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Dissertations / Theses on the topic 'Code Blue'
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Yamaguti, Kleber Eiti. "Propriedades reológicas das Blue Plases." Universidade Estadual de Londrina. Centro de Ciências Exatas. Programa de Pós-Graduação em Física, 2006. http://www.bibliotecadigital.uel.br/document/?code=vtls000113235.
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Nesta dissertação estudamos o fenômeno de transição de fase colestéricoisotrópico em dois cristais líquidos que apresentam Blue Phases: o miristato de colesterila e o nonanoato de colesterila. A presença das Blue Phases levam a transição, tipicamente de primeira ordem, para uma classe de transições chamadas transições fracamente de primeira ordem, onde os dados experimentais apresentam propriedades de transições de fase contínuas.In this dissertation we studied the cholesteric-isotropic phase transition phenomena in two liquid crystals that presents Blue Phases: myristate of cholesteyl and the nonanoate of cholesteryl. The presence of Blue Phases takes the transistion, typically first-order, for a class called weakly first-order phase transitions, where the experimental data present properties of continuous phase transitions.
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Corey, Pamela Joy. "The Effectiveness of Adult and Pediatric Code Blue Simulation-Based Team Trainings." ScholarWorks, 2016. https://scholarworks.waldenu.edu/dissertations/2804.
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The adult and pediatric healthcare providers at a New England medical center attended simulation training for responding to cardiac arrests that incorporated the current American Heart Association (AHA) evidence-based standards. The purpose of this concurrent mixed method program evaluation was to compare the adult code blue and pediatric team training programs to the AHA's standards and identify if the staff learned the necessary skills to care for patients in cardiac arrest. The conceptual models used for the study were Crisis Resource Management and the transfer of learning model. The study sample was 660 adult and 269 pediatric healthcare providers who participated in both programs between 2012 and 2015. The research questions explored how the adult and pediatric programs compared, if they provided staff with necessary skills to care for cardiac arrests using current standards, and the staff perceptions of program effectiveness and barriers encountered. The data were collected using evaluation and observation forms and needs-assessment surveys. A chi square analysis identified differences between the programs on staff preparedness and transfer of knowledge into practice. The coding of the qualitative data identified themes from the participants' perceptions on program design. Results prompted a program and curriculum redesign to include multiple opportunities to allow staff to learn and practice skills for low volume high acuity situations. The study promotes social change by giving healthcare providers opportunities to translate evidence-based training into clinical practice. The ability to function effectively as a team in a crisis improves patient outcome and potentially reduces mortality and morbidity within the institution and community. Simulation education also improves staff confidence in performance of low volume and high acuity situations.
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Morrow, Jadi Leigh. "Creating the blue code: Identity, gender and class in a police training environment." Connect to online resource, 2008. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3303888.
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Bovicelli, Alessandro. "Progetto e realizzazione di un laboratorio per attività di Penetration Testing, Red Teaming e Blue teaming in ambiente Active Directory." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/22403/.
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Il progetto di tirocinio e tesi è stato pianificato con l’obiettivo di creare un laboratorio di macchine virtuali in cui configurare un dominio Active Directory, che sarebbe servito poi all’azienda per attività di penetration testing su di un ambiente controllato.
Un laboratorio sul quale testare le vulnerabilità è fondamentale, poiché effettuare attività di penetration testing e vulnerability assessment sull’ambiente di produzione potrebbe comprometterne il corretto funzionamento. Utilizzando un laboratorio non in produzione è possibile anche studiare e approfondire le tematiche legate ad Active Directory al fine di creare nuovi scenari o percorso d’attacco.
Grazie alla tecnica di Infrastructure as Code (IaC), è stato possibile definire la struttura del laboratorio sotto forma di codice in appositi file di configurazione.
Una volta che il laboratorio è stato creato con successo, lo stesso è stato configurato per assumere le fattezze di un ambiente Active Directory di una compagnia reale.
È stato quindi eseguito un penetration test con lo scopo di individuare le vulnerabilità e sfruttarle per esfiltrare informazioni sensibili del sistema. Contemporaneamente, sono stati annotati i log che vengono prodotti durante l’esecuzione di questi attacchi da parte di un intruso. Questi log sono poi stati analizzati per scoprire se è possibile rilevare un attacco solamente controllando gli eventi che questo scatena sul sistema.
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Mansas, Clémentine. "Synthèse de nanoparticules coeur-coquille pour capter le césium radioactif." Thesis, Montpellier, 2017. http://www.theses.fr/2017MONTT207/document.
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Le travail décrit dans cette thèse est basé sur la synthèse et l’étude de nanoparticules cœur-coquille capables de capter du césium radioactif. Ces travaux s’inscrivent dans l’amélioration d’un procédé de sorption du césium déjà existant et utilisant des monolithes de silice poreux fonctionnalisés avec des nanoparticules (NPs) d’Analogue du bleu de Prusse (ABP) ou plus précisément K2CuFe(CN)6 (CuABP). Les nanoparticules issues de cette famille sont très connues pour leur capacité de sorption et leur sélectivité vis-à-vis du césium. Ainsi afin d’éviter l’agrégation des NPs au sein du monolithe et d’augmenter les capacités de sorption, il a été décidé de synthétiser des nanoparticules cœur-coquille avec un cœur d’ABP protégé par une coquille de silice poreuse. La voie de synthèse choisie pour réaliser ce type de nanoparticules est celle qui utilise une microémulsion inverse afin de contrôler la forme et la taille des nanoparticules finales. Ce choix a permis de réaliser la synthèse in situ des NPs d’ABP avec une excellente stabilité des nanoparticules dans les gouttes d’eau dans certaines conditions opératoires. Les microémulsions ont été caractérisées grâce aux SAXS (Small Angle X-ray Scattering). Grâce à des modèles de simulation, des tailles de gouttes d’eau allant de 0.5 à 3 nm de rayon ont été déterminées selon la quantité d’eau introduite. Le paramètre w correspondant au rapport molaire entre l’eau et le tensioactif (w=[H2O]/[tensioactif]) es un bon moyen d’exprimer la quantité d’eau présente dans le système. La croissance de la coquille de silice est réalisée grâce au procédé sol-gel en milieu basique en présence de TEOS. La morphologie des nanoparticules cœur-coquille a ensuite été étudiée grâce à la microscopie électronique (HRTEM/STEM/HAADF) et l’analyse chimique et structurale a été réalisée grâce à la spectroscopie infrarouge (FTIR-ATR) et à la DRX. Ainsi, pour la première fois, des nanoparticules cœur-coquille telles que définies ici ont été synthétisées. Des tests de sorption du césium par ces nanoparticules cœur-coquille ont également été mis en œuvre avec des résultats encourageants (Qmax(NPs cœur-coquille)=125 mg/g). De plus ces nanoparticules ne sont pas seulement utiles pour la décontamination d’effluents aqueux, elles ouvrent aussi de nouvelles portes pour l’auto-irradiation et l’auto-confinement de radioélémentsThe research work described below is based on the synthesis and the study of core-shell nanoparticles able to entrap radioactive cesium. A sorption process of radionuclides on porous silica monoliths has already been described to capture radioactive cesium and to anchor it on a solid phase. Those materials were therefore functionalized with Prussian Blue Analogous (PBA) nanoparticles or more precisely K2CuFe(CN)6 (CuPBA) that are well known to be highly selective towards Cs. However, those materials did not allow optimal Cs sorption because of strong aggregation of PBA nanoparticles within the monoliths. Thereby, the solution developed is the use of core-shell nanoparticles in order to avoid the PBA aggregation. The core of these nanoparticles is made with PBA and protected by a porous silica shell.A reverse microemulsion is chosen as main synthetic route to synthesize and control the size and shape of these nanoparticles. That synthetic route allows in-situ synthesis of CuPBA nanoparticles in the microemulsion with an excellent stability of the particles in the water droplets. Microemulsions, characterized with SAXS, show droplets radius varying from 0.5 to 3 nm with regard to the water content defined by w parameter (w=[H2O]/[surfactant]). The growth of the silica shell is then achieved after the synthesis of CuPBA, using a classical basic conditions sol-gel process. The morphology of the core-shell nanoparticles is controlled with HRTEM/STEM-HAADF and the structural and chemical analysis are followed by XRD and FTIR-ATR. Finally, this study enables, for the first time, the synthesis of these core-shell nanoparticles. Then, recent sorption experiments highlighted that these core-shell nanoparticles can be used to entrap cesium with interesting capacity ((Qmax(core-shell NPs)=125 mg/g)). Moreover, these nanoparticles are useful for decontamination process and they open the way in the study of the self-irradiation and self-containment of radionuclides
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Taushanoff, Stefanie. "Development and Characterization of Blue Phases Made From Bent-Core Liquid Crystals." Kent State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=kent1298650764.
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Tian, Linan. "Liquid crystal blue phase for electro-optic displays." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/liquid-crystal-blue-phase-for-electrooptic-displays(0230a0fd-6cbb-4edb-a626-ae981fe75141).html.
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Liquid crystals are a vast and diverse class of materials which ranges from fluids made up of simple rods, polymers and solutions, to elastomers and biological organisms. Liquid crystal phases are neither crystalline, nor a ‘normal’ isotropic liquid, but lie somewhere in between these two common states of matter. Liquid crystals have found enormous use in display devices due to their electro-optic properties. In this thesis, the optical and electro-optical properties of some chiral liquid crystalline phases are studied. The optical and electro-optical behaviour of liquid crystalline blue phases has been investigated via a detailed analysis of the reflection spectrum from thin, vertical field (VF) cells. Spectral analysis in this thesis was performed using a numerical fitting technique based on the Berreman 4x4 matrix method. The validity of the technique was proved through comparisons of independent measurements with the calculated physical parameters. A novel Kerr effect measurement method was proposed in this thesis and a known material was used to verify this new method. The Kerr constant together with its dispersion relation was measured using a white light source. An unusually large Kerr constant, K, is determined in the blue phases of a non-polymer stabilized material, ~ 3x10-9 mV-2 (BPI). The large value of K is attributed to significant pre-transitional values of the dielectric anisotropy and birefringence. K follows an inverse dependence on temperature which is more marked in BPII than BPI, and we consequently suggest that the BPI demonstrates properties best suited to electro-optic devices. The field effects in blue phase include electrostriction and the influence of the Kerr effect was separated from electrostriction phenomena for the first time in this work. Finally in the Kerr effect measurements, the Kerr constant in the optically isotropic dark conglomerate phase of a bent-core material was studied for the first time, with rather low values, ~1x10-11 mV-2. The low Kerr constant can be understood in the context of the physical properties of the material. Supercooling phenomena in the blue phase were studied through an analysis of the optical properties in thin cells. Features including the Bragg reflection peak jump and hysteresis are measured through the reflection spectra. A blue phase sample with a single orientation over an area of millimeters was prepared to help the spectra study of the blue phases. Although some previous reports indicated that there may be a new blue phase in the supercooled region, we find that there is no evidence shows that the supercooled blue phase has a different structure from the BPI.Chiral molecules have been included as dopants in achiral bent-core materials to produce a range of new chiral mixtures. Different host materials and chiral dopants have been used to produce several chiral nematic materials in which the chiral nematic phase, the underlying smectic phase and the blue phases are examined. The order parameter is determined as a function of temperature in the chiral nematic phase, and compared to that determined for several calamitic materials; no discernible difference is found. A study of the pitch divergence in the chiral nematic phase of the bent-core mixtures shows interesting properties at both low temperature (as the smectic phase is approached) and at high temperatures (at the transition to the blue phase). An unusual phase separation of the chiral dopant in the mixtures is reported, and details are deduced through a comparison between different mixtures. It is found that a dopant with similar clearing point to the bent-core material has less likelihood of phase separation. Although the blue phase temperature range is extended in these mixtures in comparison with typical values for calamitic materials, it does not extend beyond 2K in any of the materials. Both blue phase I and the fog phases are observed in these chiral bent core systems, but no BPII is observed in any of the materials studied. The small k33 (~ 2.8 pN at 10 K below clearing point) in the bent-core host material is suggested as one of the reasons that the blue phase range is not enhanced as much as may have been expected from reports by other authors.
