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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.
291

Aquisição rápida de imagens com técnicas tipo Echo Planar Imaging - Implementação das sequências EPI e SEPI. / Fast acquisition of images with techniques of type Echo Planar Imaging - Implementation of sequences EPI and SEPI

Bueno, Lucian Soares 18 June 2004 (has links)
O objetivo deste trabalho é o desenvolvimento e implementação de metodologias de imagens por Ressonância Magnética Nuclear, para diminuição do tempo de aquisição, já que nos exames clínicos convencionais esse tempo é muito superior ao utilizado nessas seqüências, que é da ordem de T_ 2 , essas seqüências são baseadas na varredura única do espaço-k, convencionalmente denominada Echo Planar Imaging. Os propósitos de utilização dessa metodologia compreendem desde exames clínicos convencionais, em que se pretende analisar, em projetos futuros, eventos não periódicos de curta duração e a dinâmica dos sistemas biológicos estudados, até imagens de cavidades utilizando gases hiperpolarizados. As técnicas implementadas em comparação com as inicialmente propostas por Masfield apresentam uma diferença que é a inexistência do pulso de RF de inversão e, com isso, o tempo de duração das seqüências implementadas é ainda menor. Apenas não se deve esperar muito da qualidade das imagens sem o pós-processamento, uma vez que esse trabalho já está em andamento. / The objective of this work is the development and implementation of methodologies of images for Nuclear Magnetic Resonance, for reduction of the time of acquisition, since in the conventional clinical examinations this time is very superior to the used one in these sequences, that are of the order of T_ 2 , these sequences is based on the only sweepings of the space-k, conventionally called Echo Planar Imaging. The intentions of use of this methodology understand since conventional clinical examinations, where if it intends to analyze, in future projects, not periodic events of short duration and the dynamics of the biological systems studied, until socket images using hiperpolarizados gases. The techniques implemented in comparison with initially the proposals for Masfield present a difference that is the inexistence of the pulse of RF of inversion and, with this, the time of duration of the implemented sequences are still lesser. But if it does not have to wait very of the quality of the images without the after-processing, a time that this work already is in progress.
292

Optimisation de la source synchrotron cohérente dans le domaine des Térahertz pour la spectroscopie à haute résolution de molécules d'intérêt astrophysique / Optimization of a coherent synchrotron radiation source in the Terahertz range for high-resolution spectroscopy of molecules of astrophysical interest

Barros, Joanna 18 December 2012 (has links)
La spectroscopie par transformée de Fourier est l’outil multiplexe de mesure de spectres à haute résolution le plus utilisé dans l’infrarouge. Son extension au domaine Térahertz se révèle de grand intérêt pour la spectroscopie de molécules présentes dans le milieu interstellaire, mais se heurte à différents obstacles : en particulier, aucune source large bande n'est suffisamment intense et stable pour ces applications. Cette thèse présente des développements instrumentaux basés sur l’exploitation du rayonnement synchrotron cohérent (CSR) sur la ligne AILES du synchrotron SOLEIL, optimisée pour l'infrarouge lointain. Les conditions de production du CSR sont étudiées pour les besoins des analyses spectroscopiques à haute résolution ; les performances de cette source sont caractérisées et comparées à celles du rayonnement incohérent. La mise en place d'un système de double détection permet une correction de l'effet des instabilités de la source et une augmentation conséquente du rapport signal-sur-bruit. Ces développements sont appliqués à la mesure de spectres de rotation pure ; une modélisation améliorée du spectre dans l'état fondamental de la molécule de propynal a ainsi pu être faite, prouvant la complémentarité de la source étudiée vis-à-vis des sources micro-onde ou infrarouge classiques. / Fourier Transform spectroscopy is the most used multiplex tool for high-resolution measurements in the infrared range. Its extension to the Terahertz domain is of great interest for spectroscopic studies of interstellar molecules. This application is however hampered by the lack of dedicated, broadband sources with a sufficient intensity and stability. In this work, Coherent Synchrotron Radiation (CSR) was used as a source for molecular spectroscopy at high resolution on the AILES infrared and Terahertz beamline of SOLEIL synchrotron. The beamline being optimized for far-infrared, we could characterize the properties of CSR and compare them to the incoherent synchrotron radiation. A double detection system allowed to correct the effect of the source-related instabilities, hence to significantly increase the signal-to-noise ratio. Pure rotational spectra were measured using these developments. The case of the propynal molecule, for which a refined set of rotational and centrifugal distortion constants was calculated, proves the complementarity between CSR and the classical microwave or infrared sources.
293

