• 기술혁신연구
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• 제12권2호
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• pp.21-46
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• 2004

Focusing on a product, this paper reconstructs the concept of technological systems first introduced by Carlsson and Stankiewicz (1991). Based on the model and our earlier works, we compare the salient features of technological systems for computer numerically controlled (CNC) machine tools in Korea, Sweden, and the United States.. We also try to measure the performance of the systems in an international comparison. Major findings are as follows: (1) The length of 'learning period' for local (national) technological system is substantial, even though it is a catching-up case. (2) The key success factor of the technological system appears to be the connectivity among various actors or infrastructures, rather than just the existence or formation of those. (3) In three countries' experience, the government played an important role in the formation of each own technological system. (4) The performance of Korea's technological system for CNC machine tools during the past two decades(1981-97) seems to be better than that of Sweden and the U.S. Lastly, many policy implication are presented.

• 국제학술발표논문집
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• The 1th International Conference on Construction Engineering and Project Management
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• pp.719-724
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• 2005

It has been debating on the performance evaluation of professional construction management (PCM) services since its introduction to Taiwan's construction industry more than a decade ago. Several evaluation systems were proposed by previous researchers. However, there has no comparison study been conducted for the feasibility, effectiveness, and appropriateness of these systems to the performance management (PM) of practical PCM services. This paper is intended for this end to compare the existing PCM performance evaluation systems in Taiwan. A real world design/build (D/B) building project was selected for case study. The result of case study concludes and compares the pro's and con's of the three systems. At the end, it recommends strategies for selecting the most appropriate PCM performance evaluation for PCM services.

• 대한수학회논문집
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• 제37권3호
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• pp.839-849
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• 2022

In this paper we consider a condition on the Ricci curvature involving vector fields which enabled us to achieve new results for volume comparison and Laplacian comparison. These results in special case obtained with considering volume non-collapsing condition. Also, by applying this condition we get new results of volume comparison for almost Ricci solitons.

• 환경영향평가
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• 제19권6호
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• pp.563-571
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• 2010

In carrying out the prior review on environmental conditions for basic plan of public waters reclamation, the important item is review on conditions of location on prearranged reclaimed land. In this study, environmental assessment which needs careful consideration in the first stage of selecting location is presented by analyzing environmental impact assessment on public waters reclamation projects for about 10 years. The assessment index for alternative comparison is divided into two parts according to importance level. What is most important in alternative comparison is the comparison on direct influence due to reclamation. In other words, it figures out damaged extent of natural shoreline as well as intertidal and infralittoral zones. Comparing influence extent due to reclamation through the 1st comparison on this is regarded as to be important. In case there is no significant difference by alternatives through the 1st assessment, the 2nd assessment should be carried out. In the 2nd assessment indexes are damaged quantity of benthic organism, change in seawater current, erosion, accumulation and exchangeable rate of seawater. The plan for selecting optimal location which minimizes environmental influence in establishing public waters reclamation plan is demonstrated through model cases. For this, 3 districts which have similar environment and scale are selected, and then comparison on location alternative is made through environmental assessment index. In addition, the comparison on 3 arrangement alternatives are conducted, targeting certain areas. It is thought that carrying out comparison review on respective areas in the same cities and counties, not merely comparing arrangement plan by selecting 1 targeting area in advance, is the most appropriate. Besides, selection of arrangement plan considering environment, which minimizes damage of natural shoreline and influence due to change of seawater current is required in alternative comparison on arrangement plan as well. In case of the prior review on environmental conditions though alternative comparison method presented in this study is carried out, it is safely said that the influence on ocean environment due to public waters reclamation can be minimized.

• 혜화의학회지
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• 제15권2호
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• pp.1-7
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• 2006

Objectives : Comparison acupuncture treatment with Acupuncture & Moxibustion combined treatment for frozen shoulder 20 case patients Methods : Efficacy evaluation using Apley scratch test(ROM), Martin.A.N'Improvement rate Results : 1. Acupuncture & Moxibustion combined treatment group were better than acupuncture treatment group in Martin.A.N' Improvement rate. 2. Acupuncture & Moxibustion combined treatment group were better than acupuncture treatment group in Apley scratch test(ROM). but this study need to many case frozen shoulder investigation.

