Ce travail de thèse de doctorat vise à l’élaboration de surfaces poreuses hiérarchiquement structurées à partir de copolymères aux structures bien définies ainsi qu’à l’étude de leurs propriétés. La chimie des polymères, en constante évolution, a permis dans ce travail de thèse la synthèse de copolymères diblocs de natures diverses par des techniques de polymérisation radicalaire contrôlée tout aussi variées. En effet, la polymérisation radicalaire contrôlée par les nitroxydes (NMP), par transfert d’atome (ATRP), par transfert réversible d’addition/fragmentation (RAFT) et par le Cu(0) ont été utilisées pour la synthèse de copolymères diblocs associant un bloc de poly(styrène) à divers blocs d’acrylates ou de 4-vinylpyridine. Intimement associée à un procédé d’élaboration basé sur l’évaporation de solvant, nommé figure de souffle (trad. Breath Figure), la synthèse de ces copolymères a permis l’élaboration de surfaces poreuses hiérarchiquement structurées aux échelles du micro et nanomètre. Les différentes phases ont conféré à ces matériaux des propriétés particulières d’adhésion, de mouillabilité ou encore de bioactivité. Ces recherches doctorales ont bénéficié de la double compétence du laboratoire en chimie et en physico-chimie des polymères. En effet, des techniques de microscopie (optique, à force atomique ou électronique), de diffusion de rayonnement (neutrons et rayon-X aux petits angles) ainsi que des tests de pégosité et de mouillabilité ont permis l’étude de la structuration des films ainsi que l’étude de leurs propriétés de surface. / The present studies aim at designing hierarchically structured porous surface from copolymers with well defined structures. As a science in constant evolution, polymer chemistry, enable the synthesis of diblock copolymers with different natures by the mean of various radical controlled polymerization techniques. Indeed, radical controlled polymerization with nitroxyde (NMP), by atom transfer (ATRP), by reversible addition/fragmentation transfer (RAFT) or by Cu(0) were used for the synthesis of diblock copolymers based on polystyrene and different acrylates or 4-vinylpyridine blocks. The intimately association between a fast solvent evaporation process named the Breath Figure and the synthesis of the copolymers enable the production of hierarchically structured materials from micro to nanoscale. The nature of the different blocks confers adhesion, wettability or bioactivity properties to these materials. These researches benefit from the chemistry and physico-chemistry laboratory competences. Indeed, microscopy techniques (optical, atomic force and electronic), scattering (small angle neutron or X-ray) as well as tack or wettability measurements enable the complete characterization of films structuration and point up their properties.

Darbe sinchroniškai tiriama kalbėjimo veiksmažodžių semantinė ir formalioji struktūra, skiriamas dėmesys lietuvių grožinių kūrinių dialoginei kalbai ir ją įforminančioms kalbėjimo leksemoms. Kadangi šiame darbe lietuvių kalbos kalbėjimo veiksmažodžiai nagrinėjami semantiniu aspektu, todėl iš pradžių aptariamos pagrindinės leksinės semantikos sąvokos, apibūdinama kalbėjimo veiksmažodžių semantinė grupė (KSG). Lingvistinėje literatūroje žodžio reikšmės ir jos raiškos formos vienovė vadinama semema. Į kalbėjimo veiksmažodžių semantinę grupę buvo atrinktos leksemos su sememomis „bendrauti žodžiais“, „perduoti informaciją, mintis, jausmus ir pan.,“ kurios įvardija kalbėjimo procesą. Sememos jungtos į KSG pagal jų komponentinės struktūros panašumą. Savo ruožtu sememos struktūra sudaryta iš minimalių semantikos vienetų – semų, kurios smulkiau nebeskaidomos. Kalbėjimo veiksmažodžių reikšmių analizė pagrįsta jų skaidymu į mažesnius reikšminius elementus, todėl tyrimui taikoma komponentinė analizė. Kalbėjimo veiksmažodžių formaliosios struktūros analizė, t. y. derivacinių santykių tinklas, pirminių kalbėjimo veiksmažodžių šaknų fonologinė sudėtis, charakterizuoja tam tikros sistemos struktūros požymius. Šiame darbe nagrinėjama pirminių kalbėjimo veiksmažodžių šaknies struktūra, vokalizmo ir konsonantizmo padėties ypatumai, nustatomi būdingiausi šios semantinės grupės šaknų struktūriniai modeliai. Bazinių ir priklausomųjų morfemų skyrimas leidžia jungti žodžius į sistemines grupes... [toliau žr. visą tekstą] / The subject of the semantic and formal structure of the speaking verbs as well as dialogical speech of some pieces of Lithuanian fiction and, also, lexemes formed in it. As Lithuanian speaking verbs are analysed there in the semantic aspect, so in the beginning of the work the subject of the investigation is the meaning of the main semantic groups. Besides, the semantic group of the speaking verbs (KSG) is researched. In the linguistic literature the meanings of the word and the unity of its expressiveness is called the semema. The lexemes with the sememas “to communicate orally”, “to transmit information, thoughts, emotions and etc.” were chosen to the semantic group of the speaking verbs. They describe the process of speaking. The sememas are included in KSG according to the principle of the similarity of their complex structure. The structure of the semema itself is built of the smallest semantic units called semes. However, there are good reasons to say that the analysis of the meanings of the speaking verbs proves that they are divided into the smaller elements. That is why the work presents the complex analysis of these verbs. The analysis of the formal structure of the speaking verbs, i.e. the net of the derivation relationship, the structure of the basic phonemic speaking verbs’ branches, is characterized by the certain signs of the structure. The work investigates the structure of the basic speaking verbs’ roots, as well as the peculiarities of consonant and vowel... [to full text]