Cultura organizacional, corpo artefato e embodiment : etnografia em uma livraria de shopping center

Flores-Pereira, Maria Tereza January 2007 (has links)
O tema da cultura organizacional tem sido visivelmente aprofundado a partir de mudanças na sua base epistemológica (de um paradigma funcionalista para um interpretativista) e na utilização de diferentes perspectivas conceituais (de uma abordagem gerencial para uma simbólica) e metodológicas (de pesquisas quantitativas para qualitativas). Todavia, a despeito de todos esses avanços, o tema não tem acompanhado o desenvolvimento alcançado pelos estudos antropológicos que enfocam o corpo como modo de repensar a problemática cultural. É meu objetivo nesta tese, portanto, desvelar de que modo um enfoque no corpo humano propicia um melhor entendimento da noção de cultura organizacional, a partir de dois eixos teóricos que trabalham com a relação corpo-cultura: o ‘corpo artefato’ (corpo sócio-histórico-cultural) e o ‘embodiment’ (experiência cultural incorporada). Para realizar ambas as análises, parto de observações oriundas de uma etnografia organizacional junto a uma grande livraria de shopping center, a Livraria Cultura de Porto Alegre. O grupo de informantes privilegiado nessas análises foi a equipe de vendedores. Com base nesse material empírico e, primeiramente, com base em estudos da Antropologia do Corpo (capítulo 2), na primeira parte deste trabalho, analisei o corpo do trabalhador como um artefato organizacional que se singulariza por seu caráter dinâmico, sua hierarquização e sua dimensão política. A partir dessas análises, foi possível repensar o caráter de objeto inanimado e a pouca atenção que é oferecida para questões como classificação, hierarquização e dimensão política dos artefatos organizacionais. Na segunda parte (capítulo 3), aponto para a relação cultural pré-objetiva (pré-reflexiva) que trabalhadores estabelecem com as organizações e com os produtos que comercializam, ou seja, como a cultura organizacional é experienciada e incorporada. Para isso, parto de estudos da Filosofia e de Ciências Sociais e Humanas para buscar compreender como os estudos de embodiment possibilitam um novo modo de se conduzir metodologicamente as pesquisas de cultura organizacional e como incrementam sua conceituação. Levantei que o foco no embodiment desvela o papel ativo que o corpo tem na vida organizacional e permite uma melhor compreensão da dinâmica do conceito de cultura. / The theme of organizational culture has been visibly deepened – changing its epistemological base (from a Functionalist paradigm to an interpretative one) generating different conceptual (from a managerial to a symbolic approach) and methodological perspectives (from quantitative to qualitative researches). However, in spite of all these advances, the theme has not been following the development reached by anthropological studies, which focus the body as a form of representing the culture. Therefore, it is my aim in this thesis to unveil in what way the focus on the human body propitiates a better understanding of the notion of organizational culture, starting from two theoretical orientations which work with the relation body-culture: the ‘body artifact’ (socio-historiccultural body) and the ‘embodiment’. In order to perform both analyses, I begin with observations resulting from an organizational ethnography in a great bookstore of shopping center, Livraria Cultura de Porto Alegre. The group of informers who have been privileged to participate in these analyses was the team of shop assistants. Based on this empirical material and, firstly, on studies of The Anthropology of Body (chapter two), I analyzed the body of the worker as an organizational artifact which is singularized by their dynamic feature, hierarchization, and political dimension. Based on these analyses, it was possible to reconsider the feature of inanimate object and the little attention that is offered to questions like classification, hierarchization, and political dimension of organizational artifacts. In the second part (chapter three), I indicate the pre-objective cultural relation (pre-reflexive) that the workers establish with the organizations and the products they commercialize, that is, the embodiment of organizational culture. Hence, I start from studies of Philosophy, Social, and Human Sciences to understand how studies of embodiment enable a new form of conducting methodologically researches about organizational culture and how they develop their conceptualization. I indicate that the focus on embodiment unveil the active role the body has in the organizational life and allows a better understanding of the dynamics of cultural concept.
294

