• 한국컴퓨터정보학회논문지
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• 제21권11호
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• pp.23-30
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• 2016

In this paper, we propose an adaptive histogram projection technique for dynamic range compression and an efficient detail enhancement method which is enhancing strong edge while reducing noise. First, The high dynamic range image is divided into low-pass component and high-pass component by applying 'guided image filtering'. After applying 'guided filter' to high dynamic range image, second, the low-pass component of the image is compressed into 8-bit with the adaptive histogram projection technique which is using global standard deviation value of whole image. Third, the high-pass component of the image adaptively reduces noise and intensifies the strong edges using standard deviation value in local path of the guided filter. Lastly, the monitor display image is summed up with the compressed low-pass component and the edge-intensified high-pass component. At the end of this paper, the experimental result show that the suggested technique can be applied properly to the IR images of various scenes.

• 한국시뮬레이션학회논문지
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• 제6권1호
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• pp.53-60
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• 1997

Results from a nonequilibrium molecular dynamics (NEMD) simulation are presented for an argon liquid subject to a shear flow. The segmented molecular dynamics method and the subtraction technique used in NEMD program to reduce the thermal fluctuation noise in data are studied with different shear rates. The standard deviation in the shear stress reduced from 0.030 to 0.004 by the segmented molecular dynamics method for 50 repeated segments. On the other hand, the standard deviation of the data remained the same when the subtraction technique was applied, where as the results of shear stress by constant value in a random way.

• 대한전기학회논문지:전력기술부문A
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• 제48권8호
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• pp.1031-1036
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• 1999

A Hierarchical vector Quantization scheme is implemented and an optimal thresholding technique of quadtree segmentation for performing high quality low bit rate image compression is proposes. A mathematical model is constructed under the assumption that the standard deviations of sub-blocks are larger than or equal to the standard deviation of the upper level block which is generated by merging of sub-blocks. This thresholding technique based on the mathematical modeling allows producing about 1 dB improved performance in terms of PSNR at most ranges of bit rates over the quadtree coder, which is based on MSE for quadtree segmentation.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1991년도 추계학술대회 논문집
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• pp.105-109
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• 1991

A computer aided flatness calibration system has been developed. Rectangular grids based measurement procedure is proposed with closing error technique. giving advantages over conventional diagonal measurement procedures (‘Union Jack’). A new analysis technique has been developed for flatness evaluation called ‘ETT(Enclose Tilt technique)’, enabling minimum separation definition which is acknowledged as standard term for flatness definition. Practical assessment shows the performance of the developed system.

• 한국지구과학회지
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• 제27권5호
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• pp.521-527
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• 2006

CHIME 연대측정을 위한 전자현미분석(EPMA)에서는 통상적으로 핵 연료 물질 등 구하기 어렵고 관리에 민감한 표준 물질을 사용하므로 이를 구하지 못하는 실험실에서는 적용에 어려움이 있다. 이 연구에서는 이러한 표준 물질을 대신할 수 있는 새로운 실험실 표준법을 제시한다. CHIME 연대 측정이 원활하게 이루어지고 일련의 표준 물질이 잘 구비된 실험실에서 X선 세기가 균질함이 확인된 모나자이트와 같은 광물편을 대상으로 보정 상수를 정확히 구하고, Th, U 등의 특성 X선 세기를 측정해두면, 다른 실험실에서는 단지 광물편의 특성 X선 세기를 측정하는 것만으로 바로 사용할 수 있는 표준 물질로 활용할 수 있다. 이 기법은 전자 현미 분석에서 화학성분과 X선 간섭 보정 계수의 결정에 필요한 표준 물질로 모두 활용이 가능하며, 광물 표준 물질의 복잡한 화학 성분에 대해 독립적이다.

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2007년도 추계학술대회 논문집
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• pp.106-108
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• 2007

• 한국의류학회지
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• 제30권4호
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• pp.542-553
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• 2006

The purpose of this study were to analyse of craniofacial shape by 3D and to develope of head models for Korean adults with gender and age groups. The 3D measurement technique adapted in this study was a novel approach compared that the same technique has been commonly used in measuring human bodies. The data and the model of head analysis can be used as a basic reference in developing various head related items such as hat, helmet, gas mask, ear phone, and etc. In this study, heads of 836 Korean adults were measured in 3D, analyzed by statistical methods, and modelized in 3D by gender and age groups. From the basic statistical data analysis, vertex-tragion and the length between the pupils were the longest in their twenties for both men and women, and grew shorter in elderly groups. In all categories, a significant difference appeared between men and women in their 20's, but the differences were less noticeable in elderly groups. Compared to the one size standard head model of the Korea Occupational Safety and Health Agency, the above three-dimensional standard head model would provide a more through fit because gender and age groups were sub-divided and analyzed in 3D.

