Aikaterini Varsou *01
IPVALUE Management Inc.
35 Sussex Ln
East Windsor, NJ 08520, USA
Ph.D: Electrical Engineering, 2001
Thesis: Rate Scheduling Techniques and Quality of Service Guarantees for Heterogeneous Networks
Advisor: Vincent Poor
35 Sussex Lane, East Windsor, NJ 08520,
(609) 448 0105, Fax: (609) 448 3506.
[1998-2001] Department of Electrical Engineering, Princeton University, Princeton, NJ. Gordon Wu Fellow.
Ph.D. in Electrical Engineering, February 2001.
Dissertation title: “Rate Scheduling Techniques and Quality of Service Guarantees for Heterogeneous Networks”.
Academic Advisor: Prof. H. Vincent Poor.
[1996-1998] Department of Electrical Engineering, Princeton University, Princeton, NJ.
M.A. (equivalent to Master's of Engineering) in Electrical Engineering.
M.A. topic: "Power Management in Mobile Communications Systems".
Academic Advisor: Prof. H. Vincent Poor.
Major: Information Sciences and Systems.
Minors: Mathematics, Systems and Control.
 Department of Electrical and Computer Engineering, Division of Computer Science, National Technical University of Athens, Greece.
M.S. in Computer Science.
Thesis title: "Suppression of the Exponential Complexity of the Multi-destination Dynamic Routing Problem by an Optimal Polynomial Algorithm."
Academic Advisors: Prof. E.N. Protonotarios, G.I. Stassinopoulos.
[1991-1995] Department of Electrical and Computer Engineering, National Technical University of Athens, Greece.
B.S. in Electrical Engineering.
JOB & RESEARCH EXPERIENCE
[09/05 till now] Member of Technical Staff, IPValue Management, Inc. Working on commercializing intellectual property for Xerox partner. Responsible for Web and Ecommerce program.
[03/01 - 09/05] Research Staff Member, NEC Laboratories America, Inc., Broadband and Mobile Networking Group (formerly IP&Optical Networking Group), Princeton, NJ.
[08/05 –09/05] Presence Information
Presence information and its subset of Instant Messaging are an emerging technology area. Presence denotes the availability and willingness of a user (presentity) for communication. The user’s information is published to certain subscribers (watchers). The main protocol proposed is SIMPLE, an extension to SIP, while there is also open source XML-based protocol, maintained by Jabber. My work initially consisted of a literature search on presence applications and papers as well as a market analysis of the different products available, comparison of the several protocols and their features. Then certain architectural problems were addressed in an effort to favor distributed or centralized systems. Context-awareness was introduced and researched in an effort to simplify things. My main task is to address privacy filtering in a presence context through use of specially modified in-house technology.
[04/05 –09/05] RFID
Radio Frequency Identification, its application, standardization, and innovation are constantly changing. Its adoption is still relatively new and hence there are many features of the technology that are not well understood. Developments in RFID technology continue to yield larger memory capacities, wider reading ranges, and faster processing. It is believed that it is highly unlikely that the technology will ultimately replace the bar codes, since even with the inevitable reduction in raw materials coupled with economies of scale, the integrated circuit in an RF tag will never be as cost-effective as a bar code label. However, RFID will continue to grow in its established niches where bar code or other optical technologies aren't effective. If some standards commonality is achieved, whereby RFID equipment from different manufacturers can be used interchangeably, the market will very likely grow exponentially. In the new fiscal year I started researching RFID. After conducting a survey on the literature and a market and competitor analysis, I identified specific problems to work on based on the major “bottleneck” categories: security, collisions, blocking, yoking proofs, as well as using stream processing and complex event processing to attack RFID issues. This is a brand new project and ongoing research.
