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Biomedical Engineering and Bioengineering Commons™
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Articles 61 - 90 of 128
Full-Text Articles in Biomedical Engineering and Bioengineering
Simulation Of Cu Precipitation In Fe-Cu Dilute Alloys With Cluster Mobility, Senlin Cui, Mahmood Mamivand, Dane Morgan
Simulation Of Cu Precipitation In Fe-Cu Dilute Alloys With Cluster Mobility, Senlin Cui, Mahmood Mamivand, Dane Morgan
Mechanical and Biomedical Engineering Faculty Publications and Presentations
Cu-rich precipitates formation is associated with the precipitation hardening of Fe-Cu based steels and the embrittlement of reactor pressure vessel steels under neutron irradiation. The accurate modeling of the time evolution of Cu-rich precipitates is therefore of fundamental importance for the design of Fe-Cu based steels and the prediction of the irradiation induced shift of the ductile to brittle transition temperature of reactor pressure vessels. This work applies cluster dynamics with mobile Cu monomers and clusters to model Cu precipitation in dilute Fe-Cu alloys at several temperatures. Optimized model parameters can be used to simulate the mean radius, number density, …
Heating Performance Analysis For Short-Term Energy Monitoring And Prediction Using Multi-Family Residential Energy Consumption Data, Sukjoon Oh, Chul Kim, Joonghyeok Heo, Sung Lok Do, Kee Han Kim
Heating Performance Analysis For Short-Term Energy Monitoring And Prediction Using Multi-Family Residential Energy Consumption Data, Sukjoon Oh, Chul Kim, Joonghyeok Heo, Sung Lok Do, Kee Han Kim
Mechanical and Biomedical Engineering Faculty Publications and Presentations
Many smart apartments and renovated residential buildings have installed Smart Meters (SMs), which collect interval data to accelerate more efficient energy management in multi-family residential buildings. SMs are widely used for electricity, but many utility companies have been working on systems for natural gas and water monitoring to be included in SMs. In this study, we analyze heating energy use data obtained from SMs for short-term monitoring and annual predictions using change-point models for the coefficient checking method. It was found that 9-month periods were required to search the best short-term heating energy monitoring periods when non-weather-related and weather-related heating …
Concentrating Photovoltaic Retrofit For Existing Parabolic Trough Solar Collectors: Design, Experiments, And Levelized Cost Of Electricity, Todd P. Otanicar, Rhetta Wingert, Matthew Orosz, Clay Mcpheeters
Concentrating Photovoltaic Retrofit For Existing Parabolic Trough Solar Collectors: Design, Experiments, And Levelized Cost Of Electricity, Todd P. Otanicar, Rhetta Wingert, Matthew Orosz, Clay Mcpheeters
Mechanical and Biomedical Engineering Faculty Publications and Presentations
Photovoltaics and concentrating solar thermal power are two ways for generating electricity from sunlight, albeit through different methods. Parabolic trough style powerplants represent 3.6 GW of electricity production, but many of these plants are aging and being replaced with photovoltaics. An alternative option that could be employed to leverage the sunk capital cost associated with the primary optics would be the design of a pure photovoltaic retrofit working within the existing plant architecture. Here, a secondary optical concentrator is designed to use the existing primary optics of a parabolic trough type solar thermal powerplant. The design is a v-shaped secondary …
Low Intensity Vibrations Restore Nuclear Yap Levels And Acute Yap Nuclear Shuttling In Mesenchymal Stem Cells Subjected To Simulated Microgravity, Matt Thompson
Boise State University Theses and Dissertations
The bone deterioration that astronauts experience in microgravity environments is known to occur in response to the lack of gravity-based tissue stress. Mechanical forces are crucial to maintain healthy bone mass by regulating the function of bone-making osteoblasts as well as the proliferation and differentiation of their progenitors, mesenchymal stem cells (MSC) which replenish osteoblastic cells. Regulation of proliferative function of MSCs in response to mechanical force is in part controlled by the “mechanotransducer” protein YAP (Yes-associated protein) which is shuttled into the nucleus in response to mechanical challenge to induce gene expression necessary for cell proliferation. Our group had …
