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Search Results: 1 - 10 of 2507 matches for " Himanshu Srivastava "
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Analysis of Genetic Diversity among Wild and Cultivated Chickpea Genotypes Employing ISSR and RAPD Markers  [PDF]
Pramod Kumar Singh, Himanshu Sharma, Nidhi Srivastava, Sameer S. Bhagyawant
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.55082
Abstract:

Chickpea (Cicer airetinum L.) is an important and most preferred food legume in many parts of the world especially in the Indian sub-continent. Molecular analysis of chickpea using DNA technology has been carried out to identify the diverse genetic base of the cultivars for selected preferential introductions as efficient edible elements. A few of these genetic stocks have been documented here to tap their genetic diversity. The status shows that the level of polymorphism in this species is low. Using PCR based markers, marker assisted selection of polymorphy is one of the established techniques. Here, this procedure has been employed to expedite gene/QTL pyramiding in the chickpea. The study presented here includes analysis of 12 germplasms of chickpea. Standard CTAB method has been performed, with certain modifications, to get better intensity and resolution of DNA bands. Extracted DNA, amplified with 41 RAPD and 21 ISSR primers are thereby tested to determine genetic diversity. The presentation discusses the results of chickpea germplasm diversity on the basis of these observations.

A Secure Decentralized Cloud Computing Environment over Peer to Peer
Tanupriya Choudhury,Vasudha Vashisht?,Himanshu Srivastava
International Journal of Computer Science and Mobile Computing , 2013,
Abstract: Cloud computing platform is a set of scalable large-scale data server clusters, it providecomputing and storage services to customers. A cloud computing provider or cloud computing serviceprovider owns and operates live cloud computing systems to deliver service to third parties. The barrier toentry is also significantly higher with capital expenditure required and billing and management creates someoverhead. Nonetheless, significant operational efficiency and agility advantages can be realized, even bysmall organizations, and server consolidation and virtualization rollouts are already well underway. Cloudcomputing systems provide large-scale infrastructures for high-performance computing that are “elastic”since they are able to adapt to user and application needs. Cloud computing platform is a set of scalablelarge-scale data server clusters. The cloud storage is a relatively basic and widely applied service which canprovide users with stable, massive data storage space. Research shows that the architecture of current cloudcomputing system is central structured one; all the data nodes must be indexed by a master server which maybecome bottle neck of the system. In this project, the proposed new cloud storage decentralized architecture(no centralization is there, that’s why it’s designed in Peer to peer) and designed a prototype system. Thesystem based on the new architecture has better scalability and fault tolerance and proposed system designeda cloud based environment where request and response is taking place between client and chunk serversthrough Gateway. Anyone can take multiple chunk servers as well as multiple clients in the proposed system,this environment (client) can make request for deploying a web-service and also in this proposed system, it’simplement the cross-technology platform using the cloud based environment and at last proposed analgorithm with the help of “Advance Encryption Standard” which is going to provide security in the form ofencryption and decryption in the cloud based environment.
Effect of Ambient Gas Pressure on the Thermal Exfoliation of Graphite Oxide: Tuning the Number of Graphene Sheets
Himanshu Raghubanshi,M. Sterlin Leo Hudson,O. N. Srivastava
Physics , 2013,
Abstract: We have investigated the effect of ambient gas pressure (Argon) used during thermal exfoliation of graphite oxide on the number of graphene sheets in the resulting graphene. The ambience gas Ar pressures used are 80, 25, 1 atmosphere and 10-3 as well as 10-5 torr. We have found curious result that the number of graphene sheets in exfoliated graphene stack is dependent on the applied pressure for exfoliation of graphite oxide (GO). By lowering the exfoliation pressure, the numbers of sheets get reduced. The numbers of sheets in exfoliated graphene stack have been determined by Lorentzian fit of their respective 002 peak of XRD profile. The numbers of sheets have also been confirmed with high resolution transmission electron microscopy (HRTEM). The numbers of sheets in exfoliated graphene stack samples have been found to be 28, 12, 8, 5 and 3 at 80 atm, 25 atm, 1 atm, 10-3 torr and 10-5 torr pressures respectively. The results of present investigation suggest a simple but effective method for synthesizing graphene with a specific number of sheets.
A Combined Solar Photovoltaic Distributed Energy Source Appliance  [PDF]
Himanshu Dehra
Natural Resources (NR) , 2011, DOI: 10.4236/nr.2011.22010
Abstract: The paper has analysed the state-of-art technology for a solar photovoltaic distributed energy source appliance. The success of implementation of photovoltaic (PV) power project is increased when PV module system is integrated with building design process and is used as multi purpose appliance for use with building elements. The improvement in overall system efficiency of building integrated PV modules embedded in building façade is achieved by minimizing and capturing energy losses. A novel solar energy utilisation technology for generation of electric and thermal power is presented by integration of ventilation and solar photovoltaic device with the heating, ventilating and air conditioning (HVAC) system. The testing appliance named as photovoltaic duct wall was a wooden frame assembly of double wall with air ventilation: two adjacent glass coated PV modules, air column, plywood board filled with polystyrene and dampers. The measurement data is collected from various sensors to read measurements of solar intensity, ambient air temperature, room air temperature, electric power, surface temperatures of PV modules and plywood board, air velocities and air temperatures in the air column. The enhancement in the air velocity of the air column is fulfilled with an exhaust fan fixed in an outdoor room. The simulation model is used to perform the two dimensional energy analyses with applied one dimensional solution of steady state heat conduction equations. The bases of simulation model are conjugating energy travel paths with network boundary conditions of convection, radiation exchange, heat storage ca- pacity, thermal storage capacity and heat transport.
A Theory of Acoustics in Solar Energy  [PDF]
Himanshu Dehra
Natural Resources (NR) , 2013, DOI: 10.4236/nr.2013.41A014
Abstract:

