• 만화애니메이션 연구
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• 통권13호
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• pp.199-210
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• 2008

이 논문은 프랑스의 장편 애니메이션 르네상스의 미학적 분석을 시도한다. 애니메이션은 '이미지 서사'이므로, 이미지만을 분석하거나 또는 이미지와 무관한 이야기만을 분석할 수 없다. 따라서 이 논문에서는 작품 분석의 하나의 표본으로써, 작품제작의 콘텍스트와 스토리 라인, 이미지의 특성들, 내용적 측면에서의 특성들, 그리고 이를 모두 포괄하는 미학적 특성들이라는 측면으로 접근하려 한다. 이러한 순차적인 접근은 하나의 작품을 평가하는 데 있어서 어떤 부분이 어떤 식으로 탁월하거나 또는 반복적이라는 점을 지적함으로써 작품에 대한 전체적인 평가를 허용한다. 마지막으로, 이러한 접근 방식이 지니는 한계점에 대해서도 지적한다.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2006년도 추계학술발표회
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• pp.163-168
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• 2006

동해의 해양 심층수 자원 기반 환경 연구의 일부로 청결기술을 적용하여 해수 중의 용존성 미량금속 (Cd, Co. Cu, Ni. Ph. Zn) 농도 분포와 변화를 조사하였다. 강원과 경북 지역에 총 6개 정점을 선정하고, 각 지역마다 최대 채수 수심 각각 200-300m 와 500m 까지 시료를 채취하였다. 본 연구의 미량금속을 위한 연안해수 표준물질 (CASS-4) 의 분석 결과 각 원소 평균 회수율은 Co의 89.4% 에서 Cd 의 99.8%의 범위였다. 용존 미량원소의 분포는 해역 및 시기적인 변화가 다양하게 나타났다 Cd, Ni, Zn의 경우는 영양염 의존형으로 표층에서 낮고 저층으로 갈수록 증가하는 경향이 뚜렷하였다. 그러나 Co, Cu, Ph 은 수직적으로 불규칙적인 분포를 나타내었다. 본 연구의 통해 심층수 원수의 중금속 농도는 해역별 수질 기준과 먹는 물 기준을 만족하였다.

• Asian Journal of Atmospheric Environment
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• 제4권2호
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• pp.80-88
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• 2010

In order to offer a better understanding of air pollution of China as well as East Asia we attempted to characterize the chemical properties of the raw coal materials mined in China and their combusted bottom ashes generated from coal fired power plant. To this end, we measured the chemical characteristics of individual bottom ashes and feed coal fragments collected at a coal fired power generator which was operated with the raw coal dug at a coal mine in China. The chemical properties of these two sample types were determined by a synchrotron radiation X-ray fluorescence (SR-XRF) microprobe method. Through an application of such technique, it was possible to draw the 2D elemental maps in and/or on raw coal fragments and fired bottom ashes. The pulverized fine pieces of feed coal mainly consisted of mineral components such as Fe, Ca, Ti, Ca, and Si, while Fe was detected as overwhelming majority. The elemental mass of combusted bottom ash shows strong enrichment of many elements that exist naturally in coal. There were significant variations in chemical properties of ash-to-ash and fragment-to-fragment. Although we were not able to clearly distinguish As and Pb peaks because of the folding in their X-ray energies, these two elements can be used as tracers of coal fire origin.

• 한국산학기술학회논문지
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• 제16권3호
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• pp.2131-2134
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• 2015

본 논문에서는 종이를 기판으로 사용하고 용액공정이 가능한 강유전체 메모리 소자의 제작 가능성을 검토하였다. 유기물 강유전체인 "폴리비닐리덴트리플루오르에틸렌" 용액을 하부전극이 형성된 종이기판 위에 스핀코핑 방법을 이용하여 도포하였다. 하부전극으로는 진공증착법을 이용하여 알루미늄을 증착하였고, 도포된 "폴리비닐리덴트리플루오르에틸렌" 용액은 열처리 과정을 통해 결정화하였다. 제작된 "폴리비닐리덴트리플루오르에틸렌" 박막은 주사 전자 현미경법(SEM), 원자간력 현미경(AFM)을 이용하여 박막의 단면 및 표면의 특성을 평가하였다. 전압에 따른 분극특성 측정을 통해, 종이기판 위에 형성된 "폴리비닐리덴트리플루오르에틸렌" 박막이 매우 훌륭한 강유전체 특성을 보여주고 있음을 확인하였다. 또한, 종이기판의 응용가능성을 검토하기 위하여, 실리콘 기판위에 제작한 "폴리비닐리덴트리플루오르에틸렌" 박막과의 비교에 있어서도 손색없는 강유전체 특성을 보여주고 있음을 알 수 있었다. 이러한 결과들은 종이를 기판으로 이용하여 전자소자들을 제작 할 수 있음을 시사하며, 또한 용액공정으로 고밀도의 저렴한 강유전체 메모리 소자를 손쉽게 제작 할 수 있다는 것을 의미한다.

