Dissertations / Theses on the topic 'Pullet'
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Magar, Vivek Dattatray. "Effect of juvenile dietary regime and time of beak trimming on pullet growth, subsequent egg production and incidence of prolapse in Leghorns." Thesis, Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/53229.
Full textMaster of Science
CARLETO, NIVALDO. "Projeto, construção e caracterização de um modulador pulsado para a operação de uma válvula magnetron de potência." reponame:Repositório Institucional do IPEN, 2005. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11275.
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Dissertacao (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
Cohen, Jacob Arthur. "Measuring the electric field of picosecond to nanosecond pulses with high spectral resolution and high temporal resolution." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/37179.
Full textBordyugov, Grigory. "Dynamics and stability of pulses and pulse trains in excitable media." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=981984177.
Full textFernández, González Alma. "Chirped pulse oscillators generating microjoule femtosecond pulses at megahertz repetition rate /." [S.l.] : [s.n.], 2007. http://edoc.ub.uni-muenchen.de/archive/00006967.
Full textFernández, González Alma. "Chirped Pulse Oscillators: Generating microjoule femtosecond pulses at megahertz repetition rate." Diss., lmu, 2007. http://nbn-resolving.de/urn:nbn:de:bvb:19-69673.
Full textBolatbek, Zhanibek. "Detection and Pulse Shaping of Continuous Wave and Pulsed Broadband Light." University of Dayton / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1619634310138999.
Full textSomasundaram, Meena Sivalingam. "Pulsed power and load-pull measurements for microwave transistors." [Tampa, Fla] : University of South Florida, 2009. http://purl.fcla.edu/usf/dc/et/SFE0003293.
Full textChauhan, Vikrant Chauhan Kumar. "Pulse compression and dispersion control in ultrafast optics." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/37153.
Full textBao, Ainan. "Ignition of hydrocarbon fuels by a repetitively pulsed nanosecond pulse duration plasma." Columbus, Ohio : Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1198975288.
Full textNarsetti, Renuka. "Application of pulsed electric fields and magnetic pulse compressor technology in water disinfection." Diss., Columbia, Mo. : University of Missouri-Columbia, 2005. http://hdl.handle.net/10355/5842.
Full textThe entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (January 24. 2007) Includes bibliographical references.
Grenier, Jason. "Design of a MOSFET-Based Pulsed Power Supply for Electroporation." Thesis, University of Waterloo, 2006. http://hdl.handle.net/10012/844.
Full textIn this research, two Metal Oxide Field Effect Transistor (MOSFET)-based pulsed power supplies that are used for electroporation experiments were designed and built. The first used up to three MOSFETs in parallel to deliver high voltage pulses to highly conductive loads. To produce pulses with higher voltages, a second pulsed power supply using two MOSFETs connected in series was designed and built. The parallel and series MOSFET-based pulsed power supplies are capable of producing controllable square pulses with widths of a few hundred nanoseconds to dc and amplitudes up to 1500 V and 3000 V, respectively. The load in this study is a 1-mm electroporation cuvette filled with a buffer solution that is varied in conductivity from 0. 7 mS/m to 1000 mS/m. The results indicate that by controlling the circuit parameters such as the number of parallel MOSFETs, gate resistance, energy storage capacitance, and the parameters of the MOSFET driver gating pulses, the output pulse parameters can be made almost independent of the load conductivity.
Using the pulsed power supplies designed in this work, an investigation into electroporation-mediated delivery of a plasmid DNA molecule into the pathogenic bacterium E. coli O157:H7, was conducted. It was concluded that increasing the electric field strength and pulse amplitude resulted in an increase in the number of transformants. However, increasing the number of pulses had the effect of reducing the number of transformants. In all of the experiments the number of cells that were inactivated by the exposure to the pulsed electric field was measured.
Mukherjee, Anadi. "Two Photon Resonant Picosecond Pulse Propagation in Lithium Vapor." Thesis, North Texas State University, 1987. https://digital.library.unt.edu/ark:/67531/metadc331546/.
