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Data networks

by L. Verger G, E. Gros D'aillon G, P. Major H, G. Németh H , 1992
"... a b s t r a c t In this paper we illustrate the core technologies at the basis of the European SPADnet project (www. spadnet.eu), and present the corresponding first results. SPADnet is aimed at a new generation of MRI-compatible, scalable large area image sensors, based on CMOS technology, that are ..."
Abstract - Cited by 2210 (5 self) - Add to MetaCart
, that are networked to perform gamma-ray detection and coincidence to be used primarily in (Time-of-Flight) Positron Emission Tomography (PET). The project innovates in several areas of PET systems, from optical coupling to single-photon sensor architectures, from intelligent ring networks to reconstruction

A Practical Model for Subsurface Light Transport

by Henrik Wann Jensen, Stephen R. Marschner, Marc Levoy, Pat Hanrahan , 2001
"... This paper introduces a simple model for subsurface light transport in translucent materials. The model enables efficient simulation of effects that BRDF models cannot capture, such as color bleeding within materials and diffusion of light across shadow boundaries. The technique is efficient even fo ..."
Abstract - Cited by 335 (23 self) - Add to MetaCart
for anisotropic, highly scattering media that are expensive to simulate using existing methods. The model combines an exact solution for single scattering with a dipole point source diffusion approximation for multiple scattering. We also have designed a new, rapid image-based measurement technique

Coupled Use of BSP and BVH Trees in Order to Exploit Ray Bundle PerformanceIntroduction � Single Ray � SIMD Rays [5]

by Gilles Cadet , 2007
"... � 4 rays � Speedup close to x3! ..."
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� 4 rays � Speedup close to x3!

Getting rid of packets - efficient simd single-ray traversal using multi-branching bvhs

by Ingo Wald, Carsten Benthin, Solomon Boulos , 2008
"... While contemporary approaches to SIMD ray tracing typically rely on traversing packets of coherent rays through a binary data structure, we instead evaluate the alternative of traversing individual rays through a bounding volume hierarchy with a branching factor of 16. Though obviously less effici ..."
Abstract - Cited by 19 (4 self) - Add to MetaCart
While contemporary approaches to SIMD ray tracing typically rely on traversing packets of coherent rays through a binary data structure, we instead evaluate the alternative of traversing individual rays through a bounding volume hierarchy with a branching factor of 16. Though obviously less

Capacity Scaling in MIMO Wireless Systems Under Correlated Fading

by Chen-nee Chuah, David N. C. Tse, Joseph M. Kahn, Reinaldo A. Valenzuela - IEEE TRANS. INFORM. THEORY , 2002
"... Previous studies have shown that single-user systems employing-element antenna arrays at both the transmitter and the receiver can achieve a capacity proportional to , assuming independent Rayleigh fading between antenna pairs. In this paper, we explore the capacity of dual-antenna-array systems und ..."
Abstract - Cited by 262 (2 self) - Add to MetaCart
Previous studies have shown that single-user systems employing-element antenna arrays at both the transmitter and the receiver can achieve a capacity proportional to , assuming independent Rayleigh fading between antenna pairs. In this paper, we explore the capacity of dual-antenna-array systems

The VolumePro Real-Time Ray-Casting System

by Hanspeter Pfister, Jan Hardenbergh, Jim Knittel, Hugh Lauer, Larry Seiler , 1999
"... This paper describes VolumePro, the world's first single-chip realtime volume rendering system for consumer PCs. VolumePro implements ray-casting with parallel slice-by-slice processing. Our discussion of the architecture focuses mainly on the rendering pipeline and the memory organization. Vol ..."
Abstract - Cited by 194 (10 self) - Add to MetaCart
This paper describes VolumePro, the world's first single-chip realtime volume rendering system for consumer PCs. VolumePro implements ray-casting with parallel slice-by-slice processing. Our discussion of the architecture focuses mainly on the rendering pipeline and the memory organization

Fast Algorithms for Volume Ray Tracing

by John Danskin, Pat Hanrahan , 1992
"... We examine various simple algorithms that exploit homogeneity and accumulated opacity for tracing rays through shaded volumes. Most of these methods have error criteria which allow them to trade quality for speed. The time vs. quality tradeoff for these adaptive methods is compared to fixed step mul ..."
Abstract - Cited by 121 (0 self) - Add to MetaCart
multiresolution methods. These methods are also useful for general light transport in volumes. 1 Introduction We are interested in speeding volume ray tracing computations. We concentrate on the one dimensional problem of tracing a single ray, or computing the intensity at a point from a single direction

GEOMETRICALLY LIT REGION ANALYSIS OF THE SINGLE-RAY DEBYE TERMS FOR THE TRANSMIS- SION OF A HIGH FREQUENCY PLANE WAVE INTO A DOUBLE-NEGATIVE CYLINDER BY THE MODIFIED WATSON TRANSFORMATION AND DEBYE SERIES EX-

by Saffet G. S¸en
"... Abstract—The Debye expansion integrals obtained by application of the Modified Watson Transformation and Debye series expansion to the Mie series for the high frequency plane wave transmitted into a double negative (DNG) cylinder are solved in the geometrically lit regions of the corresponding Debye ..."
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. For refractive indices satisfying |n | ≥ 10, it is shown that the maximum Debye series term index up to which simple single-ray tracing can be performed is bigger for a DNG cylinder than that for a DPS cylinder and the difference between the term indices increases as |n | increases. 1.

Searching for Mobile Intruders in a Polygonal Region by a Group of Mobile Searchers

by Masafumi Yamashita, Hideki Umemoto, Ichiro Suzuki, Tsunehiko Kameda - SIAM JOURNAL ON COMPUTING
"... The problem of searching for mobile intruders in a polygonal region by mobile searchers is considered. A searcher can move continuously inside a polygon holding a flashlight that emits a single ray of light whose direction can be changed continuously. The visibility of a searcher at any time instant ..."
Abstract - Cited by 156 (3 self) - Add to MetaCart
The problem of searching for mobile intruders in a polygonal region by mobile searchers is considered. A searcher can move continuously inside a polygon holding a flashlight that emits a single ray of light whose direction can be changed continuously. The visibility of a searcher at any time

Review: Protein Secondary Structure Prediction Continues to Rise

by Burkhard Rost - J. Struct. Biol , 2001
"... f prediction accuracy? We shall see. 2001 Academic Press INTRODUCTION History. Linus Pauling correctly guessed the formation of helices and strands (14, 15) (and falsely hypothesized other structures). Three years before Pauling's guess was verified by the publications of the first X-ray stru ..."
Abstract - Cited by 180 (22 self) - Add to MetaCart
f prediction accuracy? We shall see. 2001 Academic Press INTRODUCTION History. Linus Pauling correctly guessed the formation of helices and strands (14, 15) (and falsely hypothesized other structures). Three years before Pauling's guess was verified by the publications of the first X-ray
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