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Articles 1 - 30 of 124
Full-Text Articles in Engineering
Flight Physician - October, 2016, Civil Aviation Medical Association
Flight Physician - October, 2016, Civil Aviation Medical Association
Browse all Civil Aviation Medical Association Newsletters
A twenty-seven page newsletter of the Civil Aviation Medical Association. The newsletter provided news about civil aviation medicine and information related to the organization.
Somatic Stimulation Causes Frontoparietal Cortical Changes In Neonates: A Functional Near-Infrared Spectroscopy Study, Nasser H. Kashou, Irfaan Akram Dar, Kathryn Hasenstab, Ramzi W. Nahhas, Sudarshan R. Jadcherla
Somatic Stimulation Causes Frontoparietal Cortical Changes In Neonates: A Functional Near-Infrared Spectroscopy Study, Nasser H. Kashou, Irfaan Akram Dar, Kathryn Hasenstab, Ramzi W. Nahhas, Sudarshan R. Jadcherla
Biomedical, Industrial & Human Factors Engineering Faculty Publications
Palmar and plantar grasp are the foremost primitive neonatal reflexes and functions. Persistence of these reflexes in infancy is a sign of evolving cerebral palsy. Our aims were to establish measurement feasibility in a clinical setting and to characterize changes in oxyhemoglobin (HbO) and deoxyhemoglobin (HbD) concentration in the bilateral frontoparietal cortex in unsedated neonates at the crib-side using functional near-infrared spectroscopy (fNIRS). We hypothesized that bilateral concentration changes will occur upon somatic central and peripheral somatic stimulation. Thirteen preterm neonates (five males) underwent time 1, and six (two males) returned for time 2 (mean PMA ¼ 41.6 and 47.0 …
Nonaffine Rearrangements Of Atoms In Deformed And Quiescent Binary Glasses, Nikolai V. Priezjev
Nonaffine Rearrangements Of Atoms In Deformed And Quiescent Binary Glasses, Nikolai V. Priezjev
Mechanical and Materials Engineering Faculty Publications
The influence of periodic shear deformation on nonaffine atomic displacements in an amorphous solid is examined via molecular dynamics simulations. We study the three-dimensional Kob-Andersen binary mixture model at a finite temperature. It is found that when the material is periodically strained, most of the atoms undergo repetitive nonaffine displacements with amplitudes that are broadly distributed. We show that particles with large amplitudes of nonaffine displacements are organized into compact clusters. With increasing strain amplitude, spatial correlations of nonaffine displacements become increasingly long-ranged, although they remain present even in a quiescent system due to thermal fluctuations.
Flight Physician - July, 2016, Civil Aviation Medical Association
Flight Physician - July, 2016, Civil Aviation Medical Association
Browse all Civil Aviation Medical Association Newsletters
A twenty-one page newsletter of the Civil Aviation Medical Association. The newsletter provided news about civil aviation medicine and information related to the organization.
Carbon Nanotube Based Groundwater Remediation: The Case Of Trichloroethylene, Kshitij C. Jha, Zhuonan Liu, Hema Vijwani, Mallikarjuna Nadagouda, Sharmila M. Mukhopadhyay, Mesfin Tsige
Carbon Nanotube Based Groundwater Remediation: The Case Of Trichloroethylene, Kshitij C. Jha, Zhuonan Liu, Hema Vijwani, Mallikarjuna Nadagouda, Sharmila M. Mukhopadhyay, Mesfin Tsige
Mechanical and Materials Engineering Faculty Publications
Adsorption of chlorinated organic contaminants (COCs) on carbon nanotubes (CNTs) has been gaining ground as a remedial platform for groundwater treatment. Applications depend on our mechanistic understanding of COC adsorption on CNTs. This paper lays out the nature of competing interactions at play in hybrid, membrane, and pure CNT based systems and presents results with the perspective of existing gaps in design strategies. First, current remediation approaches to trichloroethylene (TCE), the most ubiquitous of the COCs, is presented along with examination of forces contributing to adsorption of analogous contaminants at the molecular level. Second, we present results on TCE adsorption …
Micro-Raman Investigation Of Residual Stresses In Sic/Sic Composites, Kaitlin Kollins
Micro-Raman Investigation Of Residual Stresses In Sic/Sic Composites, Kaitlin Kollins
The University Honors Program
Ceramic Matrix Composites (CMCs) are being developed for use in extreme operating conditions. Specifically, there is interest to replace superalloys with Silicon-Carbide/Silicon-Carbide (SiC/SiC) CMCs in the hot section of gas turbine engines because of their lower densities, high temperature performance, and oxidation resistance. Due to the high temperature processing conditions of SiC/SiC CMCs, there are thermal residual stresses inherent to the material. This study focused on using micro-Raman Spectroscopy on as manufactured SiC/SiC CMCs to measure and investigate the residual stresses within a fiber and the matrix material. Following the silicon Raman active mode at 520 cm-1 and the SiC …
Flight Physician - May, 2016, Civil Aviation Medical Association
Flight Physician - May, 2016, Civil Aviation Medical Association
Browse all Civil Aviation Medical Association Newsletters
A nineteen page newsletter of the Civil Aviation Medical Association. The newsletter provided news about civil aviation medicine and information related to the organization.
