An introduction to electron optics: by L. Jacob. 150 pages,illustrations, 11 × 17 cm. Methuen's Monographs on Physical Subjects. London,Methuen & Co., Ltd., 1951. Distributed by John Wiley & Sons,Inc. Price, $2.00     

Alan C. Byers 《Journal of The Franklin Institute》1951,252(4):364-365

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Gregor Mendel & his precursors     

ZIRKLE C 《Isis; an international review devoted to the history of science and its cultural influences》1951,42(128):97-104

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Fuels and combustion handbook: edited by Allen J. Johnson and George H. Auth. First edition, 915 pages,illustrations, 15 × 24 cm. New York,McGraw-Hill Book Co., 1951. Price, $12.50     

W.E. Scott  L.C. Conant 《Journal of The Franklin Institute》1951,252(2):206

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The slow neutron-induced radioactivities of nuclear explosions     

C.E. Mandeville 《Journal of The Franklin Institute》1951,252(4):297-308

The slow neutron-induced radioactivities of nuclear explosions have been evaluated for infinite media of filtered Schuylkill water and the earth's crust. The magnitudes of these effects are compared with the activity of the fission fragments, and the conditions under which they may be of importance are considered.It has been assumed that a gram-molecule of neutrons is liberated in the blast.  相似文献   

Pride and Prejudice: an adolescent fairy tale     

Myron C. Tuman 《Children‘s Literature in Education》1980,11(3):129-132

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Modeling of Star-shaped and Parallel-wire Carrier Distribution Systems     

C. Yeh  F. Manshadi  G. Mariki  W.P. Brown 《Journal of The Franklin Institute》1978,305(2):67-78

It is often desirable to represent carrier distribution systems by networks so that analysis can be made to predict the behavior of these systems. Modeling of two canonical carrier distribution systems, the star-shaped system and the parallel-wire system by networks was carried out in this paper. The representation is given in terms of lumped parameters when the lengths of the carrier lines are short and it is given in terms of lumped and distributed parameters when the lengths of the carrier lines are long.  相似文献   

Effects of social comparison on aggression and regression in groups of young children.     

J W Santrock  P C Smith  P E Bourbeau 《Child development》1976,47(3):831-837

The influence of negative, equal, and positive social comparison and of nonsocial comparison upon 4- and 5-year-old black children's subsequent aggressive and regressive behavior in 3-member groups was investigated. The group behavior of boys included more physical agression following negative social comparison than the other treatments, and their group behavior also consisted of more nonverbal teasing behavior following the negative comparison treatment than that of the equal and nonsocial comparison groups. When the behavior of the nontarget partners was controlled, children initiated more physical aggression, nonverbal teasing, and regression after experiencing negative social comparison with the partners than after following the other treatments. There was some evidence to support the reciprocal influence of children's aggressive behavior on each other, particularly for boys following imbalanced social comparison treatments.  相似文献   

The relative efficacy of vestibular-proprioceptive stimulation and the upright position in enhancing visual pursuit in neonates.     

C L Gregg  M E Haffner  A F Korner 《Child development》1976,47(2):309-314

48 healthy neonates born to multiparae were randomly assigned to view a moving stimulus either in the horizontal or the upright position, with or without added vestibular stimulation and with or without pacifier sucking. The infant was shown a moving black line inside a strictly controlled visual environment provided by an apparatus which permitted horizontal and upright positioning and displacement of the infant. Visual tracking was recorded by a concealed TV camera positioned at a constant distance and angle from the infants' eyes in both positions. Quality of tracking during each of 4 trials was scored on a 7-point scale. Results indicate that vestibularproprioceptive stimulation provided to the infant either horizontally or semivertically significantly enhanced his visual tracking, whereas the upright position did not. Pacifier sucking also improved his performace.  相似文献   

Book review     

Jon Lauglo  C. H. Dobinson  Wolfgang Mitter  Ian Lister  G. W. Parkyn  T. Neville Postlethwaite  R. Gardner  Walter Hahn  John Lowe  A. J. Cropley  Georges Belbenoit  Janusz J. Tomiak  Bill Halls 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1976,22(1):107-126

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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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