Health care reform in South Korea

노트 : International Perspectives Foru

Two Higgs doublet models for the LHC Higgs boson data at s=\sqrt{s}= 7 and 8 TeV

Updated LHC data on the new 126 GeV boson during the 7 and 8 TeV runnings strengthen the standard model Higgs boson interpretation further. Through the global $\chi^2$ analysis, we investigate whether the new particle could be one of the scalar particles in two Higgs doublet models. Four types (Type I, II, X and Y) are comprehensively studied. Taking the recent analysis on the spin-parity of the new boson, we consider two scenarios: the new boson is either the light CP-even one ($h^0$) or the heavy CP-even one ($H^0$). It is found that both scenarios are consistent with the new data, not only in the parameter regions near the decoupling limit but also in other regions far from the decoupling limit. In addition, the current data are compatible with the possibility that the light Higgs boson $h^0$ is hidden in the mass window of 90-100 GeV. The diphoton or $\tau\tau$ channel can provide a probe of this possibility by the enhanced signal rates.Comment: To appear in JHE

Fast Recognition of birds in offshore wind farms based on an improved deep learning model

The safety of wind turbines is a prerequisite for the stable operation of offshore wind farms. However, bird damage poses a direct threat to the safe operation of wind turbines and wind turbine blades. In addition, millions of birds are killed by wind turbines every year. In order to protect the ecological environment and maintain the safe operation of offshore wind turbines, and to address the problem of the low detection capability of current target detection algorithms in low-light environments such as at night, this paper proposes a method to improve the network performance by integrating the CBAM attention mechanism and the RetinexNet network into YOLOv5. First, the training set images are fed into the YOLOv5 network with integrated CBAM attention module for training, and the optimal weight model is stored. Then, low-light images are enhanced and denoised using Decom-Net and Enhance-Net, and the accuracy is tested on the optimal weight model. In addition, the k-means++ clustering algorithm is used to optimise the anchor box selection method, which solves the problem of unstable initial centroids and achieves better clustering results. Experimental results show that the accuracy of this model in bird detection tasks can reach 87.40%, an increase of 21.25%. The model can detect birds near wind turbines in real time and shows strong stability in night, rainy and shaky conditions, proving that the model can ensure the safe and stable operation of wind turbines

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Department of ChemistryAnalysis of rotational spectra provides information about molecular structure and the rotational spectrum can also be used as a molecular fingerprint for molecule identification. Microwave spectroscopy is currently the most powerful tool to measure rotational spectra. High-resolution microwave spectroscopy can reach single kHz resolution and can get single Hz accuracy. Rotational Raman spectroscopy is a complementary method to microwave spectroscopy with different selection rules. But past Raman spectroscopy had a limited resolution, reaching only 100???s of MHz resolution. High-resolution mass-CRASY breaks this limitation with a new method for high-resolution measurements. Time-domain measurements produce high-resolution mass-correlated rotational Raman spectra, and we obtained a resolution below 1 MHz resolution and kHz accuracy. In addition to high-resolution spectra, our technique produces correlated spectroscopic data. With mass-correlated information, we can assign signals for multiple molecules in an impure sample without purification. Here, we use this capability to resolve isotopologue spectra from naturally heterogeneous samples. Our technique is still a new spectroscopic tool, so we need to prove its reliability. In this thesis, I describe the characterization of numerous molecules which J characterized with high-resolution mass-CRASY during my thesis. The measured molecules are linear, symmetric tops, and asymmetric tops all of which are Raman active. I prove the reliability and accuracy of CRASY by comparison to literature data, where available. The development and application of this new high-resolution technique allowed to obtain precise spectroscopic information for a large range of molecules.ope

What Questions do People Ask on a Human Papillomavirus Website? A Comparative Analysis of Public and Private Questions

Objective: In 2004, we launched the question and answer (Q&A) section on a human papillomavirus (HPV) website (www.hpvkorea.org) that provides ample and regularly updated information about HPV. The purpose of this study is to collect data pertaining to questions posed on this website about HPV and its related diseases and analyze the type of questions and frequency before and after introduction of HPV vaccine in Korea. Using these results, we intend to determine the clinical and practical implications for doctors treating HPV and for HPV website providers

Molecular-Beam Spectroscopy with an Infinite Interferometer: Spectroscopic Resolution and Accuracy

An interferometer with effectively infinite maximum optical path difference removes the dominant resolution limitation for interferometric spectroscopy. We present mass-correlated rotational Raman spectra that represent the world's highest resolution scanned interferometric data and discuss the current and expected future limitations in achievable spectroscopic performance.Comment: 8 pages, 12 figures, 1 table, submitted to the Journal of the Korean Physical Societ