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      • 韓國의 分收林業發展에 關한 硏究

        林榮俊 尙志大學校 1985 論文集 Vol.6 No.-

        The main purpose of the study was to analyze the development process of profit-sharing forests and find out the causes of failure and success of management in order to make a suggestion in policy making for the profit-sharing forest management in the future. The study was carried out by reviewing literatures and references related to the profit-sharing forests and interviewing with private forest owners, members of village forest associations and foresters in city and county offices. The results obtained in the study could be summarized and concluded as follows: 1. First profit-sharing forests in Korea called "Bu-Bun-Lim" was originated in 1908 when the Old Forest Law was put into effect. The objective of the profit-sharing forest system was to induce the private funds into afforestation in national forests. But the profit-sharing program was unsuccessful because of the lack of understanding, interests and funds for the project. The significance of the early started profit-sharing forest system could be found in the fact that it was the first trial in the history of Korean forestry to induce private funds for afforestation on the national forests. 2. After the Japanese occupation of Korea in 1910, the profit-sharing forest system was abolished in accordance with the Forest Ordinance promulgated in 1911. In replacement of profit-sharing forest system, a leased-afforestation system on national forests was created. The superficial objective of the leased-afforestation system was to expedite afforestation in denuded forest lands with a promise to give the forest land free to the afforesters when the planting was successful. But the real purpose of the leased-afforestation system seemed to give large forest lands to the Japanese immigrants. 3. Some provincial governments initiated a profit-sharing forest project on dictrict public forests in 1929. The project was geared to provide the funds by the provincial governments and labor forces by the autonomous district bodies in afforestation works for the purpose of profit-sharing at the ratio of fifty-fifty. The project was short-lived for only five years and implementation of the project was not successful, but the project is regarded meaningful because it was the first profit-sharing forest project on public forests in Korea. 4. Whin the increasing of timber demand during the Sino-Japanese War, a large planting plan on national forests was planned. But it was difficult to attain the good results in implementation due to the stortage of funds and labor forces. Therefore, the profit-sharing forest system on national forests was once again put into practice in 1943 in the hope of pulling the private capital of industry sector and labor forces into afforestation, but a good result was hardly expected. 5. The profit-sharing forest regulation promulgated in 1943 hold good, through the period of Military Government of America right after World War Ⅱ, until the Forest Law became effective 1961. Few profit-sharing forest was established during that period because of economic unstability and social discrder. 6. The Temporary Measure Law for Forest Protection came into exist in 1951 in order to take urgent measures to protect forests that were being destroyed during the Korean War. The main contents of the Law was to mobilize the village people to the afforestation and protection of the forests around the villages by taking up the devices of profit-sharing forest system in private forests. A great deal of private forest lands were planted under the Law and the measures have been made to continue in the Forest Law of 1961. 7. Instead of abolishing the leased-afforestation system on national forests in 1970, a profit-sharing forest system was introduced in 1973. Therefore, the contract holders of the leased-afforestation system on national forests can switch over their contracts to that of profit-sharing forests in national forests. In addition, the Law also requires that the wood-using industries consuming more than 5,000 cubic meters per year establish a profit-sharing forests on national or public forests in case they do not have their own forests. As timber demand increases, the need of afforestation is becoming paramount, but a good implementation is hardly expected because of high rise of forest land cost. It became difficult to buy forest lands for afforestation. Therefore, it is necessary to make use of the profit-sharing forest system in order to eliminate the burden of funds for purchasing the lands. In order to expedite the development of forests including small scale private forests for augmentation of timber resources, there seems a need to make an amend on the profit-sharing forest system by taking measures of inducing private funds for afforestation by means of improvement of forest loan system, forest tax system and free contract system between forest owners and afforesters.

      • KCI등재
      • KCI등재

        티타늄 표면처리에 따른 조골세포의 반응

        임영준,이용근,임범순,김철위 大韓齒科器材學會 2004 대한치과재료학회지 Vol.31 No.1

        It is well known that surface modification of titanium for implant has been shown to improve the adhesion, migration and differentiation of adjacent cells and tissues. This study presented the results of an experimental study on the interaction between MC3T3-E1 (mouse calvarian osteoblast cell line) cells and cp-titanium treated by thermal oxidation at four different temperatures after TiO2 blasting and NaOH treatment, which could provide the benefits of surface roughening and favorable oxide layer formation. No heat treatment group was used as a control. Cell interactions were studied using the combination of phase contrast microscope and scanning electron microscope. Potential cytotoxicity was tested by MTT assay. The response of osteoblast cells was different according to the condition of surface modifications. Thermal oxidation at 600℃ showed the best early cell attachment and calcium nodule formation compared to other groups. Thermal oxidation at 800℃ showed the worst cell attachment and proliferation. In general, osteoblast cells were attached to accompanying the formation of cellular process, spreaded and differentiated on the specimen surfaces. Calcium nodules were formed on the surface after these cells were developed multiple cell layers. These early osetoblast/titanium interactions might play a critical role in the osteoinduction stage of osseointegration. There was no statistically significant difference in cytotoxicity among the heat treated surfaces from the MTT assay(p>0.05). The results of microstructure analysis of the characterized cp-titanium surface of this study will be published separately.

