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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean earth science society
Journal Basic Information
Journal DOI :
The Korean Earth Science Society
Editor in Chief :
Volume & Issues
Volume 27, Issue 7 - Dec 2006
Volume 27, Issue 6 - Dec 2006
Volume 27, Issue 5 - Oct 2006
Volume 27, Issue 4 - Aug 2006
Volume 27, Issue 3 - Jun 2006
Volume 27, Issue 2 - Apr 2006
Volume 27, Issue 1 - Feb 2006
Selecting the target year
Analyses of the Aims of Laboratory Activity, Interaction, and Inquiry Process within Laboratory Instruction in Secondary School Science
Yang, Il-Ho ; Jeong, Jin-Woo ; Kim, Young-Shin ; Kim, Min-Kyung ; Cho, Hyun-Jun ;
Journal of the Korean earth science society, volume 27, issue 5, 2006, Pages 509~520
The purpose of this study was to analyze laboratory instructions in a secondary school science with an analysis instrument on science laboratory instruction. For its purpose, we used an instrument that analyzes three dimensions of the secondary laboratory instructions. This analysis instrument was composed of 3 categories (the aim of the laboratory activity, interaction, and inquiry process) which are spread into 20 sub-categories, and its validity was checked by four science educators with factor of 0.89. For its purpose, 21 sessions of lab instructions were video-recorded and transcribed. According to the results, in the aims category, the instructions mainly focused on two aims; acquiring the declarative knowledge and increasing attitudes toward science. In the interaction category, some of the observations made were that the teachers's questions could not gather the students' divergent thinking, their directive instructions were centered around themselves rather than giving opportunities for students to be centered within laboratory activities, and students' interaction were rarely shown. Therefore, interaction was classified as level I. In the inquiry process, presenting phenomenon or questionings about the subjects were little observed, and students' hypothesizing and predicting were almost nonexistent. Most of the activity designs within lab session were given from the teachers' directions or worksheets, and students solely focused on data collecting and recording. Hence, inquiry process were classified level I.
A Working Standard Technique far Determination of Interference Correction Factors and Preparation of Standard Materials for CHIME Dating
Cho, Deung-Lyong ; Kato, Takenori ; Suzuki, Kazuhiro ;
Journal of the Korean earth science society, volume 27, issue 5, 2006, Pages 521~527
The EPMA analysis for CHIME dating requires standard materials, which include nuclear fuel materials that are rare and sensitive to handle. Any laboratory that does not meet these standards has had difficulties adopting the CHIME dating method. We have developed a working standard technique for CHIME dating to prepare standard materials without use of nuclear fuel materials. Mineral samples, such as small pieces of monazite that are homogeneous in X-ray intensities, are calibrated using well-characterized primary standards in one laboratory. Once this procedure is done, they can be readily usable as working standards in the other laboratories, only with measurement of X-ray intensities. This method is applicable in preparing standard materials for both chemical compositions and determination of X-ray interference correction factors, and it is independent from chemical composition of mineral standard.
Petrological Study on the Intermediate-basic Plutonic Rocks in the Southwestern Part of the Korean Peninsula
Kim, Yong-Jun ; Park, Jae-Bong ; Park, Byung-Kyu ;
Journal of the Korean earth science society, volume 27, issue 5, 2006, Pages 528~538
Main aspect of this study is to clarify the petrochemistry and petrogenesis of intermediated-basic plutons located in the southwestern part of the Korean peninsula. These Intermediated-basic plutons consist of Pre-Cambrian anorthosite-gabbro, Triassic hornblende gabbro (Jirisan area), Jurassic diorite-syente (Jirisan and north area) and Cretaceous gabbro-diorite (south area). The Massif type anorthosite has multi intrusions, where each one intruded by gabbroic rocks, composed of gabbro, norite, troctolite and leucogabbro. In the variation diagram of the major-minor composition, AMF and Pl-Px-Ol diagrams, we suggest that intermediated-basic plutons in the southwestern part of the Korea show a trend consistent to Daly's value and calc-alkaline rock series. Accoding to REE (La/Yb)cw and Eu/Sm, these plutons are enriched with LREE than HREE, and emplaced by the tectonic setting in continent and/or continental margin.
A Study of Seismic Wave Propagation for Tunnel Exploration
Suh, Baek-Soo ; Oh, Seok-Hoon ; Sohn, Kwon-Ik ;
Journal of the Korean earth science society, volume 27, issue 5, 2006, Pages 539~547
The activity of the seismic wave propagation around the cavity is investigated for the exact inversion of the crosshole tomography data, in order to understand the possibility of the existence inside the underground cavity. It is found that the adequate frequency range for the tunnel investigation is about 2 kHz to 5 kHz, and the grid space should be set up to 1/10 of the wavelength. The propagation of the seismic wave near the cavity may go through or detour the cavity according to the seismic velocity inside the cavity. The detouring wave propagates with the seismic velocity of mother rock in spite of the velocity of inside of the cavity. The smaller the velocity difference is between the mother rock and cavity, the more frequent penetration of the seismic wave through the cavity appears.
