we show that the category of convergence approach spaces is a simultaneously reective and coreective subcategory of the category of latticevalued limit spaces. further we study the preservation of diagonal conditions, which characterize approach spaces. it is shown that the category of preapproach spaces is a simultaneously reective and coreective subcategory of the category of lattice-valued p...

Interactions between intraguild species that act as both competitors and predator-prey can be especially complex. We studied patterns of space use by the black-footed ferret (Mustela nigripes), a prairie dog (Cynomys spp.) specialist, and the American badger (Taxidea taxus), a larger generalist carnivore that competes for prairie dogs and is known to kill ferrets. We expected that ferrets would...

urbanisation is still one of the social themes in developing countries. in china, the rapid process of urbanisation and economic growth bring to people not only more opportunities for creating new life and pursuing happiness, but also the challenge to face various and complex social, economical and environmental problems. among them some are outstanding, like the shrinking plowland devoured by ...

It has been suggested that the larger area of the average female acoustic vowel space is a consequence of compensating for poorer harmonic sampling of the spectral envelope resulting from a higher f0. This predicts that there should be variation in vowel space size within any group of males or females representing sufficient interindividual range of average f0. Inspired by this, the present pap...

the evidence suggests that emotional relationship with the opposite sex has been extended and a large group of juvenile's have experienced social relationships with the opposite sex. the basic problem of study is that how juveniles experienced consequences the relationship with the opposite sex on live? and are consequences the relationship with the opposite sex different or similarity amo...