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Blue, Kathleen M. "Does education come in pink or blue? the effect of sex segregation on education /." Online pdf file accessible through the World Wide Web, 2009. http://archives.evergreen.edu/masterstheses/Accession89-10MIT/Blue_KMITthesis2009.pdf.
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Pešat, David. "Doplnění interaktivního režimu vývojového prostředí BlueJ o podporu práce s datovody." Master's thesis, Vysoká škola ekonomická v Praze, 2015. http://www.nusl.cz/ntk/nusl-262274.
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Main objective of this thesis is to extend existing functionality of Integrated Development Environment (IDE) BlueJ with possibility of working with streams in an interactive mode. This new functionality helps to falicitate and improve teaching of programming within the First Architecture methodology. First part of this thesis deals with IDE BlueJ and discusses problematic software con-structions which don´t have sufficient support in interactive mode. Main focus is put on streams. Another part of this thesis suggests possible options for extension which should be integrated to the existing functionality. Following part focuses on analysis of the proposed changes and final part discusses implementation itself and describes author´s process of realization.
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Sharp, L. Kathryn, and Cathy Whaley. "Diversity, Equity, and the Common Core Blues: Dispositions as a Compass." Digital Commons @ East Tennessee State University, 2012. https://dc.etsu.edu/etsu-works/4277.
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FERRACCI, SERGE. "Conditions de creation d'une maison de reeducation fonctionnelle sur la cote bleue." Aix-Marseille 2, 1988. http://www.theses.fr/1988AIX20425.
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challa, Pavan Kumar. "OPTICAL STUDIES OF BLUE PHASE III, TWIST-BEND AND BENT-CORE NEMATIC LIQUID CRYSTALS IN HIGH MAGNETIC FIELDS." Kent State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=kent1397825912.
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He, Ruojun. "Square Coded Aperture: A Large Aperture with Infinite Depth of Field." University of Dayton / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1418078808.
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Procaccini, Simona. "At last Etta james: Il canto come autobiografia." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/8212/.
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Questa tesi è un tentativo di analizzare il percorso artistico di Etta James, prendendo in considerazione le varie influenze che hanno contribuito a formare la sua personalità artistica a livello canoro ed interpretativo.
Si parte da uno spaccato sull’importanza del gospel come genere propedeutico ad un’interpretazione efficace per l’artista afroamericano.
Successivamente si passa all’immagine che Etta James si costruisce per sé e come questa influenza la sua vita, quali sono le canzoni che non le paiono in linea con la sua immagine e come mentre tenta di districarsi attraverso diversi altri generi, come blues, rock, funk.
Poi viene analizzata la figura della madre biologica di James e come questa venga collegata indissolubilmente alla figura di Billie Holiday, e come trovare la maturità di affrontare quest’ultima farà in modo che anche il rapporto con la figura materna cambi.
Viene analizzato uno dei più grandi successi della cantante, “At Last”, di cui lei è interprete ma non autrice, ma attraverso una grande abilità stilistica riesce a formare quello che sarà uno standard per gli artisti contemporanei.
Ed infine si tirano le somme guardando al retaggio artistico che ha lasciato dietro di sé l’artista.
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Khan, Muhammad Ahsan. "CFD Applications for Wave Energy Conversion Devices (MoonWEC) and Turbulent Fountains for Environmental Fluid Mechanics." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.
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This thesis is based on two studies that are related to floating wave energy conversion (WEC) devices and turbulent fountains. The ability of the open-source CFD software OpenFOAM® has been studied to simulate these phenomena. The CFD model has been compared with the physical experimental results.
The first study presents a model of a WEC device, called MoonWEC, which is patented by the University of Bologna. The CFD model of the MoonWEC under the action of waves has been simulated using OpenFOAM and the results are promising. The reliability of the CFD model is confirmed by the laboratory experiments, conducted at the University of Bologna, for which a small-scale prototype of the MoonWEC was made from wood and brass.
The second part of the thesis is related to the turbulent fountains which are formed when a heavier source fluid is injected upward into a lighter ambient fluid, or else a lighter source fluid is injected downward into a heavier ambient fluid. For this study, the first case is considered for laboratory experiments and the corresponding CFD model. The vertical releases of the source fluids into a quiescent, uniform ambient fluid, from a circular source, were studied with different densities in the laboratory experiments, conducted at the University of Parma. The CFD model has been set up for these experiments. Favourable results have been observed from the OpenFOAM simulations for the turbulent fountains as well, indicating that it can be a reliable tool for the simulation of such phenomena.
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Tiepo, Angélica Nunes. "Efeitos da associação de bactérias promotoras do crescimento em mudas de Trema micrantha (L.) Blume (Cannabaceae) e Cariniana estrellensis (Raddi) Kuntze (Lecythidaceae), sob condições de déficit hídrico no solo." Universidade Estadual de Londrina. Centro de Ciências Biológicas. Programa de Pós-Graduação em Ciências Biológicas, 2017. http://www.bibliotecadigital.uel.br/document/?code=vtls000212507.
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Inoculantes contendo bactérias promotoras de crescimento em plantas (BPCP) são uma alternativa para um manejo sustentável de ecossistemas e podem promover maiores sucessos na aclimatação de mudas de espécies arbóreas a fatores abióticos. O presente estudo teve como objetivo avaliar o efeito da inoculação de quatro espécies de bactérias (Azospirillum brasilense - Ab-V5, Methylobacterium komagatae - ZM, Azomonas sp. e Azorhizophillus sp.) sobre o metabolismo e o crescimento de raízes e folhas de mudas das espécies arbóreas neotropicais Trema micrantha e Cariniana estrellensis, sob condições de déficit hídrico (DH) no solo. E ainda, contribuir para o desenvolvimento de ferramentas biotecnológicas que auxiliem na produção de mudas mais tolerantes, e que possam ser utilizadas na recuperação de áreas onde há falta de água decorrente de eventos de desmatamento. Foram avaliados o status hídrico, crescimento, trocas gasosas, metabolismo do carbono e do nitrogênio e proteção contra os danos causados pelo estresse oxidativo das mudas. T. micrantha apresentou aumento no potencial de água quando inoculada com Azorhizophillus sp. e C. estrellensis quando inoculada com Azomonas sp. Redução de prolina foi observada em mudas de T. micrantha inoculadas com Ab-V5, Azomonas sp. e Azorhizophillus sp., indicando maior capacidade de ajuste osmótico nessas condições. A massa seca da raiz e da parte aérea não diferiram em ambas as espécies vegetais quando inoculadas com ZM e Azorhizophillus sp, o que indica maior compatibilidade entre BPCP-planta favorecendo a manutenção da biomassa sob estresse. As trocas gasosas mostraram maior atividade nas mudas de ambas espécies associadas com Ab-V5, representada por maior eficiência instantânea de carboxilação. O menor dano causado pelo estresse oxidativo foi observada apenas em T. micrantha quando inoculada com ZM, devido à redução do conteúdo de peróxido de hidrogênio e da peroxidação lipídica. Ainda, mudas inoculadas com ZM apresentaram maior atividade da enzima nitrato redutase em ambas espécies. Em suma, múltiplos mecanismos são desenvolvidos no processo de tolerância ao DH no solo. E a inoculação das BPCP às mudas de espécies arbóreas favorece a ativação de processos metabólicos que levam à melhor qualidade fisiológica e ao aumento da tolerância ao DH em mudas de T. micrantha e C. estrellensis. Esses processos favorecem o aumento do potencial de sobrevivência dessas mudas quando submetidas à situação de desafio. Em especial, para a espécie pioneira (T. micrantha), a melhor resposta em relação ao DH foi observada quando as mudas foram inoculadas com ZM, enquanto na espécie não pioneira (C. estrellensis) esses dados foram obtidos quando as mudas foram inoculadas com ZM e Ab-V5. Esses dados corroboram a evidência de compatibilidade entre as BPCP e essas espécies vegetais, e indicam quais espécies de bactérias poderiam ser usadas em trabalhos futuros associadas com essas espécies arbóreas, visando a melhor qualidade de mudas quando submetidas a condições de desafio, como o transplantio para o campo.Inoculants containing plant growth promoting bacteria (PGPB) are tools for sustainable management that may improve the successe in the acclimation of seedlings to abiotic factors. This study aimed to evaluate the inoculation of four bacterium species (Azospirillum brasilense - Ab-V5, Methylobacterium komagatae - ZM, Azomonas sp and Azorhizophillus sp.) on root and leaf metabolism of neotropical tree species Trema micrantha and Cariniana estrellensis, under drought conditions in soil (WD). Also, to contribute to the development of biotechnological tools that aid in the production of more tolerant seedlings, and that can be used in the recovery of areas where there is drought due to deforestation events. Water status, growth, gas exchange, carbon and nitrogen metabolism, and protection against oxidative stress were evaluated. T. micrantha showed an increase in water potential when inoculated with Azorhizophillus sp. and C. estrellensis when inoculated with Azomonas sp. Proline reduction was observed in T. micrantha seedlings inoculated with Ab-V5, Azomonas sp. and Azorhizophillus sp., indicating increase in osmotic adjustment capacity in these conditions. Root and shoot dry weights did not differ in both species when inoculated with ZM and Azorhizophillus sp, indicating higher compatibility between PGPB-plant favoring biomass maintenance. The gas exchange metabolism showed higher activity in seedlings of both species inoculated with Ab-V5, as indicated by higher instantaneous carboxylation efficiency. The smallest oxidative stress damage was observed only in T. micrantha when inoculated with ZM, it was due to the reduction of hydrogen peroxide content and lipid peroxidation. Seedlings inoculated with ZM showed increase in nitrate reductase activity in both species. Multiple mechanisms are developed in the process of drought tolerance. The PGPB association with the tree seedlings favors the activation of metabolic processes that enhanced the physiological quality and increased tolerance to drought in Trema micrantha and Cariniana estrellensis seedlings. These processes increased the survival of these seedlings when submitted to challenging situations. For the pioneer specie (T. micrantha), the best response to drought was observed when the seedlings were inoculated with ZM, whereas in the non-pioneer specie (C. estrellensis), these data were obtained when the seedlings were inoculated with ZM and Ab-V5. These data corroborate the compatibility evidence in PGPB-plant, and indicate which bacterium species could be used in futures studies associated with these tree species, aiming higher quality of these seedlings when submitted to challenging conditions, such as transplanting to the field.
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Dia, Nada. "Nanoparticules photomagnétiques et agents de contraste à base de réseaux de coordination." Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-00813757.
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L'état d'art concernant l'élaboration des matériaux inorganiques multifonctionnels, à l'échelle nanométrique, a fait l'objet de nombreuses recherches depuis vingt ans. Les réseaux de coordination tridimensionnels d'analogues de bleu de Prusse présentent des propriétés magnétiques modulables par l'application d'un stimulus extérieur (champ magnétique, irradiation lumineuse, pression ou variation de température etc...) qui mènent à une variété d'applications notamment pour le stockage de l'information et pour l'imagerie médicale. C'est dans ce cadre que s'inscrit ce travail de thèse.L'objectif principal porte sur la synthèse, la caractérisation chimique et structurale et l'étude des propriétés magnétiques, photomagnétiques et de relaxivité de nano-objets multicouches de ces réseaux. Dans une première partie, nous avons cherché à élaborer des nanoparticules de l'analogue CsCoFe(CN)6 du bleu de Prusse photomagnétique de tailles bien contrôlées. La synthèse met en jeu plusieurs facteurs qui influent la taille et l'homogénéité des particules. Ainsi une croissance contrôlée de la taille a été obtenue permettant de sonder l'effet de la taille sur la réponse photomagnétique. L'assemblage de ces particules sur un substrat de graphite orienté HOPG a permet d'obtenir une monocouche compacte sur plusieurs microns qui conduit à une croissance de films d'épaisseurs contrôlées. Le comportement photomagnétique a été étudié sur ces films. Dans la deuxième partie, nous nous sommes également intéressés à combiner, toujours à l'échelle nanométrique, cet analogue photomagnétique à un autre réseau ferromagnétique CsNiCr(CN)6 dans le but de créer une réponse exaltée sous lumière à plus haute température. Un comportement synergique est observé dans de telles hétérostructures et se manifeste par (i) une aimantation présentant un renversement uniforme des deux composantes et (ii) une augmentation photo-induite de l'aimantation qui persiste jusqu'à la température d'ordre du ferromagnétique.La dernière partie est consacrée à la synthèse d'agents de contraste nanométriques de réseaux de coordination. D'une part, des nanoparticules de bleu de Prusse KFeFe(CN)6 de tailles différentes ont été synthétisées avec un excellent contrôle de la taille. Les valeurs de relaxivité de la composante longitudinale T1 du temps de relaxation montrent une dépendence de la taille et du taux d'atomes paramagnétiques en surface. D'autre part, nous avons élaboré un alliage MnxIn1-xFe(CN)6 avec différentes proportions en manganèse, différentes tailles ont été obtenues en fonction du taux de manganèse inséré. Nous avons démontré que les ions MnII sont localisés en surface dans une structure proche de la structure cœur-coquille qui explique les valeurs élevées observées. Les valeurs élevées de la relaxivité de ces particules en font d'excellents candidats en tant qu'agents de contraste pour l'imagerie à résonance magnétique (IRM). Afin d'explorer leurs potentialités, les particules de KFeFe(CN)6 de 6 nm et de Mn0.3In0.7Fe(CN)6, présentant la plus grande valeur de relaxivité, ont été enrobées par un polymère fluorescent biocompatible et internalisées au sein des cellules vivantes. Des tests de toxicité ont été aussi effectués.
