Lithium Batteries Take to the Road

Hybrid electric cars need much better batteries--and A123, a plucky Massachusetts start-up, says it's got them

12 min read

We knew from the start that we wanted to do auto batteries,” says Ric Fulop, a 30â''something entrepreneur with an electrical engineering degree and a curly mop of brown hair. ”But we also knew that automakers only buy from companies with volume production and real customers.”

It’s a version of the old chicken-and-egg problem that has confronted would-be tech entrepreneurs for decades. But Fulop and company came up with a novel solution: ”We had to do power tools first.”

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"SuperGPS" Accurate to 10 Centimeters or Better

New optical-wireless hybrid makes use of existing telecommunications infrastructure

3 min read
illustration of man looking at giant smart phone with map and red "you are here" symbol
iStock

Modern life now often depends on GPS(short for Global Positioning System), but it can err on the order of meters in cities. Now a new study from a team of Dutch researchers reveals a terrestrial positioning system based on existing telecommunications networks can deliver geolocation info accurate to within 10 centimeters in metropolitan areas.

The scientists detailed their findings 16 November in the journal Nature.

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The Future of the Transistor Is Our Future

Nothing but better devices can tackle humanity’s growing challenges

7 min read
Close-up of a colorful semiconductor wafer held the white gloved hands of a clean room technician.

A 300 millimeter silicon wafer at the Globalfoundries Inc. semiconductor plant in Dresden, Germany, on Thursday, 12 August 2021.

Liesa Johannssen-Koppitz/Bloomberg/Getty Images

This is a guest post in recognition of the 75th anniversary of the invention of the transistor. It is adapted from an essay in the July 2022 IEEE Electron Device Society Newsletter. The views expressed here are solely those of the author and do not represent positions of IEEE Spectrum or the IEEE.

On the 75th anniversary of the invention of the transistor, a device to which I have devoted my entire career, I’d like to answer two questions: Does the world need better transistors? And if so, what will they be like?

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Solving Automotive Design Challenges With Simulation

Learn about low-frequency electromagnetic simulations and see a live demonstration of COMSOL Multiphysics software

1 min read

The development of new hybrid and battery electric vehicles introduces numerous design challenges. Many of these challenges are static or low-frequency electromagnetic by nature, as the devices involved in such designs are much smaller than the operating wavelength. Examples include sensors (such as MEMS sensors), transformers, and motors. Many of these challenges include multiple physics. For instance, sensors activated by acoustic energy as well as heat transfer in electric motors and power electronics combine low-frequency electromagnetic simulations with acoustic and heat transfer simulations, respectively.

Multiphysics simulation makes it possible to account for such phenomena in designs and can provide design engineers with the tools needed for developing products more effectively and optimizing device performance.

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