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Title: Silicone (RTV) sealant bonded aluminum joints: An experimental study.
Creator: Antony, Melvin., Florida Atlantic University, Hartt, William H.
Abstract/Description: The performance of adhesively bonded joints in terms of strength, sealing capacity and environmental resistance is of concern to designers in many fields including the marine industry. In the present work floating roller peel tests were utilized to study the bond properties of aluminum-silicone (RTV) joints. An attempt was made to identify the factors that affect the joint strength. Experiments revealed that peel strength increased with sealant thickness and decreased at high peel rates....
Show moreThe performance of adhesively bonded joints in terms of strength, sealing capacity and environmental resistance is of concern to designers in many fields including the marine industry. In the present work floating roller peel tests were utilized to study the bond properties of aluminum-silicone (RTV) joints. An attempt was made to identify the factors that affect the joint strength. Experiments revealed that peel strength increased with sealant thickness and decreased at high peel rates. Organo-silane primer SS4044 was found to improve the weatherability and strength of the joint. Results point out that mechanical interlocking combined with chemical alteration of the substrate surface was responsible for this improved adhesion. Combinations of three different environmental parameters were studied, and it was shown that seawater was the most hostile single type and a combined exposure to seawater and UV radiation (to simulate a marine environment) proved to be the worst overall. Tests showed that relaxation was governed by sealant thickness alone and was not affected by the marine environment.
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Date Issued: 1991
PURL: http://purl.flvc.org/fcla/dt/14711
Subject Headings: Aluminum--Bonding, Sealing compounds, Strength of materials
Format: Document (PDF)

Title: USING A SYNCHRONOUS SYSTEM ARCHITECTURE TO BUILD A LOW COST GRAPHICS TERMINAL.
Creator: DEAN, MARK EDWARD., Florida Atlantic University, Marcovitz, Alan B.
Abstract/Description: Computer generated graphics has become an integral part of most computer systems. Communicating information in an interesting and understandable manner has become a necessity in the computer industry due to the increase in users who are interested in animation, simulation, graphical design, games and graphic representations of complex mathematical information. The Synchronous System Architecture described in this paper will illustrate a simple, low cost and efficient means of creating and...
Show moreComputer generated graphics has become an integral part of most computer systems. Communicating information in an interesting and understandable manner has become a necessity in the computer industry due to the increase in users who are interested in animation, simulation, graphical design, games and graphic representations of complex mathematical information. The Synchronous System Architecture described in this paper will illustrate a simple, low cost and efficient means of creating and displaying images on a cathode ray tube (CRT). A step-by-step design procedure is presented which utilizes the Synchronous System Architecture (SSA) in a standalone system/terminal environment. Finally, the software alogrithms used in the system will be outlined and discussed.
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Date Issued: 1982
PURL: http://purl.flvc.org/fcla/dt/14100
Subject Headings: Computer graphics
Format: Document (PDF)

Title: USING A SUPERPROCESS TO ACCELERATE CONVERSATIONS FOR FAULT-TOLERANT CONCURRENT SOFTWARE.
Creator: GAO, LIXIN., Florida Atlantic University, Fernandez, Eduardo B.
Abstract/Description: Since computer systems are applied to many critical areas, fault-tolerance is a necessary requirement for their operation. Many techniques for dealing with hardware faults have been developed. Fault-tolerant software has had a much slower progress. Concurrent software adds an additional dimension to the problem of fault-tolerant software. This thesis uses an intermediate structure between two major schemes, conversation and programmer transparent coordination. The scheme proposed here...
Show moreSince computer systems are applied to many critical areas, fault-tolerance is a necessary requirement for their operation. Many techniques for dealing with hardware faults have been developed. Fault-tolerant software has had a much slower progress. Concurrent software adds an additional dimension to the problem of fault-tolerant software. This thesis uses an intermediate structure between two major schemes, conversation and programmer transparent coordination. The scheme proposed here accelerates conversations by using a special process or superprocess, which is executed on the same system level as the run-time system, and that by having access to the history of all interprocess communications can allow a process that passes its acceptance test to proceed conditionally. If the process does not pass its acceptance test all processes recover immediately without waiting to get to their acceptance tests. This work presents a set of algorithms to implement these ideas.
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Date Issued: 1987
PURL: http://purl.flvc.org/fcla/dt/14398
Subject Headings: Fault-tolerant computing
Format: Document (PDF)

