코로나19 유행 동안 고혈압ㆍ당뇨병 유병 여부에 따른 소득수준별 일상신체활동 변화: 2020년 지역사회건강조사를 이용하여

윤민선,정현숙,배보영,홍나영,임현우 한국보건교육건강증진학회 2022 보건교육건강증진학회지 Vol.39 No.2

Objectives: This study aimed to examine the changes in daily physical activities during the COVID-19 epidemic compared to before COVID-19 according to the prevalence of hypertension and diabetes. Furthermore, it also investigated whether a difference in the decrease in daily physical activity occurred according to economic level. Methods: The participants included 64,840 people in the hypertensive/diabetic group and 96,092 people in the non-hypertensive/-diabetic group using the 2020 Community Health Survey data. A multivariable logistic regression analysis was used to calculate the adjusted odds ratios for the decrease in daily physical activities during the COVID-19 epidemic between the two groups. Household income was stratified into quartiles to determine the association according to economic level. Results: During COVID-19, the decrease rate of daily physical activities in the hypertensive/diabetic group was 46.1%, which was significantly lower than that in the non-hypertensive/-diabetic group (51.5%) (aOR, 95% CI: 0.961, 0.934-0.989). However, in the lowest income group (1st quartile), the decrease in daily physical activities was higher in the hypertension/diabetes group (aOR, 95% CI: 1.114, 1.051-1.181). Conclusion: Strategies are needed to maintain and increase physical activities among hypertensive or diabetic patients in low-income groups during the COVID-19 pandemic. .

손바닥 선인장 (Opuntia humifusa) 줄기 추출물의 생리활성

윤민선 ( Min Sun Yoon ),유재수 ( Jae Soo Yoo ),이근광 ( Keun Kwang Lee ),김명곤 ( Myung Kon Kim ) 한국응용생명화학회(구 한국농화학회) 2012 Journal of Applied Biological Chemistry (J. Appl. Vol.55 No.2

Biological activities of the hot water and ethanol extracts from Opuntia humifusa cladodes were investigated. 1,1- diphenyl-2-picryl hadrazyl (DPPH) electron donating ability hot water and ethanol extracts was 79.07 and 82.54%, respectively. Hot water extract generally showed better cytotoxic activity than ethanol extract against each cell line. HeLa and AGS cell lines treated with hot water extract had more than 50% cytotoxic activities. Based on the antimicrobial activities against four microbial strains, both extracts inhibited growth of Staphylococcus aureus KCCM 11593, whereas affected cell growth of three other microorganisms, Escherichia coli (KCCM 11234), Pseudomonas aeruginosa (ATCC 27853), and Salmonella typhimurium (ATCC 11862), in proportion to the concentration of extracts. The inflammatory activities against hot water extract (34.31%) showed higher than that of ethanol extract (25.59%). The effect of extracts on 3T3-L1 preadipocytes differentiation showed that differentiation of treated group with 80 and 100 μg/mL of hot and ethanol extracts were increased more than treated group with isobutyl methyl xanthine (IBMX) + dexamethasone. These results indicate that the O. humifusa cladodes extracts can be used as a functional material due to their effective biological activities.

설비비용을 고려한 제약자원 결정방법

홍민선(Min-Sun Hong),윤철주(Chul-Ju Yun),민병도(Byong-Do Min),임석철(Suk-Chul Rim) 대한산업공학회 2004 대한산업공학회 춘계학술대회논문집 Vol.2004 No.2

