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Articles 100231 - 100260 of 198032

Full-Text Articles in Engineering

An Investigation Of Inital Shock Cell Formation In Turbulent Coanda Wall Jets, Caroline P. Lubert, Christian R. Schwantes, Richard J. Shafer Jan 2016

An Investigation Of Inital Shock Cell Formation In Turbulent Coanda Wall Jets, Caroline P. Lubert, Christian R. Schwantes, Richard J. Shafer

Department of Mathematics and Statistics - Faculty Scholarship

Turbulent Coanda wall jets are present in a multitude of natural and man-made applications. Their obvious advantages in terms of flow deflection are often outweighed by disadvantages related to the increased noise levels associated with these jets. Primary high-frequency noise sources are turbulent mixing noise (TMN) and shock-associated noise (SAN). Clearly, accurate modeling of these noise sources will facilitate better predictions of the behavior of such jet noise with physical characteristics. This paper, which focuses on SAN, shows how the Method of Characteristics can be applied to a steady two-dimensional axisymmetric supersonic flow to rewrite the three governing partial differential …

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Evolution Of Moiré Profiles From Van Der Waals Superstructures Of Boron Nitride Nanosheets, Yunlong Liao, Wei Cao, John W. Connell, Zhongfang Chen, Yi Lin Jan 2016

Evolution Of Moiré Profiles From Van Der Waals Superstructures Of Boron Nitride Nanosheets, Yunlong Liao, Wei Cao, John W. Connell, Zhongfang Chen, Yi Lin

Applied Research Center Publications

Two-dimensional (2D) van der Waals (vdW) superstructures, or vdW solids, are formed by the precise restacking of 2D nanosheet lattices, which can lead to unique physical and electronic properties that are not available in the parent nanosheets. Moiré patterns formed by the crystalline mismatch between adjacent nanosheets are the most direct features for vdW superstructures under microscopic imaging. In this article, transmission electron microscopy (TEM) observation of hexagonal Moiré patterns with unusually large micrometer-sized lateral areas (up to similar to 1μm2 and periodicities (up to similar to 50 nm) from restacking of liquid exfoliated hexagonal boron nitride nanosheets (BNNSs) …

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A New Technique To Improve The Operation Of Prosthetic Limbs During Muscle Fatigue, H. Albunashee, G. Rasool, K. Iqbal, G. White Jan 2016

A New Technique To Improve The Operation Of Prosthetic Limbs During Muscle Fatigue, H. Albunashee, G. Rasool, K. Iqbal, G. White

Journal of the Arkansas Academy of Science

Prosthetic limbs hold a promise to renew the quality of life for the amputee. Neural commands are decoded via a classifier to generate control signals for the prosthetic devices. In the literature, many challenges and limitations have been identified that affect the prosthesis operation. One such drawback is muscle fatigue which degrades the surface electromyogram (sEMG) signals, and consequently, the performance of the deployed classification algorithm declines from 90% to 50% of average accuracy. We used a new technique using the Linear Discrimination Analysis (LDA) algorithm and the muscle synergy-based task discrimination (MSD) algorithm to improve the classification accuracy. In …

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Radio-Frequency Plasma Polymerized Biodegradable Carrier For In Vivo Release Of Cis-Platinum, Sudhir Bhatt, Fatemeh Valamanesh, Jerome Pulpytel, Rea Lo Dico, Aliby Baiyukha, Iman Al-Dybiat, Marc Pocard, Farzaneh Arefi-Khonsari, Massoud Mirshahi Jan 2016

Radio-Frequency Plasma Polymerized Biodegradable Carrier For In Vivo Release Of Cis-Platinum, Sudhir Bhatt, Fatemeh Valamanesh, Jerome Pulpytel, Rea Lo Dico, Aliby Baiyukha, Iman Al-Dybiat, Marc Pocard, Farzaneh Arefi-Khonsari, Massoud Mirshahi

Bioelectrics Publications

A low pressure plasma process based on plasma deposition has been used to develop a drug delivery strategy. In this study, a drug delivery system based on different layers of plasma co-polymerized Poly ε-caprolactone-Polyethylene glycol (PCL-PEG) co-polymers was deposited on biocompatible substrates. Cis-platinum (118 μgm/cm2) was used as an anti-cancer drug and incorporated for local delivery of the chemotherapeutic agent. The co-polymer layers and their interaction with cancer cells were analyzed by scanning electron microscopy. Our study showed that the plasma-PCL-PEG coated cellophane membranes, in which the drug, was included did not modify the flexibility and appearance of …

