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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.
11

Espaces chamaniques en mouvement. Itinéraires vécus et géographies multiples entre Europe et Amérique du Sud.

Mesturini, Silvia 13 September 2010 (has links)
Cette thèse est le résultat d'une étude menée grâce à une enquête de terrain multisituée dans plusieurs pays européens (France, Espagne, Belgique et Pays Bas)et sud-américains (Pérou, Bolivie, Ecuateur,Argentine et Brésil). Il s'agit de mettre en question, de décrire et de comprendre le fonctionnement de certains réseaux transnationaux de praticiens, de sympathisants et d'usagers de pratiques rituelles et de discours étiquetés comme "chamaniques". Les divers terrains sont analysés à partir du paradoxe d'un chamanisme entendu tant comme une sorte de "label" ayant un succés croissant sur le marché thérapeutique et spirituel contemporain qu'en tant que système de prise en charge et de réparation du malheur individuel et collectif ayant une histoire interethnique et interculturelle qui lui est propre et qui témoigne de la capacité d'adaptation et de persistance du système lui-même.
12

The Multi-Site Church Phenomenon in North America: 1950-2010

Frye, Brian Nathaniel 16 May 2011 (has links)
This dissertation examines the development of the multi-site church phenomenon in North America from 1950 to 2010. Chapter 1 introduces the multi-site church concept, briefly detailing the development of the multi-site movement and the need for investigation of the subject. Chapters 2 through 4 explore the historical development of the multi-site church movement, highlighting individuals, ministries, trends, and forces contributing to the current multi-site church phenomenon. Chapter 5 examines the various forms of current multi-site churches presenting a concise and comprehensive taxonomy of multi-site churches in North America. Chapter 6 analyzes key New Testament biblical and theological issues concerning the multi-site church structure, providing a general set of parameters for healthy multi-site application and expression. Chapter 7 summarizes the content and arguments of the dissertation, assessing the strengths, weaknesses, and success of the dissertation, and presenting topics for future multi-site inquiry and investigation. This dissertation contends that the multi-site church concept is a robust and biblically acceptable church model, and one that is beneficial to the church in North America.
13

