중수도 개발방안 연구

박중현 대한상하수도학회 1987 상하수도학회지 Vol.1 No.-

원발성 항문직장 흑색종 3예

박중현,이상권,오승택,김세경,김인철 대한대장항문학회 2000 Annals of Coloproctolgy Vol.16 No.1

How Respiratory Muscle Strength Correlates with Cough Capacity in Patients with Respiratory Muscle Weakness

박중현,이상철,최원아,김동현,강성웅 연세대학교의과대학 2010 Yonsei medical journal Vol.51 No.3

Purpose: The purpose of this study is to investigate how respiratory muscle strength correlates to cough capacity in patients with respiratory muscle weakness. Materials and Methods: Forty-five patients with amyotrophic lateral sclerosis (ALS), 43 with cervical spinal cord injury (SCI), and 42 with Duchenne muscular dystrophy (DMD) were recruited. Pulmonary function tests including forced vital capacity (FVC) and respiratory muscle strength (maximal expiratory pressure, MEP;maximal inspiratory pressure, MIP) were performed. The correlation between respiratory muscle strength and cough capacity was analyzed. Results: In the SCI group, FVC in a supine position (2,597 ± 648 mL) was significantly higher than FVC in a sitting position (2,304 ± 564 mL, p < 0.01). Conversely, in the ALS group, FVC sitting (1,370 ± 604 mL) was significantly higher than in supine (1,168± 599 mL, p < 0.01). In the DMD group, there was no statistically significant difference between FVC while sitting (1,342 ± 506 mL) and FVC while supine (1,304 ± 500 mL). In addition, the MEP and MIP of all three groups showed a significant correlation with peak cough flow (PCF) (p < 0.01, Pearson’s correlation analysis). In the SCI group, MIP was more closely correlated with PCF, while in the ALS and DMD groups, MEP was more closely correlated with PCF (p < 0.01,multiple regression analysis). Conclusion: To generate cough flow, inspiratory muscle strength is significantly more important for SCI patients, while expiratory muscle function is significantly more important for ALS and DMD patients.

미국 동포 어린이에게!

박중현 한국국어교육학회 1999 세계가 한동네 Vol.1999 No.-

광역 상수도의 개발방향과 수도요금의 현실화 문제

박중현,Park, Jung-Hyeon 한국상하수도협회 1981 水道 Vol.24 No.-

SPECIAL ISSUES-보령화력 1,2호기 터빈 성능개선 방향

박중현,Park, Jung-Hyeon 대한전기협회 2006 전기저널 Vol.- No.360

능동 서스펜션 장치에의 대칭제어시스템 적용에 관한 연구

박중현,김순호 한국정보통신학회 2006 한국정보통신학회논문지 Vol.10 No.5

This paper proposed a theoretic numerical modelling in control system design to analyze active suspension equipment by adopting minimum phase system theory. Recent in the field of suspension system design it is general to adopt active control scheme for stiffness and damping, and connection with other vehicle stability control equipment is also intricate, it is required for control system scheme to design more robust, higher response and precision control equipment. Transfer matrices of system with collocated sensors and actuators are symmetric. The symmetry is independent of the entities of mass, damping, or stiffness matrices, and is a non parametric nature. From this point of view, symmetric robust control system is analyzed and designed in this paper. Numerical example is shown for validity of robust control system design. 본 논문에서는 능동현가장치의 해석 및 설계에 최소위상시스템개념을 적용하여 제어시스템설계에 응용 할 수 있는 이론적 수식모델링에 관한 연구를 수행하였다. 최근의 현가장치설계에서는 강성과 댐핑을 능동적으로 제어하는 기술의 적용이 일반화 되고 있으며, 다른 차량안정성제어장치와의 연계성이 높아짐에 따라, 제어시스템설계에서 보다 내구성이강하고 제어효과의 응답성이 빠르며 정도 또한 높은 제어장치의 필요성이 요구되고 있다. 본 연구는 센서와 액츄에이터의 위치관계에 따른 능동현가장치의 위상시스템을 해석하여 위와 같은 빠른 응답성과 높은 정도의 제어가 가능한 제어시스템을 해석, 설계하기 위하여 제어장치의 대칭성에관한 해석을 하였다. 그리고 대칭인 대상시스템에 관한 대칭 제어시스템을 설계하기위한 모델링 및 적용방법을 수식적으로 해석하였으며, 현가장치의 제어시스템설계에 중요한 내외란성 향상을 위한 강인제어시스템설계에 적용하는 방법에 관해 고찰하였다.

