Results 261 to 270 of about 2,409,085 (314)
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American Journal of Psychiatry, 2008
With a new technology called optogenetics, it is possible to turn neuronal activity on and off in distinct neuronal populations, using cell-type specific, optically-sensitive, molecular, neuronal activity "switches." These "switches" are microbial, light-sensitive ion conductance-regulating proteins, exemplified by channelrhodopsin-2 (ChR2) and ...
Schneider, M. Bret +3 more
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With a new technology called optogenetics, it is possible to turn neuronal activity on and off in distinct neuronal populations, using cell-type specific, optically-sensitive, molecular, neuronal activity "switches." These "switches" are microbial, light-sensitive ion conductance-regulating proteins, exemplified by channelrhodopsin-2 (ChR2) and ...
Schneider, M. Bret +3 more
openaire +3 more sources
Active Control of Hypertension
The Physician and Sportsmedicine, 1998Hypertension is common, and even slight elevations in blood pressure can be associated with health risks. Regular aerobic exercise helps prevent hypertension. In patients who already have hypertension, such exercise has been shown to lower systolic and diastolic blood pressure by a mean of 10 mm Hg.
Alfred A. Bove +2 more
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Noise News International, 1993
Active noise control exploits the long wavelengths associated with low frequency sound. It works on the principle of destructive interference between the sound fields generated by the original primary sound source and that due to other secondary sources, acoustic outputs of which can be controlled.
Stephen J. Elliott, Philip Arthur Nelson
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Active noise control exploits the long wavelengths associated with low frequency sound. It works on the principle of destructive interference between the sound fields generated by the original primary sound source and that due to other secondary sources, acoustic outputs of which can be controlled.
Stephen J. Elliott, Philip Arthur Nelson
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Active Rectifiers and Their Control
2018This chapter investigates the control design of active rectifiers and their applications in power electronics-based power system. The harmonic emission and measures are firstly addressed as a basis of evaluating the active rectifier's effectiveness. Furthermore, the importance of new coming standards is highlighted.
Davari, Pooya +2 more
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Active Shielding and Control of Noise
SIAM Journal on Applied Mathematics, 2001Summary: We present a mathematical framework for the active control of time-harmonic acoustic disturbances. Unlike many existing methodologies, our approach provides for the exact volumetric cancellation of unwanted noise in a given predetermined region of space while leaving unaltered those components of the total acoustic field that are deemed ...
Josip Loncaric +2 more
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Continuous Bounded Controller for Active Control of Structures
Civil-Comp Proceedings, 2006This paper considers nonlinear controller under bounded capacity of the actuators. The controller is first derived based on bang-bang type controllers. In order to avoid high-speed switching effect, a continuous function is used to replace signum function in bang-bang controller.
Y. Arfiadi, M.N.S. Hadi
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A Modern Control Approach to Active Noise Control
Journal of Dynamic Systems, Measurement, and Control, 1993Active noise control systems currently in use and/or described in the research literature are typically based on adaptive signal processing theory or, equivalently, adaptive feedforward control theory. This paper presents a modern control approach to the problem of active noise cancellation in a three-dimensional space. The controller is designed based
Shoureshi, R. +3 more
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Nervous Control of Ciliary Activity
Science, 1964Electrical stimulation of the visceral ganglion of the mussel Mytilus edulis caused cilia on the lateral epithelium of the gill to beat faster. This effect was blocked by cocaine, physostigmine, hyoscyamine, and acetylcholine but not by tubocurarine. These agents did not block the cilioexcitatory effect of serotonin.
E, AIELLO, G, GUIDERI
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Control of Leukocyte Integrin Activation
American Review of Respiratory Disease, 1993Abstract The integrin receptors on leukocytes are transiently activated by “triggering” molecules that may be other leukocyte membrane structures such as the T-cell receptor complex or small molecules such as PAF, which bind to their own specific receptors.
N, Hogg +3 more
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Mechanisms controlling CDK9 activity
Frontiers in Bioscience, 2006This review primarily focuses on the mechanisms that modulate CDK9 activity and its recruitment to cellular genes, where it phosphorylates the C-terminal domain of RNA polymerase II (RNAPII) as well as negative elongation factors. CDK9 associates with each of four cyclins (T1, T2a, T2b and K), forming distinct positive transcription elongation factors (
Renee M, Marshall, Xavier, Grana
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