신체형 장애 환자의 강박적 이물주사로 인한 거대안면: 증례보고

권봉식,윤진호,강소라,조민선 대한성형외과학회 2003 Archives of Plastic Surgery Vol.30 No.5

Body dysmorphic disorders can be often diagnosed among the group of patients seeking plastic surgery with excessiveness. For the correction of unrealistic body images tied up in their minds, they have a tendency to choose improper plastic operation or unlicensed procedures rather than the psychiatric intervention. So- called 'illegal injection' performed by the unlicensed has been readily accessible tempting alternatives, which could result in disastrous outcomes due to multiple compulsive injections. Nowadays injection of foreign materials, such as paraffin oil or liquid silicon, is thought to be obsolete in modern medical procedures. Nevertheless, these illegal procedures have been in extensive use among some Asian countries, including Korea, by the unlicensed. Local complication, particularly, granulomatous inflammatory responses of variable severity can occur, despite skillful techniques and even small amount of injection. Futhermore, these lesions frequently persist or recur after treatment.We have a case of a body dysmorphic disorder manifesting severe, huge foreign body granulomas caused by silicon, paraffin and oil injected. Our case was a 38- years-old woman who had multiple huge masses on head and neck which had slowly grown after multiple injections for about 16 years. After a psychiatric intervention, we performed partial resection of masses in cheek and neck area, followed by liposuction of forehead, neck and scalp. A brief history of case and the clinical significance of foreign body injection in body dysmorphic disorder were described.

서울시 오피스건물의 자본환원율 결정요인

손재영,윤민선 대한국토·도시계획학회 2007 國土計劃 Vol.42 No.2

Capitalization rate (cap rate) is used not only as a rule-of-thumb measure of investment merits but also as part of sophisticated discounted cash flow analyses in the context of real estate appraisal, and investment and financial analyses. It has increasingly gained aprofessionals since the 1997 currency crisis and market opening. Nonetheless, the meaning of the measure, its proper usage, and its determinants have not been studied for lack of data and theoretical understanding. This paper intends to fill the gap by presenting the theoretical structure behind the cap rate, and by identifying determinants of the measure in Seoul owas collected for period between 2000 and 2006, and regression models were run with independent variables based on theoretical discussions. Our data indicates that the cap rate for Seoul office market has declined from around 10% to 6% over the 6-year period. The regressions results show that macroeconomic factors and investment purpose variables, rather determinants of the cap rate. Especially, interest rate and inflation rate have positive effects on the cap rate.

이중대역 송신 시스템을 위한 단일 피드백 디지털 전치왜곡 기법

이광표,윤민선,정배묵,정의림,Lee, Kwang-Pyo,Yun, Min-Seon,Jeong, Bae-mook,Jeong, Eui-Rim 한국정보통신학회 2017 한국정보통신학회논문지 Vol.21 No.3

본 논문에서는 이중 대역 송신시스템에서 비선형 전력증폭기를 선형화하기 위한 새로운 디지털 전치왜곡 기법을 제안한다. 기존의 시스템에서는 자기 대역의 비선형뿐만 아니라 타 대역간의 비선형을 보상하기 위해 두 개의 피드백 경로가 요구되는데 이는 하드웨어의 복잡도와 비용을 증가시킨다. 반면 제안하는 전치왜곡 시스템은 한 개의 피드백 경로만을 사용한다. 따라서 기존 시스템에 비해 훨씬 간단한 구조를 가진다. 제안하는 기법은 전치왜곡 계수를 얻기 위해서 한 개의 피드백 경로를 공유하여 두 대역의 전력증폭기 특성을 먼저 추정하고 추정된 전력증폭기 특성으로부터 전치왜곡 계수를 얻는다. 컴퓨터 모의실험 결과에 따르면 제안된 방식은 두 개의 피드백 회로를 구성한 기존 방식과 대등한 선형화 성능을 보인다. A new digital pre-distortion technique to linearize power amplifier (PA) is proposed for concurrent dual-band transmitters. In the conventional dual-band DPD techniques, two independent dual-feedback paths are required to compensate nonlinear cross-products between different bands as well as the nonlinear self-products of each band's own signal. However, it increases hardware complexity and expense. In this paper, we propose a new DPD method requiring only a single feedback path. In this new structure, the proposed technique first estimates the dual-band PA characteristics using the single feedback path. The DPD parameters are then extracted from the estimated PA characteristics. The DPD performance of the proposed method is validated through computer simulation. According to the results, the proposed technique can achieve comparable performance to the conventional two feedback DPD with significantly reduced hardware complexity.

