Dissertations / Theses on the topic 'JMTk'

The subject of diploma thesis is a blue-print of appropriate adjustment space by the railway station in Brno Řečkovice, in terms of road structures, so that it meets all requirements of public transfer terminal and IDS JMK. Terminal should server as a transfer station between bus service and pojected North-Southern Rail Diameter. In the terminal, there should be a continuity on systems P+R, K+R and B+R ensured. The project is dealing with a partial design of adjacent local roads. The work is processed in AutoCAD 2011, Bentley InRoads and Microsoft Office 2007.

La Empresa JMT Contact Center es una empresa que se dedica al rubro de Telemarketing, Centro de Contacto y Business Process Outsourcing, con presencia en los mercados de Europa y Latinoamérica. Es una empresa en constante crecimiento y en la actualidad a pesar de estar en medio de una Pandemia ha tenido el reto de enfrentar una demanda de crecimiento en los puestos de atención. En los últimos años, la empresa ha tenido que enfrentar ciertos retos financieros ligado a los costos planificados y a los costos operativos, de tal forma que su rentabilidad como negocio se ha visto impactada, sumando a ello nuevas regulaciones y el efecto de la pandemia a nivel global. El objetivo principal de la presente tesis es plantear un modelo de inteligencia de negocios para JMT Contact Center con la finalidad de reducir los costos operativos de la organización al mejorar la calidad de información utilizada en los procesos de planificación de operaciones, el discado dirigido y la categorización de perfiles de usuarios; para lo cual se analiza el contexto, se plantean los objetivos y se alinea la estrategia de inteligencia de negocios con los procesos existentes. La propuesta de este modelo de inteligencia de negocios se enfoca especialmente en el uso efectivo de las herramientas del Business Intelligence para lograr una optimización de recursos y costos en la operación de las campañas Outbound del Centro De Atención Telefónica, de tal forma que estas se conviertan en rentables y eviten perdidas a la organización.<br>The JMT Contact Center Company is a company dedicated to the Telemarketing, Contact Center and Business Process Outsourcing business, with a presence in the markets of Europe and Latin America. It is a company in constant growth and today, despite being in the middle of a Pandemic, it has had the challenge of facing a demand for growth in service positions. In recent years, the company has had to face certain financial challenges related to planned costs and operating costs, in such a way that its profitability as a business has been impacted, adding new regulations and the effect of the pandemic at the global. The main objective of this thesis is to propose a business intelligence model for JMT Contact Center in order to reduce the operational costs of the organization by improving the quality of information used in the operations planning processes, directed dialing and categorization of user profiles; for which the context is analyzed, objectives are set and the business intelligence strategy is aligned with existing processes. The proposal of this business intelligence model focuses especially on the effective use of Business Intelligence tools to achieve an optimization of resources and costs in the operation of the Outbound campaigns of the Call Center, in such a way that they become profitable and avoid losses to the organization.<br>Trabajo de investigación

This thesis focuses on the development proposal on the use of multimedia in primary and secondary schools. It specifies the conditions and requirements of entrepreneurs, who implement their business plan for development education and multimedia. Includes document preparation for applying for funding to support schools in the South Region in the development of multimedia in teaching.

The process optimization of continuous annealing furnace, RHF 125, for recrystallization annealing of two steel grades, Sandvik 13C26 and Sandvik 20C has been carried out. To recreate the continuous annealing process carried out in the roller hearth furnace in the industry, samples with different cold reduction rates were chosen from ongoing production lines. An experimental heat treatment model was chosen by the ‘Design of Experiments’ approach from MODDE (from U-Metrics). The annealing temperature was chosen below the austenitization temperature for both steel grades and soaking time of 30 seconds to 240 seconds were chosen. Microscopic estimation of fraction recrystallized was performed with the help of Electron Back Scattered Diffraction, accompanied by mechanical testing methods to measure the hardness and yield strength of the steel strips. The experimental output was used to create a model to correlate between the different cold reduction rates and annealing parameters to achieve a higher degree of recrystallization along with desirable mechanical properties. Also, a modified Johnson-Mehl-Avrami-Kolomogrov model, based on hardness values, to determine the transformation kinetics by tracking the progress of recrystallization was developed. The model was verified with EBSD measurements for Sandvik 13C26 strip steels. For 20C, inhomogeneous recrystallization was observed, thus limiting the model’s adaptability to steels which exhibit homogeneous recrystallization behavior and negligible change in precipitation and/or coarsening of secondary phases.<br>Processoptimering av en kontinuerlig glödgningsugn, RHF 125, för rekristallisationsglödgning av två Sandvik-stål, Sandvik 13C26 och Sandvik 20C, har genomförts. För att återskapa den kontinuerliga glödgningsprocessen som utförs den verkilga processen i valdes prover och olika kallreduktionshastigheter från pågående produktionslinjer. En experimentell värmebehandlingsmodell valdes med metoden 'Design of Experiments' med MODDE (från U-Metrics). Glödgningstemperaturen valdes till en temperatur under austeniseringstemperaturen för båda stålen och hålltider varierade från 30 s till 240 s. Mikroskopisk uppskattning av fraktionen rekristalliserat material utfördes med hjälp av Electron Back Scatter Diffraktion (EBSD), åtföljd av mekaniska testmetoder för att mäta hårdheten och sträckgränsen för stålproverna. De experimentella resultaten användes för att skapa en modell för att korrelera mellan de olika reduktionshastigheterna och glödgningsparametrarna för att uppnå högre grad av rekristallisation tillsammans med önskvärda mekaniska egenskaper. Dessutom utvecklades en modifierad Johnson-Mehl-Avrami-Kolomogrov-modell, baserad på hårdhetsvärden, för att bestämma transformationskinetiken genom att spåra evolutionen för rekristallisation. Modellen verifierades genom jämförelse med EBSD-mätningarna för Sandvik 13C26 bandstål. För 20 °C observerades inhomogen rekristallisation, vilket begränsade modellens användbarhet till stål som uppvisade homogent rekristallisationsbeteende och försumbar förändring i utskiljning och/eller förgrovning av sekundära faser.

