http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
안진수,김길환,이관일,이경식,이상배,Ahn, Jin-Soo,Kim, Gil-Hwan,Lee, Kwan-Il,Lee, Kyung-Shik,Lee, Sang-Bae 한국광학회 2010 한국광학회지 Vol.21 No.5
본 논문에서는 포토닉 밴드갭 광섬유(Photonic Bandgap Fiber: PBGF) 사이에 중공광섬유(Hollow Optical Fiber: HOF)를 융착 접속시켜 만든 광섬유 간섭계와 넓은 모드 면적을 가지는 광자결정 광섬유(Large Mode Area-Photonic Crystal Fiber: LMA-PCF)사이에 HOF를 융착접속시켜 만든 광섬유 간섭계의 온도 및 스트레인에 대한 광학적 특성을 분석하였다. PBGF 또는 LMA-PCF와 HOF의 융착접속시 광섬유내 공기구멍을 최대한 유지하도록 융착조건을 최적화하여 접속 손실을 줄였다. PBGF와 HOF로 구성된 광섬유 간섭계의 온도 및 스트레인에 대한 민감도는 각각 15.4 pm/$^{\circ}C$와 0.24 pm/${\mu}\varepsilon$으로 측정되었으며, LMA-PCF와 HOF로 구성된 광섬유 간섭계의 온도 및 스트레인에 대한 민감도는 각각 17.4 pm/$^{\circ}C$와 0.2 pm/${\mu}\varepsilon$으로 측정되었다. We report temperature and strain sensing characteristics of two kinds of in-line fiber interferometers. One interferometer consists of a section of Hollow Optical Fiber(HOF) spliced between two Photonic Bandgap Fibers(PBGF) and the other is built by splicing a section of HOF between two Large Mode Area-Photonic Crystal Fibers(LMA-PCF). To minimize the splice losses, we carefully optimized the heating time and arc current of the splicer so as not to collapse the air holes of the fiber. It is found that the first interferometer has a temperature sensitivity of 15.4 pm/$^{\circ}C$ and a strain sensitivity of 0.24 pm/${\mu}\varepsilon$. The other interferometer exhibits a temperature sensitivity of 17.4 pm/$^{\circ}C$ and a strain sensitivity of 0.2 pm/${\mu}\varepsilon$.
인공타액에서 은-함유 결찰용 고무링의 은 이온 유리량에 대한 평가
안진수(Jin-Soo Ahn),황은주(Eun-ju Hwang),이동렬(Dong-Yul Lee),임용규(Yong-Kyu Lim) 대한치과재료학회 2010 대한치과재료학회지 Vol.37 No.4
The aim of this in-vitro investigation was to determine the amount and pattern of silver ion release from silver-containing elastomers in artificial saliva. Open group (n=10, the cap of each bottle was opened on a regular basis during the experiment) and Seal groups (n=40, the cap of the bottle was remained closed throughout the experiment) consisted of polystyrene bottles containing 2mL of artificial saliva maintained at 37℃ in oven with 20 silver-containing elastomers stretched over stainless steel brackets placed in each individual bottles. A polystyrene bottle containing only artificial saliva and 20 stainless steel brackets was used as control. The amount of silver ion release was measured once a day for 7 days (T1 - T7) and then once a week (T8 - T10) for the following 3 weeks in Open group. After the supernatant solution was decanted to measure the amount of ion release, fresh artificial saliva was added in each bottle. In Seal groups (S - 1, 2, 3, 4), cumulative silver ion was measured after 1, 2, 3 and 4 weeks for each group without changing sample solutions. Control was also measured after 4 weeks. Following results were obtained. The silver-containing elastomer showed a high initial silver ion release during the first week and showed declining tendency in the amount of silver ion release over the time period in both Open and Seal groups. Open group showed higher amount of daily ion release than Seal groups which may be attributed to the oxygen contact in Open group. Thus, the initial burst of silver ion release and the varying conditions of oral environment should be taken into consideration in the clinical use of silver-containing elastomer.
안진수(Jin-Soo Ahn),이찬규(Chan-Kyu Lee),송오섭(Ohseop Song) 한국소음진동공학회 2019 한국소음진동공학회 논문집 Vol.29 No.3
The KDamper is a new passive vibration isolation and damping concept based on the incorporation of negative stiffness elements. In this study, a mathematical model of the KDamper system is established and an analysis on the vibration isolation performance of a KDamper system is performed considering the effect of nonlinear negative stiffness. The results obtained are compared with those obtained using an existing tuned mass damper system in terms of transfer functions and the magnitude of added mass, which affects the vibration responses of the systems. Pertinent conclusions on the effectiveness of the KDamper system are derived.