• 제목/요약/키워드: Start-Up Process

검색결과 343건 처리시간 0.022초

양수발전 설비에 적용 가능한 새로운 고장 예측경보 알고리즘 개발 (Development of a New Prediction Alarm Algorithm Applicable to Pumped Storage Power Plant)

  • 이대연;박수용;이동형
    • 산업경영시스템학회지
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    • 제46권2호
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    • pp.133-142
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    • 2023
  • The large process plant is currently implementing predictive maintenance technology to transition from the traditional Time-Based Maintenance (TBM) approach to the Condition-Based Maintenance (CBM) approach in order to improve equipment maintenance and productivity. The traditional techniques for predictive maintenance involved managing upper/lower thresholds (Set-Point) of equipment signals or identifying anomalies through control charts. Recently, with the development of techniques for big analysis, machine learning-based AAKR (Auto-Associative Kernel Regression) and deep learning-based VAE (Variation Auto-Encoder) techniques are being actively applied for predictive maintenance. However, this predictive maintenance techniques is only effective during steady-state operation of plant equipment, and it is difficult to apply them during start-up and shutdown periods when rises or falls. In addition, unlike processes such as nuclear and thermal power plants, which operate for hundreds of days after a single start-up, because the pumped power plant involves repeated start-ups and shutdowns 4-5 times a day, it is needed the prediction and alarm algorithm suitable for its characteristics. In this study, we aim to propose an approach to apply the optimal predictive alarm algorithm that is suitable for the characteristics of Pumped Storage Power Plant(PSPP) facilities to the system by analyzing the predictive maintenance techniques used in existing nuclear and coal power plants.

신규 제품아키텍처 개발을 위한 기업조직의 설계: PDA 개발에 있어 샤프와 카시오의 개발조직 비교 분석 (Organizational Design for New Product Architecture Development: Comparative Analysis of Sharp and Casio on PDA Development)

  • 위정현
    • 기술혁신연구
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    • 제14권1호
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    • pp.1-30
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    • 2006
  • The purpose of this paper is to analyze the organizational design and management of product development in creating new product architecture by an established firm. For the purpose, the paper put up the organizational design in the process of PDA(Personal Digital Assistant) development of Sharp and Casio which were Japanese major PDA firms in 1990s. PDA is the product born through architectural change from Electronic Organizer. Prior research on the product architecture change and organizational adaptation emphasized that an established firm is difficult to adapt to new product architecture due to the restriction of prior technology or organizational inertia. For overcoming these problems and successful development of new product architecture, organizational design and management in the process of product development becomes essential. In case of Sharp, corporate development project team had been used to overcome the restrictions from architectural knowledge accumulated through previous product. After launching first new PDA by corporate development project team, Sharp created a new division and pushed an evolution of PDA, when new PDA market start to grow up rapidly toward a major market segmentation. As a result, Sharp was able to build up stable PDA project trajectory. However, Casio was late for three years in launching of new PDA architecture because previous division charging of Electronic Organizer tried to develop first new PDA. Casio's PDA development was prohibited by engineers of previous division because new PDA architecture was inferior on user interface and display definition. That is, Casio's first PDA development was restricted by architectural knowledge of previous product.

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신규제품 아키텍처 개발을 위한 기업조직의 설계 -PDA 개발에 있어 샤프와 카시오의 개발조직 비교 분석-

  • 위정현
    • 기술경영경제학회:학술대회논문집
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    • 기술경영경제학회 2005년도 27회 하계학술발표회 논문집
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    • pp.44-68
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    • 2005
  • The purpose of this paper is to analyze the organizational design and management of product development in creating new product architecture by an established firm. For the purpose, the paper put up the organizational design in the process of PDA(Personal Digital Assistant) development of Sharp and Casio which were Japanese major PDA firms in 1990s. PDA is the product born through architectural change from Electronic Organizer. Prior research on the product architecture change and organizational adaptation emphasized that an established firm is difficult to adapt to new product architecture due to the restriction of prior technology or organizational inertia. For overcoming these problems and successful development of new product architecture, organizational design and management in the process of product development becomes essential. In case of Sharp, corporate development project team had been used to overcome the restrictions from architectural knowledge accumulated through previous product. After launching first new PDA by corporate development project team, Sharp created a new division and pushed an evolution of PDA, when new PDA market start to grow up rapidly toward a major market segmentation. As a result, Sharp was able to build up stable PDA project trajectory. However, Casio was late for three years in launching of new PDA architecture because previous division charging of Electronic Organizer tried to develop first new PDA. Casio's PDA development was prohibited by engineers of previous division because new PDA architecture was inferior on user interface and display definition. That is, Casio's first PDA development was restricted by architectural knowledge of previous product.

