• 한국지구과학회지
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• 제41권2호
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• pp.129-136
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• 2020

가뭄은 일반적으로 장기간에 걸쳐 물 공급이 부족하여 나타나는 환경 재앙 중 하나로 대부분 넓은 지역에 걸쳐 나타난다. 원격탐사 자료는 이러한 넓은 지역에서 나타나는 가뭄 모니터링에 적합한 방법이다. 따라서 이 연구에서는 강원도 소양호 지역의 Landsat 위성 영상 자료를 활용하여 약 30년(1985-2015) 동안의 소양호 면적을 산출하고 이를 가뭄 패턴과 분석하였다. 특히 ISODATA, Maximum likelihood 및 인공신경망을 활용하여 Landsat 영상을 분류하여 소양호 면적을 산출하였다. 또한 가뭄 패턴을 분석하기 위하여 산출된 호수 면적과 소양호 지역의 강수량을 활용한 표준강수지수(Standardized Precipitation Index: SPI)와의 상관관계를 분석하였다. 영상 분류 연구 결과, ISODATA, Maximum likelihood 및 인공신경망 방법 중에서 호수 면적 산출의 최적의 방법은 인공신경망 방법임을 알 수 있었다. 또한, 인공신경망 방법을 적용하여 산출한 호수 면적과 SPI와의 상관관계 분석 결과 R² 값이 0.52를 가진다. 즉, SPI지수가 낮을 때 호수 면적이 감소하는 것을 알 수 있었다. 즉 호수 면적 변화를 통하여 소양호 지역의 가뭄 상태 감지 및 모니터링이 가능하다는 것을 알 수 있었다. 이 연구는 향후 지역 가뭄 모니터링 프로그램 개발 등에 사용이 가능할 것이다.

• 한국환경농학회지
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• 제18권4호
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• pp.310-315
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• 1999

본 연구에서는 생물막법의 일종인 흡수성 Biofilter 시스템(ABS)을 설치하여 14개월의 실험기간 동안 건국대 농생대 구내의 염기성 부패조로부터 유입수를 3가지 수리부하율로 처리하여 시험하였다. 모니터링 결과에 의하면 ABS는 평균농도 $BOD_5=6.2mg/l$, TSS=4.4mg/l 이라는 아주 낮은 유기성 유출수를 연속적으로 발생시킬 수 있음이 확인되었다. 이러한 저농도 유출수는 현재 우리나라 오분법의 특정지구(상수원 보호구역)에 대한 방류수 기준($BOD_5=10mg/l$, TSS=10mg/l)에도 훨씬 못 미치는 양호한 농도로서 ABS의 우수한 유기성오수 처리성능이 입증되었다. 특히 유출수내의 TSS 농도가 지극히 낮아서 슬러지의 발생이 거의 없으므로 침전조를 생략할 수 있어 설치비용이 저렴해지고, 유지관리가 단순한 장점을 지니고 있음을 알 수 있었다. 그러나 ABS시설이 농촌에 널리 보급되어 실용적인 시스템이 되기 위해서는 앞으로 T - N과 T- P의 처리효율 향상 방안, 겨울철에 대한 Biofilter탱크내 임계온도 유지문제, 광역모니터링 및 신속보수 유지관리체계 확립에 대한 계속적인 연구가 필요하다. 이러한 문제점만 어느정도 해결된다면 ABS는 우리나라 농촌의 소규모 현장 오수처리시설로서 앞으로 미래가 밝은 차세대형 시스템이 될 것으로 확신한다.

• 복식
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• 제57권2호
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• pp.115-131
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• 2007

By the turn of the century, our society has been gradually more interested in environmental problems than any other time. Ecological change spurred by industrial pollution is occurring beyond the borders of nations, and has emerged as a global issue. Such change is resulting in exhaustion of natural resources and energy, and serious climatic change. In this study, main focus regarding the process of the fashion product design system was placed on the sustainable fashion design of organic cotton as a positive and alternative suggestion. It is expected that the results of this study contribute to the fashion design planning not only for future generation but also for the present time. This study researched on brands that produced their fashion products using organic cotton. The following cases proved to possess sustainability in their product system. The results of this study can be summarized as follows: Firstly, sustainable design in organic cotton products has been a progressive ere-design in 2000s. It is mainly focus concerned with recycling and re-use of materials to protect environment. It is not chemical dependant and takes a particular care in eliminating waste water and energy in the dyeing process. It is an environmentally sustainable design better than all the other design processes. Secondly, it is a design that cares for the common good of society and the global system of fair trading. The fair trading of organic cotton products induced a change in the structure of production system, while defending human rights. It also gave benefits by promoting development in local society and progress in traditional skills. Not to mention that it contributed to building up the concept of transparency in the global economic system. Lastly, the brands emphasize their social responsibility and management ethics to observe environmental policy which is established to protect our nature and people. Their public information reminds customers of the importance of protecting the environment from diverse pollution. Moreover, they hold social events to promote public awareness for environmental Issues. This study dealt only with the organic cotton, a small subset of the subject of sustainable design. It can be extended and applied to various other sustainable fashion design as a solution for global environmental issues.

