• Title/Summary/Keyword: sigma factor

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Controlling Factors for Productivity Improvement in Process of Plastic Injection Molding (플라스틱사출성형공정에서의생산성향상을위한제어인자들에관한연구)

  • Kim, Ki-Sun;Ree, Sang-Bok
    • Proceedings of the Korean Society for Quality Management Conference
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    • 2010.04a
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    • pp.62-66
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    • 2010
  • Company which produce the latest plastic products of survival dimension for competitive power security productivity elevation activity hard do. But enterprises is lacking value elevation activity that customer among product special quality is thinking heftily and isn't grasping well adjusted impact factors. So, addition quality failure cost is produced. In this research, investigated impact factor and factors influencing most heftily in quality for productivity elevation. As a result, present example that serve to control well importance benevolence.

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Production and Characterization of Monoclonal Antibodies to Yeast Mitochondrial RNA Polymerase Specificity Factor

  • Lee, Chang-Hwan;Jang, Sei-Heon
    • BMB Reports
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    • v.31 no.6
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    • pp.607-610
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    • 1998
  • Transcription of mitochondrial DNA in the yeast S. cerevisiae depends on recognition of a consensus nonanucleotide promoter sequence by mitochondrial RNA polymerase specificity factor, which is a 43 kDa polypeptide encoded by the nuclear MTF1 gene. Mtf1p has only limited amino acid sequence homology to bacterial sigma factors, but functions in many ways like sigma in that it is required for promoter recognition and initiation of transcription. To analyze the corebinding region of Mtf1p, monoclonal antibodies to this protein were prepared. Recombinant Mtf1p overproduced in E. coli was purified to near homogeneity and used to raise monoclonal antibodies (mAbs). From fused cells screened for Mtf1p mAbs by immunodot blot analysis, 19 positive clones were initially isolated. Further analysis of positive clones by Western blotting resulted in 4 mAbs of Mtf1p.

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Analysis of Surface Crack under Tension and Bending Stress in Plate (인장과 굽힘응력을 받는 판재의 표면균열해석)

  • 오환섭;박철희;허민구
    • Transactions of the Korean Society of Automotive Engineers
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    • v.6 no.4
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    • pp.121-128
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    • 1998
  • In this study, when tension and bending stress act on plate simultaneously, stress intensity factor is analyzed at crack tip with using BEM(Boundary Element Method). In this analysis, stress intensity factors(S.I.F) are defined for variable ligament, aspect and stress ratio($\sigma$T/$\sigma$B). Consequently, predicted that crack grow to depth direction at low aspect and ligament ratio in tension stress and to surface direction in bending stress. Tension and bending stress act on plate same time, effect of tension stress in the first stage and effect of bending stress in the after stage was to observed. The outbreak of secondary crack in backside is under the control of stress amplitude and predict that the point of outbreak is mear backside.

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Management Innovation of Real Estate Business using Six Sigma Methodology: Strategy Planning and Critical Success Factors (6 시그마 방법론을 활용한 부동산업 경영혁신: 전략수립과 핵심성공요소 도출을 중심으로)

  • Lee Young Suk;Park Sung Hyun;Cho Byung-Jun
    • Journal of Korean Society for Quality Management
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    • v.32 no.3
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    • pp.216-233
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    • 2004
  • The real estate management includes not only the brokerage, property management, development, investment and consulting which are related to real estate handling, but also the human resources who deal with the real estate business. The level of management quality of Korean real estate business is rather poor. This paper deals with management innovation of real estate management using Six Sigma methodology The main focus of this Paper is to develop strategy Planning, and is to select critical success factors for each strategy to make an advanced management system for real estate business. This paper is a case study, and the target company for this innovation is ERA-Korea Company. Seven strategies are proposed, and for each strategy several critical success factors are suggested. Through this case study, the authors hope that a management quality model for real estate business is proposed, and an improved management method can be adopted in the other real estate companies.

Use of .lambda.gt 11 and antibody probes to isolate genes encoding RNA polymerase subunits from bacillus subtilis

  • Suh, Joo-Won;Price, Chester
    • The Microorganisms and Industry
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    • v.14 no.1
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    • pp.17-20
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    • 1988
  • A genetic analysis of the complex Bacillus subtilis transcriptional apparatus is essential to understand the function, regulation, and interaction of the transcriptase components during growth and sporulation. This approach in Escherichia coli has uncovered fundamental mechanisms regulating gene expression Cole and Nomura, 1986; Lindahl and Zengel, 1986) and an analysis of the B. subtilis transcriptase will allow comoparison of the E.coli system to another bacterium that has evolved under different selective pressures. To this end we used antibody probes to isolate the alpha, beta, and beta' core subunit genes from a .lambda.gtill expression vector library. To address the question of function ans regulation of the minor sigma factors that confer promoter specifity on the polymerase core (Losick et al., 1986), we used the same approach to isolate the gene for the 37,000 dalton sigma factor, sigma-37.