공동 교과서를 통해 본 대화와 갈등

박중현 한국역사교육학회 2007 역사교육연구 Vol.- No.6

The Liberal Democratic Party, then in power, attempted, during a school textbook screening conducted in 1982, to purge history textbooks used in Japanese schools of all references to Japan's war crimes such as its invasion and illegal occupation of Asian countries, and atrocities like the Nanking Massacre. This move sparked violent protests from Korea and China, and even elicited domestic criticism. Another of its consequences was a heightened interest in history education and history textbooks. As a consequence, several research projects on history textbooks were launched also around this time, by groups of historians and educators who saw history education, both in Korea and Japan, as crucial for redressing historical fallacies and misconceptions The association's research was initially focused on determining the level of mutual understanding among Korean and Japanese students and the general public. The focus later shifted toward in-depth analysis of history textbooks of the two countries and research in historiographical methods. In other words, the exchange between the two countries, initially human in nature, soon led to a dialogue on history education and history textbooks. The history dialogue, begun in 2001, resulted in a series of common textbooks published between 2005 and 2007, including 『Choson T' ongshinsa』 (Hangil, 2005), 『A History for the Future』 (Hankyore, 2005), 『The History of Korea and Japan: Through the Looking Glass』 (Sakyejul, 2006), and 『The History of Exchange between Korea and Japan』 (Hyean, 2007). Writing common textbooks from the viewpoint of an East Asian citizen is not an easy wager. Yet, school textbooks provide a tremendous channel for an East Asian dialogue, whose potential for facilitating regional communication can be overlooked only at the cost of seriously delaying the progress in easing the tension between Korea and Japan and achieving peace in East Asia. The potential rewards as well as stakes are too big to not try to exploit this channel, taking the excuse of political situations or the differences between Europe and East Asia. The textbook dialogue will reveal concrete differences between the two countries in their view of history and point to solutions to bridge them. Needless to say, bridging the gap of historical perception will have enormously positive effects on the effort toward reconciliation of the two countries. The gap of perception, however, remains quite huge for the moment, and the level of awareness in the two countries is poor, both in the political class and the general public. Meanwhile, this project to reduce tension in East Asia through common history textbooks is a wholly private-sector initiative, without government involvement. 최근 ‘동아시아사’ 교육과정이 개발되면서, 역사는 물론 사회 다방면에서 ‘동아시아’에 대한 관심이 지대하다. 지리적 접근에서만 아닌 역사적 공동체로서의 인식도 활발해지고 있다. 일본의 역사교과서 왜곡에 이어, 중국의 소위 ‘동북공정’은 21세기를 역사 분쟁으로 몰아가고 있다. 최근에는 중국 함대의 일본 방문을 두고 중ㆍ일 간의 ‘신데탕트‘를 말하기도 한다. 동아시아 각 국의 역사 인식은 전통적 중화관에서 개항 이후 제국주의 침략을 계기로 바뀌게 되었다. 즉 일본의 침략과 수탈에 대한 저항관으로 바뀌었던 것이다. 이러한 역사인식이 중첩되면서 현재에도 삼국의 역사인식은 상당부분 대립하고 있다. 그럼에도 역사인식의 대립이 지속되는 한 동아시아 공존은 기대할 수 없다는 인식 아래 역사 대화에 이어 90년대 중반 이후 공동 교과서 제작을 위한 대화가 지속되었다. 그 결과 짧은 시기에도 불구하고 몇 권의 공동 교과서가 출현되기에 이르렀다. 공동 교과서의 집필자들은 같은 방향성을 갖고 있었음에도 불구하고, 인식 차이에서 나타나는 갈등이 있었다. 그러한 것은 일부 해소되기도 하였고, 적절한 타협점을 찾기도 하면서 인식의 차이를 극복하려는 형태로 진행되었다. 자국 중심주의적 입장에서 보면 흡족치 않을 지도 모르는 공동교과서들의 대화 과정을 살펴보는 것은 21세기 역사 교육이 동아시아 사회에서 어떻게 진행되어가야 하는 지에 대한 하나의 단서를 제공해 줄 수 있을 것이다.

인공지능 기반 기업 부도예측 모델 실증 연구-시간적 특성을 반영한 개선을 중심으로

박중현,김경영,정경민,이현,최희정 한국IT정책경영학회 2023 한국IT정책경영학회 논문지 Vol.15 No.2

As credit risk has been pointed out as a major cause of financial crises in the past, the methodology for preemptively predicting corporate insolvency has been steadily developed. Recently, research has been actively conducted to identify the relationship between bankruptcy itself and financial information through machine learning and predict bankruptcy based on this, but over-sampling or under-sampling is required in that bankruptcy is rare compared to normal companies, which is likely to cause information distortion. In this study, considering these problems, time characteristics are reflected in the artificial intelligence-based bankruptcy prediction model using machine learning and deep learning techniques, and a highly reliable and accurate bankruptcy prediction model is proposed through the artificial intelligence model evaluation index F1 Score.

특집 : 음료수 소독 방법과 세균 및 THM 대책

박중현,이석헌 대한상하수도학회 1993 상하수도학회지 Vol.6 No.2