• 한국수산과학회지
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• 제33권5호
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• pp.418-422
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• 2000

생분해성이며 가식성 어분 단백질 필름을 가공하기 위한 기초 자료로써 명태어분 단백질 필름의 가공조건에 따른 인장강도, 신장률 및 색의 변화를 측정한 결과는 다음과 같다. 명태어분단백질 용액의 캐스팅량이 증가할수록 명태어분단백질 필름의 인장강도와 신장률은 증가하였다 반면 glycerol의 첨가량이 증가하고, 명태어분단백질 용액의 pH가 낮을수록 필름의 인장강도와 신장률은 떨어졌다. 가소제의 종류별에 따른 인장강도는 sorbitol, polyethylene glycol 및 glycerol 첨가 필름의 순으로 높게 나타났으며, 신장률은 polyethylene glycol 첨가 필름이 가장 높았고 sorbitol 및 glycerol 첨가 필름은 서로 비슷하였다. 명태어분단 백질 용액의 농도가 진할수록 필름의 인장강도도 증가하였으나, 신장률은 비슷한 경향을 나타내었다. 상대습도를 달리하여 필름을 저장한 결과 상대습도가 높을수록 인장강도는 감소하였고 신장률은 증가하였다. 가소제의 종류가 필름의 색에 미치는 효과에서 L(밝기)과 b (황객도)는 sorbitol 첨가 필름이 가장 높았고, a (적색도)와 전체적인 색의 차이 (${\delta}E$)는 polyethylene glycol 첨가 필름이 가장 높았다.

• Journal of Information Technology Applications and Management
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• 제31권3호
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• pp.181-192
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• 2024

With the introduction of generative artificial intelligence(AI) tools such as OpenAI's Sora into the global film industry, including Hollywood, there has been a simultaneous emergence of innovations in film production as well as various crises. These changes are spreading throughout the entire film production process, including scriptwriting, casting, editing, and acting. This study analyzes the impact of AI on the film industry, particularly Hollywood, and explores how this technology might bring about changes in Korean cinema. AI technologies applied in the film industry offer benefits such as reducing production time and costs. However, they also pose threats to many filmmakers and actors who rely on the traditional production methods, leading to ethical and legal issues. In Hollywood blockbuster films, AI technology is used to create realistic visual effects, analyze scripts, and suggest optimal shooting angles. While these applications improve the qualitative level of films, they also reduce the human resources required in traditional film production processes. The impact on the Korean film industry is also noteworthy. Some Korean film production companies are leveraging AI to create films in a more creative and efficient manner. Efforts are being made to analyze audience data using AI and develop storylines that appeal to a larger audience. However, these technological changes are controversial among many Korean filmmakers who prefer traditional production methods. This study provides an in-depth discussion on whether the adoption of AI in the film industry can bring about positive innovation or inevitably lead to crises. It analyzes how AI technology is transforming traditional roles in the film industry and what new opportunities and challenges this change generates within the industry. Additionally. This study highlights the differences in technology adoption between Hollywood and Korean film industry and explores how each industry is embracing these technological changes.

• 한국세라믹학회지
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• 제34권10호
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• pp.1083-1091
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• 1997

반응성이 좋은 미분말의 고온 초전도상을 얻고자 액상 합성법 중의 하나인 옥살산염법을 이용하였다. 본 방법을 사용하여 합성 분체의 초기 형상과 입도를 제어하였고, 개선된 균일성을 가진 Bi(Pb)-Sr-Ca-Cu-O 초전도 분말을 제조할 수 있었다. 합성된 산화물 초전도체 분말의 특성 및 pellct으로 성형후 열처리한 시편의 미세구조와 전기적특성을 조사하였다. 또한, Tape casting법에 의해 후막을 제작하여 미세구조와 전기적 특성을 관찰하였다. 합성된 분말의 입자 크기는 100~300nm 이하의 구형이었으나 대부분이 1~3 ${\mu}{\textrm}{m}$ 크기로 응집되어 있었다. 84$0^{\circ}C$로 72시간 동안 열처리한 괴상 시편의 임계저항온도는 110K였으며, 열처리한 후막의 임계전류는 각각 0.6A, 1.9A였다.

