이 연구에서는 최근 수행된 국제 비교 연구인 TIMSS-R과 PISA 2000에 나타난 우리 나라 학생들의 지구 과학영역에 대한 전체적인 성취도 및 성 차이 경향을 파악하였다. 이를 위해 1999년에 실시된 TIMSS-R에 포함된 33개의 지구 과학 관련 문항과 2000년에 실시된 PISA에 포함된 13개의 지구 환경 과학 문항에 대한 국제 및 국내 평균 정답율을 비교하였다. 분석 결과, 우리 나라 학생들은 문항 유형별로는 선택형 문항에서, 수행 영역별로는 단순 정보 이해문항에서 국제 평균 정답율에 비해 큰 차이를 보이며 높게 나타났다. 또한, 우리 나라 학생들은 그래프 해석, 표 해석등 자료 해석과 관련된 문항에서 국제 평균보다 특히 높은 정답율을 나타냈는데, 이러한 경향은 남학생들에게 더 두드러졌다. 한편, 우리 나라 학생들은 천문학 문항에서 상대적으로 가장 낮은 점수를 나타냈으며, 이는 특히 여학생에게 더 심하게 나타났다. 우리 나라 여학생들은 문항의 내용, 유형, 수행 영역 등 모든 부분에서 남학생들보다 낮은 정답율을 보여 심각한 성 차이를 드러냈다.

The coastal waters and the adjacent coastal lands strongly influenced by each other and includes islands, transitional and intertidal ares, salt marshes wetlands and beaches. We focus on the coastal zone because of its unique geographical characteristics, Its ecological and economic importance, and the increasing pressures on its integrity. Our coastal zone have been controlled individually about 50 of a different kind of laws, as a result, to reach an individual purpose of the laws, people have developed the coastal zone without considering environmental condition, which brought about ecological destruction, pollution and devastation of the coastal areas. Finally, In 1999, the Coastal Management Act and the Wetlands Conservation Act were established and hereafter the environmental concern has been increased. They will be an important role to preserve our environment of coastal zone. Here I will examine the Laws concerned with environmental management of coastal zone and indicate immanent problems of it. So, I expect that problems will be improved one by one through this paper

It has been studied a lot to solve the problems concerning about the port management system in Korea. Since the international competitive power of port system in Korea is decreasing these days. This paper suggests that Port Authority should be given to the local government in order to not only properly meet the demands from worldwide change in port condition but also develop the major country which will lead distribution system of northeast Asia in 21th century. In this paper, I also acknowledge the following facts. 1. more power needed for local government to develop and manage port system 2. the harmony of port function and urban capacity needed in order to utilize the extending effect from port development.

Under the limited arable land, the enhancement of agricultural productivity is indispensable to provide the food demand which is concomitant with the rapid increase in population. From this viewpoint, the upbringing and dissemination of high-yielding varieties has been promoted continuously and several modifications in cultural practices, including heavy fertilization, dense planting, and early transplanting, also have been gradually developed. However these changes in cultivation have led to the increased outbreak of insect pests and diseases. And this unexpected results have accelerated the number and complexity of pesticides employed as well as their consumption. Even though pesticides are essential materials contributing to the steady production of agricultural crops, large scale consumption of them has given rise to several adverse impacts, such as mammalian hazard and/or environmental contamination. In this respect, recent development of new pesticides has been concentrated on 'safe pesticide', as it were, that has the highly selective properties without unfavorable side influences on other ecosystem. According to literature cited up to now, feasibilities of safe pesticide development would be summarized as two categories. One of them is the development of chemical pesticides, which include the molecular structure modification of established pesticides for increased safety and synthesis of new safe chemicals which can attack the vulnerable point of physio-ecological characteristics in insect pests and diseases. The other is the biological pesticides which comprise natural enemies and microorganisms to act selectively on confined insect pests and diseases, In addition, improvement of physico-chemical properties of available pesticide formulations would be one of the desirable means for safe pesticide development in view of efficacy enhancement and minimization of hazardous properties or safe pesticide development, various approaches are feasible and needed to study, however, long period and much financial outlay are necessary to develop a new item. And under the present situation in Korea, there are many difficulties for performing research on all the possible routes. Therefore, combined pesticides by the reasonable combination of already registered resticides evaluated as the fairly safe pesticides and safe formulation based on their physico-chemical properties would be developed primarily. And many efforts would be given gradually for the development of new chemical and biological pesticides.

The national wide gravity survey to establish gravity values for the base reference stations in Korea was initiated by the U.S. Army. The Division of Geodesy, U.S. Army Map Service Far East (DG, USAMSFE) conducted two base station surveys in 1961 and 1964, and measured gravity values at 15 stations throughout Korea. Professor Woollard also observed 3 gravity base stations in 1964 as a part of the International Gravity Measurements. All of these surveys were tied directly to DG Base of USAMSFE in Tokyo and Tachikawa Air Force Base stations. GMIK (presently Korea Institute of Energy and Resources) also made 10 base station measurements in 1971, which are tied to USAMSFE base stations established in the previous survey. In a broader sense, all of these measurements are related to Potsdam system whose value is now recognized to be too large by about 14 mgals. In accordance with the International Gravity Standardization Net 1971 (IGSN 71), adopted and recommended by the International Union of Geodesy and Geophysics, GMIK, in cooperation with Institute of Geological Sciences of England, measured gravity values at 15 base reference stations which are tied to IGSN 71 primary base stations in London and Kyoto. The results of this survey are generally lower by about 13.8 mgals than previous values. On the other hand, the National Geography Institute established a fundamental national gravity base reference station in the back yard of the Institute's building and determined the gravity value, which is tied to the IGSN 71 value of the base reference station located in Tokyo. The measurements were made twice in 1975 and 1980 with the cooperation of Japan Geophysical Survey Institute. NGI also established four auxilliary gravity base reference stations in 1980. The author recently measured the gravity difference between two base reference stations located in Korea Institute of Energy and Resources and National Geography Institute and found the measured value is different by more than 1 mgal to that computed from the gravity values adopted by two Institutes. Therefore it is recommended to conduct a more detailed crosscheck to establish consistent base reference values throughout the country.