887 research outputs found
〔論文〕個人主義・集団主義が高圧的説得への抵抗の理由に及ぼす効果:抵抗の動機としてのリアクタンスと調和維持
The purpose of this paper is to examine the difference between individualists and collectivists in their reasons for resistance to high-pressure communication. Reactance is assumed to be related to individualism. So, individualists would perceive high-pressure persuasion as a threat to freedom, and would resist it for this reason. In contrast, collectivists would perceive that coercive persuasion would disturb the harmony of group. It was hypothesized that horizontal individualism is positively associated with resistance due to freedom-infringement and that horizontal collectivism is positively associated with resistance due to harmony-disturbance, in response to coercive persuasion. Undergraduates (N=121) participated in a study to test these hypotheses. They were asked to read 5 short coercive communications and to rate these communications from two standpoints, that is, freedom-infringement and harmony-disturbance. A path analysis showed that horizontal individualism was positively associated with freedom-infringement, and that horizontal collectivism was positively associated with harmony-disturbance, as expected. Theoretical and practical implications of these findings are discussed
Adversarial Deep Hedging: Learning to Hedge without Price Process Modeling
Deep hedging is a deep-learning-based framework for derivative hedging in
incomplete markets. The advantage of deep hedging lies in its ability to handle
various realistic market conditions, such as market frictions, which are
challenging to address within the traditional mathematical finance framework.
Since deep hedging relies on market simulation, the underlying asset price
process model is crucial. However, existing literature on deep hedging often
relies on traditional mathematical finance models, e.g., Brownian motion and
stochastic volatility models, and discovering effective underlying asset models
for deep hedging learning has been a challenge. In this study, we propose a new
framework called adversarial deep hedging, inspired by adversarial learning. In
this framework, a hedger and a generator, which respectively model the
underlying asset process and the underlying asset process, are trained in an
adversarial manner. The proposed method enables to learn a robust hedger
without explicitly modeling the underlying asset process. Through numerical
experiments, we demonstrate that our proposed method achieves competitive
performance to models that assume explicit underlying asset processes across
various real market data.Comment: 8 pages, 7 figure
Gain Tuning Model of Human Expert for Looper Height Control in Hot Strip Rolling
In hot strip rolling mills, the looper control system is automated. However, the looper's behavior tends to be unstable in threading. Therefore, human expert always intervenes and stabilizes the looper's behavior by tuning PID gains and interposing manipulation variable of looper control system. In this paper, we propose a method based on the recurrent neural network to express PID gains tuning action by human. Furthermore, we propose two methods to update the model by learning. To check the effectiveness of the proposed learning methods, numerical simulation applied to the looper height control is carried out
Pulsed UCN production using a Doppler shifter at J-PARC
We have constructed a Doppler-shifter-type pulsed ultra-cold neutron (UCN)
source at the Materials and Life Science Experiment Facility (MLF) of the Japan
Proton Accelerator Research Complex (J-PARC). Very-cold neutrons (VCNs) with
136- velocity in a neutron beam supplied by a pulsed neutron
source are decelerated by reflection on a m=10 wide-band multilayer mirror,
yielding pulsed UCN. The mirror is fixed to the tip of a 2,000-rpm rotating arm
moving with 68- velocity in the same direction as the VCN. The
repetition frequency of the pulsed UCN is and the time width
of the pulse at production is . In order to increase the UCN
flux, a supermirror guide, wide-band monochromatic mirrors, focus guides, and a
UCN extraction guide have been newly installed or improved. The
-equivalent count rate of the output neutrons with longitudinal
wavelengths longer than is ,
while that of the true UCNs is . The spatial density at
production is . This new UCN source enables us to
research and develop apparatuses necessary for the investigation of the neutron
electric dipole moment (nEDM).Comment: 32 pages, 15 fugures. A grammatical error was fixe
Correlation-driven organic 3D topological insulator with relativistic fermions
Exploring new topological phenomena and functionalities induced by strong
electron correlation has been a central issue in modern condensed-matter
physics. One example is a topological insulator (TI) state and its
functionality driven by the Coulomb repulsion rather than a spin-orbit
coupling. Here, we report a "correlation-driven" TI state realized in an
organic zero-gap system -(BETS)I. The surface metallic state
that emerges at low temperatures exhibits characteristic transport properties
of a gapless Dirac semimetal, evidencing the presence of a topological surface
state in this compound. Moreover, we observe a topological phase switching
between the TI state and non-equilibrium Dirac semimetal state by a dc current,
which is a unique functionality of a correlation-driven TI state. Our findings
demonstrate that correlation-driven TIs are promising candidates not only for
practical electronic devices but also as a field for discovering new
topological phenomena and phases.Comment: 36 pages including 10 figure
Objective evaluation method using multiple image analyses for panoramic radiography improvement
Introduction: In the standardization of panoramic radiography quality, the education and training of beginners on panoramic radiographic imaging are important. We evaluated the relationship between positioning error factors and multiple image analysis results for reproducible panoramic radiography.
Material and methods: Using a panoramic radiography system and a dental phantom, reference images were acquired on the Frankfurt plane along the horizontal direction, midsagittal plane along the left-right direction, and for the canine on the forward-backward plane. Images with positioning errors were acquired with 1-5 mm shifts along the forward-backward direction and 2-10 degrees rotations along the horizontal (chin tipped high/low) and vertical (left-right side tilt) directions on the Frankfurt plane. The cross-correlation coefficient and angle difference of the occlusion congruent plane profile between the reference and positioning error images, peak signal-to-noise ratio (PSNR), and deformation vector value by deformable image registration were compared and evaluated.
Results: The cross-correlation coefficients of the occlusal plane profiles showed the greatest change in the chin tipped high images and became negatively correlated from 6 degrees image rotation (r = -0.29). The angle difference tended to shift substantially with increasing positioning error, with an angle difference of 8.9 degrees for the 10 degrees chin tipped low image. The PSNR was above 30 dB only for images with a 1-mm backward shift. The positioning error owing to the vertical rotation was the largest for the deformation vector value.
Conclusions: Multiple image analyses allow to determine factors contributing to positioning errors in panoramic radiography and may enable error correction. This study based on phantom imaging can support the education of beginners regarding panoramic radiography
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