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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 24, Issue 8 - Dec 2003
Volume 24, Issue 7 - Dec 2003
Volume 24, Issue 6 - Oct 2003
Volume 24, Issue 5 - Aug 2003
Volume 24, Issue 4 - Jun 2003
Volume 24, Issue 3 - Apr 2003
Volume 24, Issue 2 - Feb 2003
Volume 24, Issue 1 - Jan 2003
Selecting the target year
The Effects of Utilizing Concept Maps on Elementary Students' Achievement and Attitudes toward Concept Maps in Rock-related Unit
Wee, Soo-Meen ; Jang, Myoung-Duk ; Jeong, Jin-Woo ; Jung, Jae-Gu ;
Journal of the Korean earth science society, volume 24, issue 5, 2003, Pages 371~377
The purpose of this study is to examine the effects of utilizing concept maps in a rock-related unit. To do this, two groups composed of 73 sixth grade students engaged in this study. One group (experimental group) participated in utilizing concept maps in the unit, the other (control group) took part in traditional instruction in the same unit. The results of this study are as follows, after seventeen sessions: First, the achievement between the two groups showed significant difference. It indicates that utilizing concept maps as an instructional method is effective. Second, in the examination of the experimental group's attitudes toward concept maps, the students showed more affirmative responses on cognitive items than on affective items. Third, the students showed that they have difficulty in the method and the procedure of drawing up the concept maps. It indicates that the method and the procedure are sufficiently learned before instruction begins.
An Analysis of Teachers' Level of Usage and Concern Over the 7th Science Curriculum
Lee, Yong-Seob ; An, Hyun-Hee ; Kim, Sang-Dal ; Kim, Jong-Hee ;
Journal of the Korean earth science society, volume 24, issue 5, 2003, Pages 378~392
The purpose of this study is to investigate the depth of earth science teachers' concern over the 7th Science Curriculum and levels of their use of it in reality, using the tools "Concern" and "Levels of use" which are two important tools use in CBAM. The results of the study are as follows. How much concern do the earth science teachers have over the 7th Science Curriculum? There are seven stages (from 0 stage to 6 stage) of teachers' concern over the curriculum. o stage represents teachers' indifference to the curriculum and 98% teachers are placed in this stage. According to the study on teachers' teaching experience, teachers having from 10 to 14 years of teaching experience are the most indifferent to the 7th Science Curriculum, compared to other teachers. Which levels of use of the 7th science curriculum do earth science teachers choose in reality? There are five levels of use (from 1 to 5) of the 7th curriculum. 43.97% of teachers are placed in the 3rd level called "Mechanical level", which represents a teacher-concerned learning method with consideration of learners' response. According to the study on teachers' frequency of level of use in the fields of "Instruction objects, Instruction contents, Instruction methods, Instruction materials and Evaluation.", teachers chose high levels of use in the fields of "Instruction objects and Instruction contents" and low levels of use in the other three fields. What factors are barriers for earth science teachers to perform the 7th Science Curriculum in reality? 80.9% of teachers have trouble performing the 7th Science Curriculum in reality because of too much routine work, official papers, and lack of instructional materials, laboratories, training systems and workshops. The two biggest barriers among the above are routine work and of official papers. According to the study on teachers' teaching experience, teachers having from 0 to years of teaching experience have the most trouble in performing the curriculum in reality, compared to other teachers.
The Effect of Using Analogies in High School Earth Science Classes
Kim, Sang-Dal ; Kim, Jong-Hee ; Lee, Ji-Eun ;
Journal of the Korean earth science society, volume 24, issue 5, 2003, Pages 393~401
The purpose of this study is to research the effect of using analogies in high school earth science classes. According to the usage of TWA model, three types of teaching strategies were developed: text developer-generated, teacher-generated, and student-generated analogies. The model described in this paper began with a task analysis of highschool science textbooks for grade 10 to identify how the textbook authors used analogies to explain plate tectonics concepts. In this study, 210 students were sampled from first graders of high school. After 7 classes, the consciousness of students was investigated with questionnaires. The results are as follows: 1. Many plate-tectonics analogies are used in high school science textbooks (total 25). Teachers and authors construct effective analogies to help students build on their relevant knowledge by applying it to new knowledge acquired from textbooks. 2. Analysis of the data indicate that instruction using student-generated analogies was more effective than others. But in the class in conveying complicated concepts (ex. transform fault), teacher-generated instruction was effective. Teachers need to be aware of the weakness of using analogies in order to select the most appropriate analogies. 3. Making analogies in general, as well as using analogies have systematic steps. Analogies should be used after considering student's preconception, teacher's consciousness and text author's intention to use analogies as powerful instructional tools.
