• 보존과학연구
• /
• 통권33호
• /
• pp.109-124
• /
• 2012

조선초기에서 후기에 이르는 자기 생산지로 유명한 부산 기장군 장안읍 일대에 산재한 도요지 중 신리, 대룡, 하장안, 상장안, 용소, 두명리에서 출토된 상감청자, 백자 및 철화백자 편 등을 대상으로 성분과 미세구조를 분석하였고, 이러한 과학기술적 고찰을 통해 6개 도요지에서 출토된 자기의 태토원료, 제작기법, 번조상황 및 도요지간 상관관계 등을 규명하고자 하였다. 6개 사이트에서 출토된 자기에서 Cristobalite, Mullite, Quarts 등이 검출되었고, 결정구조에 따른 소성 온도는 두명리>상장안>대룡리>하장안>용소리>신리> 순으로 높았음이 확인되었다. 판별분석 결과 신리와 대룡리, 상장안리와 하장안리, 용소리, 두명리로 4개 그룹으로 분류되었다. 시편에 제작에 사용된 태토원료는 4개의 유사한 특성 분포를 가지고 있다. 기장군 도자기의 유약 두께는 $40{\sim}400{\mu}m$로 시유되었고, 기포는 $10{\sim}150{\mu}m$형성된 특징을 나타내고 있다. 태토의 균질성 측면에서도 두명리 출토 시편이 가장 우수한 특성을 나타내고 있는 것으로 밝혀졌다.

• 박물관보존과학
• /
• 제25권
• /
• pp.1-8
• /
• 2021

국립중앙박물관 소장품 청화백자투각연당초팔괘문연적(수정147)을 대상으로 CT 조사를 실시하고 복제품을 제작하여 구조와 제작방법에 대해 살펴보았다. CT 조사를 실시한 결과, 접합선이나 기공이 없는 것으로 보아 하부 동체부 틀을 사용하여 한 번에 찍어 빼낸 후 상부 틀로 찍어 뽑아낸 상부 뚜껑을 서로 접합하였음을 알게 되었다. 특히 하부 동체부의 내기 상면과 연접한 뚜껑 하단면이 서로 접합이 잘 되도록 내면 가운데를 대나무 칼로 거칠게 돌려 깎아 접합면이 누수 되지 않도록 처리하였다. 처음 제작할 당시 물을 담는 연적의 내기(內器)는 도량형 규격에 맞고 틀을 뽑아내기에도 용이한 원통형(圓筒形)으로 만들었을 것으로 짐작되나 상부면과 동체부를 붙이는 과정에서 형태가 사다리꼴로 변형되었을 것으로 여겨진다. 또한 실리콘 복제를 이용하여 원통형 내기로 다시 제작한 후 내기의 용량을 비교 측정한 결과, 3D프린팅을 이용해 복제한 유물 내기의 용량이 152.5㎖인데 반해 원통형 내기의 용량은 대략 168.6㎖로 조선시대 도량형 기준인 '량(量)'의 단위로 3홉(약 174㎖)과 유사하다는 것을 확인 할 수 있었다. 원통형 내기의 용량이 조선 후기 도량형 기준과 부합하므로 실제 도공이 팔괘문연적을 제작할 당시 원통형내기를 가진 연적으로 제작하였을 것으로 생각된다.

• 한국식생활문화학회지
• /
• 제22권6호
• /
• pp.653-664
• /
• 2007

This study intends to consider about the food culture during the latterly Chosun Dynasty through the genre paintings which are depicted realistically about the total food life figures for example not only the foods, but also that people who eat and drink the food and eating implements, eating methods. There are 9 pieces of works Kim hong-do's which are the best appraisal on the incorporated Korean emotion and on the real life of general public. Those are selected for this study's characteristics through the literature consideration. The characteristics of the tableware pottery and food culture are following things. The first is a white porcelain's development and popularization. In the latterly Chosun Dynasty period, the development of the agriculture and commerce made been connected to the affluent food cultures, these made increase the porcelain's use of upper classes and these made been connected to the development of the porcelain's cultures. The second is the development of various pottery with a dark brown glaze manufactures. The development of agriculture and economy power made bring the development of the kinds of sauces and Kimchi culture with an inflow of foreign crops and these made making the large an earthenware pot or jar which could store something during the long time. The third is the development of the small dining table on the eating the bread of idleness. In the Chosun dynasty period, the food style was been unified to he eating the bread of idleness and been lowered. These made developed of various small dining table through the underfloor heating system's generalization. The fourth is the development of the spoon with the soup culture. It is the East Asia called that the spoon culture boundary, this show the characteristic that we use the spoon mainly compare with another countries. Finally, it is universal use of the fixed quantitative implements. They could live quantitative life with the scales which are jar of soy sauce, liquor jug, jar, scoop leading a set of tableware.

