• 제목/요약/키워드: Growing Distribution

검색결과 1,037건 처리시간 0.022초

순채 생육지에서 수체와 저토의 환경요인 분석 (Characterization of Water and Sediment Environment in Water Shield (Brasenia schreberi) Habitats)

  • Kim, Yoon-Dong
    • The Korean Journal of Ecology
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    • 제19권3호
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    • pp.209-216
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    • 1996
  • In order to identify the habitat characteristics of water shield (Brasenia schreberi), water quality and sediment characters were investigated. Water shield had peculial habitats such as old reservoir, developed basin-like reservior, a water depth within 1.5 m, constant water level, and thick sediment layer at the bottom. The species had very dense populations under the favorable growing conditions and occasionally grew together with Utricularia japonica. When water shield decreased, Nelumbo nucifera, Nuphar japonicum and Zizania latifolia increased. Natural populations of water shield need protection because it is endangered by the human activities and their harvest. The optimal conditions for the growth of water shield was near neutral pH. low conductivity and low turbidity. Therefore the input of pollutants should be controlled for its growth. The inorganic ion contents such as K, Mg, and Na were higher in the water shield growing area. Especially iron content of the sediments in the reservoirs with water shield was nearly five times as high as that in the reservoirs without water shield. thus iron might be one of the major limiting factors for the growth. It was considered that molybdenum can be another major factor because water shield is a nitrogen fixing plant.

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경북대학교 내에 생육하는 애기자운(Amblyotropis verna) 자생지의 식생특성과 관리방안에 관한 연구 (A Study on Vegetation Characteristics and Management of Amblyotropis verna Habitats in Kyungpook National University)

  • 박인환;조광진;이혜영;장갑수
    • 한국환경복원기술학회지
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    • 제13권5호
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    • pp.51-58
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    • 2010
  • This study was done to recommend a method for conserving the habitat of Amblyotropis verna grown naturally in campus of the Kyungpook National University at Daegu city. Vegetation characteristics and morphological characteristics of each individual were analyzed for the condition of the population at the growing season from May to June in 2010. Totally 11 vegetation data were collected and analyzed, and one vegetation community including Amblyotropis verna (Amblyotropis verna-Zoysia japonica community) was found. We found that the growing condition was not good with severe stamping and disturbance. The location-determining method by PCoA analysis showed the physical texture in soil was a critical factor determining the spatial distribution of the Amblyotropis verna-Zoysia japonica community. And the analysis of morphological characteristics found that light condition and soil hardness were the main ecological factor determining the size and form of each individual. Finally, this study recommend that minimizing impacts by human stamping and artificial disturbance and reducing the water stress were the best ways for the conservation of Amblyotropis verna habitats.

The Impact of Information and Communication Technology (ICT) on Regional Economy in Indonesia 2012-2018

  • DEWI, Dyah Makutaning;WULANSARI, Ika Yuni
    • 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.

A Study on the Consumer Perception and Keyword Analysis of Meal-kit Using Big Data

  • Jung, Sunmi;Ryu, Gihwan;Lim, Jeongsook;Kim, Heeyoung
    • International Journal of Internet, Broadcasting and Communication
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    • 제14권2호
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    • pp.206-211
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    • 2022
  • As the level of consumption is improved and cultural life is pursued, the consumer's consciousness structure is rapidly changing, and the demand for product selection level, variety, and quality is becoming more diverse. The restaurant economy is falling due to the prolonged COVID-19, the economic recession, income decline, and changes in population structure and lifestyle, but the Meal- kit market is growing rapidly. This study aims to identify the consumer perception of Meal-kit, which is rapidly growing as an alternative to existing meals in the fields of dining out, food, and distribution due to the development of technology and social environment using big data. As a result of the analysis, the keywords with the highest frequency of appearance were in the order of Meal-kit, Cooking, Product, Launching, and Market and were divided into 8 groups through the CONCOR analysis. We want to identify consumer trends related to the key keywords of Meal-kit, present effective data related to Meal-kit demand for Meal-kit specialized companies, and provide implications for establishing marketing strategies for differentiated competitive advantage.

