• 한국응용과학기술학회지
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• 제11권1호
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• pp.53-60
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• 1994

The Synthesis of azobenzene containing long chain fatty acid and poly vinyl alcohol by esterification reaction($C_{n}-Azo-PVA$) was optimized, starting from P-(P'-hydroxy phenyl azo)-benzoic acid and the product of reaction containing azobenzene chromophores was investigated by ultraviolet spectrophotometery in toluene solvent at room temperature. In addition, UV absorption spectra of Langmmuir Blodggett (LB) film deposited on quartz plate have been measured and the structure of these compounds were ascertained by means of Ultraviolet and FT-IR. Recrystallization of reaction product in the solvent results the experimental yield obtained about 22.27% P-(P'-octadecyloxy phenyl azo)-benzoic acid-poly vinyl alcohol. Long chain azobenzene derivative-poly vinyl alcohols are induced phtoisomerization by u, v, and visible light irradiation. The LB film of azobenzene containing long chain fatty acids($C_{18}-Azo-PVA$) are possible of being applied to functional molecular devices such as photomemory and light switching.

• 산업공학
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• 제21권2호
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• pp.161-169
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• 2008

Normally, suppliers have to decide on what, how much, and when to replenish stocks of goods based on a data flow generated by a vendor managed inventory(VMI) system. But information from supply chain is often misleading. It is common for such data to be distorted by a lack of coordination and synchronization across several business entities managing different supply chain operations. This phenomenon is called the 'bullwhip effect(BwE)'. Many researchers, working over many years, have studied the reasons for the BwE. They have proposed various remedies, but this phenomenon persists. Though overlooked in previous research, this paper reveals that the 'lot size' of a supply chain of distribution is indeed the main cause of the BwE. In addition, some problems in the existing methods of measuring the BwE are identified and a revised much improved method of measurement is suggested.

• 한국치위생학회지
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• 제15권6호
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• pp.1063-1071
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• 2015

Objectives: The purpose of the study is to investigate the quantitative detection of periodontal pathogens before and after scaling by real-time polymerase chain reaction. Methods: Participants were voluntarily recruited at D university, and saliva samples were extracted before and after scaling. Multiple real-time polymerase chain reactions were used to analyze characteristics and the amount of nine kinds of periodontal pathogens; Aggregatibacter actinomycetemcomitans, Porphyromonas gingivalis, Tannerella forsythia, Treponema denticola, Prevotella intermedia, Fusobacterium nucleatum, Parvimonas micra, Campylobacter rectus, and Eikenella corrodens. Results: After scaling, most periodontal pathogens except Eikenella corrodens were significantly decreased in all subjects(p<0.05). In addition, the percentage of microorganisms associated with disease, the microorganism risk index of periodontitis and the prevalence of red complex, orange complex, and Aggregatibacter actinomycetemcomitans was also significantly reduced after scaling(p<0.05). Conclusions: Scaling decreased in the amount of major periodontal pathogens and periodontitis prevalence rate.

• 한국응용과학기술학회지
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• 제12권1호
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• pp.109-114
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• 1995

The Synthesis of long chain fatty acid containing azobenzene and $(C_{n}-Azo)$ was optimized, starting from p-(p'-hydroxy phenyl azo)-benzoic acid and the product of reaction containing azobenzene chromophores was investigated by ultraviolet spectrophotometery in chloroform solvent at the various temperature. In addition, Reversibility and stability of azo compounds have been measured by means of Ultraviolet and the structure of these compound were ascertained by means of FT-IR and NMR. Recrystallization of reaction product in the solvent results the experimental yield obtained about 62.93% p-(p'-octadecyloxy phenyl azo)-benzoic acid. Long chain azobenzene derivatives in chloroform solution are induced photoisomerization by u. v. and visible light irradiation. The solution of long chain fatty acids$(C_{n}-Azo)$ containing azobenzene are possible of being applied to functional molecular devices such as photomemory and light switching.

• 한국항해항만학회지
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• 제37권6호
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• pp.709-718
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• 2013

In this study, AHP analysis was conducted through a survey that was organized by 9 job categories. The results show that sustainable operation risks have the highest priority level among all criteria with management interest having the highest priority level within sustainable operation risks related attributes. The most important risk attributes among stakeholder risks appeared to be asset security and cargo and conveyance security, with education and training being the most important among regulatory risks. Effective management and response to the risks from export controls on strategic trade require an understanding of supply chain security and compliance programs, effective training programs, investments for development of security systems that meet international standards. In addition, the government needs to focus on developing professionals and providing support for companies with compliance programs, working closely with businesses.