 Meta Data Syndication for Grid/Web
The Meta Data Syndication (MDS) project is a multi-year project in NEC Labs to research on fundamental issues pertaining to data syndication and distribution, using the proliferating messaging paradigm of publish and subscribe (pubsub) systems. These areas include, among others, distributed routing algorithms, high performance content matching/filtering/processing, reliable messaging, ordered delivery, robustness and scalability, security, business models with regards to accounting, etc. The MDS project aims to provide a unified system for large amount internet scale applications such as RSS feed distribution, Network Monitoring, etc, which can be extended to support monitoring, surveillance and control applications, resource brokering, edge-based admission control, etc. MDS is based on an asynchronous messaging based pubsub system that allows communication between entities through exchange of messages while knowing each other in advance. This property allows building a Service Oriented Architecture (SOA) for many Internet-scale applications. It also allows optimization in the areas of routing, caching, network load balancing, content matching/filtering, security, etc. for such applications. MDS will investigate topic and content based pubsub systems and their applications. MDS chooses XML as its wire format and supports SOAP overlay or native TCP/IP overlay as its networking primitives. I got involved with this new and continuing project and had several accomplishments: from identifying potential RSS/MDS issues, to designing a portal and a website for the syndication project to finally simulating in ns2 our proposed solutions. Several technical reports were written and publications are currently being prepared.
[2003 till now] Grid Networking (content distribution for broadband and wireless)
The Grid networking philosophy targets viewing and utilizing network, computing and storage resources as a single virtualized system by discovering, monitoring and opportunistically harvesting available resources. Grid networking is being developed as a mechanism for several types of applications: data storage and replication, software distribution, rich data or content distribution and managed data delivery. As part of the Grid Networking team, I investigated existing schemes and solutions and extended the project by providing innovative algorithms for the provisioned case. I built a simulation platform to model realistic networks and measure the performance and optimization of the new algorithms based on multiple metrics and wrote up supporting documentation, manuals and technical reports presenting the results. I conducted a competitors comparison, investigated existing patents and technologies as well as market forecasts. I advanced the Grid project by proposing an application to storage networks, which I pursued through analysis and simulations. Relevant publications are currently being prepared for submission. This is a patent pending project, on which I worked in 2003 and which still continues as more relevant issues arise and as it gets integrated with the Web services and MDS topics. For details, please check the publications section.
 Hierarchical Optical Networks
My work focused on routing algorithms and issues for the NEC Labs HOXi project. I extended the project by considering "hot" topics such as protection for the optical networks and creation of an equivalent virtual topology. I also developed a software tool simulating a HOXi network to visualize the algorithmic performance. I created a parser that interacted with the core code and provided all the supporting documentation and reports. For details on this project, please check the relevant publications in the appropriate section.
 High Speed Routers
My work focused on new packet forwarding techniques and their comparison to the existing ones. I performed an exhaustive literature search and gave an internal seminar on different approaches for the problem.
[Sum. 1999] Member of Technical Staff, Lucent Technologies, Bell Labs Innovations, Holmdel, NJ.
Rate Scheduling for CDMA Wireless Communications Systems.
My work included identifying and solving one of the problems in the area of rate scheduling for CDMA networks. I came up with an algorithm which was simulated and analyzed. For details, please refer to the relevant publication.
[Sum. 1998] Member of Technical Staff, Lucent Technologies, Bell Labs Innovations, Whippany, NJ.
Power Analysis from Field Data in Mobile Communications Systems.
My work consisted of analyzing the collected field data and concluding on power issues.
[1997-1998] Research Assistant, Princeton University, Princeton, NJ.
Power Management in Mobile Communications Systems.
[Fall 1997, 1998] Teaching Assistant, Princeton University, Princeton, NJ.
Signal Analysis and Communications Systems.
[Sum. 1995] Programmer - Design Engineer, SIEMENS, Vienna, Austria.
Safety Interlocking Units for the Austrian Federal Railway.
[Fall 1994] Programmer -Analyst, National Technical University of Athens, Greece.
[Sum. 1994] Programmer, National Technical University of Athens, Greece.
Programming Languages and Unix Operating System.
Also participated in projects on the following areas during 1991-1996:
-Digital image processing and intra-frame prediction of moving images, Matlab.
-Fuzzy logic design of a wheel-Anti Blocking System for automobiles.
-Programming in Assembly 8085, 8088.
-Computerization of a hypothetical company, using INGRES and embedded SQL in C.
-Simulation and performance measurement of a computer system, TURBO C.
-Computerization of a hypothetical secretariat, COBOL.
