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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 32, Issue 7 - Dec 2011
Volume 32, Issue 6 - Oct 2011
Volume 32, Issue 5 - Sep 2011
Volume 32, Issue 4 - Aug 2011
Volume 32, Issue 3 - Jun 2011
Volume 32, Issue 2 - Apr 2011
Volume 32, Issue 1 - Feb 2011
Selecting the target year
A Model Test of IE and IR Method to Detect the Cavity Underneath the Concrete Structure
Noh, Myung-Gun ; Oh, Seok-Hoon ;
Journal of the Korean earth science society, volume 32, issue 1, 2011, Pages 1~11
DOI : 10.5467/JKESS.2011.32.1.1
The impact echo and impulse response methods were applied to the safety inspection of concrete structure, which has the rear cavity. The concrete structure model used in this study was divided into four sections, pure concrete, concrete+cavity, reinforced concrete with iron bar, and reinforced concrete+cavity, respectively. Previous study performed by authors have showed a possibility of success to use these method for detection of the rear cavity of concrete structure. Therefore, we tried to get more enhanced result with IE and IR methods through this study. Especially, IE and IR methods are relatively accurate to map the point of measurement, which makes it possible to interpret the depth of the concrete bed and effect by rear cavity with confidence. Followings were revealed from the results; the IE method shows some small peak zones probably indicating the rear cavity in the frequency lower than the resonance frequency and the changes of mobility and dynamic stiffness in the IR method indicate the weak zones. The proposed methods can be used to delineate the weak zones of the concrete structure.
A Study on the Gravity Anomaly of Okcheon Group based on the Gravity Measurement around Chung Lake
Park, Jong-Oh ; Song, Moo-Young ;
Journal of the Korean earth science society, volume 32, issue 1, 2011, Pages 12~20
DOI : 10.5467/JKESS.2011.32.1.12
The gravity measurement was conducted at 256 stations around Chungju Lake to study subsurface geological distributions and subterranean mass discontinuities by the results of gravity anomaly in Metamorphic Complex, Okcheon Group, Great Limestone Group of Choson Supergroup, and Cretaceous biotite granites. Okcheon Group showed a high Bouguer gravity anomaly while Great Limestone Group of Choson Supergroup relatively a low anomaly. The mean depth of subterranean mass discontinuities is about 2.0 km and downward along the Suchangri Formation from the Hwanggangri and Moonjuri formations. In general, Okcheon Group appeared shallower than the depth of Great Limestone Group of Choson Supergroup when imaging the subterranean mass discontinuities from the Bouguer gravity anomaly.
Validation of MODIS-derived Aerosol Optical Thickness Using SKYNET Measurements over East Asia
Jang, Hyun-Sung ; Song, Hwan-Jin ; Chun, Hyoung-Wook ; Sohn, Byung-Ju ; Takamura, Tamio ;
Journal of the Korean earth science society, volume 32, issue 1, 2011, Pages 21~32
DOI : 10.5467/JKESS.2011.32.1.21
Using six-year (2004-2009) SKYNET measurements, MODIS-derived AOTs were validated at five SKYNET sites (Seoul, Chiba, Etchujima, Fukuejima, and Hedomisaki), in addition to climatological analysis of MODIS-derived optical properties over the East Asian domain (
). In so doing MODIS-SKYNET collocated AOT data were constructed if two measurements are taken within 25 km distance and within 30 minute time difference. From the comparison of two measurements, it is demonstrated that aerosol type insignificantly affects the accuracy of MODIS AOT. It is because the aerosol model combining predefined fine aerosol model and coarse aerosol model is used for the retrieval. However, positive bias between MODIS and SKYNET increases as fraction of the coarse aerosol model increases. In addition, MODIS AOT appears to be overestimated in case of lower aerosol loading while the overestimation tends to decrease with increased aerosol loading. Regression analysis between MODIS AOT and SKYNET AOT for 550 nm band yields 0.86, 0.16, and 0.61 of regression slope, intercept, and coefficient of determination, respectively. Those statistical results may draw a conclusion that MODIS AOTs over East Asia carry a reasonable accuracy compared to ground-based SKYNET measurements.
