• Title/Summary/Keyword: climatic conditions

검색결과 539건 처리시간 0.052초

잣나무 성숙 임분의 연도별 구과 및 종자 결실량에 미치는 국지기후의 영향 (Effects of Local Climatic Conditions on Yearly Cone and Seed Production in a Mature Stand of Korean Pine)

  • 신만용;김일현;김영채;전상근
    • 한국농림기상학회:학술대회논문집
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    • 한국농림기상학회 2001년도 춘계 학술발표논문집
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    • pp.131-134
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    • 2001
  • 잣나무는 목재생산뿐만 아니라 종자생산이라는 이중적 가치와 효용성을 지닌 주요 경제수종의 하나이다. 하지만 그 동안 대면적에 조성된 잣나무 임분은 인건비의 상승과 저가의 외국산 잣의 수입으로 인해 잣 생산을 통한 수익을 기대하기가 어려운 실정이 되었다. 따라서 잣나무림의 수익 증대를 위해서는 고품질의 종자와 양질의 목재를 증산시킬 수 있는 부가가치가 높은 임분으로의 유도가 필요하다.(중략)

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염진해 오손물질의 성분 및 특성 (The Ingredient and the Properties of Contaminants)

  • 최남호;박강식;조성배;한상옥
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 1999년도 추계학술대회 논문집
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    • pp.51-54
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    • 1999
  • In this paper, the relativities, and the properties of various contaminants, which could give significant decrease in electrical insulation strength were investigated. For this investigation, the contamination degree was manually measured with brush-wiping method, and the ingredient of some specific sample was analyzed with ICP/MS. With the result, the influence of distance from sea, climatic condition contamination was investigated. And the difference in electrical properties of various salts in aquous solution was determined. Finally, we could get several significant result on the relativity and properties of contamination in various conditions

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Carbon Dioxide Budget in Phragmites communis Stands

  • Ihm, Hyun-Bin;Ihm, Byung-Sun;Lee, Jeom-Sook;Kim, Jong-Wook;Kim, Ha-Song
    • The Korean Journal of Ecology
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    • 제24권6호
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    • pp.335-339
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    • 2001
  • The dynamic model was developed to simulate the photosynthetic rate of Phragmites communis stands in coastal ecosystem. The model was composed of the compartments of both climatic and biological variables. The former were photosynthetic photon flux density(PPFD), daily maximum- and minimum-temperature. The latter were combinations of the specific physiological responses of plant organs with the biomass of each organs. The PPFD and air temperature were calculated and using those values, gas exchange rate of each plant organ was calculated at every hour. The carbon budget was constructed using the modelled predictions. Analysis of annual productivity and fluxes showed that yearly gross population productivity, yearly population respiration and yearly net population productivity were 33.4, 21.3 and 12.1 $CO_2ton{\cdot}ha^{-2}{\cdot}yr^{-1}$, respectively. The final result was tested over two stands, produced promising predictions with regards to the levels of production attained. The model can be used to determine production potential under given climatic conditions and could even be applied to plant canopies with analogous biological characteristics.

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지역 경제 활성화를 위한 전지훈련 팀 유치 활성화 전략 (A Study on the Strategy for Attraction of Off-Season Training Teams for Activation of Regional Economy)

  • 정문현
    • 디지털융복합연구
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    • 제12권6호
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    • pp.597-605
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    • 2014
  • 대전시가 추진하고 있는 전지훈련 팀 유치를 통한 지역경제 활성화 방안을 살펴보고자 관련 자료를 분석한 결과 대전시는 타 시도에 비해 훈련시설이 부족하였고, 기온, 바람, 강수량의 기후 조건도 타 시도에 비해 특별히 유리하지는 않았다. 그러므로 전지훈련 팀을 유치하기 위해서는 지역 내 전지훈련 팀의 유치를 전담할 수 있는 전담팀을 설치하고 학교, 실업 및 연맹 간 협력체계를 구축해야 하며, 전지훈련 팀의 경기력을 향상시켜 줄 수 있는 최첨단 의료 및 경기력 향상 서비스를 제공해 주어야 한다.

Local Climate Mediates Spatial and Temporal Variation in Carabid Beetle Communities on Hyangnobong, Korea

  • Park, Yong Hwan;Jang, Tae Woong;Jeong, Jong Cheol;Chae, Hee Mun;Kim, Jong Kuk
    • Journal of Forest and Environmental Science
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    • 제33권3호
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    • pp.161-171
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    • 2017
  • Global environmental changes have the capacity to make dramatic alterations to floral and faunal composition, and elucidation of the mechanism is important for predicting its outcomes. Studies on global climate change have traditionally focused on statistical summaries within relatively wide scales of spatial and temporal changes, and less attention has been paid to variability in microclimates across spatial and temporal scales. Microclimate is a suite of climatic conditions measured in local areas near the earth's surface. Environmental variables in microclimatic scale can be critical for the ecology of organisms inhabiting there. Here we examine the effect of spatial and temporal changes in microclimates on those of carabid beetle communities in Hyangnobong, Korea. We found that climatic variables and the patterns of annual changes in carabid beetle communities differed among sites even within the single mountain system. Our results indicate the importance of temporal survey of communities at local scales, which is expected to reveal an additional fraction of variation in communities and underlying processes that has been overlooked in studies of global community patterns and changes.

