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Design Optimization of Duplex Burnable Poison Rods and Feasibility Evaluation for Core Design (이중구조 가연성독봉 설계안의 최적화 및 노심 핵설계 타당성 평가)

  • Yoon Seok-Kyun;Lee Dae-Jin;Kim Myung-Hyun
    • Journal of Energy Engineering
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    • v.13 no.4
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    • pp.242-258
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    • 2004
  • The duplex burnable poison absorbers concept was suggested by Korea Atomic Energy Research Institute. This BP rod is composed of inner region of natural U-Gd$_2$O$_3$ and outer shell of enriched UO$_2$-Er$_2$O$_3$. It is expected that this burnable absorber has same reactivity control capability with gadolinia burnable absorber used in extened fuel cycle. In order to evaluate the nuclear feasibility of duplex BPs, the nuclear design characteristics were compared with that of four types of burnable absorbers; gadolinia, erbia, IFBA, dysprosia duplex BP on 24 months fuel cycle for Korean Standard Nuclear Power plants. According to the evaluation results of nuclear characteristics, the duplex BPs were better than other BPs on k-infinitives, reactivity holddown worth (RHW), pin power peaking and moderator temperature coefficient (MTC). The possibility of nuclear core design was also confirmed based on the optimized fuel assemblies which were searched for a sensitivity analysis. Characteristics of core design with duplex BPs was compared with that of reference core with gadolinia BPs for cycle length, power peaking and MTC. The duplex BP core had a little longer cycle length by 4 to 7 days because of increased amount of fissile in enriched uranium at the outer shell of duplex BP In case of power peaking F$\_$Q/ of duplex BP core was reduced from 1.5773 to 1.5335. MTC was also less -0.48 pcm/C than that of reference core. Finally, evaluation of fuel cycle economy was performed for the manufacturing feasibility test and fuel cost evaluation with duplex BPs. Fuel cycle economy of duplex BP core almost was equivalent with that of gadolinia BP core.

Dasan Cheong Yagyong's perspectives on The Shoo King(『書經』) (다산의 『서경(書經)』인식)

  • Lim, Heon-gyu
    • (The)Study of the Eastern Classic
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    • no.59
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    • pp.297-324
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    • 2015
  • This article discusses Dasan Cheong Yagyong(1762-1836)'s perspectives on The Book of historical documents("書經"). Dasan Cheong Yagyong considered The Shoo King as The Book of historical documents presented Ideas of Confucian Politics in ancient China. Many Scholar and Kings dispersed and re-edition The Shoo King as historical documents. Dasan Cheong Yagyong analyzed, de-constructed, and reinterpretations documents of dominant The Shoo King. Dasan Cheong Yagyong tried to recover the original documents The Shoo King. Dasan Cheong Yagyong collected dispersed material of The Shoo King, and complied the original documents. Dasan Cheong Yagyong wrote four book of The Shoo King. Dasan want to reconstruct the new theory by these reinterpretations of The Book of historical documents presented Ideas of Confucian Politics in ancient China, and to open new era.

