Alphabet grec | EPFL Graph Search

Lalphabet grec est un alphabet bicaméral de vingt-quatre lettres, principalement utilisé pour écrire la langue grecque depuis la fin du ou le début du C'est le premier et le plus ancien alphabet, dans l'acception la plus réduite de ce mot, car il note chaque voyelle et consonne avec un graphème séparé. Le grec moderne utilise encore cet alphabet de nos jours. Par le passé, les lettres ont servi également pour la numération grecque, depuis le , mais les chiffres arabes tendent à les remplacer en Grèce. D'abord uniquement écrit en capitales, l'alphabet grec s'est progressivement doté de minuscules et de diacritiques. L'alphabet grec descend du système d'écriture phénicien. Il n'a aucun lien avec le linéaire B ou le syllabaire chypriote, utilisés avant lui pour écrire ce qui était alors le grec. Cet alphabet en a engendré de nombreux autres en Europe et au Moyen-Orient, et notamment l'alphabet latin, via l'alphabet étrusque. En plus de servir à l'écriture du grec

Learning (Good Handwriting In Greek) By Teaching (A Humanoid Robot)

Thibault Lucien Christian Asselborn, Wafa Monia Benkaouar Johal, Thanasis Hadzilacos

We report on a follow-up study of the Co-Writer project at EPFL [1]; we confirm their findings, extend the applicability to another language with a different alphabet (Greek) and go into an in-depth qualitative study of the child-robot relationship. The core idea of "learning by teaching" is that the student learns by undertaking to teach what they are supposed to learn which motivates them into ownership of the process. Although a highly effective method [2], there are serious practical obstacles in scaling learning by teaching to larger numbers or extending it to younger learners and to certain skills such as handwriting. This is where we enlist the assistance of a humanoid robot to help a young learner with her handwriting by assuming the role of the cacographer pupil who asks help from its human friend. The robot pretends writing mistakes similar to the child's own; the child recognizes the errors as such even when she would refuse to acknowledge them in her own writing, and makes an extra effort for better writing as the robot's instructor; the robot improves its writing; the child goes through another round of amelioration; and, hopefully, gets in the habit of better writing. In order to extend the original study for the Greek language and alphabet we first needed to collect data from beginner writers, children of 6-9 years. The nine-month study for collecting and evaluating handwriting samples from primary school students in Cyprus in order to examine and describe cacography for the Greek alphabet used a questionnaire, an evaluation sheet for the letter formation and copies of students' notebooks. It involved four primary schools in Limassol, Cyprus and a total of 68 students and 11 teachers. We were thus able to obtain a consensus on what constitutes poor letter writing in Greek. All writing samples were evaluated by teachers and were classified based on Chandra et al. [3] taxonomy. The qualitative research involved three case studies of children who held two sessions each with the humanoid programmable robot NAO. We video recorded the child-robot interactions and assessed their progress in handwriting. In all three cases, albeit not in the same degree, we saw that (a) the child-robot interaction quickly improved; the increasing number of correct remarks from all children in only two meetings shows the comfort that they gained with lab environment and the robot itself and (b) the correctness of children remarks and their comments about letters shows their ability to distinguish the correct from the wrong letters and to justify their answers. Both conclusions confirm the findings of the Co-Writer project [4].

IATED-INT ASSOC TECHNOLOGY EDUCATION & DEVELOPMENT2020

Large Anomalous Nernst Angle in Co2MnGa Thin Film

Jean-Philippe Ansermet, Simon Granville, Junfeng Hu, Song Liu, Haiming Yu, Yan Zhang

The new trends for anomalous Nernst effect (ANE)-based thermoelectric devices require materials with large ANE values to realize the scalable generation of voltage. Recently, very large ANE values have been observed in single crystals of some novel magnetic materials. However, to allow work to proceed on developing ANE-based devices, these materials need to be produced in thin-film form, and to date, thin films have not achieved the same large ANE values as bulk materials. In this letter, we report a large ANE in a 50 nm thick film of ferromagnetic Heusler alloy Co2MnGa, matching the values achieved in the bulk material. By systematically mapping the thermoelectric transport properties, we extracted an anomalous Nernst angle in the range of 11.5% -14.2% at 300 K.

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2022

Learning (Good Handwriting In Greek) By Teaching (A Humanoid Robot)

Thibault Lucien Christian Asselborn, Wafa Monia Benkaouar Johal, Thanasis Hadzilacos

IATED-INT ASSOC TECHNOLOGY EDUCATION & DEVELOPMENT2020