Developing Strategies To Toughen Bio-Inspired Adhesives, 2018 Indiana University of Pennsylvania
Developing Strategies To Toughen Bio-Inspired Adhesives, Narelli P. Narciso, Samuel Lee Huntington, Jonathan J. Wilker
The Summer Undergraduate Research Fellowship (SURF) Symposium
Mussels and other marine creatures adhere very well in underwater environments, having the ability to withstand the force of the sea. These animals have inspired synthetic biomimetic adhesives for wet systems, presenting potential for biomedical applications. However, most current commercial adhesives tend to be brittle, not resisting repetitive movements. This study assesses toughening strategies to improve the mussel-inspired adhesives’ ductility while maintaining its strength. The strategies included altering the polymer’s chemical structure by changing the percentage of polyethylene glycol (PEG) in the molecule and by adding fillers, such as calcium carbonate, silica and nacre - a calcium carbonate compound found ...
The Effectiveness Of Localized Ultrasound And Aptamer Surface Modification On Nanoemulsions For Drug Delivery To Spheroids., 2018 University of Louisville
The Effectiveness Of Localized Ultrasound And Aptamer Surface Modification On Nanoemulsions For Drug Delivery To Spheroids., Daniel A. Hodge
Electronic Theses and Dissertations
Cancer is a group of diseases that affects 1.6 million and kills nearly 600,000 Americans each year. The National Cancer Institute defines it as “diseases in which abnormal cells divide without control and can invade nearby tissues” and it is often treated with one or more of the following: chemotherapy, radiation, surgery. The expense for these treatments is expected to rise to $156 billion by 2020. Localized delivery can improve effectiveness and cancer survival rates, decrease the cost of treatment, and decrease the side effects of chemotherapy. This paper addresses models for this localized delivery through nanoemulsions. Nanoemulsions ...
Preparation And Characterization Of Functionalized Heparin-Loaded Poly-Ɛ-Caprolactone Fibrous Mats To Prevent Infection With Human Papillomaviruses, 2018 University of Nebraska-Lincoln
Preparation And Characterization Of Functionalized Heparin-Loaded Poly-Ɛ-Caprolactone Fibrous Mats To Prevent Infection With Human Papillomaviruses, Daniela Gonzalez, Jorge Ragusa, Peter C. Angeletti, Gustavo F. Larsen
Chemical and Biomolecular Engineering -- All Faculty Papers
In this study, heparin-loaded poly-ε-caprolactone (PCL) fibrous mats were prepared and characterized based on their physical, cytotoxic, thermal, and biological properties. The main objective of the work described here was to test the hypothesis that incorporation of heparin into a PCL carrier could serve as bio-compatible material capable of inhibiting Human Papillomavirus (HPV) infection. The idea of firmly anchoring heparin to capture soluble virus, vs. a slow heparin release to inhibit a virus in solution was tested. Thus, one material was produced via conventional heparin matrix encapsulation and electrohydrodynamic fiber processing in one step. A second type of material was ...
Multi-Purpose Heart Valve Therapy Assembly Fixture, 2018 California Polytechnic State University, San Luis Obispo
Multi-Purpose Heart Valve Therapy Assembly Fixture, Alec John Foster, John Patrick Hofstetter, Emily Lim
No abstract provided.
Investigating Smoke Exposure And Chronic Obstructive Pulmonary Disease (Copd) With A Calibrated Agent Based Model (Abm) Of In Vitro Fibroblast Wound Healing., J Alex Ratti, Angela Reynolds, Rebecca L. Heise
Biology and Medicine Through Mathematics Conference
No abstract provided.
Modeling Eeg And Tdcs In Scirun Software Packages, 2018 University of Rhode Island
Modeling Eeg And Tdcs In Scirun Software Packages, Aiden Keene, Aiden Thomas Keene
Senior Honors Projects
Never before has there been a greater emphasis on improving the shortcomings of treating mental health conditions. Our generation has more knowledge about technological practices with the potential to monitor and treat mental health symptoms than that of any generation before us. A breakthrough in this field made by CREmedical is called Tripolar Concentric Ring Electrodes (TCRE’s), which can measure signals from the brain more accurately than conventional electrodes. At CREmedical, TCREs are being used to study differences in electrical activity in the brain so as to identify abnormalities, and monitor responses to stimulation therapies. This semester I had ...
Extraction And Analysis Of Vector Flow Imaging Data In A Pediatric Population, 2018 University of Arkansas, Fayetteville
Extraction And Analysis Of Vector Flow Imaging Data In A Pediatric Population, Bailey Stinnett
Biomedical Engineering Undergraduate Honors Theses
Vector flow imaging (VFI) is a new ultrasound technology that provides real time, angle-independent visualization of flow velocities in the heart and great vessels. Thus far, VFI has been used for superficial applications due to the limited penetration depth of available transducer probes; however, this depth in smaller pediatric patients enables adequate aortic views. In this project, VFI was used to study pediatric aortic stenosis (PAS)—a congenital heart defect that results in the narrowing of the aorta and/or aortic valve. The decision to refer PAS patients for surgical or catheter-based intervention is initially based on Doppler ultrasound. VFI ...
