• Journal of Korea Soil Environment Society
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• v.5 no.3
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• pp.77-85
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• 2001

This study was carried out to show the groundwater quality in the shallow aquifer at the plastic film houses area near livestock areas in Kyong=n river. The study was conducted at 31 sites in Pogok Myon. Yongin City, Kyonggi Province on March, June and August in 1998, Medium value of CO $D_{cr}$ by survey months was as follows ; June(8.0mg/L) > April(4.4mg/L) > August(3.2mg/L). And the value of $NH_3$-N showed same tendency ; June (0.21mg/L) > April(0.08mg/L) > August (0.04mg/L). In case of nitrate- nitrogen, the changes by survey months were shown similar. But 28% of survey sites exceeded to agricultural groundwater quality reference level(20mg/L). And sulfur concentrations at some survey sites exceeded the reference level(50mg/L). But the other items of water quality were shown to suitable level for agriculture. The result showed that groundwater quality management should be taken for agricultural using at the livestock and plastic film house areas.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2020.12a
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• pp.70-70
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• 2020

참취(Aster scaber)는 국화과에 속하는 여러해살이식물로 취나물로 분류되어 전국에서 재배되고 있으며 최근 성인병 예방 효과와 무공해 건강식품으로 연중 소비가 증대되고 있으며, 주로 시설재배 작형으로 많이 재배하고 있다. 참취 시설재배지는 양분의 과다투입에 의한 염류집적과 잦은 관수로 물리성이 악화 되어 참취의 생육이 저하되어 수량이 감소하여 통상 3년 마다 종묘 갱신이 이루어지고 있다. 본 연구는 토양개량제 처리에 따른 토양 물리화학성과 참취의 생육에 미치는 영향을 검토하여 참취 시설재배 농가에 활용할 수 있는 방안을 개발하고자 시험을 수행하였다. 2018년 4월부터 2020년 11월까지 전라북도 농업기술원 허브산채시험장에서 참취 시설재배를 대상으로 무처리, 볏짚, 왕겨숯, 야자섬유 등을 10a당 1,000kg 처리하여 시기별 토양 이화학성, 생육특성을 조사하였다. 자재 처리 후 토양물리성의 변화는 볏짚 시용에서 가장 낮은 용적밀도 1.35g/cm³와 가장 높은 공극률 49.04%을 보였다. 토양 삼상 중 고상은 왕겨숯에서 52.82%로, 액상은 왕겨숯에서 30.28%로, 기상은 볏짚에서 22.45%로 가장 높았다. 토양 화학적 특성을 조사한 결과 모든 처리구에서 토양유기물 함량은 증가하였고, 유효인산은 함량은 440~487mg/kg로 낮아지는 경향을 보였다. 칼륨은 0.77~0.88cmol_c/kg로 낮아졌고, 칼슘과 11.56~14.09cmol_c/kg, 마그네슘은 2.93~3.22cmol_c/kg로 증가하였다. 생육특성은 볏짚 처리구에서 초장 26.4cm, 엽장 8.7cm, 엽폭 6.7cm, 줄기수 7.2주로 다른 처리구에 비해 좋은 생육이 좋았으며, 수량 또한 볏짚 처리구에서 1,554.3kg/10a로 가장 높았다. 지하부 생육특성은 볏짚 처리구에서 근중 83.7g/주, 근장 28.2cm, 근직경mm로 다른 처리구에 비해 생육이 양호하였다. 참취 다년재배지 정신 전 볏짚을 시용함으로써 토양의 유기물함량 증가와 용적밀도 감소, 공극율 증가 등 토양의 물리화학성을 개선하여 참취 수량성 증대효과가 있는 것으로 판단된다.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.38 no.3
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• pp.281-293
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• 2020

Recently, large and small fires have been happening more often in Korea. Fire is one of the most frequent disasters along with traffic accidents in korean cities, and this frequency is closely related to the land use and the type of facilities. Therefore, in this study, the significance of fires was analyzed by considering land use, facility types, human and social factors and using 10 years of fire data in Jinju city. Based on this, OLS (Ordinary Least Square) regression analysis, SLM (Spatial Lag Model) and SEM (Spatial Error Model) using space weights, were compared and analyzed considering the location of the fire and each factor, then a statistical model with high suitability was presented. As a result, LISA analysis of spatial distribution patterns of fires in Jinju city was conducted, and it was proved that the frequency of fires was high in the order as follow, central commercial area, industrial area and residential area. Multiple regression analysis was performed by integrating demographic, social, and physical variables. Therefore, the three models were compared and analyzed by applying spatial weighting to the derived factors. As a result of the significance test, the spatial error model was analyzed to be the most significant. The facilities that have the highest correlation with fire occurrence were second type neighborhood facilities, followed by detached house, first type neighborhood facilities, number of households, and sales facilities. The results of this study are expected to be used as significant data to identify factors and manage fire safety in urban areas. Also, through the analysis of the standard deviation ellipsoid, the distribution characteristics of each facility in the residential area, industrial area, and central commercial area among the use areas were analyzed. In, the second type neighborhood facility with the highest fire risk was concentrated in the center. The results of these studies are expected to be used as useful data for identifying factors and managing fire safety in urban areas.