En France, les déchets de Haute Activité à Vie Longue (HAVL) issus du retraitement du combustible nucléaire usé sont confinés à l’échelle atomique dans un verre borosilicaté appelé le verre R7T7. Lors de son élaboration à haute température, des cristaux incorporant les radionucléides se forment de manière transitoire sous différentes conditions dans le liquide avant d’être dissouts. Jusqu’à présent, de nombreuses études se sont portées sur la cristallisation de ces phases mais leur dissolution n’a pas fait l’objet d’étude approfondie. L’objectif de cette thèse est de décrire les cinétiques et les mécanismes de la dissolution des cristaux dans le liquide borosilicaté.Dans ce but, la dissolution de silicates de terres rares de structure apatite, type Ca2TR8(SiO4)6O2, est étudiée en conditions isothermes dans trois compositions borosilicatées différentes en système fermé. Afin de suivre l’évolution des fractions cristallines au cours du temps, une méthodologie basée sur l’acquisition de mosaïques d’images MEB associée à du traitement d’images a été optimisée. En compléments, des profils chimiques aux interfaces cristaux/verre sont également réalisés par microsonde électronique.Le modèle Johnson-Mehl-Avrami-Kolmogorov (JMAK), habituellement employé pour décrire la cristallisation dans les verres, est appliqué avec succès aux fractions cristallines mesurées au cours de la dissolution. L’application de ce modèle pour différentes températures de traitement thermique valide son efficacité à décrire les cinétiques de dissolution des silicates de terres rares dans des systèmes borosilicatés en régime statique. Son application est également étendue à des systèmes plus complexes présentant simultanément plusieurs phases cristallines de nature autre que les silicates de terres rares. De plus, ce modèle permet d’accéder au mécanisme contrôlant la dissolution des cristaux dans les liquides borosilicatés (dans les systèmes étudiés, la diffusion), à l’énergie d’activation de leur dissolution ainsi qu’aux constantes de dissolution et aux durées caractéristiques de la dissolution pour chaque température<br>In France, High-Level radioactive Wastes (HLW) coming from nuclear spent fuel treatment are confined at the atomic scale in an homogeneous sodium-borosilicate glass called the R7T7 glass. At different stages of the melting process performed at high temperature, crystallized phases which incorporate the radionuclides are temporarily formed before their dissolution. The formation conditions of these crystals have already been studied but, to date, few studies on their dissolution in nuclear glass melt have been performed. The objective of this thesis is the description of the kinetics and mechanisms of the crystals dissolution in the borosilicate melt.This study focuses on the dissolution of rare earth silicates with an apatite structure (Ca2Nd8(SiO4)6O2 type) in three borosilicate melt compositions. Experiments are conducted in isothermal mode and in closed system. The crystalline fractions are followed according to time thanks to the acquisition of SEM images mosaics coupled with image analysis. In addition, chemical profiles at the crystal/melt interfaces are acquired by microprobe.The Johnson-Mehl-Avrami-Kolmogorov (JMAK) model, usually applied to describe the crystallization in melt, is successfully applied to the crystalline fractions measured during the dissolution process. The application of this model for different temperatures of thermal treatment validates its effectiveness to describe the dissolution kinetics of rare earth silicates in borosilicate systems in static mode. Its application is furthermore extended to the crystals dissolution in more complex systems where different types of crystals are simultaneously present. This model allows to determine the mechanism limiting the crystals dissolution in borosilicate melts, i.e. the diffusion in the studied systems, the activation energy of the dissolution as well as the constants of dissolution and the characteristic durations of dissolution for each considered temperature

