• 한국경영과학회지
• /
• 제24권2호
• /
• pp.31-39
• /
• 1999

A new approximation method for finding the steady-state probabilities of the number of customers present in queueing systems with Poisson arrivals and two servers with different deterministic service times with infinite waiting room capacity is developed. The major assumption made for the approximation is that the residual service times of the servers have mutually independent uniform distributions with densities equal to the reciprocals of the respective service times. The method reflects the heterogeneity of the servers only through the ratio of their service times, irrespective of the actual magnitudes and difference. The transition probability matrix is established and the steady-state probabilities are found for a variety of traffic intensities and ratios of the two service times; also the mean number of customers present in the system and in the queue, and server utilizations are found and tabulated. The method was validated by simulation and turned out to be very sharp.

• 대한산업공학회지
• /
• 제22권1호
• /
• pp.105-114
• /
• 1996

Telecommunication services are typically offered with two-part tariffs which consist of the access charges and the usage charges. In the previous analyses of optimal two-part tariffs, consumers have been assumed to be final users. In this paper, we take the telecommunication service as an input factor which is purchased by business consumers. We proposed a two-stage market model in which the good in queston is produced by an upstream monopolist and purchased as an input by firms and they sell their final outputs in a downstream market. We derive the optimal two-part tariffs of inputs in the case of oligopolistic downstream market with heterogeneous downstream firms. It is shown that two-part tariffs are more desirable than uniform prices from a welfare standpoint. It is also shown that if an upstream monopolist earns positive profits, usage charge is less than marginal cost in the optimal two-part tariffs.

• 대한산업공학회지
• /
• 제34권3호
• /
• pp.289-295
• /
• 2008

The shared-route decision algorithms in multicasting communications networks to provide the internet-based services such as IPTV, remote education/health, and internet broadcasting are presented. The three main measures of maximum delay, average delay and estimated delay between each node and member are adopted. Under the Mesh network with the uniform random cost between each node, the algorithm's performance is compared to the optimal solution with the minimum cost by all enumeration. The simulation results show that the algorithm using the estimated delay outperforms the other two methods.

• 유통과학연구
• /
• 제20권4호
• /
• pp.101-110
• /
• 2022

Purpose: This study is a comparative study to examine the differences between Incoterms 2010 and Incoterms 2010 through a study on the revision contents and conditions of Incoterms 2020. Research design, data, methodology: This study is composed of 5 chapters through literature study. Chapter 1 is an introduction, and Chapter 2 explains the significance and change of standard trading conditions. Chapter 3 compares Incoterms 2020 and 2010. Chapter 4 deals with major revisions and considerations of Incoterms 2020, and Chapter 5 mentions conclusions and implications. Results: In comparison with Incoterms 2020 and Incoterms 2010, first, the selection of the correct Incoterms rules was emphasized through the introduction; second, the division and connection between the sale contract and the ancillary contract were more clearly explained; and third, each Incoterms An explanatory note was presented by improving the existing guidance note for rules, and finally, the order of clauses within individual Incoterms rules was changed to further emphasize delivery and risk. Conclusions: This study pays attention to the understanding of academic content related to standard trade terms and conditions and how usefully it can be used in the business process of users in practice.

• 무역상무연구
• /
• 제21권
• /
• pp.129-151
• /
• 2003

Nowadays even if environment of international commercial transaction is changing quickly municipal law could not meet with such change accordingly. So far, however, efforts towards unification have prevailingly taken the form of binding instruments, such as non-national or supranational legislation, international conventions or international model laws. Among them, the UNIDROIT Principles with parties' autonomous and yet non-binding character do not only meet the substantive requirements of a true law merchant. In addition they also counter some of the main points of criticism against the modern lex mercatoria. As such the Principles constitute a cornerstone in the lex mercatoria debate and may become the heart of the new lex mercatoria. The purpose of this article is to ask whether there could be applied the Principles in international commerce. For the purpose it is to investigate when the Principles are applied in international commerce and how effectively the Principles are applied for the decision in international commercial disputes. Even though the Principles are used for reference by parties involved for the voluntary regulation of their contract, it is sufficiently expected that the Principles are to be a stepstone of uniform contract law in international commerce. Until now cases of appling the Principles are not satisfied with its expectation as a source of non-legislative means of unification or harmonization of law. Given the party's autonomy in the contract, this is among other things because business parties are strongly tend to observe their national laws in their international commerce. And also, even though there are a number of neutral and uniform regulations for international commercial contracts, parties do not often recognize their usefulness with being up to expectation. In order to explore the applicability of the Principles a number of cases of ICC International Court of Arbitration and others are quoted.

