스마트환경에서의 장애인 정보화 지수 개발 연구

전우찬 인문사회과학기술융합학회 2016 예술인문사회융합멀티미디어논문지 Vol.6 No.2

특허 소송에서 빅데이터 분석의 활용

전우찬 서울대학교 기술과법센터 2021 Law & technology Vol.17 No.2

우리나라에서 빅데이터 분석 기술과 특허 소송에서 활용 가능한 지식재산 서비스 또는 법률 서비스 사이의 격차를 줄이기 위한 방안을 제안하였다. 지식재산 서비스에서 국내 기업은 해외 기업과 비교하여 데이터의 양과 질적인 측면에서 열세에 있으므로 국내의 지식재산 서비스를 제공하는 기업들은 데이터에 대한 정보처리 기술을 고도화하여 경쟁력을 확보할 필요가 있다. 또한 특허 빅데이터 분석 기법에 관한 다양한 연구를 활용할 수 있는 알고리즘과 데이터를 오픈소스 방식으로 공개할 수 있는 플랫폼을 제공하여 연구결과의 활용성을 강화할 필요가 있다. 지식재산 서비스의 활용도를 높이기 위해서는 데이터와 알고리즘에 대한 객관성과 투명성이 확보되어야 할 것이다. 법률 서비스에서는 법률산업 선진화와 신성장 동력 발굴 차원에서 리걸테크 산업을 육성하기 위한 산업투자 및 기반 확충에 나서야 한다. 또한 적정한 수준의 비식별화가 이루어진 판결문에 대해서는 연구자들이 손쉽게 접근할 수 있는 데이터베이스 구축이 필요하다. 우리나라는 영미법과 달리 디스커버리 제도가 존재하지 않고 기본적으로 성문법주의를 채택하고 있는 점을 감안하여 판결문 검색을 위한 공공 서비스 등 우리나라 제도에 필요한 부분에 집중할 필요가 있다. 현행 변호사법에 따라 비변호사가 빅데이터 분석 기술을 활용하여 유상으로 고객들을 상대로 법률사무를 취급하는 것은 금지된다. 그러나 변호사법 제109조 제1호의 궁극적인 목적이 일반 국민을 보호하기 위한 것임을 고려했을 때 적어도 알고리즘의 투명성과 데이터의 객관성이 확보되는 것을 전제로 변호사가 아닌 개인 또는 기업이 빅데이터 분석 기술을 활용해 법률 서비스를 제공하는 것을 일부 허용할 필요가 있으며 변리사 법에 의한 규제도 마찬가지의 고민이 필요하다. In Korea, a plan to reduce the gap between big data analytics technology and IP services or legal services that can be used in patent litigation was proposed. In IP services, domestic companies are inferior in terms of data volume and quality compared to foreign companies, so domestic companies that provide IP services need to enhance information processing technology for data to secure competitiveness. In addition, it is necessary to enhance the utilization of research results by providing a platform to disclose algorithms and data in an open-source manner that can utilize various research on patent big data analytics techniques. In order to increase the utilization of IP services, objectivity and transparency in data and algorithms will need to be secured. In legal services, industrial investment and infrastructure expansion to foster the legal tech industry must be initiated in order to advance the legal industry and discover new growth engines. In addition, it is necessary to establish a database that researchers can easily access for judgments that have been de-identified at an appropriate level. Considering that unlike the Anglo-American law, Korea does not have a Discovery system and basically adopts written law, it is necessary to focus on what is needed for the Korean system, such as public services to search for retrieving judgments. Under the current Lawyer Act, non-lawyers are prohibited from using big data analytics technology to deal with legal affairs with clients for a fee. However, considering that the ultimate purpose of Article 109 (1) of the Attorney-At-Law Act is to protect the general public, it is necessary to allow individuals or companies other than lawyers use big data analytics technology to provide legal services on the premise that at least transparency of algorithms and objectivity of data are secured. In addition the same needs to be considered for regulation under the Patent Attorneys Act.

