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Articles 541 - 557 of 557
Full-Text Articles in Biomedical Engineering and Bioengineering
Markerless Analysis Of Upper Extremity Kinematics During Standardized Pediatric Functional Assessment With A Low-Cost Motion Analysis System, Gerald F. Harris, Susan A. Riedel
Markerless Analysis Of Upper Extremity Kinematics During Standardized Pediatric Functional Assessment With A Low-Cost Motion Analysis System, Gerald F. Harris, Susan A. Riedel
Biomedical Engineering Faculty Research and Publications
No abstract provided.
Investigation Of The Utility Of Center Frequency In Electroencephalographic Classification Of Cognitive Workload Transitions, Jones Melissa
Investigation Of The Utility Of Center Frequency In Electroencephalographic Classification Of Cognitive Workload Transitions, Jones Melissa
Browse all Theses and Dissertations
Successful classification of human cognitive workload is a vital component in identifying and avoiding potential performance deficits resulting from operator work overload. Previous research suggests that electroencephalogram (EEG) derived features, including center frequency, provide a robust signal which may be used to obtain highly accurate workload classification. The purpose of this work is to investigate evidence of physiological hysteresis and determine if center frequency improves a classifier's ability to correctly identify workload level. Results confirmed that including spectral data creates the most robust feature sets, while center frequency across all bands is equally reliable for classifying workload in the case …
Biomechanics Of Porcine Renal Artery And The Development Of A Replacment Vessel, Mohamed Gabr
Biomechanics Of Porcine Renal Artery And The Development Of A Replacment Vessel, Mohamed Gabr
Theses and Dissertations
Mechanical characterization of biological soft tissues is essential in the field of biomedical engineering. In this study several loading experiments have been performed to efficiently characterize the passive mechanical response of both native porcine renal arteries and newly developed tissue constructs. The first aim of these studies is to determine whether there is a difference in mechanical response between the main renal artery and its first branch. After fitting the bi-axial data to a Holzapfel-type constitutive model, the results show that there is no statistical difference between the model parameters for renal artery and the first branch. The only significant …
New Insights Into The Spinal Recurrent Inhibitory Pathway Normally And After Motoneuron Regeneration, Ahmed Zayed Obeidat
New Insights Into The Spinal Recurrent Inhibitory Pathway Normally And After Motoneuron Regeneration, Ahmed Zayed Obeidat
Browse all Theses and Dissertations
Despite more than seven decades of intensive research, uncertainty is the hallmark of spinal recurrent inhibition. The simplest possible structure that is formed between the a-motoneuron and its inhibitory interneurons has been the subject of long lasting scientific debate. To date, there is no consensus on the functional significance of this circuit. Even the simplest assumption of a negative feedback loop does not hold true. The current work used the technique of in vivo intracellular recording from the adult rat a-motoneurons to study the normal function and the plasticity after nerve injury and regeneration of this simple, yet intricate spinal …
Elucidating A Role Of Btf And Trap150 In Pre-Mrna Processing And Cell Cycle Progression, Sapna N. Varia
Elucidating A Role Of Btf And Trap150 In Pre-Mrna Processing And Cell Cycle Progression, Sapna N. Varia
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Transcription of protein-coding genes is coordinated with pre-mRNA processing as well as mRNP assembly and nuclear export in mammalian cells. In this dissertation, I examined the functions of two homologous non-classical serine-arginine-rich (SR) proteins, Btf (BCLAF1) and TRAP150 in these steps of gene regulation. Since Btf and TRAP150 share 39% sequence identity and 66% sequence similarity, I also examined whether Btf and TRAP150 have overlapping or distinct functions in pre-mRNA processing. Using two different reporter loci, I showed in-situ recruitment of Btf and TRAP150 at reporter transcription sites, and I identified both Btf and TRAP150 being associated with a core …
Differential Regulation Of The Hippocampal Taurine Transporter Protein In Rat Brain: Mechanisms Contributing To Neuronal Volume Regulation, Amanda Noelle Freeman
Differential Regulation Of The Hippocampal Taurine Transporter Protein In Rat Brain: Mechanisms Contributing To Neuronal Volume Regulation, Amanda Noelle Freeman
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Background. In osmotic edema, net efflux of taurine from neurons and accumulation by astrocytes contributes to neuronal volume regulation and astrocytic swelling. Taurine is accumulated in both cell types by a sodium- and chloride-dependent 72-75 kDa protein transporter, TauT. TauT functional activity decreases in osmotically swollen neurons but is unaltered in swollen astrocytes, in vitro. This swelling-induced downregulation of neuronal TauT activity is blocked with the tyrosine kinase (TK) inhibitor, genistein. In contrast, PKC activation has no effect on neuronal TauT, but inhibits astrocytic TauT. Thus, we hypothesize that during osmotic swelling, neuronal TauT activity is regulated by a TK …
