Projections of summertime ozone concentration over East Asia under multiple IPCC SRES emission scenarios

Lee, Jae-Bum,Cha, Jun-Seok,Hong, Sung-Chul,Choi, Jin-Young,Myoung, Ji-Su,Park, Rokjin J.,Woo, Jung-Hun,Ho, Changhoi,Han, Jin-Seok,Song, Chang-Keun Elsevier 2015 Atmospheric environment Vol.106 No.-

<P><B>Abstract</B></P> <P>We have developed the Integrated Climate and Air Quality Modeling System (ICAMS) through the one-way nesting of global–regional models to examine the changes in the surface ozone concentrations over East Asia under future climate scenarios. Model simulations have been conducted for the present period of 1996–2005 to evaluate the performance of ICAMS. The simulated surface ozone concentrations reproduced the observed monthly mean concentrations at sites in East Asia with high R<SUP>2</SUP> values (0.4–0.9), indicating a successful simulation to capture both spatial and temporal variability. We then performed several model simulations with the six IPCC SRES scenarios (A2, A1B, A1FI, A1T, B1, and B2) for the next three periods, 2016–2025 (the 2020s), 2046–2055 (the 2050s), and 2091–2100 (the 2090s). The model results show that the projected changes of the annual daily mean maximum eight-hour (DM8H) surface ozone concentrations in summertime for East Asia are in the range of 2–8 ppb, −3 to 8 ppb, and −7 to 9 ppb for the 2020s, the 2050s, and the 2090s, respectively, and are primarily determined based on the emission changes of NO<SUB>x</SUB> and NMVOC. The maximum increases in the annual DM8H surface ozone and high-ozone events occur in the 2020s for all scenarios except for A2, implying that the air quality over East Asia is likely to get worse in the near future period (the 2020s) than in the far future periods (the 2050s and the 2090s). The changes in the future environment based on IPCC SRES scenarios would also influence the change in the occurrences of high-concentrations events more greatly than that of the annual DM8H surface ozone concentrations. Sensitivity simulations show that the emissions increase is the key factor in determining future regional surface ozone concentrations in the case of a developing country, China, whereas a developed country, Japan would be influenced more greatly by effects of the regional climate change than the increase in emissions.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Change in ozone level is determined by the combination of NO<SUB>x</SUB> and NMVOC emissions. </LI> <LI> Ozone level over East Asia would get worse in the near future (the 2020s) than far future. </LI> <LI> A high-concentration event generally increases and more frequently occurs in the future. </LI> <LI> Change in ozone air quality in a developing country depends more on emissions change. </LI> <LI> Change in ozone air quality in a developed country depends more on climate change. </LI> </UL> </P>

보조호르몬요법을 받는 여성 유방암 환자의 모발 변화와 치료 실태에 대한 기초 연구

이재경 ( Jae Kyung Lee ),김창현 ( Chang-hyun Kim ),홍동균 ( Dongkyun Hong ),정경은 ( Kyung Eun Jung ),서영준 ( Young-joon Seo ),김창덕 ( Chang-deok Kim ),이진선 ( Jin Sun Lee ),권인선 ( In Sun Kwon ),박상현 ( Sanghyun Park ),이영 대한피부과학회 2021 대한피부과학회지 Vol.59 No.7

Background: Hormone therapy, which includes tamoxifen and aromatase inhibitors, is the most common adjuvant therapy used for breast cancer. However, only a few studies have reported endocrine therapy induced alopecia. Objective: We investigated the effects of long-term adjuvant hormone therapy on hair in patients with breast cancer, in addition to patients’ concerns and current treatment for hair loss. Methods: Patients completed a questionnaire that included information on self-perceived hair changes after each adjuvant therapy session, distress, and current treatment for hair loss. Using a folliscope, we measured hair density and thickness in each patient and in healthy controls. Results: The study included 93 patients with breast cancer (mean age 51.9±9.8 years). The density and hair thickness were 106.36±21.85 hairs/cm2 and 0.07±0.01 mm in the patient group and 147.86±30.67 hairs/cm2 and 0.07±0.01 mm in the control group (n=98, mean age 52.10±8.40 years), respectively. The mean hair density was significantly lower in the patient group than in the control group; however, no statistically significant intergroup difference was observed in hair thickness. Among 76 patients who perceived hair changes after adjuvant therapy, 71.1% (n=54) were distressed with regard to hair changes. However, only 7.8% of the patients, including two who were treated by dermatologists, currently received treatment for hair changes. Conclusion: Dermatologists should be familiar with hair changes in patients with breast cancer and provide appropriate education to encourage patients to consult dermatologists for hair loss and thinning after breast cancer treatment. (Korean J Dermatol 2021;59(7):521∼526)

