Results 241 to 250 of about 7,142,971 (300)
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Bulletin of the Atomic Scientists, 1986
The authors believe that paying attention to weapons—whether advocating increases or reductions— detracts from the basic task of dealing with the sources of conflict and militarism.
William A. Schwartz, Charles Derber
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The authors believe that paying attention to weapons—whether advocating increases or reductions— detracts from the basic task of dealing with the sources of conflict and militarism.
William A. Schwartz, Charles Derber
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Depth-of-focus: Control system implications
Computers in Biology and Medicine, 2007The depth-of-focus (DOF) plays a major role in accommodative control. It provides a neurological tolerance for retinal defocus and the perception of blur. Hence, the DOF has been an important component in bioengineering models of the accommodative system, but with its model-based control function limited to the fovea.
Kenneth J, Ciuffreda +2 more
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Focus control system for laser welding
Applied Optics, 1997We describe a focus control system for Nd:YAG laser welding based on an optical sensor incorporated into the fiber delivery system to detect light generated by the process. This broadband light is separated into two wavelength bands, and simple electronic processing gives a signal proportional to focal error as a result of chromatic aberrations in the ...
F M, Haran +3 more
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Family focus or career focus: controlling for infertility
Social Science & Medicine, 1999In order to shed light on the direction of causality between fertility timing and earnings, this paper uses medical diagnoses of infertility as instruments for age at first birth (for those women who did give birth) and childlessness among married women. Although multivariate ordinary least squares regression results find a positive correlation between
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Sonar controlled lens focus apparatus
The Journal of the Acoustical Society of America, 1980An automatic focusing apparatus for a camera comprises a camera to photographic subject ranging device for providing a signal indication of elapsed time corresponding to the camera-to-subject distance and an objective lens arrangement displaceable between a plurality of focal positions at a rate such that the objective lens arrangement reaches each of ...
Bruce K. Johnson, George D. Whiteside
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Focus-distance-controlled 3D TV
SPIE Proceedings, 1997There is a phenomenon that a 3D image appears in proportion to a focus distance when something is watched through a convex lens. An adjustable focus lens which can control the focus distance of the convex lens is contrived and applied to 3D TV. We can watch 3D TV without eyeglasses. The 3D TV image meets the NTSC standard.
Nobuaki Yanagisawa +4 more
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Improving Visual Performance through Volitional Focus Control
Human Factors: The Journal of the Human Factors and Ergonomics Society, 1986Nine undergraduate students were trained to control eye accommodation volitionally and, by exercising that acquired ability, to improve by varying amounts their visual acuity, contrast sensitivity, and flash target resolution. Six of the nine received auditory biofeedback of focusing responses measured automatically by a complex infrared tracking ...
S N, Roscoe, D H, Couchman
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Tube entrance lens focus control
AIP Conference Proceedings, 2013The entrance of the accelerator tube in a large electrostatic accelerator imposes a strong lens that dominates the beam optics. The magnification of the lens is large because of the low injection energy, the high voltage gradient of the acceleration tube and the long distance to the terminal.
D. C. Weisser +5 more
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Regulatory Focus and Illusions of Control
Personality and Social Psychology Bulletin, 2007Regulatory focus theory (Higgins, 1997, 1998) suggests that individuals in a promotion focus emphasize a congruence between an action and an intended outcome, which may foster illusions of control (IOC) even in the absence of an objective relationship between action and outcome.
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