• The Bulletin of The Korean Astronomical Society
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• v.41 no.1
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• pp.32.1-32.1
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• 2016

1996년, 보현산천문대는 1.8m 반사망원경과 1K CCD 카메라, 그리고 태양망원경을 갖추고 한국 천문학의 본격적인 광학관측시대를 열었다. 준공 직후인 1997년에는 측광관측기기를 2K CCD로 교체 하였으며, 1998년에는 망원경 제어시스템(TCS)을 국내 연구진이 자체 개발하였고 망원경의 전자부도 교체하였다. 1999년의 중분산분광기 제작 이후 2003년에는 고분산에셀분광기 BOES를 개발하여 세계적인 경쟁력을 갖춘 분광관측이 가능하게 되었다. BOES는 현재 보현산천문대의 주 관측기기로 활용 중이다. 2008년에는 적외선이미징카메라 KASINICS를 개발하여 관측 파장대를 적외선까지 넓혔으며, 2010년에는 가시광 측광관측기기를 4K CCD로 업그레이드 하였다. 2015년에는 망원경 구동시스템을 다시 한 번 개선하여 보다 안정적이고 정밀한 관측시스템을 갖추게 되었다. 또한, 2014년과 2015년에는 2년에 걸쳐 관측실과 숙소, 그리고 각종 연구시설의 전면 리모델링을 실시하여 관측자를 위한 환경도 개선하였다. 이러한 다양한 관측지원을 바탕으로 보현산천문대 연구장비를 활용한 논문은 매년 꾸준히 생산되고 있으며 관측과 연구결과들은 한국 광학천문학의 밑거름이 되고 있다. 2016년에는 1m 망원경 설치를 완료할 예정이며 장기관측 과제에 집중함으로써 연구의 새로운 지평을 열게 될 것이다. 연구장비의 안정적인 구동과 성능 향상을 위해 중장기발전계획 아래 노후화된 기기의 교체와 개발을 진행 중이다. 2016년 4월, 제2의 도약기를 준비 중인 보현산천문대의 준공 20주년을 맞이하여, 그 동안의 발자취를 돌아보고 앞으로 나아갈 길을 제시하고자 한다.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.65 no.3
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• pp.388-396
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• 2016

Through the correspondence works with international electrotechnical vocabulary(IEV) in the smart grid field and power information technology field, we analyzed cases for discussion of terms and definitions in the IEV and then proposed an advanced procedure and computing system for standardization of International Electronical Committee(IEC) terminologies. The standardization procedure consists of processes for existing terminology, new terminology and correspondent terminology which have different structures. An example of the standardization work of correspondent terminology is given. The standardization computing system are based on the process for terminology extraction, terminology verification and terminology management which could provide the Wikipedia type terminology search function. In order to prevent that there exist multiple terminologies in IEV, the database search system is needed to be developed. We proposed the 'IEV_Term_Search' program which is the database search system. Terminology standardization of different technical committees(TC) and completion of the IEV to promote cooperation between TC 1 and the TCs must be followed by revision and standardization using the standardization computing system.

• Proceedings of the Korea Society for Simulation Conference
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• 2001.05a
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• pp.107-112
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• 2001

