نتایج جستجو برای: moving sands
تعداد نتایج: 107815 فیلتر نتایج به سال:
Using elementary methods, a positive answer is given to a question of A. D. Sands concerning factorizations of abelian groups. We then indicate how our approach to Sands’s question has its roots in a result on the ergodic theory of infinite measure preserving transformations due to Eigen, Hajian and Ito. 1. SANDS’S PROBLEM AND AN ELEMENTARY SOLUTION In [2], A.D. Sands notes that a positive answ...
The world is moving towards a circular economy that focuses on reducing wastes and keeping materials in use for the longest time possible. This paper critically reviewed three of largest volume landfill waste (tyres, plastics glass) are becoming major concern many countries. At present, crumb rubbers (from tyres) glass sands crushed being used concrete road constructions while often manufacturi...
Experiments were made to determine the effects of sediment size, sediment concentration, and flow velocity on the depositional style of sand-sized particles in a highvelocity surgd. A dimdnsional analysis of the experimental system was performed in an effort to relate the experimental results to deposits from turbidity currents and overwash surges. A large part of each deposit was a result of d...
Understanding the process of adaptation during rapid environmental change remains one of the central focal points of evolutionary biology. The recently formed White Sands system of southern New Mexico offers an outstanding example of rapid adaptation, with a variety of species having rapidly evolved blanched forms on the dunes that contrast with their close relatives in the surrounding dark soi...
AIMS The absence of standardized methods for quantifying faecal indicator bacteria (FIB) in sand hinders comparison of results across studies. The purpose of the study was to compare methods for extraction of faecal bacteria from sands and recommend a standardized extraction technique. METHODS AND RESULTS Twenty-two methods of extracting enterococci and Escherichia coli from sand were evaluat...
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