• Journal of Biosystems Engineering
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• 제27권5호
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• pp.399-408
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• 2002

The sweet persimmons are producted 227,394 tons per year in Korea. They are preserved at cold storage after wrapping them in packing vinyl to maintain quality. Using conventional handwork, a skillful worker could probably produce only 1,000 packings a day. Hiring many skilled-labors to wrap sweet persimmons in packing vinyl seems to be difficult because of the recent rural crisis. Therefore, it was necessary to be developed for the automated ordering and packing unit that is convenient and laborsaving. This study were summarized as follows : Success rates of 99%, 100%, and 88% were observed for ordering parts, sealing and cutting films, and sealing films in the inlet part, respectively. The time required per 1 cycle was 16 seconds and the developed unit performed 225 cycles an hour. The unit showed an ability of 1,125 pieces per hour. Therefore, the productivity was 10 times greater than that of skillful handwork.

• 한국복식학회:학술대회논문집
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• 한국복식학회 2004년도 International Costume Conference in Association with ICOM 2004 SEOUL
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• pp.94-95
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• 2004

• 한국수학교육학회지시리즈B:순수및응용수학
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• 제1권1호
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• pp.13-18
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• 1994

The study of the integral of the scalar curvature, $A(g)\;=\;{\int}_M\;RdV_9$ as a functional on the set M of all Riemannian metrics of the same total volume on a compact orient able manifold M is now classical, dating back to Hilbert [6] (see also Nagano [8]). Riemannian metric g is a critical point of A(g) if and only if g is an Einstein metric.(omitted)

• Weed & Turfgrass Science
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• 제3권1호
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• pp.6-12
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• 2014

본 조사는 2013년에 경북지역 13개 시 군의 320지점에서 논 잡초 발생 현황을 파악하기 위하여 수행되었다. 경북지역의 논잡초 조사결과, 27개과(family) 51초종(species)이었고 과별로는 벼과(family) 9초종, 사초과(family) 5초종, 마디풀과(family) 4초종, 국화과(family) 4초종 순으로 나타났다. 발생 잡초종의 생활형태는 일년생잡초 34종, 다년생잡초 17종으로 대부분 일년생잡초였다. 경북지역의 우점잡초는 물달개비(10.80%) > 좀개구리밥(10.74%) > 가막사리(8.77%) > 강피(7.17%) > 올챙이고랭이(6.20%) > 올방개(6.13%) > 벗풀(5.85%) 순이었다. 물달개비, 좀개구리밥, 가막사리, 강피, 올챙이고랭이, 올방개, 벗풀의 우점도는 전체 잡초종의 50%이상 차지하였고 TWINSPAN 분석을 통한 지역별 잡초종의 유사성은 여뀌바늘, 올챙이고랭이, 미국외풀, 마디풀, 뚝새풀에 의해 구분되어 추후 경북지역 논 잡초의 발생 양상을 예측하며 잡초군락의 변화를 파악함으로써 체계적인 논 잡초 관리방안을 마련할 수 있을 것으로 판단되었다.

• 한국식품영양과학회지
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• 제35권1호
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• pp.15-20
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• 2006

백운3호, 대엽조생, 수원뽕, 청일뽕, 대축면, 강원3호, 희학, 카타네오, 국상20호 등 9가지 오디를 이용하여 항산화효과와 Helicobacter pylori에 대한 억제효과를 측정하였다. 페놀함량을 측정한 결과 물 추출물에서는 강원3호가 2.90 mg/g으로 다른 시료에 비하여 높게 나왔으며, $40\%$ ethanol 추출물에서도 강원3호가 3.02 mg/g으로 가장 높게 나타났다. 항산화효과 중 DPPH에 대한 전자공여능은 물 추출물에서 강원3호가 $99.54\%$로 가장 높게 나타났으며, $40\%$ ethanol 추출물에서는 대엽조생이 $89.61\%$로 나타났다. ABTS radical decolorlization을 측정한 결과 물 추출물에서는 청일뽕이 $96.14\%$로 가장 높게 나타났으며, $40\%$ ethanol추출물에서는 백운3호가 $99.9\%$로 나타났다. TBARS값은 control값이 $1.56\times10^{-2}{\mu}M$으로 나타났으며, 청일뽕이 물 추출물에서 가장 낮은 $0.86\times10^{-2}{\mu}M$값을, $40\%$ ethanol 추출물에서도 역시 청일뽕에서 $1.03\times10^{-2}{\mu}M$의 TBARS 값을 나타내어 산화촉진인자를 binding하는 능력이 $40\%$ ethanol 추출물보다 물 추출물이 좋은 것으로 나타났다. TBARS와 같이 지용성 물질의 항산화력을 나타내는 antioxidant protection factor에서는 청일뽕이 물 추출물에서 2.25로 나타났으며, $40\%$ ethanol 추출물에서는 대엽조생에서 1.49로 나타났다. 오디 추출물의 Helicobacter pylori에 대한 항균활성은 물 추출물에서 청일뽕과 국상20에서 강한 저해활성이 나타나 천연 항균제 및 생리활성 물질로의 이용가능성을 추측할 수 있었다.