• 한국식품영양과학회지
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• 제42권8호
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• pp.1190-1196
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• 2013

연구에서는 백삼이나 홍삼의 기억력 개선 효과 연구를 기초로 흑삼의 기억력 개선효과 여부를 판단하고자 scopolamine으로 유도된 시험동물에게 7주간 시료 물질(백삼, WG; 홍삼, RG; 흑삼, BG) 추출액을 투여한 후, 행동학적인 평가 및 뇌 조직 내 malondialdehyde 농도, ChAT 활성 변화를 비교 분석하여 기억력 및 학습능력 손상에 대한 개선효과를 알아보고자 하였다. 수동회피시험에서 BG군과 RG군의 latency time이 scopolamine 투여한 PC군(positive control)에 비해서 유의적으로 길어지는 결과를 나타냈다. 수중미로시험에서도 BG군과 RG군의 scopolamine에 의한 기억 손상이 유의적으로 개선되어 NC군의 escape latency 수준 정도로 낮아짐을 확인할 수 있었다. 또한 probe test에서도 BG군과 RG군에서 장기 기억력 손상이 유의적으로 개선됨이 확인되었다. BG군과 RG군의 뇌조직 ChAT 효소 활성은 PC군에 비해 각각 42%, 71% 수준의 유의성 있는 활성증가를 보였다. 지질 과산화도 malondialdehyde 측정 결과에서 PC군 대비 RG군과 BG군에서 각각 37%, 33% 수준의 유의성 있는 감소를 보였다. 이상의 결과를 요약하면 시험물질 가운데 흑삼의 반복 경구투여는 scopolamine으로 유도된 흰쥐에서 기억력 감퇴를 개선하는 데 가장 효과적인 것으로 사료된다.

• 한국농공학회논문집
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• 제62권1호
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• pp.83-93
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• 2020

East Asia, which includes China, Japan, Korea, and Mongolia, is highly impacted by hydroclimate extremes such drought, flood, and typhoon recent year. In 2017, more than 18.5 million hectares of crops have been damaged in China, and Korea has suffered economic losses as a result of severe drought. Satellite-derived rainfall products are becoming more accurate as space and time resolution become increasingly higher, and provide an alternative means of estimating ground-based rainfall. In this study, we verified the availability of rainfall products by comparing widely used satellite images such as Climate Hazards Groups InfraRed Precipitation with Station (CHIRPS), Global Precipitation Climatology Centre (GPCC), and Precipitation Estimation From Remotely Sensed Information Using Artificial Neural Networks-Climate Data Record (PERSIANN-CDR) with ground stations in East Asia. Also, the satellite-based rainfall products were used to calculate the Standardized Precipitation Index (SPI). The temporal resolution is based on monthly images and compared with the past 30 years data from 1989 to 2018. The comparison between rainfall data based on each satellite image products and the data from weather station-based weather data was shown by the coefficient of determination and showed more than 0.9. Each satellite-based rainfall data was used for each grid and applied to East Asia and South Korea. As a result of SPI analysis, the RMSE values of CHIRPS were 0.57, 0.53 and 0.47, and the MAE values of 0.46, 0.43 and 0.37 were better than other satellite products. This satellite-derived rainfall estimates offers important advantages in terms of spatial coverage, timeliness and cost efficiency compared to analysis for drought assessment with ground stations.

• 한국환경복원기술학회지
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• 제1권1호
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• pp.28-44
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• 1998

