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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 30, Issue 7 - Dec 2009
Volume 30, Issue 6 - Oct 2009
Volume 30, Issue 5 - Sep 2009
Volume 30, Issue 4 - Aug 2009
Volume 30, Issue 3 - Jun 2009
Volume 30, Issue 2 - Apr 2009
Volume 30, Issue 1 - Feb 2009
Selecting the target year
Geochemical Study of the Cretaceous Granitic Rocks in Yeosu Area
Wee, Soo-Meen ; Kim, Eun-Hyo ;
Journal of the Korean earth science society, volume 30, issue 3, 2009, Pages 267~281
DOI : 10.5467/JKESS.2009.30.3.267
Cretaceous intrusive and extrusive rocks are widely distributed in the southern part of the Korean peninsula, possibly the result of intensive magmatism which occurred in response to subduction of the Pacific plate beneath the northeastern part of the Eurasian plate. Geochemical and petrological study on the Cretaceous granitic rocks of the Yeosu area were carried out in order to constrain the petrogenesis of the granitic rocks and to establish the paleotectonic environment of the southwestern part of the Korean peninsula. Igneous rocks of the Yeosu area consist of diorite, hornblende biotite pite and micrographic granite. Chondrite normalized REE patterns show generally enriched in LREE (
=4.2-13.3). Diorites show flat to slight negative Eu anomalies while micrographic granites have strong negative Eu anomalies. The
of the granites are 76.2-235 ppm, which corresponds to the range of the continental margin granite. Whole rock chemical data of the granitic rocks from the Yeosu area indicate that the rocks have characteristics of calc-alkaline series in the subalkaline field. On the A/NK vs. A/CNK and tectonic discrimination diagrams, parental magma type of the granites corresponds to I-type and volcanic arc granite (VAG). Interpretations of the chemical characteristics of the granitic rocks favor their emplacement in a compressional tectonic regime at continental margin during the subduction of Pacific plate.
East Asian Precipitation and Circulation Response to the Madden-Julian Oscillation
Han, Sang-Dae ; Seo, Kyong-Hwan ;
Journal of the Korean earth science society, volume 30, issue 3, 2009, Pages 282~293
DOI : 10.5467/JKESS.2009.30.3.282
This study examines the effects of the Madden-Julian oscillation (MJO) or the Intraseasonal Oscillation (ISO) on precipitation, temperature and circulation anomalies over East Asia according to the eight different MJO phases during the winter and summer seasons. A nonlinear response appears the wintertime precipitation pattern during the phase of 3 (where the MJO center is located over the Eastern Indian Ocean) and 8 (where the MJO center is located over the Western Hemisphere) over the Korean Peninsula. That is, for these phases, the positive precipitation anomalies appear for the MJO intensity less than 2 standard deviations while the negative precipitation anomalies appear in the case of the MJO intensity greater than 2 standard deviations. The negative precipitation anomaly in the latter case is duandard d stronger anomalous anticyclone formed over the Korean Peninsula and cold and dry advection by northerly winds. The response of precipitation and circulation to the boreal summer ISO is also investigated.
Prediction of Tropical Cyclone Intensity and Track Over the Western North Pacific using the Artificial Neural Network Method
Choi, Ki-Seon ; Kang, Ki-Ryong ; Kim, Do-Woo ; Kim, Tae-Ryong ;
Journal of the Korean earth science society, volume 30, issue 3, 2009, Pages 294~304
DOI : 10.5467/JKESS.2009.30.3.294
A statistical prediction model for the typhoon intensity and track in the Northwestern Pacific area was developed based on the artificial neural network scheme. Specifically, this model is focused on the 5-day prediction after tropical cyclone genesis, and used the CLIPPER parameters (genesis location, intensity, and date), dynamic parameters (vertical wind shear between 200 and 850hPa, upper-level divergence, and lower-level relative vorticity), and thermal parameters (upper-level equivalent potential temperature, ENSO, 200-hPa air temperature, mid-level relative humidity). Based on the characteristics of predictors, a total of seven artificial neural network models were developed. The best one was the case that combined the CLIPPER parameters and thermal parameters. This case showed higher predictability during the summer season than the winter season, and the forecast error also depended on the location: The intensity error rate increases when the genesis location moves to Southeastern area and the track error increases when it moves to Northwestern area. Comparing the predictability with the multiple linear regression model, the artificial neural network model showed better performance.
