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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.
1

CHALLENGES AND OPPORTUNITIES FOR SOURCE WATER PROTECTION PLAN IMPLEMENTATION IN SASKATCHEWAN: LESSONS FOR CAPACITY BUILDING

2013 October 1900 (has links)
Source water protection (SWP) is defined as a land use management and planning process aimed at the protection of surface and groundwater sources from contamination. Currently in Saskatchewan, the Water Security Agency is leading much of the planning and management with the goal of safe drinking water sources and reliable water supplies. The Water Security Agency has developed SWP planning initiatives across the southern portion of the province. Rates of SWP plan implementation in Saskatchewan are uneven and dependent on multiple factors. Using document review and key informant interviews, this study identifies factors facilitating and constraining source water protection plan implementation in selected areas and describes capacity building needs for SWP plans implementation in Saskatchewan. Results are discussed based on four capacity areas: financial, institutional, technical and social capacity. The results in this study show that capacity areas in need of improvement include stable financial resources, training opportunities for local watershed groups, public awareness, adequate stakeholder involvement, SWP plan re-evaluation, and information/data access. The result of this research contributes to the understanding of SWP plan implementation relating to capacity building needs at the watershed scale in the prairie region.
2

Measurement of black hole masses in active Galactic Nuclei

Onken, Christopher Alan 12 September 2005 (has links)
No description available.
3

Development of high performance hardware architectures for multimedia applications

Khan, Shafqat 29 September 2010 (has links) (PDF)
Les besoins en puissance de calcul des processeurs sont en constante augmentation en raison de l'importance croissante des applications multimédia dans la vie courante. Ces applications requièrent de nombreux calculs avec des données de faible précision généralement issues des pixels. Le moyen le plus efficace pour exploiter le parallélisme de données de ces applications est le parallélisme dit de sous-mots (SWP pour \textit{subword parallelism}). Les opérations sont effectuées en parallèle sur des données de faible précision regroupées ce qui permet d'utiliser au mieux les ressources disponibles dimensionnées pour traiter des mots. Dans cette thèse, la conception de différents opérateurs SWP pour les applications multimédia est proposée. Une bonne adéquation entre largeur des sous-mots et largeur des données manipulées permet une meilleure utilisation des ressources et conduit ainsi à améliorer l'efficacité de l'exécution de l'application sur le processeur. Les opérateurs arithmétiques de base développés sont ensuite utilisés dans un opérateur SWP reconfigurable. Ce dernier peut être configuré pour effectuer diverses opérations multimédia avec différentes largeurs de données. L'opérateur reconfigurable peut être utilisé comme unité spécialisée ou comme co-processeur dans un processeur multimédia afin d'en améliorer les performances. La vitesse interne des différentes unités de traitement est également améliorée en représentant les nombres en système redondant plutôt qu'en système binaire. Le système redondant permet entre autre d'augmenter la vitesse des opérations arithmétiques en évitant une propagation de retenue couteuse lors d'opérations d'addition. Les résultats obtenus montrent l'intérêt en terme de performances d'utiliser des opérateurs SWP lors de l'exécution d'applications multimédia.
4

Feature Engineering and Machine Learning for Driver Sleepiness Detection

Keelan, Oliver, Mårtensson, Henrik January 2017 (has links)
Falling asleep while operating a moving vehicle is a contributing factor to the statistics of road related accidents. It has been estimated that 20% of all accidents where a vehicle has been involved are due to sleepiness behind the wheel. To prevent accidents and to save lives are of uttermost importance. In this thesis, given the world’s largest dataset of driver participants, two methods of evaluating driver sleepiness have been evaluated. The first method was based on the creation of epochs from lane departures and KSS, whilst the second method was based solely on the creation of epochs based on KSS. From the epochs, a number of features were extracted from both physiological signals and the car’s controller area network. The most important features were selected via a feature selection step, using sequential forward floating selection. The selected features were trained and evaluated on linear SVM, Gaussian SVM, KNN, random forest and adaboost. The random forest classifier was chosen in all cases when classifying previously unseen data.The results shows that method 1 was prone to overfit. Method 2 proved to be considerably better, and did not suffer from overfitting. The test results regarding method 2 were as follows; sensitivity = 80.3%, specificity = 96.3% and accuracy = 93.5%.The most prominent features overall were found in the EEG and EOG domain together with the sleep/wake predictor feature. However indications have been made that complexities might contribute to the detection of sleepiness as well, especially the Higuchi’s fractal dimension.

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