Refine your search
Co-Authors
Year
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Padmavathy, T. V.
- PELLMAC:A Power Efficient and Low-Latency MAC Protocol for Wireless Sensor Networks Using Hybrid Algorithms
Abstract Views :174 |
PDF Views:2
Authors
Affiliations
1 Department of Electronics and Communication Engineering, R.M.K. College of Engineering and Technology, affiliated to Anna University, IN
2 Department of Information and Technology, Sona College of Technology, Salem, IN
1 Department of Electronics and Communication Engineering, R.M.K. College of Engineering and Technology, affiliated to Anna University, IN
2 Department of Information and Technology, Sona College of Technology, Salem, IN
Source
Wireless Communication, Vol 3, No 1 (2011), Pagination: 1-10Abstract
A Wireless Sensor Network consists of a large number of distributed sensor nodes with embedded processors, low power radios, and a battery. They have a wide range of potential applications, including environment monitoring, space exploration, physical detection, military scouting, manufacturing, and industry automation. Medium Access Control (MAC) protocols are used to allow multiple nodes to share scarce bandwidth in an orderly and efficient manner. The key concern of MAC design in wireless sensor networks is energy consumption since sensor nodes are battery powered. In this paper, an adaptive, energy efficient, and low latency MAC protocol called Power Efficient Medium Access Control (PELLMAC) is proposed for wireless sensor networks. Each node has three modes: sleep, receive, and send. Each node goes to sleep periodically to save energy. In PELLMAC, we have introduced the staggered scheduling and adaptive sleep concepts to reduce the idle listening period and reduce energy consumption. Simulation results show that PELLMAC achieves lower energy consumption and latency than S-MAC.Keywords
Energy Efficient, Low Latency, NS-2, Hybrid Algorithm, Wireless Sensor Networks.- Image Enhancement by Microwave Double and Multiple Irradiations for Early Diagnosis of Breast Carcinoma
Abstract Views :143 |
PDF Views:2
Authors
Affiliations
1 Department of Electronics and Communication Engineering, R.M.K. College of Engineering and Technology, IN
2 Department of Electronics and Communication Engineering, College of Engineering, Anna University, Guindy, IN
1 Department of Electronics and Communication Engineering, R.M.K. College of Engineering and Technology, IN
2 Department of Electronics and Communication Engineering, College of Engineering, Anna University, Guindy, IN
Source
Biometrics and Bioinformatics, Vol 3, No 4 (2011), Pagination: 151-157Abstract
Cancer is the uncontrolled growth of abnormal cells;if not detected and treated at the early stage cancer would become fatal. Early detection of the disease increases the survival rate. Though there are several diagnostic methods, each method is having its own merits and demerits. In this paper, a method of obtaining an active thermo gram by irradiating the patient’s breast twice, thrice using a microwave source of 2450 MHz and allowing them to cool naturally after every radiation is proposed. Results of the experiments conducted using phantom models show the temperature difference between the cancerous and normal breast tissues is increased by the first irradiation considerably;the second irradiation further elevated the temperature difference between the normal and breast tissues. The third irradiation did not have any impact. Results obtained show that both the double irradiation technique and triple irradiation technique produce a temperature difference of 6.75°C between the normal and cancerous breast tissues for a cancer tumor which produces a temperature difference of 1°C between normal and cancerous tissues by passive radiation. Hence there is a marked intensity variation between the normal and cancerous tissues of the breast in thermogram are produced by double irradiation and triple irradiation which makes the early diagnosis of breast carcinoma possible. Since even the third irradiation did not have any impact on the temperature difference between the normal and cancerous breast tissues multiple irradiations is not superior to double irradiation for early diagnosis of breast carcinoma. A thermogram of normal breast is taken as a base line image to simulate the images that would be produced by the proposed method; MATLAB7.1 is used for simulating 38°C, 41°C, 43.75°C thermal images. Thermal images for 37°C, 38°C, 39°C, and 43.75°C were taken using Thermal images (FLIR system-Model FLIR i5-Sweden).Keywords
Breast Carcinoma, Double Irradiation, Multiple Irradiation, Early Diagnosis, Image Enhancement, MATLAB7.1, Microwave, Thermal Imaging.- Hybrid Irradiation by FIR and Microwave Sources for Early Detection of Breast Carcinoma
Abstract Views :189 |
PDF Views:3
Authors
Affiliations
1 Department of Electronics and Communication Engineering, R.M.K. College of Engineering and Technology, IN
2 Department of Electronics and Communication Engineering, College of Engineering, Guindy, Anna University, IN
3 Department of Information and Technology, R.M.K. College of Engineering and Technology, IN
1 Department of Electronics and Communication Engineering, R.M.K. College of Engineering and Technology, IN
2 Department of Electronics and Communication Engineering, College of Engineering, Guindy, Anna University, IN
3 Department of Information and Technology, R.M.K. College of Engineering and Technology, IN