Efficient Test Methods for RF Transceivers

Erdogan, Erdem Serkan January 2010 (has links)
<p>Advancements of the semiconductor technology opened a new era in</p> <p>wireless communications which led manufacturers to produce faster,</p> <p>more functional devices in much smaller sizes. However, testing</p> <p>these devices of today's technology became much harder and expensive</p> <p>due to the complexity of the devices and the high operating speeds.</p> <p>Moreover, testing these devices becomes more important since decreasing</p> <p>feature sizes increase the probability of parametric and catastrophic</p> <p>faults because of the severe effects of process variations. Manufacturers</p> <p>have to increase their test budgets to address quality and reliability</p> <p>concerns. In the radio frequency (RF) domain, overall test cost are higher</p> <p>due to equipment costs, test development and test time costs. Advanced</p> <p>circuit integration, which integrates various analog and digital circuit</p> <p>blocks into single device, increases test costs further because of the</p> <p>additional tests requiring new test setups with extra test equipments.</p> <p>Today's RF transceiver circuits contain many analog and digital circuit</p> <p>blocks, such as synthesizers, data converters and the analog RF front-end</p> <p>leading to a mixed signal device. Verification of the specifications and</p> <p>functionality of each circuit block and the overall transceiver require</p> <p>RF instrumentation and lengthy test routines. In this dissertation, we</p> <p>propose efficient component and system level test methods for RF</p> <p>transceivers which are low cost alternatives to traditional tests.</p> <p>In the first component level test, we focus on in-band phase noise of the</p> <p>phase locked loops (PLL). Most on-chip self-test methods for PLLs aim at</p> <p>measuring the timing jitter that may require precise reference clocks and/or</p> <p>additional computation of measured specs. We propose a built in test (BiT)</p> <p>circuit to perform a go/no-go test for in-band PLL phase noise. The proposed</p> <p>circuit measures the band-limited noise power at the input of the voltage</p> <p>controlled oscillator (VCO). This noise power is translated as the high</p> <p>frequency in-band phase noise at the output of the PLL. Our circuit contains</p> <p>a self calibration sequence based on a simple sinusoidal input signal to make</p> <p>it robust with respect to process variations.</p> <p>The second component level test is a built in self test (BiST) scheme</p> <p>proposed for analog to digital converters (ADC) based on a linear ramp</p> <p>generator and efficient output analysis. The proposed analysis method is</p> <p>an alternative to histogram based analysis techniques to provide test time</p> <p>improvements, especially when the resources are scarce. In addition to the</p> <p>measurement of differential nonlinearity (DNL) and integral nonlinearity</p> <p>(INL), non-monotonic behavior of the ADC can also be detected with the</p> <p>proposed technique. The proposed ramp generator has a high linearity</p> <p>capable of testing 13-bit ADCs.</p> <p>In the proposed system level test methods, we utilize the loop-back</p> <p>configuration to eliminate the need for an RF instrument. The first loop-back</p> <p>test method, which is proposed for wafer level test of direct conversion</p> <p>transceivers, targets catastrophic and large parametric faults. The use of</p> <p>intermediate frequencies (IF) generates a frequency offset between the transmit</p> <p>and receive paths and prevents a direct loop-back connection. We overcome this</p> <p>problem by expanding the signal bandwidth through saturating the receive path</p> <p>composed of low noise amplifier (LNA) and mixer. Once the dynamic range of the</p> <p>receiver path is determined, complete transceiver can be tested for catastrophic</p> <p>signal path faults by observing the output signal. A frequency spectrum</p> <p>envelope signature technique is proposed to detect large parametric faults.</p> <p>The impact of impairments, such as transmitter receiver in-phase/quadrature</p> <p>(I/Q) gain and phase mismatches on the performance have become severe due to</p> <p>high operational speeds and continuous technology scaling. In the second system</p> <p>level loop-back test method, we present BiST solutions for quadrature modulation</p> <p>transceiver circuits with quadrature phase shift keying (QPSK) and Gaussian</p> <p>minimum shift keying (GMSK) baseband modulation schemes. The BiST methods</p> <p>use only transmitter and receiver baseband signals for test analysis. The</p> <p>mapping between transmitter input signals and receiver output signals are</p> <p>used to extract impairment and nonlinearity parameters separately with the</p> <p>help of signal processing methods and detailed nonlinear system modeling.</p> <p>The last system level test proposed in this dissertation combines the benefits </p> <p>of loop-back and multi-site test approaches. In this test method, we present </p> <p>a 2x-site test solution for RF transceivers. We perform all operations on </p> <p>communication standard-compliant signal packets, thereby putting the device </p> <p>under the normal operating conditions. The transmitter on one device under </p> <p>test (DUT) is coupled with a receiver on another DUT to form a complete TX-RX </p> <p>path. Parameters of the two devices are decoupled from one another by carefully </p> <p>modeling the system into a known format and using signal processing techniques.</p> / Dissertation
14

The impact of fidelity and innovations on Healthy Families America programs

Nixon, Ashley E 01 June 2007 (has links)
Fidelity to a program model and innovations added to the program model have been found to positively impact large scale program expansion and implementation (Blakely et al., 1987). Research examining the effectiveness of Healthy Families America (HFA) programs has been hindered by the differences that exist among HFA programs. This study examines the impact program fidelity and innovations have on outcome measures of updated immunizations, primary medical care providers, and participant retention for 102 HFA sites. Factor analysis and regression were used to analyze archival data. Results indicate that fidelity was positively related to percentage of participants with updated immunizations and primary medical care providers. Innovations, specifically additional services offered to participants and additional training opportunities for HFA staff, had positive relationships with participant retention.
15

Proposition et étude d'une extension du RCPSP pour la Mutualisation entre plusieurs sites : définition, formalisation, méthodes exactes et métaheuristiques / Proposition and study of an extension of the RCPSP with resource pooling between distant sites

Laurent, Arnaud 10 October 2017 (has links)
Cette thèse a pour objet l’étude d’une extension du RCPSP, un problème d’ordonnancement de tâches et d’affectation de ressources. Cette extension considère un aspect multi-site au problème. Cette extension a pour but de modéliser des problématiques de mutualisation de ressources entre plusieurs sites, comme c’est notamment le cas dans les communautés hospitalières. Pour résoudre ce problème nous avons proposé des méthodes exactes ainsi que des méthodes approchées. Deux modèles mathématiques ont été proposés et comparés sur de petites instances générées. Des méthodes approchées ont également été proposées. Ces méthodes s’articulent sur un couplage méta-heuritique / algorithme d’ordre strict et permettent d’explorer un espace de recherche restreint. Trois différents codages de solution ont été proposés ainsi que trois algorithmes d’ordre strict correspondant à chacun des trois codages. Ces différentes méthodes ont été comparées et analysées selon les instances et le temps de calcul alloué. / Résumé non disponible
16

