The network structure of visited locations according to geotagged social media photos

Businesses, tourism attractions, public transportation hubs and other points of interest are not isolated but part of a collaborative system. Making such collaborative network surface is not always an easy task. The existence of data-rich environments can assist in the reconstruction of collaborative networks. They shed light into how their members operate and reveal a potential for value creation via collaborative approaches. Social media data are an example of a means to accomplish this task. In this paper, we reconstruct a network of tourist locations using fine-grained data from Flickr, an online community for photo sharing. We have used a publicly available set of Flickr data provided by Yahoo! Labs. To analyse the complex structure of tourism systems, we have reconstructed a network of visited locations in Europe, resulting in around 180,000 vertices and over 32 million edges. An analysis of the resulting network properties reveals its complex structure.Comment: 8 pages, 3 figure

Asymptomatic players with a patellar tendon abnormality do not adapt their landing mechanics when fatigued

This study aimed to explore how asymptomatic athletes with a patellar tendon abnormality (PTA), who are at high risk of developing patellar tendinopathy, alter their landing technique and net patellar tendon loads generated in response to fatigue. Seven asymptomatic players with a PTA performed five successful vertical stop-jump trials before and after a fatigue protocol. Fatigue protocol involved participants repeatedly performing sets of 30 submaximal jump exercises on a sledge apparatus followed by 30 s rest until the task failure criteria were reached. Three-dimensional ground reaction forces, lower limb kinematics and net peak patellar tendon force were recorded during the stop-jump task. No significant between-fatigue condition differences in net patellar tendon loading, or most secondary outcome variables were observed. Only some fatigue changes were seen during the vertical landing phase. Asymptomatic PTA participants did not modify their landing technique or net patellar tendon loading during a stop-jump task in response to fatigue. The lack of between-fatigue condition differences displayed by the asymptomatic PTA participants during both landing phases suggest that these individuals may not be capable of sufficient movement variability in their landing strategies to adapt to fatigue

Lower limb movement symmetry cannot be assumed when investigating the stop-jump landing

Assumed When Investigating the Stop-Jump Landing. Med. Sci. Sports Exerc., Vol. 44, No. 6, pp. 1123-1130, 2012. Purpose: When investigating lower limb landing biomechanics, researchers often assume movement symmetry between a participant\u27s right and left lower limbs for the simplicity of data collection and analysis, although landing tasks often involve dual-limb motion. However, whether lower limb symmetry can be assumed when investigating dynamic, sport-specific movements such as the stop-jump has not been investigated. Therefore, this study aimed to determine whether there were any significant differences in selected kinetic, kinematic, and muscle activation patterns characterizing lower limb biomechanics displayed by the dominant limb compared with the nondominant limb of participants during a stop-jump task. Methods: Sixteen male athletes with normal patellar tendons on diagnostic imaging performed five successful stop-jump trials. Patellar tendon forces (FPT), ground reaction forces, three-dimensional kinematics, and EMG activity of seven lower limb muscles were recorded for the dominant and nondominant lower limbs during each trial. Results: During the horizontal landing phase, the dominant lower limb sustained a significantly higher FPT and peak net knee joint extension moment compared with the nondominant lower limb. Furthermore, during the vertical landing phase, the dominant lower limb sustained significantly lower vertical but higher posterior ground reaction forces compared with the nondominant lower limb. Other variables did not significantly vary as a function of lower limb dominance. Conclusions: It is recommended that researchers clearly identify their primary outcome variables and ensure that their experimental design, particularly in terms of lower limb dominance, provides an appropriate framework to investigate possible mechanics underlying unilateral and bilateral knee joint injuries during dual-limb movements such as the stop-jump task

SALUT LES COPAINS - JOHNNY HALLYDAY / Johnny HALLYDAY, avec orchestre

Comprend : WAP-DOU-WAP ("Tu aimes le twist") - twist / JIL et JAN et Johnny HALLYDAY - SI TU ME TELEPHONES / G. GARVARENTZ et C. NICOLAS - RETIENS LA NUIT : de la bande originale du film "Les Parisiennes" / Ch. AZNAVOUR et G. GARVARENTZ - NOUS QUAND ON S'EMBRASSE ("High School confidential") / R. HARGRAVE - J. JEE-LEEWIS - JIL et JEAN - TWISTIN' U.S.A. / K. MANN - G. BERTRET et R. DESBOIS - TOI QUI REGRETTES / Johnny HALLYDAY et JIL et JEAN - SAM'DI SOIR : de la bande originale du film "Les Parisiennes" / Charles AZNAVOUR et GARVARENTZ - VIENS DANSER LE TWIST ("Let's twist again") - en français / K. MANN - D. APPELL et G. GOSSET - LET'S TWIST AGAIN ("Viens danser le twist") - en anglais / K. MANN - D. APPELL et G. GOSSET - DOUCE VIOLENCE : de la bande originale du film : "DOUCE VIOLENCE" / G. GARVARENTZ et C. NICOLAS - DANSE LE TWIST AVEC MOI ("Dance the mess around") / K. MANN - D. APPELL et J. DAMBROIS - TU PEUX LA PRENDRE ("You can have her") / B. COOK - A. SALVET et Lucien MORISSE - AVEC UNE POIGNEE DE TERRE ("A hundred pounds of clay") / ELGIN - DIXON ROGERS - REVIL et Manou ROBLIN - IL FAUT SAISIR SA CHANCE : de la bande originale du film "Douce violence" / GARVARENTZ et Charles AZNAVOURBnF-Partenariats, Collection sonore - BelieveContient une table des matière