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A GVT Based Algorithm for Butterfly Barrier in Parallel and Distributed Systems
No full textThe final publication is available at www.springerlink.comMattern’s GVT algorithm is a time management algorithm that helps achieve the synchronization in parallel and distributed systems. This algorithm uses ring structure to establish cuts C1 and C2 to calculate the GVT. The latency of calculating the GVT is vital in parallel/distributed systems which is extremely high if calculated using this algorithm. However, using synchronous barriers with the Matterns algorithm can help improving the GVT computation process by minimizing the GVT latency. In this paper, we incorporate the butterfly barrier to employ two cuts C1 and C2 and obtain the resultant GVT at an affordable latency. Our analysis shows that the proposed GVT computation algorithm significantly improves the overall performance in terms of memory saving and latency.http://link.springer.com/chapter/10.1007%2F978-90-481-3660-5_10
Performance Analysis of Multimedia Compression Algorithms
No full textIn this paper, we are evaluating the performance of Huffman and Run Length Encoding compression algorithms with multimedia data. We have used different types of multimedia formats such as images and text. Extensive experimentation with different file sizes was used to compare both algorithms evaluating the compression ratio and compression time. Huffman algorithm showed consistent performance compared to Run Length encoding
A Study of the Relationship between Head Related Transfer Functions and Elevations
No full textHead Related Transfer Functions (HRTFs) are signal processing models that represent the transformations undergone by acoustic signals, as they travel from their source to the listener’s eardrums. The study of HRTFs is a rapidly growing area with potential uses in virtual environments, auditory displays, the entertainment industry, human-computer interface for the visually impaired, aircraft warning systems, etc. The positioning of the sound source plays a major role in the resonant frequency of the HRTFs. In this paper, we examine the effect of changing the elevations of these sources; we examine the effect on the first peak and the first notch of HRTFs. We use the HRTF database at FIU DSP lab. This database hosts the HRTFs from 15 subjects and their 3-D images of conchas. For each subject, the database contains the Head Related Impulse Responses (HRIRs) for the sound sources placed at six elevations (54°, 36°, 18°, 0°, -18° and -36°) and twelve azimuths (180°, 150°, 120°, 90°, 60°, 30°, 0°, -30°, -60°, -90°, -120° and -150°). A relationship between the first peak or notch and the elevation can help us model HRTFs mathematically. This can reduce the size of a HRTF database and can increase the speed of HRTF related computations
A Self-repairable MEMS Comb Accelerometer
No full textThe final publication is available at www.springerlink.comIn this paper, a built-in self-repair technique for the MEMS comb accelerometer device is proposed. The main device of the comb accelerometer consists of n identical modules, and m modules are introduced as the redundancy. If any of the working module in the main device is found faulty during a built-in self-test (BIST), the control circuit will replace it with a good redundant module. In this way, the faulty device can be self-repaired through redundancy. The implementation of dualmode BIST on the BISR module is discussed. The sensitivity loss due to device modularization can be well compensated by different design alternatives. The yield model for MEMS redundancy repair is developed. The simulation results show that the BISR (built-in self-repair) design leads to effective yield increase compared to non-BISR design, especially for a moderate non-BISR yield. The yield as well as the reliability of the accelerometer can be improved due to the redundancy repair.http://link.springer.com/chapter/10.1007%2F1-4020-5261-8_1
Developing a New Graduate Program in Sustainable Energy Engineering
No full text© ASEE 2010The world energy demand keeps increasing in recent years due to the rapidly rising living standards and expanding populations. However, the non-renewable energy resource, fossil fuels, is running out and the crude oil supply from Middle East is unstable. To meet the energy demand and improve the energy security, developing sustainable energy, such as solar, wind, tide, geothermal, biomass energy, is a solution to this most urgent energy problems. Therefore, the rapidly increasing nationwide demand for well-qualified professionals in the sustainable energy can be predicted. In order to educate and prepare the technical and scientific workforce for the emerging sustainable energy technology, the School of Engineering at University of Bridgeport (UB) is preparing the M.S. Sustainable Energy Engineering program. In this paper, the structure of the curriculum and the course design in this program will be presented in more details
The Journal of Global Development and Peace Spring 2010
No full textThe Journal of Global Development and Peace for the spring of 2010. This issue contains articles by Dr. Zhu on China's New Diplomacy Towards Southeast Asia: Motivations, Strategies, and Implications, Dr. Wei on From Mao Back to Confucius: China's Approaches to Development and Peace, Eduardo Daniel Oviedo on the New International Role of China and its Relations with Argentina in Times of Crisis, Alex Kuzminov on Maybe We Should Look at Other Countries, Dr. Ward on Israel and Palestine - Looking ahead Twenty Five Years a Symposium Report, Dr. Rubenstein on Changing Demographics and the Middle East, Dr. Zhu on China's Global Hunt for Oil, and Dr. Rubenstein on "Will the President be able to resolve the Middle East crisis
