Learning exercises containing chemical calculations are necessary for complex understanding of some parts of chemical curriculum. This diploma thesis deals with creation and evaluation of worksheets containing multicomponent learning tasks closely connected to reality for pupils of elementary and high school. The theoretical part consists of the summary of present valid Czech curricular documents, mainly parts focused on chemical calculations and sustainable development. The main part of this thesis is creation of worksheets containing multicomponent learning tasks focused on different topics of chemistry which were chosen according to Framework Education Programmes. Created worksheets were verified and evaluated at high school. Based on evaluations of worksheets action research focused on problems during solving chemical calculations was conducted on elementary school.

Doctor of Philosophy / Radiographic film/screen (F/S) images have a narrow latitude or dynamic range. The film’s ability to record and view all the anatomy within the x-ray field is limited by this narrow dynamic range. The advent of digital radiographic means of storing and displaying radiographic images has improved the ability to record and visualise all of the anatomy. The problem still exists in digital radiography (DR) when radiographic examinations of certain anatomical regions are undertaken. In this work, the value of anatomically shaped radiographic contrast-enhancement masks (RCMs) in improving image contrast and reducing the dynamic range of images in DR was examined. Radiographic contrast-enhancement masks are digital masks that alter the radiographic contrast in DR images. The shape of these masks can be altered by the user. Anatomically shaped RCMs have been modelled on tissue compensation filters (TCFs) commonly used in F/S radiographic examinations. The prime purpose of a TCF is to reduce the dynamic range of photons reaching the image receptor and hence improve radiographic contrast in the resultant image. RCMs affect the dynamic range of the image rather than the energy source of the image, that of the x-ray photons. The research consisted of three distinct phases. The first phase was to examine physical TCFs and their effects on F/S radiographic images. Physical TCFs are used in radiographic F/S examinations to attenuate the x-ray beam to compensate for varying patient tissue thicknesses and/or densities. The effect of the TCF is to reduce resultant radiographic optical density variations in the image, allowing the viewer to observe a range of densities within the image which would otherwise not be visualised. Physical TCFs are commonly aluminium- or lead-based materials that attenuate the x-ray beam. A TCF has varying physical thickness to differentially attenuate the iii beam and is shaped for specific anatomical situations. During this project, various commonly used physical TCFs were examined. Measurements of size and thickness were made. Characteristics of linear attenuation coefficients and half-value thicknesses were delineated for various TCF materials and at various energies. The second phase of the research was to model the physical TCFs in a digital environment and apply the RCMs to DR images. The digital RCMs were created with similar characteristics to mimic the shapes to the physical TCFs. The RCM characteristics can be adjusted by the viewer of the image to suit the anatomy being imaged. Anatomically shaped RCMs were designed to assist in overcoming a limitation when viewing digital radiographic images, that of the dynamic range of the image. Anatomically shaped RCMs differ from other means of controlling the dynamic range of a digital radiographic image. It has been shown that RCMs can reduce the range of optical densities within images with a large dynamic range, to facilitate visualisation of all anatomy within the image. Physical TCFs are used within a specific range of radiographic F/S examinations. Digital radiographic images from this range of examinations were collected from various clinical radiological centres. Anatomically shaped RCMs were applied to the images to improve radiographic contrast of the images. The third phase of the research was to ascertain the benefits of the use of RCMs. Various other methods are currently in use to reduce the dynamic range of digital radiographic images. It is generally accepted that these methods also introduce noise into the image and hence reduce image quality. Quantitative comparisons of noise within the image were undertaken. The anatomically shaped RCMs introduced less noise than current methods designed to reduce the dynamic range of digital radiographic images. It was shown that RCM methods do not affect image quality. Radiographers make subjective assessment of digital radiographic image quality as part of their professional practice. To assess the subjective quality of images enhanced with anatomically shaped RCMs, a survey of radiographers and other iv qualified people was undertaken to ascertain any improvement in RCM-modified images compared to the original images. Participants were provided with eight pairs of image to compare. Questions were asked in the survey as to which image had the better range of optical densities; in which image the anatomy was easiest to visualise; which image had the simplest contrast and density manipulation for optimal visualisation; and which image had the overall highest image quality. Responses from 123 participants were received and analysed. The statistical analysis showed a higher preference by radiographers for the digital radiographic images in which the RCMs had been applied. Comparisons were made between anatomical regions and between patient-related factors of size, age and whether pathology was present in the image or not. The conclusion was drawn that digital RCMs correctly applied to digital radiographic images decrease the dynamic range of the image, allowing the entire anatomy to be visualised in one image. Radiographic contrast in the image can be maximised whilst maintaining image quality. Using RCMs in some digital radiographic examinations, radiographers will be able to present optimised images to referring clinicians. It is envisaged that correctly applied RCMs in certain radiographic examinations will enhance radiographic image quality and possibly lead to improved diagnosis from these images.

