1,720,981 research outputs found
Falcioni L, Gallotta MC, Baldari C, Cardinali L, Campanella M, Ferrari D, Guidetti L, Meucci M. Influence of training status on cardiac and vascular functioning in young recreational and competitive male rowers. Frontiers in Pediatrics, section Pediatric Cardiology
No full textIntroduction: The aim of the study was to investigate the influence of training
status on cardiovascular function in young male recreational and competitive
rowers.
Methods: Ejection duration in percentage to the heart rate period (ED%),
subendocardial viability ratio (SEVR), augmentation index at 75 bpm (AIx75) and
carotid to femoral pulse wave velocity (cf-PWV) of competitive rowers (CR) (age
17.6 ± 4.1 years), recreational rowers (RR) (age 16.7 ± 2.70 years) and athletes
practicing other recreational sports (ORS) (age 15.3 ± 1.4 years) were assessed.
Results: ED% was lower in CR compared to ORS (31.9 ± 3.9% vs. 38.4 ± 4.8%; p =
0.026) and cf-PWV was higher in CR compared to ORS (5.5 ± 1.0 m/s vs. 4.7 ±
0.5 m/s; p = 0.032). SEVR was higher in CR compared to RR and ORS (165.8 ±
33.7% vs. 127.4 ± 30.4% and 128.3 ± 27.8%; p = 0.022) and AIx75 was lower in CR
compared to RR and ORS (−15.7 ± 8.6% vs. 1.2 ± 9.9% and 1.5 ± 9.1; p = 0.001).
Discussion: Healthy, young competitive male rowers reported higher myocardial
performance and better cardiovascular health than recreational athletes.
Interpretations of cf-PWV in competitive rowers should be performed alongside
other cardiovascular indicators
Le misure agro-ambientali per l’imboschimento: valutazione dell’impatto sul paesaggio rurale delle Marche e di Urbino
No full textOxygen uptake efficiency slope in healthy normal weight young males: an applicable framework for calculation and interpretation
No full textBackground: The oxygen uptake efficiency slope (OUES) is considered a reliable indicator of cardiorespiratory fitness (CRF) in young and clinical populations who cannot achieve maximal effort during a graded exercise test. However, OUES accuracy depends on the data points used for its calculation and it is still not clear if the submaximal OUES can accurately assess CRF in healthy young males.
Objective. We investigated the association between peak oxygen uptake (VO2peak) and peak and submaximal OUES, and the agreement between submaximal OUES and peak OUES in male adolescents and young adults.
Methods. Fifty normal weight healthy participants (age 14-22 years, VO2peak 43.8 ± 7.3 mL·min-1·kg1) performed a graded exercise test on a cycle ergometer, pulmonary gas exchange was assessed using breath-by-breath analysis. VO2peak, and oxygen consumption (VO2) at the aerobic (AerT) and at the anaerobic threshold (AnT) were determined as the 30-second average of the VO2 values. Peak OUES (up to peak) and submaximal OUES (up to AerT and up to AnT) were calculated from the logarithmic relation between VO2 and pulmonary ventilation.
Results. VO2peak showed higher correlations with peak OUES (r=0.80-0.88) than with the two submaximal OUES (r=0.32-0.81). Peak OUES showed higher agreement with OUES up to AnT (r=0.89-0.93; Typical percentage error 5.9%; Intraclass correlation coefficient = 0.89-0.93) than with OUES up to AerT (r=0.39-0.56; Typical percentage error 15.0%; Intraclass correlation coefficient = 0.38-0.56).
Conclusions. The peak OUES is the best indicator of aerobic fitness in healthy males followed by the OUES up to AnT. The OUES up to AnT is a valid alternative to peak OUES
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
Attività "in vitro" di oli essenziali su Aspergillus Fumigatus
No full textL'azione antimicrobica degli oli essenziali è conosciuta da molti anni e la ricerca di prodotti medicinali naturali ha riportato in auge negli ultimi anni l'aromaterapia. In questo lavoro abbiamo verificato l'efficacia in vitro di 17 oli essenziali nei confronti di un ceppo di Aspergillus fumigatus isolato da un cane con rinosinusite aspergillare Materiali e Metodi: Per la prova è stata utilizzata una tecnica in brodo in agitazione continua (Tampieri e coll, Parassitologia, 44, (suppl.1):178) per favorire il contatto del micelio con l'olio essenziale. Ciascun olio è stato saggiato a 50, 100, 500, 1000, 5000 ppm per valutare la minima concentrazione inibente (MCI) e la minima concentrazione “rallentante la crescita”. Dai flaconi senza crescita apparente sono stati effettuati trapianti, previo lavaggio dell’inoculo in soluzione fisiologica, su piastre di Sabourau Dextrose Agar (BBL) addizionato di 0,05g di Cloramfenicolo per determinare la minima concentrazione letale (MCL). Risultati e conclusioni Tra gli oli essenziali testati, quelli che hanno mostrato la MIC più bassa per A.fumigatus sono stati: Timo Rosso, Origano, Santoreggia, Melissa, Lemongrass, Cannella (500 ppm) la maggior parte di questi oli ha presentato la MCL pari alla MIC, fatta eccezione per Santoreggia, Cannella e Melissa che a 500 ppm sono inibenti, ma solo a 1000 ppm hanno effetto fungicida. Albero del tè, Eucalipto, Lavanda vera, Limone, Pino mugo, Rosmarino, Sandalo e Issopo hanno mostrato i minori effetti sia inibenti che letali (MIC e MLC >= 5000 ppm). L’olio di Menta piperita ha mostrato potere fungistatico (MIC 1000 ppm) ma non fungicida alle concentrazioni prese in esame. Alcuni oli essenziali a concetrazioni più basse delle MIC sono stati in grado di ridurre parzialmente la crescita di micelio, altri sono passati direttamente da una concentrazione non condizionante lo sviluppo del fungo a una inibente la crescita. Confrontando questi dati con quelli ottenuti, con diversa metodica, da Inouye e coll. (2000, Mycoses 43:17-23) si può notare come siano approssimativamente sovrapponibili per gli oli di Albero del te, Lavanda, Lemongrass, mentre c’è notevole discordanza per i risultati di Cannella e Timo, che secondo questi Autori hanno inibito solo lo sviluppo miceliale a una dose di 6300 ppm, senza però causare effetto micocida. I nostri risultati sono in accordo anche con uno studio di Ghfir e coll. (1994, Mycopathologia, 126:163-167), sull’effetto dell’essenza di Isoppo, che ha determinato solo un rallentamento della crescita di A. fumigatus via via maggiore all’aumentare della concentrazione. Questi Autori hanno messo in rapporto la graduale inibizione della crescita fungina con crescenti alterazioni nel contenuto di lipidi del micete, simili a quelle provocate da farmaci antimicotici quali ketoconazolo, imidazolo, triazolo e itraconazolo, gli Autori ipotizzano che il meccanismo di azione dell’essenza di Issopo possa essere analogo a quello delle succitate sostanze antifungine. Poiché la composizione chimica degli oli essenziali è notevolmente variabile, sarebbe necessario approfondire gli studi per valutare quali dei singoli componenti manifestino uno più spiccato potere antimicotico
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
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