نتایج جستجو برای: exposure time

تعداد نتایج: 2143328  

2004
Jordan Horowitz Stefan Westerhoff

Presented are a number of techniques to search for anisotropies in High Resolution Fly’s Eye stereo data collected to date. The method employed to search for point sources is that of shower density sky maps. An integrated version is used to search for larger anisotropies. Finally, large-scale anisotropies are investigated using a harmonic analysis designed to account for HiRes uneven exposure t...

Journal: :Genetics and molecular research : GMR 2015
L V Ribeiro Neto A P Oliveira M V Lourenço B W Bertoni S C França T M Rosa-Santos S M Zingaretti

Here, we report a quick and low-cost method to improve plant transformation using Agrobacterium tumefaciens. This method involves the use of physical wounding, ultrasound, and an increase in exposure time to the bacteria. We show how the transformation rate increased from 0 to 14% when an ultrasound pulse of 10 s was used in conjunction with 96 h of bacterial exposure in Eclipta alba explants.

Journal: :Perception & psychophysics 2008
Zhe Chen Kyle R Cave

Previous studies have concluded that object-based attention does not always arise if attention is cued endogenously (Macquistan, 1997) or if the target location is known with certainty (Shomstein & Yantis, 2002). In the Experiments reported here, we found object-based attention even when the locations of the two targets were known with certainty due to presentation of an endogenous cue. However...

Journal: :Journal of occupational and environmental medicine 2015
Mathieu Boniol Alice Koechlin Magali Boniol Faustine Valentini Marie-Christine Chignol Jean-François Doré Jean-Luc Bulliard Antoine Milon David Vernez

OBJECTIVES Occupational ultraviolet (UV) exposure was evaluated in a population-based sample in France. METHODS A random survey was conducted in 2012 in individuals aged 25 to 69 years. The median daily standard erythemal UV dose (SED) was estimated from exposure time and place and matched to satellite UV records. RESULTS A total of 889 individuals were exposed to solar UV with highest dose...

Journal: :Journal of agricultural safety and health 2005
T L Wilkinson S R Beer W E Field

Prior studies at Purdue University have shown that PTO entanglements occur most frequently on portable grain augers. A research project was conducted to measure operator exposure to PTO components and document work patterns during the use of grain augers. Information on the methodologies used to measure operator exposure is presented along with data on exposure to conventional grain augers whil...

Journal: :Acta crystallographica. Section D, Biological crystallography 1998
R B Ravelli M L Raves Z Ren D Bourgeois M Roth J Kroon I Silman J L Sussman

Acetylcholinesterase (AChE) is one of nature's fastest enzymes, despite the fact that its three-dimensional structure reveals its active site to be deeply sequestered within the molecule. This raises questions with respect to traffic of substrate to, and products from, the active site, which may be investigated by time-resolved crystallography. In order to address one aspect of the feasibility ...

2017
Kyosuke Isoda

An acid-responsive N-heteroacene-based material has been prepared, which shows a blue emission color in a film. The protonation of this material in a thin film gives rise to remarkable changes in luminescent color compared to that in solution states. As the protonation of N-heteroacene molecules in films gradually occurs, their emission color can be tuned by adjusting the exposure time of the t...

2016
Huiyun Li Luyan Ji Ke Tong Naixin Ren Wenfeng Chen Chang Hong Liu Xiaolan Fu

There is growing evidence that human observers are able to extract the mean emotion or other type of information from a set of faces. The most intriguing aspect of this phenomenon is that observers often fail to identify or form a representation for individual faces in a face set. However, most of these results were based on judgments under limited processing resource. We examined a wider range...

Journal: :Perception & psychophysics 1988
C Marendaz F Brenet T Ohlmann C Raphel

This research was undertaken to demonstrate, with correlational evidence, that presenting the rod-and-fi’ame test (RFT) with either limited (tachistoscopic) or unlimited (Oltman’s, 1968, portable RFT) exposure time does not significantly affect the ranking of subjects. The underlying hypothesiis is that the intersubject variability of performance on the portable RFT is due essentially to differ...

Journal: :Memory & cognition 1974
G R Loftus

Two experiments tested recognition memory for rapidly presented stimuli. In Experiment I 16 words were presented at exposure times ranging from 25 to 500 msec followed by a yes-no recognition test. The results showed a strong dependence of memory performance on both exposure time and serial position. In Experiment II 16 random forms were presented at exposure times ranging from 125 to 2000 msec...

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