1. "Grid Networking: Accelerated Large Data Distribution in Overlay Networks", co-inventors: Rauf Izmailov, Samrat Ganguly and Nan Tu, provisional application and patent application filed in 2003, published patent number 20050015511.
B. Journals and Conference Proceedings
1. Aikaterini C. Varsou, Rauf Izmailov, Samrat Ganguly, Sudeept Bhatnagar and Akhilesh Saxena, "Overlay Network Design for Data Replication", submitted to IEEE ICC 2006, Istanbul, Turkey.
2. Aikaterini C. Varsou, Nan Tu and Rauf Izmailov, "Overlay Network Design for a Given Traffic Matrix", submitted to IEEE ICC 2006, Istanbul, Turkey.
3. Samrat Ganguly, Aikaterini C. Varsou and Rauf Izmailov, "Waveband routing on logical topologies constructed over a ring network", IEEE High Performance Switching and Routing 2004, pp. 126-133, Phoenix, Arizona.
4. Aikaterini C. Varsou, Samrat Ganguly and Rauf Izmailov, "Waveband Protection Mechanisms in Hierarchical Optical Networks", IEEE High Performance Switching and Routing 2003, pp. 317-322, Torino, Italy.
5. Rauf Izmailov, Samrat Ganguly, Viktor Kleptsyn and Aikaterini C. Varsou, "Non-Uniform Waveband Hierarchy in Hybrid Optical Networks", IEEE INFOCOM 2003, Vol.2, pp.1344-1354, San Francisco, CA, April 2003.
6. Aikaterini C. Varsou, H. Vincent Poor, "Scheduling Algorithms for Downlink Rate Allocation in Heterogeneous CDMA Networks", Journal of Communications and Networks, Vol.4, No. 3, pp. 199-208, Sept. 2002.
7. Aikaterini C. Varsou, H. Vincent Poor, "An Adaptive Rate Processor Sharing Technique", Proceedings of IEEE Vehicular Technology Conference Fall 2001, Atlantic City, NJ, Oct 7-11, 2001.
8. Aikaterini C. Varsou, H. Vincent Poor, "A Time Varying Approach for Delay Service Guarantees", 11th INFORMS Applied Probability Conference 2001, New York, NY, July 25-27, 2001.
9. Aikaterini C. Varsou, H. Vincent Poor, "Waiting Time Analysis for the Generalized PEDF and HOLPRO Algorithms in a System with Heterogeneous Traffic", Proceedings of IEEE Vehicular Technology Conference 2001, Rhodes Island, Greece, May 6-9, 2001.
10. Aikaterini C. Varsou, H. Vincent Poor, "Delay analysis for Powered Earliest Deadline First (PEDF) and Head of Line Pseudoprobability Assignment (HOLPRO)", Proc. CISS 2001, John Hopkins University, Baltimore, Maryland, March 21-23, 2001.
11. Aikaterini C. Varsou, Howard C. Huang, Laurence Mailaender, "Rate Scheduling for CDMA Downlink Mixed Traffic Networks", Proceedings of IEEE WCNC 2000, Chicago, IL, Sept. 23-27, 2000.
12. Aikaterini C. Varsou, H. Vincent Poor, "HOLPRO: A New Downlink Rate Scheduling Algorithm for CDMA Networks", Proceedings of IEEE Vehicular Technology Conference 2000, Boston, MA, Sept. 24-28, 2000.
C. Technical Reports
1. Aikaterini C. Varsou and Hui Zhang, "On presence information”, Technical Report, NEC Laboratories America, TR 2005-L137.
2. Aikaterini C. Varsou, "Proposed problems for RFID", Technical Report, NEC Laboratories America, TR 2005-L003N.
3. Aikaterini C. Varsou, "A summary of some RSS-related issues", Technical Report, NEC Laboratories America, TR 2005-L074.
4. Aikaterini C. Varsou, "An introduction to RFID--related issues", Technical Report, NEC Laboratories America, TR 2005-L075.
5. Aikaterini C. Varsou, "A Frontpage and ASP-based template for the MDS project", Technical Report, NEC Laboratories America, TR2005-L061.
6. Aikaterini C. Varsou, "NS-2 comparison of MDS and RSS-based systems", Technical Report, NEC Laboratories America, TR2005-L062.
