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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Formação de agregados óleo-material particulado em suspensão em zona de manguezal e sua contribuição na dispersão do óleo em zonas impactadas por petróleo: estudo de caso em modelos de manguezal em meso-escala.

Trindade, Maria Clara de Luna Freire 16 December 2014 (has links)
Submitted by Gisele Mara Hadlich (gisele@ufba.br) on 2018-07-03T14:56:37Z No. of bitstreams: 1 Maria Clara - Mestrado 4a Correção.pdf: 2433924 bytes, checksum: 0bc684f24c6e9222d87d14005c1931c4 (MD5) / Made available in DSpace on 2018-07-03T14:56:37Z (GMT). No. of bitstreams: 1 Maria Clara - Mestrado 4a Correção.pdf: 2433924 bytes, checksum: 0bc684f24c6e9222d87d14005c1931c4 (MD5) / Agregados óleo material particulado em suspensão (MPS) (oil suspended particulate matter aggregates – OSA, sigla em inglês) são formações microscópicas compostas de fases distintas de óleo e MPS, formados em meio aquoso. Foi proposto que a sua formação tem um papel central na remoção natural de derramamentos de óleo causados pela indústria petrolífera, na coluna d’água ou no sedimento, principalmente em ambientes de baixa energia hidrodinâmica, como em áreas de manguezal. A interação entre o óleo e o MPS depende de fatores como: salinidade da água, tipo de MPS, característica do óleo e energia hidrodinâmica; esses fatores devem ser levados em consideração antes de usá-lo como uma resposta de remediação. O presente trabalho desenvolveu unidades de simulação de manguezal para verificar a formação de agregados óleo-MPS nesse tipo de ambiente. Para tanto foram realizados derramamentos de petróleo nas unidades de simulação, a simulação teve 15 dias de duração. Neste modelo foi simulado um regime de maré diurno, sendo coletadas amostras de água, sedimento, OSA e óleo durante o experimento. Nestas amostras foram determinados: para o sedimento – granulometria, mineralogia, carbono orgânico total, fósforo e hidrocarbonetos totais de petróleo (HTP); para a água e material particulado em suspensão foi determinado HTP; para o óleo o perfil cromatográfico pré e pós experimento e para o OSA foram identificados os tipos formados e sua concentração ao longo do tempo. Análises estatísticas foram aplicadas para compreender melhor como alguns parâmetros físicos e químicos do sedimento influenciam na formação do OSA e como o OSA influencia na distribuição do HTP. Os sedimentos tinham em média 30% da sua granulometria nas frações silte e argila, a caracterização mineralógica identificou à presença de argilominerais. Os níveis de matéria orgânica encontrados foram entre 3,5% e 5, e esta apresentou uma correlação positiva com a quantidade de OSA formado. Os valores do fósforo quase não se alteraram durante o experimento demonstrando que o fósforo não será um nutriente limitante na degradação do petróleo. Ocorreu uma redução dos hidrocarbonetos totais de petróleo de 35% nas unidades de simulação e de 13% no branco mostrando que a formação dos agregados possivelmente acelerou a degradação do óleo. A visualização no microscópio possibilitou verificar a formação do OSA durante todo o período experimental, e identificou-se o OSA do tipo amorfo e do tipo gotícula. O OSA foi mais abundante nas marés baixas e na superfície da coluna d’água. E a formação do OSA teve correlação negativa com a quantidade de HTP dissolvido na água. Os sedimentos utilizado possuem boas características para a formação natural dos agregados óleo material particulado em suspensão, e esta contribui para a dispersão do óleo.
22

Účetní a daňové souvislosti transformace obchodních korporací / Accounting and tax consequences of the transformations of companies

Hošek, Petr January 2015 (has links)
The aim of this thesis is on the base of accounting and tax treatment of corporate transformations modeled timelines for each phase of transformation, respectively. merger and spin-off, and test their functionality on the practical example. For the purpose of accomplish this goal was done, especially in the first two parts, the analysis of individual Czech and European professional publications and articles, as well as Czech and European legislation and judicature. For the next parts it was also used comparison of accounting and tax treatment of transformation, respectively. merger and spin-off, modeling timelines for each phase of transformation and their testing on practical example for the purpose of verification of functionality. The conclusion evaluates the usability of modeled timelines for practice.
23