Characterizing Whole-Brain Age-Associated Trajectories of R1 in Early Adulthood Using Multi-Site MRI

Heo, Stella (In Kyung) January 2023 (has links)
Myelin facilitates efficient neural signal transmission along axons. While predominantly present in white matter, myelin is also found in smaller amounts in the outermost layer of gray matter, known as the cortex, as well as deep subcortical structures. Quantitative magnetic resonance imaging (qMRI) metrics, including longitudinal relaxation rate (R1), can report myelin levels in vivo, although these measures are often estimated and can vary depending on pulse sequences and acquisition parameters used to collect the data. Multi-site approaches can increase the statistical power and ecological validity of studies by recruiting participants from larger and more diverse samples, but considerable variability has previously been reported in qMRI estimates of myelin computed using data from different MRI scanners. Here, we assessed intra- and inter-vendor variability in R1 maps acquired at three sites using scanners from two manufacturers, General Electric (GE) and Siemens. Two ‘traveling heads’ scans, where a participant visits and completes a scan at each site, were acquired to directly assess site effects independent of biological variability. Histogram-based site-specific scaling factors determined from the ‘traveling heads’ scans were then applied to harmonize the main dataset. Before site correction, comparable inter- and intra-vendor differences were observed in both the main dataset and the ‘traveling heads’ scans. Our method of harmonization reduced the inter-site variability considerably, while remaining sensitive to age effects in R1. We then characterized age trajectories of R1 across the whole brain using linear regressions. In the age range of 16-36, age was significantly associated with mean R1s of bilateral putamen, left pallidum, and left amygdala, in line with past research. Cortical analyses also replicated earlier findings, with higher age associations in regions of the motor and lateral frontal cortices. The findings contribute to the growing research in multi-site harmonization, while providing normative estimates and trajectories of whole-brain R1s that can be referred to in future clinical studies. / Thesis / Master of Science (MSc) / Myelin is crucial for efficient signal transmission in nerve cells, and advancements in magnetic resonance imaging (MRI) have allowed us to indirectly estimate myelin levels in the brain. Collaborative multi-site investigations have become increasingly popular due to their ability to recruit larger and more diverse samples, making their findings more generalizable to the public. However, differences in scanner hardware and configurations across sites can introduce site-dependent biases to MRI scans. In this thesis, we found considerable inter-site variability in our whole-brain MRI-based estimate of myelin based on longitudinal relaxation rate (R1). We thus developed a method that can remove unwanted site-dependent differences from images by comparing repeated scans across sites. Using the corrected data, we showed how myelin amounts in different brain structures changes with age during early adulthood. Overall, we highlight the importance of carefully considering site-specific differences in multi-site MRI data and characterized how myelin changes with age in young adults.
17

Coping With the Unplanned: The Dynamics of Improvisation in Information Systems Evolution Within and Across Firm Boundaries

McGann, Sean T. January 2005 (has links)
No description available.
18

Topics in Sparse Inverse Problems and Electron Paramagnetic Resonance Imaging

Som, Subhojit 27 October 2010 (has links)
No description available.
19

Architecture distribuée interopérable pour la gestion des projets multi-sites : application à la planification des activités de production / A distributed and interoperable architecture to manage multi-site projects : application to the planning of production activities

