• 제목/요약/키워드: QC

검색결과 473건 처리시간 0.02초

의료용 선형 가속기의 QC/QA

  • 이병용
    • 한국의학물리학회지:의학물리
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    • 제4권1호
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    • pp.9-15
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    • 1993
  • 의료용 가속기의 QC/QA는 방사선 치료 QC/QA에서 가장중요한 위치중 하나를 차지하고 있다. 이전 이유료 오래전부터 QC/QA가 강조되어 왔으며, 많은 종류의 QC/QA가 소개되어왔다. 본 연구에서는 기존의 QC/QA 프로그램을 비교하고 합리적인 의료용 선형가속기 QC/QA에 대한 주기, 방법등에 관해 기술하였다.

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비정상 자궁경부도말에서 AutoPap 300 QC System의 민감도와 Score에 영향을 주는 인자의 평가 (Sensitivity and Scoring of AutoPap 300 QC System for Abnormal Cervicovaginal Cytology)

  • 홍성란
    • 대한세포병리학회지
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    • 제9권2호
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    • pp.139-146
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    • 1998
  • The AutoPap 300 QC System is an automated device for the analysis and classification of conventional cervical cytology slides for quality control purpose. These studies evaluated the sensitivity of the AutoPap 300 QC System, and estimated morphologic features other than epithelial abnormality to identify a high quality control(QC) score with the AutoPap 300 QC System. The sensitivity of the AutoPap 300 QC System at 10% review rate for 210 cases of cervicovaginal cytology with low grade squamous intraepithelial lesion(LSIL) and higher grade lesion was assessed, and compared with a 10% random rescreening. The morphologic features, such as presence of endocervical component, dirty background, atrophy, abnormal ceil size, and celluiarity of single atypical cells were estimated in 45 cases of no review and 30 cases of QC review cases. The AutoPap 300 QC System identified 119(56.7%) out of 210 cases with LSIL and higher grade lesion at 10% review rate. It was more sensitive to squamous cell lesions$(50{\sim}62%)$ than to glandular lesions(10%). The dirty background and the scanty cellularity of single atypical cells were significantly related to low QC score. Conclusively, AutoPap 300 QC System is superior to human random rescreen for the identification of false negative smears. The upgrading of this device is required to enhance the defection of glandular lesion and certain Inadequate conditions of the slides.

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효과적인 품질분임조활동의 단계별 진행요령에 관한 연구 (A Study on the Step-by-Step Process for Effective Quality Circle Activities)

  • 이강인
    • 품질경영학회지
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    • 제31권3호
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    • pp.136-159
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    • 2003
  • The purpose of this paper is to propose the effective guidance of Quality Circle(QC) activities. Since 1975, variety of organizations in Korea have widely implemented QC activities for their management systems. The industries have enthusiastically used QC activities and were influenced from them. However, the academics were less interested in this subject, as a result, there were no systematic guidances for QC activities. Thus, in this paper, the effective guidance for QC activities were suggested which were based on the survey from QC proceedings presented in the companies, in the local areas and the national wide contests. As a result, the first main issue is to pick repeated mistakes up during the process period such as unmatched the causes and effects relations in characteristics diagrams, improper selection of important control items in Pareto diagram and so on. Secondly, how to overcome statistics and use them for QC activities. Thirdly, to remind team members about Quality Control 7 tools. Finally, Minitab(Release-13) software has been found that it is not matched with using Korean Standards(KS).

공장(工場)새마을운동(運動)과 QC Circle 운동(運動)의 운영방법(運營方法)에 관한 고찰(考察) (A Study of the Operation System for the factory new community Movement & QC circle Activity (movement))

  • 김원중
    • 품질경영학회지
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    • 제5권2호
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    • pp.29-38
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    • 1977
  • The QC circle is a small group organized for accomplishing the company's purpose of improving constitutions of the enterprise, developing the capabilities of the mem-bers and improving human relations. The present study intends to investigate the current situations and problems of the QC circle and to develop most effective models for QC circle movement in Korea. For this purpose the author surveyed 93 QC circles and interviewed more than 20 QC circle members and managers. The author has concluded that it is necessary to: 1. establish the authority and duty of the QC divisions. 2. train the top and middle management, especially the indirect divisions manage-ment. 3. motivate the QC circle members for achieving their purpose.

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사회복지서비스의 질적 향상을 위한 관리기법으로서 복지QC 활동에 관한 사례연구 (A Case Study on the Welfare QC Activity as a Management Technique for Improving Quality in Social Welfare Service)

  • 박경일
    • 한국사회복지학
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    • 제40권
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    • pp.97-130
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    • 2000
  • The purpose of this paper is a case study on welfare QC circle which is considered as one of the management techniques to improve service quality among recently changing welfare environment. Futhermore this paper is also to suggest a new introduction of the welfare QC circle in korean social welfare agency. To accomplish these purpose, this study theoretically examines activity process and techniques of welfare QC circle. In practice, three social workers and one supervisor working at 'D' community welfare center in pusan are participated during six months. As a result, we founded the specific problems that is aroused from youth volunteer group within by fish bone chart, and proposed the alternative choices by 5W1H check sheet, and also certified to decrease turnover ratio in youth volunteering by pareto chart. This study, however, has its limitation in selection only one case study on welfare QC circle of youth volunteering. Welfare QC circle could be much contributed as one of the management techniques to enhance the quality of social welfare service from the viewpoint of the customer, If it is well developed korean welfare QC model which is suitable to social welfare organization and service. Therefore, in order to introduce welfare QC circle in korean social welfare organizations, I would like to suggest to find out a useful text of welfare QC and organize some welfare QC study groups including other suggestions.