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Soni, Shilpa. "Francisella tularensis blue-grey phase variation involves structural modifications of lipopolysaccharide O-antigen, core and lipid A and affects intramacrophage survival and vaccine efficacy." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1291216526.
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Aydintan, David Arif. "Die kartellrechtliche Zulässigkeit der Regionalkodierung auf DVD, Blu-ray Disc und HD-DVD : nach Art. 81 EG, [Para] 1 GWB und internationalen Abkommen /." Hamburg : Kovač, 2008. http://swbplus.bsz-bw.de/bsz287785262cov.htm.
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Lejeune, Julien. "Propriétés de commutation des analogues CoFe du bleu de Prusse : vers un contrôle de la position en énergie des états stable et métastable." Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-00853239.
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Les composés à commutation électronique constituent une large famille de systèmes particulièrement prometteuse, notamment pour le stockage de l'information à l'échelle moléculaire. Parmi ces composés, les analogues du bleu de Prusse cobalt-fer (ABP AxCoFe) sont des polymères inorganiques formés d'enchaînements Co-N≡C-Fe pouvant présenter deux états électroniques CoII(HS)-N≡C-FeIII(BS) et CoIII(BS)-N≡C-FeII(BS) (HS : haut spin ; BS : bas spin) aux propriétés structurales et électroniques bien distinctes. La transition électronique entre ces deux états peut être contrôlée de manière réversible par une grande variété de paramètres chimique (insertion de cations alcalins) et physiques (température, pression, irradiation). Ces propriétés de photo-commutation sont particulièrement intéressantes pour le développement de mémoires optiques à l'échelle moléculaire.Afin de comprendre les propriétés électroniques des ABP AxCoFe, nous nous sommes intéressés à l'interaction entre les centres métalliques via le pont cyanure dans l'enchaînement Co-N≡C-Fe, aussi bien sur un plan expérimental (mise en œuvre de techniques d'analyse reposant sur l'utilisation du rayonnement synchrotron) que théorique (modélisation ab initio de type post-Hartree-Fock). Nous avons également étudié la nature de l'interaction, démontrée expérimentalement, entre les cations alcalins et le réseau bimétallique formé par les enchaînements Co-N≡C-Fe. Finalement, la pertinence du modèle à deux états, habituellement utilisé pour rendre compte des propriétés électroniques des systèmes commutables, est discutée, avec la mise en évidence de multistabilités au sein des ABP AxCoFe. Ce travail propose ainsi une étude la plus complète possible des phénomènes électroniques rencontrés dans ces systèmes.
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Salles, Murilo Auler e. "Análise quantitativa do corante azul de Evan extravasado do interior das câmaras internas dos implantes por suas interfaces protéticas nas condições: Hexágono Externo (HE) - Hexágono Interno (HI) - Cone Morse (CM)." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/25/25146/tde-14122011-091248/.
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Busca-se em pesquisas e estudos avaliar a capacidade de adaptação e selamento entre a conexão implante/intermediário de diferentes sistemas de implantes odontológicos. Observou-se recentemente que implantes com abutments retidos com parafusos, diversos fenômenos como afrouxamento e fratura do parafuso, rotação e fratura do abutment com penetração bacteriana nas câmaras internas dos implantes, acontece como conseqüência da desadaptação interface implante/abutment. É descrito ao nível desta região um pequeno espaço microgap, fator relevante para remodelamento da crista óssea e longevidade da saúde dos tecidos moles periimplantares. O propósito do estudo foi investigar o extravasamento da solução do corante azul de Evan em três tipos de implantes e seus respectivos intermediários, durante um período de seis (6) dias, a cada vinte e quatro (24) horas, com intervalo em cento e vinte (120) horas, através da agitação proporcionada por uma mesa agitadora. Para tal, foram utilizados trinta (30) implantes, dez (10) de cada tipo, com seus respectivos intermediários protéticos, minipilares, sendo o Grupo Um (1) de implantes Hexágono Externo (HE), Grupo dois (2) de Hexágono Interno (HI) e Grupo três (3) de Cone Morse (CM). No interior de cada implante foi pipetado volume ou quantidade proporcional ao seu espaço interno uma solução de corante azul de Evan. Após a colocação do corante no interior dos implantes, os abutments ou intermediários foram acoplados e aparafusados com torque de vinte (20) Ncm, através do torquímetro de Gauge (Tohnichi), e estes depositados individualmente em micro tubos de cor âmbar na condição de intermediários voltados para baixo. Segui/se imediatamente a colocação de (1)ml de água deionizada. A seguir os tubos foram fechados hermeticamente e posicionados numa mesa suporte para microtubos e foram armazernados por 24 horas, sem agitação. Posteriormente foram agitados por 10 minutos com movimentos uniformes em mesa agitadora e a partir deste momento iniciou/se a coleta de uma pequena quantidade de água de cada micro tubo onde por sua vez estas amostras foram analisadas por absorbância através do método de fotometria, espectrofotometria, onde mostraram o extravasamento da solução do corante azul de Evan nos sistemas de implantes usados. Do inicio da coleta das amostras no tempo de (24 horas) até a condição no terceiro dia ou setenta e duas horas, os três sistemas não mostraram/se alterações estatisticamente significantes. A partir do tempo quarto dia ou 96 h., no sistema do grupo Cone Morse, revelou diferenças estatisticamente significantes entre o grupo HE e HI. Os resultados foram tabulados e o teste estatístico Anova há dois critérios e aplicados a eles o teste Tukey comparação entre todos, com o nível de significância de p<0.05. Os resultados do teste de vinte e quatro (24); quarenta e oito (48), setenta e duas (72), não havendo diferenças estatisticamente significantes, ao passo que no período de noventa e seis (96) e cento e quarenta e quatro(144) horas, mostrou a solução do corante de azul de Evan do sistema CM, o xtravasamento estatisticamente significante maior do que nos grupos HE e HI. Conclui/se, portanto, que houve extravasamento nos três sistemas na condição inicial. No tempo 96 houve um maior extravasamento do sistema CM perpetuando até o final do experimento, mostrando-se estaticamente diferente em relação aos sistemas HE e HI.Research and studies seek to evaluate the capacity of adaptation and sealing between the implant-intermediate connections of different dental implant systems. It has recently been observed that in implants with screw-retained abutments, various phenomena, such as screw4 loosening and fracture, rotation and fracture of the abutment with bacterial penetration into the internal chambers of the implants have occurred as a result of maladaptatation at the implant-abutment interface. At the level of this region, a small space known as a microgap is described, and is a relevant factor in remodeling of the crestal bone and peri-implant soft tissue health in the long term. The purpose of this study was to investigate the extravasation of Evans blue dye solution in three types of implants and their respective intermediates during a period of six (6) days, every twenty-four (24) hours, with an interval in one hundred and wenty (120) hours, by means of agitation provided by an agitating table. To do this, thirty (30) implants were used, ten (10) of each type, with their respective prosthetic intermediates and mini-abutments, divided into groups as follows: Group One (1) External Hexagon implants (EH), Group Two (2) Internal Hexagon (IH) and Group three (3) Morse Cone (MC). Into the interior of each implant, Evans blue dye solution was inserted with a pipette in a volume or quantity proportional to its internal space. After the dye was put into the implants, the abutments or intermediates were coupled and the screws tightened to a torque of twenty (20) Ncm, with a Gauge torque meter (Tohnichi), and they were individually deposited in amber-colored microtubes positioned so that the intermediates faced downwards. This was immediately followed by the placement of (1)ml of deionized water. Next, the tubes were hermetically closed and placed on a table with a microtube holder and stored for 24 hours, without agitation. Afterwards they were agitated for 10 minutes on an agitating table making uniform movements and from then on, a small quantity of water began to be collected from each microtube, where in turn these samples were analyzed by absorbance method of photometry, spectrophotometry, in which they showed the extravasation of the Evans blue dye solution in the implant system used. From the beginning of sample collection at the time of (24hours) until the condition on the third day or at seventy-two hours, the three systems showed no statistically significant alterations. From the fourth day, or at the time of 96 h., in the Morse Cone Group system, statistically significant differences were revealed between Group EH and IH. The results were tabulated and the ANOVA statistical test for two criteria and the Tukey test were applied for comparison among all the groups, with a level of significance of p<0.05. The results of the twenty-four-hour (24); forty-eight (48), seventy-two hour tests (72), there were no statistically significant differences, whereas in the period of ninety-six (96) and one hundred and forty-four (144) hours, showed the Evans blue dye solution extravasation from the MC system to be greater with statistical significance than in Groups EH and IH. It was therefore concluded that there was extravasation in the three systems in the initial condition. At the time of 96 there was greater extravasation from the MC system, which was perpetuated up to the end of the experiment, showing it to differ statistically in comparison with the EH and IH systems.
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Adam, Adeline. "étude du couplage élastique au sein d'hétérostructures cœur-coquille à base d'analogues du bleu de Prusse." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLX076/document.
