비선형 단순 모델을 이용한 차량 안정성 해석

고영은(Young Eun Ko),송철기(Chul Ki Song) 한국자동차공학회 2008 한국 자동차공학회논문집 Vol.16 No.4

Vehicle stability is a very important subject in vehicle design and control, because vehicle safety is closely dependent upon its dynamic stability. For the vehicle stability analysis, the nonlinear vehicle model of a mid-size car with three DOF - longitudinal, lateral and yaw - is employed. A rigorous method is used to determine the vehicle stability region in plane motion. An algorithm is used to materialize a topology theorem, which enables to find the exact stability region. A stability criterion for the critical cornering is proposed.

중국의 중의학적 심조항도(心阻抗圖) 연구 동향

고영일 ( Young-il Ko ),이현수 ( Hyon-soo Lee ),박영재 ( Yong-jae Park ),박영배 ( Young-bae Park ) 대한한의진단학회 2008 大韓韓醫診斷學會誌 Vol.12 No.1

Object : The purpose of this study is to the review recent 20 years chinese achievements on the use of impedance cardiography for chinese medicine. Methods : From the China Journal Full Text Database we searched papers on the use of impedance cardiography for chinese medicine by the keyword "心阻抗圖". Results : The researches are summarized into 3 parts. (1) the researches on the relationship between the parameters of impedance cardiography and the chinese medical diagnoses; pulse diagnosis and tongue inspection. (2) the researches on the objective assessment using impedance cardiography for the effects of chinese medical therapy. (3) the researches on the objective evaluation index of Heart Deficiency Syndrome using impedance cardiography. Conclusion : The parameters of impedance cardiography has been established for its usefulness in various chinese medical researches.

호흡 제어에 따른 임피던스 심장도와 지첨용적맥파에 관한 연구

고영일 ( Young-il Ko ),박영배 ( Young-bae Park ),박영재 ( Young-jae Park ),이현수 ( Hyon-soo Lee ) 대한한의진단학회 2007 大韓韓醫診斷學會誌 Vol.11 No.1

Purpose: We performed this study to examine the effect of controlled respiration on cardiovascular system in healthy adult subjects using impedance cardiography and photo-plethysmography. Materials and Methods: This study had performed on 74 subjects, which were healthy men and women without a experience of respiration practice. Using the instruments for impedance cardiography and photoplethysmography, parameters of each subject had been measured after each controlled respirations which were natural respiration, controlled natural respiration (I:E=1.1.6), longer inspiration(I:E=3:3), and longer expiration(I:E=2:4). The measured parameters of impedance cardiography and photoplethysmography were processed statistically by one-way repeated ANOVA. Results: 1. HR and CI of impedance cardiography were decreased significantly during controlled respiration comparing with the result of basal state(the state of enough break). There was no significant difference among the results of controlled respiration. 2. PEP of impedance cardiography had no significant difference among the result of basal state and the results of controlled respiration(p=0.059). 3. VI of impedance cardiography had significant differences among the result of basal state and the results of controlled respiration, and decreased continuously through the controlled respiration. 4. b/a of photoplethysmography had no significant difference among the result of basal state and the results of controlled respiration(p=0.554). 5. c/a of photoplethysmography were decreased significantly during controlled respiration comparing with the result of basal state. There was no significant difference among the results of controlled respiration. 6. d/a of photoplethysmography had significant differences among the results of the controlled respiration decreasing continuously through the controlled respiration and had no significant difference between the result of basal state and the result of natural respiration. 7. AGI of photoplethysmography had significant differences among the result of basal state and the results of the controlled respiration increasing continuously through the controlled respiration. Conclusion: We had examined the effects of controlled respirations on cardiovascular system in multiple points of view. The effects of controlled respirations on cardiovascular system can`t be explained in a simple way, as the cardiovascular system is controlled by many factors. Therefore, more physiological parameters must be measured in the future study on the effect of the controlled respiration on human cardiovascular system.

NC/Nga 마우스에서 향나무 심재 추출물의 아토피 피부염 개선 효과

고영은(Young Eun Ko),남기연(Ki Yeon Nam),이정순(Jung Soon Lee),이선영(Sun Yung LY) 한국생활과학회 2012 한국생활과학회 학술대회 Vol.2012 No.11

