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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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Multichannel Room Correction with Focus Control
Journal of the Audio Engineering Society, 2015Digital equalization of audio systems is mostly performed on a channel-by-channel basis, i.e., loudspeakers are equalized separately and independently of each other. In reverberant rooms the spatial variability of the loudspeaker room transfer function puts a limit on what can be achieved with such single-channel approaches, and considerably more far ...
Lars-Johan Brännmark, Anders Ahlén
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Arms Control: Focus on Denial and Deception
Trends in Organized Crime, 2000Arms control continues to be a key element of U.S. national security policy. Yet, to be a constructive part of our national strategy, stringent arms control verification is required. Of late, the government has moved from agreements incorporating effective monitoring methods to multilateral, feel-good agreements that are very difficult, if not ...
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Focus on cardiovascular risk factor control
European Journal of Preventive Cardiology, 2022Geza Halasz, Massimo F Piepoli
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A strategic focus for process control
ISA Transactions, 1993Abstract Process control applications must begin with the needs of the commercial business in which the controls will be utilized. Once these are understood, the practitioner must address the nature and needs of the manufacturing process being used. At this point, an integrated control strategy can be meaningfully developed.
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Analytical Chemists Focus on Process Control
Chemical & Engineering News Archive, 1986Process analytical chemistry. It's not a term most academic scientists are familiar with. However, a group of chemists and engineers at the University of Washington, Seattle, are working to change that. Those scientists believe that developing the ability to monitor industrial processes on-line is one of the major current challenges in analytical ...
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