• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 2000년도 THE THIRD INTERNATIONAL CONFERENCE ON AGRICULTURAL MACHINERY ENGINEERING. V.II
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• pp.204-209
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• 2000

At harvest, the starch contents of apples, which were related to their maturity, were quantified by using image analysis. The stained area was measured by a computer vision system when an apple slice was stained with KI/I$_2$ solution. The stained area ratio of the stained area of the apple slice to its whole area, or the starch index, was defined as an indicator of starch content. When Tsugaru apples were manually sorted into immature, turning and mature groups, their starch indices were 0.374, 0.312 and 0.129, respectively. Meanwhile, the starch index had correlation to various physicochemical properties of Tsugaru apples. At the statistically significant level of 0.1 %, it was correlated with the pH value, bio-yield force, rupture force and color of intact and skin-removed apples. At the 1 ％ significant level, it had the correlation with the density and moisture content.

• 한국토양비료학회지
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• 제46권5호
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• pp.303-307
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• 2013

Research reports on soil during the years from 1906 to 2012 have been analyzed to understand the role and pattern of soil research in agriculture. The number of research reports in relation with the key word of soils were 2,211 cases and classified in accordance with the criteria of research area, research subject, and research place of report papers. During the 40 years from 1906 to 1946, research work on soil chemistry was reached 62%, highest in the research area. In the case of research subject, research reports on soil fertility and soil nutrients was highest as 42.2%, and the next subject on soil salt and desalinization was about 19.5%. Research places were in the order of paddy as 34.1%, upland as 23.7%, and reclaimed soil as 22.5%. From 1953 to 2012 during 60 years, in the research area report papers were mainly concentrated on chemistry area as 32% and the next was physics as 26%, and environment as 12%. In the case of research subject during the same period, nutrient management report was reached 21.1%, and soil improvement on chemical and physical properties for optimum crop growth was 11.9%. Soil survey and data base establishment report was 8.6%. Research place were in the order of upland as 34.9%, paddy as 25.7%, and vinyl house as 12.5%, which showed reversed pattern compared to that of before 40 years.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2007년도 Proceedings of ISRS 2007
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• pp.518-521
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• 2007

To retrieve Sea Surface Temperature(SST) from NOAA-AVHRR imagery the spilt window atmospheric correction algorithm is generally used. Recently, there have been various new algorithms developed to process these data, namely the variable-coefficient split-window, the R54 transmittance-ratio method, fixed-coefficient nonlinear algorithm, dynamic water vapour (DWV) correction method, Dynamic Water Vapour and Temperature algorithm (DWVT). We used MCSST (Multi-Channel Sea surface temperature) and NLSST(Non linear sea surface temperature) algorithms in this study. The study area is around the Korea sea area (Yellow Sea). We compared and analyzed with various methods by applying each Ocean in-situ data and satellite data. The primary aim of study is to verify and optimize algorithms. Finally, this study proposes an optimized algorithm for SST retrieval.

• 대한조선학회 특별논문집
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• 대한조선학회 2007년도 특별논문집
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• pp.79-88
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• 2007

In this study, we improved the layout of deckhouse pre-erection area where erects the blocks and developed the pre-erection block arrangement system for the improvement of productivity and effectiveness. The major operating point of the pre-erection area is to fabricate as many as possible that has restrict area and working plate. The developed system has information management module, scheduling module, schedule control module, statistics module, and information integrate module. The heuristic algorithm is issued and evaluated with real data. And genetic algorithm is used for the evaluation of issued it.

• 한국초등수학교육학회지
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• 제16권3호
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• pp.451-469
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• 2012

