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Implementation of Bandwidth Broker and Router for End-to-end QoS in Differentiated Service Networks (종단간 QoS 보장을 위한 차별화 서비스 지원 대역 브로커 및 라우터 구현)

  • 최영수;박기현;이성협;이강원;채희성;한태만;조유제
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.40 no.12
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    • pp.125-135
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    • 2003
  • In this paper, we developmed and implemented router and bandwidth broker that provides end-to-end QoS in differentiated service IP networks. Our design goal is to provide end-to-end premium service using the EF PHB. The bandwidth broker and router were implemented in the FreeBSD 4.6 platform. For the DiffServ router, we implemented QoS daemon, rollback managment routine, monitoring, and COPS-PR client. Also, Ive implemented bandwith broker which has SLS and resource management function, and signaling protocols for interfacing intra-and inter-domain. On the testbed, we have validated and evaluated the performance of the implemented DiffServ router and bandwidth broker using the inter-domain signaling protocol client in MS Windows platform. The test results show that the end-to-end QoS can be guaranteed for the inter-domain diffServ by the implemented system.

Comparison of shear bond strength of orthodontic brackets using various zirconia primers

  • Lee, Ji-Yeon;Kim, Jin-Seok;Hwang, Chung-Ju
    • The korean journal of orthodontics
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    • v.45 no.4
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    • pp.164-170
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    • 2015
  • Objective: The aim of this study was to compare the shear bond strength (SBS) of orthodontic brackets bonded to zirconia surfaces using three different zirconia primers and one silane primer, and subjected to thermocycling. Methods: We designed 10 experimental groups following the surface treatment and thermocycling. The surface was treated with one of the following method: no-primer (NP), Porcelain Conditioner (PC), Z-PRIME Plus (ZP), Monobond Plus (MP) and Zirconia Liner Premium (ZL) (n=20). Then each group was subdivided to non-thermocycled and thermocycled groups (NPT, PC, ZPT, MPT, ZLT) (n=10). Orthodontic brackets were bonded to the specimens using $Transbond^{TM}$ XT Paste and light cured for 15 s at $1,100mW/cm^2$. The SBS was measured at a 1 mm/min crosshead speed. The failure mode was assessed by examination with a stereomicroscope and the amount of bonding resin remaining on the zirconia surface was scored using the modified adhesive remnant index (ARI). Results: The SBS of all experimental groups decreased after thermocycling. Before thermocycling, the SBS was ZL, $ZP{\geq}MP{\geq}PC>NP$ but after thermocycling, the SBS was $ZLT{\geq}MPT{\geq}ZPT>PCT=NPT$ (p > 0.05). For the ARI score, both of the groups lacking primer (NP and NPT) displayed adhesive failure modes, but the groups with zirconia primers (ZP, ZPT, MP, MPT, ZL, and ZLT) were associated with mixed failure modes. Conclusions: Surface treatment with a zirconia primer increases the SBS relative to no-primer or silane primer application between orthodontic brackets and zirconia prostheses.

An Empirical Study on the Effects of the Determinants of Service Quality to Customer Satisfaction in P&I Insurance (P&I 보험의 서비스품질 결정요인이 고객만족에 미치는 영향에 관한 실증연구)

  • Park, Beom-Shik;Shin, Young-Ran;Shin, Han-Won
    • Journal of Navigation and Port Research
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    • v.35 no.10
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    • pp.855-861
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    • 2011
  • With the rapid growth and development of the Korean Shipping Industry both in external quantum and internal complexity, the marine insurance industry has accordingly expanded with it. This empirical study analyzes the quality factors of the Insurance and P&I Services using 5 factors of quality measures with 22 questions regarding the effect on customer satisfaction by the services offered by the P&I Clubs. The Study is expected to provide P&I Clubs with management tactics for customer satisfaction and the subsequent continued patronage supported by their members through the enhancement of the service quality. This study also provides direction for ship-owners and the members of the P&I Clubs in finding the most efficient service provider as well as in proposing competitive prices of the P&I insurance premium as their management tactic.

A study on the design for the road bike frame made by carbon fiber materials (나노탄소섬유소재(Carbon fiber)를 활용한 로드형 자전거에서의 프레임 디자인 개발에 관한 연구)

  • Kim, Ki-Tae;Kim, Hyun-Sung;Kang, Seung-Min
    • Journal of the Korean Crystal Growth and Crystal Technology
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    • v.27 no.4
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    • pp.178-185
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    • 2017
  • Carbon fiber frames are actively developed for developing carbon fiber frames as the material of the next generation of bicycle frames, and are currently being developed with carbon fiber frames, hardness, shock absorption, light intensity, and strength. The carbon fiber bike models require a premium, differentiated design concept, which is essential to the development of a conceptual and differentiated design, requiring the development of essential structural structures, safety and refinement, and more of their own identity. In this study, a personal and unified image was derived from the research of the needs of consumers and image analysis process and then in the practical design work, the road bike bicycle frame design was proposed targeting the frame on the basis of carbon fiber materials.

