Inference on Maximum Structural Response Based on Measured Accelerations Using Dynamic Bayesian Network
Tien, I., Pozzi, M., and Der Kiureghian, A., “Inference on Maximum Structural Response Based on Measured Accelerations Using Dynamic Bayesian Network,” In G. Deodatis, B. Ellingwood, and D. Frangopol, eds. Safety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures, New York: CRC Press, pp. 2481-2488, June 2013
Abstract — A dynamic Bayesian network (DBN) is a useful tool for analyzing uncertain systems that evolve with time. As such, it is useful in structural health monitoring applications where measurements can be read more…
Research Profiles – Iris Tien
It’s easy to forget that consequences, even unintended ones, sometimes can be positive.
After Hurricane Katrina closed universities in New Orleans, UC officials offered students a chance to spend fall semester of 2005 at various UC campuses, including Berkeley. Their only motive was humanitarian. But the gesture affected students, including at least one at UC Berkeley, in unanticipated ways.
Iris Tien was an undergraduate then. As a resident assistant, responsible for two floors of an eight-floor dormitory, she was responsible for converting dormitory lounges into bedrooms and hosting events to help the New Orleans students feel at home.
Fast forward seven years. As a 24-year-old civil and environmental engineering graduate student in UC Berkeley’s Civil Systems Program, Tien is modeling complex infrastructure — research that might someday be used to determine weak spots in bridges, highways and water systems, including the kinds of levees that broke under the onslaught of Hurricane Katrina.
As the U.S. grapples with declining infrastructure and tight budgets, Tien’s work could prove particularly useful. Last year, the American Society of Civil Engineers reported that the poor condition of our highways, railroads, bridges and transit systems cost $130 billion in 2010 alone. To bring infrastructure back to minimum standards, the U.S. would need to invest $846 billion over nine years, or $94 billion per year. Yet partisan politics is keeping investment at a minimum.
It’s no wonder that Tien’s research on infrastructure cost-saving is getting attention. read more…
2012 Fellows Reception
By Dick Corten, slideshow by Peg Skorpinksi | March 21, 2012
It was not hard for a good time to be had by all. The atmosphere was convivial, the mood was celebratory, there were plenty of people to talk to, and — always a priority for grad students — there was food. And not only that, the food was good.
The occasion was the Berkeley Distinguished Graduate Fellows Reception, an annual event, held this year in the banner-festooned auditorium of International House read more…
Using a Wireless Inertial Sensor System to Characterize Gait Abnormalities in Parkinson’s Disease
Tien, I., and Aminoff, M., “Using a Wireless Inertial Sensor System to Characterize Gait Abnormalities in Parkinson’s Disease,” Movement Disorders, Vol. 27, Issue Supplement S1, pp. S142, June 2012
Graduate students take their research to the Capitol
By Nicole Freeling | March 15, 2012
To many people, graduate student research is a little-known corridor in the halls of higher education. To some it is perceived as a mysterious side nook in the ivory tower, where esoteric research is conducted for obscure ends.
On March 14, a delegation of 20 graduate students and deans traveled to Sacramento to give lawmakers a very different perspective: that of graduate student research as central not only to the future of the University of California, but to that of the state and the nation as well. read more…
Impact of Online Marketing Channels on Customer Purchase Visits: Aggregate- and Individual-Level Models
Tien, I., and Jamal, Z., “Impact of Online Marketing Channels on Customer Purchase Visits: Aggregate- and Individual-Level Models,” HP Labs Technical Report, August 2011
Intern profile – Iris Tien
This is a series of profiles featuring interviews with some of this year’s crop of summer interns at HP Labs.
We continue the series with an interview with Iris Tien who was recruited by the Services Research Lab.
A Bay Area native, Iris Tien gets to stay with her parents in Cupertino while interning at HP Labs’ Palo Alto campus. “It’s good, actually!” she assures us, “plus I get to bike to work about twice a week.” Usually, Tien lives over in Berkeley, where she’s entering her fourth year as a PhD student in Systems Engineering at the University of California. She attended UC Berkeley as an undergraduate, too, majoring in Civil and Environmental Engineering. When she’s not crunching numbers, Tien enjoys playing basketball and tennis, listening to opera, and making jewelry.
HP: What have you been working on during your internship?
I’ve been working with Zainab Jamal and Fereydoon Safai in HP’s Services Research Lab as part of the Marketing Optimization Project. Specifically, I’ve been looking at HP customer data and relating it to how HP spends its online marketing resources. I’m interested in understanding how the channels through which people arrive at the HP Shopping site – like search, coupons or email — impact what different customers do.
HP: Can you tell us what you’ve found out?