本研究主要討論認知框架(Frame)的存在可藉由語體變異現象驗證，框架的概念可藉由說話者語體的轉換辨識，與語體變異現象相關並可驗證認知框架的語言策略和功能性策略皆被討論。本篇將歸納出語言策略與功能性策略的對應關係，並藉由語體變異現象驗證框架的結構是具階層性的。 本研究以語料庫為本，文內所分析的七筆語料皆來自政大國語口語語料庫，七筆語料皆是面對面、包含兩位參與者的對話，分析的過程以說話輪替(Turn)為計量單位，進而討論語體變異的目標。語料分類條件主要為語言形式策略(包含詞彙及句構)和功能性策略(包含言談結構、言說行動、語用合作原則)。 研究結果顯示(一)框架的概念可藉由語體變異現象驗證。語言形式策略包含詞彙的語意密度、正式性、詞頻，以及句型的複雜性、完整性、特定句型模式(Sentences patterns)等；(二)在敘述架構(Narrative Structure)中，語體變異現象主要用來標示闡述(Elaboration)，其次是評價(Evaluation)部分；在對話結構(Conversational Structure) 中，語體變異現象則主要用來標示話題延續(Topic Continuity)(三)語體變異現象主要可用來辨識言說行動中的斷言行為(Assertive)，其次為表述行為(Expressives)和指示行為(Directives)；(四)語體變異現象可用來辨識語用合作原則中的量的準則和方式準則；(五)語體變異現象驗證框架具有階層性的概念，包含主要三大階層—Denotative level、Metalinguistic level、和Metacommunicative level。 / The aim of this study is to investigate how frame can be manifested through stylistic variation. Linguistic devices and functional strategies which related to stylistic variation for the manifestation of frame are discussed; the distributions between linguistic devices and functional strategies of stylistic variation for frame are also patternized. Last, stylistic variation can help to identify hierarchical structure of frame is verified. This study is corpus-based that all of the data are face-to-face, spontaneous, dyadic conversations, extracted from NCCU Corpus of Spoken Mandarin. Seven samples are analyzed. “Turn” is using as measurement of linguistic unit to count the amount of stylistic variation for frame. In addition, only the goals of stylistic variation are counted and categorized. Criteria for data classification includes linguistic criteria (includes lexical devices and syntactic devices) and functional criteria (includes discourse structure, illocutionary acts, and Cooperative Principle). The results of data analysis show that (1) frame can be identified through stylistic variation of lexical choices based on semantic density, word formality, and word frequency, as well as through shifting of syntactic devices which include sentence complexity, sentence completeness, and sentence patterns. (2) On discourse level in a narrative, stylistic variation is most frequently used to signal elaboration, less is evaluation; on discourse level in a conversation, stylistic variation is most frequently used to signal topic continuity. (3) Among the five types of illocutionary acts, stylistic variation is applied most frequently for assertives, less for expressives and directives, and never for commisssives and declaration.(4) Among Cooperative Principle, stylistic variation is applied most frequently for Maxim of Quantity and Maxim of Manner. (5) Last, hierarchical structure of frame, including subordinate denotative level, metalinguistic level, and dominant metacommunicative level, are verified in this study.

