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- Title
- An efficient test strategy for microprogrammable minicomputers.
- Creator
- Franklin, William Allen., Florida Atlantic University, Fernandez, Eduardo B.
- Abstract/Description
-
A strategy for software and firmware testing for minicomputers is presented in this thesis. This test approach provides effective hardware fault detection and isolation. The test approach is embodied in a set of test procedures and is meant for use by field and factory personnel. This thesis discusses several alternative diagnostic approaches, and combines some of the features of these approaches to produce an efficient and complete test approach.
- Date Issued
- 1988
- PURL
- http://purl.flvc.org/fcla/dt/14465
- Subject Headings
- Minicomputers--Testing
- Format
- Document (PDF)
- Title
- The effects of sensor mislocation in vertical arrays.
- Creator
- Joy, David Raymond., Florida Atlantic University, Glegg, Stewart A. L.
- Abstract/Description
-
Knowledge of the effects of sensor mislocation is necessary for interpreting the outputs from vertical acoustic receiver arrays deployed in the ocean. The first phase of this study consists of deriving a numerical method to determine the geometric shape of a flexible array cable, anchored at its upper end and displaced by horizontal ocean currents. Analytic methods to verify the numerical method are then derived. The second phase of this study considers measurements of a simple sound source...
Show moreKnowledge of the effects of sensor mislocation is necessary for interpreting the outputs from vertical acoustic receiver arrays deployed in the ocean. The first phase of this study consists of deriving a numerical method to determine the geometric shape of a flexible array cable, anchored at its upper end and displaced by horizontal ocean currents. Analytic methods to verify the numerical method are then derived. The second phase of this study considers measurements of a simple sound source by perturbed array cables. The results are compared with those from straight cables to ascertain the effect of the sensor mislocation. These effects are evaluated in terms of array cable curvature and tilt.
Show less - Date Issued
- 1990
- PURL
- http://purl.flvc.org/fcla/dt/14595
- Subject Headings
- Underwater acoustics
- Format
- Document (PDF)
- Title
- A class-based search system in unstructured peer-to-peer networks.
- Creator
- Huang, Juncheng., Florida Atlantic University, Wu, Jie
- Abstract/Description
-
Efficient searching is one of the important design issues in peer-to-peer (P2P) networks. Among various searching techniques, semantic-based searching has drawn significant attention recently. Gnutella-like efficient searching system (GES) [29] is such a system. GES derives node vector , a semantic summary of all documents on a node based on vector space model (VSM). The node-based topology adaptation algorithm and search protocol are then discussed. However, when there are many categories of...
Show moreEfficient searching is one of the important design issues in peer-to-peer (P2P) networks. Among various searching techniques, semantic-based searching has drawn significant attention recently. Gnutella-like efficient searching system (GES) [29] is such a system. GES derives node vector , a semantic summary of all documents on a node based on vector space model (VSM). The node-based topology adaptation algorithm and search protocol are then discussed. However, when there are many categories of documents at each node, the node vector representation may be inaccurate. We extend the idea of GES and present a class-based search system (CSS). It makes use of a document clustering algorithm: OSKM [27] to cluster all documents on a node into several classes. Each class can be viewed as a virtual node. As a result, class vector replaces node vector and plays an important role in class-based topology adaptation and search process, which makes CSS very efficient. Our simulation demonstrates that CSS outperforms GES.
Show less - Date Issued
- 2006
- PURL
- http://purl.flvc.org/fcla/dt/13367
- Subject Headings
- Peer-to-peer architecture (Computer networks), Management information systems, Computer security, Cascading style sheets, Web sites--Design
- Format
- Document (PDF)
- Title
- An empirical study of resource-based selection of rule-based software quality classification models.
- Creator
- Herzberg, Angela., Florida Atlantic University, Khoshgoftaar, Taghi M.
