膽囊造影에 關한 硏究(第 二報) : 담낭조영에 관한 연구(제 이보)

신승우 釜山大學校 1961 記念論文集 Vol.1961 No.-

주택연금 가입 주택 포트폴리오 가격지수에 관한 연구

신승우,유승동 국토연구원 2013 국토연구 Vol.76 No.-

This study investigates the price index for collateral portfolios held by the Korea Housing Finance Corporation (HF). When individual homes in HF JooTaekYeonKeum collateral portfolios are sold repeatedly, we can construct a repeat-sales price index for such transactions. However, once an individual home is sold, the associated reverse mortgage contract must be terminated immediately. We therefore have to inflate and deflate the value of that individual home using an available price index with respect to location and property type. We calculate an HF portfolio price index from October 2007 to October 2010 using the Ministry of Land, Transport, and Maritime Affairs (MLTM) index and then analyze it by fitting it to a GARCH specification. This study finds that this HF index is a bit more volatile than either the MLTM or the KB indexes, even though both a correlation coefficient between the HF index and the MLTM index and a correlation coefficient between the HF index and KB index are statistically significant. However, we fail to provide statistically significant support for the adverse selection hypothesis. This paper provides a quantitative measure for risk management in JooTaekYeonKeum. 본 논문은 한국주택금융공사 주택연금 포트폴리오의 가격지수에 관한 연구다. 주택연금 포트폴리오 내 담보 주택이 빈번하게 거래된다면 주택연금 포트폴리오를 대상으로 가격지수를 만들어 볼 수 있다. 그러나 담보주택 매각은 주택연금 보증 해지사유가 된다. 따라서 기존 주택유형별, 지역별 가격지수를 이용하여 주택연금 포트폴리오를 구성하는 개별 주택의 가격을 조정할 수 있다. 2007년 10월부터 2010년 10월까지 국토해양부 아파트 실거래가 동 단위 지수를 이용하여 주택연금 포트폴리오 전국 아파트 가격지수를 계산하였다. 지수의 장기균형상태 연구의 방법으로는 GARCH 모델을 이용하였다. 시계열 상관 분석 결과 공사 포트폴리오의 가격 변화율과 국토해양부 및 국민은행 가격지수의 상관계수가 통계적으로 유의하였다. 또한 주택연금 포트폴리오 월별 변화율은 국민은행 지수나 국토해양부 지수에 비하여 변동성이 더 큰 것으로 나타났다. 다만 가격 하락 시에 주택연금 가입자가 증가하는 역선택 문제는 확인되지 않았다. 이를 통해 본 논문은 주택연금 위험관리의 정량적 지표를 제공하고자 한다.

急性腹部症患者의 X線學的 考察

申勝雨,金鎭國,金炳洙 최신의학사 1967 最新醫學 Vol.10 No.8

80 patients diagnosed as having acute abdomen have been studied from the roentgenological and clinical points of view. 75 of the patients were operated upon and 14 were not. X-rays taken in the simple erect position were divided into four groups according to the patterns of bowel gases and fluid levels shown. Cases with typical spring-coiled appearances were classified as group 1, cases with sun-ray patterns as group 2 and cases with' appearances of fluid levels without plica circularis or haustral mar-kings as group 3. Cases showing irregular gas patterns in the bowel were classified as group 4. Operative findings were of two types, the simple type in which disease was localized in the intestine, and the complex type in which both the intestine and the adjoining tissues were involved. The following results were obtained : 1. The sex incidence was about 2:1, males predominating, (59 male : 30 female). The greatest number of patients were between 21 and 40 years of age, 17 being between 31 and 40 }rears and 14 being 21 and 30 years. 2. 44 patients (57/) of those receiving operative treatment reached the hospital within 24 hours of the onset of symptoms: 11 patients (75%) of those who were not operated on arrived at the hospital later than 24 hours after the first symptoms had begun. 3. The majority of patients operated upon, were found to have perforation of the bowel(64%) 19 of these (40%), being due to typhoid fever. The next most common finding at operation was intestinal obstruction in 22 patients (29%): intussusception was the cause of obstruction in 8 (36%), of these cases. 4. X-rays taken in the simple, erect position of the 48 cases of perforation of bowel, showed free gas in 31 (64.2%). Among these cases two were roentgenologically normal, 5 cases were placed in group 1, 12 cases in group 2 and 12 ir, group 3. 5. X-rays taken in the simple erect position on 19 patients found to have intestinal obstruction, showed one case to have normal bowel patterns, while 8 cases were placed in group 1, 6 case sin group 2 and 7 cases in group 3. 6. The relationship betv,,een the x-ray appearances of the bowel, and the intra-abdominal findings at operation was as follov,,s: 9 cases (75%) of simple type were placed in group 1, and 21 cases (33%) of complex type were placed in group 2; 28 complex cases (44%) were placed in group 3. Of the patients who did not have surgry, 6 cases (43%) were placed in group 1 and other 6 cases (43%) were placed in group 4.

