PhD in Computer Science Faculty

Bio-sketches of the key faculty members who lead and support our Ph.D. in Computer Science program:

Dr. Lixin Tao, Professor of Computer Science, Chairperson of Computer Science Department Westchester, Director of Ph.D. in Computer Science Program

Dr. Tao received his Ph.D. in Computer Science from the University of Pennsylvania in 1988. Before he joined Pace University in 2001, he was associate professor of computer science with Concordia University in Montreal for 8 years. Dr. Tao is an IEEE senior member, and an ABET national program evaluator for computer science. He has published over 150 papers in refereed international journals and conference proceedings in areas of Internet and web computing, cloud and utility computing, XML and web services, operations research and combinatorial optimization, parallel and distributed computing, functional simulation, and computing education.

Dr. Tao has a track record for quality sponsored research. During 1992-1995, Dr. Tao was PI for the Environment for Portable Parallel Programming project sponsored by Strategic Technology Program of Industry, Science and Technology Canada, Digital, and IBM, with a budget of $4.2 million per year. From 1997 to 2005, Dr. Tao consulted for MITRE Corporation (, federal funded IT research centers on defense, aviation, IRS, homeland security and U.S. courts); Bell Atlantic (now Verizon) in Atlanta; and Fleet Boston (now Bank of America) on CORBA (distributed objects) technology and Application-Service-Provider model of computing (predecessor of today’s utility computing and cloud computing). From 2005 to 2006, as an international pioneer on cloud computing, Dr. Tao consulted for USAA ( on the use of cloud technology to deliver financial services to soldiers on aircraft carriers and in foreign territories. Dr. Tao has graduated 5 Ph.D. students, 9 DPS doctorate students, and supervised dozens of master theses.

Dr. D. Paul Benjamin, Professor of Computer Science

Dr. Benjamin earned his doctorate in computer science from New York University in 1985. He worked for six years in industry before entering academia. Currently, he is professor of computer science and founder and director of the Robotics Lab at Pace University in New York City.

His research focuses on issues of problem solving and representation in cognitive architectures. He and two collaborators from Fordham University and Brigham Young University have been developing a robotic cognitive architecture over the past ten years. In addition, he and his research group at the Pace Robotics Lab have been building cognitive agents in cyber-security.

Dr. Benjamin’s research has been supported by over $2.5 million in research grants from federal agencies including the NSF, DARPA, AFOSR, ARO, and the Dept. of Energy.

Dr. Sung-Hyuk Cha, Professor of Computer Science

Dr. Sung-Hyuk. Cha received his Ph.D. in Computer Science from the State University of New York at Buffalo in 2001 and is a member of Phi Beta Kappa. He graduated with High Honors and received High Honors in Computer Science. From 1996 to 1998, he was working in the area of medical information systems such as PACS, teleradiology, and telemedicine at Information Technology R&D Center, Samsung SDS. During his Ph.D. years, he was affiliated with the Center of Excellence for Document Analysis and Recognition (CEDAR). Major contribution made at CEDAR includes dichotomy model to establish the individuality of handwriting, distance measures on histograms and strings, a nearest neighbor search algorithm, apriori algorithm, etc. supervised by Prof. Sargur N. Srihari. The individuality of handwriting project which was funded by National Institute of Justice Research Award: (1999-IJ-CX-K010, $428,000) led to the United States patent (7580551 B1) in 2009. He has been a faculty member of Computer Science department at Pace University since 2001 and has been advising over ten doctorate and ten M.S. dissertations. He served as a chair panel speaker, plenary speaker, or committee member on many conferences, and invited speakers for numerous seminars. Since 2009, he became an Industrial Advisory Board Member for the NSF Scholarship Program in Pharmaceutical Statistics. His main interests include computer vision, data mining, and pattern matching & recognition. He is a member of AAAI, and IEEE and its Computer Society. He has over one hundred publications in highly rated ISI journals and conference proceedings with an h-index of 19 with over 1570 citations.

Dr. Li-Chiou Chen, Associate Professor of Information Technology, Chairperson of Information Technology Department Westchester

Dr. Li-Chiou Chen has a Ph.D. in Engineering and Public Policy from Carnegie Mellon University (CMU) and was affiliated with the Center for Computational Analysis of Social and Organizational Systems (CASOS).  While at CMU, she built a computational simulation tool to investigate policy decisions in countering distributed denial-of-service attacks. In addition, she participated in a DARPA-funded research project, BioWar, where she analyzed policy decisions to respond against the spread of biological agents.  Her current research has been focused on the impact of policy and managerial decisions on countering computer attacks on the Internet. Specific topics include web application vulnerability testing, security usability and security regulatory compliance. She has published papers in top academic journals, including Computer & Security, Decision Support Systems and IEEE Transactions. She supervises doctoral students for their dissertation research. Her students have been working on cyber security related topics including: domain name systems security, authorship authentication, corporate security policy compliance, and computer security risk perception.

Dr. Chen has extensive grant management experiences. She is a principle investigator (PI) on three National Science Foundation grants, a Co-PI on one Department of Defense grant, and a PI on three Thinkfinity grants supported by the Verizon Foundation. She currently serves as the program director of the Scholarship for Service (SFS) program in Pace University supported by the National Science Foundation. The SFS program trains Pace students to become Information Assurance professionals who are obligated to enter the federal workforce upon graduation. She is also an advisor to students in Pace’s Information Assurance Scholarship Program, a similar cyber security scholarship program supported by the Department of Defense. Dr. Chen has taught numerous courses on the theory and practice of computer security and developed hands-on computer security laboratory teaching modules.

