하둡 빅데이터 처리 플랫폼 기반의 교육전산망 자원 효율화 연구

정우석(Jung Woo-Suk),이수강(Lee Su-Kang),심규석(Sim Kyu-Seok),김성민(Kim Sung-Min),김명섭(Kim Myung-Sup) 한국통신학회 2015 한국통신학회 학술대회논문집 Vol.2015 No.06

부산신항 컨테이너터미널 효율성 및 생산성 비교 분석

강석한(Seok-Han Kang),남정우(Jung-Woo Nam),심민섭(Min-Seop Sim),김율성(Yul-Seong Kim) 한국항해항만학회 2021 한국항해항만학회지 Vol.45 No.3

한진해운 파산 및 해운동맹의 재정립 등으로 부산항 컨테이너터미널의 운영 효율성 및 생산성 분석의 필요성이 증가하고 있다. 본 논문은 항만공사 공시자료 및 수집된 터미널 내부자료를 바탕으로 DEA 분석 및 Malmquist 생산성 지수 모형을 활용하여 부산신항 컨테이너터미널 5개사의 효율성 및 생산성을 분석하였다. 분석결과 컨테이너터미널 5개사의 평균 효율성은 2018년 증가하였으나 2019년 소폭 하락한 것으로 나타났으며, Malmquist 지수를 통해 종합적인 생산성 변화를 살펴보면 A사를 제외한 모든 터미널이 생산성이 진보한 것으로 나타났다. 또한 설비 생산성의 경우 부산신항 남컨테이너터미널보다 북컨테이너터미널에 위치한 운영사들이 높은 것으로 나타났고, 자본 생산성의 경우 국적 선사인 HMM이 기항하는 D사가 가장 높은 것으로 나타났다. 노동 생산성의 경우 C사가 가장 높은 생산성을 보였으며, 선박작업 생산성의 경우 A사가 가장 높은 생산성을 보였다. The need for analysis of the operational efficiency and productivity of the Busan Port Container Terminal is increasing because of the Hanjin Shipping s bankruptcy and the re-establishment of the Maritime Alliance. This paper analyzes the efficiency and productivity of five Busan New Port Container Terminal companies by using the DEA analysis and Malmquist productivity index model based on the port construction disclosure data and the collected terminal internal data. According to the analysis, the average efficiency of the five container terminals increased in 2018 but declined slightly in 2019, and the Malmquist index showed that all terminals except A have advanced productivity. Additionally, relative to facility productivity, operators at the North Container Terminal had higher facility productivity than operators at the Busan New Port Nam Container Terminal, and regarding capital productivity, the D terminal ported by HMM, a national shipping company, was the highest in facility productivity. Regarding labor productivity, the C terminal showed the highest productivity, and regarding ship work productivity, the A terminal showed the highest productivity.

Analysis of the Legal Effect of Settlement Agreements Prepared in Medical Litigation Following Plastic Surgery in Korea

권정우,박보영,강소라,홍승은 대한성형외과학회 2017 Archives of Plastic Surgery Vol.44 No.4

Background Settlements between doctors and patients provide a solution to complicated disputes. However, some disputes may be renewed as a result of negligence by both parties. The purpose of this study was to review the legal issues that may potentially arise during the preparation of settlement agreements and to propose a list of requirements for ensuring the effectiveness of these settlement agreements. Methods Data from 287 civil cases concerning aesthetic surgery that took place between 2000 and 2015 were collected from a court database in South Korea. Factors that influenced the effectiveness of settlement agreements were analyzed. Results Among the 287 court precedents, there were 68 cases of covenant not to sue. Eighteen cases were dismissed because the settlement agreements were recognized as effective, and 50 cases were sent forward for judgment on their merits because the agreements were not recognized as effective. The types of surgery and types of complications were classified by frequency. We evaluated the geographical distribution of the precedents, the settlement timing, and the effectiveness and economic impact of the settlements. We found that there was no statistically significant relationship among these factors. Four major factors that made a settlement agreement legally effective were identified, and the data showed that fee-free reoperations were not considered by the court in determining the compensation amount. Conclusions When preparing a settlement agreement, it is advisable to review the contents of the agreement rather than to take the preparation of a settlement agreement per se to be legally meaningful.

