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Articles 1711 - 1740 of 4905
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An Artificial Life Approach To Evolutionary Computation: From Mobile Cellular Algorithms To Artificial Ecosystems, Shivakar Vulli
An Artificial Life Approach To Evolutionary Computation: From Mobile Cellular Algorithms To Artificial Ecosystems, Shivakar Vulli
Masters Theses
"This thesis presents a new class of evolutionary algorithms called mobile cellular evolutionary algorithms (mcEAs). These algorithms are characterized by individuals moving around on a spatial population structure. As a primary objective, this thesis aims to show that by controlling the population density and mobility in mcEAs, it is possible to achieve much better control over the rate of convergence than what is already possible in existing cellular EAs. Using the observations and results from this investigation into selection pressure in mcEAs, a general architecture for developing agent-based evolutionary algorithms called Artificial Ecosystems (AES) is presented. A simple agent-based EA …
Evaluation Of Metal Detection Audio Alert Signals Of An/Pss-14 By Means Of Real Time Visualization, Sandesh Srikantaiah Chandrashekar
Evaluation Of Metal Detection Audio Alert Signals Of An/Pss-14 By Means Of Real Time Visualization, Sandesh Srikantaiah Chandrashekar
Masters Theses
"The sweep arm of the AN/PSS-14 Landmine Detector attached to an independent visualization device will transform the AN/PSS-14 into a hand-held data acquisition system for conversion of real time MD and GPR audio alert signals into captured visual trace displays on an on-board PDA computer screen so that momentary sounds of millisecond durations can be captured and displayed for visual scrutiny and interpretation by analytical on-board data processing procedures. This is a part of a two-man team that is developing a visual data adapter for the AN/PSS-14 Landmine Detector where the current thesis is concentrating only on MD audio alerts. …
Zinc Iron Phosphate Glasses For Enameling Applications, Sagnik Saha
Zinc Iron Phosphate Glasses For Enameling Applications, Sagnik Saha
Masters Theses
"New compositions of low temperature black glasses were developed that are suitable as frits for enameling soda-lime silicate (S-L-S) glass substrates. Zinc iron phosphate glasses are of interest for this application because they possess dilatometric low softening points (under 600ºC) and have coefficients of thermal expansion that are compatible with S-L-S glass (in the range 90-110x10⁻⁷/ºC). The development of compositions with excellent chemical durability, particularly in acidic conditions, is also desired. Compositional modification were made to the (Na₂O+K₂O)·ZnO·MnO·Fe₂O₃·P₂O₅ glass system using design of experiments. The compositional boundaries used in the design were based on earlier work at Missouri S&T. The …
Minimize End-To-End Delay Through Cross-Layer Optimization In Multi-Hop Wireless Sensor Networks, Yibo Xu
Minimize End-To-End Delay Through Cross-Layer Optimization In Multi-Hop Wireless Sensor Networks, Yibo Xu
Masters Theses
"End-to-end delay plays a very important role in wireless sensor networks. It refers to the total time taken for a single packet to be transmitted across a network from source to destination. There are many factors could affect the end-to-end delay, among them the routing path and the interference level along the path are the two basic elements that could have significant influence on the result of the end-to-end delay. This thesis presents a transmission scheduling scheme that minimizes the end-to-end delay when the node topology is given. The transmission scheduling scheme is designed based on integer linear programming and …
Comparing The Chelating Abilities Of N-Acetylcysteine And N-Acetylcysteine Amide In Vitro For Lead Poisoning Treatment, Weiqing Chen
Comparing The Chelating Abilities Of N-Acetylcysteine And N-Acetylcysteine Amide In Vitro For Lead Poisoning Treatment, Weiqing Chen
Masters Theses
"Lead poisoning is a perennial and serious health problem around the world. The daily widespread use of lead has dramatically increased the degree and longevity of its exposure to humans, exacerbating the task of lead poisoning treatment. Lead exerts adverse effects on cardiovascular, central nervous, renal, gastrointestinal, and reproductive systems. The common treatment for lead poisoning is chelation therapy. Chelators were proposed to treat lead poisoning a very long time ago. However, chelators have severe side effects that could cause more problems, in addition to lead poisoning. Therefore, another group of drugs has been suggested --- antioxidants. This type of …
