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Paleohydrologic Activity and Environmental Change on Mars
김경자,Dohm, James M.,Kim, Kyeong-Ja 한국제4기학회 2009 제사기학회지 Vol.23 No.1
Results from the most recent decade of Mars' missions to Mars highlight a liquid water and water-ice sculpted landscape. Evidence includes layered sedimentary sequences with weathered outcrops, debris flows, fluvial valleys, alluvial fans, deltas, glacial and periglacial landscapes, and geochemical/mineralogical signatures of aqueous activity, including the formation of sulfates and clays, and the leaching and deposition of elements such as potassium, thorium,and iron. Such evidence indicates weathered zones and possible paleosols in stratigraphic sequences, transport of water and rock materials to sedimentary basins, and the possible formation of extensive transient lakes and possibly transient oceans on Mars. This new evidence is consistent with Viking-era geologic investigations that reported magmatic-driven flooding, ponding to form large water bodies in the northern plains, and transient (tens of thousand of years) hydrological cycles. It may even indicate aqueous activity at present. Both endogenic (magmatic driven) and exogenic (both impact cratering and changes in orbital parameters) have influenced paleohydrologic and environmental change on Mars. Abundance of water and dynamic activity would be decisively important for the possibility of past and present life on Mars.
김경자(Kyeong Ja Kim),이주희(Ju-Hee Lee),이승렬(Seung-Ryeol Lee),심은섭(Eun-Sup Sim) 한국암석학회 2007 암석학회지 Vol.19 No.4
오늘날 X-선을 이용한 표면탐사기술은 널리 활용되는 기술의 하나이다. 또한 X-선 측정기술은 행성표면탐사를 위한 연구에서도 궤도선 및 주행장치 탑재용 과학장비로서도 성공적으로 활용된 예가 여러 차례 있었다. 우리나라는 2020년경 궤도선 및 착륙선을 이용한 달 탐사계획을 추진하고 있으며, 이에 맞추어 궤도 및 착륙선 탑재용 우선 순위 과학장비의 개발 및 달에 관한 기초연구를 해야 하는 실정이다. 따라서 X-선 측정기술을 이용한 행성탐사의 현황 및 이 분야의 기술 발전 전망에 대한 고찰을 하였다. Technology of surface investigation using X-ray is one of widely used technology nowadays. This technique has been numerously used for planetary surface investigations for both orbital and rover scientific instruments. Korea has a plan to send an orbiter and lander to the Moon by the early 2020s. Therefore, the time has come for Korean researchers to develop major scientific instruments and start to do research on basic research for the Moon. Because of this situation, we firstly investigate X-ray technology, which is essential as one of core techniques of planetary remote sensing from the orbit and ground. This paper presents the current status of planetary exploration using X-ray techniques and new development of worldwide X-ray technology which could be adapted for prospective planetary missions.
김경자(Kyeong Ja Kim),이주희(Ju-Hee Lee),이승렬(Seung-Ryeol Lee),심은섭(Eun-Sup Sim) 한국암석학회 2010 암석학회지 Vol.19 No.4
오늘날 X-선을 이용한 표면탐사기술은 널리 활용되는 기술의 하나이다. 또한 X-선 측정기술은 행성표면탐사를 위한 연구에서도 궤도선 및 주행장치 탑재용 과학정비로서도 성공적으로 활용된 예가 여러 차례 있었다. 우리나라는 2020년경 궤도선 및 착륙선을 이용한 달 탐사계획을 추진하고 있으며, 이에 맞추어 궤도 및 착륙선 탑재용 우선 순위 과학장비의 개발 및 달에 관한 기초연구를 해야 하는 실정이다. 따라서 X-선 측정기술을 이용한 행성탐사의 현황 및 이 분야의 기술 발전 전망에 대한 고찰을 하였다. Technology of surface investigation using X-ray is one of widely used technology nowadays This technique has been numerously used for planetary surface investigations for both orbital and rover scientific instruments. Korea has a plan to send an orbiter and lander to the Moon by the early 2020s. Therefore, the time has come for Korean researchers to develop major scientific instruments and start to do research on basic research for the Moon. Because of this situation, we firstly investigate X-ray technology, which is essential as one of core techniques of planetary remote sensing from the orbit and ground. This paper presents the current status of planetary exploration using X-ray techniques and new development of worldwide X-ray technology which could be adapted for prospective planetary missions.
연어 중심 영어 어휘지도가 초등학생의 어휘력 및 읽기 능력에 미치는 영향
김경자(Kim, Kyeong-ja),김낙복(Kim, Nahk Bohk) 한국영어어문교육학회 2012 영어어문교육 Vol.18 No.4
The purpose of this study is to investigate Korean elementary school learners’ collocational competence and to identify the effects of collocation-based vocabulary instruction on reading ability. To do this, 62 sixth graders were chosen as the subject group and they were given three kinds of tests: individual vocabulary, collocations, and reading comprehension. Also a survey about the students’ interests of learning English was conducted. They took pre- and post-tests for all of the test types. The results of this study are summarized as follows. First, the experimental group showed much greater improvement in their understanding of collocational expressions than the control group. That suggests the collocational method improves the students’ collocational recognition. Second, the experimental group showed more improvement in reading comprehension than the control group. Third, the experimental group became more interested in studying English and reading while the control group didn’t show any significant difference between the pre- and post-survey regarding their interest in reading. According to these results, when instructors teach English, especially when they teach reading, they need to empower students to recognize the concept of collocation so they can comprehend the contexts of sentences naturally through various chunk-reading activities and methods.
김경자(Kyeong Ja Kim) 한국암석학회 2009 암석학회지 Vol.18 No.1
인류가 육안으로 화성 표면에 대한 연구를 시작한 이래 지금은 최신의 과학적 방법으로 화성에 대한 탐구를 계속하고 있다. 1960년 이후 구소련연방이 화성 코라블(Korable) 4호를 발사한 것을 시작으로 2008년 오늘에 이르기 까지 약 40여 차례의 화성탐사를 시도해 화성에 대한 인류의 궁금 중을 해결해 왔으며, 이제 화성에 인류가 도착하기 위한 꿈에도 도전하고 있다. 이 논평은 현재까지의 이루어진 화성연구에 대한 주요 결과를 고찰한다. Endlessly, mankind has been pursuing its dream toward understanding and conquering our neighboring planet, Mars since Mars has been identified as a planet. After the development of advanced science and technology of human race in 1960, the Union of Soviet Socialist Republics (USSR) had initiated its dream toward Mars and finally at present mankind acquires numerous important clues of Mars through over forties of space programs toward Mars. Furthermore, mankind takes its effort in colonizing Mars within several decades. This manuscript introduces the history of space mission programs of Mars up to date and major scientific findings to understand the Mars.