Exploiting Data Parallelism in the yConvex Hypergraph Algorithm for Image Representation using GPGPUs

To define and identify a region-of-interest (ROI) in a digital image, the shape descriptor of the ROI has to be described in terms of its boundary characteristics. To address the generic issues of contour tracking, the yConvex Hypergraph (yCHG) model was proposed by Kanna et al [1]. In this work, we propose a parallel approach to implement the yCHG model by exploiting massively parallel cores of NVIDIA's Compute Unified Device Architecture (CUDA). We perform our experiments on the MODIS satellite image database by NASA, and based on our analysis we observe that the performance of the serial implementation is better on smaller images, but once the threshold is achieved in terms of image resolution, the parallel implementation outperforms its sequential counterpart by 2 to 10 times (2x-10x). We also conclude that an increase in the number of hyperedges in the ROI of a given size does not impact the performance of the overall algorithm.Comment: 1 page, 1 figure published in Proceedings of the 27th ACM International Conference on Supercomputing, ICS 2013, Eugene, Oregon, US

Curo — Patient home recovery guide for stressfree and better recovery after hospitalization

The transition from in-hospital illness management to self-management exposes patients to many risks such as inadequate training before leaving the hospital and medication errors which can lead to patient re-hospitalization. Effective care after discharge can improve patients’ health, reduce chances of re-hospitalization and decrease healthcare costs. A patient leaves the hospital with a complex and verbose discharge summary. Once home they rely on this discharge summary to guide their recovery. Most of the printed summaries use medical jargon that informs the clinicians more than the patients. To help patients understand better, nurses go through the discharge papers with the patient and caregivers orally. Still, patients find it difficult to process and remember all this information. It becomes overwhelming. This makes them unprepared to manage their care at home. Often times the delicate mental and physical condition of the patient also contributes to the loss of information. All these factors open the opportunity for design intervention for the cause of better post-discharge patient care. This thesis provides an auxiliary design solution that provides patients with timely, easy to follow information without overwhelming them. Patients would focus on monitoring their health alone rather than struggling to understand complex hospital instructions. The interactive system serves as a guide that helps patients on their road to recovery. Finally, this thesis endeavors to make the process of patient recovery an easy and stress-free journey

A Nobel Approach for Entropy Reduction of Wireless Sensor Networks (WSN)

In contrast to RF, optical devices are smaller and consume less power; reflection, diffraction, and scattering from aerosols help distribute signal over large areas; and optical wireless provides freedom from interference and eavesdropping within an opaque enclosure. For a densely deployed Wireless Multimedia Sensor Network (WMSN), an entropy-based analytical framework is developed to measure the amount of visual information provided by multiple cameras in the network. The limitations of limited energy, processing power and bandwidth capabilities of sensors networks become critical in the case of event-based sensor networks where multiple collocated nodes are likely to notify the sink about the same event, at almost the same time. Data aggregation is considered to be an effective technique. Selective use of informative sensors reduces the number of sensors needed to obtain information about the target state and therefore prolongs the system lifetime. In this paper the use of entropy in spectrum sensing is also described. This sensing gives knowledge about the usage of spectrum by primary user and based on that a secondary user can utilize the unused spectrum without interfere the primary user