To explore the degree which attentional set in one task interferes with performance in a secondary task, we have developed a prototype SRRI test system. This comprises a central task involving driving through a virtual maze and the presentation of an intermittent stream of competing stimuli of varying levels of salience. Centrally presented arrows are followed in the driving task and the stream...

A portion of Arizona's San Pedro River is managed as a National Riparian Conservation Area but is potentially affected by ground-water withdrawals beyond the conservation area borders. We applied an assessment model to the Conservation Area as a basis for monitoring long-term changes in riparian ecosystem condition resulting from changes in river water availability, and collected multi-year dat...

Stream and riparian groundwater hydrology has been studied in a small intermittent stream draining a forested catchment for a system representative of a Mediterranean climate. The relationship between precipitation and stream runoff and the interactions between stream water and the surrounding riparian groundwater have been analysed under a wide spectrum of meteorological conditions. The hypoth...

The differences between aquatic and terrestrial habitats could change microbial community composition regulate litter decomposition in a subtropical forest, but the linkage remains uncertain. Using phospholipid fatty acids (PLFAs), associated with organisms was monitored to characterize of communities forest floor, headwater stream, intermittent stream. Habitat type did not significantly affect...

Abstract Droughts are recognized to impact global biogeochemical cycles. However, the implication of desiccation on in-stream carbon (C) cycling is not well understood yet. We subjected sediments from a lowland, organic rich intermittent stream experimental over 9-week-period investigate temporal changes in microbial functional traits relation their redox requirements, dioxide (CO 2 ) and metha...

98 Ceylon Medical Journal A 84-year old white man presented with haematuria, intermittent bleeding per urethra and poor urine stream. Cystourethroscopy revealed a wide based nodular tumour in the bulbar urethra. He had bilateral enlarged inguinal lymph nodes and penoscrotal lymphoedema with multiple scrotal skin nodules (Figure). There was no other clinical or radiological evidence of distant m...

27 Twitty 1940; Nussbaum 1969). Our observations suggest that hyporheic zones might provide important and not previously recognized habitats for amphibians in intermittent headwater streams. Additional sampling is needed to better characterize hyporheic use by Dicamptodon and other stream amphibians such as the torrent salamanders (Rhyacotriton spp.). Better information notwithstanding, managem...