sleep wake up scheduling with local monitoring which we call the OD –AEELMO (On Demand Agent Based Energy Efficient Local Monitoring ).it enables sleep- wake management in secure manner even in face of adversarial nodes that choose not to awaken nodes responsible for monitoring their traffic.
H1NI Virus in Immunocompromised Patients
Rahul Sharma, Ashutosh Gupta
JK Science : Journal of Medical Education & Research , 2009,
Presence of solar filament plasma detected in interplanetary coronal mass ejections by in situ spacecraft
Sharma Rahul,Srivastava Nandita
Journal of Space Weather and Space Climate , 2012, DOI: 10.1051/swsc/2012010
Abstract: Aims: To identify the solar filament plasma at 1 AU by using in situ spacecraft data. Methods: We used magnetic, plasma and compositional parameters to identify the presence of filamentary material within and outside magnetic clouds. Results: We report two cases of observed filament plasma embedded in interplanetary coronal mass ejections (ICMEs) related to a flare-associated eruptive filament and a quiescent filament eruption at different phases of solar cycle by using magnetic, plasma, and compositional parameters. Conclusions: Analysis of in situ multi-spacecraft observations of ICME structures and substructures confirms the presence of solar filament material.
Novel Approach for Frequent Pattern Algorithm for Maximizing Frequent Patterns in Effective Time
Rahul Sharma,Dr. Manish Manoria
International Journal of Computers & Technology , 2012,
Abstract: The essential aspect of mining association rules is to mine the frequent patterns. Due to native difficulty it is impossible to mine complete frequent patterns from a dense database. FP-growth algorithm has been implemented using an Array-based structure, known as the FP-tree,which is for storing compressed frequency information. Numerous experimental results have demonstrated that the algorithm performs extremely well. But in FP-growth algorithm, two traversals of FP-tree are needed for constructing the new conditional FP-tree. In this paper we present a novel Array Based Without Scanning Frequent Pattern (ABWSFP) tree technique that greatly reduces the need to traverse FP-trees, thus obtaining significantly improved performance for FP-tree based algorithms. The technique works especially well for large datasets. We then present a new algorithm which use the QFP-tree data structure in combination with the FP Tree- Experimental results show that the new algorithm outperform other algorithm in not only the speed of algorithms, but also their CPU consumption and their scalability.
Spectrophotometric Determination of Guaifenesin and Pseudoephedrine Hydrochloride in Tablet Dosage Form
Sahu Rahul,Sharma Hemendra Kumar
International Journal of Research in Pharmacy and Science , 2011,
Abstract: Two simple, accurate, precise, reproducible, requiring no prior separation and economical procedures for simultaneous estimation of guaifenesin and pseudoephedrine hydrochloride in tablet dosage form have been developed. First method is simultaneous equation method; in this method 272 nm and 257 nm were selected to measure the absorbance of guaifenesin and pseudoephedrine hydrochloride respectively. The second method is Q‐value analysis based on measurement of absorptivity at 265.50 nm (as an iso‐absorptive point) and 272 nm. guaifenesin and pseudoephedrine hydrochloride at their respective maximum wavelength 272 nm and 257 nm and at isoabsorptive point 265.50 nm shows linearity in a concentration range of 30-150 μg/mL and 300-1500 μg/mL respectively. Recovery studies range from >98.50% for guaifenesin and >98.90% for pseudoephedrine hydrochloride in case of simultaneous equation method and >98.24% for guaifenesin and >98.09% for pseudoephedrine hydrochloride in case of Q‐analysis method confirming the accuracy of the proposed method. The proposed methods are recommended for routine analysis since it is rapid, simple, accurate and also sensitive and specific (no heating and no organic solvent extraction is required).
Radiative Neutralino Production in Low Energy Supersymmetric Models
Basu, Rahul;Pandita, P. N.;Sharma, Chandradew
High Energy Physics - Phenomenology , 2007, DOI: 10.1103/PhysRevD.77.115009
Abstract: We study the production of the lightest neutralinos in the radiative process $e^+e^- \to \tilde\chi^0_1 \tilde\chi^0_1\gamma$ in low energy supersymmetric models for the International Linear Collider energies. This includes the minimal supersymmetric standard model as well as its extension with an additional chiral Higgs singlet superfield, the nonminimal supersymmetric standard model. We compare and contrast the dependence of the signal cross section on the parameters of the neutralino sector of the minimal and nonminimal supersymmetric standard model. We also consider the background to this process coming from the Standard Model process $e^+e^- \to \nu \bar\nu \gamma$, as well as from the radiative production of the scalar partners of the neutrinos (sneutrinos) $e^+e^- \to \tilde\nu \tilde\nu^\ast \gamma$, which can be a background to the radiative neutralino production when the sneutrinos decay invisibly. In low energy supersymmetric models radiative production of the lightest neutralinos may be the only channel to study supersymmetric partners of the Standard Model particles at the first stage of a linear collider, since heavier neutralinos, charginos and sleptons may be too heavy to be pair-produced at a $e^+ e^-$ machine with $\sqrt{s} =500\GeV$.
Comparison of performance analysis of 802.11a, 802.11b and 802.11g standard
International Journal on Computer Science and Engineering , 2010,
Abstract: Wireless local area networks (WLANs) based on the IEEE 802.11 standards has been successfully deployed in a variety of home, office and corporate environments and available in various flavors like 802.11a/b/g. In this paper indepth analysis of the throughput performance and bandwidth efficiency of 802.11a standard has been investigated and compared for CSMA/CA and RTS/CTS schemes. In thispaper, an analytical model based on theoretical analysis has been used to predict the throughput performance in IEEE 802.11a, 802.11b and 802.11g WLANs and further extended to predict the throughput performance taking into account the effect of channel conditions (FER). Results have been obtained using Matlab software which shows a superior throughput performance for 802.11a as compared to 802.11b/g using the same OFDM technology is employed for both the standards. Variation of throughput as a function of MSDU for the CSMA/CA and RTS/CTS for standard 802.11a, 802.11b and 802.11g reveals that throughput for CSMA/CA is greater than RTS/CTS scheme for same datarate. It has also been observed that considering physical condition i.e. FER in this case, throughput for 802.11a/b/g standards decreases with increasing FER when data rate is kept constant.
Risk behaviors related to inter-personal violence among school and college-going adolescents in south Delhi
Sharma Rahul,Grover Vijay,Chaturvedi Sanjay
Indian Journal of Community Medicine , 2008,
Abstract: Background: Injuries are a major cause of death and disability among the adolescents in the world. Objective: To study risk behavior related to interpersonal violence amongst school- and college-going adolescents in South Delhi and its epidemiological correlates. Study Design: Cross-sectional study. Setting: Three schools and two colleges in South Delhi. Participants: Five hundred and fifty adolescents aged 14-19 years. Statistical Analysis: Proportions, Chi-square test, multivariate logistic regression. Results: Among the study participants, 65 (11.8%) reported having carried a weapon in past 30 days. Seventy-four (13.5%) respondents had threatened or injured someone with a weapon in past 12 months. Almost one in every two boys (49.1%) reported being involved in a physical fight in past 12 months. Involvement in interpersonal violence was found to be significantly more amongst males than females. Adolescents who were working part time were more likely to be ′at risk′ (67.5%) than those not working (48.5%). In logistic regression analysis, the significant correlates of interpersonal violence were male gender, lower age, number of close friends, having seen role models smoke/drink, and residing in resettlement colonies, slums or villages. The findings regarding violence-related behaviors among adolescents are remarkably similar to those in other countries.
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