• Journal of Information Technology Applications and Management
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• 제20권4호
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• pp.263-278
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• 2013

SNS users have increased at rapid rate. Many firms are expected to use SNS, especially in marketing area. This study describes a SNS-based new products promotion case study. We aim to identify how differently SNS users respond to different types of SNS media or SNS contents. In this analysis marketing effects are measured in a number of website hits. The study result shows how the number of user's hits differs upon a combination of SNS media and SNS contents.

• 한국기계가공학회지
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• 제17권1호
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• pp.82-88
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• 2018

An experimental study was performed on the orifice nozzle system that generates micro-bubbles by air self-suction using a venturi nozzle. This study experimentally investigates the amount of air sucked into the venturi nozzle and the number of micro-bubbles generated by the orifice nozzle system in Cases 1 and 2. The experimental conditions were varied by changing the diameter of the orifice nozzle (d=2~7 mm) and the number of holes of the perforated plate nozzle (n = 2-12). In Case 1, the air self-suction was more than 2 LPM at $d{\leq}4mm$. When d = 4 mm, the total number of bubbles was 29,777, and it was confirmed that micro-bubbles occupied approximately 65% of the total number of bubbles. In Case 2, the air self-suction was maintained constant at approximately 2.5 LPM regardless of the number (n) of holes. The total amount of bubbles increased when n increased but remained constant at approximately 44,000 when $n{\geq}7EA$. It was also confirmed that more than 80% of all bubbles were micro-bubbles when $n{\geq}10EA$. Thus, the number of micro-bubbles increased by approximately 15% compared to the experimental result of Case 1, which was optimized with d = 4 mm.

• 한국화재소방학회논문지
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• 제19권2호
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• pp.37-44
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• 2005

가스계소화설비인 $CO_2$소화장치의 구성 중 $CO_2$노즐수에 따른 유동특성 및 $CO_2$소화제 농도분포를 분석하기 위하여 $CO_2$ 노즐수를 변화시키면서 전산모사실험을 3차원 비정상상태로 수행하였다. 실제 선박의 기관실을 방호공간으로 선정하여 유동장과 $CO_2$소화제 농도장을 계산하였다. $CO_2$소화제 노즐수를 2개에서 4개로 증가시킬 경우는 낮은 농도분포를 나타냈고, $CO_2$소화제 노즐수를 6개 이상으로 증가시킬 경우는 전 영역에 영향을 미치는 재순환 유동이 형성되었다. $CO_2$소화제 노즐수를 4개 이상 증가시킬 경우는 0.36이하의 등농도선대가 확장 또는 수축되었다. 따라서 $CO_2$ 소화장치 설계 시 적정한 소화제노즐수와 노즐배열을 고려해야 할 것으로 생각된다.

• 충청수학회지
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• 제22권2호
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• pp.229-234
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• 2009

Let f : $X{\rightarrow}X$ be a self-map of a connected finite polyhedron X. In this short note, we say that the mod H Nielsen number $N_H(f)$ is well-defined without the algebraic condition $ f_{\pi}(H)\;{\subseteq}H$ and that $N_H(f)$ is the same as the q-Nielsen number $N_q(f)$ in any case.

• 지식경영연구
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• 제16권1호
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• pp.209-224
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• 2015

Previous studies provided that limiting the number of services provided in hospital had influences in decreasing cost in delivering medical services. Hospitals could have positive effects on their profit by concentrating small number of services which they have comparative advantages. This study purposed to analyze the relationship between the concentration status of hospitals and medical charge for inpatients. National Inpatient sample data provided by the Health Insurance Review and Assessment Service (HIRA) for three years, 2009 to 2011 was used to compute the three concentration indices (Information Theory Index (ITI), Internal Herfindahl Index (IHI), and number of distinct Diagnosis-Related Groups (DRGs) treated) and total medical charge per inpatient case in each year. It was also used to select the control variables such as bed size, number of doctors per 100 beds, and locations. The ordinary least square regression models were developed and tested for hospital and general hospitals separately. The results showed that the total medical charge per inpatient case was significantly differed depending on the concentration indices, and there were positive relationships in ITI and IHI. The number of distinct DRGs had different directions in regression coefficients depending on the locations and hospital types. Hospitals had larger absolute standardized regression coefficients compare to those of general hospitals. However, their effects could be varied by the hospital types, number of doctors, and locations. It seems that hospitals have more influences on medical charges by concentrating their services than general hospitals. Study results provide knowledges to hospital administrators that concentration strategy can positive influences on the performance of small size hospitals.