Reactive Oxygen Modulates B Lymphocyte Function Via The Nfκb/Rel Pathway, Eric J. Romer
Reactive Oxygen Modulates B Lymphocyte Function Via The Nfκb/Rel Pathway, Eric J. Romer
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Reactive Oxygen Intermediates (ROI) can significantly affect B Lymphocyte function, but the effects on key signaling pathways and gene expression in activated and non-activated B lymphocytes are largely undefined. This study demonstrates a concentration dependent effect of exogenous hydrogen peroxide on the transcriptional regulation of a 3' regulatory region of the Immunoglobulin heavy chain gene (3'IghRR). Specifically, low μM hydrogen peroxide induces an enhancing effect while higher μM hydrogen peroxide (greater than or equal to 100 μM) is suppressive. The enhancing effects of hydrogen peroxide on 3'IghRR activity are dependent on the NFκB/Rel pathway, and appear to be most prominent …
A Comprehensive Tool And Analytical Pathway For Differential Molecular Profiling And Biomarker Discovery, Claude Curtis Grigsby
A Comprehensive Tool And Analytical Pathway For Differential Molecular Profiling And Biomarker Discovery, Claude Curtis Grigsby
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The key requirements to any empirically based study are to: (1) accurately measure and then compare the collected results in determining the result of the hypothesis being tested; and (2) collect a sample representative of the entities being studied. To demonstrate that an informatics tool can be designed that provides spectral registration, spectral and chromatographic alignment, visualization, and comparative analysis for data generated from multiple analytical platforms, e.g., LC-MS and GC-MS, the results and data analysis of five unique sets of experiments using a suite of novel informatics tools are presented. Comprehensive and reproducible sample collection techniques were developed concomitantly …
Simulating Hemodynamics In In Vitro Culture Models: Implications On Nano-Biointeractions, Monita Sharma
Simulating Hemodynamics In In Vitro Culture Models: Implications On Nano-Biointeractions, Monita Sharma
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Gold nanoparticles (Au-NPs) have demonstrated great potential in the development of a variety of tools with applications ranging from biomedical to military fields. Consequently, there is increasing concern regarding the toxic potential of these nanomaterials. Biodistribution studies demonstrate clearance of Au-NPs from peripheral circulation and bulk localization primarily in the liver and spleen post- intravenous administration. Deposition of Au-NPs in spleen suggests the potential for direct exposure of immune cells to these foreign materials under relatively static conditions. Although much less, due to the Blood Brain Barrier (BBB), Au-NPs appear to also deposit in the brain, suggesting that the resident …
The Molecular Genetics Learning Progressions: Revisions And Refinements Based On Empirical Testing In Three 10th Grade Classrooms, Amber Nicole Todd
The Molecular Genetics Learning Progressions: Revisions And Refinements Based On Empirical Testing In Three 10th Grade Classrooms, Amber Nicole Todd
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In the past few decades, there has been a large push for increasing scientific literacy (AAAS, 1989; AAAS, 1993; Achieve, 2013; NRC, 1996; NRC, 2012), especially in areas that are rapidly advancing, like molecular genetics. Much research has been done on student understandings of molecular genetics and the consensus is that the concepts are difficult both to learn and teach (Fisher, 1992; Horwitz, 1996; Kindfield, 1992; Lewis & Kattmann, 2004; Marbach-Ad & Stavy, 2000; Stewart et al., 2005; Venville & Treagust, 1998; etc.). Two learning progressions in molecular genetics have been produced (Duncan et al., 2009; Roseman et al. 2006), …
Mobile Computing For Trauma And Surgical Care Continuous Education, Muhammad Y. Alamoud
Mobile Computing For Trauma And Surgical Care Continuous Education, Muhammad Y. Alamoud
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In medical domain, mobile computing has proven to be convenient, effective, and productive. With varying screen sizes, there is a challenge to present the right information in the right format such that medical practitioners can access information quickly. In this thesis, we discuss how mobile computing can be used as a way of continuous education for medical practitioners in the field of trauma and surgical care, and provide design guidelines on how to effectively present information on different mobile form factors. The focus is on three screen sizes- 4.7, 7 and 10.1 in., and three interaction methods - dropdown, slide, …
Functional Near Infrared Detection Of Real And Imagined Finger Taps Using Support Vector Machine, Linear Discriminant Analysis, And Decision Tree Classification Methods, Eugene A. Stoudenmire
Functional Near Infrared Detection Of Real And Imagined Finger Taps Using Support Vector Machine, Linear Discriminant Analysis, And Decision Tree Classification Methods, Eugene A. Stoudenmire
Computational Modeling & Simulation Engineering Theses & Dissertations
This study investigates the thesis that given cerebral response samples of an individual's left, right, both, and imagined finger tapping, continuous wave (CW) functional Near Infrared (fNIR), unregistered with fMRI, can differentiate between any two of the four categories.