In-Vitro Simulation Of Acute Ischemic Stroke, 2018 University of Arkansas, Fayetteville
In-Vitro Simulation Of Acute Ischemic Stroke, Paolo Garcia
Biomedical Engineering Undergraduate Honors Theses
Acute ischemic stroke (AIS) is a condition that involves the occlusion of a blood vessel within the brain, effectively preventing the passage of oxygen and nutrients. AIS is highly prevalent in the United States, where nearly 795,000 strokes happen per year and 87% of those are ischemic. From a medical standpoint, the obstructing clot can be removed with the use of a stroke retrieval device. However, a need arises for testing the aforementioned devices on a patient’s specific vascular geometries in order to increase the likelihood of a successful procedure. Outlined is a process for developing a physical ...
The Role Of Obesity And Dietary Fatty Acid Content In Regulating Humeral Bone And Cartilage Homeostasis, 2018 Washington University in St. Louis
The Role Of Obesity And Dietary Fatty Acid Content In Regulating Humeral Bone And Cartilage Homeostasis, Lauren Votava
Engineering and Applied Science Theses & Dissertations
Objective: The goal of this study was to investigate the effects of different dietary fatty acids in the context of diet-induced obesity on bone and cartilage in the humerus. It is known that obesity increases the severity of injury-induced osteoarthritis in the knee, however it is not fully understood what pathological changes have occurred due to diet alone1. Additionally, while it is known that shoulder osteoarthritis has a link to obesity, the alterations in this joint are incompletely described.
Methods: In order to examine diet-induced changes in both bone and cartilage, this research utilized mice that had been previously ...
Eigenstrain As A Mechanical Set-Point Of Cells, 2018 University of Nebraska - Lincoln
Eigenstrain As A Mechanical Set-Point Of Cells, Shengmao Lin, Marsha C. Lampi, Cynthia A. Reinhart-King, Gary C.P. Tsui, Jian Wang, Carl A. Nelson, Linxia Gu
Mechanical & Materials Engineering Faculty Publications
Cell contraction regulates how cells sense their mechanical environment. We sought to identify the set-point of cell contraction, also referred to as tensional homeostasis. In this work, bovine aortic endothelial cells (BAECs), cultured on substrates with different stiffness, were characterized using traction force microscopy (TFM). Numerical models were developed to provide insights into the mechanics of cell–substrate interactions. Cell contraction was modeled as eigenstrain which could induce isometric cell contraction without external forces. The predicted traction stresses matched well with TFM measurements. Furthermore, our numerical model provided cell stress and displacement maps for inspecting the fundamental regulating mechanism of ...
Automatic Image Processing And Conversion To Tactile Graphics, 2018 Virginia Commonwealth University
Automatic Image Processing And Conversion To Tactile Graphics, Tyler Ferro
Theses and Dissertations
Graphical information has become a critical method for portraying information for education, work and personal tasks and decisions. Unfortunately there are currently limited means of providing this information to individuals who are blind or visually impaired: alternate text is frequently missing, and accessible tactile diagrams tend to be time consuming to make and require expertise in order for them to be interpretable (which may be costly to the user and/or impossible to get). The aim of this project is to provide an accessible system to automatically generate tactile graphics for those who need to interpret information contained in visual ...
Multi-Parented End-Effectors In Optimization-Based Prediction Of Posture And Anthropometry, 2018 University of Iowa
Multi-Parented End-Effectors In Optimization-Based Prediction Of Posture And Anthropometry, Anna Seydel
University of Iowa Honors Theses
Improving motion capture processing onto a virtual model is an important research area. Although there has been significant research in this field, little work has been done to determine posture and anthropometry simultaneously with the intent of visualizing the data on virtual models. Many existing techniques are less accurate when applying processed data to a virtual model for biomechanical analysis. This paper presents a novel approach that estimates posture and anthropometry using optimization-based posture prediction to determine joint angles and link-lengths of a virtual model. By including anthropometric design variables, this approach introduces flexible handling of innate variance in subject-model ...
Senior Design I, 2018 CUNY City College
Senior Design I, Alessandra Carriero, Luis Cardoso
Open Educational Resources
No abstract provided.
Feasibility Of Using An Equilibrium Point Strategy To Control Reaching Movements Of Paralyzed Arms With Functional Electrical Stimulation, Matthew Huffman
Functional electrical stimulation (FES) is a technology capable of improving the quality of life for those with the loss of limb movement related to spinal cord injuries. Individuals with high-level tetraplegia, in particular, have lost all movement capabilities below the neck. FES has shown promise in bypassing spinal cord damage by sending electrical impulses directly to a nerve or muscle to trigger a desired function. Despite advancements in FES, full-arm reaching motions have not been achieved, leaving patients unable to perform fundamental tasks such as eating and grooming. To overcome the inability in current FES models to achieve multi-joint coordination ...