• 대한간호학회지
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• 제18권3호
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• pp.257-268
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• 1988

The purpose of this study was to compare the effect of the Z-track intramuscular injection technique with the effect of the stand and intramuscular injection technique on the severity of discomfort and leasions at the injection site. The subjects of the study were 20 patients with only early tuber culosis excluding another abnormalities (a akin rash, allergy to topical use of alcohol, jaundice, edema, neurosensory abnormality, coagulation defects, obesity and thin). Data collection was done from Feb. 1 to March 15, 1988 by means of Korean Pain Measurement Tool, Visual Analogue Scale, and Objective measures of injection site lesions. The results of this study were as follows ; 1) Hypothesis 1 ; “The severity of subject discomfort is less following administration of the Z-track intramuscular injection technique than following administra tion injection technique.” was not sopported 2) Hypothesis 2 ; “The degress of severity subject discomfort is less following administration of the Z-track intramuscular injection technique than following administra tion of the standard intramuscular injection technique.” was not supported. 3) Hypothesis 3 ; “The severity of injection site lesions is less following administra tion of the Z-track intramuscular injection technique than following administration of the standard intramuscular injection techniques.” was not supported. 4) The terms that were selected included factor II (mild-moderate pain) of Ratio Scale Measuring Pain using Korean Pain Terms. In conclusion ; it was found that there was not a difference from the severity of subject discomfort between two groups, but the degress of severity of subject discomfort about following administration of the Z-t-rack intramuscular injection was tended to be declined. Therefore further studies suggest that the Z-track intramuscular injection technique can decrease the severity of discomfort in persons receiving frequently intramuscular injections. First of all, it is necessery to be developed an effective tool of discomfort measurement for the intramuscular injection in Korean.

• 구강회복응용과학지
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• 제39권1호
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• pp.45-51
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• 2023

치근단 수술의 성공 여부는 적절한 역충전 재료와 충전 기법을 선택하여 근단부를 밀폐하는 데 달려있다. 역충전 재료는 확실한 밀폐를 제공하고 양호한 치유를 얻기 위하여 여러가지 물리화학적 특성들이 요구되는데 현재까지 MTA는 기존의 재료들이 가지지 못한 전례없는 우수한 장점을 갖추어 역충전 재료의 gold standard로써 사용되어 왔다. 그러나 이러한 MTA도 경화시간이 길고 조작이 어렵다는 단점이 있어 최근에는 이러한 단점을 개선한 premixed putty type bioceramic material이 개발되었다. 또한 이러한 재료를 활용하여 역충전 와동을 효율적으로 충전하기 위한 'Lid technique'이 함께 제안되었다. 본 증례 보고는 치근단 수술에서 premixed putty type material과 Lid technique을 활용한 증례에 대하여 소개하고자 한다.

• 한국재난정보학회 논문집
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• 제16권4호
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• pp.784-795
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• 2020

연구목적: 본 연구는 기업재난관리표준에 규정하고 있는 위험평가 절차에 대하여 연구하고자 한다. 연구방법: 기업재난관리표준에 정하고 있는 위험평가 단계별 요구사항을 파악하고, 'A'기관과 협력사의 적용사례를 검토하였으며 요구사항에 맞는 위험평가 절차를 도출하였다. 연구결과:기업재난관리표준의 요구사항인 위험 시나리오 도출 방법과 절차에 대하여 명확히 정의하고, 위험 시나리오 도출을 위한 표준화된 절차 도입이 필요한 것으로 검토되었다. 결론:발전 연료수급업무에 대하여 시스템 이론에 기반한 STPA 기법을 적용하여 위험 시나리오를 도출하는 방법을 구현하였으며, 모든분야의 핵심업무에 대한 위험 시나리오 도출에 적용할 수 있도록, STPA 기법을 재해경감활동계획 수립을 위한 위험 시나리오 도출 기법으로 기업재난관리표준에 반영할 것을 제시하였다.