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Anaerobic Ammonium Oxidation Process in an Upflow Anaerobic Sludge Blanket Reactor with Granular Sludge Selected from an Anaerobic Digestor

  • Tran, Hung-Thuan;Park, Young-Joo;Cho, Mi-Kyeoung;Kim, Dong-Jin;Ahn, Dae-Hee
    • Biotechnology and Bioprocess Engineering:BBE
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    • 제11권3호
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    • pp.199-204
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    • 2006
  • The purpose of this work was to evaluate the development of the anammox process by the use of granular sludge selected from a digestion reactor as a potential seed source in a lab-scale UASB (upflow anaerobic sludge blanket) reactor system. The reactor was operated for approximately 11 months and was fed by synthetic wastewater. After 200 days of feeding with $NH_4^+\;and\;NO_2^-$ as the main substrates, the biomass showed steady signs of ammonium consumption, resulting in over 60% of ammonium nitrogen removal. This report aims to present the results and to more closely examine what occurs after the onset of anammox activity, while the previous work described the start-up experiment and the presence of anammox bacteria in the enriched community using the fluorescence in situ hybridization (FISH) technique. By the last month of operation, the consumed $NO_2^--N/NH_4^+-N$ ratio in the UASB reactor was close to 1.32, the stoichiometric ratio of the anammox reaction. The obtained results from the influent-shutdown test suggested that nitrite concentration would be one key parameter that promotes the anammox reaction during the start-up enrichment of anammox bacteria from granular sludge. During the study period, the sludge color gradually changed from black to red-brownish.

Competency Model Development for Job Creation for Undergraduate Students: Focusing on Undergraduate Students Preparing for Franchise Job Creation

  • PARK, Hyun-Kyung;LEE, Sang Seub
    • 한국프랜차이즈경영연구
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    • 제11권3호
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    • pp.27-41
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    • 2020
  • Purpose: This study was conducted for purpose to derive a model of the founding competency of undergraduate students preparing for job creation. We want to support undergraduate students who are preparing to start a job creation so that they can successfully start a job creation. In Korea, research on entrepreneurship competency has been actively conducted for a variety of subjects including undergraduate students, but research on job creation competency is insufficient. To this end, we intend to contribute to the success of undergraduate students preparing for job creation by deriving a job competency model. Research design, data, and methodology: In order to derive job creation competency, interviews were conducted with best practices in the job creation activity process, and the job creation competency was derived using Spencer and Spencer's competency model development process and competency dictionary. Result: The derived competencies were further supplemented through the verification of job creation experts and HRD experts, and a total of 3 competency groups, 13 competences, and 44 specific actions were derived. The derived job creation competency model is significant in that it is an initial study that attempts to develop job creation competency, that it can be a reference point for developing curriculum for undergraduate students preparing for job creation, and that they have developed a competency model in the new field of job creation. However, despite this significance, there are some limitations. First, the derived competency model did not perform validity verification using quantitative research. Second, the difference analysis between the excellent group and the average group was not conducted. Third, the level of behaviors could not be staged. Lastly, it was not possible to compare it with the competency of franchisor and job creation for undergraduate student competency. Therefore, it is necessary to upgrade the job creation competency model by conducting follow-up studies. The following is suggested as a follow-up study. First, verification of the validity of job creation competency, and second, a comparative study of excellent cases and average group. Third, a study on the level of action level of job creation competency. Lastly, it is a comparative study of job creation competency and the competency of franchise affiliates.

지속 가능한 도시경영을 위한 중국 후난성 주요 도시의 공간적 성장 특징분석 (Analysis of Spatial Growth Characteristics of Major Cities in Hunan Province, China for Sustainable Urban Management)

  • 양리쥔;김현철;안철옥
    • 산업경영시스템학회지
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    • 제45권3호
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    • pp.197-203
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    • 2022
  • Urban space expansion is an important symbol of the urbanization process and has always been an important topic in urban studies. In addition, for sustainable city management, it is important to identify factors that can influence, such as the driving force and direction of urban space expansion, from the stage of establishing an urban development plan. To understand these factors, by observing the expansion process of a specific city, it is possible to sufficiently observe how the urban spatial dimension changes. Through a series of processes, the spatial growth characteristics of the city are analyzed, and the influence and results of important factors are analyzed. For this purpose, this paper examines the changes in the city's outer boundary and land use structure through monitoring data on urban areas of 14 cities in Hunan Province, China from 2000 to 2016. Temporal and spatial regularity according to the urban space expansion of these cities were analyzed, and a preliminary assessment was made on whether the urban space expansion is coordinated with the urban population growth. The assessment result showed: (1) The urban space of most cities has been extended rapidly in 2000-2015 however, the rate and the intensity of urban space expanding has been declining. (2) The construction of the industrial park is the core driving force of the urban space expanding, and the change of the urban space structure is manifested as enclave city expansion because that the industrial park is usually far away from the city center. (3) The population agglomeration is another driving force of the urban space expanding. At this time, the urban space expanding is like boundary extension. (4) Except Changsha city, all of the cities has a high urbanization-area-growth elastic coefficient. It means that most of the cities should enhance the land use degree.

