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Zinatelli, Nancy. "End user computing success factors in small firms : a case study and survey of factors affecting EUC success in small firms in New Zealand." Thesis, University of Canterbury. Accounting and Information Systems, 1994. http://hdl.handle.net/10092/2702.
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End User Computing is becoming an increasingly important activity in small firms. This
thesis reports results of an empirical investigation of the factors influencing End User
Computing Success in small businesses. The study proposed a conceptual model which
was based on the Technology Acceptance Model (TAM) theory. Another important
contribution of this study was that it extended previous research by testing a subset of the
TAM in a new context, i.e. small firms. The development and testing of the research model
involved: (1) a pilot case study, (2) a cross-case analysis of eight firms, and (3) a national
survey of 596 computer users. Partial Least Squares was the data analysis technique used
to analyse the survey data. The results of the study indicated that management support,
external support, perceived ease of use, and perceived usefulness had direct positive effects
on EUC success in small firms. Smaller but significant effects were also found for internal
support, internal training, and external training on EVC success. Overall, the results of
the study provided strong support for the TAM theory in a small firm context. Suggestions
for future research and implications for small firm managers, external sources of assistance,
and educational institutions were discussed.
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El, Fettah M'Hammed. "LUMINESCENCE ET TRANSFERT D'ENERGIE DANS RbGd3F10 : Ce3+, Eu2+ ET K2YF5:Tb3+, Eu3+." Clermont-Ferrand 2, 1992. http://www.theses.fr/1992CLF21442.
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CE TRAVAIL EST CONSACRE A L'OPTIMISATION DES FLUORESCENCES U. V DE L'ION Eu2+ ET ROUGE DE L'ION Eu3+ INTRODUITS COMME DOPANT RESPECTIVEMENT DANS LES DEUX FLUORURES Rb(Y,Gd)3Fi10:Ce3+ ET K2YF5:Tb3+, PAR LE BIAIS DE TRANSFERTS D'ENERGIE. L'ANALYSE DES CARACTERISTIQUES SPECTRALES DE Ce3+ ET Eu2+ MONTRE L'EXISTENCE D'UN LEGER TRANSFERT DE Ce3+ VERS Eu2+. EN PRESENCE DE Gd3+ CE TRANSFERT DEVIENT IMPORTANT. K2YF5 EST UN MATERIAU DE STRUCTURE A CARACTERE UNIDIMENSIONNEL. LORSQUE Tb3+ Y EST INTRODUIT, UNE EXTINCTION TRES RAPIDE DE LA LUMIERE PROVENANT DU NIVEAU 5D3 EST OBSERVEE, ET CE POUR DES CONCENTRATIONS FAIBLES. CECI PEUT ETRE EXPLIQUE PAR L'EXISTENCE DE PAIRES Tb3+. L'ION Eu3+ INSERE SUR LE SITE DE L'YTTRIUM DANS K2YF5 PERMET PAR ANALYSE DE LA FLUORESCENCE 5D07FJ, D'IDENTIFIER LA SYMETRIE PONCTUELLE DU SITE A C2V. LORSQUE LES DEUX IONS Tb3+ ET Eu3+ COEXISTENT DANS K2YF5 UN TRANSFERT D'ENERGIE DE Tb3+ VERS Eu3+ EST MIS EN EVIDENCE. LA DYNAMIQUE DE TRANSFERT EST DECRITE EN TERME DE TRANSFERT PAR SAUTS INCOHERENTS DANS LE CADRE DU MODELE DE BURSHTEIN
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Hunt, Trent W. "Common Airborne Processing System (CAPS) 2.0: Data Reduction Software on a Personal Computer (PC)." International Foundation for Telemetering, 1997. http://hdl.handle.net/10150/609756.
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International Telemetering Conference Proceedings / October 27-30, 1997 / Riviera Hotel and Convention Center, Las Vegas, Nevada<br>CAPS 2.0 provides a flexible, PC-based tool for meeting evolving data reduction and analysis requirements while supporting standardization of instrumentation data processing. CAPS 2.0 will accept a variety of data types including raw instrumentation, binary, ASCII, and Internet protocol message data and will output Engineering Unit data to files, static or dynamic plots, and Internet protocol message exchange. Additionally, CAPS 2.0 will input and output data in accordance with the Digital Data Standard. CAPS 2.0 will accept multiple input sources of PCM, MIL-STD-1553, or DDS data to create an output for every Output Product Description and Dictionary grouping specified for a particular Session. All of this functionality is performed on a PC within the framework of the Microsoft Windows 95/NT graphical user interface.
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Soetebier, Frank. "Strukturchemische und magnetische Untersuchungen an Ln3+-ss-́́Al2O3 [Ln3+-beta-́́Al2O3] (Ln=Gd - Ho) und Eu2+/Eu3+-ss-́́Al2O3 [Eu2+ Eu3+-beta-́́Al2O3] mit einem Beitrag über Yb3Cl[SiO4]2, Lu2[Si2O7] und Mn2+-ss-́́Al2O3 [Mn2+-beta-́́Al2O3]." [S.l.] : [s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=967335396.
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Gonizzi, Barsanti Andrea <1987>. "Sintesi e caratterizzazione di fosfori e nanofosfori a base di Sr1.7Mg0.3SiO2:Eu2+,Eu3+ per LEDs a luce bianca." Master's Degree Thesis, Università Ca' Foscari Venezia, 2014. http://hdl.handle.net/10579/5656.
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Caratterizzazione delle proprietà di luminescenza di fosfori e nanofosfori di Sr1.7Mg0.3SiO2 drogati con diversa concentrazione di europio per la produzine di luce bianca partendo da LEDs con emissione UV.
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Ertenberg, Randolph. "CoGe&esc;b1&esc;s&&dotb;esc;b5&esc;sSe&esc;b1&esc;s&&dotb;esc;b5&esc;s [electronic resource] : structural and transport properties characterization / by Randolph Ertenberg." University of South Florida, 2003. http://purl.fcla.edu/fcla/etd/SFE0000130.
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Title from PDF of title page.<br>Document formatted into pages; contains 43 pages.<br>Thesis (M.S.)--University of South Florida, 2003.<br>Includes bibliographical references.<br>Text (Electronic thesis) in PDF format.<br>ABSTRACT: Skutterudites have been of great interest for thermoelectric applications over the last ten years. Scientific interest has focused on the unique transport properties Skutterudites possess due to the unique crystal structure. Technical interest has grown since it was discovered that some compounds rival the current best thermoelectric materials. To further the understanding of this material system, and optimize its thermoelectric properties, the synthesis and characterization of polycrystalline n- and p-type CoGe&esc;b1&esc;s&&dotb;esc;b5&esc;sSe&esc;b1&esc;s&&dotb;esc;b5&esc;s was undertaken. Structural, morphological, chemical, electrical, thermal and magnetic properties were studied. These data are compared to those of the binary Skutterudite CoSb3. The results of this study show a very sensitive dependence of the physical properties on stoichiometry.<br>ABSTRACT: While the thermoelectric figure of merit is low in these materials, it is apparent that optimization via doping and "void filling" will lead to improved thermoelectric properties.<br>System requirements: World Wide Web browser and PDF reader.<br>Mode of access: World Wide Web.
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Branum, Craig E. "esc." ScholarWorks@UNO, 2015. http://scholarworks.uno.edu/td/1960.
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My artwork is about the impact of the digital revolution on every aspect of life, such as relationships, war, and self image. I explore this in the creation of sculptures that represent abstracted globes or video game worlds, digital animations concerning the virtual and simulated, and prints as allegories for embodied post-human experience. The visual themes of my work are bitmapped patterns, early computer graphics, and twenty-sided dice.
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Tenora, Jan. "EMC anténa." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-242175.
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The goal of this master’s thesis was to design antenna working in frequency range from 30 MHz to 1 GHz. Designed biconical antenna requires balanced feed to work properly, therefore designing the balancing unit based on discrete components was necessary. Designed antenna was also constructed and its return loss, gain and radiation patterns were verified by measurement. This master’s thesis also introduces readers into principles of antenna measurements of disturbing signals in the area of EMC and compares different types of antennas for bands of meter and decimeter waves.
