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Search Results: 1 - 10 of 14057 matches for " Gulshan Singh "
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On the Location of Zeros of Polynomials  [PDF]
Gulshan Singh, Wali Mohammad Shah
American Journal of Computational Mathematics (AJCM) , 2011, DOI: 10.4236/ajcm.2011.11001
Abstract: In this paper, we prove some extensions and generalizations of the classical Eneström-Kakeya theorem.
On The Eneström-Kakeya Theorem  [PDF]
Gulshan Singh, Wali Mohammad Shah
Applied Mathematics (AM) , 2010, DOI: 10.4236/am.2010.16073
Abstract: In this paper, we prove some generalizations of results concerning the Eneström-Kakeya theorem. The results obtained considerably improve the bounds by relaxing the hypothesis in some cases.
Inequalities for the Polar Derivative of a Polynomial  [PDF]
Gulshan Singh, W. M. Shah, Yash Paul
Advances in Pure Mathematics (APM) , 2011, DOI: 10.4236/apm.2011.12006
Abstract: If is a polynomial of degree , having all its zeros in |z|≤K, K≥1 , then it was proved by Aziz and Rather [2] that for every real or complex number with |a| ≥K, . In this paper, we sharpen above result for the polynomials p(z) of degree n>3
Integral Mean Estimates for Polynomials Whose Zeros are within a Circle  [PDF]
Yash Paul, Wali Mohammad Shah, Gulshan Singh
Applied Mathematics (AM) , 2011, DOI: 10.4236/am.2011.21016
Abstract: Let be a polynomial of degree n having all its zeros in , then for each , , with , Aziz and Ahemad (1996) proved that In this paper, we extend the above inequality to the class of polynomials , having all its zeros in , and obtain a generalization as well as refinement of the above result.
Integral mean estimates for polynomials whose zeros are within a circle
Singh Gulshan,Shah WM
Journal of Inequalities and Applications , 2011,
Abstract: Let P(z) be a polynomial of degree n having all its zeros in |z| ≤ K ≤ 1, then for each δ > 0, p > 1, q > 1 with 1 p + 1 q = 1 , Aziz and Ahmad (Glas Mat Ser III 31:229-237, 1996) proved that n ∫ 0 2 π | P ( e i θ ) | δ d θ 1 δ ≤ ∫ 0 2 π | 1 + K e i θ | q δ d θ 1 q δ ∫ 0 2 π | P ′ ( e i θ ) | p δ d θ 1 p δ . In this paper, we extend the above inequality to the class of polynomials P ( z ) : = a n z n + ∑ j = μ n a n - j z n - j , 1 ≤ μ ≤ n, having all its zeros in |z| ≤ K ≤ 1, and obtain a generalization as well as refinement of the above result. Mathematics Subject Classification (2000) 30A10, 30C10, 30C15
International Journal of Engineering Science and Technology , 2010,
Abstract: The present paper gives the comparative study with respect to the profit between two models for sulphated juice pump standby systems—one (Model I) comprising two big units and the other (Model II) comprising one big and two small units. In model I, initially one unit is operative and the other is kept as cold standby whereas in Model II, initially one big unit is operative and both the small units are kept as cold standby. Comparative study with respect to profits is made between two models taking into consideration the installation cost and consumption cost for both types of units (big as well as small). System is analysed by making use of semi-Markov processes and regenerative point technique.
Metabolic pathway analysis and molecular docking analysis for identification of putative drug targets in Toxoplasma gondii: novel approach
Budhayash Gautam1,Gurmit Singh,Gulshan Wadhwa,Rohit Farmer
Bioinformation , 2012,
Abstract: Toxoplasma gondii is an obligate intracellular apicomplexan parasite that can infect a wide range of warm-blooded animals including humans. In humans and other intermediate hosts, toxoplasma develops into chronic infection that cannot be eliminated by host’s immune response or by currently used drugs. In most cases, chronic infections are largely asymptomatic unless the host becomes immune compromised. Thus, toxoplasma is a global health problem and the situation has become more precarious due to the advent of HIV infections and poor toleration of drugs used to treat toxoplasma infection, having severe side effects and also resistance have been developed to the current generation of drugs. The emergence of these drug resistant varieties of T. gondii has led to a search for novel drug targets. We have performed a comparative analysis of metabolic pathways of the host Homo sapiens and the pathogen T. gondii. The enzymes in the unique pathways of T. gondii, which do not show similarity to any protein from the host, represent attractive potential drug targets. We have listed out 11 such potential drug targets which are playing some important work in more than one pathway. Out of these, one important target is Glutamate dehydrogenase enzyme; it plays crucial part in oxidation reduction, metabolic process and amino acid metabolic process. As this is also present in the targets of tropical diseases of TDR (Tropical disease related Drug) target database and no PDB and MODBASE 3D structural model is available, homology models for Glutamate dehydrogenase enzyme were generated using MODELLER9v6. The model was further explored for the molecular dynamics simulation study with GROMACS, virtual screening and docking studies with suitable inhibitors against the NCI diversity subset molecules from ZINC database, by using AutoDock-Vina. The best ten docking solutions were selected (ZINC01690699, ZINC17465979, ZINC17465983, ZINC18141294_03, ZINC05462670, ZINC01572309, ZINC18055497_01, ZINC18141294, ZINC05462674 and ZINC13152284_01). Further the Complexes were analyzed through LIGPLOT. On the basis of Complex scoring and binding ability it is deciphered that these NCI diversity set II compounds, specifically ZINC01690699 (as it has minimum energy score and one of the highest number of interactions with the active site residue), could be promising inhibitors for T. gondii using Glutamate dehydrogenase as Drug target.
