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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 26, Issue 8 - Dec 2005
Volume 26, Issue 7 - Oct 2005
Volume 26, Issue 6 - Aug 2005
Volume 26, Issue 5 - Jun 2005
Volume 26, Issue 4 - May 2005
Volume 26, Issue 3 - Apr 2005
Volume 26, Issue 2 - Mar 2005
Volume 26, Issue 1 - Feb 2005
Selecting the target year
Development of an Inquiry Analysis Framework Based on the Features of Earth Science Inquiry Methodology and the Analysis of Inquiry Activities in the 8th Grade 'Earth History and Diastrophism' Unit
Kim, Chan-Jong ; Park, In-Sun ; An, Hui-Soo ; Oh, Phil-Seok ; Kim, Dong-Young ; Park, Young-Shin ;
Journal of the Korean earth science society, volume 26, issue 8, 2005, Pages 751~758
The purpose of this study was to develop an inquiry analysis framework based on the features of earth science inquiry methodology and to analyze inquiry activities in the 8th grade 'Earth History and Diastrophism' unit by using this framework. The framework classified earth science methods as logical inference, hermeneutic, and historical methods, each of which was subdivided in consideration of its subordinate methods and characteristics. The analysis revealed that the logical inference method reflected in the unit as the 'abductive method' (70%) was used more frequently than the 'inductive' (23%) and 'deductive' (22%) methods. The hermeneutic method was found in terms of the 'forestructures of understanding' (92%), 'circular reasoning' (9%). and 'historical nature of human understanding' (17%). The historical method also used as the 'constructing proper taxonomy' (53%), 'adhering to the modem principle of uniformitarianism' (47%), and 'relic interpretation' (41%) were identified with ratios more fester than those for the 'place substituting for time in stage theorizing' (3%) and 'evaluating independent lines of inquiry for convergence' (3%).
Analysis and Evaluation of the Earth Science Content Relevance in the 7th National Science Curriculum
Lee, Yang-Rak ; Kwak, Young-Sun ; Kim, Dong-Young ;
Journal of the Korean earth science society, volume 26, issue 8, 2005, Pages 759~770
The purpose of this study is to examine the Earth science content relevance of the 7th national science curriculum. For this purpose, we (1) analyzed science curriculum or content standards of Korea, California, England and Japan, (2) compared science textbooks of Korea and Japan, (3) conducted a nationwide survey to gather opinions from students, teachers, professors and textbook authors about the relevance of the science curriculum and textbooks. According to the results, the Earth science contents of the 7th national science curriculum were not appropriate in terms of the objectives of science curriculum and the needs of students and society. The main reasons include the equal division among physics, chemistry, biology and earth science, iack of connection due to fractionation of units, overly strict application of spiral curriculum, and redundant amount of activities and concepts to cover in the textbook. Major suggestions fir securing the relevance of Earth science contents are as follows: First, the science contents and the size of units at each grade level should be determined according to the students' characteristics, not by equal portion rule. Second, the excessive overlapping and repetition of contents due to the spiral curriculum should be avoided. In addition, the number of activities should be reduced and the quality of required science activities should be improved. Third, to raise students' interest in Earth science, real-life applications and real-world Earth science contents should be emphasized including natural disasters, safety, universe and space exploration, and natural resources. Lastly, considering one of the relevance criteria is feasibility, supports for schools and science teachers are needed to realize the goal of the intended science curriculum.
The Operational Status of the 7th Elective-Centered Curriculum
Kook, Dong-Sik ; Lee, Sang-Gi ;
Journal of the Korean earth science society, volume 26, issue 8, 2005, Pages 771~776
The purpose of this study is to survey the status of the 7th elective-centered curriculum and find problems in operating the system. 485 students in the tenth and eleventh grade were randomly selected as subjects. The results are as follows. (1) Among the students, 29% of them selected their science subject without considering their future jobs, 48% did it without enough overview of the system, and 25% did without clearly understanding the details the choice centered curriculum. (2) Among the students who participated in the survey, 65% of them showed positive responses concerning the needs of individual choice centered curriculum and 96% said it increased their participation in class. However, only 39% believed that operating this type of curriculum is realistically possible. (3) 89% of students selected their science subjects accordingly with the college preparatory courses and 14% selected based on their hopes. (4) The percentage of science subjects chosen are 40% for chemistry, 25% for biology, 22% for Physics, and 13% for earth science, but 74% of students wanted to change their choices. These results showed that students recognized the object of the 7th curriculum, but selected science subjects as a means of getting into college entrances, rather than carefully considering their future and aptitude.
