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1. chinaXiv:202010.00076 [pdf]

Multisensory Signals Inhibit Pupillary Light Reflex: Evidence from Pupil Oscillation

Xiangyong Yuan; Yuhui Cheng; Yi Jiang
Subjects: Psychology >> Cognitive Psychology

Multisensory integration, which enhances the stimulus saliency at the early stage of processing hierarchy, is recently shown to produce a larger pupil size than its unisensory constituents. Theoretically, any modulation on pupil size ought to be associated with the sympathetic and parasympathetic pathways that are sensitive to lights. But it remains poorly understood how pupillary light reflex is changed in a multisensory context. The present study evoked an oscillation of pupillary light reflex by periodically changing the luminance of a visual stimulus at 1.25 Hz. It was found that such induced pupil oscillation was substantially attenuated when the bright but not the dark phase of the visual flicker was periodically and synchronously presented with a burst of tones. This inhibition effect persisted when the visual flicker was task-irrelevant and out of attentional focus, but disappeared when the visual flicker was moved from the central field to the periphery. These findings not only offer a comprehensive characterization of the multisensory impact on pupil response to lightness, but also provide valuable clues to the individual contributions of the sympathetic and parasympathetic pathways to multisensory modulation of pupil size.

submitted time 2021-04-27 Hits9027Downloads918 Comment 0

2. chinaXiv:201709.00059 [pdf]

A Phenomenological Study on Lepton Mass Matrix Textures

Chun Liu; Jeonghyeon Song
Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

The three active light neutrinos are used to explain the neutrino oscillations.The inherently bi-large mixing neutrino mass matrix and the Fritzsch type,bi-small mixing charged lepton mass matrix are assumed. By requiring the maximal #23;μ ?#23;#28; mixing for the atmospheric neutrino problem and the mass-squared difference approperiate for the almost maximal mixing solution to the solar neutrino problem, the following quantities are predicted: the #23;e?#23;μ mixing, Ve3, CP violation in neutrino oscillations, and the effective electron-neutrino mass relevant to neutrinoless double beta decays.

submitted time 2017-09-17 Hits1284Downloads767 Comment 0

3. chinaXiv:201709.00060 [pdf]

Confronting Heavy Tau Neutrinos with Neutrino Oscillations

Chun Liu
Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

If the tau neutrino is as heavy as 10 MeV which may have certain astrophysical implications, the neutrino mass pattern is studied so as to accommodate the new oscillation observations. It predicts that the electron neutrino has Marjorana mass around 0.05 eV. A supersymmetric model is described to realize the above scenario.

submitted time 2017-09-17 Hits891Downloads544 Comment 0

4. chinaXiv:201706.00727 [pdf]

Supersonic Cavity Flows over Concave and Convex Walls

A Ran Ye; Rajarshi Das; Toshiaki Setoguchi; Heuy Dong Kim
Subjects: Dynamic and Electric Engineering >> Engineering Thermophysics

To promote the utilization efficiency of coal resources, and to assist with the control of sulphur during gasification and/or downstream processes, it is essential to gain basic knowledge of sulphur transformation associated with gasification performance. In this research we investigated the influence of O-2/C molar ratio both on gasification performance and sulphur transformation of a low rank coal, and the sulphur transformation mechanism was also discussed. Experiments were performed in a circulating fluidized bed gasifier with O-2/C molar ratio ranging from 0.39 to 0.78 mol/mol. The results showed that increasing the O-2/C molar ratio from 0.39 to 0.78 mol/mol can increase carbon conversion from 57.65% to 91.92%, and increase sulphur release ratio from 29.66% to 63.11%. The increase of O-2/C molar ratio favors the formation of H2S, and also favors the retained sulphur transforming to more stable forms. Due to the reducing conditions of coal gasification, H2S is the main form of the released sulphur, which could be formed by decomposition of pyrite and by secondary reactions. Bottom char shows lower sulphur content than fly ash, and mainly exist as sulphates. X-ray photoelectron spectroscopy (XPS) measurements also show that the intensity of pyrite declines and the intensity of sulphates increases for fly ash and bottom char, and the change is more obvious for bottom char. During CFB gasification process, bigger char particles circulate in the system and have longer residence time for further reaction, which favors the release of sulphur species and can enhance the retained sulphur transforming to more stable forms.

submitted time 2017-06-22 From cooperative journals:《热科学学报》 Hits1211Downloads709 Comment 0

5. chinaXiv:201703.00658 [pdf]

Noise-enhanced chaos in a weakly coupled GaAs/(Al,Ga)As superlattice

Zhizhen Yin; Helun Song; Yaohui Zhang; Miguel Ruiz-García; Manuel Carretero; Luis L. Bonilla; Klaus Biermann; Holger T. Grahn
Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

