Results 221 to 230 of about 7,201 (251)

Optimizing the Geometry of Pyramidal Antenna Arrays for Hemispherical Scan Coverage

2006 IEEE Antennas and Propagation Society International Symposium, 2006
A new, simple approach for determining the optimal face elevation of pyramidal antenna arrays, used for full or partial hemispherical scan coverage, has been presented. This paper shows that when finite hemisphere radii and pyramidal antenna dimensions are considered, the optimal face elevation remains unchanged, while the maximum scan angle changes ...
I. Khalifa, R. Vaughan
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Practical Geometry Problems: The Case of the Ritzville Pyramids

The Mathematics Teacher, 1993
The wheat-producing country of eastern Washington state furnishes a practical example of an applied geometry problem requiring only a knowledge of the relationship between the parts of a circle and the parts of a right triangle. The solution of this problem is related to several topics in the Curriculum and Evaluation Standards (NCTM 1989) that do not ...
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Nerve cells with irregular processes: Demonstration of anisotropic core geometry of a pyramidal cell

Neuroscience, 1988
An analytical, recursive method has been developed to demonstrate the anisotropic electrotonic geometry of nerve cells containing varicose or spiny dendrites. The procedure has been based on the distribution of the core geometry of dendrites into modules which consist of module elements where the physical length is much shorter than the actual space ...
F, Pongrácz, J, Martos, F, Zsuppán
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Dendritic morphology of pyramidal neurones of the visual cortex of the rat. IV: Electrical geometry

Journal of Comparative Neurology, 1992
AbstractFeatures of the dendritic morphology of pyramidal neurones of the visual cortex of the rat that are relevant to the development of models of their passive electrical geometry were investigated. The sample of 39 neurones that was used came from layers 2/3 and 5. They had been recorded from and injected intracellularly with horseradish peroxidase
A U, Larkman, G, Major, K J, Stratford, J J, Jack   +3 more
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Trigonal Bipyramidal or Square Pyramidal Coordination Geometry? Investigating the Most Potent Geometry for Vanadium Phosphatase Inhibitors

European Journal of Inorganic Chemistry, 2014
AbstractThe five‐coordinate geometry is an important factor in phosphoryl group transfer, particularly for phosphate ester hydrolysis. In the following review we analyze the five‐coordinate geometries for a range of VO4X coordination spheres with regard to their structure from the point of view of square pyramidal or trigonal bipyramidal geometries ...
Debbie C. Crans, Michael L. Tarlton, Craig C. McLauchlan   +2 more
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Optimized Geometries and Pyramidal Inversion in s3l3-Phosphole: A Brief Theoretical Treatment

HETEROCYCLES, 1992
Optimized geometries and total energies for the pyramidal and planar conformations of σ 3 λ 3 -phosphole have been calculated by ab initio methods using the 6-311G * basis set and the GAUSSIAN 86 series of programs.
Alan N. Hughes, Kenneth E. Edgecombe
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Pyramid as test geometry to evaluate formability in incremental forming: Recent results

Journal of Mechanical Science and Technology, 2012
The present work has been undertaken with an objective to fill the gaps of previous studies and to explore guidelines to standardize the test specimen for evaluating formability with a single specimen in single point incremental forming (SPIF). Two candidate geometries for formability testing (i.e.
Ghulam Hussain, Nasir Hayat, Gao Lin
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ChemInform Abstract: Pentacoordinate Bridging Sulfido Ligand in a Square‐Pyramidal Geometry.

Chemischer Informationsdienst, 1986
AbstractThe sulfido Os c1uster(I) reacts with Mo(CO)5(PPh3) at UV irradiation to form the title compound (II) through the formation of a S‐ Wdonor‐acceptor bond.
R. D. ADAMS, J. E. BABIN, K. NATARAJAN
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Pyramid Geometry

Scientific American, 1898
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Critical Investigation of Cheops Pyramid Building in Relation to the Solar Equinox

Journal of Architectural Engineering, 2021
exaly