Dissertations / Theses on the topic 'Radiators'
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iyer, vishwanath. "Broadband Impedance Matching of Antenna Radiators." Digital WPI, 2010. https://digitalcommons.wpi.edu/etd-dissertations/388.
Full textLuther, Justin. "Microstrip Patch Electrically Steerable Parasitic Array Radiators." Doctoral diss., University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5984.
Full textPh.D.
Doctorate
Electrical Engineering and Computer Science
Engineering and Computer Science
Electrical Engineering
Checketts, Gus Thomas. "Microchannel Radiator: an Investigation of Microchannel Technology with Applications in Automotive Radiator Heat Exchangers." Thesis, University of North Texas, 2014. https://digital.library.unt.edu/ark:/67531/metadc700005/.
Full textLeupin, Andreas. "Spectral emission and improvement of technical infrared radiators /." [S.l.] : [s.n.], 1989. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=8942.
Full textJuyal, Prateek. "Directive microstrip disc radiators based on TM1m modes." IEEE TAP, 2016. http://hdl.handle.net/1993/32074.
Full textFebruary 2017
Wu, Ziran. "Electromagnetic Crystal based Terahertz Thermal Radiators and Components." Diss., The University of Arizona, 2010. http://hdl.handle.net/10150/195207.
Full textBoo, Joon-Hong. "Transient analysis of heat pipe radiators for space station applications." Diss., Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/19553.
Full textMora, Akhil, and Raghavendra Machipeddi. "Development of Tool in MATLAB for the Durability Prediction of Radiators." Thesis, Blekinge Tekniska Högskola, Institutionen för maskinteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-15653.
Full textGerova, Klementina. "Thermo-fluid effects associated with modelling subscale automotive heat exchangers." Thesis, Cranfield University, 2015. http://dspace.lib.cranfield.ac.uk/handle/1826/9875.
Full textMyhren, Jonn Are. "Potential of Ventilation Radiators : Performance evaluation by numerical, analytical and experimental means." Doctoral thesis, KTH, Strömnings- och klimatteknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-31813.
Full textQC 20110328
STEM Projektnummer:30326-1 Energieffektiva lågtemperatursystem i byggnader
Cooper, James Roger. "Novel wireless sensor configurations incorporating isotropic radiators on conformal artificial magnetic conductors." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/52246.
Full textSmith, Peter. "Moment method analysis of microstrip/stripline fed slot radiators including polarisation agility." Thesis, Heriot-Watt University, 1995. http://hdl.handle.net/10399/744.
Full textLarue, Mathis. "Simulation of the field generated by an array antenna with misplaced radiators." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-278502.
Full textBrierley, Philip David. "Some practical applications of neural networks in the electricity industry." Thesis, Cranfield University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267333.
Full textStrickland, Peter C. (Peter Charles) Carleton University Dissertation Engineering Electrical. "Techniques for the synthesis of wideband, series-fed arrays of microstrip patch radiators." Ottawa, 1989.
Find full textWrighton, Jeffrey Michael. "Charge correlation effects in the broadening of spectral lines from highly charged radiators." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0002280.
Full textJohnson, Dennis R. "Analysis and synthesis of radiative heat transfer in longitudinal fins in free space and non-free space." Thesis, Monterey, California : Naval Postgraduate School, 1990. http://handle.dtic.mil/100.2/ADA236942.
Full textThesis Advisor(s): Kraus, Allan D. Second Reader: Brown, Sue. "June 1990." Description based on signature page. DTIC Identifier(s): Radiators (heating and cooling), radiative transfer, heat transfer (radiation). Author(s) subject terms: Radiative heat transfer, longitudinal fins, free space and non-free space. Includes bibliographical references (p. 147-148). Also available online.
Osz, Katalin. "Improvisatory home heating : the gap between intended and actual use of radiators and TRVs." Thesis, Loughborough University, 2016. https://dspace.lboro.ac.uk/2134/21742.
Full textHirayama, Y. "Heat and mass transfer regimes for room cooling and dehumidification using chilled water radiators." Thesis, Cranfield University, 1998. http://hdl.handle.net/1826/4028.
Full textBrokaw, Wendell. "SOLUTION OF ELECTROMAGNETIC SCATTERING PARAMETERS AND RADIATION PATTERNS OF ARBITRARY BODY OF REVOLUTION RADIATORS." Doctoral diss., University of Central Florida, 2005. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3546.
Full textPh.D.
Department of Electrical and Computer Engineering
Engineering and Computer Science
Electrical Engineering
Smith, Steven M. "The use of electrical transmission line theory to predict the performance of spacecraft radiators." Thesis, Monterey, California. Naval Postgraduate School, 1992. http://hdl.handle.net/10945/27324.
