• Title/Summary/Keyword: Effective competition

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Competition and Host-strain Interaction of Soybean Rhizobium Strains on Two Soybean Cultivars (콩 근류균계간 경합과 숙주 친화성의 품종간 차이)

  • 박의호;싱글톤폴
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.41 no.6
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    • pp.718-724
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    • 1996
  • Two soybean cultivars, ‘Lee’ and ‘Peking’, were used to evaluate the competition and interaction of rhizobium strains PRC205 (R. fredii, fast-grower) and USDA110 (B. japonicum, slow-grower). Strains were inoculated separately on the root parts of a split-root growth system. Both root sides were inoculated simultaneously with four combinations of strain treatment to evaluate the competition of strains. And to evaluate the interaction of strains one side of split-root system was inoculated a week prior to the other side. Nodule mass and dry weight of the plants were measured 3 weeks after treatments. PRC205 showed no effective nodulation and no competing ability with USDA110 on Lee cultivar, however, contrary results on Peking cultivar. Top dry weight of Lee inoculated with PRC205 was much lower than that of any other inoculation treatments, however, in Peking that with PRC205 was higher than that with USDA110. There were no differences in root dry weight among the inoculation treatments. USDA110 used as primary inoculant suppressed nodule mass of opposite side, secondary inoculant, severely in both cultivars. PRC205 showed same tendency as USDA110 in Peking, but revealed little suppression effects on USDA110 used as secondary inoculant in Lee. USDA110 used as primary inoculant in Lee and PRC205 in Peking showed much more dry weight of soybean plants than that of other treatments.

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A Study for BIM based Evaluation and Process for Architectural Design Competition -Case Study of Domestic and International BIM-based Competition (BIM기반의 건축설계경기 평가 및 절차에 관한 연구 -국내외 BIM기반 건축설계경기 사례를 기반으로-)

  • Park, Seung-Hwa;Hong, Chang-Hee
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.18 no.2
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    • pp.23-30
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    • 2017
  • In the AEC(Architecture, Engineering and Construction) industry, BIM(Building Information Modeling) technology not only helps design intent efficiently, but also realizes an object-oriented design including building's life cycle information. Thus it can manage all data created in each building stage and the roles of BIM are greatly expanded. Contractors and designers have been trying to adopt BIM to design competitions and validate it for the best result in various aspects. Via the computational simulation which differs from the existing process, effective evaluation can be done. For this process, a modeling guideline for each kind of BIM tool and a validation system for the confidential assessment are required. This paper explains a new process about design evaluation methods and process using BIM technologies which follow the new paradigm in construction industry through complement points by an example of a competition activity of the Korea Power Exchange(KPX) headquarter office. In conclusion, this paper provides a basic data input guideline based on open BIM for automatic assessment and interoperability between different BIM systems and suggests a practical usage of the rule-based Model Checker.

Effects of Knowledge-based Startups on Employment Growth (지식기반산업 창업기업의 고용창출 효과)

  • Lee, Jeong Hyun;Lee, Hee Yeon
    • Journal of the Economic Geographical Society of Korea
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    • v.20 no.2
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    • pp.137-157
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    • 2017
  • As unemployment rises and economic growth slows, interest in startups, which is considered to be the driving force of job creation, is increasing. This study aimed to analyze the employment effects of knowledge-based startups in South Korea. In particular, startups were divided into three categories (knowledge-based manufacturing, knowledge-based service, and other industries) and the region were divided into the capital region and the other regions. The result of the analysis, which used census on Establishments Data from Statistics Korea(KOSIS), showed that the employment effects of startups change in three steps over time. When new firms were created, employment increases instantly. However, as the competition among firms increases, some firms exit the market and employment decreases. In the long-term, some firms will survive the market competition and increase their firm size and the number of jobs they offer. The total employment effect was greater for knowledge-based startups than the other industries startups. The total employment effect of knowledge-based startups are 2.84%p for the period of 6 years. Startups in the Capital region showed higher employment effect than startups in other regions. This implies that in the capital region, employment increases more after the startups are created, but due to fierce competition, employment also decreases relatively more than it does in other regions. However, companies that survive competition create more employment. This study may give some policy implications that startup policies should be tailored to the startup's type and regional characteristics in order to achieve more effective job creation performance.

