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High-index-contrast photonic structures:a versatile platform for photon manipulation

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Light(Science & Applications) 2022年第11期11卷 2617-2632页

作者： Young-Bin kim Jin-Woo Cho Yun-Jo Lee Dukkyu Bae Sun-kyung kim Department of Applied Physics Kyung Hee UniversityYonginGyeonggido 17104Republic of Korea Hexa Solution Co. LtdSuwonGyeonggi-do 16229Republic of Korea

In optics,the refractive index of a material and its spatial distribution determine the characteristics of light ***,exploring both low-and high-index materials/structures is an important consideration in this *** cavities,which are defined as low-index bases,exhibit a variety of unusual or even unexplored optical characteristics and are used in numerous functionalities including diffraction gratings,localised optical antennas and low-loss *** this report,we discuss the fabrication of hollow cavities of various sizes(O.2-5μm in diameter)that are supported by conformal dielectric/metal shells,as well as their specific applications in the ultraviolet(photodetectors),visible(light-emitting diodes,solar cells and metalenses),near-infrared(thermophotovoltaics)and mid-infrared(radiative coolers)*** findings demonstrate that hollow cavities tailored to specific spectra and applications can serve as versatile optical platforms to address the limitations of current optoelectronic ***,hollow cavity embedded structures are highly elastic and can minimise the thermal stress caused by high *** such,future applications will likely include high-temperature devices such as thermophotovoltaics and concentrator photovoltaics.

关键词： versatile index ultraviolet

Breast adenoid cystic carcinoma arising in microglandular adenosis:A case report and review of literature

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World Journal of Clinical Cases 2021年第25期9卷 7579-7587页

作者： Jin kyung An Jeong Joo Woo Eun kyung kim Hee Yong Kwak Department of Radiology Nowon Eulji Medical CenterEulji University School of MedicineSeoul 01830South Korea Department of Pathology Nowon Eulji Medical CenterEulji University School of MedicineSeoul 01830South Korea Department of Surgery Nowon Eulji Medical CenterEulji University School of MedicineSeoul 01830South Korea

BACKGROUND Breast adenoid cystic carcinoma(AdCC)is a rare invasive carcinoma composed of epithelial and myoepithelial *** adenosis(MGA)is a rare benign proliferative lesion consisting of small,uniform,and round glands formed by a single layer of epithelial cells and basement membrane without a myoepithelial cell *** may progress to atypical MGA and carcinoma arising in *** various invasive carcinomas from MGA,AdCC has been rarely ***,we report a case of AdCC arising in *** SUMMARY A 59-year-old woman was diagnosed with a newly developed density on a routine *** density was similar to or slightly lower than that of the breast *** showed an irregular mass with a slightly higher echo than that of *** resonance imaging showed an irregular mass with a similar T1 signal intensity and a slightly higher T2 signal intensity compared to muscles or the breast *** lesion showed heterogeneous internal enhancement with an initially slow and delayed persistent enhancing ***,the tumor was composed of invasive AdCC,in situ AdCC,and *** is composed of basaloid and ductal epithelial cells forming cribriform or solid sheets,or haphazardly scattered small cribriform or tubular *** showed small glands with a single epithelial lining and retained lumen.S-100 staining was strongly positive in MGA *** patient underwent breast-conserving surgery with sentinel lymph node *** Breast AdCC arising in MGA showed unique imaging findings that was different from usual invasive cancer.

关键词： Breast neoplasms Fibrocystic breast disease Carcinoma Adenoid cystic Case report

Second to fourth digit ratio： a predictor of adult penile ength

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Asian Journal of Andrology 2011年第5期13卷 710-714页

作者： In Ho Choi Khae Hawn kim Han Jung Sang Jin Yoon Soo woong kim Tae Beom kim Department of Urology Gachon University Gil Hospital Incheon Korea Department of Urology Seoul National University College of Medicine Seoul Korea

The second to fourth digit ratio （2D：4D） has been proposed as a putative biomarker for prenatal testosterone and covaries with the sensitivity of the androgen receptor （AR）. Both prenatal testosterone and the AR play a central role in penile growth. In this study, we investigated the relationship between digit ratio and penile length. Korean men who were hospitalized for urological surgery at a single tertiary academic centre were examined in this study, and 144 men aged 20 years or older who gave informed consent were prospectively enrolled. Right-hand second- and fourth-digit lengths were measured by a single investigator prior to measurement of penile length. Under anaesthesia, flaccid and stretched penile lengths were measured by another investigator who did not measure nor have any the information regarding the digit lengths. Univariate and multivariate analysis using linear regression models showed that only height was a significant predictive factor for flaccid penile length （univariate analysis： r=0. 185, P=-0.026; multivariate analysis： r=-0.172, P=0.038） and that only digit ratio was a significant predictive factor for stretched penile length （univariate analysis： r=-0.216, P=0.009; multivariate analysis： r=-0.201, P=0.024; stretched penile length=-9.201 xdigit ratio ＋ 20.577）. Based on this evidence, we suggest that the digit ratio can predict adult penile size and that the effects of prenatal testosterone may in part explain the differences in adult penile length.