• 대한가정학회지
• /
• 제27권3호
• /
• pp.13-28
• /
• 1989

With the purpose of identifying clothing for persons with special needs one of new directions in Clothing and Textiles, this pater comparatively analyzed current curriculum and research trends related to this field between Korea and America. Questionaire was distributed to 25 Korean colleges with Clothing and Textiles department and 4 American colleges known for special clothing study. Questions regarded the name of course, level (grade), number of credit houre, prerequisits and supporting courses, subjects of lecture and projects, way of managing lecture and projects, evaluation system, other special characteristics. Resources for analyzing research trends are Thesis and Dissertations in Clothing and Textiles, Research Journal of Clothing & Textiles/Home Economics Association, College Professors' research reports collection, of both Korea and America. Years of publications are 1972∼1986 (America), 1978∼1988 (Korea). Findings are as follows; 1. Clothing for special needs can be classified into various groups; Clothing for physically handicapped, mentally retarded, elderly, unusual-sized, pregnant/nursing mothers, institutionalized, protective clothing, uniform/career apparel. 2. Management of coursework related to special clothing has several common characteristics specially in America; Building-up coursework, problem-solving orientation, cooperative team-preject, interdisciplinary approach, client-versus-designer preference, community involvement. In Korea, a few school only has special clothing coursework and its scope of study was very limited. 3. Majority of research reports done with the subjects of special clothing had made for physically handicapped people and the elderly. Protective clothing and uniform have recently been paid much interests. 4. Researchers had mainly concerned on Design and Construction Aspects and nextly on social-psychological aspects. However, in America, selection and care aspects and marketing aspects of special clothing have been very procuctive issues recently. 5. Study on clothing for special needs has several opportunities to be stressed and improvements to be strengthened. Opportunities included active participation to the welfare of community society, strong publicity of accurate professional image, share with business and industry, interdisciplinary approach and new job market. Improvements were discussed in terms of strengthening supporting courses/prerequistes, intensifying interdisciplinary cooperation, provoking strong community involvement and securing financial support and research funds.

• 한국산학기술학회논문지
• /
• 제11권1호
• /
• pp.220-227
• /
• 2010

폐기물을 이용한 고형연료의 제조는 온실가스 저감과 대체연료로써의 이윤 창출 목적으로 많은 연구가 진행되었고, 이로 인해 상용화가 이루어 질 정도로 기술적인 발전을 거듭 하였다. 하지만, 단일폐기물에 대한 고형연료의 제조는 성분 변화가 별로 없지만 여러 가지 폐기물을 혼합하여 고형연료를 만들 경우에는 주의가 필요하다. 본 연구에서는 다양한 폐기물을 이용하여 제조한 고형연료의 특성 분석을 하였다. 특성분석 결과 성형 전 폐기물과 성형 후 고형연료는 발열량 차이가 크게 나타났으며, 그 원인으로는 폐기물의 성상, 수분, 혼합정도에 기인되었다. 균일 혼합 후 폐기물 고형연료는 발열량이 6,000kcal/kg을 넘었다.