Elementary Students' Conceptual Changes on the Geological Stratum by Cognitive Conflict Strategy
Na, Jin-Ho ; Jung, Mee-Young ; Kyung, Jai-Bok ;
Journal of the Korean earth science society, volume 26, issue 8, 2005, Pages 777~789
Study courses using cognitive conflict strategy about geological stratum were performed on the 6th grade elementary students and their conceptual changes were investigated. Some misconceptions about geological stratum that the students have are as follows: (1) stratum was formed due to volcanic eruption, (2) gneiss composes the geological stratum, (3) folds in the stratum were formed due to vertical pressure from the top. The classes had positive effects on the changes of some the misconceptions: (1) the places where the stratum is filmed, (2) the kind of rock in the stratum, and (3) the reason for folding. However, there were no significant changes in the following items: (1) the reason that every layer consists of different sizes of grains. It shows that some misconceptions can be changed easily by cognitive conflict strategy, while others can not. We checked the students who didn't change their misconceptions after the test. These students have very strong misconceptions that most of the natural phenomena on the earth's surface are due to the internal heat pressure, and volcanic activity. Another affecting the students' misconceptions are the role of teachers in class and mass media, such as TV.
Optical Properties of Aerosol at Gongju Estimated by Ground-based Measurements Using Sky-radiometer
Kwak, Chong-Heum ; Suh, Myoung-Seok ; Kim, Maeng-Ki ; Kwak, Seo-Youn ; Lee, Tae-Hee ;
Journal of the Korean earth science society, volume 26, issue 8, 2005, Pages 790~799
We investigate the optical properties of aerosols over Gongju by an indirect method using the pound measurement, Sky-radiometer. The analysis period is from January to December, 2004. Skyrad. pack.3 is used to estimate the optical properties, such as the aerosol optical thickness (AOT), single scattering albedo (SSA),
and size distribution, of aerosols from the ground measured radiance data. And qualify control is applied to minimize the cloud-contaminated data and improve the quality of analysis results. The 12-month average of AOT,
, and SSA are 0.46, 1.14, and 0.91, respectively. The average volume spectra of aerosols shows a bi-modal distribution, the first peak at fine mode and the second peak at coarse mode. AOT and coarse particles clearly increases while SSA decreases during the Asian dust events. The optical properties of aerosols at Gongju vary with?seasons, but those are not influenced by the wind direction.
Geochemistry of the Major and Trace Elements in a Soil Profile of the Hyangdeung Area, Gwangju City, Korea
Shin, In-Hyun ; Ahn, Kun-Sang ; Kang, Jong-Hyun ;
Journal of the Korean earth science society, volume 26, issue 8, 2005, Pages 800~808
Elemental mobility during the weathering of granite in the Gwangju Hyangdeung area was investigated using ICP-MS analysis. It appeared that Al, Fe, Ti, K were lost from the profile, whereas Si, Ca, Na Mg, P and Mn were immobile during chemical weathering. In less weathered soil, large enrichment of K and Ti were found relative to Al, whereas other elements such as Si, Ca, Na, Mg and P are deplete. Fe content is constant throughout the weathered profiles. Amounts of Rb, Sr, Y, Cs, Pb, Th and U increased toward the surface. Nb, and Co have accumulated in the deepest parts of the weathered soil profile. These results agree with similar published studies. In addition, the analytical data shows that Ba and Ga increased, while Cu, Zn, Cr and Ni were relatively constant in this area. REE tend to increase in most samples, while LREEs, relative to Al, were enriched in the lower and upper saprolite. HREEs were enriched in the lower and upper saprolite.
