The children of the book: ideology and pedagogical practices of literacy teaching in the first grade of Israeli primary schools - an ethnographic study.

In this thesis it is argued that, beneath the surface modernity of\ud literacy education in Israel, lie age-old mechanisms that are being\ud used to instil into young readers an unquestioning adherence to\ud the voice of a single cultural text.\ud Children in the modern Israeli State are the latest heirs of an\ud ancient religio-cultural tradition. Throughout its 'longue duree',\ud the Jewish community has sought its identity and striven for\ud continued existence by dedication to ideals of literacy and to a\ud single Text. A review of the whole course of Jewish history which\ud focuses on the role of literacy reveals that this is the case.\ud Close inspection of the approach of the contemporary Israeli\ud State to the teaching of literacy in primary schools shows that\ud these ancient imperatives are still present and active, albeit in\ud transformed ways. The ideology of the Israeli State, embodied in\ud its 'Discourse of Nation-Building' shapes and moves the centralised\ud school-system and its pedagogy. The main themes of the\ud 'discourse' - solidarity, cohesion and defence - lie beneath the\ud apparently neutral surface of standard reading-scheme texts.\ud During the first hours of learning to read in school, the Israeli child\ud is also being invited to set out on the road to being a soldier.\ud An ethnographic study of what actually takes place when\ud literacy is being taught in Israeli first grades establishes that, for\ud the young Israeli, the first encounter with school literacy is a\ud moment in her personal and social life when she is initiated both\ud into the ancient Text and into the modern national/political\ud discourse. The whole process serves the requirements of\ud citizenship, rather than those of becoming a genuine reader

Experimental evidence of a metal-insulator transition in a half-filled Landau level

We have measured the low-temperature transport properties of a high-mobility front-gated GaAs/Al_{0.33}Ga_{0.67}As heterostructure. By changing the applied gate voltage, we can vary the amount of disorder within the system. At a Landau level filling factor $\nu =1/2$, where the system can be described by the composite fermion picture, we observe a crossover from metallic to insulating behaviour as the disorder is increased. Experimental results and theoretical prediction are compared.Comment: To be published in Solid State Communications. 4 figure

The Aharonov-Bohm Effect in the Fractional Quantum Hall Regime

We have investigated experimentally resonant tunnelling through single-particle states formed around an antidot by a magnetic field, in the fractional quantum Hall regime. For 1/3 filling factor around the antidot, Aharonov-Bohm oscillations are observed with the same magnetic field period as in the integer quantum Hall regime. All our measurements are consistent with quasiparticles of fractional charge e*. However, the results are also consistent with particles of any charge (>= e*) as the system must rearrange every time the flux enclosed increases by h/e.Comment: Postscript, 4 pages, gzipped (350 kB

Coulomb Charging Effects in an Open Quantum Dot

Low-temperature transport properties of a lateral quantum dot formed by overlaying finger gates in a clean one-dimensional channel are investigated. Continuous and periodic oscillations superimposed upon ballistic conductance steps are observed, when the conductance G of the dot changes within a wide range 0<G<6e^2/h. Calculations of the electrostatics confirm that the measured periodic conductance oscillations correspond to successive change of the total charge of the dot by $e$. By modelling the transport it is shown that the progression of the Coulomb oscillations into the region G>2e^2/h may be due to suppression of inter-1D-subband scattering. Fully transmitted subbands contribute to coherent background of conductance, while sequential tunneling via weakly transmitted subbands leads to Coulomb charging of the dot.Comment: 12 pages, RevTeX, 15 eps figures included, submitted to Phys. Rev.

Experimental Evidence for Coulomb Charging Effects in an Open Quantum Dot at Zero Magnetic Field

We have measured the low-temperature transport properties of an open quantum dot formed in a clean one-dimensional channel. For the first time, at zero magnetic field, continuous and periodic oscillations superimposed upon ballistic conductance steps are observed when the conductance through the dot $G$ exceeds $2e^2/h$. We ascribe the observed conductance oscillations to evidence for Coulomb charging effects in an open dot. This is supported by the evolution of the oscillating features for $G>2e^2/h$ as a function of both temperature and barrier transparency. Our results strongly suggest that at zero magnetic field, current theoretical and experimental understanding of Coulomb charging effects overlooks charging in the presence of fully transmitted 1D channels.Comment: To appear in Phys. Rev. Lett. 81 (Oct 19 issue

Energy-time entanglement of quasi-particles in solid-state devices

We present a proposal for the experimental observation of energy-time entanglement of quasi-particles in mesoscopic physics. This type of entanglement arises whenever correlated particles are produced at the same time and this time is uncertain in the sense of quantum uncertainty, as has been largely used in photonics. We discuss its feasibility for electron-hole pairs. In particular, we argue that the recently fabricated 2DEG-2DHG junctions, irradiated with a continuous laser, behave as "entanglers" for energy-time entanglement.Comment: 4 pages, 3 figure

The physics and fabrication of low-dimensional hole systems

SIGLEAvailable from British Library Document Supply Centre-DSC:D064223 / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Die Verbreitung der Moore in Österreich

Von Dr. Viktor Zaile