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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 31, Issue 7 - Dec 2010
Volume 31, Issue 6 - Oct 2010
Volume 31, Issue 5 - Sep 2010
Volume 31, Issue 4 - Aug 2010
Volume 31, Issue 3 - Jun 2010
Volume 31, Issue 2 - Apr 2010
Volume 31, Issue 1 - Feb 2010
Selecting the target year
Detecting Steel Pile Using Bore-hole 3-components Fluxgate Magnetometer
Lee, Heui-Soon ; Rim, Hyoung-Rea ; Jung, Ho-Joon ; Jung, Hyen-Key ; Yang, Jun-Mo ;
Journal of the Korean earth science society, volume 31, issue 7, 2010, Pages 673~680
DOI : 10.5467/JKESS.2010.31.7.673
A steel pile often utilized to bear heavy loads of the upper sub-structure, e. g., bridge constructions and tall buildings. As the steel piles are driven in the underground, it is not easy to detect the depth of the existing pile foundation when there is no detailed foundation information available. However, accurate informations of the depths of piles becomes critical required when reinforcing the existing structures or constructing new ones at the adjacent stage to assure the safety of existing structures. In this study, we tested the applicability of the three components borehole fluxgate magnetometer for detecting the depths and locations of steel piles which are commonly used in civil engineering. Results showed that the information of location as well as the depth of steel piles could be obtained by using data from the three components borehole fluxgate magnetometer.
Downscaling of Geophysical Data for Enhanced Resolution by Geostatistical Approach
Oh, Seok-Hoon ; Han, Seong-Mi ;
Journal of the Korean earth science society, volume 31, issue 7, 2010, Pages 681~690
DOI : 10.5467/JKESS.2010.31.7.681
Inversion result of geophysical data given as a block type was geostatistically simulated with borehole observation given as a point type and was applied to the rock classifying map. The geophysical data generally involved secondary information for the target material and were obtained for overall region. In contrast, borehole data provided direct information for the target material, but tended to be effective only for a narrow range of region and were dealt as a point type. Integrated simulation or kriging interpolation of these two different kinds of information required the covariance for point-point, point-block and block-block. Using the Bssim module included in SGeMS software, integrated result of geophysical data and borehole data were obtained. The results were then compared with the method of geostatistical inversion proposed by authors. Downscaling method used in this study showed relatively more flexible than the geostatistical inversion.
Albizia miokalkora Hu and Chaney from the Duho Formation of Yeonil Group (Miocene) in the Pohang Basin, Korea
Kim, Jong-Heon ;
Journal of the Korean earth science society, volume 31, issue 7, 2010, Pages 691~697
DOI : 10.5467/JKESS.2010.31.7.691
Three legume fossils collected from the Miocene Duho Formation of Yeonil Group in the northern Pohang Beach, Gyeongsangbug-do, Korea were described as Albizia miokalkora Hu and Chaney. This species has only appearing in the Miocene floras of Korea, China and Japan until present. It has wide distribution from warm temperate to subtropical-tropical regions but, the diversity of the species of Albizia is not so high. It is considered that the fossil Albizia miokalkora Hu and Chaney might have adapted to the warm climate such as warm temperate climate and subtropical to tropical climate.
Late Pleistocene Paleovegetation and Paleoclimate of the Uiwang Area Based on Pollen Analysis
Chung, Chull-Hwan ; Lim, Hyoun-Soo ; Yoon, Ho-Il ;
Journal of the Korean earth science society, volume 31, issue 7, 2010, Pages 698~707
DOI : 10.5467/JKESS.2010.31.7.698
The Late Pleistocene pollen record from the Poil-dong, Uiwang, Kyunggi-do, reveals that mixed coniferous and deciduous broadleaved forests were spread along with herb and fern understory. Palynofloral changes reflect climate fluctuations. From ca. 43,100 to 41,900 cal. yr BP, a mixed coniferous and deciduous broadleaved forest combined with open grassland occupied the study area, which indicates cooler condition than today. During the period of ca. 41,900-41,200 cal. yr BP, along with fern understory a decrease in subalpine conifers and an increase in temperate deciduous broadleaved trees suggest a climatic amelioration. A climatic deterioration, as evidenced by an increase in subalpine conifers and a decrease in the density of vegetation cover, occurred from ca. 41,200 to 39,700 cal. yr BP.
