共查询到18条相似文献,搜索用时 93 毫秒
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概述水环境中各种病原体的污染状况和危害。提出发展病原体的近代检测技术、保护水源和强化水处理技术等方面的设想。 相似文献
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基于海量数据资源的挖掘和应用催生的大数据产业,是新一代信息领域的重点产业及大数据时代的基础支撑产业,是全球下一个发展创新、角力竞争、提高生产力的战略性产业。目前,国内外大数据产业标准和产业格局尚未形成,这是广州促进大数据产业跨越发展的难得机会。广州应借鉴美国等发达国家经验,把握大数据时代到来的机遇,高度重视和超前谋划,整合资源合力加快广州大数据产业跨越发展,抢占战略性新兴产业发展的制高点。 相似文献
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2004年2月,美国布什政府提出旨在中东国家推动政治、经济、社会改革的“大中东倡议”(下称倡议),又被外界称为“大中东民主改革计划”,认为是“冷战后最雄心勃勃”的计划。所谓大中东,是指22个阿拉伯国家和土耳其、以色列、阿富汗、巴基斯坦,但主要针对的是阿拉伯国家,将以色列、 相似文献
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《Africa Research Bulletin: Political, Social and Cultural Series》2006,43(4):16626C-16626
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Tamir Levy 《Journal of Economic Psychology》2011,32(3):374-383
Health related research documents that air pollution has negative mood effects. Experimental works in psychology relate bad mood to increased risk aversion. Studies in financial economics report an observed link between mood effects and stock market returns. This study therefore investigates whether the mood effects caused by air pollution can have economic implications. It examines the relationship between air pollution and stock returns using data from the Air Quality Index, and stock returns from four stock exchanges in the US. We find that air pollution is negatively related to stock returns, even when controlling for other variables. The relationship becomes weaker as the distance of the stock exchange from the polluted area increases. The results also indicate that air pollution may even affect local traders investing in securities exchanges located far from the polluted area. The findings imply that a profitable trading strategy can be constructed. 相似文献
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Carlos Gradín 《Journal of Economic Inequality》2013,11(4):473-493
We analyze the role of the demographic and human capital characteristics of minorities in the US in explaining their high occupational segregation with respect to whites and the extent to which they are locked into low-paying jobs. We measure conditional segregation based on an estimated counterfactual distribution in which minorities are given the relevant characteristics of whites. Our results show that the different levels of attained education by ethnicity and race explain a substantial share of occupational segregation among non-whites in the US, while English skills or immigration status are especially relevant for explaining segregation among Hispanics and Asians. 相似文献
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Despite a slight increase in the labor force participation rate of women age 18–55 in the U.S. between 1990 and 2010, the labor force participation rate of military wives in this age cohort fell from 63 to 57?%. The goal of this paper is twofold: to document and analyze the labor force participation of military wives between 1990 and 2010, using the U.S. Census and American Community Survey data, and to compare the relationship between migration and labor force participation for military and non-military wives. We find that the primary suspects to explain the widening gap are the repeated migration for military wives, and the deepening of the recession. 相似文献
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This paper uses the pooled data from 2005 to 2009 American Community Survey to analyze the economic benefits associated with bilingualism for adult men born in the United States. Bilingualism among the native born is defined as speaking a language at home other than or in addition to English. Native born bilingualism is rare; only 6.5% report a non-English language, and of those 71% report Spanish. Most of the native-born bilinguals report speaking English “very well” (85%), with most of the others speaking it “well” (10%). Other variables the same, overall bilinguals earn 4.7% less than monolingual English speakers, but the earnings differential varies sharply by the language spoken. Those who speak Native American languages, Pennsylvania Dutch and Yiddish have very low earnings due to a tendency to live in geographic or cultural enclaves. Spanish speakers earn 20% less than the monolingual English speakers overall, and other variables the same, have statistically significant 7% lower earnings. On the other hand, those who speak certain Western European and East Asian languages and Hebrew earn significantly more than monolingual English speakers. 相似文献
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This article reviews the recent literature that has incorporated critical race theory to study migration. It includes a survey of the uses, approaches, and contributions of critical race theory in the field of migration. Immigration studies have historically/traditionally focused on demographic aspects of population movements, leaving virtually outside of its analysis social processes at the core of migration, like the social construction of race and citizenship. This disconnect is troubling in the current context of globalization, where specific migrant populations have become target of specific forms of violence on the basis of their racialization. Workplace raids, midnight searches, city ordinances, and changes in social services legislation, to name a few, are consistently used against specific groups to perpetuate their oppression and subordination, becoming in a sense new forms of state sponsored violence. This article begins by outlining major CRT concepts and frameworks used in legal scholarship on immigration. Next, we identify emerging themes generated by this approach by highlighting research questions and operationalization of the CRT framework. Thirdly, we highlight areas of distinction to mainstream sociology in US scholarship. 相似文献