Advantages of measurements

Careful consideration has to be given to all aspects of each approach—such as the reliability, the total cost, and the need for equipment and expertise—before making the final decision. The main advantage of measurements is the reliability of the results, the disadvantage being the need for often expensive equipment. 

The advantages of measuring at very low temperatures are well established [4], Because of the increased speed of data collection, it now becomes feasible to consider the use of liquid helium as a cryogen. A prototype open-flow helium cooling device using mainly off-the-shelf components has been developed [3],... 

The rate of energy transfer is simply the difference in the reciprocal fluorescence lifetimes of the donor, measured in the presence and absence of acceptor. Of course, if we measure the fluorescence lifetime of the donor, we do not have to keep track of the number of donors that have been excited this is a great advantage of measuring lifetimes. 

The i.v. approach has the distinct advantage of measurements being carried out under the most physiological conditions. On the other hand, the caveats include confounding effects of peripheral metabolism, which may give rise to artifactual brain uptake of degradation products. To exclude such a possibility the application of suitable analytical techniques to tissue and plasma samples is required. 

The discussion given in BS 4618, Sections 2.3 and 2.48 on design data for plastics applies in principle to rubbers, and stresses the advantage of measuring resistivity as a function of temperature, humidity, electric stress and time of electrification. 

Steady-state periodic heating and unsteady-state methods can be applied to measure the thermal conductivity and diffusivity of coal. Methods such as the compound bar method and calorimetry have been replaced by transient hot-wire/line heat source, and transient hot plate methods that allow very rapid and independent measurements of a and X. In fact, such methods offer the additional advantage of measuring these properties not only for monolithic samples but also for coal aggregates and powders under conditions similar to those encountered in coal utilization systems. 

Choosing a circular AT-cut quartz plate with a thin metal layer on it in contact with the solution being the working electrode in an electrochemical cell (- electrochemical quartz crystal microbalance, EQCM) provides the advantage of measuring simultaneously surface energy, mass, and charge. 

On the other hand, in the excitation spectrum, the emission intensity 4, at the monitored emission band, is plotted as a function of the wavelength A of the excitation light, w hich varies as the extinction coefficient of the absorbing molecules. Therefore, the excitation spectrum exhibits the same spectral appearance as that of the absorption spectrum. The advantage of measuring the excitation spectrum in addition to the emission spectrum is the greater sensitivity even for low concentrations of photoluminescent material compared to standard absorption measurements. 

The corneal assay consists in positioning an angiogenesis inducer (tumor tissue, cell suspension, growth factor) into a pocket made in the cornea in order to evoke vessel outgrowth from the peripherally located limbal vasculature. This assay, with respect to the other in vivo assays, has the advantage of measuring only new blood ves-... 

Abstract Two examples of the use of measurement uncertainty in a development environment are presented and compared to the use of validation. It is concluded that measurement uncertainty is a good alternative to validation for chemical processes in the development stage. Some advantages of measurement uncertainty are described. The major advantages are that the estimations of measurement uncertainty are very efficient, and can be performed before analysis of the... 

Method validation is a process used to confirm that an analytical procedure employed for a specific test is suitable for the intended use. The examples above show that the estimation of measurement uncertainty is a viable alternative to validation. The estimation of measurement uncertainty can be used to confirm that an analytical procedure is suitable for the intended use. If the estimation of measurement uncertainty is used together with validations both the uncertainty estimation and the validation have their own place in a developmental environment. The major advantages of measurement uncertainty are that it is fast and efficient. Normally, if the analytical method is understood by the laboratory very similar results are found for the estimation of uncertainty and for the classical variation of critical parameters, namely, validation. The decision on how to perform a validation should be made on a case to case basis depending on experience. 

But what are the advantages of measuring compliance in the different phases of development of a drug ... 

An advantage of measuring independently both the exposure time and the interval between exposure and the disappearance of tack is that it allows a separation of the effects of ultraviolet radiation and the effects of heat. 

The advantage of measuring the effect of a surfactant in an interfacial phenomenon by some parameter that is related to the standard free energy change associated with the action of the surfactant in that phenomenon is that the total standard free energy change can be broken into the individual standard free energy... 

The major advantage of measurements on blood is that direct extraction without prior hydrolysis of conjugates is all that is usually needed, and that collection of the sample is rapid and volumetrically reliable. The latter is of importance, but not essential, in allowing the rapid performance of adrenocortical suppression and stimulation tests which are now needed in the differential diagnosis of virilism in women. 

The advantage of measuring airway resistanee is that it is a simple, rapid, and extremely sensitive test of airway caliber, but the major disadvantage is that it cannot distinguish between resistance changes due to obstruetion of the extrathoracic airway (pharynx, larynx, glottis, and trachea) or the intrathoracic airway (bronchi, bronchioles, and alveoli). 

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