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Articles 4921 - 4950 of 21795
Full-Text Articles in Engineering
Half-Mode Cavity-Based Planar Filtering Antenna With Controllable Transmission Zeroes, Kirti Dhwaj, Joshua M. Kovitz, Haozhan Tian, Li (Lijun) Jun Jiang, Tatsuo Itoh
Half-Mode Cavity-Based Planar Filtering Antenna With Controllable Transmission Zeroes, Kirti Dhwaj, Joshua M. Kovitz, Haozhan Tian, Li (Lijun) Jun Jiang, Tatsuo Itoh
Electrical and Computer Engineering Faculty Research & Creative Works
Atwo-pole half-mode substrate integrated waveguide (HMSIW) cavity-based filtering antenna is presented. The HMSIW cavity is used as a radiating resonator with a conventional substrate integrated waveguide (SIW) cavity functioning as a high- Q resonator of the filter, leading to its compact size. The concept of source-load coupling is introduced for filtering antennas, which allows for the presence of two controllable transmission zeroes (TZs) in the frequency response of proposed design. This is accomplished by using electric coupling between two resonator cavities and a combination of microstrip/coaxial line to feed the antenna. The single-layer printed circuit board structure provides a broadside …
Analytical Evaluation Of Partial Elements Using A Retarded Taylor Series Expansion Of The Green's Function, Luigi Lombardi, Giulio Antonini, Albert E. Ruehli
Analytical Evaluation Of Partial Elements Using A Retarded Taylor Series Expansion Of The Green's Function, Luigi Lombardi, Giulio Antonini, Albert E. Ruehli
Electrical and Computer Engineering Faculty Research & Creative Works
The computation of the fundamental magnetic and electric field coupling terms for the full-wave partial element equivalent circuit method is time consuming for large problems. Extensive numerical integration is required for the computation of four-to-six-fold integration of the partial element coefficients. In this paper, we present new full-wave analytical formulas for their computation, which are based on several different Taylor series expansion approaches for the case of rectangular elementary volumes and surfaces.
Biodegradation Of Phenolic Components In Wastewater By Micro Algae: A Review, Muthanna H. Al-Dahhan, Faris Hammoodi Al-Ani, Adaf Jadaan Obaied Al-Saned
Biodegradation Of Phenolic Components In Wastewater By Micro Algae: A Review, Muthanna H. Al-Dahhan, Faris Hammoodi Al-Ani, Adaf Jadaan Obaied Al-Saned
Chemical and Biochemical Engineering Faculty Research & Creative Works
The biodegradation of phenolic contaminant present in wastewater by micro algae has been investigated in the current research. The study focused on algae growth requirements and factors affecting algae growth in contaminated water leading to the best treatment. Different techniques used to functionalize microalgae in the treatment such as batch and continuous operation modes have been further investigated. Mechanisms for microalgae pollutants degradation and microalgae growth kinetics were also highlighted to present the required knowledge in phenol contaminant biodegradation field by microorganisms.
