Book reviews     

Franz Hilker  Alan C. Purves  Edmund King  Fernand Hotyat  Gordon Bishop  Birger Bromsjö  A. Harry Passow  Willard C. Olson  Gilbert de Landsheere  Douglas M. McIntosh  John I. Goodlad 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1967,13(3):356-376

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A pilot study of the immediate effectiveness of the Frostig-Horne training program with educable retardates     

R M Allen  I Dickman  T D Haupt 《Exceptional children》1966,33(1):41-42

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The protein,calcium, phosphorus,and magnesium content of nursery school lunches including seconds     

COX ML  SPENCE BD  SCOULAR FI 《Child development》1953,24(3-4):181-188

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New worlds: discoveries from our solar system : Werner von Braun and Frederick I. Orday. 284 pages,diagrams, illustrations, 6x9 in., Anchor Press/Doubleday. New York, 1979. Price, $24.95.     

I.M. Levitt 《Journal of The Franklin Institute》1980,309(3):191-192

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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   

Self-evaluation, social reinforcement, and academic achievement of black and white schoolchildren.     

I Katz  O J Cole  R M Baron 《Child development》1976,47(2):368-374

Black and white male schoolchildren covertly evaluated their own performance at a verbal task administered by black and white male experimenters. It was hypothesized that academically successful children would be predisposed to appraise themselves favorably, whereas relatively unsuccessful pupils would be biased toward self-criticism. The covert self-evaluations were assumed to represent at internalization of early experiences of predominantly positive or negative social reinforcement from adult socializing agents. The predicition for self-criticism was upheld in the white experimenter condition but not in the black experimenter condition. Relationships consistent with the theory were found between subjects' self-appraisals and their retrospective reports of positive and negative reinforcements received from parents and teachers in various typical situations. These relationships were more evident for black subjects than for white subjects. The extent to which children's self-praise and self-criticism mediated affect was assessed by means of a color conditioning technique. Contrary to predicition, possibly due to the easy nature of the experimental task.  相似文献   

Structural aspects of controllability and observability—I. tensorial aggregation     

O.I. Franksen  P. Falster  F.J. Evans 《Journal of The Franklin Institute》1979,308(2):79-104

The classical criteria for controllability and observability are given a tensorial formulation which is then extended into Boolean form directly related to a digraph interpretation of system structure. This is examined in detail with particular reference to group theoretic aspects, invariant properties under transformation, the term rank test and the existence of zero eigenvalues.Within this framework the structural design concepts of potential controllability and observability are presented in generalised terms.  相似文献   

Structural aspects of controllability and Sobservability—II. digraph decomposition     

O.I. Franksen  P. Falster  F.J. Evans 《Journal of The Franklin Institute》1979,308(2):105-124

The graph theoretic aspects of controllability and observability are examined and related to the tensorial formulation of Part I of the paper. Particular emphasis is given to the significance of the system digraph decomposition and the relevance of this to certain system algebraic properties of interest in control theory.  相似文献   

Polynomial Root Clustering     

T.A. Bickart  E.I. Jury 《Journal of The Franklin Institute》1979,308(5):487-496

A sequence of tests on derived polynomials to be strictly Hurwitz polynomials is shown to be equivalent to a given (typically real) polynomial having all its zeros in an open sector, symmetric with respect to the real axis, in the left half-plane. The number of tests needed is at most 1 + ?(ln k)/(ln 3)?, where k is the integer associated with the central angle π/k of the sector. An extension of this result on the sector as a region of root clustering is given which shows that only a limited number of tests are needed to verify that the roots are clustered in a region composed as the intersection of a set of primative (sector-like) regions. The results reported evolve from application of a collection of mappings on the complex plane defined by a particular collection of Schwarz-Christoffel transformations.  相似文献   

The effects of extraneous speech on visual vigilance performance of children     

E S Brackup  I J Knopf 《Child development》1978,49(2):505-508

First-grade males performed a 30-min visual vigilance task under 5 conditions of auditory background stimulation. The 5 conditions consisted of (1) continuous conversation, in which subjects listened to a tape of conversation spliced so that there were no intervals of silence lasting longer than 3 sec; (2) continuous reverse, in which subjects heard the continuous conversation tape played in reverse; (3) intermittent conversation, in which subjects heard alternating segments of conversation and silence; (4) intermittent reverse, in which subjects heard alternating segments of reverse conversation and silence; and (5) silence control. Compared with silence or continuous stimulation, intermittent stimulation produced better detection regardless of whether or not it was meaningful. High achievers made more correct detections than low achievers, but only in the second and third time periods. Few subjects made errors of commission.  相似文献