Table of Contents International Journal of Grid and High Performance Computing Volume 8 • Issue 4 • October-December-2016 • ISSN: 1938-0259 • eISSN: 1938-0267 An official publication of the Information Resources Management Association Research Articles 1 TVGuarder: A Trace-Enable Virtualization Protection Framework against Insider Threats for IaaS Environments; Li Lin, College of Computer Science, Faculty of Information Technology, Beijing University of Technology, Beijing, China Shuang Li, College of Computer Science, Faculty of Information Technology, Beijing University of Technology, Beijing, China Bo Li, State Key Laboratory of Software Development Environment, Beihang University, Beijing, China Jing Zhan, College of Computer Science, Faculty of Information Technology, Beijing University of Technology, Beijing, China Yong Zhao, College of Computer Science, Faculty of Information Technology, Beijing University of Technology, Beijing, China 21 Dynamic Job Scheduling Strategy for Unreliable Nodes in a Volunteer Desktop Grid; Shaik Naseera, Department of Computing Science and Engineering, VIT University, Vellore, India 34 Hilbert Index-based Outlier Detection Algorithm in Metric Space; Honglong Xu, Guangdong Province Key Laboratory of Popular High Performance Computers, Shenzhen University, Shenzhen, China Haiwu Rong, School of Mathematics and Big Data, Foshan University, Foshan, China Rui Mao, Guangdong Province Key Laboratory of Popular High Performance Computers, Shenzhen University, Shenzhen, China Guoliang Chen, Guangdong Province Key Laboratory of Popular High Performance Computers, Shenzhen University, Shenzhen, China Zhiguang Shan, State Information Center, Beijing, China 55 High Performance CGM-based Parallel Algorithms for the Optimal Binary Search Tree Problem; Vianney Kengne Tchendji, Department of Mathematics and Computer Science, University of Dschang, Dschang, Cameroon Jean Frederic Myoupo, University of Picardie Jules Verne, Amiens, France Gilles Dequen, University of Picardie Jules Verne, Amiens, France 78 A Two-Level Fuzzy Value-Based Replica Replacement Algorithm in Data Grids; Nazanin Saadat, Department of Computer Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran Amir Masoud Rahmani, Department of Computer Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran 100 MR-LDA: An Efficient Topic Model for Classification of Short Text in Big Social Data; Xiongwen Pang, School of Computer, South China Normal University, Guangzhou, China Benshuai Wan, Information Technological Department, Guangdong Nanhai Rural Commercial Bank Company Limited, Guangzhou, China Huifang Li, School of Computer, South China Normal University, Guangzhou, China Weiwei Lin, School of Computer Science and Engineering, South China University of Technology, Guangzhou, China CopyRight The International Journal of Grid and High Performance Computing (IJGHPC) (ISSN 1938-0259; eISSN 1938-0267), Copyright © 2016 IGI Global. All rights, including translation into other languages reserved by the publisher. No part of this journal may be reproduced or used in any form or by any means without written permission from the publisher, except for noncommercial, educational use including classroom teaching purposes. Product or company names used in this journal are for identification purposes only. Inclusion of the names of the products or companies does not indicate a claim of ownership by IGI Global of the trademark or registered trademark. The views expressed in this journal are those of the authors but not necessarily of IGI Global. The International Journal of Grid and High Performance Computing is indexed or listed in the following: ACM Digital Library; Bacon’s Media Directory; Cabell’s Directories; Compendex (Elsevier Engineering Index); DBLP; GetCited; Google Scholar; INSPEC; JournalTOCs; MediaFinder; SCOPUS; The Standard Periodical Directory; Ulrich’s Periodicals Directory; Web of Science Emerging Sources Citation Index (ESCI).