Computational Approach To Correcting Joint Instability In Patients With Recurrent Patellar Dislocation, Oliver Alvarez, Robert N. Steensen, Paul J. Rullkoetter, Clare K. Fitzpatrick
Computational Approach To Correcting Joint Instability In Patients With Recurrent Patellar Dislocation, Oliver Alvarez, Robert N. Steensen, Paul J. Rullkoetter, Clare K. Fitzpatrick
Mechanical and Biomedical Engineering Faculty Publications and Presentations
Patellar dislocation is a debilitating injury common in active adolescents and young adults. Conservative treatment after initial dislocation is often recommended, but almost half of these patients continue to suffer from recurrent dislocation. The objective of this study was to compare preoperative patellofemoral joint stability with stability after a series of simulated procedures, including restorative surgery to correct to pre-injury state, generic tibial tubercle osteotomy, patient-specific reconstructive surgery to correct anatomic abnormality, less invasive patient-specific surgery, and equivalent healthy controls. Three-dimensional, subject-specific finite element models of the patellofemoral joint were developed for 28 patients with recurrent patellar dislocation. A …
Review Of Living Learning Communities And Their Impact On First Year Engineering College Students, Samantha Schauer, Krishna Pakala, Kim M.B. Tucker
Review Of Living Learning Communities And Their Impact On First Year Engineering College Students, Samantha Schauer, Krishna Pakala, Kim M.B. Tucker
Mechanical and Biomedical Engineering Faculty Publications and Presentations
Traditionally, first-year college students do not have a community of like-minded peers with whom they are able to learn. Adding to first-year engineering college students’ (FYECS) struggles is the fact that many students do not have a mentor in their related field and are unable to start building their professional repertoire, network, and/or practical skills. Living Learning Communities (LLC) can offer a platform for postsecondary institutions to increase recruitment, engagement, and sense of belonging for students who live in an LLC. LLCs have been described in the literature as themed living and learning communities where students take a common course(s), …
A Mobile Learning Community In A Living Learning Community: Perceived Impact On Digital Fluency And Communication, Devshikha Bose, Krishna Pakala, Lana Grover
A Mobile Learning Community In A Living Learning Community: Perceived Impact On Digital Fluency And Communication, Devshikha Bose, Krishna Pakala, Lana Grover
Mechanical and Biomedical Engineering Faculty Publications and Presentations
Though mobile devices like smartphones, tablets, and tablet computers have an immense potential for improving student learning, there is little empirical research which reports ways in which students actually use these technologies for learning, especially in fields like Engineering. Based on a social-constructivist approach to learning, the purpose of this mixed methods study was to investigate student perceptions regarding changes in mobile device based digital fluency and communication, after participation in a Living Learning Community (LLC) based Mobile Learning Community. This study contributes to existing literature in the field in that it reports student perceptions of how mobile devices can …
Fuzzy Controller Algorithm For Automated Hvac Control, M. Chae, K. Kang, D. Koo, S. Oh, Jae Youl Chun
Fuzzy Controller Algorithm For Automated Hvac Control, M. Chae, K. Kang, D. Koo, S. Oh, Jae Youl Chun
Mechanical and Biomedical Engineering Faculty Publications and Presentations
This research presents the design framework of the artificial intelligent algorithm for an automated building management system. The AI system uses wireless sensor data or IoT (Internet of Things) and user's feedback together. The wireless sensors collect data such as temperature (indoor and outdoor), humidity, light, user occupancy of the facility, and Volatile Organic Compounds (VOC) which is known as the source of the Sick Building Syndrome (SBS) or New Building Syndrome because VOC are often found in new buildings or old buildings with new interior improvement and they can be controlled and reduced by appropriate ventilation efforts. The collected …
Controlling Strain Energy Density In 3d Cellular Collagen Constructs During Complex Loads, Katherine Hollar
