Digital Commons Network^™

Nonlinear Direct Torque Control Of Interior Permanent Magnet Synchronous Motor Drive, Jackson Justo

Tanzania Journal of Engineering and Technology (TJET)

This paper presents a nonlinear direct torque control (NDTC) strategy of interior permanent magnet synchronous motors (IPMSMs) for electric vehicle (EV) propulsion. The proposed NDTC scheme applies a nonlinear model of IPMSM to dynamically determine the optimal switching states that optimize the EV drivers’ decision to reduce the workload. Moreover, the proposed NDTC method has a simple control structure and can explicitly handle system constraints and nonlinearities. The performance evaluation is conducted via a prototype IPMSM test-bed with a TMS320F28335 DSP. Comparative experimental results provide the evidence of improvements of the proposed NDTC strategy over the conventional DTC strategy by …

Afro-Latinx Online Communities: Creating Connections Through Social Action., Rita Damiron Tallaj

Seton Hall University Dissertations and Theses (ETDs)

Considering the power of online media to create communities, this thesis examines how the power of social media is harnessed by the Afro-Latinx individuals to mobilize and call to actions those who identify under the same social category and create a powerful online community to come together in support and advocacy virtually. Through a digital ethnography, this research observes three Instagram pages and performs a textual analysis on 3 posts to further understand the Afro-Latinx community and their adoption of Instagram to create online communities. Find-ings emphasize the importance of creating and maintaining a niche, user engagement and mem-ber satisfaction

A Tale Of Two Books: The Relationship Between John Harvey Kellogg’S Living Temple And Ellen G. White’S Ministry Of Healing, Thomas Rasmussen

Andrews University Seminary Student Journal

In contemporary society John H. Kellogg is more known for his medical inventions, than he is for the book The Living Temple, which was published in 1903. However, within Adventism the name Kellogg denotes crisis and controversy. The thesis of this paper is that Ellen White responded to the Kellogg’s publication in three ways: personally—to John Kellogg; prophetically—to the Seventh-day Adventist Church; and publicly—with the book The Ministry of Healing, which was published two years later in 1905. It is the public response that is of primary interest to this paper. Ellen White wrote many personal letters to Kellogg leading …

Computer Vision Machine Learning And Future-Oriented Ethics, Abagayle Lee Blank

Honors Projects

Computer Vision Machine Learning (CVML) in the application of facial recognition is currently being researched, developed, and deployed across the world. It is of interest to governments, technology companies, and consumers. However, fundamental issues remain related to human rights, error rates, and bias. These issues have the potential to create societal backlash towards the technology which could limit its benefits as well as harm people in the process. To develop facial recognition technology that will be beneficial to society in and beyond the next decade, society must put ethics at the forefront. Drawing on AI4People’s adaption of bioethics for AI, …

Cardiovascular Changes During Dialogue, Patricia Liehr

Dissertations

This study was designed to explore the experience of listening, noting how listening was distinct from talking and from silence. There was interest in the potential for listening to engender lowered physiological arousal. Listening was defined within an interpersonal context, as one person listened to another tell a story. Clinical experience has demonstrated that persons who are listening to a clinician share a story often relax. Psychophysiological measures were used to assess the experience of listening. Cardiovascular parameters (mean arterial pressure, systolic blood pressure, diastolic blood pressure, heart rate, skin temperature) and eye contact (videotaped data) were measured during listening. …

Mitochondrial Activity And Skeletal Muscle Insulin Resistance In Kidney Disease, Jane E. Carré, C Affourtit

School of Biomedical Sciences

Insulin resistance is a key feature of the metabolic syndrome, a cluster of medical disorders that together increase the chance of developing type 2 diabetes and cardiovascular disease. In turn, type 2 diabetes may cause complications such as diabetic kidney disease (DKD). Obesity is a major risk factor for developing systemic insulin resistance, and skeletal muscle is the first tissue in susceptible individuals to lose its insulin responsiveness. Interestingly, lean individuals are not immune to insulin resistance either. Non-obese, non-diabetic subjects with chronic kidney disease (CKD), for example, exhibit insulin resistance at the very onset of CKD, even before clinical …

Influence Of Hydration Status On Running Performance And Makers Of Psychological And Physiological Stress In High School Cross Country Runners, Joshua Granger