Estimativa robusta da frequ?ncia card?aca a partir de sinais de fotopletismografia de pulso

Benetti, Tiago 31 August 2018 (has links)
Submitted by PPG Engenharia El?trica (engenharia.pg.eletrica@pucrs.br) on 2018-10-29T13:30:23Z No. of bitstreams: 1 TIAGO BENETTI_DIS.pdf: 5038519 bytes, checksum: 95fa8d1b367b574eee27e772a55a9a49 (MD5) / Approved for entry into archive by Caroline Xavier (caroline.xavier@pucrs.br) on 2018-10-30T17:21:55Z (GMT) No. of bitstreams: 1 TIAGO BENETTI_DIS.pdf: 5038519 bytes, checksum: 95fa8d1b367b574eee27e772a55a9a49 (MD5) / Made available in DSpace on 2018-10-30T17:27:25Z (GMT). No. of bitstreams: 1 TIAGO BENETTI_DIS.pdf: 5038519 bytes, checksum: 95fa8d1b367b574eee27e772a55a9a49 (MD5) Previous issue date: 2018-08-31 / Heart rate monitoring using Photoplethysmography (PPG) signals acquired from the individuals pulse has become popular due to emergence of numerous low cost wearable devices. However, monitoring during physical activities has obstacles because of the influence of motion artifacts in PPG signals. The objective of this work is to introduce a new algorithm capable of removing motion artifacts and estimating heart rate from pulse PPG signals. Normalized Least Mean Square (NLMS) and Recursive Least Squares (RLS) algorithms are proposed for an adaptive filtering structure that uses acceleration signals as reference to remove motion artifacts. The algorithm uses the Periodogram of the filtered signals to extract their heart rates, which will be used together with a PPG Signal Quality Index to feed the input of a Kalman Filter. Specific heuristics and the Quality Index collaborate so that the Kalman filter provides a heart rate estimate with high accuracy and robustness to measurement uncertainties. The algorithm was validated from the heart rate obtained from Electrocardiography signals and the proposed method with the RLS algorithm presented the best results with an absolute mean error of 1.54 beats per minute (bpm) and standard deviation of 0.62 bpm, recorded for 12 individuals performing a running activity on a treadmill with varying speeds. The results make the performance of the algorithm comparable and even better than several recently developed methods in this field. In addition, the algorithm presented a low computational cost and suitable to the time interval in which the heart rate estimate is performed. Thus, it is expected that this algorithm will improve the obtaining of heart rate in currently available wearable devices. / O monitoramento da frequ?ncia card?aca utilizando sinais de Fotopletismografia ou PPG (do ingl?s, Photopletismography) adquiridos do pulso de indiv?duos tem se popularizado devido ao surgimento de in?meros dispositivos wearable de baixo custo. No entanto, o monitoramento durante atividades f?sicas tem dificuldades em raz?o da influ?ncia de artefatos de movimento nos sinais de PPG. O objetivo deste trabalho ? introduzir um novo algoritmo capaz de remover artefatos de movimento e estimar a frequ?ncia card?aca de sinais de PPG de pulso. Os algoritmos do M?nimo Quadrado M?dio Normalizado ou NLMS (do ingl?s, Normalized Least Mean Square) e de M?nimos Quadrados Recursivos ou RLS (do ingl?s, Recursive Least Squares) s?o propostos para uma estrutura de filtragem adaptativa que utiliza sinais de acelera??o como refer?ncia para remover os artefatos de movimento. O algoritmo utiliza o Periodograma dos sinais filtrados para extrair suas frequ?ncias card?acas, que ser?o utilizadas juntamente com um ?ndice de Qualidade do Sinal de PPG para alimentar a entrada de um Filtro de Kalman. Heur?sticas espec?ficas e o ?ndice de Qualidade colaboram para que filtro de Kalman forne?a uma estimativa da frequ?ncia card?aca com alta acur?cia e robustez a incertezas de medi??o. O algoritmo foi validado a partir da frequ?ncia card?aca obtida de sinais de Eletrocardiografia e o m?todo proposto com o algoritmo RLS apresentou os melhores resultados com um erro m?dio absoluto de 1,54 batimentos por minuto (bpm) e desvio padr?o de 0,62 bpm, registrados para 12 indiv?duos realizando uma atividade de corrida em uma esteira com velocidades variadas. Os resultados tornam o desempenho do algoritmo compar?vel e at? mesmo melhor que v?rios m?todos desenvolvidos recentemente neste campo. Al?m disso, o algoritmo apresentou um custo computacional baixo e adequado ao intervalo de tempo em que a estimativa da frequ?ncia card?aca ? realizada. Dessa forma, espera-se que este algoritmo melhore a obten??o da frequ?ncia card?aca em dispositivos wearable atualmente dispon?veis.
295