Characteristics of Summer Rainfall over East Asia as Observed by TRMM PR
Seo, Eun-Kyoung ;
Journal of the Korean earth science society, volume 32, issue 1, 2011, Pages 33~45
DOI : 10.5467/JKESS.2011.32.1.33
The characteristics and vertical structure of the rainfall are examined in terms of rain types using TRMM (Tropical Rainfall Measuring Mission) PR (Precipitation Radar) data during the JJA period of 2002-2006 over three different regions; midlatitude region around the Korean Peninsula (EA1), subtropical East Asia (EA2), and tropical East Asia (EA3). The convective rain fraction in the EA1 region is 12.2%, which is smaller by 6% than those in the EA2 and EA3 regions. EA1 shows less frequent convective rain events, which are about 0.5 times as many as those in EA3. EA1 produces the mean convective rain rate of 10.4 mm/h that is about 40% larger than EA2 and EA3 while all regions have similar mean stratiform rain rate. The relationships between storm height and rain rate indicate that the rain rate is proportional to the storm height. Based on the vertical structure of radar reflectivity, EA1 produces deeper and stronger convective clouds with higher rain rate compared to the other regions. In EA3, radar reflectivity increases distinctly toward the land surface at altitude below 5 km, indicating more dominant coalescence-collision processes than the other regions. Furthermore, the bright band of stratiform rain clouds in EA3 is very distinct. In convective rain clouds, the first EOFs of radar reflectivity profiles are similar among the three regions, while the second EOFs are slightly different. The larger variability exists at upper layers for EA1 while it exits at lower levels for EA3.
A Numerical Study on the Characteristics of High Resolution Wind Resource in Mountainous Areas Using Computational Fluid Dynamic Analysis
Lee, Soon-Hwan ;
Journal of the Korean earth science society, volume 32, issue 1, 2011, Pages 46~56
DOI : 10.5467/JKESS.2011.32.1.46
The purpose of this paper is to evaluate the wind energy resources with high spatial resolution in Sunghak and Guduck mountains in Busan Metropolitan area under the various atmospheric stabilities. The numerical model used in this research is A2C (Atmosphere to CFD), mainly applied to assess the regional scale and microscale meteorological phenformin. Wind under the strong atmospheric stability moves around mountain side smoothly due to the strong potential energy. On the other hand, the cavity region on the lee side of mountain tends to be created and expanded as the atmospheric stability decrease. Annually the average distribution of wind power density, turbulence kinetic energy, and vertical wind shear help to explain quantitatively that wind resource near the northern side of Guduck mountain top is more suitable to establish wind energy complex than that in any other regions in the target area.
Development and Dissemination of the Teaching Materials for the Creative Activity in Geoscience Area: The Case of the KIGAM's Creative Geo Educamp
Cho, Hyun-Jun ; Kim, Jong-Rang ;
Journal of the Korean earth science society, volume 32, issue 1, 2011, Pages 57~72
DOI : 10.5467/JKESS.2011.32.1.57
The purpose of this study is to identify the effects of Creative Geo Educamp-the thematic trips with geoscientist, donation of KIGAM's intellectual properties. It was carried out twice and each time took professional development programs for 16 hours. There were 35 secondary science teachers (2010. 7.6.-8.) and 31 elementary teachers (2010. 7.20.-22.). This program was designed to contribute the public education by using intellectual properties of KIGAM. Textbooks and kits were developed for the creative activities according to 2009 Curriculum Revision and they were donated as educational materials. The survey showed that the participants have a high satisfaction of the textbooks and kits developed. Its figures are 4.45 of secondary science teachers and 4.8 of elementary teachers out of 5 points.
