• 한국농공학회:학술대회논문집
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• 한국농공학회 2002년도 학술발표회 발표논문집
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• pp.121-124
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• 2002

국내 느타리버섯 재배 농가 중 64%가 부업형이고, 재배사 한 동의 규모도 $40{\sim}70$평 정도로 다양할 뿐만 아니라 농가당 재배규모가 적어 영세성을 면치 못하고 있는 실정이다. 이중 간이식 재배사가 70%정도를 차지하고 있어, 버섯의 가격이 가장 비싼 여름철에는 재배를 할 수 없는 실정이다. 또한 지역별, 규모별로 환경조절 설비에 대한 적정기준 뿐만 아니라 재배사 관리지침 둥도 전무한 상태이고, 오직 재배와 환경조절 설비는 경험에 의 존하고 있었다. 재배사를 신축할 경우에도 전문시공업체가 거의 전무한 상태였다. 앞으로 연중재배 시스템을 도입하여 고품질 버섯을 재배하여 국제경쟁력을 높이려면, 이러한 문제점들이 우선 선결되어야 할 것으로 판단된다.

• Journal of Ecology and Environment
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• 제44권4호
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• pp.264-274
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• 2020

Background: Climate change has altered the various ecosystem processes including forest ecosystem in Himalayan region. Although the high mountain natural forests including treelines in the Himalayan region are mainly reported to be temperature sensitive, the temperature-related water stress in an important growth-limiting factor for middle elevation mountains. And there are very few evidences on growth performance of planted forest in changing climate in the Himalayan region. A dendrochronological study was carried out to verify and record the impact of warming temperature tree growth by using the tree cores of Pinus roxburghii from Batase village of Dhulikhel in Central Nepal with sub-tropical climatic zone. For this total, 29 tree cores from 25 trees of P. roxburghii were measured and analyzed. Result: A 44-year long tree ring width chronology was constructed from the cores. The result showed that the radial growth of P. roxburghii was positively correlated with pre-monsoon (April) rainfall, although the correlation was not significant and negatively correlated with summer rainfall. The strongest negative correlation was found between radial growth and rainfall of June followed by the rainfall of January. Also, the radial growth showed significant positive correlation with that previous year August mean temperature and maximum temperature, and significant negative correlation between radial growth and maximum temperature (Tmax) of May and of spring season (March-May), indicating moisture as the key factor for radial growth. Despite the overall positive trend in the basal area increment (BAI), we have found the abrupt decline between 1995 and 2005 AD. Conclusion: The results indicated that chir pine planted population was moisture sensitive, and the negative impact of higher temperature during early growth season (March-May) was clearly seen on the radial growth. We emphasize that the forest would experience further moisture stress if the trend of warming temperatures continues. The unusual decreasing BAI trend might be associated with forest management processes including resin collection and other disturbances. Our results showed that the planted pine forest stand is sub-healthy due to major human intervention at times. Further exploration of growth climate response from different climatic zones and management regimes is important to improve our understanding on the growth performance of mid-hill pine forests in Nepal.

• 조명전기설비학회논문지
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• 제22권6호
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• pp.89-99
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• 2008

본 논문은 태양광 발전 추적 시스템의 발전량을 증가시키기 위해 일사량 급변에 대한 추적 장치 기동 시 전력소모를 고려한 새로운 추적 알고리즘을 제시한다. 종래의 태양광 발전에 사용되는 센서방식의 추적시스템은 구름 및 안개 등 급변하는 기후환경에 의해 추적 장치의 오동작의 문제점으로 태양의 정확한 추적이 불가능하다. 또한 프로그램 방식의 경우에는 기후 환경의 외부 요인에 대응하지 못함으로서 추적 장치의 불필요한 동작으로 인한 에너지소비가 발생된다. 이러한 이유로 태양 추적 장치가 실시간으로 태양의 방위각 및 고도 각을 추정하는 경우에도 실제 태양광 발전량은 특정한 위치에 고정되어 있는 경우보다 발전량이 증가하지 못한다. 본 논문에서는 이러한 전력소모를 줄이기 위한 추적시스템의 새로운 제어 알고리즘을 제시한다. 또한 종래의 태양광 추적 방식과 제시한 방법의 효율을 분석하고, 실증연구를 통하여 제시한 알고리즘의 타당성을 입증한다.