투키디데스 함정의 국제질서에서 한반도 비핵화와 평화정착 가능성 모색 - Graham Allison 이론을 중심으로

고영은(KO Young-Eun) 장로회신학대학교 기독교사상과 문화연구원 2019 장신논단 Vol.51 No.2

21세기에 들어서 국제 관계에서 가장 주목할 만한 사실은 중국의 급격한 부상일 것이다. 이러한 중국의 부상은 한편으로는 주변 국가들에게 도움을 줄 수 있지만 다른 한편으로는 위협으로 등장할 수 있다. Graham Allison에 의하면 21세기에서 중국의 부상은 필연적으로 미국과의 패권전쟁의 가능성을 내포하고 있음을 말하고 있다. 이러한 패권갈등 현상으로 현재 미국과 중국 간의 무역전쟁을 위시하여, 대만 문제, 동중국해 문제, 남중국해 문제 등 다양한 국제 문제와 맞물려 있고, 한반도에서는 북한의 비핵화 문제와 한반도 통일 문제에서 핵심적인 갈등의 뇌관으로 자리 잡고 있다. 따라서 우리는 한반도 비핵화와 평화를 위해서는 투키디데스 함정으로부터 벗어나야 한다. 지금까지 북한은 내부의 체제안정과 경제문제, 그리고 비대칭 외교적 수단, 강력한 외부세력에 대한 군사적 대응으로서 비대칭 전력으로서 핵무기 개발을 진행해 왔다. 그러나 이러한 북한의 핵무기 개발이 제2차 세계대전 후 지금까지 국제정치 질서에서 핵무기의 용도가 군사적 수단 보다는 정치적 수단이었다는 점에서 볼 때, 북한의 핵 문제는 군사적 문제로서 접근하기 보다는 한반도에서 미국과 중국의 패권경쟁이라는 측면에서 접근하는 것이 더 타당한 것이라고 할 수 있다. 지금까지 한반도 비핵화 문제를 위해 북한과 미국 정상회담을 2차례 가졌다. 그러나 이러한 회담과 더불어 북한과 중국의 정상회담 역시 3차례나 가졌으며, 고위급회담도 수차례에 걸쳐 진행되었다. 중국은 북한의 5차, 6차 핵실험 이후 가져왔던 태도와는 달리 북한의 환심을 사기 위하여 김정은을 특별 초청하는 등 많은 노력을 기울였다. 이것은 한반도 비핵화와 더불어 한반도 내에서 전개될 수 있는 미국 중심의 한반도 질서 재편에 대한 부담감과 경계가 작용했다고 볼 수 있다. 미국 역시 한반도 내에서 통일의 주도권과 더불어 동북아지역에서 일본과 함께 중국의 부상을 견제할 수 있는 중심축을 형성할 수 있는 국제 관계를 염두에 두기 때문이다. 따라서 한반도의 비핵화 문제는 투키디데스 함정으로부터 자유롭기 어려운 국제 정치 지형적 특성을 가지고 있다. 현 한반도의 상황에서 한반도 평화를 위한 한국교회 역할에 대한 선택사항이 많지 않다. 한국교회는 과거 독일교회의 모습에서 한반도 평화를 위한 역할을 찾아 볼 수 있다. 한국교회 역시 남북 교회가 특수성을 가진 교회로서 인정하고 교류를 통해 관계를 다지면서 협력과 상호보완을 통해 교회의 동질성과 민족 동질성을 회복하고 남북 교회가 통일의 동반자로서 교회의 역할을 해 나가야 한다. The most noticeable phenomenon of international relations in the 21st century would be the sudden rise of China. Such a rise of China could be beneficial, but also threatening to nations adjacent to it. According to Graham Allison, the rise of China implies the possibility of a hegemonic war with the US. This phenomenon of hegemony between the US and China has been closely linked with several international issues, including the ongoing trade war between these two nations, Taiwan issues, East China Sea issues, and South China Sea issues, and it has been the detonator for critical conflicts of Korea including the denuclearization of North Korea and the unification of Korea. To accomplish the denuclearization of North Korea and to achieve peace the Korean peninsula, it would be essential to escape from the trap of Thucydides. Until now, North Korea has developed nuclear weapons as the ultimate device to handle the internal system stability and economic issues of North Korea and as an asymmetric diplomatic and military means against powerful external force. However, considering the fact that nuclear weapons have been a political means rather than a military means in the international political order since the World War II, it would be more reasonable to approach the development of nuclear weapons of North Korea from the perspective of the competition of hegemony between the US and China in the Korean peninsula, rather than to address it as a military issue. So far, the US has held two summits with North Korea for the denuclearization of the Korean peninsula, but it should be never neglected that there have been three summits of China and North Korea as well as several high-level talks. Unlike the attitude of China towards North Korea after its fifth and sixth nuclear tests, China has made a lot of efforts to secure the favor of North Korea. It might be due to the pressure and wariness of China about that the re-organization of Korea after the denuclearization could be led by the US. The US is also concerned about how to construct a central axis, in cooperation with Japan, in Northeast Asia in order to contain the rise of China as well as how to secure the initiative in the unification of Korea. The denuclearization of the Korean peninsula has the geographical nature, not easy to become free from Thucydides Trap. In the current situation of the Korean peninsula, the Church of Korea has a very limited role to play. Still, it could expand its possibility by learning from the Church of Germany in the past. Although Germany became a divided nation, the Church of Germany appreciated it as a ‘special community’ rather than rejecting each other. They promoted exchanges between these two nations, in turn promoting exchanges between private organizations. Therefore, it would be possible to say that the Church of Germany played significant role in the pro-democracy movement of East Germany led by the Church of East Germany and provided a motivation to start a new unification movement beyond the influences of powerful nations. Thus, the Church of Korea should also admit that the churches of North and of South Korea are the same Church with the unique nature, and promote exchanges to recover the homogeneity, and grope for its special role to promote the unification of Korea.