Cloud Security Requirements Analysis And Security Policy Development Using A High-Order Object-Oriented Modeling Technique, Kenneth Kofi Fletcher
Cloud Security Requirements Analysis And Security Policy Development Using A High-Order Object-Oriented Modeling Technique, Kenneth Kofi Fletcher
Masters Theses
"Security continues to be a major challenge for cloud computing, and it is one that must be addressed if cloud computing is to be fully accepted. Most technological means of securing non-cloud computing systems can be either applied directly or modified to secure a cloud; however, no integrated model-based methodology is yet available to analyze cloud security requirements and develop policy to deal with both internal and external security challenges. This work proposes just such a methodology and demonstrates its application with specific cases. Cloud assets are represented by high order object models, and misuse cases together with malactivity swimlane …
Cretaceous/Paleogene Boundary Biostratigraphy And Palynofacies Of The Alo-1 Well, Southeastern Nigeria, Janet Diane Raymer
Cretaceous/Paleogene Boundary Biostratigraphy And Palynofacies Of The Alo-1 Well, Southeastern Nigeria, Janet Diane Raymer
Masters Theses
"The Cretaceous/Paleogene boundary (K/Pg) has been studied in great detail because of the fascination most people have with the extinction of the dinosaurs. The response of the vegetation to this extinction event has been studied in detail in mid to high latitudes, but little is known about what happened in the tropics. Sixty-seven samples from the Nsukka and Imo formations in the Alo-1 well in the Anambra Basin, southeastern Nigeria have been studied for their palynological contents. The aims of the study was to use spores, pollen and dispersed organic matter components to interpret biostratigraphy, and evaluate depositional conditions across …
Calcium Carbonate Precipitation Mechanisms And Geochemical Analysis Of Particulate Material Found Within The Waters Of Maramec Spring, St. James, Missouri, Kyle Steven Rybacki
Calcium Carbonate Precipitation Mechanisms And Geochemical Analysis Of Particulate Material Found Within The Waters Of Maramec Spring, St. James, Missouri, Kyle Steven Rybacki
Masters Theses
"The purpose of the present study is to determine whether a mineral phase is precipitating from solution in the natural Maramec Spring system giving the spring water a milky blue color, to identify the mineral phase, and to investigate potential mechanisms for inducing precipitation. Maramec Spring is a first-order magnitude spring located 11 km southeast of St. James, Missouri. The water that expels from Maramec Spring varies between being near saturation, but undersaturated in calcium, with respect to calcite (saturation index of 0.994 mg/L). Moving downstream, away from the conduit, the spring waters increase in pH and temperature. Eh is …
Modeling The Practical Performance Of Switched-Capacitor Converters And A Method For Automating State-Space Model Generation, Jordan M. Henry
Modeling The Practical Performance Of Switched-Capacitor Converters And A Method For Automating State-Space Model Generation, Jordan M. Henry
Masters Theses
"A new modeling technique and a method for automating the modeling process are introduced for analyzing complex switched-capacitor (SC) converters. The model uses conventional circuit analysis methods to derive state-space models of each switching state. Steady-state performance is derived and expressed as an equivalent resistance. Whereas previous techniques have provided either the detailed performance of a simple SC converter or the limiting performance of a complex SC converter, this new model is flexible enough to provide detailed performance for any practical converter. Nonuniform component choices, asymmetric duty cycles, and other deviations from an ideal converter can be readily included. Dynamics …
A Hybrid Problem-Based And Just-In-Time Inductive Teaching Method For Failure Analysis Instruction, Ryan Michael Arlitt
A Hybrid Problem-Based And Just-In-Time Inductive Teaching Method For Failure Analysis Instruction, Ryan Michael Arlitt
Masters Theses
