Moshe Y. Vardi
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Obituary: Amir Pnueli, 1941–2009 Krzysztof R. Apt and Lenore D. Zuck
Obituary: Amir Pnueli, 1941–2009 Krzysztof R. Apt and Lenore D. Zuck Amir Pnueli was born in Nahalal, Israel, on April 22, 1941 and passed away in New York City on November 2, 2009 as a result of a brain hemorrhage. Amir founded the computer science department in Tel-Aviv University in 1973. In 1981 he joined the department of mathematical sciences at the Weiz- mann Institute of Science, where he spent most of his career and where he held the Estrin family chair. In recent years, Amir was a faculty member at New York University where he was a NYU Silver Professor. Throughout his career, in spite of an impressive list of achievements, Amir remained an extremely modest and selfless researcher. His unique combination of excellence and integrity has set the tone in the large community of researchers working on specification and verification of programs and systems, program semantics and automata theory. Amir was devoid of any arrogance and those who knew him as a young promising researcher were struck how he maintained his modesty throughout his career. Amir has been an active and extremely hard working researcher till the last moment. His sudden death left those who knew him in a state of shock and disbelief. For his achievements Amir received the 1996 ACM Turing Award. The citation reads: “For seminal work introducing temporal logic into computing science and for outstanding contributions to program and system verification.” Amir also received, for his contributions, the 2000 Israel Award in the area of exact sciences. More recently, in 2007, he shared the ACM Software System Award. -
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Nir Piterman, Associate Professor Coordinates Email: fi[email protected] Homepage: www.cs.le.ac.uk/people/np183 Phone: +44-XX-XXXX-XXXX Research Interests My research area is formal verification. I am especially interested in algorithms for model checking and design synthesis. A major part of my work is on the automata-theoretic approach to verification and especially to model checking. I am also working on applications of formal methods to biological modeling. Qualifications Oct. 2000 { Mar. 2005 Ph.D. in the Department of Computer Science and Applied Mathe- matics at the Weizmann Institute of Science, Rehovot, Israel. • Research Area: Formal Verification. • Thesis: Verification of Infinite-State Systems. • Supervisor: Prof. Amir Pnueli. Oct. 1998 { Oct. 2000 M.Sc. in the Department of Computer Science and Applied Mathe- matics at the Weizmann Institute of Science, Rehovot, Israel. • Research Area: Formal Verification. • Thesis: Extending Temporal Logic with !-Automata. • Supervisor: Prof. Amir Pnueli and Prof. Moshe Vardi. Oct. 1994 { June 1997 B.Sc. in Mathematics and Computer Science in the Hebrew Univer- sity, Jerusalem, Israel. Academic Employment Mar. 2019 { Present Senior Lecturer/Associate Professor in the Department of Com- puter Science and Engineering in University of Gothenburg. Oct. 2012 { Feb. 2019 Reader/Associate Professor in the Department of Informatics in University of Leicester. Oct. 2010 { Sep. 2012 Lecturer in the Department of Computer Science in University of Leicester. Aug. 2007 { Sep. 2010 Research Associate in the Department of Computing in Imperial College London. Host: Dr. Michael Huth Oct. 2004 { July 2007 PostDoc in the school of Computer and Communication Sciences at the Ecole Polytechnique F´ed´eralede Lausanne. -
Tarjan Transcript Final with Timestamps
A.M. Turing Award Oral History Interview with Robert (Bob) Endre Tarjan by Roy Levin San Mateo, California July 12, 2017 Levin: My name is Roy Levin. Today is July 12th, 2017, and I’m in San Mateo, California at the home of Robert Tarjan, where I’ll be interviewing him for the ACM Turing Award Winners project. Good afternoon, Bob, and thanks for spending the time to talk to me today. Tarjan: You’re welcome. Levin: I’d like to start by talking about your early technical interests and where they came from. When do you first recall being interested in what we might call technical things? Tarjan: Well, the first thing I would say in that direction is my mom took me to the public library in Pomona, where I grew up, which opened up a huge world to me. I started reading science fiction books and stories. Originally, I wanted to be the first person on Mars, that was what I was thinking, and I got interested in astronomy, started reading a lot of science stuff. I got to junior high school and I had an amazing math teacher. His name was Mr. Wall. I had him two years, in the eighth and ninth grade. He was teaching the New Math to us before there was such a thing as “New Math.” He taught us Peano’s axioms and things like that. It was a wonderful thing for a kid like me who was really excited about science and mathematics and so on. The other thing that happened was I discovered Scientific American in the public library and started reading Martin Gardner’s columns on mathematical games and was completely fascinated. -
Computational Learning Theory: New Models and Algorithms