중장년 직장인의 창업 개인역량 및 창업기회인식이 창업의도에 미치는 영향: 창업기회평가의 매개효과를 중심으로 (The Effect of Entrepreneurial Competence and Perception of Entrepreneurship Opportunities on Entrepreneurial Intention: Focusing on the Mediating Effect of Entrepreneurship Opportunity Assessment)

  • 진주영
    • 벤처창업연구
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    • 제18권3호
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    • pp.45-60
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    • 2023
  • 본 연구에서는 창업기회평가를 매개하여 중장년 직장인의 창업 개인역량과 창업기회인식이 창업의도에 미치는 영향을 분석하였다. 창업 개인역량의 하위변수로는 사전지식, 긍정적 태도, 사회적 네트워크로 구분하였다. 본 연구의 실증분석을 위하여 창업에 관심이 있는 전국의 직장인을 대상으로 약 15일간(2023.02.06.~2023.02.20.) 네이버 오피스를 이용한 온라인 설문조사를 실시하였으며, 총 262부를 수집하여 결측치 12부를 제외한 250부를 대상으로 SPSS Ver.24.0과 PROCESS MACRO Model 4.0을 실증분석에 사용하였다. 분석결과는 첫째, 창업자 개인역량의 사전지식과 사회적 네트워크 및 창업기회인식은 높을수록 창업기회평가와 창업의도가 증가하는 유의한 정(+)의 영향력을 미치는 것으로 나타났다. 반면 창업자 개인역량 중 긍정적 태도는 창업기회평가 및 창업의도에 영향을 미치지 않는 것으로 나타났다. 또한 창업기회평가 및 창업의도에 미치는 영향력의 크기는 창업기회인식, 사전지식, 사회적 네트워크 순으로 나타났다. 이는 중장년 직장인의 창업에 대한 긍정적태도는 COVID-19로 인한 창업환경 위축, 창업준비 부족으로 인한 실패의 두려움, 과잉자신감에 따른 인지편향의 오류로 인한 창업실패 사례 속출 등으로 창업이 부정적인 이미지를 가지고 있다는 것을 시사하고 있다. 둘째, 창업자 개인역량과 창업기회인식이 통제된 상황에서 창업기회평가는 창업의도에 유의한 정(+)의 영향을 미치는 것으로 나타났다. 셋째, 창업기회평가는 창업자 개인역량의 사전지식, 사회적 네트워크 및 창업기회인식과 창업의도 간을 매개하는 것으로 나타났지만, 긍정적 태도와 창업의도 간은 매개하지 않는 것으로 나타났다. 넷째, 창업기회평가 및 창업의도에 미치는 영향요인 중 창업자 개인역량보다 창업기회인식이 더 크게 나타나 창업기회인식의 중요함이 확인하였다. 다섯째, 창업자 개인역량인 사전지식과 네트워크가 창업기회평가 및 창업의도에 영향을 미치는 것으로 나타나 창업사전지식 함양 및 경험의 중요성을 인식하도록 창업교육을 강화하면 중장년 직장인들의 창업을 활성화할 수 있다는 점을 확인하였다.

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KSTAR 토카막 장치 진공 기술 현황 (Status of vacuum technique in KSTAR)

  • 김광표;김현석
    • 진공이야기
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    • 제4권1호
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    • pp.16-23
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    • 2017
  • Recently, KSTAR, Korea's superconducting fusion energy research and development device, has succeeded in driving the high performance plasma for 70 seconds for the first time in the world. Continuous plasma operation technology is an essential factor for commercialization of fusion energy power generation. Therefore, this achievement is expected to play a major role in the research of fusion technology required for future fusion power plants. In order to operate the KSTAR, the discharge process in which the neutral gas is turned into the plasma should be preceded in the start-up (breakdown) phase of tokamak operation. This process essentially involves the vacuum environment in the tokamak device. KSTAR has successfully operated a vacuum pumping system to achieve the target level of the vacuum environment through a high temperature baking operation, a discharge cleaning process and boronization.

