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Zoe Eirini Papliaka Konstantinos S. Andrikopoulos Evangelia A. Varella 《Journal of Cultural Heritage》2010,11(4):381-391
This study examines the materials of a contemporary pictorial artwork, belonging to the Macedonian Museum of Contemporary Art in Thessaloniki (Greece), and needing conservation. The combined use of micro-FTIR and micro-Raman spectroscopy allowed the identification of almost all painting materials. Moreover, the stability of a series of synthetic pigments towards accelerated ageing is investigated in applications using the contemporary binding medium styrene-acrylic copolymer. The pigments in question are: Hansa yellow PY3 and PY74, quinacridone PV19 and PR122, naphthol AS PR112, phthalocyanine green PG7 and blue PB15, dioxazine PV37, van Dyck brown PBk11, ivory black PBk9, and titanium dioxide PW6. The organic pigments were applied alone or mixed with titanium dioxide, in rutile form or as a mixture of rutile/anatase. The experimental swatches were subjected to ageing tests, and subsequently studied as to colour changes by means of colorimetric measurements, and as to the molecular structure differentiations by infrared spectroscopy in reflectance mode. The ageing tests included exposure to high temperature and humidity (90 °C, 60% RH) and to ultraviolet radiation (350 nm, 30 °C and 50% RH, with a substantial temperature increase at 90 °C for 3 days). The greater colour difference is caused by high temperature and humidity, whereas paint layers containing TiO2, and especially the mixture of the forms rutile/anatase, prove very susceptible to ultraviolet radiation, demonstrating a significant colour difference and extended molecular changes. 相似文献
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In the present article an attempt is made to elucidate the organic colorants commonly encountered in the Russian avant-garde painting palette by a combined art historical, documentary and physicochemical investigation, and to examine the influence of environmental factors on the chromatic profile originally sought by the artist. The overall approach based on written sources is confirmed by measurements on relevant paintings. The documentary research deals with the influences of Orthodox iconography, folkloric art, and occidental modernist tendencies on the Russian avant-garde palette, and studies the effects of contradictory historical processes in the chromatic profile of individual paintings. In the experimental section a series of colorants are investigated concerning the effects of accelerated ageing on experimental painting tables, prepared as watercolor and gouache layers on paper ground. The resulting samples are subjected to colorimetric and spectroscopic measurements, and analogous analytical procedures are applied on samples taken from selected paintings. A systematic comparative study of all data permits evaluation of the materials used in terms of their stability towards extrinsic factors, and proposal of degradation routes in order to assist museum curators and conservators in every concrete case related to the broad spectrum of pigments examined. 相似文献
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This paper describes the education of repatriate children who are part of a complex process of repatriation and settlement to Greece. Special emphasis is given to the education of younger children in relation to career and survival issues facing families in transitional stages. It also discusses the impact of these special circumstances on parents' educational values. The repatriate group addressed here is the Pontian group, people of Greek origin who had settled and lived in the former USSR and who have been repatriating to Greece the last few years due to the recent political realignment in that area. The authors are members of a group of researchers, most of them faculty members of the Primary Education Department of Aristotle University of Thessaloniki, who have been engaged in programs and activities combating exclusion and poverty for over ten years. The data for this paper has been drawn from the work of this team. In our effort to explain and help readers understand the difficulties the Pontian children face in adjusting to the Greek educational system, it is necessary to describe the characteristics and modalities of the group which affect the educational attitudes they develop, as well as the socio/economic structure created by the host country to accommodate their needs. 相似文献
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Evangelia Krassadaki Kleanthi Lakiotaki Nikolaos F. Matsatsinis 《European Journal of Engineering Education》2014,39(3):233-246
Peer assessment (PA), as formative procedure, enhances learning by providing students with the opportunity to peer assess each other's work. However, since students exhibit different value systems (abilities, experiences, attitudes, cognitive styles, etc.) we propose a diagnostic procedure, which can be applied at the beginning of a course, in order to infer the most prevailing attitude among students. For this purpose, the proposed methodological framework, based on a multi-criteria clustering approach, identifies different assessment behaviours, in order to adopt the most common student assessment policy. To demonstrate the proposed method, an example is presented where two different PA data-sets are examined. The results clearly indicate that students exhibit different PA policies, nevertheless, a densely populated group is formed, the value system of which can be adopted thereafter. 相似文献
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Evangelia Koutidou 《International Journal of Lifelong Education》2014,33(3):309-325