The Effect of Botulinum Toxin on an Iatrogenic Sialo-Cutaneous Fistula

홍승은,권정우,강소라,박보영 대한두개안면성형외과학회 2016 Archives of Craniofacial Surgery Vol.17 No.4

A sialo-cutaneous fistula is a communication between the skin and a salivary gland or duct discharging saliva. Trauma and iatrogenic complications are the most common causes of this condition. Treatments include aspiration, compression, and the administration of systemic anticholinergics; however, their effects are transient and unsatisfactory in most cases. We had a case of a patient who developed an iatrogenic sialo-cutaneous fistula after wide excision of squamous cell carcinoma in the parotid region that was not treated with conventional management, but instead completely resolved with the injection of botulinum toxin. Based on our experience, we recommend the injection of botulinum toxin into the salivary glands, especially the parotid gland, as a conservative treatment option for sialo-cutaneous fistula.

자궁내 태아사망에 관한 임상적 고찰

이두진,정우강,김환,이만재 대한산부인과학회 1993 Obstetrics & Gynecology Science Vol.36 No.4

1986년1월부터 1990년 12월까지 만 5년간 대전을지병원 산부인과에서 입원분만한 3,384예 중 임신 20주이후에 태아의 체중이 500gm이상인 자궁내 태아사망 108예의 임상기록을 기초 로 관찰분석하여 다음과 같은 결론을 얻었다. 1. 자궁내 태아사망의 발생빈도는 3.19%였다. 2. 연령분포는 20세에서 39세가지의 분포를 보였으며 그중 25~29세군이 51.8%로 가장 많았다. 3. 임신력은 초임부에서 58.3%로 가장 많았고, 자연유산의 기왕력은 10.2%에서 있었다. 4. 자궁내 태아사망의 기왕력이 있었던 경우는 8.3%였다. 5. 혈액형은 A형 Rh양성이 36.1%로 가장 많았다. 6. 임신주수별 분포는 25~28주에서 22.2%로 가장 많았다. 7. 태위는 두위가 80.6%로 가장 많았고, 남아와 여아의 비는 1.35:1이었으며, 78%에서 태아체 중이 2500gm이하였다. 8. 분만방법은 유도분만이 74.1%로 가장 많았고, 수술적 분만이 13.9%, 자연분만이 12.0%였다. 9. 자궁내 태아사망의 원인은 원인불명이 41.7%로 가장 많았다. 10. 모성합병증은 25.9%에서 나타났고, 이중 출혈이 53.6%로 가장 많았다. 11. 2회이상 산전관리 경험이 있는 예는 95.4%였다. 12. 혈소판 수가 50,000~100,000/mm3으로 감소한 경우가 7.1%였고 부분 트롬보 프라스틴 시간이 50초이상으로 연장되었던 경우가 1예있었다. 혈장섬유소원치가 150mg/dl이 하인 경우는 5.5%였고, FDPs가 40㎍/ml이상으로 증가한 경우가 12.5%였다. A clinical analysis of 108 cases of FDIU among 3384 deliveres at Daejeon Eulgi Hospital during 5 years from, January 1986 to December 1990 was made. The incidence of FDIU was 3.19%, the age distribution of mother with FDIU was 20 to 39 years old, and the highest group was 25 to 29 years old age group (51.8%). The parity of mother with FDIU was most highest in nulliparous group (58.3%), and there were 11 cases (10.2%) with previous history of spontaneous abortion, only 8.3% of FDIU cases had previous history of FDIU. The most common blood type was Rh positive A type(36.1%). The most common gestational weeks when FDIU was detected, was 25 to 28 weeks gestation period (22.2%). The most common presentation was cephalic (80.6%), and the sex ratio of male versus female fetus was 1.35:1, and 78% of FDIU weighing less than 2500gm. The mode of delivery for FDIU was induced labor (74.1%), spontaneous delivery (12%), and laparotomy (13.9%). The causes of FDIU were unexplained cases (41.7%), followed chorioamnionitis (12.0%), preeclampsia (10.2%), congenital anomaly (6.5%), maternal illness (5.6%), placental abruption (4.6%), placenta previa (3.7%), syphilis (2.8%), uterine rupture (1.9%), and trauma (0.9%). There were 28 cases (25.9%) of maternal complication, and the most common complication was hemorrhage (53.6%). The mother who had received antenatal care over 2 times were 95.4% of the cases, even without adequacy in its quality. In the incidence of abnormal coaulation test, the low platelet count (50,000~100, 000/mm3) was 7.1%, the prolonged partial thromboplastine time ($gt;50 sec.) was 1.4%, the hypofibrinogenemia ($lt; 150mg/dl) was 5.55%, and the elevated fibrinogen degradation products ($gt;40㎍/ml) was 12.5%. The incidence of FDIU by early detection during prenatal care of the risk factors related to FDIU. Early diagnosis and early treatment must be given to prevent maternal complications.

