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Articles 13291 - 13320 of 14008
Full-Text Articles in Entire DC Network
Financial Statement Analysis, Steelman Library
Financial Statement Analysis, Steelman Library
Syllabus Repository
No abstract provided.
Seeking Refuge In Urban America : Refugee Students In An International Public High School In California, Nabila Massoumi
Seeking Refuge In Urban America : Refugee Students In An International Public High School In California, Nabila Massoumi
Doctoral Dissertations
unavailable
The Relationship Of Reading Methods And Learning Styles To Taiwanese 12th Grade Male Students' Reading Comprehension In English, Yachi Teng
Doctoral Dissertations
unavailable
In Search Of Music Equity In An Urban Middle School, John Calloway
In Search Of Music Equity In An Urban Middle School, John Calloway
Doctoral Dissertations
unavailable
Demystifying Success : Critical Reflections Of African-American California Community College Students About Factors Leading To Scholastic Success During The First Year, Robert Lee Snowden
Demystifying Success : Critical Reflections Of African-American California Community College Students About Factors Leading To Scholastic Success During The First Year, Robert Lee Snowden
Doctoral Dissertations
unavailable
A Critical Hermeneutic Approach To Understanding Experiences Of Selected Afghan-Muslim-American Leaders Post-9/11 In The Diverse Bay Area, Belal A. Kaifi
A Critical Hermeneutic Approach To Understanding Experiences Of Selected Afghan-Muslim-American Leaders Post-9/11 In The Diverse Bay Area, Belal A. Kaifi
Doctoral Dissertations
unavailable
The Relationship Between Moving In Early Adolescence And Adolescents' First Employee-Type Jobs, Stuart J. Richardson
The Relationship Between Moving In Early Adolescence And Adolescents' First Employee-Type Jobs, Stuart J. Richardson
Doctoral Dissertations
unavailable
Organizational Change And Strategic Schooling For English Language Learners : A Case Study, Silvia Ramirez
Organizational Change And Strategic Schooling For English Language Learners : A Case Study, Silvia Ramirez
Doctoral Dissertations
unavailable
Students', Teachers', And Parents' Perspectives Of An African Centered Program : Þle Omode, Tiffany S. Wright
Students', Teachers', And Parents' Perspectives Of An African Centered Program : Þle Omode, Tiffany S. Wright
Doctoral Dissertations
unavailable
Voices From The Forest : Leadership Revealed Through Care, Shared Understanding, And Imagination, Don Kraft
Voices From The Forest : Leadership Revealed Through Care, Shared Understanding, And Imagination, Don Kraft
Doctoral Dissertations
unavailable
Student Perceptions Of The Higher Education Transfer Process From Two-Year To Four-Year Institutions : A Qualitative Study Viewed Through The Lenses Of Student Departure, Social Network, And Complexity Theories, Kevin Matthew Kelly
Doctoral Dissertations
unavailable
"So There We Were--" : The Stories Told By Chief Petty Officers In The United States Navy, Explored Through A Complexity Lens, Patricia Joanne Reily
"So There We Were--" : The Stories Told By Chief Petty Officers In The United States Navy, Explored Through A Complexity Lens, Patricia Joanne Reily
Doctoral Dissertations
unavailable
Oxidative Stress, Calcium Homeostasis, And Altered Gene Expression In Human Lung Epithelial Cells Exposed To Zno Nanoparticles, Chuan-Chin Huang
Oxidative Stress, Calcium Homeostasis, And Altered Gene Expression In Human Lung Epithelial Cells Exposed To Zno Nanoparticles, Chuan-Chin Huang
Masters Theses
"The influence of 20 nm ZnO nanoparticles on oxidative stress, intracellular calcium homeostasis, and gene expression was studied in human bronchial epithelial cells (BEAS-2B). ZnO caused a concentration- and time-dependent cytotoxicity while elevating oxidative stress and causing membrane damage (cellular LDH release). There was a remarkably steep relationship between concentration and toxicity at concentrations from 5 to 10 μg/ml. Exposure to ZnO increased intracellular calcium levels in a concentration- and time-dependent manner. Treatment with the antioxidant N-acetylcysteine prevented cell loss and diminished the increase in intracellular calcium concentration, suggesting oxidative stress mediated cytotoxicity. Exposure to a sublethal concentration of ZnO …
Environmental Geochemistry Of Metal Contaminated Sediments From The Big River System Of Southeastern Missouri, Helen Carrie Bender