No presente trabalho estudou-se a recristalização do aço de alta resistência baixa liga (ARBL) microligado ao nióbio (160 ppm em peso) da Companhia Siderúrgica Nacional 2336 utilizado na fabricação de reforços estruturais para a indústria automobilística. A grande utilização deste tipo de aço pelas indústrias tem motivado o desenvolvimento de novas ligas capazes de atender a requisitos críticos de estampagem combinado com alta resistência mecânica. Amostras deste aço no estado laminado a quente foram deformadas posteriormente a frio em escala piloto com reduções de 50 e 70%, reduções típicas na indústria, e recozidas em banho de sal em temperaturas variando entre 600 e 700ºC em diferentes tempos. A evolução microestrutural das amostras no estado encruado e na condição recozida foi acompanhada utilizando-se as técnicas de microscopia ótica e eletrônica de varredura. As texturas de deformação e de recristalização foram determinadas via difração de raios X. A fração volumétrica recristalizada (Xv) e o tamanho de grão foram determinados com o auxílio de metalografia quantitativa nas amostras recozidas. Medidas de microdureza Vickers foram utilizadas para construir as curvas de encruamento e da cinética de amolecimento em função da temperatura de recozimento e comparadas com curvas construídas pelo primeiro método. Os resultados mostram que a recristalização ocorre em temperaturas acima de 650°C. Com auxílio de um gráfico de Xv contra A (fração amolecida), podemos observar a ocorrência de um desvio da idealidade a 650°C e 700°C. A explicação mais provável é a ocorrência de precipitação, especialmente para o aço menos deformado. Os valores do expoente de Avrami obtidos a partir das duas abordagens (medidas de microdureza e metalografia quantitativa) são apresentados e discutidos.<br>The recrystallization of a high strength low alloy steel (HSLA) containing niobium (160 wt-ppm) was investigated. The HSLA steel, named CSN 2336, is used in the manufacture of structural parts for automotive industry. The increasing use of this application type of steels in automotive industries has motivated the development of new alloys able to gather the critical requirements for deep drawing combined with high strengths. Samples of this steel in hot-rolled condition were cold-rolled with reductions of 50% and 70%, commonly used in most of applications, and isothermally annealed in salt bath at temperatures between 600 and 700ºC. The microstructure of the samples in both coldworked and annealed states was imaged using light optical (LOM) and scanning electronic microscopies (SEM). Deformation and recrystallization textures were determined by X-ray diffraction. The recrystallized volume fraction (Xv) and the mean grain size were determined by quantitative metallography in the annealed samples. Vickers microhardness testing was used to determine the work hardening and the softening kinetics behaviors. The results show that recrystallization occurs at temperatures above 650°C for the most deformed steel. By plotting Xv against A (softening fraction), we observe the occurrence of a deviation from ideality at 650°C and 700°C, likely caused by solid-state precipitation, especially for the less deformed steel. The values of n (Avrami exponent) obtained from both approaches (softening curves and quantitative metallography) are presented and discussed.

Förr fanns det en bild av IT och internet som en gräddfil till rikedomar och att om man som företag inte hade en hemsida så var man inte med på marknaden. Idag finns samma bild fast för Facebook som är ett av världens största sociala nätverk med 727 miljoner dagliga användare. Men eftersom att Facebook är relativt nytt och förändras ofta så finns det inte mycket litteratur eller forskning på huruvida Facebook är en effektiv plattform för marknadskommunikation.   Denna studie ser på om Facebook verkligen är så effektivt och om man verkligen når så många människor. Detta genom att granska företaget Picards användning av Facebook som en plattform för marknadskommunikation, från lansering till idag, samt att se på huruvida de når sin målgrupp. Undersökningen görs genom kvalitativa samt kvantitativa intervjuer.   Resultatet visar att den tidigare forskning som finns, är aktuell än idag. Facebook är en effektiv plattform för marknadskommunikation om den sköts ordentligt och på rätt sätt. Det är viktigt att ha en strategi, ett kännande, ett engagemang och ett gensvar. Man bör även vara medveten om att det är en plattform som förändras.   Resultatet visar även att Picard delvis når sin målgrupp på Facebook men att kunderna i butiken är äldre än målgruppen och har förmodligen inte ett Facebook-konto och därmed inte nås av stora delar av marknadskommunikationen. Även detta är viktigt att ha i åtanke. Även bland fansen på Facebook visade sig är de flesta vara äldre än målgruppen.

Abstract   Hot mot journalister är inget nytt fenomen. Däremot är debatten kring denna problematik mer aktuell än någonsin. Samtidigt råder det en viss brist på vetenskapliga undersökningar, som går på djupet vad gäller enskilda journalister och deras erfarenheter av hot. Det huvudsakliga syftet med denna uppsats är därför att utforska åtta journalisters upplevelser i samband med sådana. Utöver detta kommer jag dessutom att analysera hotupplevelserna utifrån journalistikens uppgifter enligt olika demokratimodeller.  Mina teoretiska verktyg består vid sidan av teorier rörande olika demokratimodeller och deras syn på journalistik av känslo- och problemfokuserade copingstrategier mot vilka jag kommenterar journalisternas upplevelser. Vad gäller metod har jag intervjuat respondenterna i enlighet med en semistrukturerad intervjuform samt använt mig av en kvalitativ innehållsanalys. När det kommer till frågan om hur mina respondenter påverkas av hot på ett mentalt plan är några av fallen särskilt anmärkningsvärda. En av journalisterna talar i termer av en slags depression medan en annan berättar att han, som en konsekvens av de hot han utsatts för, ibland överreagerar i helt oskyldiga situationer. Samtidigt har ingen av de journalister, som ingår i denna undersökning, någonsin övervägt att ge upp sitt yrke och det är dessutom relativt ovanligt att man avstår eller modifierar en text på grund av rädsla för repressalier. Mina resultat visar dock att hot mot journalister samt eventuella konsekvenser kan ha en negativ effekt på olika demokratiska ideal. Frågan huruvida dessa hot utgör ett demokratiskt problem är på samma gång en komplex fråga, som är beroende dels av vilka journalistiska uppgifter anammad demokratimodell kräver och dels på situation. Till sist har arbetsgivaren och redaktionerna ett stort ansvar över att hörsamma sina arbetstagare och tillgodose deras behov av stöd och samtal vid upplevelser av hot. Såväl min uppsats, som tidigare forskning, visar att detta inte alltid fungerar som det borde.

