• Journal of the korean veterinary medical association
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• v.36 no.2
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• pp.121-134
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• 2000

의학적 진단에서 검사결과가 연속형으로 측정되는 예는 매우 많다. 예를 들어 ELISA검사, 혈청화학적 검사, 방사선 검사 (이 경우에는 음성, 의양성, 양성등의 척도로 표현될 수 있음) 등에서는 적절한 기준을 설정한 후 이 기준점을 근거로 양성과 음성으로 판정하게 된다. 여기에서 한 가지 문제는 기준점 설정에 있다. 소위 정상 혹은 참고범위 (normal or reference range)가 분명히 있는 경우라고 실제 판정에 있어서는 질별이 없음에도 불구하고 검사결과 질병이 있는 것으로 판정할 오류 (혹은 그 반대)가 분명히 존재한다. 본 논문에서는 이러한 상황에서 접근할 수 있는 한가지 방법인 ROC 곡선에 대하여 설명하고자 한다.

• Korean Journal of Soil Science and Fertilizer
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• v.45 no.2
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• pp.293-300
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• 2012

This study was to investigate the unsuitable rate of the storage facilities, the changes in corrosion process over time after installation according to the status, the time to install the facilities, years elapsed after facilities installation, inspection of methods and motivation, and so on, based on the results of the inspection at the petroleum storage facilities conducted by domestic soil-relate specialized agency to derive optimal management plans which meet the status of soil contamination facilities. The results showed that the facilities more than 5 years after the initial leak test at the time of the installation need to be inspected periodically by considering costs of leak test and remediation of polluted soil. The inspection period can be decided by cost and leak test methods showing discrepancies for the results obtained from individual test whether it was direct or indirect. To compensate these matters, we suggested that the direct inspection method on regular schedule is recommended. On the other hand, the inspection can be voluntarily completed to ease burden of the results by inspection or equivalent level to this inspection method. Also, it may need improved construction supervision and performance test system to minimize the occurrence of the nature defects in installing the facilities as well as the upgrade program for the facilities during intervals of inspection period.

• Journal of the Korean Society of Physical Medicine
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• v.6 no.4
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• pp.415-424
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• 2011

연구목적 : 본 연구는 볼기신경 뿌리병증 환자에 대하여 역학적 스트레스인 압박과 긴장을 가하여 환자의 증상을 나타내 신경동역학적 검사간의 상관관계를 수행하였다. 연구방법 : 신경동역학검사인 하지직거상검사, 수정된 활시위검사, 슬럼프검사에 앞서 방사선과 전문의에 의해 자기공명영상 판독을 실시하여 허리원반 이탈로 진단받은 다리쪽으로 방사통을 호소하는 21명의 환자가 참여 하였다. 수집된 자료는 질적변수에 따른 빈도와 비율은 교차분석표로 작성하였고, 신경동역학적 검사간의 상관관계를 검정하기 위해 피어슨의 카이스퀘어(Pearson's chi-square)을 시행하였다. 연구결과 : 허리 자기공명영상 결과, 증상에 대한 두 검사 간 교차표를 작성하여 하지직거상검사와 수정된 활 시위검사, 하지직거상검사와 슬럼프검사는 유의한 상관관계는 없었지만(p>.05) 수정된 활시위검사와 슬럼프검사는 통계적으로 유의한 상관관계(p<.05)가 제시되었다. 결론 : 볼기신경 뿌리병증 환자에 대한 신경동역학검사인 수정된 활시위검사와 슬럼프검사가 통계적으로 유의한 상관관계를 나타내는 증거를 제공하였다. 신경동역학 검사는 신경계에 역학적 스트레스 즉, 긴장, 활주, 또는 압박 자극을 주어 신경기능이상 환자에 대해 적절한 검사를 제시하였다.

