• Journal of the Korean Chemical Society
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• v.55 no.2
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• pp.262-267
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• 2011

The denaturing high performance liquid chromatography(DHPLC) with fluorescence detector assay is very useful tool for detecting nucleic acids. Furthermore, loop-mediated isothermal amplification(LAMP) constitutes a potentially valuable tool for rapid diagnosis of pathogenic microorganisms. In this study, we evaluated the specificity, detection limit, and sensitivity of a LAMP method and DHPLC method for rapid detection of the hepatitis b virus(HBV). As a result, the LAMP assay reported here has the advantage of rapid detection whereas, DHPLC assay has more sensitivity than other assays. These findings suggest that LAMP and DHPLC assay may be good tool for rapid diagnosis of clinical HBV infection.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 1993.10b
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• pp.11-30
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• 1993

종래부터 CATV 또는 MATV시스템의 신호분기회로로 사용되어 오고 있는 Tap-off는 단지 실험적 경험적으로 제작되어 왔으며 이론적인 해석이나 엄밀한 설계법이 확립되어있지 않았기 때문에 그 성능에 있어서도 대역폭이 좁거나 분기 특성이 나쁜문제점등이 있었다 따라서 본 논문에서는 보조변성기가 부가된 변형된 약결합성 신호분기기를 제안하여 설계의 자유도를 높힘으로써 상당히 조밀한 결합간격의 회로구성이 가능한 설계법을 제안하고 그 주파수특성을 계산하여 제안한 변형된 신호분기기의 설계법의 유효함을 확인하였다.

• Proceedings of the KIPE Conference
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• 2011.11a
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• pp.159-160
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• 2011

일반적인 엘리베이터 시스템에서는 로드셀이라고 하는 센서가 설치되어 탑승자를 포함한 모터에 걸리는 전체부하를 측정한다. 그리고 이 무게 정보는 브레이크가 풀리고 엘리베이터가 움직이기 시작하기 전에 토크 전향보상을 하는데 사용되고, 엘리베이터는 브레이크 개방 과정에서 정지상태를 유지하여 엘리베이터가 부드럽게 출발하도록 한다. 안티롤백은 로드셀없이 브레이크가 열리는 동안에 위치 편차를 억제하는 기능이다. 다른 회사에서는 이 기능을 기존의 PI 제어기를 사용하여 개발하였다. 반면에 이 논문에서는 안티롤백 기능을 위하여 상태궤환 위치제어기를 사용하였으며 그 적절성을 논의한다.

• The Transactions of the Korean Institute of Electrical Engineers P
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• v.57 no.4
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• pp.412-416
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• 2008

We have developed the calibration technique of the VT comparator using nonreactive standard resistors, which evaluates both accuracy and linearity of the VT comparator by comparing experimental values with theoretical values. The correction values of VT comparator obtained by using both our method and wide ratio error VT are consistent within the expanded uncertainty. Furthermore the specification for ratio error of VT comparator have been revaluated.

• Korean Journal of Mineralogy and Petrology
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• v.35 no.3
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• pp.199-214
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• 2022

The Yeongnam Massif is one of representative basement provinces in the Korean Peninsula, which has experienced high-temperature, low-pressure (HTLP) regional metamorphism and partial melting. Here we reviewed recent developments in Paleoproterozoic (1.87-1.84 Ga) hot orogenesis of the Yeongnam Massif, typified by the granulite-facies metamorphism and partial melting recorded in the HTLP rocks. In particular, spatiotemporal linkage between the metamorphic and magmatic activities, including the Sancheong-Hadong anorthositic magma as a heat source, provides a key to understand the widespread HTLP metamorphism and partial melting in the Yeongnam Massif. Crustal anatexis, resulting from the fluid-present melting and muscovite/biotite dehydration melting, has yielded various types of leucosomes and leucogranites. Zircon and monazite petrochronology, using in-situ U(-Th)-Pb data from the secondary ion mass spectrometry, indicates that the HTLP metamorphism and anatexis lasted over a period of ~15 Ma at ca. 1870-1854 Ma. In addition, a fluid influx event at ca. 1840 Ma was locally recognized by the occurrence of incipient charnockite. Taken together, the Yeongnam Massif preserves a prolonged evolutionary record of the HTLP metamorphism, partial melting, and fluid influx diagnostic for a hot orogen. Such an orogen is linked to the Paleoproterozoic orogeny widespread in the North China Craton, and most likely represents the final phase of crustal evolution in the Columbia/Nuna supercontinent.

• The Journal of the Petrological Society of Korea
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• v.26 no.4
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• pp.385-398
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• 2017

Jiri Mountain lies in the southwestern portion of the Yeongnam massif, which is one of the Precambrian basement massifs of the Korean Peninsular, consisting essentially of high-grade metamorphic rocks. The geology of the area mainly consists of Paleoproterozoic metasedimentary migmatitic gneisses, granitic gneisses which are classified into granitic gneiss, (K-feldspar porphyroblastic) granitic gneiss and quartzo-feldspathic gneiss, charnockite and anorthosite based on their occurrence and petrographic characteristics. The ages obtained from these rocks mainly span a narrow range between ca. 1,876 and 1,856 Ma although inherited cores of zircons from massive granite gneiss yielded much older age spectrum (>2,029 Ma). The age of major metamorphism is ca. 1850-1840 Ma and the metamorphic condition obtained from mineral assemblages and geothermobarometers is about 4-6 kb and up to $700-750^{\circ}C$. These results indicate that in the area intense granitic magmatism and metamorphism occurred in the deep crust during Paleoproterozoic orogeny. Some younger age of charnockite (1,856-1,865 Ma) and anorthosite (1,861-1,862 Ma) might indicate the beginning of intraplate rifting leading to felsic and mafic magmatism just after the orogeny. In conclusion, the rocks in the Jiri Mountain area which formed at a mid to deep crustal zone provide us windows into the deep crust.

• Journal of Digital Convergence
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• v.19 no.10
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• pp.535-543
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• 2021

The aim of this study was to evaluate the correlation between senile eye diseases such as age-related macular degeneration (AMD), glaucoma and oral health behaviors. Data from the Seventh Korea National Health and Nutrition Examination Survey (KNHANES VII-2) were used to analyze oral health behaviors according to the presence of AMD and glaucoma. Demographics and oral behaviors were analyzed using the complex chi-square test and complex logistic regression to compare participants with AMD and glaucoma with those without AMD and glaucoma. According to the presence or absence of AMD and glaucoma, there were statistically significant differences in age, education level, oral care product use, and difficulty in speaking variables. The results of this study provide evidence of a significant association in some variables between oral behaviors and senile eye diseases.

• Proceedings of the Korean Fiber Society Conference
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• 2007.11a
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• pp.499-500
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• 2007

• The Korean Chronic Disease News
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• no.94
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• pp.6-7
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• 1988

중년 이후에는 대부분의 사람이 생리적인 노화현상의 일환으로 시력의 사용에 불편을 느끼게 되며 때로는 중년이후에 잘 발생하는 질환에 의하여, 심한 시력장애를 일으키는 수도 있다. 전자의 경우에는 노안, 비문증 등을 들 수 있고 후자의 경우는 백내장, 당뇨병성망막증, 망막정맥폐쇄증, 황반부 변성등을 들 수 있다.

• Communications of the Korean Institute of Information Scientists and Engineers
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• v.26 no.10
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• pp.82-86
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• 2008