1,720,961 research outputs found
Occupation radiation exposure on radiographers and radiologists: levels and risks at University of Teaching Hospital and cancer disease hospital, Lusaka Zamba
Get PDFMaster of Science in EpidemiologyRadiation exposure and its potential complications is one of the most important issues in occupational health. Implementation of proper occupational health system may have an important bearing not only on the health of the population occupationally exposed to radiation but also on the health and prosperity of the community. The study aimed at analysing the radiation dose received by workers and assessing their perceptions about their exposure.
The study used embedded mixed methods design. Doses for Radiographers, Radiologists, Medical Physists and Nurses working at Cancer Disease Hospital (CDH) and University Teaching Hospital (UTH) were analysed. Thermoluminescent dosimeters (TLD) were used to review radiation doses over a 3-year period (2013-2015. Random effect linear regression model was used to identify potential risk factors of radiation dose. Key informant interviews and semi structured questionnaire were conducted at both sites.
There were 55 records from UTH and 43 from CDH for the quantitative part. For the qualitative part, there were 16 respondents 14 from UTH and 2 key informants from CDH and UTH. About 5.3% of the radiations doses were above the 1.2mSv lower monthly monitoring level. Being female (p-value 0.035) and being at UTH (p-value 0.041) was associated with higher radiation dose. UTH had a mean dose of 0.69 mSv, SD 0.9 (95% CI =0.47- 0.78) and this was higher than CDH which had mean dose of 0.46mSv, SD 0.3 (95% CI= 0.25 -0.364) over the period under review. When the dose exposure was stratified according to sex, women had a higher mean dose of 0.46 mSv (SD 0.3) than Men who had 0.69 mSv (SD 0.4 P-value=0.012.)
Majority of the workers thought that they were being overexposed to radiation. They cited a number of factors that they thought were contributing to these levels including, state of equipment, and human factors.
Occupation radiation exposure at UTH and CDH were found to be within monitoring limits. However about 5.3% of radiation doses were above the 1.2 mSv lower monthly monitoring level. There is need for continued education and training of personnel in principles of radiological protection as well as strengthening the monitoring system
Spatial modelling for health and exposure data - child stunting and blood lead in Kabwe, Zambia
Get PDF
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
- …
