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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
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Volume & Issues
Volume 28, Issue 7 - Dec 2007
Volume 28, Issue 6 - Oct 2007
Volume 28, Issue 5 - Sep 2007
Volume 28, Issue 4 - Aug 2007
Volume 28, Issue 3 - Jun 2007
Volume 28, Issue 2 - Apr 2007
Volume 28, Issue 1 - Feb 2007
Selecting the target year
Development and Application of Teaching Aids for Geological Fieldwork Based on Chaeseokgang Area, Buan-gun, Jeonbuk, Korea
Park, Jae-Moon ; Ryang, Woo-Hun ; Cho, Kyu-Seong ;
Journal of the Korean earth science society, volume 28, issue 7, 2007, Pages 747~761
DOI : 10.5467/JKESS.2007.28.7.747
This study is to develop teaching aids and materials for geological fieldwork and to maximize their effects in educating high school students in Korea. The site of geological fieldwork, Kyokpo Chaeseokgang area, is located in Byunsan national park in Jeonbuk Province. The sedimentary succession of Chaeseokgang developed in the era of Cretaceous shows large-scale and distinct sedimentary structures on sea cliffs. In this study, teaching aids and materials of earth science for secondary-level students were developed based on the sedimentary structures of Chaeseokgang. A 5-step teaching model of earth science fieldwork was applied to a group of 13 students, who had been involved in clubs related to earth science in a science high school, using teaching aids and materials developed in this study. The teaching aids and fieldwork-related materials were also presented to a group of 37 students, who did not take fieldwork or fieldwork-related classes during the period of the study. The results of this study showed that the use of fieldwork-related aids and materials was effective in helping the students in both groups improve their self-directed teaming and practical understanding of earth science.
Misconceptions of the Freshmen at High School about Plate Tectonics
Jeong, Kyoung-Jin ; Jeong, Ku-Song ; Moon, Byoung-Chan ; Jeong, Jin-Woo ;
Journal of the Korean earth science society, volume 28, issue 7, 2007, Pages 762~774
DOI : 10.5467/JKESS.2007.28.7.762
The purpose of this study was to investigate misconceptions about plate tectonics which spread widely among freshmen at high school with drawing. For this, we chose 6 conceptions about plate tectonics by analysis of 7th curriculum and of 11 kinds of science textbooks. Questionnaire of drawing about plate tectonics were developed depending on them. Data was collected from 134 students who was freshmen at high school in Daegu. The result of this study was as follows. First, In structure of plate, `upper mantle type` and `crust type` misconceptions were more than half of the respondents. Second, In distribution of plate, `cracked earthquake zone type` and `earthquake frequency type` misconceptions were more than half of the respondents. Third, In formation of ocean ridge at oceanic crust- oceanic crust divergent plate boundary, `divergence type` and `collision type` misconceptions were more than half of the respondents. Fourth, In formation of mountain ridge at continental crust- continental crust convergent plate boundary, `collision type` misconceptions were more than half of the respondents. Fifih, In formation of mountain ridge at oceanic crust- continental crust convergent plate boundary, `subduction type` and `fault type` misconceptions were more than half of the respondents. Sixth, In transform-fault at oceanic crust- oceanic crust transform-fault boundary, `direction type` and `section type` misconceptions were almost half of the respondents. In this study, students` drawings about plate tectonics showed similar misconceptions. This imply that drawing conceptions can be used by the strong evidence of misconceptions which spread widely among students. Furthermore, this study has a significance that this conclusion is useful to teachers as basic teaching-teaming materials of plate tectonics.
The Structure and Conceptual Changes of Preservice Secondary Teachers` Alternative Conceptions on Radioactive Isotopes
Oh, Jun-Young ; Kim, Sang-Su ; Kang, Yong-Hee ;
Journal of the Korean earth science society, volume 28, issue 7, 2007, Pages 775~788
DOI : 10.5467/JKESS.2007.28.7.775
This study was aimed to understand the structures of preservice secondary school teachers` alternative conceptions on radioactive isotopes in the interior of earth. The structure of their conceptions were analyzed by the suggestions of Niaz (1988) based on the Lakatosian frameworks. The survey was carried out on a group of seventeen students who were major in science education. The research method was open-ended written questionnaire. The results of this study show that students had apparent alternative conceptions. The high temperature and pressure` explanation for radioactive decay in earth`s interior had most import effects on their alternative conceptions. It was also intended to survey their conceptional change by our teaching strategies of the philosophy of science in order to construct science concepts.