Dr. Meikang Qiu, Associate Professor of Computer Science

Dr. Qiu received his Ph.D. in Computer Science from the University of Texas at Dallas in 2007. Before he joined Pace University, he was a faculty member of computer engineering at University of Kentucky and San Jose State University. Dr. Qiu is both IEEE senior member and ACM Senior member. His research areas include: Cloud Computing, Cyber Security, Big Data, Telehealth, Embedded System, Mobile System, Combinatorial Optimization, Heterogeneous Computing, and High Performance Computing.

Dr. Qiu has published 4 books, 200+ peer-reviewed journal and conference papers (including 100+ journal articles, 100+ conference papers), and 3 patents. He has won ACM Transactions on Design Automation of Electrical Systems 2011 Best Paper Award. His paper about cloud computing has been published in JPDC (Journal of Parallel and Distributed Computing, Elsevier) and ranked #1 in 2012 Top 25 Hottest Papers. He has won another 4 Conference Best Paper Awards (IEEE/ACM ICESS’12, IEEE GreenCom’10, IEEE EUC’10, IEEE CSE’09) in recent years.

Dr. Qiu is an Associate Editor of IEEE Transactions on Computer and IEEE Transactions on Cloud Computing. He is the Guest editor for IEEE Transactions on Cloud Computing, Special Issue on Cyber Security and Privacy Protection, 2014. He is the General Chair of IEEE HPCC/ICESS/CSS 2015, General Chair of NSS’15 (Network and System Security), Steering Committee Chair of IEEE BigDataSecurity 2015, and Program Chair of IEEE SOSE’15.

Dr. Qiu has won Navy Summer Faculty Award in 2012 and Air Force Summer Faculty Award in 2009. He has received NSF CNS-1457506, NSF-1359557, and NSF-1249223, Towards Low-Latency Low-Power Heterogeneous Memory Access, $100,000, 08/15/12 - 07/31/16 as a single PI. His research is also supported by industrial such as Nokia, TCL, and Cavium.

Dr. Bel G. Raggad, Professor of Information Technology

Dr. Bel G. Raggad is a Professor of Information Technology. He obtained his Ph.D. from Pennsylvania State University in 1989. His dissertation was supervised by Kalyan Chatterjee, a student of Howard Raiffa, a Frank P. Ramsey Professor of Managerial Economics, a joint chair held by the Business School and the Kennedy School of Government at Harvard University and the eminent pioneer in the field of decision analysis. His Ph.D. dissertation was also co-chaired by Gary Lilen, one among top scholarly researchers in Management Science.

Dr. Raggad’s MS thesis in Computer Science was supervised by Farouk Kammoun, a student of Klein Rock, the UCLA scholar known as the father of the Internet.

His research interest is in Intelligent Decision Support and Information Security. He has written several books in the area of IA, including a recent textbook “Information Security Management: Concepts and Practice,” published by CRC Press. He has published a large number of articles in refereed journals, including the Journal of CIS, Managerial Decision, Journal of Management and Information Processing, Managerial Finance, Journal of Data and Industrial Systems, etc.

Dr Raggad has received several internal and external grants to conduct scholarly research. Dr. Raggad has supervised more than a dozen MS theses and several doctoral theses.

Dr. Namchul Shin, Professor of Information Technology

Namchul Shin is Professor of Information Systems. He received his Ph.D. in Management (specialization in MIS) from the University of California at Irvine in 1997. His current research interests focus on the areas of globalization of innovation and production networks, IT business value, organizational and strategic impacts of IT, and electronic commerce. His work has been published in journals such as Industry & Innovation, Decision Support Systems, European Journal of Information Systems, International Journal of Information Management, Electronic Commerce Research and Applications, Journal of Computer Information Systems, Journal of Electronic Commerce Research, and Journal of Information Technology Theory and Application, among other journals.

He is associate editor of Journal of Electronic Commerce Research (2001 to present) and a member of the editorial board of Business Process Management Journal (2001 to present). He has also worked as a reviewer for thirty-four journals and eleven different conferences for the past seventeen years. He is a faculty research associate at the Personal Computing Industry Center (PCIC) affiliated to the University of California at Irvine (2009 to present). He was also a faculty research associate at the Center for Research on Information Technology and Organizations (CRITO) affiliated to the University of California at Irvine (2009 to 2012).

He has advised several students for the Doctor of Professional Studies (DPS) Program at the Seidenberg School of Computer Science and Information Systems as a dissertation chair or a committee member.

Dr. Charles C. Tappert, Professor of Computer Science and Associate Program Chair, DPS in Computing

Dr. Charles C. Tappert has a PhD in Electrical Engineering from Cornell University. He has extensive experience in computer science, specializing in pattern recognition and machine learning, biometrics, handwriting recognition and pen computing, speech applications, information assurance, forensics, artificial intelligence, and project management. He teaches graduate courses in pattern recognition and machine learning, algorithms, big data analytics, emerging information technologies, capstone projects, and research methodologies. He has supervised over twenty doctoral dissertations and ten masters theses, and has secured external funding from government and industry. He has over 100 peer reviewed publications in prestigious international journals and conferences.