• 폴리머
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• 제39권2호
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• pp.268-274
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• 2015

In this paper, the isothermal crystallization kinetics of a functional PP (FPP) with different grafting yields (GY)-methacryloxyethyltrimethyl ammonium chloride (DMC) grafted PP were investigated by differential scanning calorimetry (DSC). The results showed that the crystallization rate of FPP (GY=4.83%) was the highest for all of the studied samples. Furthermore, for the FPP with different GY, the value of $t_{1/2}$ became longer with increasing the grafting yield (GY). The possible explanation was that the quaternary ammonium groups introduced affected the crystallization process of the FPP in two opposite directions, i.e. promoting the nucleation and hindering the transport of the chain molecules towards the growing nuclei. Polarized optical micrographs showed that the DMC chains acted as nucleating agents, which accelerated the nucleation. In addition, the results showed the FPP had lower nucleation free energy than the PP. This study would be useful for designing the processing parameters of the grafted samples.

• Asia pacific journal of information systems
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• 제8권2호
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• pp.69-83
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• 1998

Some simulation tools have been developed to support business process reengineering. These tools can be used to not only analyze an as-is model of the existing process but also assess the potential value and feasibility of to-be models. But most of them are restricted to analyzing and redesign of the workflow only. Little attention is paid to the organization of people and their roles. This paper Presents a new methodology for business process simulation modeling and analysis. The methodology is based on the concepts of roles and customer-supplier chains. So the proposed methodology allows for tracking people and their roles affected by reengineering the business process. It enables one to analyze and evaluate not only workflow, but roles that are part of the flow. This paper developed a simulator to systematically construct simulation models and conduct simulations easily and efficiently. A case study is also presented as an illustrative example.

• 한국시뮬레이션학회논문지
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• 제10권2호
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• pp.75-89
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• 2001

Many simulation models have been built to facilitate simulation technique in designing, evaluating, and optimizing supply chains. Simulation is preferred to deal with stochastic natures existing in the supply chain. Moreover simulation has a capability to find local optimum value within each component through entire supply chain. Most of supply chain simulation models have been developed on the basis of discrete-event simulation. Since supply chain systems are neither completely discrete nor continuous, the need of constructing a model with aspects of both discrete-event and continuous simulation is provoked, resulting in a combined discrete-continuous simulation. In this paper, an architecture of combined modeling for supply chain simulation is proposed, which includes the equation of continuous portion in supply chain and how these equations are used in the supply chain simulation models. A simple example of supply chain model dealing with the strategic level of supply chain presented in this paper shows the possibility and the prospect of this approach.

• 한국식품저장유통학회지
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• 제15권5호
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• pp.617-621
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• 2008

Sequential passes through $Sephadex^{TM}$ columns were used to select phages that displays ligands for dextran ($\alpha$-1,6 linked linear chains) from a phage antibody library. Those phages that bound to the $Sephadex^{TM}$ in each iteration were replicated in E. coli. A phage preparation isolated on the third round selection produced 5.4 nephelos turbidity units (NTU) in a dextran specific immunonephelometric assay, a 2.2 fold higher value than the phage preparation from the first round selection. This phage gave $72\;{\pm}\;10$ normalized intensity (N.I.) in a dip-stick assay against high molecular size dextran (T2000, $2\;{\times}\;10^6) and significantly lower color ($30\;{\pm}\;6$ N.I.) against low molecular size dextran (T10, $10^4$). The presence of an Fab insert in each of these phages was confirmed using a $\beta-galactosidase linked assay and polymerase chain reaction.