Comparing Network Centrality Measures Of Non-Traditional Students In An Introductory Physics Class, Emily N. Sandt, Adrienne L. Traxler
Comparing Network Centrality Measures Of Non-Traditional Students In An Introductory Physics Class, Emily N. Sandt, Adrienne L. Traxler
Symposium of Student Research, Scholarship, and Creative Activities Materials
The goal of this research was to compare different models of network influence for students. Two research questions were composed: 1. How do common centrality measures compare when ranking students' network influence? 2. Do centrality values of non-traditional students show different trend than traditional students?
Finding Specific, Topic Related Information From A Sea Of Social Media Posts, Scott J. Duberstein, Daniel Asamoah, Derek Doran, Shu Z. Schiller
Finding Specific, Topic Related Information From A Sea Of Social Media Posts, Scott J. Duberstein, Daniel Asamoah, Derek Doran, Shu Z. Schiller
Symposium of Student Research, Scholarship, and Creative Activities Materials
As social media continues to become an incredible mode of communication in daily life dealing with the exchange of information, these systems provide authors a platform where they can share their thoughts, feelings, and experiences about a number of topics. Harnessing the information expressed publicly through these modes can be incredibly powerful: public perceptions, signals, and data about a variety of specific topics could be extracted and studied from these posts. However, there is a common trade-off in collecting information about a topic from social media: the more specific the topic, generally, the more challenging it is to extract meaningful …
Investigating The After-Effects Of Stochastic Resonance For Use In Laparoscopic Surgery, Muhammad S. Hamdan, Caroline G. L. Cao
Investigating The After-Effects Of Stochastic Resonance For Use In Laparoscopic Surgery, Muhammad S. Hamdan, Caroline G. L. Cao
Symposium of Student Research, Scholarship, and Creative Activities Materials
Laparoscopic surgery is a modern surgical technique in which surgeons insert tools through small incisions in the abdomen to perform a surgical procedure.
Nondestructive Evaluation & Radar Imaging Using Terahertz Signals, D. Amal Mirando, Michael D. Higgins, Sonya Sokhey, Matthew Larson, Douglas T. Petkie
Nondestructive Evaluation & Radar Imaging Using Terahertz Signals, D. Amal Mirando, Michael D. Higgins, Sonya Sokhey, Matthew Larson, Douglas T. Petkie
Symposium of Student Research, Scholarship, and Creative Activities Materials
Nondestructive imaging is a method of examining a material without direct contact that additionally does not alter the properties of the material. The terahertz imaging system currently in development uses the principle of interferometry (a Michelson Interferometer) such that frequency modulated terahertz signals are split and directed to the object under study and a reference mirror; then the detector will acquire the intensity of the combined reflected signals that contains information about the objects in the path of the beam.
