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 14 of 14 for “"Rotational freedom"”.
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The Distributed Spacecraft Attitude Control System Simulator: From Design Concept to Decentralized Control
… for experimentation, thereby recapturing the freedom of the space environment as effectively as possible. Depending upon con- figuration, air-bearing systems provide some combination of translational and rotational freedom; the three degrees of rotational freedom provided by a spherical air …
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Fluorescence Depolarization Study of Internal Tryptophan Mobility in Hydrated Azurin Films
… allowing examination of internal degrees of rotational freedom in the protein as a function of film hydration. In the dry film at room temperature the tryptophan fluorescence emission showed the limiting polarization characteristic of low temperature solutions in which all motion is frozen. …
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Fluorenscence depolarization study of internal tryptophan mobility in hydrated azurin films
… allowing examination of internal degrees of rotational freedom in the protein as a function of film hydration. In the dry film at room temperature the tryptophan fluorescence emission showed the limiting polarization characteristic of low temperature solutions in which all motion is frozen. …
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An Autonomous Underwater Vehicle for Validating Internal Actuator Control Strategies
… benefits to the use of internal actuators for rotational maneuvers of small-scale underwater vehicles. Internal actuators are protected from the outside environment by the external pressure hull and will not disturb the surrounding environment during inspection tasks. Additionally, internal …
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A battery powered near infrared (NIR) camera for the MIT HelioDome
… are mounted to a table which has two degrees of rotational freedom, altitude and azimuth. Using the rotating table and cameras in combination with an ellipsoidal dome, which is coated with a semi-transparent specula coating, allows a time-efficient and continuous measurement of bidirectional …
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The Effects of Tibiofemoral Conformity on the Kinematic Freedom of Revision Total Knee Arthroplasty Systems
… designs may restrict the tibiofemoral kinematic freedom at the joint. Therefore, the revision knee system must provide sufficient joint stability without constraining the desired kinematic freedom. The objective of this work was to describe the tibiofemoral kinematics and passive laxity envelope …
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Optimal Open Loop and Nonlinear Feedback Control for Remote Orbital Capture (multi-Body Dynamics, Recovery, Satellite Servicing, Payload Handling)
… (the Hooker-Margulies equations). Two degrees of rotational freedom are allowed at the joint which connects the OMV and target spacecraft, and the joint is allowed to translate on the surface of the OMV. The initial condition of the axially symmetric target satellite is free spin and precession. …
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DESIGN, SYNTHESES, AND BIOLOGICAL EVALUATION OF 14-N-SUBSTITUTED NALTREXONE DERIVATIVES AS OPIOID RECEPTOR LIGANDS
… selectivity was not recovered by introducing rotational freedom into the linker. Some of these 14-N-substitued naltrexone derivatives were determined to be mu-kappa opioid receptor dual selective antagonists. Since the mu opioid receptor antagonists are effective at treating drug addiction, …
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Infrared and Raman spectroscopic studies of matrix isolated amines
… the bands could be explained as being due to the rotational freedom of the molecule in the substitutional site. However, the Raman results are completely incompatible with the theory that relatively free rotation in the matrix site is occurring. Using a group theoretical treatment the results are …
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Experimental investigations and finite element analyses of interface heat partition in a friction brake system. New modelling paradigm for describing friction brake systems to support studies of interface temperature, contact pressure, heat flux distribution and heat partition ratio by experiment and FE simulation
… on brake disc/pad models and the degree of rotational freedom allowed for the pad. Conventional models [10] allow no motion/or free motion of the pad. The present work investigates the effect on disc/pad interface temperature and pressure distributions of limited relaxations of this …
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Crystallographic texture of the arthropod cuticle using synchrotron wide angle X-ray diffraction
… the cuticle plane. The observed spatial rotational freedom of the c-axis of alpha-chitin (fiber axis) represents the twisted plywood structure of the alpha-chitin fibers as observed in scanning electron microscopy (SEM). Additionally, a smaller fraction of the alpha-chitin unit cells in …
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Experimental investigations and finite element analyses of interface heat partition in a friction brake system. New modelling paradigm for describing friction brake systems to support studies of interface temperature, contact pressure, heat flux distribution and heat partition ratio by experiment and FE simulation
… on brake disc/pad models and the degree of rotational freedom allowed for the pad. Conventional models [10] allow no motion/or free motion of the pad. The present work investigates the effect on disc/pad interface temperature and pressure distributions of limited relaxations of this …
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Visual Adaptations and Behavioural Strategies to Detect and Catch Small Targets
… yaw, and roll. These high speeds and degrees of rotational freedom make control a complex problem. However, from the perspective of the researcher attempting to decipher the control laws that underpin predator guidance, the question is made more soluble by the predator’s fixation on its target. …
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Enhancing Fluorescence and Charge Transport in Disordered Organic Semiconductors
… However, we also explore the importance of rotational freedom in determining the oscillator strength, exchange energy, and spin-orbit coupling matrix elements which mediate luminescence in the absence of a rigid host. We demonstrate that suppressing dynamic motion is a powerful tool to …