ISO 9000 시리즈에 대한 우리 産業의 對應戰略

이인환 漢陽大學校 産業大學院 1994 국내석사

경쟁제한적 기업결합에 대한 시정조치에 관한 연구

이인환 서울대학교 대학원 2010 국내석사

Facile strategies to improve the economy of polymer synthesis and self-assembly

이인환 서울대학교 대학원 2016 국내박사

Preparation of polymers and their self-assembled nanostructures with high controllability, efficiency, and economy is central basis for the development of polymeric nanomaterials. To address this issue, following four chapters described facile strategies for the synthesis and self-assembly of polymers with economic consideration. Chapter 2 described the concept of step-economic in situ nanoparticlization of conjugated polymers (INCP) with addressing the effect of core forming block. Poly(para-phenylene) was used as first block, and highly insoluble polythiophene or poly(3-methylthiophene) was used as second block to induce in situ self-assembly. We found that solubility and packing mode of second block were important factors to determine nanostructures. Chapter 3 described step-economic in situ nanoparticlization of conjugated polymers with addressing the effect of shell forming block. Poly(3-alkylthiophene) was used as first block, and highly insoluble polythiophene was used as second block to induce in situ self-assembly. It was found that hydrodynamic volume of first block and well-defined polymer structure were important factors to modulate the shape of nanostructures. Chapter 4 presented the price-economic synthesis of the conjugated polymers using recyclable Pd-Fe3O4 heterodimer nanocrystal. AB-alternating copolymers were synthesized by Suzuki-Miyaura polycondensation with Pd-Fe3O4 nancrystals. Significantly, Pd-Fe3O4 bimetallic nanocrystals were easily recovered by magnet and recyclable with minimal Pd leaching. Chapter 5 reported the atom and step-economic synthesis of poly(N-sulfonylamidine)s using Cu-catalyzed multicomponent polymerization. Optimization of polymerization condition enabled the synthesis of poly(N-sulfonylamidine) with high molecular weight and yield. Furthermore, this polymerization expanded to the library synthesis of poly(N-sulfonylamidine). This research is significant because this polymerization overcome previous limitations such as low molecular weight, defect in polymer structure, and narrow substrate scope. In summary, this thesis described economic synthesis of polymers and self-assembled nanostructures via INCP, heterogeneous catalysis, and multi-component polymerization. We believe that these strategies will expand their scope and suggest a new platform for the preparation of useful nanomaterials.

Almost 2-regular quinary quadratic forms

이인환 서울대학교 대학원 2017 국내박사

A (positive definite integral) quadratic form is called almost n-regular if it globally represents all but finitely many quadratic forms of rank n that are locally represented up to isometry. In this thesis, we discuss the finiteness of primitive almost 2-regular quinary quadratic forms up to isometry. We prove that there are finitely many almost 2-regular quinary quadratic forms that represent all integers. We also prove that there are finitely many primitive almost 2-regular quinary quadratic forms having an odd core prime. We discuss the finiteness of primitive almost 2-regular quinary quadratic forms which have 2 as the only core prime.

高麗의 政房機構 硏究

이인환 成均館大學校 1986 국내석사

Taxonomic Study on the Poneromorph Subfamilies Group (Hymenoptera: Formicidae) in Korea : 한국산 침개미아과군 (벌목: 개미과)의 분류학적 연구

이인환 충북대학교 2008 국내박사

This study was performed to identify with available materials over 3,500 specimens, a total of 12 species in six genera of the poneromorph subfamilies group in Korea and to review taxonomically. All investigated specimens are classified into three subfamilies; Amblyoponinae, Ponerinae and Proceratinae. Among the six genera, four belong to the subfamily Ponerinae and the rest each belongs to the subfamily Amblyoponinae and Proceratinae. In this study, keys to the all known genera and species of the subfamilies in Korea are presented. A synonymic list, description of a worker and comments on each species are given with SEM photographs of worker caste. The list of the poneromorph subfamilies group of Korean fauna is as follows: Family Formicidae Subfamily Amblyoponinae Amblyopone silvestrii (Wheeler, 1928) 톱니침개미 Subfamily Ponerinae Cryptopone sauteri (Wheeler, 1906) 장님침개미 Hypoponera gleadowi (Forel, 1895) 나도황침개미 Hypoponera sauteri Onoyama, 1989 황침개미 Hypoponera nippona (Santschi, 1937) 긴수염황침개미 Pachycondyla chinensis (Emery, 1985) 왕침개미 Pachycondyla javana (Mayr, 1867) 일본침개미 Pachycondyla pilosior (Wheeler, 1928) 털보장님침개미 Ponera japonica (Wheeler, 1906) 침개미 Ponera scabra (Wheeler, 1928) 거치른침개미 Subfamily Proceratinae Proceratium itoi (Forel, 1918) 배굽은침개미 Proceratium watasei (Wheeler, 1906) 와타세침개미 In addition, I made a pictorial key of seven species belonging to the Ponerinae collected through the plant quarantine process during the period of 1996-2007 and also of 12 species belonging to the Ponerinae found in Korea

