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Teaching about the use of color as a means of expression by black and white closed circuit televisionPlummer, Carlton B. January 1964 (has links)
Thesis (M.F.A.)--Boston University / PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis or dissertation. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you. / 2031-01-01
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Design and Control of a Closed-Circuit Servo-Controlled Miniature Hydraulic Rotary JointArefi, Masoud 04 1900 (has links)
In the last few decades, miniaturization has been in increasing demand in many applications. The miniature actuators should comprise high power-weight ratio while having a fast dynamic response, and high efficiency. In this thesis several approaches have been studied to develop a low pressure water hydraulic system driving a miniature rotary joint as the end-effecter. While the system was expected to have a cross sectional diameter of 15 mm, two prototypes were manufactured having cross sections of 12.5 mm X 13 mm (18 mm dia.) and 16 mm X 18 mm (24 mm dia.). The system involves a novel closed-circuit water hydraulic system in which a controlled volume of water supplied by a motor-cylinder pump drives the rotary joint cylinders (4 mm bore). The linear motion of these cylinders is converted to a rotational motion through a sliders-pulley mechanism. The rotation of an arm attached to this pulley is measured by a magnetic rotary encoder. The dynamic behaviour of the system was studied and the most important parameters have been modelled. This model has been utilized in the design of a model based feedforward (FFWD) controller which was added to a PID controller to enhance the position control of the rotary arm. Numerous experiments were conducted with the horizontal rotation of the rotary arm. The maximum error ( emax) recorded for a mixed
input (a combination of rising and falling cycloidals of 120° and 60° with pause periods
of 1 and 0.5 s) with a PID controller was 8.3° while with the addition of the FFWD term
this dropped to 6.2°. The maximum root mean square error (RMSE) for the same
trajectory has been 1.7° and 0.9° for PID and FFWD+PID controllers respectively. The
steady state error (SSE) which was measured during a eycloidal input of 120° was recorded to be in the range of ±0.2° for both of the controllers. The robustness of the controllers was evaluated by adding a mass of 8.5 g to the end of the rotary arm which produced an un-modelled extra large inertia to the system dynamic when the arm rotating horizontally. Robustness of both controllers was demonstrated as the change in the main numerical performance indicators (RMSE, ernax, and SSE) were not remarkable. Another set of experiments performed with the rotary joint positioned vertically introduced with an un-modelled changing force. The numerical performance indicators were almost unchanged again. A comparison between the results of this thesis with the ones from the previous work in our laboratory by R. Sindrey indicates a significant improvement. / Thesis / Master of Applied Science (MASc)
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Motion based image processing algorithms applied to crowd monitoring systemsBoghossian, Boghos Alex January 2001 (has links)
No description available.
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Public surveillance CCTV : aspects of its impact on policing in an English forceGoold, B. J. January 2001 (has links)
No description available.
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Closed circuit television the Cincinnati experience /Hurley, David C. January 2002 (has links)
Thesis (Ph. D.)--University of Cincinnati, 2002. / Title from electronic thesis title page (viewed Apr. 21, 2003). Includes abstract. Includes bibliographical references.
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A study of the effects on output of industrial workers when closed circuit television is used to permit remote observation of worker performanceEberhart, John Muth 05 1900 (has links)
No description available.
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The introduction and development of closed circuit television in the elementary schoolShowalter, Bradley Gene January 1969 (has links)
There is no abstract available for this dissertation.
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A study of closed-circuit educational television at Hagerstown, MarylandSantos, Peter A., Pelczar, Andrew J. January 1958 (has links)
Thesis (Ed.M.)--Boston University
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The rise of open-street CCTV surveillance in CanadaWalby, Kevin. 10 April 2008 (has links)
No description available.
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A comparative analysis of attitudes of students taught introductory college geography by closed-circuit television and the classroom discussion method /Sims, Joe V., January 1968 (has links)
Thesis (Ed. D.)--University of Oklahoma, 1968. / Includes bibliographical references (leaves [72]-77).
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