Relative time dating

Charting of sling line replacement shows an erratic pattern. Some require replacement at a relatively early date and others last several years longer. Early replacements generally show incidental damage, and it is possible that some of the longer lived ones are used beyond the time when they should be replaced. 

Table 12 shows the relative retention time date for the separation of a five-component mixture containing dissimilar structures. 

When an entity begins defining the implementation strategy, high-level milestones are identified and matched with target completion dates. The implementation steps outlined in this chapter are summarized -in a Metrics Implementation Milestone Chart, which illustrates relative timing, in Figure 5.1. 

Ferroelectric liquid crystals are a novel state of matter, a very recent addition to the science of ferroelectrics which, in itself, is of relatively recent date. The phenomenon which was later called ferroelectricity was discovered in the solid state (on Rochelle salt) in 1920 by Joseph Valasek, then a PhD student at the University of Minnesota. His first paper on the subject [1] had the title Piezo-Electric and Allied Phenomena in Rochelle Salt. This was at the time when solid state physics was not a fashionable subject and it took several decades until the importance of the discovery was recognized. Valasek had then left the field. Later, however, the development of this branch of physics contributed considerably to our understanding of the electrical properties of matter, of polar materials in particular and of phase transitions and solid state physics in general. In fact, the science of ferroelectrics is today an intensely active field of research. Even though its technical and commercial importance is substantial, many breakthrough applications may still lie ahead of us. The relative importance of liquid crystals within this broader area is also constantly growing. This is illustrated in Fig. 1,... 

Most chemical iavestigations with plutonium to date have been performed with Pu, but the isotopes Pu and Pu (produced by iatensive neutron irradiation of plutonium) are more suitable for such work because of their longer half-Hves and consequendy lower specific activities. Much work on the chemical properties of americium has been carried out with Am, which is also difficult to handle because of its relatively high specific alpha radioactivity, about 7 x 10 alpha particles/(mg-min). The isotope Am has a specific alpha activity about twenty times less than Am and is thus a more attractive isotope for chemical iavestigations. Much of the earher work with curium used the isotopes and Cm, but the heavier isotopes... 

The standard does not in fact require follow-up audits but clearly if follow-up action is necessary to verify any corrective actions that have been taken, it should do two things verify that the agreed action has been taken and verify that the original nonconformity has been eliminated. Follow-up audits may be carried out immediately after the planned completion date of the corrective action or at some other agreed time. However, unless the audit is carried out relatively close to the agreed completion date, it will not be possible to ascertain if the action was timely. 

To date, only nonrandomized smdies of hemicraniectomy in massive hemispheric stroke have been performed. Rieke et al. found that mortality was reduced from 79% in control patients to 34% in those who underwent DC, with a concomitant reduction in poor functional outcome from 95% to 50%. The mean time interval from stroke to surgery was 39 hours in this study, relatively early in the time course, which may have prevented the patients from having secondary injury due to herniation. Schwab et al. reduced mortality with DC to 16%. Both of these studies, however, found that functional outcome was consistently less improved in the elderly population. The Swedish Malignant Middle Cerebral Artery Infarction Study looked at the long-term (median 3.4 years) outcome... 

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