Comparison Between Cold/Hot Smart Water Flooding In Sandstone Reservoirs, Hasan N. Al-Saedi, Ariel Williams, Ralph E. Flori
Comparison Between Cold/Hot Smart Water Flooding In Sandstone Reservoirs, Hasan N. Al-Saedi, Ariel Williams, Ralph E. Flori
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
The incremental oil recovery has been investigated and approved by many laboratory and field projects using water flooding in tertiary stage. The salinity of the injected water is an important factor observed by many researchers. The more salinity decreases the more oil recovery obtained. The investigations on the hot low salinity water flooding have been conducted by many researchers and they found out that it is useful for increasing oil recovery especially heavy oil due to reducing oil viscosity and make it easy to produce to the surface. The thermal expansion of water plays an important role in the incremental …
Corrosion Resistance Of Pipeline Steel With Damaged Enamel Coating And Cathodic Protection, Liang Fan, Signo Tadeu Dos Reis, Genda Chen, Michael L. Koenigstein
Corrosion Resistance Of Pipeline Steel With Damaged Enamel Coating And Cathodic Protection, Liang Fan, Signo Tadeu Dos Reis, Genda Chen, Michael L. Koenigstein
Materials Science and Engineering Faculty Research & Creative Works
This paper presents the first report on the corrosion resistance of pipeline steel with damaged enamel coating and cathodic protection in 3.5 wt % NaCl solution. In particular, dual cells are set up to separate the solution in contact with the damaged and intact enamel coating areas, to produce a local corrosion resistance measurement for the first time. Enamel-coated steel samples, with two levels of cathodic protection, are tested to investigate their impedance by electrochemical impedance spectroscopy (EIS) and their cathodic current demand by a potentiostatic test. Due to its glass transition temperature, the enamel-coated pipeline can be operated on …
Elucidating The Effect Of Water-To-Cement Ratio On The Hydration Mechanisms Of Cement, Aida Margarita Ley-Hernandez, Jonathan Lapeyre, Rachel Cook, Aditya Kumar, Dimitri Feys
Elucidating The Effect Of Water-To-Cement Ratio On The Hydration Mechanisms Of Cement, Aida Margarita Ley-Hernandez, Jonathan Lapeyre, Rachel Cook, Aditya Kumar, Dimitri Feys
Materials Science and Engineering Faculty Research & Creative Works
The hydration of cement is often modeled as a phase boundary nucleation and growth (pBNG) process. Classical pBNG models, based on the use of isotropic and constant growth rate of the main hydrate, that is, calcium-silicate-hydrate (C-S-H), are unable to explain the lack of any significant effect of the water-to-cement (w/c) ratio on the hydration kinetics of cement. This paper presents a modified form of the pBNG model, in which the anisotropic growth of C-S-H is allowed to vary in relation to the nonlinear evolution of its supersaturation in solution. Results show that once the supercritical C-S-H nuclei form, their …
Program Progress Performance Report #2, Missouri University Of Science And Technology. Inspire - University Transportation Center
Program Progress Performance Report #2, Missouri University Of Science And Technology. Inspire - University Transportation Center
Semi-Annual Progress Reports
No abstract provided.
Model-Assisted Probability Of Detection Of Flaws In Aluminum Blocks Using Polynomial Chaos Expansions, Xiaosong Du, Leifur Leifsson, Robert Grandin, William Meeker, Ronald Roberts, Jiming Song
Model-Assisted Probability Of Detection Of Flaws In Aluminum Blocks Using Polynomial Chaos Expansions, Xiaosong Du, Leifur Leifsson, Robert Grandin, William Meeker, Ronald Roberts, Jiming Song
Mechanical and Aerospace Engineering Faculty Research & Creative Works
Probability of detection (POD) is widely used for measuring reliability of nondestructive testing (NDT) systems. Typically, POD is determined experimentally, while it can be enhanced by utilizing physics-based computational models in combination with model-assisted POD (MAPOD) methods. With the development of advanced physics-based methods, such as ultrasonic NDT testing, the empirical information, needed for POD methods, can be reduced. However, performing accurate numerical simulations can be prohibitively time-consuming, especially as part of stochastic analysis. In this work, stochastic surrogate models for computational physics-based measurement simulations are developed for cost savings of MAPOD methods while simultaneously ensuring sufficient accuracy. The stochastic …
Spectral Analysis Of Surface Waves To Detect Subsurface Voids, Payman Hajiani, Neil Lennart Anderson, J. David Rogers
Spectral Analysis Of Surface Waves To Detect Subsurface Voids, Payman Hajiani, Neil Lennart Anderson, J. David Rogers
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
Systems and methods for detecting a subsurface cavity. A source applies a force to ground under inspection and a plurality of sensors coupled to the ground detect resulting surface waves. A processor is configured to extract phase and frequency components of the acquired seismic data, identify a phase shift in surface waves in the ground under inspection based on the extracted phase and frequency components, and determine one or more physical characteristics of a subsurface cavity based on the identified phase shift
Efficiency Of Solid Inclusion Removal From The Steel Melt By Ceramic Foam Filter: Design And Experimental Validation, Soumava Chakraborty, Ronald J. O'Malley, Laura Bartlett, Mingzhi Xu
Efficiency Of Solid Inclusion Removal From The Steel Melt By Ceramic Foam Filter: Design And Experimental Validation, Soumava Chakraborty, Ronald J. O'Malley, Laura Bartlett, Mingzhi Xu
Materials Science and Engineering Faculty Research & Creative Works
An investigation was performed to measure the efficiency of solid alumina inclusion removal by filtration during casting. A mold design was developed using modeling software to produce two castings that fill simultaneously, one with a filter and the other without a filter. The design avoided vortex formation and thus air entrainment, which helped to avoid reoxidation inside the mold cavity. Samples from these castings were analyzed utilizing an SEM/EDS system with automated feature analysis (AFA) to measure the efficiency of inclusion removal using a 20 ppi zirconia foam filter. This study also documents the occurrence of inclusion flotation and agglomeration …
Test Standard For Determining The Rotational-Lateral Stiffness Of Beam-To-Panel Assemblies, 2017 Edition, American Iron And Steel Institute
Test Standard For Determining The Rotational-Lateral Stiffness Of Beam-To-Panel Assemblies, 2017 Edition, American Iron And Steel Institute
American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)
No abstract provided.
