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Bast fibres have been commonly used as a textile material in Northern Europe since Neolithic times. However, the process of identifying the different species has been problematic, and many important questions related to their cultural history are still unanswered. For example, a modified Herzog test and the presence of calcium oxalate crystals have both been used in identification. In order to generate more reliable results, further research and advancement in multi-methodological methods is required. This paper introduces a combination of methods which can be used to identify and distinguish flax (Linum usitatissimum), hemp (Cannabis sativa), and stinging nettle (Urtica dioica). The research material consisted of reference fibres and 25 fibre samples obtained from 12 textiles assumed to be made of nettle. The textiles were from the Finno-Ugric and Historical Collections of The National Museum of Finland. The fibre samples were studied by observing the surface characteristics and cross sections with transmitted light microscopy, and by using a modified Herzog test with polarized light, in order to identify the distinguishable features in their morphological structures. The study showed that five out of 25 samples were cotton, 16 nettle, one flax, and one hemp. Findings from two samples were inconsistent. The results show that it is possible to distinguish common north European bast fibres from each other by using a combination of microscopic methods. Furthermore, by utilizing these combined methods, new and more reliable information could be obtained from historical ethnographic textiles, which creates new vistas for the interpretation of their cultural history. 相似文献
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This article presents early evaluation data on the effectiveness of an ethics-based sex education program, the Sexual Ethics for a Caring Society Curriculum (SECS-C), which strives to develop adolescents’ thinking about sex so that they might act ethically in relation to other people and reflect ethically upon sexual messages and events in the world around them. Unlike typical evidence-based curricula that measure prevention goals from a health perspective, effectiveness was measured in terms of attitude change. Seventy-nine 9th graders from 7 diverse classrooms at a charter school received 8 lessons from the curriculum. Pre and post measures assessed belief in rape myths (the Illinois Rape Myth Acceptance Scale) and bystanderism (the Bystander Attitude Scale, Revised (BAS-R)). The students showed improvements with regard to rape myth attitudes but not with regard to their beliefs in the likelihood of intervening in troublesome sexual situations. 相似文献
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We explored relations between students’ epistemic beliefs, metacognitive monitoring and recall performance in the context
of learning physics through metaphor. Eighty-three university undergraduate students completed questionnaires designed to
measure their epistemic beliefs and prior knowledge about Newtonian physics. Students were epistemically profiled as rational,
empirical, or metaphorical in their approaches to knowing. Using a think-aloud protocol, students read a text on Newton’s
First and Third Laws. The text included metaphors as examples of the various laws described. Results revealed that students
profiled as metaphorical engaged in more metacognitive processing compared to students profiled as rational or empirical.
Moreover, path analyses revealed that metacognitive monitoring positively predicted recall performance. Results challenge
Muis’ (2008) consistency hypothesis; the ways in which knowledge is represented in text may be the linking factor for relations between metacognitive monitoring
and epistemic beliefs rather than the underlying epistemology of the domain. 相似文献
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Phonological awareness, phonological memory, and phonological access to lexical storage play important roles in acquiring
literacy. We examined the convergent, discriminant, and predictive validity of these phonological processing abilities (PPA)
in 389 3-, 4-, and 5-year-old children. Confirmatory factor analysis supported the validity of each PPA as separate from general
cognitive ability and separate from each other. Multigroup structural equation modeling (SEM) with mean structure demonstrated
that older preschoolers have better developed latent PPA than younger preschoolers but that the structure of PPA is equivalent.
RAN was found uniquely associated with letter knowledge and text discrimination in younger preschoolers, and PA was found
uniquely associated with word reading skills in older preschoolers. Finally, general cognitive ability was only indirectly
associated with emergent literacy via PPA. These results highlight the importance of PPA in the early literacy development
of English-speaking preschool children. 相似文献
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Jedlic B Hall N Munroe-Chandler K Hall C 《Research quarterly for exercise and sport》2007,78(4):351-363
To investigate whether coaches encourage their athletes to use imagery, two studies were undertaken. In the first, 317 athletes completed the Coaches' Encouragement of Athletes' Imagery Use Questionnaire. In the second, 215 coaches completed a slightly modified version of this questionnaire. It was found that coaches and athletes generally agreed on the relative frequency with which coaches encourage athletes to use imagery across the 4 Ws (i.e., where, when, why, and what). Coaches promoted imagery use more in conjunction with competition than training and injury rehabilitation, and higher-level coaches encouraged imagery use far more than their recreational counterparts. In addition, the level of athlete being coached had a major impact on how much or little coaches encouraged their athletes to use imagery. Coaches encouraged higher level athletes (i.e., international, national, varsity) to use imagery more than club and recreational athletes. 相似文献
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Munroe-Chandler KJ Hall CR Fishburne GJ Strachan L 《Research quarterly for exercise and sport》2007,78(2):103-116
The purpose of this study was to investigate young athletes' imagery use from a developmental perspective. The participants were 110 male and female athletes competing in both team and individual sports. They represented four different age cohorts (i.e., 7-8, 9-10, 11-12, and 13-14 years). Sixteen focus groups, two for each age category and gender, were used as the method of data collection. The findings indicated "where," "when, " and "why" young athletes use imagery and how imagery use changes as children move from early childhood through to early adolescence. Overall, results revealed that all age cohorts reported using imagery in both training and competition and for both cognitive and motivational purposes. The present research also found support for studying imagery use by young athletes from a developmental perspective. 相似文献