논문편 : 도시가정의 소형 전기기구의 구매와 사용관리에 관한 연구 - 전기밥솥 , 전기 프라이 팬 , 토우스터 , 블렌더를 중심으로 -

이정우,이정숙 ( Jung Woo Lee,Jung Sook Lee ) 대한가정학회 1986 Human Ecology Research(HER) Vol.24 No.2

핀테크의 거시적 영향

이정우 ( Jung Woo¸ Lee ) 한국지급결제학회 2020 지급결제학회지 Vol.12 No.2

핀테크는 전통적 금융기관에 어떻게 변화를 가져올까? 세계적으로 핀테크가 확대하는 배경의 하나로서 ‘이용자의 가치관의 변용’을 지적할 수 있다. 현재 핀테크로서 제공되는 서비스의 대부분은 ‘이용자의 요청’으로 제공되어 널리 평가되고 있음을 알 수 있다. 미국 투자은행 골드만삭스에 따르면 향후 5-10년 후 미국 내 총 대출액 중 약 1/3에 해당하는 4조 달러가 대체금융서비스로 제공될 것으로 내다 봤다. 융자 분야에서는 결제 트랜잭션 데이터를 이용한 융자 서비스 이외에도 새로운 서비스가 등장하고 있다. 마켓플레이스 렌딩 크라우드 펀딩(Crowd funding)으로 불리는 핀테크 서비스는 전통적인 금융기관이 제공하는 융자 서비스와 다른 형태로 융자를 해주는 서비스로 주목받고 있다. 일찍이 P2P 렌딩이라고도 불린 이러한 서비스는, 대체로 인터넷을 통해서 투자가·대여자와 차주를 연결시켜(매칭), 불특정 다수로부터 비교적 소액으로 자금을 모으는 것이다. 본고는 우선 우리나라의 핀테크 관련 투자가 위와 같은 외국과 비교해 극단적으로 낮다는 점과 사업투자 펀드와 같은 우리나라에 특유한 신규사업에 대한 투자확대의 가능성을 설명한다. 다음은 금융경제 교육의 필요성과 현황에 대해 밝힐 것이다. 마지막으로 핀테크가 각 경제주체에 미치는 영향을 이론적으로 분석하여 거시경제에 미치는 영향에 대해서는 핀테크의 플러스 효과와 마이너스 효과가 있음을 밝히고 그 파급경로를 설명한다. How will FinTech change traditional financial institutions? As one of the backgrounds that FinTech is expanding globally, it can be pointed out ‘change of users’ values.’ It can be seen that most of the services currently provided as FinTech are provided as ‘requests of users’ and are widely evaluated. According to Goldman Sachs, an investment bank in the United States, in the next 5 to 10 years, about a third of the total amount of loans in the United States, or $4 trillion, will be provided as alternative financial services. In the field of financing, new services are emerging in addition to financing services using payment transaction data. Fintech service, called marketplace lending crowd funding, is attracting attention as a service that provides loans in a different form than those provided by traditional financial institutions. These services, also known as peer-to-peer lending, usually connect investors, lenders and borrowers through the Internet (matching), and collect funds in relatively small amounts from an unspecified majority. First of all, this paper explains that Korea’s FinTech-related investment is extremely low compared to those of foreign countries, and the possibility of expanding investment in new businesses unique to Korea such as a business investment fund. The following will reveal the necessity and status of financial economy education. Finally, the effect of FinTech on each economic entity is theoretically analyzed, revealing the positive and negative effects of FinTech on the macroeconomic impact, and explaining its ripple path.

