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Time Series Analysis of the Dollar/Won Exchange Rate
Raouf S. Hanna,Michael G. Vogt 서울대학교 경제연구소 1991 Seoul journal of economics Vol.4 No.4
This paper employs the sticky-price asset model (Hooper and Morton 1982) and the Sims' innovation accounting technique to assess the relative contributions of the determinants of the U.S. Dollar/Korean Won exchange rate. Monthly data during the period July 1974 through October 1988 are used in the analysis. Tests are made for stationarity and cointegration of the variables. The results indicate that in the short-run more than half of the forecast error variance of the (change in the log of the) exchange rate is due to its own innovations. The relative importance of economic fundamentals becomes greater as the forecast horizon increases. In the long-run (3 years) innovations in economic conditions account for about 70% of the forecast error variance of the exchange rate.
Fast and reversible hydrogen storage in channel cages of hydroquinone clathrate
Han, K.W.,Lee, Y.J.,Jang, J.S.,Jeon, T.I.,Park, J.,Kawamura, T.,Yamamoto, Y.,Sugahara, T.,Vogt, T.,Lee, J.W.,Lee, Y.,Yoon, J.H. North Holland ; Elsevier Science Ltd 2012 Chemical physics letters Vol.546 No.-
Guest-free hydroquinone (HQ) clathrate was synthesized by the gas-phase reaction between host HQ and guest CO<SUB>2</SUB> molecules, followed by removal of the CO<SUB>2</SUB> guests by controlled heating process. The H<SUB>2</SUB> storage capacity of the guest-free HQ clathrate is highly sensitive to the loading pressure; at 298K, it was found to be 0.19 wt.% at 10MPa and 0.38 wt.% at 35MPa. In particular, the guest-free HQ clathrate also exhibits an extremely fast uptake and release of H<SUB>2</SUB> in a time scale of a few seconds.
김강민,장정균,천무영,박병곤,형식,한인우,윤태석,STEVEN S. VOGT 한국천문학회 2000 天文學論叢 Vol.15 No.2
The BOES (BOAO Echelle Spectrograph), a fiber-fed echelle spectrograph of the BOAO 1.8 m telescope, has been designed and now is being manufactured. The BOES follows a white pupil design collimated with two off-axis parabolic mirrors. The 136mm collimating beam leaving the 41.59 grooves/mm R4 echelle grating is refocused near the narrow folding mirror. Through the two cross-disperser prisms and ϕ250mm(f/1.5) ϕ250mm(f/1.5) transmission camera, the beam images on EEV 2k×4k 2k×4k CCD. The BOES can take the wavelength range of 3700 to 10100Å at a single spot with spectral resolution R = 20000 to 40000 depending on the fiber set employed. We describe the key sciences and performance, current status of construction, and future plan of the BOES.
DESIGN AND MANUFACTURING OF THE CASSEGRAIN INTERFACE MODULE OF THE BOAO ECHELLE SPECTROGRAPH
KIM KANG-MIN,JANG BE-HO,HAN INWOO,JANG JEONG GYUN,SUNG HYUN CHUL,CHUN MOO-YOUNG,HYUNG SIEK,YOON TAE-SEOG,VOGT STEVEN S. The Korean Astronomical Society 2002 Journal of The Korean Astronomical Society Vol.35 No.4
Cassegrain interface module (CIM) of the fiber-fed high resolution echelle spectrograph has been designed and manufactured for the 1.8 m reflector at the Bohynsan Optical Astronomy Observatory. We also constructed a long slit spectrograph attached to this CIM, which would replace the earlier rather inefficient medium dispersion spectrometer. We present detailed description for design and manufacturing concepts of the CIM which consists of a slit assembly, slit monitoring system, calibration lamp system and a long slit spectrograph, in order to provide how the overall system and each part. are constructed. The preliminary performance test carried out so far seems to indicate a successful result.
김강민,장정균,천무영,박병곤,형식,한인우,윤태석,KIM KANG-MIN,JANG JEONG GYUN,CHUN MOO-YOUNG,PARK BYEONG-GON,HYUNG SIEK,HAN INWOO,YOON TAE SEOG,VOGT STEVEN S. 한국천문학회 2000 天文學論叢 Vol.15 No.suppl1
The BOES (BOAO Echelle Spectrograph), a fiber-fed echelle spectrograph of the BOAO 1.8 m telescope, has been designed and now is being manufactured. The BOES follows a white pupil design collimated with two off-axis parabolic mirrors. The 136mm collimating beam leaving the 41.59 grooves/mm R4 echelle grating is refocused near the narrow folding mirror. Through the two cross-disperser prisms and $\phi250 mm(f/1.5)$ transmission camera, the beam images on EEV $2k\times4k$ CCD. The BOES can take the wavelength range of 3700 to $10100{\AA}$ at a single spot with spectral resolution R = 20000 to 40000 depending on the fiber set employed. We describe the key sciences and performance, current status of construction, and future plan of the BOES.