We report a novel and inexpensive method to provide high resolution vertical measurements of temporally integrated organic contaminants in surface and sub-surface waters in polluted coastal environments. It employs a strip of polyethylene deployed as a passive sampler. Verifications are confirmed via conventional spot sample analyses and against Performance Reference Compound (PRC) calibration ...

near-surface variations can be very complex and may distort amplitudes and arrival times of the reflections events from target reflectors. near-surface complexities include topographic variations, near-surface irregularities, variations in soil conditions and the weathered layer. these perturbations generally have a significant impact on seismic recordings. although there is a general agreement...

This report evaluates a vacuum-assisted walled percolation sampler preconditioned in soil, and examines the dynamic response of leachate solutes. The 20-cm walled percolation sampler extracted soil water under continuous tension via a ceramic cup collector embedded in a silica flour layer, whose upper surface interfaced with field soil. In the laboratory, alternating solutions with high and low...

Duke et al. (1970) developed a mercury manometer and electrode-based controller for a soil water sampler A vacuum applied to soil water percolation samplers permits collecsystem. When coupled with a soil tensiometer, the detion of both macroand matrix-pore liquids. Performance of these field samplers is improved when the extraction vacuum is adjusted in vice automatically adjusted vacuum levels...

Recent years have witnessed amazing outcomes from “Big Models” trained by “Big Data”. Most popular algorithms for model training are iterative. Due to the surging volumes of data, we can usually afford to process only a fraction of the training data in each iteration. Typically, the data are either uniformly sampled or sequentially accessed. In this paper, we study how the data access pattern c...

in this study, the experimental analysis on the bare hull resistance coefficient of submarine at snorkel depth is represented. the experiments are conducted in marine laboratory of admiral makarov university. the results are presented for surface condition and snorkel condition. snorkel depth is regarded equal to one diameter of submarine hull beneath the water surface as usual in submarines. p...

In this study, the experimental analysis on the bare hull resistance coefficient of submarine at snorkel depth is represented. The experiments are conducted in marine laboratory of Admiral Makarov University. The results are presented for surface condition and snorkel condition. Snorkel depth is regarded equal to one diameter of submarine hull beneath the water surface as usual in submarines. P...

Technologies and technical means for investigation of subglacial lakes in Antarctic is a new developing scientific direction, which today has no clearly established methodology. Based on the developed technology drilling access well to lake Vostok its penetration as analysis existing methods devices bottom sediment sampling, basic model sampler with walking-type mover, capable moving along diff...

We describe a novel adaptive mesh representation for streak-surfaces. The surface is represented as a mesh of small trees of initial depth zero (treelets). This mesh representation allows for efficient integration, refinement, coarsening and appending of surface patches utilizing the computational capacities of modern GPUs. Integration, refinement, and rendering are strictly separated into effe...