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Dissertations / Theses on the topic 'Smps'

Author: Grafiati
Published: 4 June 2021
Last updated: 26 July 2025

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1

Chew, W. M. "Optimum electromagnetic design for wound components in SMPS applications." Thesis, University of Bath, 1989. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328339.

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2

Chen, Yen-Ming. "RC Snubber Design using Root-Loci Approach for Synchronous Buck SMPS." Thesis, University of Waterloo, 2005. http://hdl.handle.net/10012/963.

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This thesis presents an analytical approach using Root-Loci method for designing optimum passive series RC snubbers for continuous-current synchronous buck switch mode power supply (SMPS). Synchronous buck SMPS is the most popular power converter topology found in modern consumer electronics. It offers relatively good efficiency to target the high-current and low-voltage requirements while it is also relatively inexpensive to implement. Passive series RC snubbers are simple, efficient and cost-effective open-loop equalizer circuit for synchronous buck SMPS. Its purpose is t
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3

Hippold, Judith, and Gudula Rünger. "Task Pool Teams for Implementing Irregular Algorithms on Clusters of SMPs." Universitätsbibliothek Chemnitz, 2006. http://nbn-resolving.de/urn:nbn:de:swb:ch1-200600537.

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The characteristics of irregular algorithms make a parallel implementation difficult, especially for PC clusters or clusters of SMPs. These characteristics may include an unpredictable access behavior to dynamically changing data structures or strong irregular coupling of computations. Problems are an unknown load distribution and expensive irregular communication patterns for data accesses and redistributions. Thus the parallel implementation of irregular algorithms on distributed memory machines and clusters requires a special organizational mechanism for a dynamic load balance while keeping
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4

Ebersson, Joel. "Design och konstruktion av laborationsutrustning till en kraftelektronikkurs." Thesis, Uppsala University, Electricity, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-131542.

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<p>The purpose of this degree project was to build laboratory equipment for a new course in power electronics that starts this autumn 2010 at Uppsala University. The equipment is intended for student labs and it covers the most important areas of the course including rectifying, buck-/boost-converters and PWM-modulation. It is built as one sealed unit where all the electronics are built-in but visible and it has a connection board where students safely can connect the different circuits. The project has advanced from theoretical studies of circuit design, choosing of components and simulations
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5

Akram, Farhan. "Gate driver solutions for high power density SMPS using Silicon Carbide MOSFETs." Thesis, Mittuniversitetet, Institutionen för elektronikkonstruktion, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-41188.

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Discrete silicon carbide (SiC) power devices have unique characteristics that outpace those of silicon (Si) counterparts. The improved physical features have provided better faster switching, greater current densities, lower on-resistance, and temperature performances. However, there is lack of suitable commercial gate drivers that are compatible for high-voltage, and high-speed devices. There has been a great research effort required for the advancement of gate drivers for high voltage SiC transistors. A drive circuit for a SiC MOSFET needs to be optimized in normal operation to give best eff
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6

Guo, Shuibao. "High performance digital controller for high-frequency low-power integrated DC/DC SMPS." Lyon, INSA, 2009. http://theses.insa-lyon.fr/publication/2009ISAL0033/these.pdf.

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Bien qu'un sujet de recherché important, le contrôle numérique n'a pas encore été appliqué en pratique aux convertisseurs de tension à découpage basse-puissance. Les appareils portables sont encore conçus avec des convertisseurs de tension à boucle de contrôle analogique. Ceci est dû à la complexité de l'implémentation d'un contrôleur numérique, aux contraintes de coût et l'absente d'architecture de contrôleur ayant prouvé leur efficacité pour de hautes fréquences de découpage. Les compromis entre performances, consommation, coût silicium limitent encore le développement des contrôleurs numéri
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7

Kotte, Hari Babu. "High Speed (MHz) Switch Mode Power Supplies (SMPS) using Coreless PCB Transformer Technology." Licentiate thesis, Mittuniversitetet, Institutionen för informationsteknologi och medier, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-13964.

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The most essential unit required for all the electronic devices is the Power Supply Unit (PSU). The main objective of power supply designers is to reduce the size, cost and weight, and to increase the power density of the converter. There is also a requirement to have a lower loss in the circuit and hence in the improvement of energy efficiency of the converter circuit. Operating the converter circuits at higher switching frequencies reduces the size of the passive components such as transformers, inductors, and capacitors, which results in a compact size, weight, and increased power density o
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8

Gibson, Courtney R. "Impact of communication layer performance on shared virtual memory protocols for clusters of SMPs." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0020/MQ53432.pdf.

