1,721,358 research outputs found
Overuse injuries in kitesurfing
No full textPurpose: Kitesurfing is one of the world’s fastest-growing Olympic
aquatic sports. However, previous scientific literature on this sport has
mainly focused on acute injuries 1. Therefore, this study aimed to
capture a picture of the burden of overuse injuries in kitesurfing.
Methods: Active kite-surfers regularly completed an online questionnaire
describing the health of their shoulders, lower back and
knees and any injury-related symptoms. We adopted the focused-onsymptoms
approach validated by Clarsen et al. 2. We separated acute
from overuse injuries in the dataset based on telephone interviews.
The self-reported number of hours spent practising kitesurfing was
collected, as was the primary kitesurfing discipline each participant
engaged in. We analysed the data using SAS (Statistical Analysis
Software, Cary, NC) version 9.4 for analysis. Relationships between
the binary status of having reported an injury or not and having
reported a severe injury or not were tested for association with BMI
using logistic regression (PROC LOGISTIC). Approval to conduct
this study was given by the institutional Ethics Committee of the
second author, and all participants gave informed consent.
Results: Forty-three participants (age: range 21–55, mean: 39, SD:
8.9; BMI: range 15–19, mean: 23 SD: 2.8) completed a total of 304
questionnaires, covering a total period of 2,096 distinct person-days.
Person-days of reduced participation related to shoulder, lower back
and knee problems were 8%, 3% and 8% of the total, respectively.
Performance was limited due to shoulder, lower back and knee
problems in 11%, 22% and 16% of person-days, respectively. In 20
overuse injuries, it was possible to apply the Orchard Sports Injury
Classification System OSICS10; they included: shoulder muscle
strain (4), knee subluxation, biceps tendon lesion, patellar
tendinopathy, pain post PCL reconstruction, pain post ACL reconstruction,
lumbar pain nor otherwise specified (5), Patellofemoral
impingement (2), Piriformis syndrome (2), pain post shoulder surgery,
iliotibial band syndrome.
Conclusions: Overuse injuries emerged as a significant predictor of
reduced participation, decreased performance and discomfort in
kitesurfing. The prospective survey method captured a picture of
overuse injuries in kitesurfing not previously described. Epidemiological
data reported in this paper are essential to underpin the
creation of specific training programs to prevent injuries and improve
comfort and performance in this sport.
Acknowledgements: This study has benefited from the support of the
international association EXTREMESPORTMED–
www.extremesportmed.org
References:
1. International Kiteboarding Association. 1st International Action
Sports & Exercise Medicine Congress, Malcesine (VR), Italy,
12-13 July 2019.
2. Clarsen B, et al. Br J Sports Med, 2013. 47(8): p. 495–502
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
The incidence of pediatric and adolescent concussion in action sports : A systematic review and meta-analysis
Full text linkBackground: This was a systematic review and meta-analysis of the incidence of concussion risk in youth athletes involved in action sports (AS). Methods: A search of PubMed and Web of Science (from January 1980 to August 2020). Titles, abstracts, and full text were screened according to predefined inclusion criteria to find relevant studies. Moreover, the methodological quality of the studies selected was assessed. Results: Nineteen of 1.619 studies were included in the systematic review and 14 in the meta-analysis. Motocross, sailing and snowboarding presented the highest incidence rates per 1000 athlete exposure at 39.22, 3.73 and 2.77 respectively, whereas alpine skiing had the lowest incidence rates resulting in 0.30. Overall risk of concussion was estimated at 0.33 (CI: 0.22, 0.45). Regarding the methodological quality, we have to report that 26.3% of the studies reported the definition of concussion while 36.8% presented age and gender-specific incidence rates. The mechanism of injury and follow up were reported only in one study. Conclusions: There are significant differences in the rates of incident youth concussion across AS. Despite some limitations, the data from this research can serve as the current sport-specific baseline risk of concussion among youth athletes who practice action sports
