• 한국어류학회지
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• 제29권1호
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• pp.69-74
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• 2017

본 연구는 우리나라 주요 수산자원 중 하나인 민어의 이석을 이용하여 민어의 연령과 성장을 추정하였다. 연구에 사용된 민어의 이석은 2015년 8월부터 2016년 7월까지 서해 남부 연안에서 안강망으로 어획되어 양육된 것으로 총 339개체 중, 연령사정에 이용된 개체수는 327미였다. 연령은 민어는 불투명대에서 투명대로 이행하는 지점을 윤문으로 간주하였으며, 윤문형성시기는 3~6월(주형성시기 6월), 산란기는 9~10월 (주산란기 9월)로 추정되어 초륜이 형성되기까지의 기간은 0.75년으로 나타났다. 최고 연령은 암컷 11세, 수컷 9세로 추정되었으며, 윤문이 형성될 시기의 평균 전장을 바탕으로 비선형 회귀방법으로 추정한 Von Bertalanffy 성장식은 $L_t=182.4(1-e^{-0.067(t+1.754)})$($R^2=0.96$)이었다.

• 한국환경과학회지
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• 제13권10호
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• pp.883-890
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• 2004

The purpose of this study is to survey and analyze the growth, management and surrounding environment of the big and old trees in Kyoungju-si or the cultural assets alive in our history, and thereby, provide for some data useful to their reasonable protection and use of their surrounding areas. As a result of surveying the growth conditions of the big and old trees, it was found that the height of new grass was 10.5cm on average, the activity scale of the wood was 7.2k$\Omega$, the soil hardness was $16.7kg/cm^2$, the soil acidity was pH 4.8, and the soil moisture was $13.3\%$. Such findings suggest that the soil has been acidified by people's frequent passages, but that the other growth conditions are more or less normal. Hence, it is desirable to secure a sufficient space around the trees or reduce people's stamping pressure with some mechanisms. On the other hand, the visible conditions of the trees were found more or less normal, but many trees remained cut or barked (with some cavities), requiring an optimal treatment or measure. Lastly, as the population has decreased in the suburban traditional villages, the surrounding environment seems to be less vulnerable to people's frequent visits. Nevertheless, in consideration of the fact that there are only a few public space for the villagers, it is deemed necessary to rearrange or maintain some parts of the surrounding environment as public space for villagers or hikers.

• 한국컴퓨터정보학회논문지
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• 제29권4호
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• pp.55-62
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• 2024

본 논문에서는 HMI 디스플레이를 활용하고 IoT 기술을 이용한 박막식 수경 재배 방식의 식물재배기를 제안한다. 기존의 식물재배기는 토양 기반의 재배로 관리가 어렵고, 개방된 재배 환경으로 인해 환경조건 최적화가 어려웠다. 또한 즉각적인 제어가 어려워 식물재배의 성장이 지연되어 식물재배에 대한 문제점이 있다. 이러한 문제를 해결하기 위해, MCU와 센서를 연결하여 재배 환경을 구축하고, HMI 디스플레이와 연동하여 환경정보를 확인하고 빠르게 제어할 수 있게 구현하였다. 또한, 환경정보의 변화를 최소화하기 위해 케이스를 적용하였다. 박막식 수경 재배시스템 구현으로 토양에 관한 관리를 편하게 하였고 동작과 제어를 통해 기능성을 높였으며, 디스플레이를 통해 환경정보를 쉽게 파악할 수 있다. 기존 재배기와 수경재배기에서의 작물 재배 실험으로 성장이 빠른 효과성을 확인하였다. 향후 연구 방향으로는 재배 환경정보 전송 및 저장, 비전 카메라를 활용한 성장 정보를 연동하고 비교하여 생육 정보를 최적화할 것이다. 이를 통해 효율적이고 안정적인 식물재배할 수 있을 것으로 기대한다.

• 한국항행학회논문지
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• 제15권5호
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• pp.795-800
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• 2011

본 논문은 농축산물의 생장환경을 모니터링 하여 농축산물의 생산을 증대시킬 수 있도록 생장환경관리 모니터링 시스템을 설계, 구현에 관한 것이다. IT융합기술을 기반으로 한, 생장환경 모니터링 시스템은 4가지의 구성요소로 이루어져 있다. 환경 인자에 대한 센싱을 담당하는 센서노드, 센서와 통신을 담당하는 싱크노드, 관제 시스템과 연결기능을 수행하는 게이트웨이 및 관제 소프트웨어이다. 이를 통하여 환경인자인 온도 및 습도에 대한 관제과정을 수행하여 각각에 대해서 편차값 10%의 범위를 유지하는 최적의 생장 환경을 유지할 수 있었다.

