• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 2001년도 춘계 학술대회논문집
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• pp.99-104
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• 2001

This paper deals with the development of shock stable scheme that is free from shock instability. Roe's FDS is known to preserve good accuracy but to suffer from shock instability, i.e. the carbuncle phenomenon. As the first step toward the shock stable scheme, Roe's FDS is compared with HLLE scheme to identify the source of shock instability. Then control function f is introduced into the pressure term in Roe's FDS to cure shock instability. Various numerical tests concerned with shock instability are performed to demonstrate the shock stability of the proposed scheme.

• Fisheries and Aquatic Sciences
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• 제3권1호
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• pp.44-48
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• 2000

In order to utilize chum salmon returned in the east coast of Korea, the changes in the properties of Yeonual-jeot (salted salmon roe) fermented at different temperatures were measured for obtaining the basic data for its commercial production. Moisture content of salted salmon roe was significantly lower than raw salmon roe, while other proximate components were in the reverse. pH was constant for 56 days fermentation at $5^{\circ}C$, but decreased with fermentation Reriod at 10 and $15^{\circ}C$. The contents of amino-nitrogen and VBN were almost in constant at $5^{\circ}C$ up to 28 days of fermentation, but increased very slowly at $10^{\circ}C$ and moderately at $15^{\circ}C$. TBA value, and the numbers of total viable cells and lactic acid bacteria increased over all fermentation periods, more at higher fermentation temperatures.

• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 2005년도 춘계 학술대회논문집
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• pp.128-134
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• 2005

In the CFD area, the numerical analysis of high Mach number flow over a blunt-body poses many issues. Various numerical schemes have been developed to cover the issues, but the traditional schemes are still used widely due to the complexities of new schemes and intricacy of modifying the established codes. In the present study, the well-known Roe's FDS based on TVD-MUSCL scheme is used for the solution of very high Mach number three-dimensional flows posing carbuncle and non-physical phenomena in numerical analysis. A parametric study was carried out to account for the effects of the entropy fixing, grid configurations and initial condition. The carbuncle phenomena could be easily overcome by the entropy fixing, and the non-physical solution could be eliminated by the use of the modified initial condition regardless of entropy fixing and grid configurations.

• Proceedings of the Safety Management and Science Conference
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• 대한안전경영과학회 2013년 춘계학술대회
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• pp.687-692
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• 2013

In this paper, we provide application strategies of representative finance and investment metrics using breakdown properties of Return On Equity(ROE). The research discusses the relationship of ROE for finance and investment metrics such as Return On Asset(ROA), Return On Invested Capital(ROIC), Price Book Ratio(PBR), and Price Earning Ratio(PER). Furthermore, we provide three different perspectives of its purpose and utility of Residual Income(RI) Models, Market Value(MV) Models and Enterprise Value(EV) Models.

• Korean System Dynamics Review
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• 제12권2호
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• pp.95-126
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• 2011

This paper aims at developing a System Dynamics model with an augmented predator-prey interaction structure to deal with the population management of roe deer in Jeju, Korea. Although people still regard the creature as one of the important tourist attractions, there has been much debate on the issues of the appropriateness of the population size of roe deers because they have been stigmatized as crop damagers, and roadkill/poaching victims due to their natural habit to move around from the top mountain to the lowland of the island. The model is therefore to incorporate these migrating and grazing behaviors into an augmented Lotka-Volterra model coupling roe deer population in both parts of the island to that of predators and preys of the species. The authors also provide a comprehensive set of dynamic hypotheses and relevant CLD/SFD to understand the population dynamics of roe deer and co-evolving species and perform the steady-state analysis of the proposed equation system to verify the model behavior of the numerical example lastly presented in this paper.

• The Korean Journal of Financial Studies
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• 제4권1호
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• pp.1-38
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• 1998