Dual-frequency Capacitively Coupled Plasma-enhanced Chemical Vapor Deposition System for Solar Cell Manufacturing

  • Gwon, Hyeong-Cheol;Won, Im-Hui;Sin, Hyeon-Guk;Rehman, Aman-Ur;Lee, Jae-Gu
    • Proceedings of the Korean Vacuum Society Conference
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    • 2011.08a
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    • pp.310-311
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    • 2011
  • Dual-frequency (DF) capacitively coupled plasmas (CCP) are used to separately control the mean ion energy and flux at the electrodes [1]. This separate control in capacitively coupled radio frequency discharges is one of the most important issues for various applications of plasma processing. For instance, in the Plasma Enhanced Chemical Vapor Deposition processes such as used for solar cell manufacturing, this separate control is most relevant. It principally allows to increase the ion flux for high deposition rates, while the mean ion energy is kept constant at low values to prevent highly energetic ion bombardment of the substrate to avoid unwanted damage of the surface structure. DF CCP can be analyzed in a fashion similar to single-frequency (SF) driven with effective parameters [2]. It means that DF CCP can be converted into SF CCP with effective parameters such as effective frequency and effective current density. In this study, comparison of DF CCP and its converted effective SF CCP is carried out through particle-in-cell/Monte Carlo (PIC-MCC) simulations. The PIC-MCC simulation shows that DF CCP and its converted effective SF CCP have almost the same plasma characteristics. In DF CCP, the negative resistance arises from the competition of the effective current and the effective frequency [2]. As the high-frequency current increases, the square of the effective frequency increases more than the effective current does. As a result, the effective voltage decreases with the effective current and it leads to an increase of the ion flux and a decrease of the mean ion energy. Because of that, the negative resistance regime can be called the preferable regime for solar cell manufacturing. In this preferable regime, comparison of DF (13.56+100 or 200 MHz) CCP and SF (60 MHz) CCP with the same effective current density is carried out. At the lower effective current density (or at the lower plasma density), the mean ion energy of SF CCP is lower than that of DF CCP. At the higher effective current density (or at the higher plasma density), however, the mean ion energy is lower than that of SF CCP. In this case, using DF CCP is better than SF CCP for solar cell manufacturing processes.

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The Study about Parody Effect on Print Ad. (인쇄매체광고의 패러디효과에 관한 연구)

  • 김규철;조경섭
    • Archives of design research
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    • v.15 no.4
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    • pp.231-242
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    • 2002
  • Due to the various reasons reducing the advertising effects in such as message reliability declining, target segmentation, and information technology, creative becomes more important than ever before. And this is more true in print advertising than electronic ones. The purpose of this study is to support to develop more effective advertisement in print advertising. Parody advertising, a postmodernic technique, effectiveness was tested empirically. Top-of-mind awareness, reliability toward advertising, attitude toward advertising, attitude toward brand, and purchase intention were adapted as a scale to measure the effectiveness of parody and non-parody advertising. Result proved the parody advertising shows higher effects than non-parody one. Conclusively saying that parody could be one of the possible ways to increase effects on print advertising to survive from the heavy competition and low attention.

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A case study of education game - In the case of Jumbini 2 (mountain rescue operations) (교육용게임의 적용 사례 분석 - 줌비니2(산악구출작전)을 중심으로)

  • Lee, Jong-Ho;Lee, Dong-Lyeor;Lee, Wan-Bok;Ryu, Seuc-Ho;Kyung, Byung Pyo
    • Journal of Digital Convergence
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    • v.11 no.4
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    • pp.459-465
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    • 2013
  • In this study, an educational game named "Jumbini 2: Mountain Rescue Operation" is compared and analyzed as a case of highly effective educational as well as significant popular game. In order to develop effective game software for education, stories and structure elements of the game are examined. Significant results are found on aspects of value and effect as an educational game, analyzing based on goal, rule, competition, challenge, fantasy, safety and fun, which are general elements for educational games.

Learning Graphical Models for DNA Chip Data Mining

  • Zhang, Byoung-Tak
    • Proceedings of the Korean Society for Bioinformatics Conference
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    • 2000.11a
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    • pp.59-60
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    • 2000
  • The past few years have seen a dramatic increase in gene expression data on the basis of DNA microarrays or DNA chips. Going beyond a generic view on the genome, microarray data are able to distinguish between gene populations in different tissues of the same organism and in different states of cells belonging to the same tissue. This affords a cell-wide view of the metabolic and regulatory processes under different conditions, building an effective basis for new diagnoses and therapies of diseases. In this talk we present machine learning techniques for effective mining of DNA microarray data. A brief introduction to the research field of machine learning from the computer science and artificial intelligence point of view is followed by a review of recently-developed learning algorithms applied to the analysis of DNA chip gene expression data. Emphasis is put on graphical models, such as Bayesian networks, latent variable models, and generative topographic mapping. Finally, we report on our own results of applying these learning methods to two important problems: the identification of cell cycle-regulated genes and the discovery of cancer classes by gene expression monitoring. The data sets are provided by the competition CAMDA-2000, the Critical Assessment of Techniques for Microarray Data Mining.