关键词： digit ratio flaccid penile length stretched penile length

FEA technique of hot plate forming process using cell-typed die with cooling device

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中国有色金属学会会刊：英文版 2012年第S3期22卷 831-837页

作者： Jung-Min LEE In-Kyu LEE kyung-Hun LEE Dae-Soon kim Byung-Min kim Dongnam Regional Division Korea Institute of Industrial Technology School of Mechanical Engineering Pusan National University Industrial Technology Division Hyundai Heavy Industries

Hot plate forming using a cell-typed die is a process for forming a large thick plate with a spherical shape for the manufacture of a large spherical LNG ***-typed upper and lower dies made of a framework of steel plates fitted to make a grid pattern are used in this process,and an air-cooling device is separately installed inside the lower die.A finite element analysis (FEA) technique was developed,which included hot forming,air flow,cooling and thermal deformation analysis for the hot plate forming process using the cell-typed ***,the convective and interface heat transfer coefficients were used to reproduce analytically the effects of the cooling device in the hot plate forming analysis.A small-scale model test of the process was conducted to verify the FEA *** analysis results show that the curvature of the final plate agrees well with that of the designed experiment within a maximum relative error of 0.03% at the corner of the plate.

关键词： cell-typed die hot plate forming spherical LNG tank heat transfer coefficient

Stud welding for fixation of cryogenic insulation of membrane tanks in LNG ship building

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中国有色金属学会会刊：英文版 2009年第B9期19卷 271-275页

作者： Jeong-Soo LEE Young-Soo RYU Nam-In kim Bong-Joon kim Yoo-kyung kim Myung-Hyun kim Hanjin Heavy Industries & Construction Co. Ltd Department of Naval Architecture and Ocean Engineering Pusan National University

The support plates including all of the inner hulls such as E grade steel, weld seams and SUS304L were considered to establish the optimal stud welding condition in LNG ship building. The stainless steel plate was especially applied to the bracket on the liquid dome. The polished and etched surfaces of the welded stud and support plate were examined if the bead was properly formed. With the micrographic examination, the fusion boundary of metal weld zone formed by stud welding was analyzed to optimize the welding parameters. And also the analysis of the unacceptable welding faults such as cold and hot weld were performed. The mechanical tests such as tensile tests and bending tests were carried out to reveal any abnormal variation in the relationship of process parameters and the strength.

关键词：螺柱焊接 LNG船绝缘膜优化工艺参数低温坦克不锈钢板最佳条件

A Unified Buffering Management with Set Divisible Cache for PCM Main Memory

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Journal of Computer Science & Technology 2016年第1期31卷 137-146页

作者： Mei-Ying Bian Su-kyung Yoon Jeong-Geun kim Sangjae Nam Shin-Dug kim Department of Computer Science Yonsei University Seoul 120-749 Korea

This research proposes a phase-change memory （PCM） based main memory system with an effective combi- nation of a superblock-based adaptive buffering structure and its associated set divisible last-level cache （LLC）. To achieve high performance similar to that of dynamic random-access memory （DRAM） based main memory, the superblock-based adaptive buffer （SABU） is comprised of dual DRAM buffers, i.e., an aggressive superblock-based pre-fetching buffer （SBPB） and an adaptive sub-block reusing buffer （SBRB）, and a set divisible LLC based on a cache space optimization scheme. According to our experiment, the longer PCM access latency can typically be hidden using our proposed SABU, which can significantly reduce the number of writes over the PCM main memory by 26.44%. The SABU approach can reduce PCM access latency up to 0.43 times, compared with conventional DRAM main memory. Meanwhile, the average memory energy consumption can be reduced by 19.7%.

