A common strategy to assign keywords to documents is to select the most appropriate words from the document text. One of the most important criteria for a word to be selected as keyword is its relevance for the text. The tf.idf score of a term is a widely used relevance measure. While easy to compute and giving quite satisfactory results, this measure does not take (semantic) relations between words into account. In this paper we study some alternative relevance measures that do use relations between words. They are computed by defining co-occurrence distributions for words and comparing these distributions with the document and the corpus distribution. We then evaluate keyword extraction algorithms defined by selecting different relevance measures. For two corpora of abstracts with manually assigned keywords, we compare manually extracted keywords with different automatically extracted ones. The results show that using word co-occurrence information can improve precision and recall over tf.idf.
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A common strategy to assign keywords to documents is to select the most appropriate words from the document text. One of the most important criteria for a word to be selected as keyword is its relevance for the text. The tf.idf score of a term is a widely used relevance measure. While easy to compute and giving quite satisfactory results, this measure does not take (semantic) relations between words into account.
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Preventie in de keten. Doel: kennis over schoolloopbanen van (risico) leerlingen in Noord-Oost Twente Keywords: leesvermijding, leesplezier, leesmotivatie
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Keywords: technology adoption; telecare systems; user acceptance; quality of experience
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Keywords: lateral flow assays; forensic investigation; body fluid identification; illicit drugs analysis; explosives analysis
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This chapter discusses the following keywords for learning outcomes for Collaborative Online International Learning (COIL). 1. Clarity: Knowing what you want your students to achieve. 2. Shared: Designed together with your partner to match your course content. 3. Aligned: Linking different components (outcomes, assessment, and activities) of your COIL project together.
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The visual representation of Information System (IS) artefacts is an important aspect in the practical application of visual representations. However, important and known visual representation principles are often undervalued, which could lead to decreased effectiveness in using a visual representation. Decision Management (DM) is one field of study in which stakeholders must be able to utilize visual notations to model business decisions and underlying business logic, which are executed by machines, thus are IS artefacts. Although many DM notations currently exist, little research actually evaluates visual representation principles to identify the visual notations most suitable for stakeholders. In this paper, the Physics of Notations framework of Moody is operationalized and utilized to evaluate five different DM visual notations. The results show several points of improvement with regards to these visual notations. Furthermore, the results could show the authors of DM visual notations that well-known visual representation principles need to be adequately taken into account when defining or modifying DM visual notations.
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Objective: In myocardial perfusion single-photon emission computed tomography (SPECT), abdominal activity often interferes with the evaluation of perfusion in the inferior wall, especially after pharmacological stress. In this randomized study, we examined the effect of carbonated water intake versus still water intake on the quality of images obtained during myocardial perfusion images (MPI) studies. Methods: A total of 467 MIBI studies were randomized into a carbonated water group and a water group. The presence of intestinal activity adjacent to the inferior wall was evaluated by two observers. Furthermore, a semiquantitative analysis was performed in the adenosine subgroup,using a count ratio of the inferior myocardial wall and adjacent abdominal activity. Results: The need for repeated SPECT in the adenosine studies was 5.3 % in the carbonated water group versus 19.4 % in the still water group (p = 0.019). The inferior wall-to-abdomen count ratio was significantly higher in the carbonated water group compared to the still water group (2.11 ± 1.00 vs. 1.72 ± 0.73, p\0.001). The effect of carbonated water during rest and after exercise was not significant. Conclusions: This randomized study showed that carbonated water significantly reduced the interference of extra-cardiac activity in adenosine SPECT MPI. Keywords: Extra-cardiac radioactivity, Myocardial SPECT, Image quality enhancement, Carbonated water
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PURPOSE: As a first step to formulate a practical definition for movement quality (MQ), this study aims to explore how Dutch allied health care professionals (AHCPs) describe MQ of daily life activities in patients with low back pain (LBP).METHODS: In this qualitative cross-sectional digital survey study, Dutch AHCPs (n = 91) described MQ in open text (n = 91) and with three keywords (n = 90). After exploratory qualitative content analysis, the ICF linking rules (International Classification of Functioning, Disability and Health) were applied to classify MQ descriptions and keywords.FINDINGS: The identified meaningful concepts (MCs) of the descriptions (274) and keywords (239) were linked to ICF codes (87.5% and 80.3%, respectively), Personal factors (5.8% and 5.9%, respectively), and supplementary codes (6.6% and 13.8%, respectively). The MCs were linked to a total of 31 ICF codes, especially to b760 'control of voluntary movement functions', b7602 'coordination of voluntary movements', d4 'Mobility', and d230 'carry out daily routine'. Negative and positive formulated descriptions elucidated different MQ interpretations.CONCLUSIONS: Descriptions of MQ given by Dutch AHCPs in patients with LBP cover all ICF components. Coordination and functional movements are seen as the most elementary concepts of MQ. Variation in MQ descriptions and interpretations hinders defining MQ and indicates the necessity of additional steps.
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On the internet we enjoy a continuously growing generation of web applications enabling anyone to create and publish online content in a simple way, to link content and to share it with others. The internet has become a social software platform sailing under the Web 2.0 flag, creating revolutionary changes along the way: the individual, the end-user, comes first and can benefit optimally from an environment which has the following keywords: radically user-oriented, de-centralized, collective and massive. An environment in which each participant not only listens, but can also make his own voice heard: the Social Web.
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