• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 1470
  • 517
  • 492
  • 327
  • 219
  • 181
  • 144
  • 31
  • 30
  • 24
  • 23
  • 23
  • 18
  • 18
  • 17
  • Tagged with
  • 4188
  • 414
  • 395
  • 378
  • 367
  • 359
  • 354
  • 329
  • 315
  • 308
  • 304
  • 299
  • 293
  • 288
  • 287
  • 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.
621

Analyse d’un groupe de dépôts de l’helladique ancien II final, au lac Vouliagméni, Perakhoŕa, Grèce centrale

Morin, Jacques, 1954- January 1983 (has links)
The goal of the present study is the description and analysis of the material found on the E. H. II site (Area A) situated near Lake Vouliagméni on the Perakhora peninsula. The study includes a description of the stratigraphy and architecture of the site and of the material (ceramics, lithics) found in the building. For the analysis of the material, statistics were widely used to give more precision to the descriptions. The objects were also compared to contemporaneous material. The conclusion consist of a functional analysis of each of the rooms of the building. / La présente étude a pour but de décrire et d’analyser le matériel retrouvé sur le site H. A. II (secteur A) situé près du lac Vouliagméni, dans la péninsule de Perakhora. L’ étude comprend une description de la stratigraphie et de l’architecture du site, ainsi que du matériel (céramique, lithique) contenu dans l’édifice. Au cours de l’analyse du matériel, on a fait un abondant usage des statistiques afin de donner plus de précision aux descriptions. Les objets ont aussi été mis en parallèle avec leurs contemporains. La conclusion consiste en une analyse fonctionnelle de chacune des pièces de l’édifice découvert.
622

Modeling environmental factors affecting the growth of eucalypt clones.

January 2009 (has links)
Tree growth is influenced by environment and genetic factors. The same tree growing in different areas will have different growth patterns. Trees with different genetic material, e.g. pine and Eucalyptus trees, growing under the same environmental conditions have different growth patterns. Plantation trees in South Africa are mainly used for pulp and paper production. Growth is an important economic factor in the pulp and paper industry. Plantations with fast growth will be available for processing earlier compared to a slow growth plantation. Consequently, it is important to understand the role played by environmental factors, especially climatic factors, on tree growth. This thesis investigated the climatic effects on the radial growth of two Eucalyptus clones using growth data collected daily over five years by Sappi. The general linear model and the time series models were used to assess the effects of climate on radial growth of the two clones. It was found that the two clones have similar overall growth patterns over time, but differ in growth rates. The growth pattern of the two clones appears to be characterized by substantial jumps/changes in growth rates over time. The times at which the jumps/changes in growth rate occur are referred to as the “breakpoints”. The piecewise linear regression model was used to estimate when the breakpoints occur. After estimating the breakpoints, the climatic effects associated with these breakpoints were investigated. The linear and time series modeling results indicated that the contribution of climatic factors on radial growth of Eucalyptus clones was small. Most of the variation in radial growth was explained by the age of the trees. Consequently, this thesis also investigated the appropriate functional relationship between radial growth and age. In particular, this nonlinear growth models were used to model the radial growth process. The investigated growth curve models were those which included the maximum radius and the age at which the radial growth rate is largest as some of the parameters. The maximum growth rate was calculated from the estimated model of each clone. The results indicated that the two clones reach the maximum growth rate at different times. In particular, the two clones reach the maximum growth rates at around 368 and 376 days, respectively. Furthermore, the maximum radius was found to be different for the two clones. / Thesis (M.Sc.)-University of KwaZulu-Natal, Pietermaritzburg, 2009.
623

Analysis of intrasite artifact spatial distributions : the Draper site smoking pipes

Von Gernet, Alexander D. January 1982 (has links)
No description available.
624

Évaluation des facteurs de risque d'infection du site opératoire en chirurgie mammaire

Boileau, Jean-François January 2006 (has links)
Mémoire numérisé par la Division de la gestion de documents et des archives de l'Université de Montréal
625

Computational Prediction of Transposon Insertion Sites

Ayat, Maryam 04 April 2013 (has links)
Transposons are DNA segments that can move or transpose themselves to new positions within the genome of an organism. Biologists need to predict preferred insertion sites of transposons to devise strategies in functional genomics and gene therapy studies. It has been found that the deformability property of the local DNA structure of the integration sites, called Vstep, is of significant importance in the target-site selection process. We considered the Vstep profiles of insertion sites and developed predictors based on Artificial Neural Networks (ANN) and Support Vector Machines (SVM). We trained our ANN and SVM predictors with the Sleeping Beauty transposonal data, and used them for identifying preferred individual insertion sites (each 12bp in length) and regions (each 100bp in length). Running a five-fold cross-validation showed that (1) Both ANN and SVM predictors are more successful in recognizing preferred regions than preferred individual sites; (2) Both ANN and SVM predictors have excellent performance in finding the most preferred regions (more than 90% sensitivity and specificity); and (3) The SVM predictor outperforms the ANN predictor in recognizing preferred individual sites and regions. The SVM has 83% sensitivity and 72% specificity in identifying preferred individual insertion sites, and 85% sensitivity and 90% specificity in recognizing preferred insertion regions.
626