Submitted by Angela Maria de Oliveira (amolivei@uepg.br) on 2018-12-21T10:53:57Z No. of bitstreams: 2 license_rdf: 811 bytes, checksum: e39d27027a6cc9cb039ad269a5db8e34 (MD5) Giovanne Steudel.pdf: 9400807 bytes, checksum: 8a6ed5c0cfacf8380363dfd4584186c1 (MD5)<br>Made available in DSpace on 2018-12-21T10:53:57Z (GMT). No. of bitstreams: 2 license_rdf: 811 bytes, checksum: e39d27027a6cc9cb039ad269a5db8e34 (MD5) Giovanne Steudel.pdf: 9400807 bytes, checksum: 8a6ed5c0cfacf8380363dfd4584186c1 (MD5) Previous issue date: 2018-08-27<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>O objetivo deste trabalho é avaliar os efeitos na cinética de transformação e nas propriedades mecânicas dos aços inoxidáveis ferrítico AISI 430 (16-18% Cr) e superdúplex SAF 2507 (24-26% Cr), quando submetidos a tratamentos térmicos de envelhecimento em 475°C, assim fragilizados pela formação da fase alfa linha. Este fenômeno é conhecido por “fragilização de 475°C” e ocorre na ferrita de aços inoxidáveis ferríticos e dúplex, e nos aços martensíticos envelhecidos entre 300°C e 550°C. O acompanhamento e análise da cinética de formação de α’ nos dois aços inoxidáveis, o ferrítico AISI 430 e superdúplex SAF 2507, foram feitas com base em ajustes matemáticos por regressão não-linear via sete modelos sigmoidais de aplicação geral, os quais serão comparados ao modelo JMAK de transformação de fases difusivas elaborada por Johnson, Mehl, Avrami e Kolmogorov. Amostras do aço ferrítico foram submetidas a tratamentos térmicos de solubilização em forno tubular em 1050 °C e 30 minutos, e em 1150°C durante 30 minutos para o aço dúplex. Tratamentos de envelhecimento posteriores em 475°C por diversos períodos foram realizados. Verificou-se a evolução da “fragilização de 475°C” e, indiretamente, a formação de α’, por ensaios de dureza Vickers, de tração e de impacto instrumentado Charpy. Análises microestruturais e fractográficas foram feitas em microscopias óptica e eletrônica de varredura (MEV-FEG); análises cristalográficas por difração de elétrons retroespalhados (EBSD); e as análises químicas por espectroscopia por dispersão de energia (EDS). O aço superdúplex, com aproximadamente 25,2% Cr, apresentou cinética de fragilização mais rápida do que o ferrítico, com cerca de 16,6% Cr. O modelo sigmoidal que mais se adequou aos dados de dureza de ambos os aços foi o de Boltzmann; o qual também apresentou maior versatilidade de informações e melhor ajuste e capacidade preditiva do que o modelo JMAK. As tendências para tempos de envelhecimento crescentes do aço AISI 430 foram o aumento dos limites de escoamento e de resistência à tração, com dados de tensão na ruptura oscilando em função do tempo de envelhecimento, porém a literatura aponta aumento também da tensão de ruptura. A mudança de comportamento de dúctil para frágil (clivagem) do aço AISI 430, em função do prosseguimento da “fragilização de 475°C”, foi mais acentuada nos corpos de prova de impacto, em relação aos de tração.<br>The goal of this work is to evaluate the effects in the transformation kinetics and in the mechanical properties of the AISI 430 (16-18% Cr) ferritic and the SAF 2507 (24-26% Cr) superduplex stainless steels, when they undergo aging heat treatments at 475°C, thus embrittled by the formation of the alpha prime phase. This phenomenon is known as “475°C embrittlement” and it occurs in the ferrite of ferritic and duplex stainless steels, and in martensitic stainless steels aged between 300°C and 550°C. The monitoring and analysis of the kinetics of α’ formation in the AISI 430 and SAF 2507 steels was done based on mathematical fitting by means of nonlinear regression of seven sigmoidal models of general application, whose were compared to the JMAK model of diffusive phase transformations elaborated by Johnson, Mehl, Avrami and Kolmogorov. Ferritic steel samples were submitted to solubilization heat tratments in a tubular furnace at 1050°C for 30 minutes, and at 1150°C during 30 minutes for the duplex steel. Posterior aging treatments will hold at 475°C by various periods. The evolution of the “475°C embrittlement” and, indirectly, the formation of α’, were verified by the way of Vickers hardness, tensile and Charpy instrumented impact tests. Microstructural and fractographic analyses were done by optical and scanning electron microscopies (FEG-SEM); crystallographic analyses by electron backscattered diffraction (EBSD); and chemical analyses by energy dispersive spectroscopy (EDS). The superduplex steel, containing approximately 25,2% Cr, showed a faster embrittlement kinetics than the ferritic steel, with about 16,6% Cr. The sigmoidal model that better fitted to the hardness data of both steels was the Boltzmann one; which also showed greater versatility of information and a better fit and predictive ability than the JMAK model. The trends for rising aging times of the AISI 430 steel were the increase in the yield and ultimate tensile stresses, having oscillation in the breaking stress in function of the aging time, yet the literature claims that there is also a increase in the breaking stress. The change in the mechanical behavior from ductile to brittle (cleavage) of the AISI 430 steel, in function of the following of the “475°C embrittlement”, was more severe in the impact test specimens, compared to the tensile specimens.