본 연구는 초등학교 6학년 학생들의 넓이 개념 이해의 여러 측면을 조사하고 보고하는 데에 그 목적이 있다. 본 연구에서는 넓이의 의미 이해, 평면도형(직사각형, 평행사변형, 삼각형)의 넓이 구하기, 넓이 공식 제시하기, 넓이 공식의 성립 이유 설명하기 등과 관련된 총 4개의 문항들로 검사지를 구성하였으며, 이 검사지를 활용하여 초등학교 6학년 학생 122명의 넓이 개념을 조사하였다. 본 연구의 결과, 학생들은 넓이의 의미 이해에서 가장 낮은 수행 정도를 나타냈으며, 그 다음으로는 넓이 구하기, 넓이 공식 제시하기, 넓이 공식의 성립 이유 설명하기의 순서로 낮은 수행 정도를 나타냈다. 한편, 학생들은 넓이 공식 제시하기에서 직사각형, 삼각형, 평행사변형의 순서로 낮은 수행 정도를 나타냈으며, 넓이 공식의 성립 이유 설명하기에서는 삼각형, 평행사변형, 직사각형의 순서로 낮은 수행 정도를 나타냈다. 이러한 결과를 바탕으로 본 연구에서는 학생들의 이해가 미흡한 것으로 나타난 부분을 개선하기 위한 교수학적 시사점을 제안하였다.

• 한국실내디자인학회논문집
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• 제24권3호
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• pp.156-164
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• 2015

Nursing Homes do not have a defined standard in the space area nor does it have a detailed standard facility requirement by law. This can possibly lead to the deterioration of the facility and the system. This directly affects the medical treatment space area within the nursing home. The medical treatment area provides medical treatment to seniors and this is where the seniors get most of their daily services. Therefore, this is research is about the study of the space area of the medical center and the ratio trend of the space area for the medical treatment facility located in senior nursing homes. Ten facilities have been selected in this study to analyze the correlation factors between space area and its trends. The analysis performed includes the conditions relating to the area and what affects the center. We have followed up with a proposal for improvement of the facility and area configuration for the medical treatment facility. Based on the analysis, the following conclusion can be made: First, the senior welfare centers are mostly used as a residence purpose followed a temporary stay of residence facility for the seniors. Second, research indicates that the bigger the facility, nursing and public functions took a larger portion of the space area compared to other services within the senior welfare centers. Third, the study shows the management space area took up about 1%~6% of the entire medical center within the nursing home which is a narrow space area because of the integrated management. Fourth, analysis based on the trend in the time-series indicate after the adoption of the system, there is a continued decline in the space area of nursing, management and public areas. Lastly, since before and after 2008, the space area composition of the nursing facility shows a continuous decline in our study. We can safely conclude that the revised senior welfare act's construction plan has an effect in the facility and is effectively working to meet its requirement. Therefore, the revision of the law is required to reflect the social needs of the residents.

• 한국수산과학회지
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• 제45권5호
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• pp.460-464
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• 2012

From 1998 to 2008, the bacteriological quality of seawater in Kamak Bay, Korea, was monitored. The total and fecal coliforms in seawater were monitored as bacterial indicators, and the level of fecal coliform contamination was used to evaluate seawater quality. In the southern shellfish growing area of Kamak Bay, the observed fecal coliform geometric mean (GM) and estimated 90th percentile did not exceed the quality standards for fecal coliforms in seawater in Korea and th USA (GM<14 MPN/100 mL, 90th percentile<43 MPN/100 mL). The GM and estimated 90th percentile of the fecal coliform levels in the adjacent northern area of Kamak Bay were higher than in the southern area. Stations near wastewater discharge sites and urban areas in the north had the lowest quality and did not meet the bacteriological seawater quality criteria. The high fecal coliform levels in the Seonso coastal region near wastewater discharges and northern urban areas declined significantly following dredging and operation of a sewage treatment plant.

• 한국환경보건학회지
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• 제46권4호
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• pp.398-409
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• 2020

Objectives: This study aimed to evaluate environmental exposure to tobacco-specific nitrosamines (TSNAs) by conducting an analysis of the concentration of TSNAs in deposited dust collected from a fertilizer plant and the surrounding village, a simulation of high-temperature drying of tobacco waste, and CALPUFF modeling. Methods: The raw materials of the products, deposited dust (inside and outside the plant and residential area), soil, and wastewater were sampled and the TSNA concentrations were analyzed by LC-MS/MS. As the plant was closed down before the investigation, simulation tests were conducted to confirm the substances discharged during high-temperature (300℃) drying of tobacco waste. CALPUFF modeling was performed to identify the area of influence due to exposure to TSNAs. Results: TSNAs were detected in organic fertilizers estimated to contain tobacco waste, deposited dust, and soil collected from inside and outside the plant. N'-nitrosonornicotine (NNN), 4-(methylnitrosoamino)-1-(3-pyridyl)-1-butanone (NNK), and N'-nitrosoanatabine (NAT) components were detected in five of 15 deposited dust samples collected from the residential area around the plant, while TSNAs were not detected in the five sampling points in the control area. Also, the simulation test for the high temperature drying of tobacco waste found emissions of TSNAs. The CALPUFF modeling results showed that the survey area was likely to be included in the area of influence of TSNA emissions from the plant. Conclusions: It is estimated that harmful tobacco ingredients such as TSNAs were dispersed in nearby areas due to the illegal use of tobacco waste as a raw material to produce organic fertilizers at the plant. These findings assume that the residents have been exposed to TSNAs and suggest that the need for the establishment of measures to manage environmental health.

