May 10 :

ExScal: A perspective on Large Scale Wireless Sensor Networks

Anish Arora (Ohio State University)

Recents experiments have evaluated the ability of heterogeneous,hierarchical wireless sensor networks to scale to large node numbers and coverage areas. An exemplar is Project ExScal, where we designed and deployed a network of 1000+ sensor nodes and 200+ 802.11b backbone nodes for a 1.3km by 300m remote, open area. In this talk, we overview key issues in the scaling of wireless sensor network operations and applications, based on lessons derived from ExScal and other related experiments. We discuss at some length the impact of the network characteristics on a number of data management problems related to convergecast, broadcast, and in-network data flows. Finally, we identify challenges for future work in this area.

Anish Arora

Anish Arora is Professor of Computer Science and Engineering at the Ohio State University. Dr. Arora focuses on fault tolerance, security, and timeliness of distributed and networked systems, with special emphasis on sensor networked systems. He is an expert in self-stabilization. He has chaired/co-chaired several seminars/conferences in self-stabilization, as well as in distributed computing and computer networking; most recently, Arora has served as program chair of the 25th International Conference on Distributed Computing Systems (ICDCS'05) and the program co-chair of the Second ACM Conference on Embedded Sensor Networks Systems (SENSSYS'04). Arora is an editor of the ACM Transactions on Sensor Networks, Real Time Systems, and New Generation Systems. His research is presently supported by DARPA, NSF, and Microsoft Research Embedded Systems Program. For more information, please visit


May 11 :

The Changing Face of Web Search

Prabhakar Raghavan (Yahoo! Research)

Web search has come to dominate our consciousness as a convenience we take for granted, as a medium for connecting advertisers and buyers, and as a fast-growing revenue source for the companies that provide this service. Following a brief overview of the state of the art and how we got there, this talk covers a spectrum of technical challenges arising in web search - ranging from social search to auction design and incentive mechanisms.

Prabhakar Raghavan

Prabhakar Raghavan is Head of Yahoo! Research. His research interests include text and web mining, and algorithm design. He is a Consulting Professor of Computer Science at Stanford University and Editor-in-Chief of the Journal of the ACM. Raghavan received his PhD from Berkeley and is a Fellow of the ACM and of the IEEE. Prior to joining Yahoo, he was Senior Vice-President and Chief Technology Officer at Verity; before that he held a number of technical and managerial positions at IBM Research.


May 12 :

The convergence of Mobile and Enterprise software

Toru Hayashi (Oracle Corporation Japan)

The two big paradigm shift will be totally changed the
IT and communication industry near futhure. The first wave is fixed mobile convergence and the second wave is gSoftware as a serviceh. After the fixed mobile convergence world, the enterprise business application user can easy to access and update enterprise information and asset via mobile phone from outside office. The other way, Oracle Corporation CEO Larry Ellison did fundamental
prediction that the traditional software license business model will be changed to usage payment model about five years ago. It called gSoftware as a serviceh The synchronization of the big paradigm shift will make new business opportunity and benefit to the mobile phone user. I'd like to introduce Oracle's experience in this world.

Toru Hayashi

Toru Hayashi has joined Oracle Corporation Japan in July 1994 and manages Advanced Solution Development division since 2004. His team is developing new solutions to the emerging market, such as utility computing, enterprise mobile solution, enterprise blog and location based services framework, etc. He served on Content ID Forum as a securitant from 2000 to 2003; Prior to joining Oracle Corporation Japan, he was parallel processing computer graphics engineer at Mitsubishi Precision Co.,Ltd.