• 한국표면공학회지
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• 제25권1호
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• pp.24-33
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• 1992

Cr-N films were deposited on low-carbon steel sheets by the reactive arc-induced ion plating (AIIP). The influence of the deposition conditions (nitrogen pressure and substrate bias voltage) on the crystal orientation, morphology and microhardness of the Cr-N films has been investigated using x-ray diffractometer and scanning electron microscope. The impurities and contaminations on the surface and at the interface, and the layer-by-layer compositions of the film have been analyzed using scanning Auger multiprobe (SAM) and glow discharge spectroscope (GDS). The mixed state of Cr and Cr₂N turned out to have a fine fibrous structure. The Cr₂N films were deposited at a wide range of nitrogen flow rates. The orientations of Cr₂N films were mainly (110) and (111), and the intensity of the (111) peak increased as the substrate bias voltage increased. The microstructure of the Cr₂N film was dense and no columnar structure was observed. The films in the mixed state of Cr₂N and CrN were also dense without columnar structure. The maximum microhardness of the Cr-N films was 2400 kg/㎟ at 10 gf load.

• 한국식품영양학회지
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• 제12권4호
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• pp.387-396
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• 1999

Dog meat was begun to be edible by the Chinese, Japanese, the French, Belginan, German Philippines Vietnamese, North-Americans African-Indians Canadian-aborigines Alaskan aborigines including Kor-eans. According to the record, Korea has a long history to have eaten dog meat from the era of Sam-kug(three kingdoms BC 57∼AC 668) and so there are numerous languages proverbs, and customs re-lated to the dog meat. Over the long history there have been many records and recipes about the edib-leness of dog meat. But at present time only the way of cooking such as Bosintang(a soup) Suyuk(a boiled meat) Duruchighi(boiled meat added spice and slightly roasted) Muchim(boiled meat added by spice and mixed) Gaesoju(an extract) Jeongol(boiled meat mixed with spices vegetables and water on the pot) remains. Koreans eat dog meat following the traditional customs n the Boknal(hottest day in summer). Also the areas of Buyo. Sochon, Boryong adn Chongyang of Chungnam province and the ad-jacent areas like Kongju, Iksan, and Nonsan have customs to kill the dog and offer dog meat to the gue-sts in time of small or big occasions such as funeral ceremony Hoigap(anniversary of one's 60th birth-day) and one's birthday. This range of customs is expanding larger and larger. These areas are the cen-ter of past Baekche(BC 57∼AC 660). In spite of this it is unreasonable, and excessive action for foreig-ner to fine fault with the dog meat or Korean food culture.

• 한국산학기술학회논문지
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• 제5권5호
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• pp.458-461
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• 2004

본 논문에서는 Si wafer와 Cu사이의 밀착력을 증가시키기 위해 Si wafer전처리 후 plasma와 SAMs처리 방법에 의한 Cu도금의 형성에 관한 방법을 설명하였다. Si wafer를 Piranha solution과 $0.5{\%}$ HF처리 후 유기박막인 SAMs과 plasma를 이용하는 방법으로 wafer와 Cu층 사이의 밀착력을 증가시켰다. 도금층의 밀착력은 scratch test 로 측정하였으며 , AFM을 이용해 시편에 형성된 패턴의 형태를 관찰하고 SEM과 EDS를 이용해 시편의 조직을 관찰하였다. 그 결과 Si wafer를 $O_{2}, He, SAMs$를 혼합처리 했을 때 밀착성이 가장 우수하였다.

• International Journal of Internet, Broadcasting and Communication
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• 제13권2호
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• pp.82-92
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• 2021

Purpose: It has been reported that the diversity and abundance of microbes in the vagina decrease due to the use of antimicrobial agents, and the high recurrence rate of female vaginitis due to this suggests that a new treatment is needed. Methods: In the experiment, we detected that 10% potassium sorbate solution, 1% eucalyptus oil solution, 1% tea tree oil solution, 400 µL/10 mL grapefruit seed extract solution, 100% lactic acid, 10% acetic acid solution, and 10% lactic acid solution were prepared and used. After adjusting the pH to 4, 5, and 6 with lactic acid and acetic acid in the mixed culture medium, each bacterium was inoculated into the medium and incubated for 72 h at 35℃. Incubate and 0 h each. 24 h. 48 h. The number of bacteria was measured after 72 h. Results: In the mixed culture test between lactic acid bacteria and pathogenic microorganisms, lactic acid bacteria showed good results at pH 5-5.5. Potassium sorbate, which has varying antibacterial activity based on the pH, killed pathogenic bacteria and allowed lactic acid bacteria to survive at pH 5.5. Conclusion: The formulation ratio obtained through this study could be used for the development of a feminine cleanser that can be used as a substitute for antibacterial agents. Further, the findings of this study may be able to solve the problem of antimicrobial resistance in the future.

• Composites Research
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• 제24권2호
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• pp.30-37
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• 2011

에폭시 수지와 유리섬유직물 간의 젖음성을 분석하였다. 에폭시 수지와 산무수물 경화제의 혼합비는 당량비 1:0.5, 1:1, 1:1.2로 하였고, 촉매는 혼합된 수지의 0.lwt%로 첨가하였다. DSC 경화거동분석 결과 이 혼합 수지는 상온에서 함침이 가능하였다. 혼합 수지에 대해 유리평판에 놓여진 유리섬유직물 위에 수지 한 액적(방울)을 투하 후 시간에 따른 접촉각 변화를 측정하였다, 또한, 일정량의 에폭시 수지 액적을 투하시켜 시간에 따른 젖음면적 변화를 측정하였다, 접촉각, 액적높이, 순수 젖음면적, 젖음계수를 측정함으로써 유리섬유직물에 대한 에폭시 수지의 젖음성을 비교 평가하였다. 그 결과 당량비 1:1.2에서 유리섬유직물에 대한 젖음성이 가장 우수하였다.