• 대한치과의사협회지
• /
• 제49권4호
• /
• pp.203-210
• /
• 2011

The aims of this study were to evaluate the adequate thickness of opaque resins for situations such as an oral black cavity and discolored tooth structure, as well as the translucency of each opaque material at various thicknesses. Six opaque-shade composite resins (Z-350 OA3, Amelogen Universal A2O, Esthet-X A2O, Esthet-X A4O, Charmfil UO and Aelite Universal OA3) were prepared in metal molds with a hole of 8 mm in diameter and various thicknesses (0.5mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0 mm and 4.0mm). Four backgrounds (white tile, black tile, C4 shade porcelain and opaque resin itself) were used to determine the translucency parameter (between black and white backgrounds). and to mimic a black oral cavity (between black and opaque resin backgrounds) and a discolored tooth structure (between C4 and opaque resin backgrounds). Color measurements were made by a colorimeter to determine the CIELAB values of each specimen with each background and to calculate the translucency parameter and ${\Delta}E^*$ value difference among the specimens on the backgrounds. The translucency parameter and ${\Delta}E^*$ obtained between black and opaque resin backgrounds decreased in similar pattern as thickness increased. A C4 background was masked by resin thicknesses of 0.5-1.0mm, while a black background required thicknesses of 1.0-2.0mm. Adequate knowledge about differences in the optical character like translucency of the materials used is essential, together with the accumulated experience of the individual clinician.

• 한국세라믹학회지
• /
• 제22권5호
• /
• pp.47-53
• /
• 1985

In view of innovated utilization of Korean clay resources conventional techniques for pulverization are reviewed in comparison with fluid energy milling processes of fluidized-bed type. Throughout experiment indigenous halloysite ores (white grade) after usual pretreatment are employed as typical sample. It is evidenced that grinding by means of porcelain ball mills has limitation in reducing clay particles to less than 10${\mu}{\textrm}{m}$ in diameter regardless of whether it is processed in dry or wet. Upon use of tungsten carbide bull mill particulation to submicron sizes could be effected with relative ease but severe coloration in grey is attended indicating metallic contamination possibly from friction of the grinding apparatus itself. In contrast the modified fluid en ergy milling enables particulation to $\leq$10${\mu}{\textrm}{m}$ in diameter with simultaneous classification int olimited ranges of particle size distributions. Since this technique is in principle based on the interparticle collisions rather than on the frictions between particles and mill surfaces minimum impurity attendance would be an additional advantage. Evidence leads to the conclusion that the fluidized-bed type milling is regarded as highly effective in puverization as well as fractionation of the clay minerals under examination. This is especially so in contemplating high-value and/or high-purity clay products.

• The Journal of Advanced Prosthodontics
• /
• 제6권6호
• /
• pp.555-558
• /
• 2014

Focal epithelial hyperplasia (FEH) is a human papillomavirus (HPV)-induced alteration of the oral mucosa that presents with a clinically distinct appearance. While other HPV-infected lesions such as squamous papilloma, verruca vulgaris, and condyloma acuminatum involve the skin, oral mucosa, and genital mucosa, FEH occurs only in the oral mucosa. The affected oral mucosa exhibits multiple papules and nodules with each papule/nodule being flat-topped or sessile. The affected region resembles the normal color of oral mucosa rather than appearing as a white color since the epithelial surface is not hyperkeratinized. Almost all cases present with multiple sites of occurrence. This rare, benign epithelial proliferation is related to low-risk HPV, especially HPV-13 and -32, and is not transformed into carcinoma. We report a case of FEH that arose on the attached gingiva of an East Asian male adult related to prosthesis without detection of any HPV subtype in HPV DNA chip and sequencing.

• 한국세라믹학회지
• /
• 제43권10호
• /
• pp.601-606
• /
• 2006

For the purpose of development of red color stain body, bone body which can be fired at 1180$^{\circ}C$ and has a higher degree of whiteness and transmission was developed and a property experiment depending on the content of $Fe_2O_3$ was performed. For manufacturing this body, 9% addition of bone ash to commercialized white body resulted in the best whiteness and proper physical characteristics. In an experiment of oxidized iron addition using this body as a basis, red color stain body fired up to 1150$^{\circ}C$ following the addition of 6% oxidized iron showed physical characteristics such as 5.4R color closer to theory color, 0.08% water absorption rate, 9.1% shrinkage, and 1861 kgf/$cm^2$ bending strength, which implies that this body is suitable for red color stain body.