Dequalinium effects on the fibrillation/defibrillation of a-synuclein & their consequences on cytotoxicity

이인환 서울대학교 대학원 2009 국내석사

자기 구동형 동기 정류기를 이용한 비대칭 하프 브리지 컨버터에 관한 연구

이인환 부산대학교 대학원 2002 국내석사

Abstract 수록

흰쥐의 前腦虛血모델에 對한 釣鉤藤의 神經防禦效果

이인환 경희대학교 대학원 2000 국내박사

Uncariae Ramulus et Uncus(UR, 釣鉤藤) has sweet in flavour and slightly cold in property, acting on the liver and pericardium channels. This drug was described in a medical classic as having the ability to remove "heat", check hyperfunction of the liver and relieve dizziness, tremors, and convulsions, and subdue "endogenous wind". In traditional Korean medicine, this drug is used to treat childhood epilepsy(febrile convulsions) and administered as antispasmodic or sedative in adults. So this study was planned to check the neuroprotective effect of UR on the global ischemia induced by 4-vessel occlusion in Wister rats. and UR extract was lyophilized after extraction with 70% methanol. We induced 4-vessel occlusion for 10 minutes and reperfused again. The number of CA1 pyramidal neurons were counted after 7 days of reperfusion under the cresyl violet staining. The results obtained were as follows 1. In 4-VO ischemia, UR showed significantly neuroprotective effects(1,000 and 500 ㎎/㎏ of UR extracts, p<0.05) compared with control group. Each neuroprotective ratio was about 23.0%, 19.0% respectively. 2. In vitro, UR did not show significant result in LDH activity. But in MTT assay, UR(25 and 100 ㎍/㎖) had antioxidative effect induced by peroxide. 3. In immunohistochemistry, we studied that cpp32 which is one of caspase-3 proteinase and has trigger effects on neuronal cell death(apoptosis) was decreased in the intraperitoneal injection of UR extracts at 0 and 90 minutes after inducing cerebral ischemia. Consequently, Uncariae Ramulus et Uncus has neuroprotective effects on the global ischemia induced by 4-vessel occlusion in Wistar rats. So we expect that Uncariae Ramulus et Uncus can be used as a drug for neurodegenerative disease.