Computational Learning Theory: New Models and Algorithms by Robert Hal Sloan S.M. EECS, Massachusetts Institute of Technology (1986) B.S. Mathematics, Yale University (1983) Submitted to the Department- of Electrical Engineering and Computer Science in partial fulfillment of the requirements for the degree of Doctor of Philosophy at the MASSACHUSETTS INSTITUTE OF TECHNOLOGY June 1989 @ Robert Hal Sloan, 1989. All rights reserved The author hereby grants to MIT permission to reproduce and to distribute copies of this thesis document in whole or in part. Signature of Author Department of Electrical Engineering and Computer Science May 23, 1989 Certified by Ronald L. Rivest Professor of Computer Science Thesis Supervisor Accepted by Arthur C. Smith Chairman, Departmental Committee on Graduate Students Abstract In the past several years, there has been a surge of interest in computational learning theory-the formal (as opposed to empirical) study of learning algorithms. One major cause for this interest was the model of probably approximately correct learning, or pac learning, introduced by Valiant in 1984. This thesis begins by presenting a new learning algorithm for a particular problem within that model: learning submodules of the free Z-module Zk. We prove that this algorithm achieves probable approximate correctness, and indeed, that it is within a log log factor of optimal in a related, but more stringent model of learning, on-line mistake bounded learning. We then proceed to examine the influence of noisy data on pac learning algorithms in general. Previously it has been shown that it is possible to tolerate large amounts of random classification noise, but only a very small amount of a very malicious sort of noise. -
Qualitative and Quantitative Security Analyses for Zigbee Wireless Sensor Networks
Downloaded from orbit.dtu.dk on: Sep 27, 2018 Qualitative and Quantitative Security Analyses for ZigBee Wireless Sensor Networks Yuksel, Ender; Nielson, Hanne Riis; Nielson, Flemming Publication date: 2011 Document Version Publisher's PDF, also known as Version of record Link back to DTU Orbit Citation (APA): Yuksel, E., Nielson, H. R., & Nielson, F. (2011). Qualitative and Quantitative Security Analyses for ZigBee Wireless Sensor Networks. Kgs. Lyngby, Denmark: Technical University of Denmark (DTU). (IMM-PHD-2011; No. 247). General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Qualitative and Quantitative Security Analyses for ZigBee Wireless Sensor Networks Ender Y¨uksel Kongens Lyngby 2011 IMM-PHD-2011-247 Technical University of Denmark Informatics and Mathematical Modelling Building 321, DK-2800 Kongens Lyngby, Denmark Phone +45 45253351, Fax +45 45882673 [email protected] www.imm.dtu.dk IMM-PHD: ISSN 0909-3192 Summary Wireless sensor networking is a challenging and emerging technology that will soon become an inevitable part of our modern society. -
On Computational Tractability for Rational Verification
Proceedings of the Twenty-Eighth International Joint Conference on Artificial Intelligence (IJCAI-19) On Computational Tractability for Rational Verification Julian Gutierrez1 , Muhammad Najib1 , Giuseppe Perelli2 , Michael Wooldridge1 1Department of Computer Science, University of Oxford, UK 2Department of Informatics, University of Leicester, UK fjulian.gutierrez, mnajib, [email protected], [email protected] Abstract theoretic (e.g., Nash) equilibrium. Unlike model checking, rational verification is still in its infancy: the main ideas, Rational verification involves checking which formal models, and reasoning techniques underlying rational temporal logic properties hold of a concur- verification are under development, while current tool sup- rent/multiagent system, under the assumption that port is limited and cannot yet handle systems of industrial agents in the system choose strategies in game the- size [Toumi et al., 2015; Gutierrez et al., 2018a]. oretic equilibrium. Rational verification can be un- derstood as a counterpart of model checking for One key difficulty is that rational verification is computa- multiagent systems, but while model checking can tionally much harder than model checking, because checking be done in polynomial time for some temporal logic equilibrium properties requires quantifying over the strategies specification languages such as CTL, and polyno- available to players in the system. Rational verification is also mial space with LTL specifications, rational ver- different from model checking in the kinds of properties that ification is much more intractable: 2EXPTIME- each technique tries to check: while model checking is inter- any complete with LTL specifications, even when using ested in correctness with respect to possible behaviour of explicit-state system representations. -
Signature Redacted
