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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.
541

Zhroucené státy v mezinárodních vztazích na příkladu Afghánistánu / Analysis of the process of ISAF mission in Afghanistan

Roupcová, Martina January 2009 (has links)
This work contains 4 main parts. Firstly, it is focused on application of the concept of failed states and the theoretical point of view. Second part offers 4 theoretical principals concerning with the problem o failed states. In the third part it brings an analysis of the situation in Afghanistan by using Failed state Index. The last part offers case study about Czech mission in Afghanistan.
542

Finanční analýza Pivovaru Svijany, a.s., v komparaci s konkurenčním podnikem / Financial Analysis of Pivovar Svijany, a.s., in Comparison with a Rival Company

Hlaváček, Tomáš January 2013 (has links)
My Master's thesis "Financial Analysis of Pivovar Svijany, a.s., in Comparison with a Rival Company" focuses on assessing the financial situation of the Pivovar Svijany, a.s. company between 2005 and 2011 and comparing it to one of its competitors, Rodinný Pivovar Bernard a.s. The thesis consists of two major parts. The theoretical one outlines the purposes and methods of financial analysis, such as analyses of absolute indicators, relative indicators, working capital, also the pyramidal decomposition of ROE, computation of EVA and finally, solvency and bankruptcy prediction models. The second, practical, part of the thesis uses the discussed knowledge to compare the two aforementioned businesses.
543

Incidence et rémission de l’incontinence urinaire des femmes entre 45 et 60 ans. / Incidence and Remission of Female Urinary Incontinence at Midlife

