• 대한자기공명의과학회:학술대회논문집
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• 대한자기공명의과학회 2003년도 제8차 학술대회 초록집
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• pp.92-92
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• 2003

To evaluate remodeling of infarcted myocardium with contrast-enhanced MRI (co-MRI) at true end-diastole (ED) MRI was performed with a Gyroscan Intera (1.5 Tesla, Philips, Netherlands) in 13 patients with acute subendocardial myocardial infarction. The First exam was done 0-15 days (mean 5.2days) after symptom onset and the second exam 28-88days (mean 49 days) after the first exam. Ce-MRI encompassing the entire left ventricle was peformed with a multi-shot, turbo-field-echo, breath-hold sequence and a non-selective, inversion prepulse 10 minutes after the intravenous injection of Gd-DTPA at a dose of 0.2 mmol/kg body weight. To allow the long TD, ECG synchronization should use two RR-intervals for one acquisition of a segment of k-space by setting the heart rate to half that of the true heart rate. Trigger delay time (TD) was adjusted to the RR-interval for true end-diastolic imaging. The other typical parameters were TR=5.4ms, TE=1.6ms, voxel size=1.37$\times$1.37$\times$10mm, k-space data segmented into 8 segments with 32 lines of segment per two cycles over 16 cardiac cycles. The thickness of hyperenhanced myocardium and epicardially nonenhanced myocardium were followed.

• 한국생활과학회지
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• 제19권5호
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• pp.873-882
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• 2010

Knitwear has become a part of fashion since aristocratic trend-setters of Medieval Spain and France began wearing luxurious silk stockings. However, in more recent times knitwear emerged as a fashion item in the early 20th century when jersey two-piece Channel dresses became popular amongst the French upper classes. Knitwear then evolved into genuine going out clothes through Sonia Rykiel in the 1970s. Sonia Rykiel has made a great contribution to developing knitwear, which she transformed from being used only in informal dresses or clothes for home wear, to a boarder in use in high-quality dresses such as those worn at parties. Unlike most designers who tend to make very different styles each year, she has restricted her clothes to those made with knitwear. The study examined the designs and formative characteristics of her knitwear in order to clarify why Sonia Rykiel's knitwear fashion is apparently so timeless. Results showed that her garments consistently used black oriented color combination, strife patterns, intarsia techniques and application of diversified subordinate materials and other materials that overcome earlier limitations of knitwear. In addition, her designs consistently express the typically Parisian sophisticated urban femininity through practicality, sensuality and playfulness. Overall, her fashion has shown that it exists for women in action through practical design within the scope of demode, the philosophy in her early days, and it has led her to hold great power over knitwear fashion for the past 40 years.

• Asian Journal for Public Opinion Research
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• 제2권4호
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• pp.279-306
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• 2015

Americans continue to have beliefs in the paranormal, for example in UFOs, ghosts, haunted houses, and clairvoyance. Yet, to date there has not been a systematic gathering of data on popular beliefs about the paranormal, and the question of whether or not there is a convincing trend in beliefs about the paranormal remains to be explored. Public opinion polling on paranormal beliefs shows that these beliefs have remained stable over time, and in some cases have in fact increased. Beliefs in ghosts (25% in 1990 to 32% in 2005) and haunted houses (29% in 1990, 37% in 2001) have all increased while beliefs in clairvoyance (26% in 1990 and 2005) and astrology as scientific (31% in 2006, 32% in 2014) have remained stable. Belief in UFOs (50%) is highest among all paranormal beliefs. Our findings show that people continue to hold beliefs about the paranormal despite their lack of grounding in science or religion.

• 한국해안해양공학회지
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• 제19권2호
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• pp.170-178
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• 2007

대부분의 포물형 수치모형은 경계 외측의 수심이 해안방향으로 변하지 않는 Snell 법칙을 적용할 수 있는 조건으로 국한한다. 여기에는 기존의 Kirby 방법이 있으며 본 논문에서는 이를 수정한 방법 그리고 Dirichlet 경계조건에 대해 자세히 기술하고 이에 대한 수치실험 결과를 제시하였다. 일정 수심 위에 존재하는 원형 천퇴에 대한 수치실험 결과 계산영역 좌우에 가상 수치 조정구역을 두고 본 Dirichlet 경계조건을 적용한 경우가 파고비의 분포가 가장 작게 왜곡되는 것으로 나타났다.

• 한국식생활문화학회지
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• 제19권4호
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• pp.378-391
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• 2004

The Korean tea culture appeared in a variety of ceremonies of the royal household. It was a method of religion for scholars and Buddhist monks, and sometimes it also was a refinement, too. in addition, it played an important role as a household medicine for the common people. As mentioned above, the Korean tea culture has a deep-rooted effect on the Korean traditional culture from the spiritual aspect, art, learning, to the practical life. Recently the tea culture has been rapidly coming into vogue. So the tea culture has been recognised not only to be an index of the cultural level, but also to be an important cultural phenomenon. Besides, It came to be a major role as a reception method by which we can communicate with quests from ail over the world. Because preferred tea was different according to the times and to the regions, tea utensils have been changed along with the tea culture. The present Korean tea culture has a tendency to go to the somewhat different way from the traditional one. This study has the purpose to let us apprehend the Korean traditional culture and hold the national pride. In addition, the value of the Tea should be assessed more properly, and our own Tea that is unique, simple, and natural, should be settled in the our culture.

