• 한국인쇄학회지
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• 제30권2호
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• pp.59-68
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• 2012

As one of the eletronic device industries has been developed by using a recent printing method, the consumption of Ag paste has been on the rise as well. The printing method has simple processes in comparison with other methods. Also it enables to be large-scaled and to lower price ranges. If UV curing system would be applied to the printing method, energy consumption and dangerousness from curing system can be minimized in a short period of time so that its method can be more eco-friendly. This study conducted an experiment in order to make UV curing Ag paste which is feasible to implement micro patterns with different dispersing agents. The purpose of the study is to analysis the suitable printability for micro pattern and to test dispersibility, hardening properties, conductivity and adhesive stength by measuring viscosity, TI(thixotropy index), G', G", $tan{\delta}$(G"/G') after making paste. We have experimented with four dispersing agents. After We did an analysis of characteristic of rheology, conductivity and adhesive stength, etc, We confirmed that the paste added FP 3060 has excellent dispersibility, conductivity and adhesive stength. If the paste has excellent dispersibility, we will expect that micro pattern is made by that.

• Elastomers and Composites
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• 제54권3호
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• pp.220-224
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• 2019

Herein, three polymer compounds were manufactured using three polymer combination methods, ethylene-vinyl acetate/ethylene-propylene-diene-copolymer (EPDM), ethylene-vinyl acetate (EVA)/polyethylene-A (PE-A; density: 0.870), and ethylene-vinyl acetate (EVA)/polyethylene-B (PE-B; density: 0.885), for making cable sheath for use in the shipping industry. In this study, EVA, EPDM, PE-A, and PE-B were used as matrix polymers, and EVA-grafted maleic anhydride was used as a coupling agent for compounding with various compounds such as a fire retardant, cross-linking agent, filler, and other additives, besides the plasticizer. ${\Delta}T$, Mooney viscosity, and tensile strength increased in order of EPDM < PE-A < PE-B, the probable reason is due to the different crosslinking effect. The three compounds showed similar results for fire resistance and aging resistance after compounding process, but they showed excellent cold resistance owing to the non-polarity of the polymers and sufficient plasticizer content.

• 한국환경과학회지
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• 제27권10호
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• pp.853-863
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• 2018

In order to increase the medicinal herbs efficiency of drug delivery, vesicles contained with medicinal herbs were prepared by phosphatidylcholines and surface active agent. Vesicles loaded with medicinal herbs were characterized by UV-spectroscopy, Zetasizer. The antioxidant activity of vesicles was measured by DPPH assay and ABTS radical scavenging assays. Also, an analysis was conducted to determine the effects of anti-inflammatory of vesicles contained medicinal herbs. In addition, the whitening effects of vesicles contained medicinal herbs extract were studied via tyrosinase inhibition assay. The results of vesicles were as follows. Vesicles appeared an average diameter of approximatively 164-599 nm. All studied vesicles contained with medicinal herbs showed antioxidant, anti-inflammatory and whitening effects in a dose-dependent manner. Therefore, this experiment achieves its purpose of synthesizing of vesicles. In conclusion, we recommended that the vesicles loaded with medicinal herbs have ability for anti-aging materials. Specifically, it will apply to cosmetic ingredients.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2003년도 봄 학술발표회 논문집
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• pp.805-810
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• 2003

It is the real circumstance in the country that not only the data and special books but also people who have an expert knowledge are short of the field of the study about plastic wastes, so that to build the Database carrying out gathering info of that is the present question obviously. The business on recycling plastic, for some reason or other, is one of the best ways as called bright prospect industry to prevent environmental pollution and obtain economical outcome by using limited resources. Plastic wastes with construction industry especially using Polymer may have a good effect on the environment and human beings and have a fine view to produce functional and Eco-friendly concrete as well. In this study, Chemical resistance and Water Absorption test in Polymer concrete using bentonite as a shrinkage control agent was made an experiment by comparing with influence on concrete strength and used to offer some valuable data about Polymer concrete.

• 반도체디스플레이기술학회지
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• 제18권1호
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• pp.42-47
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• 2019

The four different polymer compounds were manufactured to make cable sheath for ship industry. Two kinds of ethylene-vinyl acetate (EVA) were selected as main matrix polymers for compounding with fire retardant, crosslinking agent, filler, plasticizer, and other additives. The properties of the four compounded materials were investigated with the contents of fire retardant, silane coated aluminum hydroxide (S-ATH). Rheology, Mooney viscosity, and tensile strength increased with S-ATH contents by reinforcing effect. With increasing fire retardant amount, fire resistance increased, but cold resistance didn't show an obvious enhancement due to polar effect of vinyl acetate in EVA.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2021년도 추계학술발표대회
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• pp.1105-1108
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• 2021

국내외 IOT 시장의 성장률은 꾸준히 증가할 것으로 예측된다. 특히 스마트 가전 시장 분야의 경우 다른 스마트 홈 분야보다 규모뿐만 아니라 성장률 역시 높은 편에 속한다. 한편 코로나 시대 도래로 인하여 개인의 가정에 머무르는 시간은 많아졌으며 개인의 살균에 대한 관심 역시 높아지게 되었다. 본 논문은 인공지능 자동 살균기를 설계하여 하나의 스마트 가전제품 서비스를 설계하는 솔루션을 제공하고자 한다. 인공지능 이미지 인식 기술을 통해 사용자 활동 패턴을 파악하고 이를 기반으로 살균 시간 도출 및 살균 시간 추천 알고리즘을 통해 사용자 맞춤형 살균 서비스를 제공하며 사용자의 활동 패턴에 맞춤화된 적절한 살균 강도를 결정할 수 있도록 군집화를 통해 살균 강도 결정 서비스도 제공한다.

