Entity

Time filter

Source Type


Sharad,Bharat Institute of Technology | Mishra S.,BCTKEC | Sharma A.K.,YMCA Faridabad | Chauhan D.S.,Uttrakhand Technical University
Communications in Computer and Information Science | Year: 2012

Tree topology based sensor node deployment in a region is a common approach. The network has a root called sink node and leaves known as end-devices. The end-devices sense the environmental phenomenon and forward it to the sink by single-hopping or multi-hopping. For it, device can either follow a fixed parent-child path depicted by Tree Routing protocols, or can utilize neighbor table to identify shortest path to the destination. The Enhanced Tree Routing (ETR) protocol is such a protocol that uses a structured node address assignment scheme. It uses neighbor table to find alternative one-hop neighbors link with minimum computation, other than parent-child links, for packet forwarding. The protocol is well suited for small and static tree topology and performs well. However, it lacks in focusing some issues like, how data is forwarded to sink i.e. raw-data converge cast or aggregated-data converge cast at each node, how to resolve multiple shortest path problem if network density increases and how to deal with changeable network topology. We, in this paper thus resolve some of the issues related to ETR protocol by proposing some new ideas and improvements. © 2012 Springer-Verlag. Source


Bishnoi L.C.,Uttrakhand Technical University | Jat D.S.,University of Namibia
Advances in Intelligent Systems and Computing | Year: 2016

This paper proposes a Novel Cross-layer Mechanism (NCLM) for Improving H.264/AVC Video Transmissions over IEEE 802.11n wireless network. According to the network traffic loads and the importance of the video data, the proposed mechanism dynamically selects the suitable access categories (AC) instead of predefined AC. This proposed novel cross-layer mechanism gives the information about the importance of video packets to the MAC layer. Information about the network traffic load is available from the queue length of all access categories. During this research, we analyzed the performance of NCLM in both light and heavy load over IEEE 802.11n wireless networks. In this research, the performance of video traffic measured by average: Throughput, PSNR, VQM, and SSIM. Simulation results of this research demonstrate that the performance of proposed mechanism was higher in comparison to the results derived from IEEE 802.11n EDCA, CLOT, DACMM, IPB-Frame AMM, and Static Mapping algorithm. © Springer Science+Business Media Singapore 2016. Source


Ahmad Y.,Uttrakhand Technical University
Der Pharma Chemica | Year: 2012

A reliable and sensitive isocratic stability indicating RP-HPLC method has been developed and validated for assay of Ezetimibe in tablets and for determination of content uniformity. An isocratic separation of Ezetimibe was achieved on Zorbax SB C18 (250mm × 4.6mm), 5 μm particle size columns with a flow rate of 1 ml/min and using a UV detector to monitor the eluate at 232nm. The mobile phase consisted of 0.02N ortho phosphoric acid: acetonitrile (20:80 v/v).The drug was subjected to oxidation, hydrolysis, photolysis and thermal degradation. All degradation products in an overall analytical run time of approximately 6 min with the parent compound Ezetimibe eluting at approximately 3.5 min. Response was a linear function of drug concentration in the range of 1-10 μg/ml (r 2 = 0.9993). Accuracy (recovery) was between 100.80. Degradation products resulting from the stress studies did not interfere with the detection of Ezetimibe and the assay is thus stability-indicating. Source


Goel A.,Govind Ballabh Pant University of Agriculture & Technology | Goel A.,Uttrakhand Technical University | Gaur V.S.,Govind Ballabh Pant University of Agriculture & Technology | Arora S.,Govind Ballabh Pant University of Agriculture & Technology | And 2 more authors.
OMICS A Journal of Integrative Biology | Year: 2012

The calcium (Ca2+) transporters, like Ca2+ channels, Ca2+ ATPases, and Ca2+ exchangers, are instrumental for signaling and transport. However, the mechanism by which they orchestrate the accumulation of Ca2+ in grain filling has not yet been investigated. Hence the present study was designed to identify the potential calcium transporter genes that may be responsible for the spatial accumulation of calcium during grain filling. In silico expression analyses were performed to identify Ca2+ transporters that predominantly express during the different developmental stages of Oryza sativa. A total of 13 unique calcium transporters (7 from massively parallel signature sequencing [MPSS] data analysis, and 9 from microarray analysis) were identified. Analysis of variance (ANOVA) revealed differential expression of the transporters across tissues, and principal component analysis (PCA) exhibited their seed-specific distinctive expression profile. Interestingly, Ca2+ exchanger genes are highly expressed in the initial stages, whereas some Ca2+ ATPase genes are highly expressed throughout seed development. Furthermore, analysis of the cis-elements located in the promoter region of the subset of 13 genes suggested that Dof proteins play essential roles in regulating the expression of Ca 2+ transporter genes during rice seed development. Based on these results, we developed a hypothetical model explaining the transport and tissue specific distribution of calcium in developing cereal seeds. The model may be extrapolated to understand the mechanism behind the exceptionally high level of calcium accumulation seen in grains like finger millet. © 2012 Mary Ann Liebert, Inc. Source


Mishra S.,Kumaon Engineering College | Chauhan D.S.,Uttrakhand Technical University
International Journal of Mobile Computing and Multimedia Communications | Year: 2011

In this paper, the authors discuss the emergence of new technologies related to the topic of the high-speed packet data access in wireless networks. The authors propose an algorithm for MIMO systems that optimizes the number of the transmit antennas according to the user's QoS. Scheduling performance under two types of traffic modes is also discussed: one is voice or web-browsing and the other is for data transfer and streaming data. © 2011, IGI Global. Source

Discover hidden collaborations