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排序方式： 共有268条查询结果，搜索用时 31 毫秒
171.
Annarosa Mangone Maria Cristina Caggiani Lorena Carla Giannossa Giacomo Eramo Viriana Redavid Rocco Laviano 《Journal of Cultural Heritage》2013,14(1):82-88
Late Apulian red figured pottery [1] from Egnatia (Fasano, Brindisi, Italy) was studied in order to widen the view on this ceramic class in Southern Italy. Inductively Coupled Plasma Mass Spectroscopy (ICP-MS) provided the samples elemental composition that allowed to make provenance hypotheses. Optical Microscopy (OM) and Scanning Electron Microscopy (SEM) with Energy Dispersive Spectrometry (EDS), supplied information about the minero-petrographic features of the objects to better understand their production technology. The set of results highlighted the contemporary presence in the Apulian land in the late 4th century BC of both local and imported finds and showed the existence of two different kinds of local production, the “classic” Attic and a peculiar one, characterized by the application of an engobe layer before the black gloss. Our previous studies resulted in the discovery that an engobe layer, with similar chemical and minero-petrographic characteristics, was present in finds from another site in central Apulia (Monte Sannace). So the discovery of red engobe on fragments from Egnatia, proves that its use was not an isolated occurrence, but was quite common in the production of red figured in Apulia during the Late period, appearing as a peculiar technological mark of Apulian potters. 相似文献
172.
Archives are an extremely valuable part of our cultural heritage since they represent the trace of the activities of a physical or juridical person in the course of their business. Despite their importance, the models and technologies that have been developed over the past two decades in the Digital Library (DL) field have not been specifically tailored to archives. This is especially true when it comes to formal and foundational frameworks, as the Streams, Structures, Spaces, Scenarios, Societies (5S) model is. 相似文献
173.
Marco Angelini Vanessa Fazzini Nicola Ferro Giuseppe Santucci Gianmaria Silvello 《Information processing & management》2018,54(6):1077-1100
Information Retrieval (IR) develops complex systems, constituted of several components, which aim at returning and optimally ranking the most relevant documents in response to user queries. In this context, experimental evaluation plays a central role, since it allows for measuring IR systems effectiveness, increasing the understanding of their functioning, and better directing the efforts for improving them. Current evaluation methodologies are limited by two major factors: (i) IR systems are evaluated as “black boxes”, since it is not possible to decompose the contributions of the different components, e.g., stop lists, stemmers, and IR models; (ii) given that it is not possible to predict the effectiveness of an IR system, both academia and industry need to explore huge numbers of systems, originated by large combinatorial compositions of their components, to understand how they perform and how these components interact together.We propose a Combinatorial visuaL Analytics system for Information Retrieval Evaluation (CLAIRE) which allows for exploring and making sense of the performances of a large amount of IR systems, in order to quickly and intuitively grasp which system configurations are preferred, what are the contributions of the different components and how these components interact together.The CLAIRE system is then validated against use cases based on several test collections using a wide set of systems, generated by a combinatorial composition of several off-the-shelf components, representing the most common denominator almost always present in English IR systems. In particular, we validate the findings enabled by CLAIRE with respect to consolidated deep statistical analyses and we show that the CLAIRE system allows the generation of new insights, which were not detectable with traditional approaches. 相似文献
174.
The aim of this study was to explore homophobic bullying in Portugal, including its forms, prevalence, and consequences, and to verify whether parental and social support moderated the effects of homophobic bullying for victims. An online questionnaire was completed by 211 female and male students, aged 12 to 20 years. Results showed that psychological violence prevailed, male students were more often victims than female students were, and lesbian, gay, and bisexual adolescents were victims more often than their heterosexual peers were. The emotional impact on victims was higher when social support was low, including suicidal ideation and school difficulties. Furthermore, a main effect of parental support was found for emotional and behavioral distress indices experienced by adolescents. 相似文献
175.
This paper reports the findings of a study of the impact of the transformative professional development (TPD) model on student achievement on state-mandated assessments of science in elementary school. Two schools (one intervention and one control) participated in the case study where teachers from one school received the TPD intervention across a 2-year period while teachers at the other school received no program and continued business as usual. The TPD program includes a focus on the core conceptual framework for effective professional development (Desimone in Educ Res 38:181–199, 2009) as well as an emphasis on culturally relevant pedagogy (CRP) and other effective science instructional strategies. Findings revealed that participation in TPD had a significant impact on student achievement for Burns Elementary with the percentage of proficient students growing from 25 % at baseline to 67 % at the end of the 2-year program, while the comparison school did not experience similar growth. Implications for future research and implementation of professional development programs to meet the needs of teachers in the realm of CRP in science are discussed. 相似文献
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177.
We propose a bridge between cognitive and sociocultural approaches that is anchored on the sociocultural side by distributed cognition and participation, and on the cognitive side by information structures. We interpret information structures as the contents of distributed knowing and interaction in activity systems. Conceptual understanding is considered as achievement of discourse in activity systems, and conceptual growth is change in discourse practice that supports more effective conceptual understanding. We also introduce a concept of perspectival understanding, in which accounts of cognition, including conceptual understanding, include points of view. This concept generalizes the concept of schema by hypothesizing that a perspectival understanding can be constructed by constraint satisfaction when a sufficient schema is not known or recognized. We provide an example in which perspectival understanding was jointly constructed, illustrating an interactional process we call “constructive listening.” 相似文献
178.
ABSTRACT Building on experiences from earlier digital initiatives and partnerships, the University of Virginia has developed new services and forged new collaborations between traditional information technology and library units in support of changing approaches to science and engineering research and education. Over the past 4 years, the library has evolved through numerous service models, changes in institutional vision, and budgetary shortfalls and has emerged with a new understanding of where to invest resources and energy for coming challenges. 相似文献
179.
180.