• 한국지반환경공학회 논문집
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• 제20권5호
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• pp.47-55
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• 2019

본 연구에서는 토양의 종류에 따라 친환경고화재인 E.S.B.(Eco Soil Binder)를 사용하여 혼합토의 강도특성과 활용목적에 따른 흙 포장의 기초자료를 제공하고자 한다. 연구에 사용된 토양은 우리나라 주변에서 흔히 채취되는 화강풍화토로 토질분류법에 의한 SW, SP, SC로 구분된다. 일축압축강도 시험을 위한 공시체는 지름 50mm, 높이 100mm의 크기로 혼합토 중량대비 E.S.B.의 혼합비율을 5%, 10%, 15%, 20%, 25%, 30%로 변화시키고 각 조건에 따라 다짐도를 90%, 100%를 적용하고 재령기간 3, 7, 28일에 따른 일축압축강도 특성을 분석하였다. 또한 흙 포장 기준강도와 일축압축강도의 강도비를 산정하여 최적의 E.S.B.혼합비율을 결정하고 ACI209R의 추정식을 활용한 일축압축강도의 현장 적용성을 평가하였다.

• 한국균학회소식:학술대회논문집
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• 한국균학회 2018년도 춘계학술대회 및 임시총회
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• pp.44-44
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• 2018

Fusarium head blight (FHB) caused by infection with Fusarium graminearum leads to enormous losses to crop growers, and may contaminate grains with a number of Fusarium mycotoxins that pose serious risks to human and animal health. Antagonistic bacteria that are used to prevent FHB offer attractive alternatives or supplements to synthetic fungicides for controlling FHB without the negative effects of chemical management. Out of 500 bacterial strains isolated from soil, Bacillus amyloliquefaciens JCK-12 showed strong antifungal activity and was considered a potential source for control strategies to reduce FHB. B. amyloliquefaciens JCK-12 produces several cyclic lipopeptides (CLPs) including iturin A, fengycin, and surfactin. Iturin A inhibits spore germination of F. graminearum. Fengycin or surfactin alone did not display any inhibitory activity against spore germination at concentrations less than 30 ug/ml, but a mixture of iturin A, fengycin, and surfactin showed a remarkable synergistic inhibitory effect on F. graminearum spore germination. The fermentation broth and formulation of B. amyloliquefaciens JCK-12 strain reduced the disease incidence of FHB in wheat. Furthermore, co-application of B. amyloliquefaciens JCK-12 and chemical fungicides resulted in synergistic in vitro antifungal effects and significant disease control efficacy against FHB under greenhouse and field conditions, suggesting that B. amyloliquefaciens JCK-12 has a strong chemosensitizing effect. The synergistic antifungal effect of B. amyloliquefaciens JCK-12 and chemical fungicides in combination may result from the cell wall damage and altered cell membrane permeability in the phytopathogenic fungi caused by the CLP mixtures and subsequent increased sensitivity of F. graminearum to fungicides. In addition, B. amyloliquefaciens JCK-12 showed the potential to reduce trichothecenes mycotoxin production. The results of this study indicate that B. amyloliquefaciens JCK-12 could be used as an available biocontrol agent or as a chemosensitizer to chemical fungicides for controlling FHB disease and as a strategy for preventing the contamination of harvested crops with mycotoxins.

• 대한토목학회논문집
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• 제41권3호
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• pp.237-246
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• 2021

기후변화로 극한강우에 의해 발생하는 얕은 비탈면 붕괴와 침식으로 토석류 유발이 잦아지고 있다. 앵커나 네일링 공법으로 보강하기 보다는 원지반을 이용하여 식생이 되는 비탈면 보강이 경제적이면서 친환경적인 공법으로 연구되고 있다. 본 연구에서는 충분한 식생이 가능하도록 부엽토와 한약재 찌꺼기를 활용하여 토양개량제를 개발하였다. 그리고 표면침식을 방지하기 위해 첨가제로 마이크로 시멘트와 반수석고 등을 사용하여 전단강도를 증가시켰다. 이러한 주재료와 첨가제 결정은 실내시험을 통하여 강우로 인한 지반 표층의 침식 진행을 확인하여 전단강도의 증가를 확인할 수 있었다. 원지반을 활용하는 토양개량제의 보강은 식생이 가능하고 침식에 대해 저항력이 크게 증가한다. 이러한 보강은 사면 불안정성의 주요 원인인 인장균열 발생을 방지하고 침식에 의한 토석류 유발을 막을 수 있기 때문에 다른 공법들보다 장마철 폭우에 대한 대처방안으로 효율적인 방법이라고 판단된다.

• 한국인터넷방송통신학회논문지
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• 제10권6호
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• pp.169-177
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• 2010

철도는 다양한 분야에서 이용되며, 현재 많은 인원과 물류를 운송할 수 있는 효과적이고 친환경적인 교통수단이다. 근래에 들어 지하철을 비롯한 철도에 사고는 인명피해 및 물적 사고로 대부분 인재에 속하며, 이를 방지하기위한 안전 대책을 강구하는 방안이 추진 중이다. 본 논문에서는 철도 건널목 사고 예방을 위한 시스템의 개발을 목적으로 열차의 상황정보를 기반으로 기본적인 철도 건널목 안전관리시스템의 확장뿐만 아니라, 시스템 측면에서도 유연성을 제공할 수 있는 OSGi 프레임워크 기반 상황인지형 스마트 철도 건널목 안전 관리시스템을 구현하는 것을 목적으로 한다.