"When engineers retire, they take their expert knowledge with them. Preservation of this expert knowledge in a usable form is beneficial for the advancement of any engineering field. Risk in Early Design (RED) is one method for preserving expert risk analysis knowledge. The first purpose of this paper is to examine the usability of RED when incorporated with a hybrid problem-based and just-in-time inductive teaching method for failure analysis instruction. The second purpose of this paper is to propose and perform steps toward verification and validation of the RED methodology and implementation. Evaluation metrics were developed, and several of these …
Analysis Of Nationwide Intercity Travel Demand On The Us Transportation Network, Tao Li
Analysis Of Nationwide Intercity Travel Demand On The Us Transportation Network, Tao Li
Masters Theses
"In this thesis, three issues about the intercity travel demand on the US transportation network are addressed. The final one is the estimation of the domestic passengers' delay cost. A scheme is designed by assuming that costs incurred by flight delays relative to the original flight schedules are imposed at passengers' final destination airports. It is applied to estimate the total domestic delay cost of year 2007 and reasonable results arc obtained. The second one is the air travel demand estimation. Two route-based optimization models are proposed to estimate the travel demand based on available data. It is shown that …
Crash Causal Factors: Crash Frequency, Crash Severity And Crash Collision Models, Bhanu Sireesha Javvadi
Crash Causal Factors: Crash Frequency, Crash Severity And Crash Collision Models, Bhanu Sireesha Javvadi
Masters Theses
"This study examined the variables related to roadway geometry, environmental, driver and traffic factors to identify crash causal factors. It relied on three years of crash data from the Arkansas Highway Transportation Department (AHTD) and analyzed nonjunctions of rural and urban US highway systems. In the first part of this study, negative binomial modeling technique was used to model the frequency of crash occurrence. To further analyze the crash factors this study also analyzed crash severity and collision types. The second part identified the factors responsible for severe crashes and fatalities including using the binary logistic regression modeling technique. The …
Finite Element Modeling Of Bird Strikes And Parametric Evaluation Using Design Of Experiments (Doe), Venkata Varaha Raja Naga Prathyush Bheem Reddy
Finite Element Modeling Of Bird Strikes And Parametric Evaluation Using Design Of Experiments (Doe), Venkata Varaha Raja Naga Prathyush Bheem Reddy
Masters Theses
"One of the major threats to Aviation industry is the in-flight impact of birds. Aircraft windshields are intensively vulnerable to damage and hence need a certification requirement for a proven level of impact resistance. Bird strike experiments are very expensive and henceforth explicit numerical modeling techniques have grown importance. This compilation mainly relies on the theory of hydrodynamic impact and addresses basic shockwave equations. A smooth particle hydrodynamics based approach is chosen and the numerical simulation is carried out using contact-impact coupling algorithm. The simulation is run using the nonlinear explicit finite element code LSDYNA ver.971, developed by Lawrence Livermore …
Gpu Based Processing For Airborne Detection, Dheeraj Singiresu
Gpu Based Processing For Airborne Detection, Dheeraj Singiresu
Masters Theses
"Onboard real-time processing is highly desirable in airborne detection applications. As the data processing involved here is computationally expensive, typically high power multi-rack system is required to achieve real-time detection. Use of such hardware is often not feasible in an airborne application due to space, power and weight constraints. In this thesis, different computing architectures suitable for real-time onboard processing are compared in terms of computation speed, watts/GFLOPS, and weight/GFLOPS. A brief description of the modem GPU architecture and the current GPGPU technology is provided. GPU implementations of some computationally expensive image processing applications such as band-to-band registration for Multi …
Using Value Stream Mapping For Cost Modeling, Emily Marie Tucker
Using Value Stream Mapping For Cost Modeling, Emily Marie Tucker
Masters Theses
"This thesis presents an effective cost model for the Selective Laser Sintering (SLS) process used in additive manufacturing practices. The various factors that influence the total cost of a build on both small and large frame machines are discussed. These attributes, which include labor and overhead rates, material costs, and process times, combine to generate the driving force behind a manufacturer's decision to use the small or large SLS machine for mass production. By developing and evaluating a current state value stream map for the small SLS machine, a financial analysis of the SLS process can be performed. By assigning …
