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Articles 1 - 10 of 10
Full-Text Articles in Engineering
Design Of A Physical Windkessel Model For Use In Lvad In-Vitro Benchtop Modeling, Kyle W. Beggs
Design Of A Physical Windkessel Model For Use In Lvad In-Vitro Benchtop Modeling, Kyle W. Beggs
HIM 1990-2015
Despite improved life expectancy compared to medical management alone, Ventricular Assist Device (VAD) recipients show survival rates of 80% at 12 months and 70% at 24 months. A large portion of VAD-associated mortality results from increased risk of stroke with an event frequency reported between 14-47%. Recent concerns have been raised about unprecedented increases of thrombus formation in VAD recipients with subsequent reports pointing towards implantation techniques as a critical contributor to these events. Thus, the overall prognosis with mechanical support can improve by advancing the surgeon’s approach to VAD implantation. Previous studies using Computational Fluid Dynamics (CFD) were aimed …
Effects Of Binary Solvent System On Morphology Of Particles, Patrick Besana
Effects Of Binary Solvent System On Morphology Of Particles, Patrick Besana
HIM 1990-2015
Recent advancements in cancer research has led to the synthesis of a new drug known as docetaxel. Meant to replace paclitaxel, its more natural counterpart whose ingredients are difficult to obtain, the drug is known to effectively treat a wide array of cancers, including breast cancer, ovarian cancer, and prostate cancer. The establishment of a synthetic alternative to paclitaxel has increased its bioavailability, thereby lowering the cost needed to utilize the drug. Still, the limiting factor in minimizing costs is the method in which the drug is processed. Current methods in drug processing have their limitations, which include the introduction …
Development Of A Set Of Force Response Equations To Represent The Musculature In Infants To Study Development Dysplasia Of The Hip, Brendan Jones
Development Of A Set Of Force Response Equations To Represent The Musculature In Infants To Study Development Dysplasia Of The Hip, Brendan Jones
HIM 1990-2015
This paper describes how a force response equation was created to model muscles, tendons, and ligaments of the hip joint to improve a biomechanical model of an infant hip to study Developmental Dysplasia of the Hip (DDH). DDH is the most common abnormality in newborn infants and is defined as any amount of instability in the hip including complete dislocation. Researchers at our institution are attempting to increase the success rate of treatment methods by creating computer models of the biomechanics of infant hip instability and dislocation. The computer model used a scaled adult pelvis, femur, tibia, fibula and foot …
Dynamic Response Of A Multi-Span Curved Beam From Moving Transverse Point Loads, Amanda Alexander
Dynamic Response Of A Multi-Span Curved Beam From Moving Transverse Point Loads, Amanda Alexander
HIM 1990-2015
This thesis describes how to evaluate a first-order approximation of the vibration induced on a beam that is vertically curved and experiences a moving load of non-constant velocity. The curved beam is applicable in the example of a roller coaster. The present research in the field does not consider a curved beam nor can similar research be applied to such a beam. The complexity of the vibration of a curved beam lies primarily in the description of the variable magnitude of the moving load applied. Furthermore, this motion is also variable. This thesis will present how this beam will displace …
Hybrid Carbon Fiber Alumina Nanocomposite For Non-Contact Stress Sensing Via Piezospectroscopy, Imad Hanhan
Hybrid Carbon Fiber Alumina Nanocomposite For Non-Contact Stress Sensing Via Piezospectroscopy, Imad Hanhan
HIM 1990-2015
Carbon ber composites have become popular in aerospace structures and applications due to their light weight, high strength, and high performance. Recently, scientists have begun investigating hybrid composites that include fibers and particulate fillers, since they allow for advanced tailoring of mechanical properties, such as improved fatigue life. This project investigated a hybrid carbon ber reinforced polymer (HCFRP) that includes carbon fiber and additional alumina nanoparticle fillers, which act as embedded nano stress-sensors. Utilizing the piezospectroscopic e ect, the photo-luminescent spectral signal of the embedded nanoparticles has been monitored as it changes with stress, enabling non-contact stress detection of the …