Comparison of the Pre-service Elementary Teachers` Understandings of the Basic Concepts of Astronomy and Their Attitudes Toward Astronomy between Korea and Japan
Lee, Myon-U ; Jang, Eun-Suk ;
Journal of the Korean earth science society, volume 28, issue 7, 2007, Pages 789~802
DOI : 10.5467/JKESS.2007.28.7.789
This study investigated pre-service elementary teachers` understanding of the basic concepts of and their attitudes toward astronomy in Korea and Japan. The survey instrument called the Astronomy Diagnostic lest (ADT) that was developed by the Collaboration for Astronomy Education Research (CAER) in 1998 was used and modified to tailor to the two countries` contexts, including 12 items written in the two languages, Korean and Japanese. The attitudes toward astronomy were examined by the Survey of Attitudes toward Astronomy (SATA), which was developed by Zeilik et al. in 1999. Cronbach`s alpha of this sample of the study was 0.69, while the reliability of SATA was 0.87. All the pre-service elementary teachers in both Korea and Japan showed a low-level understanding of the basic concepts of astronomy. 38% of Korean pre-service elementary teachers had correct answers to the questions regarding the basic conceptions of astronomy, while 37% of Japanese participants had correct answers to them. Although there was no statistically significant difference between Korean and Japanese pre-service elementary teachers, Korean teachers scored higher than Japanese participants in SATA. A significant difference, however, was revealed in the categories of cognitive competence and value of the attitudes toward astronomy (p <.05). In addition, it was found that both Korean and Japanese pre-service elementary teachers scored less than 40% about the basic concepts of astronomy and that they obtained lower scores than the US college students with regard to the attitudes toward astronomy.
The Development and Application of Assessment Standards for the Reflection of Science Museum Exhibitions in the Curriculum: A Case Study of the Contents of Earth Science in Elementary School
Lee, Chang-Zin ; Ryu, Chun-Ryol ; Shin, Myeong-Kyeong ;
Journal of the Korean earth science society, volume 28, issue 7, 2007, Pages 803~810
DOI : 10.5467/JKESS.2007.28.7.803
The purpose of this study is to develop and apply assessment standards for the reflection of science museum exhibitions in science curriculum. Assesment standards were developed based on the national achievement standards for earth science in elementary school. The researchers measured the reflection level and evaluation scale by applying the developed assesment standards to exhibitions in the National Science Museum. The results of this study showed that the reflection level and evaluation scale of science curriculum far elementary school in the National Science Museum were measured as 52% and 3.53 respectively. Especially, the level of the reflection of science curriculum in the National Science Museum was found to be at the high level in Geologic field and Astronomic field. These results indicate that the National Science Museum as an informal education institute is comparatively well connected to science education of elementary school. Science museum should be connected with school education and it should start after a substantial reflection on the curriculum. For this, science museum need to develop standards that reflect science curriculum. From this point of view, the results of this study can be used as basic data that evaluate the level of connection between science museum and school education and that guide the direction of development of science curriculum.
Comparative Analysis of the Function and Structure of Photographs and Illustrations Used in High School Earth Science Textbooks of the 6th and 7th National Curriculum
Lee, Ki-Young ;
Journal of the Korean earth science society, volume 28, issue 7, 2007, Pages 811~824
DOI : 10.5467/JKESS.2007.28.7.811
Photographs and illustrations are integral parts of current science textbooks` inscriptions. This study analysed and compared the function and structure of photographs and illustrations used in high school earth science textbooks of the 6th and 7th national curriculum. The findings of the function analysis showed that `illustrative` function was far superior to other functions in terms of frequency and ratio. The illustrative function varied more in the 7th curriculum textbooks, especially in earth science I. `Explanatory` and `complementary` functions, which were relatively ignored in the 6th curriculum, significantly increased in the 7th curriculum textbooks. `Decorative` function increased on the whole. The results of the structure analysis revealed that indexical reference remarkably decreased in the 7th curriculum textbooks, which means the retrogression of co-deployment with main text. `Multiple` organized photographs and illustrations significantly increased in the 7th curriculum textbooks, while `pair` and `series` organization did not show an increase at all. It was suggested in this study that `inquisitive` function and `complementary` organization should be supplemented in terms of both function and structure. Moreover, the functional and structural aspects of scientific inscriptions including photographs and illustrations should be utilized by the certification criteria of science textbooks.
