• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 하계학술대회 논문집 C
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• pp.2081-2082
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• 2000

서강대교와 같은 장경간 교량에 초고압 전력케이블을 설치하는 경우에는 교량의 큰 신축을 흡수하기 위하여 케이블을 장대옵셋으로 설치하는 것이 불가피하게 되고, 장대옵셋 케이블이 균등하게 변형할 수 있도록 신축균등흡수장치를 실증시험을 통하여 국내에서 최초로 개발하고 154kV 중여T/L 구간중 서강대교에 총12기를 설치 완료하였다. 본 고에서는 그 개요를 소개하고자 한다.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
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• pp.799-802
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• 2004

In this paper, the active backlight control technology with data processing algorithm was developed in order to improve image quality for IPS-mode LCD-TV applications. The image blinking problem caused by repeatedly abrupt change of the backlight luminance was solved by algorithms-Fba(Flexible Boundary algorithm) and Cfa(Cumulative Feedback algorithm)-and the optimized number and space of backlight dimming steps based on perception. In the IPS-mode 42" TFT-LCD panel, the dynamic contrast ratio can be more than twice the typical level by means of lower block luminance and higher white luminance. Additionally, Power consumption and LCD temperature was decreased.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.II
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• pp.944-947
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• 2005

Highly stable gate driver circuit using a-Si TFT has been developed. The circuit has dual-pull down structure, in which bias stress to the TFTs is relieved by alternating applied voltage. The circuit has been successfully integrated in 4-in. QVGA and 14-in. XGA TFT-LCD with a normal a-Si process, which are stable for over 2,000 hours at $60^{\circ}C$. The enhancement of stability of the circuit is attributed to retarded degradation of pull-down TFTs by AC driving.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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• pp.1247-1249
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• 2009

We have successfully developed the 22 inch WSXGA+ DLS(Data Line Sharing) Panel driving in 75 Hz. In the large size and high resolution panels, it is very difficult to design the DLS Panels without failure because of the very short charging time and the large signal delay. So, we first investigated the charging order to find the most adequate charging type to the large size and high resolution panels. And then, we optimized the design of DLS in terms of improving the charging properties using the technologies of the Delta-doping TFTs, Cu metal electrodes and optimization of panel design value and the circuit signal timing.

• Archives of Pharmacal Research
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• 제22권2호
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• pp.157-164
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• 1999

LB50016 was characterized as a selective and potent$ 5-HT_{1A}$ receptor agonist and evaluate it anxiolytic and antidepressant activities. It shows high affinity for $ 5-HT_{1A}$receptor, moderate affinity for $\alpha$2 adrenergic and $ 5-HT_{2A}$receptors and no significant affinity for other receptors tested. Hypothermia and increased serum corticosterone level were observed in LB50016-treated rats, which are mediated mostly by post synaptic $ 5-HT_{1A}$ receptor activation. In the mouse forced swim model for depression, LB50016-elicited dose-dependent reductions in immobility time, showing $ED_{50}$ of approximately 3 mg/kg i.p., which was blocked by pretreatment of NAN-190, $ 5-HT_{1A}$antagonist. In face-to-face test for anxiolytic activity in mice, estimated $ED_{50}$ was 2 mg/kg, i.p.. In isolation-induced aggression test with mice, fifty-fold increases in latency to attack were observed at 30 min and last up to 4 h after LB50016 treatment (3 mg/kg, i.p.). Taken together, LB50016-induced pharmacological activities are mediated by activation of $ 5-HT_{1A}$receptors, offering an effective therapeutic candidate in the management of anxiety and depression in humans.