LSU Master's Theses

Adequate hydration is an important attribute to an individual’s health and wellbeing. This is highlighted in athletic populations, who are at great risk for hypohydration, regardless of age, sex, and sport. The rampant hypohydration observed in athletes is present at all levels of competition, from professional athletes, with access to substantial monetary and nutrition support to division 3 and recreational athletes who often face monetary challenges. This trend continues to trickle down to lower levels of competition, such as high school, where athletes often practice and compete in dehydrated states. Practicing in these hypohydrated states can cause health issues such …

Design For Sustainable Entangled Human-Nature Systems, Emīlija Veselova

Nordes Conference Series

Humanity must rapidly transition towards sustainable futures. Reaching planetary sustainability requires care for nature and radical transformation of human-made systems. Human and natural systems co-exist in extensive, complex, multi-layered entanglement. Design for sustainability and, ultimately, all design, will need to be transformed towards design for sustainable entangled human-nature systems. This paper outlines six developments to support this transformation. It suggests that all design projects must (1) be viewed as interlinked to human-nature systems and their sustainability, (2) include natural systems and entities as key stakeholders, and (3) include transdisciplinary perspectives on the entangled systems and sustainability. Moreover, design could adopt …

Why Care About Virtual Landscapes? Immersive Open World Gaming Related To Positive Health, Paul Roncken

Nordes Conference Series

For some reason many people enjoy, spend long hours and pay for being out on virtual fields, playing an avatar that needs to hunt, prey, hide, survive and interact with all kinds of programmed entities and online players. Surely the designers and programmers deserve praise for their efforts and achievements in yearly progress on more detailed and increasingly immersive virtual experiences. But does that suffice to care about virtual landscapes other than classifying them as artificial places for fun and diversion? In this paper I will make a first attempt to relate virtual landscape experiences to accumulated insights in environmental …

A Paper-Based Elisa Device For The Rapid Detection Of Ischemic Stroke, Andrea Larsen

Baker/Koob Endowments Awarded Projects

Diagnosing an ischemic stroke accurately and quickly is essential for appropriate treatment and results in more effective management of the stroke, leading to better patient outcomes. Specifically, the determination of ischemic versus hemorrhagic stroke leads to critically different treatment paths, which would be potentially fatal if administered incorrectly. Currently, ischemic strokes are diagnosed through a series of tests, including a physical examination, CT scans, and a panel of blood tests to exclude hemorrhagic stroke or other similarly presenting conditions, in order to administer tPA (the main treatment) within the three hour window. The discovery of biomarkers, molecules which are upregulated …

Effects Of Life-Long Wheel Running Behavior On Plantar Flexor Contractile Properties, Alexander Nicholas Beechko

Electronic Theses, Projects, and Dissertations

Aging in skeletal muscle is characterized by a loss in muscular performance. This is in part related to the direct loss of muscle mass due to senescence, known as sarcopenia. With age, skeletal muscles lose force production, contractile speed, and power production. The force velocity relationship of muscle is a product of force production and contraction speed, both of which decline with age; however, the mechanisms and trajectory of this decline are not well understood. Exercise has positive effects on muscle, and thus may assist in maintaining performance in old age. However, few long-term studies have been performed to examine …

Agency And Creativity: An Eye On Gender Identity In Four Egyptian Novels, Maha Mosalem

Theses and Dissertations

For most scholars, agency is a term that has most traditionally been coined with free will, resistance, and intentionality (Giddens, 1979; Ahearn, 2001). In this study, however, the construct is examined from a linguistic perspective aiming at exploring its creative dimensions in relation to gender identity in four Egyptian novels; Bayna ʔal-qaṣrayn (Palace Walk), ʔal-Bāb ʔal-maftūḥ (The Open Door), ʔu:ri:du rajulan (I Need a Man), and ʃaġaf (Passion). By adopting a mediated discourse analysis approach (MDA) (Scollon, 2002), this study examined the connections between discourse and action in social interactions. Using the grammatical, semantic, and discursive analysis, the examination focused …

International Comparison Of The Levels And Potential Correlates Of Objectively Measured Sedentary Time And Physical Activity Among Three-To-Four-Year-Old Children, Kaiseree I. Dias, James White, Russell Jago, Greet Cardon, Rachel Davey, Kathleen F. Janz, Russell R. Pate, Jardena J. Puder, John J. Reilly, Ruth Kipping