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Parametric Investigations Into Internal Surface Modification Of Brass Tubes With Alternating Magnetic Field, Harish Kumar, Sehijpal Singh, Anil K. Srivastava Jan 2016

Parametric Investigations Into Internal Surface Modification Of Brass Tubes With Alternating Magnetic Field, Harish Kumar, Sehijpal Singh, Anil K. Srivastava

Manufacturing & Industrial Engineering Faculty Publications

The final finish operations have great significance in an overall manufacturing cycle of a product. The surface finishing and modification of surfaces have been the vital requirements of most of the products. The processes like shot peening, shot blasting, abrasive finishing and super finishing are being largely employed for such requirements. While final finishing of flat and outside surfaces are relatively easy and well established, the internal surfaces such as those of pipes is not so simple. In this paper, the application of low frequency alternative magnetic field has been explored for imparting surface modification including surface on the internal …

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Pumping Of Fresh Concrete: Insights And Challenges, Geert De Schutter, Dimitri Feys Jan 2016

Pumping Of Fresh Concrete: Insights And Challenges, Geert De Schutter, Dimitri Feys

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Pumping of Fresh Concrete is of Utmost Importance for Concrete Practice. Required Pumping Pressures Are Typically Estimated based on Design Charts. However, with the Increased Use of Chemical Admixtures and the Development of More Flowable Concrete Mixtures, the Accuracy of Traditional Design Charts is Questioned. in Recent Years, Significant Progress Has Been Obtained in Understanding the Flow of the Material in the Pumping Pipe, Including the Behavior of the Lubrication Layer Near the Pipe Surface. in Comparison with Traditional Design Charts, This Results in More Reliable Pressure Predictions When Considering Very Fluid Concrete Types Like Self-Consolidating Concrete. Some Remaining Challenges …

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System Frequency Support Of Permanent Magnet Synchronous Generator-Based Wind Power Plant, Ziping Wu Jan 2016

System Frequency Support Of Permanent Magnet Synchronous Generator-Based Wind Power Plant, Ziping Wu

Electronic Theses and Dissertations

With ever-increasing penetration of wind power into modern electric grids all over the world, a trending replacement of conventional synchronous generators by large wind power plants will likely result in the poor overall frequency regulation performance. On the other hand, permanent magnet synchronous generator wind Turbine System (PMSG-WTG) with full power back to back converters tends to become one of the most promising wind turbine technologies thanks to various advantages. It possesses a significant amount of kinetic energy stored in the rotating mass of turbine blades, which can be utilized to enhance the total inertia of power system. Additionally, the …

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Implementation Of An Air Supply Unit Control Scheme For The Uc2av (Unmanned Circulation Control Aerial Vehicle), Cameron Rosen Jan 2016

Implementation Of An Air Supply Unit Control Scheme For The Uc2av (Unmanned Circulation Control Aerial Vehicle), Cameron Rosen

Electronic Theses and Dissertations

The expanded prevalence of Unmanned Aerial Vehicles (UAVs) in recent years has created many opportunities to research novel applications for their use, enabled by the reduced cost, mission flexibility, and reduced risk that small-scale unmanned platforms provide in comparison to larger aircraft. Despite the versatility of unmanned aviation, limitations on payload size and weight, fuel and power capacity, and takeoff and landing infrastructure can restrict UAV applications, and have created a need for lift augmenting technologies that can reduce the impact of these limitations. Circulation Control (CC) is an active flow technique that has been proven as a method for …

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Proceedings Of The 16th Annual Early Career Technical Conference (Front Matter), Ectc Coordinating Committee Jan 2016

Proceedings Of The 16th Annual Early Career Technical Conference (Front Matter), Ectc Coordinating Committee

Early Career Technical Journal (ECTJ)

Proceedings of the 16th Annual Early Career Technical Conference, November 5, 2016. School of Engineering, University of Alabama at Birmingham, Birmingham, Alabama; pp. i-xi

