scholarly journals When the fingers do the talking: A study of group participation with varying constraints to a tabletop interface

Author(s):  
Paul Marshall ◽  
Eva Hornecker ◽  
Richard Morris ◽  
Nick Sheep Dalton ◽  
Yvonne Rogers
Keyword(s):  
1952 ◽  
Vol 47 (2, Suppl) ◽  
pp. 415-419 ◽  
Author(s):  
Harold B. Pepinsky ◽  
Laurence Siegel ◽  
Ellis L. Vanatta
Keyword(s):  

1982 ◽  
Vol 47 (11) ◽  
pp. 3062-3076 ◽  
Author(s):  
Václav Černý ◽  
Pavel Kočovský

Reactions of the title compounds (bearing an OH, OCH3 or OCOCH3 group at C(19)) involve 5(O)n, 7(O)π,n-participation by the 19-substituent or attack by an external nucleophile. The 6(O)π,n-participation does not occur. The behavior of 1,2-unsaturated (or epoxidated) compounds has been compared with the earlier described 2,3-unsaturated or epoxidated analogs. The 1,2-type is genarally less prone to participation. The reasons for this behavior are discussed.


1982 ◽  
Vol 47 (1) ◽  
pp. 124-129 ◽  
Author(s):  
Pavel Kočovský ◽  
František Tureček ◽  
Václav Černý

The mechanism of perchloric acid cleavage of epoxides I and II was established on the basis of experiments using H2 18O. The 2α,3α-epoxide I gave two products: the cyclic ether V (60%) arising by 5(O)n participation of the 19-acetoxyl and the diol VI (40%). The latter compound is formed by two mechanisms: 1) By direct cleavage of the oxirane ring with H2 18O as external nucleophile and 2) by 7(O)π,n participation via the ion III. Under the same conditions the 5α,6α-epoxide II yielded two diols: The diequatorial diol VIII (96%) arising by 6(O)π,n participation and the diaxial diol IX which is again formed by both direct cleavage of the oxirane ring with H2 18O and by 7(O)π,n participation via the intermediate ion X. The competition of several mechanisms is discussed.


Author(s):  
Joan E. Grusec

This chapter surveys how behavior, affect, and cognition with respect to parenting and moral development have been conceptualized over time. It moves to a discussion of domains of socialization; that is, different contexts in which socialization occurs and where different mechanisms operate. Domains include protection where the child is experiencing negative affect, reciprocity where there is an exchange of favors, group participation or learning through observing others and engaging with them in positive action, guided learning where values are taught in the child’s zone of proximal development, and control where values are learned through discipline and reward. Research using narratives of young adults about value-learning events suggests that inhibition of antisocial behavior is more likely learned in the control domain, and prosocial behavior more likely in the group participation domain. Internalization of values, measured by narrative meaningfulness, is most likely in the group participation domain.


1999 ◽  
Vol 23 (6) ◽  
pp. 356-357
Author(s):  
James R. Hanson ◽  
Peter B. Hitchcock ◽  
Ismail Kiran

The tetracyanoethylene catalysed methanolysis of 17β-acetoxy-4β,5β:6α,7α-diepoxyandrostane afforded 17β-acetoxy-4α,7α-oxido-5β-hydroxy-6β-methoxyandrostane in which the methanolysis product of the 6α,7α-epoxide has participated in the cleavage of the 4β,5β-epoxide; the reaction is modified however by an adjacent 3β-hydroxy group.


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