Seasonal Variation of Surface Sediments in the Dongho Beach, Gochang-gun, Korea
So, Kwang-Suk ; Ryang, Woo-Hun ; Kang, Sol-Ip ; Kwon, Yi-Kyun ;
Journal of the Korean earth science society, volume 31, issue 7, 2010, Pages 708~719
DOI : 10.5467/JKESS.2010.31.7.708
The Gochang-gun Dongho macro-tide pocket-type beach, located on the southwestern coast of Korea, is investigated in terms of the seasonal variations of surface sediment and sedimentary environment. Surface sediments of 45 sites in four seasons (May 2006-February 2007) are sampled across three survey lines (15 sites in each survey line). The surface sediments of the Dongho Beach are mainly composed of fine to coarse sands, and the ratio of fine sand is the largest. The average of grain size is the coarsest in the summer. The spatial distribution of surface sediments shows a coast-parallel band of fine and medium sands during three seasons of spring, fall, and winter, whereas medium sands dominated in the northern part of the study area during the summer. These results suggest that a tide is more effective than a wave in the surface sediments of the Dongho Beach during the summer.
Temporal and Spatial Distributions of Solar Radiation with Surface Pyranometer Data in South Korea
Jee, Joon-Bum ; Kim, Yeong-Do ; Lee, Won-Hak ; Lee, Kyu-Tae ;
Journal of the Korean earth science society, volume 31, issue 7, 2010, Pages 720~737
DOI : 10.5467/JKESS.2010.31.7.720
This study is to analyze the temporal and spatial distributions of solar radiation in South Korea. Solar radiation data is observed every minute at 22 KMA (Korea Meteorological Administration) stations using pyranometer from January 2000 to August 2007. These data were calibrated using intensive comparative observation and solar radiation model. Intensive comparative observations are accomplished at 22 KMA stations between KNU (Kangnung (Gangneung-Wonju) National University) standard and station instruments during the month of August 2007. The solar radiation of a clear sky mainly is affected by precipitable water, solar altitude and geological height. Also old (raw) data is corrected by the solar radiation model only about clear day and is revised based on the temporal trend of instrument's sensitivity decrease. At all periods and all stations, differences between raw data (13.31 MJ/day) and corrected data (13.75 MJ/day) are 0.44 MJ/ day. So, the spatial distribution of solar radiation is calculated with seasonal and annual mean, and is the relationship with cloud amount is analyzed. The corrected data show a better consistency with the cloud amount than the old data.
Multiple Albedo Variation Caused by the Shadow Effect of Urban Building and Its Impacts on the Urban Surface Heat Budget
Lee, Soon-Hwan ; Ahn, Ji-Suk ; Kim, Sang-Woo ; Kim, Hae-Dong ;
Journal of the Korean earth science society, volume 31, issue 7, 2010, Pages 738~748
DOI : 10.5467/JKESS.2010.31.7.738
In order to clarify the impact of variation of albedo on the atmospheric boundary layer caused by the density of building in urban areas, both satellite data analysis and numerical experiments were carried out. Utilized satellite data were multi-spectral visible data detected by the Korea Multi- Purpose Satellite -2 (KOMSAT-2), and the numerical models for the estimation of surface heat budget are Albedo Calculation Model (ACM) and Oregon State University Planetary Boundary Layer model (OSUPBL). In satellite data analysis, the estimated albedo in densely populated building area is lower than other regions by 17% at the maximum due to the shadow effect of skyscraper buildings. The surface temperature reached
in the highly dense and tall building area and
in the coarse density area of low buildings, respectively. However, the low albedo in densely integrated building area is not directly related to the increase of surface air temperature since the mechanical turbulence induced by the roughness of buildings is more critical in its impact than the decrease of albedo.
