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11.
Mehdi Dadkhah Glenn Borchardt Mohammad Lagzian Giorgio Bianciardi 《Publishing Research Quarterly》2017,33(2):183-187
The current status of academic publishing is worrying. Cybercriminals are now targeting academic audiences, making it necessary to inform both editors and authors about such issues. The latest involves bogus impact factors, which are challenging scholarly publishing. Legitimate impact factors are used by authors and editors to get a general idea of the audience, if any, for a particular piece or journal. The bogus metrics only add confusion in support of the cybercrimes of their initiators. In this paper, we discuss bogus impact factors, victim countries, and try to clarify the phenomena for both authors and editors. 相似文献
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Abstract To evaluate visitors' use of the exhibitions and the communication strategy of the Milan Natural History Museum, we compared results gathered with two methods, based respectively on the timing of visitors and on the unobtrusive observation of exhibit‐use behaviors. We collected data from a sample of 100 groups of visitors (not guided), randomly selected at the museum entrance. We recorded the following data for each group: halls visited, length of stay in each hall, any kind of behavior showing visitor/exhibition interaction and the displays where interactions occurred. The study shows that visiting time does not give enough information about the actual use of exhibits by the audience. The investigation of visitor/exhibition interactions revealed itself to be the most usual method to describe the visitors' use of the exhibitions. The most important factor influencing visits to the Milan Natural History Museum is the communication technique used in the exhibition areas. 相似文献
15.
Principal component analysis of colour measurements of patinas and coating systems for outdoor bronze monuments 总被引:1,自引:0,他引:1
Principal Component Analysis (PCA) was applied on colour measurements performed on outdoor bronze patinas and protective coating systems on bronze coupons in order to monitor natural weathering and cleaning effects. PCA chemometric technique is shown to be a powerful tool to analyse the large measurement data set which is needed to characterise these kinds of system. The results are compared with previous work where the CIELAB L*a*b space was used, in order to spot the advantages and disadvantages of both techniques and how they can complete each other in order to set up a workflow when dealing with large datasets of colour measurements. As previously stated, quicker colour variations in the early stage of natural weathering of bronze coupons are characterised, which is mainly due to lightness reduction. PCA analysis helps to visualise the different behaviour upon cleaning procedure of different monument patinas and colour difference reduction due to cleaning. It gives the advantage in a first screening phase to possibly highlight the presence of outliers, check the level of noise in the spectra, and select the variables which carry more information. Its integration in a workflow for colour measurement can help in speeding up the process of later analysing data with the well-established CIELAB system. 相似文献
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Practical classification problems often involve some kind of trade-off between the decisions a classifier may take. Indeed, it may be the case that decisions are not equally good or costly; therefore, it is important for the classifier to be able to predict the risk associated with each classification decision. Bayesian decision theory is a fundamental statistical approach to the problem of pattern classification. The objective is to quantify the trade-off between various classification decisions using probability and the costs that accompany such decisions. Within this framework, a loss function measures the rates of the costs and the risk in taking one decision over another. 相似文献
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Gabriel Lima-Oliveira Gian Luca Salvagno Elisa Danese Giorgio Brocco Gian Cesare Guidi Giuseppe Lippi 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2014,24(3):359-367
Introduction:
The contamination of serum or lithium heparin blood with ethylenediaminetetraacetic acid (EDTA) salts may affect accuracy of some critical analytes and jeopardize patient safety. The aim of this study was to evaluate the effect of lithium heparin sample contamination with different amounts of K2EDTA.Materials and methods:
Fifteen volunteers were enrolled among the laboratory staff. Two lithium heparin tubes and one K2EDTA tube were collected from each subject. The lithium-heparin tubes of each subject were pooled and divided in 5 aliquots. The whole blood of K2EDTA tube was then added in scalar amount to autologous heparinised aliquots, to obtained different degrees of K2EDTA blood volume contamination (0%; 5%; 13%; 29%; 43%). The following clinical chemistry parameters were then measured in centrifuged aliquots: alanine aminotranspherase (ALT), bilirubin (total), calcium, chloride, creatinine, iron, lactate dehydrogenase (LD), lipase, magnesium, phosphate, potassium, sodium.Results:
A significant variation starting from 5% K2EDTA contamination was observed for calcium, chloride, iron, LD, magnesium (all decreased) and potassium (increased). The variation of phosphate and sodium (both increased) was significant after 13% and 29% K2EDTA contamination, respectively. The values of ALT, bilirubin, creatinine and lipase remained unchanged up to 43% K2EDTA contamination. When variations were compared with desirable quality specifications, the bias was significant for calcium, chloride, LD, magnesium and potassium (from 5% K2EDTA contamination), sodium, phosphate and iron (from 29% K2EDTA contamination).Conclusions:
The concentration of calcium, magnesium, potassium, chloride and LD appears to be dramatically biased by even modest K2EDTA contamination (i.e., 5%). The values of iron, phosphate, and sodium are still reliable up to 29% K2EDTA contamination, whereas ALT, bilirubin, creatinine and lipase appear overall less vulnerable towards K2EDTA contamination. 相似文献18.