• 한국작물학회지
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• 제27권4호
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• pp.296-313
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• 1982

At a time when world population and food supply are in a delicate balance, it is essential that we look at factors to improve this balance. We can alter the environment to better fit the plant's needs, or we can alter the plant to better fit the environment. Improved technology has allowed us to increase the yield level. For moderately detrimental weather events technology has generally decreased the yield variation, yet for major weather disasters the variation has increased. We have raised the upper level, but zero is still the bottom level. As we concentrate the production of particular crops into limited areas where the environment is closest to optimum, we may be increasing the risk of a major weather related disaster. We need to evaluate the degree of variability of different crops, and how weather and technology can interact to affect it. The natural limits of crop production are imposed by important ecological factors. Production is a function of the climate, the soil, and the crop and all activities related to them. In looking at the environment of a crop we must recognize these are individuals, populations and ecosystems. Under intensive agriculture we try to limit the competition to one desired species. The environment is made up of a complex of factors; radiation, moisture, temperature and wind, among others. Plant response to the environment is due to the interaction of all of these factors, yet in attempting to understand them we often examine each factor individually. Variation in crop yields is primarily a function of limiting environmental parameters. Various weather parameters will be discussed, with emphasis placed on how they impact on crop production. Although solar radiation is a driving force in crop production, it often shows little relationship to yield variation. Water may enter into crop production as both a limiting and excessive factor. The effects of moisture deficiency have received much more attention than moisture excess. In many areas of the world, a very significant portion of yield variation is due to variation in the moisture factor. Temperature imposes limits on where crops can be grown, and the type of crop that can be grown in an area. High temperature effects are often combined with deficient moisture effects. Cool temperatures determine the limits in which crops can be grown. Growing degree units, or heat accumulations, have often been used as a means of explaining many temperature effects. Methods for explaining chilling effects are more limited.

• 한국지하수토양환경학회지:지하수토양환경
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• 제13권6호
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• pp.1-16
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• 2008

지하수 오염취약성이란 매질 자체의 고유 오염취약성과 오염 물질의 특성 또는 특정 인간 활동 등에 따른 특정 오염취약성으로 분류되며, 세계적으로 각국의 대수층 수리적 특성 및 사회환경 여건에 따라 오염취약성 평가 기법들이 개발되어 왔다. 국내에서도 지수 방법의 하나로서 지질구조선 등을 고려한 변형 DRASTIC 방법을 개발하였으나, 고유 및 특정 오염취약성에 대한 명확한 이해 및 지하수 환경 여건 등을 고려하여 국내 여건에 맞는 오염취약성 평가 기법을 개발해야 한다. 특히, 지하수법 제정 이후 지하수 기초조사, 각종 연구 프로젝트 등을 통하여 생성된 대용량의 수질자료, 수문특성 자료, 오염원자료, GIS data 등을 종합적으로 활용하여 다양한 기법을 접목, 검증해 본다면 현실성 있는 오염취약성 평가 기법이 가능할 것이다.

• 한국환경생태학회지
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• 제34권2호
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• pp.179-187
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• 2020