• 디지털융복합연구
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• 제13권6호
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• pp.297-305
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• 2015

최근 건강증진을 위한 장소로서 산림을 이용하는 활동이 활발하게 일어나고 있다. 산림청에서는 산림을 이용하여 웰빙과 건강증진을 실현하기 위한 새로운 융복합적 시도를 하였으며, 이를 '산림치유'라 정의하고, 치유의 숲을 조성하여 산림치유서비스를 제공하고 있다. 그러나 현재 치유의 숲은 대도시와 접근성이 떨어지는 위치에 조성되어 있어 치유활동이 필요한 교통약자들이 산림치유 활용에 어려움이 있다. 또한, 현재 치유의 숲 조성을 위한 면적기준은 대도시의 파편화된 산림 면적에는 적합하지 않기 때문에 대도시 치유의 숲 조성에 어려움을 겪고 있다. 이에 대도시 치유의 숲에 대한 적정 면적기준을 도출하기 위하여 본 연구를 진행하였다. 기존의 도시숲을 활용한 야외공간에 대한 조성면적 기준 현황을 검토하고, 치유활동이 필요한 교통약자의 보행권을 조사하여, 면적기준과 보행권의 분석을 복합적으로 진행하였다. 도시자연공원, 관광단지 등 유사 야외휴양공간의 면적기준에 비하여 치유의 숲 면적 기준은 대도시 환경에 맞추어 세분화되어 있지 않았다. 또한, 교통약자의 보행권을 고려하여 대도시 치유의 숲 조성을 위한 최소 면적기준을 산출한 결과, 국공유림 25만제곱미터 이상, 사유림 15만제곱미터 이상으로 나타났다. 본 논문은 대도시 지역의 치유의 숲 적정 면적기준에 대한 정책적 근거로서 활용할 수 있을 것이다.

• 한국환경보건학회지
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• 제48권2호
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• pp.86-95
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• 2022

Background: As high concentrations of uranium and radon have been detected in some areas in Korea, it is considered necessary to investigate natural radioactive materials in the Gwangju area. Objectives: This study aimed to identify the hydrochemical characteristics of groundwater in Gwangju and investigate the distribution characteristics of uranium and radon, which are naturally radioactive substances. Methods: To determine the uranium and radon concentrations in groundwater according to the geology of the Gwangju area, we measured 62 groundwater wells. A geological distribution map of uranium and radon content was prepared for this study. Results: The groundwater type, defined using a Piper diagram, was mainly Ca-HCO₃. The concentration of uranium in the groundwater ranged from 0 to 29.3 ㎍/L, with a mean of 3.3 ㎍/L and a median of 0.9 ㎍/L. The median concentration of uranium in groundwater was highest in alluvium, granitic gneiss, and biotite granite (classified by geological unit), in that order. The concentration of radon in the groundwater ranged from 4.8 to 313.2 Bq/L, with a mean of 75.6 Bq/L and a median of 59.6 Bq/L. The median concentration of radon in groundwater was highest in biotite granite, alluvium, and granitic gneiss, in that order. As a result of the correlation analysis of groundwater in the study area, there was no significant correlation between uranium and radon. Conclusions: In this study area, uranium was shown to be far below the concentrations allowed by drinking water quality standards, but radon concentrations exceeded drinking water quality monitoring standards in 11% of the samples. It was judged that appropriate measures, such as the installation of radon reduction facilities, will be required after a thorough review of high-concentration radon detection sites of in the research area.