Environmental Geochemistry Of Metal Contaminated Sediments From The Big River System Of Southeastern Missouri, Helen Carrie Bender
Masters Theses
"Geochemical analysis of stream sediments from the Big River Watershed of southeastern Missouri indicates that they contain elevated concentrations of contaminant metals such as Pb. Zn, Cu. Co, Ni and Cd. The elevated concentrations are derived from natural exposures of metal enriched strata and the numerous mine tailings piles and water seeps created as a result of about 300 years of lead-zinc mining in the “Old Lead Belt”. Galena (PbS), sphalerite (ZnS), and pyrite (FeS2) are the primary sulfides found in the tailings piles and Scanning Electron Microscopy analysis of individual metallic sediment particles collected at intervals downstream …
Anchorage And Bond Characteristics Of Externally Bonded Frp Laminates Used For Shear Strengthening Of Rc And Pc Girders, Carlos Andres Ortega Ordonez
Anchorage And Bond Characteristics Of Externally Bonded Frp Laminates Used For Shear Strengthening Of Rc And Pc Girders, Carlos Andres Ortega Ordonez
Masters Theses
"In the last three decades, the use of fiber reinforced polymer (FRP) materials to strengthen structures externally has emerged as one of the most promising technologies in materials and structural engineering, and these materials have been gaining popularity in the civil engineering community. Externally bonded FRP sheets and laminates have been used successfully to increase flexural and shear capacity. The overall performance of the strengthened system depends heavily on the quality of the bond between the concrete and the FRP laminate. Low bond strength can cause delamination at the fiber-matrix interface and at the FRP laminate-concrete interface. As a result, …
The Development And Application Of The Complete Time-Domain Trl Calibration Technique, Hongxia Ning
The Development And Application Of The Complete Time-Domain Trl Calibration Technique, Hongxia Ning
Masters Theses
"The first paper in the thesis discussed the development of a complete time-domain THRU-REFLECT-LINE (t-TRL) calibration technique. To validate the error correction technique, two stripline TRL test fixtures are designed and measured by two TDR instruments respectively. The t-TRL calibration is implemented to the recorded TDR/TDT waveforms and the comparison of the magnitude and phase results of S-parameters obtained by t-TRL and VNA TRL shows excellent agreement up to 25GHz.
In the second paper, the application of t-TRL calibration technique to the Root Impulse Energy (RIE) loss calculation is discussed. The RIE loss is theoretically derived for the matched network …
Applications Of Swarm, Evolutionary And Quantum Algorithms In System Identification And Digital Filter Design, Bipul Luitel
Applications Of Swarm, Evolutionary And Quantum Algorithms In System Identification And Digital Filter Design, Bipul Luitel
Masters Theses
"The thesis focuses on the application of computational intelligence (CI) techniques for two problems - system identification and digital filter design. In system identification, different case studies have been carried out with equal or reduced number of orders as the original system and also in identifying a blackbox model. Lowpass, Highpass, Bandpass and Bandstop FIR and Lowpass IIR filters have been designed using three algorithms using two different fitness functions. Particle Swarm Optimization (PSO), Differential Evolution based PSO (DEPSO) and PSO with Quantum Infusion (PSO-QI) algorithms have been applied in this work"--Abstract, page iii.
The Effects Of Technology On Literacy(S), Thomas Glen Petersen
The Effects Of Technology On Literacy(S), Thomas Glen Petersen
Masters Theses
"One of the challenges when measuring the effects of technology on literacy(s) is finding a control group where technology; does not play a major role in the culture. The Amish successfully live in a Technocracy where mechanical/electronic tools are used only when absolutely necessary; the Amish are not dependent on them for survival. The crux of the Amish philosophy is humility, serving the community and serving God. Ironically, they have suffered tremendous repercussions for adopting a wholesome, selfless lifestyle which is contrary to most popular world views, regardless of religious or spiritual views"--Purpose, page 40.