• Journal of Microbiology and Biotechnology
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• 제23권10호
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• pp.1472-1477
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• 2013

Microalgae have been regarded as a natural resource for sustainable materials and fuels, as well as for removal of nutrients and micropollutants from wastewater, and their interaction with bacteria in wastewater is a critical factor to consider because of the microbial diversity and complexity in a variety of wastewater conditions. Despite their importance, very little is known about the ecological interactions between algae and bacteria in a wastewater environment. In this study, we characterized the wastewater bacterial community in response to the growth of a Selenastrum gracile UTEX 325 population in a real municipal wastewater environment. The Roche 454 GS-FLX Titanium pyrosequencing technique was used for indepth analysis of amplicons of 16S rRNA genes from different conditions in each reactor, with and without the algal population. The algal growth reduced the bacterial diversity and affected the bacterial community structure in the wastewater. The following in-depth analysis of the deep-sequenced amplicons showed that the algal growth selectively stimulated Sphingobacteria class members, especially the Sediminibacterium genus population, in the municipal wastewater environment.

• 품질경영학회지
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• 제38권4호
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• pp.521-530
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• 2010

Global regulatory pressures relating climate change and environmental responsibility are asking companies to find out the best way for sustaining their continuous business growths. It could be known that inadequate management for environmental issues are bad for business, negatively affecting brand image, causing unnecessary losses and costs for environmental preservation. For this reason, environmentally conscious green business growth has been recognized as an essential requirement for a company to stay in business. Many companies are looking for green business opportunities of improving their environmental and financial results, and struggling with how green fits into their business. In this paper, the Green Six Sigma, an environmentally conscious Six Sigma methodology, is presented as a way to find solutions for green growths. The Six Sigma is known as a disciplined, data-driven approach and methodology for achieving world-class performance in any process from manufacturing to transactional. In chronological order, the Six Sigma has been evolved from Motorola's quality-oriented methodology to GE's cost-oriented lean approach, and is being evolved and developed as an environment-oriented green growth approach. There is no doubt that the Green Six Sigma, as an engine of green growth, is a power tool for achieving competitive business performance and reducing the impact on the environment.

• Mycobiology
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• 제37권2호
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• pp.94-102
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• 2009

Ganoderma applanatum is one of the most popular medicinal mushrooms due to the various biologically active components it produces. This study was conducted to obtain basic information regarding the mycelial culture conditions of Ganoderma applanatum. Based on the colony diameter and mycelial density, PDA, YMA and MCM media were suitable for the mycelial growth of the mushroom. The optimum temperature for mycelial growth was found to be $25{\sim}30^{\circ}C$. The optimum carbon and nitrogen sources were mannose and dextrin, respectively, and the optimum C/N ratio was 2 to 10 when 2% glucose was used. Other minor components required for the optimal growth included thiamine-HCl and biotin as vitamins, succinic acid and lactic acid as organic acids, and $MgSO_4$ $7H_2C$, $KH_2PO_4$ and NaCl as mineral salts.

• ALGAE
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• 제21권2호
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• pp.229-234
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• 2006

For the test organism of algal growth potential (AGP), the diatom in the genus Stephanodiscus which cause blooms in the Nakdong River was used instead of generally used strains of Selenastrum, Microcystis, or Anabaena. AGP results indicated that all the samples in the Nakdong River except for that from the Nakdan Bridge site were eutrophic state. Furthermore, the sample from Kumho River site was hypertrophic state. In the main stream Nakdong River, the value of AGP was lowest at the upstream Nakdan Bridge site and was highest at Koryoung Bridge site which is just downstream of Kumho River confluent point indicating the seriousness of pollution contributed by the Kumho River to the Nakdong River. Changes in the concentration of nutrients before and after the AGP tests and inter-relationship among the nutrients indicated that the growth of the Stephanodiscus in the AGP tests were mostly affected by the nitrate, silicate and phosphate. The limiting nutrient was identified by the nutrient addition experiments and the results showed that phosphate was the limiting nutrient for the growth of Stephanodiscus in the tested samples.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2016년도 추계학술대회
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• pp.467-470
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• 2016

이 논문은 농업 비즈니스에서 농산물 생장/유통 환경에서의 센서 정보를 GS1 표준을 통해 운용하는 방법을 다룬다. 농산물 생장/유통 환경 모니터링을 위해 사용되는 센서들의 종류와, 이러한 센서 정보를 운용하기 위한 GS1 표준 식별자, 표준 이벤트의 구조, 생장/유통 환경정보를 저장/공유하는 스키마의 구조를 정의하며, 표준 인터페이스로 정보를 저장,공유 하는 방법을 설명한다.

• 한국물환경학회지
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• 제29권4호
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• pp.551-558
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• 2013

The feasibility of water supply as in-stream flow for Mangwall stream was analyzed in terms of water quality and cultivation periphyton using two different types of water resources (e.g., surface water and bank filtration from Han River basin) and three different types of media (e.g., tile, concrete and pebble). The concentrations of organic and inorganic contaminants from the bank filtration were lower than those from surface water by 17.5 - 55.0%. Using water samples collected from Mangwall stream, surface water, and bank filtration, chlorophyll-a, phaeopigment, and growth rate of periphyton were investigated. During 30 day incubation for each water sample, it was observed that filamentous cyanobacteria, Oscillatoriaceae, accounted for 98%, and water velocity of 5 cm/s was optimum for the in situ filamentous cyanobacteria growth. Also, it was deducted for water velocity and chl-a to have an inverse correlation. Meanwhile, the greater the specific surface area of media, the higher the concentration of chl-a. From these results, both water velocity and specific surface area of media should be considered as an combined parameter to deter the growth of filamentous cyanobacteria.