Precise Terrain Torrection for Gravity Measurement Considering the Earth`s Curvature
Choi, Kwang-Sun ; Lee, Young-Cheol ; Lim, Mu-Taek ;
Journal of the Korean earth science society, volume 28, issue 7, 2007, Pages 825~837
DOI : 10.5467/JKESS.2007.28.7.825
The researchers compiled two sets of digital terrain data released by NORI (National Oceanographic Research Institute, Korea) and NIMA (National Imagery and Mapping Agency, USA) respectively and analyzed a new set of
gridded terrain data in order to calculate terrain correction value in gravity in and around the Korean Peninsula. Using this new set of terrain data, the researchers developed an effective algorithm to calculate precise terrain correction value in gravity considering Earth`s curvature and coded a fortran program to evaluate terrain correction value covering the surface of which the radius reaches up to 166.735 km. The researchers also calculated terrain correction value over the southern part of Korea. According to the statistics of terrain correction value calculated in and around the Korean Peninsula up to 166.735 km of surface radius, the maximum value soars to 56.508 mGal and the mean value is 4.539 mGal.
The Measurement System and Physical Property of Unconsolidated Sample under Trinxial Pressure
Bae, Wi-Sup ; Chung, Tae-Moon ; Kwon, Young-Ihn ; Kim, Hyun-Tae ;
Journal of the Korean earth science society, volume 28, issue 7, 2007, Pages 838~846
DOI : 10.5467/JKESS.2007.28.7.838
A measurement system of tri-axial pressure was designed and constructed to measure permeability and resistivity under changing confining pressure. The system was designed to measure the permeability and resistivity of a core simultaneously, consisting of tri-axial supporting device and sets of dual-flow measurement. In this measurement system the permeability and resistivity of a sample can be directly measured and porosity can be obtained using Archie`s laws. As for physical properties, artificial core samples are made from mixtures of standard commercial sand and mud of illite. In-situ sediment cores were sampled at the water-depth of 1,800m in the Ulleung Basin East Sea. In order to investigate the effects of confining pressure changes on physical properties, permeability and resistivity changes were monitored with increasing confining pressure. In this study, it was found that with the increase of confining pressure, permeability and porosity tend to decrease and resistivity tend to increase exponentially.
Kinematics and Geometrical Structure of the Planetary Nebula NGC 6881
Lee, Sang-Min ; Hyung, Siek ;
Journal of the Korean earth science society, volume 28, issue 7, 2007, Pages 847~856
DOI : 10.5467/JKESS.2007.28.7.847
The Planetary nebula NGC 6881 displays quadrupole morphology and it also has a jet feature in its image. We investigated the line profiles of the optical region spectral emission lines, using the Hamilton Echelle Spectrograph (HES) at the Lick observatory. The HES data obtained in this study was the radiation coming from the inner region within the diameter of 4 second of arc. Expansion velocity was obtained, based on the strong emission line profiles of e.g. H, Hel, Hell, [OIII], [NII], [ArIII], [SII], and [SIII}, using the IRAF and StarLink/Dipso reduction packages. The HI recombination lines showed one single peak profile, while the He and forbidden strong lines displayed double peaks. The results of this study show that the outflow velocity of gas increases radially outwards due to the central stellar radiation pressure. It was concluded that three central rings appeared in the HST image are the result of a combined structure of bipolar cones (seen in e.g. HI lines) and a ring (seen in He, [SIII] lines) in projection.
