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Graceful Labeling of Some Classes of Diameter Six
and Diameter Seven Trees
-- Debdas Mishra and Pratima Panigrahi
This paper gives a graceful labeling to some new classes of diameter six and diameter seven trees
using the concept of joining isomorphic copies of a tree (Koh and Tan, 1979; and Chen Wen-Chin et al., 1997).
Graceful Labeling of Some Classes of Diameter Six and Diameter Seven Trees
Debdas Mishra and Pratima Panigrahi This paper gives a graceful labeling to some new classes of diameter six and diameter seven trees using the concept of joining isomorphic copies of a tree (Koh and Tan, 1979; and Chen Wen-Chin et al., 1997).
© 2008 IUP . All Rights Reserved.
Reconstruction of Phylogenetic Tree of Some Selected Housekeeping Proteins Using Distance Based Methods
-- Veeky Baths, M Arvind, Uday Kiran and Utpal Roy
Understanding the historical relationship between living organisms has been one of the principal goals of evolutionary research. Phylogeny, i.e., the evolutionary history of a set of organisms, plays a major role in representing and understanding the relationship among various organisms. A phylogenetic tree reconstruction method was developed that detects and reports multiple, topologically distant set of proteins from diverse organisms chosen for the present study. The method is a generalization of the Neighbor-Joining (NJ) method of Nei and Saitou, and affords a more thorough sampling of the solution space by keeping track of multiple partial solutions during its execution. The tree was constructed based on the NJ plot. This report deals a brief account of the various algorithms such as Needleman-Wunsch and distance based methods such as NJ algorithms that have been used to analyze various protein sequences, which perform multiple sequence alignment and construct phylogenetic trees to derive their evolutionary relationship. In the present study, 14 different species starting from fission yeast and nematode to the highest order of chimpanzee and humans were analyzed with as many as eight housekeeping proteins including the tumor suppressor proteins. The results show net divergence of each species from other species. The major findings reveal that humans and chimpanzee are closely related in the proteins like dicer1 and p53, while most other proteins indicate that mouse, chick and humans are closely related in terms of evolution.
© 2008 IUP . All Rights Reserved.
Load-Flow Analysis of Radial Distribution Networks
-- S Ghosh
This paper presents a simple method to solve the load-flow problem of radial distribution networks. This algorithm easily computes the branch currents, reduces the complexity in computation, exploits the graphical feature of the radial distribution networks and reduces the data preparation. The proposed method is compared with the other methods available in literature to demonstrate its effectiveness with the help of two examples33-node and 69-node radial distribution networks.
© 2008 IUP . All Rights Reserved.
Minimization of Keane's Bump Function by the Repulsive Particle Swarm and the Differential Evolution Methods
-- S K Mishra
Keane's bump function is considered as a standard benchmark for nonlinear constrained optimization. It is highly multimodal (nonconvex) and its optimum is located at the nonlinear constrained boundary. The paper optimizes Keane's function of different dimensions by the Repulsive Particle Swarm (RPS) and the Differential Evolution (DE) methods of global optimization. The RPS is endowed with intensive local search ability and DE uses the most recent formulation of crossover scheme. It is found that these methods, the DE in particular, are the most effective optimizers.
© 2008 IUP . All Rights Reserved.
Application of Homotopy Perturbation Method for Two Coupled Scalar Fields
-- H Jafari, J Sadeghi, M Zabihi and A R Amani
This paper, uses the Homotopy Perturbation Method (HPM) to obtain the soliton solution for two coupled scalar fields. Finally, the fields are plotted in terms of coordinates x and the kink and lump solutions are obtained.
©2008 IUP . All Rights Reserved.
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December'08