Full textLee, Dongjoo. "Ultra-broadband phase-matching ultrashort-laser-pulse measurement techniques." Diss., Available online, Georgia Institute of Technology, 2007, 2007. http://etd.gatech.edu/theses/available/etd-07032007-113912/.
Full textFirst, Phillip, Committee Member ; Adibi, Ali, Committee Member ; Raman, Chandra, Committee Member ; Buck, John, Committee Member ; Trebino, Rick, Committee Chair.
Wang, Ziyang. "Next Generation Ultrashort-Pulse Retrieval Algorithm for Frequency-Resolved Optical Gating: The Inclusion of Random (Noise) and Nonrandom (Spatio-Temporal Pulse Distortions) Error." Diss., Available online, Georgia Institute of Technology, 2005, 2005. http://etd.gatech.edu/theses/available/etd-04122005-224257/unrestricted/wang%5Fziyang%5F200505%5Fphd.pdf.
Full textYou, Li, Committee Member ; Buck, John A., Committee Member ; Kvam, Paul, Committee Member ; Kennedy, Brian, Committee Member ; Trebino, Rick, Committee Chair. Vita. Includses bibliographical references.
Kingsley-Shadish, Antonipillai. "Behaviour of Gammarus pulex (L.) (Crustacea, Amphipoda) in response to intermittent pulses of dissolved copper." Thesis, Imperial College London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248015.
Full textDeutschmann-Olek, Andreas [Verfasser]. "Modeling and Control of Optical Pulse Amplifiers for Ultra-Short Laser Pulses / Andreas Deutschmann-Olek." Düren : Shaker, 2021. http://d-nb.info/1233547895/34.
Full textShreenath, Aparna Prasad. "Measuring broadband, ultraweak, ultrashort pulses." Diss., Available online, Georgia Institute of Technology, 2005, 2005. http://etd.gatech.edu/theses/available/etd-07112005-171551/.
Full textTrebino, Rick, Committee Chair ; First, Phillip, Committee Member ; Ralph, Stephen, Committee Member ; Kennedy, Brian, Committee Member ; Buck, John, Committee Member.
Braun, Michael [Verfasser], Steffen Johannes [Akademischer Betreuer] Glaser, and Kai-Olaf [Akademischer Betreuer] Hinrichsen. "Cooperative Pulses : towards global pulse sequence optimization / Michael Braun. Gutachter: Kai-Olaf Hinrichsen. Betreuer: Steffen Johannes Glaser." München : Universitätsbibliothek der TU München, 2011. http://d-nb.info/101958792X/34.
Full textQin, Yu. "Versatility of nonlinear optical phenomena induced by infrared pulses: application to pulse characterization, element analysis, and filamentation." Kyoto University, 2015. http://hdl.handle.net/2433/200464.
Full textJang, Geon-Ho. "Design and implementation of pulse sequences for application in MRI /." free to MU campus, to others for purchase, 1999. http://wwwlib.umi.com/cr/mo/fullcit?p9953868.
Full textGungulo, Ana Lidia. "Expanding pulse production in Mozambique : identifying constraints and new strategies." Diss., University of Pretoria, 2013. http://hdl.handle.net/2263/41117.
Full textDissertation (MSc Agric)--University of Pretoria, 2013.
gm2014
Agricultural Economics, Extension and Rural Development
unrestricted
Galbraith, Martin Christopher Edward [Verfasser]. "Time-resolved spectroscopy with attosecond pulses and pulse trains: ultrafast relaxation in benzene cations / Martin Christopher Edward Galbraith." Berlin : Freie Universität Berlin, 2017. http://d-nb.info/1124465170/34.
Full textBaksh, Nicholas A. (Nicholas Anwar). "An autocorrelator-interferometer used to determine the pulse width of a pulsed laser used in two-photon endoscopy." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32882.
Full text"May 2005."
Includes bibliographical references (leaf 9).
