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Ioannis Papadopoulos 《Science & Education》2008,17(1):115-129
Current research suggests that problem solving concerning complex and non-regular shapes can enhance the acquisition of the
concept of area. Despite the fact that this topic was always present in Greek mathematical textbooks it disappeared in the
modern ones. In this paper we deal with the way the specific topic has been presented for a long period (since 1749 until
1971). We describe the methods that known Greek scholars proposed for the calculation of the area of complex and non-regular
shapes and how the content of the relevant problems varies through these three centuries according to the social circumstances
that affected the philosophy of the educational system. 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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E-Government projects are currently service oriented, focusing on the implementation and diffusion of digital public services through one-stop points of access for citizens. E-Government strategic plans are political, directed at cost and time minimization during the execution of public services, and they do not take into account citizen needs or public administration operating procedures. Although these plans have led to the development of projects that have succeeded in cost and time savings for both citizens and public administration, surveys conducted around the world show that users evaluate digital public services and do not hesitate to return to traditional methods rather than using digital channels to transact with the public administration again; neither would they recommend the use of digital services to others. This article presents collaborative and participatory tools and methods designed to exploit the knowledge and experience of public servants in the improvement and execution of custom and non-automated public services. Collaborative tools can succeed in the development of real one-stop shops for e-Government, while on the other hand they can encourage both citizens and civil servants to participate in the e-Government era. 相似文献
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Sarit K. Das Seok Chung Ioannis Zervantonakis Joseph Atnafu Roger D. Kamm 《Biomicrofluidics》2008,2(3)
Studies on the effects of variations in temperature and mild temperature gradients on cells, gels, and scaffolds are important from the viewpoint of biological function. Small differences in temperature are known to elicit significant variations in cell behavior and individual protein reactivity. For the study of thermal effects and gradients in vitro, it is important to develop microfluidic platforms which are capable of controlling temperature gradients in an environment which mimics the range of physiological conditions. In the present paper, such a microfluidic thermal gradient system (μTGS) system is proposed which can create and maintain a thermal gradient throughout a cell-seeded gel matrix using the hot and cold water supply integrated in the system in the form of a countercurrent heat exchanger. It is found that a uniform temperature gradient can be created and maintained in the device even inside a high temperature and high humidity environment of an incubator. With the help of a hot and cold circuit controlled from outside the incubator the temperature gradient can be regulated. A numerical simulation of the device demonstrates the thermal feature of the chip. Cell viability and activity under a thermal gradient are examined by placing human breast cancer cells in the device. 相似文献
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Timothy C. Papadopoulos Athena Charalambous Androniki Kanari Maria Loizou 《European Journal of Psychology of Education - EJPE》2004,19(1):79-105
This study reports two different experiments, as a part of a longitudinal study, that evaluated a cognitive intervention (PREP:
PASS Reading Enhancement Program) to enhance early phonological processing skills, such as odd-word-out, segmenting, and blending,
to kindergarten children at-rish for reading difficulties, in order to support the development of subsequent word reading
skills. As part of the first experiment, thirty children aged 5.1, matched on the basis of age, gender, parental education
levels, Non-verbal and Verbal IQ, were assigned to an experimental and a control group (15 in each group) and compared before
and after the four-week intervention on a set of phonological and cognitive (successive and simultaneous processing) measures.
The two groups of participants were screened to be significantly different at pre-test on the outcome measures. The results
of the first experiment indicated that the experimental group performed equally well with the control group on all the measures
of phonological and cognitive processing skills. Subsequent analysis focusing on aptitude-treatment interaction indicated
that the PREP program appeared to be optimally successful in improving phonological skills in cases where the cognitive profile
of the 5-year-olds matched the emphasis on successive information integration. The follow-up experiment examined the long-term
effects of PREP remediation. Results showed that both the experimental and control groups performed equally well on word reading
tasks and, more importantly, on the bridging PREP tasks, requiring knowledge of the alphabet and of letter-sound correspondences,
despite that neither of the groups had been previously trained on the latter. Discussion concludes that intervention including
inductive training on the distal cognitive processes, namely successive and simultaneous processing, appears to be effective
for enhancing early word-reading skills to kindergarten children at-risk for reading difficulties, even in the absence of
direct training of these skills in kindergarten. 相似文献
29.
Ioannis M. Besieris 《Journal of The Franklin Institute》1973,296(4):249-258
A technique first suggested by Knop (1) has been used to invert exactly a special contour integral arising in the study of space-time evolution of pulsed plane electro- magnetic signals in the presence of a class of generalized conducting media. The final expressions are given in terms of Lommel functions of two imaginary variables. These findings have been applied to the examination of plane transient wave propagation in uniformly moving conducting media, and materials described by a dissipative Klein-Gordon equation. 相似文献
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Papadopoulos Timothy C. Spanoudis George Ktisti Christiana Fella Argyro 《European Journal of Psychology of Education - EJPE》2021,36(1):63-90
European Journal of Psychology of Education - We investigated the role of linguistic and cognitive processes in reading precocity from kindergarten to grade 2. A sample of 33 precocious readers was... 相似文献