센서 시스템을 위한 저전력 시그마-델타 ADC

신승우,권기백,박상순,최중호 한국전기전자학회 2022 전기전자학회논문지 Vol.26 No.2

Analog-digital converter (ADC) should be one of the most important blocks that convert various physical signals to digital ones for signal processing in the digital signal domain. As most operations of the analog circuit for sensor signal processing have been replaced by digital circuits, high-resolution performance is required for ADC. In addition, low-power must be the critical issue in order to extend the battery time of mobile system. The existing integrating sigma-delta ADCs has a characteristic of high resolution, but due to its low supply voltage condition and advanced technology, circuit error and corresponding resolution degradation of ADC result from the finite gain of the operational amplifier in the integrator. Buffer compensation technique can be applied to minimize gain errors, but there is a disadvantage of additional power dissipation due to the added buffer. In this paper, incremental signal-delta ADC is proposed with buffer switching scheme to minimize current and igh-pass bias circuit to improve the settling time. 다양한 물리적 신호를 디지털 신호 영역에서 처리하기 위해서 센서의 출력을 디지털로 변환하는· 아날로그-디지털 변환기 (ADC) 는 시스템 구성에 있어 매우 중요한 구성 블록이다. 센서 신호 처리를 위한 아날로그 회로의 역할을 디지털로 변환하는- 추세에 따라 이러한 ADC의 해상도는 높아지는 추세이댜 또한 ADC는 모바일 기기의 배터리 효율 증대를 위해서 저전력 성능이 요구된다. 기존 integrating 시그마-델타 ADC의 경우 고해상도를 가지는 특징이 있지만, 저전압 조건과 미세화 공정으로 인해 적분기의 연산증폭 기 이득 오차가 증가해 정확도가 낮아지게 된다. 이득 오차를 최소화하기 위해 버퍼 보상 기법을 적용할 수 있지만 버퍼의 전류가 추가된다는 단점이 있다. 본 논문에서는 이와 같은 단점을 보완하고자 버퍼를 스위칭하며 전류를 최소화시키고, 하이패스 바이어스 회로를 통해 settling time을 향상시켜 기존과 동일한 해상도를 갖는 ADC를 설계하였댜

뉴노멀 시대의 공공기관 원격보안 모델 개선방안

신승우,조인준 한국콘텐츠학회 2022 한국콘텐츠학회논문지 Vol.22 No.9

The pandemic caused by the COVID-19 virus, which has lasted for the past three years, has changed society and the way people live in many ways. These changes also affect cyberspace, so the pre-pandemic information security model and standards have limitations when applied to the current situation. In this paper, a new method to improve the information security model of public institutions was proposed in consideration of various situations in the new normal era. In other words, through the proposed information security model, the possibility of external intrusion is blocked in advance through the policy and technical supplementation of remote work, which is a weakness of the existing information security operation of public institutions. Also, how to prevent abnormal authentication attempts by building a secure VPN environment, how to prevent social engineering cyber attacks targeting fear and uncertainty caused by COVID-19, and how to use a smooth network and create a remote work environment. For this purpose, methods for securing service availability were additionally presented. 지난 3년간 지속된 COVID-19 바이러스에 의한 팬데믹 사태는 사회와 사람들의 삶의 방식을 다양한 방식으로 변화시켰다. 이러한 변화는 사이버공간에도 영향을 주어 팬데믹 이전의 정보보안 모델과 기준은 현재 상황에 적용할 때 한계가 있다. 본 논문에서는 뉴노멀 시대의 다양한 상황을 고려한 공공기관의 정보보안 모델 개선방안을 새롭게 제안하였다. 즉, 제시된 정보보안 모델을 통해 기존의 공공기관 정보보안 운영의 취약점인 원격근무의 정책적, 기술적 보완을 통해 외부 침입의 가능성을 사전 차단한다. 또한 안전한 VPN 환경 구축을 통해 비정상적 인증 시도를 방어하는 방법, COVID-19로 인한 두려움과 불확실성을 노린 사회공학기반 사이버 공격(Social Engineering Cyber Attack)을 예방하는 방법, 원활한 네트워크 사용 및 원격근무 환경 조성을 위해 서비스 가용성을 확보하는 방법 등을 추가로 제시하였다.