Test Standard For Determining The Effective Area Of Cold-Formed Steel Compression Members, 2017 Edition, American Iron And Steel Institute
Test Standard For Determining The Effective Area Of Cold-Formed Steel Compression Members, 2017 Edition, American Iron And Steel Institute
American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)
No abstract provided.
North American Standard For Cold-Formed Steel Framing -- Product Data, 2017 Edition, American Iron And Steel Institute
North American Standard For Cold-Formed Steel Framing -- Product Data, 2017 Edition, American Iron And Steel Institute
American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)
No abstract provided.
Test Standard For Determining The Strength And Deformation Characteristics Of Cold-Formed Steel Connections, 2017 Edition, American Iron And Steel Institute
Test Standard For Determining The Strength And Deformation Characteristics Of Cold-Formed Steel Connections, 2017 Edition, American Iron And Steel Institute
American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)
No abstract provided.
Test Standard For Determining The Flexural Strength Reduction Factor Of Purlins Supporting A Standing Seam Roof System, 2017 Edition, American Iron And Steel Institute
Test Standard For Determining The Flexural Strength Reduction Factor Of Purlins Supporting A Standing Seam Roof System, 2017 Edition, American Iron And Steel Institute
American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)
No abstract provided.
Test Standard For Determining The Strength Of A Roof Panel-To-Purlin-To-Anchorage Device Connection, 2017 Edition, American Iron And Steel Institute
Test Standard For Determining The Strength Of A Roof Panel-To-Purlin-To-Anchorage Device Connection, 2017 Edition, American Iron And Steel Institute
American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)
No abstract provided.
Test Standard For Determining The Web Crippling Strength Of Cold-Formed Steel Flexural Members, 2017 Edition, American Iron And Steel Institute
Test Standard For Determining The Web Crippling Strength Of Cold-Formed Steel Flexural Members, 2017 Edition, American Iron And Steel Institute
American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)
No abstract provided.
Test Standard For Determining The Distortional Buckling Strength Of Cold-Formed Steel Hat-Shaped Compression Members, 2017 Edition, American Iron And Steel Institute
Test Standard For Determining The Distortional Buckling Strength Of Cold-Formed Steel Hat-Shaped Compression Members, 2017 Edition, American Iron And Steel Institute
American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)
No abstract provided.
Test Standard For Determining The Strength And Deformation Behavior Of Joist Connectors Attached To Cold-Formed Steel Structural Framing, 2017 Edition, American Iron And Steel Institute
Test Standard For Determining The Strength And Deformation Behavior Of Joist Connectors Attached To Cold-Formed Steel Structural Framing, 2017 Edition, American Iron And Steel Institute
American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)
No abstract provided.
Test Standard For Determining The Strength And Deformation Behavior Of Hold-Downs Attached To Cold-Formed Steel Structural Framing, 2017 Edition, American Iron And Steel Institute
Test Standard For Determining The Strength And Deformation Behavior Of Hold-Downs Attached To Cold-Formed Steel Structural Framing, 2017 Edition, American Iron And Steel Institute
American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)
No abstract provided.