아미설프라이드로 유발된 고프로락틴혈증: 예비 연구

이정우,박영민,이승환,강승걸,이분희,박은진,Lee, Jung-Woo,Park, Young-Min,Lee, Seung-Hwan,Kang, Seung-Gul,Lee, Bun-Hee,Park, Eun-Jin 한국정신신체의학회 2011 정신신체의학 Vol.19 No.1

연구목적: 고프로락틴혈증은 항정신병약물로 인한 흔한 부작용이다. 그럼에도 불구하고 이러한 고프로락틴혈증에 대한 임상가들의 관심은 적은 편이다. 왜냐하면 고프로락틴혈증으로 인한 부작용의 심각성이 널리 알려지지 않았기 때문이다. 특히 아미설프라이드로 인한 고프로락틴혈증에 대한 국내 연구는 전무한 실정이다. 본 연구에서는 한국인에서의 아미설프라이드로 인한 프로락틴 수치의 변화를 알아보고자 한다. 방 법: 2008년 1월부터 2010년 12월까지 일산백병원 신경정신과의 외래와 입원 환자 24명을 대상으로 의무기록을 검토하여 자료를 분석하였다. 이를 통해 아미설프라이드 사용 전후의 프로락틴 수치의 변화를 비교하였다. 또한 아미설프라이드 용량, 투약 기간과 프로락틴 수치 변화율과의 상관관계를 통계적으로 분석하였다. 결 과: 아미설프라이드를 투여한 모든 환자에서 고프로락틴혈증이 발생하였다. 아미설프라이드 투여 후의 프로락틴 수치는 투여 전 보다 유의하게 상승하였다(z=-3.702, p=0.000). 아미설프라이드 용량과 프로락틴 상승의 정도는 유의한 상관관계를 보였으나(r=0.61, p=0.002), 아미설프라이드 투여 기간과 프로락틴 상승의 정도는 유의한 상관관계를 보이지 않았다. 또한 아미설프라이드 용량과 프로락틴 수치 변화율은 유의한 상관관계를 보이지 않았다. 결 론: 아미설프라이드를 포함한 항정신병약물은 프로락틴 수치를 증가시켜 장 단기간의 부작용을 발생시킬 수 있다. 따라서 아미설프라이드를 사용하는 임상의는 프로락틴 수치를 정기적으로 측정하여야 하며 고프로락틴혈증과 관련된 부작용을 평가하여야 한다. Objective: Hyperprolactinemia is common side effect associated with antipsychotics use. Nevertheless, hyperprolactinemia is relatively neglected by clinician. Especially, there is no study related to amisulprideinduced hyperprolactinemia in korea. This study aimed to determine whether amisulpride can be induced hyperprolactinemia in Korean psychiatric patients. Methods: This study methodology consisted of a retrospective review of medical charts and prolactin levels. Serum prolactin levels were measured in 24 Korean patients(12 males and 12 females) with psychosis who were treated over 400mg of amisulpride per day. Results: All patients had hyperprolactinemia. Prolactin levels significantly increased after receiving amisulpride(z=-3.702, p=0.000). The prolactin level was significantly higher in females($156.29{\pm}63.75$ng/mL) than in males($69.04{\pm}39.91$ng/mL) after administering amisulpride(p=0.000). There was a correlation between dosage and prolactin levels(r=0.61, p=0.002). However, there was no correlation between duration of treatment and prolactin levels. Conclusions: Antipsychotics, especially amisulpride can increase serum prolactin levels and may results in short and long term side effects. Routine clinical assessment of initial and additional prolactin level and associated symptoms should be done

과다 유두(Supernumerary Nipple) 2례

이정우,양정덕,이정훈,최강영,김귀락,정호윤,조병채,Lee, Jeong-Woo,Yang, Jung-Dug,Lee, Jung-Hun,Choi, Kang-Young,Kim, Gui-Rak,Chung, Ho-Yun,Cho, Byung-Chae 대한성형외과학회 2010 Archives of Plastic Surgery Vol.37 No.5