Accelerometer-derived physical activity and sedentary behavior patterns among Korean adults

신승우,김현민,강영훈,김정훈 한국운동영양학회 2023 Physical Activity and Nutrition (Phys Act Nutr) Vol.27 No.2

[Purpose] This study aimed to provide an overview of accelerometer-derived physical activity (PA) and sedentary behavior (SB) patterns among Korean adults. We also investigated the association between participant characteristics and the likelihood of adherence to moderate-to-vigorous physical activity (MVPA), SB, and the MVPA-SB guidelines. [Methods] Data from the 2014-2017 Korea National Health and Nutrition Examination Survey were used. The study involved a nationally representative sample of 2,260 Korean adults aged ≥20 years. Accelerometers were used to measure PA and SB for seven days. Multivariate logistic regression models were used to assess the association between the participant characteristics and the likelihood of adhering to the MVPA, SB, and MVPA-SB guidelines. [Results] SB (60.61%), light intensity (26.22%), and lifestyle activities (9.4%) accounted for the majority of the participants’ days. MVPA and VPA accounted for 3.72% and 0.06% of the days, respectively. The MVPA guidelines were more likely to be adhered to by men, older adults, participants with higher education, non-smokers, and individuals without multimorbidity. Participants with higher education and household income were less likely to adhere to the SB guidelines. Women (OR=0.51), participants with high education levels (OR=0.54), current smokers (OR=0.47), and patients with multimorbidity (OR=0.46) were less likely to adhere to the MVPA-SB guidelines. [Conclusion] This study found that participants were predominantly sedentary, with only a small proportion engaging in VPA. There were differences related to demographic factors and health status. Most Korean adults do not adhere to the recommended MVPA-SB guidelines, and that is a serious public health concern. These findings highlight the need to promote PA and reduce SB through public health policies and interventions, particularly for adults facing PA barriers.

Wolff-Hirschorn Syndrome (WHS) 환아의 치과 치료 -증례보고-

신승우,김종수,김승오,Shin, Seung-Woo,Kim, Jong-Soo,Kim, Seung-Oh 대한치과마취과학회 2011 Journal of Dental Anesthesia and Pain Medicine Vol.11 No.1

Wolff-Hirschorn syndrome is a condition that is caused by a deletion of genetic material near the end of the short (p) arm of chromosome 4. The major features of this disorder include a characteristic facial appearance, delayed growth and development, intellectual disability, and seizures. A 9-year-old girl was brought to the clinic with a chief complaint of dental examination. The child was diagnosed as WHS at Samsung medical center. The child was under Sodium valproate, Atrovastatin medication for epilepsy, hyperlipidemia and had a history of heart surgery. So prophylactic antibiotics were recommended. The child was mentally retarded and had seizure so it was difficult to manage her behavior effectively. Thus dental treatment was carried out under general anesthesia. For prompt sedation induction we used 8% sevoflurane shortly. This report presents the case of a 9-year-old girl with WHS, who has received treatment for extensive caries under general anesthesia.

The Effect of Transportation Policy Changes on Retail Market Trade Area Dynamics

신승우,김경선 한국주거환경학회 2018 주거환경(한국주거환경학회논문집) Vol.16 No.3

This paper addresses the effect of two different transportation policy changes on retail market trade area dynamics in a district in Seoul, Korea. We test the effect on retail market area formation and inter-temporal changes in the market area due to transportation policies such as the introduction of new bus routes and the opening of new subway lines. In order to test these hypotheses, we employ a new measure, a gradient of assessed value of commercial land lots. We found that new bus routes might exert merely marginal influence on retail market area especially in the area where transport infrastructure is ready enough to serve the district. On the contrary the introduction of third subway line to the same district where two subway lines have already been operating shows statistically significant effect based on t-test. In addition, we visualize the retail market areas and intertemporal dynamics in the market areas of the district. Our innovative method utilizing tax assessed value data with a measure of their gradients seems to be an effective alternative to district-wide social experiments in urban cities.