This theses is focused on the European Union and EU funds. Description of structural policy and its history, with a focus on structural and cohesion funds. Furthermore, attention is focused on the subsidy received from the ROP southeast. In summary is given a new programming framework 2014-2020. The practical part of the thesis was to describe, analyze and evaluate the project co-financed by EU structural funds. The project was implemented within the ROP SE and tackle integrated transport in the region Breclav.

Les propriétés d'usage de l'alliage Ti17 dépendent fortement de la taille, de la morphologie et de la répartition des précipités de phase α au sein de la matrice β. Ces paramètres microstructuraux découlent des conditions de traitement thermomécanique et c'est pourquoi la maîtrise des propriétés mécaniques et l'optimisation des procédés nécessitent de connaître les microstructures finales comme leur évolution pendant leur mise en oeuvre. A cet effet, deux approches de modélisation sont développées dans le cas du refroidissement consécutif au forgeage à haute température :<br />La première approche utilise la loi de Johnson – Mehl – Avrami – Kolmogorov (JMAK) qui permet de prédire, à l'échelle macroscopique, la proportion des différentes morphologies de la phase α. Le calcul métallurgique nécessite au préalable la mesure des cinétiques isothermes de transformation afin de déterminer les paramètres de la loi de JMAK. Des refroidissements continus à température contrôlée sont simulés, la comparaison avec l'expérience se révélant concluante. Le cas de pièces massives, sièges de gradients thermiques et microstructuraux est alors envisagé. Les données thermophysiques de l'alliage et l'enthalpie de transformation étant mesurées au préalable, les évolutions couplées thermiques et microstructurales sont prédites à l'aide du logiciel de calcul par Eléments Finis ZeBuLoN dans lequel nous avons introduit le modèle de calcul de cinétique de transformation de phase. Les calculs sont comparés aux résultats obtenus lors d'expériences de refroidissement de cylindres instrumentés. Le module de calcul ainsi obtenu est appliqué au cas d'une pièce industrielle.<br />La deuxième approche repose sur la modélisation de la germination et de la croissance des précipités de phase α aux joints de grain. Ce calcul à l'échelle microscopique, celle des précipités, permet de prédire l'influence de la déformation plastique dans le domaine β sur la transformation de phase. Le modèle s'appuie sur les microstructures de déformation de la phase β à haute température, (par exemple la taille de grain recristallisé), fonction des conditions de déformation. Les cinétiques de transformation sont prédites pour divers traitements à température contrôlée consécutifs à une simple mise en solution ou bien à une déformation plastique dans des conditions données. Concernant la prise en compte d'une pré déformation, la comparaison avec des résultats expérimentaux de la littérature est concluante. Par ailleurs, le modèle est utilisable sur d'autres alliages (connaissance des compositions d ‘équilibre des phases et des coefficients de diffusion) et il permet d'accéder à des paramètres microstructuraux tels que des tailles de précipités.

This project compare several well-known PHP frameworks and their main characteristics. Creating the content management system with using sophisticated administration interface and access rights. Realization module for ordering and managing smart card for public transport company. Using modern payment methods using 3D secure. Dynamically change the price lists, zones and types of cards. It is created checking neighbor zones that can not be chosen meaningless combinations zones.

This thesis is a documentation covering complete design and implementation of a mobile public transportation assistant for Brno. The resulting solution consists of a mobile application and a server part. The mobile application allow user with actual position of public transport vehicles and positon of smart device navigate and determine optimal route. The server part includes web service for client-server communication.

The thesis deals with design of the tram power collecting route and the tram track of the route no. 3 in reconstruction area recently called “Zbrojovka Brno”. Connection to the present infrastructure is also considered. Housing, resting, administration sectors and tram stops are designed for easy availability in the new area. Because the railroad bounds the area on the East and will be extended in the future, joining the tram transport with integrated transport system in Židenice is possible. Design includes the new bridge across Svitava river and connection with surrounding areas. If we divide individual car transport (IAD) from the tram route, the trolley car transportation is designed in place IAD.

