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spec: We present them in a normalized form since our reader is not interested in the project specific data . Senator Hays will be celebrated later today when his official portrait as Speaker of the Senate is unveiled . The director of volunteers introduced us . Such courses normally fall in the 500 to 599 range , but the numerical designations may vary among academic units . In contrast , aspects of external validity that refer to the comparability between the study population and the general population of interest are often neglected in quality assessment and are usually not considered as having a possible distortive effect on an article 's conclusion [ 10,11 ] . Having noticed that the copyright had expired on the volume that belonged to his great-grandmother , David Newman scanned it onto his Web site in its entirety . Worker involvement in improved quality control is often formalized in quality circles in which groups of workers meet regularly to make suggestions for quality improvement . In the arcane world of academics , status and prestige are very often confused with quality and importance .