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        검색결과 610

        61.
        2016.08 구독 인증기관·개인회원 무료
        K. S. Ki, S. B. Park, D. H. Lim, T. I. Kim, S. M. Park, J. h. Park, S. H. Choi, J. S. Lee, E. G. Kwon, H. Y. Jeong, S. Y. Lee
        62.
        2016.08 구독 인증기관·개인회원 무료
        O. K. Han, H. H. Park, T. I. Park, T. H. Song, D. W. Kim, J. H. Ku, S. J. Kweon, J. W. Ahn, B. J. Kim
        63.
        2016.08 구독 인증기관·개인회원 무료
        J. H. Ku, O. K. Han, M. T. Kim, S. J. Kweon, J. W. Ahn, B. J. Kim
        65.
        2016.08 구독 인증기관·개인회원 무료
        K. -W. Lee, M. A. Rahman, S.-H. Lee, k.-Y. Kim, H. T. Hwang, H. C. Ji, H. S. Park
        66.
        2016.08 구독 인증기관·개인회원 무료
        S. H. Kim, K. J. Hwang, D. S. Kim, M. S. Kim, Y. H. Kang, Y. J. Kim, S. W. Lee, H. S. Chae, N. G. Park
        67.
        2016.08 구독 인증기관·개인회원 무료
        K. J. Hwang, D. S. Kim, S. H. Kim, M. S. Kim, Y. H. Kang, Y. J. Kim, W. S. Lee, H. S. Chae, N. G. Park
        68.
        2016.06 KCI 등재 SCOPUS 구독 인증기관 무료, 개인회원 유료
        I.-G. Shin, Y.-H. Ryu, A. Udalski, M. Albrow, S.-M. Cha, J.-Y. Choi, S.-J. Chung, C. Han, K.-H. Hwang, Y. K. Jung, D.-J. Kim, S.-L. Kim, C.-U. Lee, Y. Lee, B.-G. Park, H. Park, R. W. Pogge, J. C. Yee, P. Pietrukowicz, P. Mroz, S. Koz lowski, R. Poleski, J. Skowron, I. Soszynski, M. K. Szymanski, K. Ulaczyk, L. Wyrzykowski, M. Pawlak, A. Gould
        We report the characterization of a massive (mp = 3:91:4Mjup) microlensing planet (OGLE- 2015-BLG-0954Lb) orbiting an M dwarf host (M = 0:33  0:12M ) at a distance toward the Galactic bulge of 0:6+0:4 􀀀0:2 kpc, which is extremely nearby by microlensing standards. The planet-host projected separation is a?  1:2AU. The characterization was made possible by the wide- eld (4 deg2) high cadence (􀀀 = 6 hr􀀀1) monitoring of the Korea Microlensing Telescope Network (KMTNet), which had two of its three telescopes in commissioning operations at the time of the planetary anomaly. The source crossing time t = 16 min is among the shortest ever published. The high-cadence, wide- eld observations that are the hallmark of KMTNet are the only way to routinely capture such short crossings. High-cadence resolution of short caustic crossings will preferentially lead to mass and distance measurements for the lens. This is because the short crossing time typically implies a nearby lens, which enables the measurement of additional e ects (bright lens and/or microlens parallax). When combined with the measured crossing time, these e ects can yield planet/host masses and distance.
        4,000원
        74.
        2015.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        P.A.R. Ade, Y. Akiba, A.E. Anthony, K. Arnold, M. Atlas, D. Barron, D. Boettger, J. Borrill, S. Chapman, Y. Chinone, M. Dobbs, T. Elleflot, J. Errard, G. Fabbian, C. Feng, D. Flanigan, A. Gilbert, W. Grainger, N.W. Halverson, M. Hasegawa, K. Hattori, M. Hazumi, W.L. Holzapfel, Y. Hori, J. Howard, P. Hyland, Y. Inoue, G.C. Jaehnig, A.H. Jaffe, B. Keating, Z. Kermish, R. Keskitalo, T. Kisner, M. LeJeune, A.T. Lee, E.M. Leitch, E. Linder, M. Lungu, F. Matsuda, T. Matsumura, X. Meng, N.J. Miller, H. Morii, S. Moyerman, M.J. Myers, M.J. Myers, M. Navaroli, H. Nishino, A. Orlando, H. Paar, J. Peloton, D. Poletti, E. Quealy, G. Rebeiz, C.L. Reichardt, P.L. Richards, C. Ross, I. Schanning, D.E. Schenck, B.D. Sherwin, A. Shimizu, C. Shimmin, M. Shimon, P. Siritanasak, G. Smecher, H. Spieler, N. Stebor, B. Steinbach, R. Stompor, A. Suzuki, S.Takakura, T. Tomaru, B. Wilson, A. Yadav, O. Zahn
        Polarbear is a ground-based experiment located in the Atacama desert of northern Chile. The experiment is designed to measure the Cosmic Microwave Background B-mode polarization at several arcminute resolution. The CMB B-mode polarization on degree angular scales is a unique signature of primordial gravitational waves from cosmic in ation and B-mode signal on sub-degree scales is induced by the gravitational lensing from large-scale structure. Science observations began in early 2012 with an array of 1,274 polarization sensitive antenna-couple Transition Edge Sensor (TES) bolometers at 150 GHz. We published the first CMB-only measurement of the B-mode polarization on sub-degree scales induced by gravitational lensing in December 2013 followed by the first measurement of the B-mode power spectrum on those scales in March 2014. In this proceedings, we review the physics of CMB B-modes and then describe the Polarbear experiment, observations, and recent results.
        3,000원
        75.
