2,027 research outputs found
Scalar resonance at 750 GeV as composite of heavy vector-like fermions
We study a model of scalars which includes both the SM Higgs and a scalar
singlet as composites of heavy vector-like fermions. The vector-like fermions
are bounded by the super-strong four-fermion interactions. The scalar singlet
decays to SM vector bosons through loop of heavy vector-like fermions. We show
that the surprisingly large production cross section of di-photon events at 750
GeV resonance and the odd decay properties can all be explained. This model
serves as a good model for both SM Higgs and a scalar resonance at 750 GeV.Comment: 12 pages, no figure, references updated, version for publicatio
Nonlinear transport theory for hybrid normal-superconducting devices
We report a theory for analyzing nonlinear DC transport properties of
mesoscopic or nanoscopic normal-superconducting (N-S) systems. Special
attention was paid such that our theory satisfies gauge invariance. At the
linear transport regime and the sub-gap region where the familiar scattering
matrix theory has been developed, we provide confirmation that our theory and
the scattering matrix theory are equivalent. At the nonlinear regime, however,
our theory allows the investigation of a number of important problems: for N-S
hybrid systems we have derived the general nonlinear current-voltage
characteristics in terms of the scattering Green's function, the second order
nonlinear conductance at the weakly nonlinear regime, and nonequilibrium charge
pile-up in the device which defines the electrochemical capacitance
coefficients
Sub-wavelength Coherent Imaging of a Pure-Phase Object with Thermal Light
We report, for the first time, the observation of sub-wavelength coherent
image of a pure phase object with thermal light,which represents an accurate
Fourier transform. We demonstrate that ghost-imaging scheme (GI) retrieves
amplitude transmittance knowledge of objects rather than the transmitted
intensities as the HBT-type imaging scheme does.Comment: 5 pages, 4 figures; Any comments pls. contact: [email protected]
Resistance imparted by vitamin C, vitamin e and vitamin B12 to the acute hepatic glycogen change in rats caused by noise.
The effects of vitamin C, vitamin E and vitamin B12 on the noise-induced acute change in hepatic glycogen content in rats were investigated. The exposure of rats to 95 dB and 110 dB of noise acutely reduced their hepatic glycogens. Vitamin C (ascorbic acid) and vitamin E (alpha -tocopherol) attenuated the noise-inducedacute reduction in the hepatic glycogen contents. This result suggests that antioxidants could reduce the change via reactive oxygen species. Vitamin B12 (cobalamin) delayed the noiseinduced change, a finding that suggests that vitamin B12 could postpone the acute change via compensating for vitamin B12 deficiency
The influence of cultural exchange on international trade: an empirical test of Confucius Institutes based on China and the ‘Belt and Road’ areas
With the implementation of the Belt and Road initiative, the
development of trade governance between China and countries
along the line has expanded. Firstly, this paper analyzes the
impact of cultural exchanges through Confucius Institutes on
regional trade cooperation from three dimensions: improving cultural identity, reducing trade costs and sharing information.
