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Page 1 MPTL16-Lijublijana, 2011-09-15Michelini, Santi, Stefanel MOSEM 2 in Italy Marisa Michelini, Lorenzo Santi, Alberto Stefanel Research Unit in Physics.

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Presentation on theme: "Page 1 MPTL16-Lijublijana, 2011-09-15Michelini, Santi, Stefanel MOSEM 2 in Italy Marisa Michelini, Lorenzo Santi, Alberto Stefanel Research Unit in Physics."— Presentation transcript:

1 Page 1 MPTL16-Lijublijana, 2011-09-15Michelini, Santi, Stefanel MOSEM 2 in Italy Marisa Michelini, Lorenzo Santi, Alberto Stefanel Research Unit in Physics Education University of Udine

2 Page 2 MPTL16-Lijublijana, 2011-09-15Michelini, Santi, Stefanel Teacher Seminars in Italy

3 Page 3 Teacher Seminars in Italy 20 schools in 15 different Italian cities (around Udine. Bolzano, Treviso, Cosenza, Crotone) 71 teachers (30 women, 41 men). Udine 5 sessions Feb-May10 & 2 sec. Dec10- Jan11) Cosenza 3+2 sess. Dec 09-Jan10 & 1 sec May11 Crotone 3 sess. May11 Treviso 3 sess. Feb-Mar10 Bolzano 3 sess. Feb-Mar10. Each session: 3-4 hours. MPTL16-Lijublijana, 2011-09-15Michelini, Santi, Stefanel

4 Page 4 MPTL16-Lijublijana, 2011-09-15Michelini, Santi, Stefanel Mod ule ActivityTopic 1Part A. Introduction Part B. Esperiencial Didactic Laboratory (EDL) Projects Supercomet family & MOSEM-MOSEM 2 : Proposals and teaching materials. Overview of project online materials, and experimental multimedia. Qualitative exploration of the electrical conductivity, magnetic phenomena and the phenomena of em induction, with the materials of the project MOSEM 2 Low Tech kit. Overview of the experiments. 2EDLQualitative exploration of the phenomena of superconductivity with HTK MOSEM 2. Pinning and the Meissner effect, magnetic levitation train (MAGLEV). 3EDLAnalysis with on-line sensors of electromagnetic induction phenomena and modeling 4EDLHall coefficient and R vs T measurements for metals, semiconductors and superconductors 5 DesignDesign of classroom activities and experiments. Presentation of educational paths produced by teachers in Supercomet 2 project and proposals developed in the projects MOSEM2. Designing interventions, preparing materials & experiments

5 Page 5 Teacher Seminars in Italy CK & PCK questionnaire MPTL16-Lijublijana, 2011-09-15Michelini, Santi, Stefanel

6 Page 6 Teacher Seminars in Italy CK & PCK questionnaire MPTL16-Lijublijana, 2011-09-15Michelini, Santi, Stefanel

7 Page 7 Teacher Seminars in Italy CK & PCK questionnaire MPTL16-Lijublijana, 2011-09-15Michelini, Santi, Stefanel

8 Page 8 Teacher Seminars in Italy From experiment to model MPTL16-Lijublijana, 2011-09-15Michelini, Santi, Stefanel 1) Aim: observing a phemonena design an experiment, compare results and model Phenomenon (i.e a magnet falling inside a coil) -Define aspects to be described (after identific. Important process) -Theorethical reference law -Variables to be measured

9 Page 9 Teacher Seminars in Italy From experiment to model MPTL16-Lijublijana, 2011-09-15Michelini, Santi, Stefanel Aim: build a physical model for the phenomenon (i.e a magnet falling inside a cupper tube) Starting from experimental results: -Define aspects to be modeled (after identific. Important process) -Theorethical reference law -Variables to be included in the module -Correlation between variables and map -Implementation of the model (pen and paper; sw-environment -Educational hint

10 Page 10 MOSEM-MOSEM2 material Exhibits AFrascati (LN-INFN) Communica ting Physics at NLINFN 12-16 April 2010 30 stedents 40 teachers 150 researchers LS Frascati and Roma; ITI Roma. Physics Researcher, Physics Education researchers, teachers from all Italy. BUdine Univ. Udine INT. ESERA Summer School for PhD students of all Europe 25-31 July 2010 22 science education researchers 50 PhD students All of Europe CUdine Town hall – Loggia del lionello ENERGIA IN GIOCO, Saturday 23ott2010 50 othersUdine surrounding MPTL16-Lijublijana, 2011-09-15Michelini, Santi, Stefanel

