News & Events

Headlines

Material Inspired by Chain Mail Transforms from Flexible to Rigid on Command

08-12-21

Engineers at Caltech and JPL have developed a material inspired by chain mail that can transform from a foldable, fluid-like state into specific solid shapes under pressure. "We wanted to make materials that can change stiffness on command," says Chiara Daraio, G. Bradford Jones Professor of Mechanical Engineering and Applied Physics. "We'd like to create a fabric that goes from soft and foldable to rigid and load-bearing in a controllable way." To explore what materials would work best, Daraio, together with former Caltech postdoctoral researcher Yifan Wang and former Caltech graduate student Liuchi Li (PhD '19) as co-lead authors of the Nature paper, designed a number of configurations of linked particles, from linking rings to linking cubes to linking octahedrons (which resemble two pyramids connected at the base). The materials were 3-D printed out of polymers and even metals, with help from Douglas Hofmann, principal scientist at JPL, which Caltech manages for NASA. These configurations were then simulated in a computer with a model from the group of José E. Andrade, the George W. Housner Professor of Civil and Mechanical Engineering and Caltech's resident expert in the modeling of granular materials. [Caltech story]

Tags: APhMS Chiara Daraio MCE Jose Andrade KNI Yifan Wang Liuchi Li

Joseph Falson Named Moore Fellow

08-11-21

Joseph Falson, Assistant Professor of Materials Science, has been named as a 2021 Fellow in Materials Synthesis by the Gordon and Betty Moore Foundation. Falson's grant will enable him to pursue methods for growing highly pure crystals of new materials. He plans to build a custom piece of equipment with an ultra-high vacuum chamber corrosive materials that also offers access to the materials so that sensitive experiments may be conducted on them. "Broadly, the field is looking for fundamentally new types of materials that show some type of complex functionality," says Falson. [Caltech story]

Tags: APhMS honors KNI Joseph Falson

Professor Pellegrino Awarded Torroja Medal

08-09-21

Sergio Pellegrino, Joyce and Kent Kresa Professor of Aerospace and Civil Engineering; Jet Propulsion Laboratory Senior Research Scientist; Co-Director, Space-Based Solar Power Project, has been awarded the Torroja Medal from the International Association of Shell and Spatial Structures (IASS). The engraved medal represents the highest individual recognition given by the Association to members or nonmembers of the Association in recognition of outstanding and distinguished contributions to design, construction or research of shell and/or spatial structures. [Past recipients]

Tags: honors GALCIT MCE Sergio Pellegrino

Wei Gao Receives Pittsburgh Conference Achievement Award

07-07-21

Wei Gao, Assistant Professor of Medical Engineering, has received the Pittsburgh Conference Achievement Award (PCAA). The Pittsburgh Conference Achievement Award is given annually to a researcher who has made a significant and independent impact in the area of analytical chemistry within the first ten years after his or her doctoral degree. [Past Recipients]

Tags: APhMS honors MedE KNI Wei Gao

Laura Lewis Wins Dual Computer Science Awards

06-30-21

Undergraduate student Laura Lewis, advised by Elena Mantovan, Professor of Mathematics; Claire Ralph, Lecturer in Computing and Mathematical Sciences; Director, Career Development Center; and Thomas Vidick, Professor of Computing and Mathematical Sciences, has won both the qBraid Technical Challenge in the Quantum Coalition Hack and the National Center for Women and Information Technology (NCWIT) 2021 Collegiate Award. [Caltech story]

Tags: honors CMS Thomas Vidick Claire Ralph Laura Lewis Elena Mantovan

Thomas Vidick Named Simons Investigator

06-28-21

Thomas Vidick, Professor of Computing and Mathematical Sciences, has been named a Simons Investigator by the Simons Foundation. The intent of the Simons Investigators in Mathematics, Physics, Astrophysics and Computer Science programs is to support outstanding theoretical scientists in their most productive years, when they are establishing creative new research directions. Awardees are outstanding theoretical scientists who receive a stable base of research support from the foundation, enabling them to undertake the long-term study of fundamental questions. [Past Recipients]

Tags: honors CMS Thomas Vidick

Jennifer Sun Receives Best Student Paper Award

06-28-21

Jennifer Sun, graduate student in Computing and Mathematical Sciences, has won Best Student Paper at CVPR 2021. The paper, titled "Task Programming: Learning Data Efficient Behavior Representations," studies how to use programmatic weak supervision to reduce the need for supervised labels.

Tags: honors CMS Jennifer Sun

Nano-Architected Material Resists Impact Better Than Kevlar

06-25-21

Julia R. Greer, Ruben F. and Donna Mettler Professor of Materials Science, Mechanics and Medical Engineering; Fletcher Jones Foundation Director of the Kavli Nanoscience Institute, has developed a nano-architected material made from tiny carbon struts that is, pound for pound, more effective at stopping a projectile than Kevlar, a material commonly used in personal protective gear. "The knowledge from this work could provide design principles for ultra-lightweight impact resistant materials for use in efficient armor materials, protective coatings, and blast-resistant shields desirable in defense and space applications," says Greer. [Caltech story]

Tags: APhMS research highlights MedE MCE Julia Greer KNI

New Algorithm Helps Autonomous Vehicles Find Themselves, Summer or Winter

06-24-21

Without GPS, autonomous systems get lost easily. Now a new algorithm developed at Caltech allows autonomous systems to recognize where they are simply by looking at the terrain around them—and for the first time, the technology works regardless of seasonal changes to that terrain. The general process, known as visual terrain-relative navigation (VTRN), was first developed in the 1960s. By comparing nearby terrain to high-resolution satellite images, autonomous systems can locate themselves. The problem is that, in order for it to work, the current generation of VTRN requires that the terrain it is looking at closely matches the images in its database. To overcome this challenge, Anthony Fragoso, Lecturer in Aerospace; Staff Scientist, Connor Lee, Graduate student in Aerospace, Austin McCoy, Undergraduate, and Soon-Jo Chung, Bren Professor of Aerospace and Control and Dynamical Systems and research scientist at JPL, turned to deep learning and artificial intelligence (AI) to remove seasonal content that hinders current VTRN systems. [Caltech story]

Tags: research highlights GALCIT MCE CMS Soon-Jo Chung Anthony Fragoso Connor Lee Austin McCoy

Harnessing Sound for Health: A Conversation with Tim Colonius

06-18-21

When a person develops a kidney stone or a gall stone—hard accumulations of minerals and other compounds created by the body—they can experience a great deal of pain and discomfort. Lithotripsy is the practice of breaking gall or kidney stones into small pieces within the body using shockwaves produced by a machine called a lithotripter. A new form of lithotripsy has been under development with the help of Tim Colonius, Frank and Ora Lee Marble Professor of Mechanical Engineering. [Caltech story]

Tags: research highlights MCE Tim Colonius