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Prof. PRITI SHANKAR MEMORIAL SEMINAR SERIES



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Series: Professor Priti Shankar Memorial Lecture Series
Title: Towards Rigorous Factoring

  • Speaker: Dr. Ramarathnam Venkatesan
                   Principal Researcher, Microsoft Research
  • Date and Time: Friday, August 01, 2014, 3:00 PM
  • Venue: CSA Seminar Hall (Room No. 254, First Floor)

Abstract
For decades, the index calculus algorithms for factoring and discrete logarithm problems have served as the benchmarks for evaluating parameters of cryptographic systems. Yet, the best algorithms have steadfastly eluded a rigorous analysis. We present analysis of these and present bounds matching the heuristic estimates. To analyze the quadratic sieve we introduce new conjectures related to Fourier coefficients of indicator functions of semi-primes and ranks of matrices. Joint with Jonathan D Lee, Trinity College, Cambridge UK.

Host Faculty: Dr. Arnab Bhattacharyya

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Series: Professor Priti Shankar Memorial Lecture Series
Title: Human Brain: Complexity Behind The Simplicity

  • Speaker: Prof. V. Ravindranath
  • Date and Time: Saturday, March 01, 2014, 10:00 AM
  • Venue: CSA Seminar Hall (Room No. 254, First Floor)

Abstract
The human brain is the interpreter of our senses, controller of movement and in fact responsible for all we embrace as civilization. It consists of about 100 billion nerve cells which are interconnected through a million billion connections measuring up to 3.2 million kilometer of wiring. This wiring is essential for performing simplest to the most complex tasks. In the last two decades we have witnessed an explosion of knowledge in neuroscience. The stage is set for a more thorough understanding of the brain and for translating this knowledge into strategies to protect the brain from the vagaries of nature, both genetic and environmental. In order to achieve this goal, neuroscience research has accommodated multidisciplinary methods integrating the many levels of functional organisation of the brain, from molecules to neurons to networks to systems and behavior. Apart from the interest in understanding how the brain performs cognitive functions and finding links between behavior, brain and mind, there are serious health related issues. Brain-related disorders affect large sections of population and contribute up to one-third of the total disease burden in both developing and developed nations. From birth to old age, a host of neurological and mental illnesses afflict mankind. Most of these are poorly understood and treatments are palliative rather than curative. Through the study of the normal brain and its disorders, brain research can help development of children, enrich adult life, and help us age gracefully.

Speaker Bio:
Dr. Vijayalakshmi Ravindranath obtained her Ph.D from the University of Mysore) in 1981. In 1986, after completing her Post-Doctoral training at the NCI, NIH, USA, she joined the National Institute of Mental Health and Neurosciences, (NIMHANS) Bangalore. In 2000, as founder director, she helped establish the National Brain Research Centre (NBRC), an autonomous institution funded by Government of India as an institute of excellence and apex coordination centre for brain research that co-ordinates and networks neuroscience research groups in the country. She continued as Director, NBRC till April 2009, when she returned to Bangalore at the Indian Institute of Science as Professor and Chair of the newly created Centre for Neuroscience. She has actively promoted neuroscience research and training and helped establish several pan-Indian efforts in brain research. The unifying goal of her laboratory is to understand pathogenic mechanisms underlying neurodegenerative disorders with a goal to discover disease-modifying therapies from traditional knowledge base. She is an elected Fellow of all the 3 science academies in India, namely Indian National Science Academy, Indian Academy of Sciences, National Academy of Sciences, India. She is also a Fellow of the National Academy of Medical Sciences, India, Indian Academy of Neurosciences and Third World Academy of Sciences. She is a recipient of the prestigious S.S. Bhatnagar award (1996), Omprakash Bhasin Award (2001), the J.C. Bose National Fellowship (2006) and Padma Shri (2010).

Host Faculty: Prof. Y. Narahari

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Series: Professor Priti Shankar Memorial Lecture Series
Title: Global Technology Outlook (GTO) 2013

  • Speaker: Dr. C. Mohan
                   IBM Fellow
  • Date and Time: Thursday, July 11, 2013, 4:00 PM
  • Venue: CSA Seminar Hall (Room No. 254, First Floor)

Abstract
The Global Technology Outlook (GTO) is IBM Research's vision of the future for information technology (IT) and its impact on industries that use IT. This annual exercise highlights emerging software, hardware, and services technology trends that are expected to significantly impact the IT sector in the next 3-7 years. In particular, the GTO identifies technologies that may be disruptive to an existing business, have the potential to create new opportunities, and can provide new business value to our customers. The 2013 GTO is built not only on its 31 predecessors, but the 100 years of IBM innovation. The 2013 GTO reports on six key findings which form 2 groups. The first group addresses The Rapidly Evolving Infrastructure while the second one addresses The Future of Big Data and Analytics. The six topics of GTO 2013 are: Mobile First, Scalable Services Ecosystems, Software Defined Environments, Multimedia and Visual Analytics, Contextual Enterprise and Personalized Education. In this talk, I will share the GTO 2013 findings with the audience. This talk should be of interest to not only technical people but also to a much broader set of people.

