• Title/Summary/Keyword: alternative park resources

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단층퍼셉트론을 이용한 Thiessen 계수 대안에 관한 연구 (Study on the Alternative of Thiessen Coefficient by One Perceptron Neuron)

  • 박성천;김용구;정천리;문병석
    • 한국수자원학회:학술대회논문집
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    • 한국수자원학회 2004년도 학술발표회
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    • pp.859-862
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    • 2004
  • 유역평균강우량은 강우-유출모형을 통하여 유출량을 산정할 경우에 사용되며, 산정 방법에는 산술평균법, Thiessen 가중법, 등우선법 등이 있으나 일반적으로 Thiessen 가중법을 많이 적용하고 있다. Thiessen 가중법의 유역평균 강우량 산정방법은 각 관측소가 지배하는 면적(지배면적)을 전체면적으로 나누어 가중치(Thiessen계수)를 구한 후 여기에 각 관측소의 강우량을 곱하고 이를 합산함으로써 유역평균 강우량을 산정하는 방법이다. 본 연구에서는 면적비로 구해지는 Thiessen 계수의 대안을 찾기 위해 대상 유역으로는 영산강 1지류인 지석천 유역을 선정하였고, 단층퍼셉트론을 이용하여 동면, 청풍, 능주의 강우자료를 Input, 능주지점의 유출자료를 Output으로 상호 상관분석으로부터 한 개의 유출 사상에 대해 가장 높은 상관계수를 선택하여 Input 자료를 재구성하였다. 재구성 한 자료를 이용하여 훈련시키고 여기서 발생한 가중치를 Thiessen 계수의 대안의 값으로 추천한다.

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Generating global warming scenarios with probability weighted resampling and its implication in precipitation with nonparametric weather generator

  • Lee, Taesam;Park, Taewoong
    • 한국수자원학회:학술대회논문집
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    • 한국수자원학회 2015년도 학술발표회
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    • pp.226-226
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    • 2015
  • The complex climate system regarding human actions is well represented through global climate models (GCMs). The output from GCMs provides useful information about the rate and magnitude of future climate change. Especially, the temperature variable is most reliable among other GCM outputs. However, hydrological variables (e.g. precipitation) from GCM outputs for future climate change contain too high uncertainty to use in practice. Therefore, we propose a method that simulates temperature variable with increasing in a certain level (e.g. 0.5oC or 1.0oC increase) as a global warming scenario from observed data. In addition, a hydrometeorological variable can be simulated employing block-wise sampling technique associated with the temperature simulation. The proposed method was tested for assessing the future change of the seasonal precipitation in South Korea under global warming scenario. The results illustrate that the proposed method is a good alternative to levy the variation of hydrological variables under global warming condition.

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Patient Flow Optimization for Outpatient Department Using Discrete-Event Simulation

  • Dieu, Xuan-Manh;Hoang, Huu-Trung;Kim, Jung Eon;Kim, Hoon;Park, Junseok;Hwang, Won-Joo
    • 한국멀티미디어학회논문지
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    • 제22권7호
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    • pp.804-814
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    • 2019
  • The patient's waiting time and length of stay have been reported as a factor decreasing their satisfaction in the hospital, especially in developing countries. This paper focuses on modeling hospital's outpatient department workflow in a developing country and optimizing the patient waiting time as well as total length of stay. By using discrete-event simulation, many alternative scenarios have raised, such as adding more working time, altering human resources, and adjusting the staff's responsibility, those scenarios will be examined to explore better settings for the hospital. The results show that possible to achieve a 9.6% reduction in patient total length of stay and it could be accomplished without adding more resources to the hospital.

Anti-fibrotic Effects of Saccharomyces cerevisiae Fermented Tenebrio molitor on TGF-β1-stimulated LX-2 Cells.

  • Lim, Hyeon-Ji;Park, In-Sun;Jung, Chan-Hun;Kim, Ji-Young
    • 한국자원식물학회:학술대회논문집
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    • 한국자원식물학회 2019년도 추계학술대회
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    • pp.70-70
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    • 2019
  • Hepatic fibrosis is a common chronic liver diseases, characterized by the excessive deposition of extracellular matrix (ECM). Activation of hepatic stellate cells (HSC) is proliferative and fibrogenic and accumulating ECM. Transforming growth factor $(TGF)-{\beta}1$ is a critical mediator of HSC activation and ECM accumulation leading to fibrosis. Tenebrio molitor (TM), known as yellow mealworms, is reported in many countries as the nutritional value of foods. Our study has aims of finding liver function improvement effect of S. cerevisiae fermented Tenebrio molitor (SCTM) in vitro model. SCTM regulates $TGF-{\beta}1$ induced hepatic fibrosis via regulation of the $TGF-{\beta}1/Smad$ signaling. Also, we compared the components increased by yeast fermentation. It is possible to make a useful insect-derived alternative food in the improvement of hepatic liver disease.

