1,721,114 research outputs found
Allergy and sports in children
No full textPhysical activity is beneficial for children with positive outcomes for mental and physical well-being. Allergic conditions unique to the sporting arena may serve as an impediment to participation in physical activity for allergic children. A common example is exercise-induced asthma; less common activity-related allergic conditions include food-dependent exercise-induced anaphylaxis, exercise-induced anaphylaxis, and exercise-induced urticaria. Allergic children may also be at risk of allergic reactions when exposed to allergens that are more commonly found in the sports environment, e.g., latex, sports drinks, and medications such as NSAIDs. Recent advances in our understanding of the patho-physiological and immunologic mechanisms that may account for these conditions have facilitated more effective and safer management strategies. There are also important immunologic lessons to be learnt with respect to specific physical factors that may result in diminished allergen tolerance; indeed, these lessons may facilitate safer allergen desensitisation regimens. The role of the immune system in exercise-induced immunoallergic syndromes, clinical aspects, and diagnostic and therapeutic approaches are discussed in this review
Developoment of a magnetic intra-uterine manipulator
Full text linkCITATION: Doll, S., Scheffer, C. & Du Toit, G. 2013. Developoment of a magnetic intra-uterine manipulator. R&D Journal, 29:11-17.The original publication is available at https://www.saimeche.org.za/page/RDJournalThis paper introduces the concept of a novel
magnetic intra-uterine manipulator, intended to
overcome conventional medical devices’
shortcomings, and enabling non-invasive uterine
manipulation during surgery. However, analyses
have shown that the magnetic manipulator is unable
to compete in terms of the range of motion of the
existing devices. A limited anterior sagittal rotation
range of 60° was observed in a magnetic manipulator
compared to a range of 140° for conventional
devices. Despite these limitations, use of a magnetic
manipulator could eliminate the need for an
additional medical assistant during surgery; it is also
reusable and thus also more economical. The second
goal of the research was to investigate which type of
setup would be most successful in effective uterine
manipulation. Through concept analysis, a cart-onarch
system was deemed most effective. To lift an
effective load of 1 N over an air gap of 150 mm, rareearth
N38 neodymium (NdFeBr) magnets showed the
most promise as magnetic actuators for the
manipulator. Finite Element Analysis (FEA)
simulations of the magnetic set-up were validated
experimentally and produced an acceptable Mean
Absolute Error (MAE) of 0.15 N.https://www.saimeche.org.za/page/RD_2013Publisher's versio
Inappropriately resected cervical carcinoma - a preventable condition?
Full text linkCITATION: Du Toit, G. C. & Van Der Merwe, B. J. 1997. Inappropriately resected cervical carcinoma - a preventable condition?. South African Medical Journal, 87(10):1440-1444.The original publication is available at http://www.samj.org.zaObjective. Description of demographic data and identification of possible preventable causes in patients with inappropriately resected cervical carcinoma. Setting. Unit of Gynaecological Oncology, Tygerberg Hospital. Methods and materials. Retrospective analysis of 45 patients with inappropriately resected cervical carcinoma for the period 1985-1994. Results. Forty-five patients with a mean age of 51.1 years and a mean parity of 5 were included in the study. The majority of patients had early-stage disease (55.5%). Patients managed primarily in non-tertiary facilities had a statistically significant higher incidence of preventable causes (P = 0.0002). The majority of the study population had endocervical adenocarcinoma. The most common reason for preventable inappropriately resected disease was the absence of evaluation of abnormal cervical cytology. Conclusion. Cases of inappropriately resected cervical carcinoma could be reduced if appropriate pre-operative assessment of patients with abnormal cytology is undertaken.Publisher’s versio
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
Full text linkWe 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
- …
