• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 B
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• pp.1270-1272
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• 2003

Smart card system is being used in many countries to improve access to their transportation systems. Especially for subway system that typically see high volumes of passengers at specific times of the days, it's critical to find a ray to collect fares without unnecessarily delaying passengers. The card consists of antenna, modulation and demodulation block, power supply module and memory. The antenna receives the power and data signal from reader. The FRAM is used as the inner memory. And it is a non-volatile memory and complements the problems, that is high consumption and low data processing speed, of using conventional EEPROM in the passive smart cart. In this paper, we analyze and design the RF passive smart card to apply to the fare collection for the subway gate system.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 D
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• pp.2705-2707
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• 2003

Over the past several years, the application extent of the real-time systems is being expanded with the progress of civilization. An effort to minimize power consumption at the system is being accomplished in several fields from the design of an analog/digital circuit up to the device level. Things of this effort have included the power optimum-technique to minimize power consumption at the digital logic circuit and the dynamic managed skill by means of the decision of the operating system. In this paper, we designed of low power system by using power-optimized method. As an effective low-power design, we designed the low power system which it has a monitoring system within the main board and a personal computer.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.1243-1244
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• 2007

전자주개물질 (elelctron donating material)인 poly(3-hexylthiophene) (P3HT)와 전자받개물질 (electron accepting material)인 티타니아 ($TiO_2$)를 이용한 복합형 태양전지에 대해 연구하였다. 유기물 태양전지에 응용되는 전도성 고분자의 여기자 (exiton)의 확산거리가 매우 짧기 때문에 그것을 보완하기 위해 전자주개물질과 받개물질의 표면적을 넓힐 필요가 있다. 비교적 패턴을 형성하기 쉬운 무기물인 티타니아를 이용해 표면적을 증가시켰으며 그렇지 않은 태양전지에 비해 효율이 두 배 증가하는 것을 볼 수 있었다. 티타니아의 표면적을 증가시킨 태양전지의 개방회로전압 ($V_{oc}$), 단락회로전류 ($I_{sc}$), FF (fill factor) 및 효율 (${\eta}$)은 각각 560 mV, 0.657 mA, 48.3 %, 0.18% 이다.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2006년도 하계학술발표대회 논문집
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• pp.909-914
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• 2006

The purpose of this study is to analyze the thermal of DFS(double Facade System) and curtain wall in the heating period. The physical difference between curtain wall and double facade on thermal performance has been tested at the newly constructed laboratory, which can turn $360^{\circ}$ to confirm the characteristic of a facade with the various directions. This study divide on 'ventilated, airtight' and 'heated or unheated' conditions from the CASE 1, 2, 3, 4. The results showed thermal performance of double facade system which has been better than curtain wall. The heating energy of DFS reduced $8%{\sim}10%$ of energy consumption. comparable to SFS in experemted results. In view of the researching results so far achieved, the research came to a conclusion, that the curtain wall can save the energy in the heating period than a curtain wall.

• 한국태양에너지학회 논문집
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• 제39권5호
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• pp.29-40
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• 2019

In response to the rapid climate change, in order to save energy in the field of buildings, the country is planning not only zero energy buildings but also zero energy cities. In the Urban Development Project, the Energy Use Plan Report is prepared and submitted by predicting the amount of energy demand at the planning stage. However, due to the activation of zero-energy buildings and the increase in the supply of new and renewable energy facilities, the energy consumption behavior of buildings in the city is changing from the previous ones. In this study, to estimate urban energy demand of Zero Energy City, building energy demand forecasts based on "Passive plans for use of energy based primary energy consumption", "Actual building energy usage data from Korea Appraisal Board" and "data from Certification of Building Energy Efficiency Rating" as well as demand forecast according to existing "Consultation about Energy Use Plan Code" were calculated and then applied to Multifunctional Administrative City 5-1 zone to compare urban total energy demand forecasts.

• Clinical and Experimental Reproductive Medicine
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• 제19권2호
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• pp.181-187
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• 1992

Calcitonin exerts a positive effects on bone pain. The relief of bone pain has been well known in Paget's disease and malignancy patients with bone metastasis who were treated with salmon calcitonin. We carried out a clinical study evaluating efficacy of salmon calcitonin in reducing bone pain and improving mobility of the postmenopausal osteoporosis women. Fifty women suffering pain from postmenopausal osteoporosis diagnosed by evidence of radiology and/or dual photon absorptiometry were treated with salmon calcitonin 50 MRC three times per week for 4 weeks. The severity of pain estimated by visual analogue scale(VAS) was reduced significantly in treated patients from $8.6{\pm}0.7$ on day 0 to $2.7{\pm}1.7$ on day 28. The mobility of the patients was improved in 2 weeks after salmon calcitonin treatment. Mild adverse effects were seen in 8(16%) patients; headache in 4(8%), sweating and dizziness in 2(4%), pain at the injection site in 1(2%), nausea and vomiting in 1(2%) patient. The treatment was stopped in 3 patients by their request. Salmon calcitonin was effective in 39(83%) of 47 patients above moderate degree. In conclusion, salmon calcitonin is useful in the treatment of patients with pain from postmenopausal osteoporosis.

