• Documents
  • Authors
  • Tables
  • Log in
  • Sign up
  • MetaCart
  • DMCA
  • Donate

CiteSeerX logo

Tools

Sorted by:
Try your query at:
Semantic Scholar Scholar Academic
Google Bing DBLP
Results 1 - 10 of 14,803
Next 10 →

2003: Global analyses of sea surface temperature, sea ice, and night marine air temperature since the late Nineteenth Century

by N. A. Rayner, D. E. Parker, E. B. Horton, C. K. Foll, L. V. Alex, D. P. Rowell, A. Kaplan - J. Geophysical Research
"... data set, HadISST1, and the nighttime marine air temperature (NMAT) data set, HadMAT1. HadISST1 replaces the global sea ice and sea surface temperature (GISST) data sets and is a unique combination of monthly globally complete fields of SST and sea ice concentration on a 1 ° latitude-longitude grid ..."
Abstract - Cited by 517 (3 self) - Add to MetaCart
data set, HadISST1, and the nighttime marine air temperature (NMAT) data set, HadMAT1. HadISST1 replaces the global sea ice and sea surface temperature (GISST) data sets and is a unique combination of monthly globally complete fields of SST and sea ice concentration on a 1 ° latitude-longitude grid from 1871. The companion HadMAT1 runs monthly from 1856 on a 5 ° latitude-longitude grid and incorporates new corrections for the effect on NMAT of increasing deck (and hence measurement) heights. HadISST1 and HadMAT1 temperatures are reconstructed using a two-stage reducedspace optimal interpolation procedure, followed by superposition of quality-improved gridded observations onto the reconstructions to restore local detail. The sea ice fields are made more homogeneous by compensating satellite microwave-based sea ice concentrations for the impact of surface melt effects on retrievals in the Arctic and for algorithm deficiencies in the Antarctic and by making the historical in situ concentrations consistent with the satellite data. SSTs near sea ice are estimated using statistical relationships between SST and sea ice concentration. HadISST1 compares well with other published analyses, capturing trends in global, hemispheric, and regional SST well,

Gradient Domain High Dynamic Range Compression

by Raanan Fattal, Dani Lischinski, Michael Werman - PROCEEDINGS OF ACM SIGGRAPH 2002 , 2002
"... We present a new method for rendering high dynamic range images on conventional displays. Our method is conceptually simple, computationally efficient, robust, and easy to use. We manipulate the gradient field of the luminance image by attenuating the magnitudes of large gradients. A new, low dynami ..."
Abstract - Cited by 375 (10 self) - Add to MetaCart
We present a new method for rendering high dynamic range images on conventional displays. Our method is conceptually simple, computationally efficient, robust, and easy to use. We manipulate the gradient field of the luminance image by attenuating the magnitudes of large gradients. A new, low dynamic range image is then obtained by solving a Poisson equation on the modified gradient field. Our results demonstrate that the method is capable of drastic dynamic range compression, while preserving fine details and avoiding common artifacts, such as halos, gradient reversals, or loss of local contrast. The method is also able to significantly enhance ordinary images by bringing out detail in dark regions.

3-D Sound for Virtual Reality and Multimedia

by Durand Begault , 2000
"... This paper gives HRTF magnitude data in numerical form for 43 frequencies between 0.2---12 kHz, the average of 12 studies representing 100 different subjects. However, no phase data is included in the tables; group delay simulation would need to be included in order to account for ITD. In 3-D sound ..."
Abstract - Cited by 282 (5 self) - Add to MetaCart
This paper gives HRTF magnitude data in numerical form for 43 frequencies between 0.2---12 kHz, the average of 12 studies representing 100 different subjects. However, no phase data is included in the tables; group delay simulation would need to be included in order to account for ITD. In 3-D sound applications intended for many users, we want might want to use HRTFs that represent the common features of a number of individuals. But another approach might be to use the features of a person who has desirable HRTFs, based on some criteria. (One can sense a future 3-D sound system where the pinnae of various famous musicians are simulated.) A set of HRTFs from a good localizer (discussed in Chapter 2) could be used if the criterion were localization performance. If the localization ability of the person is relatively accurate or more accurate than average, it might be reasonable to use these HRTF measurements for other individuals. The Convolvotron 3-D audio system (Wenzel, Wightman, and Foster, 1988) has used such sets particularly because elevation accuracy is affected negatively when listening through a bad localizers ears (see Wenzel, et al., 1988). It is best when any single nonindividualized HRTF set is psychoacoustically validated using a 113 statistical sample of the intended user population, as shown in Chapter 2. Otherwise, the use of one HRTF set over another is a purely subjective judgment based on criteria other than localization performance. The technique used by Wightman and Kistler (1989a) exemplifies a laboratory-based HRTF measurement procedure where accuracy and replicability of results were deemed crucial. A comparison of their techniques with those described in Blauert (1983), Shaw (1974), Mehrgardt and Mellert (1977), Middlebrooks, Makous, and Gree...

