in this article, the linear array (with 20 elements in the horizontal orientation) of microstrip antenna is examined with horizontal polarization. the set includes three microstrip substrates. there is a power network in two lower substrates and microstrip patches in the upper substrate. excitation of patches has been done as coupled through the power network in two lower substrates. using the ...

Center for Conservation and Evolutionary Genetics, Smithsonian Conservation Biology Institute, Washington, DC 20008, USA (CAB, JEM) Department of Vertebrate Zoology, National Museum of Natural History, Smithsonian Institution, Washington, DC 20013 (JEM) Department of Environmental Science and Public Policy, George Mason University, Fairfax, VA 22030, USA Department of Biology, Colby College, Wa...

A wide band, integrated linear printed antenna array with low sidelobe cosecant square-shaped beam pattern is presented. Array synthesis mainly about the wide shaped coverage, low ripple and sidelobe level (SLL) has been done using the modified least square method by matrix inversion. A printed dipole integrated with wideband balun has been chosen as the array element for wide bandwidth and goo...

Thinned phased array antenna is useful for Radar and satellite communications. Main drawback of phased array antenna is generation of side lobes and grating lobes when the beam is titled from broadside direction toward the end-fire direction. This paper reports the optimization of thinned phased array antenna using genetic algorithm (GA). By varying the tilt angle form broadside direction main ...

This article reports lessons learned from educator need-centered professional development offerings (PD) on accessing and using digital museum resources through the Smithsonian Learning Lab (SLL), a free, interactive platform for discovering resources, creating content with online tools, sharing communities of learners. Since launched in late 2015, Office Education Technology has engaged more t...

The study aims to evaluate the treatment results of perilunate dislocations treated with open reduction and scapholunate ligament (SLL) repair. showed that majority patients had no pain wrist function was restored well. After surgery, (29 out 32) relief from pain. average motion 77.93o extensions, 73.69o flexions, mean grip strength 41.35±5.15 kg. which 93.56% normal side. There 26 excellent, 1...

An adaptive beam former is a device, which is able to steer and modifies an array's beam pattern in order to enhance the reception of a desired signal, while simultaneously suppressing interfering signals through complex weight selection. However, the weight selection is a critical task to get the low Side Lobe Level (SLL) and Low Beam Width. One needs to have a low SLL and low beam width to re...

The concept of placing enormous Solar Power Satellite (SPS) systems in space represents one of a handful of new technological options that might provide large scale, environmentally clean base load power to terrestrial markets. Recent advances in space exploration have shown a great need for antennas with high resolution, high gain and low side lobe level (SLL). The last characteristic is of pa...

Identifying the molecular and genetic basis of resistance to Sclerotinia stem rot (Sclerotinia sclerotiorum) is critical for developing long-term cost-effective management this disease in rapeseed/canola (Brassica napus). Current cultural or chemical options provide, at best, only partial and/or sporadic control. Towards this, a B. napus breeding population (Mystic x Rainbow), including parents...

OBJECTIVE The present study was designed to derive the normal limits of a new ECG lead system aimed at enhancing the amplitude of atrial potentials through the use of bipolar chest leads. METHODS Sixty healthy male subjects, mean age 38.85±8.76 years (range 25 to 58 years) were included in this study. In addition to a standard 12-lead ECG, a modified limb lead (MLL) ECG was recorded for 60 se...