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
MONITORAGGIO DELLE CAVE DI SALZANO2009 – 2010RAPPORTO INTERMEDIO DELLE ATTIVITA’
No full textLe ex cave senili di Villetta di Salzano sono Sito d’Importanza Comunitaria (SIC) in relazione alla direttiva CEE 92/43 del 21/05/1992, cosiddetta direttiva “habitat” e Zona di Protezione Speciale (ZPS) in relazione alla direttiva CEE 79/409 del 02/04/1979, cosiddetta “direttiva uccelli”. All’interno degli interventi finanziati con la Legge 139/1992 IIIa fase per il disinquinamento della Laguna di Venezia, il Consorzio di Bonifica Dese-Sile ha avviato la progettazione degli “Interventi di riqualificazione ambientale del bacino del Canale Scolmatore del fiume Marzenego e interventi sugli affluenti. Completamento Rio Roviego e sistemazione idraulica Rio Storto”. L’obbiettivo generale è quello di eseguire un’opera di riqualificazione ambientale del bacino del Canale Scolmatore del Fiume Marzenego, con particolare riferimento alle cave di Salzano, comprese fra le aste fluviali del Marzenego e del Rio Roviego. Lo scopo principale di questi interventi consiste nel ridurre il carico inquinante (azoto totale, fosforo totale e solidi sospesi totali) sversato all’interno della Laguna di Venezia dai corsi d’acqua appartenenti al bacino scolante del Marzenego, mediante l’impiego di tecniche di ingegneria naturalistica e fitodepurazione.
La soluzione progettuale più opportuna per gli obiettivi, era rappresentata dalla realizzazione di una area umida ricostruita (constructed wetland) ubicata all’interno delle “ex cave di argilla di Salzano”, essendo però questa un’area dalle valenze ambientali specifiche (area SIC/ZPS) l’intervento di ricostruzione è stato basato soprattutto sulla reintroduzione di tipologie vegetazionali esistenti nell’area, scegliendo le zone di intervento in modo da preservare le specie vegetali importanti naturalmente instauratesi nelle cave di Salzano negli ultimi 20 anni.
Il programma di monitoraggio dell’area umida ex cave di Salzano è stato pensato in moda da acquisire una serie storica di dati di qualità delle acque con cadenza mensile nelle stazioni di ingresso e di scarico e informazioni sul funzionamento dell’ecosistema ricostruito sia nella sua prima fase di sviluppo sia quando esso arriverà a maturazione
Cognitive-Cognitive Dual-task in aging: A cross-sectional online study
Full text linkThe prevalence of neurodegenerative disorders, particularly dementia, is on the rise across many countries worldwide. This negative trend calls for improving our understanding of cognitive aging. While motor-cognitive dual-task approaches have already been proven valuable for clinical diagnosis, comparatively less research is available on the application of Cognitive-Cognitive Dual-Tasking (CCDT), across several cognitive domains. Moreover, there is limited understanding about how healthy aging affects performance in such dual-tasks in the general population. CCDT entails engaging individuals in multiple cognitive tasks simultaneously and holds promise for remote e-Health interventions. In this cross-sectional study, our objective was to evaluate the suitability of a newly developed, self-administered, online tool for examining age-related differences in memory performance under dual-tasking. 337 healthy adults aged 50-90 underwent a visual memory test (Memo) under both single and dual-task conditions (attend to auditory letters). Additional measures included questionnaires on subjective memory complaints (MAC-Q), on cognitive reserve (CR), and a cognitive screening (auto-GEMS). As expected, the accuracy of visual memory performance exhibited a negative correlation with age and MAC-Q, and a positive correlation with CR and auto-GEMS scores. Dual-tasking significantly impaired performance, and its detrimental effect decreased with increasing age. Furthermore, the protective effect of cognitive reserve diminished with advancing age. These findings suggest that the commonly observed age-related increase in dual-task costs is not universally applicable across all tasks and cognitive domains. With further refinement, a longitudinal implementation of this approach may assist in identifying individuals with a distinct cognitive trajectory and potentially at a higher risk of developing cognitive decline
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