- Abstract/Description
-
Software managers are under pressure to deliver reliable and high quality software, within a limited time and budget. To achieve this goal, they can be aided by different modeling techniques that allow them to predict the quality of software, so that the improvement efforts can be directed to software modules that are more likely to be fault-prone. Also, different projects have different resource availability constraints, and being able to select a model that is suitable for a specific...
Show moreSoftware managers are under pressure to deliver reliable and high quality software, within a limited time and budget. To achieve this goal, they can be aided by different modeling techniques that allow them to predict the quality of software, so that the improvement efforts can be directed to software modules that are more likely to be fault-prone. Also, different projects have different resource availability constraints, and being able to select a model that is suitable for a specific resource constraint allows software managers to direct enhancement techniques more effectively and efficiently. In our study, we use Rule-Based Modeling ( RBM) to predict the likelihood of a module being fault-prone and the Modified Expected Cost of Misclassification (MECM ) measure to select the models that are suitable, in the context of the given resource constraints. This empirical study validates MECM as a measure to select an appropriate RBM model.
Show less - Date Issued
- 2002
- PURL
- http://purl.flvc.org/fcla/dt/12968
- Subject Headings
- Software measurement, Computer software--Quality control
- Format
- Document (PDF)
- Title
- An empirical study of module order models.
- Creator
- Adipat, Boonlit., Florida Atlantic University, Khoshgoftaar, Taghi M.
- Abstract/Description
-
Most software reliability approaches classify modules as fault-prone or not fault-prone by way of a predetermined threshold. However, it may not be practical to predefine a threshold because the amount of resources for reliability enhancement may be unknown. Therefore, a module-order model (MOM) predicting the rank order of modules can be used to solve this problem. The objective of this research is to make an empirical study of MOMs based on five different underlying quantitative software...
Show moreMost software reliability approaches classify modules as fault-prone or not fault-prone by way of a predetermined threshold. However, it may not be practical to predefine a threshold because the amount of resources for reliability enhancement may be unknown. Therefore, a module-order model (MOM) predicting the rank order of modules can be used to solve this problem. The objective of this research is to make an empirical study of MOMs based on five different underlying quantitative software quality models. We examine the benefits of principal components analysis with MOM and demonstrate that better accuracy of underlying techniques does not always yield better performance with MOM. Three case studies of large industrial software systems were conducted. The results confirm that MOM can create efficient models using different underlying techniques that provide various accuracy when predicting a quantitative software quality factor over the data sets.
Show less - Date Issued
- 2001
- PURL
- http://purl.flvc.org/fcla/dt/12783
- Subject Headings
- Computer software--Quality control, Software measurement
- Format
- Document (PDF)
- Title
- A convenient state machine formalism for high-level control of autonomous underwater vehicles.
- Creator
- Girard, Anouck Renee., Florida Atlantic University, Smith, Samuel M.
- Abstract/Description
-
Recent successes in Autonomous Underwater Vehicle (AUV) technology have generated demand for broader, more general use of these vehicles, along with demand for longer, more complicated missions. However, AUVs are becoming more complex, and hence more difficult to program, test and maintain. A discrete event system would provide conditional execution for mission management, failure detection, and resource allocation techniques. The goal of this thesis is to provide a convenient formalism for...
Show moreRecent successes in Autonomous Underwater Vehicle (AUV) technology have generated demand for broader, more general use of these vehicles, along with demand for longer, more complicated missions. However, AUVs are becoming more complex, and hence more difficult to program, test and maintain. A discrete event system would provide conditional execution for mission management, failure detection, and resource allocation techniques. The goal of this thesis is to provide a convenient formalism for discrete event systems that reduces the apparent complexity of the system while maintaining its robust capabilities. The chosen formalism allows the convenient representation of hierarchies of concurrent hierarchical state machines. The formal semantics of the model are discussed, along with complete data structures and algorithms. As an example, a complete design of the navigator state machine is provided.
Show less - Date Issued
- 1998
- PURL
- http://purl.flvc.org/fcla/dt/15549
- Subject Headings
- Submersibles, Oceanographic submersibles
- Format
- Document (PDF)
- Title
- A connected dominating-set-based routing in ad hoc wireless networks.
