재생굵은골재를 사용한 콘크리트의 동결융해 특성

성찬용,윤준노,김영익,임상혁,정덕현 충남대학교 농업과학연구소 2003 농업과학연구 Vol.30 No.2

이 연구는 플라이 애시를 결합재 중량의 20%, 재생굵은골재를 천연쇄석굵은 골재의 0%, 25%, 50%, 75%, 100%를 치환하여 압축강도와 동결융해 특성을 구명하였으며, 이 연구를 통해 얻어진 결과를 요약하면 다음과 같다. 1. 재령 28일의 압축강도는 모든 배합비와 W/B 35%에서 400㎏f/㎠이상으로 나타나 고강도콘크리트에 이용될 수 있을 것으로 생각된다. 2. 중량감소율은 동결융해 300사이클에서 1%미만으로 나타났고, 표면박리와 같은 현상은 나타나지 않았으며, 재생골재의 대체율이 증가할수록 감소율은 증가하였다. 3. 초음파진동속도는 동결융해 300사이클에서 19~24%정도의 감소율을 나타내었으며, 재생골재의 대체율이 증가할수록 감소율은 증가하는 경향을 나타내었다. 4. 상대동탄성계슈는 재생골재의 대체율에 따라 60~72%의 범위로 나타내었으며, 재생골재 대체율이 증가할수록 감소하는 경향을 나타내었다. 5. 내구성지수는 모든 배합에서 60이상을 나타내었으나, 재생골재 대체율이 100%일때는 급격히 떨어지는 경향을 나타내었다. 6. 재생굵은골재를 사용한 콘크리트의 압축강도, 중량감소율, 초음파진동속도, 상대동탄성계수, 내구성지수 시험결과를 볼 때, 시험에 사용한 재생굵은 골재는 고강도콘크리트에 사용이 가능할 것으로 판단된다. This study was performed to examine the freezing and thawing properties of the high strength concrete using recycled coarse aggregate. The recycled coarse aggregate was replaced by 0%, 25%, 50%, 75% and 100% of natural crushed aggregate. The compressive strength of the concrete used recycled coarse aggregate was shown in more than 400kgf/㎤ at the curing age 28 days. The weight loss ratio by freezing and thawing was shown in less than 1% at all mix type. The pulse velocity and relative dynamic modulus were decreased with increasing the freezing and thawing cycles. Also, durability factor for the freezing and thawing were decreased with increasing the content of recycled coarse aggregate. But, recycled concrete replaced with recycled coarse aggregate 100% was shown in more than 60 by durability factor in freezing and thawing of 300cycles Accordingly, these recycled coarse aggregate can be used for high strength concrete.

만성 요통이 여성의 골밀도와체간근력에 미치는 영향

박준용,하상배 大韓再活醫學會 2000 Annals of Rehabilitation Medicine Vol.24 No.5

레이저 계측에 의한 맞대기 용접부의 스트레인 측정

성백섭,차용훈,박창언,김일수,김덕중,이연신,손준식 한국공작기계학회 2001 한국공작기계학회 춘계학술대회논문집 Vol.2001 No.-

Currently knowledge of strain in welds has mainly been obtained from strain gaging method; that is directly attaching most of the material to the gage. The very few non-contact method are still in the early stage. One of the non-contact methods is by the use of the laser that has high-level of the accuracy for the measurement, and this laser also has excellent characteristics on which many studies for its applications are focused throughout the many fields. The dissertation is on the measurement of the strain caused by the characteristics and the temperature changes of the TIG welded zone which is used with 3D ESPI system that is functionally modified through the laser ESPI system. This system employed the aluminum sheet-metal which are mainly used for the steel plate such as for the electronics, chemistry, food instrument and electronic appliances.

