Engineering Commons^™

The Effect Of Target Position And Tactual Recognition Field Size On Touch Bias And Accuracy, Elizabeth L. Brix

Master's Theses - Daytona Beach

Past studies have shown that touchscreen display angles other than those that perpendicularly bisect the operator's line of sight cause the operator to touch slightly below the target. The amount of touch bias created from this misjudgment fluctuates according to the target's position on the screen. Additionally, the percentage of touches that activate a specific target varies according to the size of the tactual recognition field. Out of three square tactual recognition field sizes, this study sought to match these fields with the amount of touch bias occurring in each location (i.e., small amount of touch bias requires only a …

A Cad-Mlca Interface For Next-Generation Dfe Tools, Jun He

Theses

Environmental concerns and rising product disposal costs have pressed manufactures to make more environmentally friendly products and customers to use and dispose of them in an environmental responsive way. Thus the practice of Design for Environment (DFE) is becoming essential in today's industrial environment. Life Cycle Assessment (LCA) provides different ways for the environmental assessment of products. One critical step in performing lifecycle assessment of any product design is to collect design-related data. The common way based on manual input for traditional DFE tools is not only cumbersome and time-consuming but also error-prone.

This thesis presents the characteristics of a …

Silicon Based Ir Filters, Prakash Mokashi

Theses

The design and fabrication of silicon based IR (Infrared) filters for high-speed optical communication systems are the topic of this thesis. Its novelty is in two aspects: 1) Use of silicon wafers as an optical guiding medium; 2) Use of wafer bonding technique to attach two optical elements together.

The structure consists of two optical waveguides, the bus waveguide and the drop channel waveguide. A ring on top of these waveguides couples them in such a way that only one narrow spectral line is removed from the bus waveguides which propagates in the dropchannel waveguide. The assembly is fabricated using …

A New Linear-Programming Based Admissible Heuristic For Cost-Based Abducaton, Muhamed Salah-Al-Din Hefny

Archived Theses and Dissertations

No abstract provided.

Routing Of Time-Sensitive Data In Mobile Ad Hoc Networks, Necdet Kilic

Theses and Dissertations

This research focuses on routing of time-sensitive data in mobile ad hoc networks. Routing protocols that were developed for ad hoc networks have been reviewed. Ad Hoc On-demand Distance Vectoring (AODV) routing protocol, which is a prominent routing protocol among these protocols have been implemented in OPNET, a discrete-event simulation tool. Taking AODV as a point of departure, a routing protocol named Real Time Routing Protocol (RTRP) has been developed and also implemented in simulation environment. The performance of these routing protocols have been observed by simulating them in various experiments where the workload has been chosen to be time-sensitive …

Wavelet Domain Communication System (Wdcs): Design, Model, Simulation, And Analysis, Randall W. Klein

Theses and Dissertations

A proposed wavelet domain communication system (WDCS) using transform domain processing is demonstrated as having enhanced interference avoidance capability under adverse environmental conditions. The WDCS system samples the environment and uses the wavelet transform, to determine interference presence and time/scale location. A digital communication waveform (basis function) is subsequently designed in the wavelet domain to specifically avoid regions containing interference. The WDCS basis function is data modulated prior to transmission. Assuming perfect synchronization, the receiver replicates a locally generated basis function for correlating with the received signal and demodulating the data. The proposed system is modeled and simulation results are …

Using Direct-Sequenced Spread Spectrum In A Wired Local Area Network, Robert J. Bonner

Theses and Dissertations

Code division multiple access provides an ability to share channel bandwidth amongst users at the same time. Individual user performance is not degraded with the addition of more users, unlike traditional Ethernet. Using direct sequenced spread spectrum in a wired local area network, network performance is improved. For a network in overload conditions, individual station throughput is increased by nearly 212% while mean end-to-end delay was reduced by 800%. The vast improvement demonstrated by this research has the capability to extend legacy-cabling infrastructures for many years to come while easily accommodating new bandwidth intensive multimedia applications.

Multicast Algorithms For Mobile Satellite Communication Networks, Ryan W. Thomas

Theses and Dissertations

With the rise of mobile computing and an increasing need for ubiquitous high speed data connections, Internet-in-the-sky solutions are becoming increasingly viable. To reduce the network overhead of one-to-many transmissions, the multicast protocol has been devised. The implementation of multicast in these Low Earth Orbit (LEO) constellations is a critical component to achieving an omnipresent network environment. This research examines the system performance associated with two terrestrial-based multicast mobility solutions, Distance Vector Multicast Routing Protocol (DVMRP) with mobile IP and On Demand Multicast Routing Protocol (ODMRP). These protocols are implemented and simulated in a six plane, 66 satellite LEO constellation. …

Emulation Of The Dataflow Computing Paradigm Using Field Programmable Gate Arrays (Fpgas), Segreen Ingersoll

