Sound survey

Obtaining an accurate and detailed depth-age relationship for an ice core is, of course, a necessary task for learning paleoclimate histories. Approximate time scales can be calculated using numerical models of ice and heat flow for the core site (Reeh, 1989), constrained by estimates of the modem accumulation rate and by measurements of ice thickness from radio-echo-sounding surveys. 

The Special Issue of Resource Geology on the Hishikari deposits (Shikazono et al., 1993) includes various aspects of the Hishikari deposits (oxygen isotopes of gangue minerals, hydrothermal alteration, precipitation sequence, fluid inclusions, vertical electric profiling and electric sounding surveys, structural geological analysis, opaque minerals. 

III) The correlation between the observed molecular changes in the genome (SNPs) and the phenotypic response (resistance) is as high as possible. A sound survey should be conducted to determine whether different mechanisms of resistance exist and how... 

Monitoring Determine the sound level of machines and operations by methods such as sound surveys, full-shift dosimetry, use of insurance carriers, or reliance on information from equipment manufacturers and technical literature. 

The cost of hydrographical survey due to the technological development of echo sounding survey systems is still getting cheaper. Since last 10 years the cost dropped down about six times. 

Guidelines on t ualily management and quality system elements Test code for the measurement of airborne noise emitted by rotating electrical machines Engineering method for free field conditions over a reflecting plane Survey method Determination of sound power levels of noise sources 14004/1991 BS EN ISO 9004/1994-1/1994 BS 7458-1/1991 BS 7458-2/1991 B.S 4196 9004/1987 1680-1/1986 1680-2/1986. 3740... 

The existing buildings that have been found, during the structural survey, to be structurally sound and which will be retained ... 

William RT, Alfred LL (1927) The chemical effects of high frequency sound waves 1. A Preliminary Survey. J Am Chem Soc 49 3086-3100... 

The pioneering work on the chemical applications of ultrasound was conducted in the 1920 s by Richards and Loomis in their classic survey of the effects of high frequency sound waves on a variety of solutions, solids and pure liquidsQ). Ultrasonic waves are usually defined as those sound waves with a frequency of 20 kHz or higher. The human ear is most sensitive to frequencies in the 1-5 kHz range with upper and lower limits of 0.3 and 20 kHz, respectively. A brief but useful general treatment of the theory and applications of ultrasound has been given by Cracknel 1(2). 

In this chapter we will be concerned mainly with the formation of high polymers of isobutene, and with the fundamental studies aimed at the elucidation of this reaction. There is no doubt that many useful hints of fundamental interest are to be found in the patent literature, but in most cases the purity of the reagents and the reaction conditions are so ill defined, that no conclusions can be drawn from findings reported in patents. The ratio of scientifically valuable to dubious information in patents is so small that detailed survey of them, in the hope of discovering sound information, should be a most unrewarding occupation. This is more or less true of all chemical patents, but especially so in this particular field where minute traces of impurities can effect catastrophic changes in the reaction pattern. For this reason attention has been confined to work published in the scientific literature. 

Acoustics—Determination of Sound Power Levels of Noise Sources—Precision Methods for Broad-Band Sources in Reverberation Rooms Acoustics—Determination of Sound Power Levels of Noise Sources—Engineering Methods for Free-Field Conditions Over a Reflecting Plane Acoustics—Determination of Sound Power Levels of Noise Sources—Survey Method... 

In southeast Alaska we extensively surveyed the Icy Straits cross sound areas and - to a lesser extent - the Ketchikan area. Basically we found toxic dinoflagellates everywhere we looked. Although quantitative results were not as clear cut as we may have hoped, it appears that toxic dinoflagellate cysts are widespread and tend to concentrate in the fine sediment found in "holes" or "pockets" in the ocean bottom. Unfortunately, this appears to be the case even in the vicinity of supposedly "safe" beaches where shellfish seem to be protected only by serendipitous hydrology and/or environmental conditions. Thus the... 

A note of caution must be sounded with regard to the absolute values of therapeutic or toxic blood phenytoin levels, for these may differ markedly depending on the method and place of assay. A recent survey revealed large variations between results obtained by several laboratories, which on occasions, were as great between those employing the same type of analytical process (for example GLC) as between laboratories using other techniques. 

ISO 3746, Acoustics — Determination of sound power levels of noise sources using sound pressure — Survey method using an enveloping measurement surface over a reflecting plane. 

Lindsay, R. B. (1982). Relaxation processes in sound propagation in fluids a historical survey. In Physical acoustics XVI (ed. W. P. Mason and R. N. Thurston), pp. 1-36. Academic Press, London. [76, 77]... 

To answer the above question new results have been obtained by the study of very fast protolytic reactions in aqueous solution. These were carried out during the last few years by means of relaxation methods (sound absorption, dispersion of the dissociation field effect, temperature jump method) (for a survey cf. [3]). The neutralization reaction HgO+ -j- OH- - (Ha0)8 is the most characteristic example. It was possible to determine the rate constant of this reaction by measuring the time dependence of the dissociation field effect of very pure water of specific conductivity of 6 7 10-8 (at 25°C). 

The quantity of expls required will vary according to the depth of water and tenacity of the rock. Usually 0.5 to 2.5kg are required per m3 of rock. As a guide, 1 kg/m3 should be suitable for reasonably hard rock under 9 to 12m of water. Preliminary examination and survey by diver and sounding is usually required before determining drilling patterns, charge quantities and methods (Ref 5)... 

It has already been noted (Section 10.4.5) that the addition of phen to nickel dithizonate 3400 mol m-2) gives a more intensely coloured blue complex, Ni(HDz)2phen ( max = 4900). Very many such mixed complexes have been introduced into analytical practice79 and the literature has been surveyed by Babko82 and Ueno2 there have been several attempts to place the subject on a sound theoretical basis.79 Some typical examples are shown in Table 7. 

Fiber glass - [GLASS] (Vol 12) - [REINFORCED PLASTICS] (Vol 21) -borate m pORON COMPOUNDS - BORON OXIDES, BORIC ACID AND BORATES] (Vol 4) -borate m [BUILDING MATERIALS - SURVEY] (Vol 4) -for sound absorption [INSULATION, ACOUSTIC] (Vol 14) -use m ablative materials [ABLATIVE MATERIALS] (Vol 1) -use m conveying equipment [CONVEYING] (Vol 7) -use of oxygen for [OXYGEN] (Vol 17)... 

In petroleum exploration, reflection seismic surveying is the method predominantly used. The seismograph records variations in the way rocks reflect sound waves sent downward from a surface source. The reflected sound waves vary with the type, depth, density, and dip of the rocks encountered. The returning sound waves made from a series of points along the survey path can then be displayed graphically to form a seismic record for interpretation by earth scientists. These principles are diagrammed and explained in Fig. 8. 

Fig. 9, Seismic survey using a truck-mounted vibrator as the energy source for creating reflected aeons Lie sounds. This method is used in sensitive areas near cities and along highways because disturbance to the environment is minimal, (.American Petroleum Institute)...

Lighthill, M. J. 1956 Viscosity effects in sound waves of finite amplitude. Surveys in mechanics. Cambridge University Press. 

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