نتایج جستجو برای: exposure time

تعداد نتایج: 2143328  

2010
M Arabi Gayatri Joshi Kavya P Parameswaran Abhik Raj Subedi

Noises are always present in an image posing higher or lower complexity in removal and however it is necessary to remove those noises to obtain a better image. There are various types of filters available that help us to remove those noises; only when a right type of filter is used the best result could be obtained. This paper compares the performance of filters namely median, Weiner, average a...

Journal: :Physiology & behavior 2015
C Peter Herman Janet Polivy Patricia Pliner Lenny R Vartanian

The portion-size effect (PSE) refers to the fact that people eat more when served larger portions. This effect is neither obvious nor artifactual. We examine the prevailing explanations (or underlying mechanisms) that have been offered for the PSE. The dominant candidate mechanism is "appropriateness"; that is, people accept the portion that they are served as being of an appropriate size and e...

Journal: :Nucleic acids research 1996
C H Paul A T Royappa

Under the conditions normally used for detritylation in oligonucleotide synthesis, the haloacetic acid binds strongly to the oligonucleotide. Acetonitrile also forms a complex with the deblocking acid, in competition with the oligonucleotide, and drastically slows detritylation. Incomplete removal of acetonitrile during the deblock step may slow the kinetics enough to result in incomplete detri...

2007
John R. Sparks Charles S. Areni

This research explores how message style influences persuasion in conjunction with message substance. Using the elaboration likelihood model, the study operationalizes message style as language power and message substance as argument quality, then considers the multiple roles language power can assume in persuasion. The authors investigate whether language power acts as a (a) central argument, ...

Journal: :Water science and technology : a journal of the International Association on Water Pollution Research 2008
D Y Lyon D A Brown P J J Alvarez

Stable fullerene water suspensions (nC(60)) exhibited potent antibacterial activity to physiologically different bacteria in low-salts media over a wide range of exposure conditions. Antibacterial activity was observed in the presence or absence of light or oxygen, and increased with both exposure time and dose. The activity was also influenced by the nC(60) storage conditions and by the age of...

2010
Irina A. Strigo Alan N. Simmons Scott C. Matthews Arthur D. (Bud) Craig

The allocation of attention modulates negative emotional processing in the amygdala. However, the role of passive exposure time to emotional signals in the modulation of amygdala activity during active task performance has not been examined. In two functional Magnetic Resonance Imaging (fMRI) experiments conducted in two different groups of healthy human subjects, we examined activation in the ...

2003
Mariachiara Rossetti Silvano Molendi

We report results from a re-analysis of the BeppoSAX observation of Coma and from the analysis of a second, yet unpublished observation of the same object. From our re-analysis of the first observation we find that the statistical evidence for a hard tail is about 2σ. From the analysis of the second observation which, thanks to the lower background and the longer exposure time, is characterized...

2018
Abby Rudolph Karin Tobin Jonathan Rudolph Carl Latkin

BACKGROUND Although studies that characterize the risk environment by linking contextual factors with individual-level data have advanced infectious disease and substance use research, there are opportunities to refine how we define relevant neighborhood exposures; this can in turn reduce the potential for exposure misclassification. For example, for those who do not inject at home, injection r...

Journal: :Journal of nuclear medicine : official publication, Society of Nuclear Medicine 1966
M Ben-Porath A A Imperato E Kaplan

METHOD A 14" X 17" Kodak Industrial x-ray film, type M, is placed on a smooth surface in a darkroom. The original photoscan is superimposed on this film, and then both covered with a 15" X 18" glass plate, one-fourth inch thick, and exposed to an incadescent bulb for a very short period of time, 0.5-2.0 seconds. The ex posed film is developed and a negative picture is obtained. The contrast on ...

Journal: :Optics letters 2008
Chunfang Ye Robert R McLeod

We introduce a new method to make gradient index (GRIN) lenses and GRIN lens arrays by exposing diffusion-driven photopolymers using a low-power CW laser. By changing the size and power of the laser beam and the exposure time the index profile of the GRIN lens can be controlled. Combined with the self-developing nature of the photopolymer, this enables rapid "on-demand" printing of arbitrary mi...

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