836 resultados para case-based reasoning
Resumo:
The UK’s Digital Economy Act 2010 contains measures to enforce copyright on the Internet, specifically a two-tiered form of a graduated response.The Act was challenged in the High Court by two of the UK’s biggest Internet Service Providers (ISP), who obtained a Judicial Review of the copyright enforce- ment provisions. This paper is an overview of the case, based on the hearing of March 2011 and the ensuing judgement. It focuses on the two most hotly contested grounds for the challenge, namely an al- leged failure to notify the European Commission under the Technical Standards Directive, and the pro- portionality or otherwise of the contested provisions. It observes how the judgement accepted the defence argumentation of the government and the copyright owners as interested parties, and how the ISPs appeared to be put on the back foot.
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Due to the increasing amount of data, knowledge aggregation, representation and reasoning are highly important for companies. In this paper, knowledge aggregation is presented as the first step. In the sequel, successful knowledge representation, for instance through graphs, enables knowledge-based reasoning. There exist various forms of knowledge representation through graphs; some of which allow to handle uncertainty and imprecision by invoking the technology of fuzzy sets. The paper provides an overview of different types of graphs stressing their relationships and their essential features.
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While a remarkable continuity in smallholder agricultural production has been identified, the shift from subsistence orientation towards more wage dependence appears in a different light when analysed under a gender perspective. "Feminisation" has been a catchphrase to characterise some of these processes; however, the debate has been subject to overgeneralisation, and can only inadequately grasp the gender dynamics in what has been referred to as "new ruralities". Illustrated for high-value crop production as an expression of agricultural transition in the Global South, this contribution offers a critical account of the feminisation thesis. Instead of discarding the notion of feminisation, it advocates a reassessment of its potential as a comprehensive framework against which empirical findings can be reflected. While conventional uses of the feminisation thesis have, in their great majority, come up with the conclusion that for women it can always only get worse, I propose a perspective which reveals gains and risks and how they are shared between men and women as they engage in new agricultural labour markets. This perspective rests on a methodology for case-based, comparative studies developed in this paper as a contribution for assessing the nature of agricultural transition and to investigate the qualitative change associated with new ruralities. A distinctive appreciation of the substance of agricultural change for different members of the rural society – namely men and women, but also different men, and different women – is the premise for overcoming barriers to shared development, and for framing effective governance in the context of global development.
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We integrated research on the dimensionality of career success into social-cognitive career theory and explored the positive feedback loop between occupational self-efficacy and objective and subjective career success over time (self-efficacy → objective success → subjective success → self-efficacy). Furthermore, we theoretically accounted for synchronous and time-lagged effects, as well as indirect reciprocity between the variables. We tested the proposed model by means of longitudinal structural equation modeling in a 9-year four-wave panel design, by applying a model comparison approach and indirect effect analyses (N = 608 professionals). The findings supported the proposed positive feedback loop between occupational self-efficacy and career success. Supporting our time-based reasoning, the findings showed that unfolding effects between occupational self-efficacy and objective career success take more time (i.e., time-lagged or over time) than unfolding effects between objective and subjective career success, as well as between subjective career success and occupational self-efficacy (i.e., synchronous or concurrently). Indirect effects of past on future occupational self-efficacy via objective and subjective career success were significant, providing support for an indirect reciprocity model. Results are discussed with respect to extensions of social-cognitive career theory and occupational self-efficacy development over time.
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Radiologists have been confronted with multiple new challenges in recent years. While there has been a steady increase in the number of radiological examinations and imaging material per examination, examination protocols have become more complex and highly time-consuming whereas case-based remuneration is on the decline. The identification of inefficient components in examination processes and reporting is therefore essential. Where and why do time delays occur? How can they be avoided? The following article provides a brief overview and is designed to stimulate discussion.
