• Applied Chemistry for Engineering
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• v.31 no.3
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• pp.334-337
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• 2020

Korea Laboratory Accreditation Scheme (KOLAS) introduces a new standard for test and calibration laboratories to operate management system and to produce valid results in accordance with the requirements of KS Q ISO/IEC 17025. The standard is based on the national standard law for the accreditation of test, inspection and calibration laboratories. International Laboratory Accreditation Cooperation (ILAC) has recently established its new criteria. The accredited test and calibration laboratories should complete the transition of their management system by November 2020 following KS Q ISO/IEC 17025:2017. A total of 899 of test, inspection and calibration laboratories in Korea are influenced by the transition policy. This paper summarized general requirements for a competence of laboratory management system.

• Transactions of the KSME C: Technology and Education
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• v.5 no.2
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• pp.105-113
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• 2017

KOLAS (KOrea Laboratory Accreditation Scheme) belongs to APLAC (Asia Pacific Laboratory Accreditation Cooperation). KOLAS manages the accreditation scheme for measurement traceability to SI units. As per June 2016, there are 22 KOLAS laboratories for liquid flow metering. Among them, 12 laboratories participated in the proficiency test (PM2015-08) for water flow metering, organized by KASTO (Korea Association of Standards and Testing Organizations). This proficiency test was performed with three kinds of flow ranges ($3.6m^3/h{\sim}12m^3/h$, $40m^3/h{\sim}80m^3/h$, $40m^3/h{\sim}200m^3/h$) considering the CMC (calibration and measurement capability) of the participating laboratories. The purpose of the proficiency test was to find out measurement equivalence of the CMC's between each participating laboratory and the reference testing laboratory (KRISS). The measurement equivalence was tested by the number of equivalence ($E_n$). If ${\mid}E_n{\mid}$ < 1, the measurement equivalence was established. All the participating laboratories passed this proficiency test.

• Proceedings of the Korea Information Processing Society Conference
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• 2005.05a
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• pp.727-730
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• 2005

계측기기의 사용업체들은 기기 관리부분 및 교정검사 주기가 상이한 계측기기 교정검사 관리부분의 어려움으로 인하여 교정검사 유효기간을 지나치는 경우가 많았으며, 국가교정검사 기관은 각 계측기기의 측정 데이터 결과 형식이 달라 교정검사 후 발행하는 성적서의 작성 및 발행 하는데 어려움이 많았다. 또한 계측기기 사용업체와 교정검사기관 모두 관리 프로그램과 교정검사 성적서 관리 프로그램을 별도로 사용하였다. 이러한 계측기기 및 성적서 관리를 하나의 시스템으로 쉽게 통합관리 할 수 있도록 구성 하였으며, 각각의 상이한 계측기기 주기 정보를 데이터베이스화 하여 주기별, 측정기기별, 업체별 검색 및 자동 팝업창으로 상태를 알려주게 하였고, 계측기기별 상이한 형식의 측정 데이터는 부서별, 유형별로 데이터베이스화 하여 응용프로그램과 연동될 수 있도록 구현 하였다. 계측기기 관리 및 교정검사 관리 부문에 있어서 사용 대상에 따라 GUI 환경으로 구현된 프로그램으로서 기본설정을 통하여 교정대상업체 및 교정검사기관 모두 하나의 통합된 프로그램으로 사용 및 관리를 할 수 있다.

• Journal of Sensor Science and Technology
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• v.4 no.1
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• pp.43-50
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• 1995

We measured the traceability error for nine high temperature calibration service centers including KRISS through the round-robin test. In this test the type S thermocouple, which used as a calibration standard thermometer commonly, was accommodated as a test thermocouple. Intercomparison data of three institutions were coincident with KRISS's data within ${\pm}0.5^{\circ}C$, which was the calibration uncertainty of the type S thermocouple, but the remaining six institution's data were deviated from the assigned uncertainty level. Deviation of the intercomparison data increased gradually according to the increase of the test temperature. and the maximum difference was so large as about $2.0^{\circ}C$ at the highest test temperature, gold point. In this study we found the traceability error of high temperature calibration service center for a high temperature standard was within $2.0^{\circ}C$.

• Proceedings of the Korean Society of Medical Physics Conference
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• 2005.04a
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• pp.96-99
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• 2005

본 연구에서는 식품의약품안전청의 도움을 받아 1998년부터 2003년까지 장기간에 걸친 교정정수의 분석을 통한 원통형이온함의 모델별 안정성을 확인하여 보다 효율적인 이온함의 선택으로 방사선치료기관의 선량측정체계의 정확도 향상에 기여하고자 한다. 방사선치료기관에서 사용하고 있는 Farmer형의 원통형이온함에 대한 에어커마 교정정수(NK)를 분석한 결과 Wellhofer FC65G (IC70)와 PTW 30001, 30013 (30006) 그리고 NE 2571 이온함 모델에 대한 교정정수는 모두 0.3%이내에서 잘 일치하였다. 또한 에어커마 교정정수를 이용하여 계산된 물 흡수선량 교정정수(Cal. ND,W)와 실제 측정에 의해 결정된 물 흡수선량 교정정수(Mea. ND,W)를 비교한 결과는 약 1.0% 정도 측정에 의한 교정정수가 높게 나타났으며 에어커마 교정정수를 분석한 결과와 마찬가지로 위 동일한 모델의 이온함에 대해서 측정의 표준편차가 0.14～0.17%로 나타나 장기적인 안정성이 입증되었다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2010.07a
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• pp.389-392
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• 2010

