• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2013.10a
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• pp.385-386
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• 2013

우리나라 해역에서 선박의 대형화, 고속화와 선박교통량의 증가 및 항만과 해양개발 등으로 해상교통 환경은 급속하게 변화하고 있으며, 항로의 좌 우 측방 한계 표시, 항행위해요소의 표시 등의 용도로 사용되는 등 명기는 항만, 연안해역 및 내륙수로에서 통항 선박의 안전을 위하여 그 수요가 점진적으로 늘어나고 있다. 항로표지에 사용하는 등명기의 정기검사는 항로표지법 제31조 및 "항로표지용장비 용품검사기준(해양수산부고시 제2013-101호, 2013.5.8)"에 따라 3년 주기로 수검하여 합격품에 한하여 사용토록 규정하고 있다. 등명기의 정기검사 유효기간에 대한 검증을 위하여 설치장소, 해상여건 등을 고려한 현장시험을 통하여 등명기의 사용 기간에 따른 열화 특성을 조사하고 적정 정기검사주기 및 교체 주기에 대한 분석의 필요성이 대두되고 있는 실정이다. 본 연구에서는 LED 등 명기의 실제 사용 환경에서 사용 경과 시간에 따른 광학적 특성, 전기적 특성 및 외관상태 등을 조사하고 분석하여 사용시간 경과에 따른 LED 등명기의 특성 변화에 대하여 기술하였다.

• Journal of Korea Water Resources Association
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• v.54 no.spc1
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• pp.1071-1081
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• 2021

In addition to the current quality control procedures for the weather observation performed by the Korea Meteorological Administration (KMA), this study proposes quality inspection standards for Internet of Things (IoT) urban weather observed data based on machine learning that can be used in smart cities of the future. To this end, in order to confirm whether the standards currently set based on ASOS (Automated Synoptic Observing System) and AWS (Automatic Weather System) are suitable for urban weather, usability was verified based on SKT AWS data installed in Seoul, and a machine learning-based quality control algorithm was finally proposed in consideration of the IoT's own data's features. As for the quality control algorithm, missing value test, value pattern test, sufficient data test, statistical range abnormality test, time value abnormality test, spatial value abnormality test were performed first. After that, physical limit test, stage test, climate range test, and internal consistency test, which are QC for suggested by the KMA, were performed. To verify the proposed algorithm, it was applied to the actual IoT urban weather observed data to the weather station located in Songdo, Incheon. Through this, it is possible to identify defects that IoT devices can have that could not be identified by the existing KMA's QC and a quality control algorithm for IoT weather observation devices to be installed in smart cities of future is proposed.

• The Journal of Korean Orthopaedic Ultrasound Society
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• v.3 no.1
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• pp.38-46
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• 2010

The lesions around hip joint including bone, joint and soft tissue can cause the pain. For diagnosis of these lesions, physical examination and simple X-ray were accomplished primarily. Some special cases, CT or MRI was a useful tool. However ultrasonography could provide non-invasive and dynamic images for the lesions of tendon and bursa, and it could be a useful tool for follow up after hip surgery. Due to the deep location of hip joint, ultrasonography is not easy for physician to examine and its application was impossible in some obese patients. This article deals with the normal and pathologic ultrasonographic findings of the hip joint and various applications using ultrasonography.

• Biomedical Science Letters
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• v.2 no.2
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• pp.199-209
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• 1996

A new test strip to detect leukocytes using the myeloperoxidase in urine was developed. The reagent strip contains tetramethylbenzine, glucose and glucose oxidase. The detection limit was between 10 cells per 1$\mu$l urine(5 cells/hpf), showing greenish yellow color in the range of 10-25 cells/$\mu$l, green color in the range of 75-250 cells/$\mu$l, greenish blue color in the range of 500 cells/$\mu$l. The result can be obtained within two minute. The performance of the new method was evaluated by comparing the results of microscopic examination and other commercial products. Good correlations were shown between the values obtained by our urine strip and those by other commercial products with 172 urine samples. The results were proven that new methods were useful as primary screening reagents to detect leukocytes in urine.

• The Journal of Korean Association of Computer Education
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• v.7 no.4
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• pp.15-25
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• 2004

Previous researches on the effect of programming learning upon logical thinking ability have used a standardized test to measure logical thinking ability in the general and comprehensive aspect after programming learning. Considering that the areas of intelligence are separated from one another and work independently, the existing standardized tool to measure general and comprehensive logical thinking ability has a limitation in measuring a logical thinking ability required at specific areas. Thus this study extracted logical thinking and its sub-factors related to computer programming and suitable for the level of cognitive development through analyzing standardized test sheets at home and abroad, and developed logical thinking test I and II of the same form according to a development procedure model. The result of verifying the developed logical thinking tests proved that the two tests are logical thinking tests of the same form. The developed tests can be utilized in identifying the effect of programming learning upon logical thinking and its sub-factors.