Faculty Publications

Physical activity (PA) patterns track from childhood through to adulthood. The study aimed to determine the levels and correlates of sedentary time (ST), total PA (TPA), and moderate-to-vigorous PA (MVPA) in preschool-aged children. We conducted cross-sectional analyses of 1052 children aged three-to-four-years-old from six studies included in the International Children’s Accelerometry Database. Multilevel linear regression models adjusting for age, gender, season, minutes of wear time, and study clustering effects were used to estimate associations between age, gender, country, season, ethnicity, parental education, day of the week, time of sunrise, time of sunset, and hours of daylight and the daily minutes …

Technical Freediving: An Emerging Breath-Hold Diving Technique, Derek Covington, Robert H. Lee, Steven Toffel, Alberto Bursian, Kirk Krack, Chris Giordano

Journal of Human Performance in Extreme Environments

Technical freediving can be defined as freediving augmented by the use of oxygen-enriched gases or oxygen before, during, or after a freedive. As a result of these techniques, breath-hold divers can visit and enjoy underwater wrecks, reefs, and other diving locations previously located at depths unreachable to apnea divers. By pre-breathing oxygen-enriched gases in conjunction with hyperventilation—which decreases the partial pressure of carbon dioxide (PCO2)—the technical freediver now has additional oxygen to facilitate aerobic respiration during the dive. In addition, pre-breathing oxygen decreases tissue nitrogen tensions, which limits inert gas loading and decreases the risk of decompression sickness (DCS). Finally, …

Semi-Automatic Spatio-Temporal Reconstruction Of The Left Ventricle From Cmr, Mohamed Abdelkhalek

Theses and Dissertations

Cardiovascular simulation and modelling have recently grown into a promising area of research, with a major interest in simulating biophysical phenomena within patient specific environments [1, 2, 3, 4]. With a major focus being faster, less computationally expensive (approaching real time) methods along with reasonable accuracy to actually translate research to application in clinical decision making. This work presents a quick computational framework for building a semi-automatic platform building patient specific spatio-temporal kinematic models of the left ventricle, allowing interactive visualization and detailed quantification of structural e.g. (volume, wall thickness) and functional parameters e.g. (radial Strain, circumferential Strain) of the …

Composite Biomaterial Repair Strategy To Restore Biomechanical Function And Reduce Herniation Risk In An Ex Vivo Large Animal Model Of Intervertebral Disc Herniation With Varying Injury Severity, Warren W. Hom, Melanie Tschopp, Huizi A. Lin, Philip Nasser, Damien M. Laudier, Andrew C. Hecht, Steven B. Nicoll, James C. Iatridis

Publications and Research

Back pain commonly arises from intervertebral disc (IVD) damage including annulus fibrosus (AF) defects and nucleus pulposus (NP) loss. Poor IVD healing motivates developing tissue engineering repair strategies. This study evaluated a composite injectable IVD biomaterial repair strategy using carboxymethylcellulose-methylcellulose (CMC-MC) and genipincrosslinked fibrin (FibGen) that mimic NP and AF properties, respectively. Bovine ex vivo caudal IVDs were evaluated in cyclic compression-tension, torsion, and compression-to-failure tests to determine IVD biomechanical properties, height loss, and herniation risk following experimentally-induced severe herniation injury and discectomy (4 mm biopsy defect with 20% NP removed). FibGen with and without CMC-MC had failure strength similar …

Cost-Effectiveness Analysis Of Colorectal Cancer Screening Strategies Using Active Learning And Montecarlo Simulation, Amirhosein Fouladi

Master's Theses

Colorectal cancer (CRC) is one of the deadliest types of cancer in the US due to its high incidence and mortality rates. Detection of CRC in the early stages through available screening tests increases the patient's survival chances. In this study, we investigate the cost-effectiveness of a wide variety of multi-modal CRC screening policies. More specifically, we develop a Monte Carlo simulation framework to model the CRC natural history and preventive interventions. Age-specific and size-specific progression rates of adenomatous polyps are estimated using an innovative active learning method. Specifically, we develop a decision tree model to estimate size-specific and age-specific …