In an effort to minimize the harmful effects of intracellular ice formation (IIF) during cryopreservation of confluent tissues, computer simulations based on Monte Carlo methods were performed to predict the probability of IIF in confluent monolayers during various freezing procedures. To overcome the prohibitive computational costs of such simulations for large tissues, the well-known Johnson-Mehl-Avrami (JMA) model of crystallization kinetics was implemented as a continuum approximation of IIF in tissues. This model, which describes nucleation, growth, and impingement of crystals in a supercooled melt, is analogous to the process of intracellular ice formation and propagation in biological tissues. Based on the work of Weinberg and Kapral (1989), the JMA model was modified to account for finite-size effects, and was shown to predict accurately the results of freezing simulations in 1-D tissue constructs, for various propagation rates and tissue sizes. An initial analysis of IIF kinetics in 2-D tissues is also presented. The probability of IIF in 2-D liver tissue was measured experimentally during freezing of HepG2 cells cultured in monolayers, and compared to Monte Carlo simulations and predictions of the continuum model. The Avrami coefficient and exponent for IIF in HepG2 tissue were estimated to be k = 0.19 and n = 0.45.

Site is situated northwest of existing borders of BVV. This location is based on urban design from last semester. The design focuses on function and sustainable design. Fire station is type P4 (2 firefighting groups) for firefighters of Jihomoravský kraj with direct connection to BVV. Because of need to fast access to BVV. The firestation has grounds for training of fire sports and training with car wrecks. Health and safety center (CZAB) with main building and outside area. This center is focused on training public in area of dangers of everyday life. The center is simulator of these risks and is based on living through the situations in safe space under profesional guidance. Center can be connected with BVV. Both grounds are connected together with humanitary hall which serves as training space for firefighters and learning space for CZAB and in case of humanitary needs can be used as humanitary hall.

JMTk is a memory management toolkit written in Java for the JikesRVM Java Virtual Machine. JMTk provides reusable components for the development of allocation and garbage collection algorithms, and an efficient implementation of a rapidly growing number of memory management schemes, and is a significant enabler for memory management research. A portable version of JMTk would allow the growing body of memory management research done using it to be repeated in different language environments, and to study the different performance characteristics of algorithms across programming languages without the variation in implementation techniques that clouds such issues today. This thesis describes a project that has ported JMTk for use in C/C++ based lan­ guage runtimes. The project has used the gcj ahead­of­time java compiler and a source transformation technique to produce a version of JMTk that can efficiently perform memory management for traditionally compiled systems. It is currently running in a testbed environment, where it provides interesting comparisons between accurate and conservative garbage collection techniques. The source transformation tool is currently in use by a team at Purdue, to integrate JMTk into the OVM Java Virtual machine. This thesis also describes partially completed work to incorporate JMTk into the runtime of the Glasgow Haskell Compiler (ghc), and describes the difficulties that were encountered in the process, and an approach that should enable the work to be completed in the future. The thesis describes the architecture and construction of the ported system, the source code transformation process used, and evaluates the performance of the final product. It also explores possible future extensions of the techniques used, looks at the issues surrounding working with complex software such as the ghc runtime, and provides a brief evaluation of Java as a system programming language. The key contribution of this thesis is therefore the availability of JMTk to researchers and developers of language runtimes, and a convincing demonstration of the use of Java in a new application domain.

Modern object oriented languages such as Java and C# have been gaining widespread industry support in recent times. Such languages rely on a runtime infrastructure that provides automatic dynamic memory management services. The performance of such services is a crucial component of overall system performance. This thesis discusses work undertaken in relation to automatic memory management using the Java Memory Management Toolkit (JMTk) running on the Jikes Research Virtual Machine (Jikes RVM). The primary goal of this work was to develop an automatic memory management strategy employing a compacting collector to run on this platform. Compacting collectors are an important class of collectors used in several production runtimes, including Microsoft's Common Language Runtime and IBM's Java Runtime Environment. The development of a strategy using compaction makes an important contribution to JMTk, and provides a platform where side-by-side comparisons between compacting collectors and other important classes of collector can be made. A compacting collector differs from the collectors that currently exist in JMTk in several important ways. Prior to this work, JMTk and Jikes RVM did not have an implementation of a compacting collector, nor the structure to fully support one. This work has achieved its primary goal in providing an implementation of a compacting collector. It describes how both JMTk and Jikes RVM were modified to support such collectors. Although substantial, this project should be considered but a first step into the investigation of this class of collectors. It is anticipated that through broadening the set of operations supported by JMTk and Jikes RVM that this work will also allow new classes of collectors to be implemented and compared. The cost of performing a compacting collection was shown to be very significant given the current implementation. The use of compaction in a generational collector demonstrated increased performance, bringing it in-line with other generational collectors in JMTk. This work shows that there are benefits in reducing memory fragmentation through the use of compacting collectors. When discounting the cost of the collection, the implemented compacting collectors come close to matching or outperforming other collection strategies. The difficulty now lies in attempting to reduce the cost of compacting collection.