헤이안쿄[平安京]의 변용과 중세 초기 정권도시

  • 오노 마사토시
    • Korean Journal of Heritage: History & Science
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    • v.46 no.1
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    • pp.4-31
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    • 2013
  • 본고는 중세도시연구의 관점에서 도성 헤이안쿄(平安京)가 중세 교토(京都)로 변화하는 계기와 그 의미, 그것이 새로운 무가(武家) 정권도시(政權都市)에 어떤 영향을 미쳤는지에 대하여 논하였다. 율령제 마지막 도성인 헤이안쿄는 천황을 절대적 정점으로 한 중앙집권이 동심원구조로 구현된 '왕성(王城)의 땅'이었으나, 10세기 후반 이후 도성의 구심점이었던 내리(內裏)가 헤이안큐(平安宮) 밖으로 나오는 등의 변화가 시작되었고, 도성의 이념과 틀이 급속하게 해체 변용되었다. 또 고대왕권을 대신하여 새로운 형태로 왕권과 여러 권력을 담당한 원(院)과 롱관가(瀧關家), 대두하는 무가권력 등이 그 본거지에 권력의 개성과 시대성을 반영한 새로운 경관과 공간원리를 생성하였다. 그것은 다음과 같은 공통점을 갖는다. (1) 큰 정토정원을 갖는 御堂(사찰)과 세트를 이룬 御所(천황의 거소). (2)황통(천황가 내의 계통)과 가족의 상징으로서 조상을 모신 분묘를 중심으로 한 도시형성. (3) 내리를 기점으로 남북으로 주축을 갖는 고대도성과 달리, 어당과 어소가 동서로 배열된 동서가로를 주축으로 한 도시계획. (4) 수도와 외부를 잇는 교통의 결절점에 입지하였고, 특히 하천변을 향해 적극적으로 확장된 도시. 일본 중세는 무가정권의 시대를 맞이하여 도고쿠(東國) 초기 무가정권의 본거지 히라이즈미(平泉)와 최초의 막부가 열린 가마쿠라(鎌倉)가 모델로 한 것은 '도성 헤이안큐'가 아니라 헤이안큐 수도 밖 신도시의 경관과 공간원리였다. 특히 히라이즈미와 가마쿠라 등이 가정기관(家政機關)과 조상의 묘를 중심으로 한 '가족 원리'에 따른 정권도시를 적극적으로 수용한 것은 단순한 도시의 모방이 아니라 주종관계를 축으로 의제적인 '집(家) 원리'로 권력이 형성된 무가에는 더욱 어울리는 논리이며, 또 고대와는 다른 새로운 시대의 논리였기 때문이다. 그 한편으로 무가의 대들보로서 무사들에 의해 추대된 초기 무가정권은 도시의 논리와 경관을 도입하였을 뿐 아니라 그들과 공통의 가치관을 표현하는 것도 중요한 요소였다. 그것이 최신의 도시를 모방한 어당과, 그것과는 대조적인 도고쿠 무가의 전통적인 어소의 병립이라는 종교공간과 정치 일상공간에서의 권위표상의 의식적인 분리에 의해 표현되었다. 히라이즈미와 가마쿠라에서는 유통, 상공업 등의 도시기능과 도시적인 경관이 정비되기까지 약 50년의 시간이 경과할 필요가 있었다. 12세기 일본의 무가정권은 스스로의 거점으로서 도시를 기획, 형성하는 의식과 실현하는 능력을 얼마나 가지고 있었는가 검토가 필요하다. 명확한 동아시아모델의 도성을 실현함으로써 왕권의 존재를 드러낸 고대 율령정권과의 차이점은 매우 크다. 이후 무가가 권력의 의도를 도시구조로서 명확하게 드러낸 것은 15세기 후반의 전국시대 다이묘(大名)의 죠카마치(城下町)로부터이다. 특히 16세기 후반부터 천하통일을 실현한 오다 노부나가, 도요토미 히데요시의 연합정권에서는 구체적인 성(城)과, 그 성을 중심으로 한 계층성을 명시한 죠카마치의 공간설계가 있었다. 여기서는 다시금 '도시의 경관'이 명확한 권력의 상징으로서 기능하게 된 것이다.

Anisotrpic radar crosshole tomography and its applications (이방성 레이다 시추공 토모그래피와 그 응용)

  • Kim Jung-Ho;Cho Seong-Jun;Yi Myeong-Jong
    • 한국지구물리탐사학회:학술대회논문집
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    • 2005.09a
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    • pp.21-36
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    • 2005
  • Although the main geology of Korea consists of granite and gneiss, it Is not uncommon to encounter anisotropy Phenomena in crosshole radar tomography even when the basement is crystalline rock. To solve the anisotropy Problem, we have developed and continuously upgraded an anisotropic inversion algorithm assuming a heterogeneous elliptic anisotropy to reconstruct three kinds of tomograms: tomograms of maximum and minimum velocities, and of the direction of the symmetry axis. In this paper, we discuss the developed algorithm and introduce some case histories on the application of anisotropic radar tomography in Korea. The first two case histories were conducted for the construction of infrastructure, and their main objective was to locate cavities in limestone. The last two were performed In a granite and gneiss area. The anisotropy in the granite area was caused by fine fissures aligned in the same direction, while that in the gneiss and limestone area by the alignment of the constituent minerals. Through these case histories we showed that the anisotropic characteristic itself gives us additional important information for understanding the internal status of basement rock. In particular, the anisotropy ratio defined by the normalized difference between maximum and minimum velocities as well as the direction of maximum velocity are helpful to interpret the borehole radar tomogram.