Legendre, Guillaume 08 December 2016 (has links)
Objectif : L’objectif principal de ce travail était d’évaluer les facteurs de risque d’incidence et de rémission de l’incontinence urinaire (IU) au sein d’une cohorte de femmes de la cinquantaine en prenant en compte le type d’IU (Incontinence urinaire d’effort - IUE -, Incontinence par argenture - IUU- et Incontinence urinaire mixte – IUM) et la gravité des symptômes.Matériel et Méthodes : Les données sont issues des questionnaires de l’enquête « les femmes et leur santé », des questionnaires annuels de la cohorte GAZEL et du questionnaire spécifique « les troubles urinaires » posé en 2000 et 2008. Un modèle de Cox a été utilisé entre 1990 et 2008 à partir des données de la question « Avez-vous des difficultés à retenir vos urines ? ». Des modèles de régression logistiques ont été utilisés entre 2000 et 2008 à partir de la question validée de l’IU « Au cours des 12 derniers mois, vous est-il arrivé d’avoir des fuites involontaires d’urine ? ».Résultats : Au sein de notre population, le taux annuel d’incidence de l’IU est de 5,5 % et le taux annuel de rémission est de 6,2 %, confirmant que l’IU est un phénomène dynamique avec des périodes possibles d’aggravation et d’amélioration partielle ou totale. Ces taux sont variables avec le type d’IU : entre 2000 et 2008, les taux d’incidence étaient respectivement de 14,9 % pour l’IUE, de 3,2 % pour l’IUU et de 3.1% pour l’IUM. L’IUE est le type le plus enclin à connaître une rémission de l’IU en comparaison à l’IUU et l’IUM. Les facteurs associés à l’apparition d’une IU sont des facteurs sociaux (le niveau d’études élevé), obstétricaux (la parité), hormonaux (la ménopause), et en rapport avec l’état de santé, physique ou mentale (la prise de poids, l’apparition de symptômes dépressifs, la dégradation de la qualité de vie - dans les dimensions tonus et isolement social du score NHP). La rémission complète est d’autant moins fréquente que les femmes vieillissent et qu’elles prennent du poids. Pour chaque type d’IU, l’influence des facteurs de risque semble différente. Ainsi, le niveau d’étude (être titulaire du baccalauréat), l’IMC (à l’inclusion, et au cours du suivi) et un syndrome dépressif à l’inclusion sont associés à l’apparition d’une IUE. Un antécédent de prise en charge chirurgicale de l’IU est associé à l’apparition d’une IUU et d’une IUM. La correction chirurgicale de l’IU pendant le suivi est, comme attendu, associée à une rémission des symptômes d’IUE, mais en revanche la rééducation périnéale et un antécédent d’accouchement par voie vaginale, sont associés à une persistance des symptômes d’IUE. L’accouchement par voie vaginale était également associé à la persistance de l’IUM. L’IUU et l’IUM sont les types d’IU les plus graves à l’inclusion. De plus, l’aggravation est plus marquée en cas d’IUU ou d’IUM que d’IUE. Hormis le type, les facteurs associés à une aggravation des symptômes sont une operation pour une IU (à l’inclusion) et l’apparition d’un syndrome dépressif. L’aggravation des symptômes est négativement associée à la consommation d’alcool à l’inclusion et une chirurgie de l’incontinence pendant la période d’étude. Le rôle des facteurs sociaux, comme l’obtention du baccalauréat par exemple, est associé à l’apparition d’un IU légère, alors que des facteurs obstétricaux comme un antécédent d’accouchement par voie basse est associé à une apparition de l’IU grave.Conclusion : L’IU est un phénomène dynamique avec des périodes possibles d’aggravation et d’amélioration partielle ou totale. L’analyse des facteurs de risque associés à l’IU doit intégrer une différentiation du type et de la gravité. Les données concernant l’épidémiologie de l’IU chez les femmes entre 45 et 60 ans sont encore trop peu nombreuses. D'autres enquêtes longitudinales incluant un nombre plus important de femmes sont essentielles afin de confirmer nos résultats et mieux conseiller les femmes en présentant les symptômes. / Objective: The main objective of this work was to evaluate the risk factors of incidence and remission of urinary incontinence (UI) in a cohort of women at midlife, taking into account the type of UI (Stress urinary incontinence - SUI – Urge urinary incontinence – IUU - and mixed urinary incontinence - IUM) and the severity of symptoms.Material and Methods: Data were obtained from the survey questionnaires "women and their health," the annual questionnaires cohort GAZEL and specific questionnaire "urinary problems" posed in 2000 and 2008. A Cox model was used between 1990 and 2008 from the data of the question "Have you trouble holding your urine? ". Logistic regression models were used between 2000 and 2008 from the issue validated UI "Over the last 12 months, did you have any involuntary loss of urine ? ".Results: In our population, the annual rate of incidence of UI was 5.5% and the annual rate of remission was 6.2%, confirming that the UI is a dynamic condition with possible periods of worsening and of improvement. These rates vary with the type of UI: between 2000 and 2008, incidence rates were 14.9% for SUI, 3.2% for UUI and 3.1% for the MUI. SUI is the most likely type to experience a possible remission of the UI compared to UUI and MUI. Factors associated with the occurrence of UI are social factors (high educational level), obstetrical (parity), hormonal (menopause), and factors in relation with physical or mental health status (weight gain, onset of depressive symptoms, impairment in health-related quality of life - energy dimension and social isolation dimension of NHP score). Complete remission is even less common as women gain in age and in weight. For each type of UI, the influence of risk factors seems different. Thus, educational level (baccalaureate), BMI (at baseline and during follow-up) and a depressive syndrome at baseline are associated with the onset of SUI. An antecedent of surgical procedure for UI is associated with the occurrence of UUI and MUI. Surgical correction of the UI during follow-up is, as expected, associated with remission of symptoms of SUI. By contrast, pelvic floor muscle training exercises and vaginal childbirth, are associated with persistence of symptoms of SUI. The vaginal delivery was also associated with the persistence of MUI. MUI and UUI are the more severe types of UI at baseline. Furthermore, the aggravation is more pronounced in case of UUI or MUI that for SUI. Aside from the type, the factors associated with worsening symptoms are a prior surgery for a UI (at baseline) and the onset of a depressive syndrome. A worsening of UI is negatively associated with alcohol consumption at baseline and incontinence surgery during the study period. The role of social factors, such as the baccalaureate for example, is associated with the appearance of a slight UI, while obstetric factors such as a vaginal childbirth is associated with the appearance of a severe UI.Conclusion: The UI is a dynamic condition with possible periods of worsening and of partial or total improvement. The analysis of risk factors associated with the UI must incorporate a differentiation of the type and severity. Data on the epidemiology of UI in women between 45 and 60 years are still too few. Other longitudinal studies including a larger number of women are essential to confirm our results and to better counselling women with UI symptoms.
544