도시민의 도시농업 참여 만족도와 농촌체험관광 인식에 관한 연구

이인환 서울시립대학교 일반대학원 2012 국내석사

This study identified the urban agriculture and recognition on the farming village experience tourism by the citizens. The analysis frame was provided by finding the measurable factors on the recognition on the urban farming and farming village experience tourism through related studies. The recognition and satisfaction on the urban farming and the recognition on the farming village experience tourism were surveyed. And the difference in the recognition on the urban farming and the farming village experience tourism between the participating group and non-participating group into the urban farming was analyzed. The precedent studies related with urban farming showed that the urban farming becomes an opportunity for the citizens to recognize the importance of agriculture and expected the effects such as the trust to agricultural products, improvement of environment protection recognition depending on the ecological education effect, nurturing the human nature and the change of dietary life depending on the change on the food material recognition. The results of this study showed the following facts. First, it was confirmed that the citizens recognize the effects suggested by precedent studies related to urban farming positively in general. However, the percentages of position of worrying and non-worrying the problems of shortage of space for urban farming, reduction of urban green land, wasteness of winter time landscape, spoiling of urban landscape, environment contamination at the proximities and the negative influence on the farming village economy were almost same level. It means that the citizens do not recognize only positive effect of the urban farming. Second, most of citizens recognized the farming village experience tourism, but most of them are not experienced with farming village experience tourism. Citizens have positive image in general owing to the opportunities for experiencing the crops growing and harvesting in the farming village experience tourism, experiencing the traditional culture, differentiated natural environment, ecology·environment education and providing the warm-heartedness of the local residents. Especially, it is considered that citizens have a big expectation on the natural environment differentiated with the cities. With regards to the negative image on the farming village experience tourism, citizens recognized the insufficient facilities, fresh environment, shortage of eye catchings and fun, and necessity of much time and cost. Citizens believe the long distance, inconvenient transportation, unsatisfactory facilities, time and cost as obstacles in farming village experience tourism. On the contrary, most of them showed the positive thinking on the participation into long-term stay. Third, it was known that the participants into the urban farming satisfy generally on the location and size of kitchen garden, economical cost, solving the needs for farming activity and properness as agriculture·ecology education center. When the comparison between the groups depending on the Y/N for participating into urban farming was made, the non-participants worried about the negative recognition such as the shortage of kitchen garden space for urban farming, reduction of urban green land ratio, waste landscape in winter time, spoiling the urban landscape, environment contamination in the proximities and negative influence on the farming village economy. Fourth, when the comparison between the groups depending on the Y/N for participating into urban farming was made, it did not show the big difference in the understanding on the farming village experience tourism. The crosstabluation was made to know the difference in the participating willing into the farming village experience tourism between the participating and non-participating groups into the urban farming. It showed that the participants into the urban farming did not show relatively higher willing than the non-participants. The reasons of the participation and non-participation were analyzed to identify the reason for the above. It was indicated that the