Speaker Bio:
Dr. C. Mohan has been an IBM researcher for 31 years in the information management area, impacting numerous IBM and non-IBM products, the research community and standards, especially with his invention of the ARIES family of locking and recovery algorithms, and the Presumed Abort commit protocol. This IBM, ACM and IEEE Fellow has also served as the IBM India Chief Scientist. In addition to receiving the ACM SIGMOD Innovation Award, the VLDB 10 Year Best Paper Award and numerous IBM awards, he has been elected to the US and Indian National Academies of Engineering, and has been named an IBM Master Inventor. This distinguished alumnus of IIT Madras received his PhD at the University of Texas at Austin. He is an inventor of 38 patents. He serves on the advisory board of IEEE Spectrum and on the IBM Software Group Architecture Board’s Council. More information can be found in his home page at http://bit.ly/CMohan

Host Faculty: Prof. Y. Narahari

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Series: Professor Priti Shankar Memorial Lecture Series
Title: Combating Malware and Engineering the Science of Security : Issues and Challenges

  • Speaker: Prof. R.K. Syamasundar
                    [Tata Institute of Fundamental Research]
  • Date and Time: Saturday, March 02, 2013, 11:00 AM
  • Venue: CSA Seminar Hall (Room No. 254, First Floor)

Abstract
In this talk, we discuss two aspects: methods for malware detection and realizing security and integrity policies through any programming language based on controlling flow of information. In the former, we discuss approaches of malware detection ranging from syntactic to semantic techniques and their limitations and current approaches to detect complex virus including metamorphic and polymorphic viruses. In the second half of the talk, we discuss approaches for realizing the necessary security and integrity policies for controlling information flow in systems with mutual distrust and decentralized authority. In the context of multilevel security, we how user scan share information with distrusted code but still able to control how that code disseminates the shared information to others. Such approaches shall form the core science of security.

Speaker Bio:
R K Shyamasundar is a Fellow of IEEE, a Fellow ACM, Distinguished ACM Speaker, served as IEEE Distinguished Speaker. He is currently Senior Professor and JC Bose National Fellow at the Tata Institute of Fundamental Research. He has more than 300 publications, 8 books, 8 international patents & 3 Indian patents. Thirty five students have completed Ph.D. under his guidance, has served on IEEE Standards and served as consultant to ESPRIT projects. He did post doctoral work under the legendary Turing Laureate Professor Dr. Edsgar Dijkstra and was a Distinguished Visiting fellow under Royal Academy of Engineering at the Computing Laboratory of University of Cambridge. He has served as Faculty/Staff at IBM TJ Research, Eindhoven University, State University of Utrecht, Pennsylvania State University, University of Illinois, University of California, San Diego, IRISA, Max Planck Institute , IBM Research India etc. He was Founding Chair of FSTTCS and founding President of IARCS. He serves on the Governing Council of IIIT Allahabad, IIIT, Jabalpur, CSIR Centre CMMACS, Bangalore and serves on the Technical Advisory Board of BSE (Bombay Stock Exchange). He has served on IEEE Esterel Standards Committee. He is a Fellow of: Indian Academy of Sciences, Indian National Science Academy, National Academy of Sciences, National Academy of Engineering and a Fellow of the Academy of Sciences of the Developing world (TWAS), Trieste, Italy. He is also a Fellow of the Computer Society of India.

Host Faculty: Prof. Y. Narahari

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Series: Professor Priti Shankar Memorial Lecture Series
Title: Probabilistic Approximations of ODEs based Bio-pathways Dynamics

  • Speaker: P.S. Thiagarajan
  • Date and Time: Friday, September 28, 2012, 4:00 PM
  • Venue: CSA Seminar Hall (Room No. 254, First Floor)

Abstract
A system of Ordinary Differential Equations (ODEs) is often used to model the dynamics of a bio-chemical network. Such systems are difficult to analyze. To get around this, we have constructed a discrete probabilistic approximation of the ODE dynamics as a dynamic Bayesian network. Consequently, pathway properties can be analyzed using standard Bayesian inference techniques. We have tested our method on a number of pathways models taken from the biomodels data base. We have also carried out a combined computational and experimental study of the human complement system under inflammation conditions. Recently we have extended the scalability of our approach via a GPU implementation. We have also constructed an approximate verification method using a simple probabilistic temporal logic.