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De, la Mata Sáez Lourdes. "Phylogenetic and molecular studies of the populations of Phytophthora ramorum, lineages EU1 and EU2, in Ireland and gene expression during infection of Larix spp." Thesis, Queen's University Belfast, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.705909.
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Phytophthora ramorum is causing major damage to the economy and the natural ecosystems of the countries where it is found. There are four different lineages of P. ramorum: NA1, NA2, EU1 and EU2. EU2 has only been found in Northern Ireland and southwest coast of Scotland The populations EU1 and EU2 on the island of Ireland were studied. The results showed that all the isolates collected from the Republic of Ireland were EU1, as In the rest of Europe and the majority of the Isolates from Northern Ireland and Scotland were EU2. Further study resulted in phylogenetic trees that suggested that the EU1 population in the Republic of Ireland is the result of multiple introductions brought by plant trade from Europe. Additionally! the EU2 population in Northern Ireland is the results of a single Introduction, probably brought from Asia, and then spread across the country. The interaction of P. ramorum with its most affected host In the UK, larch, was studied. High throughput sequencing was performed with Illumlna 2000 Hiseq in European and Japanese larch trees infected with the lineages EU1 and EU2. This showed a larger number of general defence genes activated in European larch against the pathogen, along with a larger number of Inactivated genes In Japanese larch, supporting the idea that European larch is more resistant to P. ramorum. Some defence molecular pathways were studied, showing that European larch activates more genes in each specific pathway. A selection of genes involved in the different defence pathways were studied showing that the highest peak of plant defence against the pathogen occurs 3 days after the inoculation, suggesting that for the plant It Is important to react quickly in order to survive the pathogen attack.
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Yousif, Salwan, and Yoness Maleki. "EMC : Elektromagnetisk kompatibilitet." Thesis, Högskolan i Borås, Institutionen Ingenjörshögskolan, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-19895.
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Almeida, Danielle Silveira de. "Vistos, relatados etc." Florianópolis, SC, 2002. http://repositorio.ufsc.br/xmlui/handle/123456789/84207.
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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Filosofia e Ciências Humanas. Programa de Pós-Graduação em Antropologia Social.<br>Made available in DSpace on 2012-10-20T07:15:59Z (GMT). No. of bitstreams: 1
187614.pdf: 175183 bytes, checksum: f34057b08aef53f26f259deb0d6e9876 (MD5)<br>Neste trabalho realizo a interpretação de decisões acerca de separações conjugais, expressas em acórdãos, em Florianópolis, na década de 90. Sob a luz da antropologia interpretativa analiso a produção de verdades estratégicas a partir da relação/interação entre código/lei escrita e saberes locais/valores sociais, nas construções argumentativas e nas decisões dos desembargadores.
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Edman, Jimmy. "ETC och kommersialiseringen av algbatteriet : Om ETC: s plats i kommersialiseringsprocessen." Thesis, Uppsala universitet, Företagsekonomiska institutionen, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-155886.
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Svensson, Anna, and Gabriella Svensson. "Miljöinvesteringar i EMC-företag." Thesis, Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-19031.
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Alas, Erkan. "EMC - Överhörning mellan ledare." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-128178.
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Detta examensarbete handlar om EMC i allmanhet och overhorning i flatkabel samt ledningar i synnerhet. Arbetsuppgiften gick ut pa att undersoka overhorning i en flatkabel och ett kretskort. EMC, som star for elektromagnetisk kompatibilitet, beskriver mojligheten for elektriska och elektroniska system att fungera utan att stora andra system. Den beskriver aven formagan att fungera pa en angiven elektromagnetisk miljo for elektriska och elektroniska system. Problemet med overhorning i kablar och ledningar ar kant sedan tidigare och inom PCB design ar overhorning ett viktigt EMC problem. Tva undersokningar gjordes dar den forsta undersokningen utfordes pa flatkabeln. Matningar gjordes med ett oscilloskop for att sedan jamforas med teorin i form av berakningar och simuleringar. Detsamma gjordes vid den andra undersokningen med kretskortet dar det efter matningarna utfordes berakningar for att sedan kunna simulera och jamfora praktiken med teorin. Inledningen av rapporten borjar med lite teori om EMC och nagra exempel pa vad overhorning kan orsaka. Darefter visas formler som anvands for berakningarna i bada undersokningarna. I rapportens huvuddel visas resultaten av berakningarna efter matningarna som sedan anvands vid simuleringarna. Efter det jamfors matvardena med simuleringsvardena for bade flatkabeln och kretskortet. En liten beskrivning pa hur kretskortet designades tas ocksa upp. Det hela avrundas med en slutsats dar resultaten diskuteras och undersokningarna jamfors med varandra.<br>This thesis is about EMC in general and crosstalk in flat cable and wiring in particular. The task was to investigate the crosstalk in a flat cable and a circuit board. EMC, which stands for electromagnetic compatibility, describes the ability of electrical and electronic systems to operate without interfering with other systems. It also describes the ability to operate in a specified electromagnetic environment for electrical and electronic systems. The problem of crosstalk in cables and wires is already known and in PCB design, the crosstalk is an important EMC problem. Two surveys were carried out in which the first survey were performed on the flat cable. Measurements were made with an oscilloscope and then compared with the theory in the form of calculations and simulations. The same was done at the second survey with the circuit board where the following measurements were performed calculations to be able to simulate and compare the practice with theory. The beginning of the report begins with some theory of EMC and a few examples of what crosstalk can cause. Then the formulas used for the calculations in both surveys is shown. In the main part of the report, the results of the calculations for the measurements is shown which are then used in the simulations. After that, the measurements is compared with simulation values for both the flat cable and the circuit board. A small description of how the circuit board was designed are also discussed. The whole is rounded off with a conclusion were the results are discussed and the surveys are compared with each other.
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Olivová, Jana. "Multikriteriální optimalizace v EMC." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-233537.
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The work is aimed to propose a methodology for creating an equivalent of composite materials used for construction of small aircraft. Such equivalent should enable to create numerical models of small aircraft in the simulation of precertication EMC tests for aircraft resistance against the lightning. Eliminating situations threatening the aircraft and passengers in the initial steps of the design will allow savings in production costs and contribute to the safety of air transport. In order to nd the equivalent of composite materials, global optimization methods will be used.
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Williams, Diane Keith. "Particle Size Dependence on the Luminescence Spectra of Eu3+:Y2O3 and Eu3+:CaO." Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/29719.
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Since the Eu3+ ion can occupy different cation sites in a host material, it can serve as a useful probe of nanocrystalline structures to gain more insight into the structural changes that can occur when the particle size is reduced from the bulk to nanometer regime. The use of laser spectroscopy to probe two nanocrystalline structures, Eu3+:Y2O3 and Eu3+:CaO, was investigated. The nanocrystalline structures were prepared by the laser-vaporization-gas-phase condensation of the bulk oxides. The particle size distribution and dominant particle diameters of the nanocrystals were determined by transmission electron microscopy.
The particle size dependency results of Eu3+:Y2O3 revealed three distinct phases: (1) the sharp lines of the monoclinic Y2O3 were dominant in the larger particles; (2) the C2 site of the cubic phase, which appears in the smaller particles; and (3) the amorphous phase that increases in intensity as the particle size decreases. The observation of distinct spectral lines from the monoclinic phase confirms the presence of a crystalline phase for all of particle sizes studied.
The site-selective results of various concentrations of 13-nm Eu3+:CaO showed that the laser-vaporization-gas-phase condensation method of preparation produced two europium-containing phases at most concentrations: cubic CaO and monoclinic Eu2O3. Results showed that the monoclinic Eu2O3 phase could be reduced by 95% by annealing at 800 0C for 30 minutes without particle growth.
Since the Eu3+ ion and the Y3+ ion are isovalent, the substitution of a Eu3+ ion into Y2O3 is considered a trivial case of extrinsic disorder since the impurity is neutral relative to a perfect crystal1. As a result, it is not necessary to have any other defects present in the crystals to maintain charge neutrality. With Eu3+:CaO, the dopant and host cation charges are different and therefore the dopant distribution can be investigated by site-selective spectroscopy.