Exploring complexity metrics for artifact- centric business process Models

Marin, Mike Andy 02 1900 (has links)
This study explores complexity metrics for business artifact process models described by Case Management Model and Notation (CMMN). Process models are usually described using Business Process Management (BPM), which is a relatively mature discipline with a large number of practitioners. Over the last few decades a new way of describing data intensive business processes has emerged in BPM literature, for which traditional BPM is no longer adequate. This emerging method, used to describe more flexible processes, is called business artifacts with Guard-Stage-Milestone (GSM). The work on GSM influenced CMMN, which was created to fill a market need for more flexible case management processes for knowledge workers. Complexity metrics have been developed for traditional BPM models, such as the Business Process Model and Notation (BPMN). However, traditional BPM is not suitable for describing GSM or CMMN process models. Therefore, complexity metrics developed for traditional process models may not be applicable to business artifact process models such as CMMN. This study addresses this gap by exploring complexity metrics for business artifact process models using CMMN. The findings of this study have practical implications for the CMMN standard and for the commercial products implementing CMMN. This research makes the following contributions: • The development of a formal description of CMMN using first-order logic. • An exploration of the relationship between CMMN and GSM and the development of transformation procedures between them. • A comparison between the method complexity of CMMN and other popular process methods, including BPMN, Unified Modeling Language (UML) Activity diagrams, and Event-driven Process Charts (EPC). • The creation of a systematic literature review of complexity metrics for process models, which was conducted in order to inform the creation of CMMN metrics. • The identification of a set of complexity metrics for the CMMN standard, which underwent theoretical and empirical validation. This research advances literature in the areas of method complexity, complexity metrics for process models, declarative processes, and research on CMMN by characterizing CMMN method complexity, identifying complexity metrics for CMMN, and exploring the relationship between CMMN and GSM. / School of Computing / Ph. D. (Computer Science)
296

The individual development plan as tool and practice in Swedish compulsory school

