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Kim, Yong‐,Jin,Yoo, Hyobin,Lee, Chul‐,Ho,Park, Jun Beom,Baek, Hyeonjun,Kim, Miyoung,Yi, Gyu‐,Chul WILEY‐VCH Verlag 2012 Advanced Materials Vol.24 No.41
<P>On page 5565, Gyu‐Chul Yi and co‐workers grow position‐ and morphology‐controlled ZnO nanowalls in prescribed positions on graphene layers. The nanowalls are grown to produce a variety of shapes from simple circles to text at the microscale. The selective growth of high quality ZnO nanowalls is investigated by electron microscopy and optical spectroscopy. The hybrid nanostructure can be exploited to fabricate various nanodevices including microarrays of nanotube LEDs. </P>
유규석,김철 호남대학교산업기술연구소 2011 산업기술연구논문집 Vol.17 No.-
최근 하천사업에는 자연친화적인 설계기법이 도입되고 있으며 호안공법도 과거 제방보호 기능만을 가진 단순한 호안에서 식생을 활용한 다양한 종류의 호안공법이 개발되어서 각종 하천공사에 도입되고 있다. 따라서 호안공법을 도입할 때 호안재료에 따른 유수의 흐름이 하천의 흐름에 미치는 영향을 파악하는 것은 하천설계에 있어 대단히 중요하다. 이에 본 연구에서는 각기 다른 호안재료별로 유속분포, 레이놀즈수, 마찰계수를 산정하여 흐름특성을 파악하고 호안에 대한 적용성 및 호안재료의 수리학적인 평가를 위한 자료 확보에 초점을 두어 수리실험을 수행하였다. 실험에 사용된 호안재료는 토양, 호안블록, 인공식생, 실제식생인 잔디와 갈풀을 이용하였으며, 실내 개수로 실험 장치를 이용하여 유량의 변화에 따라 실험을 실시하였다. 수리실험결과 무식생인 블록과 토양은 바닥으로부터 수면까지의 유속의 변화가 작은 동일한 양상을 보이는 반면, 식생은 바닥으로부터 식생높이까지의 식생영역부분과 식생상단으로부터 수면까지 유속의 분포가 다른 양상을 나타내었다. 식생이 있을 때 무식생 호안재료에 비해 하상으로부터 식생높이까지는 유속이 감소하였고, 식생 상단으로부터 수면까지는 무식생 호안재료에 비해 유속이 증가하는 양상을 나타내었다. 마찰계수 분석결과 토양과 블록은 비슷한 결과를 나타내었지만, 식생은 재료의 상단과 하단부에서 각기 다른 양상을 나타내었다. 다른 재료에 비해 식생의 상단에서는 마찰계수가 감소하였고, 하단부에서는 마찰계수가 증가하였다. 이로부터 식생영역 하단에서 유속의 감소로 인한 하상의 침식과 사면의 보호에 식생이 충분한 효과를 발휘할 수 있다는 사실을 증명하였다. The nature-friendly design techniques are recently being introduced in river projec-ts and various bank protection revetment techniques which are using the vegetation have also been developed and introduced. The simple bank revetment method which has the only bank protection function has been used in the past. But understanding the effect of water flow in the river is a crucial part in the river design. Therefore the tests have executed for the characteristics of flow by calculating velocity distribution, Reynolds number and friction factor against bank materials and gathered data for the applicability to the bank revetment and the hydraulic assessment of materials. The materials used for the experiment are bare soil, revetment blocks, artificial herbaceous plants, and real herbaceous plants such as lawn grass and Phalaris arundinacea and the vertical velocity distribution was measured by changing flow in the open channel experiment instrument inside. According to the results of the research, it is identified that bare soil and revetment blocks are showed a similar appearance with a little flow velocity changing but vegetation is showed different velocity distributions between surface and the top of vegetation, between the top and bottom of vegetation. In vegetation, it is shown that flow velocity is decreasing between riverbed and the top vegetation and is increasing between the top vegetation and surface against non-vegetation. By result of friction factor experiments, bare soil and revetment blocks appeared a similar outcome but vegetation have different figures at top and bottom of material. The friction factor is decreasing at the top of vegetation compared with the other materials and is increasing at the bottom of vegetation. it was proved that the vegetation is helpful to slope protection and riverbed erosion by decreasing of flow at bottom of vegetation area.
