188 research outputs found
Failing boys and moral panics: perspectives on the underachievement debate
The paper re-examines the underachievement debate from the perspective of the ‘discourse of derision’ that surrounds much writing in this area. It considers the contradictions and inconsistencies which underpin much of the discourse – from a reinterpretation of examination scores, to the conflation of the concepts of ‘under’ and ‘low’ achievement and finally to the lack of consensus on a means of defining and measuring the term underachievement. In doing so, this paper suggests a more innovative approach for understanding, re-evaluating and perhaps rejecting the notion of underachievement
Quantum mechanics: Myths and facts
A common understanding of quantum mechanics (QM) among students and practical
users is often plagued by a number of "myths", that is, widely accepted claims
on which there is not really a general consensus among experts in foundations
of QM. These myths include wave-particle duality, time-energy uncertainty
relation, fundamental randomness, the absence of measurement-independent
reality, locality of QM, nonlocality of QM, the existence of well-defined
relativistic QM, the claims that quantum field theory (QFT) solves the problems
of relativistic QM or that QFT is a theory of particles, as well as myths on
black-hole entropy. The fact is that the existence of various theoretical and
interpretational ambiguities underlying these myths does not yet allow us to
accept them as proven facts. I review the main arguments and counterarguments
lying behind these myths and conclude that QM is still a
not-yet-completely-understood theory open to further fundamental research.Comment: 51 pages, pedagogic review, revised, new references, to appear in
Found. Phy
Production and Decay of D_1(2420)^0 and D_2^*(2460)^0
We have investigated and final states and
observed the two established charmed mesons, the with mass
MeV/c and width MeV/c and
the with mass MeV/c and width
MeV/c. Properties of these final states, including
their decay angular distributions and spin-parity assignments, have been
studied. We identify these two mesons as the doublet predicted
by HQET. We also obtain constraints on {\footnotesize } as a function of the cosine of the relative phase of the two
amplitudes in the decay.Comment: 15 pages in REVTEX format. hardcopies with figures can be obtained by
sending mail to: [email protected]
Measurement of the branching fraction for
We have studied the leptonic decay of the resonance into tau
pairs using the CLEO II detector. A clean sample of tau pair events is
identified via events containing two charged particles where exactly one of the
particles is an identified electron. We find . The result is consistent with
expectations from lepton universality.Comment: 9 pages, RevTeX, two Postscript figures available upon request, CLNS
94/1297, CLEO 94-20 (submitted to Physics Letters B
Measurement of the Decay Asymmetry Parameters in and
We have measured the weak decay asymmetry parameters (\aLC ) for two \LC\
decay modes. Our measurements are \aLC = -0.94^{+0.21+0.12}_{-0.06-0.06} for
the decay mode and \aLC = -0.45\pm 0.31 \pm
0.06 for the decay mode . By combining these
measurements with the previously measured decay rates, we have extracted the
parity-violating and parity-conserving amplitudes. These amplitudes are used to
test models of nonleptonic charmed baryon decay.Comment: 11 pages including the figures. Uses REVTEX and psfig macros. Figures
as uuencoded postscript. Also available as
http://w4.lns.cornell.edu/public/CLNS/1995/CLNS95-1319.p
Autism associated with tetrasomy 15: A further report
Association of autism with tetrasomy of chromosome 15 has recently been described in six males. In this report, we describe the occurrence of autism in a girl with tetrasomy of chromosome 15. The patient showed hyperactivity, hand-flapping, short-stature, eye abnormalities, and hypotonia, which have been reported in males with tetrasomy of chromosome 15. This suggests that autism may be associated in both sexes with a distinct syndrome characterized by tetrasomy of chromosome 15, mental retardation and characteristic physical features. L'association d'autisme avec une tétrasomie du chromosome 15 a été décrite récemment chez six garçons. Dans cet article, nous décrivons la survenue d'un autisme chez une fille avec une tétrasomie du chromosome 15. La patiente présentait une hyperactivité, un battement des mains, une petite taille, des anormalités des yeux et une hypotonie qui ont été rapportées chez des garçons avec tétrasomie du chromosome 15. Ceci suggère que l'autisme peut être associé dans les deux sexes avec un syndrome distinct caractérisé par une tétrasomie du chromosome 15, un retard mental et des traits physiques caractéristiques. Kürzlich wurde eine Assoziation einer Tetrasomie des Chromosoms 15 mit Autismus bei 6 männlichen Individuen beschrieben. In dem vorliegenden Fallbericht wird das Vorkommen eines Autismus bei einem Mädchen mit einer Tetrasomie des Chromosoms 15 dargestellt. Die Patientin zeigte Hyperaktivität, Handstereotypien, ophthalmologische Auffälligkeiten und Hypotonie. Diese Auffälligkeiten sind auch bei den männlichen Individuen mit einer Tetrasomie 15 beschrieben worden. Diese Befunde legen nahe, daß bei beiden Geschlechtern Autismus mit einem eigenständigen Syndrom im Falle des Vorliegens einer Tetrasomie 15 einhergeht, dessen wesentliche Merkmale geistige Behinderung und charakteristische Auffälligkeiten sind.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/41756/1/787_2005_Article_BF02098582.pd
Psychology and aggression
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/68264/2/10.1177_002200275900300301.pd
A measurement of B(D+S → φl+ν) B(D+S → φπ+)
Using the CLEO II detector at CESR, we have measured the ratio of branching fractions B (D + S → φl + ν) B (D + S → φπ + ) = 0.54 ± 0.05 ± 0.04 . We use this measurement to obtain a model dependent estimate of B (D + S → φπ + )
- …