Posts Tagged ‘Crista Lopes’

GroceryTime wins Butterworth Competition - June 7th, 2011

GroceryTime check

GroceryTime award check

Congrats to Boaz Grudin and team for winning $5000.00 in this year’s Butterworth Competition.

Our dean, Hal Stern described the competition this way:

This year’s competition had 16 teams enter with 8 making it through to the final stage of product demonstration. The winning team developed GroceryTime, a mobile app that lets grocery shoppers discover the best products in the grocery store. The members were Jackie Doong, Boaz Gurdin, and Arthur Valadares. They were mentored by alum David Cheng of our Leadership Council. Their prize is $5000 and 6 months rent for space in the Irvine Incubation Center.

Here I’d like to thank Ramesh Jain and [Informatics faculty] Crista Lopes for their help in developing this year’s Butterworth Competition. Several faculty served as team mentors (Ramesh, Don Patterson, Judy Olson, Dan Frost) and I’d like to thank them as well. Finally I’d like to recognize the efforts of Kristin Huerth who put in a great deal of time and did a great job of keeping the competition going until its successful conclusion.

Our hope is to start the Butterworth Competition early in the academic year next Fall. This would enable our teams to join up with others on campus for the Business School’s business plan competition if they desire. If you would like to participate next year (as a mentor, judge, or just to help organize), please contact Kristin Huerth at khuerth@ics.uci.edu.

Thanks.


First Place Prize: $5,000
*GroceryTime*
Team Members: Jackie Doong, Boaz Gurdin, Arthur Valadares
Mentor: David Cheng

Project Description:
GroceryTime is a mobile app that lets grocery shoppers discover the best products in the grocery store. Today grocery shoppers face a paradox of choice: the abundance in grocery stores is at once gratifying and overwhelming. GroceryTime assists shoppers in two main ways: we help users decide what to buy, and give food connoisseurs a place to share their knowledge with friends and the larger food community. Users can scan barcodes to quickly read and write reviews. In addition to user reviews, brands and grocery stores can advertise directly to shoppers, influencing their buying decision at the point of sale. With GroceryTime, a tasteful life is a barcode scan away!


Second Place Prize: $3,500

*AntColony*
Team Members: Azia Foster, Hiroe Ono, Garrett Kim
Mentor: Professor Don Patterson

Seon is an android and web-based application designed to let UCI students define their community for others. Using GPS technology, Seon is able to pin point a multitude of locations, filter them, and show them in real time using the phone’s camera. Users can use this to find desired location, look up operational hours, or discover a new local place.


Third Place Prize: $1,500

*Ubiquity*
Team Members: Alberto Pareja-Lecaros, Ankita Raturi, Nathan Fulton
Mentor: Professor Ramesh Jain

Project Description:
Ubiquity is a private networking client that delivers all your digital content from any device, anywhere, anytime. It offers a Distributed Effortless Workspace (DEW) that gives user’s constant, uninterrupted access to all their files. The DEW connects to a networking infrastructure that seamlessly integrates the user’s digital content into a common Workspace, allowing them to access their files through either a web client or a Ubiquity client installed on any of their devices. Ubiquity also features Implicit Version Control, giving users the ability to pull up previous versions of the same file at any time. Ubiquity will change the way people experience their digital content.


A special thank you to:
SPONSORS
Paul Butterworth, B.S. ’74, M.S. ’81
Ilie Ardelean, B.S. ’96
Google
Yahoo!

