6,591 research outputs found
Microscopic observation of superconducting fluctuations in -(BEDT-TTF)Cu[N(CN)]Br by C NMR spectroscopy
We performed C-NMR experiment and measured spin-lattice relaxation
rate divided by temperature near the superconducting (SC) transition
temperature in -(BEDT-TTF)Cu[N(CN)]Br (-Br
salt), and -(BEDT-TTF)Cu(NCS) (-NCS salt). We
observed the reduction of starting at the temperature higher than
in -Br salt. Microscopic observation of quasi-particle density of
states in the fluctuating SC state revealed the effects of short-range Cooper
pairs induced in the normal state to the quasi-particle density of states. We
also performed systematic measurements in the fields both parallel and
perpendicular to the conduction plane in -Br and -NCS salts,
and confirmed that the reduction of above is observed only
in -Br salt regardless of the external field orientation.Comment: Accepted for publication in PR
The bosonic string and superstring models in 26+2 and 10+2 dimensional space--time, and the generalized Chern-Simons action
We have covariantized the Lagrangians of the U(1)_V * U(1)_A models, which
have U(1)_V * U(1)_A gauge symmetry in two dimensions, and studied their
symmetric structures. The special property of the U(1)_V * U(1)_A models is the
fact that all these models have an extra time coordinate in the target
space-time. The U(1)_V * U(1)_A models coupled to two-dimensional gravity are
string models in 26+2 dimensional target space-time for bosonic string and in
10+2 dimensional target space-time for superstring. Both string models have two
time coordinates. In order to construct the covariant Lagrangians of the U(1)_V
* U(1)_A models the generalized Chern-Simons term plays an important role. The
supersymmetric generalized Chern-Simons action is also proposed. The
Green-Schwarz type of U(1)_V * U(1)_A superstring model has another fermionic
local symmetry as well as \kappa-symmetry. The supersymmetry of target
space-time is different from the standard one.Comment: 27 pages, no figure
EFFECTS OF DRYING AND ENSILING METHODS ON CYANIDES CONTENTS AND CHEMICAL COMPONENTS OF CASSAVA ROOTS AND STEMS
The objectives of this experiment was to compare the drying and ensiling methods to reduce cyanides
contents in cassava, as well as related nutrient components. This experiment used roots and stems of cas-sava,
fermented juice of epiphytic lactic acid bacteria (FJLB) and molasses. A completely randomized design
was used in this experiment for 8 treatments. The treatments were 30 o C incubator, 50 o C incubator, 70 o C
oven drying, freeze drying, 2 d incubator 30 o C ensiling, 2 d incubator 50 o C ensiling, 2 w incubator 30 o C
ensiling and 2 w incubator 50 o C ensiling. The contents of HCN, acetone cyanohydrin, linamarin, proximate
components and in vitro dry matter digestibility were determined in each treatment. The result of this experi-ment
showed that the contents of HCN and linamarin in ensiled cassava roots were lower (p<0.01) than in
dried cassava roots. There were no significantly different on residual HCN among treatments in cassava
stems. The content of linamarin was higher in freeze drying than that in heat drying methods (p<0.05).
There was an opposite pattern of acetone cyanohydrins and linamarin content of roots and stems. The
content of dry matter (DM) in 30 o C ensiling was lower than in 50 o C ensiling (p<0.05). The content of ash
increased in cassava roots silage (p<0.01), meanwhile the decreasing of ether extract content was occured
in cassava stem silage (p<0.01). Ensiling method was more effective to reduce cyanide than the drying
method, and cassava silage showed a proper qualification as feed.
Keywords: Drying, Ensiling, Cyanides, Cassav
Recursive sampling simulations of 3D gravity coupled to scalar fermions
We study numerically the phase structure of a model of 3D gravity interacting
with scalar fermions. We measure the 3D counterpart of the "string"
susceptibility exponent as a function of the inverse Newton coupling .
We show that there are two phases separated by a critical point around
. The numerical results support the hypothesis that the
phase structures of 3D and 2D simplicial gravity are qualitatively similar, the
inverse Newton coupling in 3D playing the role of the central charge of matter
in 2D.Comment: Latex with 6 figure files, 17 page
Generalized Gauge Theories and Weinberg-Salam Model with Dirac-K\"ahler Fermions
We extend previously proposed generalized gauge theory formulation of
Chern-Simons type and topological Yang-Mills type actions into Yang-Mills type
actions. We formulate gauge fields and Dirac-K\"ahler matter fermions by all
degrees of differential forms. The simplest version of the model which includes
only zero and one form gauge fields accommodated with the graded Lie algebra of
supergroup leads Weinberg-Salam model. Thus the Weinberg-Salam model
formulated by noncommutative geometry is a particular example of the present
formulation.Comment: 33 pages, LaTe
Structure of air shower disc near the core
The longitudinal structure of the air shower disk is studied by measuring the arrival time distributions of air shower particles for showers with electron size in the range 3.2 x 10 to the 5.5. power to 3.2 x 10 to the 7.5 power in the Akeno air-shower array (930 gcm squared atmospheric depth). The average FWHM as a parameter of thickness of air shower disk increases with core distances at less than 50m. AT the present stage, dependence on electron size, zenith angle and air shower age is not apparent. The average thickness of the air shower disk within a core distance of 50m could be determined by an electromagnetic cascade starting from the lower altitude
Search for long-lived massive particles in extensive air showers
Air showers containing delayed sub-showers which may be produced by a long-lived massive particle have been investigated by using twelve detectors. Ten events have been selected out as the candidates. However, a definite conclusion cannot be reached at the present time
Transfer Matrix Formalism for Two-Dimensional Quantum Gravity and Fractal Structures of Space-time
We develop a transfer matrix formalism for two-dimensional pure gravity. By
taking the continuum limit, we obtain a "Hamiltonian formalism'' in which the
geodesic distance plays the role of time. Applying this formalism, we obtain a
universal function which describes the fractal structures of two dimensional
quantum gravity in the continuum limit.Comment: 13 pages, 5 figures, phyzz
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