Since the experimental dopant distribution results for nanocrystalline Eu3+:CaO were inconclusive, a model to predict the theoretical change in the dopant distribution in Eu3+:CaO as a function of particle size was developed. The model predicts that the defect chemistry is affected when the particle size is approximately 50 nm and smaller.<br>Ph. D.
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Kharbache, Hayat. "Propriétés de fluorescence de l'ion Eu3+ dans K2(Y, Gd)F5 : analyse des couplages Eu3+-Eu3+ et des mécanismes de division de photons." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2008. http://tel.archives-ouvertes.fr/tel-00728845.
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La spectroscopie de fluorescence induite par laser et par rayonnement synchrotron a été utilisée pour analyser l'intense émission de l'ion Eu3+ dans les fluorures K2YF5 et K2GdF5. L'utilisation conjuguée de la spectroscopie résolue dans le temps, de la variation de la concentration en ions Eu3+ a permis d'identifier les niveaux électroniques de l'ion Eu3+ après excitation dans les niveaux 5D2, 5D1 et 5D0. Les répartitions spectrales de la fluorescence se corrèlent parfaitement avec un ion Eu3+ inséré dans un site de symétrie C1 . A basse température, en dessous de 100 K, des structures satellites apparaissent de part et d'autre des raies principales d'excitation 7F0 -> 5D0-2. L'analyse des évolutions spectrales et temporelles des fluorescences à partir du niveau 5D0 sous excitation sélective dans les raies principales d'excitation et dans les raies satellites en fonction de la température et de la concentration en ion EU3+ a permis d'attribuer les structures supplémentaires à des signatures de paires Eu3+-Eu3+ dont l'existence est favorisée par le caractère unidimensionnel de la structure cristallographique, y compris le composé K2EuF5. Des mécanismes de cascades et de divisions de photons impliquant les ions Gd3+ et Eu3+ ont été identifiés dans K2GdF5 sous excitation VUV. Finalement le caractère unidimensionnel de la structure s'avère être un handicap pour réaliser des luminophores à rendement quantique supérieur à l'unité.
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Feger, Claudia. "Esc impossible - Zum Fortschritt verdammt." Universitätsbibliothek Chemnitz, 2005. http://nbn-resolving.de/urn:nbn:de:swb:ch1-200501690.
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Wiid, P. Gideon. "Investigating cost-effective EMC methods." Thesis, Stellenbosch : University of Stellenbosch, 2005. http://hdl.handle.net/10019.1/1520.
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Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2005.<br>Due to the expensive nature of high frequency measurements in the EMC (Electromagnetic
Compatability) field, more affordable methods of measurement instrumentation and
environments are investigated. Different calibration methods for an Automatic Network
Analyser (ANA) are evaluated against each other to determine the most cost-effective
method of calibration. The mathematics for all the calibration methods are used in
MATLAB programs which perform the error-calculation and correction which is usually
done by the ANA software. These programs can be used to develop a simplified homebuilt
ANA at reduced cost. The MATLAB program calibrations are compared to actual
ANA calibrations to determine accuracy. Different measurement environments are considered
as well to decide on a best compromise between cost and accuracy. To achieve this
a reverberation chamber was built in which measurements were done and compared to
measurements done on an Open Area Test Site. The Device Under Test was a standard
radiator constructed specifically for such measurements. The development of both the
radiator and the reverberation chamber are discussed and all the measurement results are
considered in this thesis.
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Johnston, Erin K. "Characterization of EPC-1/PEDF." Click here for download, 2009. http://proquest.umi.com/pqdweb?did=1711556851&sid=1&Fmt=2&clientId=3260&RQT=309&VName=PQD.
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Švec, Marek. "Měření vlastností stíněných komor EMC." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-217787.
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This Master’s project deals with general aspects and possible solution of effective shielded cover and cell/chamber shielding measurement for needs of electromagnetic compatibility EMC on the basis of available norms and standards. Electromagnetic shielding is one of the most anticlutter means of EMC. Its main task is reduction of disturbing emission at the side of sources of disturbing signals as well as electromagnetic resistance increase at the side of disturbing signal receivers. Shielding is considered to be an important structural means to reduce electromagnetic field referring to a defined space part. Technical means for achieving the given goals are called shielded covers or shielded cells/chambers. Shielding is one of highly effective methods related to electromagnetic protection, for instance against power/output disturbance. To express the shielding quality so called shielding effectiveness SE is used. It represents logarithmic rate of shielding coefficient that is defined by the intensity ratios of electric and magnetic fields in a certain point of the shielded space to electric or magnetic field intensity incident/impinging on the shielded screen or wall.
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Vlčová, Zuzana. "Hodnocení ekonomické efektivnosti EPC projektů." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-225990.
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The issue of energy saving building is a current topic of today. The increasing costs of operating buildings reduce economic efficiency of the organization operations. A large part of the operating cost is energy cost. An effective tool for improving the energy performance of buildings is an EPC method. The implementation of energy projects through EPC is offered by Energy Services Company. This thesis evaluates the economic efficiency of the project implemented by the EPC and analyses its risk factors. The subject of EPC project is modernisation of an energy sector of a hospital building. The economic efficiency of the project is interpreted on the basis of economic indicators Net Present Value, Internal Rate of Return and Profitability Index. There was also performed Monte Carlo simulation supported by Oracle Crystal Ball software within the analysis of risk factors for the project.
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Vídenka, Rostislav. "Některé otázky předcertifikačních testů EMC." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-233518.
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This doctoral thesis deals with EMC pre-compliance testing of radiated disturbance. The thesis summarizes present pieces of knowledge about restricting of disturbing ambient signals and focuses on restricting of test site imperfection influence on the measurement results. Pre-compliance test site “calibration” uses comparison signal sources. There were added up the recommendations for “calibration” steps, too. The semi-anechoic vs. fully-anechoic chambers measurements results were compared. Some methods for dealing with ambient disturbing signals were discussed and high attention was applied to the test site choice and the minimal dimension geometry was recommended. There are presented recommendations for pre-compliance radiated disturbance measurements in the conclusion with the stress on available test equipment.
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Štěpánek, Adam. "Návrh optického převodníku pro EMC." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-241949.
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Master's thesis is focused on designing optical converter for EMC measurement transfering signal through noisy enviroment. First part contains analysis of electromagnetic interference and its coupling and measurement, especially types of probes for interference maesurement. Next part passing through designing of optoelectric and electrooptic converter with digital intensity modulation. Last part is about realization of optical converter.
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Lundberg, Johan. "EMC-problem på kretskort : design, konstruktion och dokumentation av kretskort med avseende på EMC-egenskaper." Thesis, University West, Department of Technology, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-357.
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Hacket, George T. (George Terence). "Liberalisation of air transport in the EEC and its implication for non-EEC European countries." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61159.
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European Economic Area stands for the change of the structure of Europe after the developments it has undergone in recent years.<br>Europe is changing, a new architecture is being put in place, and new responsibilities are being assumed.$ sp1$ The European Economic Community$ sp2$ is progressing towards an integrated internal market. The Member States of the European Free Trade Association$ sp3$ are seeking closer ties with the EEC. With Austria, a fully neutral country applied for Membership in the EEC for the first time. Finally, with the surrender of the communist regimes in Eastern Europe a large number of new countries are seeking after closer ties with the western market areas.<br>These changes did not leave air transport matters untouched. The development towards an internal market has led to substantial changes in the EEC legislation on these external relations. As a concrete outcome of these changes a draft agreement between two EFTA countries and the EEC has been negotiated, which may indicate the form of further cooperation between EEC and non-EEC countries in air transport matters.<br>This thesis was submitted in the summer/autumn of 1991, a few months before the successful negotiation of a European Economic Area (EEA) which embodies such further cooperation. ftn$ sp1$EES - A Historic Step towards a New Europe (3/90) EFTA Bulletin 1 at 1. quad $ sp2$Hereinafter referred to as EEC. quad $ sp3$Hereinafter referred to as EFTA.
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Öhrling, Jenny. "En analys av EPC som modell för energieffektivisering : En djupdykning i energieffektiviseringsåtgärder i Umeå kommuns EPC-projekt för att närmare förstå EPC som projektform vid energieffektivisering." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-105235.
