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71.
The optimum age for beginning the study of modern languages 总被引:1,自引:0,他引:1
Andersson Theodore 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1960,6(1):298-308
International Review of Education - 相似文献
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Theodore Hatch 《Journal of The Franklin Institute》1933,215(1):27-37
The size distribution data obtained by screen analysis of a non-uniform substance cannot be used directly in calculating the various average diameters of the material since this method of analysis gives the distribution in terms of weight rather than count. The distribution curve by weight however bears a definite relation to the regular size-frequency curve and suitable transformation equations are presented by means of which one is able to calculate the various average diameters from the parameters of the curve given by the screen analysis. The screens are calibrated in terms of the actual size of the material retained rather than the dimensions of the screen openings or an arbitrary method of calculating the “size of separation.” 相似文献
74.
Theodore von Kármán 《Journal of The Franklin Institute》1948,246(6):451-452
75.
Theodore K. Cleveland 《Journal of The Franklin Institute》1928,206(1):120-122
76.
Theodore H. Wasserman 《Psychology in the schools》1977,14(4):471-479
The present study examined the effects of the clock-light cueing device as part of a paradigm designed to control classroom behavior. The results indicated that the clock-light cueing device is an effective instrument in helping to reduce the time spent in disruptive behavior in the classroom. The results further indicated that decreasing the time spent in undesirable behaviors in a classroom does not necessarily decrease the frequency of these behaviors. Implications for treatment and further research are discussed. 相似文献
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The relation between particle size and the degree of polarization of the Tyndall beam created by suspension of non-uniform particulate substances was investigated for three materials (silica, granite, and calcite) ranging in size from one to fifty microns. The degree of polarization was found to be a function of the arithmetic mean diameter of the material. The optical property of birefringence was also found to be a determining factor although its effect was not studied quantitatively. It is shown that by combining the equation expressing the relation between particle size and strength of Tyndall beam with the mathematical relation between degree of polarization and particle size, an indirect method of obtaining a complete definition of particle size is given. Particle size values calculated from observed Tyndall readings and measurements of polarization were found to be within approximately ten per cent. of observed values. 相似文献
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