Browsing by Author "SAGAR MAHMUD"

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    ANALYSIS OF MOBILE PHONE RADIATION EFFECT ON HUMAN BODY USING SPECIFIC ABSORPTION RATE20
    (2021-03-30) SAGAR MAHMUD
    The use of mobile phones is rising everyday both in civic and rustic areas in Bangladesh. Every mobile phone disperses electromagnetic energy. This radiation or electromagnetic wave can penetrate into the human body. Specific absorption rate and change in temperature are the vital parameter to find the dominant effects on the human body. Many researchers have done a lot of work on the effects of radiation for his or her country. But in Bangladesh, no visible work has been done yet. The importance of the health hazards due to radiation from the mobile phone has not been understood among the common people. Because it cannot be seen, felt or smelt and it is very hard to realize the evil part. Importance of mobile phone cannot be ignored because it’s helps to keep in touch with family, friends and others to perform various tasks. This paper explores the radiation impact of mobile phones. Mathematical equations are used to evaluate the specific absorption rate and change in temperature at skin, fat, bone, brain, eye, muscle tissues at the frequency of 800MHz, 900 MHz, 1800 MHz, 2100 MHz, 2.5GHz, 2.6GHz, 3.4GHz, 3.5GHz, and 3.6GHz respectively. The calculations are performed at different distances and exposure times of mobile phone. A simple radio frequency detection circuit has been designed to find the radiated power of different frequency. The highest specific absorption rate is calculated for skin, brain, eye tissue. Child tissue absorption rate is higher than the adult. When the radiated power of mobile phone is high the specific absorption rate for different tissue crosses the safety limit. This paper also recommends the ways to diminish the effects of SAR. It is suggested that these methods will decrease the health risks. This work will be very helpful to understand the bad effect of using mobile phones and the way of reducing this effect.
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    MODEL DEVELOPMENT FOR COMBINED UNIVERSITY ADMISSION SYSTEM IN RESPECT OF BANGLADESH
    (2018-11-30) SAGAR MAHMUD
    Education encompasses our lives and as the foundation of our society. Inefficient admission system reduces the number of efficient students in the university due to its speed, delay and harassment. The number of students seeking higher education in Bangladesh is increasing in a good rate every year. Student admissions are playing very important role in major activities of any university. The basic requirement of the university is students ,without students university cannot survive. It affects the overall resources of the universities and its quality constraints. University admission process in Bangladesh is very complex, time-consuming and costly. There are many types of universities in Bangladesh. Admission process is different from one university to another university so suffering of candidates is very high. Some universities authority agrees to take integrated admission system and some authority is not interested to take integrated admission. There is no such admission model to solve this problem. So better admission process is necessary to solve this problem. This paper proposed some model for combined admission test. The focus of this paper is to identify those models, which can reduce the limitation of the traditional admission system and provide a quality admission process. For proposing model, we had gone through the different country admission process, technical papers of this field, find out necessary data from online and survey so that we can easily planning, analyzing, design, and testing. This paper presents three model that serves as the core design for a university admission recommender system.