Structure and Evolution of a Numerically Simulated Thunderstorm Outflow
Kim, Yeon-Hee ; Baik, Jong-Jin ;
Journal of the Korean earth science society, volume 28, issue 7, 2007, Pages 857~870
DOI : 10.5467/JKESS.2007.28.7.857
The structure and evolution of a thunderstorm outflow in two dimensions with no environmental wind are investigated using a cloud-resolving model with explicit liquid-ice phase microphysical processes (ARPS: Advanced Regional Prediction System). The turbulence structure of the outflow is explicitly resolved with a high-resolution grid size of 50m. The simulated single-cell storm and its associated Kelvin-Helmholtz (KH) billows are found to have the lift stages of development maturity, and decay. The secondary pulsation and splitting of convective cells resulted from interactions between cloud dynamics and microphysics are observed. The cooled downdrafts caused by the evaporation of rain and hail in the relatively dry lower atmosphere result in thunderstorm cold-air outflow. The outflow head propagates with almost constant speed. The KH billows formed by the KH instability cause turbulence mixing from the top of the outflow and control the structure of the outflow. Ihe KH billows are initiated at the outflow head, and pow and decay as moving rearward relative to the gust front. The numerical simulation results of the ratio of the horizontal wavelength of the fastest growing perturbation to the critical shear-layer depth and the ratio of the horizontal wavelength of the billow to its maximum amplitude are matched well with the results of other studies.
Analysis of Response Spectrum of Ground Motions from Odaesan Earthquake (2007/01/20)
Kim, Jun-Kyoung ;
Journal of the Korean earth science society, volume 28, issue 7, 2007, Pages 871~877
DOI : 10.5467/JKESS.2007.28.7.871
The response spectrum was studied using the observed pound motion from the Odaesan Earthquake (2007/01/20), and then the results were compared to the seismic design response spectra (Reg Guide 1.60) applied to the domestic nuclear power plants. For the response spectrum analysis, 21 horizontal and 8 vertical observed Pound motions were used for normalization and statistical analysis. The results showed that the MPOSD (Mean Plus One Sigma Standard Deviation) response spectra above 10 Hz revealed higher values than the design response spectra and those below 10 Hz revealed much lower values fur both horizontal and vertical response spectra. These results suggest that the response spectra (Reg. Guide 1.60), used as seismic design code for nuclear facilities in Korea, especially above about 10 Hz, should be reexamined fur apllication to the nuclear power plants structures operated in the Korean Peninsula.
A Study of the Development of a Korea Wind Chill Temperature Index (I) - Focusing on the Distribution of Existing Wind Chill Temperature Index and Sensitivity Analysis of Model -
Park, Jong-Kil ; Jung, Woo-Sik ; Kim, Eun-Byul ; Park, Gil-Un ;
Journal of the Korean earth science society, volume 28, issue 7, 2007, Pages 878~890
DOI : 10.5467/JKESS.2007.28.7.878
This study aimed to provide a fundamental basis for the development and promotion of a Korea windchill temperature index model in the field of human biometeorology. For this, a sensitivity model currently being used by KMA (Korea Meteorological Administration) was analyzed. The results of the analysis showed that the Korean peninsula could be divided into the urban area, the coastal/island area, the inland area, and the mountain area. The average temperature was highest in the coastal/island area, while it was lowest in the mountain regions. The lowest temperature in the urban and coastal/island areas was 20 degrees below zero and that in the inland and mountain regions were 30 degrees below zero. As for wind speed, both average and maximum wind speed were highest in the coastal/island area. The distribution of temperature and wind speed in winter was similar to that of the entire period. The results of the JAG/Tl and Missenard model sensitivity showed that temperature tends to have more influence on sensitivity than any other factors. In sub-zero temperature, however, the influence of wind speed tends to increase.