Ishak, Karim 04 November 2010 (has links)
Aujourd’hui, la production est souvent multi-site car les entreprises se recentrent sur leurs cœurs de métiers. Dans ce contexte, la gestion des projets est une tâche difficile car il faut prendre en compte la distribution de la décision et l’hétérogénéité qui peut exister entre les différentes applications de production des partenaires. Les Systèmes Multi-Agents, et notamment le modèle SCEP (Superviseur, Client, Environnement, Producteur), apportent une solution satisfaisante au problème de la distribution de la décision, en instaurant une coopération entre des agents responsables de la gestion des projets client et des agents représentant les sites de production distants. Néanmoins, ce modèle présente des limites à cause de sa faible capacité à communiquer et à coopérer avec des modèles et des systèmes de gestion hétérogènes ainsi qu’à sa difficulté à localiser les nouveaux partenaires. Dans ce mémoire, nous proposons une architecture distribuée et interopérable SCEP-SOA intégrant les concepts du modèle SCEP et ceux du modèle SOA (Service Oriented Architecture) qui offre des mécanismes de mise en relation des partenaires et permet des communications entre des systèmes et des applications hétérogènes. Pour garantir la bonne compréhension des informations échangées entre les partenaires, l’architecture SCEP-SOA met en œuvre une stratégie d’interopérabilité sémantique basée sur l’intégration des ontologies. Cette stratégie s’articule autour d’une ontologie globale et commune utilisée pour l’échange des informations, et des mécanismes de correspondances entre cette ontologie globale et les ontologies locales des partenaires. Cette architecture est illustrée sur un cas d’étude où l’on se focalise sur l’interopérabilité entre des applications dédiées à la planification des projets de fabrication multi-sites. / Today, the production is often multi-site because companies focus on their core competencies. In this context, projects’ management is a difficult task because it must take into account the distribution of the decision and the heterogeneity which can exist between the various production applications of the partners. The Multi-agents systems, in particular the SCEP model (Supervisor, Customer, Environment, Producer), offer a satisfactory solution for the decision distribution problem, by establishing a cooperation between agents responsible of the management of the customer projects and agents representing the remote production sites. Nevertheless, this model presents limits because of its weak ability to communicate and to cooperate with heterogeneous models and management systems, as well as in its difficulty to localize new partners. In this dissertation, we propose a distributed and interoperable architecture, SCEP-SOA, which integrates concepts of the SCEP model and SOA (Service Oriented Architecture) which offers mechanisms for putting in relation various partners and allows communication between heterogeneous systems and applications. To insure the good understanding of the information exchanged between the partners, the SCEP-SOA architecture implements a strategy of semantic interoperability based on the integration of ontologies. This strategy is based on the use of a shared global ontology for information exchange, and on mechanisms of mappings between the global ontology and the partners’ local ontologies. This architecture is illustrated by a study case in which we focus on the interoperability between applications dedicated to the planning of manufacturing multi-sites projects
20

Dynamique de l’interaction entre formes culturelles globales et locale : Étude ethnographique multi-site de la consommation musicale chez les jeunes Vietnamiens / Dynamics of the interaction between global and local cultural forms : study ethnographic multi-site musical consumption among Vietnamese youth

Nguyen, Nhat Nguyen 30 November 2016 (has links)
Les recherches en comportement du consommateur sur la globalisation mettent souvent l’accent sur l’interaction dialectique ou dialogique entre une culture globale et une culture locale. Dans cette thèse ethnographique multi-site, nous nous attachons à comprendre l’interaction entre les formes culturelles globales provenant de différentes origines et la culture locale. Nous étudions celle-ci dans le contexte de la consommation de la musique pop sudcoréenne (K-pop) et de la musique pop anglo-américaine (USUK-pop) chez les jeunes Vietnamiens. Notre recherche révèle que l’interaction entre les formes culturelles globales et la culture locale est dynamique, complexe et transformative. Nous identifions deux formes d’interactions culturelles : une verticale où la culture locale et les formes culturelles globales s’opposent et rentrent directement en dialogue ; l’autre horizontale où la culture locale favorise une relation dialectique et dialogique entre les formes culturelles globales. Ces interactions se manifestent dans trois espaces : imaginaire, discursif et corporel. Elles se transforment et se manifestent constamment selon les expériences vécues des consommateurs locaux. Sur le plan théorique, notre travail contribue à prolonger la conceptualisation de l’interaction culturelle entre global et local. Ce travail offre également des implications méthodologiques dans l’étude de la globalisation ainsi que des apports managériaux pour le marketing international. / Consumer research on cultural globalization has paid attention to either dialectical interaction or dialogical interactions between a local culture and a global cultural forms coming from one origin. In this multi-sited ethnographic study, we focus on the cultural interaction between local culture and global cultures coming from different origins. We focus on the Vietnamese youngconsumers’ consumption of Korean pop music (K-pop) and Anglo-American pop music(USUK-pop) as a context. Our study shows that the cultural interaction between global and local is dynamic, complex and transformative. We identify two manifestations of this interaction: one is vertical, in which local culture simultaneously opposes to and dialogues with global cultural forms; another is horizontal, in which local culture stimulates dialectical and dialogical exchanges between global cultural forms. The interactions between global and localoccur in three spaces: imaginary, discursive and corporeal. They transform and performdifferently in consonance with lived experiences of local consumers. Our study extends theconceptualisation of cultural interaction between global and local. It also offers somemethodological reflections to the literature on globalization, as well as managerial implicationsto international marketing.

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