Informed Consent as a Litigation Strategy in the Field of Aesthetic Surgery: An Analysis Based on Court Precedents

박보영,권정우,강소라,홍승은 대한성형외과학회 2016 Archives of Plastic Surgery Vol.43 No.5

Background In an increasing number of lawsuits doctors lose, despite providing preoperative patient education, because of failure to prove informed consent. We analyzed judicial precedents associated with insufficient informed consent to identify judicial factors and trends related to aesthetic surgery medical litigation. Methods We collected data from civil trials between 1995 and 2015 that were related to aesthetic surgery and resulted in findings of insufficient informed consent. Based on these data, we analyzed the lawsuits, including the distribution of surgeries, dissatisfactions, litigation expenses, and relationship to informed consent. Results Cases were found involving the following types of surgery: facial rejuvenation (38 cases), facial contouring surgery (27 cases), mammoplasty (16 cases), blepharoplasty (29 cases), rhinoplasty (21 cases), body-contouring surgery (15 cases), and breast reconstruction (2 cases). Common reasons for postoperative dissatisfaction were deformities (22%), scars (17%), asymmetry (14%), and infections (6%). Most of the malpractice lawsuits occurred in Seoul (population 10 million people; 54% of total plastic surgeons) and in primary-level local clinics (113 cases, 82.5%). In cases in which only invalid informed consent was recognized, the average amount of consolation money was KRW 9,107,143 (USD 8438). In cases in which both violation of non-malfeasance and invalid informed consent were recognized, the average amount of consolation money was KRW 12,741,857 (USD 11,806), corresponding to 38.6% of the amount of the judgment. Conclusions Surgeons should pay special attention to obtaining informed consent, because it is a double-edged sword; it has clinical purposes for doctors and patients but may also be a litigation strategy for lawyers.

Analysis of Malpractice Claims Associated with Surgical Site Infection in the Field of Plastic Surgery

박보영,권정우,강소라,홍승은 대한의학회 2016 Journal of Korean medical science Vol.31 No.12

Postoperative infections are rare after plastic surgery; however, when present, they can affect the aesthetic outcome. Currently, many malpractice lawsuits are associated with surgical site infection. The present study aimed to analyze malpractice claims associated with surgical site infection in the field of plastic surgery through a review of Korean precedents. We analyzed the type of procedure, associated complications, and legal judgment in these cases. Most claimants were women, and claims were most often related to breast surgery. The common complications related to surgical site infection were deformity, scar, and asymmetry. Among the 40 cases, 34 were won by the plaintiff, and the mean claim settlement was 2,832,654 KRW (USD 2,636.6). The reasons for these judgements were as follows: 1) immediate bacterial culture tests were not performed and appropriate antibiotics were not used; 2) patients were not transferred to a high-level hospital or the infection control department was not consulted; 3) surgical site infection control measures were not appropriate; and 4) surgical procedures were performed without preoperative explanation about surgical site infection. The number of claims owing to surgical site infection after surgery is increasing. Infection handling was one of the key factors that influenced the judgement, and preoperative explanation about the possibility of infection is important. The findings will help surgeons achieve high patient satisfaction and reduce liability concerns.

네트워크 트래픽 분석을 위한 Snort Content 규칙 자동 생성

심규석(Kyu-Seok Shim),윤성호(Sung-Ho Yoon),이수강(Su-Kang Lee),김성민(Sung-Min Kim),정우석(Woo-Suk Jung),김명섭(Myung-Sup Kim) 한국통신학회 2015 韓國通信學會論文誌 Vol.40 No.4

소화기 ; 숙변대장염의 임상적 결과

정형주 ( Hyoung Chu Joung ),한군희 ( Koon Hee Han ),조민형 ( Min Hyoung Cho ),이정화 ( Joung Hwa Lee ),정우진 ( Woo Jin Jeong ),김영돈 ( Young Don Kim ),이상진 ( Sang Jin Lee ),강종원 ( Jong Won Kang ),안재홍 ( Jae Hong Ahn ),강 대한내과학회 2011 대한내과학회지 Vol.80 No.2

