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- Title
- Resource-sensitive intrusion detection models for network traffic.
- Creator
- Abushadi, Mohamed E., Florida Atlantic University, Khoshgoftaar, Taghi M.
- Abstract/Description
-
Network security is an important subject in today's extensively interconnected computer world. The industry, academic institutions, small and large businesses and even residences are now greatly at risk from the increasing onslaught of computer attacks. Such malicious efforts cause damage ranging from mere violation of confidentiality and issues of privacy up to actual financial loss if business operations are compromised, or even further, loss of human lives in the case of mission-critical...
Show moreNetwork security is an important subject in today's extensively interconnected computer world. The industry, academic institutions, small and large businesses and even residences are now greatly at risk from the increasing onslaught of computer attacks. Such malicious efforts cause damage ranging from mere violation of confidentiality and issues of privacy up to actual financial loss if business operations are compromised, or even further, loss of human lives in the case of mission-critical networked computer applications. Intrusion Detection Systems (IDS) have been used along with the help of data mining modeling efforts to detect intruders, yet with the limitation of organizational resources it is unreasonable to inspect every network alarm raised by the IDS. Modified Expected Cost of Misclassification ( MECM) is a model selection measure that is resource-aware and cost-sensitive at the same time, and has proven to be effective for the identification of the best resource-based intrusion detection model.
Show less - Date Issued
- 2003
- PURL
- http://purl.flvc.org/fcla/dt/13054
- Subject Headings
- Computer networks--Security measures--Automation, Computers--Access control, Data mining, Computer security
- Format
- Document (PDF)
- Title
- Response of a cascade of blades to an incoming turbulent flow.
- Creator
- Bocquillion, Olivier Christophe., Florida Atlantic University, Glegg, Stewart A. L.
- Abstract/Description
-
The purpose of this research is to study the modification of a turbulent flow as it passes through a cascade of flat plates. The results will then be compared with experimental results obtained in a companion experimental study being conducted at Virginia Tech. In a typical marine propulsor turbulent flow passes through a set of inlet guide vanes (IGVs) and then interacts with the propeller blades: this process creates unwanted vibration and sound. The purpose of this research is to determine...
Show moreThe purpose of this research is to study the modification of a turbulent flow as it passes through a cascade of flat plates. The results will then be compared with experimental results obtained in a companion experimental study being conducted at Virginia Tech. In a typical marine propulsor turbulent flow passes through a set of inlet guide vanes (IGVs) and then interacts with the propeller blades: this process creates unwanted vibration and sound. The purpose of this research is to determine if the arrangement of the IGVs can be used to reduce the propulsor noise generation. In this study the incoming flow to the propeller is modeled as homogeneous turbulence and the IGVs are represented by a cascade of flat plates. We will consider the equations, which describe the blade response to an incoming harmonic gust, and we will represent the turbulent flow using a modal description.
Show less - Date Issued
- 2003
- PURL
- http://purl.flvc.org/fcla/dt/12971
- Subject Headings
- Blades, Turbulence, Cascades (Fluid dynamics)
- Format
- Document (PDF)
- Title
- STUDY OF THE WIDE-BAND SPECTRUM FATIGUE ON WELDED OFFSHORE STRUCTURES.
- Creator
- CHU, ZIN-HON., Florida Atlantic University, Hartt, William H.
- Abstract/Description
-
In the present research butt welded ABS DH-32 steel specimens were fatigue tested under freely corroding and cathodic protection conditions by a time-series simulated wide-band spectra of a North Sea wave climate. Previous research pertaining to the probabilistic features of wave dynamics, wave force models, Markov-Chain sea state evolution and time-series simulation of wide-band spectra are addressed as a background review. The resulting freely corroding data are discussed on the basis of...