Title: Using color image processing techniques to improve the performance of content-based image retrieval systems.
Creator: Costa, Fabio Morais., Florida Atlantic University, Furht, Borko
Abstract/Description: A Content-Based Image Retrieval (CBIR) system is a mechanism intended to retrieve a particular image from a large image repository without resorting to any additional information about the image. Query-by-example (QBE) is a technique used by CBIR systems where an image is retrieved from the database based on an example given by the user. The effectiveness of a CBIR system can be measured by two main indicators: how close the retrieved results are to the desired image and how fast we got those...
Show moreA Content-Based Image Retrieval (CBIR) system is a mechanism intended to retrieve a particular image from a large image repository without resorting to any additional information about the image. Query-by-example (QBE) is a technique used by CBIR systems where an image is retrieved from the database based on an example given by the user. The effectiveness of a CBIR system can be measured by two main indicators: how close the retrieved results are to the desired image and how fast we got those results. In this thesis, we implement some classical image processing operations in order to improve the average rank of the desired image, and we also implement two object recognition techniques to improve the subjective quality of the best ranked images. Results of experiments show that the proposed system outperforms an equivalent CBIR system in QBE mode, both from the point of view of precision as well as recall.
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Date Issued: 2001
PURL: http://purl.flvc.org/fcla/dt/12870
Subject Headings: Image processing--Digital techniques, Imaging systems--Image quality, Information storage and retrieval systems
Format: Document (PDF)

Title: Using a cerebellar model arithmetic computer (CMAC) neural network to control an autonomous underwater vehicle.
Creator: Comoglio, Rick F., Florida Atlantic University, Pandya, Abhijit S.
Abstract/Description: The design of an Autonomous Undersea Vehicle (AUV) control system is a significant challenge in-light of the highly uncertain nature of the ocean environment together with partially known nonlinear vehicle dynamics. This thesis describes a Neural Network architecture called Cerebellar Model Arithmetic Computer (CMAC). CMAC is used to control a model of an Autonomous Underwater Vehicle. The AUV model consists of two input parameters, the rudder and stern plane deflections, controlling six...
Show moreThe design of an Autonomous Undersea Vehicle (AUV) control system is a significant challenge in-light of the highly uncertain nature of the ocean environment together with partially known nonlinear vehicle dynamics. This thesis describes a Neural Network architecture called Cerebellar Model Arithmetic Computer (CMAC). CMAC is used to control a model of an Autonomous Underwater Vehicle. The AUV model consists of two input parameters, the rudder and stern plane deflections, controlling six output parameters; forward velocity, vertical velocity, pitch angle, side velocity, roll angle, and yaw angle. Properties of CMAC and results of computer simulations for identification and control of the AUV model are presented.
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Date Issued: 1991
PURL: http://purl.flvc.org/fcla/dt/14762
Subject Headings: Neural networks (Computer science), Artificial intelligence, Submersibles--Automatic control
Format: Document (PDF)

