Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Engineering (1811)
- Physical Sciences and Mathematics (573)
- Electrical and Computer Engineering (351)
- Materials Science and Engineering (292)
- Chemical Engineering (286)
-
- Mechanical Engineering (253)
- Civil and Environmental Engineering (216)
- Civil Engineering (175)
- Computer Sciences (149)
- Earth Sciences (133)
- Education (129)
- Biomedical Engineering and Bioengineering (123)
- Chemistry (113)
- Operations Research, Systems Engineering and Industrial Engineering (102)
- Geology (99)
- Petroleum Engineering (92)
- Physics (88)
- Geophysics and Seismology (86)
- Mining Engineering (85)
- Metallurgy (83)
- Nanoscience and Nanotechnology (77)
- Mathematics (71)
- Geological Engineering (66)
- Nuclear Engineering (65)
- Ceramic Materials (61)
- Aerospace Engineering (59)
- Life Sciences (54)
- Social and Behavioral Sciences (49)
- Computer Engineering (47)
- Medicine and Health Sciences (38)
- Institution
- Keyword
-
- Engineering (195)
- Applied sciences (69)
- Chemistry (67)
- Biology (59)
- Physics (58)
-
- Education (56)
- Mechanical (48)
- Pure sciences (47)
- Civil (40)
- Electronics and Electrical (38)
- Machine Learning (37)
- Environmental Sciences (33)
- Machine learning (31)
- Materials Science (31)
- Psychology (28)
- Chemical (27)
- Ecology (27)
- Analytical (26)
- General (26)
- Biological sciences (24)
- Mathematics (24)
- Computer Science (23)
- Additive Manufacturing (22)
- Agriculture (21)
- Geology (21)
- Optimization (21)
- Organic (21)
- History (20)
- Polymer (20)
- Environmental (19)
- Publication Year
- File Type
Articles 3151 - 3180 of 4085
Full-Text Articles in Entire DC Network
Modeling Core Generation And Transport Phenomena Of Microcapsules, Xiaoshuo Wu
Modeling Core Generation And Transport Phenomena Of Microcapsules, Xiaoshuo Wu
Doctoral Dissertations
Microcapsules play an important role in chemical, biomedical, and medical research. Of importance is their potential use as bio-sensors, as microreactors, and for drug delivery. In this dissertation, Computational Fluid Dynamics methodology is used to model the generation of droplets or cores (using alginate and oil) and to determine from the model process parameters needed for generating cores of homogeneous size for the manufacturing of microcapsules. Also, material diffusion through a microcapsule for controlled release is modeled based on finite difference methodology. The model was applied to experimental data on dextran release from microcapsules in order to estimate the diffusion …
Emotional Intelligence And Leadership Practices Among Human Service Program Managers, Cynthia Sims-Vanzant
Emotional Intelligence And Leadership Practices Among Human Service Program Managers, Cynthia Sims-Vanzant
Doctoral Dissertations
unavailable
Transformational Leadership Practices Of Deans And The Perceived Organizational Culture Of United Arab Emirates Public Universities : A Regression Analysis Study, Mouwafac Sidaoui
Transformational Leadership Practices Of Deans And The Perceived Organizational Culture Of United Arab Emirates Public Universities : A Regression Analysis Study, Mouwafac Sidaoui
Doctoral Dissertations
unavailable
The Quest For Tenure-Track Faculty Positions By Community College Adjunct Faculty, Leandra Powell Martin
The Quest For Tenure-Track Faculty Positions By Community College Adjunct Faculty, Leandra Powell Martin
Doctoral Dissertations
unavailable
