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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.
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最小自乘法에 依한 굴참나무의 地方材積表 調製를 爲한 二變數材積式의 誘導
林榮俊 尙志大學校 1992 論文集 Vol.13 No.-
(1) The purpose of this study was to induce two-variables volume equation applicable in the preparation of the local volume table of Cork oak growing in the Forest Work Training Center Forests. (2) 15 trees of Cork oak in the sample plot(0.01 ha) were measured for this study. (3) The general formula applied in inducing the stem volume equation is as follows; V=aD??H?? where, V ; stem volume(㎥), D ; diameter at breast height(cm), H ; tree height(m), a, b, c ; constant (4) Two-variables volume equation induced to prepare the local volume table of Cork oak in the district of Kangwon Do is V=0.0000387D?????H?????.
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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.
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