• Korean Journal of Food Science and Technology
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• v.41 no.1
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• pp.69-76
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• 2009

This study was conducted to evaluate the physicochemical and sensory characteristics of chiffon cakes made with rice flour ranging from 20-100% in place of wheat flour. The water binding capacity of the rice flour was greater than that of the wheat flour and its fat binding capacity was lower than that of the wheat flour. The batter stability data indicated that the 100% treatment was better than the control, and specific gravity values and specific loaf volumes were lower in the samples with added rice flour. Texture analysis found no significant differences in hardness, adhesiveness, cohesiveness, gumminess, and chewiness between the control and the 100% treatment. In the case of crust color, the rice flour-added chiffon cakes did not show any significant differences for their 'a' values. In addition, their crumb color was not significantly different in terms of both their 'L' and 'a' values. According to the sensory evaluation, there was no significant difference in overall acceptability between the control and the rice flour-added chiffon cakes. The highest sensory scores were obtained by the 100% treatment for overall acceptance and moistness. However, flavor, cohesiveness, and brittleness were not significantly different. These study results show that wheat flour could be replaced by rice flour up to 100% in chiffon cake.

• Food Science and Preservation
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• v.30 no.4
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• pp.630-641
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• 2023

The quality characteristics of muffins with different types of rice flour, such as soft flour (CON), soft rice flour (SRF), floury rice flour (FRF), and rice flour (RF) were assessed by using Image J program, which includes their particle size analysis, moisture content, pH, color, specific volume, baking loss rate, texture. (D[4, 3]) is weighted mean diameter, which is directly obtained in particle size measurements showed large values in the order of rice flour, floury rice flour, soft rice flour, and soft flour. The moisture content was high in the CON and SRF groups with small particle sizes. There was no significant difference in pH, L and b value. The a value was significantly low only in the RF group with large particle size. The smaller the particle size, the higher the specific volume and baking loss rate. Image J showed that the number of pores decreased when fewer smaller particles were the powder, but the pores were larger. Among the rice flours, the SRF group, excluding the CON group, scored high in all the acceptability elements. The results from this study can be used as basic data that can contribute to research on various rice-processed foods.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2007.11a
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• pp.176-180
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• 2007

제조산업에 기반을 둔 기업들의 주된 관심사 중에 하나가 바로 비용 절감이다. 비용을 구성하는 요소에는 여러 가지가 있지만 그 중에서도 원자재 구입에 늘어가는 비용은 시장의 상황에 따라 변화하기 때문에 가변적인 요소로써 기업의 실적 및 재무구조에 영향을 주게 되고 이는 해당 기업의 주가에 반영된다. 본 논문에서는 국제 원자재 시장과 주식시장간의 상관관계를 분석하였다. 주식시장에 등록된 기업들을 업종별고 분류하여 각 기업들의 주가 및 업종별 지수와 원자재 가격간의 cross-correlation을 구해보고 원자재 가격이 주식시장에 미치는 영향을 정량적으로 분석하였다. 이러한 연구는 주식시장을 예측하는데 있어서 원자재 시장의 분석이라는 또 하나의 중요한 지침을 마련하고 궁극적으로 불확실한 미래를 대비할 수 있는 Risk management 방안을 마련하는데 도움이 될 것으로 사료된다.

• Proceedings of the Safety Management and Science Conference
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• 2001.11a
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• pp.43-49
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• 2001

최근 기업활동의 자재구매, 제조, 보관 및 운송, 유통/판매까지 포함한 공급체인 전체에 대해 통합관리가 중요한 비스를 받고 싶어한다. 이에 따라 오늘날의 대부분의 기업들은 고도의 기술을 요하는 정보시스템의 도입과, POS, Data Mining 등과 같은 기술들을 이용하고 고객의 요구 사항들을 적시, 적소에서 파악하여 고객이 요구하는 상품과 서비스를 공급하기 위하여 최선과을 정리하고 주요 SCM solution에서 제공하는 기능 및 사용된 방법론을 분석하여, 이를 바탕으로 주문 접수 시 주문물량의 가능납기를 산정하기 위한 입력데이터, 고려요소, 연산절차 등을 포함한 ATI(Available to Promise) 모델을 제제로 부각되고 있다. 현대의 고객들은 제품이나 납기, 품질과 같은 부문에서 높은 서의 노력을 다하고 있다. 최초의 공급자로부터 소비자까지 상품이 전달되는 과정 중에서 재고와 물류비용은 모든 비용의 대부분을 차지하고 있다. 이에 대한 비용을 줄이려고 하는 것이 공급체인관리(SCM)의 기본적인 목적이라 하겠다. 이에 본 논문에서는 공급체인관리(SCM)에 대한 개념과 배경, 필요성 등시한다.

• Electronics and Telecommunications Trends
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• v.23 no.6
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• pp.2-11
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• 2008

태양전지는 태양광을 직접 전기로 변환하는 반도체 소자이다. 태양전지는 효율과 신뢰성이 높은 동시에 저렴한 비용으로 생산할 수 있어야 경제성을 확보할 수 있다. 박막형 태양전지는 제조과정에 에너지가 적게 소요되므로 짧은 기간 내에 투자한 비용과 에너지를 회수할 수 있을 뿐 아니라, 소재 비용도 대폭 줄일 수 있다. 국내에서는 아직 1세대 결정형 실리콘 태양전지 산업이 주류를 이루고 있으며 2세대 기술은 초기 단계에 있으나, 이와 유사한 공정을 사용하는 대면적 디스플레이 생산 설비 및 기술을 기반으로 협력 체제를 구축하여 연구개발을 촉진함으로써 빠른 시일 내에 차세대 태양광 발전 시장에서의 경쟁력을 확보할 수 있을 것으로 기대된다.