Doctor of Philosophy / Radiographic film/screen (F/S) images have a narrow latitude or dynamic range. The film’s ability to record and view all the anatomy within the x-ray field is limited by this narrow dynamic range. The advent of digital radiographic means of storing and displaying radiographic images has improved the ability to record and visualise all of the anatomy. The problem still exists in digital radiography (DR) when radiographic examinations of certain anatomical regions are undertaken. In this work, the value of anatomically shaped radiographic contrast-enhancement masks (RCMs) in improving image contrast and reducing the dynamic range of images in DR was examined. Radiographic contrast-enhancement masks are digital masks that alter the radiographic contrast in DR images. The shape of these masks can be altered by the user. Anatomically shaped RCMs have been modelled on tissue compensation filters (TCFs) commonly used in F/S radiographic examinations. The prime purpose of a TCF is to reduce the dynamic range of photons reaching the image receptor and hence improve radiographic contrast in the resultant image. RCMs affect the dynamic range of the image rather than the energy source of the image, that of the x-ray photons. The research consisted of three distinct phases. The first phase was to examine physical TCFs and their effects on F/S radiographic images. Physical TCFs are used in radiographic F/S examinations to attenuate the x-ray beam to compensate for varying patient tissue thicknesses and/or densities. The effect of the TCF is to reduce resultant radiographic optical density variations in the image, allowing the viewer to observe a range of densities within the image which would otherwise not be visualised. Physical TCFs are commonly aluminium- or lead-based materials that attenuate the x-ray beam. A TCF has varying physical thickness to differentially attenuate the iii beam and is shaped for specific anatomical situations. During this project, various commonly used physical TCFs were examined. Measurements of size and thickness were made. Characteristics of linear attenuation coefficients and half-value thicknesses were delineated for various TCF materials and at various energies. The second phase of the research was to model the physical TCFs in a digital environment and apply the RCMs to DR images. The digital RCMs were created with similar characteristics to mimic the shapes to the physical TCFs. The RCM characteristics can be adjusted by the viewer of the image to suit the anatomy being imaged. Anatomically shaped RCMs were designed to assist in overcoming a limitation when viewing digital radiographic images, that of the dynamic range of the image. Anatomically shaped RCMs differ from other means of controlling the dynamic range of a digital radiographic image. It has been shown that RCMs can reduce the range of optical densities within images with a large dynamic range, to facilitate visualisation of all anatomy within the image. Physical TCFs are used within a specific range of radiographic F/S examinations. Digital radiographic images from this range of examinations were collected from various clinical radiological centres. Anatomically shaped RCMs were applied to the images to improve radiographic contrast of the images. The third phase of the research was to ascertain the benefits of the use of RCMs. Various other methods are currently in use to reduce the dynamic range of digital radiographic images. It is generally accepted that these methods also introduce noise into the image and hence reduce image quality. Quantitative comparisons of noise within the image were undertaken. The anatomically shaped RCMs introduced less noise than current methods designed to reduce the dynamic range of digital radiographic images. It was shown that RCM methods do not affect image quality. Radiographers make subjective assessment of digital radiographic image quality as part of their professional practice. To assess the subjective quality of images enhanced with anatomically shaped RCMs, a survey of radiographers and other iv qualified people was undertaken to ascertain any improvement in RCM-modified images compared to the original images. Participants were provided with eight pairs of image to compare. Questions were asked in the survey as to which image had the better range of optical densities; in which image the anatomy was easiest to visualise; which image had the simplest contrast and density manipulation for optimal visualisation; and which image had the overall highest image quality. Responses from 123 participants were received and analysed. The statistical analysis showed a higher preference by radiographers for the digital radiographic images in which the RCMs had been applied. Comparisons were made between anatomical regions and between patient-related factors of size, age and whether pathology was present in the image or not. The conclusion was drawn that digital RCMs correctly applied to digital radiographic images decrease the dynamic range of the image, allowing the entire anatomy to be visualised in one image. Radiographic contrast in the image can be maximised whilst maintaining image quality. Using RCMs in some digital radiographic examinations, radiographers will be able to present optimised images to referring clinicians. It is envisaged that correctly applied RCMs in certain radiographic examinations will enhance radiographic image quality and possibly lead to improved diagnosis from these images.