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Le contrôle optique des propriétés physiques d’un matériau suscite l’intérêt des scientifiques pour des enjeux aussi bien fondamentaux qu’appliqués. L’axe de recherche original que nous avons développé dans le cadre de ce travail de thèse visait à la réalisation et l’étude d’hétérostructures moléculaires photo-magnétiques dans des gammes de température susceptibles d’applications. L’approche proposée consistait à élaborer des hétérostructures de type multiferroïque constituées de deux phases, l’une piézomagnétique et l’autre photo-strictive. L’idée était d’optimiser le couplage, d’origine élastique, entre ces propriétés pour permettre l’observation d’effets photo-magnétiques à des températures plus élevées que celles rapportées pour les matériaux monophasés. La couche photo-strictive peut se déformer sous irradiation lumineuse, générant des contraintes biaxiales dans la couche magnétique. Si celle-ci présente une forte réponse piézomagnétique, son aimantation peut être fortement modifiée, notamment au voisinage du point de Curie, allant jusqu’à un éventuel décalage de la température critique sous contrainte. Les composés moléculaires analogues du Bleu de Prusse, de formule générique AxM[M’(CN)6]y . zH2O (où A est un alcalin et M,M’ des métaux de transition), semblaient particulièrement adaptés à l’élaboration de telles hétérostructures. Nous avons utilisé le composé Rb0,5Co[Fe(CN)6]0,8 . zH2O pour la phase photo-strictive, au coeur, et Rb0,2Ni[Cr(CN)6]0,7 . z’H2O ou K0,2Ni[Cr(CN)6]0,7 . z’H2O pour la phase magnétique, en coquille. Ces deux phases présentent un désaccord paramétrique de 5,3%.L’objectif principal de ce travail de thèse était de comprendre et de contrôler le couplage élastique entre le cœur et la coquille. Nous avons ainsi dans un premier temps mis en évidence l’existence de ce couplage, la présence de la coquille modifiant les propriétés de photo-commutation du cœur et la déformation du réseau cristallin du cœur étant partiellement transmise à la coquille, induisant des modifications structurales et magnétiques de la coquille. Nous nous sommes dans un second temps intéressés à différents paramètres pouvant influence le couplage. D’abord en étudiant des paramètres géométriques, en faisant varier la taille des particules de cœur, l’épaisseur de la coquille et la microstructure de la coquille. Nous avons à cette occasion mis en évidence les facteurs régissant la croissance des particules de cœur et de la coquille. Ces études ont révélé que le rapport volumique entre le cœur et la coquille contrôlait la qualité du couplage, et que des modifications de la microstructure avait une influence à la fois sur les propriétés de photo-commutation du cœur, mais aussi sur la réponse de la coquille. Enfin, nous avons étudié des coquilles de nature chimique différente pour changer le désaccord paramétrique entre le cœur et la coquille. Il en ressort qu’en diminuant le désaccord, on améliore le couplage, mais cela se traduit notamment par une rétroaction de la coquille plus forte. Si cette rétroaction devient trop importante, le réseau du cœur ne peut plus se déformer. Il s’agit donc de trouver un compromis entre force du couplage et force de la rétroaction de la coquille. Finalement, nous avons mis en évidence le fait que l’on ne peut pas simplement associer l’effet de la coquille à un effet de pression hydrostatique, mais que le couplage des réseaux cristallins joue un rôle important dans la synergie entre les deux phasesThe optical control of the physical properties of a material has drawn considerable attention during the past few years for a fundamental point of view and for applications. The originality of the project developed during this thesis was based on the synthesis and the study of photo-magnetic heterostructures in a temperature range convenient for applications. The approach consisted of developing multiferroic-like heterostructures that associate a piezomagnetic phase and a photo-strictive phase. The idea was to exploit the coupling of elastic origin between these properties, to allow the observation of photo-magnetic effects at temperatures higher than those reported for single-phase materials. The photo-strictive phase can deform under light irradiation, generating biaxial strain in the magnetic phase. If the piezomagnetic response of the latter is high enough, its magnetization could be modulated, especially at the vicinity of the Curie temperature, with a possible shift of the critical temperature under stress. In this project, we focused on molecular solids based on polycyanometallates, namely Prussian blue analogues, whose generic formula is AxM[M’(CN)6]y . zH2O (where A is an alkali metal and M,M transition metals). We used the compound Rb0,5Co[Fe(CN)6]0,8 . zH2O for the photo-strictive phase and Rb0,2Ni[Cr(CN)6]0,7 . z’H2O or K0,2Ni[Cr(CN)6]0,7 . z’H2O for the magnetic phase. These two phases have a lattice mismatch of 5.3%The main objective of this work was to understand and to control the elastic coupling between the core and the shell. We first highlighted the existence of this coupling, the presence of the shell changing the photo-switching properties of the core, and the deformation of the crystalline lattice of the core inducing structural and magnetic modifications in the shell. Then, we focused on the study of different parameters which can have an impact on the behavior of the heterostructures under light irradiation. We showed that the volumic ratio between the core and the shell is a key factor to control the efficiency of the coupling. The microstructure of the shell can also play an important role, but is not as well understood. In the end, we studied other Prussian blue analogs shells in order to change the lattice mismatch between the core and the shell. We could evidence that by reducing the lattice mismatch we tend to increase the coupling, but if this coupling is to strong, the retroaction of the shell hinders completely the dilatation of the core lattice. The idea is also to find a compromise between the strength of the coupling and the strength of the shell retroaction. In the end, we proved that we cannot associate the effect of the shell to an hydrostatic pressure, but that the coupling of the crystalline lattices play an important role in the synergy between the two phases
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Gintrac, Elie. "Recherches analytiques sur diverses affections dans lesquelles la peau présente une coloration bleue, et en particulier sur celles que l'on a désignées sous les noms de cyanose ou maladie bleue thèse inaugurale présentée et soutenue à la Faculté de médecine de Paris le 18 août 1814 /." Paris : BIUM, 2003. http://www.bium.univ-paris5.fr/histmed/medica/cote?TPAR1814x095.
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Jacobs, Bidhan. "Vers une esthétique du signal. Dynamiques du flou et libérations du code dans les arts filmiques (1990-2010)." Thesis, Paris 3, 2014. http://www.theses.fr/2014PA030089.
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Au cours de la décennie 1990, l'introduction puis l’expansion accélérée du numérique par les industries techniques ont favorisé le développement dans les arts filmiques d’un courant critique spontané et collectif portant sur le signal. Nous élaborons une histoire des techniques et des formes esthétiques critiques du signal, en faisceaux de segments, selon une taxinomie qui prolonge le structuralisme matériologique des années 70 (Malcolm Le Grice, Peter Gidal, Paul Sharits, Anthony McCall). Cette histoire embrasse et met en perspective cinéma, vidéo et numérique, de manière à réorganiser nos conceptions distinctes de ces champs selon le domaine des sciences (duquel dépendent détection, codification et visualisation du signal). Nous proposons une histoire des techniques à rebours sous l’angle particulier de la computation du signal, processus systématique commun à l’ensemble des technologies filmiques et entendu comme un ensemble de règles opératoires propres à un traitement calculatoire de données. Dans la double tradition d’une part de Jean Epstein, Marcel L’Herbier ou Jean Renoir, et de l’autre du structuralisme expérimental (Paul Sharits, Malcolm Le Grice…), de nombreux artistes contemporains, tels Paolo Gioli, Philippe Grandrieux, Peter Tscherkassky, Marylène Negro, Leighton Pierce, Augustin Gimel, Jacques Perconte ou HC Gilje (pour n’en mentionner que quelques uns), ont élaboré une intelligence du signal grâce à deux entreprises critiques simultanées. La première, au registre du dispositif, conteste la technologie programmante et vise les libérations du code ; la seconde, au registre de l’image, conteste les normes de visualité et enrichit les palettes visuelles et sonores du flou. Nous tentons d’établir, formuler et organiser les logiques qui, traversant et déterminant la diversité des initiatives artistiques dont nous observons les spécificités et singularités, relèvent d’un même combat artistique contre la standardisationDuring the 90s, with the introduction, then accelerated expansion of digital by the technical industries, has promoted the development of a spontaneous and collective critical current on the signal in the filmic arts. We develop a history of technics and critical aesthetic forms of signal, in beam segments, according to a taxinomy that extends the 70s’ materiologic structuralism (Malcolm le Grice, Peter Gidal, Paul Sharits, Anthony McCall). This history embrace film, video and digital, to reorganize our different conceptions of these fields according to the scientific viewpoint (which detection, codification and display of the signal depend on). We propose a backward technological history from the viewpoint of the signal computation, a systematic process common to all filmic technologies, and understood as a set of operating rules specific to computational data processing.In the double tradition, first of Jean Epstein, Marcel L'Herbier or Jean Renoir, on the other hand experimental structuralism (Paul Sharits, Malcolm Le Grice...), many contemporary artists such as Paolo Gioli, Philippe Grandrieux Peter Tscherkassky, Marylène Negro, Leighton Pierce, Augustin Gimel, Jacques Perconte or HC Gilje (just to mention a few) has developed a signal intelligence thanks to two simultaneous critical enterprises. The first, on the register of the apparatus, challenges the programming technology and aims the liberation of the code ; the second, on the register of the image, challenges the norms of the visuality and expand the visual and sound palettes of blur. We try to formulate and organize the logics which, crossing and determining the diversity of artistic initiatives whom we observe specificities and singularities, belong to the same artistic battle against standardization
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Robinson, Kenneth Patrick. "Cooperation using a robotic ad hoc network made from Bluetooth, JXTA, OSGi and other commercial off the shelf (COTS) products." Queensland University of Technology, 2008. http://eprints.qut.edu.au/26038/.
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Abstract - Mobile devices in the near future will need to collaborate to fulfill their function. Collaboration will be done by communication. We use a real world example of robotic soccer to come up with the necessary structures required for robotic communication. A review of related work is done and it is found no examples come close to providing a RANET. The robotic ad hoc network (RANET) we suggest uses existing structures pulled from the areas of wireless networks, peer to peer and software life-cycle management. Gaps are found in the existing structures so we describe how to extend some structures to satisfy the design. The RANET design supports robot cooperation by exchanging messages, discovering needed skills that other robots on the network may possess and the transfer of these skills. The network is built on top of a Bluetooth wireless network and uses JXTA to communicate and transfer skills. OSGi bundles form the skills that can be transferred. To test the nal design a reference implementation is done. Deficiencies in some third party software is found, specifically JXTA and JamVM and GNU Classpath. Lastly we look at how to fix the deciencies by porting the JXTA C implementation to the target robotic platform and potentially eliminating the TCP/IP layer, using UDP instead of TCP or using an adaptive TCP/IP stack. We also propose a future areas of investigation; how to seed the configuration for the Personal area network (PAN) Bluetooth protocol extension so a Bluetooth TCP/IP link is more quickly formed and using the STP to allow multi-hop messaging and transfer of skills.
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Chaurand, Julie. "La cohérence interterritoriale des projets de continuités écologiques. L’exemple de la politique Trame verte et bleue en France." Thesis, Paris, Institut agronomique, vétérinaire et forestier de France, 2017. http://www.theses.fr/2017IAVF0016/document.