A Study of the Development of a Korea Wind Chill Temperature Index (II) - A Preliminary Study of the Development of the Korea Wind Chill Temperature Index -
Park, Jong-Kil ; Jung, Woo-Sik ; Kim, Byung-Soo ; Yoon, Sook-Hee ; Lee, Jong-Tae ; Nam, Jae-Cheol ; Ryoo, Sang-Boom ; Kim, Eun-Byul ; Park, Gil-Un ; Song, Jeong-Hui ;
Journal of the Korean earth science society, volume 28, issue 7, 2007, Pages 891~902
DOI : 10.5467/JKESS.2007.28.7.891
This paper aims to develop a Korea wind chill temperature index using an experimental method. For this, the researchers carried out a preliminary experiment in order to of for provisions necessary for the selection and safety of test participants, accuracy of experiment, and readiness for various situations that may occur during experiment. The researchers also investigated test subjects` safety and experiment conditions in which wind speed changes from calm condition into strong wind speed condition under the constant air temperature of
. The results of this study are as follows. With regard to the variation of facial skin temperature such as forehead, cheek, nose, and chin, the skin temperature of cheek closely appears to depend on the change of air temperature and wind speed, exhibit a stable variation trend of skin temperature, and indicate the lowest temperature than any other facial parts. The skin temperature of women tends to be more sensitive than that of man and the skin temperature of human tends to decrease at weak wind speed under constant air temperature. It was also found that it is not necessary to take the influence of standard wind speed into consideration when a wind chill index is developed.
The S-wave Velocity Structure of Shallow Subsurface Obtained by Continuous Wavelet Transform of Short Period Rayleigh Waves
Jung, Hee-Ok ; Lee, Bo-Ra ;
Journal of the Korean earth science society, volume 28, issue 7, 2007, Pages 903~913
DOI : 10.5467/JKESS.2007.28.7.903
In this study, the researchers compared the S-wave velocity structures obtained by two kinds of dispersion curves: phase and group dispersions from a tidal flat located in the SW coast of the Korean peninsula. The
stacking method was used for the phase velocity and two different methods (multiple filtering technique: MFT and continuous wavelet transform: CWT) for the phase velocity. It was difficult to separate higher modes from the fundamental mode phase velocities using the
method, whereas the separation of different modes of group velocity were easily achieved by both MFT and CWT. Of the two methods, CWT was found to be more efficient than MFT. The spatial resolutions for the inversion results of the fundamental mode for both phase and group velocities were good for only a very shallow depth of
. On the other hand, the spatial resolutions were good up to
when both the fundamental and the 1st higher mode poop velocities obtained by CWT were used for S-wave inversion. This implies that the 1st higher mode Rayleigh waves contain more information on the S-wave velocity in deeper subsurface. The researchers applied the CWT method to obtain the fundamental and the 1st higher mode poop velocities of the S-wave velocity structure of a tidal flat located in SW coast of the Korean peninsula. Thea the S-wave velocity structures were compared with the borehole description of the study area.
Variations of Grain Textural Parameters of Beaches by Coast Development at East Coast Korea Peninsula
Oh, Jea-Kyung ; Jeong, Sun-Mi ; Cho, Yong-Goo ;
Journal of the Korean earth science society, volume 28, issue 7, 2007, Pages 914~924
DOI : 10.5467/JKESS.2007.28.7.914
This study is to compare differences in the depositional environments of natural beaches with those of beaches developed with artificial structures in the East Coast of Korea. Naksan-Osan beaches were selected for the examination of natural beaches and Anmok-Yumjun beaches for that of developed beaches. The study was performed on the foreshores and backshores of the selected beaches, and was based on the field research during the flood period of year 2004 and the dry period of year 2005. In Naksan-Osan beaches, pain size is fuel and sorting is better from northern coast to southern coast. Furthermore, sediment undergoes changes regularly and seasonal variations are small. But in Anmok-Yumjun beaches, grain size is coarser and sorting is worse than in Naksan-Osan beaches, showing irregular tendencies. The characteristic features of the two beaches would be effected by longshore currents which change along the type of coast line and have an effect on sediment. Especially, long shore currents interrupted by artificial structures in Anmok-Yumjun beaches may cause sedimental environment changes. In Anmok-Yumjun beaches, harbor expansions will be continued, and thus more changes are expected to occur in the beaches.
