The emissivity of metals and oxides. IV.—Iron oxide     

George K. Burgess  Paul D. Foote 《Journal of The Franklin Institute》1915,179(5):599-600

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The production of available potash from the natural silicites     

Allerton S. Cushman  George W. Coggeshall 《Journal of The Franklin Institute》1912,174(6):663-678

In this paper a summary is given of the various processes which have been proposed for making the potash in the natural silicates available as a fertilizer.Experimental trials of a new rotary kiln process for treating feldspar are described, which depends upon a previous treatment before furnacing, consisting of a method of aggregating or clumping the mix so that chemical contact of the reacting substances is brought about during the subsequent processing. The qualitative and quantitative results obtained on a number of experimental trials on a mill scale of operation are presented and discussed. It is shown that it is possible to economically manufacture a potash fertilizer containing free lime from feldspar, and for a sufficiently low cost to make an industry based upon the method worthy of consideration.  相似文献   

Youth exercise intention and past exercise behavior: examining the moderating influences of sex and meeting exercise recommendations     

Downs DS  Graham GM  Yang S  Bargainnier S  Vasil J 《Research quarterly for exercise and sport》2006,77(1):91-99

The study purposes were to examine: (a) the determinants of exercise intention and past exercise behavior (PEB) using the theories of reasoned action and planned behavior, and (b) the moderating influences of sex and exercise group (meeting or not meeting exercise guidelines). Participants (n = 676 adolescents) completed self-reported measures of their exercise attitude, subjective norm, perceived behavioral control (PBC), intention, and PEB. We found that attitude, subjective norm, and PBC explained 55% of the variance in intention, and intention and PBC explained 51% of the variance in PEB. While we found sex and exercise group differences across the study measures, we did not find evidence of significant moderation. Thus, the theory constructs predicted intention and PEB similarly across sex and exercise groups.  相似文献   

Light-inadequacy of the ultraviolet theory of ionization in the E-layer     

E.F. George 《Journal of The Franklin Institute》1951,252(6):493-500

From the reports of the CRPL, average yearly values of h′_E, h′_F1,f °_E and N_F1, for the months of January, March, June, July, September, and December of the years 1944 to 1949 were computed and plotted against the magnetic latitude. Altogether some 25,000 individual records were averaged. Seven curves were plotted. They showed that: (1) all curves are symmetrical with respect to the magnetic equator; (2) the h′_E, h′_F1, f⁰_E and the N_F, curves all swing up and down as the magnetic latitude, north and south, increases; (3) the h′_E is definitely periodic with constant period and constant amplitude; (4) the h′_E curve rises only slightly (on the average) with latitude. These results appear to be inconsistent with the ultraviolet light theory of ionization.  相似文献   

Buckling of a continuous beam resting on a tensionless elastic foundation     

Christos V. Massalas  George I. Tzivanidis  John T. Katsikadelis 《Journal of The Franklin Institute》1978,306(6):449-455

In this paper, a solution is presented to the buckling problem of a continuous beam resting on a tensionless foundation model that was proposed by Winkler and by Reissner.  相似文献   

Adjacency matrix concepts for the analysis of the interconnection of networks     

William N. Anderson  Richard J. Duffin  George E. Trapp 《Journal of The Franklin Institute》1974,298(1):9-27

A mathematical theory is developed for an imagined device termed a “junctor”. A junctor could be used to interconnect two n-terminal networks giving rise to another n-terminal network. Actually a junctor is itself a simple network with three banks of n-terminals internally connected in some fashion by perfectly conducting wires. Adjacency matrices are formulated to analyze various junctors and their current flows. The main problem treated concerns conditions which would ensure that the junctor operation is associative.  相似文献   

Reviews     

K. A. Percy  George Psacharopoulos  Johan P. Olsen  Michalina Vaughan  Leslie Purdy  K. C. Mukherjee  Max Streit  D. J. Hounsell  Marvin W. Peterson 《Higher Education》1974,3(4):473-478

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Surface wave filters: edited by Herbert Matthews. 521 pages,diagrams, 6×9 in., Wiley-Interscience,New York, 1977. Price, $29.95     

George L. Matthaei 《Journal of The Franklin Institute》1979,308(2):171-172

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Educational disparities in an egalitarian society: The case of Norway     

Athena P. Kottis  George C. Kottis 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1973,19(3):385-395

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Book reviews     

C. Arnold Anderson  John Brennan  Robert H. Rossberg  Noel Entwistle  Max Streit  Gareth Williams  George Psacharopoulos 《Higher Education》1973,2(4):493-500

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