• 한국의류학회지
• /
• 제35권9호
• /
• pp.1125-1137
• /
• 2011

This study investigates when and why the light pink Dan-ryoung appeared as part of the official uniform of the Joseon Dynasty and which official uniform used the light pink color. The Annals of the Joseon Dynasty, books written by scholars, and related laws were used as research materials. The following results were obtained by analyzing the arguments of kings and officials on light pink uniforms and laws related to official uniforms. 1. Red was the color of the king as well as the color of Dang-sang-gwan's Gong-bok (one of the official uniforms). 2. The colors such as To-hong, Dam-hong, Do-hong, Bun-hong, Cheon-hong that appeared in Sang-bok (among official uniforms) were relatively lighter than red. 3. To-hong started to be used in Sang-bok at the time of King Se-jong and was used at the time of King Seong-jong in Sang-bok because it was the preferred color. 4. In the Joseon Dynasty, safflower (the basis of red color dye) was cultivated extensively; in addition, people liked red dyeing because it was relatively easy apply; subsequently, a ban on red dyeing was continually issued. 5. Kings Se-jong and Jung-jong ordered officials to use Do-hong and Bun-hong to distinguish the red color of the king. After Im-jin-oe-ran, Cheon-hong was officially designated the color of Sang-bok. 6. The reasons why Dam-hong was used in official uniforms were twofold: the preference for red-like colors and the influence of the Confucian hierarchy to distinguish the king.

• 한국의류학회지
• /
• 제36권7호
• /
• pp.767-777
• /
• 2012

This study analyzed the system and arguments on the light-pink official uniforms and investigated the backgrounds and principles on the changes of the Sibok system. A study on light-pink danryeong in the latter part of the Joseon Dynasty is a de facto study on Sibok since the name of the light-pink official uniforms (implemented at the time of King Seonjo) changed from Sangbok to Sibok. Sangbok is discussed to explain the name change from Sangbok to Sibok and distinguish their usages; in addition, Gongbok is examined to understand the characteristics of the Sibok system. The Annals of the Joseon Dynasty (books written by scholars) and related laws are used as research materials. The research results are as follows. The name of the light-pink uniforms (a custom before the Japanese invasion in 1592) changed from Sangbok to Sibok at the time of King Gwanghaegun and the light-pink uniform was used as a relatively light formal uniform compared to Sangbok. Sibok was added to the law Sok-dae-jeon at the time of King Yeongjo (because the king respected the custom) and its color rank system was denoted from light-pink and red. Sibok was revised to light-pink, blue, and green under the law Dae-jeon-tong-pyeon that was promulgated at time of King Jeongjo. In the development of the Sibok system in the latter part of the Joseon Dynasty, the color rank system of Gongbok was reflected. The sovereign ideas in the official uniforms in the latter part of the Joseon Dynasty (revealed in the study of the system and arguments on the light-pink official uniforms) were the thoughts that respected the custom and the principles that distinguish ranks to establish a Confucian based hierarchy.

• 한국프랜차이즈경영연구
• /
• 제5권1호
• /
• pp.85-108
• /
• 2014

본 연구는 공정거래위원회의 프랜차이즈 정보공개서상의 재무자료(자산, 부채, 자본, 매출액, 영업이익 및 당기순이익)를 사용하여 프랜차이즈본사의 자산규모, 재무구조, 수익성 및 성장성에 관한 정보를 연구하였다. 분석 자료는 패스트푸드, 가족식당, 제빵, 농수산과 주류산업의 1,050개 프랜차이즈 본사의 2011년과 2012년 자료를 수집되었다. 연구 결과는 다음과 같다. 기업자산규모에서는 중위수가 675백만 원이었고 중위수까지의 회사의 누적 수는 49.9%에 이르렀으나, 자산규모의 총 누적율은 0.48%에 불과하여 규모의 영세성을 나타내었다. 재무구조에서는 525개사(50%)의 회사가 부채비율이 200% 이하였고, 314개사(29.9%)가 부채비율이 200% 이상이었으며, 211개사(20.1%)가 자본잠식 상태였다. 이러한 결과는 재무구조의 취약성을 나타내는 것을 의미한다. 수익성에서는 ROA의 중위수가 4.72%에 불과하여 낮은 성장성을 나타내었다. 성장성에서는 매년 매출성장률의 중위수가 7.5%를 나타내어, 프랜차이즈산업이 성숙기의 특성을 나타내었다. 본 연구의 이러한 연구 결과는 전반적으로 외식관련 프랜차이즈 본사의 재무상태가 개선되어야 한다는 것을 시사해주고 있다.