• 의료법학
• /
• 제10권1호
• /
• pp.11-38
• /
• 2009

"Bioethics" may have various meanings depending on its roles. It may mean professional ethics for scientists and physicians, etc. It may also mean an academic discipline using interdisciplinary approach as well as a philosophical or a legal approach. "Bioethics" as an interdisciplinary study should often deal with public policy on bioethical issues. I call this role bioethics as a study of bioethics policy, which has to be developed as a new discipline. From this perspective, I deal with bioethical issues relevant to a human life before birth. There are various and often conflicting arguments about the moral status of a human life before birth such as the fertilization argument, the argument of genetic identity, so-called the "14 days" argument focusing on the formation of primitive streak, the argument of sentient being, and Michael Sandle's argument of an embryo as a being between a thing and a person. I argue that each of them is reasonable. Thus we are faced with reasonable disagreement on the views over whether a human life before birth has the same right to life as that of a person or whether right to life may be considered to be a matter of degree. If we acknowledge reasonable disagreement, as John Rawls pointed out, we should tolerate the views from ours in a plural society. Therefore, we cannot help making a policy that allows abortion and embryonic research with some limitations. When we say a certain act is morally permissible, "moral permissibility" does not mean that the act is morally right for all. Rather it means that the act cannot help being morally allowed for some persons although the others do not believe its moral rightness because they cannot right now rationally persuade others to accept their view.

• 대한기계학회논문집
• /
• 제15권2호
• /
• pp.575-583
• /
• 1991

The weld pool convection problem that occurs during the stationary GTA welding has been studied, considering the four driving forces for weld pool convection, i.e., the electromagnetic force, the buoyancy force, the aerodynamic drag force, and the surface tension force at the weld pool surface. In the numerical simulation, the difficulties associated with the irregular moving liquid-solid interface have been successfully overcome by adopting a Boundary-Fitted Coordinate system. In the experiments to show the validity of the numerical analysis, a deep periphery and shallow centerpentrated weld pool shape was observed from the etched specimen. It could be revealed that this type of weld pool shape could be simulated, only when some of aerodynamic drag force distributions are considered. Although slight disagreement arose, the calculated and the observed weld pool shapes were in a reasonable agreement.

• Steel and Composite Structures
• /
• 제8권2호
• /
• pp.159-178
• /
• 2008

An analytical procedure is presented for the determination of the buckling load and the buckling temperature of a straight, slender, geometrically perfect, axially loaded, translationally and rotationally restrained steel column exposed to fire. The exact kinematical equations of the column are considered, but the shear strain is neglected. The linearized stability theory is employed in the buckling analysis. Behaviour of steel at the elevated temperature is assumed in accordance with the European standard EC 3. Theoretical findings are applied in the parametric analysis of restrained columns. It is found that the buckling length factor decreases with temperature and depends both on the material model and stiffnesses of rotational and translational restraints. This is in disagreement with the buckling length for intermediate storeys of braced frames proposed by EC 3, where it is assumed to be temperature independent. The present analysis indicates that this is a reasonable approximation only for rather stiff rotational springs.

• 대한안전경영과학회:학술대회논문집
• /
• 대한안전경영과학회 2004년도 춘계학술대회
• /
• pp.283-289
• /
• 2004

The number of pixel defects including bright and black dots on a panel is one of the critical factors determining the quality of TFT-LCD. Since pixel defects on the TFT-LCD panels are sometimes unavoidable, manufacturers have to inspect the panels so that any panel with an unacceptable number of defects will not be delivered to the buyers. However, the buyers demand for the manufacturers to meet different pixel defects tolerances (acceptable number of pixel defects on a TFT-LCD panel) around central(tight) and peripheral(loose) inspection zones. The disagreement in quality standard among different buyers also cause confusions in screening non-confirmative products and unstable yield of production. Few research has focused on the effects of defect locations on a TFT-LCD panel on their detection probabilities and the rational division of defect inspection zones. In this research, experiments were conducted to find the detection probabilities of black dot defects with respect to their varying locations on a TFT-LCD. It is proposed a rational division of inspection zone on a TFT-LCD panel on the basis of detection probabilities of the defects. With these division of inspection zones and the mean defect detection probability within each zone, it is expected to establish a more reasonable pixel defects tolerances.