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국내 일본잎갈나무림의 자원량 및 목재생산 잠재량 분석 (Analysis of Forest Resources and Timber Production Potential of Larix kaempferi in South Korea)

  • 김영환;유중원;임종수;이승현;박주원
    • 한국산림과학회지
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    • 제109권4호
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    • pp.454-460
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    • 2020
  • 본 연구는 국내 일본잎갈나무림에서 법적·물리적·환경적·기술적 제약조건을 적용하여 실제 목재생산이 가능한 면적을 산출하고, 이를 대상으로 향후 50년간의 자원량과 목재생산 잠재량을 최적화하였다. 연구결과 전체 일본잎갈나무 면적(259천ha) 가운데 목재생산이 가능한 면적은 124천ha(48%)로 분석되었다. 향후 일본잎갈나무림에 대한 자원조성 및 관리 노력이 뒷받침되지 않을 경우, 안정적 목재생산을 담보하기 어려운 것으로 나타났다. 일본잎갈나무림의 목재생산 잠재량을 확대하기 위해 본 연구에서는 임도를 매년 705 km씩 신설하여 목재생산 가능지역을 확대하는 대안 1과 임도를 매년 1,000 km씩 신설하는 대안 2를 적용하였다. 분석 결과, 대안 1은 목재공급량이 현 수준을 유지하거나 5% 정도 증가할 경우 문제가 없으나, 10% 증가할 경우 임목축적이 정체되는 등 안정적인 목재공급에 한계가 나타났다. 반면 대안 2는 목재공급량이 10% 증가하여도 안정적 목재공급이 가능한 것으로 나타났다. 따라서 국내 일본잎갈나무의 안정적인 목재공급 및 생산 잠재량 확충을 위해서는 임도 확대 및 재조림 노력이 뒤따라야 한다.

Study on the reorganization of the legal system for an integrated forestry business

  • Park, Chang-Won;Lee, Bo-Hwi;Joung, Da-Wou;Park, Bum-Jin;Lee, Joon-Woo;Kim, Se-Bin;Koo, Seung-Mo
    • 농업과학연구
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    • 제46권4호
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    • pp.755-768
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    • 2019
  • The forestry development policies and projects in Korea have been implemented under various related acts. These acts include the Framework Act on the National Land and Framework Act on Forestry enacted by each administration. However, there are some limitations to encourage a variety of mountain villages and forestry development policies due to duplication and overlap between the relevant acts. Nowadays, the fields of local development have evolved and become integrated not only by infrastructures but also in various fields such as multi-functional industries including tourism, green care, cultural welfare, etc. Therefore, the current legal system may not effectively accept and support various mountain village development policies and projects. This study tried to determine the necessity of reorganizing th-e related legal system through a field survey of planners, residents and analysts regarding the correlation between legal systems and projects. For these reasons, this study tried to determine the problems of the current legal system and then, suggested alternative methods related to the legal system for integrated rural development. The scope of the study is as follows: 1) correlation analysis between relevant laws and development projects and 2) field survey to determine the legitimacy and validity for the reorganization of the legal system.

Induced Morphological Changes in Larval Rock Bream, Oplegnathus fasciatus, under Starvation

  • Park, In-Seok;Choi, Hee-Jung;Noh, Choong-Hwan;Myoung, Jung-Goo;Park, Hye Jung;Goo, In Bon
    • 한국발생생물학회지:발생과생식
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    • 제17권4호
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    • pp.399-407
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    • 2013
  • Morphological changes in the reared rock bream, Oplegnathus fasciatus, from hatching to six days after hatching were examined during the early growth stage under starvation. All the larvae died within five days when feeding was delayed for three days after hatching. These results imply that initial larval food should be supplied within two days of hatching. Changes in the pectoral angle and the ratios of eye height to head height, gut height to standard length, and gut height to myotome height in the rock bream are alternative indicators for the identification of starving fish. These indicators might prove useful in evaluating the successful transition from endogenous to exogenous feeding in this species.