Well, a lot of this is proprietary, but read more…
Characterization of Gait Abnormalities in Parkinson’s Disease Using a Wireless Inertial Sensor System
Tien, I., Glaser, S., and Aminoff, M., “Characterization of Gait Abnormalities in Parkinson’s Disease Using a Wireless Inertial Sensor System,” 32nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society, Buenos Aires, Argentina, pp. 3353-3356, August 31-September 4, 2010
Abstract — Gait analysis is important in diagnosing and evaluating certain neurological diseases such as Parkinson’s disease (PD). In this paper, we show the ability of our wireless inertial sensor system to read more…
Results of Using a Wireless Inertial Measuring System to Quantify Gait Motions in Control Subjects
Tien, I., Glaser, S., Bajcsy, R., Goodin, D., and Aminoff, M., “Results of Using a Wireless Inertial Measuring System to Quantify Gait Motions in Control Subjects,” IEEE Transactions on Information Technology in Biomedicine, Vol. 14, No. 4, pp. 904-915, July 2010
Abstract — Gait analysis is important for the diagnosis of many neurological diseases such as Parkinson’s. The discovery and interpretation of minor gait abnormalities can aid in early diagnosis. We have used an read more…
Structural Health Monitoring and Evaluation of Human Gait to Assist in the Diagnosis of Parkinson’s Disease
Tien, I., and Glaser, S., “Structural Health Monitoring and Evaluation of Human Gait to Assist in the Diagnosis of Parkinson’s Disease,” Proceedings, 7th International Workshop on Structural Health Monitoring, Stanford, CA, September 9-11, 2009
Abstract — The human body is a complex structure, and its structural health can be monitored using sensors. A system using wireless inertial measurement units for data acquisition and the monitoring of human read more…
Detecting and Quantifying Gait Abnormalities in Parkinson’s Patients Using Wireless Inertial Measurement Units
Tien, I., “Detecting and Quantifying Gait Abnormalities in Parkinson’s Patients Using Wireless Inertial Measurement Units,” Center for Information Technology Research in the Interest of Society Open House, Berkeley EECS Annual Research Symposium, Berkeley, CA, February 2009
Quantifying Diagnosis of Neurological Conditions
Tien, I., “Quantifying Diagnosis of Neurological Conditions,” Scientific Colloquium for Healthcare, Engineering and Medicine, UC Davis Medical Center, Davis, CA, May 2008
Nathaniel Butler, Audra Nemir, and Iris Tien Win NSF Scholarships
Nathaniel Butler and Audra Nemir, graduate students in Environmental Engineering, and Iris Tien, graduating CEE undergraduate entering the Civil Systems program in fall 2008, received National Science Foundation Scholarships. Nathaniel’s adviser is Professor James Hunt. Audra’s adviser is Professor Lisa Alvarez-Cohen. Iris’s adviser with be Professor Steven Glaser.
Congratulations, Nathaniel, Audra, and Iris!
Iris Tien and Jenna Wong Awarded Chancellor’s Fellowships
Two graduating CEE seniors, Iris Tien and Jenna Wong, were awarded Chancellor’s Fellowships. Chancellor’s Fellowships are given to exceptional students of outstanding achievement who are entering a Berkeley doctoral program. Iris will enter the Civil Systems program and Jenna will enter the Structural Engineering, Mechanics and Materials program.
Congratulations, Iris and Jenna!
Quantifying Diagnosis of Neurological Conditions
Tien, I., “Quantifying Diagnosis of Neurological Conditions,” Center for Information Technology Research in the Interest of Society Open House, Berkeley EECS Annual Research Symposium, February 2008
Multidisciplinary Research
The University of California, Berkeley is one of the world’s premier research universities, maintaining a dynamic environment in which top-notch researchers create and freely disseminate the very best scholarly contributions and scientific discoveries. Berkeley is consistently rated among the very best institutions for the quality and breadth of its research enterprise, the scholarly distinction of its faculty, and the excellence of its Ph.D. programs.
Berkeley researchers — many of them leading experts in their fields — are dispersed among more than 130 academic departments and more than 80 interdisciplinary research units. The Berkeley research enterprise spans the full spectrum of the discovery process — from basic research that fuels remarkable, and sometimes unforeseen, breakthroughs to applied, late-stage projects that offer actionable solutions to real-world problems.
Designing for Designers: Lessons Learned from Schools of Architecture
Cranz, G., Wendover, J., Tien, I., Gillem, M., and Norman, J., “Chapter 9: A Post-Occupancy Evaluation of the Temporary Home of the College of Environmental Design on the UC Berkeley Campus,” Designing for Designers: Lessons Learned from Schools of Architecture, Fairchild Books, September 2007
Post-Occupancy Evaluation of the San Francisco Public Library
Cranz, G., and Tien, I., “Post-Occupancy Evaluation of the San Francisco Public Library,” Annual Conference of the Association for Applied and Clinical Sociology, San Jose, CA, October 26-28, 2006
Pop Quiz
If your department were a car, what car would it be?
Iris Tien, CEE sophomore
A pickup truck because it’s very practical and can carry around a bunch of construction materials.
Senior Send-Offs Commence: Academy Orchestra Concert
By Jina Lee | March 8, 2003
Two young talented musicians, both Phillips Academy seniors, captivated the packed audience in the Cochran Chapel last Friday night with their passionate performances. The concert also showcased the results of the hard work and dedication of the orchestras and ensembles over the course of the term. read more…
Welcoming Faces
By Michelle Ku | September 1, 1999
For a new sixth or seventh grader, life at a middle school can be a frightening prospect. But the Cupertino Union School District is taking steps to quell these fears.
This year, all four middle schools are implementing WEB–Welcome Every Body–an orientation program that helps students transition and acclimate themselves from elementary school to the middle school environment. read more…