A novel theory of acoustics in solar energy supporting the principle of source and sink of solar energy is presented. The significance of the theory is in ascertaining the aftermaths of turning off solar energy. An amplifier constituting of a parallel plate photovoltaic device connected to a potentiometer is illustrated. It was constructed with a pair of glass coated photovoltaic modules and polystyrene filled plywood board as back panel with air ventilation through a parallel plate channel of amplifier. The sample results obtained from experiments and simulation model are presented to support hypothesis of acoustics for a parallel plate photovoltaic device connected to a potentiometer. A phenomenon of photovoltaic amplification is formulated.

Does Introduction of Stock Options Impact Stock Volatility? Empirical Evidence from Underlying Stocks in Indian Market  [PDF]
Himanshu Joshi
Theoretical Economics Letters (TEL) , 2018, DOI: 10.4236/tel.2018.810118
Abstract: Present study investigates the impact of single stock option trading on the volatility of the underlying stocks in Indian market using data of companies listed on National Stock Exchange (NSE) of India. The daily stock price data for a period of 1 year prior and post option introduction is extracted for 166 companies which offer options trading on the platform of NSE. Pre and post volatility of the underlying stocks is measured using standard deviation and GARCH (1, 1) model. Then the sample has been split into three groups based on the market capitalization of the stocks, i.e., large cap, mid cap, and small cap. Pre and post option listing volatility was tested for three groups separately. The highest average volatility is recorded for large cap stocks, followed by mid cap, and lowest for small cap stocks using GARCH (1, 1) model. This contrasts with the results of daily variance, as variance is highest for the small cap, followed by large cap and lowest for mid cap firms. Results show that for the large cap firms, volatility increases after the option listing, using both the measure of measures of volatility; and statistically insignificant decline has been recorded in the daily variance and average long-run volatility measure (VL) using GARCH (1, 1) model for mid cap, and small cap firms.
Option Trading, Information Asymmetry and Firm Innovativeness: Evidence from Stock Options Trading Firms from India  [PDF]
Himanshu Joshi
Theoretical Economics Letters (TEL) , 2018, DOI: 10.4236/tel.2018.811142
Abstract: Present study examines the effect of option listing and subsequent trading on the innovation in the context of publicly listed Indian firms. Innovation is defined in terms of input and output as R & D expense to sales, and number of patents filed by firm, respectively. Multiple regression analysis is conducted to identify drivers of innovations. Measures of innovation are used as dependent variables, while dummy for option trading is taken as independent variable along with other firm level control variables. The study also examines the determinants of the option listing on individual stocks using binary-logistic regression. Firm age, financial leverage, dividend payout, and profitability affect internal R & D allocations for the sample firms. As far as firm’s research output is concerned, firm leverage, institutional holding, option trading, and ESOP are the major determinants. Firm leverage adversely affects R & D input and R & D output alike. Dividend paying, large firms having higher institutional holdings are likely to attract stock option listing, while firms with high firm specific return variations are likely to have very low probability of option listing.
Studies on the de/re-hydrogenation characteristics of nanocrystalline MgH2 admixed with carbon nanofibres
Rohit R. Shahi,Himanshu Raghubanshi,M. A. Shaz,O. N. Srivastava
Applied Nanoscience , 2012, DOI: 10.1007/s13204-012-0083-y