Title: THEORETICAL ANALYSIS OF HEAT EXCHANGERS IN AN OCEAN THERMAL ENERGY CONVERSION SYSTEM.
Creator: BENTON, DUDLEY JAMES., Florida Atlantic University, Tennant, Jeffrey S.
Abstract/Description: A theoretical study was conducted to determine the relationships between the major controlling factors in the heat exchangers in an Ocean Thermal Energy Conversion system. A digital computer model was developed to simulate and analyze the system. Variations in the thermophysical properties of the seawater and working fluid were considered in the analysis. Effects of variation in excess temperature differential on phase change heat transfer rates were also considered. The net power output of...
Show moreA theoretical study was conducted to determine the relationships between the major controlling factors in the heat exchangers in an Ocean Thermal Energy Conversion system. A digital computer model was developed to simulate and analyze the system. Variations in the thermophysical properties of the seawater and working fluid were considered in the analysis. Effects of variation in excess temperature differential on phase change heat transfer rates were also considered. The net power output of the system was determined from a Rankine cycle analysis. The results of this investigation show the necessity of a Rankine cycle analysis and the inclusion of fluid property variations. A significant difference can be seen in the net power output of such a system per dollar invested in the heat exchangers projected by this analysis and the analysis of other investigators which have not considered these factors.
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Date Issued: 1977
PURL: http://purl.flvc.org/fcla/dt/13875
Subject Headings: Heat exchangers--Fluid dynamics, Ocean thermal power plants
Format: Document (PDF)

Title: Utilizing "bills" for drag reduction below transition on spherical bodies.
Creator: Adamson, James Edward., Florida Atlantic University, Tennant, Jeffrey S.
Abstract/Description: Russian experimenters Kozlov and Leonenko have reported substantial drag reduction on a sphere using a "bill" or "spike" extending from the body upstream into the flow. A systematic series of experiments was conducted to determine the extent of the reduction and to identify the parameters of the reported drag reduction effect. The tests were performed in the Florida Atlantic University Ocean Engineering Department's Aerolab wind tunnel. A sphere was fitted with tapering bills of various...
Show moreRussian experimenters Kozlov and Leonenko have reported substantial drag reduction on a sphere using a "bill" or "spike" extending from the body upstream into the flow. A systematic series of experiments was conducted to determine the extent of the reduction and to identify the parameters of the reported drag reduction effect. The tests were performed in the Florida Atlantic University Ocean Engineering Department's Aerolab wind tunnel. A sphere was fitted with tapering bills of various lengths, base diameters, and bill/sphere fillet radii. Experiments indicated that the effect was restricted to Reynolds numbers below 4.0 x 10^5 and that the drag of the sphere/spike combination was actually increased at Reynolds numbers greater than this. A smoke generator was used to visualize the drag reduction mechanism, which appears to be a recirculating cell at the base of the sphere/spike intersection.
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Date Issued: 1989
PURL: http://purl.flvc.org/fcla/dt/14514
Subject Headings: Drag (Aerodynamics), Wind tunnel models
Format: Document (PDF)

Title: Turbulence modeling and simulation and related effects on helicopter response with wake dynamics using finite elements and parallelism.
Creator: Dang, Ying Yi., Florida Atlantic University, Gaonkar, Gopal H.
Abstract/Description: Future helicopters will require all-weather capability for stabilized flight through severe atmospheric turbulence. This requirement has brought into focus the effect of turbulence on handling qualities. Accordingly, there is renewed interest in modeling and simulating turbulence and predicting turbulence-induced rotor oscillations. This thesis addresses three fundamental aspects of the problem: (1) modeling and simulation of turbulence including cross-correlation; (2) three-dimensional...
Show moreFuture helicopters will require all-weather capability for stabilized flight through severe atmospheric turbulence. This requirement has brought into focus the effect of turbulence on handling qualities. Accordingly, there is renewed interest in modeling and simulating turbulence and predicting turbulence-induced rotor oscillations. This thesis addresses three fundamental aspects of the problem: (1) modeling and simulation of turbulence including cross-correlation; (2) three-dimensional dynamic-wake effects on rotor response to turbulence and (3) prediction of turbulence and response statistics. The analysis is based on the theory of isotropic and homogeneous turbulence and Taylor's frozen-field approximation. Quasisteady airfoil aerodynamics and a three-dimensional wake are used. Both the isolated blades and isolated rotors are treated. The parallelization is carried out on a massively parallel MasPar SIMD computer. Major conclusions include: (i) The effects of cross-correlation are negligible when two stations lie on the same blade and appreciable when two stations lie on different blades. (ii) In modeling the three-dimensional wake, 3 harmonics are required and dynamic wake has dominant influence on response statistics. (iii) With increasing comprehensiveness of helicopter-turbulence modeling, the sequential execution times increase dramatically; by comparison, the parallel execution times are far lower and, more significantly, remain nearly constant.
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Date Issued: 1995
PURL: http://purl.flvc.org/fcla/dt/15117
Subject Headings: Helicopters, Turbulence, Rotors (Helicopters), Boundary layer noise
Format: Document (PDF)