Theses

Building a perfect dataflow computer has been an endeavor of many computer engineers. Ideally, it is a perfect parallel machine with zero overheads, but implementing one has been anything but perfect. While the sequential nature of control flow machines makes them relatively easy to implement, dataflow machines have to address a number of issues that are easily solved in the realm of control flow paradigm. Past implementations of dataflow computers have addressed these issues, such as conditional and reentrant program structures, along with the flow of data, at the processor level, i.e. each processor in the design would handle these …

The Determination Of Failure Occurring In The Stator Coil Winding Due To The Over-Voltage Using Matlab Software, Ali Reza Alavizadeh

Morehead State Theses and Dissertations

A thesis presented to the faculty of the College of Science & Technology at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science in Vocational Education / Technology by Ali Reza Alavizadeh on January 8, 2001.

Clustered Simulation Modeling For The Probabilistic Analysis Of Large Networks, Amr Ahmed Kandil

Archived Theses and Dissertations

No abstract provided.

Security In Mobile Agent Systems: An Approach To Protect Mobile Agents From Malicious Host Attacks, Dalia Fakhry

Archived Theses and Dissertations

Mobile agents are autonomous programs that roam the Internet from machine to machine under their own control on behalf of their users to perform specific pre-defined tasks. In addition to that, a mobile agent can suspend its execution at any point; transfer itself to another machine then resume execution at the new machine without any loss of state. Such a mobile model can perform many possible types of operations, and might carry critical data that has to be protected from possible attacks. The issue of agent security and specially agent protection from host attacks has been a hot topic and …

Associating Nodes With Routers In K-Ary M-Way Interconnection Networks, Aya Hassan Saad

Archived Theses and Dissertations

No abstract provided.

Virtual Design Office: A Collaborative Unified Modeling Language Tool, Hara Totapally

Theses Digitization Project

Real-time conferencing and collaborative computing is a great way to make developers more effective. This project is a collaborative framework development comprising configurable client and server components.

Attitudes And Perceptions Regarding Internet-Based Electronic Data Interchange In A Public Organization In Saudi Arabia, Abdulrahman S. Al-Zumaia

Dissertations and Theses @ UNI

This study examined the attitudes and perceptions of staff members and administrators in the General Directorate for Private Institutes & Centers (GDPI&C), Training institutes, and Centers in Saudi Arabia toward Internet-based Electronic Data Interchange (I-EDI) in a public organization. A survey was conducted of a group of GDPI&C members and randomly selected Institutes and Centers. The 339 respondents participated anonymously by providing demographic information and completing the attitudes and perceptions section of I-EDI questionnaire. The survey response rate was 82.6%.

An attitude survey was distributed to staff members, administrators, and faculty members in the Saudi Arabian GDPI&C, Training Institutes, and …

Applying E-Commerce Techniques To Public School Software, Michael Lapke

UNF Graduate Theses and Dissertations

Applying e-commerce technology to public school software is a process that involves an extensive and thorough analysis. There are typically three groups of users who would use such a system: teachers, administrators and parents. Teachers need a system that nearly duplicates the software that they are currently using to enter, store, and calculate their grades, while school administrators and parents need to student and teacher's information. This is where the use of e-commerce technology comes in very nicely.

The analysis performed for this project involved extensive interviews with the expert user set and a walk-through of the current system. The …

Design And Implementation Of Car Rental System, Fadi Fayez Abdel-Jaber

Theses Digitization Project

When someone wants to rent a car, the customer will usually think twice about the company from which they want to rent. The decision will be based on factors such as good rates, quality and customer service. The service the company representative offers the client should be fast, clear and accurate. This goal cannot be achieved without an informative system that will enable the customer representative to answer the various questions the client might have.

A Study And Implementation Of An Electronic Commerce Website Using Active Server Pages, Soumaya Boutkhil

Theses Digitization Project

The purpose of this project is to design an electronic commerce site for MarocMart company. MarocMart.com is an one-stop shopping company for a number of high quality products: carpets, jewelry, pottery, wood, leather, metals, and fashion items, etc... Each article is unique, hand-made by Moroccan craftsmen.

Presentations World Wide Systems, Sandra Marie Hengstebeck

Theses Digitization Project

The purpose of Presentations World Wide System (PWWS) is to allow students to view a live presentation through an Internet browser and allow the instructor to have control over the presentation.

Implementation Business-To-Business Electronic Commercial Website Using Coldfusion 4.5, Teerapong Euawatana

Theses Digitization Project

This project was created using ColdFusion 4.5 to build and implement a commercial web site to present a real picture of electronic commerce. This project is intended to provide enough information for other students who are looking for a guideline for further study and to improve their skills in business from an information management aspect.

World Wide Graphics, Alysha Marie Timmons

Theses Digitization Project

The scope of this project describes World Wide Graphics (WWG) a software package that provides instructors with the tools needed to present a web-based presentation to a group of students while having the ability of enhancing the prepared HTML slide with userdrawn graphics and highlighting.