Hirsh, Åsa January 2013 (has links)
Since 2006 Swedish compulsory school teachers are required to use individual developmentplans (IDPs) as part of their assessment practices. The IDP has developed through two major reforms and is currently about to undergo a third in which requirements for documentation are to be reduced. The original purpose of IDP was formative: a document containing targets and strategies for the student's future learning was to be drawn up at the parent-pupil-teacher meetingeach semester. The 2008 reform added requirements for written summative assessments/grade-like symbols to be used in the plan. This thesis aims to generate knowledge of the IDP as a tool in terms of what characterizes IDP documents as well as teachers' descriptions of continuous IDP work. It contains four articles. The first two are based on 379 collected IDP documents from all stages of compulsoryschool, and the last two build on interviews with 15 teachers. Throughout, qualitative content analysis has been used for processing data. The analytical framework comprises Latour's conceptual pair inscription – translation, Wartofsky's notions of primary/secondary/tertiary artifacts, and Wertsch's distinction between mastery and appropriation, which together provide an overall framework for understanding how the IDP becomes a contextually shaped tool that mediates teachers' actions in practice. Moreover, the activity theoretical concept of contradictionis used to understand and discuss dilemmas teachers experience in relation to IDP. In article 1, targets and strategies for future learning given to students are investigated and discussed in relation to definitions of formative assessment. Concepts were derived from the data and used for creating a typology of target and strategy types related either to being aspects (students' behavior/attitudes/personalities) or to subject matter learning. In article 2, the distribution of being and learning targets to boys and girls, respectively, is investigated. The results point to a significant gendered difference in the distribution of being targets. Possible reasons for the gendered distribution are discussed from a doing-gender perspective, and the proportion of being targets in IDPs is discussed from an assessment validity point of view. In article 3, teachers' continuous work with IDPs is explored, and it is suggested that IDP work develops in relation to perceived purposes and the contextual conditions framing teachers' work. Three qualitatively different ways of perceiving and working with IDP are described in a typology. Article 4 elaborates on dilemmas that teachers experience in relation to IDP, concerning time, communication, and assessment. A tentative categorization of dilemma management strategies is also presented. Results are synthesized in the final part of the thesis, where the ways in which documents are written and IDP work is carried out are discussed as being shaped in the intersection between rules and guidelines at national, municipal and local school level, and companies creating solutions for IDP documentation. Various purposes are to be achieved with the help of the IDP, which makes it a potential field of tension that is not always easy for teachers to navigate. Several IDP-related difficulties, but also opportunities and affordances, are visualized in the studies of this thesis. / <p>Svensk sammanfattning: s. 111-126.</p>
297

The impact of metallic cranial implants on proton-beam radiotherapy treatment plans for near implant located tumours : A phantom study on the physical effects and agreement between simulated treatment plans and the resulting treatment for near implant located cranial tumours