A Historical Analysis on the Limitation of Carriers' Liability (운송인(運送人)의 손해배상책임제한(損害賠償責任制限)에 관한 역사적(歷史的) 고찰(考察))

  • Oh, Soo-Geun
    • The Korean Journal of Air & Space Law and Policy
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    • v.5
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    • pp.171-205
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    • 1993
  • On the contrary to the general principle of private law, carriers' liability for passengers and cargo owners have been quantatively limited in some cases. The author traces the rule of liability limitation in the law of Korea and United States to verify two hypotheses. The first hypothesis is that the rule of liability limitation has been introduced to motivate investment when new technology with high risk has been adopted in business. The second hypothesis is that the rule of liability limitation can be maintained only when damages have been fully compensated. The former is a necessary condition for liability limation, and the latter sufficient condition. There are strong evidences for the first hypothesis. Navigation or aviation, artificial satellite lauching, urban transportation system are good examples. The second hypothesis is supported by the fact that there have been continuous controversies on the Warsaw System, including the failure of ratification of Montreal Additional Protocols No.3 & 4 by the U.S. Senate and voluntary removal of liability limitation by the Japanese airline companies. Loss of cargo can be compensated fully, but damages from personal injury and death not. The value of human body and life is not easy to be estimated. Passengers, moreover, do not usually buy insurance for accidents in travel. Passengers do not accept insurance premium as the cost of being whole and alive. They do not accept accident rates realistically. They have no bargaining power in dealing with insurers. The rule of liability limitation in personal losses would not be supported in future because damages have not fully compensated.

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A case study on design collaboration marketing in Korean cross-business (국내 이종업계 간 디자인 콜라보레이션 마케팅 사례연구)

  • Park, Hye-in;Kim, Seung-In
    • Journal of Digital Convergence
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    • v.18 no.5
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    • pp.383-389
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    • 2020
  • The purpose of this study is to suggest consideration and direction of collaboration among different industrial field in Korea which has recently increased through the analysis of design collaboration case of cross-business in domestic. To do this, I did literature research followed with theoretical background of collaboration, and I analyzed case study of collaboration between different industries in domestic. In addition, I categorized as millennial targeting and brand premium positioning shifts. As a result, brand have to select a partner that is appropriate and would be an issue for purpose of collaboration and that the result should have a clear difference from existing product, including the design elements of the brand that they want to highlight. I expect this research will become a reference for collaboration between different industries.

Analysis of the Important Herb Medications Corresponded with Neuropsychiatry of "Bang-Yak-Hap-Pyun" (방약합편(方藥合編)에 수재된 신경정신과(神經精神科) 관련 주요 처방(處方)에 대한 연구(硏究))

  • Kim, Jee-Hoon;Koo, Byung-Soo;Kim, Geun-Woo
    • Journal of Oriental Neuropsychiatry
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    • v.20 no.1
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    • pp.89-106
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    • 2009
  • Objectives : The purpose of this study is to analysis of the herb medications corresponded with neuropsychiatry of "Bang-Yak-Hap-Pyun". Methods : The herb medications of "Bang-Yak-Hap-Pyun" Sang.Jung.Ha-Tong(上.中.下統) and "Enlargement side prescriptions" (增補方) are selected by comment on the chief virtue including reference word of corresponded with neuropsychiatry. Results and Conclusion : "Bang-Yak-Hap-Pyun" is a book most people who have a background or career in Han Medicine(韓醫學) would pore over. They corresponded with neuropsychiatry among the herb medications of "Bang-Yak-Hap-Pyun" Sang.Jung.Ha-Tong(上.中.下統) are 55 prescriptions that Sang-Tong(上統) is 8 prescriptions, Jung-Tong(中.統) is 23 prescriptions and Ha-Tong(下統) is 24 prescriptions. And the herb medications corresponded with neuropsychiatry of "Enlargement side prescriptions" (增補方) are 40 prescriptions. And then the herb medications corresponded with neuropsychiatry of "Bang-Yak-Hap-Pyun" received much influence from "Dong-Eui-Bo-Gam". Incidentally the herb medications corresponded with neuropsychiatry of "Bang-Yak-Hap-Pyun" Sang.Jung.Ha-Tong showed the high percentage in Neurosis. And the herb medications corresponded with neuropsychiatry of "Enlargement side prescriptions" showed the high percentage in Psychosis. Besides not only put "Enlargement side prescriptions a premium on "Dong-Eui-Bo-Gam", but also made it the herb medications which were recorded on books flowed after "Dong-Eui-Bo-Gam" known. It was entered up books quoted from "Bang-Yak-Hap-Pyun" Sang.Jung.Ha-Tong but the herb medications were that were not succeeded from "Bang-Yak-Hap-Pyun" Sang.Jung.Ha-Tong. Therefore "Enlargement side prescriptions" shows the efforts for supplement of "Bang-Yak-Hap-Pyun" Sang.Jung.Ha-Tong.