- Creator
- Gao, Ming., Florida Atlantic University, Wu, Jie
- Abstract/Description
-
In ad hoc wireless networks, routing protocols are challenged with establishing and maintaining multihop routes in the face of mobility, bandwidth limitation and power constraints. Routing based on a connected dominating set is a promising approach, where the searching space for a router reduced to nodes in the set. A set is dominating if all the nodes in the system are either in the dominating set or adjacent to some nodes in the dominating set. In this thesis, we propose a method of...
Show moreIn ad hoc wireless networks, routing protocols are challenged with establishing and maintaining multihop routes in the face of mobility, bandwidth limitation and power constraints. Routing based on a connected dominating set is a promising approach, where the searching space for a router reduced to nodes in the set. A set is dominating if all the nodes in the system are either in the dominating set or adjacent to some nodes in the dominating set. In this thesis, we propose a method of calculating power-aware connected dominating set. Our simulation results show that the proposed approach outperforms several existing approaches in terms of life span of the network. We also discuss mobility management in dominating-set-based networks. Three operations are considered which are mobile host switch on, mobile host switch off and mobile host movement. We also discuss the use of dynamic source routing as an application of the connected dominating set.
Show less - Date Issued
- 2001
- PURL
- http://purl.flvc.org/fcla/dt/12780
- Subject Headings
- Mobile computing, Computer networks, Computer algorithms
- Format
- Document (PDF)
- Title
- A critical investigation of SQLJ.
- Creator
- Borkar, Anjali P., Florida Atlantic University, Solomon, Martin K.
- Abstract/Description
-
We critically investigate, evaluate, and illustrate the language of SQL and Java provided by SQLJ. We investigate the main constructs of SQLJ, such as use of declarative and executable statements, SQLJ clauses, and use of bind variables in SQLJ applications. We also observe usage of named and position iterators and we illustrate how to develop and run applications on the server side. In particular, we analyze the difference between SQLJ and JDBC and we find that SQLJ is good for static SQL...
Show moreWe critically investigate, evaluate, and illustrate the language of SQL and Java provided by SQLJ. We investigate the main constructs of SQLJ, such as use of declarative and executable statements, SQLJ clauses, and use of bind variables in SQLJ applications. We also observe usage of named and position iterators and we illustrate how to develop and run applications on the server side. In particular, we analyze the difference between SQLJ and JDBC and we find that SQLJ is good for static SQL whereas JDBC is good for dynamic SQL. We also compare the relationship of SQLJ to ANSI/ISO embedded SQL. Finally we evaluate the advantages of developing SQLJ stored procedure over PL/SQL procedures.
Show less - Date Issued
- 1999
- PURL
- http://purl.flvc.org/fcla/dt/15722
- Subject Headings
- Database management, SQL (Computer program language), Java (Computer program language)
- Format
- Document (PDF)
- Title
- A comparison of shallow water sound propagation measurements and computer model predictions.
- Creator
- Cichock, Joseph Arnold., Florida Atlantic University, Glegg, Stewart A. L.
- Abstract/Description
-
High-resolution sound propagation measurements were made on a 1/10000 th-scale model of the Santa Lucia Escarpment, located off the Southern California coast. The tank was modified from previous experiments using a rubber coating on the tank bottom. High frequency, high resolution, Transmission Loss measurements were made on the SFTF range, Dania Florida. The Parabolic Equation Model RAM was used to validate these measurement sets. A new approach to account for shear wave effects on the...
Show moreHigh-resolution sound propagation measurements were made on a 1/10000 th-scale model of the Santa Lucia Escarpment, located off the Southern California coast. The tank was modified from previous experiments using a rubber coating on the tank bottom. High frequency, high resolution, Transmission Loss measurements were made on the SFTF range, Dania Florida. The Parabolic Equation Model RAM was used to validate these measurement sets. A new approach to account for shear wave effects on the Transmission Loss for the RAM model was developed. Using this new approach, the scaled low frequency Santa Lucia measurements showed excellent agreement with the RAM calculated TL, but there were discrepancies in the predictions of the high frequency at sea measurements at ranges greater than 1 km.