남일송,윤여일,김선규,김용현,이주영,목지오,윤석기,김철희,김영선,변동원,서교일,유명희 순천향의학연구소 2001 Journal of Soonchunhyang Medical Science Vol.7 No.2
Background: Most cases of Graves' disease have been treated by antithyroid drugs in Korea. The major drawbacks of antithyroid drugs are the relative high rate of relapse and the inconvinience of long term therapy. Measurement of TBII and TRH stimulation test have been considered as the most reliable tests predicting relapse, but the predictive power is not high enough to use in clinical situation. This study was performed to find good prognostic indicators in Graves' disease patients after the discontinuation of antithyroid drug therapy. Subjects and methods : We restrospectively evaluated 96 patients with Graves' disease who showed normal TRH test at the end of antithyroid drug therapy and were followed for more than one year. Serum T3, T4, T3/T4 ratio, TBII, Anti-TPO Ab and TGAb levels were measured at the time of diagnosis and at the end of therapy. Two to three months after withdrawal of antithyroid medication, serum TSH and free T3 responses to TRH were examined. These parameters were compared between the relapse group and the remission group. Results : Among the 96 patients, 22 patients(22.9%) relapsed(Group Ⅱ) and 74 patients(77.1%) remained in remmision(Group Ⅰ). No significant difference was observed between the relapse and the remission group in clinical parameters, serum T3, T4, TSH, T3/T4 ratio, TBⅡ and Anti-TPO Ab determined before and after treatment. Serum TSH and free T3 levels measured after TRH stimulation were also similar in both groups. Serum TGAb levels determined at the end of treatment were significantly higher in the remission group(p<0.05). Relapse following the discontinuation of therapy occured within 24 months in 72.7% of the relapsed cases. After 24 months, relapse rate was reduced significantly. Conclusion : These results suggest that high serum TGAb levels could be a favorable prognostic indicator for the long term remission of Graves' disease treated with antithyroid drugs, and may suggest that Hashimoto's thyroiditis is combined with Graves' disease in those patients.
企業 附設 硏究所 活動實態에 관한 硏究 : 釜山·慶南地域을 中心으로
河正鎭,黃圭完,申大赫,兪炳哲 동아대학교 공과대학 부설 한국자원개발연구소 1990 硏究報告 Vol.14 No.2
The research institute of an enterprise attaches have been enlarged in korea. This study grasps the status and the research activity in the research institute of an enterprise attached in the Pusan and Kyungnam. So, we find the important role in the research institute of a enterprise attached.
위하수증으로 위 부분절제술 후 발생한 조기 잔위암 1예
유병철,유재형,박중원,도재혁,김재규,박실무,김형준,유경금,허칠행,문철,장세경 대한소화기내시경학회 1997 Clinical Endoscopy Vol.17 No.2
Gastric stump cancer is defined as cancers that develop in the gastric remnant after the gastric resection of nonmalignant lesions or malignant lesions. The interval between gastrectomy and the detection of gastric stump cancer must be over 5 years in nonmaligant lesions and 10 years in malignant lesions. Symptoms of gastric stump cancer are not specific, so, diagnosis is often delayed. Early detection and curative operation is very important in gasric stump cancer and follow-up endoscopic examination is the most importaint diagnostic tool to detect gastric stump cancer. Recently we experienced a case of early gastric stump cancer. We report review of the literature to remind the important of gastric stump cancer and the important of follow-up endoscopic examination.