The diagonal conductivity usr was measured in the Corbino geometry in both integer and fractional quantum Hall effect (QHE). We find that peak values of g=.+ are approximately equal for transitions in a wide range of integer filling factors 3 < v < 16, as expected in scaling theories of QHE. This fact allows us to compare peak values in the integer and fractional regimes within the framework of...

The " exotic " particle model with non-commuting position coordinates , associated with the two-parameter central extension of the planar Galilei group, can be used to derive the ground states of the Fractional Quantum Hall Effect. The relation to other NC models is discussed. Anomalous coupling is presented. Similar equations arise for a semiclassical Bloch electron, used to explain the anoma-...

A simple one-dimensional model is proposed, in which N spinless repulsively interacting fermions occupy M>N degenerate states. It is argued that the energy spectrum and the wavefunctions of this system strongly resemble the spectrum and wavefunctions of 2D electrons in the lowest Landau level (the problem of the Fractional Quantum Hall Effect). In particular, Laughlin-type wavefunctions describ...

Division of Engineering and Applied Science, Harvard University, Cambridge, Massachusetts 02138, USA Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA Department of Physics and Astronomy, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA Bell Labs, ...

introduction: photonics refers to the technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. photonic technology in the meridian and acupoints research has shown the unique advantages, by which the microcosmic material basis and macroscopic phenomena research can be integrated to interpret the occurrence of propagated sensation along me...

conclusions the monitoring of antifungal susceptibilities of candida species isolated from clinical sources is highly recommended for the efficient management of patients. moreover, the trailing effect should be taken into consideration once the interpretation of the results is intended. results among the tested antifungal drugs in this study, the highest rate of resistance was observed against...

this work concerns the situations in which the framing effects emerge. this has not been an established feature in different studies, so the reasons for its variations have been the subject of various studies since 1980s. present study aimed to determine the variables affecting the feature as well as to address the controversies exist on how these variables affect it. 551 students from engineer...

the immunosuppressive effect of antimacrophage serum (ams) on the primary immune response of mice to sheep red blood cells (srbc) was studied. ams, given before a small dose of antigen, abrogated the immune response. transplantation of normal, galss-adherent macrophages enabled ams-treated animals to respond to srbc, while administration of lymph node lymphocytes did not reveres ams - induced i...

an investigation was made to study the residual activity and air- borne effect of pirimiphos- methyl, at 2g a.i./m2 in hut scale trials on different surfaces in kazeroun, and bandar-abbas, south of iran. in kazeroun area, bio-assay contact mortality test with pirimiphos methyl on mud, wood, cement and plaster surfaces, 54 days after hut spraying, decreased from 100% to 46.7%, 61.25%, 36.6% and ...