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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.
271

Provider recommendation based on client-perceived performance

Thio, Niko January 2009 (has links)
In recent years the service-oriented design paradigm has enabled applications to be built by incorporating third party services. With the increasing popularity of this new paradigm, many companies and organizations have started to adopt this technology, which has resulted in an increase of the number and variety of third party providers. With the vast improvement of global networking infrastructure, a large number of providers offer their services for worldwide clients. As a result, clients are often presented with a number of providers that offer services with the same or similar functionalities, but differ in terms of non-functional attributes (or Quality of Service – QoS), such as performance. In this environment, the role of provider recommendation has become more important - in assisting clients in choosing the provider that meets their QoS requirement. / In this thesis we focus on provider recommendation based on one of the most important QoS attributes – performance. Specifically, we investigate client-perceived performance, which is the application-level performance measured at the client-side every time the client invokes the service. This performance metric has the advantage of accurately representing client experience, compared to the widely used server-side metrics in the current frameworks (e.g. Service Level Agreement or SLA in Web Services context). As a result, provider recommendation based on this metric will be favourable from the client’s point of view. / In this thesis we address two key research challenges related to provider recommendation based on client-perceived performance - performance assessment and performance prediction. We begin by identifying heterogeneity factors that affect client-perceived performance among clients in a global Internet environment. We then perform extensive real-world experiments to evaluate the significance of each factor to the client-perceived performance. / From our finding on heterogeneity factors, we then develop a performance estimation technique to address performance assessment for cases where direct measurements are unavailable. This technique is based on the generalization concept, i.e. estimating performance based on the measurement gathered by similar clients. A two-stage grouping scheme based on the heterogeneity factors we identified earlier is proposed to address the problem of determining client similarity. We then develop an estimation algorithm and validate it using synthetic data, as well as real world datasets. / With regard to performance prediction, we focus on the medium-term prediction aspect to address the needs of the emerging technology requirements: distinguishing providers based on medium-term (e.g. one to seven days) performance. Such applications are found when the providers require subscription from their clients to access the service. Another situation where the medium-term prediction is important is in temporal-aware selection: the providers need to be differentiated, based on the expected performance of a particular time interval (e.g. during business hours). We investigate the applicability of classical time series prediction methods: ARIMA and exponential smoothing, as well as their seasonal counterparts – seasonal ARIMA and Holt-Winters. Our results show that these existing models lack the ability to capture the important characteristics of client-perceived performance, thus producing poor medium-term prediction. We then develop a medium-term prediction method that is specifically designed to account for the key characteristics of a client-perceived performance series, and to show that our prediction methods produce higher accuracy for medium-term prediction compared to the existing methods. / In order to demonstrate the applicability of our solution in practice, we developed a provider recommendation framework based on client-perceived performance (named PROPPER), which utilizes our findings on performance assessment and prediction. We formulated the recommendation algorithm and evaluated it through a mirror selection case study. It is shown that our framework produces better outcomes in most cases, compared to country-based or geographic distance-based selection schemes, which are the current approach of mirror selection nowadays.
272

Mer än bara konstnär? : Att närma sig en triangelkomposition i begrepp, förutsättning och realitet / More than just an artist? : To approach a triangle composition in concept, precondition and reality.

Björsson, Kerstin January 2008 (has links)
<p>Syftet är att granska relationen mellan konstnären och marknaden. Flertalet frågor behandlas, såsom om konsten och konstnärer står inför ett paradigmskifte, varför det är fult att säga konst och pengar i samma mening och vad verksamma konstnärer tycker om situationen.</p><p>Uppsatsen redogör för begreppet konstnär ur ett historisk och sociologiskt perspektiv. Förutsättningar för konstnären gås igenom med fokus på kulturpolitiken från 1974 tills idag, och marknaden. Fyra konstnärer har intervjuats för att skapa en bild av den realiteten som de verkar i, hur de ser på konstnärskapet och den bästa av världar.</p> / <p>The purpose is to study the relationship between the artist and the market. Several questions are dealt with, such as does art and artists stand before a paradigm shift, why's it a bad thing to mention art and money together and what do the working artist think about the situation.</p><p>The thesis deals with concept of the artist from a historical and sociological point of view. Preconditions for artists are clarified with a focus on cultural policies from 1974 and onwards. Four artists have been interviewed to create a picture of the working reality, what they think about their artistry and what the best of worlds look like.</p>
273

