Integrated channel assignment and power control in cellular networks using hill-climbing approach.

Recent year\u27s incredible success and exponential growth of wireless cellular network services have necessitated careful management of radio resources to improve system capacity. Mainly due to the insufficiency of radio spectrum, reuse or sharing of radio frequency must be considered. In practical, the sharing of radio frequency introduces interferences among users, which in turn limit the system capacity. On the other hand, control of transmitter power can suppress co-channel interference, adjacent channel interference and limits the consumption of power. Thus channel assignment and power control are two effective means in wireless cellular networks and they are highly correlated to each other. Most of the existing papers have focused on optimizing the assignment of channels assuming that the allocation of transmitter power is known and fixed or vice-versa. In this thesis, we study the integration of channel assignment and power control simultaneously to increase the network capacity and throughput. We have proposed a new channel assignment approach, called HCA-PC (Hybrid Channel Assignment + Power Control) using dynamic reuse distance concept to optimize the channel assignment. We develop a Hill-climbing approach with random restart strategy, using an efficient problem representation and a fitness function that optimizes channel assignment and power control in the cellular network. (Abstract shortened by UMI.) Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis2003 .V52. Source: Masters Abstracts International, Volume: 44-03, page: 1392. Thesis (M.Sc.)--University of Windsor (Canada), 2005

Rape in Rural Bangladesh

Background: Rape is one of the silent brutal sexual offences in Bangladesh. Despite strong laws against it, the evil of rape continues to rise. Increasing trend of the silent cruel sexual offence (rape) represents a major psychopath sexual disorder and public health problem and progress of the country. Objective: The aim of the study was to determine the pattern of alleged rape victims in a rural district of Bangladesh with the ultimate aim to create public awareness about the brutal crime. Materials and method: This retrospective study was carried out on 330 sexually assailed alleged rape victims’ report forms, who reported at Faridpur Medical College, Bangladesh from 2007 to 2011 for medical examination. Results: Among the study subjects maximum number (70.0%) of alleged rape cases were under the age of 20 years. More than two-thirds (64.60%) of the assailants were known to the victims, most of the incidents (64.20%) occurred in the victims’ houses and nearby places. The study also revealed that minimum number of victims (14.20%) reported within 24 hours for medical examination. Almost one fourth of the alleged rape cases were gang rape and no positive finding in favour of sexual intercourse was found in about three fourth (72.40%) of cases. Conclusion: Public awareness about rape would be effective to report in due time with preserving the evidence of crime and modern techniques like DNA diagnosis may be of help to detect the assailant