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Enrico Quagliarini Federica Bondioli Giovanni Battista Goffredo Antonio Licciulli Placido Munafò 《Journal of Cultural Heritage》2013,14(1):1-7
Titanium dioxide (TiO2) can be used to realize transparent self-cleaning coatings on stone surfaces as an active and preventive protection system, limiting cleaning and maintenance actions, reducing their costs in Architectural Heritage. This self-cleaning ability is due to photo-induced hydrophilicity on treated surfaces. The aim of this investigation is to analyze this effect, since it could bring to a greater water absorption, a potential source of damage for stone surfaces. Titania sol, obtained by sol-gel and hydrothermal processes, was deposited on travertine by spray coating, in two different ways. Water absorption by capillarity, static contact angle and a specific surface water absorption analysis were assessed before and after the TiO2 treatments. The effects of deposited amount of titania on the characteristics of treated surfaces were evaluated. It was shown that there were no evident changes in the substrate reactivity without ultraviolet (UV) light exposure, while it seems that hydrophilicity due to UV light does not lead to higher water absorption, thus encouraging the use of TiO2 coatings in the field of Architectural Heritage. However, before widely applying this conservative treatment, some further researches are recommended in order to better assess its durability and sustainability. 相似文献
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Valentina Lo Cascio Giovanni Guzzo Francesco Pace Ugo Pace 《International Journal for Educational and Vocational Guidance》2013,13(2):135-149
In this study, we explored the unique and common contributions of anxiety, self-esteem, and family communication on indecisiveness among adolescents. Three hundred and fifty pupils from 13 to 16 years of age completed self-report measures on indecisiveness, quality of family communication, trait anxiety, and self-esteem. The findings in this study showed that students’ indecisiveness is predicted by family communication mediated by anxiety and self-esteem. These results have important implications for practice as it stresses the importance of anxiety and self-esteem. Nevertheless, the counselors could also focus on enhancing relationship-building skills by introducing the adolescents’ career formation as an adolescent–parent joint project. 相似文献
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Andrea Principi Joop Schippers Gerd Naegele Mirko Di Rosa Giovanni Lamura 《Educational gerontology》2013,39(2):144-158
ABSTRACTThe purpose of this study was to investigate the impact of older volunteers’ available human, social, and cultural capital on their motivational forces to volunteer, measured through the Volunteer Function Inventory. A large European database of 955 older volunteers (i.e., aged 50+) was employed, and Seemingly Unrelated Regressions showed that older volunteers have different motivations according to different sets of individual resources. Furthermore, lower amounts of human and social capital (e.g., low educational level, poor health, being widowed, divorced or single) are associated with a higher propensity to volunteer to enhance one’s own self-esteem, to avoid thinking of personal problems, and for social reasons. These results have important implications for policy makers and voluntary organizations if they want to enhance volunteering among older people with less resources, i.e., that are more at risk of social exclusion. For example, according to the results of this study, policy makers could consider developing more tailored opportunities for involving older volunteers with low educational level, poor health, widowed, divorced, or single. They could do this by underlying that volunteering offers possibilities to satisfy motivational needs important to the, elderly, e.g., to increase self-esteem, to deal with personal problems in a better way, and to have satisfying social contacts. 相似文献
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When a publication is cited it generates a benefit. Through the country affiliations of the citing authors, it is possible to work upwards, tracing the countries that benefit from results produced in a national research system. In this work we take the knowledge flow from Italy as an example. We develop a methodology for examination of how the knowledge flows vary across fields, in each beneficiary country. We also measure the field comparative advantage of countries in benefiting from Italian research. The results from this method can inform bilateral research collaboration policies. 相似文献
56.
Giovanni Abramo 《Journal of Informetrics》2018,12(3):590-597
The development of scientometric indicators and methods for evaluative purposes, requires a multitude of assumptions, conventions, limitations, and caveats. Given this, we cannot permit ambiguities in the key concepts forming the basis of scientometric science itself, or research assessment exercises would rest on quicksand. This conceptual work attempts to spell out some principles leading to a clear definition of “impact” of research, and above all, of the appropriate scientometric indicator to measure it. The aim is to stimulate a discussion aimed at a definitive convergence on the meaning and measurement of a fundamental concept of the scientometric science. 相似文献
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This study evaluated students' affective learning in an introductory computing course that was taught in Hong Kong once in a lecture format and twice in a rich interactive multimedia online format to 414 college students in all. A simplified experience sampling method was used to assess affective learning at the midterm and end of each course in terms of intrinsic engagement (positive affect, perceived challenges, perceived skills in course activities), extrinsic engagement (performance expectations, performance goals, performance self‐efficacy), and negative affect in course activities. Controlling for students' computing background and pre‐enrollment academic ability, multivariate analysis of covariance indicated that, compared to lectures, e‐learning modules fostered more intrinsic engagement, comparable extrinsic engagement, and more negative affect. Findings suggest directions for developing online courses that optimise both cognitive learning and affective learning. 相似文献
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This study investigated the role of metacognition as a mediator of the effect of test anxiety on a surface approach to studying. The following scales were completed by 109 undergraduate social sciences students: Approaches and Study Skills Inventories for Students (ASSIST), Metacognitions Questionnaire (MCQ), and Test Anxiety Scale (TAS). Positive and significant correlations were observed between test anxiety and a surface approach to studying, and between all five dimensions of metacognition and test anxiety. Positive and significant correlations were also found between four of the five dimensions of metacognition and a surface approach to studying. Structural equation modelling was used to test a mediational model in which test anxiety predicted metacognition which in turn predicted a surface approach to studying. The results supported the hypothesis that the effect of test anxiety on a surface approach to studying is entirely mediated by metacognition. The practical implications of these findings are outlined. 相似文献
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This paper presents an investigation of management accounting in four major Italian universities, which have been struggling
to build their strategy in a context of significant change. Following many OECD countries the Italian government has been
changing its higher education system by giving more autonomy to universities. These changes pose a number of challenges for
management and accounting systems in Italian Universities. Drawing on self-referential theory and its applications to accounting
research the paper analyses the construction of Strategic Management Accounting (SMA) in four Italian universities, which
are immersed in a similar context of change. The focus is specifically on two aspects of decisions: (1) resource allocation
and (2) new academic programme.
相似文献
| Tommaso AgasistiEmail: |
60.
Nikki Giovanni 《About Campus》1996,1(2):25-26
When About Campus polled students and professors on what books they would recommend to help people understand other races and cultures, one book kept surfacing, Racism 101 by Nikki Giovanni. For that reason, and in honor of this issue, we decided to devote the entire “What They're Reading” column to a short chapter from Racism 101. 相似文献