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9

Hoagland, Richard W. "Switchmode Power Supply Miniaturization with Emphasis on Integrated Passive Components on Prefired High Performance Ceramic Substrates." Diss., Virginia Tech, 1999. http://hdl.handle.net/10919/28732.

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This Dissertation is a study of Switched Mode Power Supply (SMPS) miniaturization and how to effectively use the available technologies to achieve the ultimate goal of a reduced size without loss of functionality while maintaining a cost effective design. This research investigates several methods used to obtain low loss, highly compact power supplies. Within these constraints, the Dissertation investigates the issues of design, materials, and cost in order to design and achieve these miniaturized power supplies. This research addresses high performance ceramic, passive component integrat
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10

Kelm, Jonathon. "Modeling and Control Strategies for Multiprocess Arc Welding Power Sources." Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case1574659504446931.

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11

Santoro, Andreia [UNESP]. "Identificação de Single Nucleotilde Polymorphisms (SMPs) no gene Nove-cis-epoxicaroteníde dioxigenase (NCED) em Eucalyptus." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/92455.

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Made available in DSpace on 2014-06-11T19:26:03Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-12-17Bitstream added on 2014-06-13T20:14:33Z : No. of bitstreams: 1 santoro_a_me_botib.pdf: 947565 bytes, checksum: 9b8b73aa8568ce2e4062e8221c067755 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Florestas de eucalipto no Brasil estão entre os ecossistemas mais produtivos do mundo. A madeira do eucalipto é principalmente utilizada pelas empresas de papel e celulose. Contudo, fatores abióticos e bióticos afetam a expansão dessas florestas. A disponibilidade d
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Santoro, Andreia. "Identificação de Single Nucleotilde Polymorphisms (SMPs) no gene Nove-cis-epoxicaroteníde dioxigenase (NCED) em Eucalyptus /." Botucatu : [s.n.], 2010. http://hdl.handle.net/11449/92455.

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Orientador: Celso Luís Marino<br>Banca: Fábio Tebaldi Silveira Nogueira<br>Banca: Mario Luiz Teixeira de Moraes<br>Resumo: Florestas de eucalipto no Brasil estão entre os ecossistemas mais produtivos do mundo. A madeira do eucalipto é principalmente utilizada pelas empresas de papel e celulose. Contudo, fatores abióticos e bióticos afetam a expansão dessas florestas. A disponibilidade de água é uma das maiores limitações para o desenvolvimento das espécies, afetando a produção de biomassa. O hormônio ácido abscísico (ABA) desencadeia respostas de resistência a estresses abióticos, em particula
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13

Mazri, Linda. "Nouveau procédé d’élimination des particules émises par les moteurs Diesel." Thesis, Lyon 1, 2011. http://www.theses.fr/2011LYO10037.

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L’objectif de cette étude était de développer une nouvelle génération de catalyseurs, dits électrochimiques, capables d’abaisser la température de régénération des filtres à particules, et de diminuer les coûts du post-traitement des moteurs Diesel, en évitant notamment une surconsommation en carburant. Pour cela, un banc de mesure a été développé où de forts moyens analytiques pour les phases gazeuses (GC et analyseur de NOx), particulaires (spectromètre de masse à aérosols AMS) et de caractérisations physiques des aérosols (SMPS, Scanning Mobility Particle Sizer) ont été couplés. Le catalyse
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14

Schröter, Marc. "Einsatz der SMPS- und Lidar-Messtechnik zur Charakterisierung von Nanopartikeln und gasförmigen Verunreinigungen in der Luft." Berlin Logos-Verl, 2006. http://deposit.ddb.de/cgi-bin/dokserv?id=2820918&prov=M&dok_var=1&dok_ext=htm.

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15

TARHAN, Muhammed Mustafa. "Assessment and Development of Advanced Power Saving and Supply Concepts For Small Automotive Electronics." Thesis, Mittuniversitetet, Avdelningen för elektronikkonstruktion, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-23588.