• Applied Biological Chemistry
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• 제20권3호
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• pp.270-278
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• 1977

In case of sensory evaluation with multi-samples and long-period, in spite of using method with good sensitivity, quality differences among samples could net be detected well because of panel's fatigue and tiredness. So new method to reduce panel's sense of psychological and physiological responsibility, "Trio Paired Comparison", is designed, and New Modified Scheffe's Method 2 as the statistical method for a test of "Trio Paired Comparison" is proposed. And also in this paper problems and countermeasures in applicating "Trio Paired Comparison" are considered.

• 산업경영시스템학회지
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• 제28권1호
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• pp.84-91
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• 2005

Recently comparison-shopping agent systems are promising to support purchase of buyers in online-shopping environment. This paper proposes a comparison-shopping agent system considered easy access and buyer's preference. Easy access is achieved by minimizing questions to buyer. Buyer's preference is considered by using pairwise comparison of products attributes. Procedure of the proposed system is explained with a case of notebook. Finally a prototype has been implemented.

• 한국환경과학회지
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• 제21권8호
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• pp.1023-1030
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• 2012

Contents of ginsenosides 7 subordinations of two-year ginseng (fresh ginseng) is 1.27% and three-year ginseng is 2.09%, so the three-year ginseng root increased 64.9% compared to the two-year root. Compared with the comparison group, ginsenosides component content of KEM+SAF-applied group increased 24% in case of the two-year root and 20% in case of the three-year root. In vitamin C content, two-year root showed 59.4% higher and three-year root showed 37.7% higher in KEM+SAF applied group compared with the comparison group. In case of vitamin E, the two-year root indicated 5.6% higher and three-year root indicated 1.5% higher in KEM+SAF applied group compared with the comparison group, but there is no significant difference. In phytosterol three components (campesterol, stigmasterol, sitosterol), two-year root showed 25.3, 3.6, 14.1% higher for each, and three-year root showed 23.6, 6.8, 12.9% higher in KEM+SAF applied group and 14.4% was higher on average. In DPPH, two-year root indicated 34.4% higher and three-year root indicated 42.4% higher in KEM+SAF applied group compared to the comparison group. To sum up the results, KEM+SAF applied group showed (1)22% ginsenosides components content, (2)48.6% vitamin C content, (3)3.6% vitamin E content, (4)14.4% phytosterol content, (5)38.4% DPPH higher averagely compared to the comparison group.

• 한국항공우주학회지
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• 제45권3호
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• pp.252-258
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• 2017

본 논문에서는 현재 한국항공우주학회 공기역학부문위원회에서 주관하고 있는 EFD-CFD 비교워크샵의 여러 과제 중 CASE 3 천음속영역 유동해석에 대해 소개하고 현재까지 참여한 기관들의 결과를 서로 비교하였다. 현재까지 이 과제에 대하여 산학연 8개 기관이 참가하였고, 그 결과 풍동실험결과와 비교적 잘 일치하며, 서로의 해석결과 역시 잘 일치함을 알 수 있었다.

• 수산해양기술연구
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• 제24권1호
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• pp.22-29
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• 1988

실제로 어선에서 사용하고 있는 외끌이 기선저인망어구를 표본 조사하여 Tauti의 비교법칙에 따라 1/35 크기로 축소하여 제작한 그물과 이 그물어구의 천장망과 얾은장에 범포를 부착한 모형그물을 써서 유속의 변화와 얾은장 끝의 전개간격의 변화에 따른 유체저항, 망고 및 망폭을 측정한 결과를 요약하면 다음과 같다. 1. 유체저항은 모형그물에 비해 천장망에 범포를 부착한 그물에서 최대 30% 증가하였고, 얾은장에 범포를 부착한 그물에서 35%증가하였다. 2. 망고는 모형그물에 비해 천장망에 범포를 부착한 그물에서 최대 12% 증가 하였고, 얾은장에 범포를 부착한 그물에서 최대 5.8%감소하였다. 3. 망폭은 모형그물에 비해 천장망에 범포를 부착한 그물에서 최대 4% 감소하였고, 얾은장에 범포를 부착한 그물에서 최대 8.4% 증가하였다. 4. 망구투영면적은 모형그물에 비해 천장망에 범포를 부착한 그물에서 최대 13.6% 증가하였고, 얾은장에 범포를 부착한 그물에서 최대 11.8% 증가하였다.