Uttarakhand, India
Uttarakhand, India

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Singh V.K.,Gb Pant University
Journal of Materials and Environmental Science | Year: 2013

In the present work walnut particles reinforced (10%wt-40%wt) epoxy matrix composite was fabricated in open mould. Physical property-density and Mechanical property-tensile properties have been evaluated. Role of particle wt% reinforcement observed for density and tensile properties-ultimate tensile strength, modulus of elasticity and % elongation. Increase of wt % of walnut particle from 10%wt to 20%wt was very much effective for loss in ultimate tensile strength and gain in % elongation, in comparison to increase in 20-40% wt. Effect on modulus of elasticity was almost consistent.

Pandey K.,Ajay Kumar Garg Engineering College | Agrawal H.M.,Gb Pant University | Kumar A.,Bhabha Atomic Research Center
Annals of Nuclear Energy | Year: 2011

The (n, α) reaction cross-sections from threshold to ∼20 MeV on some important nuclides 42Ca, 50,53Cr, 56,57Fe, 58,62Ni, and 63,65Cu involved in the reactor shielding design have been calculated using the Hauser-Feshbach statistical model with preequilibrium effects by involving PCROSS option in Empire 2.19. The transmission coefficients for neutrons in the entrance channel are calculated using the optical model potential of Koning. In the exit channel optical model potential of Avrigeanu has been used. The experimental values have been chosen carefully for all the isotopes, from EXFOR data base. The calculations are compared with existing experimental data as well as with evaluated data files (ENDF/B-VI.0 and JENDL-3.3). A good agreement between the calculated and experimental data validates the nuclear model approaches with increased predictive power to supplement and extend the nuclear database that is required for several applications.

Dumka A.,University of Petroleum and Energy Studies | Mandoria H.L.,Gb Pant University | Fore V.,Gurukul Kangri University | Dumka K.,Uttarakhand Technical University
2015 International Conference on Computing for Sustainable Global Development, INDIACom 2015 | Year: 2015

This paper presents an implementation of new QoS algorithm (SPPA, Sync-Pre-empted Probability Algorithm) for IntServ-aware MPLS network under windows platform. The algorithm, which comprises of optimal LSPs (Label Switching Paths) selection and the network resource allocation, is injected into the ingress router to verify the feasibility. This algorithm avoids the congestion in network traffic and utilizes the resources of the network. © 2015 IEEE.

Singh R.,Gb Pant University | Sharma T.P.,National Institute of Technology Hamirpur
Journal of Location Based Services | Year: 2015

WLANs are prone to flooding denial-of-service (DoS) attacks. Present research work proposes a novel method to enhance WLAN security by restricting flooding DoS effect on the access point (AP). Each node in the proposed method listens transmission of other neighbouring nodes and sends at regular interval a linked list to AP, containing the identifiers (IDs) of all nodes from which it hears. AP stores the linked list information and runs location-based coordinate calculation (LBCC) algorithm. LBCC finds the expected coordinates of each node and probable location area with the expected coordinates as centre. Flooding DoS attack by the attacker is restricted at the AP using node’s probable location area. The method is validated by simulation experimentations with varying topologies. Further, geometrical analysis of the method is also provided. © 2016 Taylor & Francis.

Singh R.,Gb Pant University | Sharma T.P.,National Institute of Technology Hamirpur
Proceedings - 4th IEEE International Conference on Computer and Communication Technology, ICCCT 2013 | Year: 2013

Authentication per frame is an implicit necessity for security in Wireless LANs (Local Area Networks). 802.11i security framework proposes encryption and MIC based authentication of data frames. In this, the key is not refreshed every time a frame is sent. For refreshing the key entities explicitly perform a 4-way handshake to evaluate PTK. 4-way handshake also ensures that involved entities have the same transient key (refreshed key). 4-way handshake involves computation cost. It also adds to the communication cost in the wireless environment, as data frame are utilized for this purpose. 4-way handshake in the 802.11i framework happens to be prone to DoS attacks (especially due to first message of the 4-way handshake). We propose a novel per frame key refreshing method that do away with the 4-way handshake. It does not require extra bits or extra frame for this purpose and also no change in the existing frame format is required. It uses existing key, frame sequence number along with the authentication stream generator for key refreshing. © 2013 IEEE.