Soil Characteristics on the Fluvial Surface in the Basin of Kyeongan-cheon (Stream)
Kang, Young-Pork ; Sin, Kwang-Sig ;
Journal of the Korean earth science society, volume 27, issue 5, 2006, Pages 548~556
The purpose of this study is to clarify the relict landform development of fluvial terrace and the soil characteristics occurring on the fluvial deposits. The physico-chemical properties of soil that are developed on terrace deposits and X-ray diffraction analysis of clay were investigated specifically. The horizon of
consists of silt loam with reddish-brown color (5YR4/3). Its soil structures is a weak, fine, subangular, and blocky, breaking to granular. The horizon of
are silt clay with either a yellowish red (5YR5/6), bright red (2.5YR4/6) color. This soil structure is weak, subangular, and blocky, with thin discontinuous bright red (2.5YR4/6) clay cutans and soft manganese concretions. This red soil structure is made on heavy-textures. It is packed compactly with parent materials of high fluvial surface sediments, and usually has a
profile, from top to bottom. In most cases, clay accumulation in the B-horizon and clay cutans on ped surfaces are observed, which means the argillic horizon has formed. The soils derived from fluvial surface deposits are associated with soils. The soils on the high fluvial surface are considered to be a kind of paleo-red soil which were developed by strong desilicification and rubefaction, and strong leaching of bases under warmer bio-climatic condition during the old Pleistocene period. According to these morphological and anlaytical characteristics,geomorphological features and bio-climatic conditions under which the soil have developed on the high terrace sediment indicate that the soil should be classified as paleo-red soils.
UBVI CCD Photometry of the Globular Cluster M30
Lee, Ho ; Jeon, Young-Beom ;
Journal of the Korean earth science society, volume 27, issue 5, 2006, Pages 557~568
We present CCD UBVI photometry for more than 10,000 stars in
field of the halo globular cluster M30. From a color-magnitude diagram, main sequence turnoff was obtained when
, respectively. From a (U-B)-(B-V) diagram, reddening parameter, E(B-V) equals
and a UV color excess
. The abundance is derived, where [Fe/H] equals
according to the photometric method and spectroscopic data. The observed luminosity function of M30 shows an excess in the number of red giants relative to the number of turnoff stars, when comparing with the predictions of canonical models. Using the Hipparcos parallaxes for subdwarfs, we estimate distance modulus,
. Using the R and R' method, we find helium abundances, Y(R) as
, Y(R') as
, respectively. Finally, the cluster' sage dispersion was deduced from 10.71 Gyr to 17 Gyr.
OASIS Spectral Images of the Seyfert galaxy NGC 5728
Hyung, Siek ; Son, Dong-Hoon ; Ferruit, Pierre ; Lee, Woo-Baik ;
Journal of the Korean earth science society, volume 27, issue 5, 2006, Pages 569~578
The distribution and kinematic information of the continuum,
, [O III], & [N II] images based on spectroscopic data secured with the OASIS at the Hawaii CFHT 3.6m telescope have been analyzed to study the physical characteristics of NGC 5728. The three bright regions-northwestern knot, southeastern knot, and the nucleus-exist within a
sky area which seem to indicate gas flows along the northwestern or western direction from the nucleus. We find that the center of a 10" diameter ring is at the northwestern knot, not at the galactic center. To further analyze the formation mechanism of such a ring, the kinematics of the nucleus and knot have been studied and the central structure of the Active Galactic Nuclei has been investigated by comparing various emission images.
A Fossil Feather from the Late Pleistocene Deposits in Jeiu Island, Korea
Kim, Jeong-Yul ; Kim, Kyung-Soo ; Kim, Sam-Hyang ;
Journal of the Korean earth science society, volume 27, issue 5, 2006, Pages 579~584
A fossil feather found from the Late Pleistocene sediments of Jeju Island, Korea is described. The sediments deposited in a shallow marine environment yielded numerous footprints of diverse birds and mammals including hominids. A fossil feather well-preserved as a thin white film on the light gray mudstone is part of a vaned flight one. Although the specimen is relatively small in size (10.3 mm long and 9.0 mm wide), a rachis with two flat vanes and nearly parallel curved barbs with numerous proximal and distal barbules are well preserved. The specimen represents the first record of a fossil feather from Korea and is also the first record of feather from the Pleistocene deposits in the world.