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Undergraduate Students Win International Data Science Competition

04-19-19

Undergraduate students Hongsen Qin, Emma Qian, Thomas Hoffmann, and Alexander Zlokapa (advised by Professors Aaron Ames, Erik Winfree, Jonathan Katz, Maria Spiropulu, and Yaser Abu-Mostafa) have won the Citadel Data Open International Data Science Competition. This winning team chose to investigate the optimal way to spend $1 billion to save lives from malaria and sanitation-related diseases, allocating funds for different prevention methods and optimizing budget breakdowns country by country. To quantify the socioeconomic impacts of their policy proposal, they modeled a variety of aspects from mosquito feeding cycles to climate change using techniques ranging from causal discovery methods to interpretable machine learning. The Caltech team was among 24 teams that were evaluated and questioned by a panel of experts including the former Chief Scientist of AI at Microsoft, a Princeton professor, and the chief of equities at Citadel. The Caltech team was chosen as the first place winner based on the depth, rigor, and comprehensiveness of their analysis.

Tags: EE honors CMS Erik Winfree Yaser Abu-Mostafa Aaron Ames Hongsen Qin Emma Qian Thomas Hoffmann Alexander Zlokapa

Katie Bouman Joins EAS and CMS

04-11-19

Congratulations to the entire Event Horizon Telescope team, and especially to Dr. Katie Bouman who is joining the Engineering and Applied Science (EAS) Division in June as assistant professor of computing and mathematical sciences (CMS). Currently, Caltech and CO Architects are working with her to design and construct a unique laboratory that will facilitate her work in computational imaging. The laboratory is the first of its kind and is designed for her to conduct experimental work in conjunction with her computational approaches – making it possible, for instance, to observe phenomena previously difficult or impossible to measure. The black hole imaging is one spectacular example of how Professor Bouman’s algorithms are advancing our knowledge of the world; she has also developed algorithms that let us “see around corners” and detect material properties (such as stiffness and dampness) via imaging. In her work, Bouman has also developed methods to combine information from both imaging as well as acoustic systems to analyze sub-pixel scale vibrations of otherwise seemingly still objects. As a result, relatively inexpensive cameras, combined with powerful algorithms, are an increasingly attractive alternative to complex and expensive laser-based systems to sense “invisible” attributes of a material. [Caltech story - How to Take a Picture of a Black Hole]

Tags: research highlights CMS Katie Bouman

Scarcity in the Modern World

04-08-19

A new book, Scarcity in the Modern World, examines how concerns about the scarcity of environmental resources such as water, food, energy and materials have developed, and subsequently been managed, from the 18th to the 21st century. The book is co-edited by Dr. Neil Fromer, Professor John Brewer, and their colleagues from University of Chicago and University of London.  It brings together scholars from a variety of academic disciplines to provide an innovative multi-disciplinary perspective that corrects previous scholarship which has discussed scientific and cultural issues separately. Other Caltech contributors to the book include Professors David Rutledge and Jean-Laurent Rosenthal. [Learn more]

Tags: EE David Rutledge Neil Fromer John Brewer Jean-Laurent Rosenthal

Joel A. Tropp Named 2019 SIAM Fellow

04-03-19

Joel A. Tropp, Steele Family Professor of Applied and Computational Mathematics has been elected to the 2019 class of Society for Industrial and Applied Mathematics (SIAM) fellows. He was nominated for his exemplary research as well as outstanding service to the community. He is being recognized for contributions to signal processing, data analysis and randomized linear algebra.

Tags: honors CMS Joel Tropp

Laser Technology Helps Researchers Scrutinize Cancer Cells

04-01-19

Lihong Wang, Bren Professor of Medical Engineering and Electrical Engineering, and colleagues are using photoacoustic microscopy (PAM) to improve on an existing technology for measuring the oxygen-consumption rate (OCR). This new method allows the researchers to determine how oxygenated a sample of blood is by "listening" to the sound it makes when illuminated by the laser. Professor Wang calls this single-cell metabolic photoacoustic microscopy, or SCM-PAM. [Caltech story]

Tags: EE research highlights MedE Lihong Wang

Computer Scientists Create Reprogrammable Molecular Computing System

03-20-19

Erik Winfree, Professor of Computer Science, Computation and Neural Systems, and Bioengineering, and colleagues have designed DNA molecules that can carry out reprogrammable computations, for the first time creating so-called algorithmic self-assembly in which the same "hardware" can be configured to run different "software." Although DNA computers have the potential to perform more complex computations than the ones featured in the Nature paper, Professor Winfree cautions that one should not expect them to start replacing the standard silicon microchip computers. That is not the point of this research. "These are rudimentary computations, but they have the power to teach us more about how simple molecular processes like self-assembly can encode information and carry out algorithms. Biology is proof that chemistry is inherently information-based and can store information that can direct algorithmic behavior at the molecular level," he says. [Caltech story]

Tags: research highlights CMS Erik Winfree

Levitating Objects with Light

03-18-19

Ognjen Ilic, postdoctoral scholar in Professor Harry Atwater’s laboratory, and colleagues have designed a way to levitate and propel objects using only light, by creating specific nanoscale patterning on the objects' surfaces. "We have come up with a method that could levitate macroscopic objects," says Professor Atwater, who is also the director of the Joint Center for Artificial Photosynthesis. "There is an audaciously interesting application to use this technique as a means for propulsion of a new generation of spacecraft. We're a long way from actually doing that, but we are in the process of testing out the principles." [Caltech story]

Tags: APhMS research highlights Harry Atwater postdocs Ognjen Ilic

Teaching Coding in Elementary Schools

03-15-19

On Friday afternoons, Caltech computer science students visit public schools in Pasadena to help third-, fourth-, and fifth-graders learn to code. Their work is part of a recently introduced course in which Caltech undergrads study and practice strategies for teaching programming to children. “We start with basic concepts and, by the end, students have coded their own games in Scratch [a visual programming language developed for children],” says Caltech senior Anna Resnick, who helps lead the class as a teaching assistant. “A few have even told us they want to be programmers someday.” [Caltech story]

Tags: CMS teaching Anna Resnick Claire Ralph

Robots Make a Big Splash in Annual Engineering Competition

03-15-19

On Tuesday Milikan Pond was transformed into an aquatic arena where amphibious robots duked it out in Caltech's annual ME72 design competition. The competition serves as the final exam for the ME72 Engineering Design Laboratory course, which is taught by Michael Mello (PhD '12). The event challenged four student teams to build three robots each. The robots had to be capable of traversing both land and water and collecting floating balls. [Caltech story & videos]

Tags: MCE alumni ME 72 Michael Mello

Best Paper Award

03-13-19

Professor Pietro Perona along with Caltech alumni David Hall and Steve Branson have won the 2018 U. V. Helava Best Paper Award from the ISPRS Journal of Photogrammetry and Remote Sensing. Their paper “From Google Maps to a fine-grained catalog of street trees” was selected for the award. The jury described the work in the paper as “innovative, and applicable for large areas of tree classification and inventories. The developed methodology would affect practices of urban tree management globally.” [Read the paper]

Tags: EE honors Pietro Perona alumni postdocs David Hall Steve Branson