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Irina Petroviciu Ina Vanden Berghe Ileana Cretu Florin Albu Andrei Medvedovici 《Journal of Cultural Heritage》2012,13(1):89-97
In this study, the dyes present in five 17th- to 18th-century textiles from the National Museum of Art of Romania, three religious embroideries and two brocaded velvets, are characterized and discussed, together with earlier results on textiles from Romanian collections obtained by the same research group. Dye analyses were performed using two methods: the well-established liquid chromatography-diode array detection (LC–DAD) and a recently developed liquid chromatography-mass spectrometry (LC–MS) analytical protocol. The examination of very small historical samples by both techniques allows a better insight in the advantages and limitations of the two approaches to real analyses to be obtained. LC–MS data interpretation is based entirely on the results accumulated for dye standards. Electrospray ionization (ESI) was used in the negative ion mode and an ion trap served as mass analyzer. Both single stage (MS) and tandem (MS/MS) mass spectrometric approaches were considered. The dyes and natural sources identified by both analytical techniques are discussed in the historical context of the textiles, with respect to earlier results collected for similar Romanian objects. The study showed that the dye sources found in the 17th- and 18th-century Romanian velvets and embroideries were produced using a wide variety of dye sources, suggesting influences from Europe as well as from Asia Minor. Dye sources imported from New World have been also detected. The range of biological sources is in very good correspondence with earlier results obtained from textiles in the Romanian Collections. LC-MS (single stage and tandem MS) approaches have been demonstrated to be valuable tools for dye identification in small-scaled samples from historical textile objects only if sufficient knowledge on the dyes and their biological sources is first accumulated within experiments performed on standard dyes and standard dyed fibers. 相似文献
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Janine Delahunty Irina Verenikina Pauline Jones 《Technology, Pedagogy and Education》2014,23(2):243-265
This review focuses on three interconnected socio-emotional aspects of online learning: interaction, sense of community and identity formation. In the intangible social space of the virtual classroom, students come together to learn through dialogic, often asynchronous, exchanges. This creates distinctive learning environments where learning goals, interpersonal relationships and emotions are no less important because of their ‘virtualness’, and for which traditional face-to-face pedagogies are not neatly transferrable. The literature reveals consistent connections between interaction and sense of community. Yet identity, which plausibly and naturally emerges from any social interaction, is much less explored in online learning. While it is widely acknowledged that interaction increases the potential for knowledge-building, the literature indicates that this will be enhanced when opportunities encouraging students’ emergent identities are embedded into the curriculum. To encourage informed teaching strategies this review seeks to raise awareness and stimulate further exploration into a currently under-researched facet of online learning. 相似文献
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Natalia Maloshonok Irina Shcheglova Svetlana Zhuchkova 《Higher Education Quarterly》2023,77(4):722-740
This study explored students' orientations towards student–university relationships and how they differ with regard to student characteristics and engagement. We developed an instrument measuring student orientations and utilised it in a survey of Russian undergraduates. Using latent class analysis, we identified the following types of Russian students' orientations: instructivists, consumerists, constructivists, and students with mixed orientations. As the results showed, the majority of our respondents have consumerist or mixed orientations that mostly mismatch with the actual models of student–university relationships at Russian universities. We also found that students with these orientations are less engaged than instructivists and constructivists. These findings demonstrate the importance of seeking an optimal match between diverse undergraduate orientations and the actual educational model, which fits national and institutional contexts. 相似文献
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Irina Rosa Kumschick Valentina Piwowar Diemut Ophardt Victoria Barth Katharina Krysmanski Felicitas Thiel 《Zeitschrift für Erziehungswissenschaft》2017,20(1):93-113
The following study aims to explore whether a video- and problem-based learning (PBL) environment can be improved using cognitive tools. Our hypothesis is that direct instructions in a PBL setting enhance pre-service teachers’ learning outcomes in classroom management. To answer this research question, we implemented a pre-post-design within which we assigned 237 master students to two learning environments: Classic problem-based learning (PBL), where students acquired central theoretical concepts and empirical findings on dealing with disruptions in groups (n = 113) or instructed problem-based learning (I-PBL), where students received extensive theoretical instructions (n = 124) during the first two seminar sessions. In the framework of a longitudinal self-report assessment we found that (1) teacher self-efficacy in the subscales “student engagement”, “instruction” and “classroom management competencies” increased in students of both groups. The highest increase was found in classroom management competencies. (2) In the evaluation with an objective measure students participating in the I?PBL group showed greater knowledge than students in the PBL group (multiple-choice test), and (3) regarding motivational processes students in the PBL group reported a higher degree of identification than students in the I?PBL group. 相似文献