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La Trame verte et bleue (TVB) a pour objectif la préservation et la remise en « bon état » des continuités écologiques (CE). Cette politique publique veut être un outil d’aménagement du territoire. Elle est inscrite à la fois dans le code de l’environnement et de l’urbanisme. Elle se décline à différents niveaux de gouvernance, du national au local en passant par le régional. La cohérence entre ces niveaux est cadrée par la loi française. Mais une importante marge d’interprétation et de mise en œuvre de la politique est laissée aux territoires. Dans cette thèse, nous interrogeons les conditions permettant d’assurer la cohérence entre les projets des territoires ayant trait à la planification des CE. Pour cela, nous répondons à deux principales hypothèses sources de (in)cohérence : (i) l’incomplétude de la connaissance existante en écologie du paysage et son utilisation dans les territoires et, (ii) les processus de gouvernance mis en place pour saisir la marge d’adaptation de la politique, avec un focus sur les acteurs « relais » entre les projets des territoires. Ainsi, nous développons une notion de la « cohérence interterritoriale » basée sur le partage entre les acteurs des territoires d’une vision de l’organisation de l’espace. Nous en tirons une grille d’analyse de cette cohérence appliquée aux projets portant sur les CE. Cette grille présente trois volets : la dimension écologique, la multifonctionnalité et la gouvernance. Ces volets sont assortis de critères et d’indicateurs. La grille d’analyse a été appliquée à différents projets portés par des territoires « emboités » du niveau national au local, dans les régions Bretagne et Occitanie (pour l’ancienne région Languedoc-Roussillon). L’analyse est d’abord spécifique à chaque projet puis est ensuite comparative, de façon verticale entre les niveaux de gouvernance et horizontale entre mêmes niveaux de gouvernance. Nous montrons que la préservation des CE est un « wicked mess problem », dans le sens où il n’existe pas une solution unique et optimale face aux complexités écologiques et sociétales du sujet. Les territoires s’adaptent, traduisent, simplifient et ont leur propre représentation des concepts d’écologie du paysage. Les approches diffèrent du niveau national au local. L’approche naturaliste promue au niveau national devient une approche par l’occupation du sol au niveau local. De même, l’approche écologique devient multifonctionnelle en passant du code de l’environnement au code de l’urbanisme. La loi impose une cohérence descendante entre les territoires ce qui peut être source d’innovation ou au contraire limiter les initiatives par crainte du contentieux juridique. Les acteurs et les projets sont extrêmement divers. La planification des CE est une « patate plus ou moins chaude » que les territoires se repassent les uns aux autres. Les territoires porteurs de schémas de cohérence territoriale (SCoT) ou de plans locaux d’urbanisme (intercommunaux) (PLU(i)) sont souvent identifiés comme les plus pertinents pour traiter le problème. Mais l’application du principe de subsidiarité ne doit pas déresponsabiliser certains territoires, alors que les systèmes socio-écologiques sont de fait inter-échelles et donc interterritoriaux. Le rôle des acteurs « relais » entre les territoires est essentiel à la cohérence interterritoriale pour dynamiser voire créer les proximités organisées entre les territoires. La Trame verte et bleue est actuellement à un tournant suite aux récentes évolutions législatives. Les régions sont identifiées comme cheffes de file sur la biodiversité et sont dotées d’un nouveau schéma régional intégrateur absorbant, notamment, la TVB. La cohérence interterritoriale se construit dans le temps et méritera d’être analysée dans le tempsThe “Trame verte et bleue” (TVB), a French public policy, aims at preserving and restoring ecological networks (EN). It is intended to be a tool for land-use planning. It is part of French law’s codes for the environment and for urbanism. It is meant to be implemented at different governance levels, ranging from the national to the regional to the local. The coherence of the TVB between these levels has been specified in French law. Nevertheless, territories have a wide margin for interpretation and implementation of TVB policy. In this thesis, we examine the conditions necessary for ensuring coherence between territorial projects which pertain to EN planning. To this end, we address two main hypotheses that are sources of (in)coherence: (i) the incompleteness of existing knowledge in landscape ecology and its use in the territories, and (ii) the governance processes put in place to take into account the margin for adaptation of the TVB policy, with a focus on “bridging” actors between territorial projects. We develop a notion of “interterritorial coherence” based on the sharing of a vision between the stakeholders of the organization of space. We propose an analysis grid of this coherence applied to projects related to EN. The grid involves three components: the ecological dimension, the multifunctionality, and the governance processes. These components are characterized by criteria and translated into indicators. The analysis grid has been applied to different projects carried out by “nested” territories ranging from the national to the local level in two French regions (Brittany and Occitania, (formerly called Languedoc-Roussillon region)). The analysis is initially specific to each project and then becomes comparative, vertically between levels of governance and horizontally between the same levels of governance. We show that the preservation of EN is a “wicked mess problem”, in the sense that a single and optimal solution does not exist given the ecological and societal complexities of the subject. The territories adapt themselves, simplify and have their own representation of the concepts of landscape ecology. Approaches differ between the national and the local. The naturalistic approach promoted at the national level becomes a land-use approach at the local level. Similarly, the ecological approach becomes multifunctional by transitioning from the environment code to the urbanism code. The law imposes a top-down coherence between the territories. This can be a source of innovation or, on the contrary, can limit initiatives due to fear of litigation. The actors and projects are extremely diverse. EN planning is a “hot potato” (more or less “hot”) that territories pass to each other. The territories with territorial coherence schemes (SCoTs) or local urban planning plans (PLU) are often identified as the most relevant levels to tackle the problem. Nevertheless, the application of the subsidiarity principle must not disempower certain territories, since socio-ecological systems are inter-scale and therefore interterritorial. The role of “bridging” actors between the territories is essential to interterritorial coherence because they can energize or even create the organized proximities between the territories. The “Trame verte et bleue” policy is currently at a turning point following recent legislative developments. Regions are identified as leaders on biodiversity and have to follow a new integrated regional scheme that includes, in particular, EN. Interterritorial coherence is built up over time and will therefore need to be analyzed over time
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Tonti, Filippo. "Nuovi indicatori empirici dell'evoluzione dinamica dei sistemi stellari." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/24428/.
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Gli ammassi globulari (GCs) sono sistemi collisionali, la cui struttura interna viene progressivamente modificata dalle mutue interazioni gravitazionali tra stelle. La rapidità di questa evoluzione dinamica dipende in maniera complessa da molti fattori. Per questo, GCs con la stessa età cronologica, possono avere "età dinamiche" differenti e questa informazione è necessaria per una descrizione completa di questi sistemi stellari. Determinare l’età dinamica dei GCs dalle loro caratteristiche osservabili, però, è ancora molto difficile. I metodi utilizzati finora presentano diverse limitazioni, che rendono necessari approcci alternativi. Questo lavoro consiste nella prima determinazione da dati osservati di due nuovi indicatori empirici di evoluzione dinamica, recentemente definiti a partire da simulazioni numeriche. Il campione esaminato è costituito da cinque GCs galattici in stadi dinamici differenti. Per ognuno di essi, è stato innanzitutto costruito il profilo di densità proiettata e cercato il modello di King di best-fit. Seguendo la procedura utilizzata nelle simulazioni, è stata poi determinata la distribuzione radiale cumulativa normalizzata (nCRD) delle stelle e, da questa, sono stati misurati i nuovi indicatori dinamici: A5, ovvero l’area sottesa dalla nCRD fino ad una distanza dal centro pari al 5% del raggio di metà massa, e P5, cioè il valore della nCRD a questo stesso raggio. Il confronto tra i risultati così ottenuti, e quelli di indicatori alternativi precedentemente determinati per ciascun ammasso, conferma che sia A5 che P5 crescono progressivamente con l’età dinamica del sistema. Il confronto con il lavoro teorico, inoltre, mostra che vi è anche un’ottima corrispondenza numerica tra i valori osservati e simulati. I risultati ottenuti sono di grande rilevanza e dimostrano come i nuovi parametri possano essere effettivamente utilizzati per la misura empirica del livello di evoluzione dinamica dei sistemi stellari.
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Tjäder, Hampus. "End-to-end Security Enhancement of an IoT Platform Using Object Security." Thesis, Linköpings universitet, Informationskodning, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-138838.
Full textAbstract:
The Internet of Things (IoT) is seen as one of the next Internet revolutions. In a near future the majority of all connected devices to the Internet will be IoT devices. These devices will connect previously offline constrained systems, thus it is essential to ensure end-to-end security for such devices. Object Security is a concept where the actual packet or sensitive parts of the packet are encrypted instead of the radio channel. A compromised node in the network will with this mechanism still have the data encrypted ensuring full end-to-end security. This paper proposes an architecture for using the object security format COSE in a typical constrained short-range radio based IoT platform. The IoT platform utilizes Bluetooth Low Energy and the Constrained Application Protocol for data transmission via a capillary gateway. A proof-of-concept implementation based on the architecture validates that the security solution is implementable. An overhead comparison between current channel security guidelines and the proposed object security solution results in a similar size for each data packet. The thesis concludes that object security should be seen as an alternative for ensuring end-to-end security for the Internet of Things.
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Anton, Andersson, and Johan Runbert. "Cross-platform Mobile Development and Internet of Things : Developing a cross-platform mobile application using web technologies to interact with smart things." Thesis, Linnéuniversitetet, Institutionen för datavetenskap (DV), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-48517.
Full textAbstract:
Today more and more objects in our daily lives are getting connected to the Internet. This phenomenon is called the Internet of Things and is a way for physical things such as cars, buildings or even bus stations to get access and communicate with other objects using the Internet. The problem is that for every Internet of Things device, an application is often needed in order to communicate with these devices. Developing mobile applications in a separate programming language for each operating system can be an expensive and time consuming task. In this thesis, we implement and evaluate a cross-platform mobile solution for users to interact with smart things using the advantages of web technologies. To compare previous findings in this area, two literature reviews has been performed to find out which is the state of the art on cross-platform mobile development frameworks and smart-things technologies used for interacting with physical objects. The result is a mobile application developed using PhoneGap and jQuery Mobile that interacts with iBeacons, where students inside a university building can get directions and schedules for different rooms. The application received good results from a couple of usability studies, and performed well when measuring its performance. The outcome shows that web technologies that exist today are a viable solution to native mobile applications in terms of interacting with smart things such as tagging technologies.
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Alaouieh, Ahmad. "Applications de l'analyse des donnees sur le commerce mondial : (BLE-RIZ-ORGE). Les céréales en France. LES ELECTIONS PRESIDENTIELLES EN FRANCE. LE RECRUTEMENT DES CADRES EN FRANCE. LE REFERENDUM EN NOUVELLE CALEDONIE. CALCULATEURS COMPOSES. CAS MODELE DE L'ANALYSE D'UNE VARIABLE CONTINUE UNIQUE CODEE BARYCENTRIQUEMENT." Paris 6, 1991. http://www.theses.fr/1991PA066004.
Full textAbstract:
Notre recherche est basee sur l'etude statistique de differents modeles a variables quantitatives ou qualitatives. Dans les quatre premieres parties, nous avons etudie les cereales en france et le ble, le riz et l'orge dans le commerce mondial. L'etude quantitative par l'analyse des donnees nous a permis de voir que les principales routes du commerce du grain sont l'australie et l'egypte ainsi que l'argentine et l'italie. Pour les cereales en france, les cooparatives, les negociants et les utilisateurs occupent, selon les regions, une place dont l'importance reste a peu pres stable au cours du temps. La cinquieme partie traite des electrions presidentielles et du referendum caledonien. L'analyse du vote permet d'apprecier dans sa complexite le jeu de l'electorat rallie en mai 1988 par le fn et l'absence du rpr ne saurait etre trop soulignee. La sixieme partie met en jeu l'analyse factorielle et la methode de classification dans l'etude de la diversite des roles devolus aux cadres. Dans la septieme partie, le but du travail est de formaliser completement la structure et le fonctionnement des machines composees notamment destinees a remplir les fonctions de traducteur pour des transformations linguistiques et de demontrer leur equivalence avec des machines du type de turing. Dans la huitieme partie, en se basant sur une etude de l'esperance de vie, nous avons demontre que quelque soit la distribution et le decoupage, les modalites sont rangees dans leur ordre naturel
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Jacobsson, Madeleine. "Dr. Eleine Mad." Thesis, Kungl. Konsthögskolan, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kkh:diva-587.
Full textAbstract:
Dr. Eleine Mad är Madeleine Jacobsssons talesperson för dom vetenskapliga och paranormala upptäckter som uppstår i hennes världar. Hon beskriver innehåll, teknik och estetik utifrån ett kategoriseringssytem där konsten delas upp som olika typer av komponenter och därefter avkodas dessa allteftersom. För att förstå intuitionens inblandning i arbetsprocessen omförvandlas den till tre separata roller av en Sökare, Samlare och Myntare. Med rollerna försöker jag beskriva på vilka sätt som intuitionen är till gagn eller av förödelse för det konstnärliga arbetet. Sagan om M handlar om en grodlik karaktär, Delop, som lämnar sin hemplanet för att uppsöka andra världar. I sitt sökande hittar Delop ett folkslag vars syn och levnadssätt skiljer sig från hennes erfarenheter av “verkligheten” såsom hon lärt sig att överleva i den.Dr. Eleine Mad is Madeleine Jacobsson's spokesperson for the scientific and paranormal discoveries that arise in her worlds. She describes content, tecniques and aesthetics based on a categorization system where art is divided into different types of components and then decoded as they go. To understand the intuition's involvement in the work process, it is transformed into three separate roles by a Seeker, Collector and a Myntare(In swedish language the one who is a "myntare" -is verbally declaring a concept or term). With these roles I try to describe in what ways intuition is beneficial or devastating to the artistic work. The story of M is about a frog-like character, Delop, who leaves the home planet to seek out other worlds. In her search, Delop finds a world whose views and lifestyles differ from her experiences of "reality" as she learned to survive in it.
Recorded sound and image material of the presentation is available for private use.
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"Training the Code Team Leader as a Forcing Function to Improve Overall Team Performance During Simulated Code Blue Events." Doctoral diss., 2017. http://hdl.handle.net/2286/R.I.46236.
