• 대한화장품학회지
• /
• 제31권2호
• /
• pp.135-140
• /
• 2005

본 연구는 고형상 에멀젼의 표면에서 일어나는 물리적 특성을 레올로지를 이용해 관찰해 보았다. 고형상 에멀젼이 전단변형에 따라 고상에서 액상으로의 전이시 전단속도가 큰 고형상 에멀젼의 경우 낮은 전단변형과 높은 전단변형에서 두 번의 전이구간을 보여주는 반면에 전단속도가 작은 고형상 에멀젼의 경우 높은 전단변형에서 전이구간이 한 번만 나타내는 것을 볼 수 있었다. 이는 고형상 에멀젼의 전단변형에 따른 표면의 물리적 특성이 중요한 요소로서 고형상 에멀젼의 구성요소에 따라 변화하게 된다. 유상과 수상으로 구성되어진 고형상 에멀젼에서 수상의 함량이 증가하게 되면 표면전이(surface transition) 구간이 점점줄어들다가 사라지는 것을 볼 수 있었으며, 유상과 분체로 구성되어진 고형상 에멀젼에서는 분체의 함량이 증가함에 따라 표면전이 구간이 점점 증가하는 것을 볼 수 있었다. 그리고 유상, 수상 그리고 분체로 이루어진 고형상 에멀젼에서는 분체의 함량이 증가함에 따라 표면전이 구간이 점점 줄어들다가 사라지는 것을 볼 수 있었다.

• 한국진공학회:학술대회논문집
• /
• 한국진공학회 2002년도 제23회 학술발표회 초록집
• /
• pp.183-184
• /
• 2002

• 전력전자학회:학술대회논문집
• /
• 전력전자학회 2013년도 전력전자학술대회 논문집
• /
• pp.495-496
• /
• 2013

전력효율을 높일 수 있는 DC 전송이 주요 관심사가 됨에 따라 전력품질에 대한 기술이 요구된다. DC 그리드의 전력품질을 위해서는 반도체 차단기(Solid-State Circuit Breaker : SSCB)는 필수요소이다. 따라서 본 연구에서는 DC 그리드에 적용 가능한 SSCB (Solid-State Circuit Breaker : SSCB)을 제안한다. 제안한 회로는 단락 사고를 모의하고 시뮬레이션과 실험을 통해 시스템의 동작 특성을 검증하였다.

• Journal of Microbiology and Biotechnology
• /
• 제32권3호
• /
• pp.317-323
• /
• 2022

Solid-state fermentation using hulled barley was carried out to produce enzymes and β-glucan. The one-factor-at-a-time experiments were carried out to determine the optimal composition of the basal medium. The modified synthetic medium composition in liquid-state fermentation was determined to be 70 g/l hulled barley, 0 g/l rice bran, 5 g/l soytone, and 6 g/l ascorbic acid. Optimal pretreatment conditions of hulled barley by solid-state fermentation were evaluated in terms of maximum production of fungal biomass, amylase, protease, and β-glucan, which were 1.26 mg/g, 31310.34 U/g, 2614.95 U/g, and 14.6% (w/w), respectively, at 60 min of pretreatment condition. Thus, the solid-state fermentation process was found to enhance the overall fermentation yields of hulled barley to produce high amounts of enzymes and β-glucan.

• 한국전기전자재료학회논문지
• /
• 제17권9호
• /
• pp.930-935
• /
• 2004

$({Li}_{0.5}0{La}_{0.5}){TiO}_3$ (LLTO) solid electrolyte was grown on LiCo{O}_2 (LCO) cathode films deposited on $Pt/Ti{O}-2/Si{O}_2/Si$ substrate using pulsed laser deposition for all-solid-state lithium microbattery. LLTO solid electrolyte exhibits an amorphous phase at various deposition temperatures. LLTO films deposited at 10$0^{\circ}C$ showed a clear interrace without any chemical reaction with LCO, and showed an initial discharge capacity of 50 $\mu$Ah/cm$^2$-$\mu$m and capacity retention of 90 % after 100 cycles with Li anode in 1mol$ LiCl{O}_4$ in propylene carbonate (PC). The increase of capacity retention in LLTO/LCO structure than LCO itself was attributed to the structural stability of LCO cathode films by the stacked LLTO. The cells of LLTO/LCO with LLTO grown at $100^{\circ}C$ showed a good cyclic property of 63.6 % after 300 cycles. An amorphous LLTO solid electrolyte is possible for application to solid electrolyte for all-solid-state lithium microbattery.

• 한국자기학회:학술대회 개요집
• /
• 한국자기학회 2007년도 The 1st International Symposium on Advanced Magnetic Materials
• /
• pp.17.1-17.1
• /
• 2007

• 한국주조공학회지
• /
• 제18권5호
• /
• pp.474-480
• /
• 1998

Microstructural characteristics of semi-solid state processed hypereutectic Al-Si alloys have been investigated. Main concern of the present study is to investigate the effects of P and Sr addition on the size and morphology change of the primary Si particles. Refinement of the primary Si particles was observed with the addition of P and Sr at the early stage of semi-solid state processing, but such a refining effects became negligible resulting in Si particles with a near-spherical morphology with continuous stirring. This implies that the microstructural transformation mechanism became more dependent to stirring effects than to the alloying effects during semi-solid state processing. Brittle fracture and agglomeration were proposed as the mechanisms for microstructural alterations during semi-solid state processing.

• Bulletin of the Korean Chemical Society
• /
• 제31권5호
• /
• pp.1187-1191
• /
• 2010

$^1H-^{15}N$ heteronuclear dipolar coupling solid-state NMR experiments on lipid bilayer or bicelle samples are very useful for the structural studies of membrane proteins. However, to study these biological samples using solid-state NMR, a specific probe with high efficiency and high capability is required. In this paper, we describe the optimized design, construction, and efficiency of a 400 MHz wide-bore $^1H-^{15}N$ solid-state NMR probe with 5-mm solenoidal rf coil for high power, multi-pulse sequence experiments, such as 2D PISEMA or 2D SAMMY.

• 전력전자학회:학술대회논문집
• /
• 전력전자학회 2015년도 전력전자학술대회 논문집
• /
• pp.193-194
• /
• 2015

In this paper, the solid state pulsed power modulator developed in KERI, which is based on IGBT technologies are overviewed. During last ten years, several kinds of solid state modulators were developed in KERI such as IGBT stacks with step up transformer, full IGBT stack based marx generator, modified IGBT marx generator and high repetitive solid state modulator. Basic principle of the design is described and each pros and cons are compared. KERI's solid state pulsed power modulators has lot of advantages for industrial pulsed power application focused on everlasting life cycle and high repetitive, and shows superior arching protection ability.

• 한국자기학회:학술대회 개요집
• /
• 한국자기학회 2008년도 Asian Magnetics Conference
• /
• pp.123.1-123.1
• /
• 2008