An autocorrelator-inferometer was designed to correctly assess the pulse width of pulse laser used in two photon endoscopy. The path length of the light was altered using a retro-reflecting corner cube attached to a 6880 galvanometer optical scanner controlled by a 671 series micro-max controller (both products by Cambridge Technologies Inc.) The scanner was selected due to its ability to traverse very small rotations with a constant angular velocity, thereby reducing any non-linearities (with respect to time) in the autocorrelation. The projected results of this autocorrelator suggest it can be used to analyze electromagnetic waves with pulses on the order of a couple picoseconds, however, due to an imbalance of the scanner's shaft, the device was broken before any tests could be performed. A preliminary analysis suggests that a circular shaft attachment could be used to prevent this problem in the future.
by Nicholas A. Baksh.
S.B.
Tang, Suo [Verfasser], and Christoph H. [Akademischer Betreuer] Keitel. "Plasma High Harmonic Generation and Single Attosecond Pulse Emission from Ultraintense Laser Pulses / Suo Tang ; Betreuer: Christoph H. Keitel." Heidelberg : Universitätsbibliothek Heidelberg, 2018. http://d-nb.info/117725266X/34.
Full textKornaszewski, Lukasz. "Novel sources of near- and mid-infrared femtosecond pulses for applications in gas sensing, pulse shaping and material processing." Thesis, Heriot-Watt University, 2008. http://hdl.handle.net/10399/2224.
Full textBowlan, Pamela. "Measuring the spatiotemporal electric." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28188.
Full textCommittee Chair: Rick Trebino; Committee Member: Jennifer Curtis; Committee Member: John Buck; Committee Member: Mike Chapman; Committee Member: Stephen Ralph.
Benwell, Andrew L. "Flashover prevention on polystyrene high voltage insulators in a vacuum." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/5018.
Full textThe entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on March 18, 2008) Includes bibliographical references.
Friedman, Melissa E. "Pulse shaping for broadband photoassociation of cold molecules." Thesis, University of Oxford, 2010. http://ora.ox.ac.uk/objects/uuid:18d49cc2-9146-4ff8-b3b3-9e045bff039c.
Full textGorodi, Suzie Mei. "Pulse, pulse, somersault." AUT University, 2009. http://hdl.handle.net/10292/1006.
Full textKokorin, Denis [Verfasser], and Jürgen [Akademischer Betreuer] Hennig. "Magnetic resonance imaging with spatially-selective pulses using multiple transmission channels = Magnetresonanztomographie mit räumlich-selektiven HF-Pulsen unter Ausnutzung des parallelen Sendens." Freiburg : Universität, 2015. http://d-nb.info/1123482497/34.
Full textJosé, Eduardo Barqueros Muñoz. "Measurement of ultrashort laser pulses using the Second-Harmonic Generation Frequency-Resolved Optical-Gating : Characterization of an ultrashort laser pulse." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for elektronikk og telekommunikasjon, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-19369.
Full textValset, Kjetil. "Vekst av BaSnO med Pulset Laser Deponering." Thesis, Norwegian University of Science and Technology, Department of Electronics and Telecommunications, 2007. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-10391.
