Energy transmission system for an artificial heart- leakage inductance compensation

A power supply system using a transcutaneous transformer to power an artificial heart through intact skin has been designed. In order to realize both high-voltage gain and minimum circulating current, compensation of leakage inductances on both sides of a transcutaneous transformer is proposed. A frequency region which realizes the robustness against coupling coefficient and load variation is identified. In this region, the converter has inherent advantages such as zerovoltage switching (ZVS) or zero-current switching (ZCS) of the switches, high-voltage gain, minimum circulating current, and high efficiency.

Artificial heart, energy transmission system, high efficiency, high-frequency converter, high-power density, high-voltage gain, inductance compensation, soft-switched converter, transcutaneous transformer, zero-current switching (ZCS), zero-voltage switching (ZVS).

E-paper

E-paper is a revolutionary material that can be used to make next generation electronic displays. It is portable reusable storage and display medium that look like paper but can be repeatedly written one thousands of times. These displays make the beginning of a new area for battery power information applications such as cell phones, pagers, watches and hand-held computers etc.

Two companies are carrying our pioneering works in the field of development of electronic ink and both have developed ingenious methods to produce electronic ink. One is E-ink, a company based at Cambridge, in U.S.A. The other company is Xerox doing research work at the Xerox’s palo Atto Research Centre. Both technologies being developed commercially for electronically configurable paper like displays rely on microscopic beads that change colour in response to the charges on nearby electrodes.

Like traditional paper, E-paper must be lightweight, flexible, glare free and low cost. Research found that in just few years this technology could replace paper in many situations and leading us ink a truly paperless world.

Efficient New Light Unfolds Like Paper

The next time your lamp needs a new light bulb, you might change the lamp shade instead of the light bulb.

New research out of Germany and published in a recent issue of the journal Nature shows that cheap and thin organic light-emitting diodes (OLEDs) can create white light as bright as any compact fluorescent bulb for nearly half the electricity as many compact fluorescent light bulbs.

"This uses cheap, well-known, and well-established materials," said Sebastian Reineke, a coauthor on the paper from the Institut fur Angewandte Photophysik.

"First, we optimized the light that the white OLED emits, and then did some optical tricks to ensure that more of the light was emitted," instead of getting stuck inside the materials themselves.