• Corrosion Science and Technology
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• 제11권6호
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• pp.280-285
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• 2012

Aluminum is on active metal, but it is well known that its oxide film plays a role as protective barrier which is comparatively stable in air and neutral aqueous solution. Thus, aluminum alloys have been widely applied in architectural trim, cold & hot-water storage vessels and piping etc., furthermore, the aluminum alloy of AC8A have been widely used in mold casting material of engine piston because of its properties of temperature and wear resistance. In recent years, the oil price is getting higher and higher, thus the using of low quality oil has been significantly increased in engines of ship and vehicle. Therefore it is considered that evaluation of corrosion resistance as well as wear resistance of AC8A material is also important to improve its property and prolong its lifetime. In this study, the effect of solution and tempering heat treatment to corrosion and wear resistance is investigated with electrochemical method and measurement of hardness. The hardness decreased with solution heat treatment compared to mold casting condition, but its value increased with tempering heat treatment and exhibited the highest value of hardness with tempering heat treatment temperature at $190^{\circ}C$ for 24hrs. Furthermore, corrosion resistance increased with decreasing of the hardness, and decreased with increasing of the hardness reversely. As a result, it is suggested that the optimum heat treatment to improve both corrosion and wear resistance is tempering heat treatment temperature at $190^{\circ}C$ for 16hrs.

• 대한금속재료학회지
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• 제46권6호
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• pp.329-337
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• 2008

During the continuous casting of boron-bearing steel, the corner cracks on the slab are formed by deformation with low strain rate and rapid cooling at the unbending temperature within the range of 800- $1000^{\circ}C$. Especially, the rapid cooling in the corner of slab during the continuous casting leads to as corner cracking. Therefore, in this study, the hot tensile tests applied to the different cooling rates were taken into account in order to study the effect of cooling rate on the hot ductility of boron-bearing steel. The results revealed that increasing cooling rate deteriorate the hot ductility of boron- bearing steel. Rapid decreasing of the hot ductility is caused by formation of a film-like ferrite and precipitate at the austenite grain boundaries. The morphology of the precipitates in the boron-bearing steel was monitored by PTA (Particle Tracking Autoradiography) and TEM, we observed MnS and BN compound and their morphology was quite different depending on the cooling rates. When the cooling rate is increased, rodshape MnS and BN precipitates can be formed along the austenite grain boundaries. It can cause that weakening the boundary region and decreasing the hot ductility of boron-bearing steel.

• 한국염색가공학회지
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• 제15권1호
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• pp.39-47
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• 2003

Phosphorescent PET/liquid color films and phosphorescent PET/disperse dyes films were prepared by melt casting method using Hot press. Then, weight ratios and exhaustion percent of films were 0.7, 1.2, 1.5, 2.0, and 2.3 wt.%. The effects of L/C and D/D contents(wt.%) of films on the thermal properties, crystal structure, H(%), brightness$(mcd/mm^2)$, morphology, and tensile properties were investigated by means of DSC and WAXD, etc. It was found that the melting temperature and crystalline diffraction peaks were not changes with increasing the liquid color contents and disperse dyes exhaustion. Also, in case of using liquid color to phosphorescent PET film, the H(%) and brightness$(mcd/mm^2)$ value were superior to phos.PET/disperse dyes film. The tensile strength and the tensile modulus were decreased with increasing the contents of liquid color and exhaustion of disperse dyes in the phosphorescent PET film. Also, the elongation at break was increased with increasing the contents of liquid color and exhaustion of disperse dyes in the phosphorescent PET film.