• Journal of the Korean Geosynthetics Society
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• v.14 no.4
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• pp.79-86
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• 2015

Korean territories has formed about 70% of mountainous areas that have acidified serious level to average pH 4-5. There are a number of abandoned metal mines about 1,000 in Korea. However, mine tailings and waste rock included heavy metals are exposed to long-term environment without prevention facility or treatment system. Thus, ongoing management and monitoring of soil environment are required. Most of abandoned mine scattered in forest areas of slopes. Soil erosion due to continuous rainfall in the slopy areas can cause the secondary pollution by the influence eutrophication of water system and the productivity loss of the plant. Therefore, this study would like to estimate pH leaching rate by artificial rainfall using waste neutralization-agent in lysimeter. Moreover, the potentially of secondary pollution related to precipitation is figured out through the experiments, and the optimal planting methods would examinate after neutralizing treatment in soil. Experiments composed three kinds of lysimeter; lysimeter 1 had filled only acidic soil, lysimeter 2 had neutralized soil, and lysimeter 3 had planting plants after neutralized soil. In the results, lysimeter 2 showed the lowest pH leaching, and there is not specific relativity with pH leaching of the seasonal characteristics.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.4
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• pp.669-676
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• 2017

Recently, due to the importance of information security, security vulnerability analysis and various information protection technologies and security systems are being introduced as a countermeasure against cyber-attacks in new as well as existing buildings, and information security studies on high-rise buildings are also being conducted. However, security system introduction and research are generally performed from the viewpoint of general IT systems and security policies, so there is little consideration of the infrastructure of the building. In particular, the BAS or building infrastructure, is a closed system, unlike typical IT systems, but has unique structural features that accommodate open functions. Insufficient understanding of these system structures and functions when establishing a building security policy makes the information security policies for the BAS vulnerable and increases the likelihood that all of the components of the building will be exposed to malicious cyber-attacks via the BAS. In this paper, we propose an architecture reference model that integrates three different levels of BAS structure (from?) different vendors. The architectures derived from this study and the security characteristics and vulnerabilities at each level will contribute to the establishment of security policies that reflect the characteristics of the BAS and the improvement of the safety management of buildings.

• Journal of the Korea Safety Management & Science
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• v.11 no.4
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• pp.35-42
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• 2009

본 연구는 급수전('tap'과 'faucet'은 호환사용)의 종류에 따른 사용자의 조작방향에 대해 우리나라와 다른 나라의 문화적인 차이를 비교한 연구결과이다. 이를 위하여 우리들이 가정과 공공시설의 화장실이나 욕실 등에서 많이 사용하고 있는 냉 온수 일체형 레버형 손잡이 급수전과 냉 온수 분리형 손잡이 급수전을 선정하여 이의 열림 방향에 대한 스테레오타입을 파악하였다. 또한 본 실험결과와 다른 문화권의 자료를 비교하여 이의 차이를 규명함으로써 서로 다른 사용자들이 공감하는 설계방향에 대해 언급하였다. 국외 자료는 연구문헌을 참조하였으며 국내자료는 직접 10대에서 60대 이상까지 6개 연령계층의 남 여 50명씩 총 600명을 할당표본추출 방식으로 선정하여 실험을 통하여 수집하였다. 조사 결과는 각 항목별로 통합 자료, 성별, 연령별, 주손에 따라 빈도분석을 실시하였으며 카이제곱검정을 통해 성별, 연령계층별, 주손(hand dominance)별로 스테레오타입의 기대특성(expectation characteristics)에 대해 문헌을 통해 조사된 연구결과와 상호비교 분석하였다. 분석결과 우리나라 사람은 비교 분석된 다른 나라 사람과 같이 스테레오타입에 대한 통상적인(그러나 동일하진 않음) 문화적인 배경을 공유하고 있음을 알 수 있다. 본 연구결과는 급수전 손잡이 설계에 있어서 서로 다른 문화적인 배경에 따른 보편적 기대와 일치된 설계지침으로서 사용상의 편리성과 안전성을 향상시키는데 유용하게 이용될 수 있을 것이다.

