Open Access. Powered by Scholars. Published by Universities.®
- Institution
- Keyword
-
- Ad hoc Clustering Algortihm (1)
- Algorithms (1)
- Arrhythmia (1)
- Asynchronous (1)
- Bayesian Belief Networks (1)
-
- Clockless (1)
- Color segmentation (1)
- Computer sound processing (1)
- Computer-assisted instruction (1)
- Control Systems (1)
- Controller Implementation (1)
- Coupled oscillators (1)
- Coupling (1)
- Data mining (1)
- Dependency Metrics (1)
- Digital Control (1)
- EAM (1)
- ECG (1)
- EKG (1)
- Educational games (1)
- Electrocardiogram (1)
- FAM (1)
- Frequency synthesizers (1)
- Fuzzy ART (1)
- GA (1)
- GAM (1)
- Genetic ART (1)
- Genetic Algorithms (1)
- Indium phosphide (1)
- Indoor (1)
Articles 1 - 16 of 16
Full-Text Articles in Entire DC Network
Multivariate Discretization Of Continuous Valued Attributes., Ehab Ahmed El Sayed Ahmed 1978-
Multivariate Discretization Of Continuous Valued Attributes., Ehab Ahmed El Sayed Ahmed 1978-
Electronic Theses and Dissertations
The area of Knowledge discovery and data mining is growing rapidly. Feature Discretization is a crucial issue in Knowledge Discovery in Databases (KDD), or Data Mining because most data sets used in real world applications have features with continuously values. Discretization is performed as a preprocessing step of the data mining to make data mining techniques useful for these data sets. This thesis addresses discretization issue by proposing a multivariate discretization (MVD) algorithm. It begins withal number of common discretization algorithms like Equal width discretization, Equal frequency discretization, Naïve; Entropy based discretization, Chi square discretization, and orthogonal hyper planes. After …
Advancements In Frameworks For Educational Games Through Sound Software Engineering Principles., Christy M. Bogard
Advancements In Frameworks For Educational Games Through Sound Software Engineering Principles., Christy M. Bogard
Electronic Theses and Dissertations
Educational games have steadily entered classrooms as a means of challenging advanced students and tutoring those lacking comprehension. However, without adequate educational benefits, instructors are struggling to continually justify the marginal value added of using these programs. It is the intent of this thesis to demonstrate that sound software engineering principles can improve the framework of educational games. First, the core framework requirements of computer-based educational games are outlined. Current educational games are then evaluated based on their ability to meet these requirements. From this analysis, necessary architectural changes are recommended to best facilitate future game advancements. Finally, to demonstrate …
High-Speed Digital And Mixed-Signal Components For X– And Ku–Band Direct Digital Synthesizers In Indium Phosphide Dhbt Technology, Steven Eugene Turner
High-Speed Digital And Mixed-Signal Components For X– And Ku–Band Direct Digital Synthesizers In Indium Phosphide Dhbt Technology, Steven Eugene Turner
Electronic Theses and Dissertations
Recently reported double heterojunction bipolar transistor (DHBT) devices manufactured in Indium Phosphide (InP) technology with ft and fmax both over 300 GHz enable advanced high-speed digital and mixed-signal circuits. In this thesis, the use of InP DHBT devices for high-speed accumulator circuits and X– and Ku–band direct digital synthesizer (DDS) circuits are investigated. At these frequencies, new technological challenges in the design of digital and mixed-signal circuits arise in areas including power consumption and clock distribution. This thesis addresses the speed/power tradeoffs in high-speed accumulator designs, the design of DDS circuits, and clock distribution simulation. The results of six accumulator …
Analysis Of Complexity And Coupling Metrics Of Subsystems In Large Scale Software Systems, Harish Ramakrishnan
Analysis Of Complexity And Coupling Metrics Of Subsystems In Large Scale Software Systems, Harish Ramakrishnan
Electronic Theses and Dissertations
Dealing with the complexity of large-scale systems can be a challenge for even the most experienced software architects and developers. Large-scale software systems can contain millions of elements, which interact to achieve the system functionality. Managing and representing the complexity involved in the interaction of these elements is a difficult task. We propose an approach for analyzing the reusability, maintainability and complexity of such a complex large-scale software system. Reducing the dependencies between the subsystems increase the reusability and decrease the efforts needed to maintain the system thus reducing the complexity of the system. Coupling is an attribute that summarizes …
Genetically Engineered Adaptive Resonance Theory (Art) Neural Network Architectures, Ahmad Al-Daraiseh
Genetically Engineered Adaptive Resonance Theory (Art) Neural Network Architectures, Ahmad Al-Daraiseh
Electronic Theses and Dissertations