• 한국산학기술학회논문지
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• 제6권6호
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• pp.497-501
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• 2005

Dry film 공정에 의해 PDP(Plasma Display Panel)용 무연 투명유전체를 제조하였다. 여러 슬러리 조성으로부터 고밀도 green sheet를 제조하는데 최적의 조성을 선정하였다. 한편, 슬러리는 양질의 green sheet를 제작하는데 적합한 shear thinning 특성을 나타냈다. 제조한 투명유전체의 열팽창계수는 유리기판인 PD-200과 유사한 $97{\times}10^{-7}/^{\circ}C$로 측정되었다. PD-200에 접합된 투명유전체의 단면 주사현미경 관찰로부터 두 층은 갭이 없이 매우 견실히 접합되어 있음을 확인할 수 있었다.

• 한국전기전자재료학회논문지
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• 제29권8호
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• pp.476-482
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• 2016

Convectional PZT based piezoelectric ceramics have to sinter at high temperature about $1,200^{\circ}C$ for their suitable electrical properties. However, some issues: low temperature sintering piezoelectric ceramic composition and reliable internal electrode, have recently attracted a great deal of interest as a highly efficient multi-layered piezoelectric ceramics. In order to optimize low temperature sintering conditions of thick-film PMN-PZ-PT ceramic, it was investigated sintering and piezoelectric properties according to the change of $LiBiO_2$ contents. Thus, the superior piezoelectric properties were found at the pallet type PMN-PZ-PT optimized with low sintering processing at $925^{\circ}C$ including 7 wt% $LiBiO_2$ sintering aid. Consequentially, we successfully manufactured thick-film PMN-PZ-PT ceramics, which had superior piezoelectric and dielectric properties, with 5 wt% of $LiBiO_2$ sintering aid at temperature of $900^{\circ}C$.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 추계학술대회 논문집 전기물성,응용부문
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• pp.93-94
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• 2006

In this research, the enhancement of electron-transfer activity of hemoglobin (Hb) in dodecanoic acid film was investigated for the first time. This type of composite film was made on glassy carbon electrode by casting method. Cyclic voltammetric result of the modified electrode displays a well defined redox peaks which was attributed to the direct electrochemical response of Rb. Our results illustrate that Rb exchange electrons directly with electrode and exhibits the characteristics of peroxidase. When we apply this modified electrode as a biosensor, it gives excellent performances in the electrocatalytic reduction of hydrogen peroxide ($H_{2}O_{2}$). Through the optimal conditions, the proposed biosensor shows the linear range for H2O2 determination was from $1{\times}10^{-5}$ to $1.25{\times}10^{-4}mol/L$ with a detection limit of $1{\times}10^{-7}mol/L$. The biosensor retained more than 90% of the initial response after 14 days.

• Macromolecular Research
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• 제14권3호
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• pp.267-271
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• 2006

Polyelectrolyte complex films were prepared with two compounds, chitosan and poly(ethylene glycol)-monosuccinate, using a casting in order to synthesize a polyelectrolyte complex film with various mole ratios of chitosan and poly(ethylene glycol)-monosuccinate. The solution properties of isolated PEC were investigated for the effects of FTIR, pH value, Brookfield viscosity and cell viability assay using MTT staining. The PEC films were evaluated for mechanical properties by typical stress-strain curve, far thermal properties by DSC and TGA and for surface morphology Properties by SEM. Furthermore, the surface resistance, moisture regain and water content of the films were characterized. The solution properties were affected by several factors including the chitosan content in the PEC, the mixing ratio of PEG and chitosan, and pH. Several PEC in acidic conditions exhibited film formation under appropriate conditions of mixing ratio and chitosan concentration in the mixing process. These PEC films were found to have sufficiently flexible and stable properties due to their hydrophilic structure, which was farmed by the oppositely charged interaction between PEG-MS and chitosan matrix. The results showed the potential applicability of chitosan and poly(ethylene glycol)-monosuccinate films as a biocompatible polymer.