• 생물환경조절학회지
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• 제8권3호
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• pp.183-191
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• 1999

순환식 담액수경 상추재배에서 양액의 pH 변화는 미량원소 수준에 관계없이 생육 중기에 낮아지다가 생육후반에 회복되었는데 양액 내에 Humus첨가에 의해 양액의 pH 변화가 완만해졌다. 생육은 Humus첨가에 의해 양호한 경향을 나타냈고 미량원소수준이 높아질수록 저조하여 Cu · Zn농도 5ppm이상에서 황화현상 등의 피해가 발생하였으며, Humus 첨가에 의해 중금속에 의한 생체중 감소가 현저히 억제되었으며 과잉피해증상이 완화되는 경향을 나타내었다. 무기성분 흡수에서는 Zn은 흡수억제 효과가 없었으나 Cu원소의 흡수는 억제되어 중금속의 피해 우려시 Humus의 효과가 어느 정도 인정된다.

• 한국물환경학회지
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• 제28권1호
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• pp.94-101
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• 2012

The performance data for eight years from a free-surface-flow constructed wetland system receiving agricultural tailwater were used to analyze denitrification rate and nitrogen treatment characteristics according to season and wetland design. Seasonal difference between growing season (March~November) and winter season (December~February) was shown in the concentration of all nitrogen species. Seasonal nitrogen treatment has similar trend with temperature and measured denitrification rate. The highest denitrification rate was measured in July, but treatment efficiency was most higher in May and June. Nitrogen absorption of vegetation could affect to these wetland performances, therefore dense population of wetland vegetation might be helpful. According to design of wetland, at least 25~50 m of wetland length was needed to decrease effluent T-N concentration to background concentration in growing season. In winter season, wetland needed much longer distance to reduce T-N concentration. Mass removal rate was continuously high through whole year because runoff coefficient was low in winter season. Applicability of constructed wetland was observed for the total maximum daily load that control T-N load.

• 환경영향평가
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• 제23권3호
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• pp.227-235
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• 2014

Interest has been growing worldwide in unconventional natural gas that has become an increasingly important source of energy in the world. Unconventional gas development, including shale gas, generally involves a larger environmental impact, compared to conventional gas development, due to its intensity and scale of the operation. There are a growing number of studies on identifying and minimizing the environmental impacts of unconventional gas development. This study aims to examines the current environmental policies and regulatory systems related to the unconventional gas development. The study shows that few environmental regulation exists concerning unconventional gas development, even in the USA where unconventional gas development is most actively pursued. Regulations, however, are being developed based on studies currently underway on health and environmental risks of unconventional gas development and on guidelines designed to reduce the risks. In a world where environmental regulations are ever strengthening, review the environmental regulatory systems and guidelines about unconventional gas need to be established for Korean firms to understand environmental impacts of unconventional gas development they invest or take part in, enabling them to manage and operate gas activities in a way that minimizes environmental damages.

• 경영과정보연구
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• 제3권
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• pp.419-438
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• 1999

Following is an idea to utilize the business ethics as one of business administration strategies. Firstly, conversion of perception is needed in the business administration. Neglecting the pursuit of profit, the conventional strategic goal, is not desirable, we need to, however, have a mind that the consumer and environment centered mind is indispensible to the survival and growing of a business ultimately in establishing a strategic goal of diversified environmental changes. Secondly, conversion of the Chief Executive Officer (CEO)'s attitude in business administration is needed. It is necessary for the CEO to have a strong belief that the business ethics is indispensible to the survival and growing of a business by way of fair and logical management. Therefore the business ethics should be improved since the CEO's ethics can be the standard of his business. Thirdly, the business concerned parties should be considered. The realization of business ethics should be done in a certain way so as to protect the benefit of the all concerned parties such as stockholders. employees, consumers, suppliers, competitors, the local community, etc., since a business is an organization that can exists and grows only in the coexistence with its environment and concerned parties. Fourth, the business ethics should be transformed into a business culture through the enlargement of the general principles of and of employees' behavior as a management strategy. Lastly, business ethics should be improved through continuous evaluations to accommodate its environmental change.

• 디지털산업정보학회논문지
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• 제11권4호
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• pp.81-87
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• 2015

Recently, with the development of the ICT environment, the use of the software is growing rapidly. And the number of the web server software used with a variety of users is also growing. However, There are also various damage cases increased due to a software security vulnerability as software usage is increasing. Especially web shell hacking which abuses software vulnerabilities accounts for a very high percentage. These web server environment damage can induce primary damage such like homepage modification for malware spreading and secondary damage such like privacy. Source code weaknesses checking system is needed during software development stage and operation stage in real-time to prevent software vulnerabilities. Also the system which can detect and determine web shell from checked code in real time is needed. Therefore, in this paper, we propose the system improving security for web server by detecting web shell attacks which are invisible to existing detection method such as Firewall, IDS/IPS, Web Firewall, Anti-Virus, etc. while satisfying existing secure coding guidelines from development stage to operation stage.

• 해양환경안전학회지
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• 제14권3호
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• pp.205-210
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• 2008

화석연료 사용으로 인한 환경오염 및 에너지원가 상승이 큰 문제로 대두되고 있는 현재의 상황을 타개하기 위한 하나의 방안으로 신 재생에너지에 대한 관심이 고조되고 있다. 특히 서해안에 위치하고 있는 새만금 지역은 광활한 면적과 서북서풍이라는 큰 장점을 가지고 있어 풍력발전의 적지로 예상된다. 본 연구는 이러한 예상을 뒷받침해 줄 수 있는 풍력자원을 조사한 것으로 군산지역의 평균풍속은 4 m/s 정도이며, 도서지방을 연계하는 해상풍력발전 단지의 최적지로 손색이 없음을 밝혔다. 또한, 풍력자원의 출현밀도를 판별하는 Weibull의 분포함수를 이용하여 계산하고, 형상계수를 매개변수로 하여 풍속밀도계산을 한 결과, 군산지방의 풍속출현을 예상할 수 있었다.