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Evaluation of dose delivery accuracy due to variation in pitch and roll (세기변조방사선치료에서 Pitch와 Roll 변화에 따른 선량전달 정확성 평가)

  • Jeong, Chang Young;Bae, Sun Myung;Lee, Dong Hyung;Min, Soon Ki;Kang, Tae Young;Baek, Geum Mun
    • The Journal of Korean Society for Radiation Therapy
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    • v.26 no.2
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    • pp.239-245
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    • 2014
  • Purpose : The purpose of this study is to verify the accuracy of dose delivery according to the pitch and roll rotational setup error with 6D robotic couch in Intensity Modulated Radiation Therapy (IMRT) for pelvic region in patients. Materials and Methods : Trilogy(Varian, USA) and 6D robotic couch(ProturaTM 1.4, CIVCO, USA) were used to measure and analyze the rotational setup error of 14 patients (157 setup cases) for pelvic region. The total 157 Images(CBCT 78, Radiography 79) were used to calculate the mean value and the incidence of pitch and roll rotational setup error with Microsoft Office Excel 2007. The measured data (3 mm, 3%) at the reference angle ($0^{\circ}$) without couch rotation of pitch and roll direction was compared to the others at different pitch and roll angles ($1^{\circ}$, $1.5^{\circ}$, $2^{\circ}$, $2.5^{\circ}$) to verify the accuracy of dose delivery by using 2D array ionization chamber (I'mRT Matrixx, IBA Dosimetry, Germany) and MultiCube Phantom(IBA Dosimetry, Germany). Result from the data, gamma index was evaluated. Results : The mean values of pitch and roll rotational setup error were $0.9^{\circ}{\pm}0.7$, $0.5^{\circ}{\pm}0.6$. The maximum values of them were $2.8^{\circ}$, $2.0^{\circ}$. All of the minimum values were zero. The mean values of gamma pass rate at four different pitch angles ($1^{\circ}$, $1.5^{\circ}$, $2^{\circ}$, $2.5^{\circ}$) were 97.75%, 96.65%, 94.38% and 90.91%. The mean values of gamma pass rate at four different roll angles ($1^{\circ}$, $1.5^{\circ}$, $2^{\circ}$, $2.5^{\circ}$) were 93.68%, 93.05%, 87.77% and 84.96%. when the same angles ($1^{\circ}$, $1.5^{\circ}$, $2^{\circ}$) of pitch and roll were applied simultaneously, The mean values of each angle were 94.90%, 92.37% and 87.88%, respectively. Conclusion : As a result of this study, it was able to recognize that the accuracy of dose delivered is lowered gradually as pitch and roll increases. In order to increase the accuracy of delivered dose, therefore, it is recommended to perform IGRT or correct patient's position in the pitch and roll direction, to improve the quality of treatment.

A Study on the fantasy of Disney animation (<겨울왕국>을 통해 본 디즈니 애니메이션의 환상성)

  • Lee, Hye-Won;Kim, Min-Jung
    • Cartoon and Animation Studies
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    • s.35
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    • pp.107-128
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    • 2014
  • Cultural Content industries based on imagination and creativity are attracting attention and the animation high value-added industry is still spotlighted. Among them, Disney Studios make money through using their professional skills. There are the know-how has developed for a long time, and there are timeless strategy. This study is analyzing by fantasy elements for knowing the messages of Disney animation. Fantasy defined as genre of literature by Todorov and Jackson emphasized its social role and significance. Hume expanded the area of fantasy and Tolkein Jahoriski and Boyer classified the fantasy according to the purpose. Through the analyzing Disney animation , Disney's fantasy show the specific expression depending on the target. Disney is based on the three types of fantasy depending on the growth of the journey. The first area is composed of the main character's growth and satisfy the desire and escapism, The second is the word of antagonist who opposed to reality and break the rules of the dominant ideology. The last area is the utopia provided after hero beat the antagonist. Disney characters give the messages by using the fantasy like the transformation or alter ego. That show the subject of the main character's growth and the supporting characters as the expression of the multiple personality of main. These emphasize the hero's growth and give the fun. Also, in the subject of the otherness, the hero always destroy the evil who broke the rules of reality. In this way, the fantasy offered by Disney give the messages of sacrifice and family from true love. Disney has the support of their target audiences continue to be able to convey ideology.

