• Journal of Internet Computing and Services
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• v.15 no.1
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• pp.89-102
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• 2014

Since the Arab spring in 2010, SNS prompted discussions about the roles to organize collective actions. First of all, mobile media and SNS help to mobilize both on and offline social movement, second, to create new forms of collective actions, third, to organize social movement organizations across the world, fourth, to empower movement participants to develop new collective identities. On the other hand, the same technologies also hinder social movements from developing continuity and dedication. In addition, the problems of digital divide might aggravate the divisive process to organize collective actions across the world. This research is built on these ongoing arguments about the potentials and limitations of new media technologies. In particular, this research tries to move beyond the confrontational approaches to the media through the case study of Save The Jeju Island social movements on Facebook. The movement SNS on Facebook aims to provide as well as organize international SMOs and activists that might help deeper understandings on the potentials and limitations of online communication strategies for global social movements.

• Journal of the Korean earth science society
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• v.30 no.3
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• pp.381-397
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• 2009

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.

• The Journal of Engineering Geology
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• v.8 no.1
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• pp.35-49
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• 1998

To interpret the movement historv of the Yangsan fault, the paleostresses were analyzed from about 1,000 striated small faults and 330 extension joints which were measured from 37 sites near and along the strike of the Yangsan fault from Yangsan-si, Kyeongsangnam-do to the Shinkwang-myeon, Kyeongsangbuk-do. Six sequential tectonic events have boen established as followings: (I) NW-SE extension, (Il) ENE-WSW compression and NNW-SSE extension, (III) NW-SE compression, (W) ENE-WSW extension, (V) E-W comoression and N-S extension, and (VI) NNE-SSW compression and(VI) NNE-SSWextension. The movement history of the Yangsan fault rnrning in NNE direction were inteepreted based on these six sequential stress fields. The initial feature of the Yangsan fault was formed at the first stage with the development of extension fractures by tectonic event (I) of NW-SE extension. The fault was acted continuously with a right-1ateral strike-slip movement by tectonic event( II) closely related to event( I). The movements had been continued until the Late Miocene. This age was the most active period in faulting. The left-lateral strike-slip movement was followed by subsequent tectonic events (ffi) and (IV). The activity of the Yangsan fault was suspended temporarily by compression of tectonic event (V) which was perpendicular to the strike of the fault. This period might be very short and the magnitude of the tectonic was also small. In the last stage, the fault acted with slight extension or right-lateral moveenent by tectonic event (VI).

• 한국체육학회지인문사회과학편
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• v.51 no.3
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• pp.353-362
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• 2012

The purpose of this research was to find effects of high fat diet and endurance exercise on mitochondria biosynthesis and insulin resistance in male Wister rat. Th rats were randomly separated into 4 groups: A, Isocaloric high fat diet group (50% of calories from fat), B. Chow group, C. Isocaloric high fat diet with endurance exercise (treadmill running, slop 8%, 23 m/min, 120 min/day, 5 days per week), D. Chow group with endurance exercise. Both Isocaloric high fat diet group and chow group were given an equal caloric composition with 3.2kcal/g. equal amount of food were checked every day and given to both groups. 4 weeks of high fat diet did not show any change in body weight and amount of body fat. Further the level of glucose and insulin in blood, and insulin-stimuilated glucose transport rate in epitrochlearis muscle was not affected by Isocaloric high fat diet. However, the endurance exercise showed statistically significant change in the level of insulin in blood. Although either Isocaloric high fat diet or endurance exercise alone did not change on mitochondria biogenesis marker, Isocaloric high fat diet with endurance exercise could induce the increased level of marker (p<0.05). Also, plasma free fatty acids were increased in this group. From this investigation, Isocaloric high fat diet with moderate-intensity endurance exercise is effective way to induce mitochondrial biogenesis.

