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        검색결과 2,016

        325.
        2015.10 구독 인증기관 무료, 개인회원 유료
        It has been firmly concluded that there isn’t any new evidence to negate already proven facts about the Jeju 4.3 Massacre. The contentions made by the Rightist group are very subjective and self-centered and distorted interpretation. This book is written by the ultra-right winged, perpetrators of Jeju 4.3 Massacre. Their contention is completely, and without exception, distorted. They are trying to state that the Jeju 4.3 never took place and that no new inquiry investigation needs to ensue. Their contentions are totally false and without merit. Social Healing begins with the exchange of truth and justice. The perpetrators need to acknowledge the crimes committed and seek forgiveness. The victims can then accept the remorseful apologies and then begin the social healing through the justice process. These processes then ultimately lead to social healing through justice for all parties involved.
        4,600원
        326.
        2015.10 구독 인증기관·개인회원 무료
        Our professors and teachers have been cooperated with professors and researchers of National Sciences Museum of Korea for the project of “Biodiversity of Mongolian” since 2012. This project is to study for Mongolian biodiversity by Mongolian and Korean scientists and to support advanced training for our professionals, to increase capabilities and training new methodologies for students and to publish articles from the conducted research. Our researches conducted following areas such as in Ikh Nart Nature reserve area in 2013, Khan Khentii strictly protected area in 2014, our university’s Shatan research camp in 2014, and Kherlen Toonot Nature reserve area in 2015. From these studies, we published articles of “Biodiversity of Ikh Nart Nature reserve” and “Biodiversity of Shatan area” in Korean journals. Our teachers anticipated for publishing guidebook “Methods to preparing natural taxidermy and herbarium” in Mongolian prepared by Korean scientists to useful for students in laboratory and field. Teachers are visited in National science museum of Korea, such as Mr. J.Ariunbold studied in 2013 and Dr. M.Munkhbaatar visited for 14-30 days to develop samples collected from field research. Our teaching assistant G.Onolragchaa is enrolled as doctoral student for Chunnam University in 2015 according to this project grant. Also Mr. P.Erdenetushig and one student are planning to visit in October for developing collected samples. In 2015, School of Mathematics and Natural Sciences is willing to establish “Mongolian and Korean monitoring center”, it’s in compromise of both side, and Mongolian National University of education is prepared a room for this center. Коrean colleague provided USD 10.000 worth of new equipment such as electric motor, boryoscope, tent trap, Sherman trap, aquatic net, sweep net, glass vials and bottles for research and teaching of MNUE. Framework of Mongolian-Korean cooperative research project “Biodiversity of Mongolia” was held a conference topic on “Biological resource management and remote sensing survey” in Ulaanbaatar 2014 and 2015. Our scientists are planning future collaboration with scientists of Korean ocean research institute, Ornithological Society of Korea, Korea Institute of Environmental Ecology. Official cooperative agreement with MNUE To cooperate with teachers of MNUE for maintaining Mongolian Natural History Museum and public education To initiate Korean- Mongolian cooperative non-governmental organization To implement a project for public outreach (forest and animal breeding) To establish long term monitoring site in special protected area Genetic research on problems of plant and animal classification; To train graduate students for modern research methods Genetic study on less studied or rare species of museum specimen Genetic and morphological study on vertebrates Scale up biodiversity study and do monitoring (already done Ikh Nart and Shatan) To extend research projects in Mongolia and do long term monitoring study
        327.
        2015.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The Kepler mission has shown that small planets are extremely common. It is likely that nearly every star in the sky hosts at least one rocky planet. We just need to look hard enough - but this requires vast amounts of telescope time. MINERVA (MINiature Exoplanet Radial Velocity Array) is a dedicated exoplanet observatory with the primary goal of discovering rocky, Earth-like planets orbiting in the habitable zone of bright, nearby stars. The MINERVA team is a collaboration among UNSW Australia, Harvard-Smithsonian Center for Astrophysics, Penn State University, University of Montana, and the California Institute of Technology. The four-telescope MINERVA array will be sited at the F.L. Whipple Observatory on Mt Hopkins in Arizona, USA. Full science operations will begin in mid-2015 with all four telescopes and a stabilised spectrograph capable of high-precision Doppler velocity measurements. We will observe ~100 of the nearest, brightest, Sun-like stars every night for at least five years. Detailed simulations of the target list and survey strategy lead us to expect 154 new low-mass planets.
        4,000원
        328.
        2015.09 KCI 등재 구독 인증기관·개인회원 무료
        We have been performing daily VLBI monitoring of the ux density of Sagittarius (Sgr) A* at 22 GHz from February 2013 to August 2014 using a sub-array of the Japanese VLBI Network (JVN). The purpose of this monitoring is to explore the ux density variability at daily time resolution for a period longer than one year with the G2 cloud approaching. The ux density of Sgr A* is basically stable during the observational period, though there are some small variations. The average and scattering range are consistent with the previously observed values. We have observed no strong are of Sgr A* although it is near the expected peri-center passing.