MENTORS
Ilie Ardelean, B.S. ’96
Sherman Chen, B.S. ’89, Health Care Legal Services
David Cheng, B.S. ’91, Program Director, Healthcare Products & Solutions, IBM
Dan Frost, Lecturer, Bren:ICS
John Herpy, B.S. ’85, Boeing
Ramesh Jain, Bren Professor, Information and Computer Science, Bren:ICS
Zack Ji, B.S. ’07, Vocado
Greg Moulton, B.S. ’82
Judy Olson, Bren Professor, Information and Computer Science, Bren:ICS
Don Patterson, Assistant Professor, Informatics, Bren:ICS

JUDGES
Greg Bolcer, B.S. ’89, Ph.D. ’98, CTO and Founder, Kerosene and a Match
Matthew Jenusaitis, President & CEO, OCTANe
Kevin Kinsey, CEO, Netreo
Roger Lloyd, CMO, Immerz,
Brian Roach, Principal Consultant & CEO, Evolve Partners Inc.,
Bob Romney, Chair, Leadership Council, Bren:ICS

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Posted: 6/7/11 4:22 pm UTC by Make the First Comment
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Bagging Gradient-Boosted Trees for High Precision, Low Variance Ranking Models - April 8th, 2011

Moleskins and Pens

Photo courtesy of paulworthington

Congratulations to Informatics graduate student Yasser Ganjisaffar, Informatics faculty Crista Lopes and their collaborator Rich Caruana from Microsoft on having their paper,
‘Bagging Gradient-Boosted Trees for High Precision, Low Variance Ranking Models’ accepted to SIGIR 2011.

Abstract: Recent studies have shown that boosting provides excellent predictive performance across a wide variety of tasks. In Learning-to-rank, boosted models such as RankBoost and LambdaMART have been shown to be among the best performing learning methods based on evaluations on public data sets. In this paper, we show how the combination of bagging as a variance reduction technique and boosting as a bias reduction technique can result in very high precision and low variance ranking models. We perform thousands of parameter tuning experiments for LambdaMART to achieve a high precision boosting model. Then we show that a bagged ensemble of such LambdaMART boosted models results in higher accuracy ranking models while also reducing variance as much as 50%. We report our results on three public learning-to-rank data sets using four metrics. Bagged LamdbaMART outperforms all previously reported results on ten of the twelve comparisons, and bagged LambdaMART outperforms non-bagged LambdaMART on all twelve comparisons. For example, wrapping bagging around LambdaMART increases NDCG@1 from 0.4137 to 0.4200 on the MQ2007data set; the best prior results in the literature for this data set is 0.4134 by RankBoost.

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Posted: 4/8/11 6:40 pm UTC by Make the First Comment
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LUCI affliates’ research on ‘World of Warcraft’ makes national politics - December 22nd, 2010

World of Warcraft

World of Warcraft

LUCI researchers and other faculty from our Department of Informatics have found themselves in the crosshairs of national politics as described in an article in the O.C. Register:

“Maybe it’s a generation gap thing. But the $3 million that went to UC Irvine researchers to study “Decentralized Virtual Activities and Technologies” has been branded one of the worst wastes of taxpayer dollars of 2010 by U.S. Sen. Tom Coburn, R-OK….

The game is made by Blizzard Entertainment of Irvine, and the researchers are Walt Scacchi, Bonnie Nardi, Richard Taylor, Gloria Mark and Cristina Lopes.”

via UCI ‘World of Warcraft’ research squandered $3 million, critic says – OC Watchdog : The Orange County Register.

We’ll link to Bonnie’s response which is being published tomorrow at the University of Michigan Press.  But a few things worth noting… video games are a big part of our local economy.  Blizzard employs 4600 people.  This research has been nominated for best paper awards at CSCW and any of the local faculty can tell you that the NSF isn’t exactly spewing out tax payer money these days.

Walt’s response, filtered by the press is here:
Slam on UCI is ’sign of distinction’ and ‘compliment,’ researcher says

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Posted: 12/22/10 10:19 pm UTC by Make the First Comment
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Sara Javanmardi places 3rd in Wikipedia Vandalism Contest - July 7th, 2010

PAN 2010 Logo

Congratulations to Sara Javanmardi, a Ph.D. student in Informatics working with Prof. Crista Lopes, on placing third in an international competition for detecting vandalism in Wikipedia.