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abstract: The American Heart Association (AHA) estimates that there are approximately 200,000 in-hospital cardiac arrests (IHCA) annually with low rates of survival to discharge at about 22%. Training programs for cardiac arrest teams, also termed code teams, have been recommended by the Institute of Medicine (IOM) and in the AHA's consensus statement to help improve these dismal survival rates. Historically, training programs in the medical field are procedural in nature and done at the individual level, despite the fact that healthcare providers frequently work in teams. The rigidity of procedural training can cause habituation and lead to poor team performance if the situation does not match the original training circumstances. Despite the need for team training, factors such as logistics, time, personnel coordination, and financial constraints often hinder resuscitation team training. This research was a three-step process of: 1) development of a metric specific for the evaluation of code team performance, 2) development of a communication model that targeted communication and leadership during a code blue resuscitation, and 3) training and evaluation of the code team leader using the communication model. This research forms a basis to accomplish a broad vision of improving outcomes of IHCA events by applying conceptual and methodological strategies learned from collaborative and inter-disciplinary science of teams.Dissertation/Thesis
Doctoral Dissertation Human Systems Engineering 2017
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"Development and Use of an iPad-Based Resuscitation Code-Blue Sheet for Improving Resuscitation Outcomes during Intensive Patient Care." Master's thesis, 2015. http://hdl.handle.net/2286/R.I.35995.
Full textAbstract:
abstract: The American Heart Association recommended in 1997 the data elements that should be collected from resuscitations in hospitals. (15) Currently, data documentation from resuscitation events in hospitals, termed ‘code blue’ events, utilizes a paper form, which is institution-specific. Problems with data capture and transcription exists, due to the challenges of dynamic documentation of patient, event and outcome variables as the code blue event unfolds.
This thesis is based on the hypothesis that an electronic version of code blue real-time data capture would lead to improved resuscitation data transcription, and enable clinicians to address deficiencies in quality of care. The primary goal of this thesis is to create an iOS based application, primarily designed for iPads, for code blue events at the Mayo Clinic Hospital. The secondary goal is to build an open-source software development framework for converting paper-based hospital protocols into digital format.
The tool created in this study enabled data documentation to be completed electronically rather than on paper for resuscitation outcomes. The tool was evaluated for usability with twenty nurses, the end-users, at Mayo Clinic in Phoenix, Arizona. The results showed the preference of users for the iPad application. Furthermore, a qualitative survey showed the clinicians perceived the electronic version to be more accurate and efficient than paper-based documentation, both of which are essential for an emergency code blue resuscitation procedure.Dissertation/Thesis
Masters Thesis Computer Science 2015
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Pang-chiung, Liu, and 劉邦炅. "Morphological Identification of the Blue Cone Bipolar Cell in the Rabbit Retina." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/18212294071784081299.
Full textAbstract:
碩士國立清華大學
分子醫學研究所
93
Bipolar cells play major roles in visual signal transmission from photoreceptors to ganglion cells, and can be further subdivided into at least 13 distinct types based on their morphology and physiology. Particularly, identification of the blue cone bipolar cell is an important work in color vision research. Color pathway has been studied for a long time in the primate, but the circuit for color processing in other mammals is still obscure, especially in the bipolar cell level. In this study, I was aiming to morphologically identify blue cone bipolar cells in the rabbit retina. For efficiently finding the blue cone bipolar cells, I used microinjection to mark bipolar cells, peanut agglutinin to label all cone cells, and anti-S cone opsin antibody to label S cone outer segments in the whole mount rabbit retina. I then superimposed the images to verify the cone selectivity in different injected bipolar cells. From the results of my experiments, each narrow-field and mediate-field type bipolar cells were showed to have no cone selectivity. However, there is one type of wide-field bipolar cells with S cone selectivity identified in my study. This type of cells gives rise 4-5 branchless primary dendrites to specifically contact S cone pedicles. In addition, there were also two other types of wide-field bipolar cells identified in my study, which have no S cone selectivity. In conclusion, the color encoding bipolar cells in rabbit retina are different from the ones found in primate retina. Therefore, the color information processing pathway of non-primate retina may be different from primate retina.
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McKeefry, Declan J., I. J. Murray, and J. J. Kulikowski. "Red-green and blue-yellow mechanisms are matched in sensitivity for temporal and spatial modulation." 2001. http://hdl.handle.net/10454/3771.
Full textAbstract:
NoThe spatial and temporal properties of human colour vision are examined using isoluminant, red¿green and blue¿yellow tritanopic gratings. Chromatic sensitivity is found to be low-pass as a function of both spatial and temporal frequency along all the chromatic axes investigated, including the tritanopic confusion lines employed to examine the properties of the S-cone driven mechanism. Comparison of sensitivity to on-off and contrast reversing stimuli indicates that transient mechanisms contribute to the detection of red¿green patterns but that the detection of S-cone specific patterns is governed by sustained mechanisms. By compensating for transient contributions to red¿green sensitivity, it is shown that sensitivity of chromatic mechanisms dominated by L- and M-cone input are closely matched to those with S-cone input.
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Long, Chun-Ji, and 龍春吉. "Design and Applications of Novel 1,3,4-Oxadiazole Bent-Core Structures for Blue Phase Liquid Crystals." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/54252533117036790381.
Full textAbstract:
碩士國立交通大學
材料科學與工程學系
100
This thesis is based on our laboratory has published the results of literature on biaxial liquid crystal, as derived from the novel of blue phase liquid crystal molecular design and synthesis. The liquid crystal molecules designed to allow the laboratory published 1,3,4-oxadiazole as the core of the banana-shaped biaxial liquid crystal, and use the soft chain of different lengths to explore the liquid crystal phases. And then import a chirality of soft chain try to induce blue phase. Series one of molecules: OXD4f, OXD5f, OXD7f, OXD7f*. Then one side of the hard segment to change the number of benzene rings, but its structure is still asymmetry.Adding two functional groups fluorine and a chiral soft chain, as the basis of two functional groups to make control groups to compare their properties and try to induce blue phase. Series two of molecules: OXD5B7, OXD5B7F, OXD5B7*. Finally, we successfully synthesized a molecule which have BPIII property in the series one ,and also useed a blended method successfully induce blue phase, which blue phase temperature range from 39℃ room temperature. In the series of two, we successfully designed a single molecule which have BPIII property.Because the BPIII temperature range is too narrow,we can only be observed its texture in the POM,the range only about 0.5℃.We used the POM, DSC, UV-Visible, measurement of photoelectrical properties and XRD to verify the physical properties of these liquid crystals.
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Chang, Huang-Hsieh, and 張皇賢. "Study of Blue Phase LC Materials Containing Bent-Core Biaxial Nematic Hosts and Chiral Dopants." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/63946819039681989292.
Full textAbstract:
碩士國立交通大學
平面顯示技術碩士學位學程
100
The liquid crystals synthesized which showed blue phase were mixed with compounds with similar structure and displayed nematic phase in order to stable mesophases, extend temperature ranges of liquid crystal (LC) range, increase the luminescence (L) and contrast ratio (CR) of our LC in in-plane switching cells. In our class A, BP was extend to 39 oC, as well, the L and CR were improved. The response times were all in millisecond class. However, the L was not saturated, and this issue needed to be resolved by synthesizing LC with functional groups with stronger dipole. For this purpose, class B containing fluorine and a chiral soft chain (OXD5B7*) and with blue phase about 0.2 oC were studied. The mixture of OXD5B7* and its derivatives displayed BPIII about 1.5 oC and O-E properties can not be done. In the future, class A will be modified by replacing functional (OMe→CN) to induce stronger dipole and with BP range in room temperature, furthermore, by mixture process, the L and CR could be further improved.
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Weng, Wei-Ting, and 翁瑋廷. "Synthesis and Applications of Chlorine-Substituted Bent-Core Structures for Double- component Blue Phase Liquid Crystals." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/32027662653141989207.
Full textAbstract:
碩士國立交通大學
照明與能源光電研究所
100
This paper synthesized a series of chlorine-substituted bent-core molecules, the first series are uni- and di- Chlorine-Substituted Bent-Core Structures 。Alkyl chain are 7 carbon,9 carbon,10 carbon。We discuss the effects of different carbon numbers for blue-phase relationship. And were named C7ClC7, C7Cl2C7, C9ClC9, C9Cl2C9, C10ClC10. Structure compared to series one, series two structures on the side of the hard segment by adding fluorine functional groups, and the soft segment in the carbon chain to add a chiral center, and named C7ClFC7, C7ClFC7 *, C7Cl2FC7, C7Cl2FC7 *. In this study, blended series of one way the compounds C7ClC7, C7Cl2C7, C9ClC9, C9Cl2C9, C10ClC10 with laboratory developed chiral dopant ISO-F, ISO-F *, blended results can be found by the C9ClC9 and ISO-F * the system blends the blue phase liquid crystal induced by the nature of the best, wide-temperature blue phase up to 10 degrees. Series two, although we import fluorinated chiral center and lateral functional groups, but not smooth out the blue phase liquid crystal induced by the nature. These bent-core molecules, we use the DSC, POM, UV-Visible, NMR, EA, MASS analysis to verify its physical and chemical properties
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Chou, Yu-Chiang, and 周予強. "Synthesis and Study of Blue Phase Liquid Crystalline Mixtures Consisting of H-Bonded Bent-Core Diads." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/22898214472535945594.
Full textAbstract:
碩士國立交通大學
影像與生醫光電研究所
100
We synthesized a series of pyridine-based molecules and carboxylic acid molecules. The chemical structures of these compounds were characterized by H1-NMR and EA. They consisted of hydrogen bonding supramolecular diad mixtures. The liquid crystalline phases and mesomorphic behavior of all compounds were identified from the results of POM and Electro-optical measurement. Pyridyl molecules connected to a simple carboxylic acid molecule by a hydrogen bond have a nematic phase. The F functional group in carboxylic acid-based molecules affects their supramolecular liquid crystal temperature range. As the carboxylic acid molecules have chiral structure, the nematic phase switches to the chiral nematic phase. Next, we mixed pyridine-based molecules with carboxylic acid molecules with chiral structures and F functional groups in different molar percentage blends. In the case of excess carboxylic acid molecules, the carboxylic acid molecules will form a rod-like structure with another via a hydrogen bond. This series of C9IIIPy-A2F * and C7IIIPy-A2F * have blue phase (BPI /II). The series of C9IIIPy-A2F * have blue phase when carboxylic acid molecules are 60 mol% to 80 mol%. The blue phase temperature range is about 8℃. The series of C7IIIPy-A2F * also have blue phase when carboxylic acid molecules are 60 mol% to 70 mol%. The blue phase temperature range is about 7℃.
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Chiang, I.-Hung, and 江奕宏. "Study of Bent-Core Molecules toward Blue Phase Liquid Crystals and Hydrogen-Bonded Liquid Crystalline Nanocomposites." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/34614091910434715311.
Full textAbstract:
博士國立交通大學
材料科學與工程學系所
103
Bent-core molecules were of achiral bent-core structures and known as specific mesophasic behaviors, molecular biaxiality, spontaneous polarity, and supramolecular chirality. These special structural and electro-optical properties might lead to a lot of applications. Therefore, four hydrogen-bonded (H-bonded) bent-core complexes S1, P1, C4, and P8 with string-, ring-, and cage-like siloxane termini were synthesized and investigated in chapter 2 to reveal the shape and confinement effects of the terminal siloxane groups on the self-assembled behavior of molecular arrangements. In addition, as illustrated in chapter 3, ferroelectric and anti-ferroelectric mesophases were induced via hybrid (C60-based/Si-based) H-bonded bent core LCs, where the complexes (FIAx and FIIAx) are synthesized and reported for the first time. Not only the Ps values were increased, but also the transition temperatures and ranges of the SmCP phases could be reduced and extended respectively in contrasted to the Si-based H-bonded bent core LCs. Compared with reported Au-based/Si-based H-bonded bent core LCs, much higher contents of surface-modified C60 could be miscible in binary LC complexes indicating an effective hybrid method. Finally, in chapter 4, 1,3,4-oxadiazole–based bent core LCs inducing the broad ranged single-component BPIII phase (with ranges of 34 and 7 K for OXD7* and OXD5B7F*, respectively) were synthesized. It is found that HTPs (measured) and molecular biaxialities (calculated) were crucial for BPIII of bent core molecules.
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Chien, Shin-Chieh, and 簡士傑. "Synthesis and Applications of Novel Bent-Core Structures for Single- and Double- component Blue Phase Liquid Crystals." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/27607773354684642509.
