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Static sampling systems are defined as those that do not have an active air-moving component, such as the pump, to pull a sample to the collection medium. This type of sampling system has been used for over 100 years. Examples include the lead peroxide candle used to detect the presence of SO2 in the atmosphere and the dust-fall bucket and trays or slides coated with a viscous material used to detect particulate matter. This type of system suffers from inability to quantify the amount of pollutant present over a short period of time, i.e., less than 1 week. The potentially desirable characteristics of a static sampling system have led to further developments in this type of technology to provide quantitative information on pollutant concentrations over a fked period of time. Static sampling systems have been developed for use in the occupational environment and are also used to measure the exposure levels in the general community, e.g., radon gas in residences. 

In practice, clay from a soil sample is prepared on a microscope slide, dried, and its X-ray diffraction measured subsequently, the same clay is placed in atmospheres saturated with, for example, glycerol, with subsequent X-ray diffraction, and again the distance between layers determined. Changes in the diffraction pattern or the lack thereof will identify the type of clay present [32],... 

Skim the poem Next Slide, Please, written by Roald fioffmann, who in 1981 shared the Nobel Prize in Chemistry with Kenichi Fukui. In this poem, Hoffmann pokes fun at seminar presentations. The poem serves as an example of a genre that differs in many ways from the scientihc papers written by this world-renowned chemist. 

A second prominent feature here is the ergodic character (or lack thereof) of the process, depending on the rationality or irrationality of <. This leads inevitably to the fascinating question, Does a real system choose between these values of , and if so, how The boundaries themselves remain neutral with respect to the choice of whenever they are compatible with the flow. Thus, for a slide flow, the walls must be parallel to the slides, whereas for a tube flow, they must be parallel to the tube. In both cases there remains an additional degree of freedom, which is precisely the choice of f. Other examples of indeterminancy arise from the neglect of fluid and particle inertia, as already discussed in Section I (see also the review in Leal, 1980). Whether or not inclusion of nonlinear inertial effects can remove the above indeterminacy, as it often does for the purely hydrodynamic portion of the problem, is a question that lies beyond the scope of the present (linear) Stokesian context. 

Core 316920 from the Landsort Deep is one example of disturbed sedimentation and thus unfavorable for comparison to the data of the other areas. At the depth 5-15 cm an abnormal decrease of the curves down to namral backgrounds is visible, indicating sedimentation of older sediments caused by sliding and/or resuspension at the slope of the basin. Anyway, the data are presented here because disturbed sedimentation is quite a normal process in many areas. A selection of cores from different sites of each of the basins (as we have done in the Eastern Gotland Basin) would have been better, but it is sometimes impossible. 

The cardinal rule for effective presentation of experimental data in posters does not really differ from that for preparing slides or overhead transparencies for a talk keep the information per panel to a minimum and make it easy to absorb at a glance. For example, graphical presentation of numerical data is generally more effective than tabulation (be sure the axes are clearly labeled) give structures of compounds rather than names wherever possi-... 

Very small items produced and tested at very high rates (e.g., fasteners, microcircirit chips) can be handled by vibratory bowl feeders, slides, and small conveyors to ensure that they are correctly presented to the inspection device. These systems often have automated disposal mechanisms built in to gate any defective items along a different track from the good items, an example of a materials-handling component equivalent to the human Response function. 

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