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A New Tool for Secret Agents—And the Rest of Us

12-10-12

Ali Hajimiri, Thomas G. Myers Professor of Electrical Engineering, and Postdoctoral Scholar in Electrical Engineering, Kaushik Sengupta, have developed tiny inexpensive silicon microchips that generate terahertz (THz) waves that fall into a largely untapped region of the electromagnetic spectrum and that can penetrate a host of materials without the ionizing damage of X-rays. When incorporated into handheld devices, the new microchips could enable a broad range of applications in fields ranging from homeland security to wireless communications to health care, and even touchless gaming. "This extraordinary level of creativity, which has enabled imaging in the terahertz frequency range, is very much in line with Caltech's long tradition of innovation in the area of CMOS technology," says Chair Ares Rosakis. "Caltech engineers, like Ali Hajimiri, truly work in an interdisciplinary way to push the boundaries of what is possible." [Caltech Release]

Tags: EE energy research highlights MedE health Ali Hajimiri Kaushik Sengupta

Progress for Paraplegics

10-25-12

Joel W. Burdick, Richard L. and Dorothy M. Hayman Professor of Mechanical Engineering and Bioengineering, and Yu-Chong Tai, Professor of Electrical Engineering and Mechanical Engineering, are developing new technologies to expand their research which has enabled a paraplegic man to stand and move his legs voluntarily. The team has until now used intelligent guesswork to determine which stimuli might work best. But soon, using a new algorithm developed by Professor Burdick, they will be able to rely on a computer to determine the optimum stimulation levels, based on the patient's response to previous stimuli. This would allow patients to go home after the extensive rehab process with a system that could be continually adjusted by computer. [Caltech Release] [ENGenious Progress Report]

Tags: EE research highlights MedE health Yu-Chong Tai MCE Joel Burdick

Seeing Inside Tissue

06-26-12

Changhuei Yang, Professor of Electrical Engineering and Bioengineering, and colleagues Ying Min Wang and Benjamin Judkewitz have developed a new method to focus light inside biological tissue. "It enables the possibilities of doing incision-less surgery," says Professor Yang. "By generating a tight laser-focus spot deep in tissue, we can potentially use that as a laser scalpel that leaves the skin unharmed." [Caltech Press Release]

Tags: EE energy research highlights Changhuei Yang MedE health Ying Min Wang Benjamin Judkewitz

Stimulating Electrode Array Assists Paraplegic Man to Stand and Move Legs Voluntarily

05-20-11

Joel W. Burdick, Professor of Mechanical Engineering and Bioengineering, and colleagues including Yu-Chong Tai, Professor of Electrical Engineering and Mechanical Engineering, have used a stimulating electrode array to assist a paralyzed man to stand, step on a treadmill with assistance, and, over time, to regain voluntary movements of his limbs. Using a combination of experimentation, computational models of the array and spinal cord, and machine-learning algorithms, Professor Burdick and his colleagues are now trying to optimize the stimulation pattern to achieve the best effects, and to improve the design of the electrode array. Further advances in the technology should lead to better control of the stepping and standing processes. [Caltech Press Release]

Tags: EE research highlights MedE health Yu-Chong Tai MCE Joel Burdick

Yu-Chong Tai Receives 2010 Breakthrough Award

10-04-10

Yu-Chong Tai, Professor of Electrical Engineering and Mechanical Engineering, is a recipient of a 2010 Breakthrough Award by Popular Mechanics for his work on an artificial retina. [Popular Mechanics Article]

Tags: EE honors research highlights health Yu-Chong Tai MCE Popular Mechanics

Ali Hajimiri Awarded $6 Million to Develop Self-Healing Circuits

04-08-09

Over the past few decades, the transistors in computer chips have become progressively smaller and faster, allowing upwards of a billion individual transistors to be packed into a single circuit, thus shrinking the size of electronic devices. But these circuits have an intractable design flaw: if just a single transistor fails, the entire circuit also fails. One novel way around the problem is a so-called self-healing circuit. Such circuits are "inspired by biological systems that constantly heal themselves in the presence of random and intentional failures," says Caltech professor Ali Hajimiri.

Tags: EE research highlights MedE Ali Hajimiri

Changhuei Yang Develops "Microscope on a Chip"

07-28-08

Changhuei Yang, Assistant Professor of Electrical Engineering and Bioengineering, and colleagues have turned science fiction into reality with their development of a super-compact high-resolution microscope, small enough to fit on a finger tip. This "microscopic microscope" operates without lenses but has the magnifyingpower of a top-quality optical microscope, can be used in the field to analyze blood samples for malaria or check water supplies for giardia and other pathogens, and can be mass-produced for around $10. [Caltech Press Release]

Tags: EE research highlights Changhuei Yang MedE health

Yu-Chong Tai Discusses the Technology of Retinal Implants in Watson Lecture

03-27-08

In a Watson Lecture entitled The Next-Generation Neural Implant: Let's Start with Retinal Implants, Professor of Electrical Engineering Yu-Chong Tai discusses the technology of retinal implants and recent progress in their development.

Tags: EE MedE health Yu-Chong Tai

Changhuei Yang Invents New Technique That Makes Tissues Transparent

01-28-08

Changhuei Yang, Assistant Professor of Electrical Engineering and Bioengineering, and colleagues, have invented a new technique, turbidity suppression by optical phase conjugation (TSOPC), that counteracts the scattering of light and removes the distortion it creates in images, potentially allowing for light energy to be targeted to devices inside a human body. [Caltech Press Release]

Tags: EE energy Changhuei Yang MedE health