30,528 research outputs found
On Real-oriented Johnson-Wilson cohomology
Answering a question of W. S. Wilson, I introduce a Z/2-equivariant
Atiyah-Real analogue of Johnson-Wilson cohomology theory BP, whose
coefficient ring is the =< n-chromatic part of Landweber's Real cobordism ring.Comment: Published by Algebraic and Geometric Topology at
http://www.maths.warwick.ac.uk/agt/AGTVol2/agt-2-38.abs.htm
Equilibrium Statistical Mechanics of Fermion Lattice Systems
We study equilibrium statistical mechanics of Fermion lattice systems which
require a different treatment compared with spin lattice systems due to the
non-commutativity of local algebras for disjoint regions.
Our major result is the equivalence of the KMS condition and the variational
principle with a minimal assumption for the dynamics and without any explicit
assumption on the potential. It holds also for spin lattice systems as well,
yielding a vast improvement over known results.
All formulations are in terms of a C*-dynamical systems for the Fermion (CAR)
algebra with all or a part of the following assumptions:
(I) The interaction is even with respect to the Fermion number.
(Automatically satisfied when (IV) below is assumed.)
(II) All strictly local elements of the algebra have the first time
derivative.
(III) The time derivatives in (II) determine the dynamics.
(IV) The interaction is lattice translation invariant.
A major technical tool is the conditional expectation from the total algebra
onto the local subalgebra for any finite subset of the lattice, which induces a
system of commuting squares. This technique overcomes the lack of tensor
product structures for Fermion systems and even simplifies many known arguments
for spin lattice systems.Comment: 103 pages, no figure. The Section 13 has become simpler and a problem
in 14.1 is settled thanks to a referee. The format has been revised according
to the suggestion of this and the other referee
A Clinical Investigation of the Mechanism of Loxoprofen, a Non-steroidal Anti-inflammatory Drug, for Patients with Nocturia
We previously reported the effectiveness of loxoprofen sodium (loxoprofen), a non-steroidal anti-inflammatory drug, for patients with lower urinary tract symptoms (LUTS) complaining of nocturia. In this study, we explored the mechanism of loxoprofen in the treatment of nocturia. Fifty-six patients complaining of nocturia were enrolled. They took a single 60-mg tablet of loxoprofen at bedtime for 14 days. The effects of this treatment were assessed by bladder diaries. Nocturia improved (nocturia decreased ≥1 void/night) in 40 patients (71.4%). Nocturnal urine volume was reduced in 31 of 40 (77.5%) without nocturnal single-void volume increase. Nocturnal single-void volume increased in 4 of 40 (10.0%) without nocturnal urine volume reduction. Two of 40 (5.0%) demonstrated both nocturnal urine volume reduction and nocturnal single-void volume increase. Three (7.5%) were exceptions to the above. In conclusion, the main mechanism of loxoprofen is the reduction of nocturnal urine volume for the treatment of nocturia and the second mechanism is the increased bladder capacity.</p
Anomalies of Discrete Symmetries and Gauge Coupling Unification
The anomaly of a discrete symmetry is defined as the Jacobian of the
path-integral measure. Assuming that the anomaly at low energies is cancelled
by the Green-Schwarz (GS) mechanism at a fundamental scale, we investigate
possible Kac-Moody levels for anomalous discrete family symmetries. As the
first example, we consider discrete abelian baryon number and lepton number
symmetries in the minimal supersymmetric standard model with the see-saw
mechanism, and we find that the ordinary unification of gauge couplings is
inconsistent with the GS conditions, indicating the possible existence of
further Higgs doublets. We consider various recently proposed supersymmetric
models with a non-abelian discrete family symmetry. In a supersymmetric example
with family symmetry, the GS conditions are such that the gauge
coupling unification appears close to the Planck scale.Comment: 22 pages, 4 figures, many typos corrected, references added,
published versio
Chiral symmetry restoration in monolayer graphene induced by Kekule distortion
We propose a chiral symmetry restoration mechanism in monolayer graphene, in
analogy with the strongly coupled gauge theory. The chiral (sublattice)
symmetry of graphene, which is spontaneously broken under the effectively
strong Coulomb interaction, is restored by introducing the Kekule-patterned
lattice distortion externally. Such a phase transition is investigated
analytically by the lattice gauge theory model with the original honeycomb
lattice structure. We discuss the relation between the chiral phase transition
and the spectral gap amplitude.Comment: 4 pages, 3 figures; published versio
Extracted Memory from Temporal Patterns Using Adaptive Resonance and Recurrent Network
We can recognize objects through receiving continuously huge temporal information including redundancy and noise, and can memorize them. This paper proposes a neural network model which extracts pre-recognized patterns from temporally sequential patterns which include redundancy, and memorizes the patterns temporarily. This model consists of an adaptive resonance system and a recurrent time-delay network. The extraction is executed by the matching mechanism of the adaptive resonance system, and the temporal information is processed and stored by the recurrent network. Simple simulations are examined to exemplify the property of extraction.Matsushita Electric Industrial Co., Ltd., Tokyo Information Systems Research Laboratory, Tokyo, Japa
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