• Proceedings of the Korea Information Processing Society Conference
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• 2007.05a
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• pp.155-159
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• 2007

S/W 개발 프로젝트의 품질, 비용, 개발 기간을 잘 관리하여 프로젝트를 성공시키기 위해 PM 은 프로젝트의 종료시점과 예산의 초과를 예측할 수 있어야 한다. PMBOK 의 비용관리의 Earned Value Method 는 프로젝트의 진행에 따른 생산성의 변화와 그에 따른 비용과 일정의 증가 추정에 대한 규칙을 제시한다. 그러나 EVM 은 제조공정에서는 그 효과를 증명하였지만, S/W 프로젝트에서는 적용이 힘들어 잘 활용되고 있지 않다. 이는 사람이 주요 자원인 S/W 프로젝트에서는 Actual Cost 의 측정이 쉽지 않기 때문이다. 따라서 본 논문에서는 S/W 프로젝트 관리에서 Earned Value 의 측정이 쉽지 않아 추정되기 힘든 지연된 종료 시점에 대한 예측을 PMBOK 과 CMMI 에서 제시하는 관리 영역과의 연관성을 활용하고, EVM 을 보완하여 지연에 대한 예측모델을 만들어보고자 한다.

• Applied Chemistry for Engineering
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• v.19 no.6
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• pp.633-639
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• 2008

Polysulfone membranes were prepared via the phase inversion process. Toluene was added as a nonsolvent additive in the casting solution containing a mixture of polysulfone and n-methylpyrrolidone. When prepared via the diffusion-induced process using isopropanol as a precipitation nonsolvent, the solidified membranes revealed a similar asymmetric structure irrespective of the addition of toluene, presenting both a dense skin layer and a sponge-like support layer. The added toluene played a role of enhancing liquid-liquid phase separation of the casting solution, and skin layer thickness of a prepared membrane increased with toluene content in the casting solution. On membrane performance, the solute rejection showed a uniform behavior irrespective of the addition of toluene. However, in spite of the significant increase in dense skin layer thickness, the water permeation through the membrane prepared with 60 wt% toluene revealed five times as much flux, compared with that of the membrane prepared without toluene additive.

• Membrane Journal
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• v.22 no.3
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• pp.178-190
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• 2012

Flat sheet membranes were prepared with polysulfone (PSF) by an immersion precipitation phase inversion method. Membranes were prepared with PSF/N-methylpyrrolidone (NMP)/polyvinylpyrrolidone (PVP)/phosphoric acid casting solution and water coagulant. By using the successive process of the vapor-induced phase inversion (VIPS) followed by the nonsolvent-induced phase inversion (NIPS), the effect of phosphoric acid addition to casting solution on morphology and permeability of membrane was studied. The mean pore size, the porosity, and the water flux of membranes were increased by the addition of small amount of phosphoric acid. Furthermore, the morphology of the prepared membranes were changed from a dense sponge-like structure to highly enhanced asymmetric structure. PSF/NMP/PVP/phosphoric acid/2-butoxyethanol (BE) casting solution were prepared and cast the successive VIPS-NIPS process with same experimental condition. Due to the addition of BE to casting solution, the mean pore size and almost 0.1 ${\mu}m$ and the water flux increased about 10 to 12 $L/cm^2{\cdot}min{\cdot}bar$.

• Journal of Digital Convergence
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• v.11 no.11
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• pp.233-242
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• 2013

Securing the appropriability strategy of R&D funding for technology innovation is very important because R&D needs a lot of time and money. Appropriability means the environmental factors that govern an innovator's ability to capture profits generated by an innovation. Generally appropriability mechanism has five kinds, including patent, secrecy, lead time advantage, complementary sales & service, complementary manufacturing. In this paper, we surveyed domestic software industry professionals about appropriability mechanism strategy, and presented a result of priority of each factor and difference between previous research and this study, using the pair-wise comparison method. The result of study showed that domestic IT manufacturing companies prefer patent better than other appropriability mechanism.

• Membrane Journal
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• v.8 no.4
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• pp.210-219
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• 1998

Sulfonated poly(ether sulfone)(SPES) of various ion exchange capacity (IEC) was prepared by heterogeneous sulfonation with chlorosulfonic acid (CSA) to make hydrophilic ultrafiltration membrane for reducing fouling. The effects of CSA concentration, reaction temperature and reaction time has been investigated. The reaction was effective when the temperature is above 10$\circ$C and the CSA concentration is over 0.05 mol, although polymer chain has been significantly degraded. The substitution of sulfonic acid groups was characterized by FTIR and $^1$H-NMR. Transport properties and fouling test have been conducted to the modified SPES ultrafiltration rnembranrs by heterogeneors method. Membranes were obtained using DCM and PVP as a non-solvent and pore forming agent, respectively. Flux reduced and rejection increased with ion exchange capacity. Finger-like structure was disappeared and the thickness of top layer was increased. Dense membrane by non-solvent DCM and porous membrane by pore forming agent PVP was prepared. Fouling was reduced with increasing ion exchange capacity because of hydrophilicity.