Tyrimo tikslas – nustatyti pasitenkinimo darbo sąlygomis, saviveiksmingumo ir subjektyviai suvokiamo darbinės veiklos efektyvumo sąsajas bei įvertinti ar pasitenkinimas darbo sąlygomis ir saviveiksmingumas gali prognozuoti subjektyviai suvokiamą darbinės veiklos efektyvumą. Tyrime dalyvavo 204 Kauno ir Vilniaus miestų įmonių įvairių specialybių darbuotojai ( 98 vyrai ir 106 moterys). Tiriamųjų amžiaus vidurkis 29,75 metai. Tiriamieji buvo parinkti patogiosios atrankos būdu. Pasitenkinimui darbo sąlygomis įvertinti buvo sudarytas klausimynas remiantis literatūros apžvalga. Tai vienfaktorinis reiškinys, kuris sudarytas iš 17 klausimų. Saviveiksmingumui nustatyti buvo naudota bendra saviveiksmingumo skalė (The General Self – Efficacy Scale, Jerusalem M. ir Schwarzer R., 1993), kurią sudaro dešimt teiginių. Subjektyviai suvokiamo darbinės veiklos efektyvumas buvo matuojamas dviem aspektais: nedalyvavimo darbinėje veikloje skale (SPS6 scale, Koopman et al., 2002), antrasis aspektas yra neatvykimo į darbą dažnumo indeksas, sudarytas šiam tyrimui doc. Dr. L. Gustainienės ir Talalaitės A. (2012) Tyrimo rezultatai parodė, kad didėjantis pasitenkinimas darbo sąlygomis siejasi su mažėjančiu nedalyvavimu darbinėje veikloje ir nebuvimu darbe. Taip pat didėjant saviveiksmingumui, mažėja nedalyvavimas darbinėje veikloje. Rezultatai parodė, kad moterų imtyje nedalyvavimą darbinėje veikloje ir nebuvimą darbe prognozuoja pasitenkinimas darbo sąlygomis, o vyrų imtyje saviveiksmingumas. / The aim of the study was to assess relationship between the satisfaction with job conditions, self-efficacy and subjective evaluation of work effectiveness. There were 204 employers (106 – women, 98 – men) who participated in the research. The respondents were from Kaunas and Vilnius organizations. The average age of the participants 29,75 years. For the assessment of satisfaction with job condition was made a questionnaire with reference from literature review. The questionnaire consist of 17 propositions. For the assessment of self-efficacy was used The General Self – Efficacy Scale (Jerusalem, M., Schwarzer, R., 1993). Subjective evaluation of work effectiveness was evaluating by two aspects: The first one is a phenomen as being present at work but unable to be fully engaged with the work environment so for the assessment was used Presenteeism Scale (SPS6, Koopman et al., 2002). The second aspect is absenteeism (frequency index of not being at work) – it was made with reference from literature review. Results of a study showed that increasing satisfaction with job conditions correlates with decreasing presenteeism and absenteeism. Moreover, increasing self-efficacy decreases presenteeism. Furthermore, study showed that presenteeism and absenteeism is prognosticated by satisfaction with job conditions in cluster of women and presenteeism and absenteeism is prognosticated by self-efficacy.

