Publications (2)0 Total impact
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Conference Proceeding: A Novel Approach for Edge Detection using AntColony Otimization and Fuzz Derivative Technique
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ABSTRACT: An approach involving a new ant colony optimization (ACO) and fuzzy derivative is presented to tackle the image edge detection problem. Ant colony optimization (ACO) is inspired from the foraging behavior of some ant species which deposit pheromone on their way. Ant colonies and more generally social insects act as a distributed system presenting a highly structured social organization. They communicate with each other by modifying the environment (stigmergy). The number of ants acting on the image is decided by the variation of fuzzy probability factor calculated from fuzzy derivatives which establishes a pheronone matrix. To avoid the movement of ants due to the variation of intensity caused by noise we use fuzzy derivative approach to make sure that the variation of intensity due to an edge is reflected in the probabilistic transition matrix. Finally a binary decision is made on the pheromone matrix by calculating a threshold adaptively.Advance Computing Conference, 2009. IACC 2009. IEEE International; 04/2009 -
Article: The prevalence of pressure ulcers in hospitalised patients in a university hospital in India.
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ABSTRACT: To estimate the prevalence of pressure ulcers in hospitalised patients and any underlying or predisposing factors to ulceration. This cross-sectional study took place in a university hospital in Varanasi, India. A total of 445 patients hospitalised in medical and surgical wards were examined in a single day for the number, site and grade of pressure ulcers. Haemoglobin, serum albumin and blood sugar levels of patients with pressure ulcers were recorded. The prevalence of pressure ulcers was high (4.94%). Anaemia, malnutrition and diabetes were important risk factors, while morbidity due to pressure ulcers in long-stay wards, such as neurology, was exceptionally high (40.9%). Pressure ulcers remain one of the most neglected aspects of health-care provision in India and identifying their associated risk factors at an early stage may go a long way in preventing their occurrence.Journal of wound care 02/2005; 14(1):36-7.
