http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
VP-16으로 성공적으로 치료된 위 Kaposi 육종 1예
양웅석,송근암,조몽,이재승,송철수,김형욱,김영민,이수봉,김태오,이성훈 대한소화기내시경학회 1999 Clinical Endoscopy Vol.19 No.4
The skin is an uncommon site of distant metastasis from any internal malignancy, and the incidence of metastatic skin lesions as the first symptom of disease is only 0.8% in patients with all systemic malignancies. Furthermore, cutaneous metastasis from adenocarcinoma of the stomach has been found to be extremely rare. A 35-year-old female patient was admitted due to multiple cutaneous nodules in her chest, abdomen, and back. A gastroendoscopic examination and biopsy was made according to the results of skin pathologic findings. Stomach and skin biopsy results revealed a signet ring cell type of adenocarcinoma. A case of gastric adenocarcinoma in which metastatic skin nodules appeared as the first sign of disease, is here in reported with a review of related literature.
정영화,최성용,윤경구,용석응,김태경 강원대학교 석재복합신소재제품연구센터 1998 석재연 논문집 Vol.3 No.-
한국 대부분의 고속도로는 콘크리트로 포장되고 있으며, 플라이애쉬를 포장용 콘크리트에서 재활용하면 콘크리트의 성능을 향상시킴과 동시에 경제적 이익과 환경보호에 큰 기여를 할 것이다. 본 연구에서는 플라이애쉬를 포장 콘크리트에 재활용하고자, 플라이애쉬 치환율, 물-시멘트비, 굵은골재 최대치수를 주요실험 변수로 하여 이들이 플라이애쉬를 혼입한 포장용 콘크리트의 역학적 특성에 미치는 영향을 살피기 위해서 실험하여 통계처리 분석하였다. 이러한 분석결과를 바탕으로 포장 콘크리트의 적정배합을 제시하였으며 결과는 다음과 같다. 플라이애쉬를 혼입한 포장콘크리트의 휨강도에 영향을 미치는 인자는 플라이애쉬 치환율이 가장 큰 것으로 나타났으며, 다음으로 굵은골재 최대치수와 물-시멘트비 순으로 영향을 미친다. 또한, 플라이애쉬 치환율과 굵은골재 최대치수의 상관관계가 가장 큰 것을 알 수 있었다. 목표압축강도를 목표 휨강도의 6배로 선택하여 적정구간을 결정하였으나, 적정배합구간이 목표압축강도에 의해서 결정되었다. 이는 플라이애쉬의 작은 수화물이 공극을 효과적으로 채움으로써 휨강도의 증진에 크게 기여하기 때문으로 판단된다. 고속도로 포장에 적용할 수 있는 32mm의 굵은골재 최대치수와 45%의 물-시멘트비를 사용하는 목표 휨강도 45kg/㎠의 적정배합에서는 5.0%까지 플라이애쉬를 치환 가능하고, 50kg/㎠의 적정배합에서는 2.5%까지 치환 가능하다. 공항 포장에 적용할 수 있는 40mm의 굵은골재 최대치수와 37%의 물-시멘트비를 사용하는 목표 휨강도 45kg/㎠의 적정배합에서는 4.5%까지 플라이애쉬를 치환 가능하고, 50kg/㎠의 적정배합에서는 2.0%까지 치환 가능하다. The most of highway in Korea have been paved by concrete since last ten years. The recycling of fly ash in pavement concrete may result in economics, the improvement of concrete quality and the reservation of environment. This paper focused on the series of experiment and statistics analysis with experimental variables such as fly ash substitute ratio, water-cement ratio and maximum size of coarse aggregate in order to investigate the feasibility of recycling of fly ash in pavement concrete, to see the strength characteristics and t propose the optimum mix design based on previous results. The results of experiments and analysis were follows; The fly ash substitute ratio affected most seriously to the flexural strength of concrete among main variables, followed by maximum size of coarse aggregate and water-cement ratio. The interaction between fly ash substitute ratio and coarse aggregate size was the biggest. The optimum mix design was determined by target compressive, which was selected as 6 times of flexural strength. This indicated that the small hydrate of fly ash in concrete filled in effectively and resulted in the enhancement of flexural strength. the optimum mix design for highway pavement concrete with 32mm of maximum size of coarse aggregate and 45% of W/C can incorporate up to 5.0% and 2.5% of fly-ash at 45 kg/cm² and 50 kg/cm² of target flexural strength, respectively. The optimum mix design for airport pavement concrete with 40mm of maximum size of coarse aggregate and 37% of W/C can incorporate up to 4.5% and 2.0% of fly ash at 45 kg/cm² and 50 kg/cm² of target flexural strength, respectively.
