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Search Results: 1 - 10 of 592042 matches for " N. A. Khan "
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A Search for a Low Anisotropic Superconductor  [PDF]
A. A. Khurram, N. A. Khan
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2010, DOI: 10.4236/jemaa.2010.22010
Abstract: In this article, we have given a review of thallium based (TlmBa2Can-1CunO2n+2) and copper based (CuBa2Can-1 CunO2n+4) high temperature superconductors. This review article is based on the methods of preparation in the form of bulk and thin films and their physical properties. We have also studied the sources of anisotropy and methods of lowering it via changing the composition of charge reservoir layer and developing a better inter-plane coupling.
The invariants of 4-moves
N. A. Khan
Applied Mathematical Sciences , 2012,
Trigonometric Approximation of Signals (Functions) Belonging to the Lip(ξ(t),r),(r>1)-Class by (E,q) (q>0)-Means of the Conjugate Series of Its Fourier Series  [PDF]
Vishnu Narayan Mishra, Huzoor H. Khan, Idrees A. Khan, Kejal Khatri, Lakshmi N. Mishra
Advances in Pure Mathematics (APM) , 2013, DOI: 10.4236/apm.2013.33050

Various investigators such as Khan ([1-4]), Khan and Ram [5], Chandra [6,7], Leindler [8], Mishra et al. [9], Mishra [10], Mittal et al. [11], Mittal, Rhoades and Mishra [12], Mittal and Mishra [13], Rhoades et al. [14] have determined the degree of approximation of 2π-periodic signals (functions) belonging to various classes Lipα, Lip(α,r), Lip(ξ(t),r) and W(Lr,ζ(t)) of functions through trigonometric Fourier approximation (TFA) using different

Binary Gravitational Search based Algorithm for Optimum Siting and Sizing of DG and Shunt Capacitors in Radial Distribution Systems  [PDF]
N. A. Khan, S. Ghosh, S. P. Ghoshal
Energy and Power Engineering (EPE) , 2013, DOI: 10.4236/epe.2013.54B192

This paper presents a binary gravitational search algorithm (BGSA) is applied to solve the problem of optimal allotment of DG sets and Shunt capacitors in radial distribution systems. The problem is formulated as a nonlinear constrained single-objective optimization problem where the total line loss (TLL) and the total voltage deviations (TVD) are to be minimized separately by incorporating optimal placement of DG units and shunt capacitors with constraints which include limits on voltage, sizes of installed capacitors and DG. This BGSA is applied on the balanced IEEE 10 Bus distribution network and the results are compared with conventional binary particle swarm optimization.

An extension of a theorem of Sahab, Khan, and Sessa
A. R. Khan,N. Hussain
International Journal of Mathematics and Mathematical Sciences , 2001, DOI: 10.1155/s0161171201007190
Abstract: A fixed point theorem of Fisher and Sessa is generalized to locally convex spaces and the new result is applied to extend a recent theorem on invariant approximation of Sahab, Khan, andSessa.
Digitally Programmable Floating Impedance Multiplier using DVCC
N. Afzal,Iqbal A. Khan
International Journal of Electronics Communication and Computer Technology , 2013,
Abstract: A novel digitally programmable floating impedancemultiplier is presented. It is realized using differential voltagecurrent conveyor and a digital control module. Digitallyprogrammable floating impedance multipliers can provide digitalcontrol to floating impedance functions such as, resistor,capacitor, inductor without quantizing the signal. The techniqueused is simple, versatile as well as compatible formicrominiaturization in contemporary IC technologies. Thesimulation results on digitally programmable floating impedancemultiplier verify the theory.
TSEP: Threshold-sensitive Stable Election Protocol for WSNs
A. Kashaf,N. Javaid,Z. A. Khan,I. A. Khan
Computer Science , 2012,
Abstract: Wireless Sensor Networks (WSNs) are expected to find wide applicability and increasing deployment in near future. In this paper, we propose a new protocol, Threshold Sensitive Stable Election Protocol (TSEP), which is reactive protocol using three levels of heterogeneity. Reactive networks, as opposed to proactive networks, respond immediately to changes in relevant parameters of interest. We evaluate performance of our protocol for a simple temperature sensing application and compare results of protocol with some other protocols LEACH, DEEC, SEP, ESEP and TEEN. And from simulation results it is observed that protocol outperforms concerning life time of sensing nodes used.
Ubiquitous HealthCare in Wireless Body Area Networks - A Survey
N. Javaid,N. A. Khan,M. Shakir,M. A. Khan,S. H. Bouk,Z. A. Khan
Computer Science , 2013,
Abstract: Advances in wireless communication, system on chip and low power sensor nodes allowed realization of Wireless Body Area Network (WBAN). WBAN comprised of tiny sensors, which collect information of patient's vital signs and provide a real time feedback. In addition, WBAN also supports many applications including Ubiquitous HealthCare (UHC), entertainment, gaming, military, etc. UHC is required by elderly people to facilitate them with instant monitoring anywhere they move around. In this paper, different standards used in WBAN were also discussed briefly. Path loss in WBAN and its impact on communication was presented with the help of simulations, which were performed for different models of In-Body communication and different factors (such as, attenuation, frequency, distance etc) influencing path loss in On-Body communications.
A note on Kakutani type fixed point theorems
A. R. Khan,N. Hussain,L. A. Khan
International Journal of Mathematics and Mathematical Sciences , 2000, DOI: 10.1155/s0161171200004191
Abstract: We present Kakutani type fixed point theorems for certainsemigroups of self maps by relaxing conditions on the underlyingset, family of self maps, and the mappings themselves in a locallyconvex space setting.
Emergence of Plastidial Intergenic Spacers as Suitable DNA Barcodes for Arid Medicinal Plant Rhazya stricta  [PDF]
Samia A. Khan, Mohammed N. Baeshen, Hassan A. Ramadan, Nabih A. Baeshen
American Journal of Plant Sciences (AJPS) , 2017, DOI: 10.4236/ajps.2017.88121
Abstract: The desert plant Rhazya stricta has anticancer and antimicrobial properties, and is widely used in indigenous medicines of Saudi Arabia. However, the therapeutic benefits rely on an accurate identification of this species. The authenticity of R. stricta and other medicinal plants and herbs procured from local markets can be questionable due to a lack of clear phenotypic traits. DNA barcoding is an emerging technology for rapid and accurate species identification. In this study, six candidate chloroplastid barcodes were investigated for the authentication of R. stricta. We compared the DNA sequences from fifty locally collected and five market samples of R. stricta with database sequences of R. stricta and seven closely related species. We found that the coding regions matK, rbcL, rpoB, and rpoC1
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