From practical and theoretical viewpoints, performance analysis of communication systems by using information-theoretic results is important. In this paper, based on our previous work on Multiple Access Channel (MAC) and Multiple Access Relay Channel (MARC), we analyze the impact of a relay on the fundamental wireless communications concept, i.e., coverage region of MARC, as a basic model for u...

This paper analyzes the impact of using search engines on the user's privacy. Several privacy related issues were found, such as search engines leaking the query string to advertising companies or sharing user identifiers with other sites. This paper will show the way this is accomplished as well as possible countermeasures to be taken by the user to preserve her privacy.

Introduction Cattle have been domesticated for centuries and hence have had long history of close association with humans. Cattle harbor several microbes that have the potential to cause disease in humans. These zoonotic diseases consist of 2 groups, those transmitted primarily by direct contact with cattle and those spread indirectly. As the population in western society increasingly shifts fr...

Main results At the individual level, the perception of fair or poor health was strongly associated with age, sex, socio-economic position (as measured by education and household income), smoking, obesity, and infrequent exercise. Overall, a handful of individual factors accounted for much of the variation between health regions in reporting of fair or poor health. There was an additional influ...

The main object of this paper is to introduce and investigate two new classes of generalized Apostol-Euler and Apostol-Genocchi polynomials. In particular, we obtain a new addition formula for the new class of the generalized Apostol-Euler polynomials. We also give an extension and some analogues of the Srivastava-Pintér addition theorem obtained in the works by Srivastava and Pintér 2004 and R...

Studies have generally found rural residents to be less concerned about environmental problems than urbanites. This difference has been attributed primarily to a nature-exploitative attitude of famters. The present study finds little support for this proposition, but an alternative explanation, derived from rational choice and exchange theory, is supported. Owneroperator fanners are different f...

In this paper, we obtain a general achievable rate region and some certain capacity theorems for multiple-access relay channel (MARC), using decode and forward (DAF) strategy at the relay, superposition coding at the transmitters. Our general rate region (i) generalizes the achievability part of Slepian-Wolf multiple-access capacity theorem to the MARC, (ii) extends the Cover-El Gamal best achi...

We investigate the problem of a collaborative digital library collection that allows librarians and non-librarians alike to share information on specific topics through MARC records. Many existing software tools for creating bibliographic records are not platform independent. Tools that are platform independent are integrated into library software and therefore cannot be used with any existing ...