Sjögren, Adam January 2018 (has links)
Within the field of radiotherapy treatments of tumour diseases, the hunt for more accurate and effective treatment methods is a continuous process. For some years ion-beam based radiotherapy, especially the proton-beam based applications, has increased in popularity and availability. The main reason behind this is the fact that ion-beam based applications make it possible to modulate the dose after the planning target volume (PTV) defined by the radiation oncologist. This means that it becomes possible to spare tissue in another way, which might result in more effective treatments, especially in the vicinity of radio sensitive organs. Ion-beam based treatments are however more sensitive to uncertainties in PTV position and beam range as ion-beams have a fixed range depending on target media and initial energy, as opposed to the conventional x-ray beams that do not really have a defined range. Instead their intensity decreases exponentially at a rate dependent of the initial energy and target media. Therefore density heterogeneities result in uncertainties in the planned treatments. As the plans normally are created using a CT-images, for which metallic implants can yield increased heterogeneities both from the implants themselves and so called metal artifacts (distortions in the images caused by different processes as the X-rays used in image acquisition goes through metals). Metallic implants affects the accuracy of a treatment, and therefore also the related risks, so it is important to have an idea of the magnitude of the impact. Therefore the aim of this study is to estimate the impact on a proton-beam based treatment plan for six cranial implants. These were one Ti-mesh implant, one temporal plate implant, one burr-hole cover implant and three craniofix implants of different sizes, which all are commonly seen at the Skandion clinic. Also the ability of the treatment planning system (TPS), used at the clinic, to simulate the effects on the plans caused by the implants is to be studied. From this result it should be estimated if the margins and practices in place at the clinic, for when it is required to aim the beam through the implant, are sufficient or if they should be changed. This study consisted of one test on the range shift effects and one test on the lateral dose distribution changes, with one preparational test in the form of a calibration of Gafchromic EBT3 films. The range shift test was performed on three of the implants, excluding the three craniofix implants using a water phantom and a treatment plan created to represent a standard treatment in the cranial area. The lateral dose distribution change test was performed as a solid phantom study using radiochromic film, for two treatment plans (one where the PTV was located \SI{2}{\centi\metre} below surface, for all implants, and one where it was located at the surface, only for the Ti-mesh and the temporal plate). The results of both tests were compared to simulations performed in the Eclipse treatment planing system (TPS) available at Skandion. The result of the range shift test showed a maximum range shift of \SI{-1.03 +- 0.01}{\milli\metre}, for the burr-hole cover implant, and as the related Eclipse simulations showed a maximal shift of \SI{-0.17 +- 0.01}{\milli\metre} there was a clear problem with the simulation. However, this might not be because of the TPS but due to errors in the CT-image reconstruction, such as, for example, geometrical errors in the representation of the implants. As the margin applied for a similar situation at the Skandion clinic (in order to correct for several uncertainty factors) is \SI{4.2}{\milli\metre} there might be a need to increase this margin depending on the situation. For the lateral distribution effects no definite results were found as the change varied in magnitude, even if it tended to manifest as a decreasing dose for the first plan and a increasing dose for the second. It was therefore concluded that further studies are needed before anything clear can be said.
298

Cultura organizacional, corpo artefato e embodiment : etnografia em uma livraria de shopping center

Flores-Pereira, Maria Tereza January 2007 (has links)
O tema da cultura organizacional tem sido visivelmente aprofundado a partir de mudanças na sua base epistemológica (de um paradigma funcionalista para um interpretativista) e na utilização de diferentes perspectivas conceituais (de uma abordagem gerencial para uma simbólica) e metodológicas (de pesquisas quantitativas para qualitativas). Todavia, a despeito de todos esses avanços, o tema não tem acompanhado o desenvolvimento alcançado pelos estudos antropológicos que enfocam o corpo como modo de repensar a problemática cultural. É meu objetivo nesta tese, portanto, desvelar de que modo um enfoque no corpo humano propicia um melhor entendimento da noção de cultura organizacional, a partir de dois eixos teóricos que trabalham com a relação corpo-cultura: o ‘corpo artefato’ (corpo sócio-histórico-cultural) e o ‘embodiment’ (experiência cultural incorporada). Para realizar ambas as análises, parto de observações oriundas de uma etnografia organizacional junto a uma grande livraria de shopping center, a Livraria Cultura de Porto Alegre. O grupo de informantes privilegiado nessas análises foi a equipe de vendedores. Com base nesse material empírico e, primeiramente, com base em estudos da Antropologia do Corpo (capítulo 2), na primeira parte deste trabalho, analisei o corpo do trabalhador como um artefato organizacional que se singulariza por seu caráter dinâmico, sua hierarquização e sua dimensão política. A partir dessas análises, foi possível repensar o caráter de objeto inanimado e a pouca atenção que é oferecida para questões como classificação, hierarquização e dimensão política dos artefatos organizacionais. Na segunda parte (capítulo 3), aponto para a relação cultural pré-objetiva (pré-reflexiva) que trabalhadores estabelecem com as organizações e com os produtos que comercializam, ou seja, como a cultura organizacional é experienciada e incorporada. Para isso, parto de estudos da Filosofia e de Ciências Sociais e Humanas para buscar compreender como os estudos de embodiment possibilitam um novo modo de se conduzir metodologicamente as pesquisas de cultura organizacional e como incrementam sua conceituação. Levantei que o foco no embodiment desvela o papel ativo que o corpo tem na vida organizacional e permite uma melhor compreensão da dinâmica do conceito de cultura. / The theme of organizational culture has been visibly deepened – changing its epistemological base (from a Functionalist paradigm to an interpretative one) generating different conceptual (from a managerial to a symbolic approach) and methodological perspectives (from quantitative to qualitative researches). However, in spite of all these advances, the theme has not been following the development reached by anthropological studies, which focus the body as a form of representing the culture. Therefore, it is my aim in this thesis to unveil in what way the focus on the human body propitiates a better understanding of the notion of organizational culture, starting from two theoretical orientations which work with the relation body-culture: the ‘body artifact’ (socio-historiccultural body) and the ‘embodiment’. In order to perform both analyses, I begin with observations resulting from an organizational ethnography in a great bookstore of shopping center, Livraria Cultura de Porto Alegre. The group of informers who have been privileged to participate in these analyses was the team of shop assistants. Based on this empirical material and, firstly, on studies of The Anthropology of Body (chapter two), I analyzed the body of the worker as an organizational artifact which is singularized by their dynamic feature, hierarchization, and political dimension. Based on these analyses, it was possible to reconsider the feature of inanimate object and the little attention that is offered to questions like classification, hierarchization, and political dimension of organizational artifacts. In the second part (chapter three), I indicate the pre-objective cultural relation (pre-reflexive) that the workers establish with the organizations and the products they commercialize, that is, the embodiment of organizational culture. Hence, I start from studies of Philosophy, Social, and Human Sciences to understand how studies of embodiment enable a new form of conducting methodologically researches about organizational culture and how they develop their conceptualization. I indicate that the focus on embodiment unveil the active role the body has in the organizational life and allows a better understanding of the dynamics of cultural concept.
299