Full textI denne Masteroppgaven ble det dannet filmer av BaSnO på substrat av STO og Nb:STO. Filmene ble grodd i serier der parametrene som ble endret var laserfrekvens, lasereffekt(ved 2Hz og 10Hz)og temperaturen til substratet(ved 2Hz og 10Hz). Tykkelsen til de fleste filmene som ble deponert var mellom 200nm-350nm. For substrattemperaturer mellom 500°C-700°C ble det dannet filmer i hva som sannsynligvis er Ruddlesden Popper serien med en maksimal n kalkulert til å være 169 basert på satellittopper funnet i θ-2θ målinger. For filmer med substrattemperaturer i dette området ble det funnet en lineær sammenheng mellom deponeringsraten i Å per sekund og n i Ruddlesden Popper serien. Det ble funnet at den laveste temperaturen som en krystallinsk film kan bli dannet på minker når laserfrekvensen reduseres. Ved en laserfrekvens på 2Hz ble det dannet krystallinske filmer ned mot substrattemperaturer på 450°C. Ingen filmer ble forsøkt dannet under denne temperaturen og 450°C danner derfor ikke ingen nedre grense for vekst av krystallinske filmer av BaSnO. XPS målinger av filmene i laserfrekvensserien viser et fallende Ba/Sn forhold når høyden på lagene i filmene øker, i samsvar med hva man forventer i Ruddlesden Popper serien. Det ble også foretatt SIMS målinger av 3 filmer i laserfrekvensserien som avslørte at forholdet mellom Ba og Sn er stabilt igjennom hele filmen. SIMS målingene avslørte også Strontium forurensninger i ildematerialet og i filmene. For filmer med substrattemperaturer rundt 780°C ble satellittoppene svakere, muligens på grunn av en overgang fra 2D vekst til 3D vekst. Når laserenergien ved denne temperaturen ble senket ble det dannet filmer av hva som mest sannsynlig er 113 fasen til BaSnO. Det ble foretatt lekkasjestrømmålinger av en film i Ruddlesden Popper serien og lekkasjestrømmer på 1 A/ ble funnet. Det ble også foretatt annealing ved 400°C og 800°C på en av filmene. Dette reduserte intensiteten til satellittoppene i θ-2θ målingene litt da Ruddlesden Popper enhetscellene da går fra å stå ut av planet til å ligge i planet på filmen.
Takayanagi, Jun, Norihiko Nishizawa, Hiroyuki Nagai, Makoto Yoshida, and Toshio Goto. "Generation of high-power femtosecond pulse and octave-spanning ultrabroad supercontinuum using all-fiber system." IEEE, 2005. http://hdl.handle.net/2237/6770.
Full textFernelius, Mark H. "Effect of Full-Annular Pressure Pulses on Axial Turbine Performance." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/3825.
Full textRolong, Andrea. "Tissue Engineered Scaffolds and Three Dimensional Tumor Constructs to Evaluate Pulsed Electric Field Treatments." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/97320.
Full textPh. D.
Kadja, Tchamie. "Chip Scale Tunable Nanosecond Pulsed Electric Field Generator for Electroporation." University of Dayton / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1556028923379642.
Full textRondani, Bruno. "Projeto, desenvolvimento e construção de um modulador de pulso estado-solido para transmissores pulsados de alta potencia." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/261786.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação
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Resumo: Descreve-se neste trabalho o desenvolvimento de uma topologia de modulador de pulso estado-sólido e a linha de retardo modular, para aplicação em transmissores pulsados de alta potência que utilizem válvulas de microondas magnetron empregadas comumente em radares de trajetografia, meteorologia e controle de tráfego aéreo. A pesquisa abrange o projeto, desenvolvimento e construção de um modulador de pulso destinado à modernização do transmissor do radar de trajetografia Bearn do Centro de Lançamentos de Foguetes da Barreira do Inferno, Natal -RN. O equipamento desenvolvido fornece pulsos de até 37,5kV e 60A em três modos de transmissão, a saber: monopulso longo, monopulso curto e bipulso. No modo monopulso longo, a largura de pulso é de 1,7µs e nos outros dois modos, 0,85µs. A taxa de repetição dos pulsos é de 585,5Hz. A unidade de modulação de pulso consiste de oito módulos de chaveamento em paralelo, conectados ao primário de um transformador de pulso de razão 1:50. Cada módulo contém dois trechos de linha de retardo e duas chaves estado-sólido e é capaz de gerar pulsos de até 790V e 390A nos diferentes modos de operação. A alimentação da linha de retardo é feita através de um circuito de carga composto por um indutor de alimentação e um circuito de Clipper. O indutor de alimentação faz com que a tensão de carga na linha seja dobrada em relação à tensão contínua presente na saída da fonte de alimentação de entrada, devido à ressonância série criada entre esse indutor e a capacitância total das linhas de retardo. O circuito de Clipper garante a regulação de tensão pulso a pulso e a proteção do modulador contra surto de sobre-corrente na carga e sobre-tensão nas linhas de retardo. Esta topologia foi desenvolvida para melhorar a confiabilidade e facilitar a manutenção dos transmissores de radar com a implementação do conceito de degradação suave (graceful degradation) do modulador de pulso
