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 29 for “"Electric conductivity."”.
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ΣΥΜΒΟΛΗ ΣΤΗ ΜΕΛΕΤΗ - ΚΑΤΩ ΑΠΟ ΦΥΣΙΚΕΣ ΣΥΝΘΗΚΕΣ - ΤΗΣ ΧΗΜΙΚΗΣ ΣΥΣΤΑΣΗΣ ΚΑΙ ΤΗΣ ΡΥΠΑΝΤΙΚΗΣ ΙΣΧΥΟΣ ΤΩΝ ΑΠΟΒΛΗΤΩΝ ΜΙΚΡΗΣ ΟΙΚΟΓΕΝΕΙΑΚΗΣ ΔΟΜΗΣ ΑΓΕΛΑΔΟΤΡΟΦΙΚΗΣ ΕΠΙΧΕΙΡΗΣΗΣ
… MANGANIUM, COPPER, FERRUM AND ZINC. PH AND ELECTRIC CONDUCTIVITY WERE ALSO DETERMINED. DURING THIS PERIOD, METEOROLOGICAL PARAMETERS SUCH AS TEMPERATURE, RAINFALL AND MOISTURE WERECOLLECTED DAILY.
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Experimental studies of the thermoelectric properties of microstructured and nanostructured lead salts
Thermoelectric devices allow for direct conversion between thermal and electrical energy. There applications, however, are severely limited by their inefficiency. A reduction in thermal conductivity of a material potentially enhances its overall thermoelectric performance and can improve the …
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Charge carrier relaxation in fluorite-structured oxygen ion conductors /
… are investigated in the dissertation. The electrical properties (impedance and electric conductivity) were studied in broad frequency (from 1 Hz to 10 GHz) range and wide temperature (from ambient to 1150 K) interval by advanced impedance spectroscopy methods. Dispersions of electrical …
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A efemeropterofauna do trecho ritral inferior do rio Campo Belo, Itatiaia, RJ: composição e distribuição, com aspectos biológicos e ecológicos das espécies de Americabaetis Kluge, 1992 (Insecta: Ephemeroptera: Baetidae)
… p<0,05), depth (R = -0.8165; p<0,05) and electric conductivity (R = 0.7993; p<0,05). By its turn, A. longetron showed significant correlation with pH (R = 0.5784; p<0,05).
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Fabrication and Characterization of Carbon Nanocomposite Photopolymers via Projection Stereolithography
… engineering of an objects tensile strength and electric conductivity. This research has two goals (i) the fabrication of three-dimensional structures using PSL and (ii) the material characterization of nanocomposite photopolymers. A morphological matrix design tool was developed and used to …
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Modeling hotspot dynamics in microwave heating
… steady-state solutions for the temperature and electric fields in closed form. These solutions are valid for arbitrary values of the electric conductivity, and thus extend the previous (small conductivity) results of Garcia-Reimbert et.al. A time-dependent approximate profile for the electric …
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Novel Conceptual Design And Anlysis Of Polymer Derived Ceramic Mems Sensors For Gas Turbine Environment
… for the fabrication of the devices; and tunable electric conductivity, enable the proposed sensors fabricated from similar materials, thus reliability considerations associated with thermal mismatch, which is a big concern when using MEMS-based sensors at elevated temperatures, will be minimized.
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ENGINEERING THE COMPLEX ELECTRICAL RESPONSE OF METALLIC CLUSTER-ASSEMBLED FILMS FOR NEUROMORPHIC COMPUTING APPLICATIONS
… modifications, thus producing changes in their electric conductivity. This phenomenon is referred as Resistive Switching (RS). Even if MCAF based devices have been already exploited in different computing tasks, we still have poor insight on the physics underlying the complex dynamics that …
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Geoarchaeology of the Danilo Bitinj and Pokrovnik Sites, Dalmatia, Croatia
… of site soils and ceramics include pH, electric conductivity, organic carbon content, stable isotope chemistry, and X-ray diffraction. Results indicate sodic: high pH, low conductivity) soil conditions in which Neolithic artifacts have resided for over 7000 calendar years. Both Danilo …
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Parameter analysis of copper-nickel-tungsten prepared via powder metallurgy process for electrical discharge machining of polycrystalline diamond
… tools have an outstanding wear resistance. The electric conductivity of PCD caused by the conductive binding material (Cobalt) makes it possible to machine PCD tools with EDM. Electrode used in EDM of PCD must have better porosity, electrical and thermal conductivity. Therefore, this research …
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Manufacture and Characterization of Micro-/Nano-fibrillated Composites and their Applications
… from M/NFC showing ultra-low thermal conductivity (~32 mW∙m-1∙K-1). Furthermore, we demonstrated a new approach to generate electrically percolated core-sheath fibrils with low reinforcement concentrations in a polymer matrix. We first designed a completely wetted morphology where the …
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Photoanode and counter electrode modification for more efficient dye sensitized solar cells
… the devices that convert solar radiation into electricity. Currently, the most widely used solar cell is based on p-n junction formed with crystalline silicon materials. While showing high efficiency, the high fabrication cost limits its broad applications. Dye sensitized solar cell (DSSC) is a …
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NOVEL NANOMATERIALS FOR ENERGY RELATED APPLICATIONS
… nanofibers were composed of high purity TiC. Electric conductivity of a single fiber was in the 2.00×10^5 range. Symmetrical cyclic voltammetry curve further indicated good electrochemical properties of the fibers. In addition, the TiC nanofibers also exhibited excellent sintering properties …
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Molecular Profiling of Antibiotic Resistant Bacteria and Genes in Raw and Drinking Water
… Treatment Plants throughout the sampling period. Electric conductivity values for water from both plants exceeded the SANS 241 specified limits and ranged between 239 - 846 μs/cm per 100ml of bulk water sample. A total of 202 isolates were detected based on differences in pigmentation of colonies …
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Electron acceleration in a flare plasma via coronal circuits
… to this model photospheric plasma flows build up electric potentials in the active regions in the photosphere. Usually these electric potentials are associated with electric currents closed within the photosphere. However as a result of magnetic reconnection, a magnetic connection between the …
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The effect of treated wastewater effluent on the water quality of the Natalspruit river
… of physicochemical water quality parameters. Electric conductivity, chemical oxygen demand, ammonia, and nitrate concentrations increased downstream of the effluent discharge point primarily due to relatively higher effluent concentrations, except for EC. The suspended solids (SS), pH, and …
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Electrodeless electro hydrodynamic printing of personalized drug dosages
… interface, the fluid was infused into an electrically insulating nozzle to form a pendant drop that served as a floating electrode capacitively coupled to external electrodes. A short voltage pulse was applied to the electrodes to stretch the drop into a liquid bridge that broke up …
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Design and fabrication of non-noble-metal electrocatalysts for oxygen reduction reactions.
… convert the chemical energy in fuels into electricity and it has the advantages including high efficiency, high energy density and zero waste emission. However, a current fuel cell requires noble-metal catalysts (in most cased platinum, Pt) to accelerate the electrode reactions. As a result …
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Force and Conductance Spectroscopy of Single Molecule Junctions
Investigation of mechanical properties of single molecule junctions is crucial to develop an understanding and enable control of single molecular junctions. This work presents an experimental and analytical approach that enables the statistical evaluation of force and simultaneous conductance data …
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