Oxalate Accumulation in Forage Plants: Some Agronomic, Climatic and Genetic Aspects

  • Rahman, M.M.;Kawamura, O.
    • Asian-Australasian Journal of Animal Sciences
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    • 제24권3호
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    • pp.439-448
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    • 2011
  • Oxalic acid is synthesized by a wide range of plants. A few of them are forage plants that can cause oxalate poisoning in ruminants under certain conditions. In this paper, the role of some agronomic, climatic and genetic factors in minimizing oxalate accumulation in forage plants has been discussed. Research indicates that the content of oxalate in forage can be controlled by fertilizer application. For example, nitrate application resulted in higher contents of soluble and insoluble oxalates than ammonium application. With an increased rate of potassium application, soluble oxalate content showed an increasing trend and insoluble oxalate content showed a decreasing trend. With an increased rate of calcium application, soluble oxalate content showed a decreasing trend and insoluble oxalate content showed a reverse trend. Other agronomic factors such as growing season, harvesting practices, plant maturity, plant species, plant variety and plant parts can also have a large effect on oxalate accumulation. However, the potential benefits of the above approaches for improving forage quality have not been fully exploited. In addition, there is still insufficient information to fully utilize means (e.g. plant nutrients, season and soil moisture) to minimize oxalate accumulation in forage plants. Therefore, more research is required for a better understanding of the interactions between oxalate and the above-mentioned factors in forage plants.

선호음 선택을 위한 기후조건의 유형화 (Classification of Climatic Conditions to Select Preferred Sounds)

  • 전지현;박사근;이태강;국찬;장길수
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2006년도 춘계학술대회논문집
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    • pp.722-725
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    • 2006
  • Studies on the ways to construct agreeable sound-amenity have been processed in Korea recently and Virtual Acoustics Field Simulation System (VAFSS) which is an active acoustics reproducing system has been made as a technique to realize the results of the study. This system catches the changes of surroundings and produce sounds which go well with the mood of the space. The fact that a man thinks a sound goes well with factors of the environment should be an individual evaluation. Thus, the standards to classify factors influencing the preference of the sound, which can be judged by the environment, are needed. This study suggests the standards of factors to provide agreeable sound for people according to changes of the time and other elements. Among the factors influencing environment, the temperature, the humidity and the wind were suggested as standards of discomfort Index and wind chin temperature. Besides, only the intensity of illumination has been chosen to estimate the intensity of radiation as a part of factors of the whether.

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대기 중 염분량과 건축 재료별 부착 염분량과의 관계 (The Relationship between Amount of Chloride in Atmosphere and Attached Amount of Chloride of Architectural Material)

  • 조규환;이영준;이해승;황종욱;박동천
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2013년도 춘계 학술논문 발표대회
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    • pp.98-99
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    • 2013
  • The amount of surface chlorides of architectural structure in incoming salt environment depends on the characteristics of distribution of incoming salt in atmosphere. Therefore, many researches are being conducted on deducting the correlation between incoming salt amount attached to the surface of real structure and that of atmosphere after quantitative measurement. However, in real environment, these studies are somewhat far fetched. That is because incoming salt in atmosphere are changed by various climatic conditions and in the case of the structures surface, attached incoming salt may be carried away due to the rainfall. Therefore, this study aims to draw an improved proportional relation between the amount of sodium chloride in atmosphere and that attached to the surface of architectural structures by measuring the amount attached to each architectural material using artificial incoming salt generator that can control various climatic variables that can be caused in real environment.

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An Integrated Modeling Approach for Predicting Potential Epidemics of Bacterial Blossom Blight in Kiwifruit under Climate Change

  • Kim, Kwang-Hyung;Koh, Young Jin
    • The Plant Pathology Journal
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    • 제35권5호
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    • pp.459-472
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    • 2019
  • The increasing variation in climatic conditions under climate change directly influences plant-microbe interactions. To account for as many variables as possible that may play critical roles in such interactions, the use of an integrated modeling approach is necessary. Here, we report for the first time a local impact assessment and adaptation study of future epidemics of kiwifruit bacterial blossom blight (KBB) in Jeonnam province, Korea, using an integrated modeling approach. This study included a series of models that integrated both the phenological responses of kiwifruit and the epidemiological responses of KBB to climatic factors with a 1 km resolution, under the RCP8.5 climate change scenario. Our results indicate that the area suitable for kiwifruit cultivation in Jeonnam province will increase and that the flowering date of kiwifruit will occur increasingly earlier, mainly due to the warming climate. Future epidemics of KBB during the predicted flowering periods were estimated using the Pss-KBB Risk Model over the predicted suitable cultivation regions, and we found location-specific, periodic outbreaks of KBB in the province through 2100. Here, we further suggest a potential, scientifically-informed, long-term adaptation strategy using a cultivar of kiwifruit with a different maturity period to relieve the pressures of future KBB risk. Our results clearly show one of the possible options for a local impact assessment and adaptation study using multiple models in an integrated way.