Singh R.,Gb Pant University | Sharma T.P.,National Institute of Technology Hamirpur
IFIP International Conference on Wireless and Optical Communications Networks, WOCN | Year: 2013

Authentication and integrity per frame is an implicit necessity for security in Wireless LANs (Local Area Networks). The existing security frameworks (WPA, 802.11i) provide message integrity code (MIC) for maintaining the integrity and authentication for each data frame. MIC is kept in separate field in the frame and hence adds to the communication overhead. We propose a novel sequence number based scheme to reduce the MIC overhead in the WLANs. The scheme provides per frame message integrity and authentication. It requires only trivial operations like hash evaluation, XOR and addition. It does not require extra bits or extra frame for this purpose and also no change in the existing frame format is required. © 2013 IEEE.

Longvah T.,National Institute of Nutrition | Toteja G.S.,Indian Council of Medical Research | Bulliyya G.,Regional Medical Research Center | Raghuvanshi R.S.,Gb Pant University | And 3 more authors.
Food Chemistry | Year: 2012

Universal salt iodisation programme is recognised as an economical, convenient and effective means of preventing iodine deficiency disorders (IDD). However, information on the retention of iodine during cooking is scant. Therefore this study was undertaken to investigate the retention of iodine from iodised salt when added to the most commonly used Indian recipes. The Mean ± SD retention of iodine in 140 of the most common Indian recipes was 60 ± 21%. The frequency distribution showed low retention (<20%) of iodine in 5.7% of the recipes, moderate retention (20-40%) in 15.7% while very high retention (>80%) was observed in 20%. Significant correlation (r = -0.194, P < 0.05) was observed between iodine retention and the time of iodised salt addition to the recipe. The retention of iodine was observed to be a minimum in shallow frying with oil (52 ± 23%) and a maximum in pressure cooking (82.2 ± 6.2%). The data generated in this study would usefully augment the negligible information regarding iodine retention in recipes. © 2011 Elsevier Ltd. All rights reserved.

Singh V.,Gb Pant University | Agrawal H.M.,Gb Pant University | Joshi G.C.,Gb Pant University | Sudershan M.,UGC-DAE Consortium for Scientific Research | Sinha A.K.,UGC-DAE Consortium for Scientific Research
Applied Radiation and Isotopes | Year: 2011

The elemental profile of agricultural soil is important to study the various mechanisms of interaction among elements and their roles in plants growth. The chosen study site was the long term fertilization experiment (LTFE) field of the G.B. Pant University. The concentrations of 16 elements, namely Mg, Al, Si, Ca, K, Ti, V, Cr, Mn, Fe, Co, Cu, Zn, Rb, Sr and Pb have been determined in the soil samples by the EDXRF technique. The PCA method is used to interpret the elemental concentrations data. © 2011 Elsevier Ltd.

Dumka A.,University of Petroleum and Energy Studies | Dumka A.,Gb Pant University | Lal Mandoria H.,University of Petroleum and Energy Studies | Lal Mandoria H.,Gb Pant University
Advances in Intelligent Systems and Computing | Year: 2015

Multiprotocol feedback (MFB) protocol is suggested in this paper which suggest per hop base feedback mechanism in MPLS network including piggy backing in the algorithm, thus reduces the time needed for error detection and correction and also efficient for bandwidth utilization in the MPLS network. This is achieved by including a packet of 7 bit which carry three different types for correction and detection. Thus increases efficiency of MPLS network and also provide efficient method to find the error detection and correction and efficient for bandwidth utilization. © Springer International Publishing Switzerland 2015.

Singh V.,Gb Pant University | Agrawal H.M.,Gb Pant University
Radiation Physics and Chemistry | Year: 2012

Soil minerals study is vital in terms of investigating the major soil forming compounds and to find out the fate of minor and trace elements, essential for the soil-plant interaction purpose. X-ray diffraction (XRD) has been a popular technique to search out the phases for different types of samples. For the soil samples, however, employing XRD is not so straightforward due to many practical problems. In the current approach, principal component analysis (PCA) has been used to have an idea of the minerals present, in qualitative manner, in the soil under study. PCA was used on the elemental concentrations data of 17 elements, determined by the energy dispersive X-ray fluorescence (EDXRF) technique. XRD analysis of soil samples has been done also to identify the minerals of major elements. Some prior treatments, like removal of silica by polytetrafluoroethylene (PTFE) slurry and grinding with alcohol, were given to samples to overcome the peak overlapping problems and to attain fine particle size which is important to minimize micro-absorption corrections, to give reproducible peak intensities and to minimize preferred orientation. A 2. θ step of 0.05°/min and a longer dwell time than normal were used to reduce interferences from background noise and to increase the counting statistics. Finally, the sequential extraction procedure for metal speciation study has been applied on soil samples. Atomic absorption spectroscopy (AAS) was used to find the concentrations of metal fractions bound to various forms. Applying all the three probes, the minerals in the soils can be studied and identified, successfully. © 2012 Elsevier Ltd.

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