On the Relation Between Cloud-to-Ground Lightning and Rainfall During 2006 and 2007 Summer Cases
Oh, Seok-Geun ; Suh, Myoung-Seok ; Lee, Yun-Jeong ;
Journal of the Korean earth science society, volume 31, issue 7, 2010, Pages 749~761
DOI : 10.5467/JKESS.2010.31.7.749
A relationship between cloud-to-ground lightning and rainfall was investigated by using the two-years (2006-2007) summer lightning data and the automatic weather stations (AWSs) data of the Korea Meteorological Administration. The negative lightning occurred at the core of highly concentrated convection, which is often accompanied with heavy rains. Whereas most positive lightning occurred at the anvil cloud with low density and light rains. The rainfall intensity is strongest when the negative and positive lightning occurred concurrently, and one with lightning is much stronger than that without lightning. A portion of the positive lightning of the total lightning was less than 10% during summer seasons, and the lightning without rains was about 34%. The rain rate was strongly correlated with the negative flash rate, and the correlation coefficients varied between 0.87 and 0.94 according to the co-location radius (5-15 km) of AWSs. Most of the lightning occurred 10 minutes before and/or concurrently occurred with rains. A portion of the convective rainfalls of the total rainfalls was at least 20% when we define the rainfalls with lightning as convective. The convective rainfall was greater during August than in June and July. In general, the portion of convective rainfalls showed a maximum diurnal variation during late afternoon as in the rains and lightning.
Pre-service Secondary Teachers' Responses on Definitions, Illustrations, Experiments of 'Adiabatic Change' in Earth Science I Textbooks
Chae, Dong-Hyun ;
Journal of the Korean earth science society, volume 31, issue 7, 2010, Pages 762~771
DOI : 10.5467/JKESS.2010.31.7.762
The purpose of this study was to make a suggestion for the direction of writing textbook by comparing and analyzing the contents about 'Adiabatic Change' in earth science I textbooks. For this study, six textbooks were chosen among the eight government-authorized earth science I textbooks that were in general use in schools. Based on the researcher's preview of the six chosen textbooks, three categories were established as a criteria for analysis of the contents of 'adiabatic change': definitions, illustrations, and experiments. Thirty five preservice secondary teachers participated in analyzing the six textbooks based on the above three categories. Each of the six books was given an alphabet from A to F. The analysis results were as follows: Textbook A was turned out as the best textbook in the category of definition, textbook C as the best in the category of illustration, and textbook B as the best in the category of experiment about the concept of 'adiabatic change'. However, each of the six earth science textbooks showed an insufficient part in one way or the other. The results imply that the inaccurate and inappropriate information would not only make the students difficult to understand the adiabatic change but also lead them to some level of misconceptions. Therefore, there need to reconstruct the contents of textbooks to be more systematic, accurate, and complete.
Exploring the Student Presenters' and Student Visitors' Perceptions of the Science Festival
Park, Eun-Ji ; Lee, Sun-Kyung ; Kim, Ki-Sang ; Kim, Chan-Jong ;
Journal of the Korean earth science society, volume 31, issue 7, 2010, Pages 772~784
DOI : 10.5467/JKESS.2010.31.7.772
'Science festival' is an annual public event featuring a variety of science- and technology-related workshops and live demonstrations of experiments by student presenters. This study was to explore the student presenters' and student visitors' perceptions of the science festival. The subjects were 323 student presenters who managed laboratory booths and 495 student visitors who attended the festival for six days. We developed a questionnaire based on the modified items of ones both from Ahn & Park (2009) and Lee et al. (2010). Data included students' participation backgrounds, differences of their perceptions about the educational effects according to participation types and school levels, and student presenters' perceptions of scientific inquiry that they had through the preparation of the festival. Findings suggested that student presenters perceived their experience of preparing for the festival as meaningful scientific inquiry process such as asking and solving problems. Based on the results, discussion and implications for communitybased programs as an informal science education were presented.
Understanding of the Linguistic Features of Earth Science Treatises: Register Analysis Approach
Maeng, Seung-Ho ; Shin, Myung-Hwan ; Cha, Hyun-Jung ; Ham, Seok-Jin ; Shin, Hyeon-Jeong ; Kim, Chan-Jong ;
Journal of the Korean earth science society, volume 31, issue 7, 2010, Pages 785~797
DOI : 10.5467/JKESS.2010.31.7.785
This study identified the linguistic features of Earth science treatises through the analysis of the register. Data included three Korean treatises that were in geology, atmospheric science, and oceanography. The register of Earth science treatise was as follows: First, there were semantic, referential connections between Themes and Rhemes, that the messages and main points of the texts were expressed coherently and cohesively. Second, some predicates were used which were related to deductive inference, abductive inferences, or causal relation according to the genre elements of each text. The logical relations were not represented by the conjunctions but by the types of predicates. Third, most texts in the treatises showed interpersonally weak relationship using mental predicates related to possibilities, which meant scientists expressed indirectly their interpretation, explanation, or arguments. From these results, we argued that some activities of unpacking the language of science be included in science curriculum in order to improve students' literacy of science texts and understanding scientists' knowledge construction.
