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        忠州 淨土寺 弘法國師 實相塔과 塔碑의 移轉 建立 經過와 相輪部 部材의 保存科學的 調査

        양희정,황현성 국립중앙박물관 2016 미술자료 Vol.- No.90

        충주 淨土寺에 세워졌던 弘法國師 實相塔과 塔碑는 1915년 10월 경복궁 경내로 옮겨졌다. 朝 鮮物産共進會에 출품할 목적으로 이동시킨 것으로 추정되는데 실상탑은 경복궁으로 옮겨지기 전에 충주 군청 뜰로 이동한 이력이 있다. 실상탑과 탑비는 共進會 美術館(이후 總督府博物館)의 동측에 계속 있다가, 경복궁 복원 계획에 따라서 탑과 탑비가 있는 東宮 지역 중건이 추진되면서 1996년에 해체되어 수장고에 격납되었다. 이후 소장·관리 기관인 국립중앙박물관이 용산으로 이전한 뒤 취약한 표면 상태 때문에 보존처리를 거쳐야 했던 탑과 탑비는 다른 석조물에 비해 늦게 재건립이 이루어졌다. 건립에 앞서 2년 동안 문화재의 안전을 위해 건립 예정 부지의 구조 안전성, 주변 진동의 영향, 應力, 地盤, 風荷重에 대한 안정성을 확인하였고, 부재의 강도를 높이고 표면 부식을 막기 위해 세척과 강화처리를 실시하였다. 건립 시 각 부재의 방향과 사용 범위는 경복궁에 이전 건립되었을 때의 모습을 기준으로 하되, 습기와 침하를 방지하는 보호 방안 수립을 최우선으로 삼았다. 한편 국립중앙박물관의 수장고에 있는 미정리 석조 문화재를 조사하는 과정에서 홍법국사 실상탑 相輪部 部材를 확인하였다. 이에 따라 이 부재가 1960년대까지 전시되었던 것과 동일한 부재인지 확인하기 위해 부재의 3차원 스캔 자료와 과거에 촬영된 유리건판 사진을 비교하였다. 그리고 정밀 육안관찰, 휴대용 실체현미경을 이용한 造巖鑛物 관찰, 全巖帶磁率 분석을 통한 磁化强度 測定, X-선 회절분석, 주사전자현미경-에너지분산형분광분석(SEM-EDS)을 통해 암석학적 분석을 행하였다. 그 결과, 사진 자료로 확인되는 실상탑 상륜부와 발견 부재가 동일한 형태이며, 실상탑 탑신을 구성하는 암종과 같은 재질적 특성을 갖는다는 점을 확인하였다. 실상탑의 상륜부는 간행된 출판물을 기준으로 1961~1967년 사이에 전시에서 제외되었다. 半破된 부재의 구조 때문에 안전상의 이유로 별도 보관하려 했기 때문으로 추정된다. 이번에 실시한 상륜부 부재에 대한 다각적인 조사가 향후 상륜부 부재의 완형 복원과 재설치 가능성에 토대가 될것으로 기대한다. The stupa and stele that had originally been erected for State Preceptor Hongbeop at the Jeongtosa (淨土寺) Temple site in Chungju, Chungcheongbuk-do were relocated to the grounds of Gyeongbokgung Palace in October 1915. It is assumed that they were moved in order to be presented in the Joseon Products Exposition (朝鮮物産共進會, Kr. Joseon Mulsan Gongjinhoe). Prior to its arrival at Gyeongbokgung Palace, the stupa once before had been moved to the courtyard of Chungju district office. The stupa and the stele were installed to the east of the Art Museum of the Exposition (that later became the Joseon Government-General Museum) until 1996, when they were disassembled and placed in storage at the museum so that reconstruction of Donggung (Palace of the Crown Prince) could begin as part of a Gyeongbokgung Palace restoration project. Upon the relocation of the National Museum of Korea to Yongsan, restoration work was called upon to preserve their brittle surface. This led them to being reconstructed later than other pagodas and stupas. For two years before their reassemblage, the site reserved for the stupa and stele was checked for its structural integrity, as well as stability against vibration, stress, ground stability and wind load for any potential threat to the safety of the heritage. Cleaning and strengthening of the stupa and stele were also conducted in order to improve the strength of their component and to prevent surface corrosion. The direction and range of the use of each component followed the arrangement of the previous structures when they were located at Gyeongbokgung Palace. However, the first priority was given to devising a protection policy to prevent potential damage from humidity and subsidence. In the meanwhile, the National Museum of Korea was also carrying out an examination of stoneworks that had not been registered, and this survey helped the re-identification of the finial part of the stupa of State Preceptor Hongbeop from the Jeongtosa Temple. 3D scan results were compared with old dry-plate glass photographs to assure that the finial part was the one that had been exhibited atop the stupa until the 1960s. Furthermore, studies and tests were carried out through macroscopy; portable stereoscopic examination of the mineral content of the rocks, measurement of magnetization intensity through “whole-rock magnetic susceptibility (全巖帶磁率)” analysis, X-ray diffraction analysis, and lithological analysis through SEM-EDS. It was confirmed that the finial part found in the storage matched the finial of the stupa in the photos, and that it also shared the same lithological properties as the stupa’s main body. Publications show that the finial of the stupa had been removed from display sometime between 1961 and 1967. It is assumed that it had to be removed for safety reasons due to partial damage of the structure. The recent multilateral examination of the finial is expected to strengthen the possibilities for restoration and reinstallation of the stupa in its entirety in the future.

