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 70 for “"ZT"”.
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Searches for Vector Like Quarks Decaying to Ht, Zt, or Wt in the Single Lepton Channel with the ATLAS Detector
<p>A search for single production of Vector-Like quarks decaying to the Higgs boson and a top quark, or a massive vector boson and a top quark is presented. Events with exactly one high momentum lepton, at least three hadronic jets, of which at least one originates from a b-quark, and large missing …
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Materials Physics for Thermoelectric and Related Energetic Applications
… dimensionless number called the Figure-of-Merit (ZT), defined as ZT = [sigma]-S 2T / [kappa], where a is the electrical conductivity, K is the thermal conductivity, S is the Seebeck coefficient, and T is the absolute temperature. Before 1993, the upper-limit of ZT was barely 1. After the efforts …
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Nanocomposites as thermoelectric materials
… depends on the dimensionless figure of merit (ZT) of the material, defined as ZT = S2o-T / k, where S is the Seebeck coefficient, o is the electrical conductivity, k is the thermal conductivity, and T is the absolute temperature. In recent years, the idea of using nanotechnology to further …
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A Nanoengineering Approach to Oxide Thermoelectrics For Energy Harvesting Applications
… possess thermoelectric figures of merit ZT ≥ 1. We examined the effect of metal nanoparticle – oxide film interfaces on the thermal conductivity κ and Seebeck coefficient α in bilayer and multilayer thin film oxide thermoelectrics in an effort to improve the dimensionless figure of merit …
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Effects of a time-restricted high- or low-fat diet on lipid absorption
… schedule (lights on at 10pm (Zeitgeber Time - ZT0) and lights off at 10am (ZT12)). Food was made available continuously to mice in the control ad libitum low-fat (CALF) and control ad libitum high-fat (CAHF) feeding groups. Mice in the control low-fat (CLF) and control high-fat (CHF) groups …
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Effects Of Sustained Release Somatostatin Type 2 Antagonism On Glucagon Counterregulation And Glycemia In Type 2 Diabetic Rate Model
… somatostatin receptor 2 antagonist (SSTR2a), ZT-01, could enhance endogenous glucagon secretion and protect against hypoglycemia in a rat model of type 2 diabetes (T2D). Male Sprague Dawley rats were placed on a high-fat diet and injected with streptozotocin to induce T2D. The rats were then …
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Ab initio simulation and optimization of phonon drag effect for lower-temperature thermoelectric energy
… led to significant advances with a record-high zT above 2. However, the pursuit of higher TE performance at lower temperatures for cooling and refrigeration applications receives much less attention. Today's most widely-used thermoelectric materials below room temperature are still (Bi,Sb) …
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Theoretical investigation of thermoelectric properties of bulk and nano-scaled semiconductors
… thermoelectric industry is to achieve a higher ZT, the dimensionless thermoelectric figure of merit. There are key thermoelectric properties determining the efficiency ZT: Seebeck coefficient, electrical conductivity, and thermal conductivity. This work mainly focuses on strategies to obtain …
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Processing, Structure and Properties of High Temperature Thermoelectric Oxide Materials
… with high dimensionless figure of merit (ZT) values such as Bi2Te3, PbTe, skutterudites, and half-Heusler alloys, are not thermally stable at temperatures approaching 500°C or higher, due to the presence of volatile elements. Oxide thermoelectric materials are considered to be potential …
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New Approaches To Chalcogenide Materials For Thermoelectrics: Lead Telluride-Based Nanostructures And Facile Synthesis Of Tetrahedrite And Doped Derivatives
… commonly rated by the figure of merit, ZT=T2/tot. The ZT includes as the Seebeck coefficient, as electrical resistivity, T as the average temperature, and tot as total thermal conductivity. tot is the sum of electronic charge carrier (C) and lattice (L) contributions to …
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Design and Development of Sustainable, Low-Cost, High-Performance Nanomaterials for Thermoelectric and Solar Hydrogen Applications
… strong n-type thermoelectric behaviour with a ZT of 1.37 at 340 K, while CuI showed p-type performance with a ZT of 0.72 at 340 K. Integration into a thermoelectric glazing (TEGZ) prototype produced 14 mV at 340 K and a surface temperature differential of 22.5 °C . Performance was further …
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Investigating KCC2 activity in Amyloid Precursor Protein (APP) associated Alzheimer’s Disease
… Chapter 5 provides supporting evidence for ZT-1a as a potential inhibitor of kinases associated with the signalling pathway that inhibits KCC2 activity. Additionally, ZT-1a modulates the expression and phosphorylation of the APP and Tau proteins. Collectively, this thesis establishes the …
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Thermoelectric properties of silicon-germanium alloys
… is related to the thermoelectric figure of merit ZT, which is proportional to the electrical conductivity, the square of the Seebeck coefficient, and the inverse of the thermal conductivity. Currently, the low ZT values of available materials restrict the large scale applications of this …
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First-principles study of phonon drag effect in SiGe alloys
… materials with large figures of merit zT ([mathematical equation], where S, T, [sigma], K are the Seebeck coefficient, absolute temperature, electrical conductivity and thermal conductivity) are promising candidate materials for efficient solid-state devices for electricity generation, …
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Modeling and characterization of thermoelectric properties of SiGe nanocomposites
… is related to the thermoelectric figure of merit ZT, which is proportional to the electrical conductivity, the square of the Seebeck coefficient, and the inverse of the thermal conductivity. Currently, the low ZT values of available materials restrict the large scale applications of this …
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Thermoelectric Properties of Zr0.5Hf0.5Ni1-xPdxSn0.99Sb0.01 and Effect of Nanoinclusions on Transport Properties of Half Heuslers
… </em></em>is the temperature. Maximizing <em><em>ZT </em></em>is very challenging because of interdependence of parameters, for example, increasing the electrical conductivity by increasing the carrier concentration invariably lowers <em><em>S </em></em>and vice versa. Presently numerous …
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Oxide based thermoelectric materials for large scale power generation
… can be described by its figure of merit, ZT, which is defined as ZT = [alpha]²[sigma]T / [kappa] , where a is the Seebeck coefficient of the material, a is the electrical conductivity and [kappa] is the total thermal conductivity, and T is the temperature. In the past, TE power generation …
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The Fabrication of Thermoelectric Materials Using Functionalised Silicon Nanoparticles
… properties combine to give a figure of merit (ZT) of 0.6 at 300 K. This ZT value is significant for a silicon based material, and comparable to that of other thermoelectric materials such as Mg2Si, PbTe and Si-Ge alloy. To investigate the effects that the doping of ligands have on the …
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Electrical and thermal transport in 2- and 3-dimensional periodic holey silicon
… in an enhanced thermoelectric Figure of merit ZT. However, claims of high ZT are quantitatively misleading since electrical and thermal properties are often characterized on separate samples due to measurement complexity. In the first part of this dissertation, we design, fabricate and employ a …
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