북한의 급변사태 및 대량탈북에 따른 경찰 대응방안 연구

남재성(Nam Jae Sung),이창무(Lee Chang Moo) 한국공안행정학회 2013 한국공안행정학회보 Vol.22 No.1

국내외를 불문하고 김정은 체제에 대한 심각한 우려가 제기되고 있는 현실에 비추어 볼 때 가까운 장래에 북한의 급격한 정세변화와 대한민국에 대한 잠재적 위해요소의 등장은 우리가 반드시 겪게 될 현실이고 반드시 막아야할 문제라는 점에서 개방된 사고로 모든 가능성을 염두하고 대책을 수립해야 한다. 따라서 이 연구에서는 국가 차원뿐만 아니라 세부적으로 경찰 차원에서, 김정은 체제 이후 예상되는 북한 내부의 권력투쟁과 그에 따른 사회적 혼란 및 잠재적 위해요소, 그리고 그로 인한 북한 주민의 대량 탈북사태와 국내 유입 등 치안과 안보위해 상황을 다각도로 검토해보고 무엇보다도 경찰의 대응방안을 중심으로 대책을 마련하고자 하였다. 연구결과 여러 위협 변수들에도 불구하고 현 상태에서 당장 급격한 변화와 북한 정권의 붕괴 가능성은 높지 않다고 보인다. 하지만 북한체제의 특성상, 북한의 급변사태가 언제든 발생할 수 있다는 측면에서 항상 예의주시해야 할 것이며, 경찰은 북한의 급변사태에 따라 대량 탈북사태가 발생했을 경우 신속히 대응할 수 있는 즉응적 대비태세를 갖추어야 할 것이다. 특히, 이에 대한 대비태세는 대량 탈북 등 급변사태 발생이전의 사전적 역량강화 방안, 평시상황이지만 준 급변사태 발생단계에서 나타날 수 있는 대량 탈북사태 대응 방안, 급변사태 발생시의 대량 탈북사태 대응 방안 등으로 구분하여 수립하는 것이 타당할 것이다. 따라서 향후 보안경찰은 이 세 가지의 대응방안을 중심으로 조직적, 인력적 역량을 강화하고 대응을 위한 세부 시나리오를 마련하는 등 대량탈북 사태와 같은 북한의 급변사태에 신속히 대응할 수 있는 철저한 준비태세를 확립해야 할 것이다. In the midst of present situation where a serious concern is being raised at the national and international level on Kim Jong-un regime, it is inevitable that we will certainly experience North Korea's sudden changes in the state of affairs and the appearance of potentially dangerous elements towards South Korea against which we must defend. Accordingly, we must develop measures of responses for every possibility with open mind. The purpose of this study, accordingly, was to extensively examine not only at the national level but also at the specific level of the police the North Korean power struggle and according social disorder, potentially dangerous elements, massive defections of North Koreans and their inflow to South Korea and situations that present risk to public order and national security in order to develop various measures of responses centering on the response of the police. The study result shows that in spite of numerous variables of threat, the possibility of immediate and sudden changes in North Korea and the collapse of its regime does not appear to be high. According to the characteristics of the North Korea regime, however, there is a need for constant and close watch in the sense that sudden changes could occur at anytime in North Korea. Additionally, it was found that it would be necessary for the police to be equipped with instant readiness for swiftly responding to any massive defections of North Koreans according to sudden changes in North Korea. It was revealed that it would be appropriate to develop measures of responses by dividing them into a preemptive measure of reinforcing capabilities prior to the occurrence of sudden changes such as massive defections, a response measure against massive defections that could occur at the stage of semi-sudden changes during peacetime situation and a response measure against massive defections that occurs at the occurrence of sudden changes. Accordingly, it would be necessary for the security police to establish through readiness for swiftly responding to sudden changes in North Korea such as massive defections such as reinforcing organizational and personnel capabilities and develop specific scenarios of response centering on the three types of measures of responses mentioned above.

건축 프로젝트 적정 설계변경 관리를 위한 사례조사

김성욱(Kim Sung-Wook),남혜원(Nam Hye-Won),이종식(Lee Jong-Sik),신창현(Shin Chang-Hyun),전재열(Chun Jae-Youl) 대한건축학회 2009 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.29 No.1(구조계)

Recent design changes in the existing research on the factors and issues of design changes and analysis, responsible for analyzing the relationship, procedural issues, and issues of research that can be active. However, changes in the design of problems are essentially designed to complement the book is for the procedure. Methodology for dealing with design changes in the characteristics of the country and to reflect more realistically, and various design changes and looked at trends in related research. the design Change of this study to examine the domestic status and problems, identify the status of the country about the design changes, and in suggesting the direction to the development of the design changes.