      • KCI등재
      • KCI등재

        TFT-LCDs 게이트 전극에 적용한 Cu(Mg) 합금 박막의 건식식각

        양희정,이재갑,Yang Heejung,Lee Jaegab 한국재료학회 2004 한국재료학회지 Vol.14 No.1

        The annealing of a Cu(4.5at.% Mg)/$SiO_2$/Si structure in ambient $O_2$, at 10 mTorr, and $300-500^{\circ}C$, allows for the outdiffusion of the Mg to the Cu surface, forming a thin MgO (15 nm) layer on the surface. The surface MgO layer was patterned, and successfully served as a hard mask, for the subsequent dry etching of the underlying Mg-depleted Cu films using an $O_2$ plasma and hexafluoroacetylacetone [H(hfac)] chemistry. The resultant MgO/Cu structure, with a taper slope of about $30^{\circ}C$ shows the feasibility of the dry etching of Cu(Mg) alloy films using a surface MgO mask scheme. A dry-etched Cu(4.5at.% Mg) gate a-Si:H TFT has a field effect mobility of 0.86 $\textrm{cm}^2$/Vs, a subthreshold swing of 1.08 V/dec, and a threshold voltage of 5.7 V. A novel process for the dry etching of Cu(Mg) alloy films, which eliminates the use of a hard mask, such as Ti, and results in a reduction in the process steps is reported for the first time in this work.

      • KCI등재

        빛간섭단층혈관조영술을 이용하여 측정한 백내장수술 전후 망막중심오목무혈관부위의 변화

        양희정,김기석 대한안과학회 2020 대한안과학회지 Vol.61 No.5

        Purpose: To report changes in the foveal avascular zone (FAZ) after uncomplicated cataract surgery using optical coherence tomography (OCT) angiography. Methods: The present study evaluated 39 eyes that underwent cataract surgery between April 2019 and June 2019. Central macular thickness (CMT) and subfoveal choroidal thickness (SFCT) were measured by OCT. The area of the FAZ in the superficial vascular complex (SVC) and deep vascular complex (DVC) were measured using OCT angiography. Results: In all eyes, except for five with cystoid macular edema, there was a statistically significant change in the CMT over time (p < 0.0001), and the CMT at 1 month postoperatively was significantly thicker than the preoperative CMT (p = 0.005). The SFCT was significantly thicker at 1 week and 1 month postoperatively relative to the preoperative values (p < 0.0001 and p = 0.004, respectively). The FAZ area in the SVC and DVC decreased significantly at 1 week and 1 month postoperatively compared with the preoperative values (p < 0.0001 and p = 0.007, respectively). In the five eyes that developed cystoid macular edema, the area of the FAZ in the DVC showed a significant increase at 1 month postoperatively compared with the preoperative value (p = 0.028). Conclusions: The FAZ area in the SVC and DVC decreased postoperatively, suggesting that cataract surgery may affect perfusion in the macula. 목적: 빛간섭단층혈관조영술을 이용하여 백내장수술 전후 망막중심오목무혈관부위의 변화에 대하여 알아보고자 하였다. 대상과 방법: 2019년 4월부터 2019년 6월까지 본원에서 백내장수술을 받은 39명 39안의 의무기록을 후향적으로 조사하였다. 술 전, 술 후 1주일, 술 후 1개월에 빛간섭단층촬영을 이용하여 중심황반두께 및 중심와밑 맥락막두께를 측정하였으며 빛간섭단층혈관조영술을 이용하여 표층혈관총과 심층혈관총에서의 망막중심오목무혈관부위의 면적을 측정하였다. 결과: 총 39안 중 낭포황반부종이 발생한 5안을 제외한 34안의 중심황반두께는 시간에 따른 유의한 변화가 있었으며(p<0.0001) 술 후 1개월에 술 전보다 유의하게 증가하였다(p=0.005). 중심와밑 맥락막두께는 시간에 따른 유의한 변화가 있었으며(p<0.0001) 술 후 1주일, 술 후 1개월에 술 전보다 증가하였다(p<0.0001, p=0.004). 표층혈관총과 심층혈관총의 망막중심오목무혈관부위의 면적 역시 시간에 따른 유의한 변화가 있었으며(p<0.0001), 술 후 1주일에 술 전보다 감소한 소견을 보였다(p<0.0001, p=0.007). 낭포황반부종이 발생한 5안에서 망막중심오목무혈관부위의 면적은 심층혈관총에서 시간에 따른 유의한 변화를 보였으며(p=0.028) 술 후 1개월에 술 전보다 증가하는 양상을 보였다. 결론: 백내장수술 후 표층 및 심층혈관총에서 중심오목무혈관부위의 감소 소견이 관찰되었다. 이는 백내장수술 후 회복 과정에서 황반 중심와의 관류에 변화가 있을 수 있음을 시사한다.

