نتایج جستجو برای: focusing
تعداد نتایج: 97844 فیلتر نتایج به سال:
We review recent progress in understanding phenomena like crumpling, in which elastic membranes or sheets subject to structureless forces develop sharply curved structure over a small fraction of their surface. In the limit of zero thickness these structures become singular. After reviewing several related phenomena we note the physical elements that give rise to the singular behavior: elastici...
Introduction: An Overview of the Medicaid Program T he Medicaid program plays a key role in ensuring access to medical and long-term care services for millions of Americans. Medicaid, a jointly funded federal–state health care program for low-income individuals, covered more than 47 million people in 2002—one of every seven Americans. 2, 3 With financial assistance from the federal government, ...
We present numerical results for a chemical reaction of colloidal particles which are transported by a laminar fluid and are focused by periodic obstacles in such a way that the two components are well mixed and consequently the chemical reaction is speeded up. The roles of the various system parameters (diffusion coefficients, reaction rate, and obstacles sizes) are studied. We show that focus...
We present an operable definition of focus which is argued to be of a cognito-pragmatic nature and explore how it is determined in discourse in a formalized manner. For this purpose, a file card model of discourse model and knowledge store is introduced enabling the decomposition and formal representation of its determination process as a programmable algorithm (FDA). Interdisciplinary evidence...
1DESY, Notkestr. 85, 22607 Hamburg, Germany, 2CFEL at DESY, Notkestr. 85, 22607 Hamburg, Germany, 3Institute of Experimental Physics, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany, 4SLAC National Accelerator Laboratory, 2575 Sand Hill Road MS 29, Menlo Park, CA 94025, USA, 5Faculty of Physics, University of Bialystok, ul. Lipowa 41, 15-424 Bialystok, Poland, 6European XFEL...
Some programming language features (coercions, type-classes, implicits) rely on inferring a part of the code that is determined by its usage context. In order to better understand the theoretical underpinnings of this mechanism, we ask: when is it the case that there is a unique program that could have been guessed, or in other words that all possible guesses result in equivalent program fragme...
The nonlinear coupling of two scalar nonlinear Schrr odinger (NLS) elds results in non-focusing instabilities that exist independently of the well-known modulational instability of the focusing NLS equation. The focusing versus defocusing behavior of scalar NLS elds is a well-known model for the corresponding behavior of pulse transmission in optical bers in the anomalous (focusing) versus norm...
The main problem with Model-Based Diagnosis is its computational complexity. Each of its fundamental steps, prediction, conflict recognition and candidate generation, exhibits a combinatorial explosion for large devices. The algorithm we present generates diagnoses in an incremental way, starting from all those with the same least cardinality. Provided the reliability of the system’s components...
Tissues such as skin, fat or cuticle are non-transparent because inhomogeneities in the tissue scatter light. We demonstrate experimentally that light can be focused through turbid layers of living tissue, in spite of scattering. Our method is based on the fact that coherent light forms an interference pattern, even after hundreds of scattering events. By spatially shaping the wavefront of the ...
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