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김영철(Young Chol Kim),박용주(Yong Ju Park),김두섭(Doo Sub Kim),홍득민(Duk Min Hong),양윤식(Yoon Shig Yang),심원보(Won Bo Shim),윤중근(Jung Geun Yoon),김종인(Jong In Kim),이성주(Seong Joo Lee),이태원(Tae Won Lee) 대한내과학회 1991 대한내과학회지 Vol.41 No.6
N/A Seventy-five patients with either pulmonary nodules or masses that could not be confirmed with sputum examination or bronchoscopic examination underwent transthoracic fineneedle aspiration with 22 or 23 gauze needles under fluoroscopy for cytologic diagnosis. There were 51 men and 24 women, and the age range was 43-78 years old. The lesion distribution and sizes were as follow: 48 cases in the right lung, 2l cases in the left lung, 23 cases under 4 cm in size, and 52 cases over 4 cm in size. There were no meaningful correlations in lesion size or site with malignant or benign cytologic findings. Among the 46 malignant cases squamous cell carcinoma was 32 cases, large cell carcinoma 5 cases, small cell carcinoma 4cases, lymphoma 3 cases, and bronchioalveolar carcinoma 2 cases. Among the other cases, pulmonary tuberculosis was. 11 cases and lung abcess 3 cases. Among the 49 cases proven malignant after operation or follow-up by now, 46 cases were malignant at fine- needle aspiration biopsy cytology (sensitivity 93.9%), and among the 23 cases proven benign after follow up, all showed no malignancy by fine-needle aspiration biopsy cytology (specificity 100%). Three cases failed in the follow-up due to various causes. In the benign cases, there were some who had difficulty in being diagnosed with this procedure alone, but we were helped a great deal in differentiating malignancies by this procedure. Complications were minimal, but 5 cases of pneumoth-orax occurred, and 2 cases among these needed closed thoracotomy and soon improved. In conclusion, transthoracic fine-needle aspiration biopsy cytology is very helpful in diagnosing patients with lung nodules or masses that failed to be confirmed with sputum examination or bronchoscopic procedure and in differentiating a malignant state from a benign one, with minimal complications. So, active clinical trial of this procedure is recommended.
김무성,엄경숙,박용주,김용,김성일,조훈영,민석기,Kim, Moo-Sung,Eom, Kyung-Sook,Park, Young-Joo,Kim, Yong,Kim, Seong-Il,Cho, Hoon-Young,Min, Suk-Ki 한국재료학회 1993 한국재료학회지 Vol.3 No.6
Bulk반절연 기판 웨이퍼에 이온 주입법에 의한 기존의 GaAs집적회로 제작시 발생하는 문제점을 보완하고자 반절연 기판 위에 반절연성의 고저항 GaAs 에피층을 성장하는 연구를 수행하였다. 먼저 반절연 기판의 EPD분포를 조사하고, MOCVD와 MBE법을 이용하여 undeped GaAs반절연성 에피층을 성장시켜 실제 집적회로의 제작에 적합한지를 평가하였다. 평가방법은 반절연성 에피\ulcorner을 buffer층으로 성장시킨 에피 기판에 ungated FET를 제작하여, 이 반절연성 에피\ulcorner을 통한 누설전류를 측정하고, 또한 반절연 기판의 EP분호의 영향을 조사하였다. 누설 전류의 측정결과 비교적 주설 전류가 큰 1$\mu\textrm{m}$ 두께의 MOCVD시료에서도 270nA/mm로 FET의 pinch-off에는 영향을 주지 못하는 매우 작은 누설 전류 값을 나타내었다. 또한 누설전류의 분포가 반절연 기판의 EPD분포와 일치하는 것을 발견하여, 에피층의 quality에 기판의 결함이 미치는 영향을 확인하였다. MBE법으로 성장한 2$\mu\textrm{m}$ 두께의 undoped burrer층 시료는 휠씬 좋은 특성을 나타내었으며, 매우 균일하고 낮은 누설전류(40nA/mm)가 측정되었다. The growth of semi-insulating(SI) high resistant undoped GaAs epilayer has been studied to solve the problems ocurring when GaAs IC is fabricated by the widely used ion implantation directly into the SI GaAs substrate. The EPD ditribution of the SI substrates has been examined, and the suitability of the buffer layers grown by MOCVD and MBE, respectively, has been tested for IC fabrication through leakage current measurement. IJngated FET has been fabricated on the SI epilayer and leakage current through the buffer layer has been measured. In the case of MOCVD grown 1$\mu\textrm{m}$-thick buffer layer, the leakage current is as small as about 270nA/mm, and this value does not affect the pinch-off of FET. In this case, the epilayer quality is affected by the substrate defects because the leakage current distribution is coincided with the EPD distribution of the SI substrate. The 2$\mu\textrm{m}$-thick buffer layer grown by MBE, however, has the better quality, and shows the lower leakage current(40nA/mrn) and higher uniformity.