Test Standard For Determining The Load-Carrying Strength Of Panels And Anchor-To-Panel Attachments For Roof Or Siding Systems Tested In Accordance With Astm E1592, 2017 Edition, American Iron And Steel Institute
Test Standard For Determining The Load-Carrying Strength Of Panels And Anchor-To-Panel Attachments For Roof Or Siding Systems Tested In Accordance With Astm E1592, 2017 Edition, American Iron And Steel Institute
American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)
No abstract provided.
Test Standard For Determining The Flexural Strength Of Cold-Formed Steel Hat-Shaped Members, 2017 Edition, American Iron And Steel Institute
Test Standard For Determining The Flexural Strength Of Cold-Formed Steel Hat-Shaped Members, 2017 Edition, American Iron And Steel Institute
American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)
No abstract provided.
Test Standard For Determining The Strength And Stiffness Of Cold-Formed Steel Diaphragms By The Cantilever Test Method, 2017 Edition, American Iron And Steel Institute
Test Standard For Determining The Strength And Stiffness Of Cold-Formed Steel Diaphragms By The Cantilever Test Method, 2017 Edition, American Iron And Steel Institute
American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)
No abstract provided.
Test Standard For Determining The Uniform And Local Ductility Of Carbon And Low-Alloy Steels, 2017 Edition, American Iron And Steel Institute
Test Standard For Determining The Uniform And Local Ductility Of Carbon And Low-Alloy Steels, 2017 Edition, American Iron And Steel Institute
American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)
No abstract provided.
Test Standard For Determining The Tensile And Shear Strengths Of Steel Screws, 2017 Edition, American Iron And Steel Institute
Test Standard For Determining The Tensile And Shear Strengths Of Steel Screws, 2017 Edition, American Iron And Steel Institute
American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)
No abstract provided.
A Straightforward Updating Criterion For 2-D/3-D Hybrid Discontinuous Galerkin Time-Domain Method Controlling Comparative Error, Wending Mai, Ping Li, C. G. Li, Ming Jiang, Wenqu Hao, Lijun Jiang, Jun Hu
A Straightforward Updating Criterion For 2-D/3-D Hybrid Discontinuous Galerkin Time-Domain Method Controlling Comparative Error, Wending Mai, Ping Li, C. G. Li, Ming Jiang, Wenqu Hao, Lijun Jiang, Jun Hu
Electrical and Computer Engineering Faculty Research & Creative Works
The 2-D/3-D hybrid discontinuous Galerkin time-domain (DGTD) method is efficient to deal with structures that contain elements capable of 2-D simplification. To separate 2-D elements from 3-D ones, a criterion for approximation error manipulation is required. However, in the latest reported technique, this kind of criterion is derived from the causality principle and the Courant-Freidrichs-Lewy constraint, and thus is indirect and inessential to 2-D simplification. As a result, some elements capable of 2-D simplification are unnecessarily flagged as 3-D ones, deteriorating efficiency dramatically. Moreover, controlling absolute error, the traditional criterion is not flexible for structures with complex mode distribution. In …
Study On The Effect Of Iron-Based Deoxidizing Inhibitors For Coal Spontaneous Combustion Prevention, Chaoyu Hao, Yanling Chen, Jiren Wang, Cunbao Deng, Guang Xu, Fengwei Dai, Rui Si, Hongfei Wang, Haoyu Wang
Study On The Effect Of Iron-Based Deoxidizing Inhibitors For Coal Spontaneous Combustion Prevention, Chaoyu Hao, Yanling Chen, Jiren Wang, Cunbao Deng, Guang Xu, Fengwei Dai, Rui Si, Hongfei Wang, Haoyu Wang
Mining Engineering Faculty Research & Creative Works