Omnidirectional Photonic Band Gap Using Low Refractive Index Contrast Materials and its Application in Optical Waveguides

Vidal Faez, Angelo 07 1900 (has links)
Researchers have argued for many years that one of the conditions for omnidirectional reflection in a one-dimensional photonic crystal is a strong refractive index contrast between the two constituent dielectric materials. Using numerical simulations and the theory of Anderson localization of light, in this work we demonstrate that an omnidirectional band gap can indeed be created utilizing low refractive index contrast materials when they are arranged in a disordered manner. Moreover, the size of the omnidirectional band gap becomes a controllable parameter, which now depends on the number of layers and not only on the refractive index contrast of the system, as it is widely accepted. This achievement constitutes a major breakthrough in the field since it allows for the development of cheaper and more efficient technologies. Of particular interest is the case of high index contrast one-dimensional photonic crystal fibers, where the propagation losses are mainly due to increased optical scattering from sidewall roughness at the interfaces of high index contrast materials. By using low index contrast materials these losses can be reduced dramatically, while maintaining the confinement capability of the waveguide. This is just one of many applications that could be proven useful for this discovery.
545

Assessment of Silt Density Index (SDI) as Fouling Propensity Parameter in Reverse Osmosis Desalination

Rachman, Rinaldi 07 1900 (has links)
Reverse osmosis operations are facing persistent fouling phenomenon that has challenged the integrity of these processes. Prediction of fouling potential by measuring a fouling index toward feed water is essential to ensure robust operation. Moreover, employing a reliable fouling index with good reproducibility and precision is necessary. Silt density index (SDI) is considered insufficient in terms of reliability and empirical theory, among other limitations. Nevertheless due its simplicity, SDI measurement is utilized extensively in RO desalination systems. The aim of this research is to assess the reliability of SDI. Methods include the investigation of different SDI membranes and study of the nature of the SDI filtration. Results demonstrate the existence of the membrane properties' variation within manufacturers, which then causes a lack of accuracy in fouling risk estimation. The nature of particles during SDI filtration provides information that particle concentration and size play a significant role on SDI quantification with substantial representation given by particles with size close to membrane nominal pore size. Moreover, turbidity assisted SDI measurements along with determination of UF pretreated and clean water fouling potential, establishes the indication of non-fouling related phenomena involved on SDI measurement such as a natural organic matter adsorption and hydrodynamic condition that alters during filtration. Additionally, it was found that the latter affects the sensitivity of SDI by being represented by some portions of SDI value. Keywords: Reverse Osmosis, Fouling index, Particulate Fouling, Silt Density Index (SDI), and Assessment of SDI.
546

Vyhledávání fotografií podle obsahu / Content Based Photo Search

Dvořák, Pavel January 2014 (has links)
This thesis covers design and practical realization of a tool for quick search in large image databases, containing from tens to hundreds of thousands photos, based on image similarity. The proposed technique uses various methods of descriptor extraction, creation of Bag of Words dictionaries and methods of storing image data in PostgreSQL database. Further, experiments with the implemented software were carried out to evaluate the search time effectivity and scaling possibilities of the design solution.
547