Show less - Date Issued
- 2000
- PURL
- http://purl.flvc.org/fcla/dt/12706
- Subject Headings
- Underwater acoustics, Sound--Transmission
- Format
- Document (PDF)
- Title
- The effect of compressive creep on the structural integrity and drainage capacity of landfill lining systems.
- Creator
- Daniel, Ellen C. Hendrix., Florida Atlantic University, Reddy, Dronnadula V.
- Abstract/Description
-
Landfilling, by all indications, will continue to be the predominant method of solid waste disposal. Traditional civil engineering drainage medium (i.e. sand or gravel) are being replaced by geosynthetics which are much thinner in an effort to create more usable volume for waste. This study examines the effect of compressive creep of geonets as used in leachate collection and detection systems, and how it affects in-plane drainage. HDPE geonet was subjected to a compressive load of 110 psi....
Show moreLandfilling, by all indications, will continue to be the predominant method of solid waste disposal. Traditional civil engineering drainage medium (i.e. sand or gravel) are being replaced by geosynthetics which are much thinner in an effort to create more usable volume for waste. This study examines the effect of compressive creep of geonets as used in leachate collection and detection systems, and how it affects in-plane drainage. HDPE geonet was subjected to a compressive load of 110 psi. The in plane flow rate of municipal solid waste leachate was measured, as well as the change in thickness, for 120 days. In addition, geonet samples were placed between two pieces of HDPE geomembrane. These samples were subjected to a normal load of 140 psi for 120 days. The samples were then inspected for sign of geonet imprint into the geonet, or for strand layover.
Show less - Date Issued
- 1995
- PURL
- http://purl.flvc.org/fcla/dt/15229
- Subject Headings
- Waste disposal in the ground, Sanitary landfills--Linings, Leachate, Geosynthetics
- Format
- Document (PDF)
- Title
- An evaluation of the POSTGRES DBMS.
- Creator
- John, Agustus Worrial., Florida Atlantic University, Solomon, Martin K.
- Abstract/Description
-
In 1970, E. F. Codd published the paper "A relational model of data for large shared data banks" that introduced the relational data model for managing data. SQL, currently the most widely used relational language, was introduced in the experimental IBM database management system (DBMS) System R. Another DBMS, called INGRES, was developed at about the same time as System R (under the leadership of M. Stonebraker), and it was based on the relational database language QUEL. Since that time,...
Show moreIn 1970, E. F. Codd published the paper "A relational model of data for large shared data banks" that introduced the relational data model for managing data. SQL, currently the most widely used relational language, was introduced in the experimental IBM database management system (DBMS) System R. Another DBMS, called INGRES, was developed at about the same time as System R (under the leadership of M. Stonebraker), and it was based on the relational database language QUEL. Since that time, inadequacies of the relational model and the need to handle more complex database issues warranted the extension of the relational model and the implementation of a DBMS that meets those needs. M. Stonebraker developed the post-relational DBMS POSTGRES based on the POSTQUEL database language. An evaluation of POSTGRES will be conducted to determine the adequacy of POSTGRES with respect to traditional relational database issues, as well as more complex issues that are considered post-relational.
Show less - Date Issued
- 1993
- PURL
- http://purl.flvc.org/fcla/dt/14992
- Subject Headings
- Database management--Computer programs--Evaluation
- Format
- Document (PDF)
- Title
- An experimental investigation of the performance of a series of propellers for a human powered underwater vehicle.
- Creator
- Heeb, Karl Von., Florida Atlantic University, Dhanak, Manhar R.
- Abstract/Description
-
Designing a propeller for optimum performance on a human powered underwater vehicle presents a significant engineering challenge. The propeller must be highly efficient to utilize the inherently low power output of a human. Also, the propeller must be correctly matched to the maximum sustainable torque of the propulsor. This thesis experimentally investigates a minimum induced loss propeller design program and its application to a human powered underwater vehicle. The design program is based...