• Bulletin of the Korean Space Science Society
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• 2003.10a
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• pp.103-103
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• 2003

공간해상도가 높고 영상 신호량의 증가를 위해 TDI(time delay and integration) 방식의 센서를 이용하는 저궤도 위성카메라의 경우 지구의 자전효과나 위성의 자세 불안정 등으로 인해 촬영된 영상의 퍼짐현상(smearing)이 나타난다. 본 연구에 따르면 선형운동에 의한 결과로 발생하는 영상퍼짐은 위성의 자세제어 특성 뿐 만 아니라 위성의 궤도 특성과 TDI 단계, 지상 촬영 지점의 위도 및 경사촬영 각도에 의해 결정되며 다목적 실용위성 2호(KOMPSAT2)의 탑재카메라를 실례로 살펴본 해상도 1m급의 태양동기궤도 위성의 경우 별도의 보정 과정이 없을 경우 영상의 퍼짐이 심각한 것으로 나타난다. 주된 원인은 지구의 자전효과이며 영상퍼짐의 정도는 위성 직하점의 위도에 따라 변하고 카메라의 경사촬영 각도와는 연관성이 작은 것으로 나타난다. 또한 촬영전에 자세제어를 이용해 카메라의 Yaw축 각도를 조정할 경우 영상퍼짐현상이 현저히 감소함을 보여준다.

• 한국지구과학회:학술대회논문집
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• 2006.02a
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• pp.182-183
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• 2006

• 한국지구물리탐사학회:학술대회논문집
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• 2011.10a
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• pp.73-74
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• 2011

• Proceedings of the KSEEG Conference
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• 2005.04a
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• pp.320-323
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• 2005

• Journal of the Korean earth science society
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• v.22 no.5
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• pp.339-349
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• 2001

The aim of this study is to explore effective teaching strategies through an investigation of the problem-solving abilities and reasons for the unsuccessful problem solving of pre-service teachers. The participants of the study were 60 pre-service teachers who were expected to teach earth science in elementary school (40) and secondary school (20). The participants had taken a course in astronomy before they took part in the present study. The instruments for the study were a paper-and-pencil test and interviews. The results demonstrated that the pre-service teachers' abilities to solve problems were low. The pre-service teachers of the elementary school were inferior to those of the secondary school in their problem solving abilities. The causes for the unsuccessful problem solving were identified as follows: (1) lack of prerequisite knowledge to understand the motions of the moon and the planets, (2) failure to represent problems based on solution principles, (3) failure to apply the knowledge acquired in one setting to another, different setting, (4) frames of reference the frameworks for everyday life situation and for earth science problem situation, and (5) rote-memorization of facts rather than understanding the cause-and-effect relationships. The above causes for unsuccessful problem solving seemed to be related to the characteristics of novice problem solvers in general and of the tasks about the motions of the moon and the planets. Suggestions are made to enhance pre-service teachers' problem solving abilities based on the result of the study.

• Proceedings of the KSEG Conference
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• 2002.04a
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• pp.173-182
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• 2002

단층이동자료를 이용하여 지구조 사건을 분별하고 단층의 운동시기 및 한반도 주변지구조체계와 비교하여 양산단층의 진화과정을 해석하였다. 양산단층은 팔레오세 때 단층형성이 시작되었고 그 후 NW-SE 신장 사건에 의해 우수주향이동을 했다. 우수주향이동은 장구한 시간동안 진행되어 마이오세 초에 확장축이 바뀜에 따라 약간의 변화가 있지만 우수운동은 지속되었다. 마이오세 말에 양산단층은 좌수이동으로 변하여 운동하게 되며, 마이오세 말 혹은 플라이스토세 초에 와서 양산단층은 N-S 방향의 최대 수평압축응력을 받게 된다. 이후 플라이스토세를 전후해서 E-W 방향의 최대수평압축응력에 의해 양산단층은 다시 우수이동을 한다. 이와 같이 양산단층은 한번의 운동으로 발달된 단층이 아니라 서로 다른 응력체계 하에서 다중변형을 받아 현재의 모습으로 진화되었다고 판단된다.