Chittagong University of Engineering & Technology

About: Chittagong University of Engineering & Technology is a education organization based out in Chittagong, Bangladesh. It is known for research contribution in the topics: Renewable energy & Dielectric. The organization has 1200 authors who have published 1444 publications receiving 10418 citations. The organization is also known as: Engineering College, Chittagong & Bangladesh Institute of Technology, Chittagong.

OPTSDNA: Performance evaluation of an efficient distributed bioinformatics system for DNA sequence analysis.

Abstract: Storage of sequence data is a big concern as the amount of data generated is exponential in nature at several locations. Therefore, there is a need to develop techniques to store data using compression algorithm. Here we describe optimal storage algorithm (OPTSDNA) for storing large amount of DNA sequences of varying length. This paper provides performance analysis of optimal storage algorithm (OPTSDNA) of a distributed bioinformatics computing system for analysis of DNA sequences. OPTSDNA algorithm is used for storing various sizes of DNA sequences into database. DNA sequences of different lengths were stored by using this algorithm. These input DNA sequences are varied in size from very small to very large. Storage size is calculated by this algorithm. Response time is also calculated in this work. The efficiency and performance of the algorithm is high (in size calculation with percentage) when compared with other known with sequential approach.

A Robust Text Dependent Speaker Identification Using Neural Responses from the Model of the Auditory System

Abstract: Speaker recognition is considered as a behavioral biometric to identify speaker's identity based on their voice features. In this study, a new speaker identification system is proposed based on the neural responses of human auditory system. For this, a very well-developed physiological based computational model of auditory periphery is used to simulate the neural responses for a given speech. The output, in the form of synapse responses, is then analyzed for the feature extraction. Neurograms are constructed for a range of characteristic frequencies from the output responses. Features are then calculated from the neurogram to train the system. The same extracted features for a given speaker are then used to identify the speaker in the testing phase. To test the reliability of the proposed system, the model has been tested both in quiet and noisy conditions. The results show that, neural response-based speaker identification system can substitute the existing technology and thus improve the performance for application of remote authentication and security system.

Evaluating Test Methods for Rapidly Assessing Fly Ash Reactivity for Use in Concrete

Abstract: In addition to various properties, including fineness and loss on ignition, used to assess fly ash, specifications covering the material as an addition in concrete normally include a measure of its pozzolanic activity. While variations exist, approaches commonly used involve testing the compressive strength of standard fly ash mortar, at different ages, and comparisons with the corresponding Portland cement control. Given the nature of the material, these can be carried out over extended periods (e.g. 90 days for Activity Index in BS EN 450-1). If the timescale was reduced, this could offer benefits with regard to fly ash testing and use. The paper will summarize various options in the literature towards achieving this and describe an investigation carried out to examine the potential of selected property measurements/techniques in the role. These include (i) fly ash characteristics: fineness, bulk chemistry and amorphous content; (ii) accelerated curing (elevated temperature) conditions for Activity Index and hydrated lime/fly ash mortars; and (iii) wet chemical tests involving lime-consumption. The methods were considered for a range of low-lime fly ashes covering different sources, seasonal variations and cocombustion, with evaluations made through comparisons against the Activity Index to BS EN 450-1. The paper will identify their relative effectiveness in assessing fly ash reactivity and explore how they relate to concrete. INTRODUCTION Fly ash has a long history of use in concrete, with early research investigating the material in this application dating back to the 1930s. Much of the work carried out on fly ash concrete has demonstrated that it offers a range of technical benefits, covering fresh and engineering properties, and aspects of durability. 3 Furthermore, it can provide environmental and economic advantages to construction. 4 Specifications for fly ash, corresponding to the period of the materials’ use, have been revised over time, to reflect experience gained and developments taking place in the power industry. One of the key characteristics, which can be traced to their early introduction, is a measure of fly ash reactivity (pozzolanic activity, see Table 1). 2013 World of Coal Ash (WOCA) Conference April 22-25, 2013 in Lexington, KY http://www.flyash.info/

Voltage Level and Transient Stability Enhancement of a Power System Using STATCOM

Abstract: The increased demands on transmission, absence of long term planning and need to provide open access to generating companies and customers have created tendency towards reduced quality of supply FACTS opens up new opportunities for controlling power and enhancing the usable capacity The Static Synchronous Compensator (STATCOM), based on voltage source inverter is a widely used FACTS device In this paper a 5-bus system is analyzed in term of voltage level and then optimum bus location is calculated to connect STATCOM to increase voltage level STATCOM is also connected to the mid-point of a line to investigate its effects on enhancing transient stability