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 211 for “"Upright"”.
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Characteristics of optokinetic torsion in upright and supine orientations
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1985.
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Implementation of Upright Treatments For Lung and Head and Neck Cancers
… numerous benefits to treating patients in the upright position such as better patient comfort and increased total lung volume with reduced lung motion. The purpose of this study was to investigate the feasibility of implementing upright treatments for lung and H&N cancers. Several clinical …
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Parametric Design and Optimization of an Upright of a Formula SAE car
… the heart of a race car's performance lies the upright—a critical component of its suspension system. The upright serves to link the suspension arms to the wheels, effectively transmitting steering and braking forces to the suspension setup. Achieving optimal performance requires finding the …
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Contribution of Modified Visual Gain to Human Balance Control During Quiet, Upright Stance
… contributes to balance control during quiet, upright stance among healthy adults. Optic flow was amplified or reduced relative to head motion while participants stood quietly on either a firm or foam surface. Overall, when there was an increased reliance placed on the visual system by standing …
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Biomechanical testing of upright range of motion versus overhead supine range of motion
… overhead range of motion and the commonly used upright range of motion protocol. The hypothesis is that supine overhead range of motion provides stability to a collateral deficient elbow. Moreover, supine overhead range of motion is a superior way to rehabilitate an unstable elbow because the …
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The effects of postural threat on cognitive strategies used to maintain upright stance
It is well established that postural threat modifies postural control, although little is known regarding the underlying mechanism(s) responsible. It is possible that changes in postural control under conditions of elevated postural threat result from alterations in cognitive strategies. The …
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Application of a model of cerebellar function to the maintenance of human upright posture
… the postural strategies that make possible human upright posture in gravity. Performance of the model is investigated with regard to disturbance rejection after adjustment of the parameters representing the cerebellum and the muscle. Whether the combination of the cerebellar and musculoskeletal …
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Use of Statistical Mechanics Methods to Assess the Effects of Localized muscle fatigue on Stability during Upright Stance
Human postural control is a complex process, but that is critical to understand in order to reduce the prevalence of occupational falls. Localized muscle fatigue (LMF), altered sensory input, and inter-individual differences (e.g. age and gender) have been shown to influence postural control, and …
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An evaluation of piano sound and vibration leading to improvements through modification of the material properties of the structure
A study of vibrations and sound radiation in upright and grand pianos has been made to determine whether the piano may be improved by altering the materials of the component parts which are traditionally fabricated in timber. Modal analysis and sound level measurements of an upright piano has shown …
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What's Up with High- and Low-Pitched Sounds? Reference Frames used in the Crossmodal Correspondence Between Auditory Pitch and Visuospatical Height
… low and high tones be used as spatial cues to upright for self-orientation? And what spatial frame(s) of reference is used to perceptually bind these crossmodal features? In experiment 1, participants’ Perceptual Upright (PU) was measured with and without presented auditory orientation cues but …
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An investigation into the ergonomics of standing
… of what happens when a human being stands upright. The review starts by exploring those changes to the skeleton and musculature which have enabled homo sapiens to be erect. This is followed by a look at how humans maintain upright posture through postural control and the role of the …
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Factors Affecting Behavioral Variation of Individual Glaucous-Winged Gulls (Larus Glaucescens) While on Territory
… of season. Gulls tended to be more alert (used upright and intermediate-upright displays) during the "chick" stage than earlier in the season. Attendance rates were very similar between individuals of the same gender, and a significant correlation was found between the attendance rates of …
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Squat exercise biomechanics during short-radius centrifugation
… how centrifuge-based exercises differ from Earth-upright ones. Two experiments were designed to investigate the squat biomechanics while upright in the laboratory and while lying supine on a horizontal, clockwise-rotating short-radius centrifuge at speeds up to 30 revolutions per minute. Constant …
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Does Infants' Socially-guided Attention Uniquely Predict Language Development?
… for their attention. Dynamic human face (upright, inverted) and abstract display with their matched voice tracks were used to separately measure infants' attention regulation to different types of events. Infants' sustained attention was estimated by their latencies away from central …
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A computerized analysis of silo investments
… for horizontal, $9.60 to $24.92 for conventional upright, and $29.42 to $66.75 for oxygen-limiting silos. Annual costs ranged from $2045 to $4572, $1708 to $4673, and $4901 to $14805 for horizontal, conventional upright, and oxygen-limiting silos. However, horizontal silos were larger than the …
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Quantification and Evaluation of the Biomechanical Behaviour of the Trunk During Fundamental Tasks: Should the Thoracic Spine be Considered?
… #1). Thirty participants performed 10 trials of upright standing and maximal trunk ROM. Most measures demonstrated high repeatability, with two to five trials required. The head and arm positions enabling maximal spinal ROM were determined in Study #2 using 24 participants, as relationships have …
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Synoptic and Mesoscale Dynamics of Snowbands in Winter Cyclones
… embedded narrow bands were oriented vertically upright, their widths and evolution characteristics similar to radar observations; (2) Conditional symmetric instability did not contribute to the formation of the narrow bands, rather, the release of potential instability at the interface of the …
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The Development of a Head and Neck Support Device for Children with Cerebral Palsy
… System, struggle with posture and sitting upright. This inability to sit upright impacts many aspects of their life such as learning, eating, communicating, and breathing. If a person with cerebral palsy can keep their head upright, there are many benefits that include reduced muscle tone, …
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The Effect of Optic Flow During Attention Related Tasks and Quiet Stance
… balance. Increasing visual information during upright stance leads to tighter regulation of upright stance. Cognitive related tasks and postural control share capacities and compete for cognitive resources which may cause interference on one or both tasks. There is limited work on the impact of …
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