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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
Analysis on the Source Characteristics of the Recent Five-year Earthquakes Occurred in the Central and Western Areas of the Korean Peninsula
Back, Jin-Ju ; Kyung, Jai-Bok ; Choi, Ho-Seon ;
Journal of the Korean earth science society, volume 32, issue 2, 2011, Pages 161~169
DOI : 10.5467/JKESS.2011.32.2.161
Focal mechanism solutions in the central and western areas of the Korean Peninsula (36-37.8
) were obtained from the analysis of the recent seventeen earthquakes (M
2.2) which occurred from January, 2005 to May, 2010. The spatial differences between the epicenters recalculated by this study and those announced by the Korea Meteorological Administration are less than
, indicating a small deviation. Focal mechanism solutions were obtained from the analysis of P wave polarities, SH wave polarities and SH/P amplitude ratios. The focal mechanism solutions show dominant strike-slip faulting or oblique slip faulting with strike-slip components. The P-axes trends are mainly ENE-WSW or E-W directions. The direction of fault plane and auxillary fault plane with NNE-SSW and WNW-ESE are almost parallel to the general trends of lineaments in the study area. The results also show that focal mechanism solutions and the main axis of stress field in the Kyonggi massif and Okchon belt are almost same.
A Biogeochemical Study of Heavy Metal Leaching from Coal Fly Ash Disposed in Yeongdong Coal-Fired Power Plant
Chung, Duk-Ho ; Cho, Kyu-Seong ; Park, Kyeong-Jin ;
Journal of the Korean earth science society, volume 32, issue 2, 2011, Pages 170~179
DOI : 10.5467/JKESS.2011.32.2.170
Fly ashes derived from coal fired power plants have unique chemical and mineralogical characteristics. The objective of this research was to study how indigenous bacteria affected heavy metal leaching in fly ash slurry during the fly ash-seawater interactions in the ash pond located in Yeongdong seashore, Korea. The in-situ pH of ash pond seawater was 6.3-8.5. For this study, three sites of the ash pond were chosen to collect a sample of fly ash slurry. Three samples that had a mix of fly ash (0.4 L) and seawater (1.6 L) were collected at each site. First sample was autoclaved (
, 2.5 atm), second one was inoculated with glucose to stimulate the microbial activity, and the last sample was kept in the natural condition. Compared with other samples including autoclaved and natural samples, the glucose added sample showed sharp increase in its alkalinity after 15 days, cation concentration change such as Ca, Mg, and K seemed to increase in early stage, and then decrease 15 days later in slurry solution of glucose added sample, and a possibly considerable decrease in
in the fly ash slurry samples when glucose was added to stimulate the microbial activity. Geochemical data of this study is likely to be related to the activity of bacteria at the ash pond. The result may be used to understand about the characteristic of bacteria.
Analytic Study on the Variation of Regional Wind Resources Associated with the Change of El Niño/La Niña Intensity
Lee, Soon-Hwan ; Lee, Hwa-Woon ; Kim, Dong-Hyuk ; Kim, Min-Jung ; Kim, Hyun-Goo ;
Journal of the Korean earth science society, volume 32, issue 2, 2011, Pages 180~189
DOI : 10.5467/JKESS.2011.32.2.180
In order to clarify the relation between El Ni
a and wind resources of the Korean Peninsula, observed meteorological data for 20 years were used in this study. Although the wind speed tends to decrease in Eurasia Continent, it gradually increases in the peninsula for 10 years. The seasonal variation of wind speed due to El Ni
a development is not so small and negative anomalies of SST tend to lead the beginning of the wind speed increase over the Korean Peninsula. Wind speed variation caused by the global scale meteorological phenomena is more sensitive in mountainous area than in any other areas because of the relatively weak mesoscale forcing at mountainous area.
Distribution of Photovoltaic Energy Including Topography Effect
Jee, Joon-Bum ; Zo, Il-Sung ; Lee, Kyu-Tae ; Choi, Young-Jean ;
Journal of the Korean earth science society, volume 32, issue 2, 2011, Pages 190~199
DOI : 10.5467/JKESS.2011.32.2.190
A photovoltaic energy map that included a topography effect on the Korean peninsula was developed using the Gangneung-Wonju National University (GWNU) solar radiation model. The satellites data (MODIS, OMI and MTSAT-1R) and output data from the Regional Data Assimilation Prediction System (RDAPS) model by the Korea Meteorological Administration (KMA) were used as input data for the GWNU model. Photovoltaic energy distributions were calculated by applying high resolution Digital Elevation Model (DEM) to the topography effect. The distributions of monthly accumulated solar energy indicated that differences caused by the topography effect are more important in winter than in summer because of the dependency on the solar altitude angle. The topography effect on photovoltaic energy is two times larger with 1 km resolution than with 4 km resolution. Therefore, an accurate calculation of the solar energy on the surface requires high-resolution topological data as well as high quality input data.