Show moreDesigning a propeller for optimum performance on a human powered underwater vehicle presents a significant engineering challenge. The propeller must be highly efficient to utilize the inherently low power output of a human. Also, the propeller must be correctly matched to the maximum sustainable torque of the propulsor. This thesis experimentally investigates a minimum induced loss propeller design program and its application to a human powered underwater vehicle. The design program is based on the vortex theory of propellers. The work includes experimental measurements of the velocity and rotational rate of three propellers designed with the minimum induced loss propeller design program. This positively verifies the output of the design algorithm. Also, the research, through the use of an underwater ergometer, determines the maximum power and torque sustainable by a human pedaling underwater. Final results of the research show that the design algorithm overestimates the blade section angles by 25% because the design program neglects the influence of the wake of the vehicle.
Show less - Date Issued
- 1994
- PURL
- http://purl.flvc.org/fcla/dt/15078
- Subject Headings
- Propellers, Submersibles, Underwater propulsion
- Format
- Document (PDF)
- Title
- An experimental study of the response of circular plates subjected to fluid loading.
- Creator
- Coulson, Robert Kenneth., Florida Atlantic University, Glegg, Stewart A. L.
- Abstract/Description
-
The interaction between vibrating structures and fluids can have a profound influence upon the natural frequencies of the structure's vibration. This study examines one specific structure; a thin circular plate with the rarely studied free edge condition. It starts by considering a completely free plate in a vacuum and then, using receptance matching, utilises this result to determine the effects, on the natural frequencies, of a centrally located driving rod. Then, using the same technique,...
Show moreThe interaction between vibrating structures and fluids can have a profound influence upon the natural frequencies of the structure's vibration. This study examines one specific structure; a thin circular plate with the rarely studied free edge condition. It starts by considering a completely free plate in a vacuum and then, using receptance matching, utilises this result to determine the effects, on the natural frequencies, of a centrally located driving rod. Then, using the same technique, a result for the drive admittance of the fluid loaded plate is adapted to predict the natural frequencies of the same structure when subjected to significant fluid loading. All these results are then compared to those obtained from experiments.
Show less - Date Issued
- 1990
- PURL
- http://purl.flvc.org/fcla/dt/14605
- Subject Headings
- Plates (Engineering)--Vibration, Acoustical engineering
- Format
- Document (PDF)
- Title
- A framework for an icon-based software engineering environment.
- Creator
- Huang, Qinxi., Florida Atlantic University, Larrondo-Petrie, Maria M.
- Abstract/Description
-
Current computer technologies and demands bring new challenges to the software engineering tools. This thesis includes a survey of software engineering environments, standards and technologies. It also examines the features needed to support rigorous object-oriented software development. The main contributions of the thesis are descriptions of innovative concepts and a high-level framework for a next-generation object-oriented software system development, management and maintenance...
Show moreCurrent computer technologies and demands bring new challenges to the software engineering tools. This thesis includes a survey of software engineering environments, standards and technologies. It also examines the features needed to support rigorous object-oriented software development. The main contributions of the thesis are descriptions of innovative concepts and a high-level framework for a next-generation object-oriented software system development, management and maintenance environment, called IconSEE++, an Icon-based Software Engineering Environment.
Show less - Date Issued
- 1998
- PURL
- http://purl.flvc.org/fcla/dt/15576
- Subject Headings
- Software engineering, Object-oriented methods (Computer science), Icon (Computer program language)
- Format
- Document (PDF)
- Title
- A fuzzy logic based flight control system for the FAU "Ocean Voyager" autonomous underwater vehicle.
- Creator
- Anderson, Donald Taylor., Florida Atlantic University, Smith, Samuel M.