Optimal Integrator-Less Tracking Controller For Uncertain Systems, Anusha Mannava
Optimal Integrator-Less Tracking Controller For Uncertain Systems, Anusha Mannava
Masters Theses
"Tracking controllers are designed to drive the system on the desired trajectory with minimum error. In real life, all systems have uncertainties such as friction, modeling inaccuracies or damage that cause the performance to deviate from the ideal response. This research is aimed at addressing the tracking problem in the optimal context and a generalized method to handle the uncertainties is proposed. In the first paper, an optimal tracking controller without an integral component is formulated for a linear system. This design can handle time varying, non-zero references and effectively alleviates the risk of 'wind up'. A neural network based …
Bayesian Approaches On Observational Before-After Highway Safety Analysis, Daxiao Liu
Bayesian Approaches On Observational Before-After Highway Safety Analysis, Daxiao Liu
Masters Theses
"Observational before-after evaluation of roadway safety treatments effect is a necessary and challenging study area for traffic safety engineers. In decades, empirical Bayesian approach has been widely adopted among researchers in this area. In this approach, the researcher combined before period observation data with a safety performance function estimated from similar groups to estimate the expected number of crashes that would have occurred in the after period without the treatment. Comparing this estimate with the number of crashes observed in the after period, the researcher evaluated the effectiveness of the treatment. This approach accounts for well-known regression-to-the-mean effects. However, as …
Evaluation Of Variable Speed Limits Using A Genetic Algorithm Approach To Calibrate A Vissim Model, Brian Joseph Schaefer
Evaluation Of Variable Speed Limits Using A Genetic Algorithm Approach To Calibrate A Vissim Model, Brian Joseph Schaefer
Masters Theses
"The variable speed limit (VSL) system has been adopted on more and more roadways across the globe as an engineering tool for controlling traffic flow, particularly during congestion situations. An important and fundamental question raised among traffic engineers is: Are the costs of installing and operating variable speed limits really justified? In order to answer this question, this thesis measures the effectiveness of the VSL system applying the VISSIM microscopic simulation model to a non-recurrent congestion situation. For the analysis, a section of interstate was modeled in VISSIM and calibrated so that the simulated results closely reproduce the observed data …
Impact Of Management Status, Gender, And Level Of Project Involvement On Corporate Governance In A Role-Based Enterprise Portal Environment, Daniel Augusto Pereira Brás Sequeira
Impact Of Management Status, Gender, And Level Of Project Involvement On Corporate Governance In A Role-Based Enterprise Portal Environment, Daniel Augusto Pereira Brás Sequeira
Masters Theses
"The underlying objective of this research project is to investigate the impact of management status, gender, and level of project involvement on corporate governance in a role-based enterprise portal environment. This is achieved through a case study which included the development of a role-based enterprise portal site prototype assessed through surveys targeted at different stakeholders at the case company. Six hypotheses were formulated addressing the core research question. The outcomes of the hypotheses testing suggest employees' perceptions of role-based enterprise portal's effectiveness, usability, and corporate identity design are, in general, not influenced by the employees' management role, gender, and project …
Target Detection And Feature Evaluation Of Airborne Mine Target Images, Deepika Kamakshi Timmavajjula
Target Detection And Feature Evaluation Of Airborne Mine Target Images, Deepika Kamakshi Timmavajjula
Masters Theses
"Target segmentation and detection problem is one of the preliminary approaches in analyzing an image. Many edge, region and texture based techniques have been proposed in literature. These techniques often have limitations based on types of image data, kind of segmentation of interest and the problem domain. Mine detection problem dealt with for this thesis has mine target images which have a center target consisting of false alarm or mine patch which has to be detected and features evaluated to evaluate various parameter performances. Thus, segmenting the mine patch becomes the first step of analyzing these images. This thesis is …