biggest purpose of participating into farming village experience tourism lies in the different natural environment with cities and the education effect for the children. On the other hand, most of the responses for non-participating into farming village experience tourism were the satisfaction to the urban farming and busiest daily life. It was identified from the above results that the experience on the urban farming did not make positive influence on the participating willing into the farming village experience tourism. It is believed from the fact that the urban farming activities solved the leisure needs of citizens through the experience, leisure time and education which had been provided from the farming village experience tourism. However, it was known that there is a possibility to be a potential demand of the citizens for the farming village experience tourism because both of the groups have evaluated the unique natural environment of the region and place for children education provided from farming village experience tourism highly. It was derived from the study results that citizens recognize the potential limit of the urban farming including the good effects of urban farming which had been emphasized in the precedent studies. And the part of the biggest meaning and obstacles for the citizens in farming village experience tourism were checked. It was revealed that Y/N for participating into the urban farming made negative influence on the participating willing. Consequently, it is expected that this study to be a basic data to make the urban farming for entire citizen satisfaction through improving the negative effects of the urban farming which were known in the previous studies and to study the method to activate the balanced development and exchange between city and farming village by link to the farming village experience tourism. 본 연구는 도시민이 가지고 있는 도시농업과 농촌체험관광에 대한 인식을 파악하고자 하였다. 관련연구를 통해 도시농업에 대한 인식 및 농촌체험관광에 관련된 인식에 대해 측정할 수 있는 요인들을 마련하여 분석의 틀을 마련하고, 도시농업에 대한 인식 및 만족도, 농촌체험관광에 대한 인식 등을 조사하였다. 그리고 도시농업 비 참여집단과 참여집단 간 도시농업과 농촌체험관광에 대한 인식차이를 분석하고자 하였다. 도시농업 관련 선행연구들은 도시농업을 통해 도시민들이 농업의 중요성을 인식하는 계기가 되며, 농산물에 대한 신뢰, 생태교육효과에 따른 환경보호 인식 향상, 인성함양, 식재료의 인식변화에 따른 식생활의 변화 등 효과에 대해 기대하고 있었다. 본 연구의 결과를 통해 첫째, 도시민들은 도시농업관련 선행연구들이 제시하고 있는 효과들에 대해 대체로 긍정적으로 인식하고 있음을 확인 할 수 있었다. 하지만 도시농업 공간의 부족, 도시녹지 감소, 겨울철 경관 삭막, 도시경관 훼손, 주변지역 환경오염, 농촌경제에 부정적 영향 등의 문제에 대해서 걱정하는 입장과 그렇지 않은 입장이 거의 비슷한 비율로 나타났는데, 이는 도시민들이 도시농업에 대한 긍정적 효과만 인식하고 있지 않다는 것을 나타내는 결과이다. 둘째, 대다수 도시민이 농촌체험관광에 대해서 인지하고 있었으나 농촌체험관광 경험은 대부분 가지고 있지 않은 것으로 나타났다. 이는 도시민이 가진 농촌체험관광에 대한 작물재배 및 수확의 체험, 전통문화 체험의 기회, 도시와 이색적인 자연환경 체험기회, 생태·환경 교육의 기회, 지역주민의 정겨움을 제공받는 기회 등으로 전반적으로 긍정적인 이미지를 가지고 있었는데, 특히 도시민은 도시와 다른 자연환경에 대한 기대감이 큰 것으로 판단된다. 농촌체험관광의 부정적 이미지에 대해 도시민들이 시설부족, 낯선 환경, 볼거리와 재미가 부족, 많은 시간과 비용이 필요하다는 인식을 가지고 있었으며, 도시민들은 먼 거리, 불편한 교통, 불만족스러운 시설, 시간과 비용 등을 농촌체험관광의 장애로 느끼고 있었다. 반면에 장기체류 참여에 대해서는 대부분 긍정적인 의사를 나타내고 있었다. 셋째, 도시농업 참여자들은 도시농업 활동에 대해 텃밭의 위치, 텃밭 면적, 경제적 비용, 농업활동 욕구해소, 농업·생태교육장으로서의 적합성 등에 전반적으로 만족하고 있는 것을 알 수 있었다. 도시농업 참여유무에 따른 집단 간 비교를 살펴본 결과 도시농업 체험여부에 따라 도시농업에 대한 텃밭 공간부족, 도시녹지율 감소, 겨울철 삭막한 경관, 도시경관 훼손, 주변지역 환경오염, 농촌경제에 부정적 영향 등 부정적 인식에서 비 참여자가해 우려하고 있었다. 넷째, 도시농업 참여유무에 따른 집단 간 비교해 본 결과 농촌체험관광에 대한 인식에서는 큰 차이를 보이고 있지 않았다. 도시농업 비 참여집단과 참여집단의 농촌체험관광 참여의사 차이를 알아보기 위해 교차분석을 실시한 결과, 도시농업 참여자들은 비 참여자들에 비해 상대적으로 농촌체험관광 참여의지가 높지 않았다. 이에 대한 원인을 파악하기 위해 참여 및 불참에 대한 이유를 분석하였는데, 농촌체험관광 참여이유를 농촌체험관광이 가지고 있는 도시와 이색적인 자연환경과 자녀교육효과를 가장 큰 목적으로 두고 있다고 나타났다. 반면에 농촌체험관광 불참이유에서 도시농업 만족해서 및 바쁜 일상활 때문이라는 도시농업 참여자의 응답이 대다수 인 것을 알 수 있었다. 이 같은 결과를 통해 도시농업 체험여부가 농촌체험관광 참여의지에 긍정적인 영향을 미치지 못하고 있는 것을 확인할 수 있었다. 이는 도시농업 활동이 농촌체험관광에서 제공하였던 체험, 여가, 교육 등을 통해 도시민의 여가욕구를 해소시키면서 발생된 결과라고 생각한다. 하지만 두 집단 모두 농촌체험관광이 가지고 있는 지역고유의 자연환경과 자녀교육 장소로서 높이 평가하고 있으므로, 향후 도시민들의 농촌체험관광 잠재수요가 될 수 있는 가능성이 있음을 알 수 있었다. 이상의 연구결과를 바탕으로 기존 도시농업 선행연구들에서 주장하고 있던 도시농업의 순기능을 비롯하여, 잠재되어 있던 도시농업의 한계점에 대해서 도시민들이 인식하고 있음을 도출할 수 있었다. 그리고 도시민들이 농촌체험관광에서 가장 크게 의미를 두고 있는 부분과 참여에 장애로 느끼고 있는 점도 확인할 수 있었으며, 도시농업 참여유무에 따라 참여의지에 부정적인 영향을 주고 있음을 밝혀냈다. 따라서 본 연구는 앞서 확인된 도시농업이 가지고 있는 부정적 효과들을 개선함으로써 도시민 전체가 만족할 수 있는 도시농업을 만들고, 더불어 농촌체험관광과 연계를 통해 도농균형발전 및 도농교류를 활성화 시키는 방안을 연구하는데 도움이 될 수 있는 기초적인 자료가 될 수 있길 기대한다.