노인의 공원이용과 만족도에 관한 연구를 위해 서울 강동구 고덕산을 대상으로 실시하였다. 분석은 전체 항목에 대해 빈도분석을 실시하였으며, 문항의 타당성을 알아보기 위해 신뢰도 분석을 실시하였다. 이용객의 만족도에 유의한 영향으로 작용하는 항목을 파악하기 위해 요인분석을 활용하였다. 도출된 요인을 이용하여 다중회귀분석을 실시하였다. 요인분석 결과, 만족도에 미치는 요인은 3개로 구성되었고, 총 분산의 69.50%를 설명하는 것으로 나타났다. 항목간의 표본적합도를 의미하는 KMO값은 .756으로 분석되었다. 요인은 항목의 특성을 반영하여 이용적측면, 생태적측면, 쾌적성측면으로 구분하였다. 도출된 요인을 통해 다중회귀분석 결과 노인의 공원 이용만족도에 대한 다중회귀식은 Y = 3.678 + 0.202X₁ + 0.125X₂ + 0.236X₃으로 분석되었다. 본 연구에서는 전문적 지식이 부족한 노인을 대상으로 설문을 진행한 한계점이 존재한다. 향후 전문지식을 가진 노인을 대상으로 평가연구가 진행되어야 할 것이며, 연령별 생태적, 이용적, 기후적 측면 비교연구가 필요할 것으로 판단되었다.

• KIEAE Journal
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• 제10권1호
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• pp.65-72
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• 2010

The use of natural light has the potential for improving both the energy efficiency and indoor environmental quality in buildings. A light-pipe system can introduce daylight to spaces that would otherwise not be able to benefit from the advantages of daylight penetration. For the light-pipe system to be widely used in Korea, it is important to quantify its daylighting performance with due consideration regarding the effects imposed by the local climate conditions. This paper presents the evaluation results of existing semi-empirical models to predict daylighting performance of a light-pipe system. The evaluation of the existing models was based on the monitoring data obtained from a underground parking lot in which the light-pipe system was installed. Comparisons were made between the predicted and the monitored data obtained from the study. The results indicated that semi-empirical models which was developed using the experimental data obtained under the Korean climatic conditions had a good prediction performance. We also quantified the effects caused by sky conditions, solar altitudes, room dimensions, and the aspect ratio of a light-pipe system on both the daylighting performance of the light-pipe system and the indoor illuminance distributions of the space using the semi-empirical model. Finally, this paper provides the design guideline of the light-pipe system for its application to an underground parking lot space.

• 한국지반환경공학회 논문집
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• 제16권10호
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• pp.23-32
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• 2015

비탈면 붕괴와 관련된 대부분의 연구는 안정화되어 공용 중인 사면에서 발생되는 붕괴사례를 중심으로 이루어져 왔으며, 안정화가 이루어지지 않은 시공 중에 발생되는 비탈면의 붕괴특성에 대한 연구는 많지 않다. 따라서 본 연구에서는 충청지역을 대상으로 시공 중 또는 시공 직후의 비탈면에서 붕괴가 발생된 79개소를 대상으로 정밀조사를 수행하고 그 결과를 통해 기하학적인 특성과 파괴특성, 설계 및 보강방법 등의 특성을 평가하였다. 분석결과 충북권은 평면형 붕괴와 표층 붕락이 두드러지며, 충남권은 평면형 붕괴가 대다수이나 충북권에 비해 퇴적암의 표층부 붕락이나 유실이 큰 것으로 나타났다. 또한 주된 파괴인자는 충북권이 절리의 교호(53%)와 풍화(25%)로 나타났고 다방향 절리로 인한 블록화와 천매암 지역의 엽리가 영향을 미치고 있으며, 충남권도 발달된 절리(55%)가 주요요인이나 단층, 탄질셰일 등 퇴적암의 지질학적 성인(36%)도 상당한 영향을 미치고 있어 지질학적, 기후적, 환경적 특성이 비탈면의 안정에 영향을 미치는 것으로 분석되었다.

• 한국기후변화학회지
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• 제9권3호
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• pp.223-234
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• 2018

Estimation of future land cover based on climate change scenarios is an important factor in climate change impact assessment and adaptation policy. This study estimated future land cover considering Shared Socioeconomic Pathways (SSP) using Scenario Generators. Based on the storylines of SSP1-3, future population and estimated urban area were adopted for the transition matrix, which contains land cover change trends of each land cover class. In addition, limits of land cover change and proximity were applied as spatial data. According to the estimated land cover maps from SSP1-3 in 2030, 2050, and 2100, respectively, urban areas near a road were expanded, but agricultural areas and forests were gradually decreased. More drastic urban expansion was seen in SSP3 compared to SSP1 and SSP2. These trends are similar with previous research with regard to storyline, but the spatial results were different. Future land cover can be easily adjusted based on this approach, if econometric forecasts for each land cover class added. However, this requires determination of econometric forecasts for each land cover class.

