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21.
ABSTRACT

This paper analyzes the process of crack saturation, which is fundamental to understanding why panel paintings have survived remarkably well in the uncontrolled environments of historic houses or places of worship for several centuries. The process of crack saturation was analyzed using finite element modeling. A double layer elastic model with fractured overlying paint layer was subjected to uniaxial tension. The critical separation between cracks was determined and compared with patterns observed in real paintings. In addition, the generation and propagation of delamination were studied to elucidate the effect of their propagation on the saturation distance of cracks, as well as the load carrying ability of the paint layer. Contributing modes of crack propagation and their significance are also discussed. The results demonstrate that shearing fracture mode dominates the process of delamination. The impact of crack saturation on the degree of relative humidity variation that is allowable is also discussed.  相似文献   
22.
The aim of the study was to conduct a comparative analysis of three forms of knowledge transfer online, taking into account the long-term knowledge growth rate and the satisfaction of students surveyed in respect to distance learning. The cohort of participants for this survey were students of the first degree, studying in the Emergency Medical Services. The authors created three e-learning courses in basic and advanced resuscitation procedures. The level of course participants’ satisfaction was analysed, as well as the knowledge growth rate measured three times: 7, 30 and 90 days, respectively, after finishing the course. The level of satisfaction in all the groups surveyed was comparable. The growth rate for knowledge was the highest in group C in the second and third survey, respectively (30 and 90 days after the end of the course), and a significant difference in favour of course C was demonstrated one month after finishing classes.  相似文献   
23.
The authors' purpose was to determine which form of therapeutic aid may influence academic approach and avoidance motivation in children with dyslexia. There were 165 children with dyslexia assessed with the use of ”I and my school” questionnaire. The authors considered the children's previous therapeutic experience and on its basis they were divided into three groups. Children receiving systematic therapeutic treatment display a significantly higher level of academic approach motivation as compared to those from the two other groups. Those children also manifest a lower level of academic avoidance motivation compared to those receiving no form of specialist treatment. Girls, regardless of their therapeutic experience, demonstrate a higher level of approach motivation; boys, on the other hand, display a higher level of avoidance motivation. The study shows that the quality of provided therapeutic aid affects emotional-motivational sphere of children with dyslexia. Systematic therapeutic aid increases academic approach motivation and reduces avoidance motivation.  相似文献   
24.

The aim of the article is to highlight the key elements related to the implementation of new technologies in education from the perspective of the opinions and experiences of educators in the field in Bolivia, Brazil, the Dominican Republic, Ecuador, Finland, Poland, Turkey, and Uruguay. The text compares issues related to attitudes towards the use of new media in education, experiences with different forms of e-learning, and the level of restrictions on the use of smartphones in school. These variables are juxtaposed with the self-assessment of digital competence and how cyberspace is used. The survey was conducted using a standardised survey questionnaire translated into the relevant national languages in the first half of 2019, and involved a sample of 873 teachers representing eight countries. On the basis of the pilot studies it was noted that: 1) Teachers from LAC and EU like to use digital media - this is a constant trend independent of geographical location; 2) Teachers note that new technologies are not always better than analogue didactic aids; 3) Teachers from selected countries (the Dominican Republic, Brazil, Turkey, and Uruguay) have much greater techno-optimism in themselves than teachers from Bolivia, Poland, Finland and Turkey in terms of the impact of ICT on student motivation and engagement; 4) In all countries teachers prefer free online courses (the different forms of e-learning are used most often by those in the Dominican Republic, and the least often in Bolivia and Poland); 5) In each country teachers who highly value their own digital competences and have a positive attitude towards new media use ICT much more actively; 6) There is also a global trend in that the extensive use of cyberspace (typical e-services) appears in combination with the extensive use of various forms of e-learning; 7) Teachers from Ecuador are most likely to want to ban the use of smartphones in schools. The most liberal approach in this respect is taken by the Uruguayans; 8) The knowledge of the conditions related to restricting the use of smartphones goes beyond the analyses related to the style of use and attitude towards new media. This article is the result of pilot studies conducted within the framework of the SMART ECOSYSTEM FOR LEARNING AND INCLUSION project carried out in selected Latin American, Caribbean (LAC) and European (EU) countries.

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25.
26.
ABSTRACT

This experimental program, implemented by the Managing Collection Environment Initiative at the Getty Conservation Institute, has provided data about the response of historic objects to changes in relative humidity (RH). Alongside other less sensitive documentation techniques (visual observation, physical measurements, photography, and 3D scanning), acoustic emission (AE) was monitored for six historic, museum-like wooden objects exposed to gradually increasing RH variations. Quantitative calibration of AE sensors and an anti-correlation measuring scheme to reduce environmental noise allowed the AE system to effectively trace micro-damage development caused by environmentally induced stress. Using an epidemiological approach, with respect to sample selection and experimental protocol, the obtained results can be used to explore the acceptable range of climate fluctuations for museum collections. The study’s well-controlled environmental protocol also allowed for the examination of the concept of ‘proofed fluctuation’ by the analysis of object response to reoccurring conditions.  相似文献   
27.
Abstract

Professor Eugeniusz Piasecki’s multiple contributions to the development of physical education as well as his activities in various educational, scientific, and social organizations place him among the elite physical education theorists in Poland and abroad. Until 1918, Piasecki was active in the cities of Kraków, Lvov, Kiev, and Zakopane, and in the years 1919–1939 and 1945–1947, he became firmly associated with the city of Poznań. Eugeniusz Piasecki was persistent in implementing his reformist ideas, especially in the field of training of physical culture professionals. Piasecki’s activities brought about significant advances in the theory and practice of physical education – called later physical culture sciences. Despite hardships and obstacles in his school and academic path, Eugeniusz Piasecki displayed a unique talent for propitiating medical and pedagogical professionals and for contributing to the development of the Scout Movement, school sports clubs, therapeutic gymnastics, university departments, and the League of Nations. The aim of the paper is to discuss and evaluate the original achievements of Eugeniusz Piasecki – a Polish scholar, physician, polymath, role model, and a co-founder of physical culture sciences, who made invaluable contributions to the training of PE teachers and instructors and the development of school and extra-school sport movement.  相似文献   
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