913 resultados para L86 - Information and Internet Services


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In this paper, we show that aggregate illiquidity is a priced risk factor on the Shanghai Stock Exchange (SHSE). We develop the relationship between the illiquidity factor, asymmetric information, and market decline. Our empirical results show that while the illiquidity factor is a source of asymmetric information on the SHSE, asymmetric information does not trigger market decline.

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Fingertips of human hand play an important role in hand-based interaction with computers. Therefore, identification of fingertips' positions on hand image is vital for developing a human computer interaction system. All most all of the research works for fingertips detection, initially isolate hand image from the background image. Most of these techniques develop color based segmentation methods because human skin color possess an exceptional characterises that can be used to isolate hand from the rest of the image quite easily. Sometimes color image segmentation becomes difficult due to illumination and background variations. To make it simple and reliable, this paper proposes a robust method for detecting fingertips of a hand image based on the combination of color segmentation and circle detection. Due to the characteristics of circularity of fingertips regions of hand boundary, any existing circle detection algorithms can be applied to detect circles at fingertips region. It is difficult to detect fingertips solely based on the circle detection method. For this reason, initially the proposed method detects all the circular regions on the image applying Circle Hough Transformation (CHT) then the fingertips are selected based on the color characteristics of the fingertips regions. Experimental results show that the proposed approach is promising.

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This article draws on data from a three-year Australian Research Council-funded study that examined the ways in which young children become numerate in the twenty-first century. We were interested in the authentic problem-solving contexts that we believe are required to create meaningful learning. This being so, our basic tenet was that such experiences should involve the use of information and communications technologies (ICT) where relevant, but not in tokenistic ways. This article highlights learning conditions in which young children can become numerate in contemporary times. We consider ‘academic’ or ‘school-based’ mathematical tasks in the context of a Mathematical Tasks Continuum. This continuum was conceptualised to enable focused and detailed thinking about the scope and range of mathematical tasks that young children are able to engage within contemporary school contexts. The data from this study show that most of the tasks the children experienced in early years mathematics classes were unidimensional in their make up. That is, they focus on the acquisition of specific skills and then they are practiced in disembedded contexts. We suggest that the framework created in the form of the Mathematical Tasks Continuum can facilitate teachers thinking about the possible ways in which they could extend children’s academic work in primary school mathematics, so that the process of becoming numerate becomes more easily related to authentic activities that they are likely to experience in everyday life.

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Health literacy is a multidimensional concept covering a range of cognitive and social skills necessary for participation in health care. Knowledge of health literacy levels in general populations and how health literacy levels impacts on social health inequity is lacking. The primary aim of this study was to perform a population-based assessment of dimensions of health literacy related to understanding health information and to engaging with healthcare providers. Secondly, the aim was to examine associations between socio-economic characteristics with these dimensions of health literacy.

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The aim of the study was describe the experiences, needs and preferences of recent inpatients of a rehabilitation centre, and the needs of their families. Data were collected in four focus groups, two with patients (n = 13) who had recently completed inpatient rehabilitation following an illness, injury or elective surgery, and two with family members (n = 11). During the focus groups, two researchers facilitated discussion on any topic that participants considered important to the experience of inpatient rehabilitation; participants were encouraged to describe their care, needs and preferences. The focus group discussions were audio-taped and transcribed verbatim. Field notes were hand recorded. Data were analysed and collated into themes. Six key themes emerged. Participants wanted: interactions with friendly, empathetic staff; regular contact with senior staff and all staff to introduce themselves by name and profession; timely communication of accurate information; and rehabilitation services seven days a week. The physical environment had both positive and negative effects on patient well-being. Patients with complex or atypical circumstances required special attention to ensure their needs were met. In conclusion, patients and families identified six important issues that need to be considered during inpatient rehabilitation.

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BACKGROUND: The use of antiseptic hand rubs (AHRs), rather than washing with soap and water, is considered to be the gold standard for reducing the frequency of nosocomial infections, as well as being less damaging to the hands than washing with soap and water, but little is known at a population level about usage patterns for AHRs. OBJECTIVES: To describe AHR use patterns among workers in the health and community services industry in Australia. METHODS: Using data from a population-based survey of Australian workers, we focused on health and community services workers' exposure to chemicals at work, including the use of AHRs. Data regarding the frequency of hand-washing were also collected. RESULTS: Nine hundred and fifty-six health and community service workers participated in the Australian National Hazard Exposure Worker Surveillance survey. Of these, 11% reported using AHRs, and 31% reported hand-washing >20 times per shift. According to an adjusted logistic regression model, professional workers [adjusted odds ratio (aOR) 2.29, 95% confidence interval (CI): 1.40-3.72] and frequent hand washers (aOR 3.08, 95%CI: 1.92-4.93) were more likely to use AHRs. CONCLUSIONS: AHR use by health and community service workers was generally lower than expected. AHR use was most likely to be reported by professionals and frequent hand washers, suggesting that AHRs are used as an adjunct to conventional hand-washing.