[논문]습지 분포 수치지도 제작에 따른 GIS 모델링

박상용,곽영주,강인준 釜山大學校生産技術硏究所 2004 生産技術硏究所論文集 Vol.63 No.-

습지는 한번 훼손되면 재생 불가능하고 그 대체물을 만들 수 없으므로 습지보전과 대책마련이 증요하다. 최근, 환경단체에서 자연습지 뿐만 아니라 산지습지에 대한 지속적인 생태적 조사와 발견이 중요하다는 인식이 높아지고 있다. 본 연구에서는 산지습원에 대한 기준점 측량방식으로 Total-Station과 GPS (Global Positioning System) 측량장비를 이용하여 정확한 위치를 규정하였고 지리정보(GIS) 기술을 활용하여 체계적으로 자료를 관리할 수 있는 표준화된 습지분포 수치지도를 제작하였다. 또한,복잡한 지도l 설계도면과 종합적 자료관리와 의사결 정 과정을 지원하기 위한 자료를 수치화 하였다.

다발성 뇌수막종

박상준,박세혁,신동익,오세문 대한신경외과학회 1998 Journal of Korean neurosurgical society Vol.27 No.12

우리나라 山林法에 있어 持續可能한 山林經營의 實現을 위한 法的 構造에 관한 硏究 : Whit a focus on the legal framework of Montreal Process Criterion 7

성준경,윤화영 동국대학교 대학원 2001 東院論集 Vol.14 No.-

Since the Statement of Forest Principles and Agenda 21 in 1992, sustainable forest management(SFM) has become a main subject for forest management in the world. For achievement of SFM, criterion and indicator(C&I) are essential factors. The Montreal Process was formed in Geneva, Switzerland, in June 1994 to develop and implement internationally agreed criteria and indicators for the conservation and sustainable management of temperate and boreal forests. At the 6th meeting of the Montreal Process Working Group in Santiago, Chile, in 1995. And then, the 10 member countries endorsed a statement of political commitment known as the "Santiago Declaration" which included a comprehensive framework of 7 criteria and 67 indicators. Among the these C&I, the criterion 7 is an effective legal and institutional framework. The first indicators of criterion 7 is the legal framework(laws, regulations, guidelines), including the 5 assessment extent, to support sustainable forest management. A purpose of this study is the assessment of criterion 7, especially the legal framework, for SFM in the Korean Forest Law. As a results of this study, the korean forest law is relatively well organized for SFM. But the indicator 7.1.b which is the legal framework to provide opportunities for public participation in public policy and decision-making related to forests and public access to information will have to develop and improve for SFM.

