진피하 기저세포암

최성우,양정은,장인강,김형옥,조성필 ( Sung Woo Choi,Jeung Eun Yang,In Gang Jang,Hyung Ok Kim,Seong Pil Joh ) 대한피부과학회 1997 대한피부과학회지 Vol.35 No.5

Basal cell carcinomas usually arise from the epidermis and show some epidermal connections. It is very unusual that basal celi carcinomas occur as subderrnal mass without epidermal connections. A 51 year-old female h;d an asymptomatic skin colored indurated plaque with linear old scar on the left side of nose fcr about 20 years. She had had a tumor that supposed to be a epidermal cyst, on the same site and the lesion was excised about 20 years ago. We performed the punch biopsy on her first visit which revealed hypertrophic scar. She was treated with intralesional injection of triamcinolone acetonide to reduce the size of hypertrophic scar. However, the lesion had not been reduced. She underwent the surgery to remove the scar at plastic surgery and the excisional biopsy showed a subdermal basal cell carcinoma. We recommend that the newly developed skin tumor in the pre-excised region should be required excisional biopsy instead of punch and close observation (KOfean J Dermatol 1997;35(5): 1036-1039)

성인에서 발생한 단발성 근섬유종

최성우,박종갑,김태윤,김형옥,김정원,강석진 ( Sung Woo Choi,Jong Gap Park,Tae Yoon Kim,Hyung Ok Kim,Chung Won Kim,Seok Jin Kang ) 대한피부과학회 1997 대한피부과학회지 Vol.35 No.5

Myofibroma and myofibromaiosis are uncommon, benign, mostly self-limiting, probably hamartomatous proliferation of myofibroblasts. These tumors are most often present at birth or before the age of 2 years with multiple ot solitary lesion. Adult cases are rare and most,ly showed as a solitary lesion. We present a case of solitary myofibroma that developed on the vertex of scalp in a 51-year-old man. The lesion was a mild tender and intermittent pruritic firm, pedunclated 1 1cm sized tumor. The iumor was diagnosed as myofibroma by light microscopy and immunohistochemistry. (Korean J Dermatol 1907;35(5): 1031-1035)

한국판 국제 소아천식 및 알레르기 질환 연구 설문지의 신뢰도 및 타당도 연구

최성우,주영수,김대성,김재용,권호장,강대희,이상일,조수헌,Choi, Seong-Woo,Ju, Yeong-Su,Kim, Dae-Sung,Kim, Jae-Yong,Kwon, Ho-Jang,Kang, Dae-Hee,Lee, Sang-Il,Cho, Soo-Hun 대한예방의학회 1998 예방의학회지 Vol.31 No.3

Recent increases of asthma and allergies in childhood made the need for a standardized approach to international and regional comparisons of their prevalence and severity. To address these issues, 'International Study of Asthma and Allergies in Childhood (ISAAC)' is currently underway. In Korea, 'Nationwide Study of Asthma and Allergies in Korean Children' began in 1995 according to ISAAC protocol. ISAAC written and video questionnaires were used in this survey, but their reliability and validity were not evaluated properly yet. In this study, our aim was to evaluate the reliability and validity of two kinds of questionnaires and their usefulness in international and regional comparisons. The test and retest of two questionniares were completed by male(n=110) and female(n=111) middle school students with two and three weeks interval each. Kappa(or weighted kappa) were calculated from each questions and validity coefficients were estimated from those statistics. In Korean version of written questionnaire, the questions for allergic rhinitis, atopic dermatitis, allergic conjunctivitis, and food allergy proved to have high kappa values (or weighted kappa values) and validity coefficients and they can be used in further studies without any correction. But some questions about asthma(especially nocturnal cough, wheezing in exercise, and severe asthma) and drug allergy need to be revised for better under-standing to study subjects. Video questionnaire has the same degree of reliability and validity when compared to written questionnaire and this is the unexpected result. Accordingly, it also need to be revised to overcome the racial and cultural differences of the study subjects. In conclusion, the Korean version of written and video questionnaires may be considered to be useful methods in international and regional comparisons of asthma and allergic diseases in childhood after correction of some questions.