"Note: This talk is co-sponsored by ACM Bangalore"

Speaker Bio:
P.S. Thiagarajan is a Professor in the Department of Computer Science, National University of Singapore and a Senior Faculty Member of the NUS Graduate School of Integrative Science and Engineering (NGS). He received a B.Tech degree from the Indian Institute of Technology, Madras, India (1970) and a PhD degree (Computer Science) from Rice University, Houston, Texas, USA (1973). He has been a Research Associate at the Massachusetts Institute of Technology, a Research Scientist at the Gesselschaft fuer Mathematik und Datenverarbeitung (GMD), St. Augustin, Germany, a Lektor (Associate Professor) in the Computer Science department of Aarhus University, Denmark, an Associate Professor at the Institute of Mathematical Science, Chennai, India and a founding professor of the Chennai Mathematical Institute, Chennai, India.

Before moving to NUS his research had been devoted to various aspects of concurrency theory including Petri nets, temporal logics and supervisory control. At NUS, he has focused mainly on real time, hybrid and embedded systems. In recent years, his interest has shifted to computational systems biology.

He currently serves on the editorial boards of the Real-Time Systems journal and Transactions on Petri Nets and Other Models of Concurrency. He is a Fellow of the Indian Academy of Sciences, and a Fellow of the Indian National Academy of Sciences.

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Series: Professor Priti Shankar Memorial Lecture Series
Title: Fault-Tolerance Via Idempotence

  • Speaker: Dr. Ganesan Ramalingam,
                   Microsoft Research India
  • Date and Time: Friday, August 31, 2012, 5:00 PM
  • Venue: CSA Seminar Hall (Room No. 254, First Floor)

Abstract
Writing applications for distributed systems is challenging because of the pitfalls of distribution such as process failures, communication failures, asynchrony and concurrency. Abstractions such as distributed transactions and workflows address some of these pitfalls, but many challenges remain.

One common requirement and challenge is the need for distributed applications that are idempotent. Idempotence ensures that the application functions correctly even when clients send duplicate requests, perhaps because the application failed to generate a response due to process failures, or because the response was generated but lost. Idempotence simplifies the composition of applications through imperfect communication channels and simplifies recovery from process failures. However, guaranteeing idempotence is a manual, tedious, and fault-prone process, especially for complex computations such as workflows.

In this talk, we discuss the requirements of fault-tolerance as well as idempotence. We show how idempotence can be automatically ensured, using a monad. We show how this gives us fault-tolerance, for almost free, without using distributed coordination.

Speaker Bio:
G. Ramalingam received his B. Tech from IIT Madras and his Ph.D. from the University of Wisconsin-Madison. He was a researcher at IBM T. J. Watson Research Center from 1993 to 2006. G. Ramalingam has been at Microsoft Research India from 2006. His research interests are in the area of Programming Languages and Tools, with a particular interest in Static Program Analysis, Program Understanding, Software Verification, Concurrency and Distributed Systems.

Host Faculty: Prof. Y. Narahari

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Series: Professor Priti Shankar Memorial Lecture Series
Title: My work with Prof. Priti Shankar and its impact on my Professional Life

  • Speaker: Dr. B.S. Adiga, TCS
  • Date and Time: Friday, May 11, 2012, 5:00 PM
  • Venue: CSA Seminar Hall (Room No. 254, First Floor)

Abstract
The talk is about application of Elliptic curve based cryptography for sensor networks which essentially use mobile phones as nodes. The speaker gives a detailed description of his work with Prof Priti Shankar during 1980s regarding the application of Pseudo-Mersenne/ Fermat numbers and Fermat Number Theoretic Transforms in developing fast algorithms for long integer multiplication and modular reduction. These concepts have been further developed by Paar and Baily of Wooster Polytechnic USA under the frame work of Optimum Extension Fields (OEF). At present OEFs have been drafted into 1363 Standards on Elliptic Curve Cryptography. The talk is intended to give impetus to further research in this area.

Speaker Bio:
Dr. B.S. Adiga received his PhD from CSA, IISc under the guidance of Prof. Priti Shankar. He was a Scientist at National Aerospace Laboratory, Bangalore for 21 years from 1975 to 1996. He was a Principal Scientific Officer at Motorola India Electronics, Bangalore for 5 years from 1996 to 2001 and at Philips Innovation Center, Bangalore for 5 years from 2001 to 2006. He is currently an Advisor at TCS Innovation Labs, Bangalore. He is also a Visiting Professor of IIT Bombay from 2007. His area of research includes Signal Processing, Error Control Coding, Cryptography and Super Computing.

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