Aujourd'hui, les technologies de captation et de restitution sonore se développent dans le but de diffuser des scènes avec un rendu spatialisé. Avant leur diffusion, les extraits sonores peuvent être évalués en terme de qualité par des méthodes recommandées par I'Union lnternationale des Télécommunications (évaluation des codecs de compression, procédés de prise ou restitution sonore...). Cependant, ces standards d'évaluation montrent certaines faiblesses notamment en ce qui concerne les attributs de qualité à évaluer. La dimension spatiale n'est pas prise en compte spécifiquement. Dans ce travail, une méthodologie dédiée à l'évaluation de la qualité de I'audio spatialisé est mise en place notamment pour répondre aux biais identifiés. De par l'utilisation d'une catégorisation libre et d'une analyse multidimensionnelle, vingt-huit attributs ont été catégorisés en trois familles d'attributs : le Timbre, l'Espace et les Défauts. Ces trois attributs généraux ont été inclus dans un test d'écoute. Celui-ci se déroule en deux phases : l'évaluation de la qualité globale suivie de l'évaluation des trois attributs simultanément sur une même interface. Les tests sont réalisés sans référence explicite, le fichier original constitue une référence cachée. De plus, trois signaux audio, dit ancrages, spécifiques à chacun des trois attributs ont été définis puis superposés pour définir un ancrage unique triplement dégradé. La méthode a été testée à la fois sur un système de restitution au casque avec des contenus binauraux mais également sur un système multicanal 5.1. L'évaluation de stimuli de qualité intermédiaire est préconisée ainsi que des contenus présentant un effet spatial prononcé. L'évaluation multicritère a montré son intérêt dans certaines conditions et permet ainsi d'identifier les caractéristiques qui sont dégradées. Les attributs Défauts et Timbre ont montré un poids influant sur la qualité globale tandis que le poids de I'attribut Espace est plus discutable. / Nowadays, recording and restitution technologies focus on a spatial rendering of sound. Before their broadcast, the quality evaluation of sound excerpts is often necessary. Methods recommended by the international telecommunication union denote some weaknesses about sound attributes to be evaluated.For example, spatial dimension is barely taken into account. A methodology dedicated to the assessment of spatial audio quality is proposed in order to avoid some biases. With a free categorization and a multidimensional scaling, 28 attributes were clustered in three families '. Timbre, Space and Defecfs. These three categories were included in a listening test split into two sessions : first, the assessment of overall quality and then, the evaluation of the three categories presented simultaneously on a same interface.Tests were conducted without explicit reference, but, the original version was considered as a hidden reference. Moreover, three specific anchors, each one associated to dedicated categories, were defined and then were mixed to define a unique anchor impaired in three ways. The method was tested on a 5.1 system and on binaural contents with headphone restitution. lntermediate quality of contents is recommended as well as contents with relevant spatial effects. The interest of a multicriteria assessment is to identify which properties of sound are impaired. Linear regression shows that Defecfs and Timbre attributes have influential weight on overall quality while the weight of Space attribute is more dubious.

La presente tesis propone un equipo portátil y ergonómico que permita la captura de imágenes de cultivos de quinua y, mediante un método de procesamiento eficaz, detecte los segmentos donde la planta se encuentra afectada por la enfermedad del Mildiu (representada por un amarillamiento particular sobre las hojas) para así obtener un resultado numérico que represente dicho efecto. La realización de este proyecto resuelve el principal problema del análisis cualitativo en los que se basa el cliente para el diagnóstico de la enfermedad ya que ofrecerá una solución cuantitativa para la identificación y medición de daño en los cultivos que proporcione al agrónomo un dato vital para poder suministrar la dosis adecuada de fungicida a las plantaciones y obtener un producto de mejor calidad. Este trabajo se basa en dos procesos de segmentación: primero, se realizó, a partir de la imagen original capturada, la segmentación de vegetación sobre el entorno mediante el modelo de color L*a*b, histograma bidimensional, filtrado y binarización; y, segundo, se realizó, a partir de la imagen resultante del primer proceso, la segmentación de amarillamiento sobre la vegetación mediante de los modelos de histogramas bidimensionales, filtrado, binarización y propiedades de excentricidad. Para la validación se tomó 50 imágenes de un cultivo de quinua del Instituto Nacional de Innovación Agraria (INIA) - Sede Lima, las cuales fueron procesadas a través del equipo desarrollado y verificado por el agrónomo especialista. Finalmente, se utilizó el índice de Kappa de Cohen para comparar los resultados donde se obtuvo un resultado de 0.789. / This thesis proposes a portable and ergonomic equipment that allows the capture of images of quinoa crops and, through an effective processing method, detect the segments where the plant is affected by Mildew disease (represented by a particular yellowing on the leaves) in order to obtain a numerical result