긴밀도 변화 탐지 기법을 사용한 화산 분화에 의한 지표 변화 분석 - 2024년 5월 아이슬란드 화산 분화를 중심으로

김봉찬 ( Bong Chan Kim ),이슬기 ( Seulki Lee ),이광재 ( Kwang-jae Lee ),이승재 ( Seung-jae Lee ),채성호 ( Sung-ho Chae ),이창욱 ( Chang-wook Lee ) 대한원격탐사학회 2024 대한원격탐사학회지 Vol.40 No.6

아이슬란드 레이캬네스(Reykjanes) 반도의 순드누쿠르(Sundhnukur) 화산은 2024년 5월 29일 분화를 시작하며 대량의 용암을 분출하여 용암 대지를 형성하고 지표 변화를 초래하였다. 본 연구에서는 Sentinel-1 위성 영상에 긴밀도 변화 탐지(Coherence Change Detection, CCD) 기법을 적용해 초기 화산 분화에 의한 지표 변화를 관측하였다. Landsat-9 위성 영상에 서포트 벡터 머신(Support Vector Machine, SVM) 기법을 적용하여 CCD 기법의 임계값을 산출하였고, 이를 기반으로 damage proxy map과 변화 지역 자료를 생성하여 화산 분화로 인한 변화 지역을 평가하였다. CCD 기법과 SVM 알고리즘을 복합적으로 사용해 분석한 결과, 화산 분화의 초기 기간동안 7,536,000 ㎡의 용암 대지가 형성된 것으로 확인되었으며 이는 실측 결과와 약 18%의 오차를 보였다. 또한, 화산 분화로 인해 9,698,500 ㎡에 달하는 영역에서 지표 변화가 발생한 것으로 나타났다. 본 연구에서는 CCD 기법을 통해 광학 위성 영상으로 탐지하기 어려운 지표 변화를 효과적으로 탐지할 수 있음을 확인하였다. 이러한 접근은 화산 분화 초기 지표 변화의 특성을 파악하는 데 기여하며 향후 KOMPSAT-6 위성이 운용될 경우, 지표 변화 탐지와 모니터링을 위한 기초 자료로 활용될 수 있을 것으로 기대된다. Sundhnukur volcano on the Reykjanes Peninsula, Iceland, erupted on May 29, 2024, spewing a large amount of lava, forming a volcanic plateau and causing surface changes. In this study, the Coherence Change Detection (CCD) technique was applied to Sentinel-1 satellite images to observe surface changes caused by the initial volcanic eruption. The Support Vector Machine (SVM) algorithm was applied to Landsat-9 satellite images to derive the threshold for the CCD technique, and based on this, a damage proxy map and change area data were generated to evaluate the area changed by the volcanic eruption. The combined analysis using the CCD technique and the SVM algorithm showed that 7,536,000 ㎡ of volcanic plateau was formed during the initial period of the volcanic eruption, which showed an error of approximately 18% from the actual measurement result. In addition, it was found that the volcanic eruption caused surface changes in an area of 9,698,500 ㎡. In this study, it was confirmed that the CCD technique can effectively detect surface changes that are difficult to detect with optical satellite images. This approach will contribute to identifying the characteristics of surface changes in the early stages of volcanic eruptions, and it is expected that it can be used as basic data for surface change detection and monitoring when the KOMPSAT-6 satellite is operated in the future.

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)

기후변화에 따른 보건 분야의 취약성 평가

이재범(Jae-Bum Lee),이현주(Hyun-Ju Lee),문경정(Kyung Jung Moon),홍성철(Sung-Chul Hong),김덕래(Deok-Rae Kim),송창근(Chang-Keun Song),홍유덕(You-Deog Hong) 한국대기환경학회 2012 한국대기환경학회지 Vol.28 No.1

Adaptation of climate change is necessary to avoid unexpected impacts of climate change caused by human activities. Vulnerability refers to the degree to which system cannot cope with impacts of climate change, encompassing physical, social and economic aspects. Therefore the quantification of climate change impacts and its vulnerability is needed to identify vulnerable regions and to setup the proper strategies for adaptation. In this study, climate change vulnerability is defined as a function of climate exposure, sensitivity, and adaptive capacity. Also, we identified regions vulnerable to ozone due to climate change in Korea using developed proxy variables of vulnerability of regional level. 18 proxy variables are selected through delphi survey to assess vulnerability over human health sector for ozone concentration change due to climate change. Also, we estimate the weighting score of proxy variables from delphi survey. The results showed that the local regions with higher vulnerability index in the sector of human health are Seoul and Daegu, whereas regions with lower one are Jeollanam-do, Gyeonggi-do, Gwangju, Busan, Daejeon, and Gangwon-do. The regions of high level vulnerability are mainly caused by their high ozone exposure. We also assessed future vulnerability according to the Intergovernmental Panel on Climate Change (IPCC) Special Report on Emissions Scenarios (SRES) A2, A1FI, A1T, A1B, B2, and B1 scenarios in 2020s, 2050s and 2100s. The results showed that vulnerability increased in all scenarios due to increased ozone concentrations. Especially vulnerability index is increased by approximately 2 times in A1FI scenarios in the 2020s. This study could support regionally adjusted adaptation polices and the quantitative background of policy priority as providing the information on the regional vulnerability of ozone due to climate change in Korea.