Methyl Jasmonate-mediated Enhancement of Phenylethanoid Glycoside in Callus from Abeliophyllum distichum (cultivar Okhwang1)

  • Tae-Won Jang;So-Yeon Han;Da-Yoon Lee;Seo-Yoon Park;Woo-Jin Oh;Jae-Ho Park
    • 한국자원식물학회:학술대회논문집
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    • 한국자원식물학회 2023년도 임시총회 및 춘계학술대회
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    • pp.53-53
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    • 2023
  • Abeliophyllum distichum, one of the Korean endemic plant, is a significant pharmaceutical plant resource. A. distichum with phenylethanoid glycoside can use to regulate the development of cancer, DNA damage with radicals, and the generation of inflammatory mediators. In this study, we investigated whether the biomass, content of phenylethanoid glycoside, and growth rate of callus derived from A. distichum (cultivar Okhwang1, CAD) change in the absence or presence of plant hormones (2,4-Dichlorophenoxyacetic acid; 2, 4-D and 1-Naphthaleneacetic acid; NAA). The results showed that the best biomass, the growth rate of callus, and the contents of phenylethanoid glycoside were cultivated on Murashige and Skoog (MS) growth medium fortified with 1 ppm 2,4-D + 2 ppm NAA after 4 weeks. In a further study, CAD was cultivated on MS growth medium fortified with an elicitor (Methyl Jasmonate, MeJA). The results showed that CAD turned to brown color and fragile form with the elicitor. HPLC-PDA analysis revealed that the contents of phenylethanoid glycoside in the elicitor-treated group were higher than in the elicitor-non-treated group. These results are consistent with the findings of Arano-Varela H et al.,'s study which is that acteoside production can increase after the treatment of MeJA. Therefore, this study can be used to develop an effective and sustainable production of useful substances as an alternative to plant cultivation.

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Puccinia sp.에 의한 이팝나무 잎녹병 발생 및 중간기주 보고 (First Report of Rust Disease on Fringe Tree by Puccinia sp. and Its Alternative Host)

  • 유난희;박애란;윤혁준;손연경;이병희;김진철
    • 식물병연구
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    • 제26권3호
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    • pp.179-182
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    • 2020
  • 2018년 7월 전라남도 강진군의 가로수 전체 이팝나무에 심각한 녹병증상이 발견되어 잎을 채집하였다. 채집한 이팝나무 잎 앞면에서 황색 및 갈색의 병반과 잎 뒷면에서 황색의 녹포자기가 관찰되었고, 현미경아래에서 41.2 ㎛ 크기의 구형 녹포자와 28.84 ㎛ 크기의 구형 하포자가 확인되었다. 이팝나무 녹병균의 부분 small subunit rRNA, internal transcribed spacer (ITS) 1, 5.8S rRNA, ITS2, 부분 large subunit rRNA 염기서열을 이용하여 계통학적 유연관계를 분석한 결과, 대나무 녹병균으로 보고 되어져 있는 Puccinia kusanoi와 가까운 근연관계를 가지고 있었다. 또한 2019년 5월 무위사로 이팝나무 주변에 식재된 대나무에서도 녹병 병징이 관찰되었고, 잎 뒷면에서 동포자퇴와 동포자를 확인하였으며, 대나무에서 채집한 동포자의 염기서열 분석 결과, 이팝나무 녹병균과 100% 일치하였다. 본 논문은 대나무 녹병균으로 알려진 P. kusanoi와 근연관계가 가까운 새로운 종 Puccinia sp. JCK-KCFR1 strain (MT729824)가 국내에서 이팝나무와 대나무를 기주교대하며 녹병을 발생시키는 것을 처음으로 보고한다.

재제조(再製造) 산업(産業)의 활성화(活性化)를 위한 제도(制度)의 기본(基本) 원칙(原則) (Basic Rules for Actualization of Remanufacturing)

  • 목학수;박남규;전창수;송민준;한창효
    • 자원리싸이클링
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    • 제22권3호
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    • pp.81-90
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    • 2013
  • 재제조 산업은 환경을 보존하면서 제조 시 사용되는 자원과 에너지를 줄일 수 있는 대안으로 알려지고 있다. 한국에서 재제조 산업을 활성화 하기 위해선, 원제조업체, 재제조업체 그리고 수리업체 사이의 협력을 지원하기 위해 기본 원칙을 제정하여야 한다. 재제조 활성화를 위한 기본 원칙들은 재제조 절차와 주요 구성원간의 관계분석에 의해 평가될 수 있다.