Resumo:
QUESTIONS UNDER STUDY As the best management of subclinical hypothyroidism is controversial, we aimed to assess variations in treatment strategies depending on different Swiss regions, physician and patient characteristics. METHODS We performed a case-based survey among general practitioners (GPs) in different Swiss regions, which consisted of eight hypothetical cases presenting a female patient with subclinical hypothyroidism and nonspecific complaints differing by age, vitality status and thyroid-stimulating hormone (TSH) concentration. RESULTS A total of 262 GPs participated in the survey. There was considerable variation in the levothyroxine starting dose chosen by GPs, ranging from 25 µg to 100 µg. Across the Swiss regions, GPs in the Bern region were significantly more inclined to treat, with a higher probability of initiating treatment (60%, p = 0.01) and higher mean starting doses (45 µg, p <0.01) compared with the French-speaking region (44%, 36 µg); the Zurich region had intermediate values (52%, 39 µg). We found no association between treatment rate and other physician characteristics. GPs were more reluctant to initiate treatment in 85-year-old than in 70-year-old women (odds ratio [OR] 0.77, 95% confidence interval [CI] 0.63-0.94), and more likely to treat women with a TSH of 15 mU/l than those with a TSH of 6mU/l (OR 8.71, 95% CI 6.21-12.20). CONCLUSIONS There are strong variations in treatment strategies for elderly patients with subclinical hypothyroidism across different Swiss regions, including use of higher starting doses than the recommended 25 µg in the Swiss guidelines, which recommend a starting dose of 25 µg. These variations likely reflect the current uncertainty about the benefits of treatment, which arise from the current lack of evidence from adequately powered clinical trials.
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Little is known about epidemiological markers that are associated with survival of patients with myelodysplastic syndromes (MDS). We conducted a secondary case-based analysis of 465 de novo MDS patients from the University of Texas MD Anderson Cancer Center (UTMDACC). We investigated the association between demographic as well as occupational exposure markers and survival while incorporating known clinical markers of prognosis. In our patient population, 60.6% were men and the majority were white (93.1%). The distribution of MDS subtypes by the French–American–British (FAB) classification was 81 (19%) refractory anemia (RA), 46 (9.9%) refractory anemia with ringed sideroblasts (RARS), 57 (12.3%) chronic myelomonocytic leukemia (CMML), 173 (37.2%) RA with excess blasts (RAEB), and 86 (18.5%) RAEB in transformation (RAEBT). We found that those older at diagnosis (> 60 years of age) (HR = 1.68, CI = 1.26-2.25) were at a higher risk of dying compared to younger patients. Similarly, high pack years of smoking (>= 30 pack years of smoking) (HR = 1.34, CI = 1.02-1.74), and agricultural chemical exposure (HR = 1.61, CI = 1.05-2.46) were significantly associated with overall lower survival when compared to patients with none or medium exposures. Among clinical markers, greater than 5% bone marrow blasts (HR = 1.81 CI = 1.27-2.56), poor cytogenetics (HR = 3.20, CI = 2.37-4.33)), and platelet cytopenias (<100000/ul) (HR = 1.46, CI = 1.11-1.92) were also significantly associated with overall MDS survival.^ The identification of epidemiological markers could help physicians stratify patients and customize treatment strategies to improve the outcome of MDS based on patient lifestyle information such as smoking exposure and agrochemical exposure. We hope that this study highlights the impact of these exposures in MDS prognosis.^
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Ciao is a logic-based, multi-paradigm programming system. One of its most distinguishing features is that it supports a large number of semantic and syntactic language features which can be selectively activated or deactivated for each program module. As a result, a module can be written in, for example, ISO-Prolog plus constraints and higher order, while another can be a puré logic module with a different control rule such as iterative deepening and/or tabling, and perhaps using constructive negation. A powerful and modular extensión mechanism allows user-level design and implementation of such features and sub-languages. Another distinguishing feature of Ciao is its powerful assertion language, which allows expressing many kinds of program properties (ranging from, e.g., moded types to resource consumption), as well as tests and documentation. The compiler is capable of statically ñnding violations of these properties or verifying that programs comply with them, and issuing certiñcates of this compliance. The compiler also performs many types of optimizations, including automatic parallelization. It offers very competitive performance, while retaining the flexibility and interactive development of a dynamic language. We will present a hands-on overview of the system, through small examples which emphasize the novel aspects and the motivations which lie behind Ciao's design and implementation.