• The Journal of the Korea Contents Association
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• v.21 no.1
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• pp.465-474
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• 2021

Corona-19, a disease caused by 'Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2)', was declared a global pandemic by the World Health Organization (WHO) in March 2020, and a real-time polymerase chain reaction test is performed as a diagnostic test for screening and confirmation in most countries. However, not only the target genes and protocols differ by countries, but also the procedures for reading the diagnosis results are diverse, so the criteria for confirmed patients differ by country. Therefore, in this review, we discussed the target genes, test techniques, and diagnostic criteria for each country notified by WHO. And the specificity and sensitivity, limits of detection, positive and negative controls, false positive bacteria candidates, and specimens, and the specifics of the control setting were also described. In addition, the characteristics of Korea's test were compared to each country's one. Finally, in order to obtain the same diagnosis result for SARS-CoV-2 in the future, standardized diagnosis methods and result interpretations for Corona-19 diagnosis were proposed.

• Journal of Broadcast Engineering
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• v.20 no.6
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• pp.901-911
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• 2015

Many studies tried to develop a 3D display based stereo test as a substitute for the conventional stereo test. Although many 3D monitor based stereo tests have various advantages over the conventional stereo tests with printed stimuli, they have a crucial limitation in manipulating disparity. The least value for disparity manipulation is one pixel, which is too big to screen the normal stereo acuity in pc environment with a short viewing distance. In this explorative study, a Gabor image was employed as a test stimulus, because its position can be manipulated by changing its phase information, which allows sub-pixel manipulation for disparity. Instead of employing the methods of the conventional stereo tests where measurement was made only once for each of a wide range of disparity values, 10 replications were administrated for each of 6 disparity levels. The results from the test using Gabor images were compared with those using random dot stimulus because the latter stimulus was exactly the same as that of the conventional stereo test. The correlation coefficient between two tests was found to be moderate. After one month later, the whole test was repeated in the same settings. The correlation coefficient between test and retest results from Gabor images was found to be as high as that from a random dot stimulus, implying high test-retest reliability. These results suggest that a Gabor stimulus could be used as a test stimulus for the valid and reliable stereo test, even in the limited condition, such as 3D environment with a short viewing distance and a condition for evaluating the stereo acuity very precisely.

• Research in Plant Disease
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• v.21 no.2
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• pp.74-81
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• 2015

The specific and sensitive nested-PCR method to detect Acidovorax citrulli, a causal agent of bacterial fruit blotch on cucurbitaceae, was developed. PCR primers were designed from the draft genome sequence which was obtained with the Next Generation Sequencing of A. citrulli KACC10651, and the nested-PCR primer set (Ac-ORF 21F/Ac-ORF 21R) were selected by checking of specificity to A. citrulli with PCR assays. The selected nested-PCR primer amplified the 140 bp DNA only from A. citrulli strains, and detection sensitivity of the nested PCR increased 10,000 times of $1^{st}$ PCR detection limit (10 ng genomic DNA/PCR). The nested PCR detected A. citrulli from the all samples of seed surface wash (external seed detection) of the artificially inoculated watermelon seeds with $10^1cfu/ml$ and above population of A. citrulli while the nested PCR could not detected A. citrulli from the mashed seed suspension (internal seed detection) of the all artificially inoculated watermelon seeds. When the naturally infested watermelon seeds (10% seed infested rate with grow-out test) used, the nested PCR detected A. citrulli from 2 seed samples out of 10 replication samples externally and 5 seed samples out of 10 replication samples internally. We believe that the nested-PCR developed in this study will be useful method to detect A. citrulli from the Cucurbitaceae seeds.

• Journal of Gifted/Talented Education
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• v.24 no.5
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• pp.733-755
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• 2014

This study aims to develop and validate Creative Problem Solving Profile Inventory (CPSPI) which is a scale to measure the creative thinking style, based on the CPS theory. For redeeming the limits of existing scales, this study developed an inventory which includes an evaluation for cognitive ability as well as cognitive preference and the stage to share an idea with others and persuade (Persuasion & communication stage). At the early stage, 7 factors (stages) and 82 items were developed and finally, 5 factors and 39 items were selected through item analysis and validation of construct validity. In conclusion, CPSPI will be used as an educational tool for self-development by knowing own's strengths and weaknesses in the creative problem-solving process, and help in displaying cooperative creativity by understanding other people and interaction, based on creative thinking profiles of group members.

• Convergence Security Journal
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• v.15 no.3_1
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• pp.41-51
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• 2015

Human have more complicate and skilled ability for lying even cheat ourself. It is not easy to cheat unconscious things like sweat, eyes, or voice, but if some one cheat own self, he can cheat every of that. Lie is one of the way to spread our gene and our instinct make a lie. Every living organism even bacteria or virus use similar trick to survive. In human body, there are more complicate and profound mechanism for lying like breathe, sweat, eyes, face or voice. We can control some of that and make a fake, but it can't be perfect. Human also called 'Homo Fallax' cause we have a language and skill to lie with it. In present, we can detect lie with polygraph, but it has few weakness. So we try to use Vibraimage technology for resolve it. In this paper, we describe how to use Vibraimage for lie detection and the research history.