HomePNA 2.0 모뎀 수신부 설계

최성우,김종원,Choi, Sung-Woo,Kim, Jong-Won 한국통신학회 2004 韓國通信學會論文誌 Vol.29 No.9A

본 논문은 HomePNA 2.0 모뎀 칩을 위한 모뎀 수신부의 구조를 제안한다. HomePNA 2.0 전송 채널은 브릿지 탭과 HAM 대역의 영향 등으로 매우 열악하다. 이러한 채널을 통해 전송을 가능하게 하기 위해 HomePNA 2.0 은 훈련신호를 사용하여 매 프레임 마다 채널을 등화하고 FD-QAM 전송 방식을 선택적으로 사용한다. 따라서 모뎀 수신부는 일반적 QAM 방식 신호의 북조 기능과 함께 이러한 전송 방식의 특정을 최대한 상려 모뎀 수신 성 능을 극대화 히는 구조가 필요하다 연구 결과 모뎀 수신부의 가능을 송수신 상태에 따라 정상 수신 모드와 충돌 감지 오드의 2 가지로 정의 하였다 본 논문은 특히, 모뎀 수신부를 구성하는 핵심 블록인 등화기와 위상 동기부, 프레임 동기부에 대해서 사용된 알고리즘을 밝혔으며, 버스트 방식 모뎀의 채널 등화 성능을 높이고 안정적으로 동작 시키기 위한 구조를 제얀 하였다 마지막으로 제안된 모뎀 수신부의 성능을 분석하기 위해서 SPW 모델을 사용하여 채널 별 전송 가능 속도를 예측 하였다. In this paper, we propose the architecture of modem receiver to fabricate HomePNA 2.0 chip. HomePNA suffers from inferior channel because of bridge tap, the effect of amateur HAM band and so on. To transfer data over such channel, HomePNA 2.0 uses training sequence to equalize channel and uses FD-QAM optionally as modulation method. So modem receiver demodulate QAM based signal and needs optimum architecture that fully uses these transmission feature. As a result of research, we define 2 mode function of modem receiver depending on TX/RX state. In this paper, particularly, we show the algorithm of equalizer, carrier phase recovery and frame synchromzationblock and propose architecture that improve the performance of channel equalization and is stable in operation. In the end, we estimate the performance of proposed HomePNA2.0 modem receiver over HomePNA TEST LOOP using SPW program.

전라남도 거주 여성 중 사별군과 비사별군간의 건강행태 비교

최성우,이정애,신준호,신민호,Choi, Seong-Woo,Rhee, Jung-Ae,Shin, Jun-Ho,Shin, Min-Ho 대한예방의학회 2008 예방의학회지 Vol.41 No.4

Objectives: To compare the health behaviors of widowed women with those of currently married women. Methods: We randomly sampled the subjects from the Jeollanamdo Resident Registration Data and we then selected 2,331 widowed women and 4,775 married women. Well-trained examiners measured the height, weight, blood pressure and abdomen circumference, and the women were interviewed with using a questionnaire. Logistic regression analysis was used to estimate the odds ratios(OR) of the two groups. Results: The smoking rate (OR=2.46; 95% confidence interval [CI]1.65, 3.66) was significantly higher for the widowed women. On the contrary, the awareness rate of a smoking cessation campaign (OR=0.80; 95% CI=0.70, 0.92), a quit tobacco telephone line (OR=0.73; 95% CI =0.61, 0.88) and a quit smoking clinic (OR=0.74; 95% CI=0.62, 0.89) were lower for the widowed women. The rate of receiving a health exam (OR=0.80; 95% CI=0.70, 0.91), the rate of undergoing gastric cancer screening (OR=0.77; 95% CI=0.68, 0.88), breast cancer screening (OR=0.79; 95% CI=0.69, 0.89), cervix cancer screening in the last 2 years (OR=0.81; 95% CI=0.71, 0.92), colon cancer screening in the last 5 years (OR=0.74; 95% CI=0.63, 0.87) were significantly lower for the widowed women. Conclusions: This study revealed that the health behaviors are significantly different between the widowed women and the married women. To improve the health behaviors of the widowed women, further study and research that will investigate the socioeconomic and environmental factors that affect the health behaviors of widowed women will be needed.