목적: 숙변대장염은 대장에 분변이 꽉 채워져 장관 내 압력이 증가되고 이와 관련되어 장벽의 허혈 및 압력 괴사를 초래하여 발생하는 대장염이다. 숙변대장염은 드문 질환으로 예후가 불량하다. 저자들은 숙변대장염의 임상적 특징과 치료 전략에 따른 결과를 알아보고자 한다. 방법: 2004년 1월부터 2009년 8월까지 본원에서 CT검사와 대장내시경 검사를 통해 숙변대장염으로 진단된 11명의 환자를 대상으로 하여 후향적 연구를 하였다. 대상환자들의 임상적 특징을 조사하고 수술적 치료와 보존적인 치료에 따른 임상적 결과를 조사하였다. SIRS, 패혈증 혹은 패혈성 쇼크가 동반된 경우를 중한 숙변대장염이라 정의하였다. 결과: 총 11명의 환자가 포함되었으며 이들 중 3명이 남자였고, 8명은 여자였다. 평균 연령은 70±8세였다. 10명의 환자들은 변비의 유발요인들을 갖고 있는 고령의 환자였다. 저자들의 정의에 의해 9명의 환자가 심한 숙변대장염으로 진단되었고, 이들 중 5명은 수술적인 치료를 받았으며 나머지 4명은 보존적인 치료를 받았다. 수술적 치료를 받은 5명 중 1명(20%)이 사망하였고, 보존적인 치료를 받은 환자(n=4)들은 모두 사망하였다. 결론: 만성 변비의 유발요인을 갖는 고령의 환자가 복통을 호소하고 CT상에서 분변박힘 소견과 함께 대장 벽의 국소적인 비후가 관찰되거나 장 주위 지방침윤이 동반되면 숙변대장 염의 가능성을 고려하여야 한다. 더욱이 환자가 SIRS, 패혈증 혹은 패혈성 쇼크가 합병된 중한 숙변대장염으로 진단된 경우라면 조기의 수술적 치료가 사망률을 감소시킬 것으로 생각된다. Background/Aims: Stercoral colitis is an inflammatory condition related to increased intraluminal pressure, itself caused by impacted fecal material. Stercoral colitis is a rare condition and has a generally poor prognosis. The aims of this study were to investigate the clinical characteristics and outcomes of stercoral colitis according to management strategy. Methods: From January 2004 to August 2009, 11 patients were diagnosed with stercoral colitis at our center. The medical records of these individuals were reviewed retrospectively with regard to the clinical characteristics, management strategy, and clinical outcomes. We defined severe stercoral colitis as stercoral colitis complicated by systemic inflammatory response syndrome, sepsis, or septic shock. Results: Eleven patients (three men and eight women) with a mean age of 70±8 years were included. Ten patients were elderly with constipation as a predisposing factor. Nine patients had severe stercoral colitis according to out criteria. Of these, five patients underwent surgery, and the other four were treated with a conservative management strategy. One patient (20%) in the surgical group and all patients in the conservative management group (n=4) died. Conclusions: Stercoral colitis should be considered in elderly patients with predisposing factors and presents as fecal impaction with colonic wall thickening or pericolic fat stranding on CT scan. In patients with severe stercoral colitis, early surgery may be effective in reducing mortality. (Korean J Med 2011;80:187-192)

Optical Analysis of Self-Assembled InAs/GaAs Quantum Dot Heterostructures Based on Far-Infrared Absorption and Near-Infrared Emission

세경 강,이상준,김문덕,노삼규,최정우 한국물리학회 2003 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.42 No.1

We report some electronic characteristics of a couple of self-assembled InAs/GaAs quantum-dot (QD) heterostructures with sizes of 1.8 and 2.0 monolayers (MLs) fabricated by using the molecular beam epitaxial technique via the Stranski-Krastanow growth mode. Optical analysis of the farinfrared absorption spectra and the near-infrared photoluminescence (PL) emission spectra taken at room temperature has been made in order to determine the energy positions of the sublevels in the QD ensemble. The absorption peak energies (wavelengths) are identied as 90 meV (13.8 m) and 110 meV (11.3 m), and the PL emission peak energies are 1.202 eV and 1.169 eV for 1.8-ML and 2.0-ML QD samples at room temperature, respectively. On the basis of the absorption and the emission spectra, we propose schematic energy-band diagrams for 1.8-ML and 2.0-ML InAs-QD/GaAs heterostructures.