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Nano-Micro Letters 2023年第6期15卷 1-23页

作者： Horim lee Seung Han Ryu Suk Jin Kwon Jae Ryung Choi Sang‑bok lee Byeongjin Park Composites Research Division Korea Institute of Materials Science797 ChangwondaeroSeongsan‑GuChangwonGyeongsangnam‑Do 51508Republic of Korea

Although there is a high demand for absorption-dominant electromagnetic interference(EMI) shielding materials for 5G millimeter-wave(mmWave) frequencies, most current shielding materials are based on reflection-dominant conductive materials. While there are few absorption-dominant shielding materials proposed with magnetic materials, their working frequencies are usually limited to under 30 GHz. In this study, a novel multi-band absorption-dominant EMI shielding film with M-type strontium ferrites and a conductive grid is proposed. This film shows ultralow EMI reflection of less than 5% in multiple mmWave frequency bands with sub-millimeter thicknesses, while shielding more than 99.9% of EMI. The ultralow reflection frequency bands are controllable by tuning the ferromagnetic resonance frequency of M-type strontium ferrites and composite layer geometries. Two examples of shielding films with ultralow reflection frequencies, one for 39 and 52 GHz 5G telecommunication bands and the other for 60 and 77 GHz autonomous radar bands, are presented. The remarkably low reflectance and thinness of the proposed films provide an important advancement toward the commercialization of EMI shielding materials for 5G mmWave applications.

关键词： 5G communication MmWave EMI shielding M-type ferrites

Grobner-Shirshov Bases for Exceptional Lie Superalgebras

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Algebra Colloquium 2015年第1期22卷 1-10页

作者： dong-il lee Department of Mathematics Seoul Women's University Seoul 139-774 Korea

For exceptional Lie superalgebras D（2, 1; α）, G（3） and F（4）, GrSbner-Shirshov bases and the corresponding super-Lyndon-Shirshov monomial bases are constructed.

关键词： Grobner-Shirshov basis Lie superalgebra super-Lyndon-Shirshov monomial

Computation and field experiment validation of greenhouse energy load using building energy simulation model

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International Journal of Agricultural and Biological Engineering 2015年第6期8卷 116-127页

作者： Taehwan Ha In-bok lee Kyeong-seok Kwon Se-Woon Hong College of Agriculture and Life Sciences Seoul National University1 Gwanak-roGwanak-guSeoul 151-921Korea Research Institute of Agriculture and Life Sciences 1 Gwanak-roGwanak-guSeoul 151-921Korea Institute for Agricultural and Fisheries Research(ILVO) Burg.Van Gansberghelaan 1159820 MerelbekeBelgium

Greenhouse Building Energy Simulation(BES)models were developed to estimate the energy load using TRNSYS(ver.16,University of Wisconsin,USA),a commercial BES *** was conducted based on data recorded during field *** BES greenhouse modeling is reliable,as validation showed 5.2%and 5.5%compared with two field experiments,*** the next step,the heating characteristics of the greenhouses were analyzed to predict the maximum and annual total heating loads based on the greenhouse types and target locations in the Republic of Korea using the validated greenhouse *** BES-computed results indicated that the annual heating load was greatly affected by the local climate conditions of the target *** annual heating load of greenhouses located in Chuncheon,the northernmost region,was 44.6%higher than greenhouses in Jeju,the southernmost area among the studied *** regression models for prediction of maximum heating load of Venlo type greenhouse and widespan type greenhouse were developed based on the BES computed results to easily predict maximum heating load at field and they explained nearly 95%and 80%of the variance in the data set used,respectively,with the predictor *** a BES model of geothermal energy system was additionally designed and incorporated into the BES greenhouse *** feasibility of the geothermal energy system for greenhouse was estimated through economic analysis.

关键词： Greenhouse building energy simulation(BES) energy load dynamic analysis geothermal energy heating load

Impact of Horizontal Resolution and Cumulus Parameterization Scheme on the Simulation of Heavy Rainfall Events over the Korean Peninsula

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Advances in Atmospheric Sciences 2011年第1期28卷 1-15页

作者： Seung-Woo lee dong-Kyou lee dong-Eon CHANG School of Earth and Environmental Sciences Seoul National University National Institute of Meteorological Research Korea Meteorological Administration

In this paper, we present the results from high-resolution numerical simulations of three heavy rainfall events over the Korean Peninsula. The numerical results show that the prediction accuracy for heavy rainfall events improved as horizontal resolution increased. The fine-grid precipitation fields were much closer to the real precipitation fields in the case of large synoptic forcing over the Korean Peninsula. In the case of large convective available potential energy and weak synoptic forcing, it seems that even when using a high resolution, the models still showed poor performance in reproducing the observed high precipitation amounts. However, activation of the cumulus parameterization scheme in the intermediate resolution of 9 km, even at a grid spacing of 3 km, had a positive impact on the simulation of the heavy rainfall event.

