The enhancement of thermal property of polycarbonate film via the incur poration of oriented PET

정민재,전현애,김현아,강소영 한국고분자학회 2010 한국고분자학회 학술대회 연구논문 초록집 Vol.2010 No.4

프로야구선수 수비기여도가 팀 성적에 미치는 영향에 관한 연구

정민재,김용정,양창규 사단법인 한국융합기술연구학회 2022 아시아태평양융합연구교류논문지 Vol.8 No.11

The purpose of this study is to examine the effect of Korean professional baseball players' defensive contribution on position and team performance. In other words, the purpose of this study is to present timely implications for the professional baseball teams and the league by measuring the player's effectiveness considering the defensive contribution of baseball players and examining the relationship between each position and the team performance. To this end, we derived defensive efficiency considering efficiency and defensive contribution from 109 players who played 144 at-bats in the 2019 season. According to the analysis results, (1) the efficiency and defensive efficiency of first base, which is the traditional slugger position, both were low, and the catcher and shortstop had the highest defensive efficiency considering the contribution of defense. (2) The correlation between defensive efficiency and team performance was confirmed, and the top 5 teams with high defensive efficiency ranked in the top 5. As a result of this study, it is necessary for professional baseball teams to secure excellent players that are helpful for team performance by using various efficiency indicators suitable for their position in terms of game operation and player management. In addition, it is necessary to evaluate the value of players through efficiency indicators suitable for the characteristics of the position, suggesting that in order to establish a stable profit structure of the club and to advance the Korean professional baseball league. It is necessary to develop and collect and utilize not only offensive data but also defensive data items. 본 연구는 한국프로야구선수의 수비기여도가 선수효율성과 구단성적에 미치는 영향을 확인하고자 한다. 즉, 야구선수의 수비기여도가 고려된 선수효율성을 측정하고 선수효율성과 구단성적과의 관계를 규명하여 구단과 한국프로야구리그에 시의적절한 시사점을 제시하고자 한다. 이를 위해 2019시즌 144타석을 소화해낸 109명의 선수를 대상으로 연봉과 수비기여도를 고려한 수비효율성을 DEA를 활용하여 도출하였다. DEA 모형의 투입변수로 타격지표와 수비기여도를 선정하였고, 산출변수로 선수연봉을 선정하였다. 분석결과에 따르면 (1) 전통적인 강타자 포지션인 1루수는 효율성과 수비효율성이 모두 낮고, 포수와 유격수는 수비기여도가 고려된 수비효율성이 가장 높았다. (2) 수비효율성과 구단성적과의 상관관계를 확인하였고, 수비효율성이 높은 상위 5개 구단의 성적이 상위 5위를 차지하였다. 이 연구결과는 구단이 경기운영과 선수관리 측면에서 포지션에 맞는 다양한 효율성 지표를 활용하여 구단성적에 도움이 되는 우수한 선수를 확보하거나 포지션에 특성에 맞는 효율성 지표를 통해 선수의 가치를 평가할 필요가 있고, 구단의 안정적인 수익구조 정착과 한국프로야구리그의 선진화를 위해서는 공격측면의 데이터뿐만 아니라 수비측면의 데이터 항목개발 및 수집활용이 필요하다는 점을 시사한다.