• 한국도로학회논문집
• /
• 제19권6호
• /
• pp.23-30
• /
• 2017

PURPOSES : In this paper, the applicability of DEM to a coarse graining method was evaluated by simulating a series of minicone tests for cement paste. METHODS : First, the fundamental physical quantities that are used in a static liquid bridge model were presented with three basic quantities based on the similarity principle and coarse graining method. Then, the scale factors and surface tensions for six different sizes of particles were determined using the relationship between the physical quantities and the basic quantities. Finally, the determined surface tensions and radii were utilized to simulate the fluidal behavior of cement paste under a minicone test condition, and the final shape of the cement paste with reference DEM particle radii was compared with the final shape of the others. RESULTS : The simulations with adjusted surface tensions for five different radii of particles and surface tension showed acceptable agreement with the simulation with regard to the reference size of the particle, although disagreement increases as the sizes of the particle radii increase. It seems reasonable to increase the particle radii by at least 0.196 cm considering the computational time reduction of 162 min. CONCLUSIONS : The coarse graining method based on the similarity principle is applicable for simulating the behavior of fluidal materials when the behavior of the materials can be described by a static liquid bridge model. However, the maximum particle radius should be suggested by considering not only the scale factor but also the relationship of the particle size and number with the radius of the curve of the boundary geometry.

• 시큐리티연구
• /
• 제46호
• /
• pp.31-62
• /
• 2016

본 연구는 신변보호요원의 윤리적 딜레마에 대한 현상학적 연구로 신변보호요원을 대상으로 윤리적 딜레마에 대한 경험적 사실들을 근거로 의미와 본질을 찾아 신변보호요원들의 윤리적 딜레마에 대한 과정과 경험을 연구하여 본질을 이해하고 예방과 대처를 할 수 있는 기초적자료를 위한 방안을 제시하는데 목적이 있다. 이러한 연구목적을 달성하기 위하여 Colaizzi의 6단계 분석 절차를 사용하여 5년이상 근무를 한 7명의 윤리적 딜레마를 경험한 신변보호요원을 연구대상으로 선정하여, 2015년 10월 1일부터 2015년 11월 20일까지 면접 및 질문지를 통해 자료를 분석하고 연구의 타당성과 윤리적 고려사항을 통해 내용을 분석하여 다음과 같은 결과를 도출할 수 있었다. 연구 결과 신변보호요원의 윤리적 딜레마의 중심의미는 6개와 20개의 주제진술로 파악되었다. 첫째, 중심의미는 갈등요인으로 주제는 직전관행과의 충돌, 규정 절차 문제, 조직 직무소통, 서비스불일치이다. 둘째, 중심의미는 업무상 역할제한으로 주제는 제도적 관행, 의사결정, 우선순위이다. 셋째, 중심의미는 업무상 상황판단의 어려움으로 주제는 결정의 모호성, 지식 및 경험, 의견대립이다. 넷째, 중심의미는 합리적 자기 방어로 주제는 책임감결여, 합리화, 의도적 외면, 자괴감이다. 다섯째, 중심의미는 대인관계 어려움으로 주제는 상 하관계, 중간 관리자 역할, 비협조적 업무, 불쾌한 언행이다. 여섯째, 중심의미는 비밀유지로 주제는 묻혀진 행태, 불법관행이다.

• 융합보안논문지
• /
• 제17권4호
• /
• pp.39-47
• /
• 2017

오늘날 대한민국에서는 다시금 양심적 병역거부자 처벌이 사회적 이슈로 부각되고 있다. 대법원과 헌법재판소는 종교적 신념을 이유로 입영을 거부한 입영대상자를 처벌하는 병역법 제88조 제1항에 관하여 합헌적 판단이 견고한 가운데 최근 지방법원을 중심으로 하급심에서 양심적 병역거부자에게 무죄를 선고한 판결이 2015년 6건, 2016년 7건 그리고 2017년 상반기에만 16건 등이 나오고 있는 것이다. 또한 종교적 양심에 따른 병역거부자의 처벌에 관하여 제주지방법원 내에서 유죄와 무죄의 판결이 엇갈리면서 논쟁은 더욱 가중되고 있는 실정이다. 이러한 논란가운데 양심적 병역거부자를 처벌하는 근거규정인 병역법 제88조 제1항에 관하여 대법원, 헌법재판소 그리고 최근 하급심의 판단을 살펴보고 특히 병역법 제88조 제1항의 정당한 사유의 인정범위에 양심적 병역거부가 포함될 수 있는지 그리고 자유권규약 제18조 해석 적용에 관하여 검토하고자 한다.

