Results 1 - 10 of 13,294

Active Region Loops Observed with SUMER on board

by Jongchul Chae, Haimin Wang, Jiong Qiu, Philip R. Goode, Klaus Wilhelm , 1999
"... We study the structure and dynamics of active region magnetic loops at transition region temperatures by analyzing high resolution observations of the active region NOAA 7962 at the limb on 1996 May 6. During the decay phase of a B-class flare which occurred at the active region, the Solar Ultraviol ..."
Abstract - Cited by 2 (0 self) - Add to MetaCart
We study the structure and dynamics of active region magnetic loops at transition region temperatures by analyzing high resolution observations of the active region NOAA 7962 at the limb on 1996 May 6. During the decay phase of a B-class flare which occurred at the active region, the Solar

Active Region Loops Observed with SUMER on board

by Jongchul Chae Haimin, Jongchul Chae, Haimin Wang, Jiong Qiu, Philip R. Goode, Klaus Wilhelm , 1999
"... We study the emission and dynamical characteristics of transition region temperature plasmas in magnetic loops by analyzing a high-resolution, limb observation of the active region NOAA 7962. The observations were performed by the Solar Ultraviolet Measurements of Emitted Radiation (SUMER) instrumen ..."
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We study the emission and dynamical characteristics of transition region temperature plasmas in magnetic loops by analyzing a high-resolution, limb observation of the active region NOAA 7962. The observations were performed by the Solar Ultraviolet Measurements of Emitted Radiation (SUMER

Constraints on the Heating of High Temperature Active Region Loops: Observations from Hinode and SDO

by Harry P. Warren, David H. Brooks, Amy R. Winebarger
"... ar ..."
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Action recognition in the premotor cortex

by Vittorio Gallese, Luciano Fadiga, Leonardo Fogassi, Giacomo Rizzolatti - Brain , 1996
"... We recorded electrical activity from 532 neurons in the rostral part of inferior area 6 (area F5) of two macaque monkeys. Previous data had shown that neurons of this area discharge during goal-directed hand and mouth movements. We describe here the properties of a newly discovered set of F5 neurons ..."
Abstract - Cited by 671 (47 self) - Add to MetaCart
neurons ('mirror neurons', n = 92) all of which became active both when the monkey performed a given action and when it observed a similar action performed by the experimenter. Mirror neurons, in order to be visually triggered, required an interaction between the agent of the action

Nonparametric model for background subtraction

by Ahmed Elgammal, David Harwood, Larry Davis - in ECCV ’00 , 2000
"... Abstract. Background subtraction is a method typically used to seg-ment moving regions in image sequences taken from a static camera by comparing each new frame to a model of the scene background. We present a novel non-parametric background model and a background subtraction approach. The model can ..."
Abstract - Cited by 545 (17 self) - Add to MetaCart
Abstract. Background subtraction is a method typically used to seg-ment moving regions in image sequences taken from a static camera by comparing each new frame to a model of the scene background. We present a novel non-parametric background model and a background subtraction approach. The model

Brain magnetic resonance imaging with contrast dependent on blood oxygenation.

by S Ogawa , T M Lee , A R Kay , D W Tank - Proc. Natl. Acad. Sci. USA , 1990
"... ABSTRACT Paramagnetic deoxyhemoglobin in venous blood is a naturally occurring contrast agent for magnetic resonance imaging (MRI). By accentuating the effects of this agent through the use of gradient-echo techniques in high fields, we demonstrate in vivo images of brain microvasculature with imag ..."
Abstract - Cited by 648 (1 self) - Add to MetaCart
to regional neural activity. Magnetic resonance imaging (MRI) is a widely accepted modality for providing anatomical information. Current research (1) involves extending MRI methods to provide information about biological function, in addition to the concomitant anatomical information. In addition

A unified statistical approach for determining significant signals in images of cerebral activation

by K. J. Worsley, S. Marrett, P. Neelin, K. J. Friston , 1996
"... Abstract: We present a unified statistical theory for assessing the significance of apparent signal observed in noisy difference images. The results are usable in a wide range of applications, including astrophysics, but are discussed with particular reference to images which represent changes in ce ..."
Abstract - Cited by 400 (39 self) - Add to MetaCart
Abstract: We present a unified statistical theory for assessing the significance of apparent signal observed in noisy difference images. The results are usable in a wide range of applications, including astrophysics, but are discussed with particular reference to images which represent changes

Crystal structure of rhodopsin: a G protein-coupled receptor

by Krzysztof Palczewski, Takashi Kumasaka, Tetsuya Hori, Craig A. Behnke, Hiroyuki Motoshima, Brian A. Fox, Isolde Le Trong, David C. Teller, Tetsuji Okada, Ronald E. Stenkamp, Masaki Yamamoto, Masashi Miyano - LeTrong I, Teller DC, Okada T, Stenkamp RE et , 2000
"... Heterotrimeric guanine nucleotideÐbinding protein (G protein)Ðcoupled recep-tors (GPCRs) respond to a variety of different external stimuli and activate G proteins. GPCRs share many structural features, including a bundle of seven transmembrane a helices connected by six loops of varying lengths. We ..."
Abstract - Cited by 376 (4 self) - Add to MetaCart
Heterotrimeric guanine nucleotideÐbinding protein (G protein)Ðcoupled recep-tors (GPCRs) respond to a variety of different external stimuli and activate G proteins. GPCRs share many structural features, including a bundle of seven transmembrane a helices connected by six loops of varying lengths

Characterization of microbial diversity by determining terminal restriction length polymorphisms of genes encoding 16S rDNA.

by Wen-Tso Liu , Terence L Marsh , Hans Cheng , Larry J Forney - Appl. Environ. Microbiol. , 1997
"... A quantitative molecular technique was developed for rapid analysis of microbial community diversity in various environments. The technique employed PCR in which one of the two primers used was fluorescently labeled at the 5 end and was used to amplify a selected region of bacterial genes encoding ..."
Abstract - Cited by 263 (7 self) - Add to MetaCart
A quantitative molecular technique was developed for rapid analysis of microbial community diversity in various environments. The technique employed PCR in which one of the two primers used was fluorescently labeled at the 5 end and was used to amplify a selected region of bacterial genes encoding

The probability of duplicate gene preservation by subfunctionalization.

by Michael Lynch , Allan Force - Genetics , 2000
"... ABSTRACT It has often been argued that gene-duplication events are most commonly followed by a mutational event that silences one member of the pair, while on rare occasions both members of the pair are preserved as one acquires a mutation with a beneficial function and the other retains the origin ..."
Abstract - Cited by 261 (2 self) - Add to MetaCart
; Wendel 1999). The high degree of duplicate-gene chromosomal regions or entire chromosomes, or gepreservation observed for genome duplication events nome-wide events that result in complete genome dupli-(commonly on the order of 20-50%) for such long cation (polyploidization). Because gene duplicates
Results 1 - 10 of 13,294