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I detta examensarbete har åtgärder i ett energieffektiviseringsarbete av typen EPC analyserats. Umeå kommuns fastighetsavdelning startade sitt EPC-projekt 2008 syftet att energieffektivisera mer än 130 byggnader. Detta projekt sades då vara det största av sitt slag i Sverige. Bakgrunden till behovet av att utföra detta grundades i att en stor del av de tekniska systemens livslängd i fastigheterna började vara uppnådd samtidigt som ett energieffektiviseringskrav ålades fastighetsavdelningen. Siemens anlitades som entreprenör. De villkor som styrde projektet kom från beslutsfattande politiker och handlade om den viktiga besparingsgarantin. Denna garanti var en förutsättning för att få ekonomiska medel att finansiera ett projekt av den här storleken. EPC som modell valdes för att möjliggöra dessa krav. Den data som legat till grund för analysen av de energieffektiviseringsåtgärder som utförts har funnits samlad i eRoom, Siemens plattform för EPC-projekt. Den information som varit mest essentiell har varit de projektutvecklingsrapporter som för varje objekt beskrivit läge, problembild, åtgärdsförslag samt de energikartläggningar som innehållit alla energiberäkningar för energiläget i respektive fastighet samt potentiellt energiläge efter utförande av föreslagna åtgärder. De åtgärder som ansågs relevanta för att på det mest tydliga vis beskriva resultatet av Umeå EPC-projekt beslutades få ligga till grund för att reda ut hur besparingsfördelningen såg ut. Resultatet av detta arbete visar att de åtgärder som levererade störst del av den totala besparingen i ren energi var åtgärder kopplade till fläktar samt övriga åtgärder där styråtgärder av motorvärmare, injusteringar och pumpar rymdes. Efter dessa poster var tilläggsisolering samt belysningsåtgärder stora. Vidare vad gäller den ekonomiska besparingen var det konverteringar av uppvärmning som var absolut störst, därefter fläktarbeten samt kategorin övriga poster. Den ekonomiska investeringen var svår att på ett rättvist sätt jämföra mot hur stora besparingarna varit per åtgärd. En jämförelse av besparing mot antal åtgärder inom varje kategori visar däremot att konvertering till fjärrvärme samt värmeåtervinning var de mest effektiva åtgärderna.
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Bouchouicha, Hamed. "Élaboration, caractérisation structurale et étude des propriétés de luminescence des verres et des vitrocéramiques alumino-silicatés de calcium dopés à l'europium." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1035/document.
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Ce travail de thèse porte sur l'étude des verres alumino-silicatés de calcium dopés à l'europium et le processus de leur cristallisation sous forme des vitrocéramiques dans le cadre de la recherche de nouveaux phosphores pour application LED à émission blanche. Nous avons étudié trois échantillons vitreux avec différentes teneurs en silice et avons élaboré des vitrocéramiques cristallisées. La caractérisation des verres et des vitrocéramiques a été réalisée par différentes techniques expérimentales : l'analyse thermique, la diffraction des rayons X et la spectroscopie de diffusion Raman. Les propriétés spectroscopiques de l'ion europium dans les verres et les vitrocéramiques synthétisés ont été étudiées. Le contrôle de la cristallisation des vitrocéramiques GC34 et GC50 par la diffraction des rayons X a permis d'identifier deux phases la mélilite et l'anorthite. Dans le cas de la vitrocéramique GC7, une seule phase alumino-calcique qui est la mayenite est cristallisée majoritairement. L'étude par la spectroscopie de diffusion Raman a permis d'une part, de suivre l'évolution de la cristallisation pendant les traitements thermiques en surface et en profondeur dans l'ensemble des vitrocéramiques. Nous avons montré que le processus de cristallisation a eu lieu en surface des échantillons et correspond typiquement à une nucléation hétérogène. D'autre part, une étude comparative avec des échantillons naturels analogues prise de la base de données RRUFF nous a permis de valider l'ensemble des résultats trouvés. Dans le cas des vitrocéramiques GC34 et GC50, les mesures des spectres d'émission et les durées de vie de l'ion Eu3+ montrent bien son incorporation dans les phases cristallines formées. L'ion Eu3+ tend à occuper seulement les sites Ca2+ (CN= 8) de la mélilite majoritaire dans la vitrocéramique GC34 alors, qu'il tend à s'incorporer dans les sites Ca2+ (CN= 6 et 7) et Ca2+ (CN=8) respectivement, des phases anorthite et mélilite formées dans la vitrocéramique GC50. Ces résultats ont été confirmés par les mesures d'affinement de raies. L'étude des spectres d'émission de l'ion Eu2+ a permis de mettre en évidence une modification de son environnement durant la cristallisation traduite par son incorporation dans les sites Ca2+ après réduction de l'ion Eu3+ pendant les recuits. Dans le cas de la vitrocéramique GC7, les spectres d'émissions et les mesures du déclin de luminescence de l'ion Eu3+ montrent bien que l'ion Eu3+ est incorporé dans la phase mayenite formée. En terme d'application, les mesures des coordonnées trichromatiques suggèrent que la dévitrification des verres semble être une technique efficace permettant d'obtenir de nouveaux matériaux luminophores (LED blanches) à émission intensifiée (cas des vitrocéramiques GC34 et G50) et accordable en modifiant leur composition et l'excitation<br>This work concerns the study of calcium aluminosilicate glass doped with europium and their process of crystallization as glass-ceramics as part of the search for new phosphors for white LED application. We studied three glass samples with different silica contents and have elaborated crystallized glass-ceramics. Characterization of glasses and glass-ceramics was performed by different experimental techniques: thermal analysis, X-ray diffraction and Raman spectroscopy. The spectroscopic properties of the europium ion in the glass and glass-ceramic synthesized were studied.Control of crystallization of GC34 and GC50 glass-ceramics by X-ray diffraction have been identified two phases, melilite and anorthite. In the case of the GC7 glass-ceramic, a single aluminum calcium phase, mayenite which crystallized predominantly. The study by Raman spectroscopy allowed to follow the evolution of the crystallization during heat treatment in the surface and of glass-ceramics. We have shown that the crystallization process initiate at the surface of the samples and corresponds typically to a heterogeneous nucleation. On the other hand, a comparison with similar natural samples allowed us to validate all the identifications.In the case of GC34 and GC50 glass-ceramics, emission spectra and lifetimes of Eu3+ ion clearly show its incorporation into the new-formed crystalline phases. The Eu3+ ion occupy the Ca2+ sites (CN = 8) in the major mélilite phase of the the GC34 glass-ceramic while, it incorporates the Ca2+ sites (CN = 6 and 7) and Ca2+ (CN = 8) of anorthite and mélilite phases formed in the GC50 glass-ceramic, respectively. These results were confirmed by Fluorescence Line Narrowing (FLN) measurements. The study of emission spectra of the Eu2+ ion allowed highlighting changes during crystallization associated with the reduction of the Eu3+ ions during annealing. In the case of the low silicate GC7 glass-ceramic, emission spectra and lifetimes measurements of the Eu3+ ion show that the Eu3+ ions are incorporated into the mayenite phase. In terms of application, the analyses of the trichromatic coordinates suggest that the glass devitrification appears to be an efficient technique to achieve new white LED phosphor materials with intensified (mainly for GC34 and G50 glass-ceramics) and tunable emission by varying composition and/or excitation
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Glans, Mikael. "Utveckling av styrsystem för EMC-kammare." Thesis, University of Gävle, Ämnesavdelningen för elektronik, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-5186.
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<p>This thesis aims to develop a control system for measuring electromagnetic compability (EMC). This has meant that a controller designed around an ATmega8 microcontroller has been manufactured and programmed. It has also meant the development of a comprehensive control software in the program MATLAB. The control system has been tested with satisfactory results and can now, monitor and control measurements of the EMC-type.</p><br><p>Detta examensarbete syftar till att utveckla ett styrsystem för mätning av elektromagnetisk kompabilitet (EMC). Detta har inneburit att ett styrkort uppbyggt kring en ATmega8 mikrokontroller har tillverkats och programmerats. Det har även inneburet utveckling av en övergripande kontrollmjukvara i programmet MATLAB. Styrsystemet har testats med tillfredsställande resultat och kan nu, övervaka och kontrollera mätningar av EMC-typ.</p>
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Cozza, Andrea. "Railways EMC : Assessment of Infrastructure Impact." Phd thesis, Université des Sciences et Technologie de Lille - Lille I, 2005. http://tel.archives-ouvertes.fr/tel-00533672.