        329.
        2015.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        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
        330.
        2015.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        We first deduce a uniform formula forthe Fermi energy of degenerate and relativistic electrons in the weak-magnetic field approximation. Then we obtain an expression of the special solution for the electron Fermi energy through this formula, and express the electron Fermi energy as a function of electron fraction and matter density. Our method is universally suitable for relativistic electron- matter regions in neutron stars in the weak-magnetic field approximation.
        3,000원
        331.
        2015.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Galaxies can be "pre-processed" in the low-density outskirts by ambient medium in the filaments or tidal interactions with other galaxies while falling into the cluster. In order to probe how early on and by which mechanisms galaxies can be affected before they enter high-density cluster environments, we are carry- ing out an atomic hydrogen (H i) imaging study of a sample of galaxies selected from three filamentary structures around the Virgo cluster. Our sample consists of 14 late-type galaxies, which are potentially interacting with their surroundings. The Hi observations have been done using the Westerbork Synthesis Radio Telescope, the Giant Metrewave Radio Telescope, and the Jansky Very Large Array with column density sensitivity of ≈ 3-5 X 1019 cm-2 in 3σ per channel, which is low enough to detect faint Hi features in the outer disks of galaxies. In this work, we present the Hi data of two galaxies that were observed with GMRT. We examine the Hi morphology and kinematics to find the evidence for gas-gas and/or tidal interactions, and discuss which mechanism(s) could be responsible for pre-processing in these cases.
        3,000원
        332.
        2015.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        We present a kinematic study of the parsec-scale radio jet in OJ 287, one of the most studied BL Lac objects, during γ-ray ares, to explore the relation between parsec-scale radio jet activity and γ-ray emission. The 22-GHz light curve of OJ 287 show three obvious are events around 2011 May, 2011 October, and 2012 March. The second radio are occurred during the γ-ray aring period, and the third radio are seemed to precede the γ-ray are by one month. One jet component moved outward with respect to the core component with an apparent superluminal speed (~ 11c) from 2010 November to 2011 November. Then it changed direction, moving apparently inward in 2011 November, when the γ-ray are occurred. The observed apparent inward motion of the jet at 22 GHz could be caused by a new jet component, unresolved at 22 GHz, in the innermost region.
        3,000원
        333.
        2015.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        We identify a strong lensing galaxy in the cluster IRC 0218 that is spectroscopically confirmed to be at z = 1:62, making it the highest-redshift strong lens galaxy known. The lens is one of the two brightest cluster galaxies and lenses a background source galaxy into an arc and a counterimage. With Hubble Space Telescope (HST) grism and Keck/LRIS spectroscopy, we measure the source redshift to be zS = 2:26. Using HST imaging, we model the lens mass distribution with an elliptical power-law pro le and account for the effects of the cluster halo and nearby galaxies. The Einstein radius is θE = 0.38+0.02-0.01" (3.2+0.2 -0.1 kpc) and the total enclosed mass is Mtot(< θE) = 1.8+0.2 -0.1 X 1011 M⊙. We estimate that the cluster environment contributes ~ 10% of this total mass. Assuming a Chabrier IMF, the dark matter fraction within θE is fChab DM = 0.3+0.1 -0.3, while a Salpeter IMF is marginally inconsistent with the enclosed mass (fSalp DM = -0.3+0.2 -0.5).
        3,000원
        334.
        2015.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        We have conducted a near-infrared monitoring campaign at the UK InfraRed Telescope (UKIRT), of the Local Group galaxy M33. The main aim was to identify stars in the very nal stage of their evolution, and for which the luminosity is more directly related to the birth mass than the more numerous less-evolved giant stars that continue to increase in luminosity. The pulsating giant stars (AGB and red supergiants) are identified and their distributions are used to derive the star formation rate as a function of age. These stars are also important dust factories; we measure their dust production rates from a combination of our data with Spitzer Space Telescope mid-IR photometry. The mass-loss rates are seen to increase with increasing strength of pulsation and with increasing bolometric luminosity. Low-mass stars lose most of their mass through stellar winds, but even super-AGB stars and red superginats lose ~40% of their mass via a dusty stellar wind. We construct a 2-D map of the mass-return rate, showing a radial decline but also local enhancements due to agglomerations of massive stars. By comparing the current star formation rate with total mass input to the ISM, we conclude that the star formation in the central regions of M33 can only be sustained if gas is accreted from further out in the disc or from circum-galactic regions.
        3,000원
        335.
