• 산업경영시스템학회지
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• 제17권31호
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• pp.99-114
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• 1994

The introduction of new equipments to strengthen the competitiveness of enterprises is one of pretty important factors. Enterprises introducing new equipments strengthen competitiveness through productivity increasing, high quality maintenance, inventory reduction, improved design and production interface, simple scheduling process, low scrap rate, rework reduction, etc. Managers will work out the best equipment-replacing strategy through the appropriate combination of potential cost attributes and qualitative attributes difficult to quantify in accordance with the business purpose. This study is to present a method to select an equipment-replacing alternative through the decision-making model of Analytic Hierarchy Process in consideration of the differences of cost flow of the alternatives, taking into consideration tangible attributes and strategic intangible attributes.

• 경영과학
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• 제26권2호
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• pp.37-59
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• 2009

Electronic brainstorming (EBS) to improve the process and outcomes of group decision making is an artifact of Information Systems legacy. Despite three decades of research with EBS in an effort to become a key resource of organizational performance, its performance when compared to that of nominal is inconclusive because of the recent debate over its usefulness in terms of productivity. Subsequent researchers have directed our attention to the re-examination of cognitive stimulation, which is considered the major benefit in computer-based idea generation, to explain the performance singularity in computer-based groups. While both cognitive and motivational factors that moderate and mediate the group-interaction process remain unexplored, individual differences that are tightly linked to creative behavior have been largely ignored to account for the discrepancy in performance. Since simulations have been widely used in situations where an outcome does not meet the assumptions, the notion of a group simulator and detailed simulation mechanisms are introduced to examine the potential effects of individual differences on the performance of computer-based idea generation groups. In addition, two prior studies that empirically explored cognitive mechanisms with the group simulator are showcased along with six propositions to initiate future research.

• 통상정보연구
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• 제10권2호
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• pp.349-369
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• 2008

The purpose of this study was to investigate the impact of the performance of small and medium companies located in Chungbuk according to their export ratio. First, there were significant the differences in those companies' performance depending on their export ratio. Such variables as operating incomes, current ratio, R&D, and the number of employees showed differences when those companies were divided into two groups whose export ratio were less than and more than 10%. Second, the impact of determinants which consisted of the size of total assets, R&D, advertisement, and export ratio on those companies' performance which consisted of profitability, stability, productivity, growth, liquidity, and activity was analyzed.

• 대한약침학회지
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• 제7권2호
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• pp.43-56
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• 2004

Objectives : In order to investigate effects and immune improvement of distilled red-ginseng herbal Acupuncture, expression of Cox-1, Cox-2, and mRNA of Bcl-2 and Bax were analyzed in A549 cell in vivo. Survival time and expression of cytokine mRNA were measured for the mice with Sarcoma-180 induced abdominal cancer. Methods : Balb/c mouse was treated with distilled red-ginseng Herbal Acupuncture at Wisu($BL_{21}$) and Chung- wan($CV_{12}$) to investigate anti-cancer effects and immune response. Results : 1. For expression of mRNA of Cox-1 using RT-PCR, the control group and the experiment groups didn't show significant differences. For Cox-2, both experiment groups and the normal group showed significant differences. 2. For expression of mRNA of Bcl-2 using RT-PCR, experiment groups showed slight decrease compared to the control group. For Bax, no significant changes were shown between the control group and experiment groups. 3. For survival time, all of experiment groups showed 11.1% increase compared to the control group. 4. For IL-2 and IL-4 productivity using Flow cytometry, all of experiment groups didn't show any significance. 5. For IL-2 productivity using ELISA, all of experiment groups didn't show any significance. 6. For expression of cytokine mRNA using RT-PCR, significant increase of IL.-2 and IL-4 were witnessed in the experiment group II compared to the control group. Significant increase of IL-10 was shown in all off experiment groups compared to the control group. Conclusion : According to the results, we can expect that distilled red-ginseng Herbal Acupuncture may be further effccts in anti-cancer and immune improvement if increasing concentration.

