• Journal of the Korean association of regional geographers
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• v.2 no.1
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• pp.51-67
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• 1996

There are three main rice-growing regions in the United States: the prairie region along the Mississippi River Valley in eastern Arkansas; the Gulf Coast prairie region in southwestern Louisiana and southeastern Texas; and the Central Valley of California. The Central Valley of California is producing about 23% of the US rice(Fig. 1). In California. most of the crop has been produced in the Colusa, Sutter, Butte, Glenn Counties of the Sacramento Valley since 1912, when rice was commercially grown for the first time in the state(Fig. 2). Roughly speaking, the average annual area sown to rice in California is about 300,000 acres to 400,000 acres during the last forty years(Fig. 3). California rice is grown under a Mediterranean climate characterized by warm, dry, clear days, and a long growing season favorable to high photosynthetic rates and high rice yields. The average rice yield per acre is probably higher in California than in any other rice-growing regions of the world(Fig. 4). A dependable supply of irrigation water must be available for a successful rice culture. Most of the irrigation water for California rice comes from the winter rain and snow-fed reservoir of the Sierra Nevada mountain ranges. Less than 10 percent of rice irrigation water is pumped from wells in areas where surface water is not sufficient. It is also essential to have good surface drainage if maximum yields are to be produced. Rice production in California is highly mechanized, requiring only about four hours of labor per acre. Mechanization of rice culture in California includes laser-leveler technology, large tractors, self-propelled combines for harvesting, and aircraft for seeding, pest control, and some fertilization. The principal varieties grown in California are medium-grain japonica types with origins from the cooler rice climates of the northern latitudes (Table 1). Long-grain varieties grown in the American South are not well adapted to California's cooler environment. Nearly all the rice grown recently in California are improved into semidwarf varieties. Choice of variety depends on environment, planting date, quality desired, marketing, and harvesting scheduling. The Rice Experiment Station at Biggs is owned, financed, and administered by the rice industry. The station was established in 1912, as a direct result of the foresight and effort of Charles Edward Chambliss of the United States Department of Agriculture. Now, The station's major effort is the development of improved rice varieties for California.

• Journal of Elementary Mathematics Education in Korea
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• v.20 no.2
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• pp.239-257
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• 2016

The Common Core States Standards was developed by building on the best state standards in the U.S.; examining the expectations of other highperforming countries around world; and carefully studying the research and literature available on what students need to know. The Common Core States Standards for Mathematics are reshaping the teaching and learning of mathematics in California classroom using the California Common Core States Standards for Mathematics(CA CCSSM). The aim of this study is to observe CA CCSSM. The CA CCSSM were established to address the problem of having a curriculum that is 'a mile wide and an inch deep'. And it have two types of standards. One is standards for mathematical practice which are the same at each grade level, the other is standards for mathematical content which are different at each grade level. This study focused on standards for mathematical content, in particular, on Geometry domain in elementary level, using Mathematics Framework for California Public Schools.

• Korean Journal of Comparative Education
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• v.28 no.4
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• pp.23-49
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• 2018

This study aims to consider the subject completion system based on high school credit system in State of California. To achieve research aims, this study analyzed a characteristics of curriculum of credit system in US, subject completion system based on high school credit system in State of California. Based on analysis results, this study search implications for implementing high school credit system in korea. For stable implement of High School Credit System, This study proposed that 'review of relevance of graduation requirement credit', 'effort in Metropolitan and Provincial office of education and School for establishing meaningful subject', 'taking follow-up action in accordance with setting of subject completion standard', 'qualitative improvement of student's subject selection', 'revitalization of career coaching for meaningful subject selection', 'setting of level on connectivity between high school curriculum and university entrance examination', 'a study on the in-depth follow-up about high school curriculum based credit system in foreign country'.

• JOURNAL OF ELECTRICAL WORLD
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• s.356
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• pp.56-57
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• 2006

• Journal of the korean veterinary medical association
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• v.33 no.2
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• pp.101-103
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• 1997

• JOURNAL OF ELECTRICAL WORLD
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• s.292
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• pp.57-63
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• 2001

• The Bimonthly Magazine for Agrochemicals and Plant Protection
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• v.1 no.7
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• pp.50-54
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• 1980

• 베이커리
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• no.11 s.448
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• pp.86-88
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• 2005

• Water for future
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• v.42 no.11
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• pp.59-70
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• 2009

• Proceedings of the Korea Contents Association Conference
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• 2013.05a
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• pp.179-180
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• 2013

범죄예방이 무엇보다 중요한 형사정책의 한 축으로 자리매김 하면서 경찰활동도 다양한 변화를 추구하고 있다. 근세 이후 범죄통제경향의 변화에서도 알 수 있듯, 종국적으로는 범죄예방이 범죄통제의 최선이라는 경험을 바탕으로 경찰의 역할에 대한 새로운 시각의 등장과 더불어 나타난 것이 오늘날의 지역사회경찰활동이다. 이와 같은 경찰의 지역사회활동과 관련하여 본 연구는 미국 캘리포니아 북부에 위치한 산마테오카운티 보안관실의 C.A.R.O.N프로그램에 대하여 살펴보고자 한다.