• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2001.07a
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• pp.335-338
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• 2001

With the use of the electron microscopy and X-ray phase analysis the regularities of carbon deposit formation in process of methane and propane pyrolysis on the zeolites, Kazakhstan natural clays, chrome and bauxite sludge containing metal oxides of iron subgroup, have been studied. In process of over-carbonization the trivalent iron was reduced to metal form. In addition, the carbon tubes of divers morphology had been impregnated with ultra-dispersed metal particles. The kinetic parameters of carbon formation in process of methane decomposition on the zeolite CoO mixture surface were investigated by method of thermo-gravimetric analysis. The morphology and structure of formed carbon fibrils, with the metal particles fixed at their ends, have been investigated, the formation of branched carbon fibrils pattern, so called octopus, being found.

• Electronics and Telecommunications Trends
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• v.35 no.4
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• pp.81-90
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• 2020

The use of machine learning technologies such as deep and reinforcement learning has proliferated in various domains with the advancement of deep neural network studies. To make the learning successful, both big data acquisition and fast processing are required. However, for some physical world applications such as autonomous drone flight, it is difficult to achieve efficient learning because learning with a premature A.I. is dangerous, cost-ineffective, and time-consuming. To solve these problems, simulation-based approaches can be considered. In this study, we analyze recent trends in drone simulation technologies and compare their features. Subsequently, we introduce Octopus, which is a highly precise and scalable drone simulator being developed by ETRI.

• International Commerce and Information Review
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• v.12 no.4
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• pp.127-149
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• 2010

It is well known that FTA increases consumer welfare. However, it is difficult to analyze consumer welfare effects of FTA for item by item because of the difficulty in data collection. In this respect, this study aims at analyzing the types of increasing consumer welfares with item by item. According to the result of the study, there are five types of consumer welfare increased by FTA, and the items are like below: banana, kiwi, octopus, wine, and etc. However, it is hard for consumer to feel effects of FTA directly for several reasons. The problem of distribution structure of imported goods and, tariff reductions over long period are parts of the reasons to reduce the consumer wealfare effects. And the lack of consumer awareness about imported goods also reduces them. In order to promote FTA more efficiently, this study suggests that the government must improve the problems mentioned because consumer consent is essential element for further FTA promotion.

• Transactions on Electrical and Electronic Materials
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• v.2 no.2
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• pp.5-15
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• 2001

The experiment established optimal conditions for over-carbonization. With the use of the electron microscopy and X-ray phase analysis the regularities of carbon deposit formation in process of methane and propane pyrolysis on the zeolites, Kazakhstan natural clays, chrome and bauxite sludge containing metal oxides of iron subgroup, have been studied. In process of over-carbonization the trivalent iron was reduced to metal form. In addition, the carbon tubes of divers morphology had been impregnated with ultra-dispersed metal particles. The kinetic parameters of carbon formation in process of methane decomposition on the zeolite - CoO mixture surface were investigated by method of thermo-gravimetric analysis. The morphology and structure of formed carbon fibrils, with the metal particles fixed at their ends, have been investigated, the formation of branched carbon fibrils pattern, so called octopus, being found. Also, the walnut shells and grape kernel carbonization, their immobilization by the cells of selective absorption of heavy metal and sulfur dioxide ions have been studied. The example of metal-carbon composites used as adsorbents for wastewater purification, C$_3$- C$_4$ hydrocarbon cracking catalysts and refractory materials with improved properties have been considered.

• Journal of Microbiology and Biotechnology
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• v.14 no.1
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• pp.41-47
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• 2004

This study was performed to investigate the antimicrobial effects of hetero-chitosans and their oligosaccharides on the halophilic bacterium, Vibrio parahaemolyticus. Nine classes of hetero-chitosan oligosaccharides were prepared based on their molecular weights, using an ultrafiltration membrane reactor system with chitosanase and celluase, from partially different deacetylated chitosans, 90%, 75%, and 50% deacetylated chitosan, respectively. Thirty-two strains of V. parahaemolyticus were isolated from various marine organisms such as shellfish, shrimps, octopus, and seabirds. Seventy-five percent deacetylated chitosan showed the highest antimicrobial acitivity. The minimal inhibitory concentration (MIC) was 0.5 mg/ml on 14 strains of V. parahaemolyticus, and MIC of the rest strains (18 strains) was 1.0 mg/ml. In addition, MIC of most hetero-chitosan oligosaccharides was 8.0 mg/ml. The results revealed that the antimicrobial effects of hetero-chitosans and their oligosaccharides against V. parahaemolyticus depend on the degree of deacetylation, their molecular weights, and strains tested.

• Journal of the Korean Society of Food Science and Nutrition
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• v.28 no.1
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• pp.16-21
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• 1999

Taurine content was determined by HPLC equipped with RF detector in commercial milks, meats, edible viscera, ham, sausage, fishes and shellfishes, mollusca and crustacea. Taurine contained 1.06~1.57mg/100g in milks, 37.9~169.8mg/100g in lean meats, 11.3~192.4mg/100g in viscera, 45.0~109.1 mg/100g in ham, 11.7~26.0mg/100g in sausage, 31.6~431.9mg/100g in fishes, 125.9~1078.8mg/100g in shellfishes, 340.2~ 1305.6mg/100g in mollusca and 79.3~316.5mg/100g in crustacea. Webfoot octopus had the highest content of 1,306mg/100g, followed by small ark shell(1,079mg/100g), little neck clam (868mg/100g), hard shelled mussel(852mg/100g) and beka squid(734mg/100g).