• International Journal of Advanced Culture Technology
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• 제7권3호
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• pp.166-177
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• 2019

Radio Frequency Identification (RFID) skill is becoming a technology that might deliver a response to manual glitches. The use of tags, receiver and wireless surfs to join with each other would mean that RFID in combination with the EPC would speech these pain opinions and offer many welfares in different sectors such as production, distribution, trade, logistics, and security. Potential benefits include increased visibility rising supply chain, enlarged proficiency and cost savings through improved data harmonization, better responsiveness to actual prominence change. Trendy the case of the textile or industrial applications, recent systems used by the industry to control the supply chain in addition strength discernibility are being studied, besides improvements in the overall perceptibility of assets are anticipated through labels, readers, drivers, POEs, etc. this model will be developed with new situations and a lively construction industry. It will be focused on Cost, Hardware compatibility, security and maintenance issues.

• 공업화학
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• 제4권2호
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• pp.423-431
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• 1993

Glycerol monostearate/POE(100) monostearate 혼합비이온계면활성제를 유화제로 사용한 O/W 에멀젼에 고급알코올인 1-hexadecanol/1-octadecanol 혼합물을 보조유화제로 첨가하여, 상거동 및 유동특성을 관찰하였다. 고급알코올의 결정구조가 변화하는 전이점은 1-hexadecanol/1-octadecanol의 조성에 따라 서로 다른 값을 가지며, 2/1의 비율에서 최저값을 나타내었다. 고급알코올의 첨가에 따라 에멀젼 내에는 액정이 형성되며, 이들로 인하여 에멀젼 입자간 응집체인 2차 입자가 형성되어 에멀젼의 점성도가 증가하였다. 에멀젼계의 온도가 고급알코올의 전이점 이하로 저하되면, 고급알코올의 지방족 사슬의 운동성이 제한된 겔구조가 형성되어 점성도가 증가하였으나 시간이 경과함에 따라 액정이 사라지고 에멀젼의 점성도도 저하되었다. 용액 내의 분산되는 양(본 실험에서는 2wt%) 이상의 고급알코올을 첨가해야 에멀젼 내에서 고급 알코올/계면활성제/물이 액정을 형성하였으며, 과량(본 실험에서는 10wt%)의 고급알코올을 사용하면 2차입자가 형성되지 않았다.

• 경영정보학연구
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• 제21권3호
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• pp.27-47
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• 2019

본 연구의 목적은 방한 외국인을 위한 블록체인 기반 결제시스템에 대한 소비자 수용의도를 규명하여 거래 편의성을 높이는 결제플랫폼 개발의 방향성을 제시하는 것이다. 이를 위해 블록체인의 특성으로 보안성, 신뢰성, 기능성을 도출 했다. 도출된 특성을 토대로 제안된 모델의 구조적 검증을 통해 소비자들의 측면에서 블록체인 기술수용에 영향을 미치는 요인을 확인하였다. 통합기술수용이론을 적용하여 성과기대, 노력기대, 사회적 영향, 촉진 조건, 인지된 혜택과 수용의도 간의 인과관계, 개인의 혁신성과 블록체인 인지수준에 따른 조절효과를 검증하였다. 개인의 혁신성과 블록체인 기술 인지수준에 따른 수용의도 차이에서도 혁신성향이 강하고 전반적인 기술에 대한 인지상태가 높은 집단이 블록체인 시스템을 기반으로 제시된 블록체인 수용의도에 더 많은 인과관계를 보여주었다. 또한, 블록체인 수용의도에 직접적인 영향을 미치는 요인은 기대되는 편익(성과기대), 이 서비스를 사용하기 위해 필요한 기술적 기반구조(촉진조건), 소비자 입장에서의 인지된 혜택(보안 및 신뢰, 기능성) 등 4가지 기제이다. 새로운 기술의 용이성(노력기대)과 기술을 도입할 때 주변 환경의 영향(사회적 영향)은 수용의도에 유의미한 영향을 미치지 못했다.