A new paradigm of industrial organization : The diffusion of technological and managerial innovations in the Brazilian industry

Gitahy, Leda January 2000 (has links)
<p>Based on the concepts of <i>techno-economic paradigm, network</i> and <i>production chain</i>, the main purpose of this dissertation is to analyse the diffusion of technological and managerial innovations in the Brazilian industry during the 1980s and the 1990s. It consists of a summary and six selected papers. Empirical studies were conducted at different moments of the re-structuring process and at different points of the production chain. The samples cover large leading firms as well as small second and third-tier suppliers in the automotive and footwear industries. They throw light on the process of diffusion and establishment of a new paradigm of industrial organization, mostly in conflict with the Taylorist/Fordist.</p><p>Ideas, methods and management techniques were largely adopted and imitated from the so-called "Japanese model", but the diffusion of the new paradigm in Brazil is also the result of adapting and modifying this model by trial and error. At the firm level, the adoption of these innovations entails a highly complex process of social change, reversing norms and models of behaviour hitherto dominant. They modify the daily practices at work, and the division of labour within and between companies, as well as between companies and other institutions, such as those within the educational system. These transformations are studied by distinguishing <i>competition, management</i>, and technological patterns.</p><p>The results show that, under the conditions of a an extremely large domestic market, the re-structuring of the Brazilian industry occurs in a context characterized by crisis, economic instability, recession and unemployment as well as by political re-democratization and growing influence of the labour movement. The diffusion of the new paradigm of efficiency together with the increasing globalization of the economy and the ongoing abandonment of import substitution, transformed the organization of work and <i>inter-firms relations</i>, changing the volume, structure, and location of employment as well as the content and hierarchy of skills.</p>
274

Minding the gaps inflectional defectiveness in a paradigmatic theory /

Sims, Andrea D. January 2006 (has links)
Thesis (Ph. D.)--Ohio State University, 2006. / Full text release at OhioLINK's ETD Center delayed at author's request
275

Microsaccadic Inhibition and P300 Enhancement in a Visual Oddball Task

Valsecchi, Matteo, Dimigen, Olaf, Kliegl, Reinhold, Sommer, Werner, Turatto, Massimo January 2009 (has links)
It has recently been demonstrated that the presentation of a rare target in a visual oddball paradigm induces a prolonged inhibition of microsaccades. In the field of electrophysiology, the amplitude of the P300 component in event-related potentials (ERP) has been shown to be sensitive to the stimulus category (target vs. non target) of the eliciting stimulus, its overall probability, and the preceding stimulus sequence. In the present study we further specify the functional underpinnings of the prolonged microsaccadic inhibition in the visual oddball task, showing that the stimulus category, the frequency of a stimulus and the preceding stimulus sequence influence microsaccade rate. Furthermore, by co-recording ERPs and eye-movements, we were able to demonstrate that, despite being largely sensitive to the same experimental manipulation, the amplitude of P300 and the microsaccadic inhibition predict each other very weakly, and thus constitute two independent measures of the brain’s response to rare targets in the visual oddball paradigm.
276

A new paradigm of industrial organization : The diffusion of technological and managerial innovations in the Brazilian industry