Physiological Feelings, Edward F. Pace-Schott, Marlissa C. Amole, Tatjana Aue, Michela Balconi, Lauren M. Bylsma, Hugo Critchley, Heath A. Demaree, Bruce H. Friedman, Anne Elizabeth Kotynski Gooding, Olivia Gosseries, Tanja Jovanovic, Lauren A.J. Kirby, Kasia Kozlowska, Steven Laureys, Leroy Lowe, Kelsey Magee, Marie-France Marin, Amanda R. Merner, Jennifer L. Robinson, Robert C. Smith, Derek P. Spangler, Mark Van Overveld, Michael B. Vanelzakker

Psychology Faculty Publications and Presentations

The role of peripheral physiology in the experience of emotion has been debated since the 19th century following the seminal proposal by William James that somatic responses to stimuli determine subjective emotion. Subsequent views have integrated the forebrain's ability to initiate, represent and simulate such physiological events. Modern affective neuroscience envisions an interacting network of "bottom-up" and "top-down" signaling in which the peripheral (PNS) and central nervous systems both receive and generate the experience of emotion. "Feelings" serves as a term for the perception of these physical changes whether emanating from actual somatic events or from the brain's representation of …

Postsecondary Students’ Perceptions Toward Accepting And Understanding Biological Evolution: A Qualitative Metasynthesis, Erin Childress

Electronic Theses and Dissertations

The purpose of this qualitative meta-synthesis is the exploration and analysis of postsecondary students’ perceptions towards accepting and understanding evolution. Evolution as a process and theory is a foundation for understanding the biological sciences. Within the scientific and educational communities, evolution is a central theme tying the fabric of the biological sciences together. A three-tiered analysis was used to determine postsecondary students’ perceptions towards accepting and understanding evolution. This meta-synthesis analysis was guided by the following research questions: (1) What perceived conflicts do post-secondary students face when learning about evolution? and (2) Based on post-secondary students’ perspectives, how do personal …

A Nature- Informed Expressive Arts Therapy Method And Group Participation In Youths, Ella E. Huzdovich

Expressive Therapies Capstone Theses

Abstract

The purpose of this research study was to implement the elements of nature inside a group therapy room in an adolescent partial hospitalization program. This was a comparative study where two groups were led before environment was changed, and two groups were led after environment was changed. The group therapy room was redesigned after the first two groups were conducted. Added to the group therapy room was a 100 x 144 inch forest mural that covered one entire wall, a diffuser that released a forest scent, two large indoor plants, and playing in the background were birds chirping synchronous …

A Pbpk Model Of Low-Concentration Vitamin D Supplementation In The Absence Of Sunlight, Colton Sawyer

Biology and Medicine Through Mathematics Conference

No abstract provided.

Mechanics Of Phenotypic Aging Trajectories In C. Elegans And Humans, William Zhang

Arts & Sciences Graduate Student Theses and Dissertations

Overall, my dissertation integrates longitudinal measurements of physiology to investigate the aging process. In the first half, I examine the surprising and largely unexplained degree of variation in lifespan within even homogeneous populations. I sought to understand how physiological aging differs between long- and short-lived individuals within a population of genetically identical C. elegans reared in a homogeneous environment. Using a novel culture apparatus, I longitudinally monitored aspects of aging physiology across a large population of isolated individuals. Aggregating several measures into an overall estimate of senescence, I find that long- and short-lived individuals start adulthood on an equal physiological …

Health Information Seeking Behaviour Of University Students In Nigeria, Cynthia Onwe, Foluke Okocha

Library Philosophy and Practice (e-journal)

This study was conducted to examine the health information needs and seeking behavior of students in Nigeria It also focused on the following: health information sources used by the students, sources of health information, how these health information are used, extent to which their health information needs are satisfied, demographic factors that influence health information needs and seeking behaviour of the students and the main barriers students encounter in meeting their health information needs. The findings from the study showed that students have a variety of health information needs and their needs vary among gender. It also found that the …

The Effects Of Beetroot Juice Consumption On Maximal Oxygen Consumption, Margaret Vacher-Weiss

Honors Program Theses and Projects

There are many synthetic dietary supplements available to those wishing to enhance their athletic abilities. Unfortunately, dietary supplements do not follow the same strict regulations as do foods or drugs do by the Federal Drug Administration (FDA, 2018). Therefore, they often contain ineffective and sometimes unsafe substances, which may cause short and long-term harmful effects to the consumer (Hirsch, J., 2018). However, there are in fact natural and safer ways to achieve the same effect a synthetic supplement may claim to provide.