Title: Two-dimensional approximation and learning control of robot manipulators.
Creator: Gautam, Ashutosh., Florida Atlantic University, Zilouchian, Ali
Abstract/Description: In this thesis, a novel two-dimensional learning control scheme for robot manipulators is proposed. The convergence of the scheme for a general n-degree of freedom robot is shown. In the next part of the thesis, an algorithm for the approximation of a two-dimensional causal, recursive, separable-in-denominator (CRSD) filter, using the impulse response and autocorrelation data, is presented. The stability of the designed filter is discussed and it is shown that the approximated filter is...
Show moreIn this thesis, a novel two-dimensional learning control scheme for robot manipulators is proposed. The convergence of the scheme for a general n-degree of freedom robot is shown. In the next part of the thesis, an algorithm for the approximation of a two-dimensional causal, recursive, separable-in-denominator (CRSD) filter, using the impulse response and autocorrelation data, is presented. The stability of the designed filter is discussed and it is shown that the approximated filter is always stable. The simulation results for the approximation technique as well as the two-dimensional learning control scheme are also included in the thesis.
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Date Issued: 1989
PURL: http://purl.flvc.org/fcla/dt/14559
Subject Headings: Control theory, Manipulators (Mechanism), Robots
Format: Document (PDF)

Title: Tree-based classification models for analyzing a very large software system.
Creator: Bullard, Lofton A., Florida Atlantic University, Khoshgoftaar, Taghi M.
Abstract/Description: Software systems that control military radar systems must be highly reliable. A fault can compromise safety and security, and even cause death of military personnel. In this experiment we identify fault-prone software modules in a subsystem of a military radar system called the Joint Surveillance Target Attack Radar System, JSTARS. An earlier version was used in Operation Desert Storm to monitor ground movement. Product metrics were collected for different iterations of an operational...
Show moreSoftware systems that control military radar systems must be highly reliable. A fault can compromise safety and security, and even cause death of military personnel. In this experiment we identify fault-prone software modules in a subsystem of a military radar system called the Joint Surveillance Target Attack Radar System, JSTARS. An earlier version was used in Operation Desert Storm to monitor ground movement. Product metrics were collected for different iterations of an operational prototype of the subsystem over a period of approximately three years. We used these metrics to train a decision tree model and to fit a discriminant model to classify each module as fault-prone or not fault-prone. The algorithm used to generate the decision tree model was TREEDISC, developed by the SAS Institute. The decision tree model is compared to the discriminant model.
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Date Issued: 1996
PURL: http://purl.flvc.org/fcla/dt/15315
Subject Headings: Computer software--Quality control, Computer software--Reliability, Software engineering
Format: Document (PDF)

Title: Use of piezocone penetration tests for rapid in-situ characterization of Florida organic soil.
Creator: Huynh, Hieu H., Florida Atlantic University, Sobhan, Khaled
Abstract/Description: Organic soils generally are characterized by low strength and high compressibility. Visual observations of State Road 15/US 98 in western Palm Beach County, Florida indicate numerous cracking and significant rutting and raveling along the roadway caused by the consolidation and long-term secondary compression of the organic soils due to soil and pavement dead load. Since sampling of undisturbed soft organic soils is difficult, and subsequent laboratory tests are expensive and time-consuming,...
Show moreOrganic soils generally are characterized by low strength and high compressibility. Visual observations of State Road 15/US 98 in western Palm Beach County, Florida indicate numerous cracking and significant rutting and raveling along the roadway caused by the consolidation and long-term secondary compression of the organic soils due to soil and pavement dead load. Since sampling of undisturbed soft organic soils is difficult, and subsequent laboratory tests are expensive and time-consuming, there is a need for rapid in-situ characterization of these unstable foundation soils. This study evaluates the capabilities of Piezocone Penetration tests (CPTu), coupled with pore pressure dissipation tests, for estimating the strength, modulus, compressibility, and time rate of consolidation characteristics of organic soils and peat in Florida. The compression index (Cc) and coefficient of consolidation (cv), predicted from CPTu, showed reasonable correlation with laboratory-derived properties.
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Date Issued: 2006
PURL: http://purl.flvc.org/fcla/dt/13379
Subject Headings: Soil stabilization--Florida, Soil consolidation--Florida, Soil mechanics--Florida, Soil penetration test
Format: Document (PDF)

