http://dspace.ewubd.edu:8080/handle/123456789/1027 2026-04-04T15:03:16Z http://dspace.ewubd.edu:8080/handle/123456789/1521 Spectrum Sensing of Cognitive Radio Network Under Linear Combination of Gaussian Random Variables D’ Costa, John; Nazimuzzaman, Muhammad In this project work we studied the Spectrum Sensing techniques for Cognitive Radio (CR) and derived Probability of Detection (PD) and Probability of False Alarm (PF) of a Cognitive Radio Network (CRN). Here we considered the test statistics as the weighted sum of the Gaussian random variables where the weighting factor depends on the eigenvalues of covariance matrix of Multiple-Input-Multiple-Output (MIMO) channel with Additive White Gaussian Noise (AWGN). We calculated PD and PF by changing channel parameters like number of sample values to find the threshold Signal-to-Noise Ratio (SNR) within condition PD above 80% and PF less than 8%. This thesis submitted in partial fulfillment of the requirements for the degree of Masters of Science in Applied Physics and Electronics of East West University, Dhaka, Bangladesh 0009-01-01T00:00:00Z http://dspace.ewubd.edu:8080/handle/123456789/1307 Design & Developing of a Microcontroller Based Smart Home Appliance Control System Paul, Hiranmoy; Majumder, Ajit Chandra The price of electricity is gradually increasing all over the world. In Bangladesh the price is also increasing day by day. In these circumstances, the users will try to minimize the wastage of electricity. In this project, a smart control system for home appliances has been developed to minimize the electricity wastage. The systems will automatically shutdown the electrical loads when the last person leaves the room. When the first person enters the room the loads will get power and can be run by their switches. If a person enters the room the system will increase its count by one and when a person leaves the room it will decrement its count. When the value of count is zero the power will be cut off. To count the number of persons in the room optical sensors have been used. An Arduino Uno board has been used to count the persons and control the power to the load. A program has been developed using Arduino software. The system has been constructed and tested. It is found that the system works properly. This thesis submitted in partial fulfillment of the requirements for the degree of Masters of Science in Applied Physics and Electronics of East West University, Dhaka, Bangladesh 0012-01-01T00:00:00Z http://dspace.ewubd.edu:8080/handle/123456789/1304 Research Project on Spectrum Sensing of Cognitive Radio Network under Linear Combination of Gaussian Random Variables D’ Costa, John In this project work we studied the Spectrum Sensing techniques for Cognitive Radio (CR) and derived Probability of Detection (PD) and Probability of False Alarm (PF) of a Cognitive Radio Network (CRN). Here we considered the test statistics as the weighted sum of the Gaussian random variables where the weighting factor depends on the eigenvalues of covariance matrix of Multiple-Input-Multiple-Output (MIMO) channel with Additive White Gaussian Noise (AWGN). We calculated PD and PF by changing channel parameters like number of sample values to find the threshold Signal-to-Noise Ratio (SNR) within condition PD above 80% and PF less than 8%. This thesis submitted in partial fulfillment of the requirements for the degree of Masters of Science in Applied Physics and Electronics of East West University, Dhaka, Bangladesh. 0012-01-01T00:00:00Z http://dspace.ewubd.edu:8080/handle/123456789/1058 Automation of Neutron Activation Analysis Barua, Sumitra Utilization of power research reactor is often pursued due to increasing rate of the neutron activation analysis (NAA) activities. There are a lot of samples available obtained from different fields for measurement. Often requires a number of human interventions for data processing in NAA. Otherwise liquid nitrogen is wasted for proper utilization. Automation of NAA consists of some methods those can improve the efficiency and reliability of analysis. Automation of NAA requires a significant effort for the development and implementation of software, hardware and data management. The hardware requires a mechanical design for auto sample changer by pneumatic system. The job program for routine automation is provided by MAESTRO-32 software. When a counting is stopped, it executes an application program for serial interfacing with micro controller. The micro controller executes its instructions for sample changing by pneumatic system. The sample goes through the pneumatic system from rotary rack to the detector. Then the micro controller sends an acknowledgement to the windows application program and the job program is started for next counting. This thesis submitted in partial fulfillment of the requirements for the degree of Masters of Science in Applied Physics and Electronics of East West University, Dhaka, Bangladesh 0009-01-01T00:00:00Z