Gitahy, Leda January 2000 (has links)
Based on the concepts of techno-economic paradigm, network and production chain, the main purpose of this dissertation is to analyse the diffusion of technological and managerial innovations in the Brazilian industry during the 1980s and the 1990s. It consists of a summary and six selected papers. Empirical studies were conducted at different moments of the re-structuring process and at different points of the production chain. The samples cover large leading firms as well as small second and third-tier suppliers in the automotive and footwear industries. They throw light on the process of diffusion and establishment of a new paradigm of industrial organization, mostly in conflict with the Taylorist/Fordist. Ideas, methods and management techniques were largely adopted and imitated from the so-called "Japanese model", but the diffusion of the new paradigm in Brazil is also the result of adapting and modifying this model by trial and error. At the firm level, the adoption of these innovations entails a highly complex process of social change, reversing norms and models of behaviour hitherto dominant. They modify the daily practices at work, and the division of labour within and between companies, as well as between companies and other institutions, such as those within the educational system. These transformations are studied by distinguishing competition, management, and technological patterns. The results show that, under the conditions of a an extremely large domestic market, the re-structuring of the Brazilian industry occurs in a context characterized by crisis, economic instability, recession and unemployment as well as by political re-democratization and growing influence of the labour movement. The diffusion of the new paradigm of efficiency together with the increasing globalization of the economy and the ongoing abandonment of import substitution, transformed the organization of work and inter-firms relations, changing the volume, structure, and location of employment as well as the content and hierarchy of skills.
277

Foreign Direct Investment in Sub-Saharan Africa : The Importance of Institutional Settings

Olsson, Therése, Strömwall, Richard January 2009 (has links)
No description available.
278

To Lead or to Follow? : A case study of an internationalization process

Kaukonen, Ulla, Haapanen, Heta-Liisa January 2008 (has links)
This Bachelor thesis studies the internationalization strategy of a Finnish label stock company, UPM Raflatac, in China during the late 1990’s. The purpose of this descriptive study is to facilitate the understanding of companies’ internationalization processes. This was done by studying UPM Raflatac’s internationalization strategy’s connection to the internationalization theories of the Uppsala model and the eclectic paradigm. The findings were established by presenting an Internet based questionnaire for the employees of the company. The results showed that the company did not have a country specific strategy and that the resemblance to the reference material was therefore limited.
279

Location-Specific Determinants Of FDI : The Case Of The Middle East And North Africa Countries

Smajlovic, Lejla, Kozlova, Marina January 2008 (has links)
The thesis examines the foreign direct investment (FDI) inflows in the Middle East and North Africa (MENA) region and, in order to achieve a better understanding of how MENA economies may attract FDI, attempts to identify their possible location-specific de-terminants. The analysis is based on the results of the cross-section OLS regression meth-od. The examined empirical model is based on the eclectic theory developed by John Dun-ning and the previous empirical studies. To test the relevant location-specific determinants of FDI inflows into MENA region, eighteen countries are sampled for the period 1996-2006. The results of the regression analysis show that physical infrastructure and trade openness are significant determinants of FDI in the MENA countries.
280

Fracture Resistance of Non-metallic Molar Crowns Manufactured with CEREC 3D

Madani, Dalia 06 April 2010 (has links)
Objectives: To compare fracture strength and fatigue resistance of ceramic (ProCAD, Ivoclar-Vivadent)(C) and resin composite (Paradigm MZ100, 3M/ ESPE)(R) crowns made with CEREC-3D. Methods: A prepared ivorine molar tooth was duplicated to produce 40 identical prepared specimens made of epoxy resin (Viade). Twenty (C) crowns and 20 (R) were cemented to their dies using resin cement. Ten of each group were subjected to compressive loading to fracture. The remaining 10 of each group were subjected to mechanical cyclic loading for 500,000 cycles. The survivors were subjected to compressive loading to fracture. Results: No significant difference in mean fracture load was found between the two materials. However, only 30% of the (C) crowns vs. 100% of the (R) crowns survived the cyclic loading test. Conclusions: (R) crowns demonstrated higher fatigue Resistance than (C) crowns in-vitro and might better resist cracking in-vivo.

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