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During the last three decades, electronic devices have conquered the railway domain, taking the place previously held by electromechanical devices, thanks to higher performances and lower costs. The price of this "revolution" is the fact that, in order to work properly and reliably, electronic systems must be fairly immune to the effect of external interferers, while, at the same time, they are not to electromagnetically pollute the environment they work in. These issues are dealt with by electromagnetic Compatibility (EMC) whereas several international EMC standardization committees work on the definition of tests and rules the manufacturers must comply with. In the European Union, the reference for EMC issues in the railway domain is set by the CENELEC standard EN 50121, which deals with several aspects of a generic railway system, from the power-supply infrastructure to rolling stocks and signalling circuits. The introduction of this standard in 1996 has had a strong impact on rolling stock manufacturers, who are now required to test their products for EMC compliancy. As opposed to the automotive domain, the testing of trains cannot be performed in standard facilities, such as anechoic chambers, so that they have to be tested on actual railway lines, typically on the customer's. Industrial experience has shown that results obtained in this way are usually site-dependent, something that is against the very idea of a standard. The aim of this work is to prove the importance of the infrastructure in radiated emission tests, showing that the test results are site-dependent, thus subject to misunderstandings and misinterpretations. To this end, the features of a generic railway system are briefly described, pointing out the great variability in actual configurations, together with the absence of standard solutions. Subsequently, the electromagnetic modelling of a railway system is introduced, dealing with both propagation and radiation phenomena; in particular, the main topic here addressed is the modelling of supply-lines, through a quasi-TEM approach. The finite conductivity of the soil is taken into account by means of a closed-form formulation, thus avoiding numerical methods, and overcoming the limitations of Carson's model. Moreover, special attention is paid to discontinuities that would increase the model complexity, proposing approximated descriptions supported by numerical results. Results obtained with this model are then validated through several measurement campaigns carried out on actual railway lines, proving the effectiveness of the approach here pursued. The model is then employed in order to prove that some criteria in the standard EN 50121, specifically introduced in order to avoid site-dependency, are not realistic, thus leaving this issue unresolved. To this end, numerical examples are considered, assessing the impact of the infrastructure by comparing results obtained with realistic site configurations and with the ideal one envisaged by the standard. These comparisons are at the base of a tentative procedure that would allow to avoid the misinterpretations that triggered this work. Unfortunately, this approach requires an accurate description of the test-site. Since this is hardly the case, an alternative experimental characterization of the site is proposed, based on magnetic field measurements. This approach, involving the solution of an inverse problem, is shown to be feasible through a numerical validation, though its practical utilization requires efficient optimization techniques.
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Gramlich, Ludwig. "Die ECU - Fremdwährung in der Bundesrepublik?" Universitätsbibliothek Chemnitz, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-200900521.
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Vortrag gehalten am 4. Juni 1988 an der Universität Würzburg anläßlich der Exkursion des Aufbaustudienganges "Europäische Integration" des Europa-Instituts der Universität des Saarlandes
Lange vor Einführung des Euro ließ die Bundesbank die private Verwendung der Europäischen Währungseinheit (ECU) in Deutschland zu. Der Beitrag zeichnet die Schaffung und Bedeutung des ECU seit 1979 nach, einschließlich der Unterscheidung von offizieller und privater Verwendung, und benennt einige offene Rechtsfragen im Hinblick auf das Währungsrecht der DM.
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Cunningham, S. "Fisheries management within the enlarged EEC." Thesis, University of Portsmouth, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372077.
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Song, Gao. "Matrix manipulation to study ECC behaviour." Thesis, Stellenbosch : University of Stellenbosch, 2005. http://hdl.handle.net/10019.1/4647.
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Thesis (MScEng (Civil Engineering))--University of Stellenbosch, 2005.<br>192 leaves on CD format, preliminary i-xii pages and numbered pages 1-135. Includes bibliography, list of figures and tables.<br>ENGLISH ABSTRACT: As a fibre reinforced material, engineered cementitious composite (ECC) has tough, strain-hardening behaviour in tension despite containing low volumes of fibres. This property can be brought about by developments in fibre, matrix and interfacial properties. Poly Vinyl Alcohol (PVA) fibre has been developed in recent years for ECC, due to its high tensile strength and elasticity modulus. However, the strong interfacial bond between fibre surface and matrix is a challenge for its application. This study focuses on the tailoring of matrix and fibre/matrix interfacial properties by cement replacement with fly ash (FA) and Ground Granulated Corex Slagment (GGCS). In this study the direct tensile test, three point bending test, micro-scale analysis, such as X-Ray Fluorescence Spectrometry analysis (XRF), Scanning Electron Microscope (SEM), are employed to investigate the influence of cement replacement, aging, Water/Binder (W/B) ratio, workability on ECC behaviour. This study has successfully achieved the aim that cement replacement by FA and GGCS helps to improve the fibre/matrix interfacial properties and therefore enhances the ECC tensile behaviour. Specifically, a high volume FA-ECC has stable high tensile strain capacity at the age of 21 days. This enables a constant matrix design for the investigation of other matrix influences. The Slag-ECC has a higher tensile strength but lower tensile strain capacity. The combination of FA and GGCS, moderate tensile strength and strain capacity is achieved Both tensile tests and Micro-scale analyses infer that the high volume FA-ECC has an adhesive type fibre/matrix interfacial interaction, as opposed to the cohesive type of normal PVA fibre-ECC. The different tensile behaviour trend of steel fibre-ECC and PVA fibre-ECC with the FA content is presented and discussed in this research. The investigations of aging influence indicate that the high volume FA-ECC has a beneficial effect on the properties of the composite at an early stage. However, at a high age, it has some difficulty to undergo multiple cracking and then leads to the reduction of tensile strain capacity. The modified mix design is made with the combination of FA and GGCS, which successfully increases the interfacial bond and, thereby, improves the shear transfer to reach the matrix crack strength. Therefore, an improved high age tensile behaviour is achieved. The W/B and fresh state workability influence investigations show that the W/B can hardly affect the tensile strain at early age. However, the workability influences on composite tensile strain significantly, because of the influence on fibre dispersion. Other investigations with regard to the hybrid fibre influences, the comparison of bending behaviours between extruded plate and cast plate, the relation between bending MOR and tensile stress, and the relation between compression strength and tensile strength contribute to understand ECC behaviour.<br>AFRIKAANSE OPSOMMING: As ‘n veselversterkte materiaal, het ontwerpte sementbasis saamgestelde materiale, taai vervormingsverhardingseienskappe in trek, ten spyte van lae veselinhoud. Hierdie eienskap word bewerkstellig, deur ontwikkelings in vesel, matriks en tussenveselbindingseienskappe. Poli-Viniel Alkohol (PVA) vesels is ontwikkel vir ECC, as gevolg van die hoë trekkrag en hoë modulus van hierdie veseltipe. Die sterk binding tussen die PVA-veseloppervlak en die matriks is egter ‘n uitdaging vir sy toepassing. Hierdie studie fokus op die skep van gunstige matriks en vesel/matriks tussenvesel-bindingseienskappe deur sement te vervang met vlieg-as (FA) en slagment (GGCS).In hierdie navorsing is direkte trek-toetse, drie-punt-buigtoetse, mikro-skaal analise (soos die X-straal ‘Fluorescence Spectrometry’ analise (XRF) en Skanderende Elektron Mikroskoop (SEM))toegepas. Hierdie metodes is gebruik om die invloed van sementvervanging,veroudering, water/binder (W/B)-verhouding en werkbaarheid op die meganiese gedrag van ECC te ondersoek.Die resultate van hierdie navorsing toon dat sementvervanging deur FA en GGCS help om die vesel/matriks tussenveselbindingseienskappe te verbeter. Dus is die ECC-trekgedrag ook verbeter. Veral ‘n hoë volume FA-ECC het stabiele hoë trekvervormingskapasiteit op ‘n ouderdom van 21 dae. Dit bewerkstellig ‘n konstante matriksontwerp vir die navorsing van ander matriks invloede. Die Slag-ECC het ‘n hoër treksterkte, maar laer trekvervormingskapasiteit. Deur die kombinasie van FA en GGCS word hoë treksterkte, sowel as gematigde vervormbaarheid in trek verkry. Beide trektoetse en mikro-skaal analise dui aan dat die hoë volume FA-ECC ‘n adhesie-tipe vesel/matriks tussenvesel-bindingsinteraksie het, teenoor die ‘kohesie-tipe van normale PVA vesel-ECC. Die verskille in trekgedrag van staalvesel-ECC en PVA vesel-ECC ten opsigte van die FA-inhoud is ondersoek en word bespreek in die navorsing. Die navorsing toon verder dat die hoë volume FA-ECC goeie meganiese eienskappe het op ‘n vroeë ouderdom. Op hoër ouderdom word minder krake gevorm, wat ‘n verlaging in die trekvervormingskapasiteit tot gevolg het. Met die kombinasie van FA en GGCS, word die vesel-matriksverband verhoog, waardeur ‘n verbetering in die skuifoordrag tussen vesel en matriks plaasvind. Verbeterde hoë omeganiese gedrag word daardeur tot stand gebring. Navorsing ten opsigte van die invoed van die W/B en werkbaarheid dui daarop dat die W/B slegs geringe invloed het op die trekvormbaarheid, terwyl die werkbaarheid ‘n dominerende rol speel in hierdie verband.Verdere studies sluit in die invloed van verskillende vesels, die vergelyking van die buigingsgedrag van geëkstueerde plate en gegote plate, die verhouding tussen buigsterkte en treksterkte, en die verhouding tussen druksterkte en treksterkte dra by tot beter begrip van die gedrag van ECC.