that represents that effect. The realization of this project solves the main problem of the qualitative analysis on which the client is based for the diagnosis of the disease since it will offer a quantitative solution for the identification and measurement of crop damage that provides the agronomist with a vital data to be able to Supply the appropriate dose of herbicide to the plantations and obtain a better quality product. This work is based on two segmentation processes: first, from the original image captured, the segmentation of vegetation over the environment was carried out using the L*a*b color model, two-dimensional histogram, filtering and binarization; and, secondly, from the image resulting from the first process, the segmentation of yellowing on the vegetation was carried out using the two-dimensional histogram, filtering, binarization and eccentricity properties models. For validation, 50 images of a quinoa crop from INIA - Lima Headquarters were taken, which were processed through the equipment developed and verified by the specialist agronomist. Finally, Cohen’s Kappa index was used to compare the results where a result of 0.789 was obtained. / Tesis

Title: The effect of physiotherapy on balance in multiple sclerosis Objectives: The aim of this study is to compare efficacy between ambulatory individual physiotherapy and complex inpatient rehabilitation in people with multiple sclerosis on balance and subjective evaluation of general health. In ambulant program to compare effect of different physiotherapeutic methods (Motoric program activating therapy, Manual physiotherapy correction, Reflex Locomotion according to Vojta). Methods: A combined design of study. Ambulant program has randomised assessor blind design, in which subjects were divided into one of the three groups of ambulatory physiotherapy. A clinical study without control arm design is used in case of comparison between complex and ambulatory program. Results were analysed in 45 patients with multiple sclerosis (25 subjects of ambulatory program, 20 subjects of complex program). Subjects of the ambulatory program were divided into one of the three groups of ambulatory physiotherapy (Motoric program activating therapy, Manual physiotherapy correction, Reflex Locomotion according to Vojta), in which they absolved during two months 20 therapies (2-3 times per week, length 60 minutes). Subjects of complex program underwent complex inpatient rehabilitation with duration about 21 days. The...

[pt] As técnicas de estimação de movimento utilizadas nos padrões de compressão de vídeo proporcionam a utilização mais eficiente dos recursos de transmissão e armazenamento, através da redução do número de bits necessários para representar um sinal de vídeo e da conservação da qualidade do conteúdo que está sendo processado. O objetivo dessa dissertação de Mestrado é propor um novo algoritmo capaz de reduzir a grande complexidade computacional envolvida nestas técnicas, mantendo a qualidade do sinal reconstruído. Dessa maneira, apresenta-se um algoritmo AUMHS (Adaptive Unsymmetrical-cross Multi-Hexagon-grid Search) o qual traz como principais modificações ao algoritmo UMHS (Unsymmetrical-cross Multi-Hexagon-grid Search) a implementação de uma medida de movimento que classifica as cenas de uma seqüência de vídeo de acordo com o movimento detectado para posterior adequação dos parâmetros de estimação de movimento e de outros parâmetros do codificador. Como resultado apresenta-se um ganho expressivo na velocidade de processamento, e conseqüente redução do custo computacional, conservando-se a qualidade obtida pelos principais algoritmos da literatura. O algoritmo foi implementado no codificador do padrão H.264/AVC onde realizou-se análises comparativas de desempenho com os algoritmos UMHS e FSA através da medição de parâmetros como PSNR (Peak Signal to Noise Ratio), tempo de processamento do codificador, tempo de processamento do módulo de estimação de movimento, taxa de bits utilizada e avaliação subjetiva informal. / [en] The motion estimation techniques used by the video compression standards provide an efficient utilization of the transmission and storage resources, through the reduction of the number of bits required to represent a video signal and the conservation of the content quality that is being processed. The objective of this work is to propose a new algorithm capable of reducing the great computational complexity involved in the motion estimation techniques, keeping the quality of the reconstructed signal. In this way, we present an algorithm called AUMHS (Adaptive Unsymmetrical-cross Multi-Hexagon-grid Search) which brings as main modifications relative to the UMHS (Unsymmetrical-cross Multi-Hexagon-grid Search) the implementation of a movement measure that can classify the scenes of a video sequence according to the motion detected for posterior adequacy of the motion estimation and others coder parameters. As result we present an expressive gain in the processing speed, and consequent computational cost reduction, conserving the same quality of the main algorithms published in the literature. The algorithm was implemented in the H.264/AVC coder in order to proceed with comparative analysis of perfomance together with the UMHS and FSA algorithms, measuring parameters as PSNR (Peak Signal you the Noise Ratio), coding processing time, motion estimation time, bit rate, and informal subjective evaluation.

