韓國政治權力構造論 序說 : 그 ‘旣存性’問題를 中心으로

李廷植 東國大學校 1967 論文集 Vol.3-4 No.-

Cyanex 301을 이용한 미량 Ni(Ⅱ)의 추출 및 정량에 관한 연구

김황식,이정길,정창웅 순천향대학교 기초과학연구소 2005 순천향자연과학연구 논문집 Vol.11 No.1

A selective and quantitatively atomic absorption spectromethc measurements have been developed for the determination of trace Ni(Ⅱ) with 0.3M thiocyanate and 0.1M Cyanex SOlUMIBK. Ni(Ⅱ)-thiocyanate complex was quantitatively extracted into Cyanex 301-MIBK solution. Beer's law obeys in the range of 16 ppm in organic solvent. Analysis of Ni(Ⅱ) in seawater was performed by the proposed method.

관개수질을 고려한 시비가 벼의 생산성과 농업환경에 미치는 영향

엄미정,박현철,김갑철,류정,최정식 한국환경농학회 2004 한국환경농학회지 Vol.23 No.1

관개수 수질을 고려한 감비가 벼의 생산성과 농업환경에 미치는 영향을 분석한 결과는 다음 과 같다. 시험에 사용된 관개수의 질소, 인, 칼륨의 평균함량은 각각 6.16, 0.26, 9.37 ㎎/L 이 었고, 유입된 영양염류가 논을 통과하면서 농도가 감소되어 유출수의 성분은 유입된 관개수 보다는 낮은 농도를 보였으며, 논 표면수와 침출수의 농도는 시비량과 시비시기에 따라 변 화하였다. 토양검정 50% 시비구에서는 질소의 공급량과 소비량간의 차이가 0.14㎏/ha으로 나타나 양분수지면에서 균형을 이룬 반면, 농가관행시비구에서는 그 차이가 95.3㎏/ha로 나 타났다. 농가관행시비구에 비해 토양검정시비구와 토양검정50% 시비구는 등숙률, 천립중, 도정특성, 등이 우수하여 완전미수량에서 큰 차이를 보이지 않았으며, 시비량이 적을수록 단 백질 함량이 또한 적어 기계적인 식미치가 높게 나타나 품질에서 우수하였다. 시비효율에서 는 토양검정50% 처리에서 시비된 성분이 수량에 기여하는 비율이 높아서 시비이용과 효율 면에서 우수한 결과를 보였다. 이상과 같이, 관개수에 포함된 영양물질을 작물의 생육에 이 용함으로서, 농업용수의 수자원 이용효율을 높이는 동시에, 비료 절감효과와 생산량 증대의 가능성을 검토할 수 있었다. Table 11.Physicochemical properities and paratability of milled rice in the different fertilization ▷표삽입◁ (원문을 참조하세요) This study was conducted to investigate the effect on agricultural environment and crop productivity by different amount of applied fertilizer in consideration of irrigation water quality. N, P and K contents of irrigation water used in this eqdment were 6.16, 0.26 and 9.37 ㎎/L, reqecthly. N, P and K Concentrations of runoff water were lower than those of inflow water during rice cultivation. N, P and K Concentrations of ponded and percolated water were changed according to the amount and time of applied fertilization. During rice cultivation in paddy soil, nitrogen balance was closed to 0 in STF 50% (50% level of sail testing fertilizaton), 0.14 ㎏/ha, but it was 95.3 ㎏/ha in CF (conventional fertilization) treatment in STF 50% and STF (sail testing fertilization) treatment, yield of perfect rice was not greatly different as compared with CF treatment, due to the superiority of ripening rate, 1,000 grains weight and milling characteristics. Mechanical paratability of rice was excellent in NF (non fertilization) treatment, STF 50% treatment showed higher in nutrient availabiilty and fertilizers use efficiency than other treatments.