전염병, 안전, 국가: 전염병 방역의 역사와 메르스 사태

정민재 역사문제연구소 2015 역사문제연구 Vol.19 No.2

In South Korea, the necessity of epidemic prevention systems such as quarantine came to the fore as concerns about infectious diseases propagated from foreign countries increased when international trading and personal exchanges became active after the port opening. After the beginning of the 19th century, exotic infectious diseases such as the cholera spread causing many fatalities. Because such spreading of infectious diseases made stable securing of human resources required by the state difficult, epidemic prevention projects to prevent the onset and spreading of infectious diseases were implemented not only in the times of Korean Empire but also in the Japanese colonial period. In Europe in the 19th century, opinions that states should reinforce social control functions through administrative means so that people's health and sanitary conditions could be maintained for continuous increases in populations. Therefore, the issues of health hygiene did not stay at the level of individuals but became to be established in the public domain in society. Affected by Europe in the process of modernization, Japan actively accepted the concept of 'Medical Police' of Germany so that the state can efficiently control the occurrence of infectious diseases through c prevention activities conducted by mobilizing medical police. Since the coerciveness of the state power in the process of epidemic prevention activities mobilizing police power was public good for the entire society, society members had to naturally accept it. Such coerciveness became stronger whenever infectious diseases prevailed. In the Japanese colonial period, when any infectious disease had occurred, the police demanded individuals to implement cleaning projects such as disinfection and could punish any individual that would poorly implement the projects. Japanese police could freely access individuals' houses under the title of cleaning inspection and could punish individuals. Through the foregoing, the colonial power could reinforce its control over individuals. The argument that when any infectious disease prevails, the state should take the lead firsthand to control the disease for the subsistence of society still has strong persuasive power even today. Although it is generally known that the risks of acute infectious diseases decreased as the causes of infectious diseases have been identified thanks to the development of bacteriology, what are problematic today are infectious diseases by new viruses such as SARS, novel influenza, and MERS. In that the occurrence of great casualties in the past due to the spreading of new infectious diseases in the times such as the cholera and Spanish influenza brought about increases in social unrest providing the causes of riots in the 19th century and peoples movements. Whereas as the prevalence of infectious diseases is a natural calamity, minimizing the damage should be humans' share, that is, the government's systematic responses. However, as with at times of other accidents, the government failed in initial responses in the recent MERS situation. As the government delayed the disclosure of information and improperly predicted the progress of the MERS situation, the people had to feel great confusion and anxiety. In the process, people that suffered from the fear of infection as MERS spread stigmatize MERS patients as 'criminals against society' instead of victims to blame them. Now when MERS is expected to be terminated soon in South Korea, what we should yet do is establish measures to prevent recurrence of similar situations. As the medical police system in the modern times could not be a fundamental solution for infectious diseases, to be prepared to the future, more systematic epidemic prevention systems than those of now should be established even if great amounts of time and budgets would be required.

