New Trends in the Insulation Technology of Rotating High Voltage Machines

INTRODUCTION:
    The driving force of material and process development in the insulation technology of rotating high voltage machines has changed in the last five to ten years. Being mainly technology driven in the past, cost has become more and more the determining factor in the industry. Improvements in products or processing are only accepted if they reduce overall cost. On the other hand, high voltage motors and generators are long-life capital goods and a reduction in reliability cannot be tolerated. Any development of new insulating materials has to reflect these facts to be successful in the market.

Humidity changes color of birds' feathers, biologists discover

Tree swallows' iridescent feathers change from blue-green to muted yellow when exposed to humidity. The plumage reverses to previous color tones as humidity decreases.
    This discovery by Chad Eliason, a University of Akron integrated bioscience Ph.D. program student, and Dr. Matthew Shawkey, assistant professor of biology and integrated bioscience, is published in the Sept. 27 issue of Optics Express, the international journal of optics.
    The finding has implications ranging from technology (color and vapor sensors) to biology (mate choice), according to the researchers.

Gravitational interaction of antimatter

Abstract:
    This paper formulates gravitational interaction between matter and antimatter by applying the referenced model.
    Until now, there is no experimental evidence on the gravitational behaviour of antimatter. While we may be confident that antimatter attracts antimatter, we do not know anything on the interaction between matter and antimatter. We investigate this issue on theoretical grounds. Starting from the CPT invariance of physical laws, we transform matter into antimatter in the equations of both electrodynamics and gravitation. In the former case, the result is the well-known change of sign of the electric charge. In the latter, we find that the gravitational interaction between matter and antimatter is a mutual repulsion. This result supports cosmological models attempting to explain the Universe accelerated expansion in terms of a matter-antimatter symmetry.

THE WIRELESS TRANSMISSION OF ELECTRICAL ENERGY

Introduction:
    It is possible that Nikola Tesla is best known for his remarkable statements regarding the wireless transmission of electrical power. His first efforts towards this end started in 1891 and were intended to simply "disturb the electrical equilibrium in the nearby portions of the earth... to bring into operation in any way some instrument." In other words the object of his experiments was simply to produce effects locally and detect them at a distance. By 1899 the electrical potential of his transmitter had increased to the point that more room was needed for the sake of safety. This and other considerations led him to temporarily shift his wireless experiments to a location just outside of Colorado Springs.

ANDROID

Introducing Android

    The mobile development community is at a tipping point. Mobile users demand more choice, more opportunities to customize their phones, and more functionality. Mobile operators want to provide value-added content to their subscribers in a manageable and

lucrative way. Mobile developers want he freedom to develop the powerful mobile applications users demand with minimal roadblocks to success. Finally, handset manufacturers want a stable, secure, and affordable platform to power their devices. Upuntil now single mobile platform has adequately addressed the needs of all the parties.

    Enter Android, which is a potential game-changer for the mobile development community. An innovative and open platform,Android is well positioned to address the growing needs of the mobile marketplace.

    This chapter explains what Android is, how and why it was developed, and where the platform fits in to the established mobile marketplace.