Color Change by Microstructure and Chemical Composition of Bivalve Fossils
Yun, Cheol-Soo ;
Journal of the Korean earth science society, volume 24, issue 5, 2003, Pages 402~410
When the bivalve fossil microstructure is observed on a thin section, the growth lines of the older specimens are mostly erased by calcite recrystallization while those of the younger are well preserved in detail. During the fossil diagenesis, the shells tend to darken gradually since the valve-forming component Ca
is the replaced by the surrounding materials Fe
, and Mn
. Therefore, the metallic ratio against Ca component in fossil was increased during diagenesis. The UV-Visible spectrophotometry analysis shows that the reflecting degree is low level in Cretaceous bivalve fossils in contrast to the Tertiary and Recent ones. This result suggests that the dark color in older bivalve fossils is affected by the replacement of the metal ions.
Development of Road traffic Air Diffusion Simulation System using Graphic User Interface (GUI)
Lee, Hwa-Woon ; Oh, Eun-Joo ;
Journal of the Korean earth science society, volume 24, issue 5, 2003, Pages 411~419
The assessment of environmental impact on NO
(or TSP) emitted by vehicles is important for local residents from the point of view of their health and environmental protection. In the course of field investigations, correct concentrations are measured and meteorological data are observed for numerical simulation. To determine background concentration for numerical simulation, annual average concentrations of NO
(or TSP) are estimated using the Puff-Plume model. If the estimated result affects the environment, it must be considered in the environmental conservation activity. To make the process of a estimation of environmental assessment more easily, this system is developed. Moreover, this system was supplied a Graphic User Interface (GH) for the user who calculated the concentration of air pollution exhausted from the traffic on general roads except special roads such as interchanges and entrances to tunnels. This system can offer not only the numerical result but also a graphic display. Even a beginner who is not a professional programmer can calculate the result easily.
Atmospheric Chemistry of Mercury in the Polar Regions and its Environmental Implications
Schroeder, WH ; Kim, Min-Young ; Hong, Sung-Min ; Shon, Zang-Ho ; Kim, Ki-Hyun ;
Journal of the Korean earth science society, volume 24, issue 5, 2003, Pages 420~427
The results of recent studies indicate that atmospheric distribution of Hg in the arctic environment is unique enough to show strong depletion during spring followed by notable increases during summer. The observations of this abnormal trend contrast quite sharply with what had been recognized as Hg geochemical behavior in air over the past decades. Using the long-term measurement data of Hg obtained from both the Arctic and Korea, we attempted to provide valuable insights into the unique mercury depletion phenomenon (MDP) in the polar regions of the globe.
Application of Spatial Data Integration Based on the Likelihood Ratio Function nad Bayesian Rule for Landslide Hazard Mapping
Chi, Kwang-Hoon ; Chung, Chang-Jo F. ; Kwon, Byung-Doo ; Park, No-Wook ;
Journal of the Korean earth science society, volume 24, issue 5, 2003, Pages 428~439
Landslides, as a geological hazard, have caused extensive damage to property and sometimes result in loss of life. Thus, it is necessary to assess vulnerable areas for future possible landslides in order to mitigate the damage they cause. For this purpose, spatial data integration has been developed and applied to landslide hazard mapping. Among various models, this paper investigates and discusses the effectiveness of the Bayesian spatial data integration approach to landslide hazard mapping. In this study, several data sets related to landslide occurrences in Jangheung, Korea were constructed using GIS and then digitally represented using the likelihood ratio function. By computing the likelihood ratio, we obtained quantitative relationships between input data and landslide occurrences. The likelihood ratio functions were combined using the Bayesian combination rule. In order for predicted results to provide meaningful interpretations with respect to future landslides, we carried out validation based on the spatial partitioning of the landslide distribution. As a result, the Bayesian approach based on a likelihood ratio function can effectively integrate various spatial data for landslide hazard mapping, and it is expected that some suggestions in this study will be helpful to further applications including integration and interpretation stages in order to obtain a decision-support layer.
The 3-D Geomagnetic Induction Modeling and the Application of Difference Arrow Considering with Conductivity Structures on the Korean Peninsula
Oh, Seok-Hoon ; Lee, Duk-Kee ; Kwon, Byung-Doo ; Youn, Yong-Hoon ; Yang, Jun-Mo ;
Journal of the Korean earth science society, volume 24, issue 5, 2003, Pages 440~448
We have performed 3-D geomagnetic induction Modeling considering with anomalous conductive structures to interpret the conductive anomaly proposed by previous studies on the Korean Peninsula. The results of modeling coincide well with the observed induction arrow. we confirm the fact that Imjin River Belt and Ogcheon Belt presumed in the model are reasonable. In the western-middle area of the peninsula (YIN, ICHN) the induction arrows seem to reflect the existence for the Imjin River Belt and the induction arrows in western-south area (HNS, CHY, DZN, MWN) is likely to reflect the effect of the Ogcheon Belt. The difference arrows, calculated by subtracting the sea effect from observed induction arrow in the western area of the peninsula at the period of 60-minutes, show little difference with the observed induction arrows. Especially, the difference arrows in YIN, ICHN also show a similar pattern to those at the periods longer than 10-minutes. These results strongly suggest that the Imjin River Belt and the Ogcheon Belt extend down to the deep part of the crust in spite of the limitation of our model.