Giorgio Sirilli 《Research Policy》1984,13(2):63-83
In recent years a number of “science indicators” have been constructed in order to gain deeper insight into the working and the impact of scientific and technological systems. Most of these indicators, drawing on data which are usually collected from various sources with different purposes, lack, to a certain extent, coherence and sometimes comparability.A more integrated approach was adopted in the study underlying this paper: the data were gathered from the principal figure in the innovation process, i.e. the researcher. A sample of researchers working in Italian industry were interviewed and supplied information on, amongst other things, their activities and the relative results. Not surprisingly, the results of this survey do not necessarily conform with other sources currently available. However, it should be realized that the information provided by the researchers, although inherently biased, is far more detailed, and represents a valuable source of knowledge of the situation not only of the single persons involved but also of the organization in which they operate.The obvious lesson is that only through the cross-checking and the integration of data coming from different types of sources is it possible to achieve a reliable and faithful picture of the complex phenomenon under review.In the paper an analysis is made of the various activities performed by researchers in Italian industry (research, development, control, design, technical assistance, organization, updating, consultancy, etc.) and of the technological objectives of such activities (new or improved products, processes, materials). Data are also shown on the criteria which researchers judge more suitable in evaluating their performance, as well as on the researchers' output in terms of articles, monographs, papers presented at conferences, patents and inventions. 相似文献
19.
We use data from a nationally representative survey of Italian graduates to study whether Alma Mater matters for employment and earnings 3 years after graduation. We find that the attended college matters, and that there are important college-related differences, both among and within regions of the country. These differences, however, do not persist over time and are not large enough to trigger substantial mobility flows from poorly performing to better performing institutions. We also find evidence that going to a private university pays off at least in the early part of a career. Only part of this gain can be explained by the fact that private universities have lower pupil–teacher ratios than public institutions. 相似文献
20.
Allan B. de Guzman Reena-Jane D. Dangoy Kathleen Christian V. David Ken Jarrett H. Dayo Keisha A. de Claro Giorgio von Gerri G. de Guzman 《Educational gerontology》2013,39(3):260-276
Nurses play a significant role in geriatric care. However, as the aging population and demand for geriatric nurses increase worldwide, shortages of nurses seem to arise. This creates the need to assess and address the motivation and attitudes of nurses toward geriatric care. The intent of this qualitative study is to surface the essence or the “lebenswelt” that describe the motivation and attitudes of a selected group of Filipino nurses toward geriatric care. A total of six registered nurses who had experienced taking care of elderly patients voluntarily participated as respondents of this study. A two-part instrument developed by the researchers was made to elicit necessary data and information. The first part comprised of the robotfoto intended to establish the baseline characteristics of nurses under study. The second part consisted of a semistructured individual in-depth interview using “aide memoire” to probe into the motivation and attitudes of the nurse respondents. Field texts were phenomenologically reduced via repertory grid. Two distinct and interesting themes, namely Geriatric Service Motivation Typology and the Yin-Yang of Geriatric Attitudes emerged. The first theme includes the Single Loop and Double Loop type of motivation The former involves a transactional and unidirectional process, while the latter constitutes a two-way relational and transformational process. The second theme consists of a harmonious combination of the two sides of the nurses' attitudes toward geriatric care. Through this study, the human side of nursing is seen and captured, thus increasing the awareness and knowledge of nurses, improving provision of optimum geriatric care, and inspiring nurses to pursue geriatric nursing with a yearning to serve the elderly with and from the heart. 相似文献