Results 261 to 270 of about 5,957,804 (303)
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Trapped Surfaces and the Development of Singularities
Journal of Mathematical Physics, 1971The study of singularities in general relativity was given a strong impetus by a topological approach due to Penrose and others, and powerful theorems concerning their existence have been developed. In particular a theorem by Penrose states that under certain conditions the existence of a trapped surface in a space-time guarantees that singularities ...
David Walter Pajerski, Ezra T. Newman
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Surface Dissolution and the Development of Scallops
Chemical Engineering Communications, 2005Abstract Flow-assisted corrosion (FAC) is a significant problem with carbon steel components exposed to rapidly moving water or water/steam mixtures. Such components often develop distinctive patterns of surface damage called scalloping, so to gain further insight into FAC it is of interest to understand the formation and significance of scallops ...
Villien, Benoit +2 more
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Recent Developments in the Contouring of Surfaces
Contouring of surfaces covers both metrology measurements and determination of displacements. There are a variety of scientific methods and corresponding devices used in contouring problems. Optical methods of contouring (OMC) have been proven to compete with the high precision and accuracy of Coordinate Measurement Machines (CMM).Sciammarella CA +3 more
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Role of the surface electrocardiogram in developing countries
Journal of Electrocardiology, 2010The surface electrocardiogram (ECG) is a basic cardiac investigation delivering information not only regarding heart rhythm but also regarding ischemic disease, effects of hypertension, congenital syndromes, and cardiomyopathies. These may determine decisions regarding follow-up investigations or treatment.
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The Development of Glaciokarstic Surfaces
2018This chapter deals with the geomorphic evolution of glaciokarst. The ways of surface denudation are presented on bare karst and soil-covered karst, on concealed karst and allogenic karst, then in light of them, the landscape evolution in the area of various glacial erosional surfaces and landforms will be outlined.
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Development of Surface Potential on the Fresh Surface of NaCl Crystals
Journal of the Physical Society of Japan, 1994Evolution of the surface potential is calculated for NaCl crystals both in the intrinsic and in the extrinsic ranges. It is shown that its time constant is approximately given by the time for the faster species to move the Debye length by diffusion and the contribution of the slower species is negligible.
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On the Development of Shear Surface Roughness
Journal of Geophysical Research: Solid Earth, 2019AbstractFrom deformed quartzites in the Singhbhum Shear Zone, eastern India, we report shear fractures of varying surface roughness: very smooth, containing no lineation to strongly rough with prominent slickenlines. We reproduced them in analogue laboratory experiments, which suggest that the modes of shear failure (brittle versus ductile) and the ...
Manaska Mukhopadhyay +3 more
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The Development Of Asphalt Surfacing Properties
2014This paper considers how the development of asphalt surfacing properties can be predicted in the laboratory. The research has been prompted by the ideals of sustainability coupled with the practical issues being faced by many countries around the world of how to improve, better manage and maintain their highway network.
Woodward, David +3 more
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Postnatal Development of Vestibular Receptor Surfaces in the Rat
Acta Oto-Laryngologica, 1986The development of vestibular receptor surfaces was studied during the postnatal period in the rat on the 1st, 7th, 13th, 32nd and 75th days after birth. Cristae and utricles increase and change their shapes, up to day 13 for the cristae and day 32 for the utricles. Cristae hair bundles are less developed than those of the utricles on the 1st day after
C, Dechesne, J P, Mbiene, A, Sans
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Development of the autonomous surface craft "ACES"
Oceans '97. MTS/IEEE Conference Proceedings, 2002At the MIT Sea Grant College Program, Autonomous Surface Craft (ASCs) have been under development since 1993. An ASC is a small vessel outfitted with navigation and control systems which permit it to carry out functions autonomously. The first ASC developed was the ASC ARTEMIS, which was used to study command and control architectures, navigation ...
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