Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 28 for “"skeletal system"”.
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Bone growth during puberty and the effects of exercise and calcium on bone mass accrual
… by the rapid growth and development of the skeletal system. The timing and magnitude of skeletal development varies considerably between individuals however, environmental factors may make significant contributions to the variance in bone mass. To optimise the development of bone it is …
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Learning control of bipedal dynamic walking robots with neural networks
… scheme of data clustering is explored. This system is applied successfully in a biped walking robot system with a supervised learning mode. Generalized Virtual Model Control (GVMC) is also proposed in this thesis, which is inspired by a bio-mechanical model of locomotion, and is an extension …
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Three-dimensional image reconstruction of skeletal tissue from computed tomography
… techniques are used in the reconstruction of the skeletal system from modalities such as MRI (magnetic resonance imaging) and CT (computed tomography).;In this thesis, we develop a simple process for the three dimensional image reconstruction of the human knee, starting from computed tomography …
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The development and use of fifteen year-old equivalent mathematical phantom for internal dose calculations
… construct of idealized shapes of the exterior, skeletal system, and internal organs of a human. The idealization for an average adult presently in use by the International Commission on Radiological Protection was used as a basis for design. The mathematical equations describing the phantom were …
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Low magnitude high frequency vibrations applied to the foot through the pedal of a human powered artificial gravity (HPAG) cycle
… load the weight bearing components of the musculoskeletal system. Elastic bands provide the "down" force for the astronaut while running. For high force loading, the astronaut performs a specified regimen of weight lifting exercises using resistive devices. The resistive devices provide a load in …
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Characterization Of The Skeletal Phenotype In Idua-W392X Knock-In Mice: Bone Metabolism Biomarkers
… with inevitable degeneration of multiple organ systems. Accumulated excess of GAGs on the skeletal system causes dysostosis multiplex, atlantoaxial instability, thoracolumbar kyphosis, genu valgum, acetabular dysplasia, and short stature. Skeletal biomarkers of bone formation and bone resorption …
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Gingival MSCs Improve Bone Phenotype in Ovariectomy-Induced Osteoporosis via Programmed Cell Death Pathway
Estrogen deficiency-related osteoporosis is a skeletal system disorder that affects women after menopause taking a toll on financial and health institutions. Gingival Mesenchymal Stem cells (GMSCs) are a distinctive population of dental tissue-derived stem cells that possess uniquely high …
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The Effects of Denervation and Arterial Ligation on Calcium Turnover in Bone
… calcium requirements without weakening the skeletal system. With disuse, this balance is upset and osteoporosis sets in. | In the mechanism of disuse osteoporosis several local factors may be operative, such as: mechanical forces (muscle pull and pressure) and nervous and circulatory …
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A critical benefit analysis of artificial gravity as a microgravity countermeasure
Human physiological systems, especially the cardiovascular and musculo-skeletal systems, are well-known to decondition during spaceflight. Several countermeasures that are in use today have been rigorously developed over the decades to combat this deconditioning. However, these countermeasures are …
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Secular Change In the Knee Joint and the Effects of Obesity
… is how excessive body weight affects the skeletal system. The purpose of this study is to: (1) determine if there is a secular change in the articular surfaces of the knee joint, (2) determine if there are differences between normal weight and obese individuals in the articular surfaces of …
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Isolation of Mesenchymal Stem Cells Derived from Adult Bone Marrow and Umbilical Cord Blood and Their Potential to Differentiate into Osteoblasts
The demand for treatment strategies of musculoskeletal tissues is continuously growing, especially considering the increasing number of elderly people with degenerative diseases of the skeletal system. Despite major strides in the field of bone regenerative medicine during the years, current …
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Changes in Bone Mineral Density and Biomarkers of Bone Turnover with Calcium Supplementation During Initial Military Cadet Exercise Training
… density (BMD) and increased fragility of the skeletal system. Osteoporosis affects ~75 million individuals in the United States, Europe, and Japan. In the United States alone, hip fractures affect 500,000 individuals per year, and annual healthcare costs for osteoporotic fractures are …
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Degradation of mechanical properties of bovine cortical bone during long-term whole bone storage.
… predicting fractures and failures in the human skeletal system. Mechanical testing has been the conventional method for characterizing bone materials. However, due to the limited wall thickness of whole bones, only small cortical bone specimens can be obtained which creates challenges when …
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Investigating Human Cell Influence on the Micromechanical Environment of a 3D-Printed Bone Tissue Model
… tumors to distant sites, or metastasis, with the skeletal system being one of the most common locations for metastasis, with rates as high as 70%. Despite this, the mechanistic factors behind BC cell recruitment, infiltration, and survival in the bone niche remain underexplored. Extracellular …
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Biology topics perceived as different by High School Pupils of Kasama and Mungwi Districts of Zambia
… meiosis, genes and chromosomes, DNA synthesis, skeletal system and evolution. The identified the reasons why pupils experienced challenges in learning the above topics as the following: the topics were characterized by complex terms; teachers were not conducting practical laboratory work but …
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Body composition especially external skeletal robustness in association with physical activity and recreation in pre-pubertal children : a national and international investigation
… elevate the risk of cardiovascular diseases and skeletal modifications. Heredity and environmental factors as nutrition, socioeconomic status, physical activity and inactivity influence fat accumulation and the skeletal system. Based on these negative developments associations between type of …
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Insular adaptations in the appendicular skeleton of Sicilian and Maltese dwarf elephants
… interspecific differences in the musculo-skeletal system. Furthermore, on the basis of dimensions, morphology and stratigraphy, the large Palaeoloxodon sp. remains from Luparello Fissure, north-western Sicily are suggested to belong to the ancestral chronospecies of P. ex gr. P. falconeri …
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Modeling of equilibrium point trajectory control in human arm movements
… mechanical behavior of the neural, muscular and skeletal system in the control and coordination of arm posture and movement. A significant problem of the study is how this information should be used to modify control signals to achieve desired performance. This study used an EPH model to examine …
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The Impact Of Dietary Phytase Supplementation On Skeletal Biomechanics And Characteristics In Growing Swine And Mice
… and mass, particularly in early life. Musculoskeletal diseases, such as osteochondrosis and osteoporosis, are debilitating to humans and animals and create a substantial financial burden on the country's health care system and food animal production industries. Efforts to discover strategies …
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INHIBITED MINERALIZATION IN OSTEOBLASTS CULTURED UNDER VARIED SIMULATED PARTIAL GRAVITY CONDITIONS AND THE USE OF PHYTONUTRIENTS FOR MITIGATING THE EFFECTS OF REDUCED GRAVITY
… adverse effects of reduced gravity on the skeletal system pose a significant challenge to human spaceflight. There is an interest in investigating any hypothetical differences between partial gravity and microgravity, and in the unmet need to identify countermeasures to both. A hypothesis …
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