Exploring complexity metrics for artifact-centric business process models

Marin, Mike A. 02 1900 (has links)
This study explores complexity metrics for business artifact process models described by Case Management Model and Notation (CMMN). Process models are usually described using Business Process Management (BPM), which is a relatively mature discipline with a large number of practitioners. Over the last few decades a new way of describing data intensive business processes has emerged in BPM literature, for which traditional BPM is no longer adequate. This emerging method, used to describe more flexible processes, is called business artifacts with Guard-Stage-Milestone (GSM). The work on GSM influenced CMMN, which was created to fill a market need for more flexible case management processes for knowledge workers. Complexity metrics have been developed for traditional BPM models, such as the Business Process Model and Notation (BPMN). However, traditional BPM is not suitable for describing GSM or CMMN process models. Therefore, complexity metrics developed for traditional process models may not be applicable to business artifact process models such as CMMN. This study addresses this gap by exploring complexity metrics for business artifact process models using CMMN. The findings of this study have practical implications for the CMMN standard and for the commercial products implementing CMMN. This research makes the following contributions: • The development of a formal description of CMMN using first-order logic. • An exploration of the relationship between CMMN and GSM and the development of transformation procedures between them. • A comparison between the method complexity of CMMN and other popular process methods, including BPMN, Unified Modeling Language (UML) Activity diagrams, and Event-driven Process Charts (EPC). • The creation of a systematic literature review of complexity metrics for process models, which was conducted in order to inform the creation of CMMN metrics. • The identification of a set of complexity metrics for the CMMN standard, which underwent theoretical and empirical validation. This research advances literature in the areas of method complexity, complexity metrics for process models, declarative processes, and research on CMMN by characterizing CMMN method complexity, identifying complexity metrics for CMMN, and exploring the relationship between CMMN and GSM. / Ph.D. (Computer Science)
300

Cultura organizacional, corpo artefato e embodiment : etnografia em uma livraria de shopping center