한국 해안에 자생하는 김파래과에 관한 본초학적 연구 (A Herbological Study on the Bangiaceae Growing in the Korean Coastal Waters)

  • 정종길
    • 대한본초학회지
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    • 제39권4호
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    • pp.11-17
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    • 2024
  • Objective : The purpose of this dissertation is to make a list of the Rhodophyta growing naturally in the Korean coastal waters, and to carry out a survey on the current distribution status to investigate the Bangiaceae which can be used as medicinal herbs. Methods : References and research papers about herbology published at home and abroad were examined. Results : A list was made about Bangiaceae plant which were cultivated or grew naturally in Korea, after investigated the data on domestic and foreign Bangiaceae plants. Out of those lists, serviceable plants were selected , their distributions were analysed. 1. A total of 2 genera and 18 species of Bangiaceae were found in the Korean coastal waters among which 1 genera and 4 species(approximately 22%) were medicinal plants. 2. Out of the 18 species of Bangiaceae 16 species belonged to Porphyra, and out of the 4 species of medicinal plants 4 species belonged to Porphyra. 3. Among the medicinal parts 4 species belonged to algae species had cold property, and had salty and sweet flavors. 4. 4 species had the efficacy of Lung, Spleen and bladder meridian had the potency of soften hardness, which helps to remove hard clots generated, cure phlegm in human body. 5. No toxic drugs were detected. Conclusion : There were totaled to 18 genera and 2 species in Bangiaceae in Korea and among them medicinal plants are 1 genera, 4 species, some 22% in total.

성장 환경을 활용한 다수의 나무에 대한 사실적인 실시간 모델링 기법 (Realistic and Real-Time Modeling of Numerous Trees Using Growing Environment)

  • 김진모;조형제
    • 한국멀티미디어학회논문지
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    • 제15권3호
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    • pp.398-407
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    • 2012
  • 본 연구에서는 넓은 지형에 분포하는 많은 수의 나무를 사실적이면서 효율적으로 표현하는 나무 모델 방법을 제안한다. 나무 가지의 재귀적 계층 구조와 싹으로부터 자기조직화를 통한 가지 생성 과정을 결합하여 단순화시킴으로써 보다 직관적이고 효율적으로 나무를 생성한다. 이러한 생성 과정은 사용자가 단계별 구조와 가지 길이, 분포, 방향과 같은 외형 조절을 인터랙티브하게 제어할 수 있도록 한다. 또한 많은 수의 나무를 동시에 제어하여 다양하게 성장시킬 수 있도록 하는 환경 적응형 모델을 설계하고 이를 효과적으로 처리하는 성장 환경 적용 방법을 제안한다. 여기에 넓은 지형위에 분포하는 복잡한 나무 모델의 실시간 시뮬레이션을 위해 GPU(Graphics Processing Unit)를 통한 렌더링 과정과 가지 표면의 연속적 세분화단계, 그리고 인스턴싱 기법을 도입한다. 제안한 나무 모델을 통해 넓은 지형에 다양한 나무를 사실적이고 효율적으로 표현할 수 있는지 여부를 시뮬레이션을 통해 확인한다.

Water Deficit of Pitch Pines Caused by Superficial Rooting and Air Pollutants in Seoul and Its Vicinity

  • Joon-Ho kim;Rhyu, Tae-Cheol
    • Journal of Plant Biology
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    • 제37권3호
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    • pp.309-316
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    • 1994
  • To make regional comparisons of water status of pitch pine, the temporal changes of water status in pitch pine were investigated at different areas; urban Seoul (heavily polluted area), surburb of Seoul (lightly polluted area), and rural area (control). The effects of air pollutants, acid rain and chemical properties of soil on water deficit in pitch pine were also investiaged. Water content of needles growing at polluted areas were usually lower than that at unpolluted area. Water saturation deficit of needles growing at polluted areas were usually higher than that at unpolluted area especially in dry season. These results indicated that water in needles growing at polluted areas were usually more deficient than that at unpolluted area, and were more deficient in April than other months. At polluted areas, the older the needles were, the more quickly transpirated the water in the needle was. At unpolluted areas, however, water in old needles was not so quickly transpirated as those at polluted areas. Water potential of needles of pitch pine seedlings treated with simulated acid rain (SAR) of pH 3.5 decreased more quickly than that of needles treated with SAR of pH 5.6. Loss of water through epicuticular layer was greater in the following order: magnesium deficiency+100 $\mu$M aluminium>100$\mu$M aluminium>magnesium deficiency>control. In addition to Mg deficiency and Al toxicity, growth decline of pitch pine widely occurring in polluated Seoul could to a large extent be due to cuticle degredation and abnormal vertical distribution of fine roots, which lead to water stress, particularly in dry seasons.