7. Rauf Izmailov, Samrat Ganguly, Sudeept Bhatnagar, Akhilesh Saxena and Aikaterini C. Varsou, "Placement of Grid Networking Servers for Acceleration of Point-to-Point Replication Tasks in Wide Area Storage Networks ", Technical Report, NEC Laboratories America, TR2004-L083.
8. Aikaterini C. Varsou, Nan Tu, and Rauf Izmailov, "A Method of Network Design for a Given Traffic Matrix", Technical Report, NEC Laboratories America, TR2004-L038.
9. Nan Tu, Aikaterini C. Varsou and Rauf Izmailov, "A Performance Comparison of Routing Schemes for Data Replication in Storage Area Networks", Technical Report, NEC Laboratories America, TR2004-L037.
10. Rauf Izmailov, Samrat Ganguly, Nan Tu and Aikaterini C. Varsou, "Grid Networking: Data Distribution, Routing, Scheduling, Partitioning and Assembly in Overlay Networks", Technical Report, NEC Laboratories America, TR2003-L061.
11. Aikaterini C. Varsou, Samrat Ganguly, Nan Tu and Rauf Izmailov, " CEDARS Simulator User Guide", Technical Report, NEC Laboratories America, TR2003-L021.
12. Rauf Izmailov, Samrat Ganguly, Nan Tu and Aikaterini C. Varsou, " Grid Networking", provisional patent application, NEC Laboratories America, IR02017.
13. Samrat Ganguly, Aikaterini C. Varsou and Rauf Izmailov, "Logical Topology in Hierarchical Optical Networks", Technical Report, NEC Laboratories America, TR2002-L001.
14. Aikaterini C. Varsou, Samrat Ganguly, Nan Tu and Rauf Izmailov, "HOXiNeT User Guide: A Manual for the HOXiNeT Software Tool", Technical Report, NEC Laboratories America, TR2002-L003.
15. Aikaterini C. Varsou, Samrat Ganguly and Rauf Izmailov, "Waveband protection in hierarchical optical networks", Technical Report, NEC USA, CCRL, TR2002-C020-4-5483-1.
16. Aikaterini C. Varsou, "Selection and assignment algorithms for the multihub ring case in hierarchical optical networks", Technical Report, NEC USA, CCRL, TR2001-C089-4-5483-4.
17. Aikaterini C. Varsou, "Waveband assignment and selection for hierarchical optical networks with implementation restrictions", Technical Report, NEC USA, CCRL, TR2001-C088-4-5483-3.
18. Aikaterini C. Varsou, "A modified Bonsai algorithm for high speed routers", Technical Report, NEC USA, CCRL, TR2001-C072-4-5483-2.
19. Aikaterini C. Varsou, "Packet forwarding techniques for high speed routers", Technical Report, NEC USA, CCRL, TR2001-C060-4-5483-1.
20. Aikaterini C. Varsou, "Optimal cover cardinality bounds for hierarchical optical networks", Technical Report, NEC USA, CCRL, TR2001-C007-4-5483-1N.
D. Ready for submission
1. Rauf Izmailov, Samrat Ganguly, Nan Tu and Aikaterini C. Varsou, "Grid Networking: Accelerated Large Data Distribution in Overlay Networks", patent pending, after which submission will take place.
2. Aikaterini C. Varsou, H. Vincent Poor, "Delay Analysis and Stability Conditions for Downlink Rate Allocation Algorithms in Heterogeneous CDMA Networks".
3. Aikaterini C. Varsou, H. Vincent Poor, "Statistical and Time-varying Analysis for Networks with Delay Quality of Service Guarantees".
E. Under Preparation
1. Aikaterini C. Varsou, , Samrat Ganguly, Sudeept Bhatnagar and Rauf Izmailov, "Placement of Grid Networking Servers for Acceleration of Point-to-Point Replication Tasks in Wide Area Storage Networks”, under preparation.