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With rising fuel prices, increasing electrification, and imminent fines on CO2 emission within the EU, the requirement for energy and cost efficient supply concepts is becomingmore and more important in the automotive industry. This thesis presents an assessmentof, and improvement for energy and cost efficient power supply concepts for low-end automotiveand light e-mobility electronic control units, containing small µCs, and analogand logic components. Specifically, linear regulators, synchronous and non-synchronous buck converters, andswitched capacitor converters are investigated and assesse
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16

Ambatipudi, Radhika. "Multilayered Coreless Printed Circuit Board (PCB) Step-down Transformers for High Frequency Switch Mode Power Supplies (SMPS)." Licentiate thesis, Mittuniversitetet, Institutionen för informationsteknologi och medier, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-13967.

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The Power Supply Unit (PSU) plays a vital role in almost all electronic equipment. The continuous efforts applied to the improvement of semiconductor devices such as MOSFETS, diodes, controllers and MOSFET drivers have led to the increased switching speeds of power supplies. By increasing the switching frequency of the converter, the size of passive elements such as inductors, transformers and capacitors can be reduced. Hence, the high frequency transformer has become the backbone in isolated AC/DC and DC/DC converters. The main features of transformers are to provide isolation for safety purp
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17

Schmidl, Dirk [Verfasser], Matthias S. [Akademischer Betreuer] Müller, and Christian [Akademischer Betreuer] Bischof. "OpenMP scalability limits on large SMPs and how to extend them / Dirk Schmidl ; Matthias S. Müller, Christian Bischof." Aachen : Universitätsbibliothek der RWTH Aachen, 2016. http://d-nb.info/1125911662/34.

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18

Chinembiri, Petsmaster. "The relationship between strategic management practices (SMPs) and the financial performance of multinational corporations (MNCs) in emerging markets." Diss., University of Pretoria, 2010. http://hdl.handle.net/2263/23776.

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Emerging markets (EMs) contribute significantly year-on-year to global gross domestic product (GDP) and continue to offer developed countries huge opportunities such as raw materials and readily available markets for various goods and services produced in developed economies. However, multinational corporations (MNCs) from developed markets operating in emerging countries continue to develop inappropriate perceptions and assumptions influenced by Western imperialist and arrogant attitudes, which carry a very short-term view on the future of developing countries, despite extracting multibillion
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19

Coufal, Martin. "Elektronický světlík." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442516.

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Theoretical part of this thesis describes LEDs and other circuitry used for LED light design. LED light is designed, manufactured and put into operation. This thesis examines possibilities of measuring exterior light and its key parameters. The device uses two sets of LEDs – warm white and cold white to create light with parameters dependent on exterior light. LEDs are driven by constant current sources that are designed, manufactured and examined in this thesis. The device is microprocessor-controlled, which allows to switch between multiple modes of operation. Flyback SMPS is used to power t
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20

Safari, Naeim. "Design of a DC/DC buck converter for ultra-low power applications in 65nm CMOS Process." Thesis, Linköpings universitet, Elektroniska komponenter, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-80395.

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Switching mode DC/DC converters are critical building blocks in portable devices and hence their power efficiency, accuracy and cost are a major issue. The primary focus of this thesis is to address these critical issues.This thesis focuses on the different methods of feedback control loop which are employed in the switching mode DC/DC converters such as voltage mode control and current mode control. It also discusses about the structure of buck converter and tries to find an efficient solution for stepping-down the DC voltage level in ultra-low power applications. Based on this analysis, a 20
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21

Taschner, Matthew John. "The Development of an Electric Tricycle and Buck-Topology-Based Battery Pack Charger." University of Akron / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=akron1320692738.

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22

Marty, Adam J. "Generation and Characterization of Nanoaerosols Using a Portable Scanning Mobility Particle Sizer and Electron Microscopy." Scholar Commons, 2014. https://scholarcommons.usf.edu/etd/5536.

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The purpose of this research is to demonstrate the ability to generate and characterize a nanometer sized aerosol using solutions, suspensions, and a bulk nanopowder, and to research the viability of using an acoustic dry aerosol generator/elutriator (ADAGE) to aerosolize a bulk nanopowder into a nanometer sized aerosol. The research compares the results from a portable scanning mobility particle sizer (SMPS) to the more traditional method of counting and sizing particles on a filter sample using scanning electron microscopy (SEM). Sodium chloride aerosol was used for the comparisons. The sput
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23

Olivík, Lukáš. "Elektromagnetická kompatibilita spínaných napájecích zdrojů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219851.