• 건축역사연구
• /
• 제23권1호
• /
• pp.21-31
• /
• 2014

The paper analyzed the excavational data from Bupyeong-office in Ulsan county in Chosun Dynasty, examined the composition of the community estimated at station community, and studied the duration of the community by using the excavated relics. In addition, the paper compared the excavational data with documentary records, studied the location Bupyeong-office, and investigated the size of station community overall. Community compositions such as buildings, residential place, pits, stoves, hemp kilns, cremation tombs, and farming appliances were identified. When compared to excavated relics such as tiles, white porcelain jars, agrayish-blue-powdered celadons, and celadon porcelains from building, residance, and pits, the community existed during 14C~17C. The station location was on the west side to the quarters for Byongmajuldosa of the Left Gyeongsangdo at King's location according to the old maps and documentary records. It is widely expected that No, 201 foundation stone buildings at Pyungsan relic I was related to the station because there was a distinctions on the stone pillar waterway and high quality of location in the size(the front 9 sections ${\times}$ the side 1 section) and the community. According to the building's functions and duplication relations in the community, it is regarded that there were 33~40 ground buildings, 40~45 pitting buildings, storages or 15~30 other purpose buildings, and 5~7 public buildings around No, 210 building in Bupyeong-office town.

• Acta Via Serica
• /
• 제3권1호
• /
• pp.119-138
• /
• 2018

The dragon of the East was an object of worship and an authority to make rain, unlike the West. The dragon image, one of the positively accepted Chinese motifs with the blue-and-white porcelain of the Ming dynasty by the Ottoman Empire in the 16th century, was combined with gigantic saw-edged leaves to create a genre in Saz style. By combining Eastern dragons with plant motifs instead of clouds, dragons were no longer accepted as authority and nobility but as symbols of life and longevity. Unlike Iran and other countries, the image of dragons in Turkish miniature paintings has evolved into a unique style using Turkish calligraphy. The stylistic feature is that a thick black line that gives the impression of calligraphy forms the dragon's back or a huge saz leaf stalk and forms the axis of the screen. Most of the work was black ink drawing, not painting, and partly lightly painted. In the development stage, the dragon appears as a protagonist on the screen of the early works, but the dragon retreats to the latter half and the saz leaves play a leading role on the screen. A common feature in all paintings, whether early or late, is that they have a militant character and create tension on the screen. From the viewpoint of comparative culture, Turkish dragon miniature drawings of the 16thcentury Ottoman period and the Joseon dynasty are somewhat similar in that they are based on calligraphic character and desire for longevity and loyalty, and are drawn according to certain iconic principles.

• 대한치과보철학회지
• /
• 제46권4호
• /
• pp.409-419
• /
• 2008

연구목적: 인간은 누구나 아름다움을 추구하는 욕망을 가지고 있으며 치의학 분야에서도 심미란 중요한 치료목적 중의 하나이다. 최근에는 부하를 많이 받는 구치부에까지 심미적 요구가 증가됨에 따라 지르코니아를 이용한 코아의 사용이 증가되고 있다. 기본적으로 zirconium oxide의 색상은 흰색-상아색이며, 만약 하부구조물이 이미 인접치의 색조와 조화되어 있다면 색조 부여에 훨씬 유리할 것이며, 원하는 색상을 내기 위하여 필요한 도재층의 두께를 감소시킬 수 있어 더 많은 치질을 보존할 수 있을 것이다. 연구재료 및 방법: 이 연구에서는 현재 임상에서 사용되고 있는 3가지 지르코니아 시스템의 코아 색조 부여 유무와 도재층의 두께가 전부도재관의 색조에 미치는 영향을 알아보기 위하여, 각 시스템의 코아에 색조 부여를 한 실험군과 부여하지 않은 실험군으로 구분하여 코아에 축성한 도재층의 두께에 따른 각각의 색조를 분광측색장치를 이용하여 CIE $L^{*}a^{*}b^{*}$ 색체계를 사용하여 색차를 비교, 분석하였다. 결과: 도재층 0.5 mm 축성시 Lava Frame Zirconia 군과 KaVo Everest Zirconia 군은 코아의 색조 부여 유무에 따라 육안으로 인지 가능한 색조 차이를 보이지 않았으나, Digident CAD/CAM Zirconia 군의 경우 육안으로 인지 가능한 색조차이를 보여 하부 코아의 색조가 충분히 피개되지 못하는 것으로 나타났다. 또한 도재층의 두께를 0.4 mm로 감소시켰을 때 코아 자체에 색조를 부여한 Lava Frame Zirconia 군과 KaVo Everest Zirconia 군의 경우 육안으로 인지 가능한 색조의 차이를 보이지 않았으나, 불투명 도재를 도포한 Digident CAD/CAM Zirconia 군의 경우 육안으로 인지 가능한 색조의 차이를 보였다. 결론: 코아 자체에 색조를 부여할 경우 지르코니아 코아 자체의 색을 피개하기 위해 도포하는 불투명 도재층 축성에 필요한 두께를 감소시킬 수 있어 색조 재현에 더욱 유리하며, 치아의 삭제량을 감소시킬 수 있을 것으로 판단되었다.