industrial structure, technology and energy and environmental policy. Deregulation in the different markets is moving foreward. The restructuring of the petroleum and energy industry the last couple of years has been fundamental. Ecommerce will definitivly influence the energy industry and trade patterns. Technology offers significantly increased efficiencies for all energy sources. On the glob...

Due to the progression growth of multiservice wireless communication systems in a single device, multiband bandpass filter has attract great attention end user. Therefore, is crucial component transceivers which can support multiple services one device. This paper presents design dual-band at 2.4 GHz and 3.5 for WLAN WiMAX applications. Firstly, wideband designed center frequency 3 based on qua...

Single crystals of D-ribulose-l,&diphosphate carboxylase from tobacco leaves, Nicotiama tabacwn (variety Turkish Samsun), have been examined by X-ray diffraction, electron microscopy, and optical diffraction. Twelve molecules are loosely packed into a body-centered cubic unit cell, space group 14r32 with cell dimension a = 383 A. The asymmetric unit is one quarter of a molecule, and the minimum...

In most animals, the visual system plays a central role in locomotor guidance. Here, we examined the functional organization of visuomotor reflexes in the fruit fly, Drosophila, using an electronic flight simulator. Flies exhibit powerful avoidance responses to visual expansion centered laterally. The amplitude of these expansion responses is three times larger than those generated by image rot...

Historically, general practitioners provided first-contact care in the United States. Today, however, only 42 percent of the 354 million annual visits for acute care--treatment for newly arising health problems--are made to patients' personal physicians. The rest are made to emergency departments (28 percent), specialists (20 percent), or outpatient departments (7 percent). Although fewer than ...