Show moreIn the present research butt welded ABS DH-32 steel specimens were fatigue tested under freely corroding and cathodic protection conditions by a time-series simulated wide-band spectra of a North Sea wave climate. Previous research pertaining to the probabilistic features of wave dynamics, wave force models, Markov-Chain sea state evolution and time-series simulation of wide-band spectra are addressed as a background review. The resulting freely corroding data are discussed on the basis of the SN plot which developed from the previous investigations at FAU. Calculation of the damage of failed specimens by employing the "Equivalent Narrow-Band Approach" resulted in excellent agreement with the linear damage summation assumption.
Show less - Date Issued
- 1985
- PURL
- http://purl.flvc.org/fcla/dt/14266
- Subject Headings
- Steel--Fatigue, Steel--Corrosion
- Format
- Document (PDF)
- Title
- Non-separable two dimensional wavelets and their filter banks in polar coordinates.
- Creator
- Andric, Oleg., Florida Atlantic University, Erdol, Nurgun
- Abstract/Description
-
The problems encountered in development and implementation of orthonormal two dimensional wavelet bases and their filter banks in polar coordinates are addressed. These wavelets and filter banks have possible applications in processing signals that are collected by sensors working in the polar coordinate system, such as biomedical and radar generated signals. The relationship between the space of measurable, square-integrable functions on the punctured polar coordinate system L^2(P) and space...
Show moreThe problems encountered in development and implementation of orthonormal two dimensional wavelet bases and their filter banks in polar coordinates are addressed. These wavelets and filter banks have possible applications in processing signals that are collected by sensors working in the polar coordinate system, such as biomedical and radar generated signals. The relationship between the space of measurable, square-integrable functions on the punctured polar coordinate system L^2(P) and space of measurable, square-integrable functions on the rectangular plane L^2(R^2) is developed. This allows us to develop complete wavelet bases in a more convenient and familiar surrounding of L^2(R^2) and to transport this theory to L^2(P). Corresponding filter banks are also developed. The implementation of wavelet analysis of punctured polar plane is discussed. An example of wavelet bases, filter banks, and implementation is provided.
Show less - Date Issued
- 1995
- PURL
- http://purl.flvc.org/fcla/dt/15190
- Subject Headings
- Wavelets (Mathematics), Coordinates, Polar, Signal processing--Mathematical models
- Format
- Document (PDF)
- Title
- Novel multiplexer-based architectures for full adder design.
- Creator
- Al-Sheraidah, Abdulkarim K., Florida Atlantic University, Wang, Yuke
- Abstract/Description
-
We propose five new Multiplexer-Based architectures for 1-bit full adder design. Using a 2-transistors multiplexer gate to implement the first architecture, we are able to produce a 12-transistor full adder cell, Comparing it to four different 10-transistors low-power full adder cells reported previously in literature, the new adder cell named MBA1-12T out performs all of them in power consumption and speed. By implementing those architectures using the 2-input CMOS multiplexer with pass...
Show moreWe propose five new Multiplexer-Based architectures for 1-bit full adder design. Using a 2-transistors multiplexer gate to implement the first architecture, we are able to produce a 12-transistor full adder cell, Comparing it to four different 10-transistors low-power full adder cells reported previously in literature, the new adder cell named MBA1-12T out performs all of them in power consumption and speed. By implementing those architectures using the 2-input CMOS multiplexer with pass-gates, five new high-performance full adder cells are obtained. Those new adder cells are tested along with the conventional 28-transistor CMOS adder cell. Testing results shows that the new adder cells have higher speed and lower power delay product values than the conventional 28-transistor CMOS adder cell.
Show less - Date Issued
- 2000
- PURL
- http://purl.flvc.org/fcla/dt/12667
- Subject Headings
- Metal oxide semiconductors, Complementary, Digital integrated circuits
- Format
- Document (PDF)
- Title
- TRANSMISSION-LINE-MATRIX MODELING OF INHOMOGENEOUS RECTANGULAR WAVEGUIDES AND CAVITIES.