Fuzzy ARTMAP (FAM) is currently considered to be one of the premier neural network architectures in solving classification problems. One of the limitations of Fuzzy ARTMAP that has been extensively reported in the literature is the category proliferation problem. That is Fuzzy ARTMAP has the tendency of increasing its network size, as it is confronted with more and more data, especially if the data is of noisy and/or overlapping nature. To remedy this problem a number of researchers have designed modifications to the training phase of Fuzzy ARTMAP that had the beneficial effect of reducing this phenomenon. In this thesis …
Intrusion Detection In Wireless Sensor Networks, Hong Nhung Nguyen
Intrusion Detection In Wireless Sensor Networks, Hong Nhung Nguyen
Electronic Theses and Dissertations
There are several applications that use sensor motes and researchers continue to explore additional applications. For this particular application of detecting the movement of humans through the sensor field, a set of Berkley mica2 motes on TinyOS operating system is used. Different sensors such as pressure, light, and so on can be used to identify the presence of an intruder in the field. In our case, the light sensor is chosen for the detection. When an intruder crosses the monitored environment, the system detects the changes of the light values, and any significant change meaning that a change greater than …
A Performance Comparison Of Clustering Algorithms In Ad Hocnetworks, Chun Yeung
A Performance Comparison Of Clustering Algorithms In Ad Hocnetworks, Chun Yeung
Electronic Theses and Dissertations
An ad hoc network is comprised of wireless mobile nodes without the need of wired network infrastructure. Due to the limited transmission range of nodes, the exchange of data between them may not be possible using direct communication. Partitioning the network into clusters and electing a clusterhead for each cluster to assist with the resource allocation and data packet transmissions among its members and neighboring clusterheads is one of the most common ways of providing support for the existing ad hoc routing protocols. This thesis presents the performance comparison of four ad hoc network clustering protocols: Dynamic Mobile Adaptive Clustering …
Ultrawideband Indoor Location And Tracking System, Qing Chen
Ultrawideband Indoor Location And Tracking System, Qing Chen
Electronic Theses and Dissertations
The objective of this thesis is to demonstrate an indoor intruder location and tracking system with UltraWideBand (UWB) technology and use data compression and Constant False Alarm Rate (CFAR) techniques to improve the performance of the location system. Reliable and accurate indoor positioning requires a local replacement for GPS systems since satellite signals are not available indoors. UWB systems are particularly suitable for indoor location systems due their inherent capabilities such as low-power, multi-path rejection, and wide bandwidth. In our application, we are using UWB radios as a radar system for tracking targets in indoor locations. We also use Discrete …
An Authentic Ecg Simulator, Paul Michalek
An Authentic Ecg Simulator, Paul Michalek
Electronic Theses and Dissertations
An ECG (electrocardiogram) simulator is an electronic tool that plays an essential role in the testing, design, and development of ECG monitors and other ECG equipment. Principally an ECG simulator provides ECG monitors with an electrical signal that emulates the human heart's electrical signal so that the monitor can be tested for reliability and important diagnostic capabilities. However, the current portable commercially available ECG simulators are lacking in their ability to fully test ECG monitors. Specifically, the portable simulators presently on the market do not produce authentic ECG signals but rather they endeavor to create the ECG signals mathematically. They …
Digital Controller Implementation For Disturbance Rejection In The Optical Coupling Of A Mobile Experimental Laser Tracking Systems, Matthew Rhodes
Digital Controller Implementation For Disturbance Rejection In The Optical Coupling Of A Mobile Experimental Laser Tracking Systems, Matthew Rhodes
Electronic Theses and Dissertations
Laser tracking systems are an important aspect of the NASA space program, in particular for conducting research in relation to satellites and space port launch vehicles. Often, launches are conducted at remote sites which require all of the test equipment, including the laser tracking systems, to be portable. Portable systems are more susceptible to environmental disturbances which affect the overall tracking resolution, and consequently, the resolution of any other experimental data being collected at any given time. This research characterizes the optical coupling between two systems in a Mobile Experimental Laser Tracking system and evaluates several control solutions to minimize …
Characterization Of Critical Network Components Of Coupled Oscillators, Gregory Holifield
Characterization Of Critical Network Components Of Coupled Oscillators, Gregory Holifield
Electronic Theses and Dissertations