대전지역 벤처창업 활성화를 위한 벤처 자금생태계 개선방안 (Financial Ecosystem Development for Venture Capital Activation in Daejeon, Korea)

  • 최종인;백강
    • 벤처창업연구
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    • 제13권6호
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    • pp.39-48
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    • 2018
  • 대전지역은 정부출연연구소, 대덕특구, KAIST 등 우량한 기술인프라를 보유하고 있음에도 불구하고, 기술창업을 위한 초기투자 및 성장지원 하부구조가 열악한 실정이다. 특히 대전지역의 벤처 자금공급 규모는 다른 혁신 인프라에 비해 상대적으로 부족한 것으로 평가받고 있다. 이에 본 연구는 대전지역 벤처 자금생태계는 어떤 진화 과정을 겪었으며 향후 개선 보완할 점이 무엇인지를 분석함으로써, 벤처창업 활성화에 대한 시사점을 제시하고자 하였다. 첫째, 창업 초기기업에 대한 엔젤투자 활성화 및 민간자금 유입을 견인하는 정책금융의 역할이 강화되어야 한다. 둘째, 투자전문인력의 지역 내 육성을 위해 지역에서 조성한 펀드를 지역 내 기관에 부여하고, 수도권 투자자의 지역 내 정착을 지원하며, 대학에서 투자전문가 양성과정 운영이 필요하다. 셋째, 기존 창업보육센터에 액셀러레이터 기능을 추가하고 신규 액셀러레이터를 육성하기 위해 유관기관 간 협력이 필요하다. 넷째, 지방정부의 역할 확대를 위해 펀드조성 및 공무원의 개방혁신 마인드, 중앙정부와의 효과적 의사소통이 필요하다. 다섯째, 우수인력 유입, 기술탈취 방지, 재도전 환경 개선 등 기본적인 벤처생태계 하부구조를 확충해야 한다. 여섯째, '창업-성장-회수-재도전'의 단계별 창업자금 지원정책을 재정비할 필요가 있다. 본 연구는 최근 급변하고 있는 대전지역 벤처창업 자금생태계의 현황을 파악했다는 점에서 의의가 있다. 특히 대전지역 벤처기업의 성장 단계별 부족자금의 형태가 무엇인지를 파악하고, 기존 자금생태계의 효율적 활용 방안을 찾은 점에서 차별성이 있다고 하겠다.

균형성과표(BSC) 기반 창업기업 선정평가지표 개발 (A Study on the Development of an Assessment Index for Selecting Start-ups on Balanced Scorecard)

  • 정경희;최대수
    • 벤처창업연구
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    • 제13권6호
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    • pp.49-62
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    • 2018
  • 본 연구는 정부 창업지원정책의 효율성 제고를 위하여 성공가능성이 높은 창업기업 선별을 위한 선정평가지표 개발을 목적으로 진행하였다. 창업기업 선정평가지표 개발을 위해 첫째, 관련 문헌고찰을 통해 평가지표에 대한 이론적 재정립을 하였다. 둘째, 창업생태계의 각 분야 전문가 대상 델파이 기법을 활용하여 주요 평가항목을 도출하였다. 셋째, 항목별 중요도 산정을 위하여 AHP 기법을 적용하여 가중치를 도출하였다. 연구결과를 요약하면 다음과 같다. 첫째, 균형성과표(BSC) 관점에서 창업자 선정평가지표의 적용을 시도하였다. 둘째, 선행연구 고찰을 통한 창업자 역량평가 요인 및 관련 분야의 창업 전문가를 대상으로 의견 수렴과 구조화된 설문의 최종 주요 문항을 도출하였다. 셋째, 도출된 주요 선정평가지표의 가중치 적용결과, 관점별, 대항목인 사업화 관점 > 시장관점 > 기술개발관점 > 조직역량관점 순으로 나타났다. 중항목의 사업화 관점에서는 제품화 역량, 시장관점에서는 시장경쟁력, 기술개발관점에서는 제품 차별성 역량, 조직역량관점에서는 창업자의 역량이 중요하게 인지되었으며, 전반적으로 주요 중항목은 창업자 역량 > 시장경쟁력 > 제품화 역량 > 제품 차별성 순으로 나타났다. 소항목 간의 중요도는 경쟁제품의 비교 우수성이 가장 우선순위가 높았으며, 시장 진입 가능성 > 창업자의 보유역량 > 자본조달능력 > 창업자의 추진 의지 및 열정 순으로 나타났으며 파트너의 보유역량, 구성원의 명확한 역할과 기능적 구성 정도, 협력 관계 정도, 연구개발투자 등이 낮게 나타났다. 이러한 연구결과는 기존 선정평가지표 개발에 관한 선행연구의 개념적 대안 제시 및 향후 정교한 지표개발을 위한 의미 있는 시사점을 제시하였다.