Controlling Strain Energy Density In 3d Cellular Collagen Constructs During Complex Loads, Katherine Hollar
Boise State University Theses and Dissertations
Mechanical stimulation applied to damaged soft tissues, such as ligament, can promote tissue remodeling to accelerate healing. To help identify treatments that encourage ligament healing, bioreactors have been designed to subject 3D cellularized constructs to various loading conditions in order to determine the mechanical mechanisms that trigger cell-mediated repair. An innovative approach is to use a bioreactor to apply controlled states of biaxial stress to study the effects of strain energy density and distortion energy on cell activity. Tissue distortion has been linked to changes in the structure and function of ligament, yet the specific impact of distortion energy on …
Effect Of Corrective Surgery On Lower Limb Mechanics In Patients With Crouch Gait, Adelle Milholland
Effect Of Corrective Surgery On Lower Limb Mechanics In Patients With Crouch Gait, Adelle Milholland
Boise State University Theses and Dissertations
Crouch gait a progressively degrading gait deviation associated with the neurological disorder cerebral palsy. If left untreated it can lead to anterior knee pain and a loss of ambulation. At present there exists no agreed upon metric for determining the surgical procedures used to treat crouch gait and there is insufficient means to analytically compare the results of different procedures. The aims of this thesis work were to create a pipeline to transform a patient’s gait analysis data into a finite element model, develop a model of sufficient complexity to evaluate a range of outcomes by which to judge the …
The Effect Of Implant Conformity On Muscle Force Requirements In The Implanted Knee, Grace Mcconnochie
The Effect Of Implant Conformity On Muscle Force Requirements In The Implanted Knee, Grace Mcconnochie
Boise State University Theses and Dissertations
Implant geometry is a significant factor in determining knee stability and patient satisfaction following total knee replacement (TKR). Ineffective muscle recruitment, impaired joint functionality and increased implant wear are consequences of an unstable knee replacement. Current knee laxity evaluation techniques are limited in their ability to account for the muscular response to knee instability. This study utilizes a subject specific lower-body musculoskeletal finite element (FE) model with dynamic muscle loading to evaluate implant laxity during activities of daily living. The effect of varying implant conformity on the muscle forces required to maintain a target kinematic profile during simulated laxity testing …
Development Of A Statistical Shape-Function Model Of The Implanted Knee For Real-Time Prediction Of Joint Mechanics, Kalin Gibbons
Development Of A Statistical Shape-Function Model Of The Implanted Knee For Real-Time Prediction Of Joint Mechanics, Kalin Gibbons
Boise State University Theses and Dissertations
Outcomes of total knee arthroplasty (TKA) are dependent on surgical technique, patient variability, and implant design. Non-optimal design or alignment choices may result in undesirable contact mechanics and joint kinematics, including poor joint alignment, instability, and reduced range of motion. Implant design and surgical alignment are modifiable factors with potential to improve patient outcomes, and there is a need for robust implant designs that can accommodate patient variability. Our objective was to develop a statistical shape-function model (SFM) of a posterior stabilized implant knee to instantaneously predict output mechanics in an efficient manner. Finite element methods were combined with Latin …
Happy Hours Are A Godsend, Krishna Pakala, Diana Bairaktarova, Samantha Schauer
Happy Hours Are A Godsend, Krishna Pakala, Diana Bairaktarova, Samantha Schauer
Mechanical and Biomedical Engineering Faculty Publications and Presentations
Office hours that happen in a virtual environment are called virtual office hours. This type of student-faculty interaction can be easily hosted from a faculty computer/mobile device/tablet. With an invitation, students can login to the online session and join their instructor and peers in a virtual space. Using mobile technologies, students can join virtual office hours from a variety of locations including a library, outdoors, on a commute ride home, while caring for children, eating dinner, and even while grocery shopping. Virtual office hours allow for more flexibility of student-faculty interaction. They are an alternative to traditional office hours. This …
