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4 results on '"Narasimhan, V Lakshmi"'

1. Detailed Theoretical Considerations for a Suite of Metrics for Integration of Software Components.

Author

Sobh, Tarek, Elleithy, Khaled, Narasimhan, V. Lakshmi, and Hendradjaya, B.

Abstract

This paper defines two suites of metrics, which cater static and dynamic aspects of component assembly. The static metrics measure complexity and criticality of component assembly, wherein complexity is measured using Component Packing Density and Component Interaction Density metrics. Further, four criticality conditions namely, Link, Bridge, Inheritance and Size criticalities have been identified and quantified. The complexity and criticality metrics are combined into a Triangular Metric, which can be used to classify the type and nature of applications. Dynamic metrics are collected during the runtime of a complete application. Dynamic metrics are useful to identify super-component and to evaluate utilisation of components. In this paper both static and dynamic metrics are evaluated using Weyuker's set of properties. The result shows that the metrics provide a valid means to measure issues in component assembly. [ABSTRACT FROM AUTHOR]

Published
2006
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2. An Event Algebra Based System for Verifying E-Commerce Transactions.

Author

Zhao, Renyi and Narasimhan, V. Lakshmi

Subjects
ELECTRONIC commerce, TRANSACTION systems (Computer systems), REAL-time computing, COMMERCE, INFORMATION superhighway
Abstract

This paper describes extensions to a Behavioural Description Language (BDL), which was originally proposed to characterize concurrent behaviour of simple objects and a group of objects. One of the novelties of this paper is its application to the field of E-Commerce transaction systems. Based on the BDL, we propose new concepts, namely, transaction patterns and transaction architectures, which have event-based semantics to describe large-scale transaction systems. Furthermore, the transaction architecture is introduced as a unified medium for specifying and verifying distributed, heterogeneous and complex E-Commerce transaction processes. It is also illustrated as a powerful modeling technique which is easy-to-use, flexible and promotes reusability. [ABSTRACT FROM AUTHOR]

Published
2005

3. PERFORMANCE ANALYSIS OF A PARALLEL FFT ALGORITHM ON A TRANSPUTER NETWORK

Author

Symons, Anthony, Narasimhan, V. Lakshmi, and Sterzl, Kurt

Abstract

Fast Fourier Transforms (FFTs) are frequently employed in various applications such as image processing and speech recognition. Though FFT calculations can be speeded up considerably, real time processing requirements are well above that of modern day uniprocessor systems. Computing power can be substantially increased through the exploitation of the inherent parallelism available in FFT calculations. However, experimental performance analysis of the Parallel FFT (PFFT) algorithm has not been sufficiently investigated in a loosely coupled multiprocessor environment. In this paper, we evaluate the implementation of a PFFT on a network of T800 series transputers connected in the form of a linear pipeline and a binary cube. We analyse the speedup obtained, taking into account both computation load and communication overhead. A new load balancing algorithm has been incorporated so that load balancing takes into account both computation and communication loads. Realistic performance figures obtained through actual measurements on the system are compared with figures obtained from an analysis of the practical complexity of the implementation.

Published
1994
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