콘크리트용 골재로써 철강산업 부산물의 활용

최성우,김영선,류득현,조봉석,Choi, Sung-Woo,Kim, Young-Sun,Ryu, Deug-Hyun,Cho, Bong-Suk 한국건설순환자원학회 2019 한국건설순환자원학회지 Vol.14 No.2

비정질 강섬유를 사용한 ECC의 유동성 및 강도 특성

최성우(Choi, Sumg Woo),김정식(Kim, Jung Shik),류득현(Ryu, Deug Hyun),최광호(Choi, Kwang Ho),최세진(Choi, Sea Jin) 한국콘크리트학회 2015 한국콘크리트학회 학술대회 논문집 Vol.2015 No.5

리액트 기반 협업 지원 도구 통합 서비스

최성우(SungWoo Choi),김현우(HyunWoo Kim),이유정(YuJeong Lee),이하얀(HaYan Lee),류덕산(DukSan Ryu),유철중(CheolJung Yoo) 한국정보기술학회 2022 Proceedings of KIIT Conference Vol.2022 No.6

소프트웨어 개발 중 설계 및 구현 단계에서 개발자들은 목적에 따라 각기 다른 기능을 지원하는 복수의 협업 도구들을 사용한다. 하지만 여러 협업 도구들을 동시에 사용하기 위해서는 각 도구의 창을 일일이 접속해야 하는 번거로움이 발생한다. 본 논문에서는 리액트 프레임워크 next.js를 사용하여 협업 도구들을 통합함으로써 각 협업 도구들의 기능을 사용할 수 있는 협업 지원 도구 통합 서비스를 제안한다. 제안한 서비스에서는 일정 관리를 위해 프로젝트 단위의 캘린더 기능이 포함되며 여러 협업 도구들의 도움말과 사용법이 제공된다. 이를 바탕으로 단일 도구의 서비스 접근에 소요되는 시간의 비교와 일정 관리 서비스를 통합 도구와 단일 도구 사이에 비교하는 실험을 진행했다. 실험을 통해 통합 도구의 서비스 접근 시간이 더 빠름을 알 수 있었고 더 나은 일정 관리 서비스를 제공함을 알 수 있었다. 해당 서비스는 개발자 또는 일반 협업 참여자도 사용하기에 부담이 적은 서비스로, 협업 프로젝트를 더 빠르고 효율적으로 수행할 수 있도록 도울 것이다. During the design and implementation stage of software development, developers use multiple collaborative tools that support different functions depending on the purpose. However, in order to use multiple collaborative tools at the same time, it is cumbersome to connect the windows of each tool one by one. In this paper, we propose a collaborative support tool integration service that allows us to use the functions of each collaborative tool by integrating collaborative tools using the react framework next.js. The proposed service includes a project-level calendar function for schedule management and provides help and usage of several collaborative tools. Based on this, an experiment was conducted to compare the time required to access the service of a single tool and to compare the schedule management service between the integrated tool and the single tool. Through experiments, it was found that the service access time of the integrated tool was faster and that it provided better schedule management services. This service is less burdensome for developers or general collaboration participants to use, and will help them carry out collaboration projects faster and more efficiently.

Ti-Ni-Hf 고온형상기억합금의 미세조직 및 고온특성에 미치는 합금 조성의 영향

최성우 ( Seong Woo Choi ),이학성 ( Hak Sung Lee ),전영민 ( Yeong Min Jeon ),남태현 ( Tae Hyun Nam ),염종택 ( Jong Taek Yeom ),김성웅 ( Seong Woong Kim ),박찬희 ( Chan Hee Park ),홍재근 ( Jae Keun Hong ),오창석 ( Chang Seok Oh ) 대한금속재료학회(구 대한금속학회) 2015 대한금속·재료학회지 Vol.53 No.3

The effect of Ni and Hf content on the microstructure, phase transformation, and hot workability of Ti-Ni-Hf high-temperature shape memory alloys (SMAs) were investigated. Twelve different Ti-xNi (x=49, 50.2, 50.5, 50.8 at%)-yHf (y=10, 12, 14 at%) SMA ingots were prepared by vacuum arc re-melting, and then analyzed by SEM, DSC, TEM, and XRD after heat treatment. Precipitation behavior was mostly dependent on Ni content rather than Hf content. The effect of homogenization treatment on the particle precipitation and phase transformation behavior was studied. We also found that hot workability was greatly dependent on the solidification structure of the austenite phase. (Received March 2, 2014)

빅데이터 기술 및 분석 기법의 연구 동향

최성우(Sung-Woo Choi),김호영(Ho-Young Kim),김영국(Young-Kuk Kim) 한국정보과학회 2012 한국정보과학회 학술발표논문집 Vol.39 No.2A