Understanding on the Fossilization of Middle School Students
Hwang, Koo-Geun ; Cho, Kyu-Seong ; Huh, Min ;
Journal of the Korean earth science society, volume 30, issue 3, 2009, Pages 305~316
DOI : 10.5467/JKESS.2009.30.3.305
Experiments to explain fossilization have been introduced in elementary and middle school science textbooks. Most of them have explained the processes by the mold and cast formed by imprint of bivalve or leaf. The processes explained in the textbooks are more similar to that of trace fossil than body fossil, because the external molds from experiment are imprints after the model was taken off. However fossils of the figures in the textbooks are mostly body fossils. Therefore, the students may be willing to equate the experiment process with the fossilization of the body fossils. The misconceptions were confirmed in this study by the questionnaire which asked 9th grade students on this subject. Many students thought that the body fossils were fossilized imprints and the fossils of terrestrial organism were formed on land without transportation, that is, they did not understand well about biostratinomy and crustal movement. The misconception about the environment in which fossils formed was already reported in a survey on the elementary school students, but has not revised until ninth grade. Therefore, to remove the misconception related to the fossilization, the fossil models in the experiments may be replaced by trace fossils, or new experiments for body fossil should be designed.
Perceptual Change of Undergraduate Students Majored in Theology about the Origins of Universe and Life
Ahn, Yu-Min ; Jung, Jae-Hoon ; Choe, Seung-Urn ;
Journal of the Korean earth science society, volume 30, issue 3, 2009, Pages 317~329
DOI : 10.5467/JKESS.2009.30.3.317
By comparing the understandings of theology major with science major in a college, this study investigates how theology major students view the origin of universe and life and how they portray the view of sciences. In addition, this study examines how theology majors change their viewpoints through a series of lectures related to understanding of the modem sciences. Twenty six theology majors and nineteen science education majors participated in the survey investigation. For theology majors, questionnaire data revealed that 42% of theology majors support theistic evolution, while 42% responses with young and old Earth creation and none with evolutionism. On the other hand, most respondents in science education major espoused evolutionism and no one with extreme creationism. Most respondents with creationism shared the insights that science is an instrument for describing the creator's work, whereas most with evolutionisms perceived science as a logical and descriptive system of the natural world. After taking science courses, the theology majors' support of an extreme view like young Earth creationism has decreased by 4% (was 23%), while their support of the theistic evolution increased by a small percentage. This result lends support to the idea that science related courses helps theology major undergraduate students to understand the scientific evolutionism based on their theological backgrounds.
An Analysis of Earth Science Teachers' Topic-Specific Pedagogical Content Knowledge: A Case of Pre-service and In-service Teachers
Lee, Ki-Young ;
Journal of the Korean earth science society, volume 30, issue 3, 2009, Pages 330~343
DOI : 10.5467/JKESS.2009.30.3.330
Pedagogical content knowledge (PCK) has been regarded as an indication of science teachers' professionalism. The purpose of this study was to analyze topic-specific PCK of pre-service and in-service science teachers, comparatively. For this purpose, we developed an analytic framework for explicitly documenting science teacher' PCK and applied the framework for analyzing the difference within the same topic and with two different topics. Findings are as follows: (1) With the same topic, there was considerable difference between pre-service and in-service teachers in the components of PCK, not to mention individual difference. (2) In case of two different topics, we did not recognize a tendency of change in PCK, but remarkable differences in PCK were identified between two different topics. This study affirmed the topic specificity of PCK, and discussed a possibility of employing PCK analytic framework and its profile as one of the tools that could be used to develop and assess teachers' professionalism.