• 한국지구과학회지
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• 제32권2호
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• pp.239-247
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• 2011

국제기후변화협약 및 정부의 저탄소 정책은 기본적으로 과학이 제시한 이산화탄소 증가에 대한 기후민감도에 근거해야 한다. 그러나 기후민감도의 추정치는 현재까지 연구 단위별로 차이가 커서, 이에 대한 과학적 배경, 한계, 전망을 고찰할 필요가 있다. 본 연구에서는 지금까지의 기후민감도에 대한 국내외 연구 결과를 객관적으로 종합하여 검토한다. 기후민감도를 결정하는 것은 대기와 지면의 각종 물리과정에 의한 기후피드백 작용이며, 이 중 특히 태양 단파복사량을 조절하는 구름, 해빙과 관련된 물리과정은 불확실성이 가장 커서, 부정확한 민감도 추정을 야기하는 것으로 보인다. 이 때문에, 최근 인공위성 자료를 이용하여 추정한 기후민감도는 기후모델들이 갖는 범위(대기 중 이산화탄소 2배 증가당 지구평균기온 2-5 K 증가)에 들거나, 그보다 훨씬 작은 값을 갖는다.

• 대한족부족관절학회지
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• 제8권1호
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• pp.92-96
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• 2004

Purpose: To analyze the clinical and radiological results of the operative treatment in the avulsion fracture on the base of the fifth metatarsal. Materials and Methods: We studied retrospectively, 11 patients of avulsion fracture on the base of the fifth metatarsal operated and followed over 1 year, from February 2000 to May 2002. There were eight men and three women and the average age was 39 years old. The mean follow up period was 14 months. Ten cases were slip-down and one case was fall from a height injuries. We used the modified Foot Score by Wiener for the clinical evaluation, and analyzed the time of union and state of reduction radiologically. Results: In clinical results, we had ten excellent and one good cases by the modified Foot Score at last follow-up. In radiologic results, the complete bony union was achieved in all cases and the duration of the bony union was 37 days in average. Conclusion: We had good result for the avulsion fractures on the base of the fifth metatarsal treated by the operation. This study shows the operation was recommended for the moderate and severe displacement of the avulsion fractures on the base of the fifth metatarsal.

• 항공우주산업기술동향
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• 제8권2호
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• pp.31-38
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• 2010

환경 및 기후변화는 사회 전 분야에 걸쳐 폭넓게 영향을 미치고 있으며, 최근 들어 원격탐사기술의 발전으로 인공위성을 이용한 환경감시가 본격화되고 있다. 또한 환경의 일간 변화 관측 및 오염원의 발생, 이동 등에 대한 감시의 필요성에 따라 시간 해상도의 증가가 요구되고 있다. 이로 인하여 정지궤도에서 환경감시에 대한 수요가 증가하고 있으며, 미국과 유럽과 같은 우주개발 선진국에서는 이에 대한 임무분석 및 개념 연구가 수행되고 있는 추세이다. 본 논문에서는 정지궤도 환경감시 탑재센서의 개발동향을 살펴본다. 미국에서 연구되어지고 있는 GEO-CAPE 미션과 GIFTS 탑재체 및 유럽에서 연구되고 있는 Sentinel-4에 대하여 임무설계 및 분석, 개발 현황 등을 소개하였다. 향후 국내 환경탑재체의 개발도 이러한 개발동향을 고려하여 임무 및 활용성 분석과 함께 추진될 것이다.

• 한국약용작물학회지
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• 제26권1호
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• pp.26-31
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• 2018

Background: Angelica gigas, A. sinensis, and A. acutiloba are commercially important in the herbal medicine market, and among them, A. gigas has the highest economic value and price. However, their similar morphological traits are often used for fraud. Despite their importance in herbal medicine, recognition of the differences between Angelica species is currently inadequate. Methods and Results: A multiplex polymerase chain reaction (PCR) method was developed for direct detection and identification of A. gigas, A. sinensis, and A. acutiloba. The gene for the distinction of species was targeted at ITS in the nucleus and trnC-petN gene in chloroplasts. The optimized multiplex PCR in the present study utilized each Angelica species-specific primer pairs. Each primer pair yielded products of 229 base pairs (bp) for A. gigas, 53 bp for A. sinensis, 170 bp for A. acutiloba. Additionally non-specific PCR products were not detected in similar species by species-specific primers. Conclusions: In the present study, a multiplex-PCR assay, successfully assessed the authenticity of Angelica species (A. gigas, A. sinensis, and A. acutiloba). and whole genome amplification (WGA) was performed after DNA extraction to identify, the species in the product. The detection method of raw materials developed in the present study could be applied to herbal medicine and health functional food management.