음향방출과 미세역학적시험법을 이용한 단일섬유강화 에폭시 복합재료의 비파괴적 섬유파단 위치표정 및 계면물성 평가

박종민,공진우,김대식,윤동진 한국비파괴검사학회 2003 한국비파괴검사학회지 Vol.23 No.5

섬유파단은 복합재료의 기계적물성을 규명하는 가장 중요한 현상 중 하나이며, 섬유파단 위치는 기지재료의 물성과 섬유표면 처리에 따라 광학현미경에 의한 방법 뿐만 아니라 음향방출법을 이용하여 확인 및 상호비교 할 수 있다. 두 개의 음향방출 센서를 단일섬유강학 에폭시 복합재료 시편 표면에 부착 시켜 연속적인 섬유파단 신호를 변형률과 측정 시간에 따라 감지하였으며, 계면전단강도는 단일섬유강화 복합재료 시험에서 광학적 방법과 음향방출법을 이용하여 측정하였다. 탄소섬유의 파단 수는 섬유표면을 전기증착으로 처리한 경우가 많았으며, 광학적인 관찰 시에 좀 더 많게 나타났다. 하지만 음향방출법과 광학적 방법에 의한 섬유파단의 위치는 작은 오차범위 내에서 상호 잘 일치하는 결과를 얻을 수 있었다. 음향방출법에 의한 섬유파단 위치표정과 파형분석은 투명, 반투명 및 불투명한 복합재료의 계면물성을 비파괴적으로 측정하기 위한 유용한 방법으로 사료된다. Fiber fracture is one of the dominant failure phenomena affecting the total mechanical performance of the composites. fiber fracture locations were measured through the conventional optical microscope and the nondestructive acoustic emission (AE) technique and then were compared together as a function of the epoxy matrix modulus and the fiber surface treatment by the electrodeposition method (ED). Interfacial shear strength (IFSS) was measured using tensile fragmentation test in combination of AE method. ED treatment of the fiber surface enlarged the number of fiber fracture locations in comparison to the untreated case. The number of fiber fracture events measured by the AE method was less than optically obtained one. However, fiber fracture locations determined by AE detection corresponded with those by optical observation with small errors. The source location of fiber breaks by AE analysis could be a nondestructive, valuable method to measure interfacial shear strength (IFSS) of matrix in non-, semi- and/or transparent polymer composites

다목적 쌍발 헬리콥터 엔진의 기본설계 및 성능해석

서정원,윤건식 國立 昌原大學校 産業技術硏究所 1999 産技硏論文集 Vol.13 No.-

In this study, the procedures for the preliminary design of the turbo-shaft engine for the light multi-purpose helicopter are established and the engine specifications are determined through the on-design and off-design performance analysis. And the effect of humidity on the engine performance is examined by considering the change of the gas properties and characteristic maps due to moisture contents. The calculation results show that the engine power are reduced by the existence of moisture in working fluid.

특수교육 초이론과 학교교육재구조화 연구의 필요성 고찰

김정권,민천식 한국정신지체아교육학회 2000 지적장애연구 Vol.2 No.-

특수교육은 이제 일반교육과 통합되어 가고 있으며, 특수교육 이론은 모든 교육의 지배 이론이 되어야 한다. 특수교육의 세계화는 시대적 지배 패러다임에 의한 특수교육 이론과 기본 가정에 대해 세계 각국이 어떻게 대응해 가고 있는가를 연구하는 것으로서 한국의 정체성을 찾는 계기가 된다. 세계는 국가의 명운을 걸고 교육을 개혁하고 있다. 21세기 국가 생존력이 국민의 역량에 있기 때문이며 더 나아가 자기주도적, 창의적, 협력적 인간을 양성함으로 국가 번영의 기틀을 만들 수 있다고 믿기 때문이다. The conclusion which are drawn from the discussion reviewed are as follows. We can begin to assess the significance of reconstructionist debate for contemporary society by comparing the emerging historical conditions of the 21st century to those of the early 20th century. In the late 20th century we have a better understanding of the implications of the new physics, particularly for the social disciplines, which, on the basis of these implication, are beginning to question some of their earlier objectivist claim about epistemology, methodology, and social life. This has produced new and reappropriated old methodologies for addressing fundamental conflicts on moral questions, particularly questions about the relations of power and knowledge in the emerging postmodern world. Finally, the most important in term of determinate possibilities for the future, industrialism has stalled out in the late 20th century and is being overtaken by postindustrialism. The significance of the emergence of postindustrialism is that it is premised on an even greater and more pervasive form of interdependence and social responsibility than industrialism. Thus, given the relevancies of the postindustrial era, the successful school in the 21st century will be one that produces liberally educated young people who can work responsibly and interdependently under conditions of uncertainty. So I think that it is necessity to study on special education metatheory and schooling restructuring.

벼 생육 및 수집에 대한 대체농자재의 영향

문영훈,최정식,엄미정,한성수 한국환경농학회 2003 한국환경농학회지 Vol.22 No.4

본 시험은 환경농업기술을 직접 농가에 파급시킬 목적으로 3년간('96~'98)수행하였던 연구결과를 토대로 1999년에 환경농업 시범마을인 남원시 대강면 방산리의 일반농가포장에서 수행한 결과이다. 계분 발효퇴비와 깻묵을 시용한 환경농업과 절충형농업 시험구의 벼 생육은 화학비료를 시용한 일반관행농업 시험구에 비하여 저조하였으며, 왕우렁이(Ampullarius insularus)를 이용한 잡초방제 효과는 제초제 2회(초·중기)살포효과보다 우수하였다. 목초액의 병해충 방제효과는 저조하였고 또한 환경농업과 절충형농업 시험구의 정조수량은 일반관행농업 시험구에 비하여 3~5% 감소 되였다. 수질은 환경농업과 절충형농업 시험구가 일반관행농업 시험구에 비하여 COD, NO₃-N, SO₄^(2-), Cl^(-)이 낮았으며, 물벼룩의 밀도는 높았다. The aim of this study was to apply the new agricultural technique developed for three years(96-98) by demonstration at an model farm of environmental agriculture located in Bangsan-ri, Dagang-myun, Namwon-city. Rice growth of environmental farming plot, which supplied with oil cake and compost fermented with chicken manure was reduced compared to that of conventional farming plot, which supplied with chemical fertilizers. Weed control by using of Ampullarius insularus in the rice paddy field was effective compared to that of control, which treated with chemical herbicide twice. The yield of rice was decreased of 3-5% in both environmental and eclectic farming good compared to that of conventional farming plot. The water quality of environmental not and eclectic farming plot were good compared to conventional farming plot. Density of water flea was high in environmental and eclectic farming plot compared to that of the conventional farming plot.