To improve the prevention of spontaneous coal combustion, reduced iron powder and other ingredients should be added together to form an iron-based deoxidizing inhibitor, with the dual effect of oxygen consumption and inhibition. The oxygen consumption rate of the inhibitor was studied through experiments. According to the theory of coordination resistance, the coordination resistance of Fe3+ was studied via the density functional method. Subsequently, a comparative experiment of the effects on spontaneous coal combustion was conducted. The research shows that several kinds of common resistance agents that are added to the reduced iron powder can consume oxygen. However, the …
Review Of The Methods For Determination Of Reactive Oxygen Species And Suggestion For Their Application In Advanced Oxidation Induced By Dielectric Barrier Discharges, Emile S. Massima Mouele, Olanrewaju Ojo Fatoba, Omotola Babajide, Kassim O. Badmus, Leslie F. Petrik
Review Of The Methods For Determination Of Reactive Oxygen Species And Suggestion For Their Application In Advanced Oxidation Induced By Dielectric Barrier Discharges, Emile S. Massima Mouele, Olanrewaju Ojo Fatoba, Omotola Babajide, Kassim O. Badmus, Leslie F. Petrik
Mining Engineering Faculty Research & Creative Works
Advanced oxidation processes (AOPs) particularly non-thermal plasmas based on electrical discharges have been widely investigated for water and wastewater treatment. Dielectric barrier discharges (DBDs) generate large amounts of selective and non-selective reactive oxygen species (ROS) such as ozone, hydrogen peroxide, atomic oxygen, superoxide molecular anions and hydroxyl radicals, having been proved to be efficient for water decontamination among various forms of electrical discharge systems. The detection and quantification methods of these oxygen species in non-thermal plasmas have been reviewed. However, their application in dielectric barrier discharge has not been well studied. It is therefore imperative to summarize the various detection …
Development Of A Novel Bioactive Glass Suitable For Osteosarcoma-Related Bone Grafts, Alireza Rahimnejad Yazdi, Lawrence Torkan, Stephen D. Waldman, Mark R. Towler
Development Of A Novel Bioactive Glass Suitable For Osteosarcoma-Related Bone Grafts, Alireza Rahimnejad Yazdi, Lawrence Torkan, Stephen D. Waldman, Mark R. Towler
Chemical and Biochemical Engineering Faculty Research & Creative Works
In this study, zinc borate-based glasses with increasing gallium content (0, 2.5, 5, 10, and 15 wt % Ga) were synthesized and their effect on the viability and proliferation of preosteoblasts and osteosarcoma cancer cells were investigated. Methyl thiazolyl tetrazolium (MTT) cell viability assays using glass degradation extracts revealed that the extracts from glasses with lower Ga contents could enhance the viability of preosteoblasts, while extracts from the glass composition with 15 wt % Ga caused statistically significant reduction of their viability. MTT cell viability assays using the extracts and osteosarcoma cells showed that only extracts from the glass composition …
The Effect Of Incorporating Different Concentrations Of Chlorhexidine Digluconate On The Degree Of Conversion Of An Experimental Adhesive Resin, Lamiaa Mahmoud Moharam, Haidy Nabil Salem, Hanaa Mahmoud Elgamily
The Effect Of Incorporating Different Concentrations Of Chlorhexidine Digluconate On The Degree Of Conversion Of An Experimental Adhesive Resin, Lamiaa Mahmoud Moharam, Haidy Nabil Salem, Hanaa Mahmoud Elgamily
Chemical and Biochemical Engineering Faculty Research & Creative Works
Background: The aim of this study was to evaluate the effect of chlorhexidine digluconate incorporation on the degree of conversion of an experimental adhesive resin. Material and methods: The experimental resin was prepared from 70 wt.% bisphenol A glycerolate dimethacrylate, 30 wt.% hydroxyethyl methacrylate, silanized SiO2 nanofillers, 0.5% of camphorquinone and ethyl 4-dimethylaminebenzoate (binary photo-initiator system). Five chlorhexidine digluconate concentrations (0, 0.5, 1, 2 and 4 wt%) were then incorporated into the experimental resin. Thirty Potassium Bromide pellets were prepared then divided into six groups (n=5/group), representing the tested adhesive resins (Single Bond 2, 0, 0.5, 1, 2 and …