Ruddlesden-Popper oxide with in situ grown CoNi alloy nanoparticles as a solid oxide electrolysis cell cathode catalyst for CO₂ electrolysis

박성민,윤원근,이승준,최준일,박민선,한정현,강송규,김원배 한국에너지학회 2021 한국에너지공학회 학술발표회 Vol.2021 No.4

SF6 추적자 실험을 통한 대기오염 확산 모델의 검증 및 평가 ( The evaluation of air pollutant dispersion model with SF6 tracer experiment )

이상미,윤순창,홍민선 한국대기환경학회 1998 한국대기환경학회 학술대회논문집 Vol.- No.-

다항식 $z^{d}+(z+1)^{d}$에 의해 발생된 이상적인 자기상관을 갖는 주기 $2^{m}-1$의 이진 의사불규칙 시퀀스

노종선,정하봉,윤민선 한국통신학회 1998 韓國通信學會論文誌 Vol.23 No.5

본 논문에서는 다항식 $z^{d}+(z+1)^{d}$를 이용하여 이상적인 자기상관특성을 갖는 주기 $2^{m}-1$의 이진 의사불규칙시퀀스를 구성하는 것을 보였다. 다항식으로부터 얻어진 시퀀스는 어떤 d값에서는 m-시퀀스가된다. 또한 k가 양의 정수이고 m이 $3k{\pm}1$일 때 이상적인 자기상관특성을 갖는 새로운 이진 시퀀스를 산출하는 몇몇의 d값을 발견했다. 이들 새로운 시퀀스는 trace함수를 이용하여 표현하였으며 그 결과들을 표로 나타내었다. In this paper, we present a construction for binary pseudorandom sequences of period $2^{m}-1$ with ideal autocorraltion property using the polynomial $z^{d}+(z+1)^{d}$. We show that the sequence obtained from the polynomial becomes an m-sequence for certain values of d. We also find a few values of d which yield new binary sequences with ideal autocorrelation property when m is $3k{\pm}1$, where k is a positive integer. These new sequences are represented using trace function and the results are tabulated.

악성 전이 소견을 보인 양측 난소에 발생한 Sertoli-Leydig Cell Tumor 1예

박건호,김현희,윤혜진,최재호,윤민선,백승삼,호정규,김경태 대한부인종양 콜포스코피학회 2003 Journal of Gynecologic Oncology Vol.14 No.1

Sertoli-Leydig cell tumor는 드문 성색간질성 종양으로 양측성의 소견은 1% 미만으로 드물고 low grade malignancy에 속한다. 재발은 드물다고 알려져 있는데, 2/3가 초기 치료 후 1년 이내에 발생되고 복강내부와 후복막 림프절이 재발의 호발부위이다. 조직학적 분화도가 나쁘고 retiform pattern과 tumor rupture인 경우 악성화의빈도가 높다고 알려져 있다. 치료는 젊은 여성의 경우 병기 I일 때에는 자궁과 임신기능을 보존하는 편측 난소난관절제술을 시행한다. 1기보다 높은 병기일 경우 전자궁적출술 및 양측난소난관절제술, 골반림프절 곽청술을 시행하고 항암화학요법을 시행하기도 한다. 저자 등은 악성전이를 한 양측성 Sertoli-Leydig cell tumor를 경험하였기에 간단한 문헌 고찰과 함께 보고하는 바이다. The Sertoli-Leydig cell tumor is a rare sex cord stromal tumor that has low grade malignancy and low bilateral occurrence rate. About two third of recurrence appears within 1 year after the initial treatment and most common recurrence sites are intraperitoneal cavity and retroperitoneal lymph nodes. The frequency of malignant transformation is high in the poor differentiated cell type, retiform pattern, and tumor rupture. In young women with stage I, unilateral salpingo-oophorectomy is performed to preserve uterus and reproductive function. In more advanced stages, hysterectomy, bilateral salpingo-oophorectomy, and pelvic lymph node dissection are performed and occasionally chemotherapy can be combined. We experienced a rare case of malignant metastasis in Sertoli-Leydig cell tumor, and presented with a brief review of literature.