• 한국중재학회지:중재연구
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• 제9권1호
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• pp.139-160
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• 1999

International commercial arbitrations have developed into a simple form in which both parties involved in the dispute by a contract intend to solve the dispute through the legal arbitration system. however nowadays the above traditional form taken by international projects are rarely seen and instead the form of complex arbitration in which many parties are involved has become more and more universal. The complex arbitration means not only many-sided parties concerned but also means a plural number of contract involved in conflicts, a plural number of issues involved in conflicts and a plural number of contracts though their contractors are not in a plural number. However in this report the complex arbitrations will be studied into categories as follows : 1. Pure multi-issue situations, 2. Pure multi-party situations, 3. Pure multi-contract situations. A Pure Multi-Issue arbitration basically includes a plural number of claims between the two parties concerned. A Pure Multi-party case classically presupposes an arbitration clause which involves a plural number of parties concerned. After Party A takes a legal proceeding and then Party B institutes a request to Party C in the above proceeding. In that case the problem arises on whether it is allowed to do so or not. A Pure Multi-Contract case presupposes that when Party A and Party B have independent arbitration clauses based on separate contract relations, respectively, the problem is whether both above-mentioned proceedings can be unified into one or not. As for the above-mentioned complex arbitration, though international treaties are being formed, including the WTO treaties, the NAFTA treaties, the Mercosur treaties and others, legal regulations and customs have not yet been formed domestically. The institutional preparations will be necessitated in consideration of national legal status as well as international treaty relations.

• 한국문헌정보학회지
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• 제12권
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• pp.7-37
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• 1985

In most of the modern libraries throughout the world, it is popular to adopt the author number which arranges the books or entries in alphabetical order of their author's names within the same ultimate class. However, viewed historically, that was the Western practice never used in the East before. Traditionally chronological order was followed in the East. Book number not only individualizes the books within the same class but also makes it easy for the user to choose and find out the relevant materials. In this respect, chronological book number is decidedly superior to all kinds of book number systems ever have been existed. Especially in these days of rapid obsolescence of documents and with serious problems of storage of documents, the chronological order seems to be the most modern and future-oriented of all other book number systems because it distinguishes clearly new materials from aged materials by the date of publication and controls the stack spaces mechanically and effectively. This writer devised New Chronological Book Numbers adaptable to both the Eastern and Western materials, and the system has been adopted at Yonsei University Library. The features of the system are as follows: (1) It is easy to type the call number in cataloging the Eastern and Western materials. That is because the structure of the chronological number is pure numerical notation by taking the last two figures of the year within twentieth century(e.g. 85 for AD 1985), that is 1900s, and the last three figures of the year from twenty-first century to thirtieth century, that is 2000s. (2) It does not make all classes have chronological number uniformly. Within the classes for individual biographies, genealogies and collections of biography of specific family, books about individual organization, individual literary and artistic works, philosophical works of the famous philosophers, books and its facsmile editions published before 1900, new editions, translations, commentaries, serials, chronological number is assigned to the author number as in the past. (3) It separates the Eastern materials from the Western materials and makes the typing easy in cataloging. That is because the subarrangement within the same chronological book number is made by the accession order which uses 'panjol-ponmun' or the characters of basic syllabic table of Korean alphabet in case of the Eastern materials and Roman alphabet in case of the Western materials.