• Asian Journal of Business Environment
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• 제11권3호
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• pp.21-32
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• 2021

Purpose: Research aims to analyze the influence of ICT on regional economic growth in Indonesia Provinces are grouped using Klassen's typology, which divides four quadrants based on economic growth and GRDP per capita. Considering similarity characteristics, four typology categories are finally simplified into two named categories: the "rapidly developed and growing" region and the "relatively lagged" region. Research design, data and methodology: The study uses panel data of 33 provinces in Indonesia from 2012 to 2018. It employs panel regression analysis to determine the impact of ICT on the regional economic growth of both regions. Results: The study reveals the percentage of households that own computer and the percentage of households who have accessed the internet in the last three months have a positive and significant influence on the GRDP per capita in the "relatively lagged" region. Meanwhile, mean years of schooling has a positive and significant impact on both regions. Conclusions: In the "rapidly developed and growing" region, only mean years of schooling has a positive and significant effect on GRDP per capita, whilst in the "relatively lagged" region, percentage of households that own computer, percentage of households who have accessed the internet in the last three months, and mean years of schooling have a positive and significant impact on GRDP per capita in Indonesia.

• 인간식물환경학회지
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• 제23권1호
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• pp.55-65
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• 2020

This study conducted a survey on 163 parents in Korea to investigate their interest in plants, experience in growing plants, and perception on horticultural activity programs (HAP) for their children. Most children (80.4%) of the respondents had experience participating in HAPs, and most of their experience occurred during school hours in preschool educational institutions more than once a month (60.3%). The more interest in plants and experience in growing plants the parents had, the more experience the preschoolers had in participating in HAPs, which implies that the experience of the parents with plants affected their children's participation in HAPs. Parents' most preferred location of HAPs was preschool educational institutions, and most preferred time was school hours with a frequency of more than once a week (57.1%), which is more frequent than the current status of HAPs in preschool educational institutions. Parents also responded that the most preferred instructors of HAP has are those with a professional background in horticulture. Among the activities in HAP for preschoolers, parents most preferred cooking (M = 4.05) activity, and they did not dislike any of the activities. They responded that the facilities for HAP needed to be improved to make HAP more active in preschool educational institutions. Overall, based on the current results, developing suitable HAPs and facilities for preschoolers, fostering professional HAP instructors, and educating parents about horticulture would enhance HAPs in preschool educational institutions, thus providing preschoolers with many benefits of HAPs.

• 한국환경생태학회지
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• 제23권4호
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• pp.346-352
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• 2009

본 연구는 해식애 식생구조의 기초자료로 제공하기 위하여 배열법으로 갯기름나물군락과 동반출현하여 혼생하는 주요 식물의 지형적 분포 및 생육 양상을 분석하였다. 해식애의 갯기름나물군락에서 10% 이상의 출현빈도를 나타내는 혼생식물은 26종이었으며, 출현 빈도가 가장 높은 식물은 해국(55.7%)이었다. 갯기름나물군락의 혼생식물은 내륙육지 방향, 해안선방향, 평탄면, 사면 등의 지형요인별 분포 및 생육 양상을 달러하였다. 그리고 분포 및 생육 양상은 모든 지형요인에서 차이가 없이 고르게 분포하는 전형적 형태, 1개의 지형요인에서 양호한 분포를 나타내는 일방적 형태, 2개 또는 그 이상의 지형요인에서 양호한 분포를 보이는 복합적 형태로 구분되었다. 사철쑥과 땅채송화 등은 전형적 형태, 갯보리와 쑥 등은 일방적 형태의 분포 및 생육 양상을 나타내었고, 해국억새 갯메꽃 갯까치수영 등 16종(전체 혼생식물의 61.5%)의 식물이 복합적 형태로 갯기름나물과 혼생하여 양호한 생육을 보였다.

• 한국버섯학회지
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• 제20권3호
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• pp.127-137
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• 2022

느타리 균상 패널재배사에 상향과 하향 등 양방향으로 바람 토출이 가능한 정역 제어 대류팬(시험구)과 상향으로만 바람을 토출하는 관행 유동팬(대조구)을 이용한 경우에 대하여 내부환경과 버섯품질을 조사하였다. 재배 주기별 첫 수확 2일 전의 기온과 상대습도 편차를 조사한 결과, 시험구(1주기: 1.0-1.3℃와 7.8-9.0%, 2주기: 0.7-1.1℃와 10.0-11.4%)가 대조구(1주기: 5.8-6.4℃와 21.3-23.1%, 2주기: 3.4-5.7℃와 14.6-18.3%)보다 공기 균일도가 향상된 것으로 나타났다. 버섯품질의 경우 재배 주기에 따라 다소 차이를 보였는데 배지 세력이 큰 1주기에서는 정역 제어 대류팬을 적용시킨 경우가 관행 유동팬 적용에서보다 버섯품질이 다소 우수하였으나 배지 세력이 다소 약해진 2주기에서는 다소 떨어지는 것으로 나타났다. 2주기에서 공기 균일도가 향상되었음에도 버섯품질이 다소 떨어진 것은 하향으로의 바람이 버섯 생육에 영향을 주었기 때문인 것으로 판단되었다. 향후 균상 재배단 내측과 외측에서의 풍속 계측이 필요할 것으로 판단되었으며 정역 제어 대류팬의 운영 매뉴얼이 필요할 것으로 판단되었다.