• 한국환경복원기술학회지
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• 제18권4호
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• pp.15-27
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• 2015

The objectives of this study are to analyze the quantitative ecological principal components of Korean Peninsula using the multivariate spatial environmental datasets and to compare the ecological difference between South and North Korea. Ecological maps with GIS(Geographical Information System) are constructed by PCA(Principal Component Analysis) based on seventeen raster(cell based) variables at 1km resolution. Ecological differences between South and North Korea are extracted by Factor Analysis using ecosystem maps masked from Korean ones. Spatial data include SRTM(Shuttle Radar Topography Mission), Temperature, Precipitation, SWC(Soil Water Content), fPAR(Fraction of Photosynthetically Active Radiation) representing for a productivity, and SR(Solar Radiation), which all cover Korean peninsula. When it performed PCA, the first three scores were assigned to red, green, and blue color. This color triplet indicates the relative mixture of the seventeen environmental conditions inside each ecological region. The first red one represents for 'physiographic conditions' worked by high elevation and solar radiation and low temperature. The second green one stands for 'seasonality' caused by seasonal variations of temperature, precipitation, and productivity. The third blue one means 'wetness condition' worked by high value such as precipitation and soil water contents. FA extraction shows that South Korea has relatively warm and humid ecosystem affected by high temperature, precipitation, and soil water contents whereas North Korea has relatively cold and dry ecosystem due to the high elevation, low temperature and precipitation. Results would be useful at environmental planning on inaccessible land of North Korea.

• 한국초지조사료학회지
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• 제12권3호
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• pp.185-192
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• 1992

This experiment was conducted to compare the productivity of five silage corn varieties. Corn varieties were Pioneer 3144(P 3144), 3160(P 3160), 3282(P 3282), 3352(P 3352) and Suweon 19(S 19) and were seeded on May 2 and harvested on August 15. Ratios of stalk, leaf and ear, chemical composition and yields of nutrients were investigated in respective corn part. Experimental design was accepted by Latin square arrangement with five replicates and each plot had twenty two plants. The results obtained were as follows: 1. Crude portein, crude ash and nitrogen free extract(NFE) contents of whole plant ranged from 6.32 to 7.18%, 5.16 to 7.43% and 52.62 to 57.90%, respectively, and there were no significant(P>.Ol) differences between varieties. Crude protein and NFE content were the highest in ear between corn parts. 2. Crude fiber conent of whole plant ranged from 18.98 % to 24.01 %, and was the highest in suweon 19 and the lowest in P 3352(P<.01). Crude fiber content was the highest in stem and the lowest in ear, However, crude fat content(2.03-3.66 %) vice versa. 3. Yields of organic matter, crude protein, crude fat, NFE and TDN per 10a were the greatest(P< .01) in P 3282, however crude fiber yield was the highest(P<.Ol) in P 3352. 4. Ratios of different part to total dry matter yield ranged from 12.7 %(P 3352) to 17.8 %(P 3160) for leaf, 44.5(P 3352) to 66.9 %(P 3160) for stem and husks, and 16.9 %(P 3282) to 42.8 %(P 3352) for ear, and there were significant differences between corn varieties(P<.Ol). Consequently, P 3352 has the greatest nutrient yields, particularly by ear, and P 3282 has a great nutrient yield by stem. This result suggested that could be appear a better character of silage corn by hybridization of this two corn varieties.