• Korean Journal of Clinical Laboratory Science
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• v.49 no.4
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• pp.366-373
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• 2017

Urinalysis is considered to be easier and simpler than other tests. It has been known to cause no burden to patients, while offering important information on diagnosing, treating, and determining the prognoses of kidney and urinary tract diseases. Urinary sediments are usually performed by microscopic examination of centrifuged urine by technologist. The guidelines proposed by the Korean Association of External Quality Assessment Service are actually different from those actually practiced by medical institutions and taught to biomedical students in textbooks. Therefore, we verified whether different sediment preparation methods lead different test results. Specimens that tested positive from the occult blood and leukocyte esterase in the urine dipstick test were randomly selected for a microscopic examination. The differences in the urine sediment preparation affected the sediment concentrations, which influenced the cell grade and cell number per HPF. The first factor in determining the sediment concentration is the centrifugal force. Many medical institutions use 1,500 rpm as the centrifugal speed without considering the radius of the centrifuge; such a value may not be accurate for 400 G. Consequently, there were differences in urine concentrations, which influenced the results. The second factor is the amount of sediment in urine. Different amounts of the remaining supernatant led to different sediment concentration factors, again, causing different results. Furthermore, not only by using a pipette to obtain an accurate amount as stipulated, but also by roughly obtaining a drop, the microscopic examination using such a volume of sediment examined affected the results. Therefore, this study highlights the importance of standardization of urine sediment preparation procedures to promote consistency and accuracy across institutions.

• Journal of Korean Ophthalmic Optics Society
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• v.13 no.4
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• pp.109-114
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• 2008

Purpose: To assess the reproducibility and repeatability for each color vision test method. Methods: The subjects for color vision test were 30 students without congenital color vision deficiency and they major in optometry in a university, Korea. The type of color vision test selected for this study were Hans color vision test, Hans 15 hue test and Lanthony D 15 hue test. The Ishihara test was added for assessment of reliability of inter-tester. Results: All of the subjects were classified into normal at pseudoisochromatic plates, but one subject's result showed mild blue-yellow color deficiency at Hue discrimination. Results of 3 repeated test for subjects and inter-tester examination showed no errors at pseudoisochromatic plates. There were differences in mild errors among repeated test at Hue discrimination, but no differences were found in the results of repeated test to classify color vision deficiency. Conclusion: Each tester had better be more skilled to test even simple color vision test for eliminating the possibility of mild errors. Each subject might just as well be careful in color vision test. It is required to test both method of pseudoisochromatic plates and Hue discrimination in screening test.

• The Korean Journal of Nuclear Medicine Technology
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• v.13 no.3
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• pp.181-184
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• 2009

Purpose: Automated system that immunoassay examination are used widely. However, sample to sample carryover can cause that the next patient sample is false positive. Materials and Methods: We test HBs Ag, HBs Ab, HBc Ab(IgG) with Automated pipetting system (Tecan). It was placed with very high concentrations followed by saline solution. During this experiment, The fixed tip of Automated system wash With 0.25 moL/L NaOH. The Measurement results of saline solution confirm the occurrence of carryover. Results: Results of saline solution with 0.25 moL/L NaOH cleaning process was measured 100% negative, And results of patient serum with 0.25 moL/L NaOH cleaning process is similar reported results. Conclusion: As Results, 0.25 moL/L NaOH cleaning process was avoid carryover in experiment, And we know results of the hepatitis test did not affected by this solution we recommend 0.25 moL/L NaOH cleaning process as the Prevention of carryover in the automated system with fixed Tips.

• Journal of the Institute of Convergence Signal Processing
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• v.25 no.1
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• pp.15-20
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• 2024

In the field of ship inspection in South Korea, due to outdated workflow processes, there is a possibility of tampering with inspection results. Accordingly, research is being conducted to prevent tampering with inspection results by introducing blockchain technology and cloud-based systems that allow real-time tracking and sharing of data, and to establish a transparent and efficient communication system. In this study, unit and integrated processes for overall data management and inspection execution related to ship inspection were implemented to automatically collect, manage, and track various inspection results occurring during the ship inspection process. Through this, it aimed to increase the efficiency of the ship inspection process overall, inducing growth in the ship inspection industry as a whole. The implemented web portal reached a level where trend analysis and comparative analysis with other ships based on inspection results are possible, and subsequent research aims to demonstrate the excellence of the system.