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碩士國立交通大學
材料科學與工程學系
100
In this thesis, we synthesized the banana-shaped liquid crystals with amorphous blue phase and investigated their properties. The banana‐shaped liquid crystals (LC) are based on chiral bent-core molecules containing Nitrile group and C5C7* moieties. The functional fluorine groups are incorporated into the main-chained segments, mainly in order to get low-temperature and high-polarity properties of the banana-shaped molecules, named C3FC7*, C5FC7*. Moreover, a series of molecules with chiral center bearing different alkyl chains (3 and 5 carbons, respectively) was compared to discuss the relationships between different carbon numbers and blue-phase properties. In addition, we also have synthesized a non-chiral center of the banana-shaped molecules, named C3FC7, C5FC7. Finally, we use those blended liquid crystal to obtain blue phase, and to increase range of the blue-phase temperature. Banana-shaped molecule C5FC7* has blue phase with temperature range to 3 °C, and also is blended C5FC7 and ISO-F to improve the range of amorphous blue-phase temperature to 15 °C. We used the DSC, FT-IR, POM, UV-Visible and X-ray measurement to verify the physical properties of those liquid crystals.
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Chen, Yu-Shou, and 陳昱碩. "Photocatalytic Destruction of Methylene Blue on Au@TiO2 or Ag@TiO2: Effect of Core Size and Shell Thickness." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/36937556709012361790.
Full textAbstract:
碩士國立中央大學
化學工程與材料工程研究所
99
The purpose of this study was to develop a catalyst with high photocatalytic activity and had core/shell structure. It could be applied to the decomposition of organic pollutants under UV light illumination. The literature shows that doping precious metal on the surface of titanium dioxide can enhance the photocatalytic activity because noble metal can form active sites to promote the electronic charge transfer in the interface of metal and titanium dioxide. Although the activity of this kind of structure is high, the exposed metal is easy to dissolve or corrosive, leading to catalyst decay. Core/shell structure can be used to overcome this shortcoming, noble metals located in the core, while titanium dioxide is in the shell. In this study, Au@TiO2 and Ag@TiO2 catalysts with core/shell structure were synthesized by sol-gel method with hydrothermal treatment. Different preparation parameters lead to different sizes of metal core, different crystal size of TiO2 and different crystallinity of TiO2. These catalysts were characterized by UV-vis spectroscopy (UV-vis), Dynamic light scattering analyzer (DLS), inductively-coupled plasma-mass spectrometry (ICP-MS), X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS). TEM micrographs, UV-vis spectra and DLS results showed the Au core size of Au@TiO2 could effectively be controlled between 6.6 and 32.37 nm by different CTAB concentration. However, the Ag core size of Ag@TiO2 could just be controlled between 6.82 and 15.35 nm by different ratio of hydrazine to silver nitrate. XRD patterns exhibited the crystallinity of TiO2 increased with increasing the temperature of hydrothermal process. The photoreaction was carried out in a 10 ppm methylene blue solution with two 8w 254 nm UV light as the light source. The concentration of MB in the degradation samples were measured by UV-vis spectrometer (UV-vis). The effect of various metal core sizes, various noble metals loading amount and the hydrothermal temperature were investigated. The results showed the small metal core size had slightly higher activity than the larger ones, and the optimal amounts of Au and Ag loading were 1wt. % and 0.5 wt. %, respectively. Furthermore, the sample with the highest hydrothermal temperature had the highest activity due to the highest crystallinity. From these results, the photocatalytic activity of Metal@TiO2 catalyst mainly depended on the crystallinity of TiO2, the amount of noble metal loading and the kinds of cocatalyst rather than the size of noble metal core.
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Chen, I.-li, and 陳怡利. "The phohtocatalytic activity of Ag/TiO2 photocatalyst with core shell and metal doping structure toward methylene blue decomposition." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/26556729424775906602.
Full textAbstract:
碩士國立中央大學
化學工程與材料工程研究所
98
The purpose of this study was to develop a catalyst with high photocatalytic activity and had core/shell structures. It could be applied to the decomposition of organic pollutants under UV light irradiation. The literature shows that the use of precious metals such as gold or silver modified titanium dioxide photocatalyst has been widely studied. Noble metals such as gold, platinum and palladium are too expensive to be used in industrial application. In order to find an efficient way to improve the quantum efficiency of photocatalyst, silver was chosen to modify titanium dioxide in this study. The noble metal deposition on the surface of titanium dioxide can increase the photocatalytic activity since the metal can form active sites to promote the electronic charge transfer in the interface of metal and TiO2. Although the activity of this kind of structure is high, the exposed metal is easy to dissolve or corrosive, therefore the catalyst cannot use for a long time. Core/shell structure can be used to overcome this shortcoming, the noble metals located in the core, while the semiconductor oxide such as titanium dioxide is in the shell. This thesis is divided into two parts, the first part is on the preparation of Ag/TiO2 with core/shell structure and its activity. The precursors were the silver nitrate, hydrazine, cetyltrimethylammonium bromide and titanium tetraisopropoxide (TTIP). The amount of silver in the inner core was determined by inductively coupled plasma-mass spectrometry (ICP-MS) and X-ray photoelectron spectroscopy (XPS). Nano-silver particle size was about 5-10nm, the shell thickness of titanium dioxide was about 10-20nm. The photoreaction was carried out in a 10 ppm methylene blue solution with two 1.5 W 254 nm UV light as the light source. The concentration of MB in the degradation samples were measured by UV-visible spectrometer (UV-vis). The results showed that Ag/TiO2 after hydrothermal treatment had higher photocatalytic activity than the one without treated by hydrothermal method. Which was mainly due to treatment by hydrothermal would increase the crystallinity of TiO2. The high crystallinity of titanium dioxide can increase the quantum efficiency of photons into the nucleus. In the chemical deposition method, the precursors were Evonik Degussa P-25 titanium dioxide, cetyltrimethyl ammonium bromide, sodium borohydride, and silver nitrate. The silver loading was determined by inductively coupled plasma-mass spectrometry meter (ICP-MS). The results show that almost all of the silver precursor could load on the support. The silver particle size was about 5-10 nm. The reaction was carried out in a 10 ppm methylene blue solution with two 1.5 W 254 nm wave length UV light as the light source. The concentration of methylene blue in the degradation samples was measured by UV-visible spectrometer (UV-vis). The results showed that the 1 wt.% Ag/TiO2 had the highest photodegradation activity. It shows that the silver loading was not the only reason to influence the photoactivity. Too much silver loading would block access the surface of titanium dioxide and decreased quantum efficiency of photoreaction. The photocatalytic activity was not proportional to silver loading. The activity of silver/TiO2 photocatalyst was compared with Ag@/TiO2 with core-shell structure. Ag/TiO2 had a higher activity in the initial reaction period. It was possible because the silver deposited on TiO2 could effectively capture the photons. After a long time reaction, the surface of the metal may corrode or dissolve, and the core-shell Ag@TiO2 photocatalyst can effectively avoid this problem. Silver nanoparticles increase the actives sites and make electrons easily act with the adsorbed substances such as O2 and OH– to form O2– and OH radicals. These highly active substances reacted with methylene blue molecules and formed small molecules such as carbon dioxide and water molecules.
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楊李涵. "Synthesis and Study of Blue Phase Liquid Crystalline Mixtures Consisting of Rod-Like and H-Bonded Bent-Core Dimers." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/69585897539158074469.
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Chen, Wei-Cheng, and 陳威誠. "Effect of Varying the Alkyl Chain Lengths and Core Structures of Liquid Crystal Molecules on the Formation of Blue Phases." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/t9rx4r.
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碩士大同大學
化學工程學系(所)
99
The primary research work of this study is an attempt to correlate the structure-property relationship of the formation of blue phases in chiral liquid crystals in terms of variation of the achiral alkyl chain length (m), chiral alkyl chain length (n), structure of the rigid core, and achiral alkyl chain length (m) without ether linkage in the chiral liquid crystal materials. Thus, the optically active alcohols, 1-ethyloxy-2-propanol, 1-propyloxy-2-propanol, 1-butyloxy-2-propanol, 1-pentyloxy-2-propanol, 1-hexyloxy-2-propanol, were designed and synthesized by reacting (S)-propylene oxide with alkyl alcohols under basic condition. In consequence, three novel homologous series of chiral materials, (R)-6-(1-alkyloxy-2-propyl)naphth-2-yl 4-alkyloxybenzoate, I(m=6-9, n=1-2), (R)-4-(1-alkyloxy-2-propyl)biphenyl 4-alkyloxybenzoate, II(m=6-9, n=1, 4, 5), (R)-4-(1-alkyloxy-2-propyl)biphenyl 4-heptylbenzoate, III(n=1-4), derived from these alcohols were synthesized for the investigation of the effect of the achiral alkyl chain length (m), ether linking group, chiral tail alkyl chain length (n) and rigid core structures on the mesomorphic. The mesomorphic phases and their corresponding transition temperatures were primarily characterized by the microscopic textures and DSC thermograms. The results of compounds I(m, n) composed of the rigid core structure of PhCOONa and chiral group of optical activity 1-ethyloxy-2-propanol and 1-propyloxy-2-propanol, showed that compound I(m=6-9, n=1) and I(m=6, 8, 9, n=2) exhibits the mesophases sequence of N*-Cr., and the compound I(m=7, n=2) exhibits the mesophases sequence of BPII-N*-Cr.. With the exception of I(m=7, n=2) that exists the widest temperature range of enantiotropic BPII phase. The results of compounds II(m=6-9, n=1, 4, 5) composed of the same chiral group but differed in the rigid core structure (PhCOOPhPh) as compounds I(m, n). The compound II(m=8, n=2) exhibits the mesophases sequence of SmA*-Cr., the compound II(m=7, n=5) exhibits the mesophases sequence of BPI-N*-SmA*-Cr., the compound II(m=6-9, n=4) and I(m=8, n=5) exhibits the mesophases sequence of BPII-BPI-N*-SmA*-Cr., The widest temperature range of BP phases for these compounds appeared at II(m=9, n=4). The results of compound III(n=1-4), the composed of the same rigid core structure as compound II(m, n) but differed in the achiral group where a reducible ether linkage is introduced, the compounds III(n=1) exhibit the mesophases sequence of SmA*-Cr., the compounds III(n=2) exhibit the mesophases sequence of BPI-N*-Cr., the compounds III(n=3-4) exhibit the mesophases sequence of BPII-BPI-N*-Cr.. In general, the results of mesomorphic phases show that compounds with the short alkyl lengths (n=1-2) at chiral groups generally suppress the formation of BP phase, however, compounds with longer length (n=3-5) enhance the thermal stability of BP phase. The results also show that, when the rigid core structures of the molecules change from PhCOONa to PhCOOPhPh, the clear point is increased and the stability of blue phase is also increased. Moreover, when extending the alkyl length (m) of achiral tail, the clear point is increased but the thermal stability of blue phase display no significant difference. Compounds having achiral group without ether linkage between the core display lower clear point, and lower the thermal stability of blue phase as compared to the compounds having ether linkage between the core and achiral alkyl chain. Among these three series of chiral compounds, compound II(m=9, n=4) has the widest BP phase temperature range (cal. 3.9℃), where BPI and BPII formed.
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Wu, Sz-Shian, and 吳思賢. "The Effect of Core Structure and Chiral Group of the Liquid Crystals and Binary Mixture on the Formation of Blue Phases." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/87846029799046287032.