Abstract: This work describes the development of a modular line-type solid-state pulse modulator topology to be applied in magnetron pulsed power radar transmitters, commonly found on tracking, weather and air traffic management radars. This research includes the design, development and assembling of a pulsed modulator for the Barreira do Inferno Launching Center (CLBI, Natal-RN) Bearn tracking radar upgrade program. The equipment developed provides pulses of 37.5 KV and 60 A in three transmission modes: single long pulse, single short pulse and bipulse. In the single long pulse the pulse width is 1.7 µs and in the other modes 0.85 µs. The pulse repetition frequency is of 585.5Hz. The modulator unit is composed by eight switching modules connected in parallel with the primary windings of a 1:50 ratio pulse transformer. Each module has two pulse-forming network and two IGBT switches and it is capable of handling 790 V and 390 A in the three operational modes. An inductor and a Clipper circuit implement the pulse-forming network charging. The charging inductor allows charging the pulse-forming network with twice the supply voltage since there is a resonance with the total modulator capacitance. The Clipper circuit assures the pulse-to-pulse charging voltage regulation and protects the modulator against load over-current and over-voltage charging. This topology was developed to improve reliability and maintainability of radar transmitters by implementing the graceful degradation (soft failure mode) in the pulse modulator
Mestrado
Sistemas e Controle de Energia
Mestre em Engenharia Elétrica
MACHADO, LEANDRO M. "Microusinagem de dielétricos com pulsos laser de femtossegundos." reponame:Repositório Institucional do IPEN, 2012. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10119.
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Tese (Doutoramento)
IPEN/T
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
FAPESP:08/00284-0
Lindblom, Adam. "Inductive Pulse Generation." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-6699.
Full textLanz, B. (Brigitte). "Compact current pulse-pumped GaAs–AlGaAs laser diode structures for generating high peak-power (1–50 watt) picosecond-range single optical pulses." Doctoral thesis, Oulun yliopisto, 2016. http://urn.fi/urn:isbn:9789526213569.
Full textTiivistelmä ”Gain switching” (vahvistuskytkentä) on tunnettu tekniikka lyhyiden (<100 ps) optisten pulssien generoimiseen laserdiodeilla. Kaupallisia laserdiodirakenteita käyttäen optinen energia rajoittuu kuitenkin 10…100 pJ:n tasolle. Tällöinkin, erityisesti suurilla energiatasoilla, optisessa pulssissa ilmenee voimakkaita jälkioskillaatioita. Tässä väitöskirjassa tutkittiin ja kehitettiin kokeellisesti varmennettuja laserdiodilähetinrakenteita tavoitteena saavuttaa >1 nJ:n optisen pulssin energia ja ~100 ps:n pulssinpituus gain-switching -toimintamoodissa. Tavoitteena oli myös minimoida jälkipulssien energia. Tutkimuksen pääsisältönä on kaksi toimintaperiaatetta: Toisessa tekniikassa päähuomio kohdistuu laseridiodin virta-ajuriin, johon kehitettiin elektroniikka, joka kykenee tuottamaan nopeita virtapulsseja laajalla pulssivirta-alueella. Virtapulssin nopeuden kasvattamisen (<1 ns) osoitettiin edistävän gain switching -ilmiötä. Toisena tekniikkana tutkittiin räätälöityä laserdiodirakennetta, joka sisäisen toimintansa perusteella tuottaa dynaamisessa ohjaustilanteessa tehokkaan ja nopean laserpulssin. Kummankin periaatteen osoitettiin toimivan huonelämpötilassa (23±3°C) ilman erillistä jäähdytystä. Ensimmäisessä ratkaisussa käytettiin nopeaa gallium-arsenidi (GaAs) -avalanchetransistoria virtakytkimenä, jolla saavutettiin <1 ns FWHM injektiovirtapulssi 10 A:n virtatasolla. Tällainen virtapulssi on riittävän lyhyt virittämään ”gain switching” -ilmiön nJ-energiatasolla. Lupaavin rakenne toiseksi ratkaisuksi oli reunaemittoiva puolijohdelaseri, jossa epäsymmetrinen aaltoputki ja aktiivinen alue ovat sijoitettu normaalista laserdiodirakenteesta poiketen rinnakkain. Tällä rakenteella voitiin tuottaa ~100 ps levyisiä (FWHM) ja >3 nJ optisen kokonaisenergian omavia laserpulsseja edullisella pii-pohjaisella (Si) elektroniikalla luoduilla 1.5–2 ns:n (FWHM) ≤17 A injektiovirtapulsseilla. Suorituskykyä saatiin edelleen parannettua istuttamalla saturoiva absorbaattori (SA) laserin optiseen onteloon. Tämän osoitettiin vähentävän jälkioskillaatioiden muodostumista
Bendixsen, Luis Sebastian Caballero. "The design and construction of a compact, high-current pulsed power generator based on multiple low impedance pulse forming lines and networks." Thesis, University of Oxford, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.526548.