La Synthèse Fischer-Tropsch (SFT) est une technologie clé pour transformer le gaz de synthèse (CO + 2H2) en hydrocarbures liquides, matières premières pour la chimie de base. Il s'avère que les catalyseurs à base de cobalt sont les plus performants et leur développement dans l'industrie impose au matériau support de posséder une conductivité thermique élevée et une structure ouverte. Dans ce travail, un nouveau support hiérarchisé constituée deα -Al2O3, recouvert homogènement de nanotubes de carbone, a été préparé pour supporter des catalyseurs au cobalt. Ces derniers montrent une très grande sélectivité en hydrocarbures liquides ainsi que de meilleures activités catalytiques. Les performances obtenus ont pu être améliorées en déposant une fine couche de TiO2 sur la surface des nanotubes de carbone, améliorant considérablement la dispersion du cobalt et l'activité. Le TiO2, également introduit dans la matrice de β-SiC lors de la synthèse, interagit fortement avec les sites actifs de cobalt, conduisant ainsi à sa grande dispersion et à une meilleure activité et stabilité dans la réaction de SFT. Parallèlement, un catalyseur à base de β-SiC de haute porosité, recouvert d'une couche de dioxyde de titane monocristallin a été développé et testé. Un taux spécifique de 1,2 gC5+. gcat -1. h-1 et une sélectivité en C5+ de 86% ont été obtenus. Ces performances sont les plus élevées signalées jusqu'à présent sur des catalyseurs sans cobalt. / The Fischer-Tropsch synthesis (FTS) is a key technology to transform the synthesis gas (2H2 + CO) into liquid hydrocarbons as the basic chemical feedstock. It can be found that the cobalt active sites supported on the materials with high thermal conductivity, opened structure is necessary to accelerate FTS synthesis process in the development of industry catalysts.In this work, a new hierarchical support consisting of α-Al2O3, which is homogeneously covered by a layer of carbon nanotubes, is successfully prepared to support cobalt catalyst. The supported cobalt catalysts show extremely high selectivity towards liquid hydrocarbons along with the better catalytic activity. The FTS performance obtained on this support can be further improved by coating a thin layer of TiO2 on the CNTs surface which significantly improve the cobalt dispersion and in turn,the FTS activity.The TiO2 is also successfully introduced into the matrix of β-SiC during the synthesis process which strongly interacts with cobalt active sites, leading to high dispersion of cobalt, accounting for the better activity and stability in FTS reaction. In the mean time, a highly activity Fischer-Tropsch catalyst based on single crystalline titanium dioxide coated high porosity β-SiC was also developed. The FT specific rate of 1.2 gC5+·gcat -1·h-1 and a C5+ selectivity of 86 % are obtained,which are among the highest FT performance reported up to now on cobalt noble-free catalyst .