X-Ray Triple Crystal Diffraction Spectrometer의 제작과 그 응용
박영한,염효영,윤형근,민석기,박용주,Park Young-Han,Yeom Byo-Young,Yoon Hyng-Guen,Min Suk-ki,Park Young Joo 한국결정학회 1997 韓國結晶學會誌 Vol.8 No.1
고분해도의 X-선 산란을 위해 두 실험 방법이 개발됐다. 그 방법들은 (1) 2-결정 회절 스펙트로메터 (DCD)설치와 (2) 3-결정 회절 스펙트로메터 (TCD) 설치였다. Si(511)-시료(hkl)의 DCD배열로 Si(333), Si(004), GaAs(004)의 rocking curve를 그렸다. 또한 단일체 단색 평행기와 $K_{\alpha1}$ 선택기를 포함하는 Si(111)-Si(111)-Si(511)-sample(hkl)의 TCD배열로 Si(333), Si(004) 그리고 GaAs(004)의 rocking curve를 그렸다. DCD와 TCD에 의한 rocking curve의 FWHM의 차이가 논의됐다. DCD에 의한 $In_{0.037}Ga_{0.0963}As/GaAs$의 (004) 및 (115) 반사 토포그라프가 행해졌다. Two experimental methods have been developed for high resolution measurement of x-ray scattering. The methods used were (1) an x-ray double crystal diffraction (DCD) spectrometer set-up and (2) an x-ray triple crystal diffraction (TCD) spectrometer set-up. With the DCD arrangement of Si(511)-sample(hkl), rocking curves have been plotted for Si (333), Si(004) and GaAs(004). Also, with the TCD arrangement of Si(111)-Si(111)-Si(511)-sample(hkl) including monolithic monocro-collimator and $K_{\alpha1}$ selector, rocking curves have been plotted for Si(333), Si(004) and GaAs(004). The results of FWHM by DCD and TCD set-up have been compared each other and discussed. The reflection topographs (004) and (115) in an $In_{0.037}Ga_{0.0963}As/GaAs$ sample have been obtained by DCD set-up.
명정구 ( Jung Goo Myoung ),김용억 ( Young Uk Kim ),박용주 ( Yong Joo Park ),김병기 ( Pyeong Ki Kim ),김종만 ( Jong Man Kim ),허형택 ( Hyung Tak Huh ) 한국수산과학회 2004 한국수산과학회지 Vol.37 No.6
N/A On 11 June 1991, eggs from the brood stock of small yellow croaker (Larimichthys polyactis) were artificially fertilized using the standard dry method and were hatched. Each of the fertilized eggs (1.1-1.2 mm in diameter) had an oil globule and was transparent and buoyant. The fertilized eggs hatched in a range of water temperatures (17.5-20.3℃) 44 hrs after fertilization. The total lengths of the newly hatched larvae were 3.1-3.3 mm, and these hatchlings had 31 myotomes (10+21). Melanophores and yellow-brown chromatophores were concentrated on the head, at the ventral part of the yolk, and in the middle of the tail. Four days after hatching, the larvae completely absorbed the yolk and became flexions of 5.1-5.5 mm in total length. Fifteen days after hatching, one spine (the anterior tip of the maxillary) appeared in the upper jaw and three spines developed at the upper parts of the eyes and on the posterior part of the head. At this stage, the larvae were approximately 8.3 mm long. Thirty-nine days after hatching, juveniles (1.9-3.4 mm in total length) had a pointed tail fin. By 66 days after hatching, the juvenile fish (about 4.0-6.5 mm in total length) were similar to adult fish in body shape. The larvae of L. polyactis could be distinguished from those of L. croacea by two distinct characteristics: the large number of vertebrae (28-29), and a relatively small bony ridge on the occipital region of the head.