Vandalism has always been one of Wikipedia’s biggest problems, yet there are only few automatic countermeasures. Instead, volunteers spend their time in reverting vandalism edits — time, which is not spend on improving other parts of the Wikipedia. The goal of the evaluation campaign was to research and develop new, reliable ways to detect vandalism edits, which can be used to aid Wikipedia.

Sponsored by Yahoo! Research, the competition is part of the fourth International Workshop on Uncovering Plagiarism, Authorship, and Social Software Misuse PAN-10 will be held as an evaluation lab in conjunction with the Conference on Multilingual and Multimodal Information Access Evaluation in Padua, Italy.

Full ICS press release here.

Full details of the contest can be found here.

Congratulations Sara and Crista!

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Posted: 7/7/10 6:19 pm UTC by Make the First Comment
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Prof. Crista Lopes is an IEEE Senior Member - May 25th, 2010

Professor Cristina LopesCongratulations to Informatics Professor Crista Lopes on being elected a Senior Member of the IEEE.

From the ICS Press Release here:

Dr. Lopes is best known as one of the co-inventors of Aspect-Oriented Programming. She conducts research in software engineering, specifically in large-scale source code search and analysis, and architectures for massive multi-user systems.

Congratulations Crista!

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Posted: 5/25/10 3:46 pm UTC by Make the First Comment
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Scalable Virtual Worlds Talk - December 9th, 2009

From Prof. Crista Lopes:

I’d like to let you know of this talk next week. All welcome.

WHEN: Thursday, December 17, 12:30 – 1:30pm
WHERE: Bren Hall, #5011
WHO: Mic Bowman, Principal Engineer, Intel Research
HOST: Crista Lopes, ICS & Calit2

Scalable Virtual Worlds

At the core of most virtual world applications is a quadratic computation of the set of interactions among avatars (users) and a shared scene. The computation and associated communication of the results represents a fundamental barrier to scaling experiences in these applications. The common solution to the problem is to limit the interaction among avatars through spatial subdivision or sharding. With both approaches, the content and shape of the interaction is driven by the limits of the simulation. In this talk we will describe a virtual world architecture that is designed to scale interactions among avatars and the scene without the limits imposed by current subdivision approaches. We use distributed systems technologies to balance the simulation load dynamically and to optimize network communication. We apply graphics technologies to limit the amount of network traffic that is generated for every client. And we apply information theory to reduce the overall computation that is required. A prototype of the architecture based on OpenSim, an open source virtual world platform, demonstrates significant scalability improvements over existing approaches.

BIOGRAPHY:

Mic Bowman is a principal engineer in Intel Labs and manages the Virtual World Infrastructure group. Bowman received his BS from the University of Montana, and his MS and PhD in Computer Science from the University of Arizona. Bowman joined Intel’s Personal Information Management group in 1999. While at Intel, He developed personal information retrieval applications, context-based communication systems, and middleware services for mobile applications. In addition, he led the team that built and deployed the first version of PlanetLab, a global testbed for networking research. Prior to joining Intel he worked at Transarc Corp. where he led research teams at that developed distributed search services for the Web, distributed file systems, and naming systems.

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Posted: 12/9/09 12:07 pm UTC by Make the First Comment
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Automated Dependency Analysis for Internet-Scale Code Reuse - June 16th, 2009

Celebration Balloons

Photo courtesy of flickr:eye2eye (247583501)

Congratulations to Joel Ossher on passing his advancement to candidacy exam!