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The goal of this thesis is to design flyback converter with given parameters complying with standards for electromagnetic compatibility. This thesis describes detailed design of the flyback converter. It summarizes the recommendations for PCB design. Knowledge from number of comparative measurements of the impact of component selection on conducted emission signature was applied during the flyback converter design. Big part of the thesis is aimed on conducted emission measurement and separation of common mode and differential mode emissions. The simple and fast Time domain measurement of condu
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24

Coquelin, Loïc. "Contribution aux traitements des incertitudes : application à la métrologie des nanoparticules en phase aérosol." Phd thesis, Supélec, 2013. http://tel.archives-ouvertes.fr/tel-01066760.

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Cette thèse a pour objectif de fournir aux utilisateurs de SMPS (Scanning Mobility Particle Sizer) une méthodologie pour calculer les incertitudes associées à l'estimation de la granulométrie en nombre des aérosols. Le résultat de mesure est le comptage des particules de l'aérosol en fonction du temps. Estimer la granulométrie en nombre de l'aérosol à partir des mesures CNC revient à considérer un problème inverse sous incertitudes.Une revue des modèles existants est présentée dans le premier chapitre. Le modèle physique retenu fait consensus dans le domaine d'application.Dans le deuxième chap
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25

Meola, Marco. "Design and modeling of a digital controller for multi mode DC-DC convertes." Doctoral thesis, Università degli studi di Trieste, 2010. http://hdl.handle.net/10077/3677.

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2008/2009<br>Convertitori dc-dc in grado di fornire una elevata efficienza per un ampio intervallo di valori di carico trovano il loro impiego in tutte quelle applicazioni dove dispositivi alimentati a batteria vengono utilizzati. In particolare, l’ottimizzazione dell’efficienza di tali convertitori per basse correnti di carico `e uno degli argomenti pi`u stimolanti nella progettazione di convertitori dc-dc. Nei convertitori multi-modo tale efficienza viene massimizzata mediante l’utilizzo di strategie di controllo diverse in funzione della corrente di uscita. In quest’ambito, il control
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26

Garcìa, Lòpez Natxo. "Fine particle emissions from biomass cookstoves : Evaluation of a new laboratory setup and comparison of three appliances." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-136556.

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It is estimated that around three billion people globally rely on traditional usage of biomass to cover their daily energy needs, which causes health and social inequality problems and contributes to global warming. Thus, the study of particle emissions from cookstoves provides important information that can help improve global welfare.   This study aims to (a) evaluate a new laboratory setup for measurement of particle emissions from cookstoves and (b) use this setup to compare the particle emissions from three cookstove appliances that cover the whole spectra of used technologies, namely a 3
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27

Hanžl, Ondřej. "Nabíječka 14,6 V 100 A pro LiFePO4 akumulátor." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2020. http://www.nusl.cz/ntk/nusl-412974.

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This thesis deals with a design, construciton and testing of a switch-mode power supply (SMPS) which is working as a LiFEPO4 battery charger with output current up to 100~A and output voltage up to 14,6~V. The output voltage and current can be regulated by the operator from zero to maximum value. For this SMPS Half-bridge asymmetrical forward converter with two transformers and common output inductor topology is chosen. The control circuits are run by the IC SG3525. Cascaded regulation of output voltage and current is implemented by two discrete operational amplifiers. Undervoltage protection
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28

Andersson, Johan, and Adam Schelander. "Design and verification of automotive power supply." Thesis, Linköpings universitet, Fysik och elektroteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-150147.

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In the current and next generation automotive telematic platforms, high demands are put on high efficiency power supplies. This thesis investigates different switch mode power converter solutions that operates with high efficiency for both low and high power loads. A market survey was conducted alongside meetings with ACTIA Nordic and their subcontractors. Three solutions from the market survey were selected for further investigation. One solution from the investigation was selected and implemented as a demonstration platform for further testing. The result shows a full test sequence for the d
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Doss, Gary Richard Jr. "Novel Intelligent Power Supply Using A Modified Pulse Width Modulator." Wright State University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=wright1253576739.

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30

Bianchi, Jeramie Seth. "Bridgeless Active Power Factor Correction Using a Current Fed Push Pull Converter." DigitalCommons@CalPoly, 2011. https://digitalcommons.calpoly.edu/theses/544.

