首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   632篇
  免费   21篇
各国政治   43篇
工人农民   48篇
世界政治   57篇
外交国际关系   52篇
法律   261篇
中国政治   4篇
政治理论   185篇
综合类   3篇
  2021年   3篇
  2020年   5篇
  2019年   11篇
  2018年   15篇
  2017年   21篇
  2016年   23篇
  2015年   10篇
  2014年   19篇
  2013年   127篇
  2012年   16篇
  2011年   15篇
  2010年   14篇
  2009年   12篇
  2008年   23篇
  2007年   24篇
  2006年   25篇
  2005年   27篇
  2004年   19篇
  2003年   17篇
  2002年   11篇
  2001年   10篇
  2000年   10篇
  1999年   15篇
  1998年   4篇
  1997年   10篇
  1996年   5篇
  1995年   10篇
  1994年   9篇
  1993年   6篇
  1992年   6篇
  1991年   6篇
  1990年   5篇
  1988年   9篇
  1987年   9篇
  1986年   7篇
  1985年   12篇
  1984年   9篇
  1983年   7篇
  1982年   6篇
  1981年   7篇
  1980年   3篇
  1979年   5篇
  1978年   5篇
  1976年   5篇
  1975年   4篇
  1974年   4篇
  1973年   4篇
  1972年   5篇
  1967年   3篇
  1965年   3篇
排序方式: 共有653条查询结果,搜索用时 31 毫秒
101.
102.
School choice is often identified with right-leaning, voucher-happy, market-oriented public school systems like those found in the United States. Thus, the proposition that a social democratic state such as South Africa will offer many primary and secondary school learners far greater choice strikes many as counter-intuitive and implausible. The authors demonstrate that the three major pieces of education framework legislation—National Education Policy Act (NEPA), South Africa Schools Act (SASA) and Employment of Educators Act (EEA)—conspire with recent historical events and deep political and constitutional commitments to create South Africa's unintended experiment in school choice.

The authors emphasize that the legal framework created by legislation and regulation are necessary but not sufficient conditions—they prefer to call them enabling conditions—for the creation of quasi-markets in schools. The generation of quasi-markets in schools depends on several other factors required for all markets. The absence of many of these features in much of South Africa explains why the majority of South African learners do not have access to quasi-markets in schools. The absence of such features is largely a function of apartheid's legacy of deeply entrenched patterns of inequality in primary and secondary schooling.

Having demonstrated that historical, political, legal and economic conditions had the unintended consequence of producing school choice—and that school choice was not the result of the state's adoption of a conscious and deliberate policy—the authors examine the state's response to this de facto policy. The authors remain agnostic as to the desirability of the de facto policy and conclude with an exploration of some of the primary critiques of choice in South Africa. While they dismiss the ‘political’ critiques as largely facile, the available empirical evidence suggests the limited systemic benefits and the potentially deleterious consequences for the poorest of the poor who reside in areas where quasi-markets exist. The state's current ‘conscious’ attempts to re-engineer a modest mixed model, that emphasizes access to existing quasi-markets—and thus exploits superior existing school stock for the benefit of learners from historically disadvantaged communities—and that shifts public resources to those schools in the greatest need, accords with what little we know about the advantages and disadvantages of choice.  相似文献   