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Venter, Francois A. "An EMC framework for South Africa." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/53258.
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Thesis (MScEng)--University of Stellenbosch, 2003.<br>ENGLISH ABSTRACT: This thesis pursues the establishment of a new Electromagnetic Compatibility (EMC)
framework for South Africa. The aim of this framework is to ensure that the user is
protected from sub-standard products as well as to ensure that products such as
medical devices operate safely within the electromagnetic environment.
The thesis presents a basic introduction into EMC and then overviews current worldwide
legislation. After this information is studied a new framework is proposed for South
Africa. This framework covers all areas of industry and the standards with which one has
to comply as well as the procedure for demonstrating the compliance of the product.
In order to establish the basis whereby smaller manufacturers can show compliance by
means of in-house testing, a method for establishing measurement accuracy is also
presented. In conclusion some standard measurements and an overview of some
alternative measurement techniques are presented.<br>AFRIKAANSE OPSOMMING: Hierdie tesis ondersoek en stel 'n nuwe Elektromagnetiese Versoenbaarheids (EMV)
raamwerk voor vir Suid Africa. Die doel van die raamwerk is om 'n eenvormige stelsel
daar te stel waarteen produkte getoets kan word om die publiek teen onder standaard
produkte te beskerm. In sekere gevalle help die raamwerk ook om te verseker dat
produkte soos mediese toerusting veilig werk in die Elektromagnetiese omgewing.
Die tesis lê 'n basiese inleiding oor EMV voor en gee 'n opsomming van huidige
wêreldwye wetgewing as inleiding tot 'n raamwerk vir Suid Afrika. Nadat die inligting
bestudeer is, word 'n nuwe raamwerk vir Suid Afrika voorgestel. Die raamwerk dek die
hele elektroniese industrie, spesifiseer die toepaslike standaarde en voorsien die
metodes hoe voldoenning aan die vereistes bewys moet word.
Die tesis verskaf ook riglyne hoe kleiner vervaardigers kan bewys dat hulle voldoen aan
die vereistes, deur in-huis toetsing. Tesame met 'n oorsig oor basiese meet tegnieke en
alternatiewe tegnieke word 'n metode daar gestel vir sulke vervaardigers om hul metings
se akuraatheid te bewys.
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Shukla, Siddharth. "Embedded Security for Vehicles : ECU Hacking." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-300740.
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A modern automotive vehicle is a complex technical system, containing many electronic, mechanical, and software parts. Typically, a vehicle contain 70 or more ECU's (Electronic Control Units) on an average controlling a large number of distributed functions, of which many are safety-critical like ABS control, Transmission Control, Engine Control and Body Control etc. So if there are possible attacks on the ECU then this could be even more dangerous than the web attacks as these involve the risk of life. The project involves vulnerability analysis of ECU with Tricore microcontroller to understand any security weaknesses and attacks are created to exploit those weaknesses. A service with potential vulnerabilities is implemented on the ECU and attacks to exploit such vulnerabilities are demonstrated. The Tricore architecture is analyzed to find what types of attacks are possible, what the desired targets are and how attacks could be performed over the CAN network. The result of the project is a working example of an exploitable application running on an ECU and microcontroller.
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Bosco, Giácomo Bizinoto Ferreira 1987. "Luminescência do Eu3+ em a-SiNx:H." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/278134.
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Orientador: Leandro Russovski Tessler<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin<br>Made available in DSpace on 2018-08-23T00:49:05Z (GMT). No. of bitstreams: 1
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Previous issue date: 2013<br>Resumo: Neste trabalho estudamos a fotoluminescência (PL) do Eu3+ em filmes finos de subnitretos de silício amorfo hidrogenado (a-SiNx:H) dopados com európio. No total, 85 amostras do material foram preparadas por RF-sputtering reativo variando o conteúdo de nitrogênio e európio. A caracterização composicional foi feita por RBS (Rutherfod Backscattering Spectroscopy). Coeficientes de absorção, índices de refração e espessuras das amostras foram determinados por espectroscopia de transmitância ótica UV-VIS. A PL foi medida a temperatura ambiente e a 10K em função da temperatura de recozimento entre 250 e 1100°C sob atmosfera redutora de nitrogênio ou oxidante de oxigênio. Para as amostras recozidas em atmosfera de N2, não foi observada nenhuma PL proveniente dos íons Eu3+. Há, no entanto indicações da PL característica de íons Eu2+. Após quase um ano de tentativas frustradas de obter PL dos íons Eu3+ foram determinados os parâmetros das amostras que otimizam o processo: concentração de nitrogênio x em torno de 1,17, temperatura de recozimento de 1100oC em atmosfera de oxigênio e concentração de európio y = [Eu]/[Si] = 8,9 at%.. A emissão do Eu3+ em a-SiNx:H foi analisada pela teoria de campo cristalino usando um pacote de programas que otimiza os parâmetros de campo cristalino da camada f. Para isso, analisamos também o espectro do Eu2O3 em pó, usado como referencia. Assim confirmamos que os íons ativos de Eu3+ ocupam sítios de simetria pontual C2. A analise dos dados para a-SiNx:H sugere que nesse material os íons Eu3+ ocupam sítios com a mesma simetria encontrada em Eu2O3 mas muito mais suscetíveis aos efeitos de desordem. Considerando essa simetria e o tratamento térmico necessário, e razoável supor a formação de clusters de oxido de európio de dimensões nanométricas em torno dos íons Eu3+<br>Abstract: In this work we studied the photoluminescence (PL) of Eu3+ in europium doped hydrogenated amorphous silicon subnitrides thin films (a-SiNx:H). In total, 85 samples of the material were prepared by reactive RF-sputtering varying the nitrogen and europium contents. Compositional characterization was obtained by RBS (Rutherford Backscattering Spectroscopy). Absorption coefficients, refraction indexes ans sample thicknesses were determined by UV-VIS optical transmittance spectroscopy. The PL was measured at room temperature and at 10K as a function of the sample annealing temperature between 250 and 1100°C under a reductive nitrogen atmosphere or an oxidant oxygen atmosphere. For the N2 annealed samples, we did not observe any PL from Eu3+ íons. There are, however, indications of Eu2+ characteristic emission. After almost a year of frustrated attempts to obtain PL from Eu3+ ions the parameters which optimize the process were determined: nitrogen content x around 1,17, annealing temperature of 1100oC under oxygen atmosphere and europium content y = [Eu]/[Si] = 8,9 at%. The Eu3+ emission in a-SiN1,17:H was analyzed using crystal field theory and a program suite to optimize f-shell crystal field parameters. We also analyzed the PL spectrum of powder Eu2O3 to use as a reference. The data analysis for a-SiNx:H suggests that in this material the Eu3+ active ions occupy sites with the same C2 point symmetry found in Eu2O3 but much distorted due to disorder. Considering this symmetry and the sample treatment necessary to obtain the PL, it is reasonable suppose the formation of europium oxide nanometer scale clusters around the Eu3+ ions<br>Mestrado<br>Física<br>Mestre em Física
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Franco, Patricia Pereira. "Etc. e reticências: possibilidades de sentidos." Universidade Catolica de Pelotas, 2014. http://tede.ucpel.edu.br:8080/jspui/handle/tede/385.
