Abstract Transmembrane flux measurements are the only practical tools used to evaluate degree of organic fouling and efficiency chemical cleaning ultrafiltration membranes in situ. Tangential pH-streaming potential profiles may become a comprehensive situ method analyse versus membrane damage. A parallel implementation two methods was assist tuning an efficient protocol for 300 kDa polyethersul...

We consider the problem of sorting n numbers that contain only k distinct values. We present a randomized arbitrary CRCW PRAM algorithm that runs in O(logn) time using n log k logn processors. The same algorithm runs in O ( logn log logn ) time with a total work of O(n(log k) ) for any fixed > 0. All the stated bounds hold with high probability.

SUMMARY 1) The use of presence/absence data is a valid method for comparing communities from hard shore marine environments where the biota is relatively sessile. It is an extensively used method in botanical surveys and its use should be extended into the marine environment. 2) Blackhead had the highest species richness and the widest range of species diversity, suggesting a diversity of habit...

Patterns of fish distribution in French Polynesia were studied at several spatial scales: a single transect (with 280 species, 22 stations), on Moorea Island; several transects on the same island (171 species, 14 stations) and transects from 5 islands including Moorea (189 species, 10 stations). There were significant variations in abundance, richness and composition of species among sites with...

1. The role played by Atta species as ecosystem engineers remains poorly investigated despite previous evidence that their nests can impact plant assemblages. 2. In a large remnant of Atlantic forest, we compared forest structure at 36 Atta cephalotes nests to control sites and assessed shifts in microclimate along transects from nests up to 24 m into the forest (11 representative colonies). 3....

—Northern white cedar (Thuja occidentalis L.) stands throughout the upper Midwestern United States have failed to recruit individuals to the canopy consistently for several decades. To examine local and landscape factors that influence cedar regeneration we recorded the abundance of cedar seedlings and saplings in 24 lowland cedar stands in the Chequamegon-Nicolet National Forest, Wisconsin, du...

Revised 2003 (see the various sections for authors). In this section we give various parameters for common detector components. The quoted numbers are usually based on typical devices, and should be regarded only as rough approximations for new designs. More detailed discussions of detectors and their underlying physics can be found in books by Ferbel [1], Grupen [2], Kleinknecht [3], Knoll [4]...