• 한국신뢰성학회:학술대회논문집
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• 한국신뢰성학회 2004년도 정기학술대회
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• pp.239-246
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• 2004

가속열화시험은 가속수명시험시에 고장 개수가 적거나 심지어 고장이 발생하지 않는 경우에도 부품의 신뢰성을 평가할 수 있는 유용한 수단이 되고 있다. 본 연구에서는, 능동소자로 높은 유전용량을 갖는 적층 세라믹 콘덴서(X7R -55$^{\circ}C$~1$25^{\circ}C$)에 대한 가속열화시험을 실시하고, 정격온도의 최대치에서 다른 배율의 전압을 인가하여 단순선형회귀에 의한 특성치의 경시변화를 설명한다고 가정하였다. 최소제곱법을 적용하여 시료가 대수정규분포를 따를 때의 열화량을 설명한 후, 특성치-시간간의 선형관계 및 대수정규분포의 독립성을 검정하여 가정의 적절성을 검정하였다. 마지막으로 아이링모델에 의한 평균수명을 평가하였다.

• Smart Structures and Systems
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• 제1권4호
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• pp.325-338
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• 2005

Utilizing robotic based reconfigurable nodal structural health monitoring systems has many advantages over static or human positioned sensor systems. However, creating a robot capable of traversing a variety of civil infrastructures is a difficult task, as these structures each have unique features and characteristics posing a variety of challenges to the robot design. This paper outlines the design and implementation of a novel robotic platform for deployment on ferromagnetic structures as an enabling structural health monitoring technology. The key feature of this design is the utilization of an attachment device which is an advancement of the common magnetic base found in the machine tool industry. By mechanizing this switchable magnetic circuit and redesigning it for light weight and compactness, it becomes an extremely efficient and robust means of attachment for use in various robotic and structural health monitoring applications. The ability to engage and disengage the magnet as needed, the very low power required to do so, the variety of applicable geometric configurations, and the ability to hold indefinitely once engaged make this device ideally suited for numerous robotic and distributed sensor network applications. Presented here are examples of the mechanized variable force magnets, as well as a prototype robot which has been successfully deployed on a large construction site. Also presented are other applications and future directions of this technology.

• 논리연구
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• 제8권1호
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• pp.47-67
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• 2005

베이즈망은 탐구 공간을 구성하는 변수들 사이에 성립하는 확률적 관계를 이용하여 그 변수들 사이에 성립된다고 가정되는 인과 관계를 추론하는데 이용된다. 베이즈망에 관한 철학적 논쟁의 대상은 특정한 변수들의 확률적 독립성을 가정하는 인과적 마코프 조건이다. 베이즈망 이론에 대한 강력한 비판자인 카트라이트는 인과적 마코프 조건이 비결정적 세계에서는 성립될 수 없기 때문에 인과적 추리에 대한 타당한 원리가 될 수 없다고 주장한다. 이글의 목적은 인과적 마코프 조건이 인과적 추리에 대한 타당한 원리가 될 수 없다는 카트라이트의 비판이 타당한가를 검토하는 것이다. 나는 인과적 사건들의 연쇄를 허용하는 연속모델은 카트라이트의 비판을 벗어날 수 있다고 주장한다.

• 산업경영시스템학회지
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• 제41권2호
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• pp.117-132
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• 2018

There always exist nonzero inspection errors whether inspectors are humans or automatic inspection machines. Inspection errors can be categorized by two types, type I error and type II error, and they can be regarded as either a constant or a random variable. Under the assumption that two types of random inspection errors are distributed with the "uniform" distribution on a half-open interval starting from zero, it was proved that inspectors overestimate any given fraction defective with the probability more than 50%, if and only if the given fraction defective is smaller than a critical value, which depends upon only the ratio of a type II error over a type I error. In addition, it was also proved that the probability of overestimation approaches one hundred percent as a given fraction defective approaches zero. If these critical phenomena hold true for any error distribution, then it might have great economic impact on commercial inspection plans due to the unfair overestimation and the recent trend of decreasing fraction defectives in industry. In this paper, we deal with the same overestimation problem, but assume a "symmetrical triangular" distribution expecting better results since our triangular distribution is closer to a normal distribution than the uniform distribution. It turns out that the overestimation phenomenon still holds true even for the triangular error distribution.

• 한국세라믹학회지
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• 제44권6호
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• pp.303-307
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• 2007

Transparent In-doped zinc oxide (IZO) thin films are deposited with variation of pulsed DC power at Ar atmosphere on coming 7059 glass substrate by pulsed DC magnetron sputtering. A c-axis oriented IZO thin films were grown in perpendicular to the substrate. The optical transmittance spectra showed high transmittance of over 80% in the UV-visible region and exhibited the absorption edge of about 350 nm. Also, the IZO films exhibited the resistivity of ${\sim}10^{-3}{\Omega}\;cm$ and the mobility of ${\sim}6cm/V\;s$. Organic Light-emitting diodes (OLEDs) with IZO/N,N'-diphenyl-N, N'-bis(3-methylphenl)-1, 1'-biphenyl-4,4'-diamine (TPD)/tris (8-hydroxyquinoline) aluminum ($Alq_3$)/LiF/Al configuration were fabricated. LiF layer inserted is used as an interfacial layer to increase the electron injection. Under a current density of $100\;mA/cm^2$, the OLEDs show an excellent efficiency (9.4 V turn-on voltage) and a good brightness ($12000\;cd/m^2$) of the emission light from the devices. These results indicate that IZO films hold promise for anode electrodes in the OLEDs application.