본 연구는 FTMS와 TCS를 실시간으로 통신하여 톨게이트 운영에 관련된 다양한 교통정보를 제공하는 교통상황 모니터링과 미래의 교통상황을 예측하고 이를 바탕으로 톨게이트 교통상황을 예측하는 톨게이트 시뮬레이션 시스템(TGSS)을 개발하는 것이다. 교통상황 모니터링은 실시간 교통자료를 통계처리하고 분석하여 사용자에게 그래픽하게 교통정보를 제공하고 교통류의 예측은 톨게이트에 도착하는 교통류를 60분 후까지 예측하여 톨게이트 운영자에게 제공한다. 또한 톨게이트 예측시스템은 서울톨게이트에 도착하는 교통류 패턴을 이용하여 미래 톨게이트 교통상황을 시뮬레이션하고 이에 대한 톨게이트 운영 대안을 제시하는 기능을 수행한다. FTMS 및 TCS와 실시간으로 통신하기 위하여 별도의 통신프로그램을 작성하였고 통신에 의해 수집된 실시간 교통자료들은 모니터링 시스템과 연계하여 서울 톨게이트 주변구간의 교통상황과 톨게이트 운영 현황을 제공한다. 교통류 예측 시스템에 사용되는 모형은 거시적 교통류 모형인 Simple Continuum 모형과 시계열 모형을 이용하였고 이를 통해 서울 톨게이트에 도착하는 미래 교통류를 예측 할 수 있다. 톨게이트의 교통상황을 구현하기 위하여 미시적 모형인 차량추종모형과 차로변경모형을 톨게이트 예측 시스템에 반영하였고 현재의 톨부스 운영안과 사용자가 입력하는 톨부스 운영대안에 따라 시뮬레이션 함으로써 미래 톨 플라자내 교통상황을 톨게이트 운영자에게 애니메이션으로 보여줄 수 있다. 톨게이트 시뮬레이션 시스템을 이용하여 현재의 톨게이트 운영안과 최적화된 운영안을 상호 비교함으로써 톨게이트 운영자는 좀더 과학적인 톨게이트 운영을 모색할 수 있을 것으로 생각된다. 실용적 측면에서 볼 때, 톨게이트 시뮬레이션 시스템(TGSS)은 실시간 통신을 통한 모니터링과 교통류 예측으로 톨게이트 상황을 시뮬레이션하고 톨게이트 운영 대안을 제시·평가함으로써 서울톨게이트 운영을 효율화하고 이로 인한 고속도로 소통 증대를 도모할 수 있을 것으로 기대된다.

• The KIPS Transactions:PartB
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• v.10B no.3
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• pp.237-242
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• 2003

Ant Colony System (ACS) Algorithm is new meta heuristic for hard combinatorial optimization problem. It is a population based approach that uses exploitation of positive feedback as well as greedy search. It was first proposed for tackling the well known Traveling Salesman Problem (TSP). In this paper, we introduce ACS of new method that adds reinforcement value for each edge that visit to Local/Global updating rule. and the performance results under various conditions are conducted, and the comparision between the original ACS and the proposed method is shown. It turns out that our proposed method can compete with tile original ACS in terms of solution quality and computation speed to these problem.

• International Journal of Automotive Technology
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• v.8 no.2
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• pp.249-258
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• 2007

This paper proposes a method that can be used for the resistance estimation of a PWM (Pulse Width Modulation)-driven solenoid. By using estimated solenoid resistance, the PWM duty ratio was compensated to be proportional to the solenoid current. The proposed method was developed for use with EHB (Electro-Hydraulic Braking) systems, which are essential features of the regenerative braking system of many electric vehicles. Because the HU (Hydraulic Unit) of most EHB systems performs not only ABS/TCS/ESP (Electronic Stability Program) functions but also service braking function, the possible duration of continuous solenoid driving is so long that the generated heat can drastically change the level of solenoid resistance. The current model of the PWM-driven solenoid is further developed in this paper; from this a new resistance equation is derived. This resistance equation is solved by using an iterative method known as the FPT (fixed point theorem). Furthermore, by taking the average of the resistance estimates, it was possible to successfully eliminate the effect of measurement noise factors. Simulation results showed that the proposed method contained a sufficient pass-band in the frequency response. Experimental results also showed that adaptive solenoid driving which incorporates resistance estimations is able to maintain a linear relationship between the PWM duty ratio and the solenoid current in spite of a wide variety of ambient temperatures and continuous driving.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.28 no.1
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• pp.114-122
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• 2014

This paper describes a study of the design conditions of a planar surface dielectric barrier discharge (DBD) reactors for generating negative air ions. The capacity of negative air ion generated by the surface DBD reactor is affected by the shape, area ratio and the location of the discharge and induction electrodes of it. To study the optimal design conditions of DBD reactors, the electrodes printed on the substrate of a PCB board is utilized to conduct kind of experiments: the distance of the each electrode along with the X-Y axis, the area ratio of the discharge electrode to induction electrode, and the symmetrical and asymmetrical location of two electrodes. The ion generation capacity is inverse proportional to the gap increases along with X-Y axis. And the optimum ion concentration generated by the ionizer was inspected when the electrodes area ratio was 3 and 5 times of the symmetrical and asymmetrical experimental condition respectively.

