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11.
Jean Nahmias Hervé Téphany Philippe Méjanelle 《Journal of colloid and interface science》1997,190(2):497
Using a rotating magnet device, we observe the noncoalescence of droplets of certain liquids slightly put in contact with the surface of the same liquid. The droplets go into the vortex and coalesce, the resulting drop staying in equilibrium in this position. If the rotation of the liquid is stopped, the drop rests at the surface for more than 20 s, as if it were immiscible, without any relative motion. 相似文献
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14.
Demetris P. Papahatjis Dr. Victoria R. Nahmias Spyros P. Nikas Dr. Marion Schimpgen Alexandros Makriyannis 《Chemistry (Weinheim an der Bergstrasse, Germany)》2010,16(13):4091-4099
Two novel methyl‐substituted arachidonic acid derivatives were prepared in an enantioselective manner from commercially available chiral building blocks, and were found to be excellent templates for the development of (13S)‐methyl‐substituted anandamide analogues. One of the compounds synthesized, namely, (13S,5Z,8Z,11Z,14Z)‐13‐methyl‐eicosa‐5,8,11,14‐tetraenoic acid N‐(2‐hydroxyethyl)amide, is an endocannabinoid analogue with remarkably high affinity for the CB1 cannabinoid receptor. 相似文献
15.
We consider a two-chain exponential queueing network with a large number of customers that consists of one infinite-server (IS) station and two processor-sharing (PS) or FCFS single-server stations. The asymptotic behavior of the partition function is studied for such a network when one or both PS (FCFS) nodes are heavily loaded. The results are derived using methods of multidimensional complex analysis (the theory of homologies and residues) and the saddle-point method. 相似文献
16.
Yaakov Ben Natan Yoav Benyamini H»kan Hendenmalm Yitzhak Weit 《Arkiv f?r Matematik》1996,34(2):199-224
Our main result gives necessary and sufficient conditions, in terms of Fourier transforms, for an ideal in the convolution
algebra of spherical integrable functions on the (conformal) automorphism group of the unit disk to be dense, or to have as
closure the closed ideal of functions with integral zero. This is then used to prove a generalization of Furstenberg's theorem,
which characterizes harmonic functions on the unit disk by a mean value property, and a “two circles” Morera type theorem
(earlier announced by Agranovskii).
The second author's work was partially supported by the fund for the promotion of research at the Technion-Israel Institute
of Technology. The third author's work was partially supported by the Swedish Natural Science Research Council, and by the
1992 Wallenberg Prize from the Swedish Mathematical Society. 相似文献
17.
Yaakov S. Kupitz 《Discrete Mathematics》2008,308(23):5485-5498
We give sufficient (and necessary) conditions of local character ensuring that a geometric graph is the 1-skeleton of an unstacked triangulation of a simple polygon. 相似文献
18.
Usually the Lorentz transformations are derived from the conservation of the spacetime interval. We propose here a way of obtaining spacetime transformations between two inertial frames directly from symmetry, the isotropy of the space and principle of relativity. The transformation is uniquely defined except for a constant e, that depends only on the process of synchronization of clocks inside each system. Relativistic velocity addition is obtained, and it is shown that the set of velocities is a bounded symmetric domain. If e=0, Galilean transformations are obtained. If e>0, the speed 1/e and a spacetime interval are conserved. By assuming constancy of the speed of light, we get e=1/c
2 and the transformation between the frames becomes the Lorentz transformation. If e<0, a proper speed and a Hilbertian norm are conserved. 相似文献
19.
This Letter reports on the experimental implementation of the quantum baker's map via a three bit nuclear magnetic resonance quantum information processor. The experiments tested the sensitivity of the quantum chaotic map to perturbations. In the first experiment, the map was iterated forward and then backward to provide benchmarks for intrinsic errors and decoherence. In the second set of experiments, the least significant qubit was perturbed in between the iterations to test the sensitivity of the quantum chaotic map to controlled perturbations. These experiments can be used to investigate existing theoretical predictions for quantum chaotic dynamics. 相似文献
20.
We identify a border between regular and chaotic quantum dynamics. The border is characterized by a power-law decrease in the overlap between a state evolved under chaotic dynamics and the same state evolved under a slightly perturbed dynamics. For example, the overlap decay for the quantum kicked top is well fitted with [1+(q-1)(t/tau)2](1/(1-q)) (with the nonextensive entropic index q and tau depending on perturbation strength) in the region preceding the emergence of quantum interference effects. This region corresponds to the edge of chaos for the classical map from which the quantum chaotic dynamics is derived. 相似文献