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Search Results: 1 - 10 of 393955 matches for " Dr. R.P.Singh "
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Productivity Analysis of the Telecommunication Sector in India
Vineeta Saxena (Nigam),Dr. Tripta Thakur,Dr. R.P.Singh
International Journal of Engineering and Technology , 2009,
Abstract: This paper applies the data envelopment analysis (DEA) approach to measure the Productivity performance of India’s telecommunications sector. This study applies a data envelopment analysis (DEA) approach to measure the magnitude of performance differences between leading telecom operators in terms of their marketability and Profitability. It compares the financial valuations and relative productivity efficiencies of the leading global telecoms. Empirical results indicate that none of the telecoms with high valuations are highly efficient in terms of DEA, and that wireless operators are more efficient than full-service telecoms in terms of profitability and marketability. The results are expected to be utilized as benchmarking strategies for wireless and full-service telecommunications to be equipped with competitive advantages.
普通小麦中耐大麦黄矮病毒的Bdv1基因
R.P.Singh,周恒
麦类作物学报 , 1993, DOI: 10.7606/j.issn.1009-1041.1993.06.114
Abstract: 大麦黄矮病(BYD)是世界小谷粒作物为害最严重、发病最普遍的病毒病。已知北美普通小麦品种Anza及CIMMYT的几个小麦材料耐BYD。为了了解BYD耐性遗传基础.对Anza和9个其它耐性小麦材料进行了研究。将耐病材料进行杂交.并与敏感亲本Bobwhite或Bagula杂交。1990年在墨西哥Toluca附近的田间.用BYDV血清型MAV—Mex对亲本、F_1及F_2代进行了检测。1991年.在田间用相同的血清型对亲本、F_1及从每个杂交组合获得的72个F_2单株所产生的P_3品系作了分级鉴定。耐病亲本间杂交后无分离.耐病和敏感亲本杂交所得F_3品系的分布符合单基因分离比例。作者断定Anza及其它9个小麦试材的耐病性是由一普遍存在的、部分有效、部分显性Bdv1基因所致。Bdv1可能来源于巴西的栽培品种Frontana.由于它广泛地存在于许多ClMMYT小麦中,所以可能是一持久抗源。
Management of mushroom pathogens through botanicals
MANDVI SINGH* and R.P. SINGH
Indian Phytopathology , 2012,
Abstract: Anti-fungal activities of leaf extracts of 26 angiospermic plants and two most popular chemical fungicides sporgon and bavistin were tested against the pathogenic fungi Mycogone perniciosa, Verticillium fungicola var. fungicola and Fusarium moniliforme causing wet bubble, dry bubble and wilt diseases, respectively in white button mushroom. Leaf extracts from the Aegle marmelos, Berberis aristata, Cannabis sativa, Cleome viscosa, Erigeron karvinskianus and Leonotis nepetaefolia were found effective against tested pathogenic fungi. Among them Erigeron karvinskianus was highly effective against all the three pathogens.
Similariton Compression in a Comb like Dispersion Decreasing Fibre
Tenguri. Doddabasavaraja,Dr. R.P. Sharma
Indian Streams Research Journal , 2012,
Abstract: Optical pulse compression using similariton propagation in an optical fibre with decreasing dispersion has been demonstrated for the first time. This compression scheme is a practical application of the sech-similariton solution to the generalized nonlinear Schrodinger equation (NLSE) with distributed coefficients recently found using the self-similarity technique. The sech-similariton solution exhibits a characteristic positive linear frequency chirp, which increases in slope as the pulse compresses. The solution does not develop any side pedestals or deformation in pulse shape as it propagates, making it a promising candidate for a new compression technique. Unlike the adiabatic compression technique, rapid compression can be achieved in a fibre with a specifically designed decreasing group velocity dispersion profile since the sech-similariton is an exact solution to the NLSE.
Performance Evaluation & Application of Smart Antenna in Sensor Networks
Nidhi jain,Dr. R.P. Yadav
International Journal of Computer Technology and Applications , 2011,
Abstract: This research work provides a method for forming a communications link of Wireless Sensor Networks (WSN) by enabling each WSN to act as a smart antenna. Each WSN is simulated as a set of randomly placed sensor nodes within a planar area. The proposed method involves a searching WSN, a receiving WSN and a link budget for establishing the link. The searching WSN has the task of transmitting a search beam in order to find adjacent WSNs. We also demonstrate that for a given required gain level we can spatially thin the array without significant loss of gain or the effects of grating lobes. The receiving WSN uses a spread spectrum based space division multiple access (SDMA) receiver. This receiver is simulated to determine the direction of arrival from the searching WSN and to extract the location information from the searching WSN’s signal with additive white Gaussian noise.
AN ONTOLOGY-BASED INTELLIGENT INFORMATION RETRIEVAL METHOD FOR DOCUMENT RETRIEVAL
POONAM YADAV,R.P. SINGH
International Journal of Engineering Science and Technology , 2012,
Abstract: The document retrieval is one of the fast growing and complex research area in the field of information retrieval. In this paper, we proposed an ontology-based method for document retrieval. The ontology defined in our proposed approach gives extra freedom to choose between the documents and thus give an accurate retrieval ofthe documents. The results and analysis of our proposed method showed expected results and a comparative analysis was subjected for analyzing the proposed method with an existing algorithm. The F-measure comparison showed the performance improvement of the proposed method with respect to the existing method.
Moisture Adsorption and Thermodynamic Properties of California Grown Almonds (Varieties: Nonpareil and Monterey)
Li Zuo Taitano,R.P. Singh
International Journal of Food Studies , 2012,
Abstract: Moisture adsorption characteristics of California grown almonds (Nonpareil: pasteurized and unpasteurized almonds; Monterey: pasteurized, unpasteurized and blanched almonds) were obtained using the gravimetric method over a range of water activities from 0.11 to 0.98 at 7-50oC. The weights of almonds were measured until samples reached a constant weight. The relationship between equilibrium moisture content and water activity was established using the Guggenheim-Anderson-de Boer model. The diffusion coefficient of water in almond kernels was calculated based on Ficks second law. The monolayer moisture value of almonds ranged from 0.020 to 0.035 kg H2O kg-1 solids. The diffusion coefficient increased with temperature at a constant water activity, and decreased with water activity at a constant temperature. The thermodynamic properties (net isosteric heat, differential enthalpy and entropy) were also determined. The net isosteric heat of adsorption decreased with the increasing moisture content, and the plot of differential enthalpy versus entropy satisfied the enthalpy-entropy compensation theory. The adsorption process of almond samples was enthalpy driven over the range of studied moisture contents.
Slow rusting in lentil infected with Uromyces fabae
R.P. GUPTA and SUSHIL KUMAR SINGH*
Indian Phytopathology , 2011,
Abstract:
Variation of Quantum Well Infrared Photodetectors Parameter With an Applied Electric Field
R.P. Singh,D.P. Singh
Journal of Nano- and Electronic Physics , 2011,
Abstract: A model is presented for the performance of quantum well infrared photodetectors (QWIPs) utilizing intersubband electron transitions and tunneling injection electrons. The dark current and the responsivity are derived as functions of the QWIP parameters, including the number of the QWs and electric field dependent capture probability in an analytical form.
Differential susceptibility of rice cultivars to rice tungro spherical and bacilliform viruses
F.R. NIAZI, JASVIR SINGH and R.P. PANT
Indian Phytopathology , 2012,
Abstract:
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