Closing The Digital Divide : An Assessment Of Urban Graduate Teacher Education Students' Knowledge Of Information Literacy And Their Readiness To Integrate Information Literacy Into Their Teaching, Tyrone Heath Cannon
Doctoral Dissertations
unavailable
Fighting The Freeloader Effect : Cooperation, Attitude, And Achievement In A Jesuit Secondary Math Classroom, Kevin Quattrin
Fighting The Freeloader Effect : Cooperation, Attitude, And Achievement In A Jesuit Secondary Math Classroom, Kevin Quattrin
Doctoral Dissertations
unavailable
The Impact Of Participation In Collegiate Athletics On Women Athletes' Academic Experience At Select Jesuit Universities, Hillary D. Mckinney
The Impact Of Participation In Collegiate Athletics On Women Athletes' Academic Experience At Select Jesuit Universities, Hillary D. Mckinney
Doctoral Dissertations
unavailable
Touching The Spirit As A Motivating Factor For African American Students To Achieve Academic Excellence, E'Leva D.H. Gibson
Touching The Spirit As A Motivating Factor For African American Students To Achieve Academic Excellence, E'Leva D.H. Gibson
Doctoral Dissertations
unavailable
Nonlinear Optimization Approach For Upfc Power Flow Control And Voltage Security: Sufficient System Constraints For Optimality, Radha P. Kalyani
Nonlinear Optimization Approach For Upfc Power Flow Control And Voltage Security: Sufficient System Constraints For Optimality, Radha P. Kalyani
Doctoral Dissertations
"This dissertation provides a nonlinear optimization algorithm for the long term control of Unified Power Flow Controller (UPFC) to remove overloads and voltage violations by optimized control of power flows and voltages in the power network. It provides a control strategy for finding the long term control settings of one or more UPFCs by considering all the possible settings and all the (N-1) topologies of a power network. Also, a simple evolutionary algorithm (EA) has been proposed for the placement of more than one UPFC in large power systems"--Abstract, page iv.
Revisiting The Language-Music Relationship : Exploring Pitch Recognition And Discourse Intonation In Adult Esl Students, Katherine Gambs Knickerbocker
Revisiting The Language-Music Relationship : Exploring Pitch Recognition And Discourse Intonation In Adult Esl Students, Katherine Gambs Knickerbocker
Doctoral Dissertations
unavailable
Success Factors In Mergers And Acquisitions : Complexity Theory And Content Analysis Perspectives, Lena Petsa-Papanicolaou
Success Factors In Mergers And Acquisitions : Complexity Theory And Content Analysis Perspectives, Lena Petsa-Papanicolaou
Doctoral Dissertations
unavailable
The Relationship Between Out-Of-Class Activities And Cognitive Epistemological Development In College Freshmen As Mitigated By Student Demographic Variables, Leslie Dennen
Doctoral Dissertations
unavailable
Simple And Efficient Solutions To The Problems Associated With Acoustic Echo Cancellation, Asif Iqbal Mohammad
Simple And Efficient Solutions To The Problems Associated With Acoustic Echo Cancellation, Asif Iqbal Mohammad
Doctoral Dissertations
"This dissertation is a collection of papers that addresses several important problems associated with acoustic/line echo cancellation (AEC/LEC), specifically double-talk and echo-path change detection. A double-talk detector is used to freeze AEC filter's adaptation during periods of near-end speech. This dissertation presents three different novel double-talk detection schemes. Simulations demonstrate the efficiency of the proposed algorithms"--Abstract, page iii.