김양욱(Yang-Wook Kim),차재웅(Jae-Ung Cha),김율성(Yul-Seong Kim) 한국항해항만학회 2020 한국항해항만학회지 Vol.44 No.6
우리나라는 항만의 기능 다각화 및 부가가치 창출을 목표로 국내 주요 무역항에 항만배후단지를 단계적으로 개발해왔다. 그러나 이러한 목표를 달성하기 위한 배후단지 입주업체 선정기준에 관한 연구는 아직 부족한 실정이다. 본 연구는 부산항 신항 배후단지를 대상으로 입주업체 특성별 생산성을 비교분석하여 입주업체 선정기준 마련에 기여하고자 하였다. 분석을 위해 67개 업체들의 최근 3년(2017-2019)간 운영실적 자료를 수집하여 단일요소생산성을 측정하였다. 그 결과, 물류업은 물동량, 제조업은 매출액 측면의 생산성에 강점이 있는 것으로 나타났다. 또한, 상대적으로 개장시기가 빨랐던 북컨테이너 배후단지가 웅동 배후단지에 비해 전반적인 생산성이 높았다. 마지막으로 외국인과 시설·설비 투자규모에 따른 생산성의 경우 전반적으로 투자규모가 평균 미만인 업체들이 평균 이상인 업체들보다 생산성이 높은 것으로 분석되어 부정적인 상관관계를 보였다. 따라서 항만배후단지의 생산성 및 경쟁력을 강화하기 위해서는 입주업체들의 고용 및 화물 창출 능력을 제고할 수 있는 제도적·법률적 보완과 신규 입주업체 선정기준의 재확립이 필요하다고 판단된다. Korea has gradually been developing port distriparks in major domestic trade ports to diversify their function and create added-value. New tenant companies are needed to help achieve these goals, but no research has been done on selection criteria. To provide such criteria, this study conducted a comparative analysis of the productivity of tenant companies in Busan New Port Distripark based on their characteristics. SFP (single-factor productivity) was measured using the operational data of 67 companies in the distripark over the past - three years (2017-2019). The results indicate that the logistics business and the manufacturing business have strengths in cargo volume productivity and in sales productivity respectively. Also, Northern distripark, a relatively older facility, was found to be more productive than Ung-dong distripark. Finally, the effect of investment—both foreign and in FAC/EQ (facility and equipment)—on productivity showed an inverse relationship with productivity, with the companies with under-average investments being more productive than those whose investments were above average. Therefore, to enhance the productivity and competitiveness of port distriparks, tenant companies must be subject to supplemented system and law for increasing employment and cargo volume, and reestablished selection criteria.
The Study on the Susceptibility of Line Pipe Steels to Sulfide Stress Corrosion Cracking
Koh, Seong-ung,Ro, Kwang Seop,Kim, Kyoo Young 한국부식방식학회 2002 Corrosion Science and Technology Vol.31 No.2
The effect of alloying elements in the line pipe steels on the SSCC susceptibiliQ was studied with respect to hydrogen permeation, crack nucleation, and crack propagation. The micro-alloying elements of Cu-Ni, Mo, and Ti were investigated. SSCC was evaluated using a Constant Elongation Rate Test (CERT) in a NACE TM-01-77 solution. Hydrogen permeation through steel matrix was measured by an electrochemical method. The corrosion current depending on the immersion time in the test solution was determined by linear polarization method as well. In addition to the basic alloying element, the addition of 0.13wt.% Cu and O.lwt.% Ni does not show any particular improvement in the electrochemical properties, whereas the addition of Ti reduces the hydrogen permeation by the formation of strong hydrogen trapping sites, Ti-Nb(C,N) precipitates. Addition of 0.13% Mo gives negative effects on two aspects; one is increase in hydrogen flux in steel by inducing pitting in the sulfide film formed on the steel surface and the other is relative easiness in crack propagation due to hard bainitic matrix. As a result, Steel D has the best resistance to SSCC, while Steel B has the highest susceptibility to SSCC.