نتایج جستجو برای: water solutions
تعداد نتایج: 870059 فیلتر نتایج به سال:
Water supply is a major problem in the Adriatic islands, especially during the summer tourism season, and represents a limiting factor to the islands' further economic development. Much attention has been given to water supply solutions, primarily in terms of attempting to use the existing island water. Unfortunately, few islands have favourable hydrological conditions to accumulate significant...
In this paper, a numerical solution is presented for one-dimensional unsaturated flows in the subsurface. Water flow in the subsurface, however, is highly nonlinear and in most cases, exact analytical solutions are impossible. The method of reference-operators has been used to formulate a discrete model of the continuum physical system. Many of the standard finite difference methods and also th...
In this paper we study a shallow water equation derivable using the Boussinesq approximation, which includes as two special cases, one equation discussed by Ablowitz et al [Stud. Appl. Math., 53 (1974) 249–315] and one by Hirota and Satsuma [J. Phys. Soc. Japan, 40 (1976) 611–612]. A catalogue of classical and nonclassical symmetry reductions, and a Painlevé analysis, are given. Of particular i...
The cell water content determines the cell volume, which in turn controls numerous cellular functions. The mean volume of rat glioma cells was electronically measured under isotonic and anisotonic conditions. Two types of isotonic solutions were used containing either high or low concentrations of NaCl, KCl or N-methylglucamineCl. In low salt solutions, osmolarity was maintained constant by the...
in this research, the accelerated ripening of the kabkab dates from khalal to tamr using nacl and acetic acid solutions was studied. fruits at khalal stage were harvested and washed with distilled water before being treated with ripening inducers: 1. nacl solutions, 2. acetic acid solutions and 3. aqueous solution of nacl (1%) and acetic acid. moisture, ph, colour, brix and textural firmness of...
A mathematical solution for solute transport in a three-dimensional porous medium with a patch source under steady-state, uniform ground water flow conditions was developed by Domenico (1987). The solution derivation strategy used an approximate approach to solve the boundary value problem, resulting in a nonexact solution. Variations of the Domenico (1987) solution are incorporated into the so...
In urban and suburban areas, stormwater runoff is a primary stressor on surface waters. Conventional urban stormwater drainage systems often route runoff directly to streams and rivers, thus exacerbating pollutant inputs and hydrologic disturbance, and resulting in the degradation of ecosystem structure and function. Decentralized stormwater management tools, such as low impact development (LID...
A full analytical description of graviosmotic volume flows is presented. This was done with the use of theoretical models earlier developed on the basis of interferometric studies of graviosmotic systems. The description includes both stationary and non-stationary graviosmotic flows induced with solutions whose density decreases as well as increases with increasing concentration. The obtained e...
Anthropogenic marine debris (AMD) is frequently studied on sandy beaches and occasionally in coastal waters, but links between these two environments have rarely been studied. High densities of AMD were found in coastal waters and on local shores of a large bay system in northern-central Chile. No seasonal pattern in AMD densities was found, but there was a trend of increasing densities over th...
Although speech-language pathologists in the schools are being encouraged to provide services more inclusively, they often express concern that they are becoming like classroom teachers and are "watering down" the therapy they should be providing to students on their caseloads. This article explores these concerns and offers solutions to the role confusion and dissatisfaction of many speech-lan...
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