• Journal of Welding and Joining
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• 제16권5호
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• pp.119-133
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• 1998

To implement full automation in pipe welding, it si most important to develop special sensors and their related systems which act like human operator when detecting irregular groove conditions. In this study, an automatic pipe Gas Metal Arc Welding (GMAW) system was proposed to full control pipe welding procedure with intelligent sensor systems. A five-axes manipulator was proposed for welding torch to automatically access to exact welding position when pipe size and welding angle were given. Pool status and torch position were measured by using a weld-pool image monitoring and processing technique in root-pass welding for weld seam tracking and weld pool control. To overcome the intensive arc light, pool image was captured at the instance of short circuit of welding power loop. Captured image was processed to determine weld pool shape. For weld seam tracking, the relative distance of a torch position from the pool center was calculated in the extracted pool shape to move torch just onto the groove center. To control penetration of root pas, gap was calculated in the extracted pool image, and then weld conditions were controlled for obtaining appropriate penetration. welding speed was determined with a fuzzy logic, and welding current and voltage were determined from a data base to correspond to the gap. For automatic fill-pass welding, the function of human operator of real time weld seam control can be substituted by a sensor system. In this study, an arc sensor system was proposed based on a fuzzy control logic. Using the proposed automatic system, root-pass welding of pipe which had gap variation was assured to be appropriately controlled in welding conditions and in torch position by showing sound welding result and good seam tracking capability. Fill-pass welding by the proposed system also showed very successful result by tracking along the offset welding line without any control of human operator.

• 한국수자원학회논문집
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• 제34권6호
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• pp.587-596
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• 2001

본 연구는 우수를 생활용수로 활용하고 있는 도서지역의 재래적인 우수이용방법을 개선하고 안정적으로 생활용수를 공급할 수 있는 우수이용 시스템을 개발하는데 연구의 목적이 있다. 이를 위하여 연구의 대상지역으로는 제주도 지역을 선정하고 실제 강우 및 생활용수의 관계를 run이론을 이용하여 규명하고 그 결과는 우수이용 시스템의 집수면적과 탱크크기를 설계하는 기법을 제시하였다. 실제에 적용해 본 결과, 설계된 우수이용 시스템이 제주도지역에서 안정적으로 운영이 되는 것으로 나타났으며, 이는 제주도뿐만 아니라 다른 도서지역에서도 본 시스템의 적용이 가능한 것으로 판단되었다. 따라서 본 시스템을 도서 지역의 지붕개량사업과 연계시켜 시행할 때, 도서지역의 주거환경개선과 용수확보를 병행할 수 있는 효과가 기대된다.

• International Journal of Aeronautical and Space Sciences
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• 제10권2호
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• pp.117-124
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• 2009

In the environment where various and complicated threat signals exist, RWR (Radar Warning Receiver), which can warn pilot of the existence of threats, has long been a necessary electronic warfare (EW) system to improve survivability of aircraft. The angle of arrival (AOA) information, the most reliable sorting parameter in the RWR, is measured by means of four-quadrant amplitude comparison direction finding (DF) technique. Each of four antennas (usually spiral antenna) of DF unit covers one of four quadrant zones, with 90 degrees apart with nearby antenna. According to the location of antenna installed in helicopter, RWR is subject to signal loss and interference by helicopter body and structures including tail bumper, rotor blade, and so on, causing a difficulty of detecting hostile emitters. In this paper, the performance degradation caused by signal interference by tail rotor blades has been estimated by measuring amplitude video signals into which RWR converts RF signals in case a part of antenna is screened by real tail rotor blade in anechoic chamber. The results show that corruption of pulse amplitude (PA) is main cause of DF error. We have proposed two algorithms for resolving the interference by tail rotor blades as below: First, expand the AOA group range for pulse grouping at the first signal analysis phase. Second, merge each of pulse trains with the other, that signal parameter except PRI and AOA is similar, after the first signal analysis phase. The presented method makes it possible to use RWR by reducing interference caused by blade screening in case antenna is screened by tail rotor blades.

