Table of Contents International Journal of Sociotechnology and Knowledge Development Volume 12 • Issue 1 • January-March-2020 • ISSN: 1941-6253 • eISSN: 1941-6261 Guest Editorial Preface iv Special Issue on Advanced Applications in Computer Science and Information Systems: Part 1; Ahmad Taher Azar, Prince Sultan University, Riyadh, Saudi Arabia & Faculty of Computers and Artificial Intelligence, Benha University, Banha, Egypt Research Articles 1 Copy-Move Forgery Detection Based on Automatic Threshold Estimation; Aya Hegazi, Faculty of Computers and Informatics, Benha University, Benha, Egypt Ahmed Taha, Faculty of Computers and Informatics, Benha University, Benha, Egypt Mazen Mohamed Selim, Faculty of Computers and Informatics, Benha University, Benha, Egypt 24 A Robust and Blind 3D Mesh Watermarking Approach Based on Particle Swarm Optimization; Mourad R. Mouhamed, Helwan University, Cairo, Egypt & Scientific Research Group in Egypt (SRGE), Cairo, Egypt Mona Mohamed Soliman, Cairo University, Cairo, Egypt Ashraf Darwish, Helwan University, Cairo, Egypt Aboul Ella Hassanien, Cairo University, Cairo, Egypt 49 Automatic Gun Detection Approach for Video Surveillance; Mai Kamal el den Mohamed, Faculty of Computer and Informatics, Cairo, Egypt Ahmed Taha, Faculty of Computer and Informatics, Cairo, Egypt Hala H. Zayed, Faculty of Computer and Informatics, Cairo, Egypt 67 Fusion Time Reduction of a Feature Level Based Multimodal Biometric Authentication System; Rasha O. Mahmoud, Department of Computer Science, Faculty of Computers and Informatics, Benha University, Benha, Egypt Mazen M. Selim, Benha University, Benha, Egypt Omar A. Muhi, Department of Computer Science, Faculty of Computers and Informatics, Benha University, Benha, Egypt 84 A Framework for Managing Big Data in Enterprise Organizations; Youssef Ahmed, Faculty of Computers and Artificial Intelligence, Benha Univ/ITCS, Egypt Walaa Medhat, Faculty of Computers and Artificial Intelligence, Benha Univ/ITCS, Egypt Tarek El Shishtawi, Faculty of Computers and Artificial Intelligence, Benha Univ/ITCS, Egypt 98 A Proposed Frequent Itemset Discovery Algorithm Based on Item Weights and Uncertainty; Hanaa Ibrahim Abu Zahra, Information Systems Department, Faculty of Computers and Informatics, Benha University, Benha, Egypt Shaker El-Sappagh, Information Systems Department, Faculty of Computers and Informatics, Benha University, Benha, Egypt Tarek Ahmef El Shishtawy, Information Systems Department, Faculty of Computers and Informatics, Benha University, Benha, Egypt CoPyRiGht The International Journal of Sociotechnology and Knowledge Development (IJSKD) (ISSN 1941-6253; eISSN 1941-6261), Copyright © 2020 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 Sociotechnology and Knowledge Development is indexed or listed in the following: Bacon’s Media Directory; Cabell’s Directories; DBLP; GetCited; Google Scholar; INSPEC; JournalTOCs; MediaFinder; SCOPUS; The Index of Information Systems Journals; The Standard Periodical Directory; Ulrich’s Periodicals Directory.