This paper presents preliminary findings of an extensive socio-legal research project, currently in progress, concerning the implementation of the European Union and the Greek institutional framework on lifelong learning (LLL) and exploring the social effectiveness of LLL policy. The main outcomes, based on testing two research hypotheses through quantitative and qualitative content analysis, are presented. Firstly, there are significant differences in the ranking of four LLL objectives (employability/adaptability takes priority over social inclusion, personal fulfilment and active citizenship) as between legal documents of different origin (EU or national) and binding force (hard or soft law). Secondly, the key role of the global recession of 2008 in reinforcing the economic dimension of EU policy in the field is revealed. These data, considered from a socio-legal perspective, provide a basis for further discussion regarding national alignment to the EU’s LLL policy and argue for new ‘policy syntheses’ informed by the views of social actors concerned with policy implementation, in line with a broad humanistic notion of LLL. 相似文献
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In 2006 and 2008, two large trans-national residential summer schools on conservation science were organized as intensive programs. Learners were not only second/third cycle students in both exact sciences and humanities, but further practicing restorers; consequently their educational background, and even their way of approaching scientific problems, were very diversified, and evaluation of the feedback brought about an urgent need for leveling knowledge and skills. The 3rd summer school, scheduled for July 2009, is addressing the issue by offering self-paced preparatory material authored by the lecturers, and obeying patterns that satisfy the specific needs of both an e-learning environment and a homogenization procedure. Before being offered to the attendees, the pre-lecturing material underwent an interim evaluation concerning its conformity to the Bologna process concepts, as well as to generally accepted methodologies for electronically supported distance learning. Furthermore, teachers were asked on their attitudes towards the proposed scheme. Evaluation of the answers permits drawing conclusions on how far lecturers are capable of and/or willing to accept the abovementioned course structure, in order to fit with a framework designed according to the student-centred Bologna approach, and the fundamental e-learning practices. 相似文献
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Maria Giallousi Vassilios Gialamas Nicolas Spyrellis Evangelia A. Pavlatou 《International Journal of Science and Mathematics Education》2010,8(4):761-782
This study describes the development and validation of a Greek-language instrument that can be used to assess grade 10 students'
perceptions of their chemistry classroom environment as a means of showing differences between chemistry learning environments
in Greece (Attica) and Cyprus. The development of the instrument was based on available learning environment questionnaires.
The questionnaire was administered to 1,394 students from 49 chemistry classes in Attica, and the resulting data were analyzed
to explore the reliability and the validity of the new instrument. The validated questionnaire was administered to 225 students
from 15 classes in urban areas of Cyprus. The data analyses supported the questionnaire's internal consistency, discriminant
validity, and ability to differentiate between classrooms. Effect sizes and independent samples t test analyses revealed differences between the two samples. Cypriot students viewed their chemistry classroom environment
more favorably than did the Attica students. A possible cause for this difference could be the knowledge-centered aspect of
the grade 10 chemistry curriculum in Greece compared to the corresponding tool-instrumental knowledge curriculum in Cyprus. 相似文献
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This paper explores the Westernization of academic quality within the Papua New Guinea higher education system and the hybridity of the university sector where different actors force knowledge to be created for the needs of a small, formal economy, rather than for the development needs of the country. The country has yet to find a system that best responds to its educational needs; several models have been put into practice but without significant results. The approach that the PNG higher education institutes have taken, continuing the colonial tradition, builds on and is reinforced by the new international trends in higher education that follow the market needs, giving a false guarantee that HE is contributing to the economic growth of the country. Colonial legacies and neo‐colonial practices provide the conceptual framework. 相似文献
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The Leiden methodology (LM), also sometimes called the “crown indicator”, is a quantitative method for evaluating the research quality of a research group or academic department based on the citations received by the group in comparison to averages for the field. There have been a number of applications but these have mainly been in the hard sciences where the data on citations, provided by the ISI Web of Science (WoS), is more reliable. In the social sciences, including business and management, many journals and books are not included within WoS and so the LM has not been tested here. In this research study the LM has been applied on a dataset of over 3000 research publications from three UK business schools. The results show that the LM does indeed discriminate between the schools, and has a degree of concordance with other forms of evaluation, but that there are significant limitations and problems within this discipline. 相似文献