X-ray detector windows must be thin enough to transmit sufficient low-energy x-rays, yet strong enough to withstand up to an atmosphere of differential pressure. Traditional low-energy x-ray windows consist of a support layer and pressure membrane spanning that support. Numerical modeling of several x-ray windows was used to show that both low- and high-energy x-ray transmission can be improved by adding a secondary support structure. Finite element analysis of the x-ray window models showed that the stress from a typical applied load does not exceed the ultimate strength or yield strength of the respective materials. The specific x-ray window models developed in this work may serve as a foundation for improving commercial windows, especially those geared toward low-energy transmission. For local mechanical film testing, microcantilevers were cut in suspended many-layer graphene using a focused ion beam. Multipoint force-deflection mapping with an atomic force microscope was used to record the compliance of the cantilevers. These data were used to estimate the elastic modulus of the film by fitting the compliance at multiple locations along the cantilever to a fixed-free Euler-Bernoulli beam model. This method resulted in a lower uncertainty than is possible from analyzing only a single force-deflection. The breaking strength of the film was also found by deflecting cantilevers until fracture. The average modulus and strength of the many-layer graphene films are 300 GPa and 12 GPa, respectively. The multipoint force-deflection method is well suited to analyze films that are heterogeneous in thickness or wrinkled. Bioimpedance can be measured by applying a known current to the tissue through two (current carrying) electrodes and recording the resulting voltage on two different (pickup) electrodes. Bioimpedance has been used to detect heart rate, respiration rate, blood pressure, and blood glucose. A wrist-based wearable bioimpedance device can measure heart rate by detecting the minute impedance changes caused by the modulation of blood volume in the radial artery. Using finite element analysis, I modeled how electrode position affects sensitivity to pulsatile changes. The highest sensitivity was found to occur when the pickup electrodes were centered over the artery. In this work, we used microfabricated carbon infiltrated-carbon nanotube electrodes to measure the change in contact bioimpedance for dry electrodes, and identical electrodes with a wet electrolyte, on five human subjects in the range of 1 kHz to 100 kHz. We found that the acclimated skin-electrode impedance of the dry electrodes approached that of the wet electrodes, especially for electrodes with larger areas. We also found that the acclimation time does not appear to depend on electrode area or frequency. The skin-electrode impedance after acclimation does depend on electrode area and frequency, decreasing with both. This work shows that if care is taken during the acclimation period, then dry carbon composite electrodes can be used in bioimpedance wearable applications.

No description available.

Denna studie belyser de faktorer som påverkar en students agerande ombord på ett fartyg när studenten bevittnar en situation där en individ ombord blir mobbad, trakasserad eller utsatt för kränkande särbehandling. Syftet med denna studie är att undersöka faktorer som påverkat studenten när hen har bevittnat mobbning, trakasserier och/eller kränkande särbehandling. Studien har utgått från semistrukturerade intervjuer med studenter från Sjöfartshögskolan i Kalmar. Dessa studenter har genomgått hela eller större delen av sin fartygsförlagda praktik. Respondenternas erfarenheter har bidragit till en tydlig bild kring detta problemområde. Resultatet visar att hierarki var den största bidragande faktorn som påverkade studentens agerande när hen bevittnat mobbning, trakasserier eller kränkande särbehandling. Resultatet visar också att trakasserier ombord på fartyg ofta beror på kulturella skillnader. / This study brings up factors that effects a student’s behaviour onboard a ship when he or she witnesses a situation when an individual is being bullied, harassed or is a victim to abusive treatment. The purpose of this study was to examine factors that effected a student when he or she witnessed bullying, harassment or/and abusive treatment. This study has been based on semi structured interviews with students from the Maritime University in Kalmar. These students have completed all or most of their ship-based practice. The respondents’ experiences have contributed to a clear picture of this problem area. The result showed that hierarchy was the biggest factor that effected a student’s behaviour when he or she had witnessed bullying, harassment, or abusive treatment. The result also shows that harassment onboard a ship often happens because of cultural differences.

