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 64 for “"Ohm"”.
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Inline disinfestation of canola seeds from red flour beetles using a 50-ohm RF technology
… insects in stored grains. A pilot-scale 50-ohm radio frequency (RF) heating system was used to disinfest adult red flour beetles (Tribolium castaneum) in bulk canola seeds (Brassica napus L.) of 9 % moisture content (MC) in a tubular applicator with parallel electrodes. The heating …
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Utilização de um ambiente virtual para o ensino de leis de Ohm no ensino básico
… de um ambiente virtual para ensinar as leis de Ohm, fazendo uso de smartphones ou tablets em classe. O produto desenvolvido nessa dissertação foi a utilização de um ambiente virtual para o ensino de leis de Ohm no ensino básico. Os dispositivos móveis servem de suporte tecnológico para que se …
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Infrared absorption of neutron irradiated silicon
… increased from an assumed initial value of 10³ ohm-om to 1.89 X 10⁵ ohm-om.
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A theoretical and experimental investigation of the annular jet ground effect machine
… increased from an assumed initial value of 10³ ohm-om to 1.89 x 10⁵ ohm-om.
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A history of Ohm's Law: Investigating the flow of electrical ideas through the instruments of their production
… dive into the electrical work of Georg Simon Ohm. It is tightly focused on the period 1825-1827 when he developed and published the famous law we now think of as “Ohm’s law”. This work differs from previous studies of Ohm’s investigations by putting material culture at its heart. Using Ohm’s …
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Recombination lifetimes in gamma-irradiated silicon
… boron doped samples ranged between 10 and 5000 ohm-cm, and the resistivity of the phosphorus doped samples was between 20 and 220 ohm-cm. Both crucible and floating zone grown materials were investigated. The radiation induced lifetime changes were interpreted by the theory of Hall, and Shockley …
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Structural studies of cadmium telluride thin films
… was determined. A maximum resistivity of 10 Ohm-metre was measured for films produced by flash evaporation at a substrate temperature of 420 K. The structure and electrical properties of thin films produced by flash deposition were investigated for thin films formed from powder mixes of …
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Microwave-Frequency Conductivity of Alpha Silver-Iodide, Microwave Spectroscopy of Hydrogen-Bonded Species, and Design of a High-Temperature Nozzle Source
… over this range and has a value of 1.2 (ohm-cm)('-1) at 429 K. These results are combined with other recent measurements to interpret the ionic transport in terms of motion between the tetrahedral sites of the AgI lattice.
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Geomagnetic variations in the Northwest Atlantic : implications for the electrical resistivity of the oceanic lithosphere
… The low resistivity layer of approximately 10 ohm-m has been found at three widely spaced seafloor sites with crustal ages of 85, 110 and 150 million years. There is also evidence that the resistivity increases to greater than 20 ohm-m below about 100 km. Apparent resistivity and phase versus …
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Structural and magnetotransport study of SrTiO3-δ/Si structures grown by molecular beam epitaxy
… H=0 to ±9T. The resistivity decreased from 1 Ohm cm to 3x10-2 Ohm cm as the film thickness increased (3nm-60nm) at all temperatures. To identify the origin of the resistivity thickness dependence, we consider several competing effects in STO/Si such as 1.7% compressive strain induced by …
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Distal Intraoperative Flowmetry for Assessment if Haemodynamics after Infrainguinal Arterial Reconstructions // Дистална интраоперативна флоуметрия за оценка на хемодинамиката след инфраингвинални артериални реконструкции
… регистрирано автоматично от апаратурата (R-Ohm) и като отношение между налягане и минутен обем на кръвотока( P/Q-PRU) - отношение между основните и първи хармонични амплитуди след трансформация на Фурие на сигналите от налягането и кръвотока. Интраоперативните хемодинамични показатели са …
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Theory and applications of chirality in microstrip antennas
… approach, specifically the Ohm-Raleigh method, is employed to obtain a modal expression for the full-wave Green's function. By using asymptotic techniques, the far-field electric field is found for an elemental point dipole source. The theory is directly applicable to …
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Pen-on-paper electronics
… over several orders of magnitude between 2x10^-4 Ohm-cm (pure silver ink) to 200 Ohm-cm (pure carbon ink). Pen-on-Paper electronics offers an inexpensive and intuitive approach to creating paper electronic devices. By filling commercial rollerball pens with conductive silver and resistive carbon …
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MANGANESE OXIDE AS A NEW CATHODE CATALYST IN MICROBIAL FUEL CELLS (MFCs)
… resistance (Rin) of the OMS-2 SCMFCs (18±1 ohm) was similar to that of the platinum SCMFCs (18±1 ohm). Furthermore, the degradation rates of organic substrates in the OMS-2 SCMFCs were twice those in the platinum SCMFCs, which enhance their wastewater treatment efficiencies. Power generation …
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Metody přesného měření nízkých impedancí
… metod pro měření nízkých impedancí pod 10 Ohm v kmitočtovém rozsahu do 1 MHz. Práce je rozdělena na tři hlavní části. První část práce se zabývá vývojem unikátních a konstrukčně jednoduchých vypočitatelných etalonů odporu, které jsou použity jak ke kalibraci můstku, tak i jako referenční …
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The Trapped Charge Interfacial Modulation of the Electron Beam Induced Current in Metal Oxide Semiconductor Capacitors
… (15) MOS capacitors were fabricated on 1-10 ohm-cm, p-type 100 silicon and were placed in the focal plane of a scanning electron microscope (SEM) to selectively populate and generate the oxide traps. As the electron beam scans from a region of the MOSC in the WRITE state to a region in the …
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Carbon nanotube based electromechanical probes
… fabricated in very short production times. 1.5 Ohm resistance and reliable performance for 6000 cycles at 50 [mu]m over-travel was achieved for a column of 200 [mu]m x 200[mu]m cross-section and 1plm of Au deposition. In-situ scanning electron microscope mechanical compression tests revealed a …
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Antimony-based type-II superlattice infrared photodetectors on indium-arsenide substrates
… 78 K. Their R0A values are on the order of 10^-2 Ohm*cm2. The typical peak responsivity is 1.9 A/W, and the devices have a peak detectivity of 6.8 * 10^9 cm*Hz^1/2 /W at 78 K.
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Functional thin film polymers for biopassivation of neuroprosthetic implants
… has an electrical resistivity of 4 X 1015 Ohm-cm and has been demonstrated to be smooth (RMS roughness < 0.4 nm), adherent to silicon substrates, insoluble, and hydrolytically stable. Long term soak testing under physiological conditions has demonstrated retention of electrical properties …
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Slow-wave electrode structures for III-V semiconductor based electro-optic travelling-wave modulators
… effective refractive index as well as 50 or 75 ohm characteristic impedances can be designed. A dielectric superstrate may also be used to help slow down the microwave somewhat, potentially enabling fine tuning, as well as to protect the electrodes. The electrodes may also be partially buried in …
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