Full textTait, Jan. "An electro-optic measurement system for electric fields near RF and microwave radiators and scatterers." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/51596.
Full textENGLISH ABSTRACT: An electro-optic sensor system was developed which uses the modulated scatterer technique [1] to measure the fine structure-amplitude and phase-of electric fields with the minimum of perturbation. The theory for the technique is discussed in detail, with the Lorentz Reciprocity theorem as foundation. The system is also treated as a general two port and solved in terms of the impedances present. This comprises self impedances and mutual impedances. The signals scattered by the dipole scatterer are modeled as amplitude modulated signals and a detailed detection scheme is presented. The detection of the signals is done by a digital correlation process. This is quite similar to synchronous detection. A detailed sensitivity analysis is presented that was used to determine the quality of the system. This analysis is backed by a practical sensitivity measurement. A few antennas and scatterers are measured in the X-band using the system, and results are compared with theory. These systems include a pyramidal horn, an E-plane sectoral horn and a simple waveguide. Half plane diffraction by a metal sheet is also presented. The practical implementation of the theory is emphasized.
AFRIKAANSE OPSOMMING: 'n Elektro-optiese meetsisteem is ontwikkel wat die gemoduleerde strooier tegniek [11 gebruik om die fyn struktuur-amplitude en fase-van elektriese velde te meet. Hierdie tegniek versteur die velde minimaal. 'n Volledige ondersoek word gedoen na die teorie van die stelsel. Die basis van die metode Ie in die Lorentz Resiprook teorie. Alhoewcl daar gekonsentreer word op hierdie teorie, is die stelsel ook beskou as 'n tweepoort. Die wedersydse en ei impedansies van die verskillende komponente word gebruik om die velde op te los. Die gestrooide seine, as gevolg van die dipool strooier, word gemodelleer met b hulp van amplitude modulasie. Die deteksie van hierdie seine word deeglik bespreek. In plaas van 'n analoogstelsel, word 'n digitale korrellasie proses gebruik om die velde te meet. Di sensitiwiteit van die stelsel word geanaliseer. Verder word metings met di stelsel gen em om die teoretiese analise te staaf. 'n Paar X-band sisteme word gebruik om metings te neem. Hicrdi metings word ook vergelyk met teor ti se resultate. Stelsels wat gemeet is sluit die volgencle in: 'n piramidale horing antenna, 'n E-vlak sektorale horing antenna, 'n X-band golfgeleier en die diffraksi op die rand van 'n plaat. Die praktiese implemcntering van die teorie word beklemtoon.
Gbele, Kokou. "Fabrication of Novel Structures to Enhance the Performance of Microwave, Millimeter Wave and Optical Radiators." Diss., The University of Arizona, 2016. http://hdl.handle.net/10150/612886.
Full textPuzella, Angelo. "Theoretical and Experimental Development of an Array of Droopy Bowties with Integrated Baluns." Digital WPI, 2014. https://digitalcommons.wpi.edu/etd-dissertations/313.
Full textZiolkowski, Richard W. "Passive and active metamaterial-inspired nano-scale antennas." IEEE, 2016. http://hdl.handle.net/10150/623141.
Full textSchlub, Robert Walter, and n/a. "Practical Realization of Switched and Adaptive Parasitic Monopole Radiating Structures." Griffith University. School of Microelectronic Engineering, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20040610.112148.
Full textSchlub, Robert Walter. "Practical Realization of Switched and Adaptive Parasitic Monopole Radiating Structures." Thesis, Griffith University, 2004. http://hdl.handle.net/10072/366803.
Full textThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Microelectronic Engineering
Full Text
Bottau, Francesco. "Design and optimization af a race car cooling system." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.
Find full textALVES, RODRIGO M. "Segurança alimentar através da determinação de 2-alcilciclobutanonas em alimentos processados por radiação ionizante." reponame:Repositório Institucional do IPEN, 2016. http://repositorio.ipen.br:8080/xmlui/handle/123456789/26942.