Evaluation Of A Brief Marriage Intervention For Internal Behavioral Health Consultants In Military Primary Care, Ashley L. Evans, Jeffrey A. Cigrang, Tatiana D. Grey, James V. Cordova, Elizabeth Najera, Rosalyn S. Pace, Abby D. Fields, Michael A. Glotfelter, Jennifer A. Mitchell, Jolyn Tatum
Evaluation Of A Brief Marriage Intervention For Internal Behavioral Health Consultants In Military Primary Care, Ashley L. Evans, Jeffrey A. Cigrang, Tatiana D. Grey, James V. Cordova, Elizabeth Najera, Rosalyn S. Pace, Abby D. Fields, Michael A. Glotfelter, Jennifer A. Mitchell, Jolyn Tatum
Symposium of Student Research, Scholarship, and Creative Activities Materials
Military couples face significant challenges to their relationships including demanding schedules, multiple deployments, and frequent moves. Despite the high costs of chronic marital distress, very few military (or civilian) couples seek marriage therapy. The military services and the VA system have implemented collaborative care models in primary care where internal behavioral health consultants are integrated into primary care. Integrated primary care can reduce the stigma of behavioral health services and may increase the odds that couples would seek help earlier. There are no established couple interventions designed for use in primary care. The purpose of this presentation is to describe …
Synthesis Of Functionalized Peek Analogues Via “One-Pot” Synthesis, Zachary B. Ewing, Eric A. Fossum
Synthesis Of Functionalized Peek Analogues Via “One-Pot” Synthesis, Zachary B. Ewing, Eric A. Fossum
Symposium of Student Research, Scholarship, and Creative Activities Materials
Poly(arylene ether)s, PAEs
• High performance engineering thermoplastic materials
• Excellent mechanical properties and thermal stability
• Resistant to hydrolysis and oxidation
• Many prepared via nucleophilic aromatic substitution (NAS)
• Electron withdrawing groups (EWG) typically in para positions
• PAEs can also be synthesized with an EWG in the meta positions, creating easily functionalized systems, with no change in the backbone
Wright State University's Celebration Of Research, Scholarship And Creative Activities Book Of Abstracts From Friday, April 15, 2016, Wright State University Office Of Undergraduate Research And Stemm Activities
Wright State University's Celebration Of Research, Scholarship And Creative Activities Book Of Abstracts From Friday, April 15, 2016, Wright State University Office Of Undergraduate Research And Stemm Activities
Symposium of Student Research, Scholarship, and Creative Activities Materials
The student abstract booklet is a compilation of abstracts from students' oral and poster presentations at Wright State University's Annual Celebration of Research, Scholarship and Creative Activities on April 15, 2016.
City360: Visualizing Multimodal City Events For Decision Support, Vaikunth Sridharan, Tanvi Banerjee, Pramod Anantharam, Archana Sheshadri, Roopteja Muppalla, Amit P. Sheth, Krishnaprasad Thirunarayan
City360: Visualizing Multimodal City Events For Decision Support, Vaikunth Sridharan, Tanvi Banerjee, Pramod Anantharam, Archana Sheshadri, Roopteja Muppalla, Amit P. Sheth, Krishnaprasad Thirunarayan
Symposium of Student Research, Scholarship, and Creative Activities Materials
Cities are increasingly outfitted with sensors for monitoring various conditions such as traffic, weather, air quality, and infrastructure related issues. Such well outfitted cities are generating massive amounts of multi-modal data leading to daunting challenges in assimilating, visualizing, and making sense of this data by city authorities and citizens. We propose City360 to address these challenges and provide decision support to city authorities and citizens. We demonstrate the utility of our system through concrete use cases for San Francisco Bay area that utilize heterogeneous data from various open city data sources.
Flight Physician - March, 2016, Civil Aviation Medical Association
Flight Physician - March, 2016, Civil Aviation Medical Association
Browse all Civil Aviation Medical Association Newsletters
A twenty-five page newsletter of the Civil Aviation Medical Association. The newsletter provided news about civil aviation medicine and information related to the organization.