Optimalizace procesů ve společnosti / Company Processes Optimization

Lindovská, Kristýna January 2016 (has links)
The diploma thesis is focused on optimization of working processes in Witzenmann Opava by using Value Stream Map. The aim of the thesis is on a basis current status of value stram propose to suitable actions and draw them into new value stream map. The thesis is devided into three parts – theoretical, analytical and proposal part. In the first part of the thesis are compiled theoretical knowledge about lean management sphere, tools for elimination of wastings and theory about mapping value stream by using VSM. Analytical part is deal with characterictic of company Witzenmann Opava, its internal and external factors of developments and implementation of lean production. In this part there is also characteristic of choosed product. Proposal part is deal with value stream analysis of choosed product and specific actions to reduce wasting and getting production more effective with the help of lean production methods.
548

Hodnocení lesní vegetace pomocí časových řad družicových snímků / Evaluation of forest vegetation based on time series of remote sensing data

Laštovička, Josef January 2020 (has links)
Příloha k disertační práci: Abstrakt v AJ (Mgr. Josef Laštovička) Abstract This dissertation thesis deals with the study of forest ecosystems in the central Europe with the time series of multispectral optical satellite data. These forest ecosystems have been influenced by biotic and abiotic disturbances for the last decade. The time series of the satellite data with high spatial resolution allow the detection and analysis of forest disturbances. This thesis is mainly focused primally on free available Landsat and Sentinel-2 data, these two data types were compared. From methods, the difference time series analyses / algorithms were used. The whole thesis can be divided into two main parts. The first one analyses usability of classifiers for detection of forest ecosystems with per-pixel and sub-pixel methods. Specifically, the Neural Network, the Support Vector Machine and the Maximum Likelihood per-pixel classifiers were used and compared for different types of data (for data with high spatial resolution - Landsat or Sentinel-2; very high spatial resolution - WorldView-2) and for classification of protected forest areas. The Support Vector Machine were selected as the most suitable method for forest classifications (with most accurate outputs) from the list of selected per-pixel classifiers. Also, Spectral...
549

Vliv stárnutí populace na spotřební chování domácností

Bayerová, Pavlína January 2018 (has links)
The diploma thesis deals with evaluation of the impact of population aging on consumption behavior of households in the Czech Republic, Germany and Japan. In the paper, we focus on the evaluation of population changes and changes in consumption expenditure and the structure of consumption within the age groups. Then, the impact of population aging on consumption is quantified by re-gression analysis. This is followed by an assessment of the impact of aging on consumer behavior and a proposal for recommendations
550

Výpočet expozičního indexu AOT40 z výsledků měření koncentrací přízemního ozonu pasivními dosimetry / Estimation of exposure index for surface ozone AOT40 from diffusive sampler measurements

Pavlíková, Monika January 2010 (has links)
The study summerizes methods of ozone AOT40 index estimation from time intergarated passive sampler measurements in forests. Ground-level ozone is a highly phytotoxic atmospheric pollutant. In recent years negative impacts of elevated concentrations of ground-level ozone on vegetation and ecosystems have been studied and atmospheric levels of ozone have been measured. There is a noticeable negative impact of elevated concentrations of ground-level ozone on forests in the Czech Republic, mainly in rural areas that are far away from the emission sources. The AOT40F exposure index is a tool to assess the geographical areas with vegetation potentially at risk due to elevated ground-level ozone concentrations. The AOT40 index is the accumulated hourly exposure during daytime hours above cut-off concentration of 40 ppb, during the growing season. Passive samplers are used for measuring ground-level ozone in high spatial resolution. Passive samplers are easy to use. However this metod provides time intergrated values of pollutant concentrations (1-2 weeks). It is not possible to estimate AOT40 index by using just data of mean ozone concentrations over the sampling period. Three methods were used to estimate the exposure index AOT40F for forests by mean ozone concentrations measured in the Jizerské Hory...

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