Assisting High School Students to Redefine the Principle of Coriolis Force
Jang, Swung-Hwan ; Park, Hyo-Jin ; Cho, Kyu-Seong ; Moon, Byung-Kwon ;
Journal of the Korean earth science society, volume 32, issue 1, 2011, Pages 73~83
DOI : 10.5467/JKESS.2011.32.1.73
A new method was developed to better understand the principle of Coriolis force. We also investigated the understanding of 5 10th grade students and analyzed their responses. Since no clear explanation about the nature of a rotating disk is provided in school textbooks, it tends to be misunderstood as the earth surface revolving on its axis pointing to the North Pole. This study was carried out focusing on the fact that a rotating disk is the tangential plane at arbitrary latitude. Results showed that there are changes in students' conceptions on the principle of Coriolis force with a new understanding of the rotating disk. In conclusion, a new method used in this study helped students better understand the link between Coriolis force and rotating disk. The method would be helpful to clarify the principle of Coriolis force in school science.
Linguistic Characteristics of Middle School Students' Writing on Earth Science Themes Through Analysis of Its Genre and Register
Cha, Hyun-Jung ; Kim, Chan-Jong ; Maeng, Seung-Ho ;
Journal of the Korean earth science society, volume 32, issue 1, 2011, Pages 84~98
DOI : 10.5467/JKESS.2011.32.1.84
The study investigated the linguistic characteristics of middle school students' writing on the themes of earth science through analysis of its genre and register. Data for analysis included
grade students' writings about 'global warming' and 'classification of rocks'. The results of this study include: First, many students were not accustomed to writing in genre, especially exposition genre. Second, in terms of ideational meaning, the material verbs representing action or doing were more dominant than relational verbs that are related to the attribute or definition of things, and additional logical relations were predominant. Third, regarding interpersonal meaning, agents, emotions, subjective opinions appeared in the writings and students did not express their ideas conclusively and revealed feelings of doubt and uncertainty about their knowledge. Fourth, as for textual meaning, most students listed fragments of information using additional conjunctions in simple structures and were not accustomed to writing texts with organizing structures, logical patterns, cohesion, and coherence. From these results, we argued that the scientific writings should be emphasized in science learning that aims to foster scientific literacy. In addition, we discussed the necessity of improving science teachers' perceptions on scientific writing as well as setting up a specific plan in the national curriculum.
Development and Application of Three Dimensional Framework for Analyzing the History of Science Content in Science Textbook: Focus on the History of Earth Science
Park, Se-Ki ; Lee, Ki-Young ; Lee, Myon-U ;
Journal of the Korean earth science society, volume 32, issue 1, 2011, Pages 99~112
DOI : 10.5467/JKESS.2011.32.1.99
History of science (HOS, hereafter) has been considered as a useful tool for achieving a variety of objectives in science lesson. The purpose of this study was to develop three dimensional framework for effectively analyzing HOS content in science textbook. In addition, using this framework, we analyzed HOS content in science textbooks of the 7th curriculum by focusing on the history of Earth science. Developed framework consists of three dimensions; instruction context, role, and type. Each dimension has several sub-domains. The results of textbook analysis revealed that science textbook didn't include diverse HOS materials that are appropriate to three dimensions and its sub-domains of the framework. Based on the results, we proposed that three dimensional framework is an effective tool to develop materials for teaching and learning materials of HOS with multiple coordinations of various contexts and purposes.
Petrological Investigation of the Specimens in School Rock Gardens in Jeonju, Korea
Cho, Kyu-Seong ;
Journal of the Korean earth science society, volume 32, issue 1, 2011, Pages 113~123
DOI : 10.5467/JKESS.2011.32.1.113
The effective teaching of Earth Science in the classroom should be augmented by field studies of rocks and minerals in a competently designed school rock garden(SRG). The displayed specimens must be correctly identified, labeled and esthetically evaluated. SRG is more than a general garden with just landscaping and it should provide students with freedom of conducting independent inquiries. The composition of the selected specimens should be representative of the bedrocks of region as well as of Korea in general. There are 130 schools in Jeonju-city and 35 (26.9%) have established rock gardens. There is a pressing demand for more gardens and number of display samples in school. The existing displays need improvement because some samples are not correctly identified and labeled. In addition, there is a duplication of rock types as well as lack of important rock types. The number and composition of the displayed rocks and minerals should be related to the school curriculum and reflect representative bedrocks of Jeonju-city and region.