Indigenous Linguistically And Culturally Connected Community Health Educators/Promotoras : Preventing Hiv/Aids In The Latino Community, Alba Lucia Diaz-Cuellar
Indigenous Linguistically And Culturally Connected Community Health Educators/Promotoras : Preventing Hiv/Aids In The Latino Community, Alba Lucia Diaz-Cuellar
Doctoral Dissertations
unavailable
Pilot Program To Assess Seismic Hazards Of The Granite City, Monks Mound, And Columbia Bottom Quadrangles, St. Louis Metropolitan Area, Missouri And Illinois, Deniz Karadeniz
Doctoral Dissertations
"Three 1:24000 scale quadrangles were selected for a pilot program intended to evaluate seismic site response across the spectrum of geologic conditions underlying the St. Louis Metropolitan area, using the Granite City, Monks Mound and Columbia Bottom quadrangles. These evaluations included assessments of: i) site amplification distributions; ii) probabilistic hazard analysis of PGA, 0.2 second and 1.0 second spectral accelerations for 2%, 5% and 10% probability of exceedance in 50 years; iii) two scenario earthquakes and their associated PGA, 0.2 sec, and 1 sec spectral accelerations; and v) sensitivity and uncertainty analyses. These hazard maps were prepared using a fully-probabilistic …
An Indirect Loss Estimation Methodology To Account For Regional Earthquake Damage To Highway Bridges, Chakkaphan Tirasirichai
An Indirect Loss Estimation Methodology To Account For Regional Earthquake Damage To Highway Bridges, Chakkaphan Tirasirichai
Doctoral Dissertations
"This study proposes an integrated framework to estimate the indirect economic loss due to damaged bridges within the highway system from an earthquake event. The framework is designed to be general and convenient to apply to other study regions. In this dissertation, a simulated earthquake scenario centered in St. Louis Missouri with a magnitude 7.0 was used as a case study. The research results have clearly shown that the indirect losses are significant when compared to the direct loss. Policymakers can apply this study framework and the results as a guide and decision tool for developing an appropriate preventive action …
Hyphenated Hplc-Ms Technique For Analysis Of Compositional Monosaccharides Of Transgenic Corn Glycoprotein And Characterization Of Degradation Products Of Diazinon, Fonofos And Aldicarb In Various Oxidation Systems, Tongwen Wang
Doctoral Dissertations
"The studies of this dissertation are composed of two sections. The first one deals with the analysis of compositional monosaccharides of transgenic corn glycoproteins. The method used in this study involved derivatization of monosaccharides with two fluorophores followed by HPLC/fluorescence detection for quantitative studies, and by HPLC/SSI/MS for identification confirmation of individual monosaccharide...The second section investigates the degradation processes of several pesticides including diazinon, fonofos and aldicarb in various oxidation systems"--Abstract, page iv.
Architecting System Of Systems: Artificial Life Analysis Of Financial Market Behavior, Nil Hande Ergin
Architecting System Of Systems: Artificial Life Analysis Of Financial Market Behavior, Nil Hande Ergin
Doctoral Dissertations
"This research study focuses on developing a framework that can be utilized by system architects to understand the emergent behavior of system architectures. The objective is to design a framework that is modular and flexible in providing different ways of modeling sub-systems of System of Systems. At the same time, the framework should capture the adaptive behavior of the system since evolution is one of the key characteristics of System of Systems. Another objective is to design the framework so that humans can be incorporated into the analysis. The framework should help system architects understand the behavior as well as …
Innovative Solutions In Bridge Construction, Rehabilitation, And Structural Health Monitoring, Fabio Matta
Innovative Solutions In Bridge Construction, Rehabilitation, And Structural Health Monitoring, Fabio Matta
Doctoral Dissertations
"This dissertation includes three technical papers that investigate the development of innovative technologies for bridge construction, rehabilitation, and structural health monitoring, respectively, at different stages of the technology transfer process...The research impact is twofold: first is the introduction of promising innovative technologies in development and implementation projects with the direct involvement of forward-thinking industry partners; second is the demonstration of the validity of these technologies on the basis of a rigorous scientific approach"--Abstract, page iv.
