Results 251 to 260 of about 78,383 (300)

Effects of stimulus modality on the shuttle activity in rats

Behavioural Brain Research, 2004
Shuttle activity during repeated presentation of irrelevant auditory (white band noise) and visual (darkness) stimuli was studied in 32 male Möll-Wistar rats. The subjects were randomly divided into two groups. In Group ND the auditory stimulus was used in the first habituation session, and the visual stimulus in the second habituation session.
Tomasz, Werka, Grazyna, Walasek, Krystyna, Swirszcz   +2 more
openaire   +2 more sources

Spin Valve Effect in a Magnetic Nanoelectromechanical Shuttle

Physical Review Letters, 2008
We study spin-dependent shuttle phenomena in a nanoelectromechanical single electron transistor (NEM-SET) with magnetic leads by considering the coupling between the transport of spin-polarized electrons and mechanical oscillations of the nanometer quantum dot. It is shown that there are two different bias-voltage thresholds for the shuttle instability
Rui-Qiang, Wang, Baigeng, Wang, D Y, Xing   +2 more
openaire   +2 more sources

Distinct Nanostructures from a Molecular Shuttle: Effects of Shuttling Movement on Nanostructural Morphologies

Advanced Functional Materials, 2008
AbstractA solvent driven molecular shuttle that contains a TCBD chromophore and in which the macrocycle can be positioned close to or far from the TCBD unit with a change of solvent is prepared. Several distinct nanostructures are obtained by control of the shuttling movement of the macrocycle: i) in a mixed solvent of CHCl3/n‐C6H14 (1/1, v/v), the ...
Weidong Zhou, Jialiang Xu, Haiyan Zheng, Xiaodong Yin, Zicheng Zuo, Huibiao Liu, Yuliang Li   +6 more
openaire   +1 more source

Diodelike effect in nanoelectromechanical shuttle devices

Physical Review B, 2008
We have analyzed the effect of bias-voltage polarities on the shuttle instability in an asymmetrically nanoelectromechanical single-electron transistor (NEM-SET) using the Wigner phase space approach. The electric-field-induced shift in oscillation equilibrium position together with the asymmetrical tunneling rate leads to the symmetry breaking of ...
Rui-Qiang Wang, Baigeng Wang, D. Y. Xing
openaire   +1 more source

Effective placement of chips on a shuttle mask

SPIE Proceedings, 2003
An effective algorithm was developed to prepare a mask layout from several chip databases. The underlying idea is solving so called “strip packing” problems, which actually have been very common in many industries. A major difference between applications is the definition of cost function used in a particular packing problem.
Shih-Ying Chen, Eric C. Lynn
openaire   +1 more source

Energetics of Shuttle Runs: The Effects of Distance and Change of Direction

International Journal of Sports Physiology and Performance, 2014
Shuttle runs can be used to study the physiological responses in sports (such as basketball) characterized by sprints (accelerations/decelerations) and changes of direction.Purpose:To determine the energy cost (C) of shuttle runs with different turning angles and over different distances (with different acceleration/deceleration patterns).Methods:Nine ...
ZAMPARO, Paola, Zadro I., Lazzer S., BEATO, MARCO, Sepulcri L.   +4 more
openaire   +2 more sources

Effect of Surface Cooling and Roughness on Transition for the Shuttle Orbiter

Journal of Spacecraft and Rockets, 1977
An analysis of roughness-induced boundary-layer transition examines the sensitivity of the Orbiter boundary-layer transition criteria to surface cooling, to surface roughness, and to the assumed flow-field model. The experimental data were obtained using a 0.0175-scale Orbiter with surface roughness represented by misaligned heat-shield tiles for ...
J. BERTIN, E. IDAR, III, W. GOODRICH
openaire   +1 more source

Effect of the Shuttle contaminant environment on a sensitive infrared telescope

Applied Optics, 1977
A sensitive ir telescope on the Space Shuttle Orbiter will be limited in its performance by fluctuations in the ir radiation from the natural environment and the contaminant atmosphere. Models of the Orbiter's contaminant atmosphere were used to predict its spectral radiance from 3 microm to 300 microm.
J P, Simpson, F C, Witteborn
openaire   +2 more sources

Effect of lesions in hippocampal subareas on rat shuttle behavior

Physiology & Behavior, 1979
Abstract Rats with lesions in subareas CA3 and CA4/dentate gyrus of the dorsal hippocampus were submitted to four different experimental situations in a shuttlebox. Animals with CA3 lesions made less shuttle responses to a buzzer than sham-operated or intact control animals in two of the tests, in which the buzzer was paired (i.e., given contiguous ...
Calderazzofilho, L. S., Cavalheiro, E. A., IZQUIERDO, I   +2 more
openaire   +3 more sources

Environmental effects of Shuttle launch and landing

Shuttle Environment and Operations Meeting, 1983
The areas of concern were the toxic exhaust cloud produced by Shuttle launch, the effect of launch operations on the total ecology, and the sonic boom produced by Orbiter re-entry. Wet acidic dust fell from the exhaust cloud for about ten minutes after launch.
openaire   +1 more source