• 한국실천공학교육학회논문지
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• 제4권2호
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• pp.150-157
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• 2012

본 연구에서는 공학분야별 연구환경 차이를 확인하고, 연구대상 학부 과별 연구역량을 비교하기 위해 한국연구재단 등재 후보지 발간 논문, SCI급 등재지 발간 논문, 대학정보공시센터의 연구실적 데이터 등 다양한 자료를 비교 분석하였다. 연구결과 학문분야별로 통계적으로 유의한 연구실적 차이를 도출하였으며, 이는 전국 4년제 대학 및 국립대학의 연구실적 데이터 분석을 통해 일관되게 나타남을 확인하였다. 따라서 대학별 교수업적 평가 시 연구실적 평가에서는 학문분야별 차별적 평가가 필요함을 확인할 수 있었다. 하지만 모든 평가에 있어 가장 중요한 점은 평가의 정확도가 아니라 관련 이해당사자들의 합의와 평가의 공정성에 있으며, 모든 대학 구성원들이 동의하고 수용할 수 있는 가장 공정한 평가방법을 찾기 위해 충분한 수준의 논의와 타협, 관련 정보의 공개에 시간과 노력이 투입되어야 할 것으로 판단된다.

• Radiation Oncology Journal
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• 제7권1호
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• pp.101-112
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• 1989

The treatment planning and dosimetry of small fields for stereotactic radiosurgery with 10 MV x-ray isocentrically mounted linear accelerator is presented. Special consideration in this study was given to the variation of absorbed dose with field size, the central axis percent depth doses and the combined moving beam dose distribution. The collimator scatter correction factors of small fields $(1\times1\~3\times3cm^2)$ were measured with ion chamber at a target chamber distance of 300cm where the projected fields were larger than the polystyrene buildup caps and it was calibrated with the tissue equivalent solid state detectors of small size (TLD, PLD, ESR and semiconductors). The central axis percent depth doses for $1\timesl\;and\;3\times3cm^2$ fields could be derived with the same acuracy by interpolating between measured values for larger fields and calculated zero area data, and it was also calibrated with semiconductor detectors. The agreement between experimental and calculated data was found to be under $2\%$ within the fields. The three dimensional dose planning of stereotactic focusing irradiation on small size tumor regions was performed with dose planning computer system (Therac 2300) and was verified with film dosimetry. The more the number of strips and the wider the angle of arc rotation, the larger were the dose delivered on tumor and the less the dose to surrounding the normal tissues. The circular cone, we designed, improves the alignment, minimizes the penumbra of the beam and formats ball shape of treatment area without stellate patterns. These dosimetric techniques can provide adequate physics background for stereotactic radiosurgery with small radiation fields and 10MV x-ray beam.

• 생태와환경
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• 제52권2호
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• pp.151-160
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• 2019

서식지 이질성은 복잡한 구조를 가진 서식지일수록 생물다양성이 증가된다는 개념으로 농업생태계에서도 적용이 가능하다. 특히 농업생태계에서 해충 조절과 같이 포식자로 기능하는 거미를 이용할 경우 농업생태계의 전반에 관한 이해의 폭을 넓힐 수 있다. 본 연구는 우리나라 농업생태계의 대표적인 재배 유형인 밭과 논에서 거미의 다양성이 공간 스케일에 따라 어떠한 특성을 나타내는지 확인하고자 수행하였다. 함정트랩을 설치하여 밭에서 24개 샘플을, 논에서 24개 샘플을 수집하였다. 공간 스케일에 따른 밭과 논의 종수는 누적 곡선과 추정 곡선을 통해 평가하였다. 전체 조사 지점들에서 종수는 밭에서 높게 나타났고 조사 지점별 평균 종수는 논에서 높게 나타났다. 이를 통해 작은 공간 스케일에서는 서식지 구조의 복잡성이, 큰 공간 스케일에서는 작물 종류의 다양성이 거미의 다양성에 영향을 미치는 것을 확인할 수 있었다.

• 한국건축시공학회지
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• 제7권2호통권24호
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• pp.107-112
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• 2007

Recently, a lot of domestic construction companies have implemented Knowledge Management System. However, most of the knowledge in the construction fields still cannot written down on papers, and it is just locked in people's heads. The purpose of this study was to analyze the current situation of knowledge sharing in the construction fields. For this research, questionnaires were distributed and the results of this study was as follows; the essential factor of successful knowledge sharing is not introducing a high quality of electronic system but developing culture of knowledge sharing. When positive culture of knowledge sharing is combined with technical infrastructure, knowledge sharing will be actively promoted.

• 동남아시아연구
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• 제24권1호
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• pp.89-132
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• 2014

This study examined Islamic economy of Malaysia. In this process, Islamic economy was classified two fields such as finance and consumption. In finance, this study focuses on development of Islamic banking, Islamic insurance(Takaful) and Islamic capital market and institutional support of Malaysia. In consumption, this study focuses on halal industry and halal certification system of Malaysia. As a result, two fields of Islamic economy in Malaysia are growing up more systematic and extensive than before. Because interest in Islam finance and style is increasing and government of Malaysia has been giving support to these fields. That is, Malaysia is aimed at global hub of Islamic finance and giving various supports to financial field. Indeed, Malaysia is making effort to internationalization and development of halal industry. From these active supports of Malaysia, Islamic economics of Malaysia will be developed and Malaysia will be a leader of Islamic economy in the world.

