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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 571 for “"Current density"”.
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High Frequency, High Current Density Voltage Regulators
… The design challenges are the high current, high di/dt, and stringent load-line requirement. When the energy is transferred from the input of a VRM, through the VRM, then through the power delivery path to the processor, it needs sufficient capacitors to relay this energy. The …
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An investigation into the effect of current density on overvoltage
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Electrochemical Engineering, 1922.
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Critical current density in hot-pressed garnet Li7La3Zr2O12 solid state electrolytes
… of the most promising ways to increase energy density. To avoid dendrite problems caused by lithium metal anode, many kinds of solid state electrolytes are reported. Garnet Li<sub>7</sub>La<sub>3</sub>Zr<sub>2</sub>O<sub>12 </sub>has high chemical and electrochemical stability with lithium …
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Multipoint measurements of field aligned current density in the auroral zone
… edge of an auroral arc.</p><p>Field Aligned Current (FAC) density was calculated from the multipoint magnetic field measurements by Taylor series expansion to the first order. Both spatial structures and temporal variations are seen during this event and interpretations of the results are …
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Production of High Current Density Ion Beams by Electrohydrodynamic Spraying Techniques
Made available in DSpace on 2014-12-08T22:24:43Z (GMT). No. of bitstreams: 1 7000997.pdf: 3111626 bytes, checksum: 45f52037ff940722e80edba2d6779213 (MD5) Previous issue date: 1969
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Ionic conductivity and exchange current density of non-aqueous lithium polysulfide electrolyte
… electrodes, have high theoretical energy density and low raw materials cost. To achieve greater electrode-level energy density, higher sulfur concentrations are needed. In a given electrolyte system, sulfur charge storage capacity (e.g. mAh/g sulfur) decreases dramatically with increasing …
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Increased critical current density in rapidly grown RE-based cuprate superconducting coated conductors
… stage, is also investigated. This method is currently used industrially by SuNAM Co. Ltd., a collaborator on this project. We show that it is possible to replicate the liquid-assisted process used at the factory via pulsed laser deposition in a vacuum chamber. We use these results to …
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Wear of high speed, high current density slip ring materials at elevated temperatures
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1981.
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Non-fluorine precursor solutions for high critical current density REBa₂Cu₃O₇₋x̳ films
… solution for YBCO films with high critical current densities (Jc). An aqueous nitrate precursor solution system was selected from three possible precursor solution systems. It was further developed to produce YBCO films with Jc > 1 MA/cm2. Films up to ~800 nm thickness were made, and Jc > 1 …
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Response of periodic systems to electromagnetic fields: multipole expansion, microscopic charge-current density, polarization and magnetization
… they describe the distribution of charges and currents induced in the material medium due to an application of electromagnetic fields. Here I develop strategies to treat polarization and magnetization fields in periodic structures and I analyze the radiation spectrum emitted by them. The …
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Polarimetry measurements of current density profile and fluctuation changes during lower hybrid experiments on Alcator C-Mod
… in a tokamak fusion reactor, Lower Hybrid Current Drive (LHCD) has been extensively studied on Alcator C-Mod. The measurement of current density profiles (or poloidal magnetic field or safety factor) is essential to the understanding of the LH physics. A polarimeter measures the …
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The Effect of High Electronic Current Density on The Motion of Gold-195 and Antimony-125 in Gold
Made available in DSpace on 2015-05-12T21:41:34Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6604186.PDF: 2919880 bytes, checksum: 9b716d0548b37afe130db88c8d2962e4 (MD5) Previous issue date: 1965
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The effect of high electronic current density on the motion of Au[superscript 195] and Sb[superscript 125] in gold
"The effect of high electronic current density on the motion of -the Au195 and Sb125 ion.s in gold was ,studied by means of a novel lathe-sectioning technique that per~itted the assay of radioactive sections from a specim,en only ""3 mm. in diameter. The mobility, v/j, of the Au195 ion in gold was …
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Modulation of calcium channel expression in cardiac myocytes of rats during growth hormone-induced growth or normal postnatal development
Voltage-dependent Ca$\sp{2+}$ currents of cardiac myocytes were studied using patch-clamp techniques. T-type Ca$\sp{2+}$ current density of atrial myocytes was found to be positively correlated with the plasma growth hormone levels and the growth rate of atrial myocytes in normally developing …
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Electrode materials for the electrolysis of metal oxides
… and were characterized for inertness and high current density during electrolysis using voltammometric techniques. Inertness is viewable through current discrepancies dependent on voltage scan direction at low voltage, consumption of current by metal oxide formation, and ease of surface oxide …
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Roles of surface finish and hydrogen availability on the tensile properties of 1018 steel in hydrogen environments
… were tested at various cathodic charging current densities. The tensile deformation was initiated only after the specimen was charged to at least 95% with hydrogen. The data presented in this study show that very low cathodic charging current densities result in larger ductility losses for …
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Analysis and Design of Electrodes for Deep Brain Stimulation
… of charge transfer was dependent on both the current density and the sinusoidal frequency. The assumption of the DBS electrode being ideally polarizable was not valid under clinical stimulating conditions. This implies that irreversible processes that can cause electrode or tissue damage might …
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Control of electrodeposit properties of nickel and nickel alloy by pulse plating.
Pulsed-current electrolysis with various ratios of on-time to off-time have been applied to the deposition of Ni and Ni/Fe alloys from Watts and Ni/Fe baths.The electro-depositions of nickel and nickel-iron alloy on copper and mild-steel substrates using Watts and Ni/Fe baths have been …
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Electrodialysis of acetic acid fermentation broths
… increasing the flow rate increased the limiting current density. There appeared to be no limiting current density for model acetate solutions.
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