• 한국환경생태학회지
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• 제17권1호
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• pp.71-82
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• 2003

난온대 지역인 완도난대수목원과 신지도, 장도 등을 사례연구 대상지를 선정하여, 기초환경 조사 및 훼손등급 사정 후, 산림기능과 복원목표식생 설정, 식생복원유형과 복원기법 등을 구상하여 사례지의 난온대 상록활엽수림 복원계획안을 제시하였다. 사회적 요구와 복원목표 등을 고려하여 산림기능은 생태계보존기능, 풍치보전기능, 임목생산기능으로 구분하였고, 복원목표식생은 붉가시나무림, 구실잣밤나무림, 후박나무림. 생달나무림, 황칠나무림 등으로 설정하였다. 식생복원유형은 보존형 복원형. 재현형, 조림형으로, 복원기법은 훼손등급에 따라 보존, 유도, 개량, 조성으로 세분하였다.

• 한국물환경학회지
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• 제35권1호
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• pp.43-54
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• 2019

The objective of this study was to assess the effect of policies on water quality management based on the changes in pollutants and water quality in Special Water Preservation Area (SWPA) of Lake Paldang watershed from 1990 to 2016. The population, total sewage and flow rate of wastewater in SWPA continuously increased from 1990 to 2016, while the location of new facilities for industrial and livestock facilities has been restricted. However, unlike the buffer zone in which industrial and livestock facilities were continuously reduced after implementing of TMDL, it was found that the effect of land-use regulations on industrial and livestock facilities in SWPA were mitigated by the increase in the size of large facilities. Since 1999 when the emission standard of public sewage treatment plants (STP) was changed, the water quality of Lake Paldang has increased despite the increase of pollutant source. Since emission standard of STP changed in 2012 (BOD 5 mg/L, TP 0.2 mg/L), BOD concentration in Lake Paldang has also improved to the level of water quality in the early 1990s where as TP concentration has remained at its lowest since 1990. BOD and TP average discharge concentration of 43 STP (${\geq}500m^3/day$) in 2016 have been maintained $1.7{\pm}0.7mg/L$ and $0.06{\pm}0.02mg/L$ respectively. While the discharged load of STP in SWPA was decreased by the concentration management, the contribution rate to the total discharged load of non-point pollutants increased to 70 % in 2015, and the contribution rate to the point discharged load of individual treatment facilities increased to 80 %.

• 보존과학연구
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• 통권30호
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• pp.93-102
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• 2009

This study was carried out to investigate the effect of artificial accelerated ageing treatment on the permanence of lining papers produced from Korea and Japan. As time gone by, organic cultural properties are affected by chemical and physical deterioration because of various factors including the conditions of preservation environment and their material properties. In the public historical storage or owned as private collections, are vulnerable to sever amages caused by poor preservation environment as well as by other natural factors. In this study, the deterioration behaviors of lining paper in optical & mechanical properties were discussed. Overall, lining papers produced from Korea showed lower reduction in mechanical strength properties compared to the lining papers produced from Japan.

• 한국토양환경학회지
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• 제4권2호
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• pp.45-53
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• 1999

본 연구는 1997년부터 1998년까지 서울시 관할구역 안의 토양오염 실태를 파악하기 위하여 설치한 측정망 90개 지점에서 토양 시료를 채취하여 분석하였다. 이 연구는 토양측정망 내의 BTEX농도를 Purge & Trap방법으로 측정, 분석하였다. 결과로서는 서울시내의 90개 지점 모두 BTEX가 검출되었다. BTEX의 1998년 최소, 최대 평균농도는 각각 0.047mg/kg, 2.618mg/kg, 0.437mg/kg 이었으며 90개 지점모두 토양환경보전법의 토양오염 우려기준(공장 산업지역)보다 낮은 농도를 나타내었다.

• 한국물환경학회지
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• 제28권3호
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• pp.394-400
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• 2012

We drew the stage-discharge relations of Byeokgye Stream, located in Yangpyeong-gun, Gyeonggi-do, and analysed the correlation between items of water pollutants by measuring the flow rate and water pollutants thirty-four times from April 2010 to December 2010. The results showed that it tended to be low water season from April to June and from October and December, while tending to be water season from July to September. The average flow rate was $2.137\;m^3/sec:\;0.464\;m^3/sec$ in low water season and $13.970\;m^3/sec$ in high water season. The stage-discharge curve thereon was $Q=40.107{\times}(h-1.200)^{2.877}$. As to the correlations, the correlation between the water temperature and COD was 0.58, and the correlations of SS with BOD and COD were 0.46 and 0.40 respectively. The correlation between SS and T-P was 0.73, showing higher than other items.