New Trends in the Production of One Hundred Fans Paintings in the Late Joseon Period: The One Hundred Fans Painting in the Museum am Rothenbaum Kulturen und Künste der Welt in Germany and Its Original Drawings at the National Museum of Korea (조선말기 백선도(百扇圖)의 새로운 제작경향 - 독일 로텐바움세계문화예술박물관 소장 <백선도(百扇圖)>와 국립중앙박물관 소장 <백선도(百扇圖) 초본(草本)>을 중심으로 -)

  • Kwon, Hyeeun
    • MISULJARYO - National Museum of Korea Art Journal
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    • v.96
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    • pp.239-260
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    • 2019
  • This paper examines the circulation and dissemination of painting during and after the nineteenth century through a case study on the One Hundred Fans paintings produced as decorative folding screens at the time. One Hundred Fans paintings refer to depictions of layers of fans in various shapes on which pictures of diverse themes are drawn. Fans and paintings on fans were depicted on paintings before the nineteenth century. However, it was in the nineteenth century that they began to be applied as subject matter for decorative paintings. Reflecting the trend of enjoying extravagant hobbies, fans and paintings on fans were mainly produced as folding screens. The folding screen of One Hundred Fans from the collection of the Museum am Rothenbaum Kulturen und Künste der Welt (hereafter Rothenbaum Museum) in Germany was first introduced to Korean in the exhibition The City in Art, Art in the City held at the National Museum of Korea in 2016. Each panel in this six-panel folding screen features more than five different fans painted with diverse topics. This folding screen is of particular significance since the National Museum of Korea holds the original drawings. In the nineteenth century, calligraphy and painting that had formerly been enjoyed by Joseon royal family members and the nobility in private spaces began to spread among common people and was distributed through markets. In accordance with the trend of adorning households, colorful decorative paintings were preferred, leading to the popularization of the production of One Hundred Fans folding screens with pictures in different shapes and themes. A majority of the Korean collection in the Rothenbaum Museum belonged to Heinrich Constantin Eduard Meyer(1841~1926), a German businessman who served as the Joseon consul general in Germany. From the late 1890s until 1905, Meyer traveled back and forth between Joseon and Germany and collected a wide range of Korean artifacts. After returning to Germany, he sequentially donated his collections, including One Hundred Fans, to the Rothenbaum Museum. Folding screens like One Hundred Fans with their fresh and decorative beauty may have attracted the attention of foreigners living in Joseon. The One Hundred Fans at the Rothenbaum Museum is an intriguing work in that during its treatment, a piece of paper with the inscription of the place name "Donghyeon" was found pasted upside down on the back of the second panel. Donghyeon was situated in between Euljiro 1-ga and Euljiro 2-ga in present-day Seoul. During the Joseon Dynasty, a domestic handicraft industry boomed in the area based on licensed shops and government offices, including the Dohwaseo (Royal Bureau of Painting), Hyeminseo (Royal Bureau of Public Dispensary), and Jangagwon (Royal Bureau of Music). In fact, in the early 1900s, shops selling calligraphy and painting existed in Donghyeon. Thus, it is very likely that the shops where Meyer purchased his collection of calligraphy and painting were located in Donghyeon. The six-panel folding screen One Hundred Fans in the collection of the Rothenbaum Museum is thought to have acquired its present form during a process of restoring Korean artifacts works in the 1980s. The original drawings of One Hundred Fans currently housed in the National Museum of Korea was acquired by the National Folk Museum of Korea between 1945 and 1950. Among the seven drawings of the painting, six indicate the order of their panels in the margins, which relates that the painting was originally an eight-panel folding screen. Each drawing shows more than five different fans. The details of these fans, including small decorations and patterns on the ribs, are realistically depicted. The names of the colors to be applied, including 'red ocher', 'red', 'ink', and 'blue', are written on most of the fans, while some are left empty or 'oil' is indicated on them. Ten fans have sketches of flowers, plants, and insects or historical