CHCS Triangular Prism with Exactly One Right Angled Prismatic Edge
Pranab Kalita, Bichitra Kalita
Abstract
Andreev’s Theorem provides a full description of 3-dimensional compact hyperbolic combinatorial polytope having non-obtuse dihedral angles. Prism is one of such polytope. In this article, with the help of Andreev’s Theorem, we have developed some properties of CHCS (compact hyperbolic coxeter symmetric) triangular prisms with exactly one right angled prismatic edge, which are facilitated by the link of graph theory and combinatorics, and it has been found that the number of CHCS triangular prisms with prismatic edges of order are three, five, five and zero respectively upto symmetry.
Download Full Text 
Big Data Analysis using R and Hadoop
Anju Gahlawat
Abstract
The way Big data - heavy volume, highly volatile, vast variety and complex data - has entered our lives, it is becoming day by day difficult to manage and gain business advantages out of it. This paper describes as what big data is, how to process it by applying some tools and techniques so as to analyze, visualize and predict the future trend of the market. The tools and techniques described in this paper using the best of R language which is the future of the statistics and the Hadoop which is a parallel processing for the data so as to get a blend of best data model being processed over Big data parallelly. The integration of R and Hadoop give us the brand new environment where in R code can be written and deployed in Hadoop without any data movement. Using R and Hadoop helps organization to resolve the scalability, issues and solve their predictive analysis with high performance. You can have a much better deep dive over the big data when combined R and Hadoop.
Download Full Text
Spectrum Sensing Using Bayesian Method for Maximum Spectrum Utilization in Cognitive Radio
Anurama Karumanchi, Mohan Kumar Badampudi
Abstract
With increase demand for spectrum, it is necessary to detect the spectral holes in the static frequency assignment. Using cognitive radio the spectrum can be sensed to increase the efficient usage of spectrum by secondary users when the MPSK (M>2) modulated primary user is idle. In this paper we have derived an optimal Bayesian detector for MPSK modulated primary user over AWGN channel with corresponding suboptimal detector in low and high SNR walls. We give an analysis of detection based methods like energy detector, cyclostationary detector, and matched filter detector with Bayesian method. The performance of spectrum sensing methods is verified using the simulation results.
Download Full Text
A Multidimensional Corporate Social Responsibility Study
Maria José Sousa and Teresa Duarte
Abstract
This paper intends to contribute to a better understanding of the corporate social responsibility (CSR) in Portuguese Small and Medium Enterprises (SME). In the Portuguese context, where SME represent the majority of companies in the country, the social responsibility is many times confused with philanthropy or patronage, being an occasional practice and not aligned with the company’s business. Some authors question themselves if some types of actions can be called CSR or if they are only to be seen as altruism or even political actions in order to achieve business success. Supported by several case studies in Portuguese SME, some of the questions that led this research were: Do the SME studied have CSR practices? If so, what kind of practices? Which is the content and scope of these practices? Are they integrated with the SME business strategies?
Download Full Text