关键词： high resolution cumulus parameterization scheme heavy rainfall numerical simulation

Highly dense and ultrathin gadolinia-doped ceria interlayer for enhanced performance of large-area anode-supported solid oxide fuel cell

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Progress in Natural Science:Materials International 2023年第5期33卷 733-741页

作者： Sang Woo Shin Amjad Hussain Muhammad Zubair Khan dong Woo Joh Tak-Hyung Lim Seung-bok lee Jong-Eun Hong Joon Hyung Shim Rak-Hyun Song Hydrogen Energy Research Division Korea Institute of Energy Research Department of Mechanical Engineering Korea University Department of Advanced Energy and System Engineering Korea University of Science and Technology(UST) 4. Department of Materials Science & Engineering Pak-Austria Fachhochschule: Institute of Applied Sciences and Technology

The fabrication of a highly dense and ultrathin Gd doped ceria(GDC) interlayer on a large-area, porous electrolyte-coated planar anode support using vacuum slurry coating is studied for application in solid oxide fuel cells(SOFCs). The electrolyte-coated planar anode support body is fabricated by tape casting and pre-sintering is performed at 1100, 1150, and 1200°C. The GDC interlayer is coated onto the pre-sintered electrolyte-coated anode support using a vacuum slurry coating process with different immersion times(30–60 s). A highly dense and ultrathin GDC interlayer with a thickness of 1.48 μm is produced after co-sintering at 1400°C. The 1200°C pre-sintered electrolyte-coated anode support showed a thin and highly dense GDC interlayer which is attributed to a lower shrinkage difference between the coated GDC interlayer and pre-sintered body. The electrochemical performance of a vacuum slurry-coated GDC interlayer cell is 38 % higher compared to that of the screen-printed GDC-coated cell at 700°C due to the greatly reduced Ohmic and electrode polarization resistances. The considerable improvement in the performance is attributed to the ultrahigh GDC density which has prevented the secondary phase formation between the cathode and electrolyte. This study presents the economical, scalable, and reproducible process for the fabrication of highly robust GDC interlayer for the large-area planar anode-supported SOFCs.

关键词： Solid oxide fuel cell Vacuum slurry coating GDC interlayer Sintering Performance

Nasal cavity fungus ball discovered accidentally:A case report

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World Journal of Clinical Cases 2025年第5期13卷 44-48页

作者： Dae-Neung lee dong Hoon lee Sang Chul Lim Department of Otolaryngology-Head and Neck Surgery Chonnam National University Medical SchoolChonnam National University Hwasun HospitalHwasun 58128South Korea Department of Otolaryngology-Head and Neck Surgery Chonnam National University Medical SchoolHwasun HospitalChonnam National University Hwasun HospitalHwasun 58128South Korea Department of Otolaryngology-Head and Neck Surgery Chonnam National University Medical SchoolKwangju 501190South Korea

BACKGROUND Fungal balls within the nasal cavity are an exceedingly rare clinical entity,typically presenting with nonspecific symptoms or being identified *** SUMMARY This report presents an incidental discovery of a fungal ball in the nasal cavity during routine imaging,with no associated clinical *** This case underscores the importance of considering the possibility of asympto-matic presentations of nasal fungal balls,which may be detected incidentally during imaging evaluations.

关键词： Fungi Mycoses Fungus ball Nasal cavity Nasal surgical procedures Case report

Effects of ice storm on species richness and abundance of resident birds in subtropical forest in southern China

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Integrative Zoology 2020年第6期15卷 522-532页

作者： Myung-bok lee Yongmi HONG Zufei SHU Qiang ZHANG Fasheng ZOU Guangdong Key Laboratory of Animal Conservation and Resource Utilization Guangdong Public Laboratory of Wild Animal Conservation and UtilizationGuangdong Institute of Applied Biological ResourcesGuangzhouChina Guangdong Chebaling National Nature Reserve ShixingChina