2. Aikaterini C. Varsou, "NS-2 comparison of MDS and RSS-based systems", under preparation.
3. Aikaterini C. Varsou, H. Vincent Poor, "Statistical Latency-Rate Servers", under preparation.
4. Aikaterini C. Varsou, M.G. Kazantzakis and G.I. Stassinopoulos, "A Minimal Cut Based Polynomial Solution for the Multi-destination Optimal Dynamic Routing Problem", under preparation.
RELEVANT GRADUATE COURSES
 Probability Theory (Erhan Cinlar).
 Algebra (J. deJong).
 Real Analysis (J. deJong).
 Complex Analysis (R.C. Gunning).
 Random Processes in Info. Systems (S. Verdú).
 InformationTheory (Sergio Verdú).
 Multiuser Communications Theory (Sergio Verdú).
 Theory of Detection and Estimation (Vincent Poor).
 Communication Networks (Hisashi Kobayashi).
 Linear System Theory (B. Dickinson).
 Stochastic Calculus (R. Carmona)(AUD).
 Special topics in Info.Sciences & Systems (Steve Weinstein)(AUD).
 Coding Theory (Ruediger Urbanke)(AUD).
 Wireless Comm.-Sign.Processing Principles (V. Poor)(AUD).
 Biography was featured in Marquis' Who is Who of Emerging Leaders, 1st Edition for 2007-2008.
 Biography was featured in Marquis' Who is Who in Finance and Business, 35th Edition for 2006-2007.
(  Biography was considered for Marquis' Who is Who in the World, 23rd Edition for 2006, November 2005.)
( Biography was considered for Marquis' Who is Who of American Women, 25th Silver Anniversary Edition for 2006-2007, November 2005.)
( Biography was considered for Marquis' Who is Who in America, 60th Diamond Edition for 2006, October 2005.)
 Biography was featured in Marquis' Who is Who in Science and Engineering, 8th Edition, November 2004.
[2003 till now] Member of Princeton University’s Alumni School Committee, interviewing and deciding on admitting potential undergraduate students.
 Princeton University Strategic Planning Workshop, "The Next Generation: Redefining Excellence in Graduate Education" (special invitation by the Dean of Engineering and Applied Science) - strategically planning and redefining the future of graduate studies at the university.
 Member of the Priorities Committee of the Council of the Princeton University Community (CPUC), reviewing and preparing the budget for fiscal year 2000.
 Member of the Resources Committee of CPUC, considering questions of general policy concerning the procurement and management of the University's financial resources.
 Member of the Judicial Committee of CPUC, hearing and deciding on case that involve alleged violations of the university established rules and regulations.
[96-00] Gordon Wu Fellow for the years 1996-2000, Princeton University.
Check out http://www.princeton.edu/~seasweb/ginfo/wu/index.html about these prestigious fellowships.
 DaDiSP grant, Spring 1998.
 Accepted for graduate studies in Electrical Engineering - Telecommunications with fellowships/assistantships offered by the following Universities: Stanford University, Massachusetts Institute of Technology, Princeton University, Cornell University, Purdue University, University of Southern California, Columbia University, University of Massachusetts at Amherst, Boston University, George Washington University, Drexel University.
 "Thomaidios" Fellowship, for graduating first in the Electrical and Computer Engineering Dept. during the 1995-1996 year.
[94-96] Technical Chamber of Greece (TEE) Fellowship for graduating first among ALL Departments of the National Technical University of Athens (N.T.U.A.) during the 1995-1996 academic year and two more fellowships for excellent academic performance in the Dept. of Electrical and Computer Engineering, N.T.U.A, during the 1994-1995 and 1995-1996 academic years.
[91-95] Four fellowships, National Fellowships Foundation (IKY), for excellent academic performance for each year in N.T.U.A.
"I. Kollias" Fellowship in Data Bases, for excellent academic performance in the corresponding course, during the 1994-1995 year and "Kary" Fellowships for excellent academic performance during the 1993-1994, 1994-1995, 1995-1996 years are still pending!!
 Member of the Hellenic Team, representing Greece at Balkan and International Olympiads in Mathematics during 1988-1990.
 Honorary award, 31st International Mathematics Olympiad (Beijing, China), 1990.
 Participation in the Balkan School (Cyprus), 1990.
 Second Prize, silver medal and honorary silver cup, National Mathematics Olympiad, Hellenic Mathematics Society, 1988-1989 (no gold was awarded).