센서 네트워크에서 장애물 극복을 위한 방향기반의 라우팅 기법

고영일(Young Il Ko),박창섭(Chang Sup Park),손인근(In Keun Son),김명호(Myoung Ho Kim) 한국정보과학회 2006 정보과학회논문지 : 정보통신 Vol.33 No.6

Geographic routing protocols are very attractive choice for routing in wireless sensor networks because they have been shown to scale better than other alternatives. Under certain ideal conditions, geographic routing works correctly and efficiently. The most commonly used geographic routing protocols include greedy forwarding coupled with face routing. Existing face routing algorithms use planarization techniques that rely on the unit-graph assumption. In real world, many conditions violate the unit-graph assumption of network connectivity, such as location errors, communication voids and radio irregularity, cause failure in planarization and consequently face routing. In this paper, we propose the direction-based geographic routing, which enables energy efficient routing under realistic conditions without planarization techniques. Our proposed approach is for the case in which many sensors need to collect data and send it to a central node. Simulation results show that the protocol exhibits superior performances in terms of energy consumption, delivery success rate, and outperforms the compared protocols. 센서 네트워크에서는 센서노드들 사이에 다양한 형태의 장애물들이 존재할 수 있다. 이러한 장애물들로 인하여 라우팅 과정에서 해결해야 할 여러 가지 문제점들이 발생하게 된다. 즉, 장애물을 우회하는 과정에서 극복경로가 지나치게 길어질 수 있다. 따라서, 장애물이 많은 환경에서도 에너지 효율적으로 경로를 생성할 수 있는 라우팅 기법이 요구된다. 기존의 위치기반 라우팅 기법은 장애물 극복을 위해 전체 네트워크 그래프를 평면 그래프(planar graph)로 변환하는 과정을 필요로 한다. 이 과정에서 실제 네트워크 토폴로지가 왜곡됨으로 인해 여러 가지 문제점들이 발생할 수 있다. 본 논문에서는 목적지 중심의 극 좌표계를 기반으로 센서의 위치를 결정하고, 플라나 과정 없이 장애물을 적응적으로 극복할 수 있는 방향기반의 라우팅 기법을 제안한다. 또한, 실험을 통하여 제안 방법이 장애물을 회피하는 과정에서 에너지 효율적인 경로를 생성함을 보인다.

한의학적 활용을 위한 임피던스 심장기록법의 연구동향

고영일 ( Young-il Ko ),이현수 ( Hyon-soo Lee ),박영재 ( Young-jae Park ),박영배 ( Young-bae Park ) 대한한의진단학회 2006 大韓韓醫診斷學會誌 Vol.10 No.2

Objectives: To review the method, validity and reliability of Impedance Cardiography and to study its oriental medical application. Method: The papers reviewed in this study were searched through internet search engines such as Springer, Science Direct, and China National Knowledge Infrastructure. Conclusion: In this study, the methodological limitations, validity and reliability of impedance cardiography were examined. Impedance Cardiography is recognized as a highly accurate non-invasive tool to assess hemodynamic parameters. The ability of impedance cardio-graphy to assess hemodynamic parameters in non-invasive way is very suitable for researches on the effect of oriental medical therapeutics or the validation of oriental medical diagnostic.

HOW CAN TED AFFECT LISTENING ANXIETY?

Young-Ah Ko(고영아) 미래영어영문학회 2017 미래영어영문학회 학술대회 자료집 Vol.2017 No.6

멀티미디어의 현황과 미래

고영만(Young-Man Ko) 한국데이타베이스학회 1997 한국데이타베이스학회 국제 학술대회 Vol.1997 No.10

Time-Slot을 이용한 UWB 시스템의 전송율 개선에 관한 연구

고영은(Young Eun Ko),방성일(Sung Il Bang) 대한전자공학회 2002 대한전자공학회 학술대회 Vol.2002 No.11