• 대한원격탐사학회지
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• 제28권3호
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• pp.267-276
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• 2012

Terminal lakes are widely distributed in the arid and semi-arid Gobi of Mongolia, and serves as important water resource for local people and livestock. However, such lakes are subject to great fluctuations in its size depending on climatic conditions and human water utilization. The Orog Lake is one such example that has shown remarkable fluctuation in recent years. In this study, we investigated the temporal changes of Orog Lake surface area by using 16-day MODIS 250 m NDVI products from 2000 to 2010. The results were compared with climate variability represented by monthly precipitation and temperature. Our results show that the Orog Lake gradually shrank for the period from 2000 to 2010, but with a significant range of seasonal and inter-annual variability. The lake area showed considerable seasonal variations, as it expanded in spring and fall, primarily due to snow melt and summer precipitation, respectively. Extreme drought period from 2000 to 2002 triggered the substantial reduction in lake area, leading to dry-up in year 2005, 2006, 2007, and 2009. After dry-up once occurred in 2005, the lake repeated reappearance and disappearance depending on seasonal and annual precipitation. Our findings implicate that the ground water fluctuated around the lake bottom level since 2005. This suggests the highly vulnerable nature of Orog lake, which greatly depends on future precipitation change.

• 한국콘텐츠학회논문지
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• 제14권5호
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• pp.444-457
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• 2014

수백 년 전부터 농촌마을 주민들이 조성해 온 전통마을숲인 당산숲은 한국을 대표하는 전통 문화경관이며 국가적 문화자산이다. 이제 문화콘텐츠는 지역성과 세계성을 같이 갖추어야 하며, 한국 고유의 글로컬문화콘텐츠 생산이 필요한 시점이다. 문화유산은 진정성 유지와 함께 지속가능한 관리체계를 갖추어야 그 가치를 인정받을 수 있다. 현재 많은 당산숲이 방치되거나 소멸 위기를 맞고 있는 가운데, 청도군 신원리의 4개 자연마을은 당산숲을 보호, 관리하고 있으며 그곳에서 당산제를 지낸다. 이 연구는 신원리 4개 마을의 당산숲 비보숲과 이것에 연결되어 있는 농경지, 하천을 포함하여 '농업경관생태 보전지역'으로 설정함으로써, 제도적 관리체계를 부여하고자 하였다. 이러한 농업경관생태 보전지역은 한국 농촌이 갖고 있는 글로컬문화콘텐츠로서, 국가문화자산인 당산숲의 위상을 제고하고 농촌마을 활력 증진에 기여할 수 있을 것이다.

• Advances in aircraft and spacecraft science
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• 제2권1호
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• pp.95-108
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• 2015

Automatic Dependent Surveillance Broadcast (ADS-B) is quickly being adopted by aviation safety authorities around the world as the standard for aircraft tracking. The technology provides the opportunity for live tracking of aircraft positions within range of an ADS-B receiver stations. Currently these receiver stations are bound by land and local infrastructural constraints. As such there is little to no coverage over oceans and poles, over which many commercial flights routinely travel. A low cost space based ADS-B receiving system is proposed as a constellation of small satellites. The possibility for a link between aircraft and satellite is dependent primarily on proximity. Calculating the likelihood of a link between two moving targets when considering with the non-periodic and non-uniform nature of actual aircraft flight-paths is non-trivial. This analysis of the link likelihood and the performance of the tracking ability of the satellite constellation has been carried out by a direct simulation of satellites and aircraft. Parameters defining the constellation (satellite numbers, orbit size and shape, orbit configuration) were varied between reasonable limits. The recent MH370 disappearance was simulated and potential tracking and coverage was analysed using an example constellation. The trend of more satellites at a higher altitude inclined at 60 degrees was found to be the optimal solution.

• 대한미생물학회지
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• 제12권1호
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• pp.33-49
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• 1977

These studies were carried out to detect the presence of mycotoxin fungi and detoxification of toxins in various kinds of grain and foodstuffs in Korea. The experiments were divided into three parts: mycologic, toxicologic and electron microscopic study. The resuIts were summarized as follows: 1. From the 210 various, samples(local grains, 150 samples; rice-cakes, 50 samples; meju, 10 samples), 1,205 colonies or fungi were isolated. In 1,127 of 1,205 colonies, it was possible to identify 21 genera. Among the identified strains, the predominant genera were Aspergillus sp.(28.5%), Penicillium sp.(27.1%) and Mucor sp.(7.8%). 2. In cytotoxicity test on HeLa cells, 25 strains showed severe toxic effects among the 240 strains of experiments. 3. In histopathologic test on mice, 21 strains showed severe toxic effect to mouse liver cells among the 240 tested strains. 4. In electron microscopic studies of HeLa cells and mouse liver cells from animal which had been treated with crude toxin, the liver cells showed the cytoplasmic change: dillatation or vacuolization of endoplasmic reticulum, swelling of mitochondria and disappearance of mitochondrial cristae, increased number of lipid and glycogen particles. Nucleus and nucelar envelope alterations, were also noted. 5. In the detoxification study with ultraviolet irradiation, 90% of the toxic substances were denatured by the ultraviolet light irradiation for 24 hours. 6. As a mass screening, the cytotoxicity test of HeLa cells and histopathologic study of mice liver cells treated with culture filtrates, employed and feasible to detect mycotoxin producing fungi.