지역사회교정은 기존의 시설내처우와 대비되는 개념으로 형사절차 전반에 지역사회가 개입하여 사회내처우를 실행하는 것이다. 이는 시설내처우가 지닌 과밀 수용, 교정 프로그램의 효율성, 범죄의 학습화 등의 문제점을 극복하고 범죄자들의 진정한 사회복귀를 도모할 수 있는 방법으로 인식되고 있기 때문이다. 하지만 지역사회교정 또한 많은 문제점들을 가지고 있어 이에 대한 해결책의 연구가 필요하다. 이 연구에서는 이러한 문제인식에 기인해서 지역사회교정의 개념과 문제점들에 대해 살펴보고 이의 대안을 제시하였다. 지역사회교정의 활성화를 위해서는 담당기관 및 인력의 확충 및 담당 직원의 세심한 채용 및 지속적인 관리를 통해 전문화를 유도하며, 전문 프로그램을 수행할 수 있는 민간봉사자와의 네트워크 구축이 필요하며, 지역기관, 지자체, 관계 당국 간의 이해와 협조가 반드시 필요하게 될 것이다. 이와 함께 지역사회교정의 실천단계에 있어 발생될 수 있는 많은 문제점들에 대한 객관적이고 실증적인 후속 연구가 진행되어야 할 것이다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.10a
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• pp.411-414
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• 2016

K-water institute is a calibration and test institute accredited by international standard calibration center for water-level meters. Due to the absence of on-site calibration system and procedure for Float Water Level Meter, the calibration was performed only in the standard calibration laboratory. In this study, mobile calibration system and procedure were developed to calibrate Float Water Level Meter on site using scale bar and camera. It is possible to obtain reliable water-level data and achieve consistent data management.

• Journal of dental hygiene science
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• v.13 no.1
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• pp.105-114
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• 2013

The purpose of this study was to offer information to medical institution of specializing in orthodontic patients by surveying the influence of orthodontic patients' perception of treatment according to orthodontic treatment upon satisfaction and recommendation with orthodontic treatment, targeting patients with completion of orthodontics who have experience of having received orthodontic treatment. As a result of SAS ver. 9.1 analysis on what was surveyed from February 2010 to August, the following conclusions were obtained. In comparing perception of treatment on orthodontic treatment according to general characteristics, women compared to men were indicated to be higher (p<0.05) in inconvenience recognition (p<0.05) on orthodontic device and in inconvenience during orthodontic treatment (p<0.05). In perception of treatment on orthodontic treatment, the inconvenience of orthodontic device accounted for 79.3%, thereby having been recognized by the majority of subjects. Even the inconvenience during orthodontic treatment was being recognized by 69.8%. The orthodontic treatment expenses appeared enough to be expected by 61.6%. The frequency of visiting hospital during orthodontic treatment was indicated as saying of having been proper by 72.8%. The period of orthodontic treatment was indicated to be proper as well by 61.2%. Even understanding about treatment contents during orthodontic treatment was indicated to be understood by 62.6%. In the results of correlation among subjects' cooperation with dental treatment, satisfaction with treatment service, recommendation of this clinic, and satisfaction with the convenient facilities, the significantly positive correlation was shown (p<0.05) in all among items in each.

• Progress in Medical Physics
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• v.27 no.1
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• pp.46-53
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• 2016

Periodical calibrations of radiation detectors are important for accurate quality assurance of therapeutic linac. The measuring instruments such as ion-chamber, thermometer, barometer, and survey meter should be calibrated periodically. Period of calibration for these instruments is suggested 6 month to one year in Korea and two years in other countries nowadays. Therefore, the determination of reasonable period for calibration is needed. In this study, we plan to utilize the results of these survey; frequent in use, how to use and stability of instruments, to determine the optimized period of calibration for the instruments in the departments of radiation oncology in Korea based on the ILAC-G24. The SurveyMonkey web-based survey tool was used and the objects of survey were 18 department of radiation oncology in university hospitals, and 15 departments were answered. The 64 questionnaires which supposed to be answered in 50 minutes were classified as the information of candidates, the thermometer, the barometer, the surveymeter, and the ion-chamber. The thermometers and the barometers were not under periodical calibration for more than half of candidates. The periods of calibration of surveymeters were 6 month to 1 year. We expect that the calibration period can be determined based on these survey results.

• Proceedings of the KOR-BRONCHOESO Conference
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• 2002.12a
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• pp.5-5
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• 2002