On Foundations of Public-Key Encryption and Secret Sharing by Akshay Dhananjai Degwekar B.Tech., Indian Institute of Technology Madras (2014) S.M., Massachusetts Institute of Technology (2016) Submitted to the Department of Electrical Engineering and Computer Science in partial fulfillment of the requirements for the degree of Doctor of Philosophy at the MASSACHUSETTS INSTITUTE OF TECHNOLOGY September 2019 @Massachusetts Institute of Technology 2019. All rights reserved. Signature redacted Author ............................................ Department of Electrical Engineering and Computer Science June 28, 2019 Signature redacted Certified by....................................... VWi dVaikuntanathan Associate Professor of Electrical Engineering and Computer Science Thesis Supervisor Signature redacted A ccepted by . ......... ...................... MASSACLislie 6jp lodziejski OF EHs o fTE Professor of Electrical Engineering and Computer Science Students Committee on Graduate OCT Chair, Department LIBRARIES c, On Foundations of Public-Key Encryption and Secret Sharing by Akshay Dhananjai Degwekar Submitted to the Department of Electrical Engineering and Computer Science on June 28, 2019, in partial fulfillment of the requirements for the degree of Doctor of Philosophy Abstract Since the inception of Cryptography, Information theory and Coding theory have influenced cryptography in myriad ways including numerous information-theoretic notions of security in secret sharing, multiparty computation and statistical zero knowledge; and by providing a large toolbox used extensively in cryptography. This thesis addresses two questions in this realm: Leakage Resilience of Secret Sharing Schemes. We show that classical secret sharing schemes like Shamir secret sharing and additive secret sharing over prime order fields are leakage resilient. Leakage resilience of secret sharing schemes is closely related to locally repairable codes and our results can be viewed as impossibility results for local recovery over prime order fields. -
Downloaded from 128.205.114.91 on Sun, 19 May 2013 20:14:53 PM All Use Subject to JSTOR Terms and Conditions 660 REVIEWS
Association for Symbolic Logic http://www.jstor.org/stable/2274542 . Your use of the JSTOR archive indicates your acceptance of the Terms & Conditions of Use, available at . http://www.jstor.org/page/info/about/policies/terms.jsp . JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact [email protected]. Association for Symbolic Logic is collaborating with JSTOR to digitize, preserve and extend access to The Journal of Symbolic Logic. http://www.jstor.org This content downloaded from 128.205.114.91 on Sun, 19 May 2013 20:14:53 PM All use subject to JSTOR Terms and Conditions 660 REVIEWS The penultimate chapter, Real machines, is the major exposition on Al techniques and programs found in this book. It is here that heuristic search is discussed and classic programs such as SHRDLU and GPS are described. It is here that a sampling of Al material and its flavor as research is presented. Some of the material here is repeated without real analysis. For example, the author repeats the standard textbook mistake on the size of the chess space. On page 178, he states that 10120 is the size of this space, and uses this to suggest that no computer will ever play perfect chess. Actually, an estimate of 1040 is more realistic. If one considers that no chess board can have more than sixteen pieces of each color and there are many configurations that are illegal or equivalent, then the state space is reduced considerably. -
Annual Report
ANNUAL REPORT 2019FISCAL YEAR ACM, the Association for Computing Machinery, is an international scientific and educational organization dedicated to advancing the arts, sciences, and applications of information technology. Letter from the President It’s been quite an eventful year and challenges posed by evolving technology. for ACM. While this annual Education has always been at the foundation of exercise allows us a moment ACM, as reflected in two recent curriculum efforts. First, “ACM’s mission to celebrate some of the many the ACM Task Force on Data Science issued “Comput- hinges on successes and achievements ing Competencies for Undergraduate Data Science Cur- creating a the Association has realized ricula.” The guidelines lay out the computing-specific over the past year, it is also an competencies that should be included when other community that opportunity to focus on new academic departments offer programs in data science encompasses and innovative ways to ensure at the undergraduate level. Second, building on the all who work in ACM remains a vibrant global success of our recent guidelines for 4-year cybersecu- the computing resource for the computing community. rity curricula, the ACM Committee for Computing Edu- ACM’s mission hinges on creating a community cation in Community Colleges created a related cur- and technology that encompasses all who work in the computing and riculum targeted at two-year programs, “Cybersecurity arena” technology arena. This year, ACM established a new Di- Curricular Guidance for Associate-Degree Programs.” versity and Inclusion Council to identify ways to create The following pages offer a sampling of the many environments that are welcoming to new perspectives ACM events and accomplishments that occurred over and will attract an even broader membership from the past fiscal year, none of which would have been around the world. -
Diffie and Hellman Receive 2015 Turing Award Rod Searcey/Stanford University