Information Flow Properties For Cyber-Physical Systems, Rav Akella
Information Flow Properties For Cyber-Physical Systems, Rav Akella
Masters Theses
"In cyber-physical systems, which are the integrations of computational and physical processes, security properties are difficult to enforce. Fundamentally, physically observable behavior leads to violations of confidentiality. This work analyzes certain noninterference based security properties to ensure that interactions between the cyber and physical processes preserve confidentiality. A considerable barrier to this analysis is the representation of physical system interactions at the cyber-level. This thesis presents encoding of these physical system properties into a discrete event system and represents the cyber-physical system using Security Process Algebra (SPA). The model checker, Checker of Persistent Security (CoPS) shows Bisimulation based NonDeducibility on …
Decision-Based Design Under Uncertainty With Intervals, Sashank Vasireddy
Decision-Based Design Under Uncertainty With Intervals, Sashank Vasireddy
Masters Theses
"Design requires a series of decisions, and one of the major challenges engineering designers face is making decisions under uncertainty. The engineering designer must choose the best design among various alternatives. This work evaluates the use of utility functions to make decisions under uncertainty with both random and interval variables. Uncertainty cannot be eliminated completely, but it can be reduced. Most current methods treat only aleatory uncertainty. Here, however, both aleatory and epistemic uncertainties are addressed in the context of engineering design. Methods such as moment matching method and worst case analysis are used to incorporate uncertainty into design problems"--Abstract, …
Continuous Control Of Lunar Orbits Via Electric Propulsion, Sunil Aggarwal
Continuous Control Of Lunar Orbits Via Electric Propulsion, Sunil Aggarwal
Masters Theses
"To find definite answers for the presence of water on the poles of Moon, to facilitate selection of future lunar landing sites and aid in construction of architectural bases, to assist proper lunar resource utilization and to improve lunar gravity models there is a great interest and need for highly accurate, reliable and efficient lunar surface mapping and communication. This thesis is intended to aid in proper selection of orbits for future lunar missions by demonstrating the impact of using electric propulsion on the search space of feasible and useful lunar orbits. The requirements for future lunar mapping and communication …
Modeling And Simulation Of Electrochemical Magneto Hydro Dynamics, Debamoy Sen
Modeling And Simulation Of Electrochemical Magneto Hydro Dynamics, Debamoy Sen
Masters Theses
"This thesis focuses on how the electrochemical magneto hydro dynamic problem is solved through numerical simulation for a two dimensional millielectrode electrochemical cell and a three dimensional microelectrode array cell. Electrochemical processes are enhanced by magnetic fields through the introduction of body forces such as Lorentz force. Through modeling and numerical simulations, experimental results can be integrated with theory. Such simulations will aid in the prediction of mass transfer limited currents and visualization of flow profiles in an electrochemical cell. The numerical solution of the equation system is made possible by the finite volume method used in the FLUENT Computational …
Electricity Generation And Ethanol Production Using Iron-Reducing, Haloalkaliphilic Bacteria, Varun Paul
Electricity Generation And Ethanol Production Using Iron-Reducing, Haloalkaliphilic Bacteria, Varun Paul
Masters Theses
"Microbial life in extreme environments has been studied primarily for their metabolic activities. Very few commercial or industrial applications have been known from these systems. In this study, the metabolic pathways and properties of bacteria from a haloalkaliphilic environment of Soap Lake, Washington were employed in two research applications related to energy production. In the first study, the bacterial cultures that were known to reduce iron (III) were used in a Microbial Fuel Cell (MFC) reactor. Iron reducing bacteria have shown to shunt their electrons on to the surface of a carbon electrode of an MFC, and the electrons can …
Exploring The Use Of A Commercial Game Engine For The Development Of Educational Software, Hussain Alafaireet
Exploring The Use Of A Commercial Game Engine For The Development Of Educational Software, Hussain Alafaireet
Masters Theses
"Three-dimensional visualization and simulation environments are becoming increasingly important in both industrial and educational environments. However, developing these simulations can be a difficult and expensive task. Herein we explore the use of a commercial game engine to develop a 3-D, interactive computer game designed to teach players about the anatomy of a frog. The goal of this project is threefold: 1) to develop high-fidelity virtual reality educational software with a limited budget and limited personnel, 2) to define a software development process by which similar simulations can be developed, and 3) to explore the benefits that these simulations provide to …
