Attrition of sample members from a longitudinal survey can undermine the quality of the data and its research potential, especially when the sample members who drop out are different from those who do not.People who move house are more likely to drop out of the survey as they are harder to locate, and once located, may be harder to interview in the

With the rapid development of economy, the competition of tourism culture and tourism commodities is becoming more and more fierce, and the traditional national culture is also impacted, and color touch 7/97 its historical value is gradually hidden.Traditional cultural elements have strong cultural attributes and influence charm, so it is particula

This paper briefly introduced the theory and framework of geospatial site selection (GSS) and discussed the application and framework of artificial neural networks (ANNs).The related literature on the use of ANNs as decision rules in GSS is scarce from 2000 till 2015.As this study found, ANNs are not only adaptable to dynamic changes but also capab

Papillomaviruses have evolved over many millions of years to propagate themselves at specific epithelial niches in a range of different host species.This has led to the great diversity of papillomaviruses that now exist, and to the appearance of distinct strategies for epithelial persistence.Many papillomaviruses minimise the risk of immune clearan