Purpose: Supernumerary nipple or polythelia is one of the developmental anomalies occurring at the embryonic stage and this anomaly usually arises from the milk line. While this atypical feature is determined during early developmental stage, it may not come out obviously or become troublesome until puberty or lactation. Moreover, sometimes it is confused with a pigmented nevus. Methods: Case 1, a 18-year-old woman with intramammary supernumerary breast consisted of another nipple with middle sized areola on the right lower breast was admitted for a $2.8{\times}3.1\;cm$-sized mass on the right breast which was starting appeared 1 year earlier. The preliminary cytological examination of the material obtained by needle aspiration biopsy from the mass was revealed by fibroadenoma with no malignant change. The patient had the surgical excision of the mass and accessory breast. Case 2, a 16 year-old woman admitted for intra-areolar polythelia of the left breast, even she doesn't have any family history of polythelia. Since she wanted surgical correction of her atypical nipple for aesthetic and psychological reasons, we reconstructed the areola using transposition flaps in an S-plasty design. Results: Case 1, the excised supernumerary nipple showed following histological features. In the superficial layer, an acanthotic and hyperpigmented epithelium with elongated rete ridges was found. In the dermis, there were follicles with hairs surrounded by hypertrophic sebaceous glands. In the deepest portion, abundant secretory glomerules and excretory ducts of apocrine gland type were observed. Case 2, follow-up visits 3 months after the procedure showed a satisfactory result with good shape and projection of the nipple. Conclusion: We report two cases of aberrant mammary tissue who underwent surgical correction, including complete breast (with nipple, areola, and glandular tissue) and intra-areolar polythelia according to the Kajava's classification, and the results were satisfactory.

2-HP-β-시클로덱스트린과 메글루민을 이용한 란소프라졸의 포접화합물 제조 및 평가

이정우,김정수,장혜진,이계원,지웅길,Lee, Jung-Woo,Kim, Jung-Su,Chang, Hye-Jin,Lee, Gye-Won,Jee, Ung-Kil 한국약제학회 2004 Journal of Pharmaceutical Investigation Vol.34 No.4

To enhance the solubility and stability of lansoprazole (LAN), new proton pump inhibitor, we were prepared various molar ratio of inclusion complex with $2-hydroxypropyl-{\beta}-cyclodextrin$ (HPCD) and organic alkali agent, meglumine (MEG). Inclusion complex formation of LAN with HPCD was investigated by Differential Scanning Calorimetry and X-ray diffractometry. The aqueous solubilities of inclusion complexes, and the stabilities of 1:4 and 1:5 inclusion complexes in aqueous solutions containing different concentrations of MEG were examined. The stability of 1:5 LAN-HPCD inclusion complex containing MEG, which was equaled to amount of LAN, was performed in 0.9% NaCl and 5% dextrose solution. The formation of inclusion complex of LAN with HPCD was $A_L$ type and the molar ratio of complex was 1:1. The stability constant was $41.557\;M^{-1}$. As molar ratio of LAN to HPCD was increased, solubility of inclusion complex was increased. 1:5 LAN-HPCD inclusion complex was more stable than 1:4 LAN-HPCD inclusion complex. And as contained MEG amount in LAN solution was increased, stability of 1:4 and 1:5 LAN-HPCD inclusion complexes was improved. Also stability of 1:5 LAN-HPCD-MEG inclusion complex in 0.9% NaCl solution and 5% dextrose solution was similar to it in water at room temperature, but it was unstable at $40^{\circ}C$.

Fillet Flap Coverage for Closure of Diabetic Foot Amputation

이정우,유환,박재용,Lee, Jung Woo,Ryu, Hwan,Park, Jae Yong Korean FootAnkle Society 2020 대한족부족관절학회지 Vol.24 No.4

Purpose: Minor foot amputations are performed for recurrent or infected ulcers or osteomyelitis of the diabetic feet. Patients may require a large amount of bone resection for wound closure. On the other hand, this results in more foot dysfunction and a longer time to heal. The authors describe fillet flap coverage to avoid more massive resection in selected cases. This study shows the results of fillet flap coverage for the closure of diabetic foot minor amputation. Materials and Methods: This was a retrospective case series of patients who underwent forefoot and midfoot amputation and fillet flap for osteomyelitis or nonhealing ulcers between March 2013 to November 2017. In addition, the patient comorbidities, hospital days, complications, and duration to complete healing were evaluated. Results: Fourteen fillet flap procedures were performed on 12 patients. Of those, two had toe necrosis, nine had forefoot necrosis, and three had midfoot necrosis. Eleven forefoot amputations and three midfoot amputations were performed. Among forefoot necrosis after a fillet flap, three patients had revision surgery for partial necrosis of the flap, and two patients had an additional amputation. Two patients had additional amputations among those with midfoot necrosis. By the fillet flap, the amputation size was reduced as much as possible. The mean initial healing days, complete healing days, and hospital stay was 70.6 days, 129.0 days, and 60.0 days, respectively. Conclusion: The fillet flap facilitates restoration of the normal foot contour and allows salvage of the metatarsal or toe.