Title: Proceedings of the ... Conference on Recent Advances in Robotics.
Creator: Conference on Recent Advances in Robotics (Boca Raton), Florida Atlantic University
PURL: http://purl.flvc.org/fau/fd/FAadvancerob
Subject Headings: Robotics -- Congresses
Format: Serial

Title: Transducer design for underwater acoustic communications using the finite element method.
Creator: Jacquemin, Jean-Philippe M. J., Florida Atlantic University, LeBlanc, Lester R.
Abstract/Description: The behavior of radially polarized free-flooded ring (FFR) transducers is studied for application in underwater acoustic communications. Theoretical models are first presented. Then the finite element method (FEM) is introduced and a FEM model for the FFR transducer is proposed. Experimental data are collected and compared to the simulation results with good correspondence. A series of FEM simulations lead then to optimum geometrical parameters for a fine-tuned FFR transducer dedicated to...
Show moreThe behavior of radially polarized free-flooded ring (FFR) transducers is studied for application in underwater acoustic communications. Theoretical models are first presented. Then the finite element method (FEM) is introduced and a FEM model for the FFR transducer is proposed. Experimental data are collected and compared to the simulation results with good correspondence. A series of FEM simulations lead then to optimum geometrical parameters for a fine-tuned FFR transducer dedicated to underwater acoustic communications. Finally, stack transducers models and the piezocomposite technology are presented as possible improvement of the present transducer.
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Date Issued: 2001
PURL: http://purl.flvc.org/fcla/dt/12758
Subject Headings: Underwater acoustics, Finite element method, Transducers, Interdigital
Format: Document (PDF)