• Korean Security Journal
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• no.55
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• pp.117-141
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• 2018

Police crime statistics report that residential housing such as apartment, low rise, detached houses is the second most vulnerable to crime, which is closely followed by the number of street crimes. Also residential houses are often exposed to quality-of-life crime, e.g burglary. It threatens the basic human rights of house residents in terms of safety and comfort within the urban living environment. This study examines related precedent studies regarding the vulnerability of residential housing including studios, multi-family housing from the viewpoint of crime prevention through environment design(CPTED), extracted the elements and items suitable for the safety of residential facilities and the certification evaluation indicators and check items to be the basis for the checklist are derived. Based on these evaluation indicators and inspection items, we conducted on-site surveys of residential facilities in three areas of Seoul, Yongin and Asan, and the final draft of the checklist was revised based on the results of the field survey. There are 43 items on the 7 fields of evaluation in the final version of checklist, 11 items in the management and operation, 20 items in the surveillance, 7 items in the access control, 1 item in the territoriality, 2 items in the activity support, and 2 items in the security and safety facilities. In addition, various points of interest were added to allow the administrator of the residential facility to earn points for special measures taken for safety. This checklist can be appropriately modified and utilized in consideration of the characteristics of each facility. Korean national police agency has CPOs to check the residential facilities in their jurisdiction using checklists and to certify excellent facilities with high level of safety.

• Korean Journal of Social Welfare
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• v.56 no.1
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• pp.155-179
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• 2004

This study is about the effectiveness and activation strategies of vacational training programme for the disabled guided by the Ministry of Labour and the Korea Employment Promotion Agency for the Disabled(KEPAD). This research employed quantitative approach. The quantitative research used the samples of 853 disabled people who had finished vocational training programme during recent 3 years. In this research the effectiveness is categorized into two ; product effectiveness and employment effectiveness. Product effectiveness is influenced by the kind of train-center, train-area, train-length. The KEPAD, non-IT job area and train-period over 6 month are more effective. Employment effectiveness is significantly influenced by demo-sociological factor rather than disability factor. Especially the kind of train-center is very important to be employed for the disabled. This implicates that choice of train-center by the disabled and effective management of it by the public sector is very important in developing employment. Effective management, stated above, includes reengineering programmes and functions accountable to the need form the trainee, bridging the gap among train-centers in terms of performance, differentiation of financial support according to the product to save the public fund, encouraging one special programme in one train-center.

• Journal of Korean Society of Transportation
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• v.20 no.7
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• pp.107-116
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• 2002

Crash Cushion is a kind of safety facilities on roadside which acts the role of absorbing impact energy when vehicles are driven out of normal route such as Gore area of freeway off ramp. Criteria for severity index considering accident occurrence possibility are needed to have strong effect on installing the facilities. However, present criteria for establishing crash cushion design do not include such processes. Therefore, the paper presents two kinds of study to develop criteria for severity index. First of all, development of accident forecasting model on freeway off ramp is presented. The module is a relationship between accidents and road environment by negative binomial distribution (NB) which is called to reflect very well quality of accidents at Gore of crash cushion installed freeway Secondly, freeway exiting behavior model is developed because the human factor is the most important one. However, many literatures have shown between road environment and accidents which are more quantitative than human factor. The study supposed advanced process steps on actual freeway and analysed correlation between variables and accidents. The criteria for severity index is presented to determine whether to install or not by benefit cost analysis for each module. The standard for severity index will help to determine whether to install the crash cushion or not and to estimate severity for freeway and off ramp.

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2003.05a
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• pp.113-116
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• 2003

1) 지렁이를 이용한 하수슬러지의 분변토화 공정에서 실험실 규모의 처리에서는 장기간의 부숙 기간이 필요하였으나 개방된 대형 비닐하우스 시설을 사용한 처리 시스템에서는 전처리 공정의 생략이 가능하였다. 2) 하수슬러지의 이화학적 특성을 분석한 결과 지렁이 생육 조건은 만족하였으나 중금속 함량은 부숙토 원료기준을 초과하는 경우가 있었다. 3) 인위적으로 사육상 온도 조절이 없는 비닐하우스내 사육상의 온도는 기상 조건의 영향을 직접 받고 있으므로 계절별로 슬러지 처리기간 및 지렁이 성장밀도에 차이를 나타내었다. 4) 지렁이를 이용하여 하수슬러지를 처리하고자 할 때 유해성분에 의한 지렁이의 생육에는 문제가 없었다. 그러나 슬러지와 분변토의 중금속 함량을 부숙토의 원료기준 및 제품기준과 비교하였을 때 기준을 초과하는 경우가 있었다. 따라서 지렁이를 이용하여 하수슬러지를 처리하고자 할 때 원료 및 분변토의 특성개량과 재활용성을 높이기 위하여 부원료의 개발과 활용이 필요하였다.