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The paper presents the possibility of implementing a p-adaptive process with the B.E.M. Although the exemples show that good results can be obtained with a limited amount of storage and with the simple ideas explained above, more research is needed in order to improve the two main problems of the method, i.e.: the criteria of where to refine and until what degree. Mathematically based reasoning is still lacking and will be useful to simplify the decission making. Nevertheless the method seems promising and, we hope, opens a path for a series of research lines of maximum interest. Although the paper has dealt only with plane potential problem the extension to plane elasticity as well as to 3-D potential problem is straight-forward.
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O trabalho é um estudo de caso baseado na aná lise crítica do processo de comunicação utilizado pela Vigilância Sanitária de Vitória, ES no desenvolvimento de suas funções e no cumprimento de sua missão de prevenção, proteção e recuperação da saúde da população. Através da aplicação de questionários estruturados com perguntas abertas, semi-abertas e fechadas com funcionários do setor e com uma amostra extraída da lista de contribuintes que receberam o alvará sanitário em 2003 confeccionamos um diagnóstico dos problemas comunicacionais existentes e sugerimos mudanças possíveis. Optamos ter como referencial teórico além da teoria crítica, pesquisas realizadas pelo grupo de pensadores Comunicacionais Latino Americanos porque seus trabalhos se aproximam mais da realidade brasileira. Os resultados obtidos elucidam que a comunicação para a saúde ainda não recebe o reconhecimento necessário nas atividades diárias que visam a saúde coletiva, no caso de Vitória. Confirmamos com a pesquisa a hipótese de que as ações da Vigilância Sanitária não se concretizam sem comunicação eficiente e que muito pode ser feito para melhorar o serviço oferecido se os problemas comunicacionais forem sanados.
Resumo:
O trabalho é um estudo de caso baseado na aná lise crítica do processo de comunicação utilizado pela Vigilância Sanitária de Vitória, ES no desenvolvimento de suas funções e no cumprimento de sua missão de prevenção, proteção e recuperação da saúde da população. Através da aplicação de questionários estruturados com perguntas abertas, semi-abertas e fechadas com funcionários do setor e com uma amostra extraída da lista de contribuintes que receberam o alvará sanitário em 2003 confeccionamos um diagnóstico dos problemas comunicacionais existentes e sugerimos mudanças possíveis. Optamos ter como referencial teórico além da teoria crítica, pesquisas realizadas pelo grupo de pensadores Comunicacionais Latino Americanos porque seus trabalhos se aproximam mais da realidade brasileira. Os resultados obtidos elucidam que a comunicação para a saúde ainda não recebe o reconhecimento necessário nas atividades diárias que visam a saúde coletiva, no caso de Vitória. Confirmamos com a pesquisa a hipótese de que as ações da Vigilância Sanitária não se concretizam sem comunicação eficiente e que muito pode ser feito para melhorar o serviço oferecido se os problemas comunicacionais forem sanados.
Resumo:
By switching the level of analysis and aggregating data from the micro-level of individual cases to the macro-level, quantitative data can be analysed within a more case-based approach. This paper presents such an approach in two steps: In a first step, it discusses the combination of Social Network Analysis (SNA) and Qualitative Comparative Analysis (QCA) in a sequential mixed-methods research design. In such a design, quantitative social network data on individual cases and their relations at the micro-level are used to describe the structure of the network that these cases constitute at the macro-level. Different network structures can then be compared by QCA. This strategy allows adding an element of potential causal explanation to SNA, while SNA-indicators allow for a systematic description of the cases to be compared by QCA. Because mixing methods can be a promising, but also a risky endeavour, the methodological part also discusses the possibility that underlying assumptions of both methods could clash. In a second step, the research design presented beforehand is applied to an empirical study of policy network structures in Swiss politics. Through a comparison of 11 policy networks, causal paths that lead to a conflictual or consensual policy network structure are identified and discussed. The analysis reveals that different theoretical factors matter and that multiple conjunctural causation is at work. Based on both the methodological discussion and the empirical application, it appears that a combination of SNA and QCA can represent a helpful methodological design for social science research and a possibility of using quantitative data with a more case-based approach.
