• Journal of agricultural medicine and community health
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• v.39 no.1
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• pp.37-45
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• 2014

Objective: This study was conducted in order to evaluate an education program for cardio-cerebrovascular high-risk patients. Methods: To evaluate patients' quality of life, EQ-5D was used and an organized survey was conducted via calls and interviews for hypertension, diabetes patients who had visited the KHyDDI(Korea Hypertension Diabetes DaeguInitiative) education center or 70 clinics through out the nation. Results: The subjects included 537 patients, 320 of who were in the clinic education and 217 of who were in the education center program. Sixty eight of the subjects went through the EQ-5D evaluation before and after the education program. In the EQ-5D index distribution of their quality of life before the education program, there was a statistically significant difference in gender(p<0.001) with higher points among males. Regarding age, there was a statistically significant difference between those aged over 65 years and under 65(p<0.001), with higher points in the group under the age of 65. Further, the EQ-5D 5 scope index was statistically significant different before and after receiving the education(p<0.05). Conclusion: Therefore, the KHyDDI staged education program is effective for improving the quality of life. Moreover, it could contribute to the complications of the disease through a variety of approaches by considering both gender and age.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.44 no.6 s.360
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• pp.83-88
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• 2007

In this paper, we propose the function verification method of the OLED(Organic Light Emitting Diode) drive IC using PLI verification method. This method uses the HDL(Hardware Description Language) simulator, PLI(Programing Language Interface), and GUI (Graphic User Interface) image viewer. This method improves the execute efficiency 40 times than conventional function verification methods. The proposed method can be used efficiently for function verification of DDI(display driver IC) design step.

• JSTS:Journal of Semiconductor Technology and Science
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• v.14 no.5
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• pp.688-696
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• 2014

A slew-rate control method of LCD driver ICs is introduced to increase uniformity between adjacent driver ICs and reduce power consumption. The slew rate of every voltage follower is calibrated by a feedback algorithm during the non-displaying period. Under normal operation mode, the slew rate is dynamically controlled for improving power efficiency. Experimental results show that the power consumption is reduced by 16% with a white pattern and by 10% with a black pattern, and display defects are successfully eliminated.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 1997.04a
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• pp.215-220
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• 1997

본 연구는 추진제 연소관 내부에 도포 되는 내열재 라이닝 공정을 최적화하기 위해 라이너 Premix 반응성을 실험하고 그결과를 토대로 Premix 저장조건을 설정하였다. HX-계열의 Bonding agent를 사용하는 LH-2, LH-5, LH-6 라이너를 선택하여 각각 20, 30, $40^{\circ}C$하에서 5주간 저장후 경화제와 경화촉매를 주입하고 초기점도를 측정하여 반응성을 예측하였다. 그 결과 Bonding agent로 HX-868을 사용하는 LH-5, LH-6 라이너가 HX-752를 사용하는 LH-2보다 반응성이 빠르며, 경화제와 경화촉매로 DDI와 T-12를 사용하는 LH-5 라이너가 IPDI와 $Fe(AA)_3$를 사용하는 LH-6 라이너 보다 반응성이 빠르게 나타났다. 이러한 저장온도와 기간에 따른 반응성을 토대로 공정 적용시 급격한 점도 상승에 의한 작업의 불안정성을 피하기 위해 일정 점도를 초과하지 않는 라이너 Premix 저장조건을 설정하였고, 향후에는 Bonding agent로. HX-868을 사용하는 LH-5, LH-6 라이너는 보다 공정성이 양호한 HX-752로 바꾸어 주는 것이 바람직 할 것이다.

• Proceedings of the Korea Water Resources Association Conference
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• 2005.05b
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• pp.873-878
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• 2005

본 연구에서는 과거 우리나라의 농업가뭄 피해와 기상상황 등을 조사하고, 기왕의 가뭄지수들을 검토하여 우리나라 실정에 맞는 농업가뭄지표를 개발하고, 농업가뭄의 평가를 위한 가뭄심도 분류 기준을 설정하였다. 기존의 농업가뭄의 평가를 위해서 주요 가뭄년에 대한 한해극복지를 수집하였고, 주요 일간지를 대상으로 가뭄기록을 조사하였다. 이를 바탕으로 시기별 농업가뭄의 발생에 대한 정량적 분석을 위한 분석기준을 선정하여 각 연도별 발생상황을 정량화하였다. 국내외에서 가뭄을 평가하기 위해 많이 쓰이는 PDSI, SPI, Percent of Normal, Decile, Percent of Median을 이용하여 가뭄지수를 산정하였고, 가뭄지수 산정결과와 기록된 가뭄 발생결과와 비교하여 각 지수별 정확도를 평가한 결과, 우리나라의 농업가뭄 발생에 대해서는 가뭄의 발생시기와 가뭄지속에 대해서는 3개월 지체된 SPI가 잘 맞는 것으로 나타났다. 또한 농업가뭄지표의 실용화를 통한 가뭄대책업무를 위해 평시대비, 가뭄우려, 가뭄확산으로 구분된 가뭄단계를 세분하여 평년강우지수(MRI), 표준강우지수(SPI), 무강우지수(DDI), 저수율 및 토양수분상태를 고려하도록 가뭄단계를 6단계로 세분하여 설정하였다.

