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 36 for “"VAC"”.
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Stability study in lead-halide perovskite light-emitting diodes
… of this thesis, vapour-assist crystallisation (VAC) technique was developed to stabilise the bromide/chloride (Br/Cl) mixed-halide phase and give spectrally stable emission. It was dis- covered that VAC-treatment slows-down the crystallisation process and promotes a two-step halide …
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High Efficiency Topologies for Dual Voltage Inputs
… the design in Universal Mains (90 – 265 Vac). In this thesis, a novel new solution, named the “Dual Range” (or Dual Voltage), is introduced and explored. The solution suggested is mainly attractive for high-efficiency Universal Mains power supplies by providing a smaller dynamic operating …
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Promoting oxygenation of vacuum packaged fresh pork using soybean leghemoglobin
… 1) polyvinylchloride (PVC) packaged, 2) vacuum packaged (Vac-pack), 3) 0.2 mL of Tris-Buffer, 4) 0.2 mL of high leghemoglobin high pH (HLbHpH), 5) 0.2 mL of high leghemoglobin low pH (HLbLpH), 6) 0.2 mL of low leghemoglobin high pH (LLbHpH), and 7) 0.2 mL of low leghemoglobin low pH …
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Electrical characterization of high temperature superconductors as a function of temperature
… different BSCCO-2223/Ag tapes manufactured by Vacuumschmelze (VAC). The critical currents for the two VAC samples were measured as a function of magnetic field strength. The critical current of each sample was well described by the generalized Kim model. The critical current was also measured …
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Analysis of harmonic distortion in an Integrated Power System for naval applications
… chosen for this study was a three-phase, 4160 VAC, 80 MW power system with a 450 VAC bus to supply traditional ship service loads. Sensitive loads, such as combat systems equipment, are isolated from the harmonic content of the 450 volt bus via solid state inverters. Power generation for this …
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Investigation of the mechanisms of ozone-mediated viral inactivation
… simplex virus type-1 strain McIntyre (HSV-1), vaccinia strain Elstree (VAC), vesicular stomatitis virus strain Indiana (VSV), and influenza A strain (H1N1) A/WS/33] and non-enveloped [human adenovirus type2 (Ad2)] viruses. Plaque reduction and suspension-infection viral antigen assays were used …
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Participants' and implementors' views on the adaptation of the Parenting for Lifelong Health Teen Programme to address both violence against children and violence against women
… addition to its current strength in preventing VAC) and engagement of fathers for the Zimbabwean context. Violence against women (VAW) and violence against children (VAC) intersect in various and damaging ways. Parenting programmes have been identified as a potentially successful way to deal …
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Spiders of alfalfa with notes on the biology of Tetragnatha laboriosa Hentz
… of the four major species were plotted. The D-Vac sampler and the sweep net were the major sampling methods utilized. Fourteen families consisting of 75 genera and 112 identifiable species were found. Tetragnatha laboriosa Hentz, Pachygnatha tristriata Koch, Misumenops asperatus (Hentz) and …
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Population studies of the potato leafhopper, Empoasca fabae (Harris), on alfalfa, Medicago sativa L.
… based on sixty 0.92 m² samples collected with a vacuum backpack insect collector (D-Vac ® manufactured by D-Vac Co., Riverside, Calif.). Developmental rates for eggs and nymphs and ovipositional rates of adult females in laboratory studies were determined at several temperatures. Egg and nymphal …
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Development and analysis of high-frequency, high-density PFC power conversion
… from "universal" ac input voltage (85 - 264 Vac RMS). It is important that these converters have good overall efficiency (~90-95%), and good ac line power factor (>0.9, and ideally >0.95) to better utilize the available energy. This thesis looks into achieving high efficiency, high power …
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Vertical activity, host preference, and population studies of adult Culicoides (Diptera: Ceratopogonidae)
… (Goat-Baited Trap, Black Light Trap, and D-Vac) were employed simultaneously to investigate the seasonal and daily activity patterns of Culicoides and to determine the relative effectiveness of the three methods. The Black Light Trap was the most effective method for most of the species. The …
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UV-sensitivity in quantum gravity and path integral measure [Sensibilità UV in gravità quantistica e la misura del path integral]
… (scala di Planck) nell’energia del vuoto $\rho_{vac}=\Lambda_{cc}/8\pi G$, dove $\Lambda_{cc}$ e $G$ sono rispettivamente la costante cosmologica e la constante di Newton. Il confronto con il valore osservato di $\rho_{vac}$ svela un severo problema di naturalezza, il più severo contributo …
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Structure Borne Noise Analysis Using Helmholtz Equation Least Squares Based Forced Vibro Acoustic Components
… here as the forced vibro-acoustic components (F-VACs). The F-VACs enables one to identify the critical vibration components for sound radiation in a similar manner that modal decomposition identifies the critical natural modes in a structural vibration. Finally, the dominant F-VAC responsible for …
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The Effects of Modified Atmosphere Packaging on Toxin Production by Clostridium botulinum in Raw Aquacultured Flounder Fillets and Fully Cooked Breaded and Battered Pollock Portions
Fish products under vacuum (VAC) and/or modified atmosphere packaging (MAP) conditions can have a significantly extended shelf life. Prevention of toxin production by Clostridium botulinum is essential for processors of VAC and MAP refrigerated fishery products. The objective of this study was to …
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Zelluläre Funktionsstudien zum Wirkungsmechanismus von Shiga Toxinen bei mikro- und makrovaskulären Endothelzelllinien
… um einen weiteren Virulenzfaktor der EHEC, EHEC-Vac, zu charakterisieren. Die Verwendung der IF zeigte, dass die EHEC-Vac-bedingten Vakuolen lysosomalen Ursprungs sind. Final war die Inkubation der Zellen mit EHEC-Vac letal. Die Art des Zelltodes und Hinweise auf die Dynamik der Vakuolenbildung …
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O papel dos agentes microbianos na carcinogênese.
… development of the disease, such as Cag A and Vac A of H. pylori. Therefore , despite the studies conducted, it is no t known exactly how these micro rgani sms actually cause cancers, requiring more research in this area.
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Seasonal abundance and host preference of Culicoides in Virginia: with emphasis on the ecology of Culicoides variipennis (Diptera: Ceratopogonidae)
… The drop trap collected more midges than did the vacuum trap, and the cattle trap collected more midges than did the sheep trap. Culicoides stellifer began host-seeking activity at SS-30 in bait traps and continued to be collected in the blacklight trap the remainder of the night. Earlier in the …
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Terapia Por Pressão Negativa (TPN) vs.Terapia Convencional em Ferimentos Complexos - Revisão sistemática
… English and Spanish. The terms used were: vac, negative pressure and complex wound. Results: Six articles were included for inclusion in this review. From each paper criteria for comparative evaluation of therapeutic modalities were isolated. Discussion: The analysis compared the cost, time …
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Controlled on-time power factor correction circuit with input filter
… of their minimum weight. A regulated 100 W, 120 VAC input and 300 V output power factor correction circuit was implemented on a breadboard. Ridley's small signal switch model [10] for the power factor correction circuit with hysteresis control is successful1y app1ied to this control scheme to …
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The characteristics of postoperative mediastinitis during the changing phases of cardiac surgery
… hoitokeinona mukaan tuli alipaineimuhoito (VAC). Tutkimuksen aikana sydänoperaatioista on tullut entistä monimutkaisempia ja mediastiniittiin sairastuvista potilaista vanhempia ja heillä on entistä useampia perussairauksia. Tästä huolimatta mediastiniitin vuosittainen ilmaantuvuus on …
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