Between January and February 2008,a severe ice storm occurred in southern *** storm damaged nearly 21 million hectares of forest lands with broken branch,trunk breakage,and stem bending of many *** natural disturbance provides a unique opportunity to study impacts of extreme climatic event on forest *** hierarchical multi-species occupancy model(species richness;27 species)and N-mixture model(abundance;3 species),we investigated how the storm affected resident bird species in subtropical forest in southern *** sampled birds at Chebaling National Nature Reserve in Guangdong Province,monthly for 1 year each before and after the storm by mist *** take into account variations in temperature between years and between months,we incorporated monthly mean temperature into the models as an additional *** species richness was greater before the *** species richness(from the hierarchical model)also tended to be greater before than after the storm although 95%Bayesian credible intervals of these estimates were *** showed a negative effect on estimated species richness,indicating greater species richness during *** three species captured the most,abundance of Chestnut Bulbul(Hemixos castanonotus)significantly decreased after the *** two species,Grey Treepie(Dendrocitta formosae)and Huet’s Fulvetta(Alcippe hueti)showed insignificant responses to the *** study indicates that the 2008 ice storm may not have a significant impact on species richness of resident birds in subtropical forest;however,the effect can be species-specific and negative to some species’population.

关键词： abundance forest birds hierarchical model ice storm species richness

Improvement in Background Error Covariances Using Ensemble Forecasts for Assimilation of High-Resolution Satellite Data

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Advances in Atmospheric Sciences 2011年第4期28卷 758-774页

作者： Seung-Woo lee dong-Kyou lee School of Earth and Environmental Sciences Seoul National University

Satellite data obtained over synoptic data-sparse regions such as an ocean contribute toward improving the quality of the initial state of limited-area models. Background error covariances are crucial to the proper distribution of satellite-observed information in variational data assimilation. In the NMC （National Meteorological Center） method, background error covariances are underestimated over data-sparse regions such as an ocean because of small differences between different forecast times. Thus, it is necessary to reconstruct and tune the background error covariances so as to maximize the usefulness of the satellite data for the initial state of limited-area models, especially over an ocean where there is a lack of conventional data. In this study, we attempted to estimate background error covariances so as to provide adequate error statistics for data-sparse regions by using ensemble forecasts of optimal perturbations using bred vectors. The background error covariances estimated by the ensemble method reduced the overestimation of error amplitude obtained by the NMC method. By employing an appropriate horizontal length scale to exclude spurious correlations, the ensemble method produced better results than the NMC method in the assimilation of retrieved satellite data. Because the ensemble method distributes observed information over a limited local area, it would be more useful in the analysis of high-resolution satellite data. Accordingly, the performance of forecast models can be improved over the area where the satellite data are assimilated.

关键词： 3DVAR background error covariances retrieved satellite data assimilation ensemble forecasts.

Simplified fistula dilation technique and modified stent deployment maneuver for EUS-guided hepaticogastrostomy

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World Journal of Gastroenterology 2014年第17期20卷 5051-5059页

作者： Woo Hyun Paik Do Hyun Park Jun-Ho Choi Joon Hyuk Choi Sang Soo lee dong Wan Seo Sung Koo lee Myung-Hwan Kim Jung bok lee Division of Gastroenterology Department of Internal MedicineUniversity of Ulsan College of MedicineAsan Medical CenterSeoul 138-736South Korea Department of Internal Medicine Inje University Ilsan Paik HospitalKoyang 411-706South Korea Department of Clinical Epidemiology and Biostatics University of Ulsan College of MedicineAsan Medical CenterSeoul 138-736South Korea

AIM: To evaluate the success rates, procedural time and adverse event rates of the modified methods in endoscopic ultrasonography-guided hepaticogastrostomy (EUS-HGS).

关键词： Endoscopic ultrasonography Biliary drainage Hepaticogastrostomy Treatment outcome Adverse event

Myostatin gene role in regulating traits of poultry species for potential industrial applications

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Journal of Animal Science and Biotechnology 2024年第5期15卷 1793-1801页

作者： Joonbum lee dong‑Hwan Kim Kichoon lee Department of Animal Sciences The Ohio State UniversityColumbusOH 43210USA

The myostatin(MSTN)gene is considered a potential genetic marker to improve economically important traits in live-stock,since the discovery of its function using the MSTN knockout *** anti-myogenic function of the MSTN gene was further demonstrated in farm animal species with natural or induced *** poultry species,myo-genesis in cell culture was regulated by modulation of the MSTN ***,different expression levels of the MSTN gene in poultry models with different muscle mass have been reported,indicating the conserved myogenic function of the MSTN gene between mammalian and avian *** advances of CRISPR/Cas9-mediated genome edit-ing techniques have led to development of genome-edited poultry species targeting the MSTN gene to clearly dem-onstrate its anti-myogenic function and further investigate other potential functions in poultry *** review summarizes research conducted to understand the function of the MSTN gene in various poultry models from cells to whole ***,the genome-edited poultry models targeting the MSTN gene are reviewed to inte-grate diverse effects of the MSTN gene on different traits of poultry species.

关键词： Chicken Economic traits Myostatin Quail