• 한국전기전자재료학회논문지
• /
• 제24권5호
• /
• pp.374-380
• /
• 2011

In this paper a printing process for patterning electrodes on large area substrate was developed by combining screen printing with reverse off-set printing. Ag ink was uniformly coated by screen printing. And then etching resist (ER) was patterned in the Ag film by reverse off-set printing, and then the non-desired Ag film was etched off by etchant. Finally, the ER was stripped-off to obtain the final Ag patterns. We extracted the suitable conditions of reverse Using the process we successfully fabricated gate electrodes and scan bus lines of OTFT-backplane used for e-paper, in which the diagonal size was 6 inch, the resolution $320{\times}240$, the minimum line width 30 um, and sheet resistance 1 ${\Omega}/{\Box}$.

• 한국정보과학회논문지:소프트웨어및응용
• /
• 제30권1_2호
• /
• pp.31-39
• /
• 2003

장면 영상 속의 분사 영역에는 다른 부분과는 구분되는 특징적인 공간주파수가 있다. 이 특징은 직관적이며 또한 유용한 정보로서의 가치가 있다. 본 논문에서는 장면 영상에서 수평 텍스트를 찾는 방법을 제안한다. 수직 및 수평 방향으로 걸친 edge 픽셀의 빈도수와 푸리에 변환에 의한 기본 주파수의 두 가지 특징을 이용한 방법이다. 두 가지 특징을 독립적으로 활용하여 그 결과를 결합하거나 연속하여 적용하여 원하는 결과를 얻을 수 있다. 이와 같은 특징은 대체로 언어 또는 문자에 무관함을 확인하였다. 이에 추가하여 Hough 변환을 이용한 장면 속의 사각형을 탐색하였다. 여러 사람들에게 유용한 정보는 보통 강한 색상대비로 눈에 잘 띄는 색깔의 사각형 안에 씌어있는 경우가 보통이므로 사자형의 탐색함으로써 보다 효과적으로 문자를 탐색할 수 있다.

• 한국전기전자재료학회논문지
• /
• 제26권6호
• /
• pp.462-467
• /
• 2013

In this paper, we analyzed the effects of doctoring process on the patterns of Ag ink in gravure off-set printing. The parameters of doctoring process were the angle and the pressure, which was represented by the depth of blade movement to the gravure roll, of doctor blade to the surface of gravure roll, and the angle of patterns engraved on the gravure roll to the doctor blade moving direction. The proper parameters were extracted for the fine patterns and they were 15 mm for the pressure, $60^{\circ}$ for the blade angle. And the angle of patterns with respect to the blade movement should be less than $40^{\circ}$ for the best results. The gravure off-set printing with the above parameters was carried out to print gate electrodes and scan bus lines of OTFT-backplane for e-paper. The line width of $50{\mu}m$ was successfully obtained. The thickness of electrodes was $2.5{\mu}m$ and the surface roughness was $0.65{\mu}m$ and the sheet resistance was $15.8{\Omega}/{\Box}$.

• Maxillofacial Plastic and Reconstructive Surgery
• /
• 제33권6호
• /
• pp.535-539
• /
• 2011

Epidermoid cyst is a cystic form of teratoma and believed to be derived from trapped embryonic cells along the lines of embryonic closure. A 28-year-old woman presented with a painless swelling over the left mandibular area. On panoramic view, the mandible revealed a $5.5{\times}2.0\;cm^2$ multilocular radiolucent lesion of the left mandibular body and a computed tomography scan showed expansion of both the buccal and lingual plates in the same area. Microscopy found stratified squamous epithelium of the cystic wall and cystic contents of keratinized material. The histological diagnosis wasan epidermoid cyst. The most common location of epidermoid cyst at the head and neck is in the orbit (47%), followed by the mouth floor (23%) and the cervical area (9~24%), but in the jaw bone, it is considered very infrequent. We report the uncommon epidermoid cyst in the mandibular body that had a good healing outcome after treatment with a conservative marsupialization during the 40 months follow-up.

• 한국생산제조학회지
• /
• 제24권1호
• /
• pp.135-139
• /
• 2015

We present a fine patterning method of conductive lines on polyimide (PI) and glass substrates using silver (Ag) nanoparticles based on laser scanning. Controlled laser irradiation can realize selective sintering of conductive ink without damaging the substrate. Thus, this technique easily creates fine patterns on heat-sensitive substrates such as flexible plastics. The selective laser sintering of Ag nanoparticles was managed by optimizing the conditions for the laser scan velocity (1.0-20 mm/s) and power (10-150 mW) in order to achieve a small gap size, high electrical conductivity, and fine roughness. The fabricated electrodes had a minimum channel length of $5{\mu}m$ and conductivity of $4.2{\times}10^5S/cm$ (bulk Ag has a conductivity of $6.3{\times}10^5S/cm$) on the PI substrate. This method was used to successfully fabricate an organic field effect transistor with a poly(3-hexylthiophene) channel.

• 한국컴퓨터산업학회논문지
• /
• 제3권7호
• /
• pp.901-914
• /
• 2002

본 논문에서는 비디오에서 입력된 영상으로부터 내용기반 검색을 위해 자동으로 자막을 추출하여 특징 추출을 기반의 단층 연결 신경망 인식기(FE-MCBP)에 의해 자막 문자를 인식하여 영상 자막의 내용을 검출하는 방법을 제시하였다. 비디오에서 자막 추출은 먼저, 비디오에서 일정한 시간 간격으로 획득한 프레임 중에서 히스토그램 분석을 통하여 키 프레임을 찾는 과정을 수행하며, 그 다음에 각각의 키 프레임에 대하여 칼라 세그먼테이션 후 라인 검사 방법 통하여 자막 영역을 추출하도록 하였다. 마지막으로 추출된 자막영역에서 개별문자를 분리하였다. 본 연구에서는 칼라 히스토그램을 분석 후 지역 최대값을 이용하여 세그먼테이션 후 라인 검사를 수행함으로써 처리 속도와 자막영역 검출의 정확도를 개선하였다. 비디오에서 자막 추출은 비디오 정보를 멀티미디어 데이터베이스화하는 초기 단계로 추출된 자막은 바로 문자 인식기의 입력이 된다. 또한 인식된 자막정보는 데이터베이스로 구축되며 내용기반 검색 기법에 의해 검색되도록 하였다.