• 한국인쇄학회지
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• 제30권3호
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• pp.89-114
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• 2012

For as to world, the concern about the environment problem is enhanced than any other time in the past because of being 21 century. And the environment problem is highlighted as the world-wide issue. The time of the environment problem intimidates the alive of the mankind and presence of an earth over the time. It becomes the essentiality not being selection in the personal living or the economical viewpoint now to prepare for the climatic modification. As to the company management, the green growth period which it excludes the environment management considering an environment, cannot carry on the company the continued management comes. That is, in the change center of the management paradigm, there is the environment management. Nearly, the greenhouse gas which the publication industry is the environmental toxic material like all industries is generated. The greenhouse gas is ejected in the process of running the manufacturing process and print shop of the various kinds material used as the raw material of the book. Particularly, the tree felling for getting the material of the paper is known to reach the direct influence on the global warming. This study does according to an object it considers and organizes the environment parameter based on this kind of fact as to the publication industry. And it is determined as the reference which is used as the basic materials preparing the case that carbon exhaust right transaction(CAP and TRADE) drawing are enforced in all industries and is sustainable the management of the publication industry and reduces the environmental risk among the company many risk management elements and plans and enforces the publication related policy that there is a value. In the printing publication industry, this study tried to inquire into elements discharging the environmental pollutant or the greenhouse gas. Additionally, in the printed publication production process, it tried to inquire into the effort for an environment-friendly and necessity at the printing paper and the printers ink, regarded as the element discharging the greenhouse gas all kinds of the printing materials, operation of the print shop and all kinds of the machines and recycle process, and etc. These considerations make these industrial field employees aware of the significance about a conservation and environmental protection. They try to give a help in the subsequent study producing quantitatively each environmental parameter emission of green house gas. This makes the calculation of the relative $CO_2$ output reproached ultimately possible. Meanwhile, in a sense, many research protects and improving an environment in connection with the contents of research at the printing publication industrial field is in progress. There will be the voluntary human face that it has to protect an environment but this can not do by the outside factor according to all kinds of environment related law and regulation. Anyway, because of acting on company management as the factor of oppression, the increase of this environment-related correspondence cost could know that the research that the environment loading relates with a procurement and development, environment management system introduction, quality control standard, including, normalizing including a material, and etc. through the part of the effort to reduce the cost low was actively in progress. As to the green growth era, as follows, this paper prescribed the subject and alternative of the print publication industry. It is surrounded by the firstly new digital environment and the generation of the subject. And secondly the printing industry is caused by the point of time when the green growth leaves by the topic which is largest in the global industry and it increases. The printing publication industry has to prepare the bridgehead for the environment-friendly green growth as the alternative for this resolution with first. The support blown in each industry becomes the obligation not being selection. Prestek in which the print publishing was exposed to spend many energies and which is known as the practice of the sustainable print publishing insisted that it mentioned importance of the green printing through the white pages in 2008 and a company had to be the green growth comprised through the environment-friendly activity. The core management for the sustainable printing publication industry presented from Presstack white pages is compacted to 4 words that it is a remove, reduce, recover, and recycle. Second, positively the digital printing(POD) system should be utilized. In the worldwide print out market, the digital printing area stops at the level of 10% or so but the change over and growth of the market of an analog-to-digital will increase rapidly in the future. As to the CEO Jeff Hayes of the Infoland, the offset print referred to that it of the traditional method got old and infirm with the minor phase of the new printing application like the customer to be wanted publication and the print of the digital method led the market. In conclusion, print publishers have to grasp well the market flow in the situation where a digitalization cannot be generalized and a support cannot avoid. And it keeps pace with the flow of the digital age and the recognition about the effort for the development and environment problem have to be raised. Particularly, the active green strategy is employed for the active green strategy.