Scientific Research and Essays

  • Abbreviation: Sci. Res. Essays
  • Language: English
  • ISSN: 1992-2248
  • DOI: 10.5897/SRE
  • Start Year: 2006
  • Published Articles: 2738

Table of Content: 6 September; 7(35)

September 2012

Utility based channel assignment: A centralized channel assignment mechanism for multi radio multi channel wireless mesh networks

In this paper, we address the channel assignment problem in a multi-radio mesh network that involves assigning channels to radio interfaces for eliminating the effect of wireless interference. Due to the insufficient number of frequency channels and available radios per node, interference is still present which limits the available bandwidth on wireless links and eventually decreases the achievable throughput. In this...

Author(s): Maryam Amiri Nezhad, Llorenç Cerdà-Alabern and Manel Guerrero Zapata

September 2012

Resilience of physiological attributes of wheat (Triticum aestivum L.) to abiotic stresses

Water stress and high temperature variability are the major constraints for wheat crop productivity and food security in the context of climate change. Impact of high temperature and water stress at anthesis stage of spring wheat was studied through field experiments conducted during 2008 to 2009 and 2009 to 2010. Five wheat varieties of diverse origin namely Tatara, National Agricultural Research Centre (NARC)-2009,...

Author(s): M. Ahmed and Muhammad Asif, Fayyaz-ul-Hassan, Zammurad Iqbal Ahmed and Arshad Nawaz Chaudhry

September 2012

Improving QoE in multicast IPTV systems: Channel zapping times

The usage of Internet Protocol TV (IPTV) deployments in the consumer electronics market is growing very popular in recent years. In IPTV multicast systems, quality of experience is a very critical factor for user satisfaction. Existing and future IPTV systems will offer a large number of channels to users. The most important factors that affect the quality of experience in IPTV systems are channel zapping times....

Author(s): Sibel MalkoĊŸ, Erdem Uçar and Rafet Akdeniz

September 2012

Iris recognition system based on video for unconstrained environments

This paper proposes an iris image quality and segmentation accuracy evaluation method for video-based iris recognition systems, operating in unconstrained environment. Proposed approach consists of two stages of video quality evaluation that allows improving the iris recognition rates in non-ideal or no cooperative situations; where the first stage discards the low quality eye frames, while the second stage discards...

Author(s): Juan Colores-Vargas, Mireya García-Vázquez, Alejandro Ramírez-Acosta, Mariko Nakano-Miyatake and Héctor Perez-Meana