The Marketing Value Of Graduate Certificate Programs In Higher Education: A Strategic Assessment, Susmitha Akula
The Marketing Value Of Graduate Certificate Programs In Higher Education: A Strategic Assessment, Susmitha Akula
Masters Theses
"The last five years have seen a significant increase in the popularity of non degree graduate certificates. This increase has raised questions about the value of graduate certificate programs from the perspective of students, alumni and industry employers. Do certificate programs provide real world skills and knowledge valuable to industry? Do they serve as effective recruiting tools for the university? Do they provide opportunities for students to meet their professional goals in terms of salary increase, promotions, and the like? The present research is specifically aimed at answering these questions. Surveys that assess perceptions of value of graduate certificates to …
Developing A Model For Evaluating Software Tools In Education, Vedant Jain
Developing A Model For Evaluating Software Tools In Education, Vedant Jain
Masters Theses
"This thesis proposes a research model to evaluate computer-mediated learning technology, user acceptance of the technology, and the effect of the technology on learning outcomes. This thesis also introduces two innovative research techniques for such evaluations, that is, eye-tracking and the think aloud protocol. Think aloud protocol allows us to understand a user's state of mind while he/she is interacting with the system. Eye-tracking provides additional insights into a user's cognitive state while using the system and can help triangulate the results. We demonstrated the application of the research model and research techniques in evaluating visualization software designed in a …
Establishing Workload Limitations For Application In Human Systems Integration, Muhammet Servet Gulum
Establishing Workload Limitations For Application In Human Systems Integration, Muhammet Servet Gulum
Masters Theses
"As the amount of technology involved in the typical workplace increases and standard operational procedures become increasingly sophisticated the danger of overloading an operator's mental resources is increasing. As much as these technological developments help operators with daily tasks, for example by providing information via monitors and wireless headsets; it also increased the mental workload due to the bombardment of information. Mental workload is commonly associated with information processing tasks, limits. With all the extra information inputs it is difficult to set limits where excessive information becomes dangerous. The workload optimization is critical as it directly affects system performance and …
Palynology Of The Middle To Upper Eocene Esmeraldas Formation In The Nuevo Mundo Syncline Area, Middle Magdalena Valley Basin, Colombia, Guillermo Rodriguez-Forero
Palynology Of The Middle To Upper Eocene Esmeraldas Formation In The Nuevo Mundo Syncline Area, Middle Magdalena Valley Basin, Colombia, Guillermo Rodriguez-Forero
Masters Theses
"The palynology of the Eocene Esmeraldas Formation in the Middle Magdalena Valley Basin, Colombia was analyzed in order to constrain the age of the unit. This formation is a very important oil reservoir in the Middle Magdalena Valley Basin, which is a product of a fragmentation of a Cenozoic foreland basin by the Northern Andes. It created structural complexities and syntectonic deposition. The lateral continuity of the formation, as well as its correlations with lithostratigraphic units is adjacent basins, are not clearly understood. The Los Corros Fossil Horizon, a mollusk horizon in the upper part of the Esmeraldas Formation, is …
Doubly Fed Induction Generator With Integrated Energy Storage System For Smoothening Of Output Power, Nishant Swaraj Chouhan
Doubly Fed Induction Generator With Integrated Energy Storage System For Smoothening Of Output Power, Nishant Swaraj Chouhan
Masters Theses
"Wind energy is one of the fastest growing renewable energies in the world today. However, integration of wind power into the power system network is still confronting many challenges. One of the main challenges is the suppression of wind power fluctuations. This thesis focuses on integration of wind power with energy storage to overcome the integration challenges. The first part of this thesis investigates the suitability of energy storage systems for transmission, distribution and wind farm applications. A review on the available energy storage systems is performed considering several criteria. Efforts are made to investigate solutions that meet all the …