        2013.08 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Chang W. Choi, K. H. Kim, S. H. Choi
        An experiment was conducted to study effects of abomasal infusions of casein, glucose or starch on milk production and blood metabolites in dairy cows. Four lactating cows (559±41.9kg) fitted with 100 mm ruminal cannulas were used in a 4 × 4 Latin square experiment. The cows were given access ad libitum to grass silage and received 6.2 kg dry matter (DM) of a mixture of rapeseed meal (5.3kg/d DM) and barley grain (0.9kg/d DM) as a basal diet (CON), the basal diet plus intra-abomasal infusions of 270 g sodium caseinate (CAS), 300 g of glucose (GLU) or 243 g of starch (STA) starting at 09:00 h each day. Abomasal infusion of different nutrients did not affect (p>0.05) grass silage intake and rumen fermentation parameters (rumen pH, ammonia N and volatile fatty acids). As unexpected, milk yield and composition data did not differ between CON and the treated groups (p>0.05). Most of plasma amino acids were not significantly (p>0.05) affected by the abomasal infusions of CAS, GLU or STA except for histidine, tryptophan and glycine. Although histidine, known as the first limiting amino acid in dairy cows fed grass silage based diets, was significantly (p=0.003) increased by CAS, we failed to result in a clear increase in milk yield and protein yield. This discrepancy between plasma AA profiles and milk production could be presumably explained by relatively high concentration of total amino acids in the present study (2,039μmol/l).
        4,000원
        76.
        2013.03 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Y. LEE, Y. S. KIM, H. W. KANG, J. H. JUNG, C. H. LEE, I. S. YIM, B. G. KIM, H. G. KIM, K. T. KIM
        We present a multi-dimensional reduction method of the surveyed cube database obtained using a single- dish radio telescope in Taeduk Radio Astronomy Observatory (TRAO). The multibeam receiver system installed at the 14 m telescope in TRAO was not optimized at the initial stage, though it became more stabilized in the following season. We conducted a Galactic Plane survey using the multibeam receiver system. We show that the noise level of the first part of the survey was higher than expected, and a special reduction process seemed to be definitely required. Along with a brief review of classical methods, a multi-dimensional method of reduction is introduced; It is found that the ‘background’ task within IRAF (Image Reduction and Analysis Facility) can be applied to all three directions of the cube database. Various statistics of reduction results is tested using several IRAF tasks. The rms value of raw survey data is 0.241 K, and after primitive baseline subtraction and elimination of bad channel sections, the rms value turned out to be 0.210 K. After the one-dimensional reduction using ‘background’ task, the rms value is estimated to be 0.176 K. The average rms of the final reduced image is 0.137 K. Thus, the image quality is found to be improved about 43% using the new reduction method.
        4,000원
        77.
        2012.10 구독 인증기관·개인회원 무료
        K. H. Chung, J. H. Son, B. Y. Jung, S. J. Sa, S. Y. Baek, I. C. Kim
        78.
        2012.10 구독 인증기관·개인회원 무료
        J. I. Bang, J. I. Jin, B. H. Choi, S. S. Kim, J. K. Lee, I. K. Kong
        79.
        2012.09 KCI 등재 구독 인증기관·개인회원 무료
        K. MATSUTA, P. GANDHI, T. DOTANI, T. NAKAGAWA, N. ISOBE, Y. UEDA, K. ICHIKAWA, Y. TERASHIMA, S. OYABU, I. YAMAMURA, L. STAWARZ
        We combine data from two all-sky surveys, the Swift/Burst Alert Telescope 22 Month Source Catalog and the AKARI Point Source Catalogue, in order to study the connection between the hard X-ray (> 10 keV) and infrared (IR) properties of local active galactic nuclei (AGN). We find two photometric diagnostics are useful for source classification: one is the X-ray luminosity vs. IR color diagram, in which type 1 radio-loud AGN are well isolated from other AGN. The second one uses the X-ray vs. IR color-color diagram as a redshift-independent indicator for identifying Compton-thick (CT) AGN. Importantly, CT AGN and starburst galaxies in composite systems can also be separated in this plane based upon their hard X-ray fluxes and dust temperatures. This diagram may be useful as a new indicator to classify objects in new surveys such as with WISE and NuSTAR.
        80.
        2012.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        H. MATSUHARA, T. WADA, T. TAKAGI, T. NAKAGAWA, K. MURATA, S. CHUREI, T. GOTO, S. OYABU, T.T. TAKEUCHI, Y. OHYAMA, T. MIYAJI, M. KRUMPE, H. M. LEE, M. IM, S. SERJEANT, C. P. PEASON, G. WHITE, M. A. MALKAN, H. HANAMI, T. ISHIGAKI, D. BURGARELLA, AKARI NEP TEAM
        An overview of the North Ecliptic Pole (NEP) deep multi-wavelength survey covering from X-ray to radio wavelengths is presented. The main science objective of this multi-wavelength project is to unveil the star-formation and AGN activities obscured by dust in the violent epoch of the Universe (z=0.5-2), when the star formation and black-hole evolution activities were much stronger than the present. The NEP deep survey with AKARI/IRC consists of two survey projects: shallow wide (8.2 sq. deg, NEP-Wide) and the deep one (0.6 sq. deg, NEP-Deep). The NEP-Deep provides us with a 15 μm or 18 μm selected sample of several thousands of galaxies, the largest sample ever made at these wavelengths. A continuous filter coverage at mid-IR wavelengths (7, 9, 11, 15, 18, and 24 μ m ) is unique and vital to diagnose the contribution from starbursts and AGNs in the galaxies at the violent epoch. The recent updates of the ancillary data are also provided: optical/near-IR magnitudes (Subaru, CFHT), X-ray (Chandra), FUV/NUV (GALEX), radio (WSRT, GMRT), optical spectra (Keck/DEIMOS etc.), Subaru/FMOS, Herschel/SPIRE, and JCMT/SCUBA-2.
        4,000원
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