척추기저동맥박리에서 다중검출기 컴퓨터단층혈관촬영의 유용성

전우찬,민영기,배영신,이국종 대한응급의학회 2006 대한응급의학회지 Vol.17 No.6

Purpose: Vertebral and basilar artery dissection (VBAD) is difficult to diagnose by conventional computed tomography. However, Multi-detector computed tomography (MDCT) angiography is not only a less invasive diagnostic technique than conventional angiography but also provides high quality images. We assessed clinical manifestations and usefulness of MDCT angiography in VBAD. Methods: We retrospectively reviewed clinical manifestations, magnetic resonance angiography (MRA) and MDCT angiographic findings of 29 patients who were diagnosed with VBAD by conventional angiography from January 2001 to December 2004. A radiologist reviewed MRA, MDCT axial source images, and three dimensional angiography. Results: The mean patient age was 45.9±10.2 years. and 23 (79.3%) patients were less than 55 years old. Eight patients had precipitating factors such as trauma, hyperextension and sports activity. Nineteen patients out of 29 presented with neurological symptoms such as sensory change, dysarthria, ataxia and cerebellar dysfunction. The remaining 10 patients exhibited only nonspecific symptoms such as headache, neck pain and dizziness. Among 19 VBAD patients tested by MRA, 13 patients had positive radiological findings. and 16 of 17 patients evaluated MDCT angiography had positive radiological findings. Therefore, the sensitivities of MRA and MDCT angiography in diagnosing VBAD were 68.4% and 94.1%, respectively. Conclusion: VBAD is a cause of stroke at young age. The patients with VBAD may have precipitating factors and can present with nonspecific symptoms without any neurological deficit. MDCT angiography is suitable for use as a rapid diagnostic tool for VBAD.

금융연구(金融硏究) : 국내 은행에 있어 스톡옵션 부여가 경영 효율성에 미치는 효과

전우찬 ( Woo Chan Jeon ),선우석호 ( Suk Ho Sonu ) 한국금융학회 2012 금융연구 Vol.26 No.4

논문 : 스톡옵션과 CEO의 위험조정

전우찬 ( Woo Chan Jeon ),선우석호 ( Suk Ho Sonu ) 명지대학교 금융지식연구소 2013 금융지식연구 Vol.11 No.3

스톡옵션 제도는 경영자에 의한 대리인문제를 제거하기 위해 고안된 혁신적인 제도이다. 80년대 이후 전 세계적으로 활발하게 운용되어온 이 제도가 주주 이익보다는 도리어 경영인에 과다한 보수를 지불하게 함으로써 주주 가치를 훼손한다는 비판을 받고 있다. 특히 금융 산업의 경우 대량의 스톡옵션을 부여받은 경영자들이 과도하게 위험을 추구하도록 부추겼고 이것이 2008년의 미국발 금융위기를 촉발한 주요 원인이라는 분석도 제기되었다. 우리나라의 경우 이 제도의 부정적인 효과에 대한 학술적 분석도 미흡한 상태에서 대부분의 은행들은 그동안 활용해오던 스톡옵션 제도를 단기간에 폐지한 바 있다. 본 연구는 국내은행에 있어 스톡옵션의 부여가 은행의 소유구조 특성에 따라 은행장의 위험선택에 어떤 변화를 가져왔는지 분석한다. 저자들은 대주주 지분이 높고 외국인 지분이 낮은 집중형 은행들의 경우 대주주의 영향을 받는 경영자는 대주주이익의 극대화를 위해 과도한 위험을 선택하도록 요구 받는 반면, 대주주 지분이 낮고 외국인 지분이 높은 분산형 은행들의 경우 경영자의 참호효과추구로 인해 경영자가 과소한 위험을 선택한다고 보았다. 이러한 전제아래 경영자에게 스톡옵션이 부여되면 경영진이 주가극대화를 위해 적정 수준의 위험을 선택하는 지 분석하였다. 즉, 집중형 은행의 경우 위험을 하향조정하는지, 분산형 은행의 경우 위험을 상향 조정하는 지를 분석하였다. 위험지표로는 BIS 비율로, 위험수준의 변화로는 스톡옵션 수량 변화 후 1년 동안 변화된 BIS 비율로 추정하였다. 2000년 1분기부터 2009년 4분기까지 10개 은행의 은행장에게 부여된 스톡옵션 자료와 분기별 재무정보를 이용하여 분석한 결과, 집중형 은행의 경우 스톡옵션 부여수량이 증가할수록 위험수준이 낮아지는 방향으로 조정이 이뤄진 반면, 분산형 은행의 경우 스톡옵션 부여수량이 증가할수록 위험수준이 높아지는 방향으로 조정이 이뤄졌다. 이러한 결과는 스톡옵션 제도가 은행장으로 하여금 기업가치 제고를 위해 적절한 위험수준으로 위험을 조정하는데 영향을 끼쳤음을 보여주었다. 이 같은 본 연구의 결과는 스톡옵션 제도의 위험조정과 관련한 새로운 증거를 보여주고 있으며 향후 최고 경영진의 보상체계를 설계하는 데에 도움이 될 것으로 보인다. The stock option plan is known to be the outcome of innovative ideas in reducing managers` agency problems. Since the 1980s, this plan has been widely adopted by many corporations all over the world. But after Enrol scandal, it becomes controversial as the public and some of opinion leaders start to criticize the plan. They insisted that the plan hurts shareholders` interests by giving unfair reward to the unethical managers. The negative attitudes towards the plan has exploded during financial crisis of 2008, as the top managers in many of financial industries took enormous amount of benefits from the stock option plan by taking excessive risks and inducing bankruptcy to the companies he had worked for. Coincidently, most banks in Korea, which have adopted the plan until that time, quit it together in a short period of time, without adequate analysis on the negative side of that plan. Since the contents of the plan as well as the business environment were quite different from the U.S., the anonymous decision looks abrupt and even irrational. In this study, we analyze the amount stock options granted to banks` CEOs affect them in deciding the level of risk measured by BIS ratios. And we tested whether the level of risk chosen is aligned with stock value. For this study, banks are categorized into two groups; the concentrated and the distributed, depending on the existence of large shareholders and the percentage of share holdings by foreign investors. We assume that managers of the concentrated bank, owned by large shareholders with low level of foreign investors` holdings, have incentive to have higher risk to utilize option value embodied in stocks which may ultimately reduce the corporate value. And we assume that managers of the distributed bank, not owned by large shareholders with high level of foreign investors` holdings, have incentive to have lower risk to safeguard his position which also reduces the corporate value. Then we test whether the stock options, granted to managers, induce them to select optimal level of risk in line with the corporate value in the long run. We used quarterly BIS ratios and the stock options granted to the CEOs of the 10 Korean banks during 2000-2009. We find that, with statistical significance, the increase in stock options granted to CEOs of the centralized bank reduce the risk level, while the increase in stock options granted to CEOs of the distributed banks raise the risk level. This result coincides with the directions as we expected in the hypothesis. The evidence found here may explain that motivating CEOs by stock option plan works well in Korea. It also imply that this equity plan is still a valid incentive instrument to increase corporate value by reducing various types of agency costs.