Work In Progress: First-Year Engineering College Students: Value Created From Participating In A Living/Learning Community, Krishna Pakala, Kim M.B. Tucker, Samantha Schauer
Work In Progress: First-Year Engineering College Students: Value Created From Participating In A Living/Learning Community, Krishna Pakala, Kim M.B. Tucker, Samantha Schauer
Mechanical and Biomedical Engineering Faculty Publications and Presentations
This Work in Progress paper examines how to capture the perceived value obtained from firstyear engineering college students (FYECS) from participating in the Engineering and Innovation Residential College (EIRC), a living learning community (LLC). People are social by nature and thrive through collaborating and living with others who share similar passions; however, oftentimes FYECS do not have a community of like-minded peers where support, innovation, discourse, and collaboration can take place. Adding to FYECS struggles is the fact that many do not have a mentor in their related field and are unable to start building their professional repertoire, network, technical …
Review Of Educational Technology: Closing The Gap Between Modern Technology And The College Engineering Classroom, David Pinkerton, Krishna Pakala
Review Of Educational Technology: Closing The Gap Between Modern Technology And The College Engineering Classroom, David Pinkerton, Krishna Pakala
Mechanical and Biomedical Engineering Faculty Publications and Presentations
This paper aggregates information from past and current studies regarding the implementation of technology in engineering classrooms and identifies the most promising ideas, technologies, and techniques. This paper provides insight into best practices for implementing technologies to improve the education of engineering students. This paper provides recommendations to adopt non-traditional teaching methods. Educational tools and techniques are evaluated on the basis of: Adoption and Assimilation, Access, Community, Intellectual Presence, Student Perception, and Development of Social and Professional Skills. Best practices are highlighted with descriptions of the technologies and techniques that were found most promising.
Recovery Of Stem Cell Proliferation By Low Intensity Vibration Under Simulated Microgravity Requires Linc Complex, H. Touchstone, R. Bryd, S. Loisate, M. Thompson, X. Pu, R. Beard, J. T. Oxford, G. Uzer
Recovery Of Stem Cell Proliferation By Low Intensity Vibration Under Simulated Microgravity Requires Linc Complex, H. Touchstone, R. Bryd, S. Loisate, M. Thompson, X. Pu, R. Beard, J. T. Oxford, G. Uzer
Mechanical and Biomedical Engineering Faculty Publications and Presentations
Mesenchymal stem cells (MSC) rely on their ability to integrate physical and spatial signals at load bearing sites to replace and renew musculoskeletal tissues. Designed to mimic unloading experienced during spaceflight, preclinical unloading and simulated microgravity models show that alteration of gravitational loading limits proliferative activity of stem cells. Emerging evidence indicates that this loss of proliferation may be linked to loss of cellular cytoskeleton and contractility. Low intensity vibration (LIV) is an exercise mimetic that promotes proliferation and differentiation of MSCs by enhancing cell structure. Here, we asked whether application of LIV could restore the reduced proliferative capacity seen …
Nonprehensile Manipulation Of Deformable Objects: Achievements And Perspectives From The Rodyman Project, Aykut C. Satici
Nonprehensile Manipulation Of Deformable Objects: Achievements And Perspectives From The Rodyman Project, Aykut C. Satici
Mechanical and Biomedical Engineering Faculty Publications and Presentations
The goal of this work is to disseminate the results achieved so far within the RODYMAN project related to planning and control strategies for robotic nonprehensile manipulation. The project aims at advancing the state of the art of nonprehensile dynamic manipulation of rigid and deformable objects to future enhance the possibility of employing robots in anthropic environments. The final demonstrator of the RODYMAN project will be an autonomous pizza maker. This article is a milestone to highlight the lessons learned so far and pave the way towards future research directions and critical discussions.