Bga Footprints Modeling And Physics Based Via Models Validation For Power And Signal Integrity Applications, Giuseppe Selli
Bga Footprints Modeling And Physics Based Via Models Validation For Power And Signal Integrity Applications, Giuseppe Selli
Doctoral Dissertations
"Modeling and simulating the multi-scale nature of a power distribution network (PDN) is essential to ensure the correct functioning of the devices connected to it. Simple parallel-plate sections constitute the core of these PDN geometries, together with sections where a large number of holes and vias are present, as in the case of a BGA footprint. Employing a divide-and-conquer approach allows for the modeling of these geometries separately, i.e., 3-D full wave solvers for the sections with holes and vias, and a cavity model approach, for the simple parallel-plate structures. Also, equivalent circuit models can be obtained for time-domain and …
Impacts Of Acid Mine Drainage On Carbon Cycling In Receiving Streams, Ernest W. Fonyuy
Impacts Of Acid Mine Drainage On Carbon Cycling In Receiving Streams, Ernest W. Fonyuy
Doctoral Dissertations
"Field and laboratory investigations of acid mine drainage (AMD) contaminated and uncontaminated waters were conducted in order to determine and model processes and reaction mechanisms that control dissolved inorganic carbon (DIC) transformation and shifts in isotope ratio of DIC (Δ¹³CDIC). The results show that AMD caused variable pH changes, overall decreases in Fe²⁺, alkalinity, and DIC, and increases in (Δ¹³CDIC) in receiving streams. AMD caused more than 50 to > 98% seasonal DIC loss in stream water through CO₂ degassing. High DIC losses corresponded to high Fe²⁺ and lower or no HCO₃⁻ in the water samples, because …
Advanced Controller Design Using Neural Networks For Nonlinear Dynamic Systems With Application To Micro/Nano Robotics, Qinmin Yang
Doctoral Dissertations
"The dissertation focuses on neural network (NN) control designs for nonlinear systems with application to micro/nano robotic. Critical problems in nano scale including thermal drift are also addressed"--Abstract, page iv.
Development Of A Geographic Information System-Based Virtual Geotechnical Database And Assessment Of Liquefaction Potential For The St. Louis Metropolitan Area, Jae-Won Chung
Doctoral Dissertations
"The St. Louis Metropolitan area is the focus the U.S. Geological Survey's Earthquake Hazard Program's plan for assessing and reducing the likely risks of an earthquake likely emanating from New Madrid Seismic Zone (NMSZ), which is the most active seismic zone in the Midwestern United States. The St. Louis Metropolitan area consists of three counties in Missouri and four in Illinois, which are divided by the state boundary along the Mississippi River. Both of the state's respective geological surveys have produced their own geologic maps and datasets, employing dissimilar geodata information and systems, with differing map units, map scales, and …
The Development And Application Of A Systematic Approach To Evaluating An Academic Department's Brand Meaning, Cassandra C. Elrod
The Development And Application Of A Systematic Approach To Evaluating An Academic Department's Brand Meaning, Cassandra C. Elrod
Doctoral Dissertations
"Research of existing literature indicates that below the university level, there has been little effort made in branding academia, namely academic departments. The lack of branding may significantly affect the perceptions that potential students and future employers of these students have about one of these academic units. The impact may be most significant for units where the fields of study that are represented by the department may be unclear, such as in the case of engineering management. However, even in the cases of better-understood fields of study, for example, electrical engineering, the competition for students with other fields of study …
An Investigation Of Lead And Other Metal Contaminants In The Sediments Of Clearwater Lake, Missouri, Gary W. Krizanich
An Investigation Of Lead And Other Metal Contaminants In The Sediments Of Clearwater Lake, Missouri, Gary W. Krizanich
Doctoral Dissertations
"The purpose of this investigation is to characterize the spatial and temporal distribution and concentration of trace metals in sediments of Clearwater Lake. Understanding how trace metals are released to and transported in aquatic environments is important to the overall understanding of the impacts of mining on the natural environment. The main focus of this research will be on historic sedimentation within Clearwater Lake, which may act as a sink where mining related trace metals are stored. Because of their high preservation rates in basins, sediments can provide detailed chronostratigraphic histories of trace metal inputs in lakes. Sediment records can …