• Asia Marketing Journal
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• 제13권3호
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• pp.183-208
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• 2011

기존의 리더십과 관련된 연구들은 대부분 조직 내부의 부하와 상사간 관계에 초점을 맞추고 있다. 이는 조직간 거래관계가 기업의 주요한 성패요인이 된 현시점에서 조직 간 리더십에 대한 연구의 필요성을 제기하는 현상이라 할 수 있다. 특히, 조직 간 거래관계가 분석의 초점인 공급체인 연구에서는 이러한 조직 간 리더십에 대한 연구가 더욱 필요하다 할 수 있다. 따라서 공급체인의 조직간 리더십을 연구하는 것은 매우 중요하다 할 수 있다. 하지만 기존 공급체인 리더십 관련 연구들은 두가지 중요한 문제점을 가지고 있다. 첫째, 대부분의 연구들이 공급체인 리더십과 성과 간의 관계에 초점을 맞추고 있다는 점이고, 둘째, 기존 공급체인 내 조직간 리더십 연구들은 리더십과 재무성과 간 관계를 거의 다루지 않았다는 점이다. 이에 본 연구는 공급체인 리더십의 선행변수를 발견하고, 리더십-성과 간 관계에 영향을 미칠 가능성이 있는 조절변수를 실증하였다. 특히, 본 연구에서 관심이 있는 공급체인 리더십의 선행변수는 최근 그 중요성이 강조되고 있는 관계적 행동 변수를, 리더십-성과 간 관계의 조절변수로는 리더의 윤리성을 검정하였다. 국내 5대 편의점에 상품을 공급하는 공급업체 납품담당자 217명을 대상으로 설문조사를 실시하였고, PLS(Partial Least Square) 분석방법을 통해 분석한 결과 대형 유통업체의 관계적 행동 중 교육훈련, 공정한 보상, 조직간 의사소통은 공급체인 리더십을 강화하였고, 공급체인 리더십은 공급업체의 재무성과를 강화하는 것으로 나타났다. 또한 대형 유통업체의 윤리성이 높은 경우 공급체인 리더십이 공급업체 재무성과를 더 강화시키는 것으로 나타났다. 반면 대형 유통업체의 관계적 행동 중 비전제시는 공급체인 리더십에 영향을 미치지 않았다.

• 유통과학연구
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• 제11권12호
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• pp.25-37
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• 2013

Purpose - The structure of retailing has changed as retailers develop markets in response to business environment changes. This study aims to analyze the general situation of retailers in order to predict future global strategy using case studies of overseas expansion strategy and the Metro Group's global strategy. Research design, data, and methodology - The backgrounds to the new retail business model and retailer classification are analyzed as theoretical data. In addition, the key success point of the Metro Group's "cash and carry" strategy is analyzed as is the Metro Group's global CFAR (collaborative planning, forecasting, and replenishment) strategy. Finally, the plan for cooperation and precise forecasting under the Metro Group's supply chain management are analyzed from the promotion environment viewpoint. Related materials analyzed included the 2012 annual report, the Metro Group's web page, and a video interview with the executive in charge of global strategy and the new market development department. Some data were revised to avoid disrupting essential aspects of the case studies. Results - The important finding was that the Metro Group could be a world-class retail company with its successful global expansion strategy. The Metro Group's global strategy's primary goal is to have a leading business position in Eastern and Western Europe. The "cash and carry" strategy is highest priority in its overseas expansion strategy. Moreover, the Metro Group has standardized product planning capacity, which could be applied in various countries with different structural and cultural backgrounds. This is the main reason that the Metro Group could rapidly become successful in the Eastern Europe and Asian markets through its structural overseas expansion strategies. In addition, the Metro Group emphasizes the importance of supply chain management. Conclusions - First, retailers should create additional value through utilizing the domestic market, market power, and economies of scale to launch a global strategy to maximize benefits from diversification. Second, the political, economic, and cultural background of the target country needs to be understood to successfully implement the overseas expansion strategy. Third, the main factor of successful cooperation with a local partner is how quickly the company gains total understanding of the business resources and core competence of its partner. All organizations should focus on the achievement of goals in order to successfully operate the partnership. Fourth, retailers should improve their business, financial and organizational structure. Moreover, the work processes and company culture should also be improved to respond strongly in the competitive global market. Fifth, the essential point of a successful retail business is the control capacity of its branding and format. The retailer could avoid forecasting errors through supply chain management by perfectly distributing the actual amount of its inventory. In addition, the risks along the supply chain are effectively shared between the supply chain partners. Finally, the central tendency of the market is to gain in strength with this taking place across all parts of the business.