What is an Oil Shock?

by James D. Hamilton , 2001
"... ..."
Abstract - Cited by 252 (9 self) - Add to MetaCart
Abstract not found

optic canal.

by Santos-bueso E, Genol-saavedra I, Calvo-gonzález C, Huelga-zapico E, Díaz-valle D, Benítez-del-castillo Jm, García-sánchez J, Enrique Santos Bueso
"... Case report:We present the case of a patient diag-nosed with amaurosis of the right eye secondary to a right frontal contusion. The energy of the impact was projected from the orbital ceiling to the minor wing of the sphenoid bone. This bone was fractu-red, thus reducing the optic canal diameter and ..."
Abstract - Add to MetaCart
Case report:We present the case of a patient diag-nosed with amaurosis of the right eye secondary to a right frontal contusion. The energy of the impact was projected from the orbital ceiling to the minor wing of the sphenoid bone. This bone was fractu-red, thus reducing the optic canal diameter

Adaptive Statistical Language Modeling: A Maximum Entropy Approach

by Ronald Rosenfeld, Jaime Carbonell, Alexander Rudnicky , 1994
"... Language modeling is the attempt to characterize, capture and exploit regularities in natural language. In statistical language modeling, large amounts of text are used to automatically determine the model's parameters. Language modeling is useful in automatic speech recognition, machine transl ..."
Abstract - Cited by 206 (6 self) - Add to MetaCart
Language modeling is the attempt to characterize, capture and exploit regularities in natural language. In statistical language modeling, large amounts of text are used to automatically determine the model's parameters. Language modeling is useful in automatic speech recognition, machine translation, and any other application that processes natural language with incomplete knowledge. In this thesis, I view language as an information source which emits a stream of symbols from a finite alphabet (the vocabulary). The goal of language modeling is then to identify and exploit sources of information in the language stream, so as to minimize its perceived entropy. Most existing statistical language models exploit the immediate past only. To extract information from further back in the document's history, I use trigger pairs as the basic information bearing elements. This allows the model to adapt its expectations to the topic of discourse. Next, statistical evidence from many sources must...

Fundamentals of Texture Mapping and Image Warping

by Paul S. Heckbert , 1989
"... The applications of texture mapping in computer graphics and image distortion (warping) in image processing share a core of fundamental techniques. We explore two of these techniques, the twodimensional geometric mappings that arise in the parameterization and projection of textures onto surfaces, a ..."
Abstract - Cited by 203 (0 self) - Add to MetaCart
The applications of texture mapping in computer graphics and image distortion (warping) in image processing share a core of fundamental techniques. We explore two of these techniques, the twodimensional geometric mappings that arise in the parameterization and projection of textures onto surfaces, and the filters necessary to eliminate aliasing when an image is resampled during texture mapping or warping. With respect to mappings, this work presents a tutorial on three common classes of mapping: the affine, bilinear, and projective. For resampling, this work develops a new theory describing the ideal, space variant antialiasing filter for signals warped and resampled according to an arbitrary mapping. Efficient implementations of the mapping and filtering techniques are discussed and demonstrated.

B. CANALS

by Julien Robert, R. Ballou, A. Harrison, P. Mendels (président, V. Simonet Remerciements, Céline Darie, Pascale Deen, Aurélien Fay, Christopher L. Henley, Abdellali Hadj, Alain Ibanez, Marc Johnson, Pascal Lejay, Elsa Lhotel, Karol Marty, Jacques Ollivier, Bachir Ouladiaff, Harisson Rakoto, Anne Stunault, Jan Vogel, Wolfgang Wernsdorfer, Mohamed Zbiri, Ainsi Que
"... pour obtenir le titre de docteur en physique ..."
Abstract - Add to MetaCart
pour obtenir le titre de docteur en physique

Anomalous Facial Nerve Canal with

by Cochlear Malformations, Laura Vitale Romo, Hugh D. Curtin
"... nerve canal has been previously identified in a patient with a non-Mondini-type cochlear mal-formation. In this study, several patients with the same facial nerve canal anomaly were re-viewed to assess for the association and type of cochlear malformation. METHODS: CT scans of the temporal bone of 1 ..."
Abstract - Add to MetaCart
nerve canal has been previously identified in a patient with a non-Mondini-type cochlear mal-formation. In this study, several patients with the same facial nerve canal anomaly were re-viewed to assess for the association and type of cochlear malformation. METHODS: CT scans of the temporal bone

Path: Comparison With Root Canals

by Elio Berutti, Giorgio Chi, Damiano Pasqualini
"... Four landmarks were placed in each block. Each specimen was mounted on a stable Basic Research–Technologysupport consisting of a rectangular slot of the size of the specimen (30 10 mm) and a support for a digital camera (Nikon D70, Tokyo, Japan), positioned centrally and at 90 degrees to the specim ..."
Abstract - Add to MetaCart
Maillefer) scouted the canal up to working length. Mechanical preflaring with new PathFile Rotary instruments 1, 2, and 3 at working length was performed by an endodontist by using an endodontic engine (X-Smart; Dentsply Maillefer) with a 16:1 contra angle, at the suggested setting (300 rpm on display, 5
Next 10 →
Results 1 - 10 of 14,803
Powered by: Apache Solr
  • About CiteSeerX
  • Submit and Index Documents
  • Privacy Policy
  • Help
  • Data
  • Source
  • Contact Us

Developed at and hosted by The College of Information Sciences and Technology

© 2007-2018 The Pennsylvania State University