Species turnover and its components related to replacement and nestedness form a significant element of diversity that is historically poorly accounted for in conservation planning. To inform biodiversity conservation and contribute to a broader understanding of patterns in species turnover, we undertook a floristic survey of 160 plots along an 870 km transect across oligotrophic sandplains, ex...

WeChat, an instant messaging app, is considered a mega app due to its dominance in terms of usage among Chinese smartphone users. Nevertheless, little is known about its externality in regard to the broader app market. Our work estimates the spillover effects of WeChat on the other top-50 most frequently used apps in China through data on users’ weekly app usage. Given the challenge of determin...

Sport is widely believed to have a positive impact on quality of life. Sport events are perceived as elements of a city’s destination attractiveness for tourists and residents. However, socio-cultural impact studies of sporting mega-events, although limited, indicate that there may be a variety of positive as well as negative impacts for the quality of life for residents of a sport mega-event h...

Two kinds of elimination disorders can be associated with Vesico Ureteral Reflux (VUR): pure bladder elimination disorders or combination of bladder and bowel elimination disorders. An elimination disorder is always a factor which worsens the prognosis of VUR, as it increases the risk of infectious complications and thus presents a threat for the upper urinary tract. Regarding pure bladder elim...

BACKGROUND It remains unknown whether and when the hosting of mega-sport events increases quality of life of host city residents. The aim of this study is to assess the changes in quality of life of host city residents over the course of hosting a mega-sport event until three months after the event, depending on residents' perception of the atmosphere during the event. METHODS The study was c...

BACKGROUND Juxtaarticular giant cell tumors around the knee are common and pose a special problem of reconstruction after tumor excision. This article analyzes the functional outcome after resection of juxtaarticular giant cell tumors around the knee and replacement by custom mega prosthetic arthroplasty. MATERIALS AND METHODS One hundred and forty-three patients with juxtaarticular giant cel...


 In this paper, the generation way of three-direction grid prestressed reticulated mega- structure is studied, and mega-structure composite joint specific formation ideas are proposed. The important control parameters determined, geometric modelling method hexagon across middle octagon side Coordinate formula hexagonal octagonal joints derived to ensure reasonable arrangement uniform stre...