Full textAbstract:
碩士大同大學
化學工程學系(所)
100
A few of liquid crystal materials exhibiting blue phases have been reported in a single compound, moreover, the blue phases in the materials possess a very small temperature range (cal.1-2℃), mainly because of the blue phases are frustration phases. Thus, in order to find more of blue phase liquid crystal materials and shed light on the relationship between molecule structure and the formation of blue phases, in this work, the optically active alcohols, (S, S)-1-(2-methylbutyloxy)-2-propanol and (R, S)-1-(2-methylbutyloxy)-2-propanol were designed and synthesized by reacting (R)-propylene oxide or (S)-propylene oxide with (S)-2-methyl-1-butanol under basic condition as the chiral moieties for synthesizing chiral liquid crystal materials. The other optically active alcohols, 2-alkylalkyl (S)-2-hydroxypropanoate were designed and synthesized by the reaction of (L)-lactic acid with alcohols. Consequently, six homologous series of chiral compounds, (R, S)-6-[1-methyl-2-(2-methylbutoxy)ethoxy]-2-naphthyl 4-(alkyloxy)benzoate, I-RS(m=6-10), and (S, S)-6-[1-methyl-2-(2-methylbutoxy)ethoxy]-2-naphthyl 4-(alkyloxy)benzoate, II-SS(m=6-10), and 2-alkylalkyl (R)-2-[4-(4’-alkoxyphenylcarbonyloxy)biphenyloxy]propionates, III(m=6-9, n=2, p=1), IV(m=6-9, n=2, p=2), V(m=6-9, n=3, p=3) and VI(m=6-9, n=4, p=2), were prepared for the study. The results of the works are divided into two part for discussion, and the results for discussions are in term of the effect of (i) achiral terminal alkyl chain length (m) of the materials, (ii) chiral terminal alkyl chain length (n) and (p) of the materials, on the generation of blue phase liquid crystals. `II Six series of the materials for the study with the general formulas are depicted below. The first part of materials is depicted as follow I-RS(m=6-10) II-SS(m=6-10) The second part of materials is depicted as follow III (m, n, p; m=6-9, n=2, p=1) IV (m, n, p; m=6-9, n=2, p=2) V (m, n, p; m=6-9, n=3, p=3) VI (m, n, p; m=6-9, n=4, p=2) The third part of the works is to investigate whether the binary mixture of the blue phase materials could enhance the thermal stability of the blue phase. Thus, binary mixtures (I) with the weight percentage ratios of 100/0, 80/20, 65/35, 50/50, 35/65, 20/80, 0/100 of the compounds were prepared for the investigation. The corresponding molecular structures of the target compounds are depicted below: `III I-RS(m=8) II-SS(m=8) The results from the study of these six series of chiral compounds show that, depending on the molecular structure, various mesomorphic phases: BP, N*, TGBA*, SmA* and SmC* phases can be found. The appearance of frustrated phases (BP and TGB* phase) indicate that most of these compounds possess high chirality. The results from the study of two diastereomers; I-RS(m=6-10) and II-SS(m=6-10) on the formation of blue phase shows that the formation of blue phases have no obvious correction to the isomers. As extending alkyl lengths (n, p) at the chiral tail of the compounds, the stability of BP phases increases. In addition, when the lengths of “n” and “p” are in the same number resemble to the swallow-tail like, the compounds has the wider temperature range of BP phase. In the study of the binary mixture of diastereomers, surprisingly, it is found that mixing of diastereomers results in the disappearance of blue phase. This result may be due to that one of helix in the double helix of the blue phase in diastereomers is in the opposite sense with nearly the same pitch, such that diminishes one of the helix in the mixtures and remains other helix that exhibiting chiral nemetic phase. In conclusion, our results show that the change of achiral alkyl chain length ‘m’ has no correlation to the temperature range of blue phase. Chiral tails length (n=p) along with `IV the increase of n and p, which is resemble to the swallow-tail like, has wider temperature range of blue phase. Among all compounds, compound V (m, n, p; m=8, n=3, p=3) has the widest temperature range of enantiotropic blue phases (cal. 13.9℃).
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Huang, Chu-Cheng, and 黃居正. "A Study on Relationships among Core Competences, Blue Ocean Strategy and School Effectiveness in Innovative Leadership of Principals of Senior High Schools." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/bhj7te.
Full textAbstract:
博士國立臺北教育大學
教育經營與管理學系
106
Abstract The purposes of this study are to understand the current situation, differences, and relationships of the “core competence”, the” blue ocean strategy”, and the “school effectiveness” of innovative leadership of high school principals in Taipei City and New Taipei City. Then, it provides the conclusions and recommendations for the reference of educational administrations, high school principals, and future research. It adopts the questionnaire survey method, and the samples including 720 teachers from 26 schools (including the part of the junior high school) in the 17 schools in New Taipei City and 9 in Taipei City 615 teachers send back their copies and the recovery rate is 85.4. %. It includes 450 valid questionnaires and the effective rate is 73.2%. Data is analyzed using SPSS and AMOS statistical software. According to the results of this study, the following findings are summarized: 1. Teachers perceive principals' “core competence”, “blue ocean strategy”, and “school effectiveness” of innovative leadership are at medium to high level. 2. As for the teachers perceive the principals' “core competence”, “blue ocean strategy”, and “school effectiveness” of innovative leadership, there is significant difference between the groups of the age above 51 year-old and the younger groups. The overall performance is higher in group of the age above 51 year-old, but there is no difference in teaching effectiveness. 3. Teachers with the seniority of "21 years or more" are more perceptive about the principals’ core competence, diversification strategy, administrative performance, and student learning performance of innovative leadership. 4. Teachers with director are more perceptive of the principals' overall core compeence, blue ocean strategy, school effectiveness, administrative performance of innovative leadership, parental participation effectiveness than mentor or full-time teachers. However, there is no difference in teacher teaching effectiveness and student learning performance. Teachers with director or other teachers have higher perceptions of governance and value strategies than teacher mentors. Teachers with director have higher perceptions of the differentiation strategy and the diversification strategy than teacher mentors. 5. The junior high school teachers have higher perceptions of the principals’ diversi- fication strategy of innovative leadership than the senior high school teachers. 6. Principals’ overall core competence, the degree of orientation, value strategy and parental participation of innovate leadership, teachers in the school with "41-60 classes" or "81 classes or above" have higher perceptions than their counterparts in the school with "61-80 classes". Principals’ overall blue ocean strategy, differen- tiation strategy, overall school effectiveness, administrative performance, teacher’s teaching effectiveness and student’s learning effectiveness of innovation leadership, teachers in the school with "41-60 classes" performance better than their counterparts in the school with "61-80 classes".Teachers in the school with "41 classes below" are more perceptive about the principles’ innovate leadership than the teachers in the school with "61-80 classes." 7. Teachers in Taipei City are more perceptive about principals' core competence, blue ocean strategy, and school effectiveness of innovative leadership than teachers in New Taipei City, but there is no difference in the teacher’s teaching effectiveness. 8. There are moderate positive correlations among the principals’ innovative leadership at core competence, and school effectiveness. 9. There are high positive correlations between principals’ blue ocean strategy and school effectiveness of innovative leadership. 10. There is a good fitness of the overall model, which includes principals' innovative leadership core competence, blue ocean strategy and school effectiveness. 11. Principal's core competence of innovative leadership can enhance school effectiveness through the implementation of the blue ocean strategy, the principals’ core competence of innovative leadership is not a key factor in school effectiveness, and the implementation of the blue ocean strategy has full or partial mediation. Finally, based on the conclusions in this research, it proposes some recommen- dations for educational administrations, high school principals, and future research. Keywords: high school principals, innovative leadership, core competences, blue ocean strategy, school effectiveness
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Lee, Chi-Hung, and 李其紘. "Neutron scattering investigation of complex magnetic transitions in multiferroic Co3TeO6 and core@shell Prussian blue analogue Rb-Co-Fe@K-Ni-Cr nano-cubes." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/78647108134040562226.
Full textAbstract:
博士國立中央大學
物理學系
103
There are two parts in my thesis. The first part focuses on the complex magnetic couplings in Co3TeO6. The second part focuses on the magnetic phases in core/shell Prussian blue analogue Rb-Co-Fe@K-Ni-Cr nano-cubes. In the first part, neutron diffraction, magnetic susceptibility, specific heat, and dielectric constant of single crystal cobalt tellurate Co3TeO6 have all been measured to study the interplay between the ferroelectricity, commensurate and incommensurate magnetic ordering developed in the compound. Four critical temperatures are identified. A non-collinear arrangement of the Co spins is found. A negative thermal expansion of the crystalline unit cell is identified when electric polarization develops. Both applied magnetic field and electric field significantly affect the magnetic and electric order parameters as well. These behaviors characterize Co3TeO6 to be a type-II multiferroics. Four magnetic phases have been identified in nano-sized core/shell Prussian blue analogue cubes, with a 250 nm Rb-Co-Fe phase in the core coated by a 45 nm K-Ni-Cr phase on the shell. The stress preserved in the core results in separated CoN6 and FeC6 octahedra, which weaken the magnetism and photo-sensitivity of the core. Three separated magnetic phase transitions at 86, 69 and 67 K are found in the K-Ni-Cr phase on the shell. Two magnetic exchange paths are identified. One propagates along the three crystallographic axis directions. The other propagates along the [110] crystallographic direction for the Ni-Ni ions, but not for the Cr-Cr ions. The severe Cr-deficiency and the appearance of direct Ni-Ni exchange are used to understand the appearance of multiple magnetic phases. The formation of compact CoN6 and FeC6 octahedra weakens the charge transfer between the Fe and Co ions, which results in the development of weak magnetic moments in the core.
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Silva, Bruno Henrique Batista Cruz da. "O turismo inteligente: validação e análise da deslocação de turistas." Master's thesis, 2019. http://hdl.handle.net/10451/41665.
Full textAbstract:
Trabalho de projecto de mestrado, Engenharia Informática (Engenharia de Software) Universidade de Lisboa, Faculdade de Ciências, 2019No âmbito da tese de Mestrado em Engenharia Informática, foi escrito este relatório final para descrever os principais objetivos do projeto, as tarefas que foram realizadas, o plano de trabalhos que foi cumprido, assim como, uma análise às tarefas que ficaram por cumprir, às limitações encontradas e ao trabalho futuro. Com o crescimento contínuo do turismo, a indústria do turismo procura formas para que o movimento dos turistas numa cidade não fique dependente de atrasos nos transportes, isto para ajudar os turistas a manterem-se em movimento e aumentarem a sua satisfação, sendo esta a principal motivação deste trabalho. O movimento de turistas numa cidade segue padrões determinados pelos pontos de interesse a visitar, ao contrário dos habitantes cujas deslocações são essencialmente determinadas pelo local de trabalho e de residência. Por esta razão, o movimento dos turistas é mais variável e é importante perceber estas alterações em tempo útil. Para cumprir o que se propõe, neste trabalho pretende-se desenvolver um conjunto de otimizações e novas funcionalidades, a integrar numa aplicação móvel responsável pela venda de reservas para transportes turísticos. As reservas passarão a ser validadas com auxílio da tecnologia QR Code, que oferecerá uma maior eficiência e controlo na validação das mesmas. Para além disto será desenvolvida uma aplicação destinada aos turistas, que tira partido da tecnologia GPS e BLE e torna, assim, a utilização dos transportes turísticos mais satisfatória. Com base em inputs operacionais, nomeadamente a localização das vendas das reservas e a localização dos turistas na proximidade das paragens, iremos oferecer uma camada que tenha uma visão global da presença/procura de turistas numa cidade, recorrendo a business intelligence (BI) e multi-sensing.
In the scope of the Master thesis in Informatics Engineering, this final report was written to describe the main objectives of the project, the tasks that were carried out, the work plan that was accomplished, as well as an analysis of the tasks that remained unfulfilled, the limitations encountered and future work. As tourism continues to grow, the tourism industry is looking for ways in which the movement of tourists in a city is not affected by transport delays. The main motivation of this work is to help tourists keep moving and to increase their satisfaction. The movement of tourists in a city follows patterns determined by the points of interest to visit, unlike the inhabitants whose journeys are essentially determined by the place of work and residence. For that reason, the movement of tourists is more variable, and it is important to realize these changes in a timely manner. To fulfil what is proposed, this work intends to develop a set of optimizations and new features, to be integrated in a mobile application responsible for the sale of reservations for tourist transport. Reservations are now validated using the QR Code technology, which offers greater efficiency and control in their validation. In addition, an application for tourists takes advantage of GPS and BLE to ensure movement of tourists is done smoothly and, thus, making tourist transport more satisfying. Based on operational inputs, specifically the location of reservation sales and the presence of tourists near the stops, we offer a layer that has an overall view of tourist presence/demand in a city, using business intelligence and multi-sensing.