• 대한본초학회지
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• 제35권3호
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• pp.1-8
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• 2020

Objectives : In this study, we examined the estrogenic activities and anti-osteo clastogenesis effects of PCE17, a mixture of PE (an extract of Puerariae Flos), and CE (an extract of Citri Unshius Pericarpium). Methods : The estrogenic effect of PCE17, PE and CE were examined by ER-β/ERE reporter gene assay and proliferation assay in 293 T and MCF-7 cells. The expression of estrogen-responsive gene and protein were checked by Real Time-PCR (RT-PCR) and Western blotting in MCF-7 cells. Inhibitory effect of PCE17, PE and CE on RANKL-induced osteoclast differentiation were evaluated by TRAP staining and RT-PCR in primary osteoclast precursors from rat bone marrow cells. Results : PCE17 and PE bind to ERs (estrogen receptors) and show estrogenic activities in 293T cells. They also stimulated the proliferation of MCF-7 cells and increased the expression of ER response gene, pS2. Tectorigenin, an active ingredient of PE, shows similar estrogenic activities in MCF-7 cells. PCE17 and CE inhibited RANKL-induced osteoclastogenesis in rat primary osteoclast precursor cells and down-regulated the osteoclast-specific genes of Nfatc1, Ctsk, and Acp5. Conclusions : In conclusion, PCE17 may have therapeutic potential in cases of menopause and osteoporosis.

• 대한본초학회지
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• 제24권4호
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• pp.101-106
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• 2009

Objectives : We investigated the anti-aging effects on skin with 9 Repetitive steaming and fermenting herbal composition extract (FHE). Methods : Herbal composition is comprised of Panax Ginseng, Rehmannia glutinosa, Polygonum multiflorum and Polygonatum Sibiricum. They steamed and fermented with Saccharomyces cerevisiae and Lactobacillus brevis by turns at 9 times. We measured various effects related to skin aging such as scavenging activity against free radical, cell proliferation, collagen synthesis and toxicity of 9 repetitive steaming and fermenting herbal composition extract were evaluated and compared with herbal composition extract (HE). Results : As the number of steaming and fermenting cycle increased free-radical scavenging activity were increased. But cell proliferating ratio was not increased when the number of steaming and fermenting cycle. The FHE could significantly increase the collagen synthetic ratio compared with HE treated group. And, FHE was showed no toxicity at all tested concentrations. Conclusions : The results of our study propose that FHE has good anti-aging effects on skin.

• 대한화장품학회지
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• 제46권1호
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• pp.81-88
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• 2020

Diesel particulate matter (DPM)은 피부각질세포에서 염증을 일으킨다. 또 aryl hydrocarbon receptor (AhR)을 통한 xenobiotic response element (XRE) promoter activity에 영향을 주어 cytochromeP (CYP) family의 발현을 촉진시킨다. 이 연구에서는 LG-HMC의 미세먼지 유발 피부 염증완화 및 XRE 발현 조절기능에 대하여 연구를 진행하였다. 먼저, HaCaT에서 DPM이 XRE promoter를 과활성화 시켜주는 것을 확인하였고, 이를 LG-HMC가 완화 시켜주는 것을 확인하였으며 이들 원료 중, 상백피추출물, 황금추출물이 XRE promoter의 과활성화 억제에 관여하는 것을 확인하였다. 이어, HaCaT에서 DPM에 의해 발현이 증가하는 염증성 사이토카인에 대해 LG-HMC 및 상백피추출물, 황금추출물이 염증성 사이토카인의 발현을 줄여주는 것을 확인하였다. 추가적으로 상백피추출물과 황금추출물이 DPPH 라디컬을 효과적으로 줄여줌으로써 미세먼지에 의한 라디컬 손상도 효과적으로 방어할 수 있는 소재임을 확인하였다. 결과적으로 LG-HMC가 미세먼지에 의한 피부염증완화와 피부방어효과를 갖는 것을 확인하였고, LG-HMC를 구성하는 상백피추출물과 황금추출물이 미세먼지에 의한 손상방어에 중요한 역할을 하는 것을 확인하였다.

• 건축사
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• 통권646호
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• pp.36-41
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• 2023

• 인포메이션 디스플레이
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• 제24권1호
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• pp.11-27
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• 2023