Fifty subjects were outfitted with a single source/detector attached to a single, square pad, affixed to their heads using devices such as elastic bands and caps for light shielding. Slides depicting arrows pointing left, right, both directions, or made of dashed lines were presented to each subject, with a slide of text interspersed between each. Subjects tapped with their left finger, …
Development And Characterization Of A 3d Multicell Microtissue Culture Model Of Airway Smooth Muscle., Glenn Gaudette, Adrian West, Nishat Zaman, Darren Cole, Matthew Walker, Wesley Legant, Thomas Boudou, Christopher Chen, John Favreau, Elizabeth Cowley, Geoffrey Maksym
Development And Characterization Of A 3d Multicell Microtissue Culture Model Of Airway Smooth Muscle., Glenn Gaudette, Adrian West, Nishat Zaman, Darren Cole, Matthew Walker, Wesley Legant, Thomas Boudou, Christopher Chen, John Favreau, Elizabeth Cowley, Geoffrey Maksym
Glenn R. Gaudette
Airway smooth muscle (ASM) cellular and molecular biology is typically studied with single-cell cultures grown on flat 2D substrates. However, cells in vivo exist as part of complex 3D structures, and it is well established in other cell types that altering substrate geometry exerts potent effects on phenotype and function. These factors may be especially relevant to asthma, a disease characterized by structural remodeling of the airway wall, and highlights a need for more physiologically relevant models of ASM function. We utilized a tissue engineering platform known as microfabricated tissue gauges to develop a 3D culture model of ASM featuring …
High-Throughput Secondary Screening At The Single-Cell Level, Joseph Robinson
High-Throughput Secondary Screening At The Single-Cell Level, Joseph Robinson
Joseph P Robinson
No abstract provided.
High-Speed Digital Holographic Methods To Characterize The Transient Acousto-Mechanical Response Of Human Tm, I Dobrev, C Furlong, J T. Cheng, J J. Rosowski
High-Speed Digital Holographic Methods To Characterize The Transient Acousto-Mechanical Response Of Human Tm, I Dobrev, C Furlong, J T. Cheng, J J. Rosowski
Ivo Dobrev
Human hearing relies on a delicate sequence of energy transformations from the sound waves in the outer-ear, through mechanical vibrations in the middle-ear, to pressure waves of the fluid in the inner-ear. The investigation of hearing process requires the study of the function of the tympanic membrane (TM) in the energy transformation at the interface of the outer and middle-ear. The investigation of this process requires tools to quantify the acousto-mechanical response of the TM while overcoming the challenges associated with its dimensions, confined location, and the high temporal and spatial complexity of its nanometer scale motions that also relate …
Local Fractional Variational Iteration Method For Fractal Heat Transfer In Silk Cocoon Hierarchy, Ji-Huan He
Local Fractional Variational Iteration Method For Fractal Heat Transfer In Silk Cocoon Hierarchy, Ji-Huan He
Ji-Huan He
A local fractional equation is established for fractal heat transfer in silk cocoon hierarchy, and the local fractional variational iteration method is adopted to solve the equation analytically. The result can well explain the intriguing phenomenon for pupa's survival at extremes of weather from negative 40 degrees to 50 degrees.
A Clinical Comparison Between Two Common Transtibial Prosthetic Suspension Systems, Hossein Gholizadeh
A Clinical Comparison Between Two Common Transtibial Prosthetic Suspension Systems, Hossein Gholizadeh
Hossein Gholizadeh
No abstract provided.