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.

비호지킨림프종 환자에서 발생한 폐 효모균증 1예

장재혁,송치원,심병용,이동건,변재호,정정임,이교영,홍영선,신완식,김춘추,이경식 대한감염학회 2003 감염과 화학요법 Vol.35 No.3

저자들은 비호지킨씨 림프종 환자에서 항암 치료 후 질환의 진행성 병변과 감별을 요했던 우폐 중엽의 단발성 종괴를 흉강경하 생검으로 폐 효모균증을 확진하고 amphotericin B와 fluconazole로 치료한 1례를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Non-Hodgkin's lymphoma is monoclonal expansion of malignant B or T cells. The immunocompromised status in this disease is accompanied by many infections. The cryptococcosis, caused by Cryptococcus neoformans, frequently occurs in leukemia, Hodgkin's disease, sarcoidosis, diabetes mellitus, tuberculosis, and long-term steroid-using patients. Recent increasing incidence of fungal infection could be due to the spread of AIDS and transplantation. We experienced one patient with lung mass in Non-Hodgkin's lymphoma after three cycles of chemotherapy, which could not be discriminated from the newly developed lymphoma mass. Cryptococcus neoformans was isolated from the lung tissue obtained by thoracoscopic biopsy. Herein we report this case with brief review of pertinent literature.

견비통의 한·양방 진료 및 협진의 경제성 평가

장혜정,홍상민,박유선,남동우,이두익,이재동,이윤호,임사비나 WHO COLLABORATING CENTRE FOR TRADITIONAL MEDICINE 2007 東西醫學硏究所 論文集 Vol.2007 No.-

Objectives : The purpose of this study was to evaluate and compare the cost-effectiveness of Eastern, Western and collaborative treatments and suggest a cost-effective approach for patients with frozen shoulder pain. Methods : Using the data of fifty-two patients, treatment effectiveness was measured by CSA, SPADI, and ROM scales and changes from the baseline score were evaluated. Data source for cost estimation was based on the national health insurance (NHI) payment system. Because the price in NHI was differentiated by health care institutions, five collaborative types were considered in assessing costs. Cost-effective ratios were computed tor economic evaluation. Results : Compared with Eastem treatinent, collaborative and Westerm treatments showed better effects on CSA scale after 4 weeks' treatment. The collaborative approach was also the most effective treatment on SPADI and ROM scales The direct cost per patient receiving Eastern treatment was less than other treatments. In general, collaborative treatment dominated Eastern and Western treatments in cost-effectiveness analysis However, the cost-effectiveness ratio of Eastern treatment resulted in \9,0OO compared to W29,OOO of collaborative treatment on SPADI Four different indicators of ROM scales resulted in different approaches as the cost-effective treatment. Conclusiuns : Considering cost-effectiveness ratios, collaborative treatment was the best treatment on CSA and SPADl scales after 4 weeks' treatment As for ROM scales, the recommended altematives were Eastern treatment for patients with abduction and adduction disabilities, Western treatment for those with flexion disability, and collab-orative approach for those with extension disability.

미립잠열재를 활용한 축열조로부터 방열특성연구

이효진,홍재창 한밭대학교 산업과학기술연구소 2001 논문집 Vol.5 No.-

An experimental study has conducted to understand the characteristics of heat releasing system in which Micro-PCM(microencapsulated Phase Change Materials) slurry is adopted for its storage media mixed with distilled water. Tetradecane(C_14H_30, T_m=5.5℃) as a core, is encapsulated and covered with melamin. For the test, a storage tank, which is 10 ㎝ in diameter and 20 ㎝ of its length, is fabricated with bakelite insulated with glass fiber, 2 ㎝ thick, to protect its heat loss. In order to measure the temperature changes during the heat releasing, 9 T-type thermocouples are embedded at three places in the axial direction and three at radial direction. The size of particles is well-controlled under 10 ㎛ in the way of in-situ polymerization with melamine-formaldehyde resin. For the experiment, the concentrations of slurries are prepared for 20 wt%, 30 wt%, and 40 wt%. The results are compared with those of water and 100% tetradecane oil. MicroPCM slurries are required relatively longer period of time for their phase change than pure phase change materials. That is, the entrained MicroPCM particles control its heat transfer in terms of natural convection and conduction to them.