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Considerations of the Small-Crack Growth Law Based on COD (CRACK 개구변위(開口變位)에 기초한 미소피로(微小疲勞)크랙 전파법칙(法則)의 고찰(考察))

  • Kim, Min-Gun;Ji, Jueng-Keun
    • Journal of Industrial Technology
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    • v.13
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    • pp.49-57
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    • 1993
  • Bending fatigue tests were carried out on the specimenes with two different strength levels in order to investigate small crack growth rate. The main results obtained are as follows : (1) Small crack growth law, $da/dn=C{\sigma}_a{^n}a$ is useful several materials, but is not the rule applicable to all cases generally. (2) When da/dn in several specimens are equal, COD near the crack tip are also nearly equal. (3) Crack tip opening displacement(CTOD) is the main factor to control the small crack growth rate, and da/dn ${\propto}$ CTOD comes into being between the two. Accordingly, $da/dn=C({\sigma}_a{^2}/{\sigma}_s){^n}a^n$ shows the small crack growth rate being reflected crack closure phenomenon.

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A Study on The Determinants of New Product Development Performance (신제품개발성과에 영향을 미치는 요인연구)

  • Lee, Kwang-Soo;Ree, Min-Ho;Ree, Sang-Bok
    • Proceedings of the Korean Society for Quality Management Conference
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    • 2010.04a
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    • pp.310-320
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    • 2010
  • In this study, factors affecting the development of new products and research about the relevance of the factors based on the research model was configured. Existing research and technology commercialization process of discrimination that occur in the importance of risk management and open innovation company's competitive advantage in new product development and affect the reporter know what the effect is used as a control variable effects. Factor in the development of new products through research and innovation capacity and knowledge management activities, the introduction of open innovation and enterprise level ever due to the level of risk management controls and the need for effective research to study the model was proposed.

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Proteomic Analysis of Osmotic Stress Response in Streptomyces coelicolor A3(2) Using 2-Dimentional Gel Electrophoresis and MALDI-TOF Mass Spectrometry

  • Cha, Chang-Jun;Lee, Eun-Jin;Roe, Jung-Rye
    • Proceedings of the Korean Biophysical Society Conference
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    • 2002.06b
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    • pp.55-55
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    • 2002
  • An alternative sigma factor as encoded by the $\sigma$$\^$B/ gene in Streptomyces coelicolor A3(2) was known to be involved in the differentiation and osmotic stress response. Protein expression profiles of wild-type and a $\sigma$$\^$B/ mutant strain of S coelicolor A3(2), which is impaired in defense against osmotic stress, were compared in the absence and presence of osmotic stress, using 2-dimentional gel electrophoresis.(omitted)

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The Putative Sigma (YlaC) and Anti-Sigma Factors (YlaD) from Bacillus subtilis

  • Ryu, Han-Bong;Tsogbadrakh. M;Sa-Ouk kang
    • Proceedings of the Korean Biophysical Society Conference
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    • 2001.06a
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    • pp.51-51
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    • 2001
  • Two open reading frame designated as ylaC and ylaD in the Bacillus subtilis genomic sequencing project, were cloned using pRB374 vector which is shuttle vector in E. coli and B. subtilis. YlaC and YlaD have the sequence homology to SigX and SigW to YbbM, respectively, which are known to be ECF sigmaand anti-sigma factor, respectively.(omitted)

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Low-power Decimation Filter Structure for Sigma Delta A/D Converters in Cardiac Applications (심장박동기용 시그마 델타 A/D 변환기에서의-저전력 데시메이션 필터 구조)

  • 장영범;양세정;유선국
    • The Transactions of the Korean Institute of Electrical Engineers D
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    • v.53 no.2
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    • pp.111-117
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    • 2004
  • The low-power design of the A/D converter is indispensable to achieve the compact bio-signal measuring device with long battery duration. In this paper, new decimation filter structure is proposed for the low-power design of the Sigma-Delta A/D converter in the bio-instruments. The proposed filter is based on the non-recursive structure of the CIC (Cascaded Integrator Comb) decimation filter in the Sigma-Delta A/D converter. By combining the CSD (Canonic Signed Digit) structure with common sub-expression sharing technique, the proposed decimation filter structure can significantly reduce the number of adders for implementation. For the fixed decimation factor of 16, the 15% of power consumption saving is achieved in the proposed structure in comparison with that of the conventional polyphase CIC filter.