This study was conducted to suggest the ecological restoration strategies for the disturbed landscapes by theoretical study. Especially, it is aimed to suggest three objectives for restoration by using native plants ; (1) prevention or reduction of wind and water erosion, (2) provision of food and cover for variety of animal species, (3) improvement of the visual or aesthetic quality of disturbed sites. The main results were summarized as follows. 1. Cooperation between restoration ecologists and restoration practitioners is needed to delineate a scientific approach to restoration ; (1) Being aware of published literature that describes similar work and/or establish general principles. (2) Preparedness to carry out proper experiments to test ideas. (3) Preparedness to monitor fundamental parameters in a restoration scheme. (4) Providing information about the behavior of species. (5) Publish results. 2. There are three models of succession in theories of plant succession. The tolerance and facilitation models were recommended to ecological restoration. The inhibition model applies in most secondary succession, but the actual species which are introduced first may inhibit the germination and growth of slower-growing species, or they may prevent the growth of other species whose propagules arrive later. 3. The objectives of erosion control, wildlife habitat provision, and visual quality improvement are not mutually exclusive. However, many revegetation practices in the past have emphasized one of these aspects at the expense of the others. 4. A native plant community can be the model of ecological restoration. By stylization/abstraction of native plant community, trying to learn the most essential characteristics of community types - environmental factors ; dominant, prevalent, and "visual essence" species composition - in order to use such information in restoration. 5. After developing mass/spaces plan, match plant communities to the mass/space plan. In utilizing community grouping, there needs aesthetic ability to understand design elements. 6. Several hydrophytes such as Pennisetum saccharifluous, Themeda triandra, Cirsium pendulum show relatively good germination rates. In case of mesophytes and xerophytes, Arundinella hina, Artemisia princeps, Oenothera odorata and legumes seem to have quick-germinating abilities at barren sites. Pinus thunbergii, Rhus chinensis, Evodia daniellii, Alnus firma and Albizzia julibrissin can be considered as "late succession" woody plants because they show low germinating rates and slow growing habitat. 7. The seeds used for restoration should be collected within a certain radius of where it will be planted. Consideration in genetic issues in the collection and use of germplasm can increase the odds for successful restoration efforts. 8. The useful model in the "drift" pattern occurs so abundantly in naturally evolving landscapes. As one species diminishes in density, a second or third species are increased. Thus, dynamic interactions between species are created. Careful using of "drift phenomenon" in planting was recommended. 9. Virtually no stand of vegetation today is immune from the introduction and/or spreading of exotic species. Therefore, the perpetuation of a restored sites requires conscious monitoring and management. Thus, management would be the most important process in ecological restoration. 10. In order to keep the sites "natural", alternative management strategies would be applied in management ; Atenative management strategies are decelerating successional process, accelerating successional processes or modifying species composition. As management tools, mechanical, chemical, biological or environmental factor manipulation, e.g., fire could be used.

• 한국구조물진단유지관리공학회 논문집
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• 제24권1호
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• pp.1-7
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• 2020

철강 생산으로 인하여 부산되는 철강슬래그 역시 계속적으로 증가하여 2018년에 2,423 만톤에 이르고 있으나 고로슬래그를 제외한 철강부산물은 단순매립 등으로 재활용되고 있어 산업부산물의 유효활용을 통한 자원순환형 사회 구축 및 천연자원 고갈방지를 위해서는 다양한 활용기술 개발이 절실히 요구되고 있는 실정이다. 한편, 근래 무분별한 해양개발 및 환경오염 등으로 광대한 해양생물의 서식기반이 소실되어 수산자원의 감소현상이 심화되고 있어 이에 대한 대책이 시급한 실정이다. 따라서 본 연구에서는 다량 부산되는 복합슬래그를 천연골재 대체재료로 재활용하는 방안 제시와 해수정화가 가능한 친환경 다공질콘크리트의 배합요인별 공학적 특성 및 적용성 검토연구를 수행하였다. 배합요인별 공극률 시험결과 모든 조건에서 오차범위 2.5%이내의 결과를 나타내었다. 압축강도시험결과 최적 혼입률은 복합슬래그골재 30%, 혼입시 가장 우수한 친환경 다공질콘크리트 제조가 가능하였다. 입상인공Zeolite를 혼입함으로서 침지일수 14일에 총질소 및 총인 농도가 36.8~54.6%까지 감소하여 입상인공제올라이트의 효과를 확인하였다.

• 생명과학회지
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• 제31권10호
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• pp.960-968
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• 2021

미세조류 연구는 18세기 후반부터 시작된 이후 생물산업에서 가장 중요한 생물자원으로 인식되어 왔다. 특히 미세조류의 산업 활용에 초점을 맞춘 식품/사료 및 생리 활성 화합물에 대한 초기 주요 연구 분야는 현재 대체 에너지 자원, 탄소 배출 저감 및 폐수 처리를 포함한 환경 연구 분야로 더욱 확대되고 있다. 하지만 그 산업적 활용의 중요성에도 불구하고 미세조류 배양의 장기 보존과 관련된 기초 연구 분야는 많은 주목을 받지 못하고 있다. 그러나 생물학적으로 활성을 띄는 안정적인 미세조류 배양체 보존은 이러한 미세조류의 산업적 활용을 더욱 부각시킬 수 있는 핵심적인 성공요소이다. 따라서 본 총설은 조류(algae)의 분류체계에서 가장 큰 분류군을 차지하는 녹조류(Chlorophyceae)를 포함하여 현재까지 개발된 다양한 최첨단 미세조류 냉동보존기술을 조사하였다. 또한, 국내 생물자원은행 및 국제 미세조류 자원은행에 기탁된 생물학적으로 활성을 띄는 미세조류 배양체를 보존·유지하기 수행하고 있는 보존 기술과 함께 동결보존 시 온도조절 효과, 보존제 효과 등 미세조류의 성공적인 동결보존 기술과 관련된 주요 요인들을 조사하였다. 본 연구를 통해 확인된 결과를 살펴보면, 미세조류의 형태 및 생리학적 다양성으로 인해 현재로서는 범용적으로 사용할 수 있는 표준 미세조류 장기 보존 방법이 없다는 것을 확인하였다. 따라서, 이러한 문제를 극복하기 위해서는 미세조류의 분류학적 체계를 명확하기 위한 종 특이적 바이오마커의 개발과 종 특이적 동결보존 방법에 기반한 체계적인 접근을 위한 기초 연구 분야에 대해 훨씬 더 많은 노력이 필요함을 확인하였다.

