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Bench Scale 구조물을 이용한 TMD 기반 철도역사 진동저감 기법의 실험적 검증
문연수,김민수,이찬영,지용수,이규세,최상현 한국복합신소재구조학회 2017 복합신소재구조학회논문집 Vol.8 No.2
Recently, measures for reducing noise and vibration of a railroad station are actively being developed to enhance its property value and comfort level of passengers. In this paper, the applicability of the recently developed vibration mitigation method utilizing a platform TMD (Tuned Mass Damper) by installing a spring-damper system beneath the platform is experimentally verified using a bench scale structure. The two-story bench scale structure is built to simulate a real railroad station, and vibration reduction effect is verified by comparing acceleration before and after applying the platform TMD at the 2nd floor of the structure. The design parameters of the platform TMD system is determined based on vibration analysis result and the MTMD (Multiple TMD) theory recently developed to enhance the effectiveness of the platform TMD method. The vibration is excited to the bench-scale structure using a vibrator. The performance test result for a spring-damper system is also presented. The result of the experiment reveals that the platform TMD method can reduce the vibration of the bench-scale structure by greater than 5dB(V).
문숙영,이병하,임연수 한국탄소학회 2007 Carbon Letters Vol.8 No.1
Oxidized PAN (OXI-PAN) fibers were used for the precursors of activated carbon fiber in study. How drying temper-ature affected the properties of carbon fibers on activating process of carbon fibers was investigated. The specific sur-face areas of activated carbon fibers have been determined on a series of chemicaly activated carbons with KOH andNaOH. The experimental data showed variations in specific surface area, iodine and silver adsorptions by the activatedods. This was because the ionic radius of iodine was smaller than the interior micropore size of activated carbon fibers.Silver adsorbed well in NaOH activated carbon fibers rather than KOH activated carbon fibers in this study.
계통연계 태양광발전시스템과 회전계자형 동기발전기의 병렬운전 특성
류연수(Ryu Yeon-Soo),유왕진(Yoo Wang-Jin),이철규(Lee Checl-Gyu),문종범(Moon Jong-Beom) 한국태양에너지학회 2008 한국태양에너지학회 학술대회논문집 Vol.- No.-
Through simulations and field experiment on A.C. parallel operation of both Utility Interactive Photovoltaic System and Diesel Engine Revolving Field Type Synchronous Generator, following factors have been found. First, the inverter should be operated in three modes of frequency(mode.1: ±0.3 ㎐ mode.2: ±l ㎐ mode.3: ±2 ㎐ as default, considering properties of operating Synchronous Generator. Second, as a result of supplying 13.5 ㎾ of residual power, it has been found that Synchronous Generator takes the power input only as reactive power, because it was electrically stable with frequency of 60.14㎐ and high voltage of 222.3V even when power factor was -0.94. Besides, it was mechanically stable, too, because the quake, noise, and temperature of Synchronous Generator in this case were 7.5 ㎜/s, 97 ㏈ and 6 ℃ respectively, which were lower than normal load connection of 145.6 ㎾ 11.03 ㎜/s. Thus, load share of Revolving Field Type Synchronous Generator reduces according to the supply of Photovoltaic System to the load power. In this experiment, 200㎾ of Synchronous Generator and 40 ㎾ of Photovoltaic System were operated in parallel. The load share was 20% in maximum, and 11.1lit/hr of fuel was saved.
아모레퍼시픽 미술관의 사례로 본 기업박물관의 역할 제고
류병희,문연수 한국문화예술경영학회 2011 문화예술경영학연구 Vol.4 No.2
현대 사회에서 기업의 이윤 추구가 당연시 되는 것과 동시에, 획득한 이익을 사회에 환원해야 한다는 기업의 사회적 책임은 기업 생존을 위한 필수불가결한 요소이자 지속가능경영의 보이지 않는 경쟁력이 되고 있다. 반면에 기업의 문화예술 분야에 대한 지원은 문화예술의 발전에 기여한다는 점 이외에도, 궁극적으로는 기업의 경영환경을 개선시키고 바람직한 기업문화를 형성하게 한다는데 의의가 있다. 본 논문에서는 아모레퍼시픽 미술관의 사례를 통해 기업박물관이 박물관으로서의 본질적인 기능뿐 아니라 기업과 문화예술 분야의 매개자로서의 역할을 살펴보고자 한다. 아모레퍼시픽 미술관은 전통 문화, 현대미술 지원에 대한 기획과 실천을 통해 모기업의 사회공헌활동을 수행하고, 또한 문화예술적 가치를 마케팅적 가치, 기업적 가치로 환원하여 기업 경영에 활용하도록 지원하고 있다. 이러한 사례로 볼 때 기업박물관의 핵심적 역할은 기업과 문화예술 사이의 매개자로서 일방적인 스폰서쉽(sponsorship)이 아닌 기업과 문화예술이 상생 발전하는 파트너쉽(partnership)을 구축하는데 있다고 할 수 있다.
최연수,김윤슬,문이나,황경태,양동성,한나라,김동유 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2
The development of isomer-controllable core containing quinoid materials has been considered as a main issue since the presence of geometrical isomers limits the systematic investigation of their chemicophysical properties. In this work, the isomer-free and low-lying energy level quinoid molecule bQuPheDOT was designed, then a quinoidal conjugated polymer PbQPheDOT-2FT2 was synthesized by using bQuPheDOT monomer. It was found that the prepared quinoid monomer bQuPheDOT exhibited only (Z, E, Z) single isomer configuration, accomplished by steric hindrance between aryl rings and electrostatic intramolecular interaction. The employment of phenyl rings in quinoid core had effects on decrease of the electron-releasing mesomeric effect into conjugated backbone as well as the enhancement of molecular packing. We will explain the effect of the introducing phenylene unit in quinoid core in relation to optical, electrochemical and charge transport properties for quinoidal polymers.