中学生の自己意識特性の構造(人文・社会科学篇)

The purpose of this study was to investigate the structure of self-consciousness in junior high school students. 305 junior high school students completed 60 items that were concerned with self-consciousnenss, social anxiety, loneliness, and time perspective for themselves. Factor analysis of 21 items revealed that self-consciousness has such four dimensions as coping self-consciousness, reflective self-consciosness, behavioral style self-consciousness and appearance self-consciousness. The relationship among these four factors and other variables were examined. The results suggested that the structure of self-consciousness in junior high school students consisted of four factors were more fit in comparision with two factors that were public self-consciousness and private self-consciosness

Mechanical characteristics of aged Hinoki (Chamaecyparis obtusa Endl.) wood from Japanese historical buildings Ⅱ

International audienceThis paper deals with the mechanical properties of naturally aged wood and thermally treated wood wood. Naturally aged wood samples delivered from Japanese historical buildings are precise dating with using both radioactive carbon dating 14C and dendrochronology methods. And Hinoki (Chamaecyparis obtusa Endl.) specimens cut out from recently felled down and naturally dried were heated at 90-180 °C as accelerated aging treatment. The general trends in rigidity, Young's modulus and rupture energy might be similer, quantitative differences are likely to be observed between the various kinds of modifications induced by age

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On the aging of Hinoki wood from the Japanese cultural heritage

Wood is a material designed by nature to last as long as it is not attacked by biological agents. It can support trees for centuries, and as a technological material it can again sustain loads for considerable periods. It is, as a consequence, a major component of the cultural heritage of many civilisations and the assessment of wood properties from ancient objects is a question of fundamental and practical interest. One major difficulty for such research is the gathering of suitable samples, with well-defined origin, certified dating and permission of publication by conservation administration. The Japanese context, where traditional uses of wood have been maintained for more than 1600 years, offers a unique opportunity to address the question of wood aging. Hinoki (Chamaecyparis obutusa) samples from Horyuji temple in Nara and other famous historical Japanese buildings have been gathered for more than 10 years by RISH, Kyoto University, expanding a collection gathered in the 50ties by Jaro Kohara. The wood age, defined as the time elapsed since wood formation and estimated by dendrochronology cross-checked with 14C measurements, ranged from 600 to 1700 years. The time elapsed since tree felling was also considered whenever possible. The recent wood used for comparison was selected according to similar origin and quality from craftsman viewpoint. The observations made included bending tests in L and R directions, colour measurements using a spectrophotometer, chemical and thermomechanical analysis