• 한국산학기술학회논문지
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• 제11권1호
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• pp.175-181
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• 2010

본 논문에서는 H.264 방식의 full HD실시간영상압축을 위한 율제어 모듈의 새로운 구조를 제안한다. 제안된 구조에서는 각 매크로블록 라인(full HD의 경우 120 매크로 블록, CIF 의 경우 22 매크로 블록)을 따라 율제어 알고리즘을 사용함으로서 QP 가 변경된다. JM의 H.264 율제어 알고리듬에는 복잡한 산술연산과 부동 소숫점 연산을 가지고 있기 때문에, 정수형 산술 CPU 를 통한 율제어 알고리듬의 구현은 불가능하다. 따라서 우리는 부동 소숫점 연산 유닛을 채용하고, 이 부동소숫점 연산 유닛을 이용하여, 율제어 알고리듬을 구현하였으며, 이 하드웨어를 통하여 실시간에 동작할 수 있음을 확인하였다.

• Genomics & Informatics
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• 제20권4호
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• pp.46.1-46.7
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• 2022

Influenza A virus (IAV) is the most widespread pathogen causing human respiratory infections. Although polymerase chain reaction (PCR)-based methods are currently the most commonly used tools for IAV detection, PCR is not ideal for point-of-care testing. In this study, we aimed to develop a more rapid and sensitive method than PCR-based tools to detect IAV using loop-mediated isothermal amplification (LAMP) technology. We designed reverse-transcriptional (RT)-LAMP primers targeting the hemagglutinin gene. RNAs from reference H1N1 and H3N2 showed specific RT-LAMP signals with the designed primers. We optimized the reaction conditions and developed universal reaction conditions for both LAMP assays. Under these conditions, the detection limit was 50 copies for both RT-LAMP assays. There was no non-specific signal to 19 non-IAV respiratory viruses, such as influenza B virus, coronaviruses, and respiratory syncytial viruses. Regarding the reaction time, a positive signal was detected within 25 min after starting the reaction. In conclusion, our RT-LAMP assay has high sensitivity and specificity for the detection of the H1 and H3 subtypes, making it suitable for point-of-care IAV testing.

• 전자공학회논문지
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• 제53권2호
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• pp.117-122
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• 2016

최근 환경, 의료분야에서 실시가 검출 및 인체 삽입형 pH 센서에 대한 요구가 증가하고 있다. 이에 본 연구에서는 생체적 합성이 우수한 그래핀을 이용하여 실시간 pH 검출이 가능한 센서를 개발하였다. Polyethylene terephthalate(PET) 기판에 전사된 그래핀 표면에 이온 용액속에서 동작하는 전계효과 트랜지스터(solution-gated field-effect transistors; SGFETs)를 제작하였으며 이를 이용하여 이온 용액의 pH를 검출하였다. 제작한 트랜지스터의 게이트 채널 길이는 $500{\mu}m$, 게이트 채널 폭은 8mm이다. 이온 용액속에서 트랜지스터 동작특성 및 pH 감도를 평가하기 위하여 드레인-소스 전압($V_{DS}$)에 따른 드레인-소스 전류($I_{DS}$) 및 게이트-소스 전압($V_{GS}$)에 따른 드레인-소스 전류($I_{DS}$)를 측정하였다. PET기판에 전사된 그래핀 위에 제작한 그래핀 SGFETs의 전류-전압 특성은 이온 용액내에서 매우 안정적으로 동작하였으며 그래핀 SGFETs의 Dirac point는 이온 용액의 pH값이 증가함에 따라 양의 방향으로 19.32 mV/pH씩 증가하였다.

• Asian Pacific Journal of Cancer Prevention
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• 제13권11호
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• pp.5659-5663
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• 2012

To investigate the expression of hPOT1 in the HeLa cell line and screen point mutations of hpot1 in different tumor tissues a two step osmotic method was used to extract nuclear proteins. EMSA was performed to determine the expression of hPOT1 in the HeLa cell line. PCR was also employed to amplify the exon14 sequence of the hpot1 gene in various of cancer tissues. A SV gel and PCR clean-up system was performed to enrich PCR products. DNAStar was used to analyse the exon14 sequence of the hpot1 gene. hPOT1 was expressed in the HeLa cell line and the signal was gradually enhanced as the amount of extracted nuclear proteins increased. The DNA fragment of exon14 of hpot1 was successfully amplified in the HeLa cell line and all cancer tissues, point mutations being observed in 2 out of 3 cases of endometrial cancer (66.7%) despite the hpot1 sequence being highly conserved. However, the sequence of hpot1 exon14 do not demonstrate point mutations in most cancer tissues. Since hPOT1 was expressed in HeLa cell and the probability of gene point variants was obviously higher in endometrial cancer than other cancers, it may be involved in the pathogenesis of gynecological cancers, especially in cervix and endometrium.