• JSTS:Journal of Semiconductor Technology and Science
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• v.16 no.4
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• pp.481-487
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• 2016

A new two-line based inversion driving method is introduced for low power display-driver ICs. By inserting a timing offset between the chopper stabilization and the alternation of LCD polarity, we can reduce power consumption without noticeable degradation in the display quality. By applying the proposed scheme to 12" LCD applications, we achieved 7.5% and 27% power saving in the display-driver IC with white and black patterns, respectively.

• Korean Journal of Ichthyology
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• v.25 no.1
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• pp.38-41
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• 2013

A deep-dwelling goby, Obliquogobius yamadai, was described as the first record from Korea based on three specimens (30.3~47.0 mm SL) collected from the southern sea off Jeju Island. The species is characterized by having I, 9 second dorsal fin rays, scaled lateral side of nape, smaller head with large eye, and asymmetrical caudal fin dorsoventrally as well as about nine yellowish bars on body side. A new Korean name, "Gip-eun-ba-da-no-ran-ddi-mang-dug", is proposed for the species.

• Journal of Pharmaceutical Investigation
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• v.28 no.1
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• pp.1-5
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• 1998

The effect of synthetic polymer membranes on the permeation rate of dideoxynucleoside-type anti-HIV drugs through hairless rat skin was studied using ethylene/vinyl acetate copolymer (EVA) and ethylene/methyl acrylate copolymer (EMA) membranes fabricated by solvent casting method. In vitro skin permeation kinetics study of DDC (2',3'-dideoxythymidine), DDI (2',3'-dideoxyinosine) and AZT (3'-azido-3'-deoxythymidine) across the (membrane/skin) composite was conducted for 24 hours at $37^{\circ}C$ using the Valia-Chien skin permeation system. The results showed that skin permeation rate of each drug across the (skin/membrane) composite was mainly dependent on the property of the membrane. Proper selection of the polymeric membrane which resembles hydrophilicity/lipophilicity of the delivering drug was important in controlling the skin permeation rate.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.11 no.10
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• pp.1899-1909
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• 2007

A cross-coupled charge pump with internal pumping capacitor, witch is advantages from a point of minimizing TFT-LCD driver IC module, is newly proposed in this paper. By using a NMOS and a PMOS diode connected to boosting node from VIN node, the pumping node is precharged to the same value each pumping node at start pumping operation. Since the lust-stage charge pump is designed differently from the other stage pumps, a back current of pumped charge from charge pumping node to input stage is prevented. As a pumping clock driver is located the font side of pumping capacitor, the driving capacity is improved by reducing a voltage drop of the pumping clock line from parasitic resistor. Finally, a layout area is decreased more compared with conventional cross-coupled charge pump by using a stack-MIM capacitors. A proposed charge pump for TFT-LCD driver IC is designed with $0.13{\mu}m$ triple-well DDI process, fabricated, and tested.

• Transactions on Electrical and Electronic Materials
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• v.13 no.2
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• pp.106-109
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• 2012

A low power methane gas sensor with microheater was fabricated by silicon bulk micromachining technology. In order to heat up the sensing layer to operating temperature, a platinum (Pt) micro heater was embedded in the gas sensor. The line width and gap of the microheater was 20 ${\mu}m$ and 4.5 ${\mu}m$, respectively. Zinc oxide (ZnO) nanowhisker arrays were grown on a sensor from a ZnO seed layer using a hydrothermal method. A 200 ml aqueous solution of 0.1 mol zinc nitrate hexahydrate, 0.1 mol hexamethylenetetramine, and 0.02 mol polyethylenimine was used for growing ZnO nanowhiskers. Temperature distribution of the sensor was analyzed by infrared thermal camera. The optimum temperature for highest sensitivity was found to be $250^{\circ}C$ although relatively high (64%) sensitivity was obtained even at as low a temperature as $150^{\circ}C$. The power consumption was 72 mW at $250^{\circ}C$, and only 25 mW at $150^{\circ}C$.