Exploring Epistemological Features Presented in Texts of Exhibit Panels in the Science Museum
Lee, Sun-Kyung ; Shin, Myeong-Kyeong ; Lee, Gyu-Ho ; Choi, Chui-Im ; Baek, Doo-Sung ; Chung, Kwang-Hoon ; Yu, Man-Sun ; Kim, Sun-Ja ; Son, Sung-Keun ; Choi, Hyun-Sook ; Lee, Kang-Hwan ; Lee, Jeong-Gu ;
Journal of the Korean earth science society, volume 32, issue 1, 2011, Pages 124~139
DOI : 10.5467/JKESS.2011.32.1.124
This study was to explore epistemological features presented in texts of exhibit panels in the science museum located in Gyeonggi Province. Out-of-school or daily experiences allow more properly and potentially students to form informative science image, because the understandings of scientific epistemology were constructed tacitly through various experiences over a long period of time. The target for this study was panel texts of exhibits in a science museum as an of out-of-school context. The analytical framework was adopted from epistemological frameworks by Ryder et al. (1999). The research results were explored in the categories of relationship between scientific knowledge claims and the data, the nature of lines of scientific enquiry, and social dimension of science. It revealed that one exhibit might reflect the characteristics of one epistemological position: relating one data to one knowledge claim; generating knowledge claim from scientists' individual interests or from discipline's internal epistemology; scientists working as a community or an institution. Findings suggested that the exhibits of a science museum including panel texts and medium need to reflect the wide ranges of scientific epistemology.
The Effects of Prior Knowledge and Development Procedure to Teaching Materials Developed by the Pre-service Earth Science Teachers-Focused on the Teaching Materials in the Schoolyard
Chung, Duk-Ho ;
Journal of the Korean earth science society, volume 32, issue 1, 2011, Pages 140~151
DOI : 10.5467/JKESS.2011.32.1.140
This study is to search the problems of schoolyard teaching material developed by pre-service earth science teachers and the critical factors affecting material making. The 258 schoolyard teaching materials was collected from 54 pre-service earth science teachers (male: 18, female: 36) major in Earth Science Education in Jeonju, Korea. The schoolyard teaching materials was greatly influenced by making process type of it and the prior knowledge of pre-service earth science teachers. As schoolyard preference exploratory type rely on their prior knowledge to develop the schoolyard teaching materials, they made use of the limited concepts like fault in material making. But the concept preference exploratory type made use of concepts not accessible to majority of pre-service earth science teachers because they selected a concept from the earth science textbook first of all. The pre-service earth science teachers having wrong prior knowledge selected inappropriate resources, as well as fell into the error of concept connecting. The pre-service earth science teachers having right prior knowledge partly considered only shape of resources, but had a disregard for formation process of it in material making. Accordingly, we need to reflect richly Geological Field Trip and Solid Earth Science to curriculum for earth science teacher education. And we have to educate pre-service earth science teachers to create holistic concept on the geological subject matter knowledge, field based teaching and learning strategy, material making process.
Low Frequency Lg Attenuation Coefficient around the Korean Peninsula
Chung, Tae-Woong ; Chung, Kyung-Hoon ;
Journal of the Korean earth science society, volume 32, issue 1, 2011, Pages 152~157
DOI : 10.5467/JKESS.2011.32.1.152
Lg amplitude decrease
becomes very important when harzadous earthquakes occurred in neighbor nations such as Japan and China because the Lg phase is the largest seismic phase in Korea. The values of Lg
are correlated with seismic activities from the RTSM for IRIS data with long pair distance of stations and events. The Japanese paths crossing the East Sea (Sea of Japan) show high
values related with seismicity and oceanic crust. The paths of Shanghai having the moderate seismicity show the second highest values followed by the Japanese region, while the paths between Manchuria and the Korean Peninsula exhibit low values associated with the low seismicity of the regions.