• Asian-Australasian Journal of Animal Sciences
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• 제11권6호
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• pp.685-691
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• 1998

In the first of two experiments, chemical composition (Ash, CP and CF contents), nutritive value (in vitro organic matter disappearance "lVOMD" and energy content "ME") and nitrogen retention of chopped date fronds (CDF) as affected by chemical treatment (CT) and storage duration (SD) were investigated. The experimental design was a completely randomized block, arranged in a $3{\times}4$ factorial, with 3 (CT) and 4 (SD) as the main factors using 2 replications / treatment. Three chemical treatments, were used : Control (With zero or no chemical treatment); treatment with 4% urea solution (w /w) and treatment with 4% urea + Date syrup extract (DS). The 4 (SD) were: Control (immediately after opening - without any storage or zero time storage); one month storage period; two months storage period and three months storage period. Both (CT) and (SD) had significant effects (p < 0.05) on CP and ash contents of the CDF, however there were no significant effects (p > 0.05) due to (CT) and (SD) on CF and nutritive value. High retention value (> 80%) for nitrogen was reported for the treated CDF, immediately after opening the incubated material (zero SD). However, nitrogen retention decreased with increasing (SD) to 67% after one month (SD) but tended to stay at a fairly constant level of 67% until 3 months of storage. In experiment 2, the feeding value of treated CDF was evaluated in comparison to Rhodes grass hay, using growing goats and sheep. A $4{\times}2$ factorial design was used (Four roughage sources were used : Rhodes grass hay, untreated CDF, urea-treated CDF and CDF treated with urea + DS with sheep and goats as two animal species, using three animals / treatment). Untreated CDF had a similar feeding value to Rhodes grass hay. However treatment of CDF with urea alone or with urea + DS depressed animal performance of both goats and sheep, apparently due to depression of feed intake (appetite). Feeding untreated CDF decreased feeding cost by 29% and cost/kg gain by 23%. CDF showed a good potential as a cheap local roughage and emergency feed for ruminants in the Sultanate.

• Journal of Forest and Environmental Science
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• 제25권3호
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• pp.177-185
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• 2009

Dryland species and ecosystems have developed unique strategies to cope with low and sporadic rainfall. They are highly resilient and recover quickly from prevailing disturbances such as fires, herbivore pressure and drought. Dryland people have engineered pastoral and farming systems, which are adapted to these conditions and have sustained the livelihoods of dryland people for centuries. In this article, we present the status of potentials and threats to dryland biodiversity and explore options for its conservation and sustainable use. Findings of the research can be summarized as follows: (i) The ecosystem goods and services are highly valued by the community but mechanism for wise use of the resources has disappeared, (ii) forests are under the ownership of the government but the local community is the realistic custodian of the forests through village leaderships and environmental committees; (iii) the immediate major threat to dryland biodiversity held in the forests appears to be the degradation of ecosystems and habitats caused by new and powerful forces of environmental degradation such as large scale irrigation of rice farms, poverty-induced overexploitation of natural resources, and disappearance and ignorance of traditional institutions for management of dryland biodiversity. These new forms of disturbances often overpower the legendary resilience of dryland ecosystems and constitute potentially serious threats to dryland biodiversity. Forests, wetlands and oases all of which are micro hot spots of dryland biodiversity, appear to be particularly vulnerable hence the need to set up some rules and regulations for sustainable utilization of these resources.

• Radiation Oncology Journal
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• 제38권2호
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• pp.129-137
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• 2020

Purpose: To identify the clinical usefulness of serum M protein and to establish a rationale for regular follow-up with serum protein electrophoresis in solitary plasmacytoma. Materials and Methods: Sixty-nine patients with solitary plasmacytoma and solitary plasmacytoma with minimal marrow involvement according to the International Myeloma Working Group criteria were retrospectively reviewed. Results: At a median follow-up of 6.2 years, 5-year local control (LC), 5-year multiple myeloma-free survival (MMFS), 5-year failure-free survival (FFS), and 5-year overall survival (OS) were 82.6%, 44.1%, 41.8%, and 85.1%, respectively. Among the patients whose initial serum M protein was present or not evaluated, 37.3% of patients showed disappearance of serum M protein after various treatment. MMFS of these patients were comparable to non-secretory plasmacytoma with undetectable levels of M protein, and significantly better than patients with persistent M protein. Increase of serum M protein ≥0.1 g/dL was most predictive of treatment failure with area under the curve of 0.731. Conclusion: Patients who eventually showed persistence of serum M protein after treatment showed worse MMFS and FFS compared to those whose serum M protein disappeared or who had initially non-secretory disease. The increase of serum M protein level ≥0.1 g/dL from current nadir was predictive of treatment failure. Therefore, regular follow-up with serum M protein is highly recommended especially unless the patient had initially non-secretory disease.