Resumo:
When a gas is introduced at high velocity through a nozzle into a packed bed, it creates a raceway in the packed bed. It has been found that the raceway size is larger when it is formed by decreasing the gas velocity from its highest value than when it is formed by increasing the gas velocity. This phenomenon is known as raceway hysteresis. A hypothesis has been oroposed to explain the hysteresis phenomenon based on a force-balance approach which includes frictional, bed-weight, and pressure forces. According to this hypothesis, the frictional force acts in different directions when the raceway is expanding and contracting. In this article, the entire packed bed has been divided into radial and Cartesian co-ordinate systems, and the forces acting on the raceway have been solved analytically for a simplified one-dimensional case. Based on the force-balance approach, a general equation has been obtained to predict the diameter of the raceway for increasing And decreasing velocities. A reasonable agreement has been found between the theoretical predictions and experimental observations. The model has also been compared with published experimental and plant data. The hysteresis mechanism in the packed beds can be described reasonably by taking into consideration the direction of frictional forces for the increasing- and decreasin-velocity cases. The effects of the particleshape factor and void fraction on the raceway hysteresis are examined.
Resumo:
O trabalho é um estudo de caso baseado na aná lise crítica do processo de comunicação utilizado pela Vigilância Sanitária de Vitória, ES no desenvolvimento de suas funções e no cumprimento de sua missão de prevenção, proteção e recuperação da saúde da população. Através da aplicação de questionários estruturados com perguntas abertas, semi-abertas e fechadas com funcionários do setor e com uma amostra extraída da lista de contribuintes que receberam o alvará sanitário em 2003 confeccionamos um diagnóstico dos problemas comunicacionais existentes e sugerimos mudanças possíveis. Optamos ter como referencial teórico além da teoria crítica, pesquisas realizadas pelo grupo de pensadores Comunicacionais Latino Americanos porque seus trabalhos se aproximam mais da realidade brasileira. Os resultados obtidos elucidam que a comunicação para a saúde ainda não recebe o reconhecimento necessário nas atividades diárias que visam a saúde coletiva, no caso de Vitória. Confirmamos com a pesquisa a hipótese de que as ações da Vigilância Sanitária não se concretizam sem comunicação eficiente e que muito pode ser feito para melhorar o serviço oferecido se os problemas comunicacionais forem sanados.
Resumo:
O trabalho é um estudo de caso baseado na aná lise crítica do processo de comunicação utilizado pela Vigilância Sanitária de Vitória, ES no desenvolvimento de suas funções e no cumprimento de sua missão de prevenção, proteção e recuperação da saúde da população. Através da aplicação de questionários estruturados com perguntas abertas, semi-abertas e fechadas com funcionários do setor e com uma amostra extraída da lista de contribuintes que receberam o alvará sanitário em 2003 confeccionamos um diagnóstico dos problemas comunicacionais existentes e sugerimos mudanças possíveis. Optamos ter como referencial teórico além da teoria crítica, pesquisas realizadas pelo grupo de pensadores Comunicacionais Latino Americanos porque seus trabalhos se aproximam mais da realidade brasileira. Os resultados obtidos elucidam que a comunicação para a saúde ainda não recebe o reconhecimento necessário nas atividades diárias que visam a saúde coletiva, no caso de Vitória. Confirmamos com a pesquisa a hipótese de que as ações da Vigilância Sanitária não se concretizam sem comunicação eficiente e que muito pode ser feito para melhorar o serviço oferecido se os problemas comunicacionais forem sanados.