Full textMade available in DSpace on 2016-12-22T12:14:15Z (GMT). No. of bitstreams: 0
A irradiação de alimentos é um meio de preservação de alimentos onde se utiliza uma técnica de processamento que expõe os alimentos a uma radiação ionizante controlada de alta energia. O tratamento realizado com o uso das radiações ionizantes em alimentos tem muitas aplicações tecnologicamente e tecnicamente viáveis incluindo a capacidade de melhorar a segurança microbiológica, reduzir os níveis de bactérias patogénicas, inibir a germinação de tubérculos, aplicação fitossanitária, conservar alimentos armazenados ou a estabilidade de armazenamento e também é utilizada para aumentar a vida de prateleira de determinados produtos devido à redução da contaminação por microrganismos. Em função do aumento do comércio internacional de alimentos e das crescentes exigências regulatórias dos mercados consumidores, cada vez mais países importadores e exportadores têm demonstrando interesse na irradiação de alimentos e desenvolvido pesquisas na aplicação prática desta tecnologia e de métodos de detecção do tratamento. Inúmeras pesquisas foram realizadas mundialmente, resultando em eficientes protocolos para identificar quais alimentos foram ou não irradiados. Até então, o \"mito\" que alimentos irradiados não poderiam ser detectados e que não eram formados quaisquer produtos únicos da radiação foi substituído pelo conhecimento que muitas mudanças podem ocorrer nos alimentos irradiados e essas mudanças poderiam ser utilizadas como ferramentas para identificar essa tecnologia. O processamento por radiação resulta em formações de padrões característicos de hidrocarbonetos saturados, aldeídos, metil e etil ésteres e 2-alcilciclobutanonas, dependendo da composição do ácido graxo do lipídio que compõe o alimento. Com isso a proposta do trabalho foi levantar dados para comparar os efeitos das diferentes doses de radiação gama e de elétrons em alimentos que possuem gordura para verificar as possíveis alterações decorrentes do uso da irradiação, como a presença de 2-Alcilciclobutanonas e também, mostrar os principais equipamentos utilizados para a irradiação de alimentos e suas categorias, com o objetivo de informar o publico em geral.
Dissertação (Mestrado em Tecnologia Nuclear)
IPEN/D
Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP
Skřivánek, Michal. "Ocenění podniku LIPOVICA trade s.r.o." Master's thesis, Vysoká škola ekonomická v Praze, 2008. http://www.nusl.cz/ntk/nusl-15902.
Full textAkrman, David. "Optimalizace topné soustavy v bytovém domě." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-371822.
Full textNg, Eton Yat-Tuen, and eton_ng@hotmail com. "Vehicle engine cooling systems: assessment and improvement of wind-tunnel based evaluation methods." RMIT University. Aerospace, Mechanical and Manufacturing Engineering, 2002. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20080422.100014.
Full textRybář, Jakub. "Sálavé vytápění průmyslových hal." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2012. http://www.nusl.cz/ntk/nusl-225568.
Full textBowen, Mary Elizabeth. "Family Album." ScholarWorks@UNO, 2009. http://scholarworks.uno.edu/td/909.
Full textLadomérská, Jana. "Vytápění objektu zdroji na různé druhy paliv." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227584.
Full textSorge, Wolfram. "Beitrag zur Entwicklung von Störstrahlungstests im Nahfeld großer Prüflinge." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-27018.
Full textIn this work the behavior of radiation emitted by large equipment is investigated. The aim of investigation is to improve existing standardized radiation tests. The radiation from an EUT (equipment under test) placed on reflecting ground is described by the distribution of the electric field strength on a hemispheric test area, which encloses the EUT placed in its center. This kind of area guarantees a nearly equal measurement distance to the EUT from every point defined on it. This distance is defined by the radius of the hemisphere. However, measurement distances according to standards are difficult to realize. Because of practical constraints shorter distances will become useful. This requires a smaller test area, to be scanned more easily. At shorter measurement distances field probes are possibly located in the near field of the EUT. Therefore this work investigates the behavior of the field in the vicinity of the EUT to find an adequate transition point, beyond which, field strength values can be extrapolated to distances instructed by standards with confident results. An important parameter of the field strength distribution is the half-power area. It defines that part of the test area where the radiated power exceeds the half of its maximum. The half-power area is related to the directivity of the EUT, which can be approximated by antenna theory or statistics. If the directivity of the EUT is high, the half-power area is small, and the probability to find the field maximum on the test area is low. The size of the half-power area yields to a least number of observation points, equally distributed on the test area, to find the field maximum with a high level of confidence. If the field strength measured at any observation point is considered, the distance to other observation points can be optimized, and the level of confidence in the test can be increased. As a first step in developing a practicable field scanning method is highlighted: the test wire method. This method establishes a measurement executed by a long wire which covers the EUT. At its terminations current can be measured induced by the radiation. Because the wire is long it is very sensitive. However, if it is longer than one wave length of the radiation, the evaluation of results is difficult because of an uncertain transmission factor. Therefore, some statistic methods are applied to describe the behavior of results and their maxima. Also a system of small probes, e. g. short dipoles, can cover the same part of the EUT as a test wire. The measurement with small probes can be evaluated more easily because of a unique transmission factor. However, their sensitivity is lower
Aygün, Munzur, and Kristian Henriques. "Tilluftsradiatorers påverkan på inomhusklimatet." Thesis, Malmö högskola, Fakulteten för teknik och samhälle (TS), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20644.
