Consolidating properties of Regalrez 1126 and Paraloid B72 applied to wood     

Gino Mirocle Crisci  Mauro Francesco La Russa  Marco Malagodi  Silvestro Antonio Ruffolo 《Journal of Cultural Heritage》2010,11(3):304-308

This study is aimed at an assessment of the properties of two polymeric products applied to Norway spruce (Picea abies) and White poplar (Populus alba) wood species. It contributes to ongoing research experiments on the consolidating properties of two synthetic resins and their potential synergic action on wood, resulting from their different interaction with the substrate: Paraloid B72 and Regalrez 1126. Experiments were carried out on a series of samples of the two wood varieties. The consolidants were applied alone and one after the other, with one coat of Regalrez and then one of Paraloid. Porosity and variations in pore size distribution were ascertained by mercury intrusion porosimetry (MIP). Colorimetric and IR spectroscopic measurements were also taken before and after aging by solar radiation and freeze/thaw cycles, to verify the possible slowing of photodegradation of the treated wood and the consolidating resistance. Results confirm that both products penetrate the wood with a different behaviour. After double treatment with Regalrez + Paraloid, a significant advantage was observed in terms of mechanical resistance and pore size distribution, although no advantages as regards resistance to photo-oxidizing processes or colour changes were observed.  相似文献   

Ammonium oxalate treatment: Evaluation by μ-Raman mapping of the penetration depth in different plasters     

Claudia Conti  Chiara Colombo  David Dellasega  Mauro Matteini  Marco Realini  Giuseppe Zerbi 《Journal of Cultural Heritage》2011,12(4):372

This study is focused on the evaluation by μRaman mapping of the penetration depth achieved by ammonium oxalate treatment in different plaster specimens, a hot issue in the conservation field. The role of the carbonatic aggregate particles and the influence of the different variables of the treatment on the penetration depth and on the distribution of the newly-formed phase (whewellite) have been ascertained. Based on the results of μRaman mapping, analyses with Field Emission Scanning Electron Microscopy have been carried out in order to observe the whewellite crystals and the carbonatic aggregate particles involved in the reaction with ammonium oxalate.  相似文献   

Youth,arts, and education: reassembling subjectivity through affect     

Nicola Sim 《Cultural Trends》2015,24(4):337-339

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More on evolution     

George Sim Johnston 《Academic Questions》1990,3(3):5-9

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Ansätze interdisziplinärer Forschung im Bereich der Sportwissenschaft     

H. de Marées 《Sportwissenschaft》1982,12(2):218-221

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Utilising the ‘3P-model’ to Characterise the Discipline of Didactics of Science     

Agustín?Adúriz-BravoEmail author  Mercè?Izquierdo-Aymerich 《Science & Education》2005,14(1):29-41

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Impact of interdisciplinary learning on the development of engineering students’ skills     

Alexandra R. Costa  Mafalda Ferreira  Ana Barata  Conceição Viterbo  José Salgado Rodrigues  José Magalhães 《European Journal of Engineering Education》2019,44(4):589-601

ABSTRACT

This paper intends to present an interdisciplinary project carried out in a School of Engineering, and to refer to its effects in the development of students’ skills. This project’s main goal was to present students with an intellectually demanding challenge which implied overcoming the disciplinary barriers thus integrating knowledge to solve the problems they were challenged with. After the project had been concluded, a study was carried out using a qualitative methodology by conducting two focus groups (n?=?16). The main goal of this procedure was to get a better perception of (1) how students understood the project; (2) what kind of skills students considered to have developed throughout the project, and (3) the importance they have attributed to this kind of project. The results demonstrate that students are aware of the relevance of the project not only for their education process but also for the development of their skills. The results of the study also reveal that the students involved in the project have been capable of identifying the specific skills that the project work had intended to address and develop.  相似文献   

Teacher's experiences in PBL: implications for practice     

Anabela C. Alves  Rui M. Sousa  Sandra Fernandes  Elisabete Cardoso  Maria Alice Carvalho  Jorge Figueiredo 《European Journal of Engineering Education》2016,41(2):123-141

Project-Based Learning (PBL) has been implemented in the first year of the Industrial Engineering and Management programme at the University of Minho, Portugal, since 2004/2005. The purpose of this paper is to analyse and discuss teachers' experiences in PBL in this programme and to explore its implications for student learning and for teaching practices in higher education. For data collection, the research method used was written narratives to these teachers, at the end of the PBL semester. Findings suggest that teachers express a positive view of PBL as a learning approach. They identify student motivation and engagement, along with a better understanding of the application of concepts in real-life situations, as important outcomes of the project for students. Besides this, teachers also highlight the importance of the development of transversal skills by students throughout the project. Recommendations for future work and implications for practice will also be discussed.  相似文献   

Nonorganic failure to thrive: an outpatient approach     

B D Schmitt  R D Mauro 《Child abuse & neglect》1989,13(2):235-248

This article reviews our experience, as well as the medical literature, regarding the treatment of failure to thrive (FTT) on an outpatient basis. Nonorganic FTT can be accidental, neglectful, or deliberate. Accidental FTT occurs with errors in formula preparation, diet selection, or feeding technique. These errors can usually be corrected by education and demonstration. Deliberate underfeeding is rare, and these children usually require placement in foster care. Neglectful FTT usually occurs because the mother is overwhelmed or psychologically disturbed. Children with neglectful FTT do not automatically require hospitalization. If the degree of FTT is mild to moderate, the mother-child interaction is positive, the mother is not severely disturbed, and the baby has no inflicted injuries or deprivational behavior, the baby can be safely and more economically managed as an outpatient. Management includes new feeding instructions, a stimulation program, social work intervention, home visits by a public health nurse, and weekly weight checks. Most infants respond to this one-month therapeutic trial with an appropriate weight gain. Even after normal weight is attained, many of these families require long-term follow-up to help them deal with multiple psychosocial issues.  相似文献   

Learning About the Nature of Science Using Newspaper Articles with Scientific Content     

Antonio?García-CarmonaEmail author  José?Antonio?Acevedo Díaz 《Science & Education》2016,25(5-6):523-546

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