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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 85 for “"Appendage"”.
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Cellular principles of Xenopus appendage regeneration
… humans, some animals can regenerate their lost appendages, such as limbs and tails. To identify cellular principles driving this ability, I investigated Xenopus laevis tadpoles. Tadpoles can regrow their lost tails and limbs only at specific developmental stages, allowing comparative studies to …
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Nonlinear dynamics of a rotating, extending spacecraft appendage
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1988.
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INVESTIGATION OF THE DISTAL APPENDAGE PROTEIN CEP164 IN Trypanosoma brucei
… of transitional fibres, which mature from distal appendages on the centriole. These structures rely on the presence of the Cep164 protein to carry out docking and ciliogenesis. Understanding of basal body docking and flagellum length regulation in the Trypanosoma brucei cell is limited and is …
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A myological and osteological comparison of the pelvic appendage of the male and female western meadowlark
<p>Sexual dimorphism has been noted to exist in many genera of birds, but it is not until recently that papers have appeared which deal with the actual extent of sexual dimorphism and its possible adaptive significance. The papers of Rand (1952), Sibley (1957), Amadon (1959), and Selander (1966) …
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UNCOVERING THE EVOLUTION AND DEVELOPMENT OF A NOVEL ABDOMINAL APPENDAGE IN BLACK SCAVENGER FLIES (SEPSIDAE: DIPTERA)
… have recently evolved an elaborate brush-like appendage on the fourth abdominal segment that varies in shape and size across the family. A comparative analysis showed that male sepsids pay for more ornate 4th sternite brushes by reducing their body size and extending pupal development. I then …
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Appendage development and early Distal-less regulation in arthropods: A study of the chelicerate Tetranychus urticae (Acarida)
… by the distinct form and number of articulated appendages present along the antero-posterior axis of their segmented bodies. A great deal is known about the developmental genetics of limb development in the model insect Drosophila melanogaster, added to which, much comparative gene expression …
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Comparison of Apixaban and left atrial appendage exclusion device (Watchman) in preventing stroke and systemic embolism in atrial fibrillation patients
… anticoagulant, and the Watchman, a left atrial appendage closure device, are the currently used therapeutic treatments for the prevention of stroke and systemic embolism in atrial fibrillation patients. However, a direct comparison of these two treatments with respect to safety and effectiveness …
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Mean flow and turbulence measurements in the wake of a slender propeller-driven body including effects of pitch angle
… of 0º and -2° is presented. The effect of an appendage such as a submarine sail to an axisymmetric body is also considered. Mean flow velocities, static pressure, flow angularity, and turbulence quantities are presented at three downstream stations Z/D = 2, 10, and 40. The measurements were …
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Online Estimation of Unknown Parameters for Flexible Spacecraft
… model of a spacecraft with a flexible appendage subject to large deformations by modeling it as a finite series of rigid links connected by torsional springs and dampers. To overcome the uncertainties in the flexible dynamics, an onboard estimation through an adaptive controller is …
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An experimental study of the human interface with one atmosphere diving suit by appendages
… how the pilot interacts with the suit's appendages to inform design improvements and to provide a baseline of joint performance for existing technologies. An Atmospheric Diving Suit is a one person anthropomorphic pressure vessel, with manually operated maneuverable appendages, capable of …
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Funktionelle Charakterisierung und ultrastrukturelle Lokalisierung der Isotypen des Hüllprotein-Komplexes Coatomer
… Es wurden Bindungsstudien mit den g1- und g2-COP appendage Domänen durchgeführt. Appendage Domänen wurden erstmalig bei den a/b-Adaptinen, Bestandteile der Clathrin-Adaptorkomplexe (APs), identifiziert. Neben Aminosäuresequenz-Vergleichen zwischen AP-Komplexen und dem b/d/g/z-COPI Subkomplex …
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An experimental study of a turbulent wing-body junction and wake flow
… that the juncture flow is driven by the appendage geometry and associated pressure gradients. A parameter known as the momentum deficit factor (MDF = (ReÏ ) 2 (θ/T) was found to correlate the observed trends in mean flow distortion magnitudes and vorticity distribution. Variations in …
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Nonlinear Dynamics Analysis and Control of Space Vehicles with Flexible Structures
… as antennas, solar panels, and other extended appendages necessary for their respective missions must consider the nonlinear rotational and vibrational dynamics of these flexible structures. Formulation and analysis of these flexible structures must account for the rigid-flexible coupling …
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Modeling central pattern generators in sand crabs
… out of phase wit h the uropods (last abdominal appendages). During digging, however , the phase relationships between the fourth legs and uropods change and one leg ( either left or right) begins to lead the other. Two general approaches are taken here to model the central pattern generators (CP …
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Studies Towards a Second-Generation Synthesis of the Aplyronines
… carbonate. Discussion in Chapter 5 includes the appendage of the C28-C34 side chain 118, prepared by the known sequence, and suggestions for the future direction of the second-generation route with the outlook of linker appendage for the purposes of antibody-drug conjugate development.
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Modeling and Slew-Maneuver Control of a Flexible Spacecraft
… of a rigid main body to which a long flexible appendage is attached. Nonlinear dynamical system models are developed using both distributed parameter modeling and discrete parameter modeling; these models are shown to be equivalent for appropriately chosen system parameters. Lyapunov-based …
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Universal Atrial Coordinate (UAC) for Wall Motion Deep Learning
… motion and blood stagnation in the left atrial appendage (LAA). Standard scores like CHA₂DS₂-VASc overlook patient-specific motion patterns, while AF's episodic nature and anatomical variability hinder consistent analysis. This thesis presents a standardized framework for LA wall motion analysis …
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Aeroelastic Analysis of a Flexible Membrane Wing
… of the forced vibration response of a wing appendage used to augment short field take off and landing (STOL) operations.</p> <p>Although flutter theory is now well understood, the LAS presents the complications of a highly deformable airfoil shape as well as larger structural damping values …
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Proportional-Derivative-Acceleration Feedback Controller Design for Single Axis Attitude Control of Rigid Spacecraft with Flexible Appendages
… of single axis attitude control of flexible appendages attached to a rigid spacecraft. Conventionally, PID with position feedback was used to control single axis attitude manoeuvre of flexible appendages on a spacecraft but designing a PID to control a higher order system is a limited …
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