• 한국측량학회지
• /
• 제17권3호
• /
• pp.293-300
• /
• 1999

IRS-1C PAN의 수치화상데이터를 사용하여 수치표고모델을 생성하는 기법을 연구하였다. 번들조정기법을 적용하여 라인별 외부표정요소를 결정하였으며, 그 결과 위성의 자세와 위치 모두에 있어서 1차다항식이 가장 유효하였다. 수치표고모델과 정사투영화상을 생성한 후, 연구 대상영역내의 상이한 표고를 가지고 있는 16점의 평가점을 선정하여, 연구결과의 지도좌표와 비교해본 결과, 표고오차의 RMSE가 $\pm{16.66m}$인 수치표고 모델을 생성할 수 있었다.

• 건축역사연구
• /
• 제31권1호
• /
• pp.41-50
• /
• 2022

Traditional wooden buildings deform over time and are vulnerable to fire or earthquakes. Therefore, traditional wooden buildings require continuous management and repair, and securing architectural drawings is essential for repair and restoration. Unlike modernized CAD drawings, traditional wooden building drawings scan and store hand-drawn drawings, and in this process, many noise is included due to damage to the drawing itself. These drawings are digitized, but their utilization is poor due to noise. Difficulties in systematic management of traditional wooden buildings are increasing. Noise removal by existing algorithms has limited drawings that can be applied according to noise characteristics and the performance is not uniform. This study presents deep artificial neural network based noised reduction for architectural drawings. Front/side elevation drawings, floor plans, detail drawings of Korean wooden treasure buildings were considered. First, the noise properties of the architectural drawings were learned with both a cycle generative model and heuristic image fusion methods. Consequently, a noise reduction network was trained through supervised learning using training sets prepared using the noise models. The proposed method provided effective removal of noise without deteriorating fine lines in the architectural drawings and it showed good performance for various noise types.

• Radiation Oncology Journal
• /
• 제24권3호
• /
• pp.179-184
• /
• 2006

목 적: 재조합 표피성장인자는(rhEGF) 다양한 표피와 상피 세포의 증식을 자극하는 것으로 알려져 있다. 본 연구에서는 방사선이 조사된 섬유아세포의 증식에 rhEGF의 효과를 알아보고자 하였다. 대상 및 방법: 인간에서 기원한 섬유아세포를 초대배양(primary culture)한 세포를 이용하였다. 대웅제약에서 유전자 재조합하여 대장균에서 발현하여 생산한 rhEGF를 제공 받아 사용하였다. 방사선 조사는 4 MV 선형가속기(CLINAC 600C, Varian, Palo Alto, CA, USA)를 이용하여 분당 2 Gy 내외의 선량률로 균일하게 조사하였다. 조사된 방사선량은 8 Gy이었다. 생존세포수는 trypan blue 염색법을 이용하였고, rhEGF에 의한 세포주기의 변화를 관찰하기 위하여 유세포 분석법을 시행하였다. 결 과: 4 Gy의 방사선을 조사한 후 7일째까지 생존 세포수를 trypan blue 염색법을 이용하여 측정한 결과 모든 rhEGF 농도(1.0 nM, 10 nM, 100 nM, 1,000 nM )에서 방사선 조사 단독군보다 생존세포 수가 많았다. 방사선을 조사하지 않은 섬유아세포에서 rhEGF를 10 nM처리한 후 FACS scan을 시행한 결과 세포주기 중에서 S기 비율이 증가하였다. 결 론: 방사선이 조사된 섬유아세포에서 rhEGF를 투여하면 rhEGF를 투여하지 않은 섬유아세포에 비해서 세포증식이 가속됨을 확인할 수 있었다.

• Molecules and Cells
• /
• 제25권3호
• /
• pp.407-416
• /
• 2008

Thirteen near-isogenic lines (NILs) of japonica rice were developed via a backcross method using the recurrent parent Chucheong, which is of good eating quality but is susceptible to Magnaporthe grisea, and three blast resistant japonica donors, Seolak, Daeseong and Bongkwang. The agro-morphological traits of these NILs, such as heading date, culm length, and panicle length, were similar to those of Chucheong. In a genome-wide scan using 158 SSR markers, chromosome segments of Chucheong were identified in most polymorphic regions of the 13 NIL plants, and only a few chromosome segments were found to have been substituted by donor alleles. The genetic similarities of the 13 NILs to the recurrent parent Chucheong averaged 0.961, with a range of 0.932-0.984. Analysis of 13 major blast resistance (R) genes in these lines using specific DNA markers showed that each NIL appeared to contain some combination of the four R genes, Pib, Pii, Pik-m and Pita-2, with the first three genes being present in each line. Screening of nine M. grisea isolates revealed that one NIL M7 was resistant to all nine isolates; the remaining NILs were each resistant to between three and seven isolates, except for NIL M106, which was resistant to only two isolates. In a blast nursery experiment, all the NILs proved to be more resistant than Chucheong. These newly developed NILs have potential as commercial rice varieties because of their increased resistance to M. grisea combined with the desirable agronomic traits of Chucheong. They also provide material for studying the genetic basis of blast resistance.