Object-oriented programing languages are becoming increasingly important as are managed runtime-systems. An area of importance in such systems is dynamic automatic memory management. A key function of dynamic automatic memory management is detecting and reclaiming discarded memory regions; this is also referred to as garbage collection. A significant proportion of research has been conducted in the field of memory management, and more specifically garbage collection techniques. In the past, adequate comparisons against a range of competing algorithms and implementations has often been overlooked. JMTk is a flexible memory management toolkit, written in Java, which attempts to provide a testbed for such comparisons. This thesis aims to examine the implementation of one algorithm currently available in JMTk: the deferred reference counter. Other research has shown that the reference counter in JMTk performs poorly both in throughput and responsiveness. Several aspects of the reference counter are tested, including the write barrier, allocation cost, increment and decrement processing and cycle-detection. The results of these examinations found the bump-pointer to be 8% faster than the free-list in raw allocation. The cost of the reference counting write barrier was determined to be 10% on the PPC architecture and 20% on the i686 architecture. Processing increments in the write barrier was found to be up to 13% faster than buffering them until collection time on a uni-processor platform. Cycle detection was identified as a key area of cost in reference counting. In order to improve the performance of the deferred reference counter and to contribute to the JMTk testbed, a new algorithm for detecting cyclic garbage was described. This algorithm is based on a mark scan approach to cycle detection. Using this algorithm, two new cycle detectors were implemented and compared to the original trial deletion cycle detector. The semi-concurrent cycle detector had the best throughput, outperforming trial deletion by more than 25% on the javac benchmark. The non-concurrent cycle detector had poor throughput attributed to poor triggering heuristics. Both new cycle detectors had poor pause times. Even so, the semi-concurrent cycle detector had the lowest pause times on the javac benchmark. The work presented in this thesis contributes to an evaluation of components of the reference counter and a comparsion between approaches to reference counting implementation. Previous to this work, the cost of the reference counter's components had not been quantified. Additionally, past work presented different approaches to reference counting implementation as a whole, instead of individual components.

We have access to great variety of datasets more than any time in the history. Everyday, more data is collected from various natural resources and digital platforms. Great advances in the area of machine learning research in the past few decades have relied strongly on availability of these datasets. However, analyzing them imposes significant challenges that are mainly due to two factors. First, the datasets have complex structures with hidden interdependencies. Second, most of the valuable datasets are high dimensional and are largely scaled. The main goal of a machine learning framework is to design a model that is a valid representative of the observations and develop a learning algorithm to make inference about unobserved or latent data based on the observations. Discovering hidden patterns and inferring latent characteristics in such datasets is one of the greatest challenges in the area of machine learning research. In this dissertation, I will investigate some of the challenges in modeling and algorithm design, and present my research results on how to overcome these obstacles. Analyzing data generally involves two main stages. The first stage is designing a model that is flexible enough to capture complex variation and latent structures in data and is robust enough to generalize well to the unseen data. Designing an expressive and interpretable model is one of crucial objectives in this stage. The second stage involves training learning algorithm on the observed data and measuring the accuracy of model and learning algorithm. This stage usually involves an optimization problem whose objective is to tune the model to the training data and learn the model parameters. Finding global optimal or sufficiently good local optimal solution is one of the main challenges in this step. Probabilistic models are one of the best known models for capturing data generating process and quantifying uncertainties in data using random variables and probability distributions. They are powerful models that are shown to be adaptive and robust and can scale well to large datasets. However, most probabilistic models have a complex structure. Training them could become challenging commonly due to the presence of intractable integrals in the calculation. To remedy this, they require approximate inference strategies that often results in non-convex optimization problems. The optimization part ensures that the model is the best representative of data or data generating process. The non-convexity of an optimization problem take away the general guarantee on finding a global optimal solution. It will be shown later in this dissertation that inference for a significant number of probabilistic models require solving a non-convex optimization problem. One of the well-known methods for approximate inference in probabilistic modeling is variational inference. In the Bayesian setting, the target is to learn the true posterior distribution for model parameters given the observations and prior distributions. The main challenge involves marginalization of all the other variables in the model except for the variable of interest. This high-dimensional integral is generally computationally hard, and for many models there is no known polynomial time algorithm for calculating them exactly. Variational inference deals with finding an approximate posterior distribution for Bayesian models where finding the true posterior distribution is analytically or numerically impossible. It assumes a family of distribution for the estimation, and finds the closest member of that family to the true posterior distribution using a distance measure. For many models though, this technique requires solving a non-convex optimization problem that has no general guarantee on reaching a global optimal solution. This dissertation presents a convex relaxation technique for dealing with hardness of the optimization involved in the inference. The proposed convex relaxation technique is based on semidefinite optimization that has a general applicability to polynomial optimization problem. I will present theoretical foundations and in-depth details of this relaxation in this work. Linear dynamical systems represent the functionality of many real-world physical systems. They can describe the dynamics of a linear time-varying observation which is controlled by a controller unit with quadratic cost function objectives. Designing distributed and decentralized controllers is the goal of many of these systems, which computationally, results in a non-convex optimization problem. In this dissertation, I will further investigate the issues arising in this area and develop a convex relaxation framework to deal with the optimization challenges. Setting the correct number of model parameters is an important aspect for a good probabilistic model. If there are only a few parameters, model may lack capturing all the essential relations and components in the observations while too many parameters may cause significant complications in learning or overfit to the observations. Non-parametric models are suitable techniques to deal with this issue. They allow the model to learn the appropriate number of parameters to describe the data and make predictions. In this dissertation, I will present my work on designing Bayesian non-parametric models as powerful tools for learning representations of data. Moreover, I will describe the algorithm that we derived to efficiently train the model on the observations and learn the number of model parameters. Later in this dissertation, I will present my works on designing probabilistic models in combination with deep learning methods for representing sequential data. Sequential datasets comprise a significant portion of resources in the area of machine learning research. Designing models to capture dependencies in sequential datasets are of great interest and have a wide variety of applications in engineering, medicine and statistics. Recent advances in deep learning research has shown exceptional promises in this area. However, they lack interpretability in their general form. To remedy this, I will present my work on mixing probabilistic models with neural network models that results in better performance and expressiveness of the results.