- Abstract/Description
-
The development of a Flight Control System for a non-linear six degree of freedom model of an Autonomous Underwater Vehicle is described. Heading, pitch and depth are regulated by three independent Fuzzy Logic Controllers (FLCs). Numerical methods are used to tune rule bases to control tables that are based on the minimum time characteristics of the model. Setpoint errors are eliminated using fuzzily constrained integrators. A scheme to vary control policy with forward speed is also detailed....
Show moreThe development of a Flight Control System for a non-linear six degree of freedom model of an Autonomous Underwater Vehicle is described. Heading, pitch and depth are regulated by three independent Fuzzy Logic Controllers (FLCs). Numerical methods are used to tune rule bases to control tables that are based on the minimum time characteristics of the model. Setpoint errors are eliminated using fuzzily constrained integrators. A scheme to vary control policy with forward speed is also detailed. System stability is evaluated using cell-to-cell mapping. A variable structure fuzzy heading controller is designed for an unstable non-linear model of an Unmanned Underwater Vehicle. Scheduling of scaling parameters accommodates changes in forward speed as predicted by thruster RPM and angular distance turned. This FLC combines bang-bang and linear type control to respond more rapidly and robustly than a gain scheduled linear PID controller.
Show less - Date Issued
- 1993
- PURL
- http://purl.flvc.org/fcla/dt/14899
- Subject Headings
- Fuzzy sets, Submersibles--Control systems, Oceanographic submersibles--Automatic control
- Format
- Document (PDF)
- Title
- A multiprocessor simulator to test fault detection and reconfiguration algorithms.
- Creator
- Bhathija, Unmesh Jethanand., Florida Atlantic University, Fernandez, Eduardo B.
- Abstract/Description
-
In recent years multiprocessor systems are becoming increasingly important in critical applications. In particular, their fault tolerance properties are of great importance for their ability to be used in these type of applications. We have developed a multiprocessor simulator that can be used to test different fault detection algorithms. The processors must have four communication links. This simulator operates by passing messages between processors. An algorithm was developed for routing...
Show moreIn recent years multiprocessor systems are becoming increasingly important in critical applications. In particular, their fault tolerance properties are of great importance for their ability to be used in these type of applications. We have developed a multiprocessor simulator that can be used to test different fault detection algorithms. The processors must have four communication links. This simulator operates by passing messages between processors. An algorithm was developed for routing the messages among the processors. The simulator can also be used to try different reconfiguration strategies. In particular we have tested Malek's comparison algorithm using different multiprocessor configurations. We also developed a program which determines the configuration of an unknown network of transputers.
Show less - Date Issued
- 1990
- PURL
- http://purl.flvc.org/fcla/dt/14622
- Subject Headings
- Multiprocessors, Fault-tolerant computing
- Format
- Document (PDF)
- Title
- A numerical technique for multiple shock capturing in steady, quasi one-dimensional flows.
- Creator
- Brigandi, Joseph., Florida Atlantic University, Chow, Wen L.
- Abstract/Description
-
A numerical technique is given to capture multiple shocks in steady, quasi one-dimensional flows by solving the Euler equations from a sequence of implicit/explicit solutions for the Riemann variables. A supersonic wind tunnel with a variable area diffuser is analyzed with the results compared to exact solutions. Examples are given with both one and two standing shocks. The technique given is an extension of Moretti's scheme for a single discontinuity in a De Laval nozzle. It is shown that...
Show moreA numerical technique is given to capture multiple shocks in steady, quasi one-dimensional flows by solving the Euler equations from a sequence of implicit/explicit solutions for the Riemann variables. A supersonic wind tunnel with a variable area diffuser is analyzed with the results compared to exact solutions. Examples are given with both one and two standing shocks. The technique given is an extension of Moretti's scheme for a single discontinuity in a De Laval nozzle. It is shown that this efficient technique is easily adaptable and is equally accurate for multiple discontinuities as it is for a single discontinuity.
Show less - Date Issued
- 1990
- PURL
- http://purl.flvc.org/fcla/dt/14673
- Subject Headings
- Fluid dynamics, Compressibility--Computer programs, Shock waves--Computer programs
- Format
- Document (PDF)
- Title
- Fuzzy auto-detection of bottom mines.