De nombreuses études ont été menées lors des vingt dernières années dans le domaine de l’auralisation.Elles consistent à rendre audible les résultats d’une simulation acoustique. Ces études se sont majoritairementfocalisées sur les algorithmes de propagation et la restitution du champ acoustique dans desenvironnements complexes. Actuellement, de nombreux travaux portent sur le rendu sonore en tempsréel.Cette thèse aborde la problématique du rendu sonore dynamique d’environnements complexes selonquatre axes : la propagation des ondes sonores, le traitement du signal, la perception spatiale du son etl’optimisation informatique. Dans le domaine de la propagation, une méthode permettant d’analyser lavariété des algorithmes présents dans la bibliographie est proposée. A partir de cette méthode d’analyse,deux algorithmes dédiés à la restitution en temps réel des champs spéculaires et diffus ont été extraits.Dans le domaine du traitement du signal, la restitution est réalisée à l’aide d’un algorithme optimisé despatialisation binaurale pour les chemins spéculaires les plus significatifs et un algorithme de convolutionsur carte graphique pour la restitution du champ diffus. Les chemins les plus significatifs sont extraitsgrace à un modèle perceptif basé sur le masquage temporel et spatial des contributions spéculaires.Finalement, l’implémentation de ces algorithmes sur des architectures parallèles récentes en prenant encompte les nouvelles architectures multi-coeurs et les nouvelles cartes graphiques est présenté. / During the past twenty years many studies have been conducted in the field of auralization, which aimsat rendering audible the results of an acoustic simulation. These studies have mainly focused on thepropagation algorithms and the sound field audio rendering for complex environments. Currently, muchresearch concentrates on real-time audio rendering.This thesis addresses the problematic of real-time audio rendering of complex environments accordingto four axes: sound propagation, Digital Signal Processing (DSP), spatial perception of sound andcomputational optimizations. In the field of propagation, a method that aims at analyzing the varietyof existing algorithms is proposed. This method yields two algorithms dedicated to the real-time propagationof both specular and diffuse information. In the field of DSP, the auralization is performed withan efficient binaural spatialization module for the most significant specular information, and a GPUconvolution algorithm for the diffuse sound field auralization. The most significant paths are extractedthanks to a perceptive model based on temporal and spatial masking of the specular contributions.Finally, the implementation of these algorithms on recent computer architectures, taking advantage ofthe parallel processing of the new CPUs, and the benefits of GPUs for DSP calculations is presented.

Noise currently represents a problem in society, which disturbs mainly inhabitants in populated areas. It decreases their quality of life and endangers their health. The sensitivity to noise is individual, yet it is possible to measure noise by various means and evaluate its intensity and impact on human beings. Noise as a part of the environment, is becoming on the basis of resident complaints a discussed matter on the town and city level. Their management of noise necessarily involves monitoring and taking subsequent precautions. This work deals with comparing objective and subjective methods in noise evaluation in urban environments and its impact on the quality of life and the health of the residents. It uses a method of the multicriterial evaluation of variant also known as the multicriterial analysis. It compares four approaches to evaluate noise; two objective involving measuring, one subjective using a survey method and one hybrid. The winning method represents the subjective evaluation, which has fulfilled given criteria and acquired a significance of 75 %. All variants included in the analysis are suitable for noise evaluation in outdoor environments on a local level. The outcome of this work is to recommend towns and cities in the Czech Republic to use the winning compromising variant,...