Full textPiggott, Alfred J. III. "Transient thermoelectric supercooling| Isosceles current pulses from a response surface perspective and the performance effects of pulse cooling a heat generating mass." Thesis, Michigan Technological University, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10004791.
Full textWith increased public interest in protecting the environment, scientists and engineers aim to improve energy conversion efficiency. Thermoelectrics offer many advantages as thermal management technology. When compared to vapor compression refrigeration, above approximately 200 to 600 watts, cost in dollars per watt as well as COP are not advantageous for thermoelectrics. The goal of this work was to determine if optimized pulse supercooling operation could improve cooling capacity or efficiency of a thermoelectric device. The basis of this research is a thermal-electrical analogy based modeling study using SPICE. Two models were developed. The first model, a standalone thermocouple with no attached mass to be cooled. The second, a system that includes a module attached to a heat generating mass. With the thermocouple study, a new approach of generating response surfaces with characteristic parameters was applied. The current pulse height and pulse on-time was identified for maximizing Net Transient Advantage, a newly defined metric. The corresponding pulse height and pulse on-time was utilized for the system model. Along with the traditional steady state starting current of Imax, Iopt was employed. The pulse shape was an isosceles triangle. For the system model, metrics new to pulse cooling were Qc, power consumption and COP. The effects of optimized current pulses were studied by changing system variables. Further studies explored time spacing between pulses and temperature distribution in the thermoelement. It was found net Q c over an entire pulse event can be improved over Imax steady operation but not over steady I opt operation. Qc can be improved over Iopt operation but only during the early part of the pulse event. COP is reduced in transient pulse operation due to the different time constants of Qc and Pin. In some cases lower performance interface materials allow more Qc and better COP during transient operation than higher performance interface materials. Important future work might look at developing innovative ways of biasing Joule heat to Th.
Lauvmo, Stig. "Syntese av komplekse oksider med pulset laser deponering." Thesis, Norwegian University of Science and Technology, Department of Electronics and Telecommunications, 2006. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-10301.