Full textIn todays Sweden people spend a lot of time indoors. People living in cities spend about 90% of their time indoors; this includes all the time spent both at home and at work. That amount of time spent indoors means that the indoor climate becomes an important as well as an influential part of everyday life. (NE A). The purpose of this study is to examine the perceived problems with the indoor climate in student apartments that have ventilation radiators. With the help of the queries we identify these problems and ultimately aim to come up with proposals for different solutions. The method for implementing the study will be done with the help of questionnaires in two different student-housing properties, where questions are answered regarding how residents perceive the indoor climate. These responses are then compared with each other to ascertain how they differ and why. The results show that the residents of the Rönnen student housing experience the most problems. This property consists largely of small apartments. Larger apartments dominate Sommarstaden, which is the other surveyed property. The residents of Sommarstaden are experiencing minor inconvenience. These problems may depend on the size of the apartments and/or ventilation radiators that differ between the two properties. Through the results it is apparent that both properties have flaws regarding indoor temperature. In order to improve these flaws information regarding furnishing in an occupied zone should be given to the new occupants. Results show that the ventilation radiators differ between the two properties. Although the ventilation radiators in Sommarstaden could be seen as the better model of the two presented, occupants still feel that the indoor temperature is to cold.
Molnár, Lukáš. "Vytápění bytového komplexu." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265562.
Full textSanz, Aceituno Angel Luis. "Control algorithms for energy savings in irregularly occupied buildings." Thesis, Högskolan i Gävle, Avdelningen för bygg- energi- och miljöteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-15155.
Full textSorge, Wolfram. "Beitrag zur Entwicklung von Störstrahlungstests im Nahfeld großer Prüflinge." Doctoral thesis, Technische Universität Dresden, 2008. https://tud.qucosa.de/id/qucosa%3A25231.
Full textIn this work the behavior of radiation emitted by large equipment is investigated. The aim of investigation is to improve existing standardized radiation tests. The radiation from an EUT (equipment under test) placed on reflecting ground is described by the distribution of the electric field strength on a hemispheric test area, which encloses the EUT placed in its center. This kind of area guarantees a nearly equal measurement distance to the EUT from every point defined on it. This distance is defined by the radius of the hemisphere. However, measurement distances according to standards are difficult to realize. Because of practical constraints shorter distances will become useful. This requires a smaller test area, to be scanned more easily. At shorter measurement distances field probes are possibly located in the near field of the EUT. Therefore this work investigates the behavior of the field in the vicinity of the EUT to find an adequate transition point, beyond which, field strength values can be extrapolated to distances instructed by standards with confident results. An important parameter of the field strength distribution is the half-power area. It defines that part of the test area where the radiated power exceeds the half of its maximum. The half-power area is related to the directivity of the EUT, which can be approximated by antenna theory or statistics. If the directivity of the EUT is high, the half-power area is small, and the probability to find the field maximum on the test area is low. The size of the half-power area yields to a least number of observation points, equally distributed on the test area, to find the field maximum with a high level of confidence. If the field strength measured at any observation point is considered, the distance to other observation points can be optimized, and the level of confidence in the test can be increased. As a first step in developing a practicable field scanning method is highlighted: the test wire method. This method establishes a measurement executed by a long wire which covers the EUT. At its terminations current can be measured induced by the radiation. Because the wire is long it is very sensitive. However, if it is longer than one wave length of the radiation, the evaluation of results is difficult because of an uncertain transmission factor. Therefore, some statistic methods are applied to describe the behavior of results and their maxima. Also a system of small probes, e. g. short dipoles, can cover the same part of the EUT as a test wire. The measurement with small probes can be evaluated more easily because of a unique transmission factor. However, their sensitivity is lower.
Sovák, Nikola. "Vytápění průmyslové haly." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227503.
Full textFornůsek, Patrik. "Vytápění s využitím obnovitelných zdrojů energie." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265554.
Full textHeneková, Barbara. "Vytápění vzdělávacího zařízení." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-371921.
Full textFröling, Douglas. "Developing a User-CenteredInformation Radiator." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-362798.
Full textPyszczyková, Anna. "Vytápění střední školy." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240443.
Full textJanků, Tereza. "Pořizovací a provozní náklady vybraného stavebního objektu." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372217.
Full textBartusek, Jiří. "Dynamika topných ploch a těles včetně regulačních ventilů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231397.
Full textBohutínský, Zdeněk. "Energeticky uvědomělá rekonstrukce rodinného domu." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226851.
Full textDvořák, Václav. "Vytápění staveb. objektu zdroji na různé druhy paliv s vyhodnocením ekonomické výhodnosti." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226821.
Full textBublan, Tomáš. "Vyhodnocení solární soustavy VUT Fast." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226853.
Full text