A comparison has been made between (1) the computed angular scattering coefficient for a polydisperse cloud of small, spherical (Mie) particles and (2) the measured angular scattering coefficient for a polydisperse cloud of irregular, randomly oriented (Mie) particles fitting the same distribution function and having the same material properties. The comparison has been made for eight wavelengths covering the visible range.
A survey of recent literature suggests that the initial failure to obtain recall facilitation when list member cues are presented during free recall can be traced to the absence of three necessary factors: (a) high taxonomic frequency (TF) category instances, (b) blocked presentation order, and (c) a list comprised of many categories. These factors were manipulated in the present study. Cueing was ineffective with low TF instances, but with high TF instances cueing inhibited recall when the list contained 6 categories and facilitated recall when the list contained 15 categories. Presentation order did not influence the effectiveness of cueing.
"When U.S. Government drawings, specifications, or other data are used for any purpose other than a definitely related Governemnt procurement operation, the Government thereby incurs no responsibility nor any obligation whatsoever, and the fact that the Govern- 4 review of sevcral simlinviscid, high-altitudecke plume moesshows t'a~he-Jarvinen-Hill-modelis the most accuratc slleh representation. T'is-modclovffcKsa compact use of the important srza 'Iig parameters, particularly the hypersonic plume scale, L jrockct thru.st/frecstream dynamtc prcssure.--The 11APRAP tJind-tunnel plume measurements have been used to verify the-J.z~ in-en-liAi model and to study the plume viscous mixing layers wvhich simulated flight conditions by matching wind tlinnel. anil flight pluime Knudbcn numbers~Ki .strarmnmean ree; path/f. The 1IAPRAP data simulate typical IC13M sustainer flight in the 120 to 320 kmn altitu-rangc. t! Thc viscous mixing layer location was characterhized by the surface aloni\ which the jet and frecstrcani species are equal. These surfaces,when normalized by T , collapsed towvard a singlc surfae, %uii ich displayed Jarvinen-hlill invise.,d model behavior. in a~dition, viscous influenCes Onl burlacc Ilcations and particle con~untrations along equal conce-ntration surfaces wcre identified. Data at a single point blited the pressbure at thi. burfacu to be approximated by thu Newtonian pressure formula. Plume outer bhock locations, uhlun nurnialiacd by 1. , Showed poor' correlation due to a variety of factors. These 0 hock structures became qiLte weak~ ill the hiigher altitudeL bimulations as KnT; appi nached io-1. rhe inner shock data showed that; die internal scaling of the Jarvincn-l till Mlodel must be improved.FDeviations of the small -scale detailb ol the: plumel mixing-layer btreutulre from continuum behavior arc use' for infer the appearance of rarcfaction effects. For the most rarefied 1lAPl1Al dlata, Kn-10-1 at Al. = 8, the small-scale flow is substantially ra±refied, lio),xeVtr, the large -OeaIL pAlm dimensions ar~Ll aprxmtdb otnuncluain and the plume flowv is in the transitional density regime.The Jarvinen-flill continuum model is useful frr estimating large-scale plume dimensions for Kni < 10-1.IA nomiograph debigmed for quick c-alculations Of these plu1me1 JiMen10ions is accordingly included. Departure ot local plume properties from continuum conditions should bit consiiered for hflL > 10-2. Based on the dlata examined, the development of a ,impilu ilunic model dIc-rilii, buth the meian thierniod)-namic and structural featurus of the mi~ing layer in tihe high-altitude continuum and transitional rocket p~lume appears feasible.DD ~3
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