Full textNorges første pulset laser deponerings (PLD) lab ble påbegynt høsten 2005 av NTNU i samarbeid med Sintef og ble ferdigstilt våren 2006. Pulset laser deponering brukes til deponering av komplekse oksider som SrRuO3(SRO) og BaTiO3(BTO), deponeringsmetoden til PLD er en fysikalsk fordampnings deponering. Metoden fungerer ved at pulset laserstråle slår løs targetmateriale som deponeres som en tynnfilm på et nærliggende substrat. PLD laben består av en laser, to deponeringskammere, Sintef og NTNU kontrollerer hvert sitt, optikk for styring av laserstrålen og måleutstyr som strålingstermometer og wattmeter. For å kontrollere PLD parametrene som brukes under deponering brukes det et PC program. All kommunikasjon mellom PC og kammer gjøres gjennom en hylle på RS484 protokollen. Programvare, hylle og kammer er levert av Twente Solid State Technology (TSST). Bestemmelse av vekstparameter for tynnfilmer av henholdsvis SRO og BTO ble gjennomført i begge kammerene. Karakterisering ble gjennomført på alle tynnfilmene ved hjelp av røntgendiffraksjon (XRD) og atomærkraft mikroskopi (AFM). Antall atomlag(N), avstanden mellom atomlagene(c) og full bredde halv maksimum (FWHM) verdien ble funnet ved hjelp av XRD. Ved hjelp av AFM ble kvaliteten til overflaten observert og stegstørrelsen ble bestemt. Ideell veksttemperatur i Sintef kammeret ble funnet ved at SRO tynnfilmer ble grodd ved 5 forskjellige temperaturer 600, 650, 700, 750 og 800 °C. Ut fra resultatene til denne serien ble det bestemt at tynnfilmen grodd ved en temperatur på 700 °C ga best kvalitet. Ved denne temperaturen ble en jevn terrassestruktur observert med en steghøyde på 0,356 nm. Resistansen ble målt til 76 Ω over 2 mm av tynnfilmen, resistans målningene ble foretatt ved hjelp av et multimeter. Vekstparametrene til BTO ble bestemt i NTNU kammeret. Temperaturen ble satt til 700 °C mens laserenergien og oksygentrykket ble forandret. Laserenergien måtte bli redusert med 2 halvbølgeledere for å få effekten lav slik at tynnfilmene ikke ble for tykke, laserenergien ble redusert til 0,18 W. Filmer grodd ved en laserenergi på 0,18 W og trykk på 5∙E-3 mbar produserte tynnfilmer med en jevn overflate. FWHM av BTO filmene varierte mellom 0,02° og 0,03°, som indikerte tynnfilmer av god krystallinks orden.
Grepstad, Jon Olav. "Tynnfilmepitaksi ved pulset laserdeponering av SrRuO3 : En vekstparameterstudie." Thesis, Norwegian University of Science and Technology, Department of Electronics and Telecommunications, 2007. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-10392.
Full textTynnfilmepitaksi ved pulset laserdeponering av SrRuO3 på TiO2-terminert (001)-orientert SrTiO3-substrat, er i dette arbeidet undersøkt over et stort spekter av deponeringssystemets vekstparametere. Veksten er overvåket ved in situ målinger med elektronstrålediffraksjon (RHEED). Det er vist at tilnærmet perfekt epitaksi er mulig i flere begrensede områder i parameterrommet, der reproduserbarhet hovedsakelig er begrenset av parameterne trykk og temperatur. Resultatene antyder at dette har sammenheng med at kravet til nøyaktig reprodusering av ablasjonsforhold vil variere avhengig av hvor, i spekteret av trykk og temperatur, veksten foregår. Arbeidet omfatter også en undersøkelse av instrumentering. Optimalisering av temperaturmålinger med pyrometer, limeprosedyre og innstilling av laserenergitetthet på target er gjort. Resultater fra denne undersøkelsen viser at deponeringstemperaturen er reproduserbar med ±13 °C og at laserenergi-tettheten på target er usikker. En rekke tiltak som kan minimere usikkerheten i laserenergitettheten er gjennomgått.
Burgess, A. D. "Food restriction, growth and carcass composition of pullets." Thesis, University of Nottingham, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376399.
Full textKong, Lingyuan. "Coupled belt-pulley mechanics in serpentine belt drives." The Ohio State University, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=osu1069789616.
Full textArena, Christopher Brian. "Advancements in Irreversible Electroporation for the Treatment of Cancer." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/50605.
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Ivey, Jill Winters. "Investigating the Applications of Electroporation Therapy for Targeted Treatment of Glioblastoma Multiforme Based on Malignant Properties of Cells." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/78806.
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Antelmann, Olivia. "Erkennung und Charakterisierung gefährlicher selbstzersetzlicher Substanzen." [S.l.] : [s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=963194291.
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