• 방사선산업학회지
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• 제7권2_3호
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• pp.221-224
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• 2013

RI-Biomics is a new compound word of radiation technology and Biomics related to the study of life. RI-Biomics is high radiation fusion technology by combining evaluation of pharmacokinetics in vivo (RI-ADME) of new drugs and medical materials using radioisotope and molecular imaging technology using nuclear medicine equipments. RI-Biomics fields are emerging with the increasing usage of radioisotopes (RI). In this paper, we investigated the latest trends of radioisotope using in RI-Biomics fields. The representative radioisotopes are $^{14}C$, $^3H$ and $^{32}P$ for the optimization and the selection of candidates in the development process of new drugs among the RI-Biomics fields. As shown in the status of accumulated income of radioisotopes, using amounts of radioisotopes are showing a tendency to increase every year. $^{14}C$ is 61.6% increase of accumulated income growth rate and $^3H$ increased by 58.8% and $^{32}P$ increased by 33.9% in 2012 compared to 2007. These isotopes are used in a variety of fields as using of $^{14}C$ for microdosing test, development of [$^3H$]cholesterol absorption inhibitors, study of [$^{131}I$]pyronaridine tetraphosphate for malaria therapy. These are going on in vivo test sucessfully. So, clinical research step is expected to begin soon. Therefore, usages of radioisotopes are necessary and need for the evaluation of pharmacokinetics, optimization and the selection of new drug candidates in the development process of new drugs among the RI-Biomics fields. So, using of radioisotopes is predict to increase continuously except for primarily used $^{14}C$, $^3H$.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2010년도 추계학술대회
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• pp.113-129
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• 2010

Proper pre-safety training is one of core mandatory in order to reduce injuries at the construction fields. In this study, we investigate the employee's opinions of safety training, safety recognition, the actual conditions of safety through survey. As a result of study, incident factors are roughly divided into technical factor, managerial factor, and educational factor. We confirmed that the educational factor led by deficiency of safety awareness and knowledge was the major factor. It needs to be resettled or revised properly to match with the incident trends and the safety training curriculum should also be improved and drastically revised with special quality. The managerial workers' safety recognition is lower than the site ones regarding the correct understanding of the importance of the training.. It suggest that the education method and system in construction fields might have fundamental problems.

• Journal of Biosystems Engineering
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• 제22권2호
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• pp.151-162
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• 1997

Chemical application is one of the most important field operation in rice production. Rolling of a boom due to local unevenness and softness in fields causes a local under/over-application of spray. In this study, the vertical movement of boom tips due to unevenness of ground in paddy fields was investigated, and an active pendulum suspension control system was designed and tested for compensating the movement and balancing the boom to the ground. The results for testing the performance of the control system showed that the system could balance the boom both in flat and inclined fields. The active pendulum control system developed in this study could be properly used for improving spraying performance of a boom sprayer.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2007년도 춘계학술대회B
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• pp.3098-3103
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• 2007

In this paper, natural convection of a magnetic fluids(W-40) in a half circular pipe enclosure are investigated by numerical and experimental method. One side wall is kept at a constant temperature(25$^{\circ}C$), and the opposite side wall is also kept at a constant temperature(20$^{\circ}C$). Under above conditions, various magnitudes of the magnetic fields were applied up. Theoretical study through the governing equation derived by Siliomis is carried out with numerical analysis by the GSMAC Method. And the thermo-sensitive liquid crystal film(R20C5A) is utilized in order to visualize wall-temperature distributions as an experimental method. This study has resulted in the following fact that the natural convection of a magnetic fluids are controlled by the direction and intensity of the magnetic fields.

• 한국환경복원기술학회지
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• 제19권1호
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• pp.73-83
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• 2016

Forest degradation reduces ecosystem services provided by forest and could lead to change in composition of species. In North Korea, there has been significant forest degradation due to conversion of forest into terrace fields for food production and cut-down of forest for fuel woods. This study analyzed the phenological changes in North Korea, in terms of vegetation and moisture in soil and vegetation, from March to Octorber 2013, using MODIS (MODerate resolution Imaging Spectroradiometer) images and indexes including NDVI (Normalized Difference Vegetation Index), NDSI (Normalized Difference Soil Index), and NDWI (Normalized Difference Water Index). In addition, marginal farmland was derived using elevation data. Lastly, degraded terrace fields of 16 degree was analyzed using NDVI, NDSI, and NDWI indexes, and marginal farmland characteristics with slope variable. The accuracy value of land cover classification, which shows the difference between the observation and analyzed value, was 84.9% and Kappa value was 0.82. The highest accuracy value was from agricultural (paddy, field) and forest area. Terrace fields were easily identified using slope data form agricultural field. Use of NDVI, NDSI, and NDWI is more effective in distinguishing deforested terrace field from agricultural area. NDVI only shows vegetation difference whereas NDSI classifies soil moisture values and NDWI classifies abandoned agricultural fields based on moisture values. The method used in this study allowed more effective identification of deforested terrace fields, which visually illustrates forest degradation problem in North Korea.