La compréhension de la structure d’un logiciel est une première étape importante dans la résolution de tâches d’analyse et de maintenance sur celui-ci. En plus des liens définis par la hiérarchie, il existe un autre type de liens entre les éléments du logiciel que nous appelons liens d’adjacence. Une compréhension complète d’un logiciel doit donc tenir compte de tous ces types de liens. Les outils de visualisation sont en général efficaces pour aider un développeur dans sa compréhension d’un logiciel en lui présentant l’information sous forme claire et concise. Cependant, la visualisation simultanée des liens hiérarchiques et d’adjacence peut donner lieu à beaucoup d’encombrement visuel, rendant ainsi ces visualisations peu efficaces pour fournir de l’information utile sur ces liens. Nous proposons dans ce mémoire un outil de visualisation 3D qui permet de représenter à la fois la structure hiérarchique d’un logiciel et les liens d’adjacence existant entre ses éléments. Notre outil utilise trois types de placements différents pour représenter la hiérarchie. Chacun peut supporter l’affichage des liens d’adjacence de manière efficace. Pour représenter les liens d’adjacence, nous proposons une version 3D de la méthode des Hierarchical Edge Bundles. Nous utilisons également un algorithme métaheuristique pour améliorer le placement afin de réduire davantage l’encombrement visuel dans les liens d’adjacence. D’autre part, notre outil offre un ensemble de possibilités d’interaction permettant à un usager de naviguer à travers l’information offerte par notre visualisation. Nos contributions ont été évaluées avec succès sur des systèmes logiciels de grande taille. / Understanding the structure of software is an important first step in solving tasks of analysis and maintenance on it. However, in addition to the links defined by the hierarchy, there exists another type of links between elements of software that are called adjacency links. A complete understanding of software must take account of all these types of links. Visualization tools are generally effective in helping a developer in his understanding of software by presenting the information in a clear and concise manner. However, viewing these two types of links generate in general a lot of visual clutter, making these visualizations inefficient to provide useful information on these links. We propose in this M.Sc. thesis a 3D visualization tool that can represent both the hierarchical structure of an application and the adjacency relationships between its elements. Our tool uses three different types of layout to represent the hierarchy. Each layout can support efficiently the display of adjacency links. To represent adjacency links, we propose a 3D version of the Hierarchical Edge Bundles algorithm. We also use a metaheuristic algorithm to improve our layouts to further reduce visual clutter in the adjacency links. Moreover, our tool provides a set of interaction possibilities that allows a user to navigate through the information provided by our visualization. Our contributions have been evaluated successfully on large software systems.

La compréhension de la structure d’un logiciel est une première étape importante dans la résolution de tâches d’analyse et de maintenance sur celui-ci. En plus des liens définis par la hiérarchie, il existe un autre type de liens entre les éléments du logiciel que nous appelons liens d’adjacence. Une compréhension complète d’un logiciel doit donc tenir compte de tous ces types de liens. Les outils de visualisation sont en général efficaces pour aider un développeur dans sa compréhension d’un logiciel en lui présentant l’information sous forme claire et concise. Cependant, la visualisation simultanée des liens hiérarchiques et d’adjacence peut donner lieu à beaucoup d’encombrement visuel, rendant ainsi ces visualisations peu efficaces pour fournir de l’information utile sur ces liens. Nous proposons dans ce mémoire un outil de visualisation 3D qui permet de représenter à la fois la structure hiérarchique d’un logiciel et les liens d’adjacence existant entre ses éléments. Notre outil utilise trois types de placements différents pour représenter la hiérarchie. Chacun peut supporter l’affichage des liens d’adjacence de manière efficace. Pour représenter les liens d’adjacence, nous proposons une version 3D de la méthode des Hierarchical Edge Bundles. Nous utilisons également un algorithme métaheuristique pour améliorer le placement afin de réduire davantage l’encombrement visuel dans les liens d’adjacence. D’autre part, notre outil offre un ensemble de possibilités d’interaction permettant à un usager de naviguer à travers l’information offerte par notre visualisation. Nos contributions ont été évaluées avec succès sur des systèmes logiciels de grande taille. / Understanding the structure of software is an important first step in solving tasks of analysis and maintenance on it. However, in addition to the links defined by the hierarchy, there exists another type of links between elements of software that are called adjacency links. A complete understanding of software must take account of all these types of links. Visualization tools are generally effective in helping a developer in his understanding of software by presenting the information in a clear and concise manner. However, viewing these two types of links generate in general a lot of visual clutter, making these visualizations inefficient to provide useful information on these links. We propose in this M.Sc. thesis a 3D visualization tool that can represent both the hierarchical structure of an application and the adjacency relationships between its elements. Our tool uses three different types of layout to represent the hierarchy. Each layout can support efficiently the display of adjacency links. To represent adjacency links, we propose a 3D version of the Hierarchical Edge Bundles algorithm. We also use a metaheuristic algorithm to improve our layouts to further reduce visual clutter in the adjacency links. Moreover, our tool provides a set of interaction possibilities that allows a user to navigate through the information provided by our visualization. Our contributions have been evaluated successfully on large software systems.

No description available.