Surfacing: a guide for approaching landscape

Kennedy, Andrea C. 21 January 2008 (has links)
This work is a compilation of ideas intended as a framework for an alternative approach to engaging ‘site’ in the design process, an approach that maintains and explores the complexities and subtleties of a landscape, of a place. Through two parallel explorations - one that considers an expanded and inclusive interpretation of landscape as the frame through which we engage with, and design, our surroundings, and one that examines the specific nature of this engagement as exchange between the self and the milieu - such an approach has been developed. This approach is called RECONNAISSANCE. Through encouragement of explicit, conscious consideration of how we perceive and experience a landscape, how this contributes to an understanding of a particular place and how this relates to and informs the practice of landscape architecture (both the process and the outcome), RECONNAISSANCE contributes to a strengthening of our abilities and actions as landscape architects.
627

Best practices for completing the comparative analysis for a cultural landscape such as the proposed Pimachiowin Aki World Heritage nomination

Didora, Christin 16 September 2010 (has links)
The purpose of this thesis was to develop the best practices for completing a comparative analysis for a cultural landscape World Heritage nomination document. The research focused on existing secondary documents including written reports and nomination documents, as well as experts’ opinions. The two objectives of the research were to complete an examination of the existing World Heritage literature and to establish the best practices to undertake the comparative analysis. A comparative analysis is required to provide comparisons of the nominated site with sites that are on the World Heritage List and those that are not. The material emphasis of the World Heritage Committee review process is challenging for associative cultural landscape nominations. The individuality of each landscape and associated culture is what makes traditional sites unique and challenging to compare to other global sites.
628

Local stakeholders’ perspectives of WHS status: a case study

Du, Jiayun 04 January 2012 (has links)
It is recognized that the World Heritage Site (WHS) status is a strong brand with exceptional quality and excellent reputation that attracts tourists to visit. This study applies and adapts the brand knowledge model to examine local stakeholders’ understanding of the WHS status as a brand. A case study approach was applied and a WHS in China was selected as the case. In total, 13 interviewees from local government, private business owners and residents participated in the study. The study showed that the three local stakeholders were familiar with the WHS status and shared the importance of the WHS status as intended by the WHS program to tourists. However, local stakeholders over emphasized the economic importance of the WHS status, and conservation became a tool to fulfill economic benefits. The results challenged the standpoint of the WHS program and showed that the WHS status was not a strong brand.
629

Kraven på ägare till minireningsverk skiljer sig åt mellan olika kommuner

Stenbacka, Nina January 2015 (has links)
Discharge of inadequately treated waste water containing nutrients such as phosphorus and nitrogen as well as organic matter and bacteria is associated with a risk of eutrophication and contamination. The Swedish government has decided upon several Environmental Quality Objectives aiming to reduce the emissions of nutrients to water bodies. In Sweden, there are between 675 000 to 1 000 000 on-site sewage systems. Recent studies have shown that the function of small sewage treatment plants is in many cases insufficient. To prevent this regular service and supervision by a professional is needed. The focus of this study are small sewage treatment plants which use a technique where mechanical, chemical and/or biological reduction of pollutants is being used in the same facility to reduce nutrients in household wastewater. The aim of the study is to investigate how different municipalities ensure that small sewage treatment plants fulfill the requirements and reduce pollutants as efficient as the manufacturers claim. To do this, a survey was carried out, leading to a data-set that is covering more than 90 municipalities. The results show that many municipalities lack resources to ensure that small sewage treatment plants work properly. Operation and maintenance of the plants is an important issue, and should be given much more attention. Therefore the municipalities should request more documentation from the owners both before and after installation to make sure that the small sewage treatment plant can fulfill the required standard. About half of the municipalities demand that the owners acquire some kind of service agreement with the manufacturer.  If small sewage treatment plants should be a wastewater treatment solution that we can rely on in the future, there is a need of evaluating and analyzing these facilities more systematically.
630

Shear-Wave Velocities and Derivative Mapping For the Upper Mississippi Embayment

Vance, David M. 01 January 2006 (has links)
During the past two decades, University of Kentucky researchers have been acquiring seismic refraction/reflection data, as well as seismic downhole data, for characterizing the seismic velocity models of the soil/sediment overburden in the central United States. The dataset includes densely spaced measurements for urban microzonation studies and coarsely spaced measurements for regional assessments. The 519 measurements and their derivative products often were not in an organized electronic form, however, limiting their accessibility for use by other researchers. In order to make these data more accessible, this project constructed a database using the ArcGIS 9.1 software. The data have been formatted and integrated into a system serving a wider array of users. The seismic shear-wave velocity models collected at various locations are archived with corresponding x-, y-, and z-coordinate information. Flexibility has been included to allow input of additional data in the future (e.g., seismograms, strong ground-motion parameters and time histories, weak-motion waveform data, etc.). Using the completed database, maps of the region showing derivative dynamic site period (DSP) and weighted shear-wave velocity of the upper 30 m of soil (V30) were created using the ArcGIS 9.1 Geostatistical Analyst extension for examination of the distribution of pertinent dynamic properties for seismic hazard assessments. Both geostatistical and deterministic techniques were employed. Interpolation of V30 data yielded inaccurate predictions because of the high lateral variation in soil layer lithology in the Jackson Purchase Region. As a result of the relatively uniform distribution of depths to bedrock, the predictions of DSP values suggested a high degree of accuracy.

Page generated in 0.0309 seconds