- Creator
- Agba, Lawrence C., Florida Atlantic University, Sadiku, Matthew
- Abstract/Description
-
Fortran algorithms were developed to analyze inhomogeneous rectangular waveguides and cavities using the method of transmission-line-matrix. These algorithms were used specifically to determine the field components, impedances, modes, and power decay rates. The computations were done in one, two or three space dimensions and time. Results obtained were compared with analytical results, where possible. In general, the results were found to be in better agreement with the analytical results...
Show moreFortran algorithms were developed to analyze inhomogeneous rectangular waveguides and cavities using the method of transmission-line-matrix. These algorithms were used specifically to determine the field components, impedances, modes, and power decay rates. The computations were done in one, two or three space dimensions and time. Results obtained were compared with analytical results, where possible. In general, the results were found to be in better agreement with the analytical results than the results obtained using other numerical method.
Show less - Date Issued
- 1987
- PURL
- http://purl.flvc.org/fcla/dt/14378
- Subject Headings
- Electromagnetic waves--Mathematical models
- Format
- Document (PDF)
- Title
- Target signature for a periodic structure using a low-frequency broadband side-scan simulator.
- Creator
- Dietz, Jerrold Edward Gilbert., Florida Atlantic University, LeBlanc, Lester R.
- Abstract/Description
-
Many acoustic targets of interest contain features that are periodic in space. This thesis demonstrates that a chirp waveform, 2 kHz to 12 kHz, can detect repetitive structures with periods in the range of 0.125 m to 0.75 m. As aspect angle increases from 0 deg to 90 deg, a frequency shift in the range of 830 Hz to 4800 Hz will occur as the period decreases from 0.75 to 0.125 m. It follows that, spectral analysis can aid in target identification. A sonar propagation model has been developed...
Show moreMany acoustic targets of interest contain features that are periodic in space. This thesis demonstrates that a chirp waveform, 2 kHz to 12 kHz, can detect repetitive structures with periods in the range of 0.125 m to 0.75 m. As aspect angle increases from 0 deg to 90 deg, a frequency shift in the range of 830 Hz to 4800 Hz will occur as the period decreases from 0.75 to 0.125 m. It follows that, spectral analysis can aid in target identification. A sonar propagation model has been developed to simulate the acoustic backscattered energy of a target with periodic characteristics in the presence of seafloor scattering. Examining the spectral components, with appropriate time gating, can achieve a gain of 7 dB at 3100 m.
Show less - Date Issued
- 2001
- PURL
- http://purl.flvc.org/fcla/dt/12788
- Subject Headings
- Sidescan sonar, Underwater acoustics, Scattering (Physics)
- Format
- Document (PDF)
- Title
- TWO-DIMENSIONAL MODELING OF A SOLAR POND.
- Creator
- CANCIO, GUILLERMO LEOPOLDO., Florida Atlantic University, Duyar, Ahmet
- Abstract/Description
-
A two-dimensional mathematical model is developed to analyze the thermal behavior of salt gradient solar ponds. This model can be used to evaluate the suitability of solar ponds for space heating and power generation as well as the thermal storage capability of the ground. The solar pond model adopted consists of an upper nonconvective zone and a lower convective zone. This model incorporates detailed representation of surface and ground heat losses. Solutions to the energy equation are...
Show moreA two-dimensional mathematical model is developed to analyze the thermal behavior of salt gradient solar ponds. This model can be used to evaluate the suitability of solar ponds for space heating and power generation as well as the thermal storage capability of the ground. The solar pond model adopted consists of an upper nonconvective zone and a lower convective zone. This model incorporates detailed representation of surface and ground heat losses. Solutions to the energy equation are obtained for both the pond and the ground. The energy equation for the lower convective zone is used to determine the energy that can be extracted from the pond.
Show less - Date Issued
- 1984
- PURL
- http://purl.flvc.org/fcla/dt/14174
- Subject Headings
- Solar ponds, Energy storage
- Format
- Document (PDF)
- Title
- Theory of and a novel approach to high-stability frequency control circuits.
- Creator
- Brunell, David J., Florida Atlantic University, Bagby, Jonathan S.