An Interpretation of Changes in Groundwater Level and Electrical Conductivity in Monitoring Wells in Jeiu Island
Lee, Jin-Yong ; Lee, Gyu-Sang ; Song, Sung-Ho ;
Journal of the Korean earth science society, volume 28, issue 7, 2007, Pages 925~935
DOI : 10.5467/JKESS.2007.28.7.925
Water sources in volcanic Jeju Island are almost entirely dependent on groundwater because there are actually no perennial streams or rivers due to the permeable nature of surface soils derived from basaltic or trachytic rocks. Uncontrolled development of groundwater resulted in substantial water-level decline, groundwater pollution, and seawater intrusion in several places of the island. To maintain its sustainable groundwater, the provincial government has declared some parts of the island as the Special Groundwater Conservation/Management Area since 1994. Hence, all the activities for the groundwater development in the area should obtain official permit from relevant authorities. Furthermore, to acquire information on groundwater status, a network of groundwater monitoring was established to cover most of the low land and coastal areas with the installation of automatic monitoring systems since 2001. The analysis of the groundwater monitoring data indicated that the water levels had decreased at coastal area, especially in northern part of the island. Moreover, very high electrical conductivity (EC) levels and their increasing trends were observed in the eastern part, which was ascribable to seawater intrusion by intensive pumping in recent years. Water level decline and EC rise in the coastal area are expected to continue despite the present strict control on additional groundwater development.
Geopotentinl Field in Nonlinear Balance with the Sectoral Mode of Rossby-Haurwitz Wave on the Inclined Rotation Axis
Cheong, Hyeong-Bin ; Park, Ja-Rin ;
Journal of the Korean earth science society, volume 28, issue 7, 2007, Pages 936~946
DOI : 10.5467/JKESS.2007.28.7.936
Analytical geopotential field in balance with the sectoral mode (the first symmetric mode with respect to the equator) of the Rossby-Haurwitz wave on the inclined rotation axis was derived in presence of superrotation background flow. The balanced field was obtained by inverting the divergence equation with the time derivative being zero. The inversion consists of two steps, i.e., the evaluation of nonlinear forcing terms and the finding of analytical solutions based on the Poisson`s equation. In the second step, the forcing terms in the from of Legendre function were readily inverted due to the fact that Legendre function is the eigenfunction of the spherical Laplacian operator, while other terms were solved either by introducing a trial function or by integrating the Legendre equation. The balanced field was found to be expressed with six zonal wavenumber components, and shown to be of asymmetric structure about the equator. In association with asymmetricity, the advantageous point of the balanced field as a validation method for the numerical model was addressed. In special cases where the strength of the background flow is a half of or exactly the same as the rotation rate of the Earth it was revealed that one of the zonal wavenumber components vanishes. The analytical balanced field was compared with the geopotential field which was obtained using a spherical harmonics spectral model. It was found that the normalized difference lied in the order of machine rounding, indicating the reliability of the analytical results. The stability of the sectoral mode of Rossby-Haurwitz wave and the associated balanced field was discussed, comparing with the flrst antisymmetric mode.
A Simple Introduction of Extratropical Transition of Tropical Cyclone (TC) and a Case Study on the Latest Three TCs: Shanshan (0613), Yaki (0614), and Soulik (0618)
Choi, Ki-Seon ; Kim, Baek-Jo ;
Journal of the Korean earth science society, volume 28, issue 7, 2007, Pages 947~956
DOI : 10.5467/JKESS.2007.28.7.947
In this article, the extratropical transition (ET) of tropical cyclone (TC) was investigated based on the case study covering the latest three TCs (Shanshaa Yaki, and Soulik) associated with ET evolution (onset and completion) using the objective 37 diagnostics of Evans and Hart (2003) and Hart (2003). At 500-hPa level, on an onset of ET, all three TCs entered the baroclinic zone. In a vertical cross-section analysis, three TCs before and at an onset of ET kept warm and humid throughout all levels around the TC center. However, these TCs after ET onset became relatively cold and dry over the western part of TC as the typical characteristics of ET concept model. Although our case study was not sufficient, it is concluded that the diagnostics of the ET onset and atmospheric structure change associated with Evans and Hart (2003) and Hart (2003) will be useful in ET operational forecast.