نتایج جستجو برای: polar map
تعداد نتایج: 238904 فیلتر نتایج به سال:
The structural and optical properties of InN layers grown on GaN/sapphire templates with controlled Ga-/N-polar surfaces are investigated. Raman spectroscopy and XRD reciprocal space map analysis suggest that the InN layers were grown strain free with a high crystal quality. A line shape analysis of the A1(LO) Raman mode yields to a decreasing carrier concentration for the sample grown on Ga-po...
We consider the problem of polar coding for the 2-user discrete memoryless interference channel (DM-IC). Existing schemes are designed according to the original description of the Han-Kobayashi region, which involves two deterministic functions that map auxiliary random variables to channel inputs. Inspired by Chong et al.’s compact description of the Han-Kobayashi region, we propose a novel, s...
Elevations from the Mars Orbiter Laser Altimeter (MOLA) have been used to construct a precise topographic map of the martian north polar region. The northern ice cap has a maximum elevation of 3 kilometers above its surroundings but lies within a 5-kilometer-deep hemispheric depression that is contiguous with the area into which most outflow channels emptied. Polar cap topography displays evide...
BACKGROUND Polar ejection forces have often been hypothesized to guide directional instability of mitotic chromosomes, but a direct link has never been established. This has led, in part, to the resurgence of alternative theories. By taking advantage of extremely precise femtosecond pulsed laser microsurgery, we abruptly alter the magnitude of polar ejection forces by severing vertebrate chromo...
[1] Several chains of receivers, measuring total electron content (TEC) during passes of satellites in the U.S. Navy Ionospheric Measuring System (NIMS), are operated at northern high latitudes by members of the International Ionospheric Tomography Community (IITC). Results are presented here of nearly simultaneous latitude-altitude images of the ionosphere over Scandinavia, Greenland, and Alas...
This study evaluated the diagnostic accuracy of case-based reasoning (CBR) to automatically detect significant coronary artery disease from dipyridamole 201Tl myocardial SPECT perfusion scintigrams. Methods: The study population included 240 patients (182 men, 58 women; mean age 6 SD, 61 6 12 y) on whom coronary angiography and perfusion scintigraphy were performed within 6 6 11 d of each other...
Usznq the recently zntroduced concept of a "dynamzc znverse" of a map, along wzth zts assoczated analog compvtatzonal pnradzgm. we construct contznuous-tame iionlzneor dynamzcal systems whzch produce both regulor and generalazed znverses of ttme-varyzng and $xed matrzccs, as well as polar decomposataons.
Many geographic and economic models of human behavior in a spatial context indicate that the measuring rod of the geodesist or surveyor is less relevant than a scaling of distance in temporal or monetary units. It is necessary to take into account not only the shape of the earth but also the realities of transportation on this surface. Automobiles, trains, airplanes, and other media of transpor...
Inspired by the recent results toward Birkhoff conjecture (a rigidity property of billiards in ellipses), we discuss two properties conics. The first one concerns symmetries an analog polar duality associated with oval, and second circle map oval pencils lines.
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