Studying The Applicability Of Biostimulated Calcite Precipitation In Stabilizing Expansive Soils, Md Touhidul Islam
Studying The Applicability Of Biostimulated Calcite Precipitation In Stabilizing Expansive Soils, Md Touhidul Islam
Boise State University Theses and Dissertations
Of the four types of soils, clays are often associated with issues related to low bearing capacity, high compressibility, swelling and shrinking nature. For example, expansive soils swell and shrink with moisture ingress and digress and are prevalent in several parts of the world causing billions of dollars in damages annually to various civil infrastructures. Several ground improvement techniques such as chemical stabilization, deep soil mixing, moisture barriers, and others were employed to counteract these soils. However, these methods are impractical in certain situations and unsustainable in others due to their economic and environmental impacts. Microbiological treatment of soils could …
Sex Differences In Lower Limb Biomechanics During A Single-Leg Cut With Body Borne Load, Auralea Carylon Fain
Sex Differences In Lower Limb Biomechanics During A Single-Leg Cut With Body Borne Load, Auralea Carylon Fain
Boise State University Theses and Dissertations
Introduction: Musculoskeletal injuries are ever-increasing in military personnel, particularly females. These musculoskeletal injuries are attributed to adaptations in lower limb biomechanics while performing routine military tasks, such as a single-leg cut, with the addition of body borne load. However, it is unknown if females and males exhibit similar lower limb biomechanics with the addition of body borne load during these tasks. This study sought to compare the lower limb biomechanical adaptations exhibited by females and males performing a single-leg cut with body borne load. Methods: Eleven females and 17 males had lower limb biomechanics quantified during a single-leg cut with …
Effects Of Stride Length On Lower Limb Stiffness When Running With Body Borne Load, Nick Lobb
Effects Of Stride Length On Lower Limb Stiffness When Running With Body Borne Load, Nick Lobb
Boise State University Theses and Dissertations
Introduction: During military activities, soldiers are often required to run at a fixed cadence with body borne load, but these loads purportedly increase leg stiffness, leading to increased risk of musculoskeletal injury. Yet, to date, it is unknown how altering stride length when running with body borne load affects lower limb stiffness for males and females. Purpose: To quantify leg stiffness, and lower limb joint (hip, knee and ankle) stiffness for males and females using different stride lengths to run with body borne loads of 20 kg, 25 kg, 30 kg, and 35 kg. Methods: Twenty-seven (17 males and 10 …
Enucleated Cells Reveal Differential Roles Of The Nucleus In Cell Migration, Polarity, And Mechanotransduction, Gunes Uzer
Mechanical and Biomedical Engineering Faculty Publications and Presentations
The nucleus has long been postulated to play a critical physical role during cell polarization and migration, but that role has not been defined or rigorously tested. Here, we enucleated cells to test the physical necessity of the nucleus during cell polarization and directed migration. Using enucleated mammalian cells (cytoplasts), we found that polarity establishment and cell migration in one dimension (1D) and two dimensions (2D) occur without the nucleus. Cytoplasts directionally migrate toward soluble (chemotaxis) and surface-bound (haptotaxis) extracellular cues and migrate collectively in scratch-wound assays. Consistent with previous studies, migration in 3D environments was dependent on the nucleus. …
Waste Heat Recovery From Distributed Rack-Based Fuel Cells Using Thermoelectric Generators, Khosrow Ebrahimi, Alfonso Ortega, Calvin Li, Kazuaki Yazawa, Sean James
Waste Heat Recovery From Distributed Rack-Based Fuel Cells Using Thermoelectric Generators, Khosrow Ebrahimi, Alfonso Ortega, Calvin Li, Kazuaki Yazawa, Sean James
Mechanical and Biomedical Engineering Faculty Publications and Presentations