Modeling Network Traffic On A Global Network-Centric System With Artificial Neural Networks, Douglas K. Swift
Modeling Network Traffic On A Global Network-Centric System With Artificial Neural Networks, Douglas K. Swift
Doctoral Dissertations
"This dissertation proposes a new methodology for modeling and predicting network traffic. It features an adaptive architecture based on artificial neural networks and is especially suited for large-scale, global, network-centric systems. Accurate characterization and prediction of network traffic is essential for network resource sizing and real-time network traffic management. As networks continue to increase in size and complexity, the task has become increasingly difficult and current methodology is not sufficiently adaptable or scaleable. Current methods model network traffic with express mathematical equations which are not easily maintained or adjusted. The accuracy of these models is based on detailed characterization of …
Enzymatic Synthesis And Characterization Of Oligopeptides, Co-Oligopeptides And Hydroxy Acid Capped Polypeptides In Mixed Aqueous Organic Media, Santhana Srinivasan
Enzymatic Synthesis And Characterization Of Oligopeptides, Co-Oligopeptides And Hydroxy Acid Capped Polypeptides In Mixed Aqueous Organic Media, Santhana Srinivasan
Doctoral Dissertations
"Proteolytic enzymes have been used for the synthesis of homo-oligomers and hydroxy acid capped peptides with amino acids and hydroxy acid esters as substrates in aqueous and aqueous organic biphasic and triphasic systems. However, successful incorporation of hydroxy acids in oligopeptide substrates has not been demonstrated. Use of monophasic media comprising of acetonitrile/water in which oligopeptide substrates were soluble was examined for the synthesis of oligomers of neutral and polar amino acids like Met, Tyr, Lys, Gly, Asp and Glu and tailored co-oligomers of Lys-Met and Arg-Met. Effect of reaction parameters such as starting substrate concentration, system composition, reaction time, …
Experimental And Analytical Evaluation Of Frp-Confined Large Size Reinforced Concrete Columns, Silvia Rocca
Experimental And Analytical Evaluation Of Frp-Confined Large Size Reinforced Concrete Columns, Silvia Rocca
Doctoral Dissertations
"Fiber Reinforced Polymer (FRP) jacketing of Reinforced Concrete (RC) columns, as a rapidly growing strengthening technique, requires appropriate design methods. However, the current available design guides are based on models, in their majority semi-empirical, and calibrated with small-scale plain concrete specimens. These models might not be reliable in predicting the strength and ductility enhancement sought through FRP-confinement in RC columns with geometric and material properties as found in practice. This dissertation presents the research conducted in three technical papers. In the first paper, the performance of 22 FRP-wrapped RC columns of medium- and large-scale is studied. The results of the …
Mobile Array Designs With Anserlin Antennas And Efficient, Wide-Band Peec Models For Interconnect And Power Distribution Network Analysis, Michael A. Cracraft
Mobile Array Designs With Anserlin Antennas And Efficient, Wide-Band Peec Models For Interconnect And Power Distribution Network Analysis, Michael A. Cracraft
Doctoral Dissertations
"A mobile, wide-band antenna system has been developed around the ANSERLIN antenna element and a 3-dB splitter design. The size of the antenna elements was reduced over previous versions by introducing dielectric substrates. Additionally, new variations of the antenna were designed to influence radiation characteristics. To further reduce the number of components in the array, a very low profile splitter was designed and mounted below one of the antenna elements, doubling as the return plane for the antenna. The partial-element equivalent circuit (PEEC) method has been used for 3D interconnect analysis and numerous other applications. Being based on the same …
Detection Algorithms For Spatial Data, Spandan Tiwari
Detection Algorithms For Spatial Data, Spandan Tiwari
Doctoral Dissertations
"This dissertation addresses the problem of anomaly detection in spatial data. The problem of landmine detection in airborne spatial data is chosen as the specific detection scenario. The first part of the dissertation deals with the development of a fast algorithm for kernel-based non-linear anomaly detection in the airborne spatial data. The original Kernel RX algorithm, proposed by Kwon et al. [2005a], suffers from the problem of high computational complexity, and has seen limited application. With the aim to reduce the computational complexity, a reformulated version of the Kernel RX, termed the Spatially Weighted Kernel RX (SW-KRX), is presented. It …