figures. A comparison between these drawings and the folding screen of One Hundred Fans at the Rothenbaum Museum has revealed that their size and proportion are identical. This shows that the Rothenbaum Museum painting follows the directions set forth in the original drawings. The fans on the folding screen of One Hundred Fans at the Rothenbaum Museum are painted with images on diverse themes, including landscapes, narrative figures, birds and flowers, birds and animals, plants and insects, and fish and crabs. In particular, flowers and butterflies and fish and crabs were popular themes favored by nineteenth century Joseon painters. It is noteworthy that the folding screen One Hundred Fans at the Rothenbaum Museum includes several scenes recalling the typical painting style of Kim Hong-do, unlike other folding screens of One Hundred Fans or Various Paintings and Calligraphy. As a case in point, the theme of "Elegant Gathering in the Western Garden" is depicted in the Rothenbaum folding screen even though it is not commonly included in folding screens of One Hundred Fans or One Hundred Paintings due to spatial limitations. The scene of "Elegant Gathering in the Western Garden" in the Rothenbaum folding screen bears a resemblance to Kim Hong-do's folding screen of Elegant Gathering in the Western Garden at the National Museum of Korea in terms of its composition and style. Moreover, a few scenes on the Rothenbaum folding screen are similar to examples in the Painting Album of Byeongjin Year produced by Kim Hong-do in 1796. The painter who drew the fan paintings on the Rothenbaum folding screen is presumed to have been influenced by Kim Hong-do since the fan paintings of a landscape similar to Sainsam Rock, an Elegant Gathering in the Western Garden, and a Pair of Pheasants are all reminiscent of Kim's style. These paintings in the style of Kim Hong-do are reproduced on the fans left empty in the original drawings. The figure who produced both the original drawings and fan paintings appears to have been a professional painter influenced by Kim Hong-do. He might have appreciated Kim's Painting Album of Byeongjin Year or created duplicates of Painting Album of Byeongjin Year for circulation in the art market. We have so far identified about ten folding screens remaining with the One Hundred Fans. The composition of these folding screens are similar each other except for a slight difference in the number and proportion of the fans or reversed left and right sides of the fans. Such uniform composition can be also found in the paintings of scholar's accoutrements in the nineteenth century. This suggests that the increasing demand for calligraphy and painting in the nineteenth century led to the application of manuals for the mass production of decorative paintings. As the demand for colorful decorative folding screens with intricate designs increased from the nineteenth century, original drawings began to be used as models for producing various paintings. These were fully utilized when making large-scale folding screens with images such as Guo Ziyi's Enjoyment-of-Life Banquet, Banquet of the Queen Mother of the West, One Hundred Children, and the Sun, Cranes and Heavenly Peaches, all of which entailed complicated patterns. In fact, several designs repeatedly emerge in the extant folding screens, suggesting the use of original drawings as models. A tendency toward using original drawings as models for producing folding screens in large quantities in accordance with market demand is reflected in the production of the folding screens of One Hundred Fans filled with fans in different shapes and fan paintings on diverse themes. In the case of the folding screens of One Hundred Paintings, bordering frames are drawn first and then various paintings are executed inside the frames. In folding screens of One Hundred Fans, however, fans in diverse forms were drawn first. Accordingly, it must have been difficult to produce them in bulk. Existing examples are relatively fewer than other folding screens. As discussed above, the folding screen of One Hundred Fans at the Rothenbaum Museum and its original drawings at the National Museum of Korea aptly demonstrate the late Joseon painting trend of embracing and employing new painting styles. Further in-depth research into the Rothenbaum painting is required in that it is a rare example exhibiting the influence of Kim Hong-do compared to other paintings on the theme of One Hundred Fans whose composition and painting style are more similar to those found in the work of Bak Gi-jun.