Noise-enhanced chaos in a doped, weakly coupled GaAs/Al0.45Ga0.55As superlattice has been observed at room temperature in experiments as well as in the results of the simulation of nonlinear transport based on a discrete tunneling model. When external noise is added, both the measured and simulated current-versus-time traces contain irregularly spaced spikes for particular applied voltages, which separate a regime of periodic current oscillations from a region of no current oscillations at all. In the voltage region without current oscillations, the electric-field profile consist of a low-field domain near the emitter contact separated by a domain wall consisting of a charge accumulation layer from a high-field regime closer to the collector contact. With increasing noise amplitude, spontaneous chaotic current oscillations appear over a wider bias voltage range. For these bias voltages, the domain boundary between the two electric-field domains becomes unstable and very small current or voltage fluctuations can trigger the domain boundary to move toward the collector and induce chaotic current spikes. The experimentally observed features are qualitatively very well reproduced by the simulations. Increased noise can consequently enhance chaotic current oscillations in semiconductor superlattices.

submitted time 2017-03-27 Hits12716Downloads651 Comment 0

6. chinaXiv:201609.01055 [pdf]

A review of μ-τ flavor symmetry in neutrino physics

Zhi-zhong Xing; Zhen-hua Zhao1
Subjects: Physics >> Nuclear Physics

Behind the observed pattern of lepton flavor mixing is a partial or approximate mu-tau flavor symmetry --- a milestone on our road to the true origin of neutrino masses and flavor structures. In this review article we first describe the features of mu-tau permutation and reflection symmetries, and then explore their various consequences on model building and neutrino phenomenology. We pay particular attention to soft mu-tau symmetry breaking, which is crucial for our deeper understanding of the fine effects of flavor mixing and CP violation.

submitted time 2016-09-18 Hits1230Downloads729 Comment 0

7. chinaXiv:201609.00254 [pdf]

A New Measurement of Antineutrino Oscillation with the Full Detector Configuration at Daya Bay

An, F. P. and others
Subjects: Physics >> Nuclear Physics

We report a new measurement of electron antineutrino disappearance using the fully-constructed Daya Bay Reactor Neutrino Experiment. The final two of eight antineutrino detectors were installed in the summer of 2012. Including the 404 days of data collected from October 2012 to November 2013 resulted in a total exposure of 6.9×105?GWth-ton-days, a 3.6 times increase over our previous results. Improvements in energy calibration limited variations between detectors to 0.2%. Removal of six?241Am-13C radioactive calibration sources reduced the background by a factor of two for the detectors in the experimental hall furthest from the reactors. Direct prediction of the antineutrino signal in the far detectors based on the measurements in the near detectors explicitly minimized the dependence of the measurement on models of reactor antineutrino emission. The uncertainties in our estimates of?sin22θ13?and?|Δm2ee|?were halved as a result of these improvements. Analysis of the relative antineutrino rates and energy spectra between detectors gave?sin22θ13=0.084±0.005?and?|Δm2ee|=(2.42±0.11)×10?3?eV2?in the three-neutrino framework.

submitted time 2016-09-09 Hits885Downloads562 Comment 0

8. chinaXiv:201609.00138 [pdf]

Measurement of yCP in D0 ? D0 oscillation using quantum correlations in e+e? → D0D0 at √s = 3.773GeV

Ablikim, M. and others
Subjects: Physics >> Nuclear Physics

We report a measurement of the parameter?yCP?in$\ensuremath{D^0}\xspace-\ensuremath{\overline{D}^{0}}\xspace$?oscillations performed by taking advantage of quantum coherence between pairs of?$\ensuremath{D^0}\xspace \ensuremath{\overline{D}^{0}}\xspace$?mesons produced in?e+e??annihilations near threshold. In this work, doubly-tagged$\ensuremath{D^0}\xspace \ensuremath{\overline{D}^{0}}\xspace$?events, where one?D?decays to a?CPeigenstate and the other?D?decays in a semileptonic mode, are reconstructed using a data sample of 2.92\,fb?1collected with the BESIII detector at the center-of-mass energy of?s√?= 3.773\,GeV. We obtain?yCP=(?2.0±1.3±0.7)%, where the first uncertainty is statistical and the second is systematic. This result is compatible with the current world average.

submitted time 2016-09-07 Hits188Downloads116 Comment 0

9. chinaXiv:201609.00051 [pdf]

An overview of the Daya Bay Reactor Neutrino Experiment

Jun Cao; Kam-Biu Luk
Subjects: Physics >> Nuclear Physics

The Daya Bay Reactor Neutrino Experiment discovered an unexpectedly large neutrino oscillation related to the mixing angle?θ13?in 2012. This finding paved the way to the next generation of neutrino oscillation experiments. In this article, we review the history, featured design, and scientific results of Daya Bay. Prospects of the experiment are also described.

submitted time 2016-09-05 Hits929Downloads483 Comment 0

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