• Proceedings of the Korean Information Science Society Conference
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• 2000.04a
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• pp.139-141
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• 2000

검사점 및 복구 도구는 응용 프로그램의 상태를 주기적으로 안정된 저장소에 저장을 하고, 결함이 발생하였을 경우 가장 최근의 검사점으로부터 효율적으로 복구하게 하는 도구이다. 특히 검사점 및 복구 도구는 장시간 수행되는 프로세서에게는 아주 중요한 의미를 지니며, 결함으로 인해 장시간 수행되는 프로세스에 의해 생성된 중간 결과를 잃어버리지 않게 한다. 본 논문에서는 UnixWare 커널 수준의 검사점 및 복구 도구인 Kckpt의 설계 및 구현 내용을 제시하고, Kckpt의 성능을 사용자 수준에서 구현한 검사점 라이브러리와 비교한 결과를 제시한다. Kckpt를 사용함으로 해서 UnixWare는 소스 코드 수준에서 사용자가 초기화한 장소에서 검사점을 만들 수 있을 뿐만 아니라 실행 가능한 파일만을 가진 사용자에게도 완전한 투명성을 제공할 수 있다. 또한 Kckpt를 사용자 라이브러리 수준에서 구현한 검사점 도구와 성능을 비교한 결과 오버헤드가 훨씬 줄어들었음을 관찰할 수 있었다.

• Clinical and Experimental Reproductive Medicine
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• v.23 no.1
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• pp.73-79
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• 1996

골수나 유산물질에 대한 세포유전학적 검사에 있어 통상적인 염색체검사는 검사에 적합한 중기핵상을 얻기 어려워 실패하는 경우가 많다. 이러한 경우에 진단이나 치료에 도움을 줄 수 있는 방법으로 유식세포분리기를 사용하여 단일 세포내 DNA량에 따른 aneuploidy를 추적할 수 있는 가를 확인하기 위해 본 실험을 실시하였다. 79 (혈액 30, 골수 37, 유산물 12)예에서 염색체 검사와 유식세포 분리검사를 동시에 실시하여 각각의 결과를 비교한 결과 79.7% (63/79)의 일치율을 얻었다. 그러나 염색체의 손실이 없는 전좌와 역위의 경우는 물론 작은 조각의 염색체 부분이 늘어나거나 줄어든 경우에 있어서는 유식세포분리방법에 의해서 추적되지 못하였지만, 염색체 검사의 결과를 얻는데 실패한 경우에는 유식세포분리방법이 DNA량의 변화에 대한 정보를 얻을 수 있다는 것을 확인할 수 있었다. 따라서 본 연구결과는 세포유전학적 검사에서 유식세포분리방법이 염색체 검사보다 신속하며 염색체검사가 불가능한 시료에서도 DNA양에 따른 aneuploidy의 추적이 가능하다는 것을 시사한다.

• Korean Journal of Clinical Laboratory Science
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• v.55 no.4
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• pp.276-283
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• 2023

The Occupational Safety and Health Research Institute is currently evaluating spirometry tests used for worker health examinations by applying the 2005 American Thoracic Society (ATS) and European Respiratory Society (ERS) spirometric test standardization guide and reviewing the application of the 2019 ATS/ERS guide. To compare results obtained using the new evaluation criteria with previous results and determine whether it is appropriate to apply them to Korean workers' health examinations, we reviewed spirometry results from 325 special health examination institutions. Although evaluation criteria such as extrapolation volume, correction error, and forced inspiratory vital capacity were applied more strictly, institutions had higher reliability scores. Primarily because the acceptability and repeatability of forced expiratory volume in 1 second and forced vital capacity were judged separately, and thus, deduction width was reduced. The study shows that adopting the new evaluation criteria would reduce the possible use of inappropriate data, increase tester and doctor understanding of result selection and interpretation, increase result reliability, and reduce the testing burden.