• Proceedings of the Korea Water Resources Association Conference
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• 2012.05a
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• pp.38-38
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• 2012

The East Asia (EA) region including China, Taiwan, Japan, and Korea are especially vulnerable to hydrometerological extremes during the boreal summer (June-September). This study, therefore, pursued an exploratory analysis to improve better understanding of the potential impacts of the two types of PJ patterns on WNP Tropical cyclone (TC) activities and TC-induced extreme moisture fluxes over Korea's five major river basins. This study shows that during positive PJ years, the large-scale atmospheric environments are more favorable for the TC activities than those in negative PJ years. During positive PJ year, it is found that there are weaker wind shear, stronger rising motion, as well as large relative humidity over the Korean peninsula (KP) compared to negative PJ years. As a result, TCs making landfall are more exhibited over the southeastern portions of South Korea. Despite the relatively modest sample size, we expect that insights and results presented here will be useful for developing a critical support system for the effective reduction and mitigation of TC-caused disasters, as well as for water supply management in coupled human and natural systems.

• Korean Journal of Veterinary Service
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• v.25 no.3
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• pp.285-294
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• 2002

The present studies were carried out to determine antibiotics residues in pork and beef muscles by EEC-4-plate and HPLC. A total of 2,534 samples of pork muscles and 1,070 samples of beef muscles from slaughter houses were collected in Gyeongnam area from January to December, 2001. The results were summarized as follows; 1. Recovery rates of TCs, Sulfa drug, Penicillin G from fortified pork and beef muscles ranged as 68.79～98.24%, 78.21～94.58% and penicillin G 63.35～67.24% respectively, by HPLC. 2. Antibiotics residues were detected in 36 sample(1.42%) of pork muscles, 29 sample (2.71%) of beef muscles by EEC-4-plate. 3. Detection rate of antibiotic residues 14 samples(0.55%) and 26 samples(2.43%), in pork and beef muscles, respectively by HPLC. Concentration of residues in 22 sample(2.06%) of beef muscle were higher than tolerance level in korea. 4. Antibiotics detected were sulfamethazine(47.37%), tetracycline(15.79%), oxytetracycline (15.79%), penicillin G(15.79%), sulfamerazine(5.26%) in pork muscle samples and oxyteracycline (37.21%), penicillin G(30.23%), sulfamethazine(20.93%), tetracycline(4.65%), sulfamerazine (2.33%), sulfadimethoxine(2.33%), sulfaquinoxine(2.33%) in beef muscle samples.

• Molecules and Cells
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• v.42 no.2
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• pp.166-174
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• 2019

Bacterial species in the genus Xanthomonas infect virtually all crop plants. Although many genes involved in Xanthomonas virulence have been identified through molecular and cellular studies, the elucidation of virulence-associated regulatory circuits is still far from complete. Functional gene networks have proven useful in generating hypotheses for genetic factors of biological processes in various species. Here, we present a genome-scale co-functional network of Xanthomonas oryze pv. oryzae (Xoo) genes, XooNet (www.inetbio.org/xoonet/), constructed by integrating heterogeneous types of genomics data derived from Xoo and other bacterial species. XooNet contains 106,000 functional links, which cover approximately 83% of the coding genome. XooNet is highly predictive for diverse biological processes in Xoo and can accurately reconstruct cellular pathways regulated by two-component signaling transduction systems (TCS). XooNet will be a useful in silico research platform for genetic dissection of virulence pathways in Xoo.

• Clean Technology
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• v.16 no.1
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• pp.64-70
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• 2010

In this study, we suggest the application of the divided-wall column (DWC) to the existing trichlorosilane(TCS) purification process in the commercial polysilicon manufacturing process. Using Aspen HYSYS V7.1, an extensive simulation study was carried out for the analysis of the energy consumptions and capital cost for the conventional sequential distillation configuration and the DWC for producing a given purity and yield of trichlorosilane. As a result, it is shown that the DWC saves the separation energy by 61% and the equipment cost by 58% compared with the conventional distillation process.