Design And Evaluation Of A Test Platform For Thermal Mechanical And Acoustical Loading, Abdi Jasmin
Design And Evaluation Of A Test Platform For Thermal Mechanical And Acoustical Loading, Abdi Jasmin
HIM 1990-2015
Next generation hypersonic cruise vehicle components will be subjected to a collection of loads not achievable in contemporary mechanical test platform. The purpose of this thesis is to demonstrate the design of a unique test platform for combined extreme environment (P-CEEn) needed to replicate thermal, acoustic and mechanical loading to be imparted on hypersonic fuselage panels. The panels are typically subjected to super-imposed cycling from hypersonic shock/impingement and aerodynamic pressure from the usual ascent-cruise-decent motion of the aircrafts combined with mechanical vibration at acoustic frequencies; moreover, these slender components will undergo conventional mechanical fatigue with compressive mean stress due to …
Frequency-Domain Faraday Rotation Spectroscopy (Fd-Frs) For Functionalized Particle And Biomolecule Characterization, Richard Murdock
Frequency-Domain Faraday Rotation Spectroscopy (Fd-Frs) For Functionalized Particle And Biomolecule Characterization, Richard Murdock
HIM 1990-2015
In this study, the magnetically-induced vibrations of functionalized magnetic particle suspensions were probed for the development of a novel optical spectroscopy technique. Through this work (1) the frequency-dependence of the faraday rotation in ferrofluids and (2) the extension of this system to elucidating particle size and conformation as an alternative immunossay to costly and labor/time intensive Western Blotting and ELISA has been shown. With its sensitivity and specificity, this method has proven to be a promising multi-functional tool in biosensing, diagnostic, and therapeutic nanomedicine efforts. Due to its ubiquitous nature in all optically-transparent materials, the farady rotation, or circular birefringence, …
Understanding And Modeling Pathways To Thrombosis, John Seligson
Understanding And Modeling Pathways To Thrombosis, John Seligson
HIM 1990-2015
This research will investigate techniques to create a sensor that is responsive to methane at 23°C. The approach will use the integration of a very thin film, which changes its resistive properties when methane gas is applied, deposited atop the surface of a piezoelectric substrate. An aluminum thin film interdigital transducer will launch a surface acoustic wave (SAW) that travels under the sensor’s gas-sensitive resistive thin film. The SAW/resistive film interaction changes the SAW amplitude, phase and delay. For this work, three films, tin dioxide (SnO2), zinc oxide (ZnO) and palladium (Pd) [1, 2] will be studied. Gas detection will …
A Mechanics-Based Approach For Putt Distance Optimization, Pascual Santiago-Martinez
A Mechanics-Based Approach For Putt Distance Optimization, Pascual Santiago-Martinez
HIM 1990-2015
Quantifying the core mechanics of putting is imperative to developing a reliable model that predicts post-collision ball behavior. A preliminary model for the stroking motion of putting and putter-ball collision is developed alongside experiments, establishing an empirical model that supports the theory. The goal of the present study is to develop a correlation between the backstroke of a putt, or the pre-impact translation of the putter, and the post-impact displacement of the golf ball. This correlation is subsequently utilized to generate an algorithm that predicts the two-dimensional ball trajectory based on putt displacement and putting surface texture by means of …
Compendium Of Thermoviscoplasticity Modeling Parameters For Materials Under Non-Isothermal Fatigue, Nathan O'Nora
Compendium Of Thermoviscoplasticity Modeling Parameters For Materials Under Non-Isothermal Fatigue, Nathan O'Nora
HIM 1990-2015
Viscoplasticity models allow for the prediction of the inelastic behavior of materials, taking into account the rate-dependence. In order to model the response under non-isothermal conditions experienced by many components, such as those in turbomachinery, however, it is necessary to incorporate temperature-dependence. Additionally, for materials subjected to thermal shock, temperature rate-dependence is also important. The purpose of this research is to develop a method of determining Chaboche viscoplasticity parameters that allows for consistent behavior with changing temperature. A quartet of candidate materials, 304 stainless steel, IN617, DS GTD-111, and Ti6242S, were chosen for their applications in turbomachinery, such as gas …