Carbon-Based Hierarchical Scaffolds For Myoblast Differentiation: Synergy Between Nano-Functionalization And Alignment, Akhil Patel, Shilpaa Mukundan, Wenhu Wang, Anil K. Karumuri, Vinayak Sant, Sharmila M. Mukhopadhyay, Shilpa Sant
Carbon-Based Hierarchical Scaffolds For Myoblast Differentiation: Synergy Between Nano-Functionalization And Alignment, Akhil Patel, Shilpaa Mukundan, Wenhu Wang, Anil K. Karumuri, Vinayak Sant, Sharmila M. Mukhopadhyay, Shilpa Sant
Mechanical and Materials Engineering Faculty Publications
While several scaffolds have been proposed for skeletal muscle regeneration, multiscale hierarchical scaffolds with the complexity of extracellular matrix (ECM) haven’t been engineered successfully. By precise control over nano- and microscale features, comprehensive understanding of the effect of multiple factors on skeletal muscle regeneration can be derived. In this study, we engineered carbon-based scaffolds with hierarchical nano- and microscale architecture with controlled physico-chemical properties. More specifically, we built multiscale hierarchy by growing carbon nanotube (CNT) carpets on two types of scaffolds, namely, interconnected microporous carbon foams and aligned carbon fiber mats. Nanostructured CNT carpets offered fine control over nano-roughness and …
Quantitative Analysis Of Retrieved Glenoid Liners, Katelyn Childs, Lynn Crosby, Tarun Goswami
Quantitative Analysis Of Retrieved Glenoid Liners, Katelyn Childs, Lynn Crosby, Tarun Goswami
Biomedical, Industrial & Human Factors Engineering Faculty Publications
Revision of orthopedic surgeries is often expensive and involves higher risk from complications. Since most total joint replacement devices use a polyethylene bearing, which serves as a weak link, the assessment of damage to the liner due to in vivo exposure is very important. The failures often are due to excessive polyethylene wear. The glenoid liners are complex and hemispherical in shape and present challenges while assessing the damage. Therefore, the study on the analysis of glenoid liners retrieved from revision surgery may lend insight into common wear patterns and improve future product designs. The purpose of this pilot study …
Long-Term Velaglucerase Alfa Treatment In Children With Gaucher Disease Type 1 Naïve To Enzyme Replacement Therapy Or Previously Treated With Imiglucerase, Laurie Smith, William Rhead, Joel Charrow, Suma P. Shankar, Ashish Bavdekar, Nicola Longo, Rebecca Mardach, Paul Harmatz, Thomas N. Hangartner, Hak-Myung Lee, Eric Crombez, Gregory M. Pastores
Long-Term Velaglucerase Alfa Treatment In Children With Gaucher Disease Type 1 Naïve To Enzyme Replacement Therapy Or Previously Treated With Imiglucerase, Laurie Smith, William Rhead, Joel Charrow, Suma P. Shankar, Ashish Bavdekar, Nicola Longo, Rebecca Mardach, Paul Harmatz, Thomas N. Hangartner, Hak-Myung Lee, Eric Crombez, Gregory M. Pastores
Biomedical, Industrial & Human Factors Engineering Faculty Publications
Background
Gaucher Disease type 1 (GD1) often manifests in childhood. Early treatment with enzyme replacement therapy (ERT) may prevent disease complications. We report the assessment of velaglucerase alfa ERT in pediatric GD1 patients who participated in a long-term extension study (HGT-GCB-044, ClinicalTrials.gov Identifier NCT00635427).
Methods
Safety and efficacy were evaluated in pediatric patients receiving velaglucerase alfa 30–60 U/kg by intravenous infusion every other week. In addition to key hematological and visceral efficacy assessments, exploratory assessments conducted specifically in pediatric patients included evaluation of height, bone age, bone marrow burden, and Tanner stage of puberty.
