Seat depth

FIGURE 10.4 Measurement points for office chairs. (Permission to reproduce figure from EN 1335-1 2000 is granted by the British Standards Institution.) 

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Use 1/16 compression nuts and ferrules from vendors such as Parker, Swagelok, or Rheodyne. These have similar ferrule shapes, which are compatible with each other. Note that Waters and Valeo fittings have different ferrule shape and seating depths and might not be interchangeable with others. 

Make sure that the tubing bottoms out inside the fitting when attaching a new ferrule. See Figure 5.4 for ferrule, shapes and correct seating depths of the various fittings. 

Waters and Valeo fittings have different ferrule shape and seating depths and are not interchangeable with other standard fittings (Figure 5.5a). 

An adjustable office chair that allows variation for seat height, seat depth, seat width, lumbar support, backrest, armrests, and the ability to swivel. These adjustments increase comfort and positioning in supported, neutral positions. To reduce the risk of work-related injuries from long periods of time spent at a desk or on a computer. See also Ergonomics. 

Chairs with seat depths exceeding 16 in. shall provide relief to the back side of the knee (such as contouring). 

Amino (melamine and urea) Melamine formaldehyde (MF) have excellent electrical properties, heat and moisture resistance, abrasion resistance (good for dinnerware and buttons) in high-pressure laminates it is resistant to alkalies and detergents. They are used as the plastic for counter tops. Urea (urea formaldehyde) has properties similar to melamine and is used for wall switch plates, light-colored appliance hardware, buttons, toilet seats, and cosmetics containers. Unlike MFs they are translucent, giving them a brightness and depth of color somewhat similar to opal glass. 

Figure 14 Proton beam irradiation of a deep-seated large tumor. Single Bragg peaks of different energy are combined, in adequate proportions, to obtain a homogeneous dose distribution at the level of the SOBP. The depth-dose curve of a photon beam, shown for comparison, is inferior compared to the proton curve. However, an optimized multifield photon treatment allows to reach better irradiation conditions. (From Ref 43.)...

The surface of a solid is the seat of an asymmetry which causes a change in the binding forces which affects the solid to a considerable depth. The difference in the electron density distribution brings the interior of the crystal into a state of compression and the surface film into a state of tension. The degree of the disturbance of the solid depends upon the asymmetry which the surface introduces into the system. The latter in turn depends upon the environment of the solid and even physical adsorption of inert gases can influence equilibrium properties of small crystals and their films, such as volume, melting point, phase transformation, color, fluorescence, and electronic conductivities. 

From the correlated elements we can construct a model of the chemical composition of the Moon. Whether this model is valid for the entire Moon or only for the upper 500 km, depends on the amount of melting that has occurred in the Moon. Clearly, if below a certain depth there has never been any matter exchange with the upper layers, it is impossible to deduce anything about the composition of this deep-seated matter from studies of the surface rocks. 

DCDL mode, it is possible to locate the anomalous concentrations of Fe " and Mn". But only at low dissolved oxygen concentrations (as a rule, at depths of more than 300 m) is it possible to determine Zn, Ni and other heavy metals (Figs. 2-51, 2-52, 2-53). Use of the more sensitive PPL mode increases the effectiveness of hydrochemical prospecting for deep-seated ore deposits. 

Ancient people regarded the depths of the earth with horror, as the seat of hell and of malignant Gods, due to natural phenomena like earthquakes and volcano eruptions. In ancient times the Romans and in modern times the Icelanders, Japanese, Turks, Koreans, and others have used it for baths and for space heating. 

The usual procedure is to drill the hole, remove the core barrel or other tool, seat the packer, make the test, remove the packer, drill the hole deeper, set the packer again to test the newly drilled section, and repeat the test (see Fig. 15.2a). If the hole stands without casing, a common procedure is to drill it to final depth, fill with water, surge it, and bail out. Then set two packers on pipe or drill stem as shown in Figs. 15.2c and d. The length of packer when expanded should be 5 times the diameter of the hole. The bottom of the pipe holding the packer must be plugged, and its perforated portion... 

On the very crest of the East Pacific Rise, in equatorial latitudes—particularly 12° to 16°S, the sediments are enriched in Fe, Mn, Cu, Cr, Ni, and Pb. The correlation of these areas of enrichment to areas of high heat flow is marked. It is believed that these precipitates are caused by ascending solutions of deep-seated origin, which are probably related to magmatic processes at depth. The Rise is considered to be a zone of exhalation from the mantle of the earth, and these emanations could serve as the original enrichment in certain ore-forming processes. ... 

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