일제강점기 順化院의 설립과 운용

정민재 한국근현대사학회 2011 한국 근현대사 연구 Vol.57 No.-

Sunhwaweon(順化院) is a representative hospital specialized in treating infectious diseases that was established and operated during the Japanese colonial rule. Sunhwaweon that had been set up after a cholera epidemic in 1909 was an infirmary that received patients with infectious diseases by priority before being turned into a representative hospital specialized in treating epidemics during the Japanese colonial rule and a hospital specialized in treating tuberculosis patients after the liberation of Korea from the Japanese colonial rule. When cholera was running rampant in 1909, Hanseong(漢城) was hit the hardest, and Hanseongwisaenghoe (漢城衛生會) found it necessary to establish a well-equipped infirmary that could accommodate Koreans and the Japanese. Accordingly, construction of a hospital was initiated in 1910, and it was completed in July 1911. The infirmary was named Sunhwaweon after its location and capable of accommodating about 100 patients. When Sunhwaweon was established, it aimed to accommodate and treat patients with infectious diseases that occurred within Gyeongseongbu(京城府). Those who lived outside Gyeongseongbu were allowed to be admitted if they wanted, but discriminating hospital bills were applied to them. As it was established to treat both Korean and Japanese patients with infectious diseases from the beginning, the two peoples were accommodated together. As Sunhwaweon was a Gyeongseong’s representative hospital specialized in treating infectious diseases during the Japanese colonial rule, patients with various epidemics were accommodated. If epidemics were running rampant, the hospital was forced to accommodate patients beyond its capacity, so many argued for expanding the hospital. If one takes a close look at the foundation and activity of Sunhwaweon, he or she can easily figure out the current state of infectious diseases in Korea during the Japanese colonial rule and after the liberation of Korea from the Japanese colonial rule in addition to governmental medical policy by period. Japan took preventive measures against epidemics by mobilizing the military and the police during the Residency-General(統監府) Period and the Government-General(總督府) Period. The preventive measures against epidemics that were taken after 1905 indicated some sort of modernity when a specialized infirmary was established and quarantine was conducted based on laws and regulations on the surface. However, legislation of laws and establishment of systems under a particular circumstance characterized by the Japanese colonial rule led the colonial power to control and suppress the public resulting in compliant Koreans during the Japanese colonial rule. Sunhwaweon(順化院) is a representative hospital specialized in treating infectious diseases that was established and operated during the Japanese colonial rule. Sunhwaweon that had been set up after a cholera epidemic in 1909 was an infirmary that received patients with infectious diseases by priority before being turned into a representative hospital specialized in treating epidemics during the Japanese colonial rule and a hospital specialized in treating tuberculosis patients after the liberation of Korea from the Japanese colonial rule. When cholera was running rampant in 1909, Hanseong(漢城) was hit the hardest, and Hanseongwisaenghoe (漢城衛生會) found it necessary to establish a well-equipped infirmary that could accommodate Koreans and the Japanese. Accordingly, construction of a hospital was initiated in 1910, and it was completed in July 1911. The infirmary was named Sunhwaweon after its location and capable of accommodating about 100 patients. When Sunhwaweon was established, it aimed to accommodate and treat patients with infectious diseases that occurred within Gyeongseongbu(京城府). Those who lived outside Gyeongseongbu were allowed to be admitted if they wanted, but discriminating hospital bills were applied to them. As it was established to treat both Korean and Japanese patients with infectious diseases from the beginning, the two peoples were accommodated together. As Sunhwaweon was a Gyeongseong’s representative hospital specialized in treating infectious diseases during the Japanese colonial rule, patients with various epidemics were accommodated. If epidemics were running rampant, the hospital was forced to accommodate patients beyond its capacity, so many argued for expanding the hospital. If one takes a close look at the foundation and activity of Sunhwaweon, he or she can easily figure out the current state of infectious diseases in Korea during the Japanese colonial rule and after the liberation of Korea from the Japanese colonial rule in addition to governmental medical policy by period. Japan took preventive measures against epidemics by mobilizing the military and the police during the Residency-General(統監府) Period and the Government-General(總督府) Period. The preventive measures against epidemics that were taken after 1905 indicated some sort of modernity when a specialized infirmary was established and quarantine was conducted based on laws and regulations on the surface. However, legislation of laws and establishment of systems under a particular circumstance characterized by the Japanese colonial rule led the colonial power to control and suppress the public resulting in compliant Koreans during the Japanese colonial rule.

의학으로 시대의 흐름을 읽는다 -재컬린 더핀 저, 신좌섭 역, 『의학의 역사: 한권으로 읽는 서양의학의 역사』,사이언스북스, 2006-

정민재 연세대학교 의과대학 의사학과 2008 연세의사학 Vol.11 No.1

Temperature-dependent performance of the erasure machine

정민재,김범준 한국물리학회 2022 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.80 No.9

Interaction strengths in spin systems can be estimated from the maximum likelihood estimate (MLE) method based on information of spin configurations. The application of the standard MLE method has been known to face serious problems for large data sets since it demands huge computation cost. We test the performance of the erasure machine, which has been recently proposed to overcome such drawbacks of MLE, for the Sherrington–Kirkpatrick model and two-dimensional Ising model. In this paper, we focus on how the performance of the erasure machine varies with the temperature and find that it exhibits the best performance not at criticality, but at somewhat higher temperature. We also attempt to explain such temperature-dependent performance of the erasure machine.

Unbalanced magnetron을 이용한 Titanium Nitride 박막합성에 관한 연구

정민재,김용모,이호영,한전건 한국진공학회 2001 한국진공학회 학술발표회초록집 Vol.- No.-

나노소자 식각을 위한 low angle forward reflected neutral beam에서의 reflector 효과

정민재,이도행,배정운,염근영 한국진공학회 2001 한국진공학회 학술발표회초록집 Vol.- No.-

TAP을 이용한 광흡수계수 측정에서의 보정방법과 불확실성에 대한 고찰

정민재,이충훈,유희정,오상민,이선란,김정은,부경온 한국대기환경학회 2022 한국대기환경학회 학술대회논문집 Vol.2022 No.10

The effect of chemical interaction on the thermal expansion behavior of polymer composite

정민재,전현애,조을룡,김현아,강소영,최경호,박인,이상국,김기현,김영준 한국고분자학회 2009 한국고분자학회 학술대회 연구논문 초록집 Vol.2009 No.4