미국의 증권시장에서는 EVA가 주요한 주자지표로 주목을 받고 있다. 그동안 주요 투자지표로 사용되던 EPS, ROA, ROE, PER 등의 회계적 이익지표들에 비해 EVA의 활용도가 점차 높아지고 있다. 우리 나라에서도 투자지표로서, 경영관리지표로서의 활용 가능성에 대해 관심이 증가하고 있다. 본 연구에서는 우리 나라 주식시장에서 EVA가 유용한 투자지표로 활용될 수 있는가를 살펴보고자 하였다. 1991년부터 1995년의 분석기간에 걸쳐 첫째, 주당EVA가 회계적 이익지표보다 주식수익률을 더 잘 설명하는가, 둘째, 주당EVA가 높은 기업이 더 높은 초과수익률을 실현하는가, 셋째, 주당EVA는 개별 종목 초과수익률의 선행지표로 활용될 수 있는가를 EPS, ROA, ROE, PER 등의 회계적 이익지표와 비교하여 분석하였다. 분석결과 첫째, 우리 나라 주식시장에서 주식수익률은 주당EVA보다 회계적 이익지표인 EPS, ROA, ROE가 더 잘 설명하는 것으로 나타났다. 둘째, EPS, ROA, ROE를 기준으로 포트폴리오를 구성하는 경우 유의적인 초과수익률을 획득할 수 있는 것으로 나타난다. 주방EVA를 기준으로 포트폴리오를 구성하는 경우에는 3월 이후에 포트폴리오간 유의적인 초과수익률 차이가 발생하여 초과수익률 획득이 가능한 것으로 나타났다. 셋째, 주당EVA, EPS, ROA 등은 초과수익률에 대해 동행적 투자지표로 유용하고, ROE는 동행적 지표와 선행적 지표로 모두 유용하고, PER는 선행지표로 유용한 것으로 나타났다. 이와 같은 분석결과는 우리 나라 주식시장에서 EVA는 회계적 이익지표인 EPS, ROA, ROE, PER보다 더 우월한 투자지표라고 말하기는 어렵지만, 회계적 이익지표와 보완적으로 활용하는 경우에는 유용한 투자지표로 활용될 수 있음을 나타내고 있다.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• 제37권1호
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• pp.1-16
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• 2009

In this paper, we introduce two-phase versions of RoeM and AUSMPW+ schemes. Both schemes are originally developed for the gas dynamic problems, and have shown superior accuracy, efficiency and robustness. A new shock discontinuity sensing term is derived from the mixture equation of state, which is commonly used in the RoeM and AUSMPW+ schemes for the stable numerical flux calculation. The developed two-phase versions of the schemes are applied to several liquid-gas, large property discrepancy two-phase test problems, including several shock stability test problems. The results show that both schemes maintain the merits exhibited in gas dynamic problems even in two-phase flows.

• Journal of Veterinary Clinics
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• 제31권1호
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• pp.6-10
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• 2014

Siberian Roe deer which inhabits Jeju Island is unique native species. Most of all the roe deer infect a lot of ticks, which can affect its population directly and can act as a vector to spread vector-borne diseases. The purposes of this study were to identify the ticks and detect the piroplamsosis on the roe deer in Jeju island. We collected ticks and blood samples in 23 roe deer rescued and treated at the Jeju Wildlife Rescue Center. As a result, we identified the one species of ticks, Haemaphysalis longicornis in roe deer and detected the closely related to Theileria luwenshuni in all blood samples (100%) and 8 pooled ticks (34.8%). These results indicate that there may be a high prevalence particularly of T. luwenshuni infection in Jeju wild roe deer and H. longicornis is a major vector of these diseases. It suggested that Jeju roe deer may act as reservoirs for these zoonotic pathogens.

• Culinary science and hospitality research
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• 제24권1호
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• pp.130-139
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• 2018

The purpose of this study was to grasp the profitability of coffee franchise companies using ROIC tree, ROA and ROE. As a result, ROA was using assets efficiently, and some companies are in desperate need to improve their management based on past brand recognition, and a new paradigm management strategy is urgently required. In particular, the franchise company's current cost burden is greater than comparable firms. In ROE, the capital was operating efficiently. Since ROIC is very difficult to classify business related and operating related amounts accurately based on financial statement information, there is a limit to accurate ROIC calculation. Therefore, ROIC is estimated to be 7.6~38.29% as of 2016 based on ROIC calculation. In the case of continuous growth companies, investments are made to improve steady sales, but some companies seem to be unable to escape from past paradigm. In order to continue the growth of the company beyond the accounting profit in the future, the ROIC Tree can be used to measure the subdivided management performance and propose efficiency plan.

• Food Science and Preservation
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• 제24권4호
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• pp.542-549
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• 2017

In this study, a peptide exhibiting antioxidant activity was isolated from sandfish (Arctoscopus japonicus) roe hydrolysate (SRH) in order to evaluate their practical uses as materials for manufacturing functional foods. The A. japonicus roe protein was hydrolyzed using Collupulin MG, and isolation of antioxidant peptide was performed using ultrafiltration (UF), prep-HPLC, and RP-HPLC. The SRH with a molecular weight below 3 kDa constituted about 38% of the whole hydrolysate, and the fraction with a molecular weight below 3 kDa showed significantly greater antioxidant activity compared to the original SRH and other fractions. The isolation fold of the antioxidant peptide isolated from SRH throughout the four-step procedure was 7.11-fold, and protein yield was 14.8%. The DPPH radical scavenging activity of isolated antioxidant peptide was above 90% at a concentration of 1.0 mg/mL, which was similar to that of the Trolox at a concentration of 0.1 mg/mL. These results suggested that the antioxidant peptide derived from A. japonicus roe could be a useful additive for producing functional foods and protein supplements. However, it is necessary to perform further study the structural characteristics of this antioxidant peptide isolated from A. japonicus roe.