Wearable Hearing Accessory Technology, 2018 The University of Akron
Wearable Hearing Accessory Technology, Tyler Cindea, Jaime Alcorn, Brooke Draper, Kyle Glascott, Ben Hanna, Robert Thoerner
Honors Research Projects
We set out in August 2017 to develop an active noise suppressing device that would be usable both in military and civilian activities. Due to constraints in knowledge and time, we decided our best course of action was to divide the project into two equal projects with the hope to be able to combine them into a single project at the end of the allotted time. This consisted of an active noise suppression device and a passive noise suppression device. The passive device would have no electronic components and the active device would be pure circuitry with no housing. This ...
Computer-Aided Diagnoses (Cad) System: An Artificial Neural Network Approach To Mri Analysis And Diagnosis Of Alzheimer's Disease (Ad), 2017 California Polytechnic State University, San Luis Obispo
Computer-Aided Diagnoses (Cad) System: An Artificial Neural Network Approach To Mri Analysis And Diagnosis Of Alzheimer's Disease (Ad), Berizohar Padilla Cerezo
Master's Theses and Project Reports
Alzheimer’s disease (AD) is a chronic and progressive, irreversible syndrome that deteriorates the cognitive functions. Official death certificates of 2013 reported 84,767 deaths from Alzheimer’s disease, making it the 6th leading cause of death in the United States. The rate of AD is estimated to double by 2050. The neurodegeneration of AD occurs decades before symptoms of dementia are evident. Therefore, having an efficient methodology for the early and proper diagnosis can lead to more effective treatments.
Neuroimaging techniques such as magnetic resonance imaging (MRI) can detect changes in the brain of living subjects. Moreover, medical imaging ...
Sex Differences In Collateral Remodeling Following Hindlimb Arterial Occlusion, 2017 California Polytechnic State University, San Luis Obispo
Sex Differences In Collateral Remodeling Following Hindlimb Arterial Occlusion, Laura Burckhardt
Master's Theses and Project Reports
Clinical evidence indicates a higher incidence of peripheral arterial occlusive disease and associated likelihood of critical limb ischemia in women, as well as worse prognosis and decreased survival post myocardial infarction. Therefore, understanding the possible differences in underlying vascular compensation mechanisms is crucial. With arterial occlusions, necrosis and tissue injury can be naturally mitigated by the collateral circulation, improving patient prognosis. Previous sex-comparison studies describing differences in vascular remodeling are inconsistent. Therefore, the aim of this study was to describe the effect of arterial occlusion on collateral remodeling in healthy male and healthy reproductive-stage female mice. At 7 days following ...
Development Of Biomimetic Membrane Assemblies On Microspheres For High-Throughput And Multiplexable Studies, 2017 University of New Mexico
Development Of Biomimetic Membrane Assemblies On Microspheres For High-Throughput And Multiplexable Studies, Nadiezda P. Fernandez Oropeza
Biomedical Engineering ETDs
Membranes and membrane-associated components are the target of approximately 60% of the current drugs, of synthetic materials, such as polymers, which are used for drug delivery purposes and of other biomolecules, such as endotoxins, which gain entry into the cell by disrupting the membrane. Therefore, the development of biomimetic membrane assemblies allows the study of different biological processes in which cell membranes play an important role, and the characterization and screening of drug delivery tools and other membrane-bound components.
Since its development, membrane assemblies on planar silica surfaces have been the method of choice to study membrane-associated and membrane-bound components ...
Comparison Of New Metrics For Assessment Of Risks Of Occupational Noise, 2017 Southern Illinois University Carbondale
Comparison Of New Metrics For Assessment Of Risks Of Occupational Noise, Wisam Al-Dayyeni, Jun Qin
ASA Multidisciplinary Research Symposium
The acoustic environment nowadays is filled with excessive noise sources. Here, we will compare the conventional noise metrics(A-weighting and C-weighting) with our two developed advanced models (the adaptive weighting (F-weight) and the complex velocity level (CVL) auditory fatigue model).
Co-Existence Of Microbial Ecology In A Chemostat Using A Robust Feedback, 2017 Universidad Autonoma Metropolitana
Co-Existence Of Microbial Ecology In A Chemostat Using A Robust Feedback, Hector Puebla, Mariana Rodriguez-Jara, Margarita M. Gonzalez-Brambila, Eliseo Hernandez-Martinez, Alejandra Velasco-Perez, Ennio Piceno-Diaz
Annual Symposium on Biomathematics and Ecology: Education and Research
No abstract provided.