Flores-Pereira, Maria Tereza January 2007 (has links)
O tema da cultura organizacional tem sido visivelmente aprofundado a partir de mudanças na sua base epistemológica (de um paradigma funcionalista para um interpretativista) e na utilização de diferentes perspectivas conceituais (de uma abordagem gerencial para uma simbólica) e metodológicas (de pesquisas quantitativas para qualitativas). Todavia, a despeito de todos esses avanços, o tema não tem acompanhado o desenvolvimento alcançado pelos estudos antropológicos que enfocam o corpo como modo de repensar a problemática cultural. É meu objetivo nesta tese, portanto, desvelar de que modo um enfoque no corpo humano propicia um melhor entendimento da noção de cultura organizacional, a partir de dois eixos teóricos que trabalham com a relação corpo-cultura: o ‘corpo artefato’ (corpo sócio-histórico-cultural) e o ‘embodiment’ (experiência cultural incorporada). Para realizar ambas as análises, parto de observações oriundas de uma etnografia organizacional junto a uma grande livraria de shopping center, a Livraria Cultura de Porto Alegre. O grupo de informantes privilegiado nessas análises foi a equipe de vendedores. Com base nesse material empírico e, primeiramente, com base em estudos da Antropologia do Corpo (capítulo 2), na primeira parte deste trabalho, analisei o corpo do trabalhador como um artefato organizacional que se singulariza por seu caráter dinâmico, sua hierarquização e sua dimensão política. A partir dessas análises, foi possível repensar o caráter de objeto inanimado e a pouca atenção que é oferecida para questões como classificação, hierarquização e dimensão política dos artefatos organizacionais. Na segunda parte (capítulo 3), aponto para a relação cultural pré-objetiva (pré-reflexiva) que trabalhadores estabelecem com as organizações e com os produtos que comercializam, ou seja, como a cultura organizacional é experienciada e incorporada. Para isso, parto de estudos da Filosofia e de Ciências Sociais e Humanas para buscar compreender como os estudos de embodiment possibilitam um novo modo de se conduzir metodologicamente as pesquisas de cultura organizacional e como incrementam sua conceituação. Levantei que o foco no embodiment desvela o papel ativo que o corpo tem na vida organizacional e permite uma melhor compreensão da dinâmica do conceito de cultura. / The theme of organizational culture has been visibly deepened – changing its epistemological base (from a Functionalist paradigm to an interpretative one) generating different conceptual (from a managerial to a symbolic approach) and methodological perspectives (from quantitative to qualitative researches). However, in spite of all these advances, the theme has not been following the development reached by anthropological studies, which focus the body as a form of representing the culture. Therefore, it is my aim in this thesis to unveil in what way the focus on the human body propitiates a better understanding of the notion of organizational culture, starting from two theoretical orientations which work with the relation body-culture: the ‘body artifact’ (socio-historiccultural body) and the ‘embodiment’. In order to perform both analyses, I begin with observations resulting from an organizational ethnography in a great bookstore of shopping center, Livraria Cultura de Porto Alegre. The group of informers who have been privileged to participate in these analyses was the team of shop assistants. Based on this empirical material and, firstly, on studies of The Anthropology of Body (chapter two), I analyzed the body of the worker as an organizational artifact which is singularized by their dynamic feature, hierarchization, and political dimension. Based on these analyses, it was possible to reconsider the feature of inanimate object and the little attention that is offered to questions like classification, hierarchization, and political dimension of organizational artifacts. In the second part (chapter three), I indicate the pre-objective cultural relation (pre-reflexive) that the workers establish with the organizations and the products they commercialize, that is, the embodiment of organizational culture. Hence, I start from studies of Philosophy, Social, and Human Sciences to understand how studies of embodiment enable a new form of conducting methodologically researches about organizational culture and how they develop their conceptualization. I indicate that the focus on embodiment unveil the active role the body has in the organizational life and allows a better understanding of the dynamics of cultural concept.

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