To select the best geo-potential model for the determination of Hong Kong and Shenzhen local geoids, three models EGM96, WDM94 and GPM98CR were tested in the region using GPS/leveling data and gravity measurements. The data include GPS/leveling observations at 43 stations, 640 gravity measurements covering the whole territory of Hong Kong, and 62 high precision GPS/leveling observations and 487...

We report a novel transient instability upon temperature quench in weakly ordered block copolymer microphases possessing a soft direction or directions, such as the lamellar and hexagonal cylinder ~HEX! phases. We show that reequilibration of the order parameter is accompanied by transient long wavelength undulation of the layers or cylinders—with an initial wavelength that depends on the depth...

In the present paper, we propose a new pulse measurement methodology based on thermal imaging (contact-free). The method capitalizes both on the thermal undulation produced by the traveling pulse as well as the periodic expansion of the compliant vessel wall. The paper reports experiments on 34 subjects, where it compares the performance of the new pulse measurement method to the one we reporte...

Chronometric geodesy applies general relativity to study the problem of the shape of celestial bodies including the earth, and their gravitational field. The present paper discusses the relativistic problem of construction of a background geometric manifold that is used for describing a reference ellipsoid, geoid, the normal gravity field of the earth and for calculating geoid’s undulation (hei...

Karen E. Daniels, Oliver Brausch, Werner Pesch, Eberhard Bodenschatz Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, NY 14853; Physikalisches Institut der Universität Bayreuth, 95440 Bayreuth, Germany, Current address: Department of Physics, North Carolina State University, Raleigh, NC 27695, Current address: Max Planck Institute for Dynamics and Self-Organization, Göt...

Robotic agents in dynamic environments must sometimes navigate using only their local perceptions. In complex environments, features such as terrain undulation, geometrically complex barriers, and similar obstacles form local maxima and minima that can trap and hinder agents using reactive navigation. Moreover, agents navigating in a purely reactive fashion forget their past discoveries quickly...

2014 Thermal undulations of fluid layers, whose strength depends on layer rigidity, are shown to reduce the effective rigidity. The decrease is calculated in a first-order approximation for weak rippling. The undulation modes are defined as director waves so that the curvatures satisfy the superposition principle. J. Physique 46 (1985) 1263-1268 JUILLET 1985, 1 Classification Physics Abstracts ...