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Previous issue date: 2014-12-18<br>Esta investigación hace un estudio discursivo de la abreviatura etc. en comparación con el signo de puntuación los puntos suspensivos, por el bies de la lectura, de la interpretación y de la escritura. Con base en la línea teórica del Análisis del Discurso francesa, desarrollamos, inicialmente, una reflexión acerca de las nociones más relevantes para este trabajo. Luego, buscamos las concepciones lingüísticas de los objetos de análisis para, a partir de eso, pensar en un enfoque discursivo para los mismos. Hecha esta investigación teórica, aplicamos un texto verbo-visual que intentaba rellenar de sentidos el etc. y los puntos suspensivos. Por lo tanto, con base en el análisis de los textos producidos por los estudiantes que participan de esta investigación, realizamos los análisis en los cuales fue posible considerar que la mayoría de ellos leyó e interpretó el etc. y los puntos suspensivos de manera muy similar, lo que nos permitió percibir que, en el funcionamiento discursivo, el etc. y los puntos suspensivos producen sentidos que se no son iguales, son muy próximos, o sea, los gestos de interpretación, en los dos casos, son muy parecidos<br>A presente pesquisa efetua um estudo discursivo da abreviatura etc. comparada com o sinal de pontuação reticências, pelo viés da leitura, da interpretação e da escritura. Com base na linha teórica da Análise de Discurso de linha francesa, desenvolvemos, primeiramente, uma reflexão acerca das noções mais relevantes para este trabalho. Em seguida, buscamos as concepções linguísticas dos objetos de análise para, a partir disso, pensar em um enfoque discursivo para os mesmos. Feito esse levantamento teórico, partimos para a aplicação de um texto verbo-visual que visava ao preenchimento de sentidos para o etc. e para as reticências. Logo, com base nas análises dos textos produzidos pelos alunos participantes desta pesquisa, efetuamos as análises nas quais foi possível considerar que a maioria deles leu e interpretou o etc. e as reticências de maneira muito semelhante, permitindo-nos escrever que, no funcionamento do discurso, o etc. e as reticências produzem sentidos se não igual, muito próximos, ou seja, os gestos de interpretação, nos dois casos, são muito parecidos
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Khatwani, Chanchal. "Security Analysis of ECC Based Protocols." UNF Digital Commons, 2017. http://digitalcommons.unf.edu/etd/734.
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Elliptic curve cryptography (ECC) is extensively used in various multifactor authentication protocols. In this work, various recent ECC based authentication and key exchange protocols are subjected to threat modeling and static analysis to detect vulnerabilities, and to enhance them to be more secure against threats. This work demonstrates how currently used ECC based protocols are vulnerable to attacks. If protocols are vulnerable, damages could include critical data loss and elevated privacy concerns. The protocols considered in thiswork differ in their usage of security factors (e.g. passwords, pins, and biometrics), encryption and timestamps. The threatmodel considers various kinds of attacks including denial of service, man in the middle, weak authentication and SQL injection. Countermeasures to reduce or prevent such attacks are suggested. Beyond cryptanalysis of current schemes and proposal of new schemes, the proposed adversary model and criteria set forth provide a benchmark for the systematic evaluation of future two-factor authentication proposals.
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Kim, Jun. "Eum-yang : for new piano trio /." May be available electronically:, 1999. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.
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D.M.A. final project--Department of Music, Stanford University, 1999.<br>For sampled and computer modified violin sounds, violoncello with microphone (or electronic violoncello), and piano with microphone. Includes abstract and notes on instruments and equipment, compositional and technical processes, and CLM (Common Lisp Music).
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Cozza, Andrea Canavero Flavio Démoulin Bernard. "Railways EMC assessment of infrastructure impact /." Villeneuve d'Ascq : Université des sciences et technologies de Lille, 2007. https://iris.univ-lille1.fr/dspace/handle/1908/272.
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Reproduction de : Thèse de doctorat : Électronique : Lille 1 : 2005. Tesi di dottorato : Ingeneria Ellectronica e delle Comunicazioni : Politecnico di Torino : 2005.<br>Thèse en cotutelle. N° d'ordre (Lille 1) : 3635. Texte en anglais. Résumé en français et en anglais. Titre provenant de la page de titre du document numérisé. Bibliogr. p. 145-149.
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Martincová, Kateřina. "Trychtýřová hřebenová anténa pro měření EMC." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-377112.
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The thesis deals with the design and realization of a horn antenna for electromagnetic compatibility measurement. First it focuses on general theory of antennas, than it focuses more on horn antennas and their design. Second part deals with description of antenna realization and comparison of simulated results.
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Fernandes, Sarah. "A literatura brasileira traduzida nos EUA." reponame:Repositório Institucional da UFSC, 2014. https://repositorio.ufsc.br/xmlui/handle/123456789/129612.
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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão, Programa de Pós-Graduação em Estudos da Tradução, Florianópolis, 2014.<br>Made available in DSpace on 2015-02-05T21:17:56Z (GMT). No. of bitstreams: 1
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Previous issue date: 2014<br>O presente trabalho analisa as traduções de obras de literatura brasileira nos Estados Unidos do ano 2000 até 2013. Interessa-nos saber o que está sendo traduzido e como são apresentadas essas traduções para o público. Para tanto, partimos da ideia de Gideon Toury (2012), de que traduções são fatos da cultura de chegada e baseamos nossa análise na teoria dos Estudos Descritivos da Tradução, do qual Toury é precursor. Fazendo uso do conceito de normas de Toury (2012), buscamos entender o que guia a escolha das obras a serem traduzidas no sistema norte-americano. Analisamos as capas dessas obras sob a perspectiva de Gérard Genette (2009), apresentada na obra Paratextos Editorias, para descobrir como essas traduções estão sendo apresentadas para o público.<br><br>Abstract : This research analyzes the translation of brazilian literature in the United States from the year 2000 until the year 2013. We are interested in knowing what is being translated and how these translations are presented to the public . The starting point was Gideon Toury?s (2012) idea of translations as facts of the culture who recieves them. We base our analysis on the theory of Descriptive Translation Studies, of which Toury is the precursor. Basen upon the concept of norms, as defined by Toury (2012) , we seek to understand what drives the choice of works to be translated in the North-American system. We analyze the covers of these works from the perspective of Gérard Genette (2009) , presented in the work Paratext : thresholds of interpretation , to discover how these translations are being presented to the public .
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Vejtasa, Leoš. "EMC zkušební laboratoř pro jističe NN." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220947.
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Nowadays there are electronic systems almost in every new device. They are emitting and receiving electromagnetic interferences. The safety levels for circuit breakers are also increasing. Because of these issues the circuit breakers must work properly also in areas filled by electromagnetic interference. This thesis describes the issues of electromagnetic susceptibility of the circuit breakers.
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Šeděnka, Vladimír. "Numerická řešení problematiky EMC malých letadel." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-233594.