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제주 성읍민속마을의 귀화식물 분포현황 및 관리방안 (A Study on the Distribution Status and Management Measures of Naturalized Plants Growing in Seongeup Folk Village, Jeju Island)

  • 노재현;오현경;한윤희;최영현;변무섭;김영숙;이원호
    • 한국전통조경학회지
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    • 제32권1호
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    • pp.107-119
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    • 2014
  • 제주시 성읍민속마을을 대상으로 관속식물상 및 귀화식물의 현황을 조사하고, 여타 민속마을과 제주도 전역에 분포하는 귀화식물의 분포양상 및 발생특성과 비교 고찰함으로써 이곳의 귀화식물의 관리방안을 모색할 목적으로 시도된 본 연구의 결론은 다음과 같다. 성읍민속마을의 관속식물상은 93과 260속 298종 44변종 12품종으로 총 354분류군이 확인되었으며, 이 중 귀화식물은 22과 46속 53종 2변종의 총 55분류군으로 이는 제주도 전역에서 확인된 총 254분류군의 21.7%에 해당된다. 이에 따른 성읍민속마을의 귀화율은 15.5%로서 이는 경북 안동의 하회마을, 경주의 양동마을, 성주의 한개마을, 강원 고성의 왕곡마을 그리고 충남 아산의 외암마을에 비해 월등히 높은 수치였다. 마을내 발생한 귀화식물 중 분포지가 제주도에 한정되어 있는 것은 양장구채, 국화잎아욱, 애기달맞이꽃, 긴잎달맞이꽃, 솔잎미나리, 자주풀솜나물, 선풀솜나물, 큰참새피, 등심붓꽃 등 9분류군으로, 귀화식물의 이입 관문이자 선구 발생지로서의 특성을 살린 적절한 관리전략이 필요한 것으로 판단된다. 한편 본 연구를 통해 제주도 기준목록에는 포함되지 않았던 까락빕새귀 리, 삼, 눈개불알풀 등 3분류군이 성읍민속마을에서 처음으로 확인되었다. 단위문화재 정원내 발생한 귀화식물은 총 20분류군으로 이 중 유럽점나도나물의 출현율이 62.5%로 가장 높았으며, 미국자리공 선개불알풀 망초 방가지똥 큰방가지똥(37.5%)도 비교적 높게 나타났는데 이는 제주도뿐만 아니라 대부분의 민속마을과 레크레이션공간의 공통된 특성으로 보인다. 한편 경관관리적 취급이 요망되는 식물군락은 유채를 비롯하여 귀화식물인 코스모스, 토끼풀, 잔개자리, 긴잎달맞이꽃, 애기달맞이꽃, 서양벌노랑이, 호밀풀, 양장구채, 서양금혼초, 미국질경이, 큰이삭풀, 유럽점나도 나물 등으로 분석되었다. 성읍민속마을의 단기적 귀화식물 관리방안으로는 경관농업적 차원에서 식재되고 있는 코스모스와 유채의 임내 침투 현황과 개화 후 활용 방안의 모색이 필요하다. 환경부가 지정한 생태계교란야생식물인 돼지풀과 서양금혼초는 우선적으로 제거하고, 재발에 대비한 추가 발생과 확산과 팽창을 염두에 둔 모니터링의 실시를 제안한다. 특히 서양금혼초는 서식밀도 파악 및 제근 등 물리적인 방제방안이 강구되어야 할 것이다. 또한 시각적으로 녹시율이 높은 정의읍성 외벽에 자생하는 방가지똥, 약모밀, 주홍서나물, 개망초, 자주광대나물의 제거가 시급하다. 이와 함께 폐 공가에 귀화식물의 분포와 우점도가 높음에 따라 공가에 대한 보존관리 및 민박 활용방안 등을 강구해야 할 것이다.