Thesis: Automated Dependency Analysis for Internet-Scale Code Reuse

Committee:
Crista Lopes (Chair)
Jim Jones
Andre van der Hoek
Ian Harris
Jim Hicks

Software reuse by search-copy-paste-and-adapt has become a common practice in software development, along with other more traditional forms of reuse. Opportunities for this kind of reuse are plentiful, thanks in large part to the widespread adoption of open source processes and the availability of search engines for locating relevant code. Despite increased availability, merely locating an appropriate artifact to reuse is not sufficient. There remains the challenge of developing an understanding of its workings as well as integrating it into a project. This is made more difficult by the interconnected nature of complex software, as a single artifact may touch many different pieces of the system. This greatly complicates localizing usage examples and extracting reusable pieces from existing code. This paper presents a novel method of static dependency analysis to help support the understanding and integration of reusable code. Our dependency slicing algorithm automatically isolates self-contained slices from a source program, thereby dramatically reducing the amount of source code irrelevant to the artifact of interest. We describe how we modified Sourcerer, an infrastructure for internet-scale open source code search, to support an implementation of our dependency slicing algorithm. An empirical evaluation showed that the slicing algorithm introduced no compilation errors. Further, compared to the standard approach to dependency resolution, it reduced the number of files required by up to 300 times and decreased the number of declarations in these files by up to 4000 times.

Congrats Joel!!

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Posted: 6/16/09 4:24 pm UTC by Make the First Comment
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On Improving Search in Wikipedia - June 5th, 2009

Celebration Balloons

Photo courtesy of flickr:eye2eye

Congratulations to Yasser Ganjisffar on passing his advancement to candidacy exam!

Thesis: On Improving Search in Wikipedia

Committee:
Crista Lopes (Chair)
Faryar Jabbari
Ramesh Jain
Jim Jones
Don Patterson

Wikipedia, the largest encyclopedia on the Web, is often seen as the most successful example of crowdsourcing. The encyclopedic knowledge it accumulated over the years is so large that one often uses search engines, to find information in it. In contrast to regular Web pages, Wikipedia is fairly structured, and articles are usually accompanied with history pages, categories and talk pages. The meta–data available in these pages can be analyzed to gain a better understanding of the content and quality of the articles. We analyze the quality of search results of the current major Web search engines (Google, Yahoo! and Live) in Wikipedia. We discuss how the rich meta–data available in wiki pages can be used to provide better search results in Wikipedia. Built on the studies on “Wisdom of Crowd” and the effectiveness of the knowledge collected by a large number of people, we investigate the effect of incorporating the extent of review of an article in the quality of rankings of the search results. The extent of review is measured by the number of distinct editors contributed to the articles and is extracted by processing Wikipedia’s history pages. Our experimental results show that re–ranking search results of the three major Web search engines using the review feature improves quality of their rankings for Wikipedia–specific searches. We also compare the effectiveness of the proposed review–based ranking with PageRank based
ranking.

Congrats Yasser!

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Posted: 6/5/09 1:04 pm UTC by Make the First Comment
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“Second Life as a Simulation Tool” - December 20th, 2007

Crista Lopes is featured in an O.C. Register article for the way in which she is using Second Life as a simulation environment for things like ubiquitous computing environments.

“UC Irvine computer scientist Crista Lopes was happy to do all her work in the real world – until February, that is.

In the programming process, Lopes said, she discovered that the simplified physics of Second Life are close enough to the physics of the real world that Second Life can be used as an inexpensive simulation tool by small- to medium-sized companies. It’s a low-cost alternative to the sophisticated simulation programs in use by industrial designers at big-bucks enterprises such as NASA and the military, as well as Boeing and other aerospace contractors. ”

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Posted: 12/20/07 12:18 pm UTC by Make the First Comment
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Congratulations Crista and Bill! - February 9th, 2007


Photo courtesy of
paulworthington

Congratulations to Crista and Bill on receiving a 2007 Dean’s Award:

The full list is:
Dean’s Award for Research: Padhraic Smyth
Dean’s Award for Service: Crista Lopes
Dean’s Award for Graduate Student Mentoring: Michael Franz
Dean’s Award for Undergraduate Teaching: Bill Tomlinson

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Posted: 2/9/07 8:00 am UTC by Make the First Comment
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