The following bachelor thesis focuses on analysis of the selected demographic and economic indicators in socio-economically disadvantaged microregions such as Vranovsko, Hornacko and Mala Hana in the years 2001-2011. In this timeframe the indicators of population trends, age index, level of entrepreneurial activity, unemployment rate are being analyzed and compared to those in the South Moravian Region. Their socio-economic situation is evaluated on the basis of the obtained data. The evaluated microregions are further subjugated to analysis of the basic demographic processes displayed by dint of the demographic characteristics (birth rate, mortality, natural reproduction, migration). By using of the time series compensation method and suitable mathematic function their development trend is predicted until the year 2020.

This thesis is focused on the integration of foreigners in South-Moravian region. The first part is devoted to introduction of this topic, theoretical models of integration process and the current situation concerning foreigners in the European Union and the Czech Republic. The second part is more focused on South-Moravian region, the current situation regarding foreigners, the most important actors of integration, local integration policy and approaches and dimensions of integration. The research examines the outputs from interviews with representatives of non-profit organisations that provide services for foreigners in South-Moravian region. In the end the biggest problems and obstacles associated with integration in the region will be identified, as well as their possible solutions. In the final discussion there are other suggestions that can be valuable for creation new conceptual documents in the region.

The objective of this study is to estimate the CAPM for the two Portuguese retail companies listed in the PSI-20 (JMT and SON) and assess how the two of them evolve regarding the Portuguese market index. This study covered sixteen years (pre and post-subprime crisis) and, based on estimation results, we established a comparison between the relation of each company with the PSI-20. We also analysed the differences before and after the 2008 financial crisis. For this purpose, the estimation of α and β coefficients was done by using the OLS method, and the adequacy of the model was checked by verifying the statistical significance of the regression coefficients and the fulfilment of the OLS assumptions. Finally, the main conclusion is that the two companies tend to behave differently concerning the Portuguese market index. All the beta estimates were statistically significant, meaning that changes in the PSI-20 returns will influence the changes on each company’s returns, which is in line with the CAPM. However, except for two periods for JMT, the alpha estimates were statistically significant, meaning that there were additional factors other than the market risk premium that explained the expected value of excess returns. We could also note that the expected returns for JMT went from a negative value (pre-crisis) to a positive value (post-crisis), while for SON there was a decline in the alpha value.<br>O objetivo deste estudo é estimar o CAPM para as duas empresas de distribuição portuguesas que estão listadas no PSI-20 (JMT e SON) e avaliarmos como é que elas evoluem em relação ao índice de mercado português. Este trabalho abrangeu um período de dezasseis anos (pré e pós-crise do subprime) e, com base nos resultados das estimativas, fizemos uma comparação entre a relação de cada empresa com o PSI-20. Posteriormente analisámos as diferenças entre o antes e o após da crise financeira de 2008. Para isso, estimámos os coeficientes α e β através do método OLS e a adequação do modelo foi verificada através da significância estatística dos coeficientes da regressão e do cumprimento das hipóteses do método. Por fim, a principal conclusão é que as duas empresas tendem a comportar-se de maneira diferente em relação ao índice de mercado português. Todas as estimativas do beta são estatisticamente significativas, o que significa que as mudanças na rendibilidade do PSI-20 influenciam as mudanças nos retornos de cada empresa, o que está alinhado com o CAPM. No entanto, com exceção de dois períodos para a JMT, as estimativas para o alfa são estatisticamente significativas, o que significa que, além do prémio de risco de mercado, há outros fatores que explicam o valor esperado dos retornos em excesso. Também pudemos observar que os retornos esperados para a JMT passaram de um valor negativo (pré-crise) para um valor positivo (pós-crise), enquanto para a SON houve um declínio no valor de alfa.

The theme of my diploma thesis is the engagement of the volunteers in the solution to the accidents in the South-Moravia region. In my diploma thesis I am involved in the issue of the engagement of the volunteers in the solution to the accidents in the South-Moravia region. I assume that the utilization of the potential of the volunteers is one of the possibilities of the acquisition of the forces, which could be used for the recovery of the consequences, post-traumatic care to struck persons and other activities within the solution to the accidents, all parallelly with the actions of the professional teams of the integrated rescue system bodies. The needs of the population in case of the accidents are rather differentiated, and the engagement of the volunteers completes the appointed forces and means of the integrated rescue system bodies. At present time, the adequate legal framework, modifying the engagement of the volunteers in the solution to the accidents, does not exist in the Czech Republic. Non-governmental non-profit organizations are united in the South-Moravia region into the Panel of the South-Moravia Region, which establishes the platform and enables the South-Moravia Region more effective engagement of the non-governmental non-profit organizations. The volunteers, organized in the Panel of the South-Moravia Region, are engaged in the solution to the accidents and the trainings organized in the level of the region, municipalities with widened competence and the integrated rescue system bodies.