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ABSTRACT Bridgeless Active Power Factor Correction Using a Current Fed Push Pull Converter Jeramie Seth Bianchi Switched Mode Power Supplies have become increasingly popular for efficient methods of delivering power to an assortment of electronic devices. This thesis proposes a method of using a current fed push pull converter to provide active power factor correction and rectification in a single stage. While most AC-DC converters utilize a bridge rectifier to convert AC-DC and then perform DC-DC conversion, the proposed circuit will utilize its output diodes to perform rectification, thus el
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31

Holden, James Anthony, and jamesholden@netspace net au. "Vaccination Strategies for the Prevention of Swine Dysentery." RMIT University. Applied Sciences, 2006. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20070112.122102.

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The SmpA outer membrane lipoprotein of B. hyodysenteriae has several characteristics that indicate the potential to protect against swine dysentery (SD). It localises to the outer membrane and antibodies directed against SmpA can prevent the growth of B. hyodysenteriae in vitro. There is some variation observed in the distribution and expression of the SmpA lipoprotein, suggesting that vaccination with SmpA may not provide protection against challenge with a heterologous B. hyodysenteriae strain. This study has characterised the variation at the smpA locus, and in the process has identified
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32

Zoccal, João Victor Marques. "Síntese e caracterização de nanopartículas de TiO2 pelo método do precursor polimérico." Universidade Federal de São Carlos, 2010. https://repositorio.ufscar.br/handle/ufscar/4062.

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Маринець, В. О. "Програмно апаратний комплекс масових смс розсилок". Thesis, Чернігів, 2020. http://ir.stu.cn.ua/123456789/23426.

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Маринець, В. О. Програмно апаратний комплекс масових смс розсилок : випускна кваліфікаційна робота : 123 "Комп’ютерна інженерія" / В. О. Маринець ; керівник роботи А. І. Роговенко ; НУ "Чернігівська політехніка", кафедра інформаційних і комп’ютерних систем. – Чернігів, 2020. – 110 с.<br>Об'єктом розробки є програмно апаратний комплекс масових смс розсилок. Метою розробки було створення комплексу зі швидкою маршрутизацією смс повідомлень від постачальника контенту до постачальника послуг. В ході виконання кваліфікаційної роботи був розроблений комплекс для прийому, маршрутизації та відправлен
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34

Karlsson, Fredrik, and Johan Frid. "Monitorering av Bulk-SMS." Thesis, University of Kalmar, School of Communication and Design, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hik:diva-1970.

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<p>SMS-trafiken världen över ökar hela tiden och användningsområdena blir fler. Flera företag har börjat använda SMS som ett medium att kontakta sina kunder, de allra vanligaste brancherna som utnyttjar detta är banker, logistikföretag och läkarmottagningar. När ett företag vill SMSa ut till sina kunder så går SMSet via en aggregatör som har kontakter med flera operatörer. En aggregatörs framgång är beroende av att så många SMS som möjligt kommer fram, för det är på det de tjänar pengar. Denna rapport utreder därför på vilket sätt man kan mäta kvalité på SMS-utskick hos en aggregatör och med k
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Zoccal, João Victor Marques. "Estudo de métodos para a dispersão de nanopartículas de níquel e ferro em suspensão." Universidade Federal de São Carlos, 2015. https://repositorio.ufscar.br/handle/ufscar/7591.

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Submitted by Izabel Franco (izabel-franco@ufscar.br) on 2016-09-30T18:32:13Z No. of bitstreams: 1 TeseJVMZ.pdf: 2731888 bytes, checksum: a756e69d141b297fb91ca74654baab0d (MD5)<br>Approved for entry into archive by Ronildo Prado (ronisp@ufscar.br) on 2016-09-30T19:17:40Z (GMT) No. of bitstreams: 1 TeseJVMZ.pdf: 2731888 bytes, checksum: a756e69d141b297fb91ca74654baab0d (MD5)<br>Approved for entry into archive by Ronildo Prado (ronisp@ufscar.br) on 2016-09-30T19:17:49Z (GMT) No. of bitstreams: 1 TeseJVMZ.pdf: 2731888 bytes, checksum: a756e69d141b297fb91ca74654baab0d (MD5)<br>Made available in
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Hamon, Cécile. "Etude de régulateurs linéaires et à découpage intégrés : Application à la téléphonie portable." Phd thesis, Université de Grenoble, 2001. http://tel.archives-ouvertes.fr/tel-00599163.