• Journal of Periodontal and Implant Science
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• 제31권3호
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• pp.625-631
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• 2001

The anatomic structure around interproximal area plays an important role not only in the natural teeth, but also in the implant. The loss of papilla can lead to cosmetic deformity, phonetic problem, food impaction on the anterior dentition, and masticatory problem, food impaction and proximal caries on the posterior dentition. The purpose of this study was to evaluate the relationship between interdental papilla existence and distance from contact point to alveolar crest in Korean posteior dentition. 45 Korean adult patients(31males, 14 females) participated in this study. Measurements were carreid out total 126 interproximal areas, 18 first premolar, 31 second premolar, 40 first molar, and 37 second molar areas. Papilla index was recorded as suggested by Jemt. Distance between contact point and alveolar crest measrued by Florida $probe^{R}$, after flap elevation. Each distance was measured 10 times by every 0.1mm unit. The results showed that the mean Papilla index 1.37 and mean distance between contact point and alveolar crest was 7.44mm. The correlation between the Papilla index and distance was high negative correlation(Pearson correlation=-0.47), and it was statistically significant(P=0.000) When the distance between contact point and alveolar crest was 5mm, the loss of papilla was appeared almost in half cases. When the distance was 6mm, the papilla loss was present 95%, when 7mm, the papilla loss was 100%.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2008년도 춘계학술대회 논문집
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• pp.533-534
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• 2008

• 한국초전도학회:학술대회논문집
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• 한국초전도학회 2001년도 High Temperature Superconductivity Vol.XI
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• pp.23-23
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• 2001

• 대한수학회논문집
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• 제13권1호
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• pp.29-36
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• 1998

We show that if M is a $II_1$-factor and a countable discrete group G acts outerly on M then Jones' index $[M:M^G]$ of a pair of $II_1^-factors is equal to the order $\mid$G$\mid$ of G. It is also shown that for a subgroup H of G Jones' index $[M^H:M^G]$ is equal to the group index [G:H] under certain conditions.

• 천문학회보
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• 제37권1호
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• pp.74.1-74.1
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• 2012

It is known that the diffuse H${\alpha}$ halos around bright H II regions are more extended than the dust-scattered halos around point sources and the line ratios [S II] ${\lambda}$6716/H${\alpha}$ and [N II] ${\lambda}$6583/H${\alpha}$ observed outside of bright H II regions are generally higher than those in H II regions. These observational facts have been regarded as evidence against the dust-scattering origin of the diffuse H${\alpha}$ emission and the effect of dust-scattering has been neglected in studying the diffuse H${\alpha}$ emission. In this paper, we find, however, that dust-scattered halos of H II regions should be more extended than those of point sources and is in good agreement with the observed H${\alpha}$ profiles around H II regions. We also found that the observed line ratios [S II]/H${\alpha}$, [N II]/H${\alpha}$, and He I ${\lambda}$5876/H${\alpha}$ in the diffuse regions can be well reproduced with the dust-scattered halos around H II regions which are photoionized by late O- and/or early B-type stars in the interstellar medium with the abundances close to those of the warm neutral medium. Therefore, we conclude that the diffuse H${\alpha}$ emission may originate mostly from the dust-scattering.

• 대한화학회지
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• 제6권1호
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• pp.29-31
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• 1962

電壓條件 永動時間 및 支持電解質溶液의 pH가 Al ion의 paper electrophoresis에 미치는 影響을 closed horizontal type의 泳動裝置를 써서 Michaelis buffer soln.으로 飽和시킨 paper strip에서 實驗的으로 檢討하였다. 그 結果 Al ion에 가장 適合한 pH, 電壓 및 泳動時間을 決定하였으며 pH=2.38에서 Al ion의 mobility는 $(1.004{\pm}0.0020){\times}10^{-4}\;cm^2\;sec^{-1}\;volt^{-1},\;Al(NO_3)_3\;soln.$의 isoelectric point는 pH=3.23 임을 알았다.