• ETRI Journal
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• v.14 no.3
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• pp.16-30
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• 1992

SMX-1 시스팀과 같이 다수의 신호링크들이 운용되면서 신호망의 시험 및 운용이 이루어질 때 부분적인 분석 검증이 아닌 시스팀의 전반적인 검증에서부터 망차원에서의 동작여부를 판단하여 시스팀을 수정, 보완해가야 할 필요성이 있다. 그러나, 범용의 링크상태분석기를 사용하는 것은 한정된(1 또는 2 링크)신호링크만을 제공하기 때문에 다수의 신호링크에 대한 실시간 상태분석을 할 수 없는 점, 이미 정해진 메시지만을 추출/검색할 수 있기때문에 사용자가 원하는 형태의 니모닉 검색/추출이 되지 않는 기능상의 미비점, 다수의 신호링크를 제공하기 위해서 고가의 링크상태 분석기를 여러대 구입하는 것은 중복구매로 인한 예산문제 등 많은 문제점들이 있다. OCTOPUS는 이러한 문제점들을 해결하기위해 제안된 다중링크상태분석기로서, 상태분석시 다수의 신호링크를 제공할 수 있고, 사용자가 원하는 형태의 니모닉 검색/추출이 가능하며, SMX-1 연구결과인 부산물을 이용한다는 측면과, No. 7 레벨2 프로토콜을 이용한 레벨2 비가용원인이유 파악기능제공, 유사한 형태의 HDLC(데이터링크 프로토콜) 처리기능등을 제공할 수 있다는 것이 장점이다. OCTOPUS의 하드웨어는 자체 개발된 SMX-1시스팀의 하드웨어를 사용하며 그위에 링크상태 분석기용 소프트웨어를 탑재하게 된다.

• Journal of Food Hygiene and Safety
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• v.30 no.1
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• pp.43-50
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• 2015

In this study, single PCR and multiplex PCR tests were examined for identification of four types of squid species (giant squid, cuttlefish, octopus, beka squid) purchased from fish market as well as aquatic processed products in Busan. To design the specific primers against each species, the nucleotide sequences of the mitochondrial 16s rRNA gene of Architeuthis dux, Todarodes pacificus, Enteroctopus dofleini, Enteroctopus megalocyathus, Uroteuthis chinensis, Uroteuthis duvauceli, Uroteuthis edulis groups were analyzed for the identification of each species registered in the GeneBank (www.ncbi.nlm.nih.gov) and have been used for comparative analysis. In order to obtain the size variation of amplified fragments on multiplex PCR, we designed KOJ-F, OJ-F, OCT-F, HAN-F, ALLR primers for each species. The optimal PCR conditions and primers were selected for four types of squid species to determine target base sequences in its PCR products. In the case of single PCR, giant squid was only amplified by KOJ-F/ALLR primer; cuttlefish was only amplified by OJ-F/ALLR primer; octopus was only amplified by OCT-F/ALLR primer; and beka squid was only amplified by HAN-F/ALLR primer. For multiplex PCR, the mixture of four kinds of genomic DNA (giant squid, cuttlefish, octopus, beka squid) been prepared as a template and used together with the mixture of KOJ-F/OJ-F/OCT-F/HAN-F/ALLR primers in the reaction. By the multiplex PCR, it is confirmed that four samples are correspond to multiple simultaneous amplicon. Finally, we validated the established methods of multiplex PCR in the aquatic processed products. Although the mitochondrial 16s rRNA primers used in this study was useful as a marker for detection of each species among them, the study indicated that the established multiplex PCR method can be more useful tool for monitoring the processed products.

• Journal of the Korean Society of Food Science and Nutrition
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• v.36 no.5
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• pp.595-602
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• 2007

This study was conducted to investigate on food component characteristics of seafood cooking drips (skipjack tuna cooking drip, octopus cooking drip and oyster cooking drip) as a source of functional seasoning. Heavy metal contents of seafood cooking drips were below food safety level. Among seafood cooking drips concentrated to 5 folds, the crude protein content was the highest (18.1%) in skipjack tuna cooking drip (SCD). The free amino acid content and taste value were higher in SCD than in other seafood cooking drips, and the major free amino acids were glutamic acid and aspartic acid. Total amino acid content of SCD was 16.2 g/100 mL and the major amino acids were glutamic acid (11.9%), proline (9.2%), glycine (9.1%) and histidine (11.5%). SCD in comparison with other seafood cooking drips showed the highest angiotensin I converting enzyme (ACE) inhibitory activity at $IC_{50}$ of 14.1 mg/mL. These results suggested that SCD could be used as a source of functional seasoning.

• Food Science and Preservation
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• v.20 no.3
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• pp.404-418
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• 2013

This study was conducted to investigate changes in the physicochemical properties (proximate compounds, reducing sugar, organic acid, ATP and related compounds, and free amino acid) of beachu kimchi (BK) with octopus, abalone, squid and webfoot octopus added during its storage at $4^{\circ}C$ for 35 days. The crude protein content of the seafood Kimchi, 1.98~3.41%, was higher than that of the BK. The organic acid level did not significantly differ in the four kinds of seafood during their fermentation, and their malate and succinate contents decreased while their lactate content increased. The levels of the ATP and related compound substances of the hypoxanthine contents were high but decreased during their fermentation. However, $3.40{\mu}mol/g$ of IMP was detected in the Kimchi with octopus added; $0.67{\mu}mol/g$ in the Kimchi with abalone added; and $1.80{\mu}mol/g$ in the Kimchi with squid added after they were fermented for 21 days, but the same were not detected in the BK. The taurine and ${\gamma}$-amino-n-butyric acid contents of the free amino acids in the seafood Kimchi were approximately two to 10 times and 1.5 to three times higher than in the BK, respectively.