This dissertation analyzes the fundamental limits for the determination of the network structure of loosely coupled oscillators based on observing the behavior of the network, specifically, node synchronization. The determination of the requisite characteristics and underlying behaviors necessary for the application of a theoretical mechanism for determining the underlying network topology in a network of loosely coupled natural oscillators are the desired outcome. To that end, this effort defines an analytical framework where key components of networks of coupled oscillators are isolated in order to determine the relationships between the various components. The relationship between the number of nodes in …
A Life Cycle Software Quality Model Using Bayesian Belief Networks, Justin Beaver
A Life Cycle Software Quality Model Using Bayesian Belief Networks, Justin Beaver
Electronic Theses and Dissertations
Software practitioners lack a consistent approach to assessing and predicting quality within their products. This research proposes a software quality model that accounts for the influences of development team skill/experience, process maturity, and problem complexity throughout the software engineering life cycle. The model is structured using Bayesian Belief Networks and, unlike previous efforts, uses widely-accepted software engineering standards and in-use industry techniques to quantify the indicators and measures of software quality. Data from 28 software engineering projects was acquired for this study, and was used for validation and comparison of the presented software quality models. Three Bayesian model structures are …
Ten Step Manufacturing Problem Solvingprocess, Afsoun Panahi
Ten Step Manufacturing Problem Solvingprocess, Afsoun Panahi
Electronic Theses and Dissertations
The ten step problem solving is created to capture and resolve all issues that arise with designing, developing, manufacturing and delivering a new vehicle produce. These steps will provide a common process, which effectively defines and resolves concerns and prevents their recurrence. Step 1: Prepare for the process Step 2: Establish Team Step 3: Describe the Problem Step 4: Develop short term containment action Step 5: Define and verify root cause and escape point Step 6: Choose and verify permanent corrective actions Step 7: Implement and validate permanent corrective actions Step 8: Prevent recurrence Step 9: Recognize team and individual …
Automated Visual Database Creation For A Ground Vehicle Simulator, Pedro Claudio
Automated Visual Database Creation For A Ground Vehicle Simulator, Pedro Claudio
Electronic Theses and Dissertations
This research focuses on extracting road models from stereo video sequences taken from a moving vehicle. The proposed method combines color histogram based segmentation, active contours (snakes) and morphological processing to extract road boundary coordinates for conversion into Matlab or Multigen OpenFlight compatible polygonal representations. Color segmentation uses an initial truth frame to develop a color probability density function (PDF) of the road versus the terrain. Subsequent frames are segmented using a Maximum Apostiori Probability (MAP) criteria and the resulting templates are used to update the PDFs. Color segmentation worked well where there was minimal shadowing and occlusion by other …
Synthesis Of Self-Resetting Stage Logic Pipelines, Rashad Oreifej
Synthesis Of Self-Resetting Stage Logic Pipelines, Rashad Oreifej
Electronic Theses and Dissertations
As designers began to pack multi-million transistors onto a single chip, their reliance on a global clocking signal to orchestrate the operations of the chip has started to face almost insurmountable difficulties. As a result, designers started to explore clockless circuits to avoid the global clocking problem. Recently, self-resetting circuits implemented in dynamic logic families have been proposed as viable clockless alternatives. While these circuits can produce excellent performances, they display serious limitations in terms of area cost and power consumption. A middle-of-the-road alternative, which can provide a good performance and avoid the limitations seen in dynamic self-resetting circuits, would …
Remote Sensing And Data Collection In A Marine Science Application, Isaac Abraham Horn
Remote Sensing And Data Collection In A Marine Science Application, Isaac Abraham Horn
Electronic Theses and Dissertations
In every field of science, research is driven by the data scjentists are able to collect. Specifically in the area of marine science, researchers at the Darling Marine Center (DMC) in Walpole, Maine study thc emergence events of undersea organisms. This thesis describes the development of a system integrating hardware infrastructure and existing software technology with a new software application, for the purpose of data acquisition at the DMC. In their research, a Tracor Acoustic Profiling System (TAPS), measures the water column density by utilizing sonar pulscs at several different frequencies. A serial interface provides access to the systems command …