Modeling Of Vias And Via Arrays In High Speed Printed Circuit Boards, Arun Reddy Chada
Modeling Of Vias And Via Arrays In High Speed Printed Circuit Boards, Arun Reddy Chada
Masters Theses
"This thesis presents modeling approaches for fast calculation of signals in dense via arrays in high speed printed circuit boards (PCBs) and model to hardware correlation study of solid and perforated disk resonators. A 2D finite difference (FD) method to extract the via capacitance which includes the via pad capacitance obtained by solving the laplace equation in the via domain in multi-layer geometries is presented and validated with analytical formulation for via capacitance. Next, closed-form expression for the impedance of an infinitely large parallel plane pair is derived and validated by comparing with cavity model for several numerical examples. The …
Numerical Modeling And Analysis Of Complex Electromagnetic Structures, Including Those Containing Ferrites, Andrea Orlando
Numerical Modeling And Analysis Of Complex Electromagnetic Structures, Including Those Containing Ferrites, Andrea Orlando
Masters Theses
"Application of fast switching amplifiers in power converters, and especially in power inverters, causes unwanted radiated emission, which is a consequence of common mode (CM) currents arising in feed wire bundles. Ferrite chokes are commonly used to suppress those CM currents by increasing the CM impedance of circuits without affecting the differential mode currents, which is important for undisturbed operation of the converters or inverters. Their effective impedance is the main design concern, and it is determined by the material intrinsic properties (permeability, permittivity) and geometry. The goal of this work is to analytically correlate the geometrical and material properties …
Reliability-Based Design With System Reliability And Design Improvement, Gagandeep Singh Saini
Reliability-Based Design With System Reliability And Design Improvement, Gagandeep Singh Saini
Masters Theses
"This thesis focuses on developing a methodology for accurately estimating series system probability of failure. Existing methods for series system based design optimization are not that accurate because they assign reliability to each failure mode; as a result complete system reliability goes down. According to method proposed in this work, the user will assign required system reliability at the start and then optimizer will apportion reliability to every failure mode in order to meet required system reliability level. Detlevson second order upper bounds are used to estimate system probability of failure. Several examples have been shown to verify the results …
Fault Detection And Prediction With Application To Rotating Machinery, Gary R. Halligan
Fault Detection And Prediction With Application To Rotating Machinery, Gary R. Halligan
Masters Theses
"In this thesis, the detection and prediction of faults in rotating machinery is undertaken and presented in two papers. In the first paper, Principal Component Analysis (PCA), a well known data-driven dimension reduction technique, is applied to data for normal operation and four fault conditions from a one-half horsepower centrifugal water pump. Fault isolation in this scheme is done by observing the location of the data points in the Principal Component domain, and the time to failure (TTF) is calculated by applying statistical regression on the resulting PC scores. The application of the proposed scheme demonstrated that PCA was able …
Formation Of Iron-Rimmed Sandstone Nodules On Earth; Terrestrial Analogue For The Formation Of Martian Blueberries?, Katherine Charlotte Muller
Formation Of Iron-Rimmed Sandstone Nodules On Earth; Terrestrial Analogue For The Formation Of Martian Blueberries?, Katherine Charlotte Muller
Masters Theses
"NASA's twin Mars Exploration Rovers, MER, Spirit and Opportunity, have identified numerous geologic features that hint at a watery past on Mars noted in Malik, 2004. Prominent among these features are the "Martian Blueberries" that occur as spherical hematite (Fe₂O₃) nodules. Hematite formation is facilitated by the presence of water, although there are presently no known sources of free liquid water on Mars. Chan et al., 2004 states that these "blueberries" are also similar to nodules found in the Jurassic aged Navajo Sandstone in Utah. An understanding of the processes controlling the formation of the Utah nodules may thus be …
General Formulation Of The Scattered Matter Waves By A Quantum Shutter, Yusuf Zi̇ya Umul
General Formulation Of The Scattered Matter Waves By A Quantum Shutter, Yusuf Zi̇ya Umul
Turkish Journal of Physics
The scattering process of matter waves by a quantum shutter is investigated by using the spectrum integral representation. The scattered fields are expressed in terms of the Fresnel function. It is shown that the obtained equation gives the Moshinsky function for a one dimensional problem of the plane wave. Also a general integral representation is derived for two dimensional problems. The scattering of matter waves for some special wave-packets are examined analytically and numerically.