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Section 1: Bio-Medical/Bioengineering, Ectc Coordinating Committee Jan 2016

Section 1: Bio-Medical/Bioengineering, Ectc Coordinating Committee

Early Career Technical Journal (ECTJ)

Proceedings of the 16th Annual Early Career Technical Conference, November 5, 2016. School of Engineering, University of Alabama at Birmingham, Birmingham, Alabama; pp. 1-30

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Section 3: Materials, Ectc Coordinating Committee Jan 2016

Section 3: Materials, Ectc Coordinating Committee

Early Career Technical Journal (ECTJ)

Proceedings of the 16th Annual Early Career Technical Conference, November 5, 2016. School of Engineering, University of Alabama at Birmingham, Birmingham, Alabama; pp. 63-94

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Section 2: Design & Manufacturing, Ectc Coordinating Committee Jan 2016

Section 2: Design & Manufacturing, Ectc Coordinating Committee

Early Career Technical Journal (ECTJ)

Proceedings of the 16th Annual Early Career Technical Conference, November 5, 2016. School of Engineering, University of Alabama at Birmingham, Birmingham, Alabama; pp. 31-62

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Section 4: Materials, Ectc Coordinating Committee Jan 2016

Section 4: Materials, Ectc Coordinating Committee

Early Career Technical Journal (ECTJ)

Proceedings of the 16th Annual Early Career Technical Conference, November 5, 2016. School of Engineering, University of Alabama at Birmingham, Birmingham, Alabama; pp. 95-124

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Section 5: Miscelleneous, Ectc Coordinating Committee Jan 2016

Section 5: Miscelleneous, Ectc Coordinating Committee

Early Career Technical Journal (ECTJ)

Proceedings of the 16th Annual Early Career Technical Conference, November 5, 2016. School of Engineering, University of Alabama at Birmingham, Birmingham, Alabama; pp. 125-152

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Respiratory Airflow Characteristics In Obstructed Small Airways, Jongwon Kim, Ramana Pidaparti Jan 2016

Respiratory Airflow Characteristics In Obstructed Small Airways, Jongwon Kim, Ramana Pidaparti

Early Career Technical Journal (ECTJ)

Section 1: Bio-Medical/Bioengineering; pp. 3-8

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Section 6: Thermal Sciences, Ectc Coordinating Committee Jan 2016

Section 6: Thermal Sciences, Ectc Coordinating Committee

Early Career Technical Journal (ECTJ)

Proceedings of the 16th Annual Early Career Technical Conference, November 5, 2016. School of Engineering, University of Alabama at Birmingham, Birmingham, Alabama; pp. 153-174

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Dynamical Response Of Alveolar Sac Due To Different Breathing Condition: A Mechanical Model, Tarin Singhapakdi, Israr B M Ibrahim, Ramana Pidaparti Jan 2016

Dynamical Response Of Alveolar Sac Due To Different Breathing Condition: A Mechanical Model, Tarin Singhapakdi, Israr B M Ibrahim, Ramana Pidaparti

Early Career Technical Journal (ECTJ)

Section 1: Bio-Medical/Bioengineering; pp. 9-14

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Proceedings Of The 16th Annual Early Career Technical Conference (Complete Issue), Ectc Coordinating Committee Jan 2016

Proceedings Of The 16th Annual Early Career Technical Conference (Complete Issue), Ectc Coordinating Committee

Early Career Technical Journal (ECTJ)

Proceedings of the 16th Annual Early Career Technical Conference, November 5, 2016. School of Engineering, University of Alabama at Birmingham, Birmingham, Alabama

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A Subject-Variability Study Of Airflow Transport For Three Human Lung-Airway Configurations, Yu Feng, Clement Kleinstreuer Jan 2016

A Subject-Variability Study Of Airflow Transport For Three Human Lung-Airway Configurations, Yu Feng, Clement Kleinstreuer

Early Career Technical Journal (ECTJ)

Section 1: Bio-Medical/Bioengineering; pp. 22-29

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Tractor Power Hop: Wheel Normal Reaction Analysis, Siyuan Hunter Zhang, Vladimir Vantsevich Jan 2016

Tractor Power Hop: Wheel Normal Reaction Analysis, Siyuan Hunter Zhang, Vladimir Vantsevich

Early Career Technical Journal (ECTJ)