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Disertace popisuje současné problémy v certifikaci malých letadel, které by se měly v budoucnu řešit numerickým modelováním. Tento postup má zefektivnit návrh a zlevnit certifikaci letadel. Práce je úzce spjata s projektem HIRF-SE, který se problematikou certifikace letadel numerickými metodami zabývá. Podstatná část práce je věnována popisu dvou modulů pro platformu HIRF-SE: řešič BUTFE založený na metodě konečných prvků v časové oblasti a budicí nástroj BUTFE_EXC. Práce popisuje řešení pohlcujících okrajových podmínek, modelování disperzních a anizotropních materiálů a aproximaci tenkých drátů. Speciální pozornost je věnována řešení aproximace tenkých drátů s ostrými ohyby, jejíž současná formulace způsobuje překryvy mezi jednotlivými segmenty drátu.
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AKRIM, ABDELLATIF. "Proprietes structurales et optiques des pyrophosphates ayp207 : tb3+, eu3+ (a = rb, cs). mecanisme de transfert tb3+ - eu3+." Clermont-Ferrand 2, 1994. http://www.theses.fr/1994CLF21641.
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Le travail effectue au cours de la these a porte sur l'etude des proprietes optiques et structurales des pyrophosphates ayp207 (a = rb, cs) dopes en ions eu3+ et tb3+. Dans la premiere partie de ce travail, nous avons realise d'une part la synthese des materiaux par voie solide, et d'autre part l'affinement de leur structure par diffraction des rayons x sur poudre. L'affinement structural a ete base sur la methode de rietveld. Dans les deux materiaux rbyp207 et csyp207 les polyedres de coordination de l'alcalin et du phosphore presentent des distorsions dues a la taille de l'ion trivalent. La deuxieme partie du travail a ete consacree a l'etude des proprietes optiques des ions tb3+ et eu3+ dopant individuellement chacun des deux materiaux. Pour les materiaux dopes au terbium, nous avons mis en evidence une faible extinction par concentration de la fluorescence 5d4 - 7f5 et une diffusion rapide assistee de phonons se produisant pour les fortes concentrations en ions terbium. L'etude des proprietes optiques des materiaux dopes en ions eu3+ nous a permis de noter l'existence de deux sites optiques pour l'ion trivalent, lorsque la synthese impliquait le carbonate d'yttrium. Le premier est le site intrinseque prevu par l'etude structurale. Le deuxieme est un site supplementaire du a la presence d'ions co32- residuels dans le reseau anionique. Lorsque la synthese des materiaux est realisee en utilisant l'oxyde d'yttrium comme produit de depart seul le site intrinseque est observe. La derniere partie du travail a porte sur l'etude du transfert d'energie tb3+ - eu3+. Il a ete mis en evidence grace a l'analyse des spectres d'excitation de l'ion eu3+ et des declins de fluorescence de l'ion tb3+ et de l'ion eu3+ dans les materiaux codopes en ces deux ions. Le mecanisme de transfert met en jeu les niveaux 5d4, 7f4 de l'ion tb3+ et 5do, 7fo,1 de l'ion eu3+ a temperature ambiante. Par contre a 77 k, le mecanisme fait intervenir les niveaux 5d4, 7f6 de l'ion tb3+ et 5d1, 7fo de l'ion eu3+
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Gomes, Manassés Almeida. "Síntese via sol gel proteico e caracterização estrutural e óptica do CaAl2O4:Eu3+, CaAl2O4:Ce3+, CaAl2O4:Eu3+;Dy3+." Universidade Federal de Sergipe, 2013. https://ri.ufs.br/handle/riufs/5367.
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Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq<br>In this work were studied the optical and structural properties of the calcium aluminate
in the stoichiometry 1:2:4 (CaAl2O4) doped with rare earths (RE = Ce, Eu, EuDy). The
material was produced via the Sol-Gel Proteic Method that is so known because of its
capacity of producing nanosized particles. The structural characterization of the samples was
performed by Differential Thermic and Thermogravimetric Analysis (DTA/TG), Scattering
electron microscopy (SEM), X-ray diffraction (XRD), where the last one reveals the
formation of the single phase of CaAl2O4 calcined at 1200ºC for 2 hours. The study of the
optical properties this material has started from 4f-4f and 5d-4f transitions identification,
related to the rare earths, through the Photoluminescence (PL) and Radioluminescence (RL)
techniques. The Absorption of ionizing radiation, the conversion of radiation into visible
light, important factors in the properties that define the application of a material, it was
studied by X-Ray Excited Optical Luminescence (XEOL) and Optical Absorption (AO)
techniques. The results obtained with these techniques together X-ray Absorption
Spectroscopy (XAS) analysis possible a broad understanding of the properties of material.<br>Neste trabalho foram estudadas as propriedades ópticas e estruturais do Aluminato de
Cálcio na estequiometria 1:2:4 (CaAl2O4) dopado com terras raras (TR = Ce, Eu, EuDy). O
material foi produzido utilizando o método Sol Gel Proteico conhecido por produzir partículas
de tamanho nanométrico. A caracterização estrutural das amostras foi realizada através das
técnicas de Analise Térmica Diferencial juntamente com a Termogravimétria (DTA/TG),
Microscopia Eletrônica de Varredura (MEV) e Difração de Raios X (DRX), sendo que este
último possibilitou a identificação da formação da fase única para o CaAl2O4 à uma
temperatura de calcinação de 1200ºC por 2 horas. O estudo das propriedades ópticas do
material iniciou a partir da identificação das transições 4f-4f e 5d-4f, referentes aos íons terras
raras, através da técnica de Fotoluminescência (PL) e Radioluminescência (RL). A absorção
de radiação ionizante e conversão da radiação em luz visível, fatores importantes nas
propriedades que definem sua aplicação, foram estudadas pelas técnicas de Emissão
Luminescente Estimulada por Raios X (XEOL) e Absorção Óptica (AO). Os resultados
obtidos com estas técnicas juntamente com análises de Espectroscopia de Absorção Raios X
(XAS) possibilitaram um entendimento amplo das propriedades do material.
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Heldwein, Marcelo Lobo. "EMC filtering of three-phase PWM converters /." Zürich : ETH, 2008. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17554.
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Sinjukow, Peter. "A model study for Eu-rich EuO." Doctoral thesis, [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=97419137X.
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Sugulle, Abdirashiid. "EMC problematik och el-kvalitet i elkraftnät." Thesis, Växjö University, School of Mathematics and Systems Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-519.
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<p>The dissertation deals with an account of actual problem, which can arise within EMC and power quality. The cause of power interruption and what can be done to minimise the power interruption is discussed. It also includes a definition of planning levels and which factors one needs to have control over to carry out a possible planning strategy and how the local distributions net could be more secure. The electrical net could be secure but no system can be free from interruption.</p><p>The dissertation examines two distribution transformers: GLA40T1 (Glansås) and T399 in Tranås Energy which don’t have regulators. It applies a planning level for voltage variation in the voltage of second level with +/-5 % of nominal voltage. The purpose is to reduce the consequence of high voltage variation and to keep the costs at an acceptable level. The research also makes even clear the similarity between results of the theoretical calculations and results of the practical measurements taken from Tranås Energy. The examination shows that the supposed planning level is fulfilled.</p><br><p>Examensarbetet behandlar de faktiska problem som kan uppstå inom EMC (Electro Magnetic Compatibility) och el-kvalité, orsaken till elavbrott diskuteras och vad som kan göras för att minimera avbrotten. Arbetet innehåller också en definition av planeringsnivåer och vilka faktorer man behöver ha kontroll över för att genomföra ett eventuellt planeringsutrymme, och hur lokala distributionsnät kan bli säkrare. Näten kan bli säkrare men inget system kan bli avbrottsfritt.</p><p>I examensarbetet undersöks två fördelningstransformatorer: GLA40T1(Glansås) och T399 i Tranås energi. Båda transformatorerna saknar regulator. Man tillämpar en planeringsnivå för spänningsvariationen på spänningen på sekundära sidan som är +/-5 % av nominell spänning. Avsikten är att minska konsekvenserna av höga spänningsvariationer och att hålla kostnaden på en acceptabel nivå. Undersökningen omfattar också en jämförelse mellan de teoretiska beräkningsresultaten och de verkliga mätningarna som är hämtade från Tranås energi. Undersökningen visar att antagna planeringsnivån är uppfyllda</p>
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Asplund, Anders. "Framtagning av ECU test rapport och testmetod." Thesis, KTH, Tillämpad maskinteknik (KTH Södertälje), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-102943.
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