关键词： memory hierarchy memory structure,cache memory buffer management

Lattice Boltzmann model of percutaneous drug absorption

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Theoretical & Applied Mechanics Letters 2019年第1期9卷 1-6,I0006页

作者： Arman Safdari kyung Chun kim School of Mechanical Engineering Pusan National University

A lattice Boltzmann numerical modeling method was developed to predict skin concentration after topical application of a drug on the skin. The method is based on D2Q9 lattice spaces associated with the Bhatnagar-Gross-Krook(BGK) collision term to solve the convection-diffusion equation(CDE). A simulation was carried out in different ranges of the value of bound γ, which is related to skin capillary clearance and the volume of diffusion during a percutaneous absorption process. When a typical drug is used on the skin, the value of γ corresponds to the amount of drug absorbed by the blood and the absorption of the drug added to the skin. The effect of γ was studied for when the region of skin contact is a line segment on the skin surface.

关键词： Lattice Boltzmann method Bhatnagar-Gross-Krook (BGK) Single relaxation time Advection-diffusion Convection-diffusion equation (CDE)

Treatment satisfaction after I year high-power potassiumtitanyl-phosphate photoselective vaporization of the prostate

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Asian Journal of Andrology 2010年第5期12卷 728-734页

作者： Ja Hyeon Ku Min Chul Cho Hyeong Seok kim Jae-Seung Paick Soo woong kim Department of Urology Seoul National University Hospital Seoul 100-744 Korea

To investigate the factors that influence treatment satisfaction after high-power potassium-titanyl-phosphate （KTP） laser vaporization of the prostate, we compared the characteristics between patients who were satisfied and those who were not satisfied. In all, 97 patients aged between 53-82 years （median age 67 years） underwent high-power KTP laser vaporization of the prostate for lower urinary tract symptoms due to benign prostatic hyperplasia. At 12 months postoperatively, 60 patients were satisfied with the treatment, whereas 37 were dissatisfied. Although there were no differences in International Prostate Symptom Score （IPSS） values at baseline, the satisfied group scored better in total IPSS at 1, 3, 6, and 12 months postoperatively （P 〈 0.05）. At baseline, the maximum flow rate （Qmax） was lower in the dissatisfied group and remained low throughout the follow-up period, with the exception of 1 month postoperatively （P 〈 0.05）, compared with the satisfied group. There were no differences in other objective data between the two groups, including post-void residual and the number of voids based on the frequency-volume charts. In a multivariate model, a higher bladder contractility index was associated with a greater likelihood of treatment satisfaction 12 months after high-power KTP laser vaporization （odds ratio 1.024, 95% confidence interval 1.001-1.048, P 〈 0.05）. Patients who were not satisfied following the surgery had a smaller improvement in subjective symptoms and Qmax. In addition, our findings suggest that the relative risk of treatment dissatisfaction following high-power KTP laser vaporization was increased in patients with weak detrusor contractility.

关键词： benign prostatic hyperplasia potassium-titanyl-phosphate prostate satisfaction vaporization

Early prediction of myocardial viability after acute myocardial infarction by two-dimensional speckle tracking imaging

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Journal of Geriatric Cardiology 2015年第5期12卷 474-481页

作者： Jong Shin Woo Tae-kyung Yu Woo-Shik kim Kwon Sam kim Weon kim Division of Cardiology Department of lnternal Medicine Kyung Hee University Hospital Kyung Hee University Seoul South Korea

Background Identifying the transmural extent of myocardial necrosis and the degree of myocardial viability in acute myocardial infarction （AMI） is important clinically. The aim of this study was to assess myocardial viability using two-dimensional speckle tracking imaging （2D-STI） in patients with AMI. Methods 2D-STI was performed at initial presentation, three days, and six months after primary percutaneous coronary intervention （PCI） in 30 patients with AMI, who had a left anterior descending coronary artery （LAD） culprit lesion. In addition, 20 patients who had minimal stenotic lesions （〈 30% stenosis） on coronary angiography were also included in the control group. At six months dobutamine echocardiography was performed for viability assessment in seven segments of the LAD territory. According to the recovery of wall motion abnormality, segments were classified as viable or non-viable. Results A total of 131 segments were viable, and 44 were nonviable. Multivariate analysis revealed significant differences between the viable and nonviable segments in the peak systolic strain, the peak systolic strain rate at initial presentation, and peak systolic strain rate three days after primary PCI. Among these, the initial peak systolic strain rate had the highest predictive value for myocardial viability （hazard ratio： 31.22, P 〈 0.01）. Conclusions 2D-STI is feasible for assessing myocardial viability, and the peak systolic strain rate might be the most reliable predictor of myocardial viability in patients with AMI.

关键词： Acute myocardial infarction Two-dimensional speckle tracking imaging Viable myocardium