Section 2: Design & Manufacturing; pp. 38-41

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Design Of A Balance Sensing System For People With Physical Disabilities Using Velostat, John M. Hoyle, Alan W. Eberhardt Jan 2016

Design Of A Balance Sensing System For People With Physical Disabilities Using Velostat, John M. Hoyle, Alan W. Eberhardt

Early Career Technical Journal (ECTJ)

Section 2: Design & Manufacturing; pp. 50-55

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Viscosity And Morphology Modification Of Length Sorted Single Walled Carbon Nanotubes In Pib Matrices, Hanxiao Huang, Bohoa Li, Daneesh Simien Jan 2016

Viscosity And Morphology Modification Of Length Sorted Single Walled Carbon Nanotubes In Pib Matrices, Hanxiao Huang, Bohoa Li, Daneesh Simien

Early Career Technical Journal (ECTJ)

Section 2: Design & Manufacturing; pp. 42-49

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Design And Analysis Of A Long-Endurance Humanitarian Uav, Ali Darwish, Arie Nakhmani Jan 2016

Design And Analysis Of A Long-Endurance Humanitarian Uav, Ali Darwish, Arie Nakhmani

Early Career Technical Journal (ECTJ)

Section 2: Design & Manufacturing; pp. 56-61

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On-Machine Cutting Tool Wear Monitoring Technique Based On Edge Diffraction Theory, Chabum Lee, Seongkyul Jeon Jan 2016

On-Machine Cutting Tool Wear Monitoring Technique Based On Edge Diffraction Theory, Chabum Lee, Seongkyul Jeon

Early Career Technical Journal (ECTJ)

Section 3: Materials; pp. 65-69

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Determination Of Mechanical Properties For Type 1 Portland Cement Paste With Glass Microspheres As An Inert Filler, Zachary J. Wallace, Damian L. Stoddard, Matt Nelms, Wayne Hodo, A M. Rajendram Jan 2016

Determination Of Mechanical Properties For Type 1 Portland Cement Paste With Glass Microspheres As An Inert Filler, Zachary J. Wallace, Damian L. Stoddard, Matt Nelms, Wayne Hodo, A M. Rajendram

Early Career Technical Journal (ECTJ)

Section 3: Materials; pp. 70-74

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Dynamic And Damping Properties Of Wood - Based Composite Using The Cantilever Beam Vibration Technique, Maharshi Dave, Tejas Pandya, Damian Stoddard Jan 2016

Dynamic And Damping Properties Of Wood - Based Composite Using The Cantilever Beam Vibration Technique, Maharshi Dave, Tejas Pandya, Damian Stoddard

Early Career Technical Journal (ECTJ)

Section 3: Materials; pp. 75-81

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Novel Surface Roughness Measurement Technique Using Capacitance Effect, Soomin Choi, Chabum Lee Jan 2016

Novel Surface Roughness Measurement Technique Using Capacitance Effect, Soomin Choi, Chabum Lee

Early Career Technical Journal (ECTJ)

Section 3: Materials; pp. 82-84

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Numerical Investigation Of Shock Wave Propoagtion In Biomineralized Fish Scale, Matthew Nelms, Wayne Hodo, A M. Rajendran Jan 2016

Numerical Investigation Of Shock Wave Propoagtion In Biomineralized Fish Scale, Matthew Nelms, Wayne Hodo, A M. Rajendran

Early Career Technical Journal (ECTJ)

Section 3: Materials; pp. 90-94

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Hierarchical Grouping In Particle Swarm Optimization – Hgpso, Sanjay Sarma O V, Ramana M. Pidaparti, Ankita Joshi Jan 2016

Hierarchical Grouping In Particle Swarm Optimization – Hgpso, Sanjay Sarma O V, Ramana M. Pidaparti, Ankita Joshi

Early Career Technical Journal (ECTJ)

Section 4: Materials; pp. 97-103

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Applications Of Lidar In Autonomous Vehicles, Allen J. Stewart, Jonathan Burden, Kevin Mcfall Jan 2016

Applications Of Lidar In Autonomous Vehicles, Allen J. Stewart, Jonathan Burden, Kevin Mcfall

Early Career Technical Journal (ECTJ)

Section 5: Miscelleneous; pp. 131-133

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