• 설비공학논문집
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• 제29권8호
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• pp.401-407
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• 2017

The effect of different rib geometries such as V-shaped continuous (case A), parallel broken (case B), and V-shaped broken (case C) ribs on local heat transfer distributions and pressure drops in a divergent channel with $30^{\circ}$ inclined ribs on one wall or two walls was investigated for Reynolds numbers from 22,000 to 75,000. Top and bottom walls were insulated; two side walls were uniformly heated in the divergent channel. Heated walls were composed of 10 isolated coper sections and length-to-outlet hydraulic diameter ratio of 10. Rib height-to-outlet hydraulic diameter ratio was 0.1, and rib pitch-to-height ratio equaled 10. Results revealed that V-shaped continuous rib (case A) produced approximately 1.4 times higher average Nussselt number than in the parallel broken rib (case B), and V-shaped broken rib (case C) in the channel with two ribbed walls at Re = 54,000.

• 보건행정학회지
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• 제11권3호
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• pp.46-70
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• 2001

Medical Aid expenditure Increased rapidly at a higher rate than that of Medical Insurance during the period 1992-1999. To establish an effective cost containment strategy, knowledge of the cause and the nature of the increase of Medical Aid expenditure is required. The purpose of this study was to analyze increasing rates of Medical Aid expenditure by the components of medical expenses. Data were collected using the Medical Aid Statistical Yearbook during the period of 1992-1999. The major findings were as follows: 1. The annual mean increasing rate of Medical Aid expenditure between 1992 and 1999 was 22.8%, which exceeding that of Medical Insurance expenditure (17.5%) between 1992 and 1999. Since 1998, Medical Aid expenditure increased even more rapidly than in previous years, with the increase in number of Medical Aid beneficiaries. 2. Of Medical Aid expenditure, that of inpatient and outpatient annually increased 24.2% and 22.8% respectively and that of type 1 and type 2 increased annually 28.8% (outpatient) ∼29.9% (inpatient), 14.3% (outpatient) ∼ 15.5% (inpatient). Therefore, Medical Aid expenditure of inpatient and type 1 led the increase of Medical Aid expenditure. 3. Between 1992 and 1997, the frequencies of utilization per beneficiary and the charges per case positively contributed to the increase of Medical Aid expenditure while the number of beneficiaries contributed negatively, but since 1998, the number of beneficiaries increased and positively contributed to the increase of Medical Aid expenditure. 4. According to the analysis of the charges per case, the increase of the price index led to the increase of the charges per case but the days of medication and service intensity also contributed to the increase of the charges per case variably by year. Considering the above findings, factors associated with the Medical Aid system affected the increase of Medical Aid expenditure in addition to the general factors of the increase in medical expenditure. In conclusion, it appears that a more intensive cost containment strategy is required to control rapidly increasing Medical Aid expenditure. For this, more precise analysis and development of policy considering the effect of the number of beneficiaries and the increase of price index is needed.

• 대한기계학회논문집B
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• 제30권7호
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• pp.656-662
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• 2006

The effects of concave hemispherical surface with inclined angle on the local heat transfer from a turbulent round jet impinging were experimentally investigated using transient liquid crystal method. This method suddenly exposes a preheated wall to an impinging jet and then the video system records the response of liquid crystals for the measurement of the surface temperature. The Reynolds numbers were used 11000, 23000 and 50000, nozzle-to-surface distance ratio from 2 to 10 and the surface angles $\alpha=0^{\circ},\;15^{\circ},\;30^{\circ}\;and\;40^{\circ}$. Correlations of the stagnation point Nusselt number according to Reynolds number, jet-to-surface distance ratio and dimensionless surface angle are investigated. In the stagnation point, in term of $Re^n$, n ranges from 0.43 in case of $2{\leq}L/d\leq6$ to 0.45 in case of $6. The maximum Nusselt number occurs in the direction of upstream. The displacement of the maximum Nusselt number from the stagnation point increases with increasing surface angle or decreasing nozzle-to-surface distance. The maximum displacement is about 0.7 times of the jet nozzle diameter.