• 제목/요약/키워드: Small School

검색결과 8,277건 처리시간 0.038초

소도읍의 유형별 내부기능 특성 분석 (Analysis of the Distinguishing Characteristics of Small Towns in Korea)

  • 여홍구;지남석;김진영
    • 농촌계획
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    • 제13권4호
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    • pp.9-22
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    • 2007
  • With the establishment of municipalities, public interest in small towns in Korea has been on the rise. To initiate an effective study and suggest subsequent policies for small towns, it is necessary to analyze and discuss substantive issues based on specific conditions of these small towns. The primary objective of this paper is to categorize small towns into types and to analyze the peculiarities and differences of their internal factors. The focus of this research is to determine the general characteristics of the classified towns and to suggest specific revitalization and specialized studies about them. In the main analysis of this paper, 39 small towns are divided into sets according to urban rank, conditions of location, and size of the population in the central site. Furthermore, distinctions of the divided towns are analyzed using three constituents for urban organization, including populations, activities, and facilities/land. From the research results, it was determined that there is a difference between small town types, according to population, land cost, and urban activities, based upon the urban rank and size of the population in the central site. Therefore, this paper concludes it is necessary to conduct further studies on time series analysis regarding the peculiarity changes of the types, and to complement the variables for future related studies.

소형펀치 크리프 시험을 이용한 9Cr강의 크리프 상수 평가 (Assessment of Creep Properties of 9Cr Steel Using Small Punch Creep Testing)

  • 윤기봉;박태규;심상훈;정일석
    • 대한기계학회논문집A
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    • 제25권9호
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    • pp.1493-1500
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    • 2001
  • Recently small punch creep testing (or miniature disc bend creep test) has received much attention through European collaborative research projects. This method was considered as a substitute for the conventional creep rupture testing by which the residual creep life is measured from the specimen taken out from serviced components of high temperature plants. It would be beneficial if the material creep properties such as power law creep constants as well as the creep rupture life can be measured from the small punch creep test. In this paper a method of assessing creep constants from the small punch creep testing is proposed. Finite element analyses were performed to investigate evolution of stress and strain rate at the weakest locations of the small punch creep specimen. Elastic-plastic-secondary creep analyses were carried out. The estimation equations for creep constants by the small punch creep testing are proposed based on the finite analysis results. Small punch creep tests were also performed with 9Cr steel and the accuracy of the proposed equation was verified by the experimental results.

중소기업 유해트래픽 분석을 통한 보안관제 개선 방안 (Improved Security Monitoring and Control Using Analysis of Cyber Attack in Small Businesses)

  • 홍준석;임영환;박원형;국광호
    • 한국전자거래학회지
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    • 제19권4호
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    • pp.195-204
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    • 2014
  • 최근 지능화 고도화 되고 있는 사이버 위협으로부터 중소기업을 보호하기 위해서는 24시간 예방 탐지 분석 대응 해 주는 보안관제가 필수적이다. 이러한 중소기업의 보안관제를 지원하기 위해 정부로부터 예산지원을 받아 중소기업기술지킴센터가 구축되어 운영 중이며, 현재 900여 개 중소기업에 대해 보안관제서비스를 지원하고 있다. 본 논문에서는 중소기업 기술지킴센터에서 보안관제서비스를 지원하고 있는 중소기업들의 이상트래픽에 대해 살펴보고 중소기업의 보안관제 개선방안을 제시하였다.

Design of Small-Scaled Derailment Simulator for Investigating Bogie Dynamics

  • Eom, Beom-Gyu;Kang, Bu-Byoung;Lee, Hi-Sung
    • International Journal of Railway
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    • 제4권2호
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    • pp.50-55
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    • 2011
  • The dynamic stability of railway vehicle has long been one of the important issues in railway safety. The dynamic simulator has been used as a tool for investigating the dynamic stability of railway vehicles and wheel/rail interfaces. In particular, small scale simulators have been widely used in laboratory studies instead of full scale roller rigs which can be quite costly and rather inconvenient for testing out the effect of diverse design parameters. But techniques for design of a small scale simulator for the fundamental study about the dynamic characteristics of the wheel-rail systems and the bogie systems have not been well developed in Korea. Therefore, a research on the development of a small scale simulator for investigating bogie dynamics needs to be undertaken. The present paper investigates design of a small-scaled derailment simulator and the design of a small scale bogie. The simulator developed can be used to investigate the effect of diverse parameters such as attack angle, wheelbase and cant on dynamic behavior of the bogie and key dynamic performance parameters such as derailment coefficient and critical speed.

Recent Advances in Adjuvant Therapy for Non-Small-Cell Lung Cancer

  • Mi-Hyun Kim;Soo Han Kim;Min Ki Lee;Jung Seop Eom
    • Tuberculosis and Respiratory Diseases
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    • 제87권1호
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    • pp.31-39
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    • 2024
  • After the successful development of targeted therapy and immunotherapy for the treatment of advanced-stage non-small cell lung cancer (NSCLC), these innovative treatment options are rapidly being applied in the adjuvant setting for early-stage NSCLC. Some adjuvants that have recently been approved include osimertinib for epidermal growth factor receptor-mutated tumors and atezolizumab and pembrolizumab for selected patients with resectable NSCLC. Numerous studies on various targeted therapies and immunotherapy with or without chemotherapy are currently ongoing in the adjuvant setting. However, several questions regarding optimal strategies for adjuvant treatment remain unanswered. The present review summarizes the available literature, focusing on recent advances and ongoing trials with targeted therapy and immunotherapy in the adjuvant treatment of early-stage NSCLC.