- Abstract/Description
-
Portable, wireless devices have become ubiquitous, and ever-increasing requirements of functionality and reliability are being placed upon these devices. There is a need to accommodate the oft-conflicting requirements of small size, low power consumption, low cost, and extremely accurate control of frequency. To address these RF design requirements, a comprehensive survey of existing frequency-control methods is presented, followed by a novel design which accomplishes a high degree of...
Show morePortable, wireless devices have become ubiquitous, and ever-increasing requirements of functionality and reliability are being placed upon these devices. There is a need to accommodate the oft-conflicting requirements of small size, low power consumption, low cost, and extremely accurate control of frequency. To address these RF design requirements, a comprehensive survey of existing frequency-control methods is presented, followed by a novel design which accomplishes a high degree of frequency accuracy through the use of direct digital synthesis and a software seeking algorithm. The proposed design can be implemented pursuant to the requirements of current and future portable wireless devices.
Show less - Date Issued
- 2001
- PURL
- http://purl.flvc.org/fcla/dt/12819
- Subject Headings
- Frequency synthesizers, Automatic frequency control, Oscillators, Crystal
- Format
- Document (PDF)
- Title
- Varactors, crystals, and their use in voltage controlled oscillators.
- Creator
- Fenton, Eliot Darrel., Florida Atlantic University, Ungvichian, Vichate
- Abstract/Description
-
This thesis investigates the characteristics of varactors and crystals that affect Q and therefore the frequency stability of a voltage controlled oscillator (vco) when employed in a one MHz to three hundred MHz frequency synthesizer. A low noise VHF crystal oscillator, a low noise common base UHF oscillator, and a low noise test set-up are described, built, and tested.
- Date Issued
- 1991
- PURL
- http://purl.flvc.org/fcla/dt/14676
- Subject Headings
- Oscillators, Electric, Oscillators, Crystal
- Format
- Document (PDF)
- Title
- VIBRATION ANALYSIS OF RECTANGULAR PLATES WITH COMPLETE AND PARTIAL CONSTRAINED-LAYER DAMPING TREATMENTS.
- Creator
- HSU, HONG-YUAN., Florida Atlantic University, Stevens, Karl K.
- Abstract/Description
-
A theoretical analysis for predicting the system loss factors and natural frequencies of rectangular plates with complete and partial constrained-layer damping treatments has been presented. This analysis is based upon an energy approach to the free vibration of plates. Results predicted were compared with those from experiments. Satisfactory agreement has been reached. Both the theoretical and the experimental results presented in this thesis indicate clearly that partial constrained-layer...
Show moreA theoretical analysis for predicting the system loss factors and natural frequencies of rectangular plates with complete and partial constrained-layer damping treatments has been presented. This analysis is based upon an energy approach to the free vibration of plates. Results predicted were compared with those from experiments. Satisfactory agreement has been reached. Both the theoretical and the experimental results presented in this thesis indicate clearly that partial constrained-layer damping treatments can provide effective, or even superior, amounts of damping, and that their use can lead to significant savings in material costs and weight.
Show less - Date Issued
- 1983
- PURL
- http://purl.flvc.org/fcla/dt/14160
- Subject Headings
- Damping (Mechanics), Vibration, Plates (Engineering)--Vibration
- Format
- Document (PDF)
- Title
- A VLSI NMOS IMPLEMENTATION OF A BUILDING BLOCK PROCESSOR USING CORDIC ALGORITHMS (ARRAY PROCESSOR).
- Creator
- GIVEN, RAYMOND E., Florida Atlantic University, Shankar, Ravi
- Date Issued
- 1985
- PURL
- http://purl.flvc.org/fcla/dt/14247
- Subject Headings
- Array processors, Signal processing
- Format
- Document (PDF)
- Title
- Warehousing simulator design.