세기변조방사선치료 선량분포 확인을 위한 2차원적 이온전리함 배열의 특성분석

이정우,홍세미,김연래,최경식,정진범,이두현,서태석,Lee, Jeong-Woo,Hong, Se-Mie,Kim, Yon-Lae,Choi, Kyoung-Sik,Jung, Jin-Beom,Lee, Doo-Hyun,Suh, Tae-Suk 한국의학물리학회 2006 의학물리 Vol.17 No.3

본 연구의 목적은 2차원적 이온전리함 배열의 특성을 분석하고 세기변조방사선치료 선량분포 확인의 유용성을 평가하기 위함이다. 본 실험에 사용된 2차원적 이온전리함 배열(MatriXX, Scanditronix-Wellhofer, IBA, Germany)은 $24{\times}24cm^2$ 범위에 1,024개의 평판형 전리함(용적: $0.08cm^3$, 직경: 4.5 mm, 높이: 5 mm, 배열간격: 7.62 mm)이 일정한 간격으로 배열되어있다. MatriXX의 특성분석을 위해 선량 직선성, 선량률 의존도, 출력 계수, 단기 선릉재현성을 분석하였으며, 선량분포 확인의 신뢰도를 평가하기 위해 Varian사의 동적쐐기와 세기변조 방사선치료의 선량분포를 분석하였다. 선량 직선성의 범위는 $1{\sim}800$cGy이었으며, 1% 미만의 오차율을 보였다. 선량률 의존성(범위 $100{\sim}600MU/min$)은 300 Mu/min을 기준으로 했을 때 모든 선량률 범위에서 0.4% 미만의 선량변화를 보였다. 또한, 물팬톰에서 0.1 cc 지두형 전리함으로 측정한 출력계수와 폴리스틸렌 팬톰에서 MatriXX로 측정한 출력계수를 비교하였다. 이 실험의 결과, $3{\times}3{\sim}24{\times}24cm^2$ 범위에서 0.5% 미만의 일치를 나타내었다. 단기 출력재현성 확인을 위하여 15분 간격으로 6회 측정한 결과, 0.5% 내의 차이를 보였다. 동적쐐기와 세기변조 방사선 조사면의 일치성 실험에서도 치료계획장치의 계산값과 필름측정값이 비교적 잘 일치함을 알 수 있었다. 본 연구를 통해 MatriXX의 물리적인 특성을 분석하였으며 세기변조방사선치료의 품질관리를 위한 유용성을 확인하였다. A commercial ion chamber matrix was examined the characteristics and its performance for radiotherapy qualify assurance. The device was the I'mRT 2D-MatriXX (Scanditronix-Wellhofer, Schwarzenbruck, Germany). The 2D-MatriXX device consists of a 1020 vented ion chamber array, arranged in $24{\times}24cm^2$ matrix. Each ion chamber has a volume of $0.08cm^3$, spacing of 0.762 cm and minimum sampling time of 20 ms. For the investigation of the characteristics, dose linearity, output factor, short-term reproducibility and dose rate dependency were tested. In the testing of dose linearity. It has shown a good signal linearity within 1% in the range of $1{\sim}800$cGy. Dose rate dependency was found to be lower than 0.4% (Range: 100-600 Mu/min) relative to a dose rate of 300 Mu/min as a reference. Output factors matched very well within 0.5% compared with commissioned beam data using a ionization chamber (CC01, Scanditronix-Wellhofer, Schwarzenbruck, Germany) in the range of field sizes $3{\times}3{\sim}24{\times}24cm^2$. Short-term reproducibility (6 times with a interval of 15 minute) was also shown a good agreement within 0.5%, when the temperature and the pressure were corrected by each time of measurement. in addition, we compared enhanced dynamic wedge (EDW, Varian, Palo Alto, USA) profiles from calculated values in the radiation planning system with those from measurements of the MatriXX. Furthermore, anon-uniform IMRT dose fluence was tested. All the comparison studies have shown good agreements. In this study, the MatriXX was evaluated as a reliable dosimeter, and it could be used as a simplistic and convenient tool for radiotherapy qualify assurance.