[88,91] Two Third Prizes and bronze medals, National Mathematics Olympiad, Hellenic Mathematics Society, 1987-1988, 1990-1991.
[89-91] Two First Prizes, one third prize and one first award, National Competition of Mathematics, Hellenic Mathematics Society, 1988-1989, 1989-1990, 1990-1991.
[85-91] Twelve honorary awards from the Greek Ministry of Education and six honorary awards from the Office of the Mayor of Athens, for excellent academic performance in High School and Senior High School.
 First prize, National Contest in Essay Writing, Hellenic Red Cross, 1991.
 YAMAHA Music Foundation diploma (Paris): diplome grade 6, step 8, 1991.
Leadership: able to take initiative and motivate a project team.
Learning ability: quick learner; fascinated by new and promising areas.
Communication: comfortable and effective communicating with both superiors and staff; communicate well with different personality types.
Investigation/Search Skills: efficient resources search on current technology for elaborate market and competitor reports.
Responsibility: self-motivated, accustomed to setting goals and working hard to achieve them.
Organization: effective and efficient use of time and resources.
Computer expertise: Strong programming in C. Expertise with several other programming languages, including C++ and SQL. LINUX, UNIX and Windows Operating Systems, Microsoft Office, experience with scripting languages and Matlab.
TEACHING /SUPERVISING EXPERIENCE
[1991-now] Almost fifteen years of technical experience. More than twelve years of research experience.
[2001-now] NEC Labs America: supervising, training and collaborating with Master's employees and interns.
[September 2000] Princeton University Workshop: training incoming graduate students on teaching engineering courses and labs.
[1997,1998] Teaching Assistant, Princeton University.
ELE 485: Signal Analysis and Communication Systems (Graduate and senior undergraduate course).
[Fall 1992,1993] Teaching Assistant, N.T.U.A.
Introduction to Programming (undergraduate course).
[Spring 1992,1993] Teaching Assistant, N.T.U.A.
Programming Techniques (undergraduate course).
[1992-1993] Assisted in writing the course books for "Introduction to Programming" (1st semester) and "Programming Techniques" (2nd semester) of the ECE Dept. in NTUA.
PROFESSIONAL ACTIVITIES AND MEMBERSHIPS
Technical Program Committee Member in DSPN 2004 Workshop, "Data Processing and Storage Networking: towards Grid Computing", May 2004.
Organizer for the "QoS in wireless" session of IEEE WCNC 2002, Orlando, Florida.
Chaired two sessions in IEEE Vehicular Technology Conference 2001, Atlantic City, NJ.
Constantly reviewing high quality papers for IEEE Transactions on Signal Processing, IEEE Transactions on Aerospace and Electronic Systems, IEEE Communication Letters, IEEE/ACM Transactions on Networking, Journal of Communications and Networks, IEEE International Symposium on Information Theory (ISIT), IEEE Global Communications Conference (GLOBECOM), IEEE INFOCOM Computer and Communications Conference, IEEE International Symposium on Spread Spectrum Techniques and Applications (ISSSTA), IEEE Wireless Communications and Networking Conference (WCNC).
Technical assistant in organizing the Conference on Information Sciences and Systems (CISS) in Princeton, NJ, 2000.
IEEE member of Communications, Signal Processing, Information Theory Societies.
IEEE Senior Member.
Member of ACM.
Member of the Technical Chamber of Greece, since 1996.
Greek (mother tongue).
French (SORBONNE I and SUPERIEUR III, Université de Paris).
Spanish (Princeton University courses, 2000).
 Teaching permit for English and French (licensed by the Hellenic Ministry of Education).
Learning new things, especially what has to do with Mathematics, accounting, finance etc. Self-taught the basics of quantitative finance.
Music (Yamaha Electone), dancing, swimming, roller-skating.
AIKIDO (a kind of martial art).
Bicycling (diploma for participation in the bicycling tour of Athens, 1992, 1993, 1994).
Photographing, chess playing, stamp collecting.
Ecology (diploma for participation in reforestation during the "Environment month 1993").
Female, citizen of Greece, permanent resident of the United States, married with three sons.