완전 기저 동맥 중복과 동반된 모야모야병(Moyamoya disease) 1예

권준범,양현덕,한범기,이지용,문준식,이성수 대한신경과학회 1999 대한신경과학회지 Vol.17 No.2

담배의 잎조직 배양에 있어서 기관형성과 동위효소 유형에 미치는 생장조절제의 영향

成淳基,金濬喆,成敏雄 慶尙大學校 1986 論文集 Vol.25 No.2

담배(N. tabacum cv. NC 2326) 잎조직 배양에서 기관형성에 가장 효과적인 생장조절제의 배지조성을 찾기위하여 NAA와 kinetin의 농도별 혼합처리 5종류 및 picloram과 BAP의 농도별 혼합처리 5종류의 배지에서 26℃ 조건으로 35일간 잎조직을 배양시켜 각 처리구에 대한 기관형성률을 조사하고, 6종류의 효소에 대한 동위효소 유형 및 단백질 함량은 기관형성이 가장 잘된 0.01㎎/l pocloram+0.6㎎/lBAP 처리구와 0.5㎎/l NAA+0.5㎎/l kinetin 처리구의 두 처리구의 배양체를 대상으로 조사한 결과는 다음과 같다. 1. NAA와 kinetin을 혼합처리한 5종류의 배지중 0.5㎎/l+0.5㎎/l kinetin 처리구에서 shoot와 뿌리가 각각 100% 및 50%로서 가장 높은 기관형성률을 나타냈다. picloram과 BAP 혼합처리구에서 callus형성률은 평균 6%로 callus 형성에는 효과적인 배지는 아니었으나 기관형성률은 높게 나타났다. 그 중 0.01㎎/l pocloram+0.5㎎/lBAP 처리구에서 shoot와 뿌리가 각각 100% 및 90%의 형성률을 나타내어 기관형성에 가장 효과적이었다. multiple shoot 형성에는 picloram과 BAP 혼합배지가 NAA와 kinetin 혼합배지보다 더욱 효과적임을 알 수 있었다. 2. 배양제의 단백질 함량은 기관형성 과정에서 배양이 진행됨에 따라 두 처리구에서 모두 감소하였으나 picloram과 BAP 혼합처리구는 NAA와 kinetin 혼합처리구보다 낮았다. peroxidase의 활성은 이와 반대로 picloram과 BAP 혼합처리구에서 약 8배 높게 나타났다. 3. peroxidase와 malate dehydrogenase 동위효소들의 활성은 shoot가 형성됨에 따라 두 처리구 모두 증가하였으나, lactate dehydrogenase 동위효소들은 두 처리구 모두 감소하였다. 이러한 경향은 두 처리구 중에서 picloram과 BAP 혼합처리구에서 더욱 뚜렷하였다. 그러나 esterase, acid phosphatase, aspartate aminotransferase 동위효소들의 활성은 shoot 형성중에 두 처리구 모두 뚜렷한 변화가 없었다. 4. 6종류의 효소에서 분리된 동위효소의 수는 두 처리구를 합쳐 peroxidase에서 12개, acid phosphatase에서 6개, aspartate aminotransferase에서 9∼13개, lactate dehydrogenase에서 3∼5개, esterase에서 10∼16개가 각각 확인되었다. Tabaco (Nicotiana tabacum cv. NC 2326) leaf tissues were cultured on Murashige and Skoog medium containing various concentrations and combinations of some growth regulators at 26℃ for 35 days. The obtained results were summarized as follow; 1. Organ formation was 100% in shoot and 50% in root on the medium containing 0.5㎎/l NAA and 0.5㎎/l kinetin. On the medium containing 0.01㎎/l picloram and 0.5㎎/l BAP, organ formation displayed 100% multiple shoot formation and 90% root formation without callus formations. Multiple shoot formations were enhanced more by picloram and BAP groups than by NAA and kinetin groups. 2. During the shoot formation, protein content in the cultures on the medium containing picloram and BAP was lower than NAA and kinetin groups, but peroxidase activity in the former medium was higher about eight times than that in the latter medium. 3. The activity of anodic peroxidase and malate dehydrogenase isozyme increased during the shoot formation, whereas that of lactate dehydrogenase isozyme decreased. However the activity of esterase, acid phosphatase, and aspartate aminotransferase did not change. 4. All the isozymes were separated with 12 bands in peroxidase, 6 in acid phosphatase, 9∼13 in malate dehydrogenase, 3∼5 in lactate dehydrogenase, 10∼16 in esterase, 6 in aspartate aminotransferase during the shoot formation.

당뇨망막증 환자에서 건강보조제 복용 후 양안 동시에 발생한 망막출혈 1례

이상준,이정주,김수영,김신동 고신대학교의과대학 2008 고신대학교 의과대학 학술지 Vol.23 No.2

Purpose : This is a report of retinal hemorrhage in a patient suffering from diabetic retinopathy taking 10 days of protein supplements. Method : A 38-year-old female patient who had received a panretinal photocoagulation started taking supplements made of cocoon(cocoon steamed powder, ginseng powder, pepino abstraction powder et al.) for 10 days. Then, the patient went on to suffer from an uncontrollable blood pressure, a general edema and a loss in visual acuity. The patient's vision was counter finger 50cm in both eyes. The fundoscopy revealed vitreous hemorrhage in the right eye and preretinal hemorrhage in the left eye. She was hospitalized in nephrology, We waited to resolve hemorrhages. But hemorrhages was not improvement, we performed a pars plana vitrectomy and laser photocoagulation. Results : After the operation, the corrected vision was 0.8 in the right and 0.63 in the left eye, respectively. The patient's general condition was improved with diuretics. Discussion : The main ingredient of the supplements that the patient took were peptides. So this patient with diabetic renal failure had to reduce renal function which cause a reduction in glomerular filtration rate, a increase in blood creatinine levels, edema due to increased blood pressure and vitreal hemorrhaging in both eyes. In conclusion, one must be careful of health supplements because we cannot be sure of the ingredients and the side effects which could worsen certain illnesses.

여성에서 체간 근력이 골밀도에 미치는 영향

박준용,하상배 大韓再活醫學會 1998 Annals of Rehabilitation Medicine Vol.22 No.6