Secondly, we utilise data trade data from the 64 countries along
the line from 2004 to 2015 to examine the effects of Confucius
Institutes in regional trade cooperation with China. Overall, we
found that Confucius Institutes have significantly promoted the
trade growth of China and those countries. Compared to exports,
Confucius Institutes promote greater growth imports to the Belt
and Road countries from China. Compared to countries in the
Road, Confucius Institutes better promoted trade growth between
China and countries in the Belt. This empirical conclusion stands
under various robustness tests. Forth, after the 12th five-yearplan, the promoting effects of the Confucius Institute has been
strengthening. Fifth, the smaller the cultural distance, the stronger
the promoting effects of the Confucius Institute on the trade in
BRI countries. However, the effect of language similarity is not significant. This study indicates that the Chinese government should
pay more attention to the economic effects of cultural factors,
such as the Confucius Institute, in policy design
Bilinear effect in complex systems
The distribution of the lifetime of Chinese dynasties (as well as that of the
British Isles and Japan) in a linear Zipf plot is found to consist of two
straight lines intersecting at a transition point. This two-section
piecewise-linear distribution is different from the power law or the stretched
exponent distribution, and is called the Bilinear Effect for short. With
assumptions mimicking the organization of ancient Chinese regimes, a 3-layer
network model is constructed. Numerical results of this model show the bilinear
effect, providing a plausible explanation of the historical data. Bilinear
effect in two other social systems is presented, indicating that such a
piecewise-linear effect is widespread in social systems.Comment: 5 pages, 5 figure
catena-Poly[[{2-[(2-hydroxyethyl)iminomethyl]-6-methoxyphenolato}copper(II)]-μ-thiocyanato]
In the title thiocyanate-bridged polynuclear copper(II) complex, [Cu(C10H12NO3)(NCS)]n, the Cu atom is five-coordinated in a square-pyramidal geometry, with one phenolato O, one imino N and one hydroxy O atom of a Schiff base ligand and one thiocyanato N atom defining the basal plane, and with one thiocyanato S atom occupying the apical position. In the crystal structure, pairs of adjacent complex molecules are linked through intermolecular O—H⋯O hydrogen bonds into dimers. The dimers are further linked via Cu⋯S interactions, forming two-dimensional layers parallel to the bc plane
Non-intact zona improves development of murine preimplantation embryos transfected by an adenovirus vector
The present study explored whether embryos could be transfected by the adenovirus-vector if the zona pellucida (ZP) was not completely removed. An adenovirus vector with green fluorescent protein (pAd-GFP) was used to transfect mouse non-intact zona zygotes (following partial removal of the ZP induced by pronase), zona-free and zona-intact embryos. Non-intact zona and zona-free embryos expressed GFP (confirmed with inverted fluorescence microscopy) after 48 h of culture. The transfection rate of non-intact zona group was up to 51% and the entire zona-free group was transfected. However, none of the zona-intact embryos was transfected. Regardless of whether non-intact zona embryos were transfected by pAd-GFP, their developmental rate (74.3 ± 2.4 and 69.2 ± 3.3% for non-transfected and transfected, respectively; mean ± SEM) was higher (P<0.05) than that of zona-free embryos without and with transfection (54.5 ± 4.3 and 46.7 ± 5.5%). Developmental potential of embryos was decreased for ZP-digestion (non-intact zona 71.8 ± 1.6%; zona-free 50.6 ± 2.2%, P<0.05) or pAd-GFP expression (non-transfected 64.4 ± 1.9%; transfected 56.0 ± 2.1%, P<0.05); therefore, ZP-digestion affected more intensely embryos development than pAd-GFP expression. In summary, non-intact zona murine embryos were readily transfected by the adenovirus-vector, and had much greater development potential than zona-free embryos. Although, the susceptibility of the ZP to digestion by pronase varied among embryos, on average, approximately 3.5 to 4.0 min of digestion resulted in partial removal of the ZP and promoted both transfection and satisfactory embryonic development. It is expected that this method could be used to increase the efficiency of generating transgenic animals.Keywords: Mouse, non-intact zona embryos, adenovirus vector with green fluorescent protein (pAd-GFP), embryos developmen
Identification of Magnetic Interactions and High-field Quantum Spin Liquid in -RuCl
The frustrated magnet -RuCl constitutes a fascinating quantum
material platform that harbors the intriguing Kitaev physics. However, a
consensus on its intricate spin interactions and field-induced quantum phases
has not been reached yet. Here we exploit multiple state-of-the-art many-body
methods and determine the microscopic spin model that quantitatively explains
major observations in -RuCl, including the zigzag order,
double-peak specific heat, magnetic anisotropy, and the characteristic M-star
dynamical spin structure, etc. According to our model simulations, the in-plane
field drives the system into the polarized phase at about 7 T and a thermal
fractionalization occurs at finite temperature, reconciling observations in
different experiments. Under out-of-plane fields, the zigzag order is
suppressed at 35 T, above which, and below a polarization field of 100 T level,
there emerges a field-induced quantum spin liquid. The fractional entropy and
algebraic low-temperature specific heat unveil the nature of a gapless spin
liquid, which can be explored in high-field measurements on -RuCl.Comment: To appear in Nature Communications (12 pages, 6 figures, and 5
Supplementary Notes
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