Architectural Elements of the Fluvial Deposits of Meander Bends in Midstream of the Yeongsan River, Korea
Chung, Gong-Soo ; Lee, Jin-Young ; Yang, Dong-Yoon ; Kim, Ju-Yong ;
Journal of the Korean earth science society, volume 26, issue 8, 2005, Pages 809~820
The fluvial sequence developed along the channel margin of meander bends in the midstream of the Yeongsan River consists of channel deposits at the bottom and overbank deposits at the top, and shows a fining-upward trend. The fluvial deposits consist of 7 sedimentary facies, and facies association forms 7 architectural elements. The channel deposits formed as channel bar or point bar. The channel bar deposits consisted of architectural element of gravel bedform were formed by channel lag deposits within the channel; whereas, the channel bar deposits consisted of architectural elements of downcurrent-dipping inclined strata sets, cross-stratified and horizontally stratified sets, and horizontally stratified sets were formed by downstream migration of sand wave or downstream transport of sand by traction current in the upper flow regime conditions within the channel. The point bar deposits consist of architectural elements of down current-dipping inclined strata sets, horizontally stratified sets, cross-stratified and horizontally stratified sets, and laterally inclined and horizontally stratified sets. These architectural elements are thought to have been formed by the combined effects of the migration of sand dunes and the formation of horizontal lamination in the upper flow regime plane bed conditions. The overbank deposits consist of the architectural elements of overbank fine and sand sheet and lens. The overbank fines were formed by settling of mud from slackwater during flooding over floodplain whereas the sand sheet and lens were formed by traction of sands introduced episodically fiom channel to the overbank during flooding.
The Water Pollution of Yocheon, Uppermost Stream of the Sumjin River
Ahn, Kun-Sang ;
Journal of the Korean earth science society, volume 26, issue 8, 2005, Pages 821~827
The Yocheon is an upper stream of Sumjin river, passing through Namwon city. The water temperature of the stream increases from upper stream to downstream. The amount of COD, T-P, T-N, EC, TDS abruptly increases at measuring site 8. Whereas, the pH and DO level abruptly decreases at this site. At this point, the Yocheon river joins another small stream passing through the central part of Namwon city. At a further downstream pass site 8, the amount of COD on April and June (a dry season) is on third grade of water quality for lacustrine. This contamination suggests that sewage from the Namwon city provide COD, T-N, T-P into the stream. At point 2, the high amount of T-N indicates that the upper stream is contaminated by agricultural activity.
Paleo-red Soil on the High Fluvial Surface in the Middle Basin of Nam-Han River
Kang, Young-Pork ; Lee, Sang-Min ;
Journal of the Korean earth science society, volume 26, issue 8, 2005, Pages 828~835
The purpose of this study is to clarify the landform development of fluvial terrace and the soil characteristics occurring on the terrace deposit. In order to achieve the purpose, the characteristics of soil profiles, the physic-chemical properties of soils that are developed on terrace deposits and X-ray diffraction analysis of clay were investigated. The horizon of Al in the high fluvial surface is silt clay loam of red (2YR 4/6). The soil structure is a developed granular structure. The horizon of B1 is silt clay reddish-brown (2.5YR 4/6). The soil structure is a medium subangular blocky structure. This red soil structure is made on heavy textured and compactly packed parent materials of high terrace sediments and usually has A-B-C profile. In most cases, clay accumulations in B-horizon and clay cutans on ped surfaces are observed, which mean the formation of agrillic horizon. As the result of this study, soils derived from fluvial terrace deposits on high fluvial surfaces are considered paleo-red soil which were developed by pedogenese-strong desilicification and rubefaction and strong leaching of bases- under warmer bio-climatic condition during in the old Pleistocene period.
Bathymetric Change of a Sand Mining Site within EEZ, West Sea of Korea
Kim, Baeck-Oon ; Lee, Sang-Ho ; Yang, Jae-Sam ;
Journal of the Korean earth science society, volume 26, issue 8, 2005, Pages 836~843
Two data sets of repeated hydrographic surveys with a single beam echo-sounder were obtained to investigate morphological changes on a sand mining site within EEZ near the Eocheong Islands, West Sea of Korea. Their accuracies of depth measurement, estimated from the crossover analysis, correspond to the Oder 2 of IHO standards. Bathymetric maps show a feature of 300m wide and 10m deep hollow, whose evolution can be seen in difference grids of the two bathymetric maps. However, data of higher accuracy and resolution enable precise quantification of extracted sand volume. Since this morphological change could affect sedimentary environment as well as benthic ecology, environmental impact assessment based on scientific research data is required for management and sustainable development of limited sand resource.