• 동의생리병리학회지
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• 제22권2호
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• pp.365-370
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• 2008

This study was performed to investigate the influence of extracts from mixed culture with Tricholoma matsutake mycelium and Cordyceps militaris mycelium on hypoglycemia in streptozotocin-induced diabetic rats. Experimental animals were divided into 7 groups : normal control group(NC), diabetes control group (DC), positive control group(PC), non-fermented OCM(oriental medicine & cereal medium) extracts group (UM), crude polysaccharide of non-fermented OCM extracts group (UME), fermented OCM extracts group (UF), crude polysaccharide of fermented OCM extracts group (UFE). NC, DC groups were orally administered saline, PC group was orally administered acarbose. UM, UME, UF, UFE groups were orally administered each extract once a day for 14days. Blood glucose level was lower in the all administering OCM extract groups (UM, UME, UF, UFE) than in the diabetes group(p<0.05), and specially UF, UFE groups were similar to tendency of PC group. ALT, ALP activity in OCM groups were not significantly lowered than PC group(p<0.05). AST activity was not different with PC group. The results of this study show that extracts from mixed culture with Tricholoma matsutake mycelium and Cordyceps militaris mycelium may have a beneficial effect on the hypoglycemia.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2011년도 제41회 하계 정기 학술대회 초록집
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• pp.208-209
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• 2011

In this work, we developed self-assembled monolayers (SAMs) of alkanethiols on gold that can release amine groups, when an electrical potential was applied to the gold. The strategy was based on the introduction of the electroactive carbamate group, which underwent the two-electron oxidation with simultaneous release of the amine molecules, to alkanethiols. The synthesis of the designed thiol compounds was achieved by coupling isocyanate-containing compound with hydroquinone. The electroactive thiols were mixed with hydroxyl-containing alkanethiol [$HS(CH_2)_{11}OH$] to form mixed monolayers, and cyclic votammetry was used for the characterization of the release. The mixed SAMs showed a first oxidation peak at +540 mV (versus Ag/AgCl reference electrode), demonstrating irreversible conversion from carbamate to hydroqinone with simultaneous release of the amine groups. The second and third cycles showed typical reversible redox reaction of hydroquinone and quione: the oxidation and reduction occurred at +290 mV and -110 mV, respectively. The measurement of ToF-SIMS further indicates that electrochemical-assisted chemical reaction successfully released amine groups. This new SAM-based electrochemistry would be applicable for direct release of biologically active molecules that contain amine groups.

• 한국지반신소재학회논문집
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• 제3권1호
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• pp.43-52
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• 2004

단섬유를 혼합한 토사를 뒤채움재료로 사용한 보강토옹벽의 재하하중 단계 및 보강재 포설단수 별 거동특성을 평가하기 위하여 일련의 축소모형실험을 수행하였다. 높이 $100cm{\times}$길이 $140cm{\times}$폭 100cm 인 모형토조를 사용하여 1m 높이의 모형 보강토옹벽을 축조하였다. 본 모형실험에서 보강재로는 최대인장강도 0.79t/m인 지오네트와 최대인장강도 2.26t/m인 지오그리드를 사용하였으며, 화강풍화토에 폴리프로필렌 단섬유를 혼합한 토사를 뒤채움재로 사용하였다. 모형 보강토옹벽 축조후 5단계의 등분포하중($0.5kg/cm^2$, $1.0kg/cm^2$, $1.5kg/cm^2$, $2.0kg/cm^2$, $2.5kg/cm^2$)을 재하하면서 보강재의 인장변형 보강토옹벽 수평변위를 측정하여 하중재하시 모형 보강토옹벽의 거동특성을 평가하였다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 신호처리소사이어티 추계학술대회 논문집
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• pp.401-404
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• 2003

이 논문에서는 이산형 상태공간 모델에 대한 $H_2$, $H_{\infty}$, 및 혼합 $H_{\infty}$ FIR 필터를 선형행렬부등식(LMI)를 이용하여 제안한다. 제안되는 필터는 FIR 구조로서 $H_2$ 및 $H_{\infty}$ 관점에서의 성능기준을 만족함과 더불어 선형성 및 불편향성의 특성을 지니고, 초기 상태에 관한 정보를 필요로 하지 않는다. 그리고 FIR 구조로 인해 기존의 FIR 형태의 필터에 비해 불확실성에 대해 보다 견실하며 빠른 수렴성을 갖는다. 모의 실험을 통해 이러한 장점을 예시한다.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
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• pp.548-551
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• 2004

For the improvements in high transmittance, one of the most important factors of transparent dielectric is pore contents and pore size. This study have investigated the effect of frit size on the transmittance of zinc-boric system with a Pb-free composition. A mixed glass paste was used for thick films, which were made by screen printing methods on a glass substrate (PD200). These dielectric layers were measured for surface roughness, pores content and transmittance. The results show that increase of pore size and content have detrimental effects on the transmittance of films compared to those found in the PbO system.