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Acoustic Emission Spectra Of Steel And Fiber Reinforced Concrete Beam Specimens As Induced By Static Loading, Christian C. Steputat
Acoustic Emission Spectra Of Steel And Fiber Reinforced Concrete Beam Specimens As Induced By Static Loading, Christian C. Steputat
Retrospective Theses and Dissertations
Acoustic emission (AE) behavior, due to localized cracking and damage, was studied in 200 reinforced concrete beams, 65 in. x 6 in. x 1 0 in., under monotonically increasing three point loading conditions. The material variables that have been emphasized, consist of: various concrete curing times (ages), amounts of tension and compression steel reinforcement, and significant glass fiber additions to the concrete mix. A total of 420 cylinders (6 in. x 12 in.) were tested to ascertain the range of material strength was minimal. Varying compression steel and tension steel areas, induced variations in the gross failures (observed cracking and/or …
Measuring And Compensating For Transport Delay In Real-Time Interactive Driving Simulation, Joseph D. Dumas Ii
Measuring And Compensating For Transport Delay In Real-Time Interactive Driving Simulation, Joseph D. Dumas Ii
Retrospective Theses and Dissertations
Real-time, man-in-the-loop simulators are important tools for operator training as well as human performance research. Simulator implementation using digital computers offers many important advantages but may also cause problems. One of the most significant and troublesome artifacts of digital computer simulation is the presence of transport delays in the operator/vehicle control loop. Transport delays have been shown to destabilize the system, resulting in poorer control of the simulated vehicle. They may also contribute to an increased likelihood of simulator sickness in human operators. Therefore, it is desirable to be able to quantify simulator transport delays and to compensate the system …
The Cry-Wolf Phenomenon And Its Effect On Alarm Responses, James P. Bliss
The Cry-Wolf Phenomenon And Its Effect On Alarm Responses, James P. Bliss
Retrospective Theses and Dissertations
Responses to alarms are assumed important. Yet failure to respond to alarms is recognized, although is not well understood or quantified. Conditions that might induce a failure to respond include alarm unreliability (i.e., numerous false alarms, the "cry-wolf" effect), high primary task demand, or low criticality of the alarm itself. The goals of this research were to substantiate the existence of the cry-wolf effect, quantifying its effect on operator performance, and to examine the relation between the cry-wolf effect and alarm criticality. One hundred thirty-eight UCF students alternatively performed two primary tasks, chosen from the Automated Performance Test System. Subjects …
Current Accessibility Of, Knowledge Of, And Experience With Distance Education Technologies At Three Small Colleges In Kelskemet Hungary, Richard Adams Dietzel
Current Accessibility Of, Knowledge Of, And Experience With Distance Education Technologies At Three Small Colleges In Kelskemet Hungary, Richard Adams Dietzel
Retrospective Theses and Dissertations
In Kecskemet, Hungary, three small colleges are discussing plans to form a new university and implement some of their courses using distance education technologies, if political and economic conditions are favorable. The purpose of this case study was to answer some basic questions about: (1) the accessibility to 74 different technologies which could be used in the planning and implementation of distance education programs, (2) the knowledge of the planners about these technologies, and (3) their experience using them. Planners were selected by respective college rectors as: ·Horticulture College (N=16), Mechanical Engineering and Automation College (N-16), Teacher Training College (N=7). …
Path To Chaos : Excess, Absence And Anarchy In Tennyson's Idylls Of The King, Peggie A. Howerton
Path To Chaos : Excess, Absence And Anarchy In Tennyson's Idylls Of The King, Peggie A. Howerton
Retrospective Theses and Dissertations
No abstract provided.
Phosphorus Accumulation In Bottom Sediments Of Retention/Detention Ponds, Kriss Young Kaye
Phosphorus Accumulation In Bottom Sediments Of Retention/Detention Ponds, Kriss Young Kaye
Retrospective Theses and Dissertations
Laboratory and field studies were conducted to characterize phosphorus in bottom sediments for retention/detention ponds. The laboratory studies, including batch and column experiments, were conducted to assess possible removal processes. Sediment core samples were collected from detention ponds receiving urban runoff. These cores were analyzed for phosphorus at different layers including accumulated top sediments and the lower parent soil beneath it at a depth of 1, 3, 5, 10 and greater than 10 cm. The phosphorus accumulation rate was found to decline with calculated overflow rates from an average storm. Also attenuation of phosphorus with sediment depth followed an exponential …
Design And Construction Of Maintainable Knowledge Bases Through Effective Use Of Entity-Relationship Modeling Techniques, William Yancey Pike
Design And Construction Of Maintainable Knowledge Bases Through Effective Use Of Entity-Relationship Modeling Techniques, William Yancey Pike
Retrospective Theses and Dissertations
The use of an accepted logical database design tool, Entity-Relationship Diagrams (E-RD), is explored as a method by which conceptual and pseudo-conceptual knowledge bases may be designed. Extensions to Peter Chen's classic E-RD method which can model knowledge structure used by knowledge-based applications are explored. The use of E-RDs to design knowledge bases is proposed as a two-stage process. In the first stage, and E-RD, termed the Essential E-RD, is developed of the realm of the problem or enterprise being modeled. The Essential E-RD is completely independent of any knowledge representation model (KRM) and is intended for the understanding of …
Consumption And Loss Of Formaldehyde In Electroless Copper Plating, Peter John F. Sutch
Consumption And Loss Of Formaldehyde In Electroless Copper Plating, Peter John F. Sutch
Retrospective Theses and Dissertations
The objectives of this research were to quantify formaldehyde consumption due to plating and parasitic reactions and determine the magnitude and distribution of formaldehyde losses from the electroless copper plating process. Plating and rinse bath samples obtained from three electroless copper plating operations were analyzed for formaldehyde and copper in order to develop a mass balance analysis about the plating bath for periods of active production and no production. Fugitive air and stack releases of formaldehyde were estimated using emission factors developed from air sampling at the three facilities. It was determined that approximately 90% of the formaldehyde added to …
A Design For Implementing A Simulation For Training School Principals In Decision-Making Utilizing Videodisc Technology, Robert Henry Wright
A Design For Implementing A Simulation For Training School Principals In Decision-Making Utilizing Videodisc Technology, Robert Henry Wright
Retrospective Theses and Dissertations
The purpose of the study was to design a simulation using a personal computer-based authoring system that could serve as a vehicle for investigating decision-making styles of educational administrators. The program was designed to be used at the graduate level for students seeking advanced degrees in educational leadership. The simulation makes use of simulation techniques for controlling presentation of material and data collection for subsequent analysis about information search and utilization procedures of administrators. The study was undertaken to demonstrate that nontechnical personnel using state-of-the-art technology could develop affordable and effective multimedia simulations. The study was also designed to demonstrate …