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Un facteur clé des systèmes portables, tels que les téléphones mobiles, est l'autonomie de la batterie qui dépend essentiellement de la source d'énergie, mais aussi de la façon dont sont gérés la tension et le courant qu'elle délivre, facteurs relatifs au régulateur et à son rendement. Les autres critères sont bien sûr la compacité et le coût, d'où la nécessité d'intégrer ces régulateurs de tension. Le premier chapitre présente brièvement trois types de régulateurs, ainsi que les contraintes imposées par les composants externes et la technologie de fabrication. Après avoir expliqué l'utilité d
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Alc?ntara, Sara Maria Freitas de. "Desempenho de um painel fotovoltaico de baixa tens?o, acoplado ao prot?tipo de um conversor dc/dc topologia Booster." Universidade Federal do Rio Grande do Norte, 2010. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15632.

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Made available in DSpace on 2014-12-17T14:58:04Z (GMT). No. of bitstreams: 1 SaraMFA.pdf: 4966448 bytes, checksum: 1ef74fa9275b2d2eb81d82fd6bcd301f (MD5) Previous issue date: 2010-06-18<br>Low voltage solar panels increase the reliability of solar panels due to reduction of in series associations the configurations of photovoltaic cells. The low voltage generation requires DCDC converters devices with high efficiency, enabling raise and regulate the output voltage. This study analyzes the performance of a photovoltaic panel of Solarex, MSX model 77, configured to generate an open circuit vol
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Baglan, Fuat Onur. "Design Of An Educational Purpose Multifunctional Dc/dc Converter Board." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/2/12610103/index.pdf.

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In this thesis a multifunctional DC/DC converter board will be developed for utilization as an educational experiment set in the switched-mode power conversion laboratory of power electronic courses. The board has a generic power-pole structure allowing for easy configuration of various power converter topologies and includes buck, boost, buck-boost, flyback, and forward converter topologies. All the converters can be operated in the open-loop control mode with a switching frequency range of 30-100 kHz and a maximum output power of 20 W. Also the buck converter can be operated in voltage mode
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Pacheco, Solange Aparecida. "Perfil imunofenotípico de linfócitos em crianças nascidas de mães com asma e renite alérgica, em Belo Horizonte." Universidade Federal de Minas Gerais, 2003. http://hdl.handle.net/1843/SMES-5XFJLX.

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BACKGROUND: Several reports have established that allergic diseases are increasing worldwide. Despite our knowledge that heredity influences the progress of asthma in childhood, it is been claimed that fetal environmental factors occurring during pregnancy might be of importance for the development of the disease. Attempts to identify a predictive marker of disease development in the cord blood cellularity have given conflicting results. Both proliferative and cytokine responses have been detected in cord blood mononuclear cells (CBMC), suggesting in utero allergen priming. OBJECTIVE: To deter
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Paddock, Catharine A. "Psychosocial factors in SMEs (stress in SMEs)." Thesis, University of Manchester, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.511245.

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Babaie, Meisam. "Reduction of diesel engine exhaust emissions using non-thermal plasma technology." Thesis, Queensland University of Technology, 2015. https://eprints.qut.edu.au/81593/1/Meisam_Babaie_Thesis.pdf.

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Non-thermal plasma (NTP) is a promising candidate for controlling engine exhaust emissions. Plasma is known as the fourth state of matter, where both electrons and positive ions co-exist. Both gaseous and particle emissions of diesel exhaust undergo chemical changes when they are exposed to plasma. In this project diesel particulate matter (DPM) mitigation from the actual diesel exhaust by using NTP technology has been studied. The effect of plasma, not only on PM mass but also on PM size distribution, physico-chemical structure of PM and PM removal mechanisms, has been investigated. It was fo
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Foreman, Mark McKinney. "Control and operation of SMES and SMES/PV systems." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-10062009-020156/.

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Soldo, Yan. "Optimisation de la reconstruction d'image pour SMOS et SMOS-NEXT." Toulouse 3, 2013. http://thesesups.ups-tlse.fr/2120/.