Off-grid power generation has been demonstrated in data centers through the deployment of site-specific centralized power plants utilizing gas turbine or fuel cell-based power generation. Because power is centrally generated, power distribution requires a high voltage power grid within the data center with its ancillary storage and conditioning requirements and equipment. An alternative approach is a completely decentralized distributed power generation system in which fuel cells deployed within individual server racks provide power localized to that rack only. Among other advantages, such an approach also greatly increases the ability to modulate and control power to individual rack units. Because the …
Development Of In-Vitro And In-Vivo Devices To Study The Mechanobiology Of Ligament Healing, John Bayard Everingham
Development Of In-Vitro And In-Vivo Devices To Study The Mechanobiology Of Ligament Healing, John Bayard Everingham
Boise State University Theses and Dissertations
Ligament injuries are the most common sports injury in the United States. The current clinical practice for treating ligament injuries leaves many patients with significant pain and joint laxity for years following the initial injury. Controlled mechanical stimulation of the tissue after injury is necessary for robust healing, but the optimal mechanical environment for ligament healing is not fully understood. Alternative therapies, such as instrument assisted soft tissue mobilization (IASTM), offer a form of mechanical stimulation that is non-invasive and has shown promising clinical outcomes but the optimal dosage for IASTM treatments is unknown. The objective of this study was …
Optical Properties Of Organic Carbon And Soot Produced In An Inverse Diffusion Flame, C. Russo, B. Apicella, J. S. Lighty, A. Ciajolo, A. Tregrossi
Optical Properties Of Organic Carbon And Soot Produced In An Inverse Diffusion Flame, C. Russo, B. Apicella, J. S. Lighty, A. Ciajolo, A. Tregrossi
Mechanical and Biomedical Engineering Faculty Publications and Presentations
The carbonaceous matter (soot plus organic carbon) sampled downstream of an ethylene inverse diffusion flame (IDF) was chemically and spectroscopically analyzed in detail. In particular, the H/C ratio, the UV-Visible absorption coefficient and Raman parameters were measured and found to be representative of a highly disordered sp2 -rich carbon as the early soot sampled in a premixed flame. In contrast, the optical band gap was found to be relatively low (0.7eV), closer to the optical band gap of graphite than to that of medium-sized polycyclic aromatic hydrocarbons (>2eV) which are widely considered to be soot precursors and are …
Direct Numerical Simulation Of Turbulent Katabatic Slope Flows With An Immersed-Boundary Method, Clancy Umphrey, Ray Deleon, Inanc Senocak
Direct Numerical Simulation Of Turbulent Katabatic Slope Flows With An Immersed-Boundary Method, Clancy Umphrey, Ray Deleon, Inanc Senocak
Mechanical and Biomedical Engineering Faculty Publications and Presentations
We investigate a Cartesian-mesh immersed-boundary formulation within an incompressible flow solver to simulate laminar and turbulent katabatic slope flows. As a proof-of-concept study, we consider four different immersed-boundary reconstruction schemes for imposing a Neumann-type boundary condition on the buoyancy field. Prandtl’s laminar solution is used to demonstrate the second-order accuracy of the numerical solutions globally. Direct numerical simulation of a turbulent katabatic flow is then performed to investigate the applicability of the proposed schemes in the turbulent regime by analyzing both first- and second-order statistics of turbulence. First-order statistics show that turbulent katabatic flow simulations are noticeably sensitive to the …
Dynamic Rating Of Overhead Transmission Lines Over Complex Terrain Using A Large-Eddy Simulation Paradigm, Tyler Phillips, Ray Deleon, Inanc Senocak
Dynamic Rating Of Overhead Transmission Lines Over Complex Terrain Using A Large-Eddy Simulation Paradigm, Tyler Phillips, Ray Deleon, Inanc Senocak
Mechanical and Biomedical Engineering Faculty Publications and Presentations