WLAN에서 주기적인 AP 채널 스위칭에 의한 이동성 지원 연구

전우찬(Youchan Jeon),김명유(Myeongyu Kim),박진우(Jinwoo Park) 한국통신학회 2009 한국통신학회 학술대회논문집 Vol.2009 No.11

국내 응급 센터의 뱀교상 환자의 특징: 국가응급의료정보망

이세록,전우찬 대한임상독성학회 2022 대한임상독성학회지 Vol.20 No.2

Purpose: This study utilizes the NEDIS (National Emergency Department Information System) database to suggest a predictive model for snakebite and envenomation in Korea by analyzing the geographical distribution and seasonal variation of snakebite patients visiting the ER. Methods: This was a retrospective study on snakebite patients visiting the ER using the NEDIS database from January 2014 to December 2019. The subjects include patients with the KCD (Korea Standard Classification of Disease) disease code T63.0 (Toxic effect of contact with snake venom). Geographical location, patient gender, patient age, date of ER visit, treatment during the ER stay, and disposition were recorded to analyze the geographical distribution and seasonal variation of snakebite patients in Korea. Results: A total of 12,521 patients were evaluated in this study (7,170 males, 54.9%; 5,351 females, 40.9%). The average age was 58.5±17.5 years. In all, 7,644 patients were admitted with an average admission time of 5.04±4.7 days, and 2 patients expired while admitted. The geographical distribution was Gyeongsang 3,370 (26.9%), Cheonra 2,692 (21.5%), Chungcheong 2,667 (21.3%), Seoul Capital area 1,999 (16.0%), Kangwon 1,457 (11.6%), and Jeju 336 (2.7%). The seasonal variation showed insignificant incidences in winter and higher severity in spring and summer than in fall: winter 27 (0.2%), spring 2,268 (18.1%), summer 6,847 (54.7%), and fall 3,380 (27.0%). Conclusion: Patients presenting with snakebites and envenomation in the emergency room were most common in the Gyeongsang area and during summer. The simple seasonal model predicted that 436 snakebites and 438 envenomation cases occurred in July and August. The results of this study can be applied to suitably distribute and stock antivenom. Appropriate policies can be formed to care for snakebite patients in Korea.

