Christ University

About: Christ University is a education organization based out in Bengaluru, India. It is known for research contribution in the topics: Computer science & Convection. The organization has 2267 authors who have published 2715 publications receiving 14575 citations. The organization is also known as: Christ College & Christ University.

Spider Diversity in Kavvayi River Basin, Kerala, Southern India

Abstract: Kavvayi river basin is a typical lateritic biotope situated in the Northern part of Kerala, which holds various ecological units such as lateritic vegetation, agro-ecosystems, seasonal pools, Grass lands, Kanams, Sacred groves, Mangrove-marsh and riparian vegetation. Many of these microhabitats are unique in character and poorly documented. A preliminary study was conducted to document the diversity of spider fauna inhabiting in the different ecosystems of Kavvayi river basins.India is having 1,686 species of spiders belonging to 60 families and 438 genera, which constitutes 3.6% of world’s spider population. The present study resulted in the documentation of 112 species of spiders belonging to 81 genera and 21 families. Araneidae was the most dominant family which constitutes 21.5% of the total spider species collected. The second dominant family was Salticidae which constitutes 19.5% of total spider population. Guild structure analysis of the collected spiders revealed seven feeding guilds, namely stalkers, orb web builders, ambushers, foliage runners, space web builders, ground runners and wandering sheet weavers. The spider fauna of this ecosystem is qualitatively rich due to varied microhabitats, which supports high floral and faunal diversity. The present study suggests a detailed investigation at ecosystem level to understand the role of spiders in ecosystem function. Current World environment Journal Website: www.cwejournal.org ISSN: 0973-4929, Vol. 13, No. (1) 2018, Pg. 100-112 ContACt Ashtamoorthy Sreejith dr.sreejithnamboodiri@gmail.com Kerala Forest Research Institute, Peechi, Thrissur, Kerala

Adaptive algorithms in smart antenna beamformation for wireless communication

Abstract: The challenges for today's wireless communication technology are increased data rates, channel capacity and spectrum efficiency with reduced interference. The adaptive antenna array is capable of adapting to the varying signal environments automatically and forms beams in the directions of the desired signals by steering nulls in the directions of interfering signals. Therefore smart antenna is the best solution to overcome the above mentioned challenges. Smart antennas uses advanced digital signal processing algorithms to enhance the detection of desired users in an interfering environment through spatial filtering. In this paper we will discuss the influence of Least Mean Squares (LMS), Recursive Least Squares (RLS) and Normalized Least Mean Square (NLMS) algorithms in adaptive beamforming. The simulations used for the study are carried out using MATLAB R2013a.

Parity Labeling in Signed Graphs

Abstract: Let $S=(G, \sigma)$ be a signed graph where $G=(V, E)$ is a graph called the underlying graph of $S$ and $\sigma:E(G) \rightarrow \{+,~-\}$. Let $f:V(G) \rightarrow \{1,2,\dots,|V(G)|\}$ such that $\sigma(uv)=+$ if and only if $f(u)$ and $f(v)$ are of same parity and $\sigma(uv)=-$ if and only if $f(u)$ and $f(v)$ are of opposite parity. Under $f$ we get a signed graph $G_f$ denoted as $S$, which is a parity signed graph. In this paper, we initiate the study of parity labeling in signed graphs and we define and find `rna' number denoted as $\sigma^-(S)$ for some classes of signed graphs. We also characterize some signed graphs which are parity signed graphs. Some directions for further research are also suggested.

Biologically Important Schiff Bases and Their Transition Metal Complexes

Abstract: Transition metal complexes with different ligand systems have been developed. Majority of them are derived from heteroaromatic cycles and Schiff bases of variety of aromatic aldehydes, diketones with amino acids, polyamines, N-aromatic cycles and ethylenediamines. Metal complexes of Schiff bases are used as polymers, dyes and in various biological systems. They show antimicrobial activity and can be used as suitable drug to treat bacterial and fungal infections. Most of the Cu, Ni and Co complexes are also capable of binding and cleaving DNA.

Polymorphism in the Spider, Theridion ovatum

Abstract: REFERENCE has often been made1–3 to the colour varieties of Theridion ovatum. According to Locket and Millidge4, the abdomen may have one of three colour patterns: Clerk's lineatum, abdomen creamy white; Clerk's redimitum, abdomen with a pair of wide longitudinal carmine stripes; Clerk's ovatum, abdomen dorsally covered with carmine. Field observations confirm that these varieties are polymorphic, in accordance with the accepted definition5 for genetic polymorphism.