• 한국산학기술학회논문지
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• 제9권2호
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• pp.415-421
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• 2008

정보의 복잡도와 다양성의 증가뿐만 아니라 현재 이용 가능한 대용량의 정보로 인해 온톨로지에 대한 관심이 증가하고 있다. 이러한 경향은 전통적으로 수동으로 수행되던 많은 활동의 자동화에 대한 관심도 증가시켰다. 본 논문에서는 복잡한 OWL 온톨로지를 UML 클래스 다이어그램을 이용해서 개발하고 표현함으로써 생산성과 명료함을 향상시키기 위한 연구를 수행한다. UML은 대부분의 온톨로지 언어에서 일반적으로 이용할 수 없는 프로파일, 대역 모듈성, 확장 메커니즘 등의 많은 특징을 갖고, 온톨로지 언어는 UML이 지원하지 않는 일부 특징을 갖는다. 본 논문에서는 UML과 온톨로지 언어 RDF, OWL 사이의 유사성과 차이점을 확인하고, 상당히 문제가 있는 차이점을 다루기 위해 UML 메타 모델의 변경을 제안한다.

• 한국산학기술학회논문지
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• 제15권7호
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• pp.4618-4625
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• 2014

본 연구의 목적은 Railway BIM (Building Information Modeling)기반 PLM (Product Lifecycle Management)(R-PLM) 기술을 개발할 때 고려해야 할 사항을 도출하고 개발 방향을 제시하는 것이다. 철도 분야는 구성요소들이 객체지향적으로 모델링되고 전 생애주기가 효과적으로 관리된다면 공학건설 생산성을 극대화할 수 있다. 이 두 가지 기술은 각각 BIM, PLM 기술로 널리 알려져 있다. 연구 목적을 얻기 위해 국내 PLM과 BIM 전문가 자문을 통하여 R-PLM 기능을 명확히 정의하고 기대효과와 장애요인에 대하여 3차에 걸쳐 인터뷰를 수행하였다. 회수된 결과를 통계적으로 분석하여 분야, 경력에 따른 각 항목들의 시각 차이를 확인하고 유의미한 수준에서 우선순위를 도출하였다. 이 결과를 바탕으로 R-PLM 기술 개발을 위한 고려사항을 제안한다.

• The Journal of Asian Finance, Economics and Business
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• 제7권12호
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• pp.853-861
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• 2020

The study aims to measure the productivity of the Saudi banking sector at the retail level using secondary data for 11 local banks from the period 2015-2019. The study uses an extended version of the Cobb-Douglas production function to account for the fact that as banks openup more retail branches, they will need to employ more labor. The extended Cobb-Douglas production function was estimated using the two-way fixed effect model to account for unobserved heterogeneity across Saudi banks resulting from differences in labor competencies and leadership style. Besides, the model accounts for unobserved heterogeneity among Saudi banks due to the advancement in electronic services over time. The results showed that labor, branches, customers' deposits, and fixed deposits have a positive effect on the total value of generated loans. Conversely, ATM has an insignificant effect on generated loans. The average scale elasticity shows that the Saudi banks at the retail level are operating under decreasing returns to scale. The average marginal rate of technical substitution shows that Saudi banks need at least one ATM to replace one unit of labor at the retail level while keeping the same level of output.

• Journal of Plant Biotechnology
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• 제36권4호
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• pp.309-319
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• 2009

Transgenic plant cell cultures for the production of biopharmaceuticals including monoclonal antibodies, recombinant proteins have been regarded as an alternative platform in addition to traditional microbial fermentation and mammalian cell cultures. Plant-made pharmaceuticals (PMPs) have several advantages such as safety, cost-effectiveness, scalability and possibility of complex post-translational modifications. Increasing demand for the quantity and diversity of pharmaceutical proteins may accelerate the industrialization of PMP technology. Up to date, there is no plant-made recombinant protein approved by USFDA (Food and Drug Administration) for human therapeutic uses due to the technological bottlenecks of low expression level and slight differences in glycosylation. Regarding expression levels, it is possible to improve the productivity by using stronger promoter and optimizing culture processes. In terms of glycosylation, humanization has been attempted in many ways to reduce immune responses and to enhance the efficacy as well as stability. In this review article, all these respects of transgenic plant cell cultures were summarized. In addition, we also discuss the general characteristics of plant cell suspension cultures related with bioreactor design and operation to achieve high productivity in large scale which could be a key to successful commercialization of PMPs.