- Creator
- Aziz, Nibal Tawfiq., Florida Atlantic University, Mazouz, Abdel Kader
- Abstract/Description
-
Warehousing System is a complex problem, requiring simultaneous consideration of a large number of intricately related issues. In this research author focuses on the computerization opportunities that are unique in maintaining smooth storage and retrieval operations and recouping a controlled inventory status of a warehouse system. The main objective in this research is to define how layout decisions can both depend on warehouse's operations and effect inventory control decisions of a...
Show moreWarehousing System is a complex problem, requiring simultaneous consideration of a large number of intricately related issues. In this research author focuses on the computerization opportunities that are unique in maintaining smooth storage and retrieval operations and recouping a controlled inventory status of a warehouse system. The main objective in this research is to define how layout decisions can both depend on warehouse's operations and effect inventory control decisions of a warehouse system. Author had defined, designed and implemented a simulated warehousing system using SIMAN. In particular, author uses simulation modeling as an approach to analyze layout design and operations of a warehouse system. Also, author had developed a database management systems software application using dBase IV. This relational database is used to dynamically forecast inventory level. A case study is used as a test bed to verify and validate the work done.
Show less - Date Issued
- 1995
- PURL
- http://purl.flvc.org/fcla/dt/15152
- Subject Headings
- Warehouses--Designs and plans, Inventory control, Physical distribution of goods, Materials handling, Simulation methods
- Format
- Document (PDF)
- Title
- Water tables and drainage uniformity in the Everglades Agricultural Area.
- Creator
- Garcia, Raymond Michael., Florida Atlantic University, Scarlatos, Panagiotis (Pete) D.
- Abstract/Description
-
Drainage waters leaving the Everglades Agricultural Area (EAA) have been implicated as having adverse effects on the receiving Water Conservation Areas (WCAs) and Everglades National Park (ENP). The objectives were to quantify and describe the rainfall and drainage events, characterize their effects on the water table system, and determine any relationships between the open channel drainage system and the field water tables on farms in the EAA. Water table rise in the soil profile from...
Show moreDrainage waters leaving the Everglades Agricultural Area (EAA) have been implicated as having adverse effects on the receiving Water Conservation Areas (WCAs) and Everglades National Park (ENP). The objectives were to quantify and describe the rainfall and drainage events, characterize their effects on the water table system, and determine any relationships between the open channel drainage system and the field water tables on farms in the EAA. Water table rise in the soil profile from rainfall averaged a ratio of 10.6:1. Traditional expectations of field drainage behavior to channel gradients were not apparent. Field observation well drainage rates showed no direct relationships to distances across the farm or to the main station pumping rate. Due to the similar field water table responses under varying drainage scenarios, the organic soil, open channels, and the underlying geology were determined to function as an integrated system with respect to the movement of water.
Show less - Date Issued
- 2000
- PURL
- http://purl.flvc.org/fcla/dt/12680
- Subject Headings
- Water table--Florida--Everglades, Drainage--Florida--Everglades, Agriculture--Environmental aspects--Florida--Everglades
- Format
- Document (PDF)
- Title
- A Web-based description of design pattern representations.
- Creator
- Hendricksen, Paul A., Florida Atlantic University, Horton, Thomas
- Abstract/Description
-
Since the publication of the book Design Patterns: Elements of Reusable Object-Oriented Software by the Eric Gamma, Richard Helm, Ralph Johnson, and John Vlissides, there has been substantial interest in design patterns in the software engineering community. One of the goals of design patterns is to capture design expertise developed by some of the most experienced developers so that it can be reused even by less experienced programmers. Like other engineering disciplines, the authors...
Show moreSince the publication of the book Design Patterns: Elements of Reusable Object-Oriented Software by the Eric Gamma, Richard Helm, Ralph Johnson, and John Vlissides, there has been substantial interest in design patterns in the software engineering community. One of the goals of design patterns is to capture design expertise developed by some of the most experienced developers so that it can be reused even by less experienced programmers. Like other engineering disciplines, the authors presented their materials using a catalog format. That format can present problems for students and practitioners. As an alternative, we suggest to first replace the text-based description with a web-based description to make it easier to browse through the information. Second, we suggest using more graphical design representations for pattern descriptions to reduce the amount of necessary textual details. Using the process of reverse engineering, we recreate the original design representations of various pattern implementations. Third, we provide additional graphical representations to relate the general pattern description to specific implementations. Finally, we provide a web-based prototype of the new representation and shows how a user can take advantage of such representations.