Gene Expression Data Analysis Using Fuzzy Logic, Robert Reynolds

Electronic Theses and Dissertations

DNA microarray technology allows for the parallel analysis of the expression of genes in an organism. The wealth of spatio-temporal data provided by the technology allows us to attempt to reverse engineer the genetic network. Fuzzy logic has been proposed as a method of analyzing the relationships between genes as well as their corresponding proteins. Combinations of genes are entered into a fuzzy model of gene interaction and evaluated on the basis of how well the combination fits the model. Those combinations of genes that fit the model are likely to be related. However, current analysis algorithms are slow and …

A Dynamic Programming-Based Approach To Microarray Image Comparison And Registration, Sunil Bosco Rodrigues

Masters Theses

"Microarray technology is increasingly used as a means of high throughput analysis of human, non-human and plant genomes. Manual methods of array production have inherent imperfections and variations of the quality of output data derived from these arrays. A dynamic programming-based approach is presented to validate the quality of such data prior to insertion into evolving databases in order to assign reliably, genetic aberrations to bio-medical functions. Dynamic programming is used for comparing normal and tumor microarray image pairs and a cost function is developed which gives a value representing the difference between the images. Quality of the image pairs …

Design And Implementation Of An Intranet-Solution Especially With Workflow Aspects, Robert Loew

Theses

An Intranet support a new or simply an easier information system for all the workers within a company using internet technology. On the one hand, employees can use Web technology and very simple tools to provide and navigate information. On the other hand, the costly and time-consuming business of installing and maintaining software on local PCs can be avoided by using Browser-based Intranet applications. Ideally, it would be possible to access all forms of information processing using one and the same Web browser. This is the aim of the Intranet Project upon which this thesis is based.

Various technologies for …

Statistical Multiplexing And Connection Admission Control In Atm Networks, Guoqiang Mao

Theses: Doctorates and Masters

Asynchronous Transfer Mode (ATM) technology is widely employed for the transport of network traffic, and has the potential to be the base technology for the next generation of global communications. Connection Admission Control (CAC) is the effective traffic control mechanism which is necessary in ATM networks in order to avoid possible congestion at each network node and to achieve the Quality-of-Service (QoS) requested by each connection. CAC determines whether or not the network should accept a new connection. A new connection will only be accepted if the network has sufficient resources to meet its QoS requirements without affecting the QoS …

Towards Comparative Profiling Of Parallel Applications With Pperfdb, Christian Leland Hansen

Dissertations and Theses

Due to the complex nature of parallel programming, it is difficult to diagnose and solve performance related problems. Knowledge of program behavior is obtained experimentally, with repeated runs of a slightly modified version of the application or the same code in different environments. In these circumstances, comparative performance analysis can provide meaningful insights into the subtle effects of system and code changes on parallel program behavior by highlighting the difference in performance results across executions.

I have designed and implemented modules which extend the PPerfDB performance tool to allow access to existing performance data generated by several commonly used tracing …

Bluetooth Software On Linux, Wireless Hand-Held Devices, Teck Khoon Low

Theses : Honours

In order to enable existing computers (non-Bluetooth ready) to connect to a Bluetooth piconet, a Bluetooth hardware device comprising of the Radio antenna, the baseband and control circuit is used. The digital portion of this device is also known as a Host Controller, HC. In the traditional communication lingo, the Bluetooth Hardware functions, as the Data Communication Equipment (DCE) while the Host is the Data terminal Equipment (DTE). This report discusses the theory and implementation of the communication protocol between the Host and the Host Controller, enabling communication between the computer and the Bluetooth hardware

System Security In An Open Lab Environment, Erik Quist

Masters Theses

This thesis presents a system security process for computer workstations in a university open lab environment, which was developed and implemented for the Lumpkin Hall Computer Labs at Eastern Illinois University (EIU). The system security includes the use of policies and NTFS permissions, registry hacks and script files. These techniques were applied to a mixture of Windows NT 4.0 service pack 6a and Windows 2000 Professional workstations in the Lumpkin Hall Computer Labs. They were then tested for appropriate security setup using a Network Security Checksheet and a survey. The Network Security Checksheet ensured that all of the workstations were …

Vlsi Implementation Of A Massively Parallel Wavelet Based Zerotree Coder For The Intelligent Pixel Array, Geoffrey N. Alagoda

Theses: Doctorates and Masters

In the span of a few years, mobile multimedia communication has rapidly become a significant area of research and development constantly challenging boundaries on a variety of technologic fronts. Mobile video communications in particular encompasses a number of technical hurdles that generally steer technological advancements towards devices that are low in complexity, low in power usage yet perform the given task efficiently. Devices of this nature have been made available through the use of massively parallel processing arrays such as the Intelligent Pixel Processing Array. The Intelligent Pixel Processing array is a novel concept that integrates a parallel image capture …