        2015.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Gravitational interactions — mergers and y-by encounters — between galaxies play a key role as the drivers of their evolution. Here we perform a cosmological N-body simulation using the tree-particle-mesh code GOTPM, and attempt to separate out the effects of mergers and y-bys between dark matter halos. Once close pair halos are identified by the halo finding algorithm PSB, they are classified into mergers (E12 < 0) and y-by encounters (E12 > 0) based on the total energy (E12) between two halos. The y-by and merger fractions as functions of redshift, halo masses, and ambient environments are calculated and the result shows the following: (1) Among Milky-way sized halos (0:33-2:0 X 1012h-1M⊙), 5:37±0:03% have experienced major y-bys and 7.98±0.04% have undergone major mergers since z ~ 1; (2) Among dwarf halos (0:1 - 0.33 X 1012h-1M⊙), 6.42 ± 0.02% went through major y-bys and 9.51 ± 0.03% experienced major mergers since z ~ 1; (3) Milky-way sized halos in the cluster environment experienced fly-bys (mergers) 4-11(1.5 - 1.7) times more frequently than those in the field since z ~ 1; and (4) Approaching z = 0, the y-by fraction decreases sharply with the merger fraction remaining constant, implying that the empirical pair/merger fractions (that decrease from z ~ 1) are in fact driven by the fly-bys, not by the mergers themselves.
        3,000원
        336.
        2015.09 KCI 등재 구독 인증기관·개인회원 무료
        The results of spectral studies of the CTTS type young star RY Tau with spectrograms of the ultraviolet and the visual ranges are presented. We show the first detection of periodic variability of the emission line intensities in UV and visual ranges with a period of 23 days.
        337.
        2015.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The Eclipsing Binaries Minima (BIMA) Monitoring Project is a CCD-based photometric observational program initiated by Bosscha Observatory - Lembang, Indonesia in June 2012. Since December 2012 the National Astronomical Research Institute of Thailand (NARIT) has joined the BIMA Project as the main partner. This project aims to build an open-database of eclipsing binary minima and to establish the orbital period of each system and its variations. The project is conducted on the basis of multisite monitoring observations of eclipsing binaries with magnitudes less than 19 mag. Di erential photometry methods have been applied throughout the observations. Data reduction was performed using IRAF. The observations were carried out in BVRI bands using three di erent small telescopes situated in Indonesia, Thailand, and Chile. Computer programs have been developed for calculating the time of minima. To date, more than 140 eclipsing binaries have been observed. From them 71 minima have been determined. We present and discuss the O-C diagrams for some eclipsing binary systems.
        4,000원
        338.
        2015.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        NGC147 and NGC185, paired satellites of the Andromeda galaxy, possess the same order of mass and analogous structures, but they show di erent star formation and different amounts of interstellar gas and dust. Therefore, we present the first reconstruction of the star formation history of NGC147 and NGC185. Asymptotic Giant Branch stars are highly evolved stars that are brightest in K-band. This maximum K-band magnitude is related to the birth mass of stars. As a result, we have found a 9.9 Gyrold single star formation epoch for NGC185 followed by relatively continuous star formation. NGC147, however, has passed through two star formation episodes; one is as old as ~6 Gyr and the other is as recent as 850 Myr. Asymptotic Giant Branch stars are also important dust factories; by fitting Spectral Energy Distributions to observed near and mid infrared data for each star, we were able to measure the dust production rates of individual stars; on order of 10-5M⊙yr-1. Hence, we estimate the total mass entering the interstellar medium to be 1.06 X 10-4M⊙ yr-1 and 2.89 X 10-4M⊙ yr-1 for NGC147 and NGC185.
        3,000원
        339.
        2015.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        We describe a survey of nearby core-collapse supernova (SN) explosion sites using integral field spec- troscopy (IFS) techniques, which is an extension of the work described in Kuncarayakti et al. (2013). The project aims to constrain SN progenitor properties based on the study of the immediate environment of the SN. The stellar populations present at the SN explosion sites are studied by means of integral field spectroscopy, which enables the acquisition of both spatial and spectral information of the object simultaneously. The spectrum of the SN parent stellar population gives an estimate of its age and metal- licity. With this information, the initial mass and metallicity of the once coeval SN progenitor star are derived. While the survey is mostly done in optical, the additional utilization of near-infrared integral field spectroscopy assisted with adaptive optics (AO) enables us to examine the explosion sites in high spatial detail, down to a few parsecs. This work is being carried out using multiple 2-8 m class telescopes equipped with integral field spectrographs in Chile and Hawaii.
        4,000원
        340.
        2015.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        We present preliminary results from OH ground state phase referenced observations carried out with the Multi Element Radio Linked Interferometer Network (MERLIN) and e-MERLIN towards the massive star forming region W49A. There are three active SFRs within this complex: W49 North (W49 N), W49 South (W49 S) and W49 South West (W49 SW). The first epoch of observations was obtained in 2005 with MERLIN while the second epoch was obtained in 2013 with the e-MERLIN upgraded system. In this paper, we present 1665 and 1720 MHz maser emission towards W49 S and W49 SW. Overall, both epochs show good agreement with the previous observations of Argon et al. (2000) carried out with the Very Large Array (VLA). The better sensitivity and wider velocity coverage of the MERLIN/e-MERLIN observations allowed us to discover a new 1720 MHz OH maser site in W49 S.
        3,000원