103.
In 2005 a Legislation Review Committee, known as the Lockhart Review, undertook a review of the Commonwealth legislation regulating human embryo research. The report that emanated from the review was released in December 2005. If the report recommendations are implemented by the Federal Government, Australian scientists will be permitted to create human embryo entities currently known as "human embryo clones" by the process known as somatic cell nuclear transfer to develop stem cell lines for research purposes. Many argue that stem cells have the potential to be developed into valuable medical therapies that could assist with, or cure, serious diseases such as Type 1 diabetes and Parkinson's disease. This article analyses the evidence presented to the Lockhart Review and the report recommendations. It assesses where the Lockhart recommendations would place Australia in terms of worldwide embryo research. It is argued that the Federal Government should fully embrace the recommendations so that Australia can progress stem cell research to its fullest potential.  相似文献   
104.
Dr. Portnoy, a former senior clinical reviewer and manager for the FDA's Center for Devices and Radiological Health, provides guidance for determining acceptable practices for the claims, content, and appearance of advertising and promotional materials for medical devices. In the course of doing so, he discusses important regulatory and legal precedents, and provides examples of successful and problematic advertising and promotion strategies including those that resulted in FDA Warning Letters, enforcement activities, and in some cases, monetary and criminal penalties.  相似文献   
105.
Sharp declines in welfare rolls since the passage of welfare reform legislation have led many to label it a social policy success. Using data from prereform and postreform samples of welfare applicants and recipients, as well as ethnographic data on welfare reform implementation, we examine three hypotheses based on concerns raised during the welfare reform debate about the possible effects of new policies on substance abusers and addicts: First, they would be "scared off," or discouraged from applying to aid by welfare's new requirements surrounding work and treatment. Second, they might be "weeded out," or face discrimination in the application process because of concerns about the difficulty of moving them successfully from welfare to work. Third, they might be "bumped down," or shifted to local aid programs rather than moving from welfare to self-sufficiency. Our empirical analysis finds no evidence of scaring off or weeding out, and some evidence of bumping down. Using ethnographic data, we offer some possible explanations for these findings by placing them in the context of policy change and implementation in the years following welfare reform.  相似文献   
106.
The purpose of this study was to determine the performance characteristics of the Cozart Amphetamine Microplate EIA for detecting amphetamine in oral fluid. Oral fluid samples were collected using the Cozart RapiScan Collection System from 135 volunteer donors from drug treatment clinics. A further 35 oral fluid samples were collected from volunteer donors who were not drug users. The samples were analyzed in the laboratory using the Cozart Amphetamine Microplate EIA and confirmed using gas chromatography-mass spectrometry (GC-MS). The samples were stored frozen until analysis by GC-MS. The intra-assay precision for the Cozart Amphetamine Microplate EIA for amphetamine in oral fluid over forty assays was 2.74-7.1% CV (within assay) and 3.4-7.0% CV (within day). A total of 78 samples were positive for various amphetamines and related designer drugs. The Cozart Amphetamine Microplate EIA, using a cutoff of 45 ng/ml amphetamine equivalents in neat oral fluid, had a sensitivity of 91.7+/-3.3% and a specificity of 95.9+/-1.9% versus GC-MS using a cutoff of 30 ng/ml. A series of potential adulterants of oral fluid were evaluated and shown not to alter the outcome of the test result.  相似文献   
107.
Rationalism in management science tends to mean attempting to determine the benefits and costs of the alternative decisions under consideration, and then picking the one that is best on benefits minus costs. Incrementalism tends to mean determining the decisions that actually get made under various circumstances, and then working with those existing decision rules as the basis for making adjustments to consider special or changing circumstances. Those two approaches can be well illustrated with the problem of attempting to determine what criminal sentences should be legislated to cover given crimes and prior records. The analysis tends to show that a rationalist approach is more effective in achieving societal goals when (1) alternative policies can be meaningfully related to those goals, and (2) existing decisions reflect individual goals which are generally in conflict with societal goals. An incrementalist approach is more effective when either of those criteria is absent, which is so when seeking to arrive at legislatively determined nondiscretionary criminal sentencing.  相似文献   
108.
109.
The growth of the planning function of government raises the question of how planning can be accomplished by democratic means. A new technological device—the teaching computer—seems to be ideally suited for disscussions between experts and the public on issues of medium and long-range planning. The teaching computer can be thought of as a mass communications system with feedback.The author wishes to acknowledge research support from the Program on the Social Implications of Science and Technology at the University of Illinois under National Science Foundation grant GR-60. The research described is being carried out through the Institute of Communications Research. The facility being used is located at the Computer-based Education Research Laboratory of the University of Illinois which is supported in part by the National Science Foundation under grant GF-81 and the Advanced Research Projects Agency under grant ONR-Nonr 3985 (08). This paper was presented at the second International Future Research Conference held in Kyoto, Japan, April 10–16, 1970.  相似文献   
110.
There are two approaches to predicting election outcomes: (1) a historical approach, which uses past election results alongside macroeconomic and political variables to forecast election results up to a year in advance, and (2) a campaign-oriented approach, which uses current campaign trends to forecast vote shares at the end of the campaign. They are in some way at odds—one approach says the campaign doesn't matter, the other focuses entirely on the campaign. This article considers whether the two approaches might be usefully combined; it considers whether the prediction errors in historical models may be related to trends during the campaign. That possibility is tested here using 17 elections in the US, UK and Canada, combining historical predictions and automated content analyses of campaign-period media content. Results suggest that campaigns do not account for errors in the historical predictions; but there may be other ways in which campaigns matter in conjunction with historical models.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号