• 해양환경안전학회지
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• 제30권4호
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• pp.299-307
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• 2024

연구의 대상지인 어촌은 새로운 소득기반을 창출하고 어촌공동체를 유지하는 방편으로 어촌관광에 주목하게 된다. 이는 어촌공간의 비일상성이 관광의 기능과 부합되면서 새로운 가치가 창출되기 때문인데, 이러한 어촌관광의 중요성에 비해서 관련 정책은 다소 미흡한 실정이다. 따라서 본 연구는 어촌관광에 대한 우리 사회의 관심도를 분석하고, 시대별로 이슈와 정책은 어떻게 변화되는지 분석하고자 한다. 뉴스 분석 시스템인 빅카인즈를 활용하여 국내 언론에서 보도된 어촌관광 관련 기사들을 체계적으로 수집 및 분석하였다. 그 결과 어촌관광에 대한 사회적 관심과 정부의 정책적 지원이 시간이 지남에 따라 증가했음을 확인할 수 있으며, 이는 어촌관광이 지역경제 활성화 및 어촌지역 소멸방지에 기여할 수 있는 중요한 전략임을 시사하는 결과이다.

• 한국기록관리학회지
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• 제24권3호
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• pp.45-63
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• 2024

이 연구는 소멸된 장소의 기록화 방안을 모색하고자 수행되었다. 이론연구를 통해 장소와 장소성의 개념을 정리하고 장소 기록화의 의의를 밝혔다. 장소의 소멸은 기억을 불러일으키는 매개의 소실을 의미한다. 장소 기록화는 공간의 장소성을 기록하는 과정으로 기억매개체의 상실에 대응하고, 공유기억의 부재를 해소하며, 공동체 정체감을 강화하는 중요한 수단이 될 수 있다. 또한, 다양한 기록의 이해당사자들을 기록의 생산주체로 복원하여 관련된 맥락을 풍부하게 기술하는 방법과 도구를 제공하는 아카이빙 방법론이다. 이에 장소 기록화 현황과 장소 기록화 방안 연구를 통하여 기록화 실행 시 주민의 참여, 기록관을 중심으로 한 장소성의 소통과 그 과정의 기록화, 문화예술 통합 프로젝트의 실행을 주요한 방안으로 제시하였다. 이어 증평기록관의 '메리놀병원' 사례를 이 세 가지 방안을 기준으로 설명하여 장소 기록화가 어떠한 과정으로 구현되는지를 설명하였다.

• 유통과학연구
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• 제11권4호
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• pp.23-35
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• 2013

Purpose - This paper attempts to identify the problems and limitations of a market maintenance project conducted according to the 「Special Act for the Development of Traditional Markets and Shopping Street」 and to present a revised direction for the special law and lay the groundwork for market maintenance projects to be promoted smoothly. Research design, data, and methodology - The revised direction for the legislation and the proposal were written based on an investigation of the problems and the legal system, and proposed measures for market maintenance operation and system improvements to derive the improvements needed for market maintenance projects. Results - A market maintenance project has been conducted as a means to reinvigorate traditional markets that are economically depressed, and to revive the local economy. It was largely conducted in the form of reconstruction and redevelopment and represents the interests of landowners and merchants. Thus, it is most likely to contribute to the gradual disappearance of traditional markets. First, as part of a market maintenance project, many companies are building multipurpose buildings or high-rise residential buildings to increase profits. In these high-rise buildings, they can raise rents, which may not be affordable for some existing small businesses. To solve such problems, the large-scale store registration requirement needs to be relaxed or abolished once the market maintenance project is completed. If the large-scale store registration requirement is to be abolished, the term 'large retail store' should be changed in the 「Special Act for the Development of Traditional Markets and Shopping Street」. After registration, the Small and Medium Business Administration should train merchants, offer consultations, and support events, to the extent that the existing traditional market management modernization project permits, and further continue to manage and support its ongoing activities. However, unless large-scale store registration is abolished, adding an exception clause in the special law to relax large-scale store registration criteria, and permitting changes to building use is another option. At the end of a market maintenance project, empty stores should be purchased by the Small and Medium Business Administration, and local government, etc., at the actual construction cost, to utilize them as public rental shopping areas, which in turn may be re-utilized as a temporary market for another market maintenance project. The second problem in market maintenance projects is merchant-protection. Currently, the special law prescribes that a temporary market be created for merchants to conduct business during the rental period of a market maintenance project. Conclusions - In reality, a market maintenance project is conducted usually in big metropolitan cities with 500,000 residents or more. The main building type created under these projects is a multipurpose building. For this reason, it is very difficult to secure a location for a temporary market in the surrounding area of such a project. To solve this problem, this study suggests 'public rental shopping areas' as mentioned above.