Monday, July 15, 2002


July 15, 2002









COVER STORY:
RAJ S. RANGARAJAN ON HITTEN ZAVERI, Associate Research Scientist, Department of Neurology, Yale

AMAZICANS
Backing The Brains


The man sails, scuba-dives, windsurfs and hikes. He is also involved in social service. And 9 to 5? Well, he studies brain disorders at Yale University. Meet Dr Hitten Zaveri, born in Dar-es-Salaam, Tanzania, student of St Peters School in Panchgani, Maharashtra, and the University of Michigan, where he piled up degrees: a BS and MS in electrical engineering, a BS in computer engineering, an MS and PhD in bioengineering.

Epilepsy, a brain disorder, affects approximately 1 per cent of the world's population. With no cure for it yet, the primary treatment options are the use of anti-epileptic drugs or epilepsy surgery. Zaveri studies why an abnormality occurs in the functioning of a person's brain, how it gets transmitted to other parts of the brain, and how and why it terminates. Says Zaveri, "We study brain pathways to understand these aberrant signals and whether an implantable device can be created to control them."

In short, a pacemaker for the brain. But is it feasible? Zaveri is confident: "Yes, there is a fair amount of promise in the field. Recently, there has been increased interest in the control of seizures through seizure prediction. For years there has been a belief that seizures could be predicted. Our patients, on occasion, tell us they can anticipate when they are at greater risk for seizures."

An associate research scientist with the Department of Neurology at Yale University, Zaveri has had extensive training in electrical, computer and biomedical engineering and since graduate school has sought to bring this expertise to fully bear upon the study of brain function and dysfunction.

When not studying the brain, Zaveri, 41, is active in aquatics and volunteer activity. He raises funds and awareness for basic education of underprivileged children in India. He has been wind-surfing for two years and sails a 420 boat at the Yale Corinthian Yacht Club for recreation. Zaveri has also hiked part of the Appalachian trail in New England as well as the foothills of the Western Ghats in Maharashtra, apart from scuba-diving off the coast of Massachusetts and the Cayman Islands.

Portable Power, July 15, 2002



COVER STORY
Raj S. Rangarajan on AMIT MEHRA, Chief Engineer, Turbine Engine Research, D-Star



AMAZICANS
Portable Power

Imagine a jet engine in your laptop computer that ran for weeks without being recharged. Imagine producing energy on a small scale." That was how Dr Amit Mehra described his doctoral research last year while winning first place at the Merrill Lynch Innovation Grants Competition that recognises original academic ideas likely to succeed in the marketplace. Mehra developed a working model of a two-centimetre-sized jet engine combustion chamber that could eventually be used to convert chemical energy of fuel into electricity for portable electronic devices. "The portable power unleashed by this conversion," Mehra says, "could be used in numerous industrial and consumer products."

Mehra, who graduated with undergraduate and doctoral degrees from Caltech in California and MIT, majoring in aeronautics and astronautics, worked with a team of top MIT engineers. This team hopes to one day take large engines such as the ones used in aircraft and try to miniaturise them to fit in one's palm. The long-term picture is to make a jet engine-powered battery that would create more energy than regular batteries used in portable electronic devices.

Currently chief engineer of turbine engine research at D-Star Engineering, an aerospace research and development company in Washington, DC, Mehra has published several papers on micro-combustion, fluid dynamics and silicon fabrication. His present focus is on developing similar miniature devices for high-energy release using chemical fuels.

When he is not busy researching jet engines, Mehra, 29, flies a single-engine Piper Tomahawk for fun. This eligible bachelor also enjoys his golf and boasts a high handicap. His ex-merchant navy father Jeet Mehra and his mother Ashi live in Delhi.