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 309 for “"Coils."”.
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Planar Coils for NMR Microspectroscopy
Planar microcoils suffer from a reduced sensitivity compared to solenoidal microcoils. However, because of their planar geometry, they can be more easily fabricated and integrated into microanalysis systems through the use of microfabrication techniques. This thesis investigates the feasibility of …
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An experimental study of induction coils
Thesis: B.S., Massachusetts Institute of Technology, Department of Electrical Engineering, 1891
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Shading coils for alternating current electromagnets
… contrary to popular opinion. heavy shading coils are not as effective in reducing noise in an alternating current electromagnet as those which are smaller and thus have a greater value of resistance. This occurs because in addition to obtaining the greatest shift possible between flux …
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Study of steel mills lamination coils cooling
… In this work, a new methodology to obtain the coils cooling law has been developed. Numerical models were used to simulate and study the rate of the coil cooling and to calculate the values of the parameters involved in the cooling law. The geometry of the coil is a cylinder with a height …
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Heterotrimeric coiled-coils as viral fusion protein mimics
… including HIV-1, incorporate trimeric coiled-coils in their fusion proteins, and, consequently, are involved in the pathway to infection. Through interactions at the electrostatic interfaces of the coiled-coils, these fusion proteins form a six-helix bundle called a trimer-of-hairpins. The …
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Tomato Juice Film Deposition on Heat Exchanger Coils
Made available in DSpace on 2014-12-05T19:06:35Z (GMT). No. of bitstreams: 1 0010439.pdf: 5267736 bytes, checksum: 64cdf2602276ba91190bb2a6760ca940 (MD5) Previous issue date: 1954
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Transport AC loss in high temperature superconducting coils
… and measuring AC losses in superconducting coils is addressed, with a particular focus on the transport AC loss of coils for electric machines. In order to model the superconducting coil's electromagnetic properties and calculate the AC loss, an existing two dimensional (2D) finite element …
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Computational design of orthogonal antiparallel homodimeric coiled coils
… relationships known about coiled coils. I will then introduce the computational multistate design framework, CLASSY, and explain how I applied it to the computational design of six orthogonal antiparallel homodimeric coiled coils. Five of these designed sequences were …
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Novel geometry gradient coils for MRI designed by genetic algorithm
This thesis concerns the design of gradient coils for magnetic resonance imaging systems. The method of design by genetic algorithm optimisation is applied to novel gradient geometries both by use of conventional computer facilities, and, by parallelisation of the design algorithm, on a …
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Normal zone propagation in high-temperature superconducting tape-wound coils
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1996.
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Wireless power transmission utilizing a phased array of Tesla coils
This thesis discusses the theory and design of coupled resonant systems and how they can be linked in a phased array for the wireless transmission of electrical power. A detailed derivation of their operational theory is presented with a strong emphasis on the current and voltage waveforms …
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Modular design of coiled coils to target bZIP transcription factors
… a super helix. At the sequence level, coiled coils have a repeating heptad sequence with seven positions denoted (a-b-c-d-e-f-g) and typically a hydrophobic residue at a and d positions. Due to a buried hydrophobic interface between the helices, individual coiled coils are unfolded in solution …
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Structural specificity in coiled coils : a and d position polar residues
… trimer. The crystal structures of four coiled coils, with either a single serine or threonine at either the a or the d position, were determined. These structures show that threonine residues tend to form intra-helical hydrogen bonds when packed in the coiled-coil core. Serine residues tend to …
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Sensitivity and noise analysis of solenoidal coils for nuclear magnetic resonance microscopy
… in this thesis is to extend the analysis of RF coils used for NMR to microscopic domains. Microscopic nuclear magnetic resonance suffers from an inherently low SNR, due to the small number of nuclei available to contribute to the signal. Decreasing the size of the RF receive coil provides better …
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Second-generation high-temperature superconducting coils and their applications for energy storage
… an intensive study of superconducting pancake coils wound using second-generation(2G) HTS materials and their application in SMES systems. The specific contribution of this thesis includes an innovative design of the SMES system, an easily calculated, but theoretically advanced numerical model …
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Analysis of surface coils using Green Functions for functional magnetic resonance imaging
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.
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Off-resonance and detuned surface coils for B₁ inhomogeneity in 7-Tesla MRI
… we attempt to correct this by adding surface coils. To adjust the mutual coupling, we vary the resonance properties of the added coil. A new agar-based head phantom was built, and two surface coils were built and tuned. The surface coils were placed in various configurations against the …
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Design of demountable toroidal field coils with REBCO superconductors for a fusion reactor
… allows building demountable toroidal field (TF) coils, greatly simplifying reactor construction and maintenance. A demountable TF coil system with REBCO superconductors for a fusion reactor has been conceptually designed. The coil system operates at 20 K, with a maximum magnetic field of 20 T. …
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Investigation of Trophon® 2 For High Level Disinfection of Rigid Endorectal Mri Coils
… such as 1H and 13C/1H rigid endorectal coils, are classified as ‘semi-critical devices’ and must be processed by high-level disinfection (HLD) between uses. Current methods of HLD are based on chemical immersion. Consequently, the number of clinics implementing this HLD process is highly …
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