펠던크라이스 기법, 탄성밴드 운동 및 복합운동 적용이 현대무용전공자의 체간근력에 미치는 영향

김채수(Kim Chae-Soo),권혜영(Kwon Hye-Young),이원재(Lee Won-Jae),조창모(Jo Chang-Mo),김진환(Kim Jin-Hwan),주성범(Ju Sung-Bum),이미경(Lee Mi-Kyoung) 한국체육과학회 2011 한국체육과학회지 Vol.20 No.1

This study is carried out to examine the effect of applying Feldenkrais method, elastic band training and combined training on trunk muscle. The subjects of this study were 32 modern dance majors and they were divided into four groups which consists of 8 peoples each, Feldenkrais method group(modern dance + Feldenkrais method), elastic band training group(modern dance + elastic band training), combined training group(modern dance + Feldenkrais method + elastic band training), and control group(modern dance). Measurement variables which are trunk muscle were measured before training, and after 4 and 8 weeks training and the results are as follow: In the left muscle strength change at Centaur 0°, Feldenkrais method group, elastic band training group and combined training group showed significant increase after 8 weeks training compared to before training. In the right muscle strength change, Feldenkrais method group and combined training group had significant increase after 8 weeks training. In the left muscle strength change at Centaur 45°, Feldenkrais method group and combined training group showed significant increase after 8 weeks training compared to before training and after 4 weeks training. Also elastic band training group showed significant increase after 8 weeks training compared to before training. In the right muscle strength change, Feldenkrais method group and elastic band training group significantly increased after 8 weeks training compared to before training. In the left muscle strength change at Centaur 90°, Feldenkrais method group and combined training group showed significant increase after 4 and 8 weeks training compared to before training. In the right muscle strength change, Feldenkrais method group showed significant increase after 4 and 8 weeks training compared to before training, and elastic band training group significantly increased after 8weeks training compared to before training. In the left muscle strength change at Centaur 135°, there was no significant changes. In the right muscle strength change, elastic band training group and combined training group showed significant increase after 8 weeks training compared to before training. In the left muscle strength change at Centaur 180°, combined training group showed significant increase after 4 and 8 weeks training compared to before training. In the right muscle strength change, combined training group showed significant increase after 4 and 8 weeks training compared to before training. From above results, applying 8 weeks regular program of Feldenkrais method, elastic band training and combined training to modern dance majors showed positive changes on improvement of trunk muscle strength and physical strength. Also this study implemented to verify the effects of trunk muscle strength and body balance through supplementary training program, and showed the effects in the training group and control group after 8 weeks trunk muscle strengthening program. Feldenkrais method, elastic band training and combined training are very effective to improve trunk muscle strength of modern dance majors so that continuous implementation and application of these effective training program shall be provided for strengthening trunk muscle.

Helicobacter pylori 감염진단을 위한 Asan Helicobacter 검사의 평가

이종욱,김범수,이경원,이재학,이재경,이창훈 대한임상미샐물학회 2003 Annals of clinical microbiology Vol.6 No.2

Ganglioside GM1 influences the proliferation rate of mouse induced pluripotent stem cells

( Jae-sung Ryu ),( Kyu-tae Chang ),( Ju-taek Lee ),( Malg-um Lim ),( Hyun-ki Min ),( Yoon-ju Na ),( Su-bin Lee ),( Gislain Moussavou ),( Sun-uk Kim ),( Ji-su Kim ),( Kinarm Ko ),( Kisung Ko ),( Kyung- 생화학분자생물학회(구 한국생화학분자생물학회) 2017 BMB Reports Vol.50 No.6

The ACKNOWLEDGEMENTS should be corrected as follows, "This research was supported by a grant (Code# PJ0074922012) from the Korean Rural Development Administration, and has been supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education Science and Technology (2010-0022316 and KCG5401011), and the KRIBB/KRCF Research Initiative Program (NAP), Korea. The published article in this journal was a part of the 2013 Doctoral thesis of Jae-Sung Ryu submitted to Wonkwang University, Korea." and not "This research was supported by a grant (Code# PJ0074922012) from the Korean Rural Development Administration, and has been supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education Science and Technology (2010-0022316 and KCG5401011), and the KRIBB/KRCF Research Initiative Program (NAP), Korea."