Response of Red Hot Pepper (Capsicum annum L.) to Water and Nitrogen under Drip and Check Basin Method of Irrigation
Gulshan Mahajan,K.G. Singh,Rakesh Sharda,Mukesh Siag
Asian Journal of Plant Sciences , 2007,
Abstract: The present investigation was undertaken for the period of two years (2004 and 2005) to evaluate the effect of various levels of water and N application through drip irrigation on red hot pepper yield, Water Use Efficiency (WUE) and Nitrogen Use Efficiency (NUE). In this experiment various combination of three irrigation treatments (Drip irrigation at 0.5 and 1.0xEpan, check basin method of irrigation at 1.0xEpan) and three nitrogen levels (50, 75 and 100% of recommended nitrogen) were compared in split plot design having three replications. The results revealed that when the same quantity of water and nitrogen (100% of recommended) was supplied through drip irrigation system, it increased the red hot pepper yield to 277.4 q ha-1 (an increase of 28.4%) under check basin method of irrigation. In check basin method of irrigation, the highest red hot pepper yield (216.1 q ha-1) obtained at 100% of recommended N, while in drip irrigation at 1.0xEpan, the yield was highest at 75% of recommended N. When water and nitrogen was supplied through drip at 0.5xEpan, the yield remained statistically same at all the levels of nitrogen, however proved superior over drip irrigation at 1.0xEpan at all the levels of N. When half the recommended amount of N was supplied through drip at 0.5xEpan.,WUE and NUE increased by 232.1 and 38.7% over check basin method of irrigation. At lower level of drip irrigation 0.5xEpan, Root length increased significantly with drip irrigation treatments as compared to check basin method of irrigation and found maximum (36.3 m) at lower level of drip irrigation 0.5xEpan. Thus drip irrigation at 0.5x Epan is beneficial for red hot pepper in term of yield, better morphological characters, viz, plant height, number of branches, root length, size and weight of fruits along with 58.6% saving of irrigation water over check basin method of irrigation.
The Use of Multi-Objective Genetic Algorithm Based Approach to Create Ensemble of ANN for Intrusion Detection  [PDF]
Gulshan Kumar, Krishan Kumar
International Journal of Intelligence Science (IJIS) , 2012, DOI: 10.4236/ijis.2012.224016
Abstract: Due to our increased dependence on Internet and growing number of intrusion incidents, building effective intrusion detection systems are essential for protecting Internet resources and yet it is a great challenge. In literature, many researchers utilized Artificial Neural Networks (ANN) in supervised learning based intrusion detection successfully. Here, ANN maps the network traffic into predefined classes i.e. normal or specific attack type based upon training from label dataset. However, for ANN-based IDS, detection rate (DR) and false positive rate (FPR) are still needed to be improved. In this study, we propose an ensemble approach, called MANNE, for ANN-based IDS that evolves ANNs by Multi Objective Genetic algorithm to solve the problem. It helps IDS to achieve high DR, less FPR and in turn high intrusion detection capability. The procedure of MANNE is as follows: firstly, a Pareto front consisting of a set of non-dominated ANN solutions is created using MOGA, which formulates the base classifiers. Subsequently, based upon this pool of non-dominated ANN solutions as base classifiers, another Pareto front consisting of a set of non-dominated ensembles is created which exhibits classification tradeoffs. Finally, prediction aggregation is done to get final ensemble prediction from predictions of base classifiers. Experimental results on the KDD CUP 1999 dataset show that our proposed ensemble approach, MANNE, outperforms ANN trained by Back Propagation and its ensembles using bagging & boosting methods in terms of defined performance metrics. We also compared our approach with other well-known methods such as decision tree and its ensembles using bagging & boosting methods.
Reclamation of Lithium Cobalt Oxide from Waste Lithium Ion Batteries to Be Used as Recycled Active Cathode Materials  [PDF]
Rakibul Qadir, Fahmida Gulshan
Materials Sciences and Applications (MSA) , 2018, DOI: 10.4236/msa.2018.91010
Abstract: Waste laptop batteries (Type-Lithium ion) have been collected and manually dismantled in the current work. Active electrode materials were scraped off from the copper current collector and polyethylene separators. The aluminum current collectors were found to be severely damaged and attached with the electrode material. It was treated with NaOH later to be recovered as Al2O3. The leaching of LiCoO2 was done by 3 M HCl aided by 5% H2O2 at 60°C from the scraped active electrode materials (LiCoO2 and graphite) leaving the graphite completely. Co was precipitated as hydroxide by the addition of NaOH and later converted to Co3O4. The remaining solution was treated with saturated Na2CO3 to acquire Li2CO3 as crystalline precipitate with high purity. The recovery of Co and Li was 99% and 30%, respectively. Co3O4 and Li2CO3were mixed in stoichiometric proportions and calcined around 950°C with air supply to achieve LiCoO2 successfully.
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