• Animal Bioscience
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• 제35권7호
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• pp.1069-1079
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• 2022

Objective: The objective of this study was to investigate the effect of 4-month intensive feeding on the meat quality, fatty acid profile, flavor, and growth performance of grazing Hulunbuir sheep (HBS). Methods: The HBS were selected 4-months after birth in a pasture rearing system as the experimental animals (n = 44, female, average body weight 23.8±2.2 kg) then divided equally into pasture-based grazing fattening (PAS) and concentrate-included intensive fattening (CON) groups for another 4-month finishing. When finished fattening, all animals were slaughtered to collect musculus longissimus dorsi subcutaneous adipose tissue and to investigate the influences on meat quality, fatty acid profile, flavor and growth performance. Results: The results showed lambs in CON group got significantly higher live weight, hot carcass weight, and dressing percentage. The CON group had significantly higher value of redness (a^*), lightness (L^*) and water holding capacity (p<0.05), significantly lower value of Warner-Bratzler shear force than the PAS group (p<0.05). The subcutaneous fat from CON group lambs demonstrated a significantly higher content of C18:1 and C18:2 (p<0.05), but lower C14:0 and C16:0, indicating an increased degree of unsaturated fatty acid. The content of 4-methyloctanoic acid, 4-ethyloctanoic acid and 4-methylnonanoic acid had increased 2 to 4 times, representing a more intense odor in the CON group. However, the values were still lower than most sheep breeds reported, indicating the indoor feeding system could not fundamentally deteriorate the excellent meat characteristic of HBS. Conclusion: It was evident that lambs in CON group exhibited a better meat production performance, improved in meat color, texture and healthier fatty acid profile through pasture-weaned concentrate included intensive fattening system, which offers a good alternative regimen for lamb finishing and has a wide prospection in the HBS meat industry.

• 농촌계획
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• 제30권1호
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• pp.15-31
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• 2024

The study primarily aims to examine the characteristics of the transition from natural landscape to modern agricultural landscape on the Daesan plain in Dong-myeon, Changwon-si, in the lower reaches of the Nakdong River. The periods covered in the transition include the late Joseon Dynasty, the early Japanese colonial period, and the late Japanese colonial period. The study concluded the following: It was found that the Daesan Plain used to function as a hydrophilic landscape before it formed into a rural landscape. This is characterized by the various water resources in the Plain, primarily by the Nakdong River, with its back marsh tributaries, the Junam Reservoir and Jucheon. To achieve its recent form, the Daesan Plain was subjected to human trial and error. Through installation of irrigation facilities such as embankments and sluices, the irregularly-shaped wetlands were transformed into large-scale farmlands while the same irrigation facilities underwent constant renovation to permanently stabilize the rural landscape. These processes of transformation were similarly a product of typical colonial expropriation. During the Japanese colonial period, Japanese capitalists initiated the construction of private farms which led to the national land development policy by the Governor-General of Korea. These landscape changes are indicative of resource capitalism depicted by the expansion of agricultural production value by the application of resource capital to undeveloped natural space for economic viability. As a result, the hierarchical structure was magnified resulting to the exacerbation of community and economic structural imbalances which presents an alternative yet related perspective to the evolution of landscapes during the Japanese colonial period. In addition, considering Daesan Plain's vulnerability to changing weather conditions, natural processes have also been a factor to its landscape transformation. Such occurrences endanger the sustainability of the area as when floods inundate cultivated lands and render them unstable, endangering residents, as well as the harvests. In conclusion, the Daesan Plain originally took the form of a hydrophilic landscape and started significantly evolving into a rural landscape since the Japanese colonial period. Human-induced land development and geophysical processes significantly impacted this transformation which also exemplifies the several ways of how undeveloped natural landscapes turn into mechanized and capitalized rural landscapes by colonial resource capitalism and development policies.