초등 예비교사의 체육교육신념과 수업지식 및 자기효능감의 관계

신승우,나윤수,남광우 한국스포츠학회 2017 한국스포츠학회지 Vol.15 No.3

이 연구는 초등 예비교사의 체육교육신념과 수업지식 및 자기효능감의 관계를 규명하는데 목적이 있었다. 이를 위해 부산・인천・전북에 위치한 교육대학교의 재학생을 대상으로 편의표집방법을 이용하여 총 232명의 자료를 표집하 였다. 이중 신뢰할 수 없는 30부의 설문지를 제외한 총 202명의 자료가 실제 분석에 활용됐으며, 연구목적에 따라 통계 프로그램인 SPSS Statistics 21을 이용하여 빈도분석, 탐색적 요인분석, 신뢰도분석, 상관관계분석, 표준중다회귀분 석을 실시하였다. 연구결과를 살펴보면, 첫째, 초등 예비교사의 체육교육신념은 수업지식에 부분적으로 영향을 미치는 것으로 나타났다. 구체적으로 성숙주의는 수업내용지식에 정(+)적 영향을, 수업전략지식에는 부(-)적영향을 미치는 것으로 나타났다. 행동주의에서는 수업목표지식, 학생이해지식, 수업전략지식에 정(+)적 영향을, 수업내용지식에는 부(-)적 영향을 미치는 것으로 나타났다. 상호작용주의는 학생이해지식, 수업내용지식, 수업전략지식에 정(+)적 영향 을 미치는 것으로 나타났다. 둘째, 초등 예비교사의 체육교육신념은 자기효능감에 유의한 영향을 미치는 것으로 나타났 다. 성숙주의는 일반적 자기효능감에 부(-)적 영향을 미치는 것으로 나타났으며, 행동주의와 상호작용주의는 일반적, 사회적 자기효능감 모두 정(+)적 영향을 미치는 것으로 나타났다. 셋째, 초등 예비교사의 수업지식은 자기효능감에 유 의한 영향을 미치는 것으로 나타났다. 수업목표지식, 학생이해지식은 일반적, 사회적 효능감에 정(+)적 영향을, 수업내 용지식은 일반적 자기효능감에 부(-)적 영향을 미치는 것으로 나타났다. The purpose of this study is find out the relationship among physical educational belief, pedagogical content knowledge and self-efficacy of pre-service elementary school teachers. For this reason, we conducted a survey of undergraduate students in universities of education, located in Busan, Incheon and Jeollabuk-do, and 232 data were collected by the convenience sampling method. Except unreliable 30 questionnaires, 202 collected data were used by SPSS Statistics 21. This study was conducted by frequency analysis, exploratory factor analysis, reliability analysis, correlation analysis and standard multiple regression analysis. Upon investigation our results lead to the following conclusions: At first, it showed that physical educational belief of pre-service elementary school teachers partially had influence on pedagogical content knowledge. In the concrete, maturism had a positive influence on pedagogical content knowledge, but negative influence on pedagogical strategy knowledge. Behaviorism had a positive influence on pedagogical objective knowledge, knowledge of students understanding and pedagogical strategy knowledge, but negative - on pedagogical content knowledge. Interactionism had a positive influence on knowledge of students understanding, pedagogical content knowledge and pedagogical strategy knowledge. Second, it was turned out that physical educational belief of pre-service elementary school teachers exerted an influence on self-efficacy. Maturism had a negative effect on general self-efficacy, but behaviorism and interactionism had a positive effect on general and social self-efficacy. Third, it was demonstrated that pedagogical content knowledge of pre-service elementary school teachers influenced the self-efficacy. Pedagogical objective knowledge, knowledge of students understanding had a positive influence on general and social self-efficacy, but pedagogical content knowledge had a negative influence on general self-efficacy.

An Empirical Study on the Choice of Residential Mortgage Lender by Korean Households

신승우 한국주거환경학회 2008 주거환경(한국주거환경학회논문집) Vol.6 No.2

본 연구는 국민은행의 주택금융수요 실태조사 자료를 이용하여 일반 서민가구의 주택담보 대출유형, 특히 주택금융공사의 보금자리론으로 대표되는 공공 모기지와 여타 민간은행의 민간 모기지간의 선택에 영향을 미치는 요인을 탐구하였다. 우리는 보금자리론이 출시된 2004년부터 2006년까지의 3개년치의 자료를 투입하여 다항 로짓(Multinomial Logit) 모델 및 중첩 로짓(Nested Logit) 모델을 적용하여 분석하였다. 미국의 실증분석 결과와는 달리 우리의 경우 서민가구들이 공공 모기지 보다는 민간 모기지를 선호하는 것으로 보인다. 그 이유로는 민간 모기지 상품의 다양성이나 이자유형 변경옵션과 같은 상품자체에 기인하는 속성과 함께 민간 대출기관의 느슨한 소득 검증(Income verification)과 같은 규제적 특성 역시 중요한 요인인 것으로 분석되었다.