Show less - Date Issued
- 1999
- PURL
- http://purl.flvc.org/fcla/dt/15650
- Subject Headings
- Computer software--Reusability, Object-oriented programming (Computer science)
- Format
- Document (PDF)
- Title
- Web-based academic advising system.
- Creator
- Ding, Xundong., Florida Atlantic University, Hsu, Sam, Marques, Oge
- Abstract/Description
-
Academic advising is an important and time-consuming task and different tools and techniques can be used to make it an effective and efficient process. This thesis describes the design and development of a Web-based advising system that supplements the conventional advising process. The goals of the system include: to minimize repetitive tasks performed by advisors, to encourage students to adopt a proactive attitude towards advising, to make advising-related information available to remote...
Show moreAcademic advising is an important and time-consuming task and different tools and techniques can be used to make it an effective and efficient process. This thesis describes the design and development of a Web-based advising system that supplements the conventional advising process. The goals of the system include: to minimize repetitive tasks performed by advisors, to encourage students to adopt a proactive attitude towards advising, to make advising-related information available to remote students in a single place, in electronic format, and to minimize inconsistencies in the advising process. The system supports three different types of users (students, advisors, and secretaries). This thesis proposes a new Web-based advising system model. It also presents its architecture and an implementation of a prototype. Web-based advising system introduces a new approach towards advising over the Internet. Lessons learned from various experiments of the prototype are discussed in this thesis.
Show less - Date Issued
- 2002
- PURL
- http://purl.flvc.org/fcla/dt/12880
- Subject Headings
- Counseling in higher education--Computer network resources, World Wide Web, Faculty advisors--Computer network resources
- Format
- Document (PDF)
- Title
- The assessment of bond for cathodically polarized pretensioning steel in concrete.
- Creator
- Dohlen, Knut Herman., Florida Atlantic University, Hartt, William H.
- Abstract/Description
-
Pretensioned concrete members require a certain bond strength between the steel and concrete to maintain prestress force. Previous studies have indicated that when reinforcing steel in concrete is cathodically polarized, a chemical change of the cement near the steel-concrete interface occurs; and this can reduce the bond strength. In the present research experiments were conducted with concrete specimens that contained either a non-stressed seven wire steel tendon or a single strand through...
Show morePretensioned concrete members require a certain bond strength between the steel and concrete to maintain prestress force. Previous studies have indicated that when reinforcing steel in concrete is cathodically polarized, a chemical change of the cement near the steel-concrete interface occurs; and this can reduce the bond strength. In the present research experiments were conducted with concrete specimens that contained either a non-stressed seven wire steel tendon or a single strand through the longitudinal direction. The specimens were cathodically polarized with current densities ranging between 50 and 2500 mA/m^2 of steel. Upon achieving a pre-determined charge density transfer, the steel was pulled relative to the concrete until the bond was broken. Results indicate that a total charge density transfer of up to 14000 A*h/m^2 of steel, may introduce an average 16 percent decrease in ultimate bond strength. This and other data were evaluated in order to assess if cathodic protection, as utilized for corrosion control, is likely to compromise structural integrity of pretensioned concrete members and structures.
Show less - Date Issued
- 1998
- PURL
- http://purl.flvc.org/fcla/dt/15543
- Subject Headings
- Cathodic protection, Reinforced concrete--Corrosion
- Format
- Document (PDF)
- Title
- An active-vision-based method for autonomous navigation.