Practice Assessment for Adoption of the STOP-Bang Screening Tool

Rosenfield, Scott Patrick, Rosenfield, Scott Patrick January 2017 (has links)
Patients undergoing surgery with unrecognized obstructive sleep apnea (OSA) are at greater risk of complications. Ninety percent of those affected in the United States remain undiagnosed. To improve identification, screening tools such as the STOP-Bang questionnaire (Chung et al. 2008), provide anesthesia providers a method of detecting undiagnosed OSA. The purpose of this study is to assess anesthesia providers' practice of preoperative screening for OSA. An email survey was conducted at a Level-III trauma center in Phoenix, Arizona. The survey consisted of a 13 question, 5-point Likert scale questionnaire. It was sent to 29 Certified Registered Nurse Anesthetists (CRNA). A total of 8 CRNA's responded. Respondents were either neutral or disagreed that current methods of OSA screening works well and generally agree that the STOP-Bang tool would provide an advantage over the current methods, accurately detect OSA, and inform their anesthetic plan over current methods. Respondents leaned towards strong agreement that improving the recognition of undiagnosed OSA is needed. However, they were generally neutral on agreement that the STOP-Bang is necessary at their facility. Respondents agreed that the STOP-Bang tool is easy to use and interpret. However, most agreed that integrating the tool would add complexity to the preanesthesia evaluation but they remained neutral on whether it would add significant time to this process. Respondents were neutral on their observations that the STOP-Bang tool would improve early detection of OSA or reduce perianesthesia complications. Just 25% of respondents reported being aware of the existence of the STOP-Bang tool and none reported having used it. In conclusion, this project demonstrates that some providers have not used the STOP-Bang screening tool to detect undiagnosed OSA, but agree this tool is preferred over their current method. Results from the survey brought insight to a potential quality improvement strategy related to improving the perianesthesia care of patients with undiagnosed OSA. Improving knowledge through dissemination of evidence illustrates the value of the STOP-Bang prior to piloting the tool. The rates of perioperative complications justify the implementation of perioperative strategies such as the STOP-Bang as a tool for anesthesia providers.
24

Management péče o dítě s dětskou mozkovou obrnou. / Management of patients with cerebral palsy.

Cihlářová, Kristýna January 2021 (has links)
This thesis is focused on summarising basic knowledge about the diagnosis cerebral palsy (CP), describing the development of an indiviual with CP and on compiling a care plan from birth up to adulthood. In the theoretical part knowledge about historical aspects, risk factors, prevalence, diagnostics, classification and comorbidities of CP is summarized. In the theoretical part are also included the characteristics of each life period of an individual with CP and interventions that are usually indicated during the time, including a comparison with foreign approaches. The practical part is an overview of intervention indications in relation to age compiled from data of patients' medical documentation. These data were processed into a timeline, which is a part of this thesis.
25

Ischemic Feature Identification and Its Relation to Sleep Disordered Breathing in Sleep Heart Health Study Subjects

Mahadevan, Anandi January 2013 (has links)
No description available.
26

Konstrukce paralaktické vidlicové montáže astronomického dalekohledu / Construction of Equatorial Fork Mount

Tůma, Jiří January 2010 (has links)
This master's thesis deals with design of equatorial fork mount for astronomical telescope. The issue of space object watching equipment is deeply analysed. The enclosures of analysis are used in design project. Important aspects are accuracy of motion and high resolution of mount. These parameters are compared with series manufactured equatorial mounts.
27

Vliv mikrobiomu na aktivitu HPA osy / Effect of microbiota on the activity of HPA axis

