Deductive databases manage large quantities of data and, in general, in a set-oriented way. The existing systems of explanation for deductive databases do not take these constraints into account. We propose a tracing technique which consists of integrating a "relational" trace and an instrumented meta-interpreter using substitution sets. The relational trace eeciently gives precise information ...

A new rainforest tree species of the myrtle family (Myrtaceae), Syzygium nusatenggaraense Sunarti & Y.W.Low is described here based on two collections from Lesser Sunda Islands. This superficially similar to arcanum P.S.Ashton, a Bornean endemic species, but differs in suite morphological characters and geographic distribution. The illustrated, description given.
 Satu spesies pohon hu...

Fruits, are in black or white colour Mrytus communis, is known as locally name murt, hambales, mersin. It an aromatic and medicinal plant that grows naturally maquis form regions with Mediterranean climate. We aimed to investigate the hypoglycemic effect antioxidant activity of Myrtus communis L. this research. White-black myrtle were collected from Hassa-Hatay Tarsus-Mersin, respectively Octob...

The recently described cribellate gradungulid Progradungula otwayensis Milledge, 1997 is endemic to the Great Otway National Park (Victoria, Australia) and known from only one male and a few juvenile specimens. In a recent survey we recorded 47 specimens at several localities across the western part of the Great Otway National park. Our field data suggest that this species is dependant on the m...