• 산업융합연구
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• 제19권6호
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• pp.1-10
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• 2021

본 연구는 글로벌 공급망 변화로 인해 국내외 기업의 투자유치를 통한 지역경제 활성화가 긴요한 시점에서 충청북도를 중심으로 공공외교를 활용한 지방정부의 경쟁력 강화 방안을 모색했다. 최근 글로벌 비즈니스 환경에서 나타나고 있는 주요 이슈를 정리하면, 글로벌 가치사슬의 지역화 강화, 리쇼어링 현상과 공급망 다변화, 디지털 전환을 통한 효율적인 글로벌 가치사슬 창출 등이다. 따라서 본 연구는 이러한 변화를 바탕으로 공공외교 전략의 필요성을 강조하고 SWOT 분석을 통해 충북의 대응 여건 및 세부 전략을 도출했다. 또한, 이를 종합하여 ABCD 모델을 기반으로 충북형 공공외교 전략을 수립하고, 충북의 경쟁력을 한 단계 업그레이드하기 위한 전략적 시사점을 제시했다.

• Applied Biological Chemistry
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• 제36권6호
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• pp.517-524
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• 1993

글루텔린은 쌀 종자단백질의 80% 수준에 이르는 산 또는 알칼리에 용해되는 가장 중요한 저장 단백질로, 분자량은 54 kDa 내외이며 22 kDa의 산성사슬과 32kd의 염기성사슬로 구성되어 있다. 지금까지 보고된 13개의 글루텔린 유전자의 염기서열로부터 유추된 단백질 서열의 다중분석에 의하여 계통발생적으로 1군에서 5군까지 5개군으로 나눌 수 있다. 각 군 상호유전자간의 염기서열과 아미노산서열의 유사성은 60%에서 90%에 이르어 이들 각 군은 매우 유사한 아미노산 조성을 보여주고 있다. 그러나 lysine 함량에 있어서는 2.5%에서 3.6%로 약간의 변화를 보여주고 있는데, 이는 argnine이 point mutation에 의하여 lysine으로 변화된 결과임을 알 수 있었다. 각 군에서의 성숙단백질과 염기성 사슬의 등전점은 각각 9.0, 10.0 내외로 매우 유사한 반면, 산성사슬은 각각 6.6, 6.7, 7.2, 8.4, 7.9의 독특한 값을 가지고 있다. 아울러 유전자 암호에서 세번째 염기가 G와 C로 끝나는 암호의 비율(fraction of G+C at synonimous site in codons: GC3s)과 유효 암호수(effective codon number, Nc), 우선 암호수(Preferred codon number)의 분석과 상관그래프는 글루텔린 유전자들의 전이효율의 차이는 거의 없어 유사한 수준으로 발현될 가능성을 제시하고 있다.

• Asian-Australasian Journal of Animal Sciences
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• 제30권11호
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• pp.1651-1659
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• 2017

Objective: Lao PDR's recent accession to the World Trade Organization necessitates a greater understanding of the patterns and risk of livestock production in order to better align national policy with the Agreement on the Application of Sanitary and Phytosanitary Measures. This eco-health study was conducted to improve understanding of the interrelations between market chains and zoonotic infection risks at two strategic cross border points between Lao PDR, Thailand and Viet Nam. Methods: Information gained from smallholder farmer/trader interviews was integrated with serological surveys for pig-associated zoonoses-including hepatitis E virus (HEV), Taenia solium (T. solium) and trichinella-to identify potential linkages between disease risk and pig production and slaughter in low input systems common across the country. Results: Trichinella and HEV exposure was high in both humans and pigs in both study areas, significantly associated with pig slaughter and the subsequent consumption and handling of raw pork products. T. solium demonstrated a strong geographical and ethnic association with the northern study area bordering Vietnam. With the right knowledge and accessible, affordable inputs, the majority of smallholder farmers indicated a willingness to invest more in pig production, which could simultaneously improve livelihoods and decrease exposure to HEV, Trichinella, and T. solium through increased access to formal markets and an improved slaughter processes. Conclusion: The linkages identified when assessing disease risk in the context of potential economic and cultural drivers of transmission highlight the importance of a systems-based approach for the detection and control of zoonotic disease, and contributes to an improved understanding of the Lao PDR livestock sector.