Diffie and Hellman Receive 2015 Turing Award Rod Searcey/Stanford University. Linda A. Cicero/Stanford News Service. Whitfield Diffie Martin E. Hellman ernment–private sector relations, and attracts billions of Whitfield Diffie, former chief security officer of Sun Mi- dollars in research and development,” said ACM President crosystems, and Martin E. Hellman, professor emeritus Alexander L. Wolf. “In 1976, Diffie and Hellman imagined of electrical engineering at Stanford University, have been a future where people would regularly communicate awarded the 2015 A. M. Turing Award of the Association through electronic networks and be vulnerable to having for Computing Machinery for their critical contributions their communications stolen or altered. Now, after nearly to modern cryptography. forty years, we see that their forecasts were remarkably Citation prescient.” The ability for two parties to use encryption to commu- “Public-key cryptography is fundamental for our indus- nicate privately over an otherwise insecure channel is try,” said Andrei Broder, Google Distinguished Scientist. fundamental for billions of people around the world. On “The ability to protect private data rests on protocols for a daily basis, individuals establish secure online connec- confirming an owner’s identity and for ensuring the integ- tions with banks, e-commerce sites, email servers, and the rity and confidentiality of communications. These widely cloud. Diffie and Hellman’s groundbreaking 1976 paper, used protocols were made possible through the ideas and “New Directions in Cryptography,” introduced the ideas of methods pioneered by Diffie and Hellman.” public-key cryptography and digital signatures, which are Cryptography is a practice that facilitates communi- the foundation for most regularly used security protocols cation between two parties so that the communication on the Internet today. -
The Best Nurturers in Computer Science Research
The Best Nurturers in Computer Science Research Bharath Kumar M. Y. N. Srikant IISc-CSA-TR-2004-10 http://archive.csa.iisc.ernet.in/TR/2004/10/ Computer Science and Automation Indian Institute of Science, India October 2004 The Best Nurturers in Computer Science Research Bharath Kumar M.∗ Y. N. Srikant† Abstract The paper presents a heuristic for mining nurturers in temporally organized collaboration networks: people who facilitate the growth and success of the young ones. Specifically, this heuristic is applied to the computer science bibliographic data to find the best nurturers in computer science research. The measure of success is parameterized, and the paper demonstrates experiments and results with publication count and citations as success metrics. Rather than just the nurturer’s success, the heuristic captures the influence he has had in the indepen- dent success of the relatively young in the network. These results can hence be a useful resource to graduate students and post-doctoral can- didates. The heuristic is extended to accurately yield ranked nurturers inside a particular time period. Interestingly, there is a recognizable deviation between the rankings of the most successful researchers and the best nurturers, which although is obvious from a social perspective has not been statistically demonstrated. Keywords: Social Network Analysis, Bibliometrics, Temporal Data Mining. 1 Introduction Consider a student Arjun, who has finished his under-graduate degree in Computer Science, and is seeking a PhD degree followed by a successful career in Computer Science research. How does he choose his research advisor? He has the following options with him: 1. Look up the rankings of various universities [1], and apply to any “rea- sonably good” professor in any of the top universities. -
Sooner Is Safer Than Later Department of Computer Science
May 1991 Report No. STAN-CS-91-1360 Sooner is Safer Than Later bY Thomas A. Henzinger Department of Computer Science Stanford University Stanford, California 94305 f- Awwtd REPORT DOCUMENTATION PAGE ma No. 07044188 rt8d to wwq8 I how ou r-. lncllJdlng the ttm8 for nvmwlng tn8uuctl -. wrrtruq 82lsung e8t8 wurcg% Wv*lnQ th8 cOlM(0n Of dormatlon Sand comrrmo I ‘-‘9 th* -om mmate Q arty otwr m ol tha bwdm. to Wnkqtoft ~*dourrtw~ Sewc~. Duator8toT or tnformrt8oe ooer0tm aw v, 121~ - O(cltr of Muwgrmw wbd beget. ?8oemon adato + @~o*olI(i. Woahington. DC 2oSO3. I. AGENCY USE ONLY (Lea- bhd) 2. REPORT DATE 3. REPORT TYPE AND DATES COVERED s/28 p?( I. TITLE AND SulTlTLt 5. FUNDING NUMbERI SomEFz, 15 BIER T&W L-Am 1. PERFORMING ORGANIZATION NAME(S) AND ADDRESS 8. PERFORMING ORGANJZATION REPORT NUMIER jhpx OF- CO~PU’i-ER scii&E STANWD I)tdfhzs’;p/ . 5q-JWFi3RD) CA 9&S I. SPONSORING I’ MONITORING AGENCY NAME(S) AND ADDRESS 10. SPONSORING / MONlTORiNG AGENCY REPORT NUMBER 3ARi’A bJQx39 - 84 c - 020 fd&XW, VA 2220~ I 1. SUPPLEMENTARY NOTES . 12r. DISTRIBUTION / AVAILABILITY STATEMENT lib. DiStRlBUfiON CODE urjL?M:m E. ABSTRACT (Maxrmum 200 words) Abstract. It has been repeatedly observed that the standard safety-liveness classification of properties of reactive systems does not fit for real-time proper- ties. This is because the implicit “liveness” of time shifts the spectrum towards the safety side. While, for example, response - that “something good” will happen, eventually - is a classical liveness property, bounded response - that “something good” will happen soon, within a certain amount of time - has many characteristics of safety.