Title: Stem cell harvesting protocol research in autologous transplantation setting: Large volume vs. conventional cytapheresis.
Creator: Balint, Bela, Ljubenov, Marika, Stamatovic, Dragana, Todorovic, Milena, Pavlovic, Mirjana, Ostojic, Gordana, Jocic, Miodrag, Trkuljic, Miroljub
Abstract/Description: Background/Aim. The use of peripheral blood as a source of hematopoietic stem cells (SCs) is progressively increasing and has nearly supplanted bone marrow transplantation. Interpatient variability in the degree and kinetics of SC mobilization into peripheral blood is an expected event after conventional chemotherapy–based treatment, followed by sequential administration of recombinant granulocyte–colony– stimulating factor (rHu–CSF). In this study, specific factors associated with the...
Show moreBackground/Aim. The use of peripheral blood as a source of hematopoietic stem cells (SCs) is progressively increasing and has nearly supplanted bone marrow transplantation. Interpatient variability in the degree and kinetics of SC mobilization into peripheral blood is an expected event after conventional chemotherapy–based treatment, followed by sequential administration of recombinant granulocyte–colony– stimulating factor (rHu–CSF). In this study, specific factors associated with the application of two different SC–harvesting approaches, including the use of large volume leukapheresis (LVL) vs. repetitive conventional apheresis (RCA), were analyzed. The basic goal of the study was to evaluate the influence of apheresis protocol (collection timing, processed blood volume and cell yield) upon the clinical outcome of transplantation. Methods. Results obtained by LVL (76 pts) and RCA (20 pts – control group) were compared. The SC mobilizing regimen used was cyclophosphamide (4–7 g/m^2) or polychemotherapy and rHuG–CSF 10–16 μg/kg of body mess (bm) per day. Cell harvesting was performed using COBE-Spectra (Caridian–BCT, USA). The volume of processed blood in LVL setting was ≥ 3.5 – fold of the patient's circulating blood quantity (ranged from 12.7 to 37.8 l). All patients tolerated well the use of intensive treatment, without any side or adverse effects. Our original controlled–rate cryopreservation was carried out with 10% dimethyl sulfoxide (DMSO) using Planer R203/200R or Planer 560–16 equipments (Planer Products Ltd, UK). Total nucleated cell (NC) and mononuclear cell (MNC) counts were examined by flow cytometry (Advia–2120 Bayer, Germany; Technicon H–3 System, USA). The CD34+ cell surface antigen was investigated by the EPICS XL–MCL device (Coulter, Germany). Results. Performing LVL–apheresis, high–level MNC and CD34+ cell yields (7.6±4.6 × 10^8/kg bm and 11.8±6.5 × 10^6/kg bm, respectively) were obtained. As a result, rapid hematopoietic reconstitution ("graft–healing") – on the 9.4th and 12.4th day for granulocytes and platelets, respectively was achieved. Using repetitive conventional apheresis (2–3 procedures), the total MNC count was high (8.2±7.0 × 10^8/kg bm), but the total CD34+ yield was lower 10.8±9.9 due to inferior CD34+ vs. MNC ratio. Conclusion. The results obtained suggest that well–timed LVL–apheresis increased SC–yield in cell harvest, resulting in faster bone marrow repopulation and hematological reconstitution, as well as better overall clinical outcome of transplantation. These results necessitate additional examinations of CD34+ subsets ratio in cell harvest.
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Date Issued: 2008
PURL: http://purl.flvc.org/fau/fd/FAUIR000042
Format: Citation

Title: FAU Climate Change Initiative Priority Theme: Research, Engineering, and Adaption to a Change Climate.
Creator: Berry, Leonard, Koch, Marguerite, Center for Environmental Studies, Benscoter, Brian, Comas, Xavier, Devlin, Donna, Fadiman, Maria, Gerstein, E., Herzing, Denise L., Hindle, Tobin, Milton, Sarah L., Oleinik, Anton E., Proffitt, C. Edward, Restrepo, Jorge I., Root, Tara L., Wyneken, Jeanette, Xie, Zhixiao, Zhang, Xing-Hai, Esnard, Ann-Margaret, Mitsova, Diana, Murley, J., Vos, J., Escaleras, Monica, Mehallis, M., Shaw, Eric H., Hardman, Guillermo [John], Lambert, Julie, Thomas, G., Arockiasamy, Madasamy, Bloetscher, Frederick, Carvalho, G., Dhanak, Manhar R., Frisk, George V., Kaisar, Evangelos I., Kalva, Hari, Meeroff, Daniel E., Rodriguez, Jarice, Scarlatos, Panagiotis (Pete) D., Shankar, Ravi, Teegavarapu, Ramesh, Brown, Clifford T., McAfee, Francis, Widener, Patricia, Dalgleish, Fraser R., Hanisak, M. Dennis, McMulloch, S., O'Corry-Crowe, Gregory, Pomponi, Shirley A., Reed, John K., Scarpa, John, Voss, Joshua, Heimlich, Barry N., Alvarez, R., Jolley, J., Edwards, A., Charles E. Schmidt College of Science, Harbor Branch Oceanographic Institute, College of Business, Dorothy F. Schmidt College of Arts and Letters, College of Education, College of Engineering and Computer Science
Date Issued: 2010
PURL: http://purl.flvc.org/fau/fd/FA00003457
Format: Citation

Title: Numerical simulations of a horizontal axis water turbine designed for underwater mooring platforms.
Creator: Tian, Wenlong, Song, Baowei, VanZwieten, James H., Pyakurel, Parakram, Li, Yanjun
Date Issued: 2016-01
PURL: http://purl.flvc.org/fau/fd/FAUIR000223
Format: Citation

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