Abstract: In the present investigation, we have synthesized different morphologies of carbon nanofibres (CNFs) to investigate their catalytic effect on the hydrogenation characteristics of 25 h ball-milled MgH2 (nano MgH2). The TEM analysis reveals that 25 h of ball-milling leads to the formation of nanocrystalline particles with size ranging between 10 and 20 nm. Different morphologies of CNFs were synthesized by catalytic thermal decomposition of acetylene (C2H2) gas over LaNi5 alloy. Helical carbon nanofibers (HCNFs) were formed at a temperature 650 °C. By increasing the synthesis temperature to 750 °C, planar carbon nanofibres were formed. In order to explore the effectiveness of CNFs towards lowering the decomposition temperature, TPD experiments (at heating rate 5 °C/min) were performed for nano MgH2 with and without CNFs. It was found that the decomposition temperature is reduced to ~334 and ~300 °C from 367 °C for the PCNF and HCNF catalysed nano MgH2. It is also found that HCNF admixed nano MgH2 absorbs ~5.25 wt% within 10 min as compared with pristine nano MgH2, which absorbs only ~4.2 % within the same time and same condition of temperature and pressure. Thus the HCNF possesses better catalytic activity than PCNF. These different levels of improvement in hydrogenation properties of HCNF catalysed nano MgH2 is attributed to the morphology of the CNFs.
Design of e-Land Record Information System with Google Map Using Mobile Commerce  [PDF]
Kanwalvir Singh, Himanshu Aggarwal
Journal of Software Engineering and Applications (JSEA) , 2013, DOI: 10.4236/jsea.2013.64027
Abstract:

e-Governance facilities are being used nowadays by citizens in various Government projects of the country. But the integration of mobile technologies with the e-Governance projects can lead to more human interaction and benefits for the society as a whole. This will result in having more impact on the lives of the common citizens and increase in awareness of such e-Governance projects. The paper introduces the features, technologies and design of the Android mobile device application, mobileLoanapp for the customer (client) of the bank for the loan approval process. The e-Land record information system has been designed and implemented with Google Map using Mobile Commerce by developing this mobile app. This m-app has been developed so as to provide improved and flexible e-Governance facility to the common citizens of the country. The proposed system if adapted will pave the way for the real-time applications to be embedded with the e-Governance facilities. This paper presents the overall system architecture along with its functional components and scope of the very appealing m-application (mobileLoanapp) for bank loan approval process in interconnection with the land server (part of Farad Kendra’s). The overall advantages of the proposed m-app have also been determined in comparison to the existing e-Governance system, giving a viable option to adopt and make use of integration of mobile technologies for providing e-Governance through this m-app.

Synthesis and Characterization of Hydroxyapatite Powder by Eggshell  [PDF]
Himanshu Khandelwal, Satya Prakash
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2016, DOI: 10.4236/jmmce.2016.42011
Abstract: Hydroxyapatite (HA) having chemical formula Ca10(PO4)6(OH)2, is the main chemical component of human bone tissue (70%). This is the reason why it has been widely engaged in the dental and non-load bearing implantations, to cope up with the bone response as a bioactive material. In this study HA powder was synthesized by wet chemical method, using phosphoric acid (H3PO4) and eggshells. The synthesized HA powder was characterized by X-ray diffraction analysis, Scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDX) and Fourier transform (FT-IR) spectroscopy. The Thermos gravimetric analysis (TGA-DTA) was also carried out to evaluate the stability of the synthesized HA powder at higher temperatures. The results of the study indicate that sintered (at 900°C) HA powder resembles the feature of pure and single apatite phase having favourable Ca/P ratio ranging from 1.7 to 2.4.
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