Dynamic Line Rating (DLR) enables rating of power line conductors using real-time weather conditions. Conductors are typically operated based on a conservative static rating that assumes worst case weather conditions to avoid line sagging to unsafe levels. Static ratings can cause unnecessary congestion on transmission lines. To address this potential issue, a simulation-based dynamic line rating approach is applied to an area with moderately complex terrain. A micro-scale wind solver — accelerated on multiple graphics processing units (GPUs) — is deployed to compute wind speed and direction in the vicinity of powerlines. The wind solver adopts the large-eddy simulation technique …
Detection Of Structural Bolt Detorquing Using Direct Stethoscope Measurement, Joe Guarino, Robert Hamilton
Detection Of Structural Bolt Detorquing Using Direct Stethoscope Measurement, Joe Guarino, Robert Hamilton
Mechanical and Biomedical Engineering Faculty Publications and Presentations
A method for detecting loosened bolts in a structural joint based upon open-loop acoustic measurement is presented. The acoustic measurement is taken directly on the bolt head. The response of the bolt to a proximal hammer impact is evaluated and characterized using wavelet decomposition of the signal measured from the bolt head. Data were also taken from an accelerometer mounted longitudinally and transversely on the bolt head. Results from the stethoscope and the accelerometer are presented from a set of structural bolts in several conditions of preload and looseness. A stethoscope applied to the loose bolt and a proximal bolt …
A Validated Software Application To Measure Fiber Organization In Soft Tissue, Erica E. Morrill, Azamat N. Tulepbergenov, Christina J. Stender, Roshani Lamichhane, Raquel J. Brown, Trevor J. Lujan
A Validated Software Application To Measure Fiber Organization In Soft Tissue, Erica E. Morrill, Azamat N. Tulepbergenov, Christina J. Stender, Roshani Lamichhane, Raquel J. Brown, Trevor J. Lujan
Mechanical and Biomedical Engineering Faculty Publications and Presentations
The mechanical behavior of soft connective tissue is governed by a dense network of fibrillar proteins in the extracellular matrix. Characterization of this fibrous network requires the accurate extraction of descriptive structural parameters from imaging data, including fiber dispersion and mean fiber orientation. Common methods to quantify fiber parameters include fast Fourier transforms (FFT) and structure tensors, however, information is limited on the accuracy of these methods. In this study, we compared these two methods using test images of fiber networks with varying topology. The FFT method with a band-pass filter was the most accurate, with an error of 0.71 …
Bi-Directional Fatigue Life Behavior Of Bovine Meniscus, Jaremy Creechley
Bi-Directional Fatigue Life Behavior Of Bovine Meniscus, Jaremy Creechley
Boise State University Theses and Dissertations
Meniscal injuries due to tissue tearing are prevalent in the U.S. yet the failure behavior of the meniscus is poorly understood. Clinical studies indicate that fatigue failure causes many of these tears. The highly circumferentially aligned fibers result in transversely isotropic material properties. Tears preferentially align bi-directionally to the fiber orientation. The aim of this study is to present the bi-directional fatigue life behavior of meniscal fibrocartilage. A novel fatigue life approach was developed to achieve this aim. Forty-eight bovine specimens were subjected to cyclic sinusoidal tension-tension stress at 2 Hz until rupture. Normalized peak tensile stresses were determined at …
Analog Spiking Neuromorphic Circuits And Systems For Brain- And Nanotechnology-Inspired Cognitive Computing, Xinyu Wu
Boise State University Theses and Dissertations
Human society is now facing grand challenges to satisfy the growing demand for computing power, at the same time, sustain energy consumption. By the end of CMOS technology scaling, innovations are required to tackle the challenges in a radically different way. Inspired by the emerging understanding of the computing occurring in a brain and nanotechnology-enabled biological plausible synaptic plasticity, neuromorphic computing architectures are being investigated. Such a neuromorphic chip that combines CMOS analog spiking neurons and nanoscale resistive random-access memory (RRAM) using as electronics synapses can provide massive neural network parallelism, high density and online learning capability, and hence, paves …