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.
Results
Showing 1 to 20 of 30 for “"touchdown"”.
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Using a Single inertial measurement unit to measure the knee flexion angle at touchdown in side cutting movements
… and thigh to measure the knee flexion angle at touchdown during side cutting. Fifty subjects were employed for this study and each person was asked to perform 60 leftwards side cuts. The first 20 side cuts were at 90 degrees, the second 20 were at 45 degrees, and the rest were at various angles …
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Development of an autoland system for general aviation aircraft
… flare planning and placement of the target touchdown point. The approach from the point of autoland initiation, to the approach fix at the the landing site, is performed at cruise power, provided that power is available. The final approach from the approach fix to touchdown, is performed at …
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A Biomechanical Analysis of Sprinters vs. Distance Runners at Equal and Maximal Speeds
… time, and the position of the recovery knee at touchdown. Sprinters and distance runners exhibited a significantly lower minimum knee angle than those in the control group. Significant differences between the sprint and control group existed at the minimum hip angle, speed, stride length, …
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Human-automation task allocation in lunar landing: simulation and experiments
… to automation during the braking, approach, and touchdown phases. Models of human and automation task completion behavior were implemented within a closed-loop pilot-vehicle simulation for three subtasks within the landing point designation (LPD) and final approach tasks, creating a simulation …
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Advanced Linear Model Predictive Control For Helicopter Shipboard Maneuvers
… stable flight near a ship and perform a soft touchdown from that state. A shrinking horizon model predictive control method is presented which can target specific states at specific times and take into account several important factors during landing. This controller is then used in simulation …
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The Decision Making Process in People's Republic of China: China's Response to the Nixon Administration's Policy Toward China
The touchdown of President Nixon's airplane, the Spirit of '76, at Peking airport on February 21, 1972, marked the end of an era in the foreign relations between the United States and the People's Republic of China. This period had persisted from the communist takeover in 1949 to the present. This …
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Towards automatic gene synthesis with bioinformatics software, novel one-step real-time PCR assembly, and lab-chip gene synthesis
… software TmPrime, TopDown and Automatic TouchDown one-step gene synthesis methods; and based on the developed protocols, this thesis also demonstrates an integrated gene synthesis device which is capable to perform two-step gene synthesis as well as purifying the synthesized product for …
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The dynamics of geometrically compliant mooring systems
… experiments, the tension shock condition at the touchdown point and its implications are observed for the first time. The lateral motion of line along the bottom associated with a shock during unloading may be a significant cause of chain wear in the touchdown region. Results from the laboratory …
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Human Papillomavirus DNA extraction and genotype analysis by multiplex real time polymerase chain reaction from formalin fixed paraffin wax-embedded cervical carcinoma specimens
… HrHPV DNA amplification was optimised using a touchdown PCR technique with L1 consensus gene GP5+/GP6+ primers. HrHPV genotypes were detected using a four colour multiplex hrHPV genotyping kit. Samples showing positive results in overlapping probe filter detection spectra were subjected to DNA …
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A simulator study of the horizontal landing characteristics and piloting techniques for manned re-entry gliders
… problem was Investigated from final approach to touchdown, In still and turbulent air, simulating longitudinal equations of motion only. A three phase landing consisting of a steady glide final approach, a nearly constant load factor flare maneuver, and a 15 to 20 second shallow angle, final …
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The directional stability and control of an airplane during the landing roll
… landing gear, during the landing roll after touchdown. The approximate equations of motion are solved on an analog computer to describe the motion of an aircraft as it moves along the runway after it has landed. It is shown that during the landing roll the tricycle landing gear arrangement …
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Differences in Maximal Speed Running Between Baseball Players and Sprinters
… contact time, stride length, center of mass at touchdown and shank angle were measured. ANOVA with repeated measures found that sprinters and baseball players display significant differences in their sprinting technique in all variables except shank angle with the sprinters displaying a shorter …
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Cognitive Map Generation for Vision and Language Navigation
… <p>Experiments conducted on the Touchdown and Map2Seq datasets demonstrate improved navigation accuracy, robust scene-language alignment, and increased adaptability compared to traditional VLN methods. The proposed Cognitive Map framework bridges the gap between visual and …
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Modeling and Control of a Vertical Hopping Robot
… while the robot is in flight to prepare for touchdown. The second control method explores implementing impedance control during stance, allowing the response to mimic that of a mass-spring-damper model. It was found that concentrating the mass of the robot in the hip allows the robot to …
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Effectiveness of adaptive flight planning in the occurrence of total loss of thrust due to bird strike
… recorded as “success” if the pilot achieves safe touchdown on a runway, and “failure” otherwise. The results are analyzed using a generalized linear mixed model approach. The findings present strong evidence in favor of the research hypothesis that the adaptive flight planner can significantly …
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An Open Source, Autonomous, Vision-Based Algorithm for Hazard Detection and Avoidance for Celestial Body Landing
… lander a better probability of performing a safe touchdown. These metrics are processed to optimize a cost function.</p>
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Examination of the magnitude and timing of hip flexion torque in high degree of difficulty forward somersault dives on the 3m springboard
… was digitised from the 10 frames preceding touchdown from the hurdle to 10 frames following take-off to yield vertical and horizontal velocity and angular displacement data. Furthermore, the hip joint torque was calculated via a six segment 'top-down' model. An independent sample t-test was …
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Purification and characterization of a protein phosphatase (PP1-Arch) from the archaebacterium Sulfolobus solfataricus, isolation and expression of its gene
… for PP1-Arch was cloned by a combination of "touchdown" PCR and conventional cloning techniques. The PP1-Arch gene was sequenced on both strands, and the sequence was compared with ones from eukaryotes and bacteriophage λ. The sequence homology between PP1-Arch and PP1/PP2A/PP2B suggests that …
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Validation of CFD Tornado Pressure on Building and Wind Field with TTU Vortex Chamber Measurements
… four important features of tornado vortex (i.e., touchdown swirl ratio, core radius, the maximum tangential velocity & the elevation of maximum tangential velocity) including the ground pressure profile for validation of wind field obtained from CFD model. A comparative analysis of the four …
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Evaluating human fecal contamination sources in Kranji Reservoir Catchment, Singapore
… and IDEXX Colilert Quanti-Tray*/2000. Touchdown PCR and Nested-PCR HF183F assays were used to assess the absence or presence of the HF marker in Kranji catchment. Selected positive HF marker samples were sequenced and mapped using a phylogenetic tree to confirm their similarity in base …
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