Secondary Beginning Teachers' Views of Scientific Inquiry: With the View of Hands-on, Minds-on, and Hearts-on
Park, Young-Shin ;
Journal of the Korean earth science society, volume 31, issue 7, 2010, Pages 798~812
DOI : 10.5467/JKESS.2010.31.7.798
The purpose of this study was to investigate beginning teachers' views of scientific inquiry envisioned in science education reform, which is the main goal of science education at schools. Teachers' views about scientific inquiry influence their students' learning in the classroom, so it is significant to investigate teachers' views about the scientific inquiry. 126 beginning science teachers participated in this study. The survey asking teachers' view of general scientific inquiry, nature of science (NOS) and the relationship of science, technology, and society (STS), was developed and implemented for 30 minutes. Alternative views of scientific inquiry including NOS and STS were emerged through data analysis with open coding system. The reliability and validity of data collection and data analysis were constructed through the discussion with experts in science education. The results of this study were as follows. Participants defined scientific inquiry as opportunities of 'Hands-On' and 'Minds-On' or its combination rather than 'Hearts-On'. However, teachers demonstrated the view of 'Hands-On' for the purpose of scientific inquiry and for teachers' roles in its implementation. The view of 'Hearts-On' about scientific inquiry was not identified. The naive view of NOS were identified more than informative one. More positive attitude about the relationship of STS was released. The implication was made in teacher education, especially structured induction program for beginning teachers.
Exploring the Alternative to Discrepant Terms in Earth Science I·II Textbooks
Choe, Seung-Urn ; Ham, Dong-Cheol ; Yu, Hee-Won ;
Journal of the Korean earth science society, volume 31, issue 7, 2010, Pages 813~826
DOI : 10.5467/JKESS.2010.31.7.813
The purpose of this study is to investigate discrepant Earth Science terms in high school curriculums and to explore the alternative to those terms. In this study, we defined discrepant terms as different terms which had the same meaning in Earth Science textbooks. Discrepant terms were compared with terms in references and precedent studies, and the preference by 284 of teachers and students was investigated. The results of this study are as follows: A number of discrepant terms were found in references as well as high school textbooks. Participants preferred terms that are more understandable, were learned previously, and were correct to loanword orthography. As for the cases of discrepant terms caused by different notation of proper nouns or different references and background knowledge, the alternative could be explored by the rule of loanword orthography or the journal publications. In conclusion, confusion may be reduced by utilizing common terms that are both based on authorized theory and easy to convey the meaning.
The Conceptions of Astronomical Distance of Elementary School Teachers
Jeong, Jin-Woo ; Han, Shin ;
Journal of the Korean earth science society, volume 31, issue 7, 2010, Pages 827~838
DOI : 10.5467/JKESS.2010.31.7.827
The purpose of this study is to identify the conceptions of elementary school teachers regarding the variation scale about astronomical distance and its accuracy with distance increased. The astronomical distance questionnaire was administered to 69 elementary school teachers, then; three teachers were selected to interview about their conceptions. Results showed that many elementary school teachers overestimated the distance from the Earth to the Moon and to the Sun, and dramatically underestimated the distances to the nearest star and to the nearest galaxy. They inferred astronomical distance with the use of both intuitive (psychological) measure and theoretical (calculative) measure. They well recited the terminology such as AU and a light-year, yet they did not show a good understanding of what the terms exactly means. Some teachers thought that the distance to Neptune is farther than the distance from Earth to the nearest star. There was a considerable variability in the participants' estimates of astronomical distances. Elementary school teachers showed a tendency to overestimate the distance as it gradually increases to the outer solar system.