Fajstová, Alena January 2017 (has links)
Recent research shows, that gut microbiome can influence various functions of the organism and is able to communicate with the brain. The data also show that changes in the composition of gut microbiome can influence behavior and stress reactions and vice versa, psychological state of the organism can cause changes in gut microbiome. The aim of this master's thesis was to examine changes of HPA activation and local metabolism of glucocorticoids caused by stress in the presence or absence of gut microbiome. We therefore used germ-free mice and studied the effect of stress in pituitary, adrenal gland, colon and spleen. We found that, stress has different impact on gene expression in adrenal gland, colon and spleen in the presence or absence of gut microbiome. In contrast, there wasn't any significant effect of stress on pituitary in germ free mice and their conventionaly colonized counterparts.
28

Konstrukce horizontálního frézovacího a vyvrtávacího stroje / Design of horizontal milling and boring machine

Novák, Tomáš January 2014 (has links)
The subject of this diploma thesis is design of motion axes of horizontal milling and boring machines. The first part contains literary research of linear systems of feeding and equipment. The second part contains calculations and the design of the motion machine axis. The 3D model of the motion axis designed in SolidWorks 2010 software and part of drawings are also included in this thesis.
29

Časo-prostorové utváření molekulárních gradientů v časném embryonálním vývoji Xenopus laevis. / Formation of spatio-temporal molecular gradients in early embryonic development of Xenopus laevis.

Šídová, Monika January 2015 (has links)
Clarifying the underlying spatio-temporal mechanisms that determine body pattern is important for detailed understanding of embryonic development. A crucial question of vertebrate embryogenesis remains: when and how are single blastomeres determined for differentiation that subsequently leads to body axes specification and the formation of different tissues and organs? The answer to this question will be beneficial for primary research as well as in the field of applied medicine. The main aim of the presented thesis was to study spatio-temporal molecular gradients of cell fate determinants during early embryonic development. The African clawed frog Xenopus laevis was used as a model organism because of their large size of oocytes and external embryonic development. Due to late activation of embryonic transcription, a crucial mechanism of early blastomeres determination is dependent on asymmetric localization of maternal factors within oocyte and their uneven distribution into single blastomeres during early cell division. Two main localization patterns were identified along the animal-vegetal axis of the mature Xenopus oocyte using qPCR tomography. The localization gradient with preference in either animal or vegetal hemisphere was found for maternal mRNA as well as miRNAs. Moreover, two vegetal...
30

Fysisk kapacitet hos personer med obstruktiv sömnapné, övervikt och låg fysisk aktivitetsnivå : - En jämförande & sambandstudie

Bjernulf, Alfred, Oscar, Kolbe January 2019 (has links)
Bakgrund Obstruktiv sömnapné (OSA) karakteriseras av upprepade episoder av helt eller delvis avstängda luftvägar under sömn. Det saknas studier som undersöker samband mellan fysisk kapacitet och graden av OSA, Body Mass Index (BMI), dagtrötthet, mängden tid med lågintensiv fysisk aktivitet (LFA) och ålder hos personer med OSA.   Syfte Syftet var att se hur fysisk kapacitet skiljer sig hos personer med OSA beroende på graden av OSA, BMI, dagtrötthet, mängden LFA och ålder samt studera sambandet mellan dessa variabler.   Metod Studien var en tvärsnittsstudie med en jämförande och korrelerande design. Data kommer från baslinjemätningar av en randomiserad kontrollerad studie på 86 deltagare med diagnosen OSA (AHI >15), BMI >25, samt en självskattad måttligt intensiv fysisk aktivitet på mindre än 150 minuter/vecka. Dagtrötthet mättes med Epworth sleepiness scale och LFA mättes med accelerometer.    Resultat Det fanns ett signifikant samband mellan prestation på 6 MWT och ålder respektive mängden tid i LFA. Hög ålder och få minuter av LFA korrelerar med kortare gångsträcka. Personer med övervikt hade längre gångsträcka än personer med fetma. Det var inga skillnader i gångsträcka beroende på graden av OSA eller om det förekom dagtrötthet.   Slutsats Ålder och BMI bör tas i beaktande vid utförandet och utvärdering av gångtest för personer med OSA. Personer med OSA som utför mer LFA hade en högre kapacitet vilket möjligen kan förklaras av att de är mindre stillasittande. Mer forskning behövs på ämnet för att ta reda på bakomliggande orsaker och se kausala samband.

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