• 환경생물
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• 제36권2호
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• pp.174-179
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• 2018

Clithon retropictus has been protected by the Ministry of Environment as an endangered species since 1998 and has been listed on the state red list of endangered species category II. It is viewed as a representative for all endangered species in the northeastern coastal waters of Korea. Most of the habitats of C. retropictus have been found to be in an unstable state because of development projects such as road construction, small stream development, irrigation for securing agricultural water, and flood prevention. These habitats are damaged by small stream maintenance projects and development, and the risk of damage is increasing and active efforts are needed in order to protect them. Although the Ministry of Environment is striving to preserve this endangered species, the habitat of C. retropictus is still facing external threats because it spreads to only a small area at high densities. Therefore, in order to protect the habitat of C. retropictus, a level II endangered species, it is urgent to make an effort to minimize habitat damage and to take measures for its protection.

• 한국환경생태학회지
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• 제10권1호
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• pp.103-112
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• 1996

본 연구는 도시공원의 식생경관을 보전하여 도시의 개성과 아름다움을 창조, 유지, 관리할 수 있도록 하기 위한 기초적인 연구로써, 도시공원의 식생경관이 주변의 건축물 등과 조화를 이룰 수 있도록 개발을 유도할 수 있는 방안을 모색하고자 하였다. 광주공원의 식생경관을 대상으로 CAD에 의한 시각 시뮬레이션 응용방법에 의한 분석은 앞으로 시각 시뮬레이션 방법이 식생경관을 보전 할 수 있는 객관적인 판단 근거를 제시할 수 있는 가능성을 보여주었다. 그러나, 본 연구와 같이 근거리의 식생경관을 분석할 경우는 수목의 위치, 수목의 성상, 식생구조 등이 매우 중요한 요소로써 인식되고 있다. 따라서 분석작업의 효육을 높이고 컴퓨터의 활용효과를 높이기 위해서는 대상지에 대한 면밀한 조사방법과 수목의 표현방법, 그리고 상세한 자료입력방법에 대한 지속적인 연구가 필요한 것으로 사료된다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제17권1호
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• pp.145-164
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• 2023

Cloud computing offers a platform that is both adaptable and scalable, making it ideal for outsourcing data for sharing. Various organizations outsource their data on cloud storage servers for availing management and sharing services. When the organizations outsource the data, they lose direct control on the data. This raises the privacy and security concerns. Cryptographic encryption methods can secure the data from the intruders as well as cloud service providers. Data owners may also specify access control policies such that only the users, who satisfy the policies, can access the data. Attribute based access control techniques are more suitable for the cloud environment as they cover large number of users coming from various domains. Multi-authority attribute-based encryption (MA-ABE) technique is one of the propitious attribute based access control technique, which allows data owner to enforce access policies on encrypted data. The main aim of this paper is to comprehensively survey various state-of-the-art MA-ABE schemes to explore different features such as attribute and key management techniques, access policy structure and its expressiveness, revocation of access rights, policy updating techniques, privacy preservation techniques, fast decryption and computation outsourcing, proxy re-encryption etc. Moreover, the paper presents feature-wise comparison of all the pertinent schemes in the field. Finally, some research challenges and directions are summarized that need to be addressed in near future.

• 환경영향평가
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• 제17권1호
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• pp.11-24
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• 2008

The Korea Environmental Impact Assessment (EIA) system was introduced in 1977 through the Environmental Conservation Act. It has progressed through many laws and regulations promoting the balance between development and conservation, and functioning as a Preventitive environmental policy. Despite the efforts to minimize environmental damage from development and to uplift social awareness of environmental preservation, deficient impartiality and objectivity in completing and investigating environmental assessments, there have continously existed conflicts among related stakeholder, neglecting arrangements and ineffectiveness of public participation. This research present EIA obstacles and analyzes the overall status of the EIA through surveys from related experts. On the basis of this research, the actual complications regarding the developer, public participation, examiner and consultant are brought about. Also, remedies are proposed to ensure effective EIAs and restore confidence in them.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2004년도 추계학술대회 논문집
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• pp.329-334
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• 2004

The purpose of this study is to analyse the difference in college students' acknowledging of life environment pollution and practical consciousness between their characteristics. This study can be considered to be used as a basic data to suggest the direction of college's environment education and environmental preservation. This study was conducted using questionnaires with 216 college students (71 males and 145 females) of D University in Daegu area from September 20 to 23, 2004. Each of questions about their acknowledging of life environment pollution and practical consciousness was scored on a 5-Point Likert Scale, and then was analysed using the SPSSWIN statistic program.