• 한국물환경학회지
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• 제22권2호
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• pp.308-313
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• 2006

Charicteristics of piggery waste and treatment processing sludges for reuse were investigated. If it was thoroughly regulated in disinfectants, antibiotic substances and heavy metals, raw piggery waste can be gratified in criteria for fermentative compost (liquid) for flowers cultivation. Also, Because it is satisfied with various criteria of heavy metals and fertilizer contents for reuse except water content, primary pre-treatment sludge is very good material for composting. If provated goods on heavy metals are used in coagulation & dewatering process, coagulation & dewatering sludges are suitable for criteria of special waste regulation and by-product compost. This study proves that, if they are accomplished with suitable composting and mature process, piggery waste and processing sludges are free from microbiological problems as well as criteria of composting.

• The Journal of Asian Finance, Economics and Business
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• 제7권12호
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• pp.919-926
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• 2020

The purpose of this study is to analyze and test the effect of financial ratios and macroeconomics on Islamic stock returns listed in Jakarta Islamic Index (JII) other than to assess whether investment risk can be an intervening variable in this study. The type of research is explanatory in nature with a quantitative descriptive approach. The data used is based on secondary sources with a sample group of 29 companies listed on JII for a 5-year period ending 31 December 2018. The data obtained were analyzed by using SEM (Structural Equation Model) with AMOS (Analysis Moment of Structural) 21 program. The results of the study show that only financial ratios affect sharia stock returns and investment risk, while the mediation test found that investment risk does not act as a mediating variable between financial ratios and macroeconomics and Islamic stock return. These findings indicate that the role of the company's financial health is very important. Besides affecting the rate of return obtained, the company's financial health can also reflect the level of risk that investors will accept in the future. By improving financial performance properly, a company will have a positive impact on various interested parties and minimize the level of investor losses.

• 한국물환경학회지
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• 제22권4호
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• pp.711-719
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• 2006

The effluent from anaerobic digestion process of slurry-type piggery waste has a characteristic of very low C/N ratio. Because of high nitrogen content, it is necessary to evaluate nitrogen removal alternative rather than conventional nitrification-denitrification scheme. In this study, two parallel treatment schemes of SBR-like partial nitritation reactor coupled with anaerobic ammonium oxidation (ANAMMOX) reactor, and a nitritation reactor followed by nitrite denitrification process were evaluated with a slurry-type piggery waste. The feed to reactors adjusted with various $NH_4-N$ and organics concentration. The nitrite accumulation was successfully accomplished at the loading rate of about $1.0kgNH_4-N/m^3-day$. The $NO_2-N/NH_4-N$ ratio 1~2.6 in nitritated effluent that operated at HRT of 1 day indicated that SBR-like partial nitritation was applicable to ANAMMOX operation. Meanwhile, the nitrite accumulation of 87% was achieved at SBR operated with HRT of 3 days and $0.4mgO_2/L$ for denitritation. Experimental results further suggested that HRT (SRT) and free ammonia(FA) rather than DO are an effective control parameter for nitrite accumulation in piggery waste.

• 한국물환경학회지
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• 제22권4호
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• pp.687-694
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• 2006

Dewatering sludge using inorganic chemicals with polymer has been evaded for reuse on account of the risks of high heavy metals contained and soil acidification. Composting feasibility of coagulation & dewatering sludges produced from livestock waste treatment plant was investigated. The results of analysis prove that dewatering sludge is valuable matter with suitable elements for composting if high quality ferric chloride ($FeCl_3$) is used for coagulation & dewatering process. In pot-cultivation of harvestes, using effects of dewatering sludge improved with lime treatment was very effective. The results of pot-cultivation proved that harms of crops according to different acid tolerances were not detected. But it was not applied to crops with weak acid tolerance or greenhouse for free from gas damage. Also, Further studies and monitorings are necessary to use sludges because results of pot-cultivation were generated differently by characteristics of soil, nutrient demand of plants, mature degree of sludge, consecutive cultivation and etc.

• 한국물환경학회지
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• 제22권2호
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• pp.300-307
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• 2006

The combined SHARON (Single reactor system for High ammonium Removal Over Nitrite)-ANAMMOX (Anaerobic ammonium oxidation) reactor were operated in mesophilic condition ($35^{\circ}C$). In this study, microbial granulation and characteristics of SHARON and ANAMMOX sludges were investigated using settling test, Scanning Electron Microscopy (SEM) and Fluorescence In Situ Hybridization (FISH). In SHARON reactor, Aerobic granulation with diameter of 1.5~2.5 mm was accomplished but aerobic granulation was weaker than anaerobic granular sludge. Initial seed sludge of ANAMMOX reactor was used as attached media for biofilm growth. ANAMMOX sludge was more compact and rounder rather than seed sludge. Though ANAMMOX sludge has high activity, it has lower settling ability than the seed granule. The color of ANAMMOX sludge was changed from dark to redish brown granular with diameter of 1~2 mm. In FISH of ANAMMOX sludge, high fraction of Candidatus B. stuttgartiensis which paid great role of nitrogen conversion was detected. Also, FISH results reveals that ANAMMOX bacteria inhabit at inner parts near surface, having advantages in utilization of substrates and protection from oxygen inhibition.