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박진호,이장무,조한상,공진형,박영일,Park, Jin-Ho,Lee, Jang-Mu,Jo, Han-Sang,Gong, Jin-Hyeong,Park, Yeong-Il 대한기계학회 2000 大韓機械學會論文集A Vol.24 No.4
Actual and strict definition of the shift quality for the powertrain system equipped an automatic transmission must be understood through the acceleration change of the vehicle body, which the driver directly feels as a shift shock. For this reason, it is necessary to concurrently analyze the characteristics of the powertrain system and the vehicle body. This paper presents the mathematical model of the vehicle body, which is based on the equivalent lumped system, to append to the developed model of the powertrain system. The concept of tire slip is also introduced for the experimental relationship between tire/road and driving force. Using the developed dynamic simulation programs, shift transients characteristics are analyzed. Theoretical results are compared with experimental ones from real car tests in equal conditions in order to prove the validity of presented model. In these tests, the system to measure the vehicle acceleration is used with various speeds and engine throttle sensors. It is expected that the presented modeling techniques can provide good predictions of the vehicle driving comfortability.
박진호,정태화,조용식,Park. Jin-Ho,Jung. Tae-Hwa,Cho. Yong-Sik 한국방재학회 2008 한국방재학회 학술발표대회논문집 Vol.2008 No.1
There are many studies about submerged structures or porous wave absorbers to decrease damage of coast and structures. Submerged structures and porous wave absorber are decreasing energy of incoming wave by reflecting or dissipation with changing depth or with porous rubble mound. This study addresses the reflection and transmission of long wave from a trapezoidal breakwater and a vertical porous wave absorber at the same time. A systematic shape transfer is derived to determine wave reflection and transmission. And periodic solutions are matched at the slope and the front face of the absorber by assuming continuity of pressure and mass. The transmission coefficient is determined as a function of parameters describing the incoming waves, transmitting waves through the trapezoidal breakwater and the absorber characteristics.
박진호,곽정식,Park, Jin-Ho,Kwak, Jyung-Sik 대한수사과학회 2006 대한수사과학회지 Vol.1 No.2
현시성 자살(exhibitional suicide)이란 죽으려는 의도는 없이 타인에게 "내심의 의사"를 전달할 목적으로 "자살에 이르지 않을 것으로 스스로 인지한 방법"을 사용하였으나 죽음에 이르는 경우를 말하며, 이러한 현시성 자살은 자살과 구별되는 몇가지 특징이 있다. 첫째, 자살의도의 진지성으로 죽고 싶은 마음이 얼마나 분명하고 진지한가에 의해, 둘째, 자살 시도 방법에 의해, 셋째, 자살하는 장소 면에서 구별된다. 즉, 현시성 자살은 죽을려는 목적이 없기 때문에 자살자에 비해 자살의도가 결여되어 있고, 덜 치명적인 방법을 사용하며, 타인에게 쉽게 발견될 수 있는 장소에서 자살을 시도하는 것으로 나타났다. 본 연구에서 경북대학교 법의학교실에 의뢰된 부검 분석 결과 중독사(31.5%)의 경우 적지 않은 수가 현시성 자살자로 추론할 수 있으며, 이러한 현시성 자살은 성인보다는 청소년, 남자보다는 여성에게서 많이 나타나고 있음을 연구 재료 분석 결과에서 간접적으로 증명하였다. 또한 자살 기도자 중 많은 경우가 현시성 자살에 해당됨을 확인하였다. 이러한 현시성 자살은 법적인 관점, 즉 생명보험과의 관계에서는 사고사로 보고 있다. 그러나 현시성 자살을 사고사로 볼 경우 실제 사건에서 입증하기가 어렵고, 보험의 목적과 보험사의 자살면책기간을 둔 취지에 의하면 오히려 현시성 자살을 사고사와 구별하여야 함을 고찰하였다. 현시성 자살은 관계의 부재에서 발생하므로 주변 사람들의 조그마한 관심으로도 이러한 자살을 예방할 수 있다. 심리부검을 통해 테이터화하여 이를 유형화시킴으로써 통계적 목적으로 이용할 수 있고, 앞으로 일어날 유사한 자살을 예방할 수 있을 것이다. 이에 우리나라에서는 현시성 자살에 대한 연구가 아직 없는 상태이므로 더 많은 연구가 필요하다. An exhibitional suicide is a case of death that the purpose is to demonstrate one's own real intention for others. This exhibitional suicide has a few characteristics that are different from a suicide: seriousness of suicide intention, a method of suicide attempt, and the place of a suicide. In other words, an exhibitional suicide lacks suicide intention, uses a slower method of death, and attempts a suicide at the place which others can easily find. In this light, this paper ascertains that a fair number in poisoning deaths are an exhibitional suicide on the basis of the result of an autopsy by department of forensic medicine school of medicine, Kyungpook National University. The research also confirms that juveniles and women attempt a suicide as often as adults and men, and a great number of suicides are indeed an exhibitional suicide. In terms of a commercial law, many specialists see an exhibitional suicide as an accidental death. However, if we consider an exhibitional suicide as an accidental death, we cannot verify the authenticity of death in an accident. In addition, if we observe the purpose of insurance and suicide exemption period of insurance company, we rather get to know to distinguish an exhibitional suicide from an accident. According to the research, most of the exhibitional suicide results from little or no-relation with others. Therefore, a little interest from family, friend, and neighbor plays a pivotal role in preventing this suicide. Finally, an effort to build database concerning an exhibitional suicide by a psychological autopsy will help people access a plenty of statistical materials and facilitate further study about an exhibitional suicide.