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Dans le cadre général de l'étude du climat, du cycle de l'eau et de la gestion des ressources en eau, le satellite SMOS (Soil Moisture and Ocean Salinity) a été lancé par l'agence spatiale européenne (ESA) en Novembre 2009 pour fournir des cartes globales d'humidité des sols et de salinité des surfaces océaniques. Les mesures du satellite sont obtenues par un radiomètre interférométrique opérant dans la bande passive 1400-1427 MHz (bande L des micro-ondes). Toutefois, dès les premières mesures de l'instrument, de nombreuses Interférences en Radio Fréquence (RFI) ont été observées, malgré les r
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Kotecha, Ramchandra M. "Analysis and Comparison of Popular Models for Current-Mode Control of Switch Mode Power Supplies." Wright State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=wright1300211710.

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Xu, Chenke, and Hao Hu. "Factors influencing SMEs' export performance : A case study of Chinese SMEs." Thesis, Halmstad University, School of Business and Engineering (SET), 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-4786.

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<p>Small and medium-sized enterprises play much more important roles in both domestic and international markets nowadays. The issue that factors influence their export performance (mainly the export sales and profits) also becomes much more attractive these years. The purpose of this thesis is to investigate the factors which influence the SMEs’ export performance and how each factor influences the SMEs’ export performance. This study is built on a modified model of the factors influencing the SMEs’ export performance. The authors use case study to conduct this research, and one company’s (Com
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Schmuck, Ludger, and Veronika Vintish. "SMEs offline: why? : A multiple-case study of Swedish micro SMEs." Thesis, Umeå universitet, Företagsekonomi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-111569.

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The Internet is becoming a more and more influencing factor in our everyday life. It affects many of our daily tasks and it is a determining factor we built our decisions on. Especially in Sweden, retrieving information about products or services online prior to the purchase is a matter of course and emphasizes therefore its importance. A website offers a costefficient potential for smaller firms with limited resources to be visible for consumers and to compete on the larger market. However, the website adoption has been neglected amongst 41% of Swedish micro Small- and Medium sized Enterprise
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Obrovac, Sandqvist Stina, and Linda Åberg. "A Study of How the COVID-19 Pandemic Impacts Swedish SMEs’ Internal Communication." Thesis, Södertörns högskola, Företagsekonomi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-45751.

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A popular area that has increased in interest within the literature of International Business has lately been devoted to the field of international small and medium-sized enterprises (SMEs). Parallelly, the literature concerning uncertainties and crises has also grown, particularly regarding coronavirus disease 2019 (COVID-19). In todays’ highly volatile and fast- changing business environment, managing a crisis is a task many organizations are used to. However, the subsequent consequences that certain crises entail are crucial for an organization to overcome as well as adapt to and handle for
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Hitchen, Emma L. "Open Innovation in SMEs." Doctoral thesis, Universitat de Vic - Universitat Central de Catalunya, 2017. http://hdl.handle.net/10803/458437.

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This thesis focuses on the use of open innovation in SMEs. Open innovation helps to explain how small firms with fewer resources are able to successfully compete against larger firms. This work begins with a literature review, which analyses a decade of research into the topic, and provides a framework to categorise the barriers to open innovation in SMEs. The most frequent barriers found originate within the firm, at an organisational and cultural level. Following this is a quantitative study into the use of IPR, namely patents, industrial designs, trademarks and copyrights, in SMEs. A key re
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Eliasson, Malin, and Senida Smajovic. "CSR Communication & SMEs." Thesis, Jönköping University, JIBS, EMM (Entrepreneurship, Marketing, Management), 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-9433.

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<p> </p><p><strong>Purpose:</strong> The purpose of this thesis is to investigate how SMEs in the Småland region define and communicate their CSR activities towards their stakeholders.</p><p><strong>Background:</strong> Corporate social responsbility is a topic that is widely discussed today. In many cases the CSR agenda has been adopted by many large corporations. However there is a demand from governmental bodies to spread this agenda further to include and engage small-to-medium enterprises (SMEs). The main reason for this approach is due to SMEs being the most frequent type of business in
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samier, suha, and Liang Qian. "Sustainable development in SMEs." Thesis, Mälardalen University, School of Sustainable Development of Society and Technology, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-10062.

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<p>Nowadays, corporate responsibility is not only an issue for large international corporations but also for small- medium sized enterprise (SMEs) with limited resources and less market power. However sustainable development is not a compulsory lesson for SMEs to take, but it is one of the market approaches for a company to thrive and survive. As Donckels represented (1997) that entrepreneurship of SMEs do all their strength to be on its way to the next millennium. The purpose of this thesis is to describe and understand how sustainable business approaches can influence and enhance SMEs develo
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