• 헤리티지:역사와 과학
• /
• 제42권2호
• /
• pp.40-61
• /
• 2009

첨성대의 구조와 현재의 모습에 대한 합리적인 설명을 과학적으로 추론할 수 있는 토대를 마련하고자 첨성대 건립을 위한 새로운 시공방법론을 제안하였다. 이는 기존의 시공방법을 첨성대의 건립에 적용할 경우 가설구조물의 설치 및 운용, 돌을 나르기 위한 기중장비의 설치 및 운용 및 내부 채움 흙의 시공 등에 있어 해결하여야 할 문제와 첨성대 건립 당시 신라인들이 보유하였을 것으로 간주되는 장비 사이의 괴리를 달리 설명할 도리가 없기 때문이다. 나아가 첨성대의 얼개 및 현재의 모습에 대하여 제기되는 기단과 남창구 사이 향(向)의 차이, 원통형 몸통의 일그러진 원형평면, 이웃하는 단 사이의 어긋남, 기울기와 일치하지 않는 각 단 편심의 분포, 외부 수평 수직 줄눈의 완벽한 정렬상태, 내부 채움 흙의 존재 이유 등 여러 가지 의문들에 대한 합리적이고도 과학적 근거가 있는 설명이 필요하였기 때문이기도 하다. 제안된 새로운 시공방법론은 이 모든 문제와 의문들에 대한 명료한 답을 주고 있다. 따라서 제안된 새로운 시공방법론은 첨성대를 축조한 당시의 건축자가 필연적으로 채택하였을 수 밖에 없었던 시공방법에 가장 가까운 건립방법이었을 가능성이 높다고 하겠다. 아울러 현재 첨성대 인근 황남동 일대에 산재하는 크고 작은 고분군의 존재는 이 논문에서 제안된 새로운 시공방법론을 첨성대 건립 당시의 신라인들이 자연스럽게 사용하였을 가능성을 암시하고 있다고 하겠다.

• 한국진공학회:학술대회논문집
• /
• 한국진공학회 2000년도 제18회 학술발표회 논문개요집
• /
• pp.174-174
• /
• 2000

A strong antiferromagnetic coupling in Fe/Si multilayered films (MLF) had been recently discovered and much consideration has been given to whether the coupling in the Fe/Si MLF system has the same origin as the metal/metal MLF. Nevertheless, the nature of the interfacial ron silicide is still controversial. On one hand, a metal/ semiconductor structure was suggested with a narrow band-gap semiconducting $\varepsilon$-FeSi spacer that mediates the coupling. However, some features show that the nature of coupling can be well understood in terms of the conventional metal/metal multilayered system. It is well known that both magneto-optical (MO) and optical properties of a metal depend strongly on their electronic structure that is also correlated with the atomic and chemical ordering. In this study, the nature of the interfacial regions is the Fe/Si multilayers has been investigated by the experimental and computer-simulated MO and optical spectroscopies. The Fe/Si MLF were prepared by rf-sputtering onto glass substrates at room temperature with the number of repetition N=50. The thickness of Fe sublayer was fixed at 3.0nm while the Si sublayer thickness was varied from 1.0 to 2.0 nm. The topmost layer of all the Fe/Si MLF is Fe. In order to carry out the computer simulations, the information on the MO and optical parameters of the materials that may constitute a real multilayered structure should be known in advance. For this purpose, we also prepared Fe, Si, FeSi2 and FeSi samples. The structural characterization of Fe/Si MLF was performed by low- and high -angle x-ray diffraction with a Cu-K$\alpha$ radiation and by transmission electron microscopy. A bulk $\varepsilon$-FeSi was also investigated. The MO and optical properties were measured at room temperature in the 1.0-4.7 eV energy range. The theoretical simulations of MO and optical properties for the Fe/Si MLF were performed by solving exactly a multireflection problem using the scattering matrix approach assuming various stoichiometries of a nonmagnetic spacer separating the antiferromagnetically coupled Fe layers. The simulated spectra of a model structure of FeSi2 or $\varepsilon$-FeSi as the spacer turned out to fail in explaining the experimental spectra of the Fe/Si MLF in both intensity and shape. Thus, the decisive disagreement between experimental and simulated MO and optical properties ruled out the hypothesis of FeSi2 and $\varepsilon$-FeSi as the nonmagnetic spacer. By supposing the spontaneous formation of a metallic ζ-FeSi, a reasonable agreement between experimental and simulated MO and optical spectra was obtained.