Many natural foods are claimed to produce an ergogenic effect (i.e. – enhance athletic performance), one of them …

Interaction Design Needs Modified Principles Of “Design Affordance” For Navigation Applications, Shannon Connell

Theses

It is a common scene for many of us getting from point A to point B these days. One we forget did not exist a little over a decade ago. A phone or device is taken out, a destination is typed into a search box, and a route or several are offered. The user then makes a route decision, places the device within sight, or holds it as they travel. The user relies on provided instructions for most of the route taken and tangential subsequential decision-making. These behaviors are not only accepted as the norm, but our reliance deems them …

Are Steps Per Day Enough? Quality Versus Quantity Of Ambulatory Behavior After A Light-Intensity Physical Activity Intervention For Older Cancer Survivors., Elizabeth Michaela Harding

Health, Exercise, and Sports Sciences ETDs

Physical activity and exercise are powerful means by which to preserve physical function, and stave off mobility loss, morbidity and mortality. Historically, physical activity (PA) interventions have been structured around the national guidelines for PA and exercise. However, some populations such as older adults and those with chronic disease and mobility limitations may find these recommendations too rigorous or daunting. Consequently, they tend to spend more time engaged in sedentary behaviors that further exacerbate the already detrimental effects of age and chronic disease. PA interventions that serve to bridge the gap between sedentary behavior and exercise are needed as our …

Measurement Of Strength Gains Using A Fascial System Exercise Program, Michele M. Bond, Richard Lloyd, Robyn A. Braun, James A. Eldridge

International Journal of Exercise Science

International Journal of Exercise Science 12(1): 825-838, 2019. Current fascia research is allowing for an interdisciplinary understanding of the body’s anatomical, biomechanical, and neurological connectivity via the fascial network. Fascial research and its application has been validated and established in various clinical areas of research. The purpose of this study was to apply the current knowledge of the fascial system to general exercise protocols. This study involved 20 women, ages 30-60 years, who were novice weight trainers, mostly sedentary, and with no injuries, excessive pain or disease. The 10-week study compared strength gain changes between a strength training regimen control …

A Comparison Of Exercise Interventions From Bed Rest Studies For The Prevention Of Musculoskeletal Loss, Nagarjun N. Konda, Rama S. Karri, Andrew Winnard, Mona Nasser, Simon Evetts, Eilis Boudreau, Nick Caplan, David Gradwell, Rochelle M. Velho

More Faculty of Health Research

Musculoskeletal loss in actual or simulated microgravity occurs at a high rate. Bed rest studies are a reliable ground-based spaceflight analogue that allow for direct comparison of intervention and control participants. The aim of this review was to investigate the impact of exercise compared to no intervention on bone mineral density (BMD) and muscle cross-sectional area (muscle CSA) in bed rest studies relative to other terrestrial models. Eligible bed rest studies with healthy participants had an intervention arm with an exercise countermeasure and a control arm. A search strategy was implemented for MEDLINE. After screening, eight studies were identified for …

Widowhood: The First Anniversary Spousal Bereavement-Related Stress, Coping, And Well-Being In Older Women, Mary Elizabeth Minton

Dissertations

By 2020 approximately one million individuals will experience spousal bereavement annually, primarily older women. However, little is known about the survivor's well-being around the first year death anniversary. This study examined spousal bereavement-related stress, coping, and well-being in widows 65 years and older at months 11, 12, and 13 following the death of the spouse based on Lazarus and Folkman's transactional approach and Schaefer and Moos' model of life crises and transitions. Using a prospective, longitudinal, correlational design, data were collected from 47 widows.

That Bike Is Too Heavy: Merging Bicycling Physics, Human Physiology And Travel Behavior, Alexander Y. Bigazzi

PSU Transportation Seminars

Are the Biketown bikes too heavy? Does better gear motivate people to cycle more? How much faster will someone go on an e-bike?

Although urban cycling is widely known as physically active transportation, the actual physics of cycling have been given little attention in transportation engineering and planning. In contrast, the field of sports science has developed detailed data and models of road bicycle performance, but only for sport and racing cyclists.

What can we learn about utilitarian cycling by integrating knowledge of the physical attributes of bicycles and cyclists?

This seminar examines the ways in which bicycle physics, and …