An Analysis of Climatic Elements around the Pohang area
Jung, Woo-Sik ; Kim, Hyun-Goo ; Lee, Soon-Hwan ; Lee, Hwa-Woon ;
Journal of the Korean earth science society, volume 24, issue 5, 2003, Pages 449~455
Climatic elements were investigated in order to understand the atmospheric environment around the Pohang area and for use as basic information in prediction. In this analysis, we could find that the annual mean temperature, relative humidity, and precipitation are 14.39
, 63.3%, and 1.178mm, respectively. The prevailing wind direction was southwestern, and the mean wind speed is 2.7m/s. The amount of cloud was abundant during the summer because of the Jang-ma phenomenon and convective clouds induced by terrain effect. The annual mean duration of sunshine represented about 2,221 hours.
Development of Remote Control System for KNUO 16
Kim, Chil-Young ; Chung, Jung-In ; Kim, Jong-Hun ; Kim, Hyouk ; Jang, Bi-Ho ; Kim, Hee-Soo ;
Journal of the Korean earth science society, volume 24, issue 5, 2003, Pages 456~466
We developed a remote control system for the 16" reflecting telescope at KNUO (Kongiu National University Observatory). This system is a close loop system. The electronic control part used TCS-196 of the Korea Astronomy Observatory, the mechanical part was developed directly in this research. The pointing accuracy of this system was
50" in the hour angle direction,
40" in the declination direction after mount modeling. The tracking accuracy was about 1"/min. This pilot test result means that this system is suitable for research or education of astronomical fields.
Absolute Sonar Position on Side Scan Sonar Data Processing
Lee, Yong-Kuk ; Park, Gun-Tae ; Suk, Bong-Chool ; Jung, Baek-Hun ; Kim, Seong-Ryul ;
Journal of the Korean earth science society, volume 24, issue 5, 2003, Pages 467~476
For the seafloor acoustic image mapping of side scan sonar, the beginning step of the procedure is to fix the absolute sonar (tow-fish) position since the sonar is not hull mounted but towed astern. The technical algorithm used to calculate the actual sonar position without any other additional sub-system, i.e., the underwater acoustic position tracking system or the sonar attitude measuring device, was proposed. In the seafloor image mosaic mapping results using the sonar track (not ship track) developed in this study, any ambiguity or inconsistency of seafloor features was not found. The incidental effect from the sonar position determination procedure orients the towing direction of sonar to be smooth, consequently the swath pattern on the across-track direction becomes stable and the blanking phenomenon of the insonification area is reduced conspicuously. This technical method is considered to be an useful tool when applied toother underwater towing vehicle surveys.
Spatial Variability and Contents of Metals in the Surficial Sediments of Youngil Bay, East Coast of Korea
Um, I.K. ; Lee, M.K. ; Jeon, S.K. ; Jung, H.S ; Lim, D.I. ;
Journal of the Korean earth science society, volume 24, issue 5, 2003, Pages 477~490
Bottom sediments from Youngil Bay, East Coast of Korea, were analyzed for grain composition as well as elemental compositions and total organic carbon (TOC) content in order to investigate the spatial variability and content of metal elements. Grain size distribution of the sediments seems to be controlled by anticlockwise current pattern with bottom topography of the study area. Spatial variability of TOC and all elemental contents reflects those of grain size, but an exception was found in the harbor area (Old-Port): their contents are high in the central part of the bay with the muddy sediment and decrease toward the sand-dominated coastal zone. However, contents of Ca, Sr, K are high in the sand-dominated coastal zone and contents of some heavy metals (Cd, Cu, Zn) are high in the Old-Port area and the mouth of Hyeongsan River. The correlation matrix and R-mode factor analyses reveal that four important factors controlling the distribution of metals in the bay are sediment grain size (or quartz dilution effect), the formation of sulfide minerals associated with decomposition of organic matters under anoxic geochemical environment, calcium carbonate (mainly shell fragments) and coarse-grained feldspar mineral. According to the metal content of labile fraction an CER (concentration enrichment ratio) value, high accumulation of some heavy metals in the harbor area seems to result not formed by early diagenetic processes under anoxic environment.
Journal of the Korean earth science society, volume 24, issue 5, 2003, Pages 491~491