• Proceedings of the KIEE Conference
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• 1987.07b
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• pp.933-935
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• 1987

We have developed 140Mb/s and 565Mb/s muldexes as parts of a 565Mb/s Optical Fiber Transmission System. Bunched frame structures are used for these muldexes. In this paper we describe their frame synchronization performance.

• Corrosion Science and Technology
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• v.5 no.5
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• pp.160-167
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• 2006

S-Acetyl Isothiourea Acetate (S-AITA) was synthesized in the laboratory and this influence on the inhibition of corrosion of mild steel in 1.11 N hydrochloric and 1.12 N sulphuric acids was investigated by weight loss and potentiostatic polarization techniques at 303K, 353K and 403K. These results were confirmed by the impedance technique. The inhibition efficiency increased with increase in concentration of inhibitor and decreased with rise in temperature from 303K to 403K. The maximum inhibition efficiency of S-AITA was found to be 99.95% (0.5% of S-AITA) at 303K in sulphuric acid. The adsorption of this compound on the mild steel surface from the acids has been found to obey Temkin's adsorption isotherm. The potentiostatic polarization results revealed that S-AITA was a mixed type inhibitor. Some thermodynamic parameters i.e., activation energy (Ea), free energy of adsorption (${\Delta}G_{ads}$), enthalpy of adsorption (${\Delta}H$) and entropy of adsorption (${\Delta}S$) were also calculated from weight loss data.

• Korean Journal of Optics and Photonics
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• v.16 no.2
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• pp.143-145
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• 2005

We demonstrated 5.12-Tb/s($l28 ch \times 43 Gb/s$) WDM transmission over 200 km of medium dispersion fiber. The spectral efficiency was 0.8-(bits/s)/Hz. After transmission, the average Q-factor was measured to be 15.2 dB.

• 한국IT서비스학회:학술대회논문집
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• 2008.05a
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• pp.248-253
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• 2008

현재 IT서비스업체에서 주요사업으로 수행중인 S/W의 개발분야에서 S/W공학은 마치 현실과 동떨어진 이론, 지식으로만 인식되고 실제 S/W공학의 효과를 인식하고 활용하는 사례가 극히 드문 것이 현실이다. LG CNS에서는 이러한 현실에서 실용적인 S/W공학을 재정의하고 이를 현장에 적용시키기 위하여 사업수행을 통해 얻은 S/W공학 측면의 사례를 발굴하여 이를 전사적으로 확산시키는 활동을 진행하고 있다. 본 논문에서는 IT서비스의 전사적 측면에서 실용적인 S/W공학의 효과성을 재인식시키기 위한 방법론 측면의 접근사례를 소개한다.

• Proceedings of the KIEE Conference
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• 2008.07a
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• pp.2087-2088
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• 2008

우리나라는 지속적인 경제성장에 따라 전력에너지의 수요도 끊임없이 증가하였고, 이후 꾸준한 전력계통의 설비 및 용량의 증가로 인해 현재에는 선진국 수준의 송전망을 구축하고 있으며, 765kV급 초고압 송전선로를 자체기술로 건설하여 운영하고 있는 상황이다. 또한 새로운 기술과 장비들이 빠르게 개발되고 있는 현실에서 세계시장에서 경쟁력을 갖추기 위하여 이에 알맞은 새로운 교육프로그램의 개발 및 육성방안이 요구되고 있음에 따라 이에 본 연구에서는 송전선로 유지보수 인력양성을 위한 교육프로그램 발전방향에 대해 제시하고자 한다.

• Journal of Microbiology and Biotechnology
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• v.27 no.6
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• pp.1180-1188
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• 2017

Neuronatin (NNAT) is known to regulate ion channels during brain development and plays a role in maintaining the structure of the nervous system. A previous in silico analysis showed that Nnat was overexpressed in the adipose tissue of an obese rodent model relative to the wild type. Therefore, the aim of the present study was to investigate the function of Nnat in the adipose tissue. Because obesity is known to systemically induce low-grade inflammation, the Nnat expression level was examined in the adipose tissue obtained from C57BL/6 mice administered lipopolysaccharide (LPS). Unexpectedly, the Nnat expression level decreased in the white adipose tissue after LPS administration. To determine the role of NNAT in inflammation, 3T3-L1 cells overexpressing Nnat were treated with LPS. The level of the p65 subunit of nuclear factor-kappa B ($NF-{\kappa}B$) and the activity of $NF-{\kappa}B$ luciferase decreased following LPS treatment. These results indicate that NNAT plays an anti-inflammatory role in the adipose tissue.

• 대한생식의학회:학술대회논문집
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• 2005.11a
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• pp.132-133
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• 2005

• 대한생식의학회:학술대회논문집
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• 2006.06a
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• pp.170.1-170.1
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• 2006

• Proceedings of the KIPE Conference
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• 2015.07a
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• pp.89-90
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• 2015

포항가속기 연구소에서 4세대 전자를 가속시키기 위하여 RF 공급원으로 사용하는 펄스 모듈레이터의 펄스전압 안정도는 50ppm 이하의 고전압이 요구된다. 200 MW 모듈레이터에 공급하기 위하여 개발된 고전압 CCPS사양은 50 kV, 120 kJ/sec, 2400mA, 20ppm이하이다. XFEL용 모듈레이터는 고정밀 고전압 CCPS를 적용하여 운전하였으며 모듈레이터 사양은 400kV, 500A, 8us, 60Hz, beam voltage stability 0.005(%)이다. 본 논문에서는 개발한 고정밀 고전압 CCPS를 사용하여 시험한 모듈레이터의 시험 결과에 대하여 발표하고자 한다.

• Fibers and Polymers
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• v.6 no.3
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• pp.224-228
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• 2005

This paper focuses on the application of a novel mathematical limit approach derived for K/S values in reactive dyeing of cotton fabrics. The relation obtained from Kubelka-Munk equation is used because the Kubelka-Munk equation is the basic relationship among fabric reflectance, fabric dye content and dyestuff characteristics. The limit approach derived in a former paper is applied to the laboratory dyeings and the dyeing behavior of some reactive dyes on cotton knitted fabric has been obtained. The results of the laboratory experiments are discussed using the new mathematical approach. When the actual K/S values obtained from the dyeings and the calculated K/S values derived by the limit approach are considered independently, it is observed that the limit relation is val id for low dye concentration applications. When the K/S values are calculated taking the K/S value of the initial dyeing concentration $(0.1\;\%\;owf)$ as the starting concentration by applying the result of the derived limit approach, the calculated K/S values fit with the ones obtained in actual dyeings. It is concluded that the novel approach presented in the paper can be used in calculating the K/S values when the initial dyeings at low dye concentrations are carefully carried out.