Astronomical Observation Environment Study focusing on Night Sky Brightness Variation under Light Pollution
Lee, Jin-Hee ; Choe, Seung-Urn ; Jung, Jae-Hoon ; Woo, Hong-Gyun ;
Journal of the Korean earth science society, volume 30, issue 3, 2009, Pages 344~353
DOI : 10.5467/JKESS.2009.30.3.344
By measuring the brightness of night sky, we have investigated light pollution around the observatory in the College of Education, Seoul National University. As a result of measuring the extinction coefficient and photometric constants by standardization, in January 28, 2009, the extinction coefficient found to be
=0.359 and photometric constant was
=4.397. In March 27, 2009, extinction coefficients were
=0.725, and photometric constants were
=6.027. Brightness of the night sky was measured from east, west, south, and north each by altitude of
. Data reduction and analysis was based on IRAF. Seeings for the each day of observation were 5.1 and 5.7 arcseconds in January 28 and March 27, respectively. Night sky spanned the magnitude range of
We found that the brightness of night sky located at downtown was twice to four times brighter. On these observational conditions, limiting magnitude within 40cm-telescope becomes 11-13 magnitudes. Compared with Jan 28 and Mar 27, night sky brightness of January is 1 magnitude fainter than that of March in B filter.
Analysis of Professional Development in Teaching Practices of Beginning Secondary Science Teachers
Kwak, Young-Sun ;
Journal of the Korean earth science society, volume 30, issue 3, 2009, Pages 354~365
DOI : 10.5467/JKESS.2009.30.3.354
In this research, we investigated the support system and professional development in teaching practices of beginning science teachers through instructional consulting. Using open-ended interviews with the participating teachers and group discussions taking place on a regular basis to analyze and compare classes of six beginning teachers, we analyzed beginning teachers' professional development efforts centering around their teaching practices. The group discussion consisted of 6 beginning teachers and another 6 experienced teachers, they discussed and cross-analyzed beginning teachers' 9th lessons on middle school science unit, 'Work and Energy.' The characteristics of beginning science teachers' professional development drawn from this research are: (1) beginning teachers' teaching practices they were taught, (2) lack of reflection on their teaching practices, (3) no guidance for beginning teachers regarding ways to teach, (4) lack of communication between teachers about teaching science, and (5) lack of time for instructional preparation due to other heavy workload. Suggestions for ways to improve and support beginning teachers' professional development are discussed with experienced teachers. Required conditions for an effective induction program are also discussed.
The Differences of Reflective Inquiry according to Students' Characteristics and Interaction Modes of Small Group in an Inquiry-based High School Earth Science
Jeong, Jin-Woo ; Park, Mi-Ra ;
Journal of the Korean earth science society, volume 30, issue 3, 2009, Pages 366~380
DOI : 10.5467/JKESS.2009.30.3.366
The purpose of this study was to investigate the differences of reflective inquiry according to students' characteristics and interaction modes of small group in three contexts of the classroom and to obtain educational implications about using small group and teacher's intervention for an effective reflective inquiry. We transcribed and analyzed the students' conversation in inquiry activities of small group with frameworks of linguistic behavior and three contexts of the classroom. The result of the study indicated that individual and group reflective inquiry could be affected by the relationship with peers more than their own characteristics.
Introduction of the Global Geodetic Observing System
Shin, Young-Hong ; Park, Jong-Uk ; Seo, Ki-Weon ;
Journal of the Korean earth science society, volume 30, issue 3, 2009, Pages 381~397
DOI : 10.5467/JKESS.2009.30.3.381
The Modem Geodesy monitors physical and geometrical shape and motion of the Earth and, more importantly, its temporal variations with unprecedented precision. It provides accurate and stable reference frames for Earth observations in the Space era. Furthermore, with an aid of interdisciplinary approaches, it also traces the causes of the variations in shape and motion of the Earth and eventually contributes to a better understanding of the Earth system. The International Association of Geodesy (IAG) has established the Global Geodetic Observing System (GGOS) to integrate the multitude of geodetic tools and tried to contribute to the management of global environmental changes as a partner of the Global Earth Observation System of Systems (GEOSS). Here we introduce the contribution of geodesy to the various fields of Earth Science by focusing on GGOS and encourage interdisciplinary researches.