Results 271 to 280 of about 69,716 (313)

The velocity of dislocations in ice

Philosophical Magazine A, 1991
Abstract The velocities of dislocations in single crystals of ‘pure’ ice between −4 and −39°C have been measured by white radiation topography using synchrotron X-radiation. Dislocations glide on basal planes as straight segments in screw and 60° orientations with velocities directly proportional to stress.
C. Shearwood, R. W. Whitworth
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Kinematics of Ice Skating at Different Velocities

Research Quarterly. American Alliance for Health, Physical Education and Recreation, 1977
The purpose of the study was to quantify and compare the temporal aspects of the ice skating stride performed at three different velocities. Subproblems were (a) to determine how stride rate and stride length are affected by changes in skating velocity and (b) to ascertain the characteristics of the single and double support phase relationship over ...
openaire   +2 more sources

Ice Velocity Effects and Ice Force Scaling

2001
The paper explores the scaling of velocity effects in ice-structure interaction, and attempts to link it to the underlying mechanics through dimensional analysis. It first examines the well-known example of flow in pipes, and uses that analogy to emphasise that too much should not be expected of scaling, and that any attempt to find a universal scaling
Andrew Palmer, Innes Johnston
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Acoustically derived ice-fracture velocity in central Arctic pack ice

The Journal of the Acoustical Society of America, 2000
Sounds radiated by fractures in Arctic ice (called acoustic events) are used to estimate fracture velocity. Both speed and orientation are obtained by measuring Doppler shifts induced by source motion. Data from the SIMI experiment of 1994 in the central Arctic are used in the frequency window 10 to 350 Hz.
C, Stamoulis, I, Dyer
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Directional Solidification with Constant Ice Front Velocity in the Ice‐Templating Process

Advanced Engineering Materials, 2015
An exponential cooling function for the directional solidification of liquids with constant ice front velocities is investigated with respect to an enhanced control over the ice‐templating process. It is mathematically derived and set into relation to other cooling functions found in literature.
Christian Stolze, Tobias Janoschka, Ulrich S. Schubert, Frank A. Müller, Stefan Flauder   +4 more
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Critical impact velocity for ice fragmentation

Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2011
The fragmentation process is a main concern in many engineering applications such as preventing flameouts of aircraft engines. The authors of this article are interested in measuring the critical impact velocity for ice fragmentation. Precisely, a dropweight technique was applied to study the ice ball impacts on glass plates.
Pierrick Guégan, Ramzi Othman, Daniel Lebreton, Franck Pasco, Philippe Villedieu, Jacques Meyssonnier, Sylvie Wintenberger   +6 more
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The Effect of Dry-Ice Pellet Velocity on the Generation of Ice Crystals

Journal of Applied Meteorology, 1963
Abstract The influence of fall velocities of dry-ice pellets on the nucleation of slightly supercooled clouds is discussed and the conditions necessary for the production of ice crystals are examined. A theoretical argument is presented, which suggests that when cloud temperatures are warmer than about −5C, the number of ice crystals produced by a ...
William J. Eadie, Thomas R. Mee
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Velocity of Sliding of an Ice-fall

Nature, 1963
DURING the Nepal Himalaya P-29 (7,835m) Expedition of Osaka University Mountaineering Club, 1961, we had some experience on sliding and avalanches of an active ice-fall; analysing photographs taken by a Canon 2,000mm telephotographic lens from the base camp at 4,400 m high. Fig. 1 is a series of photographs taken at: (a) May 10, 1° 30′ p.m.; (b) May 11,
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Velocity of linear crystallization of ice in macromolecular systems

Cryobiology, 1988
The velocity of ice crystallization in gelled systems was compared with that in solutions of similar macromolecular materials. Neither the constituting material nor the dimensions of the tubes in which the measurements were made influenced the results.
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Radial velocity observations of IC 410

Astrophysics and Space Science, 1980
The velocity of the ionized gas has been obtained at many positions over the H II region IC 410 (S 236) using a pressure scanned Fabry-Perot polychromator/imager. The structure of the object is discussed and its possible association with a nearby supernova remnant discounted.
P. G. Johnson, N. J. White
openaire   +1 more source