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New Materials Could Turn Water into the Fuel of the Future

03-06-17

Researchers at Caltech and Lawrence Berkeley National Laboratory have—in just two years—nearly doubled the number of materials known to have potential for use in solar fuels. "The key advance made by the team was to combine the best capabilities enabled by theory and supercomputers with novel high throughput experiments to generate scientific knowledge at an unprecedented rate," says John Gregoire, JCAP thrust coordinator for Photoelectrocatalysis and leader of the High Throughput Experimentation group. [Caltech story]

Tags: APhMS research highlights JCAP John Gregoire

Robot Drone That Mimics Bat Flight

02-01-17

Soon-Jo Chung, Associate Professor of Aerospace and Bren Scholar; Jet Propulsion Laboratory Research Scientist, and colleagues have recreated the key flight mechanisms of bats with unprecedented fidelity in the Bat Bot—a self-contained robotic bat with soft, articulated wings. [Caltech story]

Tags: research highlights GALCIT CMS Soon-Jo Chung

Engineers Create Artificial Skin That "Feels" Temperature Changes

01-30-17

Chiara Daraio, Professor of Mechanical Engineering and Applied Physics, and colleagues have developed an artificial skin capable of detecting temperature changes using a mechanism similar to the one used by the organ that allows pit vipers to sense their prey. [Caltech story]

Tags: APhMS research highlights Chiara Daraio MCE

Taking Flight: Professor Soon-Jo Chung

01-27-17

Soon-Jo Chung, Associate Professor of Aerospace and Bren Scholar; Jet Propulsion Laboratory Research Scientist, has wide research interests ranging from the creation of a robotic bat with flexible wings and realistic flight dynamics to the control of swarms of small satellites to the development of computer-vision-based navigation systems. [Interview with Professor Soon-Jo Chung]

Tags: research highlights GALCIT CMS Soon-Jo Chung

Professor Anatol Roshko Passes Away

01-23-17

Anatol Roshko (MS '47, PhD '52), Theodore von Kármán Professor of Aeronautics, Emeritus, at Caltech, passed away on January 23, 2017. Known for his research in several areas of gas dynamics and fluid mechanics, Professor Roshko made contributions to problems of separated flow, bluff-body aerodynamics, shock-wave boundary-layer interactions, shock-tube technology, and the structure of turbulent shear flows. With pioneering aerodynamics researcher Hans Liepmann, he coauthored the widely used textbook Elements of Gasdynamics, published in 1956. [Caltech story]

Tags: research highlights GALCIT EAS history Anatol Roshko

Tools and Techniques to Track and Study Methane

01-19-17

Methane is less prevalent in the atmosphere than fellow greenhouse gas carbon dioxide (CO2), but it presents more difficult challenges for researchers attempting to study it. Professor Wennberg, is working with colleagues from across Caltech to study methane and its effects on the globe and to pioneer tools and techniques needed to identify, track, and characterize the gas and its sources. One such colleague is Professor Vahala who has paved the way for the miniaturization of high-resolution spectrometers. His new soliton-based system is the basis for a new collaboration with Professor Frankenberg to apply dual-comb spectrometer to methane tracking and analysis. [Caltech story]

Tags: APhMS research highlights ESE Paul Wennberg Kerry Vahala Christian Frankenberg

The Future is Flat (For Lenses)

12-22-16

Andrei Faraon, Assistant Professor of Applied Physics and Materials Science, and colleagues have developed a system of flat optical lenses that can be easily mass-produced and integrated with image sensors, paving the way for cheaper and lighter cameras in everything from cell phones to medical devices. [Caltech story]

Tags: APhMS research highlights MedE Andrei Faraon

Building Better Batteries

12-19-16

Julia R. Greer, Professor of Materials Science and Mechanics, and colleagues have measured for the first time the strength of lithium metal at the nano- and microscale, a discovery with important implications for suppressing dendrite formation and improving lithium-ion batteries.  [Caltech story]

Tags: APhMS research highlights MedE MCE Julia Greer

A Birder in the Hand: Mobile Phone App Can Recognize Birds From Photos

12-14-16

Pietro Perona, Allen E. Puckett Professor of Electrical Engineering, and colleagues have developed the Merlin Bird Photo ID mobile app which uses machine-learning technology to identify hundreds of North American bird species it "sees" in photos. "This app is the culmination of seven years of our students' hard work and is propelled by the tremendous progress that computer-vision and machine-learning scientists are making around the world," says Professor Perona. "A machine that recognizes objects in images, like humans do, was a distant dream when I was a graduate student and now it's finally happening." [Caltech story]

Tags: EE research highlights CMS Pietro Perona

Professor Rolf Sabersky Passes Away

11-10-16

Rolf H. Sabersky, Professor of Mechanical Engineering, Emeritus, passed away on October 24, 2016 at the age of 96.  Professor Sabersky joined the faculty in 1949 having obtained his BS ’42, MS ’43, and PhD ’49 from Caltech in Mechanical Engineering. He became professor emeritus in 1988.  He worked with luminaries throughout his distinguished career including Theodore von Kármán at Aerojet. James Van Allan sought his expertise for the development of the Ajax and Bumblebee rocket programs.  Professor Sabersky made pioneering contributions to our understanding of boiling heat transfer, free convection, granular flows, and indoor air quality. He taught courses in thermodynamics, fluid mechanics, and heat transfer.  He was renowned for his commitment to education, mentoring, and promoting diversity. He was the author of two popular textbooks, Elements of Engineering Thermodynamics, and Fluid Flow: A First course in Fluid Mechanics, which he coauthored with Professor Allan Acosta. He received the Heat Transfer Memorial Award from the American Society of Mechanical Engineers in 1977.

Tags: research highlights MCE EAS history Rolf Sabersky