• 한국컴퓨터정보학회논문지
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• 제20권1호
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• pp.93-101
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• 2015

현대 사회는 다양한 범죄가 발생하고 있다. 범죄를 예방하기 위해서는 범죄를 예측 하는 것이 필요하고, 범죄 예측에 관한 다양한 연구가 진행 중에 있다. 범죄 관련 데이터는 검찰청에서 1년에 한번 통계처리를 하여 발표하고 있다. 그러나 통계처리 된 자료는 현재 시점을 기준으로 약 2년 전의 자료로 현재 발생하는 범죄에 대한 데이터로 적합하지 않다. 본 논문은 범죄를 예측하는 데이터로 네이버 트랜드를 적용했다. 네이버 트랜드의 웹 검색 트래픽을 이용하면, 현재 발생하는 범죄에 대한 관심도 데이터를 얻을 수 있다. 네이버 웹 검색 트래픽 데이터를 이용하여 범죄를 예측할 수 있는 모델링을 구성하였고, 예측 이론으로 마코프 체인을 적용하였다. 다양한 범죄 중 살인, 방화, 강간을 대상으로 예측 모델링에 적용하였고, 결과 값을 분석하였다. 그 결과 실제 발생한 범죄 발생 빈도수를 기준으로 20%이내의 유사한 결과를 얻었다. 향후에는 계절의 특성을 고려한 범죄 예측 모델링에 대한 연구를 진행할 예정이다

• 신재생에너지
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• 제8권2호
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• pp.33-43
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• 2012

Why solar companies preferred vertical integration of whole value chain? Major solar companies have built internally strong vertical integration of entire PV value chain. We raise a question whether such integration increases the corporate value and whether market situation affects the result. To test these questions, we conducted multi-variant analysis where characteristic factors mainly affect the corporate value measured in terms of Tobin'Q, based on the financial and non-financial data of PV companies listed in US stock market between 2005 and 2010. We hypothesize that since integration increases the overall efficiency but decreases the flexibility to adjust to various market situation, the combined effect of the efficiency gain and the flexibility loss ultimately determines the sign of integration effect on the corporate vale. We infer that the combined effect will be influenced heavily by business cycle, as in boom market (Seller's market) the efficiency gain may be larger than the flexibility loss and vice versa in bust market. We test whether the sign of combined effect changes after the year of 2009 and which factors influence most the sign. Year of 2009 is known as the year when market shifted from Seller's to Buyer's market. We show that 1) integration increases corporate value in general but after 2009 integration significantly decreases the value, 2) the ratios such as Production/Total Cost, Cash turnover period chosen for reversal of the flexibility measure are negatively affect Tobin's Q and especially stronger after 2009. This shows the flexibility improves corporate value and stronger in the recess period (Buyer's market). These results imply that solar company should set up integration strategy considering the tradeoff between efficiency and flexibility and the impact of the business cycle on both factors. Strategy only based on the price competitiveness determined in boom time can bring undesirable outcomes to the company. In addition, Strategic alliances in some value chains as a flexible bondage should be taken in account as complementary choice to the rigid integration.

• 한국항만경제학회지
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• 제28권4호
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• pp.257-274
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• 2012

글로벌공급사슬간 경쟁이 격화됨에 따라 항만서비스도 항만의 존속과 경쟁력제고를 위한 시장지향적인 가격산정이 크게 필요하다. 협조적 게임이론의 오웬밸류는 선사주체의 시장지향적 항만서비스가격 산정에 활용될 수 있다. 이를 우리나라 광양항의 사례에 적용하여 그 유용성을 확인해보았다. 본 연구결과 부두용 특성함수를 사용하여 선석별 비용배분 문제를 해결하고, Budescu(1993)방법을 통해 안벽사용지수를 구하기 위한 관련요인의 상대적 가중치를 합리적으로 산정하였다. 또한 주요 선사에 대한 사용료 우대방안과 선사간 전략적 제휴에 의한 항만서비스 가격할인방안을 구축하였다. 본 연구를 결과를 활용하여 대형선박을 자주 운항하는 주요 선사에 대한 체계적인 요금할인을 통해 항만서비스요금을 전략적으로 책정 할 수 있을 것이다.