1,281 research outputs found
Correlation between projection of the ear, the inferior crus, and the antihelical body: Analysis based on computed tomography
This is a preprint of an article whose final and definitive form has been published in the SCANDINAVIAN JOURNAL OF PLASTIC AND RECONSTRUCTIVE SURGERY AND HAND SURGERY © 2007 copyright Taylor & Francis; SCANDINAVIAN JOURNAL OF PLASTIC AND RECONSTRUCTIVE SURGERY AND HAND SURGERY is available online at: http://www.informaworld.com/openurl?genre=article&PISSN=0284-4311&volume=41&issue=6&spage=288ArticleSCANDINAVIAN JOURNAL OF PLASTIC AND RECONSTRUCTIVE SURGERY AND HAND SURGERY. 41(6): 288-292 (2007)journal articl
K3 surfaces and log del Pezzo surfaces of index three
We use classification of non-symplectic automorphisms of K3 surfaces to
obtain a partial classification of log del Pezzo surfaces of index three. We
can classify those with "Multiple Smooth Divisor Property", whose definition we
will give. Our methods include the definition of right resolutions of quotient
singularities of index three and some analysis of automorphism-stable elliptic
fibrations on K3 surfaces. In particular we find several log del Pezzo surfaces
of Picard number one with non-toric singularities of index three.Comment: 32 pages, to appear in Manuscripta Mat
New Seiberg Dualities from N=2 Dualities
We propose a number of new Seiberg dualities of N=1 quiver gauge theories.
The new Seiberg dualities originate in new S-dualities of N=2 superconformal
field theories recently proposed by Gaiotto. N=2 S-dual theories deformed by
suitable mass terms flow to our N=1 Seiberg dual theories. We show that the
number of exactly marginal operators is universal for these Seiberg dual
theories and the 't Hooft anomaly matching holds for these theories. These
provide strong evidence for the new Seiberg dualities. Furthermore, we study in
detail the Klebanov-Witten type theory and its dual as a concrete example. We
show that chiral operators and their non-linear relations match between these
theories. These arguments also give non-trivial consistency checks for our
proposal.Comment: 31 pages, 7 figures. v2:version to appear in JHE
Gauge Mediation with D-term SUSY Breaking
We construct a gauge-mediation model with a D-term supersymmetry (SUSY)
breaking. R-symmetry breaking necessary for generating the SUSY standard-model
gaugino masses is given by gaugino condensation of a strongly coupled gauge
theory in the hidden sector. The energy scale of the strong dynamics of the
hidden sector gauge theory should be around the messenger mass scale M, or
otherwise perturbative calculations would be reliable and would lead to
negative soft mass squared for squarks and sleptons. Thus, all the mass scales
are controlled by a virtually single parameter, \sqrt{D}/M. This model covers a
very wide range of gravitino mass, m_{3/2} \simeq 1 eV--100 TeV. Possible
embeddings of the model in string theory are also discussed.Comment: 15 pages; v2: comments and references adde
Macdonald operators and homological invariants of the colored Hopf link
Using a power sum (boson) realization for the Macdonald operators, we
investigate the Gukov, Iqbal, Kozcaz and Vafa (GIKV) proposal for the
homological invariants of the colored Hopf link, which include
Khovanov-Rozansky homology as a special case. We prove the polynomiality of the
invariants obtained by GIKV's proposal for arbitrary representations. We derive
a closed formula of the invariants of the colored Hopf link for antisymmetric
representations. We argue that a little amendment of GIKV's proposal is
required to make all the coefficients of the polynomial non-negative integers.Comment: 31 pages. Published version with an additional appendi
Self-shielding effect of a single phase liquid xenon detector for direct dark matter search
Liquid xenon is a suitable material for a dark matter search. For future
large scale experiments, single phase detectors are attractive due to their
simple configuration and scalability. However, in order to reduce backgrounds,
they need to fully rely on liquid xenon's self-shielding property. A prototype
detector was developed at Kamioka Observatory to establish vertex and energy
reconstruction methods and to demonstrate the self-shielding power against
gamma rays from outside of the detector. Sufficient self-shielding power for
future experiments was obtained.Comment: 8 pages, 8 figure
V<sub>H</sub> replacement in rearranged immunoglobulin genes
Examples suggesting that all or part of the V<sub>H</sub> segment of a rearranged V<sub>H</sub>DJ<sub>H</sub> may be replaced by all or part of another V<sub>H</sub> have been appearing since the 1980s. Evidence has been presented of two rather different types of replacement. One of these has gained acceptance and has now been clearly demonstrated to occur. The other, proposed more recently, has not yet gained general acceptance because the same effect can be produced by polymerase chain reaction artefact. We review both types of replacement including a critical examination of evidence for the latter. The first type involves RAG proteins and recombination signal sequences (RSS) and occurs in immature B cells. The second was also thought to be brought about by RAG proteins and RSS. However, it has been reported in hypermutating cells which are not thought to express RAG proteins but in which activation-induced cytidine deaminase (AID) has recently been shown to initiate homologous recombination. Re-examination of the published sequences reveals AID target sites in V<sub>H</sub>-V<sub>H</sub> junction regions and examples that resemble gene conversion
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