- Creator
- Bauer, Eric John., Florida Atlantic University, Schock, Steven G.
- Abstract/Description
-
An automatic mine detection method has been designed for the purpose of locating mine-like objects on the seabed in real time using a high frequency, high resolution side scan sonar. The processing flow includes a calculation of the average scattering function of the local environment, shadow detection, and a fuzzy logic clustering/fuzzy logic detection procedure for identifying mine-like shadows. An Autonomous Underwater Vehicle (AUV) equipped with a fuzzy detection system gives the Navy the...
Show moreAn automatic mine detection method has been designed for the purpose of locating mine-like objects on the seabed in real time using a high frequency, high resolution side scan sonar. The processing flow includes a calculation of the average scattering function of the local environment, shadow detection, and a fuzzy logic clustering/fuzzy logic detection procedure for identifying mine-like shadows. An Autonomous Underwater Vehicle (AUV) equipped with a fuzzy detection system gives the Navy the capability of rapidly locating bottom mines in littoral underwater environments during over-the-horizon operations.
Show less - Date Issued
- 2000
- PURL
- http://purl.flvc.org/fcla/dt/12705
- Subject Headings
- Submarine mines, Sonar, Fuzzy systems
- Format
- Document (PDF)
- Title
- GSM network simulation and performance analysis.
- Creator
- Bothra, Piyush., Florida Atlantic University, Ilyas, Mohammad
- Abstract/Description
-
This research focuses on analyzing the effect of change in network parameters on the performance of GSM cellular network. A simulation model is created using visual C++ and network performance in terms of call failures and handover failures are studied. A cellular network architecture and its performance are based on so many parameters and complexities that it is very difficult to analyze the effect of a parameter on any one aspect of performance. The purpose of this thesis is to study the...
Show moreThis research focuses on analyzing the effect of change in network parameters on the performance of GSM cellular network. A simulation model is created using visual C++ and network performance in terms of call failures and handover failures are studied. A cellular network architecture and its performance are based on so many parameters and complexities that it is very difficult to analyze the effect of a parameter on any one aspect of performance. The purpose of this thesis is to study the performance of network with respect to some of those parameters while neglecting other effects. The simulated network takes parameters like cell diameter, traffic intensity and mobility pattern as input and a simulation run results in the evaluation of the call failure and success statistics.
Show less - Date Issued
- 2002
- PURL
- http://purl.flvc.org/fcla/dt/12952
- Subject Headings
- Database management, SQL (Computer program language), Java (Computer program language)
- Format
- Document (PDF)
- Title
- Feature extraction implementation for handwritten numeral recognition.
- Creator
- Banuru, Prashanth K., Florida Atlantic University, Shankar, Ravi
- Abstract/Description
-
Feature extraction for handwritten character recognition has always been a challenging problem for investigators in the field. The problem gets worse due to large variations present for each type of input character. Our algorithm computes directional features for alphanumeric input mapped on to a hexagonal lattice. The algorithm implements size and scale invariance that is a requirement for achieving a reasonably good recognition rate. Functional performance has been verified for an hexagonal...
Show moreFeature extraction for handwritten character recognition has always been a challenging problem for investigators in the field. The problem gets worse due to large variations present for each type of input character. Our algorithm computes directional features for alphanumeric input mapped on to a hexagonal lattice. The algorithm implements size and scale invariance that is a requirement for achieving a reasonably good recognition rate. Functional performance has been verified for an hexagonal lattice mapped input on the data obtained from the US postal service handwritten character database. In this thesis, we implemented the algorithm in a Xilinx FPGA (XC4xxx series).
Show less - Date Issued
- 1994
- PURL
- http://purl.flvc.org/fcla/dt/15103
- Subject Headings
- Algorithms, Pattern recognition systems--Computer simulation, Optical character recognition devices--Computer simulation
- Format
- Document (PDF)