• Advances in nano research
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• 제2권1호
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• pp.1-14
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• 2014

Dislocations are basic crystal defects and represent one-dimensional native nanostructures embedded in a perfect crystalline matrix. Their structure is predefined by crystal symmetry. Two-dimensional, self-organized arrays of such nanostructures are realized reproducibly using specific preparation conditions (semiconductor wafer direct bonding). This technique allows separating dislocations up to a few hundred nanometers which enables electrical measurements of only a few, or, in the ideal case, of an individual dislocation. Electrical properties of dislocations in silicon were measured using MOSFETs as test structures. It is shown that an increase of the drain current results for nMOSFETs which is caused by a high concentration of electrons on dislocations in p-type material. The number of electrons on a dislocation is estimated from device simulations. This leads to the conclusion that metallic-like conduction exists along dislocations in this material caused by a one-dimensional carrier confinement. On the other hand, measurements of pMOSFETs prepared in n-type silicon proved the dominant transport of holes along dislocations. The experimentally measured increase of the drain current, however, is here not only caused by an higher hole concentration on these defects but also by an increasing hole mobility along dislocations. All the data proved for the first time the ambipolar behavior of dislocations in silicon. Dislocations in p-type Si form efficient one-dimensional channels for electrons, while dislocations in n-type material cause one-dimensional channels for holes.

• Advances in pediatric surgery
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• 제13권1호
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• pp.61-65
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• 2007

Conventional treatment of Hirschsprung's disease consists of initial colostomy followed by pull-through operation. But, the treatment of Hirschsprung's disease has been changed along with the development of new surgical technique. Since 1995, endo-GIA has been available at our hospital and one stage Duhamel operation has been performed for neonatal Hirschsprung's disease. Between May 1995 and April 2006, 26 neonates have been treated with one stage pull-through operation by one pediatric surgeon at HanYang University Hospital. The sex ratio was 4.2:1 with male predominance. Clinical findings included abdominal distension (96.2 %), vomiting (50.0 %), delayed passage of meconium (46.2 %), constipation (23.1 %), and enterocolitis (15.4 %). Twenty two cases (84.6 %) were short-segment and 4 cases (15.4 %) were long-segment disease, of which 2 cases were total colon aganglionosis. One of the two patients with total colonic aganglionosis had double transition zones - distal ileum and hepatic flexure of the colon. The average age at operation was $14.56{\pm}8.77$ days and the average weight at operation was $3.26{\pm}0.66kg$. Primary Duhamel operations were performed in 25 patients and Soave-Boley operations was performed in one patient. The endo-GIA 35 (Ethicon, USA) was used from 1995 until 1997, and after that endo-GIA 60 (USSC, USA) was used. The average Duhamel operation time was $88.57{\pm}22.80$ minutes. Wound abscess (n = 2) and septum formation (n =1) occurred after Duhamel operation. Bowel function was normalized in 59 % within 3 months and in 95% within 1 year after operation. There was no mortality after one stage pull-through operation in neonate.

• Journal of Radiation Protection and Research
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• 제20권1호
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• pp.37-44
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• 1995

과학기술처의 개인방사선피폭선량평가에 관한 기술기준이 제정된 이후 TLD에 의한 개인피폭선량평가 기술은 많은 발전이 있었으나, 우리나라 대부분의 방사선관련 산업체에서 방사선 피폭관리용으로 사용되고 있는 필름배지의 정확한 선량평가기술을 확보하기 위한 연구는 아직도 미진한 상태이다. 따라서 본 연구에서는 ISO 표준방사선장을 이용하여 i) 실험식에 의한 방법, ii) Degree-of-fit에 의한 방법, 그리고 ) Matrix에 의한 방법으로 필름배지에 의한 선량평가 알고리즘개발방법을 제시하였다. 이러한 방법들에 의한 계산값은 조사량과 ANSI N13.11에서 제시하고 있는 성능지수 이내에서 잘 일치하였으며, 이는 X, ${\gamma}$ 혹은 혼합방사선장에서 선량평가에 유용하게 혼용될 수 있을 것이다.