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문제해결을 위한 QC 도구의 체계적 활용방안에 대한 연구 (A Study on Implementing the QC Tools for Systematic Problem-Solving)

  • 윤태홍;김창열;변재현
    • 품질경영학회지
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    • 제37권2호
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    • pp.68-77
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    • 2009
  • There are many quality control(QC) tools useful for solving quality problems. In this paper, QC 7 tools, new QC 7 tools, and other quality tools are first compared with respect to their frequency of use. We suggest an integrated problem-solving procedure to systematically deal with various quality problems. For each step a streamlined flow chart is presented to help the practitioners to adopt relevant tools depending on certain situations they face. The procedure will help quality practitioners solve field quality problems.

QC 공정도에 관한 연구 (A Study on the QC Process Chart)

  • 엄태원;정수일
    • 산업경영시스템학회지
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    • 제15권26호
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    • pp.137-150
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    • 1992
  • As a part of quality control activities for developing competitive products, the significant method of process quality assurance for solving initial production quality problems is just quality control process chart(QC process chart). However, the QC process chart which is used for domestic enterprises at present had obscured in basement and not itemized by industry and formally used. So. in this study, the improved QC process charts which classified by industry we suggested so that each enterprise may utilize them according to the each enterprise characteristics.

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전 병렬구조 기반 8.1 Gbps 고속 및 다중 모드 QC-LDPC 복호기 (8.1 Gbps High-Throughput and Multi-Mode QC-LDPC Decoder based on Fully Parallel Structure)

  • 정용민;정윤호;이성주;김재석
    • 전자공학회논문지
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    • 제50권11호
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    • pp.78-89
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    • 2013
  • 본 논문은 전 병렬구조를 기반으로 고속으로 동작하며 다중 모드를 지원하는 quasi-cyclic (QC) low-density parity-check(LDPC) 복호기를 제안한다. 제안하는 QC-LDPC 복호기는 고속 throughput을 지원하기 위하여 전 병렬구조를 기반으로 설계되었다. 전 병렬구조를 사용함에 따라 발생하는 인터커넥션의 복잡도 문제는 broadcasting 기반의 sum-product 알고리즘의 사용과 저복잡도 순환 쉬프트 네트워크를 제안함으로써 해결하였다. 또한, 전 병렬구조에서 체크 노드 프로세서와 변수 노드 프로세서의 사용량이 많아 발생하는 복잡도 문제를 제안하는 결합된 체크 및 변수 노드 프로세서를 통하여 해결하였다. 제안하는 QC-LDPC 복호기는 라우팅 방식의 인터커넥션 네트워크, 다중 모드를 지원하는 결합된 체크 및 변수 노드 프로세서와 순환 쉬프트 네트워크를 통하여 다중 모드를 지원할 수 있다. 제안하는 QC-LDPC decoder는 100 MHz 클락 주파수로 동작하며, 다중 모드를 지원하고 (1944, 1620) QC-LDPC 부호에 대해서 8.1 Gbps의 throughput을 지원한다.

품질코스트를 이용한 데이터 QC 활동의 자원할당 모형 연구 (A Resource Allocation Model for Data QC Activities Using Cost of Quality)

  • 이상철;신완선
    • 산업공학
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    • 제24권2호
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    • pp.128-138
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    • 2011
  • This research proposes a resource allocation model of Data QC (Quality Control) activities using COQ (Cost of Quality). The model has been developed based on a series of research efforts such as COQ classifications, weight determination of Data QC activities, and an aggregation approach between COQ and Data QC activities. In the first stage of this research, COQ was divided into the four typical classifications (prevention costs, appraisal costs, internal failure costs and external failure costs) through the opinions from five professionals in Data QC. In the second stage, the weights of Data QC activities were elicited from the field professionals. An aggregation model between COQ and Data QC activities has been then proposed to help the practitioners make a resource allocation strategy. DEA (Data Envelopment Analysis) was utilized for locating efficient decision points. The proposed resource allocation model has been validated using the case of Korea national defense information system. This research is unique in that it applies the concept of COQ to the data management for the first time and that it demonstrates a possible contribution to a real world case for budget allocation of national defense information.

두 개의 직렬 Barrel-Rotator를 이용한 QC-LDPC 복호기용 저면적 Multi-Size Circular Shifter (Low-Complexity Multi-Size Circular Shifter for QC-LDPC Decoder Based on Two Serial Barrel-Rotators)

  • 강형주
    • 한국정보통신학회논문지
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    • 제19권8호
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    • pp.1839-1844
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    • 2015
  • Low-density parity-check(LDPC) 코드는 우수한 에러 정정 능력으로 인해 점점 많은 통신 표준에서 채택되고 있으며 그 중 구현이 용이한 quasi-cyclic LDPC(QC-LDPC)가 많이 사용되고 있다. QC-LDPC 복호기에서는 데이터들을 rotation할 수 있는 cyclic-shifter가 필요하며, 이 cyclic-shifter는 다양한 크기의 rotation을 수행할 수 있어야 한다. 이러한 cyclic-shifter를 multi-size circular shifter(MSCS)라고 부르며, 이 논문에서는 MSCS를 적은 면적으로 구현한 구조를 제안한다. 기존의 직렬로 배치된 barrel-rotator 구조에서 rotation의 성질을 이용하여 필요 없는 멀티플렉서를 가려내고 이들을 제거함으로써 저면적을 구현하였다. 실험 결과 면적을 약 12% 줄일 수 있었다.