North Eastern Regional Institute of Science and Technology

About: North Eastern Regional Institute of Science and Technology is a education organization based out in Itanagar, India. It is known for research contribution in the topics: Population & Raman spectroscopy. The organization has 813 authors who have published 1429 publications receiving 16122 citations.

Design of an Efficient Fuzzy based Cluster Routing Protocol in Wireless Sensor Networks

Abstract: In this paper, an attempt has been made to increase the transmission efficiency and network lifetime of a wireless sensor network (WSN) by clustering method using Fuzzy logic. Here, the cluster head (CH) is elected based on the Fuzzy logic. Enhancement of lifetime for the nodes operating in WSN is an important issue that needs to be resolved for increasing the system efficiency and performance. The technique of clustering has found large number of benefits with respect to achieving system efficiency and least energy consumption. The protocols employed in an intelligent WSN should favor maximum transmission efficiency and provide maximum network lifetime from the utilized algorithm that is exactly attempted to be achieved through this method. The first node dead (FND) and the lifetime of the network using the fuzzy logic in the proposed work are compared with four other mechanisms. Both FND and lifetime are found to be better in the present work which provides an efficient approach for WSN.

Secure Non-Consensus Based Spectrum Sensing in Non-Centralized Cognitive Radio Networks

Abstract: In a non-centralized cognitive radio network, secondary users (SUs) cooperate in order to determine the presence of the primary user (PU) signal. This can be accomplished by each node sharing its spectrum sensing result with its neighboring SUs. In this paper, a non-consensus based distributed spectrum sensing (NCSS) scheme is presented, in which a node uses the raw energy level of the PU signal from its $h$ -hop neighbors for determining the status of the PU. A message passing scheme is used rather than the conventional consensus scheme. A comparison with an existing consensus algorithm is also shown. Further, two types of spectrum sensing data falsification attacks are considered in which the attackers inject very high or very low energy values. To catch such abnormal behavior of a node, an approach called secure NCSS algorithm is proposed, which isolates a node that generates extreme energy values so that it is removed from future computation. For this, an outlier detection technique is adopted. The approach is based on the idea that a malicious node’s energy level deviates significantly from those of genuine nodes, whereas all genuine nodes share nearby estimated energy levels.

Cadmium(II)bis(oxalato)cobaltate(II)- pentahydrate

Abstract: A mixed metal carboxylate, cadmium(II)bis(oxalato)cobaltate(II)pentahydrate, has been synthesized and characterized by elemental analysis, IR spectral, reflectance and X-ray powder diffraction studies. Thermal decomposition studies (TG, DTG and DTA) in air showed that the compound decomposed to CdCoO3 at 370°C through the formation of an anhydrous compound at ~194°C. Finally, CdCoO2 is generated at 1000°C. DSC study in nitrogen up to 550°C showed the formation of a mixture of CdO and Co3O4 as end products. The kinetic parameters have been evaluated for the dehydration and decomposition steps using four non-mechanistic equations, i.e., Freeman and Carroll, Coats and Redfern, Flynn and Wall, MacCallum and Tanner equations. Using seven mechanistic equations, the rate controlling processes of the dehydration and decomposition mechanism are also inferred. The kinetic parameters, DH and DS obtained from DSC are discussed. IR and X-ray powder diffraction studies identified some of the decomposition products. A tentative mechanism for the decomposition in air is proposed.

Geospatial technology based diversity and above ground biomass assessment of woody species of West Kameng district of Arunachal Pradesh

Abstract: Comprehending the prominence of forest carbon in climate change, this study was piloted in different land use of West Kameng district, Arunachal Pradesh, India to record the floristic composition, ...

Atom-Economical and Metal-Free Synthesis of Multisubstituted Furans from Intramolecular Aziridine Ring Opening.

Abstract: Multisubstituted furans were prepared from dialkyl 2-(aziridin-2-ylmethylene)malonate and/or 1,3-dione through aziridine ring opening by the internal carbonyl oxygen with the assistance of BF3·OEt2, followed by aromatization. This synthetic method is free from any metal and is atom-economical with all of the atoms in the starting material retained in the final product.