밤가공공장의 밤껍질에서 밤분말의 생산에 관한 연구(Ⅰ) : 밤껍질에서 분리한 전분의 이화학적 특성연구 Study on Physicochemical Properties of Starch Separated from Chestunt Inner Shell

전병관,문정식 동신대학교 환경연구소 1998 환경연구 Vol.3 No.1

밤 가공공장에서 밤을 가공하는 공정에서 다량의 밤껍질이 폐기되고 있으며 이껍질속에는 밤살이 포함되어 있다. 이렇게 폐기되는 밤살을 회수하여 식품원으로 활용한다면 재원의 재활용차원에서 뿐만 아니라 가공공장의 수익에도 많은 보탬이 될 것으로 생각되어 밤껍질의 활용에 대한 기초적인 연구로서 밤분말을 제조한 후 만든 밤전분의 이화학적 특성을 규명하여 다음과 같은 결과를 얻었다. 1. 무기성분 함량은 밤껍질에서 분리한 전분이 순수한 밤에서 분리한 전분보다 평균 4.5배정도 많았다. 2. 껍질에서 분리한 전분의 탄닌함량은 순수한 밤에서 분리한 전분의 탄닌에 비하여 12배정도 많았다. 3. 물결합능력은 껍질에서 분리한 전분이 순수한 밤에서 분리한 전분보다 40%정도 높았다. 5. 순수한 밤에서 분리한 전분과 껍질에서 분리한 전분의 요오드반응결과 625nm에서의 흡광도는 유사하였다. 6. amylose 분해한도는 밤껍질에서 분리한 전분이 순수한 밤에서 분리한 전분보다 8.0%정도 높았다. Chestnut processing plants have produced large amount of chestnut inner skin waste, which contains chestnut flesh that can be recovered to be used as food ingredient. To obtain basic information needed for commercial application, comparative chemical analysis of starches extracted from both inner skin waste and chestnut core was performed. The results were as fellows: 1. Starch from the inner skin waste contains 4.5 times more inorganic compounds than the core starch. 2. Starch from the inner skin waste contains 12 times more tannin (or tannic acids) than the core starch. 3. Starch from the inner skin waste absorbs 40% more water than the core starch. 4. Both types of starches recorded comparable absorbencies at 625nm from Iodine Reaction. 5. Starch from the inner skin waste shows 8% higher amylase degradation than the core starch.

흰쥐의 요도 손상후 협착 형성에 있어서 TGF-β_1의 역할

서일영,임정식 圓光大學校 醫科學硏究所 1995 圓光醫科學 Vol.11 No.2

Transforming growth factor-β_1 (TGF-β_1)is a homodimeric peptide of 25kDa involved in many fundamental biological processes including cell growth, extracellular matrix deposition and degradation, and inflammatory responses. Especially TGF-β_1 is released by platelet and inflammatory cells, and it affects all phases of the wound healing after injury. It contributes to the regulation of fibroblast chemotaxis and proliferation, and also controls the synthesis and degradation of extracellular matrix necessary for tissue repair. Clinically, scar tissue formation and subsequent stricture after urethral injury often result in troublesome problems to urologists. We intended to know the involvement of TGF-β_1 in the formation of stricture and histological changes after urethral injury of rats. We injured urethrae of 24 adult male Sprauge-Dawley rats(200-250g) by urethrotome and Dormia basket, and then observed histological changes and analysed TGF-β_1 mRNA levels by Northern blot. Northern blot analysis showed that TGF-β_1 mRNA was expressed for 1,3,and 5 days after injury. Fibroblasts and deposition of extracellular matrix were markedly increased on day 5. Reepithelialization was completed and urethral lumen was narrowed on day 10. Our results indicate that TGF-β_1 is involved in the formation of stricture after urethral injury and plays a critical role in early phase of tissue repair and fibrosis.

도로공사 우수배제시설의 시공성 및 성능 개선에 관한 연구

강인석,박서영,곽중민,이우식,정수언 경상대학교 생산기술연구소 2001 工學硏究院論文集 Vol.1 No.-

Generally, a street-inlet in road facility is aimed to exclude rainfall and filth from sewer system. In order to solve some problems in current street inlet facilities, some revised inlet systems have been suggested. Those revised facilities can also solve an environmental problem like a bad smell emitting from the worn facility and solve civil petitions due to its safety and poor quality of passing rainfall. In this study, the existing rainfall exclusion facility was investigated including foreign countries and a developed street inlet model was represented through estimating of their structures, characteristics and costs. It also be analyzed that the existing problems can be solved by a trial construction and the developed model was compared with existing models by focusing on constructability and maintenance capacity.