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The definition, problems and policy direction of structure reform in Korean coastal and offshore fisheries. (연근해어업 구조개선의 의의, 문제점과 추진 방향)

  • 신영태
    • The Journal of Fisheries Business Administration
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    • v.30 no.2
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    • pp.39-54
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    • 1999
  • This paper focused on meaning, problems and prospect of structural reform of coastal and offshore fisheries in Korea. Structural reform can be defined as effective combination of production factors in order to enhance fisheries productivity and it can be realized mainly through fleet reduction, modernization of fishing vessels and fishing gear etc. However, the structural reform alone will not be sufficient to advance Koreanl fisheries facing with severe challenges from both inside and outside. Domestically, worsening status of fisheries resources, decreasing number of fishermen, worsening financial status of fisheries businesses and severe competition cause structural problem in fisheries sector and internationally the pressure from WTO and OECD to reduce tariff and subsides in fisheries poses severe challenges. The structural reform should be carried out in relation with the general adjustment programs across coastal and offshore fisheries such as M&A among fisheries businesses, adjustment of number of fishing permits and fishing areas. And the policy to enhance the fishing productivity is needed for recovery of fisheries resources and for the reduction of fishing efforts, that is, the approach which combines economic and resources concerns is needed. For the effective implementation of the reform, effect analysis of the reform program is needed and at the same time, eradication of illegal fishing, reduction of fishing fleet and reduction of fishing cost should be realized. However, the most important thing is the will and efforts of the government for successful reform. If the government does not exert sufficient efforts for the structural reform, Korea could be degraded into a backward country in fisheries.

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Practical Issues of Earned Value Management Systems (EVMS) for Nuclear Power Plant (NPP) Construction

  • Jung, Youngsoo;Kim, Sungrae;Moon, Byeong-Suk
    • International conference on construction engineering and project management
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    • 2015.10a
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    • pp.696-697
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    • 2015
  • Cost, schedule, and quality are the three major performance indicators for any construction project. Under the globalized competition in the nuclear industry, researchers and practitioners have also explored a systemized and integrated management system for cost, schedule, and quality. In order to address this issue, the concept of earned value management system (EVMS) has been often utilized. However, implementing EVMS for a mega-project of nuclear power plant (NPP) construction requires extensive overhead efforts. Though previous studies proposed structures and methods for effective NPP EVMS, there has been no legitimate study for data collection strategy for practical implementation. In this context, the purpose of this paper is to develop an effective data collection strategy for NPP EVMS. Firstly, the barriers to practical NPP EVMS were identified based on literature review and expert interviews. Strategies for data collection were then developed based on different phases of project life cycle. This study focuses on the 'life-cycle integrated progress management system' for NPP construction from an owner's perspective Therefore, results of this study can be used as a guide for preparing request for proposals (RFP) of an NPP owner organization.

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Research on the Suitability of Nuclear Sharing Strategy of South Korea through the Nuclear Strategy of U.S. NPR

  • Dong-Kwon Cho;Sin-Young Yu;Sung-Gil Kim
    • Journal of Radiation Industry
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    • v.17 no.4
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    • pp.451-456
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    • 2023
  • The subject of this research is what is the most effective strategy of the nuclear sharing strategy of South Korea through the nuclear strategy that the U.S. is pursuing now. The U.S. Nuclear Strategy-related change can be found in a Nuclear Posture Review (NPR) report released by the U.S. The first NPR was announced in 1994 and after that, the U.S. has additionally announced a total of four NPRs along with administration changes. The change in the U.S. nuclear strategy and nuclear power are considered both deterrence and offset strategies. It can be summarized in two ways. First, by maintaining overwhelming nuclear power against the enemy, the U.S. is to lead nuclear advantage that is the core of the U.S. nuclear strategy. Second, the U.S. is to limit the competition of nuclear power with nations seeking to challenge the U.S. nuclear power advantage. Additionally, the U.S. is to actively sign an agreement with nations on the reduction and restriction of nuclear weapons. Through the NPR of the U.S., South Korea should know its unclear power and strategy and have an effective nuclear strategy of South Korea. Therefore, this research is to deal with the suitability of the nuclear sharing strategy with the U.S., which is one of the various nuclear strategies of South Korea.