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Gianna Giachi Chiara Capretti Nicola Macchioni Benedetto Pizzo Ines Dorina Donato 《Journal of Cultural Heritage》2010,11(1):91-101
The aim of the work is to set up a methodological approach to verify the effectiveness of the treatments of decayed waterlogged archaeological wood and to point out the proper thermo-hygrometric conditions for its preservation after treatment. The treatments were performed on wood samples of maritime pine (Pinus pinaster Aiton), oak (Quercus sp. caducifolia), elm (Ulmus cf. minor) and strawberry tree (Arbutus unedo L.), obtained from stems pertaining to the original vegetation found in the excavation site of the Ancient Ships in Pisa (Italy), and dated from seventh century BC to second century AD The utilised products were: Polyethylene Glycols (PEG) of various molecular weights, a Polypropylene Glycol (PPG 425), Trehalose (α-D-glucopyranosyl-α-D-glucopyranoside), and their mixtures, and also a Hydroxypropylcellulose (Klucel). The main objective to be pursued by the treatments was considered the stabilisation of the original size and shape of samples. The various steps of this approach were: the execution of a preliminary diagnostic survey on untreated samples; the characterisation of treatment solutions ‘as such’ to establish the property to be monitored during the treatment; the evaluation of the main physical characteristics of wood after the treatment were determined. Among the latter, the coefficient of dimensional stability during the exposure to a series of selected thermo-hygrometric conditions and the retention of consolidants after the treatment. These two measurements allowed the definition of the ‘efficacy of a treatment’, φT, a new parameter firstly utilised in this work. It measures the stabilisation capability of the percent unit of retained product, and its value permits to put in evidence the consolidants that stabilise wood with the lowest amount of product. Conversely, it was not possible to measure the Anti-Shrink Efficiency (ASE), one of the most utilised parameters for the evaluation of treatments, because of the serious distortions and fractures observed in all the heavily degraded untreated samples. 相似文献
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Inflectional morphology and dyslexia: Italian children’s performance in a nonword pluralization task
Maria Vender Federica Mantione Silvia Savazzi Denis Delfitto Chiara Melloni 《Annals of dyslexia》2017,67(3):401-426
In this study, we present the results of an original experimental protocol designed to assess the performance in a pluralization task of 52 Italian children divided into two groups: 24 children with developmental dyslexia (mean age 10.0 years old) and 28 typically developing children (mean age 9.11 years old). Our task, inspired by Berko’s Wug Test, had the aim of testing the subjects’ ability to apply pluralization rules to nonwords in the morphologically complex context of Italian nominal inflection. Results demonstrate that dyslexics display poorer morphological skills in comparison to controls, showing lower accuracy in the task. Furthermore, the dissimilar performances reported by the subjects in the different conditions indicate that the ability to inflect nonwords depends on factors such as the rule’s productivity, frequency, and opacity with respect to gender. Finally, the children’s performance in this task was significantly related to their reading proficiency, and it could predict accuracy in word reading independently of phonological awareness and working memory. 相似文献
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Chiara Andrá Paulina Lindström Ferdinando Arzarello Kenneth Holmqvist Ornella Robutti Cristina Sabena 《International Journal of Science and Mathematics Education》2015,13(2):237-259
We use eye tracking as a method to examine how different mathematical representations of the same mathematical object are attended to by students. The results of this study show that there is a meaningful difference in the eye movements between formulas and graphs. This difference can be understood in terms of the cultural and social shaping of human perception, as well as in terms of differences between the symbolic and graphical registers. 相似文献
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Dario Varin Cristina Riva Crugnola Paola Molina Chiara Ripamonti 《European Journal of Psychology of Education - EJPE》1996,11(2):215-229
This study investigated how the age of entry into regular group day care may influence, in the context of other relevant variables, some short-time outcomes of this experience. In particular the study focused on behaviours expressing well-being or discomfort in the day care environment during the third year. Subjects were 129 young children who were enrolled in group day care when they were 6–29 months old. During their third year their social behaviour was evaluated by caregivers with the Day Care Adaptation Scale. Researchers observed 54 of the children in reunion with their parents. The quality of care was rated with the ITERS scale. It was found that children who started day care in the intervals 6–12 months and 18–23 months displayed more frequently difficult reunions with their mothers, and were rated as less resistant to frustration. Children who started day care from 12–17 months showed lower relational distress. Some significant relationships were found between the ratings of ITERS and the Day Care Adaptation Scale. These findings are discussed with reference to theories of attachment. 相似文献
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National and state child care policies are shaped in part by studies of child care quality. The majority of these studies focus on variables that influence child outcomes. Katz suggests that this is but one of four perspectives on child care quality, and that parents, children, and child care staff have perspectives on child care quality that have not been adequately addressed. This article reviews the variables, measures, and studies associated with each of these four perspectives. The authors argue that given the preponderance of studies conducted from the professional/researcher perspective, more effort should be directed to studying child care quality from parents' children's, and child care staff members' viewpoints. 相似文献
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In this interpretive study of children’s social interactions in a family child care setting, children were seen to spend a
significant portion of their time playing, watching others play, and distracted by video games. When children were focused
on video games, their interactions with one another were disjointed, rushed, and ineffective. Because children’s interactions
are considered to be important learning opportunities, the prevalence of video games in child care settings and the implications
of their use should be studied more closely. 相似文献
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We analyze the acquaintances of a sample of academic inventors and their paired controls to investigate the contribution of social networks to the generation of inventive ideas in academe. Prior to patenting, inventors work in networks of similar dimension and structure as those of their colleagues who do not invent. The ego-networks of the inventors are however more cohesive (denser), a circumstance that is often seen as associated to the exchange of more fine-grained information and to a greater climate of trust which facilitates long-term relationships and learning. Over time, both inventors and non-inventors extend their networks and become more central. In general, we found no evidence that after patenting inventors isolate or close their networks. 相似文献
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This research aims to study the ontologization process of the Romani minority in Abruzzo region (Italy), characterized by the longstanding presence of a group of sedentary Romani, and to test the cross-categorization approach using a specific dependent measure such as the ontologization of the Italian Romani target. A questionnaire was administered to 475 Italian participants, in which the respondents were asked to attribute 6 human positive, 6 human negative, 6 animal positive and 6 animal negative associates to three targets: Italians (ingroup), Italian Romani (ingroup–outgroup) and Romani (outgroup). Participants showed evidence that they used human/animal associates differently for the ingroup and for the outgroup members. Romani groups were ascribed more animal than human characteristics, while Italians were described as more human than the Romani and Italian Romani group, showing the ontologization process of the Romani minority and the superhumanization of the Italian ingroup. Moreover, the cross-categorized Italian Romani target was the most discriminated against in that it was attributed more animal negative associates than the Romani and Italian ones. Since modern racism could take the form of the denial of the humanness and the attribution of animality to outgroup members, our data emphasize the importance of taking account of the persistence of negative attitudes so deep-rooted as those felt towards the Romani. 相似文献