- Creator
- Ergen, Erkut Erhan., Florida Atlantic University, Raviv, Daniel
- Abstract/Description
-
This research explores the existing active-vision-based algorithms employed in today's autonomous navigation systems. Some of the popular range finding algorithms are introduced and presented with examples. In light of the existing methods, an active-vision-based method, which extracts visual cues from a sequence of 2D images, is proposed for autonomous navigation. The proposed algorithm merges the method titled 'Visual Threat Cues (VTCs) for Autonomous Navigation' developed by Kundur (1),...
Show moreThis research explores the existing active-vision-based algorithms employed in today's autonomous navigation systems. Some of the popular range finding algorithms are introduced and presented with examples. In light of the existing methods, an active-vision-based method, which extracts visual cues from a sequence of 2D images, is proposed for autonomous navigation. The proposed algorithm merges the method titled 'Visual Threat Cues (VTCs) for Autonomous Navigation' developed by Kundur (1), with the structured-light-based methods. By combining these methods, a more practical and a simpler method for indoors autonomous navigation tasks is developed. A textured-pattern, which is projected onto the object surface by a slide projector, is used as the structured-light source, and the proposed approach is independent of the textured-pattern used. Several experiments are performed with the autonomous robot LOOMY to test the proposed algorithm, and the results are very promising.
Show less - Date Issued
- 1997
- PURL
- http://purl.flvc.org/fcla/dt/15425
- Subject Headings
- Autonomous robots, Automotive sensors
- Format
- Document (PDF)
- Title
- An architectural and performance characterization of distributed real-time systems.
- Creator
- Huynh, Khoa Dang., Florida Atlantic University, Fernandez, Eduardo B.
- Abstract/Description
-
We propose a methodology to effectively characterize the architecture and system performance of distributed systems designed to operate in frame-based real-time environments. Important characteristics that define the real-time performance of a distributed system are identified and classified at the hardware, operating system, and user application levels. A synthetic workload model, called the Distributed Real-Time Workload (DRTW), is designed to fully characterize a broad range of real-time...
Show moreWe propose a methodology to effectively characterize the architecture and system performance of distributed systems designed to operate in frame-based real-time environments. Important characteristics that define the real-time performance of a distributed system are identified and classified at the hardware, operating system, and user application levels. A synthetic workload model, called the Distributed Real-Time Workload (DRTW), is designed to fully characterize a broad range of real-time applications and to exercise a single- or multiple-node distributed system under measurement. A set of data collection tools to obtain empirical performance data at different levels of a distributed system is also proposed. For the purpose of illustration, these tools are used to obtain data on several real-time systems from Encore Computer Corporation.
Show less - Date Issued
- 1990
- PURL
- http://purl.flvc.org/fcla/dt/14665
- Subject Headings
- Electronic data processing--Distributed processing, Real-time data processing
- Format
- Document (PDF)
- Title
- An analytical study of a bridge system for underway replenishment.
- Creator
- Douplitzky, Karine Franci., Florida Atlantic University, Yong, Yan
- Abstract/Description
-
A folding span deployed between two ships is proposed for dry cargo transfer during replenishment operations at sea. This structure is modeled as a one-dimensional truss-work, composed of spatially periodic units. The governing equation is formulated for a single periodic unit by a finite element method. A transfer matrix method is then used to connect it to its neighboring units. The dynamic response of the structure is finally obtained by a wave propagation approach. For application to...
Show moreA folding span deployed between two ships is proposed for dry cargo transfer during replenishment operations at sea. This structure is modeled as a one-dimensional truss-work, composed of spatially periodic units. The governing equation is formulated for a single periodic unit by a finite element method. A transfer matrix method is then used to connect it to its neighboring units. The dynamic response of the structure is finally obtained by a wave propagation approach. For application to underway replenishment (UNREP), this analysis is extended to the case of a travelling load and to the case of moving boundaries, which accounts for the relative motion of the supplying and receiving ships. Moreover, a parametric study is conducted for future design purpose.
Show less - Date Issued
- 1989
- PURL
- http://purl.flvc.org/fcla/dt/14518
- Subject Headings
- Cargo handling--Equipment, Bridges, Truss, Loading and unloading
- Format
- Document (PDF)