The Effects of Astronomical Animation Module on Earth Science Gifted Students`s Conceptual Change of Diurnal Motion
Cho, Kyu-Seong ; Chung, Duk-Ho ; Kim, Bo-Hee ; Park, Kyeong-Su ; Park, Kyeong-Jin ;
Journal of the Korean earth science society, volume 32, issue 2, 2011, Pages 200~211
DOI : 10.5467/JKESS.2011.32.2.200
The purpose of this study is to investigate the effects of astronomical animation module on students` conceptual change regarding the concepts of diurnal motion of stars. Four students participated in this study, who never learned about the diurnal motion of stars. An animation module was developed by using Flash MX to readily understand the concept of space. In addition, we inserted a teacher`s voice with supplementary materials into the animation module to help students learn individually. The animation module was comprised of the movement of the Earth, the Moon and the planet. The earth science gifted students` preconception on diurnal motion of stars was analyzed with pre-test using questionnaires and interviews. After the instruction with animation module, the effect of conceptual change was examined by comparing pre and post-test. The results indicated that three students correctly presented about the motion of the star by all directions in middle latitude. Four students showed their understanding that stars travelled straight in all directions. Finally, all of four students whose preconceptions were that the star rotated perpendicularly showed the conceptual change of diurnal motion that the star traveled diagonally.
Developing Web-based Virtual Geological Field Trip by Using Flash Panorama and Exploring the Ways of Utilization: A Case of Jeju Island in Korea
Kim, Gun-Woo ; Lee, Ki-Young ;
Journal of the Korean earth science society, volume 32, issue 2, 2011, Pages 212~224
DOI : 10.5467/JKESS.2011.32.2.212
In school science class, actual geological field trips tend to be restricted due to a number of problems including travel distance, cost, safety, and so on. Therefore, alternative way should be sought to provide students with the benefits of actual field trip. The purpose of this study is to develop web-based virtual field trip (VFT) about Jeju island in Korea by using flash panorama, and to explore a variety of ways to utilize the VFT. The characteristics of Jeju VFT are as follows: it provides virtual space for secondary school students to learn about volcanic topography and geology; students can access contents in a non-sequential order by virtue of web-based system, and students can control learning pace according to their ability; it is possible to investigate the same field site repeatedly, not limited by time and space; it presents differentiated worksheets for different school grade; it provides diverse complementary web contents, e. g., closeup features, thin sections, inquiry questions, and explanations of outcrops. We proposed several ways with instructional models to utilize Jeju VFT in science class and extra-school curricular as well.
Exploring Students` Ability of `Doing` Scientific Inquiry: The Case of Gifted Students in Science
Park, Young-Shin ; Jeong, Hyun-Chul ; Lee, Ki-Young ;
Journal of the Korean earth science society, volume 32, issue 2, 2011, Pages 225~238
DOI : 10.5467/JKESS.2011.32.2.225
The purpose of this study was to explore the factors that are critical for successful scientific inquiry activity in the classroom and to analyze the students` abilities of `Doing` scientific inquiry. Two hundred and forty gifted science students in grades
participated in this study and demonstrated their abilities of framing questions and designing investigation through a survey questionnaire. The survey was developed for measuring factors in terms of personal and interactive variables that are needed for `Doing` a successful scientific. Additionally, two other questionnaires were developed to measure students` abilities of framing testable questions and designing the investigation in a sequence. The results were as follows: Students` learning motivation factors as personal variable (self-confidence about group and inquiry activity, views about inquiry value) also considered as influential for students` group inquiry activity. Other four components of interactive variable (grouping, kinds of task, physical context, and teachers` role) were found to be influential in successful students` `Doing` group inquiry activity. In students` evaluation of group inquiry activity, the grouping factor was the most critical one for a successful `Doing` inquiry activity. Participating students showed some level of inability of in the process of framing inquiry question and designing investigation.
How Sensitive is the Earth Climate to a Runaway Carbon Dioxide?
Choi, Yong-Sang ;
Journal of the Korean earth science society, volume 32, issue 2, 2011, Pages 239~247
DOI : 10.5467/JKESS.2011.32.2.239
The United Nations Framework Convention on Climate Change and the corresponding national low-carbon policy should be grounded on the scientific understanding of climate sensitivity to the increase in CO2 concentration. This is, however, precluded by the fact that current estimates of the climate sensitivity highly vary. To understand the scientific background, limitations, and prospects of the climate sensitivity study, this paper reviews, as objectively as possible, the most recent results on the sensitivity issue. Theoretically, the climate sensitivity hinges on climate feedbacks from various atmospheric and surface physical processes. Especially cloud and sea-ice processes associated with shortwave radiation are known to have largest uncertainty, resulting in an inaccurate estimation of climate sensitivity. For this reason, recent observational studies using satellite data suggest sensitivity lower than or similar to those estimated by climate models (2-5 K per doubled CO2).