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 83 for “"Tethers"”.
-
Kinetic modeling of electrodynamic space tethers
Electrodynamic space tethers provide propellant-less orbit boosting and de-orbiting of Low Earth Orbit (LEO) satellites. On the one hand, when driven by a current, their interaction with the Earth's magnetic field creates a thrusting Lorentz force. On the other hand, current can be collected from …
-
The dynamics of tethers and space-webs
The thesis 'The dynamics of tethers and space-webs' investigates the motion of the Motorized Momentum Exchange Tether (MMET) on an inclined orbit, and while deploying and retracting symmetric payloads. The MMET system is used as a basis for examining the stability of space-webs using a triangular …
-
The function of golgin vesicle tethers in Drosophila melanogaster
… a class of highly conserved coiled-coil vesicle tethers, have been shown to mediate specificity of membrane traffic to the Golgi via the mitochondrial relocation assay in mammalian tissue culture cells (Wong and Munro, 2014). However, little is known about the role of golgins in polarised cells …
-
Determining the position of underwater tethers in real time
Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.
-
Phosphate Tethers in Synthesis: The Total Synthesis of Dolabelide C.
The utilization of phosphate tethers in synthesis is the focus of the dissertation research described herein. Specifically, cross metathesis of various olefin partners with a phosphate tether has been demonstrated. These studies established the Type III olefin reactivity of the exocyclic olefin of …
-
Self Balanced Bare Electrodynamic Tethers. Space Debris Mitigation and other Applications
The research on electrodynamic tethers (EDT) has been a fruitful field since the 70’s. This technology has been developed thanks to both theoretical studies and demonstration missions. During this period, several technical issues were identified and overcome. Among those problems, two of them would …
-
Multivalent activation in temporary phosphate tethers: A new tether for small molecule synthesis
The use of phosphate esters as temporary tethers, capable of multivalent activation is the broad focus of the dissertation research reported herein. Specifically, the utility of phosphate tethers has been demonstrated through the divalent activation of allylic C2-symmetric monocyclic phosphates. …
-
A systems analysis of electrodynamic tethers incorporating theoretical models of electron collection processes
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1991.
-
Ion flow and membrane tension studies with optical tweezers and nanopipettes
… cell axons and NIH 3T3 fibroblasts to pull lipid tethers. Pulling these tethers allowed the e ffective cell membrane tension of these samples to be investigated. These tethers were pulled from cells plated on glass and hydrogels with di fferent elastic moduli. The force response was the same …
-
Design of a silicon carbide micro-hotplate geometry for high temperature chemical sensing
… hotplates that are suspended by necked tethers. Tether designs minimize heat lose from the hotplate and necking creates heat generation regions. The excellent thermal properties of SiC allow heat to be transferred from the necked tethers to the hotplate; producing a hotplate with a …
-
Membrane tether formation from outer hair cells with optical tweezers
… of OHC plasma membrane (PM) by pulling tethers. A greater force was required for tether formations from OHC lateral wall (499 pN +/- 152) than from OHC basal end (142 pN +/- 49), consistent with the presence of a more extensive cytoskeleton support beneath the PM at the lateral wall. The …
-
Experimental methods by optical trapping for investigation of leukocyte cell rolling mechanics
… membrane as it undergoes cell rolling. Membrane tethers extracted from the cell during rolling function to slow the cell down and to maintain contact with the endothelial wall. Understanding the dynamic behavior of the leukocyte membrane during rolling motion sheds much insight on the …
-
Quantitative biological studies at cellular and sub-cellular level
… In the cellular studies, multiple membrane tethers were extracted simultaneously under constant force transduced to eukaryotic cells through magnetic beads attached to their membranes. The tethers were characterized in terms of viscoelastic parameters. The contribution of the actin …
-
Extraplanetary Exploration Using Electric Solar Wind Sail
… by kilometer-long and thin positively charged tethers with remote units at their tips. Three dynamic models of E-sail are developed: the high-fidelity tether dynamic model, the generalized E-sail model, and the reduced-order analytical E-sail model. The coupling effects of orbital and …
-
Analysis, design, and fabrication of an electric induction micromotor for a micro gas-turbine generator
… to fixed supports by single-crystal silicon tethers that are calibrated after fabrication. The tethers are relatively compliant in the azimuthal plane, but stiff axially. This enables accurate measurement of in-plane displacements, free from losses, while preventing out-of-plane displacements …
-
Modeling of chemical mechanical polishing for shallow trench isolation
… above the stator via mechanical springs, or tethers. The micro motor is fabricated from thick layers of electroplated NiFe and copper, by our collaborators at Georgia Institute of Technology. The rotor and the stator cores are 4 mm in diameter each, and the entire motor is about 2 mm thick. …
-
Synthesis and Biological Evaluation of Coactivator Binding Inhibitors and Bivalent Ligands for the Estrogen Receptor
… through a phenylethynyl linkage with chemical tethers of varying composition and length. The binding properties of the bivalent ligands for ER were measured. Moderate relative binding affinities were obtained and in some cases biphasic binding curves were observed.
-
Applications of an electrostatic high-voltage tether to radiation belt remediation
… upon past studies in the OML regime of charged tethers to determine the deflection angles incurred upon incoming ions at any given incident velocity. Calculated depletion rates are used to computationally estimate the time required to deplete a given range of the magnetosphere.
-
Development of magnetic induction machines for micro turbo machinery
… above the stator via mechanical springs, or tethers. The micro motor is fabricated from thick layers of electroplated NiFe and copper, by our collaborators at Georgia Institute of Technology. The rotor and the stator cores are 4 mm in diameter each, and the entire motor is about 2 mm thick. …
-
Mutations Within and Between Early Cell Division Proteins and Their Effects On Division Regulation In Escherichia Coli
… three essential proteins: FtsZ and its membrane tethers FtsA and ZipA. In this work, I aimed to understand the early regulation of division in E. coli by investigating the structure/function relationships of the proto-ring proteins, as well as their interactions with one another and how these …
Page 1 of 5