      • KCI등재
      • KCI등재

        Selective Deposition of Co Thin Films for TFT Gate Electrode by Non-OpticMethod; Micro-Contact Printing and MOCVD

        양희정,희정 양,신현정 한국물리학회 2005 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.47 No.3

        Selective deposition of Co thin films for a TFT gate electrode is carried out by growth with a combination of micro-contact printing and metal organic chemical vapor deposition (MOCVD) at low temperature below 100 C. An octadecyltrichlorosilane (OTS) layer of long chain defined with polydimethylsiloxane (PDMS) stamps was pre-patterned onglass. The patterned OTS area has hydrophobic characteristics while surface on glass has hydrophobic characteristics. The MOCVD Co selective deposition is focused on the difference of incubation time for the react on between functional group and Co precursor. We optimize selective conditions of Co deposition for a gate electrode to reduce the photo mask level. Root mean square (rms) of Co films deposited is 2 nm, enough to use as gate electrode possessing a smooth surface. OTS pattern is decomposed by UV treatment in the range of 280 to 350 nm and then trilayer is continuously created on the sample, which is selectively organized asCo gate electrode on glass. We fabricate a thin film transistor (TFT) of inverse staggered type by using this sample. Reflectance is used to evaluate incubation time for Co deposition and AFM isemployed to confirm the selectivity of Co thin film. The subthreshold slope and on/off current ratio are 0.88 V/decade and 6 × 106, respectively. The electron field-effect mobility at saturation is 0.35 cm2/Vs for Vd = 9 V.

      • SCIEKCI등재

        사과 겹무늬썩음병에 걸린 가지로부터 분산되는 병포자의 정량적 조사법 개발

        양희정,최창희,우현,김대희,엄재열,Yang, Hee-Jung,Choi, Chang-Hee,Woo, Hyun,Kim, Dai-Hee,Uhm, Jae-Youl 한국식물병리학회 1998 Plant Pathology Journal Vol.14 No.4

        On the basis of the fact that the pycnidiospore of Botryosphaeria dothidea, the causal fungus of apple white rot is a typical water borne spore, a method for quantitative analysis of pycnidiospore dispersal from the warts produced on the diseased apple tree stem was developed. The warts on which cracks developed either on or around them were cut off at the base, and shaked in the water for 4hours at 2$0^{\circ}C$, in which condition the maximum number of spores were released. The volume of shaking solution was calculated as 1 ml per one wart. At the end of shaking, Trio, a household detergent was added to the shaking solution to the concentration of 0.1%, and shaked for additional 10 minutes at 35$^{\circ}C$ to take off the spores attached on the glass ware. One milliliter of the spore suspension thus prepared were passed through transparent membrane filter (pore size : 3.0 ${\mu}{\textrm}{m}$), and the spores attached on the filter were counted under a microscope ($\times$200) after staining them with lactophenol supplemented with aniline blue. The results thus obtained were statistically consistent when at least 30 warts were used simultaneously in single shaking. This method can be applicable in the elucidation of ecology of sporulation and spore dispersal, and also in the screening of the sporulation inhibitor which can be used in the control of the disease by reducing the inoculum density.

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