대학생의 ' 생활예절 ' 관심도 및 수강 후 태도 , 행동 변화에 대한 만족도 - 숙대생을 대상으로 -

이정우,김연화 ( Jung Woo Lee,Yeon Hwa Kim ) 대한가정학회 1998 Family and Environment Research Vol.36 No.12

소아에서 수술 후 발생한 장폐색에 대한 복강경 유착박리술의 초기 경험

이정우,정은영,박우현,최순옥,Lee, Jeongwoo,Jung, Eunyoung,Park, Woo-Hyun,Choi, Soon-Ok 대한소아외과학회 2013 소아외과 Vol.19 No.1

The purpose of this study is to analyze the early experience of the laparoscopic adhesiolysis for the intestinal obstruction due to postoperative adhesion. Seven patients were included in this study. The median age of those patients was 13, and there were 3 males and 4 females. Previous diagnosis and surgical procedure were various in seven cases, including small bowel resection with tapering enteroplasty, Boix-Ochoa fundoplication, Ladd's procedure with appendectomy, mesenteric tumor resection with small bowel anastomosis, ileocecal resection and anastomosis, primary gastric repair, and both high ligation. A successful laparoscopic adhesiolysis was performed in one who had high ligation for inguinal hernia and had a single band adhesion. Six out of 7 (86%) cases needed to convert open surgery due to multiple and dense type of adhesion. In conclusion, laparoscopic approach with postoperative small bowel adhesion seems safe. However, it might be prudently considered because of high rates of conversion in children.

시계열분석을 적용한 저장탄약수명 예측 기법 연구 - 추진장약의 안정제함량 변화를 중심으로 -

이정우,김희보,김영인,홍윤기,Lee, Jung-Woo,Kim, Hee-Bo,Kim, Young-In,Hong, Yoon-Gee 한국국방경영분석학회 2011 한국국방경영분석학회지 Vol.37 No.1

야전에 저장된 탄약의 수명을 예측하는 것은 군의 전투지원 핵심요소로 실무적으로 매우 중요한 의미가 있다. 본 연구는 6년간 수행한 155mm 추진장약(KD541)의 ASRP(Ammunition Stockpile Reliability Program : 저장탄약신뢰성평가) 결과를 기초로 추진장약 추진제의 안정제함량 변화에 따른 시계열분석 (ARIMA 모델) 방법론을 적용 저장탄약수명을 예측하였다. 이번 연구는 기존의 회귀분석 모델을 활용한 연구방법과 다르게 시계열분석을 적용하되 미니 탭 프로그램을 활용하여 시계열분석을 적용 저장탄약수명을 예측하였다. 이러한 분석결과 155mm 추진장약(KD541) 저장수명은 35~43년으로 예측되었다. To predict the shelf-life of ammunition stockpiled in intermediate have practical meaning as a core value of combat support. This research is to Predict the shelf-life of ammunition by applying time series analysis based on report from ASRP of the 155mm, KD541 performed for 6 years. This study applied time series analysis using 'Mini-tab program' to measure the amount of stabilizer as time passes by is different from the other one that uses regression analysis. The average shelf-life of KD541 drawn by time series analysis was 43 years and the lowest shelf-life assessed on the 95% confidence level was 35 years.