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This paper discusses ballet dancers’ retirement, looking at the reasons for ending a performing career and their rehirement to an alternative role(s). The findings, explore different dimensions of the reasons for retirement. It attempts to investigate and nurture alternative thoughts on chronological age, in the context of ballet dancers’ retirement. Semi-structured interviews were conducted with 14 international ballet dancers. A qualitative approach was adopted through Interpretative Phenomenological Analysis (IPA), and tenets of Grounded Theory. Practical implications for career guidance practitioners are addressed in the final section. 相似文献
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ABSTRACTThe article analyses children’s views on aging in the context of social changes in Romania. Data from drawings and interviews conducted with 120 middle school children (75 girls and 45 boys) aged from 11 to 14 years, illustrate how views on aging and old people reflect cultural notions of aging and older individuals. Findings point out a mixture of positive views, imported from an international positive aging discourse and negative views that reflect the Romanian social reality of aging. Gender stereotypes also seem to impact how older people are perceived. Findings are critically discussed in relation to how social realities foster the maintenance and change of cultural views on aging and what kind of educational interventions should be developed. 相似文献
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Inquiry instruction often neglects graphing. It gives students few opportunities to develop the knowledge and skills necessary to take advantage of graphs, and which are called for by current science education standards. Yet, it is not well known how to support graphing skills, particularly within middle school science inquiry contexts. Using qualitative graphs is a promising, but underexplored approach. In contrast to quantitative graphs, which can lead students to focus too narrowly on the mechanics of plotting points, qualitative graphs can encourage students to relate graphical representations to their conceptual meaning. Guided by the Knowledge Integration framework, which recognizes and guides students in integrating their diverse ideas about science, we incorporated qualitative graphing activities into a seventh grade web-based inquiry unit about cell division and cancer treatment. In Study 1, we characterized the kinds of graphs students generated in terms of their integration of graphical and scientific knowledge. We also found that students (n = 30) using the unit made significant learning gains based on their pretest to post-test scores. In Study 2, we compared students' performance in two versions of the same unit: One that had students construct, and second that had them critique qualitative graphs. Results showed that both activities had distinct benefits, and improved students' (n = 117) integrated understanding of graphs and science. Specifically, critiquing graphs helped students improve their scientific explanations within the unit, while constructing graphs led students to link key science ideas within both their in-unit and post-unit explanations. We discuss the relative affordances and constraints of critique and construction activities, and observe students' common misunderstandings of graphs. In all, this study offers a critical exploration of how to design instruction that simultaneously supports students' science and graph understanding within complex inquiry contexts. 相似文献
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Irina Verenikina 《The Australian Educational Researcher》2012,39(4):477-489
This paper reports on a self-study undertaken by the author to better understand the educational practices of scaffolding in pre-service teachers?? collaborative group work. The method included student interviews, conversations with a critical friend, and the researcher??s diary. The self-study allowed for fine-tuning theoretical understanding and practical implementation of scaffolding in students?? small group work. While the study confirmed my expectations that facilitation of the students?? group work was useful for them to understand content and develop collaborative skills, the students?? emphasis on the emotional side of scaffolding was a surprising find. It was also interesting to note that the needs of emotional scaffolding in mature age students were different to those of high school graduates, which related to their self-confidence and their understanding of the role of the lecturer in assisting with their academic work. 相似文献
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Irina Engeness 《Technology, Pedagogy and Education》2018,27(3):297-311
The study provides an insight into how technology may affect teachers’ facilitating of the writing process which was examined and compared when Norwegian upper secondary school students wrote essays about English as a global language through multiple drafts with feedback received from the computer-based essay-critiquing system (EssayCritic) (target class) and from collaborating peers (comparison class). Quantitative and qualitative analyses of the teachers’ assistance drew on Galperin’s conceptualisation of learning. Findings reveal patterns in the teachers’ guidance in both conditions and outline the differences arising from the use of EssayCritic: by interacting with EssayCritic the teacher assisted the learners in completing the specific task, although little attention was paid to the development of their assessment for learning (AfL) skills. However, in the comparison class the teacher paid attention to the development of students’ AfL skills by emphasising the general approach to the analysis and the essential requirements of the essays. The study, therefore, raises questions about the need for practitioners’ awareness of whether the technology supports the development of, for example, AfL skills required in English writing classes. 相似文献