Effects of Dietary Selenium Supplementation on Growth Performance, Selenium Retention in Tissues and Nutrient Digestibility in Growing-finishing Pigs

  • Tian, J.Z.;Yun, M.S.;Ju, W.S.;Long, H.F.;Kim, J.H.;Kil, D.Y.;Chang, J.S.;Cho, S.B.;Kim, Y.Y.;Han, In K.
    • Asian-Australasian Journal of Animal Sciences
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    • 제19권1호
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    • pp.55-60
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    • 2006
  • This experiment was conducted to investigate the effects of selenium (Se) sources and levels on growth performance, nutrient digestibility and Se retention in growing-finishing pigs. A total of 56 crossbred pigs ([$Landrace{\times}Yorkshire$]${\times}$Large White) with average $28.5{\pm}0.2kg$ BW were allotted to 7 treatments on the basis of sex and weight in two replicates and four pigs per pen. A $2{\times}3$ factorial arrangement of treatments was used in a randomized complete block (RCB) design. Two sources of Se (selenite Se or Se-enriched yeast) were added at 0.1, 0.3 and 0.5 mg/kg to each treatment diet. A basal diet without Se supplementation was the seventh treatment group. Three pigs per treatment were randomly selected and samples of loin, liver, pancreas and a kidney were collected, frozen and later analyzed for Se. The digestibility trial was conducted to evaluate the apparent absorption and retention of Se and availability of other nutrients. Growth performance was not affected by dietary sources and levels of Se. No growth retardation was observed in the 0.5 mg/kg dietary Se treatment group regardless of Se sources. The Se concentration of serum in Se supplemented groups was increased compared with the control group (p<0.01). During the growing and finishing phase, Se in serum was clearly increased when organic Se was provided (p<0.01). Interaction of Se source ${\times}$ Se level was observed in Se concentration of loin, liver and pancreas of the pigs at the end of experiment. Selenium retention in the liver, kidney, pancreas and loin of pigs was increased as dietary Se level increased and was higher when pigs were fed organic Se resulting in an interaction response (p<0.01). Nutrient digestibilities were not affected by dietary Se sources or levels. No dietary Se source ${\times}$ Se level interaction was observed in nutrient digestibility. The results from this experiment indicated that dietary Se sources and levels affected the distribution of Se in the body of growing-finishing pigs. Organic source of Se, such as Se-enriched yeast resulted in higher serum and tissue Se concentration compared to inorganic form, while no beneficial effects on nutrient digestibility were observed from dietary Se supplementation in growing-finishing pigs.

분산전원이 연계된 배전계통의 온라인 보호협조 방안 (The Online Protective Coordination Schemes of the Distribution Systems with Distributed Generation)

  • 최준호;노경수;김재철
    • 조명전기설비학회논문지
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    • 제21권3호
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    • pp.132-141
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    • 2007
  • 최근 경제 발전으로 인한 전력 에너지 소비 증가로 발전선비의 확충이 요구되는 상황이다. 그러나 화석연료고갈 및 지구환경문제로 대형 화력 발전설비의 확충이 어려워지고 있다. 따라서 발전부지 확보가 용이하고 환경오염의 위험이 적은 분산전원에 대한 관심이 한층 더 고조되고 있다. 그러나 이러한 분산전원이 배전계통에 연계되면 전압변동, 고조파, 보호협조, 고장전류 증가 등의 문제를 일으키므로 이에 대한 적절한 연구가 필요하다. 본 논문에서는 국내 22.9[kV] 배전계통에 다수의 분산전원이 연계되었을 경우, 각 계전기가 감지하는 고장전류의 크기와 방향성을 고려하여 고장 감지 및 고장 지점을 확인하는 방법을 제안하였다. 이를 기반으로 하여 배전계통 보호기기인 자동재폐로 차단기-구분개폐기 보호시스템이 상호협조를 이루기 위한 온라인 보호 협조방안을 제시하였다.