      • 2P-572 : 임피던스 스펙트로스코피(Impedeance spectroscopy)를 이용한 삼투압 스트레스 하에서의 E. Coli의 생리학적 변화에 대한 전기화학적 분석

        임영준,이상엽 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0

        세포를 이용한 다양한 연구가 증가함에 따라 환경변화에 따른 세포의 상태의 실시간 모니터링 및 분석연구도 필요하다. 예를 들어, 수용성 세포(competent cell)는 외부환경의 온도 변화를 통하여 세포 내부로 외부 DNA를 흡수하는 특징을 가지고 있지만 이를 전기화학적으로 분석한 연구는 미흡하다. 본 연구에서는 수용성 세포인 E. Coli 5α 세포를 이용하여 삼투압 스트레스(Osmotic stress)에서의 변화를 전기화학적으로 분석하였다. 간단한 실크스크린 프린팅 기법으로 인쇄된 전도성 전극을 이용하여 외부변화에 따른 세포의 반응을 임피던스 스펙트로스코피(Impedance spectroscopy)를 통해 모니터링하고 분석하였다. 전기회로 모델링을 통하여 온도에 따른 E. Coli 세포로 부터 이온 배출 변화량을 평가하였고, 이로부터 수용성 세포의 경우 정상 세포에 비해 약 6.5배 높은 물질 전달 계수를 가지는 것을 확인하였다. 본 연구는 간단히 인쇄된 전극을 이용하여 세포의 거동을 모니터링 하였다는 점에서 향후 다양한 세포의 물질전달 현상을 빠르고 정확하게 측정할 수 있는 바이오센서로의 응용이 가능할 것으로 기대된다.

      • 1P-587 : 양이온 교환 반응을 이용해 합성된 코어-셸 구조의 반도체성 나노입자 표면 분석

        임영준,이상엽 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1

        나노기술의 발달과 함께 산업에서의 다양한 나노입자의 응용을 위한 나노입자의 분석기술 개발이 중요해지고 있다. 본 연구에서는 AC 임피던스 스펙트로스코피와 원자 힘 현미경을 결합하여 나노 규모의 반도체성 나노입자 표면분석 연구를 진행하였다. 나노 입자의 표면분석을 위해 측정모델로서 양이온 교환 반응(cation exchange reaction)을 이용하여 셀레늄 표면에 서로 다른 셸(Ag<sub>2</sub>Se, CdSe, ZnSe)로 구성된 코어-셸 구조의 반도체성 나노입자를 제작하였으며, 각각의 나노입자로부터 측정된 전기 신호를 전기회로 모델링을 통하여 나노 규모에서의 반도체성 나노입자 표면의 전기화학적 현상을 분석하였다. 그 결과 셀레늄 입자 표면의 각각 다르게 구성된 반도체성 셸은 서로 다른 캐퍼시턴스와 기생 인덕턴스를 가짐이 확인되었으며, 이러한 나노 규모에서의 전기적 현상을 재료의 특성과 구조적인 관점에서 분석하였다. 이러한 분석을 통하여 임피던스 스펙트로스코피-원자 힘 현미경 복합 시스템을 이용하여 나노입자 표면의 전기화학적 분석이 가능함을 제시하였다.

      • 1P-524: Printed Interdigitated microelectrode(IDE)를 이용한 Osmotic shock에 의한 E. Coli. 세포의 생리학적 변화의 임피던스 신호 분석

        임영준,김민철,조정현,이상엽 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.1

        바이오센서는 적은 양의 시료를 통하여 쉽고 빠르게 측정할 수 있다는 장점이 있어 다양한 연구가 활발히 진행되고 있으며, 경제적으로 만들기 위해 잉크젯 프린팅 기술적용이 시도되고 있다. 본 연구에서는 잉크젯 프린팅기술로 인쇄된 Interdigitated microelectrode(IDE)를 이용하여 E.Coli. 세포의 osmotic shock에 의한 생리학적 변화를 임피던스 스펙트로스코피(Impedance spectroscopy)를 통한 신호 분석 연구를 진행하였다. 세포의 삼투압 유지를 위해 이온성 물질을 배출하는 특성을 이용하여 세포의 구조적 차이에 따른 세포의 분산용액의 임피던스 변화를 실시간으로 관찰함으로써 osmotic shock에 의한 현상을 전기화학적으로 분석하였다. 전기회로 모델링을 통하여 세포 분산용액의 전기적 특성변화를 분석하였으며, E. Coli. 세포의 종류에 따라 용액의 임피던스 변화를 통하여 그 차이를 확인할 수 있었으며, 10% 이상의 임피던스 변화의 차이가 나타남을 확인하였다. 본 연구를 통하여 세포의 구조적 특성에 의한 생리학적 변화를 이용하여 센서로 응용 가능성을 제시하였다.

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