Results
The study included 24 …
Reversible Plastic Events During Oscillatory Deformation Of Amorphous Solids, Nikolai V. Priezjev
Reversible Plastic Events During Oscillatory Deformation Of Amorphous Solids, Nikolai V. Priezjev
Mechanical and Materials Engineering Faculty Publications
The effect of oscillatory shear strain on nonaffine rearrangements of individual particles in a three-dimensional binary glass is investigated using molecular dynamics simulations. The amorphous material is represented by the Kob-Andersen mixture at the temperature well below the glass transition. We find that during periodic shear deformation of the material, some particles undergo reversible nonaffine displacements with amplitudes that are approximately power-law distributed. Our simulations show that particles with large amplitudes of nonaffine displacement exhibit a collective behavior; namely, they tend to aggregate into relatively compact clusters that become comparable with the system size near the yield strain. Along with …
Stimulus And Optode Placement Effects On Functional Near-Infrared Spectroscopy Of Visual Cortex, Nasser H. Kashou, Brenna M. Giacherio
Stimulus And Optode Placement Effects On Functional Near-Infrared Spectroscopy Of Visual Cortex, Nasser H. Kashou, Brenna M. Giacherio
Biomedical, Industrial & Human Factors Engineering Faculty Publications
Functional near-infrared spectroscopy has yet to be implemented as a stand-alone technique within an ophthalmology clinical setting, despite its promising advantages. The present study aims to further investigate reliability of visual cortical signals. This was achieved by: (1) assessing the effects of optode placements using the 10–20 International System of Electrode Placement consisting of 28 channels, (2) determining effects of stimulus size on response, and (3) evaluating response variability as a result of cap placement across three sessions. Ten participants with mean age 23.8 4.8 years (five male) and varying types of hair color and thickness were recruited. Visual stimuli …
Analysis Of A Clinically Failed, Mechanically Intact, Hemi-Toe Implant, Swetha Varadharajan, Richard T. Laughlin, Tarun Goswami
Analysis Of A Clinically Failed, Mechanically Intact, Hemi-Toe Implant, Swetha Varadharajan, Richard T. Laughlin, Tarun Goswami
Biomedical, Industrial & Human Factors Engineering Faculty Publications
In this case study a clinically failed, mechanically intact, hemi-toe device was investigated. The clinical indication of the failure constitutes radiolucent line indicating loosening of the implant and possible interactions among the bone-implant initiated by osteolysis may become a factor, producing pain, inflammatory reactions, deformity and discomfort. The patient file was not available to determine these parameters. The device was titanium coated, Cobalt Chromium alloy used for making hemi-toe. Degeneration of hemi implant was due to spalling of the coating from the surface, causing loosening of stem from bone. However, pre-removal X-ray films were not available to confirm. Mechanism by …
A Genetic Algorithm For Asic Floorplanning, Anvesh Kumar Perumalla
A Genetic Algorithm For Asic Floorplanning, Anvesh Kumar Perumalla
Browse all Theses and Dissertations
Semiconductor integrated circuits (ICs) have become key components in almost every aspect of our daily lives. From simple home appliances to extremely sophisticated aerospace systems, we have become increasingly dependent on ICs. System-on-chip (SoC) is an IC methodology that includes multiple design technologies on a single IC chip. SoC was developed to further integrate and manage system complexity. Due to SoC and increasingly dense IC fabrication technologies, design time and thereby system time-to-market are becoming more critical drivers of the IC design cycle. In order to address issues related to design time and time-to-market, highly optimized semiconductor intellectual property (IP) …
Dynamic Level-2 Cache Memory Locking By Utilizing Multiple Miss Tables, Andrew Louis Mocniak
Dynamic Level-2 Cache Memory Locking By Utilizing Multiple Miss Tables, Andrew Louis Mocniak
Browse all Theses and Dissertations
Cache memory plays a vital role in a system's performance by acting as a buffer to quickly supply requested instruction/data blocks from the main memory to the central processing unit (CPU). Cache management techniques may increase or decrease a system's performance. The results vary from process to process, depending on how well optimized the cache management technique is for a particular process. The inclusion of level-2 (L2) cache locking has been shown in previous studies to be beneficial in increasing a system's performance. This is further improved upon through the inclusion of a miss table (MT), which keeps track of …
Accelerated Hyperspectral Unmixing With Endmember Variability Via The Sum-Product Algorithm, Charan Puladas
Accelerated Hyperspectral Unmixing With Endmember Variability Via The Sum-Product Algorithm, Charan Puladas
Browse all Theses and Dissertations