11 Page 11 Experimentation with students in Italy MPTL16-Lijublijana, 2011-09-15Michelini, Santi, Stefanel LocEvent manifestation Date (h) N. T/SSchool Type (*)-Loc 1UdineSalone dello studente 10 Febb1020/250 +10 par LS Udine; LS Cervignano; ITI Udine; IPSIA S Daniele 2Martignacco (UD) Young 2010March1015/270 +50 others LS Codroipo, Tolmezzo, Monfalcone, Udine; Cervignano; ITI Udine, Pordenone, Tolmezzo; IPSIA Udine; Gemona 3UdineSpring 2010 Sci Weeks March105/90LS Udine; LS Cervignano; ITI Udine 4SienaPigelleto Summer Sch. 9-10 Sep108/40LS ArSezzo; LS Siena; 5Pordenone70 yers of the LS Grigoletti 16 0ct107/125LS Grigoletti, Pordenone UdineScientific Weeks 2011. Feb114/92LS Marinelli, Udine LS Quadri, Vicenza 6CosenzaPLS project.May116/40Schools from Cosenza and surrounding 7CrotoneFinal Exami Project. May114/12LS – Filolao, Crotone 8UdineNational summer sch Mod Phy 2011 25-30 July117/45Students coming from schools of different italian cities 9SienaPigelleto summer school 2011 5-10 Sept119/40LS Arezzo; LS Siena;

12 Page 12 Experimentation in: Pigelleto Summer School 5h (large group activity and little group reflection)+1h (resumen/presentation) –1) magn intercation; B fiel line (superposiion); magnetic suspenction –2) levitation of a magnet on a SC –3) em induction processes –4) Phenomenological models for Meissner effect –5) pinning, pinning vs Meissner and MAGLEV MPTL16-Lijublijana, 2011-09-15Michelini, Santi, Stefanel

13 Page 13 Worksheets for students MPTL16-Lijublijana, 2011-09-15Michelini, Santi, Stefanel

14 Page 14 The students models Students Group 1 – EM Induction: a magnet fall inside a copper tube –1.1) free fall t1 vs fall inside the tube t2 –1.2) answer: why change time? From which parameters is depending? –1.3) Ein= Pot.En –1.4) Einterm= Kin En = cost! (unif. Motion) – 1.5) Epot pass to the copper via em induction process (producing constant field) MPTL16-Lijublijana, 2011-09-15Michelini, Santi, Stefanel

15 Page 15 The students models Students Group 1 – EM Induction: a magnet fall inside a copper tube –1.6) Extrem case: the magnet will be stopped –1.7) Many factors: conductivity, magnet parameters (shape, strenght), temperature) –1.8) Assuming extreme conditions: if magnet stop Enp=0 no energy transfer to the tube; the copper tube disperse the generated electric current the magnet re- start to fall-down". –1.9) T affect the state of the mulecules and conductiviti decrease when T decreaese. MPTL16-Lijublijana, 2011-09-15Michelini, Santi, Stefanel

16 Page 16 The students models Students Group 2 – Pinning. –2.1) At T=Tamb we put on an YBCO sample a magnet. The field lines are not affected –2.2) The LN cools YBCO..flux of electrons in the YBCO that generate a B flusso –2.3) At T { "@context": "http://schema.org", "@type": "ImageObject", "contentUrl": "http://images.slideplayer.com/1/542097/slides/slide_16.jpg", "name": "Page 16 The students models Students Group 2 – Pinning.", "description": "–2.1) At T=Tamb we put on an YBCO sample a magnet. The field lines are not affected –2.2) The LN cools YBCO..flux of electrons in the YBCO that generate a B flusso –2.3) At T

17 Page 17 The students models Students Group 2 – Pinning. –2.5) Differences pinning and Meissner: Different YBCO (different properities). The SC do not contrast the B. It has the capability to memorize the distance [between magnet and SC] There is an «interaction between magnetic fields» MPTL16-Lijublijana, 2011-09-15Michelini, Santi, Stefanel

18 Page 18 The students models Students Group 3 – Meissner. 3.1) «From observation: teacking YBCO under Tc the field produced by it is opposite to the magnetic field. 3.2) With few tests the magnet stand at equilibrium over the SC. 3.3) We observe with different magnets. MPTL16-Lijublijana, 2011-09-15Michelini, Santi, Stefanel

19 Page 19 The students models Students Group 3 – Meissner. 3.4)The magnet rotates only around his axes 3.5) If we turn the [SC] disk, the disk do not create the counter-magnetism, and the magnet do not remains at equilibrium. MPTL16-Lijublijana, 2011-09-15Michelini, Santi, Stefanel

20 Page 20 The students models Students Group 4 – MAGLEV train. 4.1) The levitation of the MAGLEV Train is based on pinning-effect 4.2) Craeting SC interposing a separator between magnet and Sc 4.3) «At T=Tamb nothing happens». 4.4) «after fulling the train of LN the disc has brought to SC. With separator memory of distance. It flows over the track. Friction just by air". MPTL16-Lijublijana, 2011-09-15Michelini, Santi, Stefanel

21 Page 21 The students models Students Group 4 – MAGLEV train. 4.5) «The train have memory that he must come back» 4.6) «If the preparation procedure is realized apart: levitation due to Meissner effect; it has problem to come back as the magnet» 4.7) SC in the everyday life: trains in Giapan and Germany. MPTL16-Lijublijana, 2011-09-15Michelini, Santi, Stefanel

22 Page 22 The students models Students Group 4 – MAGLEV train. 4.8) Role of the track: Track sud-nord- sud on the transversal direction. Track with the same polariti on the left-right direction («recognized exploring directly with a magnet») MPTL16-Lijublijana, 2011-09-15Michelini, Santi, Stefanel

23 Page 23 MPTL16-Lijublijana, 2011-09-15Michelini, Santi, Stefanel


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