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Theoretical Background of Division of Role in Technology Financing Based on Uncertainty Implied in Industrial Technology Development (산업기술개발의 불확실성에 따른 금융지원의 역할분담에 관한 이론적 고찰)

  • 김선근
    • Journal of Technology Innovation
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    • v.5 no.1
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    • pp.206-222
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    • 1997
  • The conventional analysis with which justifies government intervention of the private sector's innovation activities is the market failure approach. According to such analysis, fund allocation through autonomous market mechanisms is not optimal in technology financing because of the disparity between the desirable level of investment for society as a whole and that for private firms. To optimize the fund allocation, public policies such as subsidy, preferencial loan and venture capital investment programs are designed for technology development projects performed by private firms. They, however, have not been effective in increasing private investment for such projects. In most cases, it was found that little considerations given to the relationship between uncertainty embodied in technology development projects and each types of financing. With respect to optimizing fund allocation, technology development projects should be financed by different means according to their probability of success and the expected value of technology. Employing various theoretical models on financing decision-making we verify here that technology development projects to be supported by commercial banks or venture capital institutions is limited contingent upon levels of uncertainty adn expected value. Under the assumption that financial institutions are risk averse, loan or investment can be available only if the probability of success of the project is higher than the probability premium and the current market rate of interest. Therefore, the projects that have lower probability of success and/or small expected return are excluded from commercial loan or investment programs. However, the remaining projects, whose probability of success is low but with high expected return, may be applied under government subsidy programs. To achieve optimality of fund allocation and to activate technology financing, we conclude that there should be a systematic division of role among financial institutions including government commercial banks, and venture capital institutions.

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Processing and Quality Characteristics of Sea Mussel Mytilus edulis Sauces from Sea Mussel Complex Extract (진주담치(Mytilus edulis) 복합추출물을 이용한 진주담치소스의 제조 및 품질특성)

  • Kim, Seon-Geun;Cho, Jun-Hyun;Hwang, Seok-Min;Nam, Hyeon-Gyu;Choi, Jong-Duck;Oh, Kwang-Soo
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.50 no.6
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    • pp.656-661
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    • 2017
  • To develop a highly value-added product from extract from small and damaged sea mussels Mytilus edulis, we prepared two types of sea mussel sauce (MS): bottled (BMS) and retort pouched (RMS). We investigated the processing conditions, quality metrics and flavor compounds in each type of sauce. We found that the most appropriate base formulation for both BMS and RMS consisted of 40.0% SME (Brix $30^{\circ}$), 15.0% sugar, 6.0% salt, 4.0% monosodium glutamate, 4.0% soy sauce, 3.5% starch, 3.0% yeast extract, 3.5% wheat flour and 21.0% water. The crude protein, salinity, volatile basic nitrogen and amino-nitrogen content of the BMS and RMS were 8.7% and 8.8%, 9.3% and 9.2%, 24.9 and 31.4 mg/100 g, and 468.5 and 455.1 mg/100 g, respectively. For comparison, the ranges of these values in commercial oyster sauces (COS) are 4.7-7.5%, 10.7-12.0%, 8.2-12.5 mg/100 g, and 225.7-448.2 mg/100 g, respectively. The total free amino acid content of RMS and Premium COS was 7,215.7 and 6,160.7 mg/100 g, respectively, and the main free amino acids were glutamic acid, taurine, glycine, alanine, arginine, proline and lysine. These results demonstrate that BMS and RMS have favorable organoleptic qualities and good storage stability compared to COS, and are suitable for commercialization as high-flavor seasoning sauces.

Application of Conjoint Analysis to Evaluating Alternatives for Outlet Shopping Center Development (컨조인트 분석을 활용한 아웃렛 쇼핑센터 개발대안 평가)

  • Shin, Jong-Chil;Park, Jeong-Hyun;Baik, Min-Seok
    • The Journal of the Korea Contents Association
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    • v.12 no.1
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    • pp.485-499
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    • 2012
  • With the maturity of department stores and discount stores, many Korean retail companies have an interest in developing outlet shopping centers such as Yeoju Premium Outlet so on. To develop a successful outlet shopping center, developers should understand consumer's preferences on many attributes of development alternatives. This study analyzes consumer's preferences on outlet shopping center and evaluates various development alternatives by using conjoint analysis. With empirical research for outlet shopping center development, this study can elicit potential shopper's preference for outlet shopping center. The empirical result shows discount rate is most important attribute to develop outlet shopping center. The potential shoppers have higher preference for higher discount rate. Location is the second important attribute. Brand is the least important attribute. By using utilities derived from analysis, this study performs various choice simulations. Through choice simulation analysis, this study tries to find the best development alternative for new outlet shopping center.