Results 211 to 220 of about 2,020,961 (266)
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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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Automatic focus control: the astigmatic lens approach
Applied Optics, 1984The use of an astigmatic lens to generate a position error signal (PES) suitable for servo control is discussed. A simple computer model was written that can predict adequately the performance of an astigmatic system. The effect of various system parameters on the PES is presented.
D K, Cohen +3 more
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Regulatory Focus: Hazardous Air Pollution Control
Environmental Science & Technology, 1986In June 1985, EPA announced its two-part strategy for dealing with hazardous air pollutants. The first portion would regulate toxic chemicals that are emitted through routine releases at various facilities across the country. The second major portion deals with acutely hazardous chemicals that result from sudden nonroutine releases.
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Focus control enhancement and on-product focus response analysis methodology
SPIE Proceedings, 2016With decreasing CDOF (Critical Depth Of Focus) for 20/14nm technology and beyond, focus errors are becoming increasingly critical for on-product performance. Current on product focus control techniques in high volume manufacturing are limited; It is difficult to define measurable focus error and optimize focus response on product with existing methods ...
Young Ki Kim +9 more
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HBCUs in Control [Focus on Education]
IEEE Control Systems, 2007Discusses the history, present state, and future of engineering programs at historically black colleges and universities (HBCUs). Includes an interview with Lee Keel, director of the Center for System Science Research Project (CSSR) at Tennessee State University (TSU).
Emmanuel G. Collins, Abdollah Homaifar
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