두꺼비독 중독 2례

권정훈,전우찬,정윤석,안정환,Kwon Cheong-Hoon,Jun Woo-Chan,Jung Yoon-Suk,Ahn Jung-Hwan 대한임상독성학회 2006 대한임상독성학회지 Vol.4 No.1

The venom gland of Toad contains large quantities of cardiac glycosides, and toad venom poisoning is similar to digitalis toxicity and carries a high mortality. Sometimes after ingestion of aphrodisiac pills which contain dried toad, a patient develops gastrointestinal symptoms and bradycardia, psychoneurologic symptoms. We have experienced 2 cases of toad venom intoxication, who ingested asian toads. Patients were presented to our ED with nausea, vomiting, and abdominal pain. The patients were peformed monitoring and conservative treatment and were fully recovered. Toad venom intoxication should be considered in patients with clinical manifestation of gastrointestinal irritation, cardiac arrhythmias, hyperkalemia, and detectable serum digoxin level without current medication of digoxin.

응급실을 경유하여 입원한 자살시도자들의 분석 -정신병력, 자살시도력 및 정신과적 진단을 중심으로-

허재민,전우찬,민영기,정윤석,Hur Jae Min,Chun Woo Chan,Min Young Gi,Jung Yoon Seok 대한임상독성학회 2004 대한임상독성학회지 Vol.2 No.2

Purpose: This study analyzed the general features, psychiatric histories, past suicidal attempts and psychiatric diagnoses of suicide victims admitted via the emergency department (ED). Methods: Reviewing the charts of 138 inpatients of suicide attempts admitted via the ED from January 2002 to December 2003, we analyzed various data, including sex, age, season, stressful events, psychiatric histories, previous suicidal attempts, and psychiatric diagnoses during admission, and we used a chi-square test to chart the statistical data. Results: A significant difference was found between 1 st attempts and repeated attempts as to the mechanical methods used for the suicide attempts, There was a significant difference in the kinds of drugs between patients with and without psychiatric histories. In the psychiatric diagnosis, there was a significant difference in AXIS I between patients with and without psychiatric histories. In AXIS II, there was a significant difference between patients with and without psychiatric histories, 1st attempts and repeated attempts. Conclusion: We emphasize the importance of psychiatric consults, treatments, and follow-ups for suicide victims and the emergency physicians' function in helping them to contact psychiatric doctors.

Comparison of the Risk Stratification Tools Including the Blatchford Score and the Clinical Rockall for Nonvariceal Upper Gastrointestinal Bleeding in the Emergency Department

이한유,전우찬,김경환,박준민,김현중,박준석,신동운,김훈 대한응급의학회 2014 大韓應急醫學會誌 Vol.25 No.5

Purpose: Upper gastrointestinal bleeding (UGIB) is a commonmedical emergency condition in the emergencydepartment (ED). Patients with UGIB show a wide range ofclinical severity, from mild bleeding to death. The objectiveof this study was to evaluate methods for risk stratificationof active UGIB in the ED. Methods: We retrospectively reviewed patients with UGIBwho were admitted to the ED of a tertiary care, universityaffiliatedhospital center from January 2011 to December2011. Our study subjects were patients over 20 years oldwho complained of symptoms and signs of gastrointestinaltract bleeding and underwent endoscopic gastroduodenoscopy(EGD) evaluation. However, patients diagnosedwith variceal gastrointestinal bleeding, disseminated malignancy,coagulopathy, and lower gastrointestinal bleedingand patients who did not undergo EGD within 6 hours wereexcluded. The Blatchford score and the clinical Rockallscore were calculated for the enrolled patients. In caseswhere the value of each score was greater than 0, thescores were considered high risk. Active UGIB was definedas a symptom of patients who underwent emergency endoscopicintervention such as ligation or sclerotherapy. Wecompared the proportions of patients identified as high riskusing chi tests. The areas under the receiver operating characteristic(AUROC) curve for detection of patients requiringemergency endoscopic intervention were calculated for boththe Blatchford score and the clinical Rockall score. Results: The numbers of patients with high risk accordingto the Blatchford score and the clinical Rockall were 220(93.6%) and 192 (81.7%) of 235 patients, respectively. Thenumber of patients with active UGIB was 96 (40.9%) of 235patients. The sensitivity and specificity of risk stratificationbased on the Blatchford score was 100% (96/96) and 10.8%(15/139) (p=0.001), respectively, while those based on theclinical Rockall score were 80.2% (77/96) and 17.3%(24/139) (p>0.05). The AUROC curves of the Blatchfordscore and the clinical Rockall score were 0.617 (95% CI;0.546-0.688) and 0.495 (95% CI; 0.420-0.571), respectively. Conclusion: The Blatchford score could be more useful as arisk stratification tool than the clinical Rockall score for activeUGIB patients in the ED. The Blatchford score would bepreferable as a clinical tool that can discriminate patients whoneed emergency endoscopic intervention for control of UGIB.