비정질 합금이 나타내는 소성의 원천

이석우,이창면,채수원,김유찬,이재철 대한금속재료학회 2005 대한금속·재료학회지 Vol.43 No.5

Various Cu-Zr bearing monolithic amorphous alloys, exhibiting different stress-strain behaviors, were prepared to investigate the nature of the plasticity shown by theses alloys. Microscopic observation of the quasi-statically compressed Cu_(50)Zr_(43)A1_(7) specimen revealed abundant precipitation of nanocrystallites, while insignificant changes in the microstructure were observed from the Cu_(64)Zr_(36) alloy. Finite element analysis was conducted in order to better understand the role of nanocrystallites in an amorphous matrix on the plasticity of the amorphous alloy. The activation energies for crystallization of the amorphous alloys were measured and correlated with the plasticity of the amorphous alloys. Herein, we report for the first time that the origin of the plasticity of monolithic amorphous alloys lies in the activation energy for crystallization. (Received February 14, 2005)

Operation Range‑Optimized Silver Nanowire Through Junction Treatment

Jae‑Chan Lee,Jong‑Sung Lee,Phillip Won,Jung Jae Park,Seok Hwan Choi,Seung Hwan Ko,Byoung‑Joon Kim,이소연,Young‑Chang Joo 대한금속·재료학회 2020 ELECTRONIC MATERIALS LETTERS Vol.16 No.5

In past decades, stretchable conductors have been investigated for a wide range of applications, and the operation strain rangeof such devices varies by application. To commercialize stretchable devices, it is necessary to optimize the deformation ofstretchable electrodes based on a given device elongation range. Therefore, we investigated the deformation mechanics ofa silver nanowire (AgNW) electrode on an elastomeric substrate depending on its junction treatment method. At low-strain(< 15%), a thermally annealed AgNW electrode showed more stable resistance than a laser-welded AgNW electrode. Conversely,at high strain (> 20%), the thermally annealed AgNW electrode rapidly increased in resistance, while the laser-weldedAgNW electrode showed lower resistivity change. By in situ surface analysis and a repetitive tensile test, we observed thatthe thermally annealed AgNW electrode shows less cracking at low strain but the laser-welded AgNW electrode exhibitsfracturing of individual nanowires at low strain. Furthermore, at high strain, laser-welded AgNWs could slide to reducestress during elongation, resulting in a smaller change in resistance compared to that of thermally annealed AgNW electrode. These results indicate that optimization of adhesion is necessary to fabricate stretchable devices based on deformation range.

감속기 기어의 결함진단에 관한 연구

이재현,국재창,이재응 중앙대학교 기술과학연구소 1999 기술과학연구소 논문집 Vol.29 No.-

본 논문에서는 감속기 기어의 결함진단의 문제가 고려되었고, 시간-주파수 영역의 분석 방법인 위이블렛 변환을 결함진단 연구에 이용하였다. 웨이블렛 변환은 시간-주파수 영역에서 좋은 성능을 나타내며 다양한 기본 웨이블렛 함수를 가지고 있고 융통성과 적응력이 있는 변환방법과 해상도를 가지고 있어서, 급격히 변화하는 신호나 비정상 충격신호를 위치신호의 손실없이 잘 분석할 수 있는데, 이는 기어면에서 금속충돌이 일어나고 여거 기어이를 가지고 있는 복잡한 기어 시스템에서 더욱 유용하게 쓰일 수 있다. 또한 웨이블렛이 가진 주요 특성 중 하나인 잡음제거(de-noise) 기능을 사용하여 잡음이 합쳐져 있는 실제 신호를 더욱 효과적으로 분석 할 수 있었다. 실험대상은 두 쌍의 기어 물림이 있는 기어구동계를 사용하였고, 먼저 실험대상인 기어열에서 이론적으로 발생할 수 있는 싸인파들의 합성으로 이루어진 신호를 가지고 시뮬레이션을 실시하였고, 실험장치를 통해 정상상태기어에서의 신호와 기어에 인위적으로 발생시틴 결함에 의해 발생되는 신호를 측정하였으며 이러한 신호를 웨이블렛 변환하는 방법을 통해 결함을 분석하였다. In this paper, the problems of the fault detection of gear trains are considered, and the wavelet transforms are applied to evaluate the performance of detecting the incipient gear damage with real experimental data. The wavelet transform enables one to look at the evolution in time of a signal's frequency content. This property make it very suitable for the detection of transient vibrations generated by developing localized faults in gear trains. Recent applications of the wavelet technique have focused on the use of DWT(Descret Wavelet Transform) coefficients only. In this study, the wavelet denosing is also applied to remove the effect of the noise in the measured vibration signals. The denoised wavelet map is found to display distinctive features in the presence of several kinds of fault in a tooth.