The rich spectral information captured by hyperspectral sensors has given rise to a number of remote sensing applications, ranging from vegetative assessment and crop health monitoring, to military surveillance and combatant identification. However, due to limited spatial resolution, multiple ground materials generally contribute, i.e. mix, to form the spectrum recorded for a single pixel. The unmixing problem considers the inverse problem of determining the underlying material spectra, called endmembers, from sensor measurements. While classical unmixing approaches were deterministic in nature and did not attempt to identify in-scene materials, recent methods use labeled training data to generate statistical models of endmember …
The Effect Of Laser Power And Scan Speed On Melt Pool Characteristics Of Pure Titanium And Ti-6al-4v Alloy For Selective Laser Melting, Chandrakanth Kusuma
The Effect Of Laser Power And Scan Speed On Melt Pool Characteristics Of Pure Titanium And Ti-6al-4v Alloy For Selective Laser Melting, Chandrakanth Kusuma
Browse all Theses and Dissertations
Selective Laser Melting (SLM) is an additive manufacturing (AM) technique that creates complex parts by selectively melting metal powder layer-by-layer. In SLM, the process parameters decide the quality of the fabricated component. In this study, single beads of commercially pure titanium (CP-Ti) and Ti-6Al-4V alloy are melted on a substrate of the same material as powder using an in-house built SLM machine. Multiple combinations of laser power and scan speed are used for single bead fabrication while the laser beam diameter and powder layer thickness are kept constant. This experimental study investigates the influence of laser power, scan speed and …
Characterization Of Peripheral Lung Lesions By Statistical Image Processing Of Endobronchial Ultrasound Images, Aaron T. Madaris
Characterization Of Peripheral Lung Lesions By Statistical Image Processing Of Endobronchial Ultrasound Images, Aaron T. Madaris
Browse all Theses and Dissertations
This thesis introduces the concept of implementing greyscale analysis, also known as intensity analysis, on endobronchial ultrasound (EBUS) images for the purposes of diagnosing peripheral lung tumors. The statistical methodology of using greyscale and histogram analysis allows the characterization of lung tissue in EBUS images. Regions of interest (ROI) will be analyzed in MATLAB and a feature vector will be created. A feature vector of first-order, second-order and histogram greyscale analysis will be created and used for the classification of malignant vs benign peripheral lung tumors. The tools that were implemented were MedCalc for the initial statistical analysis of receiver …
Openthinning: Fast 3d Thinning Based On Local Neighborhood Lookups, Tobias Post, Christina Gillmann, Thomas Wischgoll, Hans Hagen
Openthinning: Fast 3d Thinning Based On Local Neighborhood Lookups, Tobias Post, Christina Gillmann, Thomas Wischgoll, Hans Hagen
Computer Science and Engineering Faculty Publications
3D Thinning is an often required image processing task in order to perform shape analysis in various applications. For researchers in these domains, a fast, flexible and easy to access implementation is required. Open source solutions, as the Insights Segmentation and Registration Toolkit (ITK), are often used for image processing and visualization tasks, due to their wide range of provided algorithms. Unfortunately, ITK’s thinning implementation is computational expensive and allows solely one specific thinning approach. Therefore, this work presents OpenThinning, an open source thinning solution for 3D image data. The implemented algorithm evaluates a moving local neighborhood to find deletable …
Cardiovascular Dieseases: From Data Generation To Analysis, Thomas Wischgoll
Cardiovascular Dieseases: From Data Generation To Analysis, Thomas Wischgoll
Computer Science and Engineering Faculty Publications
Cardiovascular diseases remain the leading cause of death in Western societies. This presentation will provide insight into the use of expert knowledge and models to derive diagnostic tools that have the potential to aid in the diagnosis of diffuse cardiovascular diseases that tend to be more difficult to detect in CT angiograms. In order to develop these methods more basic research is needed to prove the validity of the approach, including validation of accuracy as well as approach itself. For that, specimens of porcine hearts were prepared and then analyzed followed by a statistical comparison between computed and optical measurements. …
Super-Resolution Reconstruction Of Mri, Sara Gharabaghi, Thomas Wischgoll, Nasser H. Kashou
Super-Resolution Reconstruction Of Mri, Sara Gharabaghi, Thomas Wischgoll, Nasser H. Kashou
Computer Science and Engineering Faculty Publications
Magnetic Resonance Imaging (MRI) is a non-invasive technique that is used in clinical applications such as diseases diagnosis and monitoring and treatment progress. Although, MRI scans typically have high in-plane resolution but they have very poor resolution in slice direction. Furthermore, in some applications with limited acquisition time or where the subject is moving, increased slice thickness or inter-slice space (slice gaps) may be used which results in poor resolution MRI.
In this research, we propose a novel Super Resolution (SR) technique for reconstructing High-Resolution (HR) MRI using a sequence of orthogonal Low-Resolution (LR) MRI scans.
The resolution of this …