Strategic Process Integration Of Energy And Environmental Systems In Wastewater Treatment Plants, Bharath Kumar Gangichetty
Strategic Process Integration Of Energy And Environmental Systems In Wastewater Treatment Plants, Bharath Kumar Gangichetty
Masters Theses
"Green environmental practices are increasingly important in combating serious global energy and environmental issues. Most wastewater treatment facilities were built when energy costs were not a concern; however, an increasing demand for energy, changing climatic conditions, and constrained energy supplies have resulted in the need to apply more energy-conscious choices in the maintenance or upgrade of existing wastewater treatment facilities. A detailed analysis of the majority of water and wastewater treatment services shows that most facilities operate far below the efficiency levels needed for effective energy use. Failure to comply with regulated environmental standards is also a problem. Although standards …
Integrating A Variety Of Cultures And Diversity Into The Upper Elementary Curriculum, Tammy Joy Hamlin
Integrating A Variety Of Cultures And Diversity Into The Upper Elementary Curriculum, Tammy Joy Hamlin
Masters Theses
Research has overwhelmingly shown that something needs to be done to combat the increasing problem of high minority drop-out rates. Many people still do not acknowledge that schools need to do anything differently. Instead the problem is blamed on the home life and economics. Some teachers feel that low-income inner city, minority students, simply are not capable of being successful academically. Society often does not realize how poor the minority drop out rates are in their school districts. Some administrations have chosen to hide the statistics. For instance one New York school district in this research promoted that almost all …
Christianity And Communication: Kierkegaard, Hamann, And The Necessity Of Indirect Communication, Benjamin D. Cates
Christianity And Communication: Kierkegaard, Hamann, And The Necessity Of Indirect Communication, Benjamin D. Cates
Masters Theses
In 1849, Kierkegaard praised Hamann's dedication to written and spoken language as derived from the Divine Logos. This thesis examines Hamann and Kierkegaard in order to understand both thinkers' impact upon verbal and written communication. Hamann's dedication to the idea of communication as given graciously and solely by God is apparent in his authorship. Kierkegaard's model of indirect communication is ultimately one of Christian existence. Given the fact that Kierkegaard owed much to Hamann and was perhaps even led back to faith in God through his exhaustive reading of the German linguist, this thesis examines the possibility of a Hamannian …
Hesitation: An Analysis Of Candide, Jared T. Mink
Hesitation: An Analysis Of Candide, Jared T. Mink
Masters Theses
Candide calls into question its merit as literature or philosophy because it draws its reader into eisegesis. The act of interpreting Candide is never a cool judgment. The enigmatic ending forces the reader to see that acts of judgment are appetitive: Desires shape judgment; judgment plies desire. Candide's behavior reveals eighteenth century interest in "the body," which was the scientist's chief tool in entering "the void" to explore the integrity of new knowledge. We see this body interest in Locke's Essay and, through a concept of "hesitation," we can see that Voltaire absorbed Lock's view of the interconnection between judgment …
Expunging Father Time: The Search For Temporal Transcendence In The Novels Of Aldous Huxley And Tom Robbins, Stephanie Abigail Taylor
Expunging Father Time: The Search For Temporal Transcendence In The Novels Of Aldous Huxley And Tom Robbins, Stephanie Abigail Taylor
Masters Theses
This study explores the connection between the time concepts of Aldous Huxley and Tom Robbins. For both authors, time imprisons man on two fronts, or in two cages, if you will. The smaller of these cages is society's concept of time, clock time, which constrains the activities of man, forcing him to submit to his fate as a mere drone operating on the assembly line of life. In this prison, man cannot take the proper time to commune with nature, to look inward at himself and his life, or to focus on the real meaning and goal of life--escape from …