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   159篇
  免费   2篇
教育   110篇
科学研究   39篇
各国文化   1篇
体育   5篇
信息传播   6篇
  2023年   4篇
  2022年   2篇
  2021年   7篇
  2020年   8篇
  2019年   8篇
  2018年   9篇
  2017年   11篇
  2016年   11篇
  2015年   3篇
  2014年   10篇
  2013年   20篇
  2012年   7篇
  2011年   4篇
  2010年   3篇
  2009年   6篇
  2008年   4篇
  2007年   4篇
  2006年   5篇
  2005年   3篇
  2004年   3篇
  2003年   3篇
  2001年   1篇
  2000年   1篇
  1998年   1篇
  1997年   3篇
  1996年   2篇
  1995年   2篇
  1994年   2篇
  1993年   3篇
  1992年   2篇
  1991年   3篇
  1990年   3篇
  1988年   1篇
  1986年   1篇
  1984年   1篇
排序方式: 共有161条查询结果,搜索用时 15 毫秒
1.
Giving parents a choice with regard to their children's education has been central to the political discourse of school reform at least since the 1988 Education Reform Act (ERA). With regard to children with a Statement of special educational needs (SSEN), a plethora of policies and laws have given parents the right not only to choose a school, but also to appeal to decisions in the best interest of their children. Yet, despite the discourse of school choice, the implementation and practice of such reforms is neither assured nor simple. Participants in this study indicated that they have little choice of suitable provision and are having to compromise either the academic or the social aspects of their child's schooling. This article argues that for many parents whose children have a Statement of SEN, the choice of a school is often a dilemma, as ‘nowhere seems to fit’.  相似文献   
2.
Sialic acid, the end moieties of the carbohydrate chains are biologically important and essential for functions of glycoconjugates and are reported to be altered in cancer patients. Two hundred and twenty five breast cancer (BC) patients, 100 patients with benign breast disease (BBD) and 100 healthy females (controls) were enrolled for the study. Eight hundred and twenty four follow-up samples of 225 breast carcinoma patients were also evaluated. The association of sialic acid forms, sialyltransferase and α-2–6 sialoproteins levels with presence and extent as well as prognosis of breast carcinoma was studied. Serum sialic acid forms and sialyltransferase revealed significantly elevated levels among untreated breast cancer patients as compared to the controls, patients with BBD as well as cancer patients in remission. Non-responders showed comparable levels of the markers with those found in breast cancer patients at the time of diagnosis. Higher levels of sialic acid forms at diagnosis were associated with poor prognosis. A positive correlation between serum levels of different forms of sialic acids and extent of malignant disease was observed. The changes in serum proteins with terminal α-2–6 sialic acid correlated well with alterations in the levels of sialic acid forms and sialyltransferase. Malignant tissues showed elevated levels of sialic acid and sialyltransferase as compared to surrounding normal tissues. The results suggested potential utility of these markers in evaluation of clinical outcome.  相似文献   
3.

Analogical reasoning is increasingly recognized as an important instrument for promoting conceptual change in science learning. This study characterized students' and physicians' spontaneous use of analogies in reasoning about concepts related to the mechanical properties of cardiovascular physiology. The analogies were made in response to questions at different levels of abstraction from basic physiology to clinical problems. The results indicate that analogies generated by subjects facilitated explanations in a number of ways. These include creating coherent representations in novel situations, bridging gaps in understanding, and triggering associations which result in modified explanations. Subjects at different levels of expertise used analogies differently. The more expert subjects used analogies to facilitate articulation and communication; that is, to illustrate and expand on their explanations. Novices and advanced medical students used more between‐domain analogies to explain all categories of questions. This is less evident in physicians' responses to pathophysiological and clinical problems. The paper discusses ways in which analogies can be used productively, and identifies factors that can lead to a counter‐productive use of analogies resulting in misconceptions and erroneous explanations.  相似文献   
4.
Two studies are reported that used multiple measures of creativity to investigate creativity differences and correlates in arts and science students. The first study examined Divergent Thinking fluency, Self-Rated Creativity and Creative Achievement in matched groups of Art and Science students. Arts students scored higher than Science students on two of the three measures. Regression analysis indicated that the educational domain demographic variable was the most consistent predictor of all three measures of creativity. The second study compared natural science, social science and arts students on two performance and two preference measures of creativity, whilst controlling for the effects of general intelligence. Results indicated only Self-Rated Creativity displayed significant group differences, with the regression analysis suggesting a stronger role of personality variables. The differences between the groups and implications for the measurement of creativity are considered.  相似文献   
5.
Cultural Studies of Science Education - While there are many different frameworks seeking to identify what benefits young people might derive from participation in informal STEM (Science,...  相似文献   
6.
This study examined the emotional costs and well-being of postsecondary students with learning disabilities (LD) and attention deficit hyperactivity disorder (ADHD) who faced a sudden shift to emergency remote teaching (ERT) during the COVID-19 pandemic. The study was conducted with 237 postsecondary students in Israel from June to July 2020. With regard to online learning, the LD/ADHD subjects reported significantly higher levels of stress, anxiety, and depression and lower well-being than their neurotypical counterparts. However, no significant differences were found in emotional costs and well-being when the same students had experienced online learning prior to the pandemic. These findings have practical implications for policymakers in academia with regard to the emotional toll of online learning among students with LD/ADHD and their specific needs when facing ERT during the COVID-19 pandemic as well as the contribution of previous online learning when facing ERT.  相似文献   
7.
Electrophoresis plays an important role in many applications, which, however, has so far been extensively studied in Newtonian fluids only. This work presents the first experimental investigation of particle electrophoresis in viscoelastic polyethylene oxide (PEO) solutions through a microchannel constriction under pure DC electric fields. An oscillatory particle motion is observed in the constriction region, which is distinctly different from the particle behavior in a polymer-free Newtonian fluid. This stream-wise particle oscillation continues until a sufficient number of particles form a chain to pass through the constriction completely. It is speculated that such an unexpected particle oscillating phenomenon is a consequence of the competition between electrokinetic force and viscoelastic force induced in the constriction. The electric field magnitude, particle size, and PEO concentration are all found to positively affect this viscoelasticity-related particle oscillation due to their respective influences on the two forces.  相似文献   
8.
Maya  David Schreyer 《收藏》2014,(18):60-67
纸这种柔软洁净的材料,通过人类的双手,在游戏一般的过程中能带来无限种可能的形式。小时候看着大人手中如同变魔术一般出现的纸船、纸飞机、纸衣服慢慢成为遥远而模糊的记忆。相比层出不穷用纸说事儿的那些纸雕塑、纸房子,真有种小巫见大巫的感觉。关键是,这种身怀柔术绝技的材料,还能循环利用,操作起来简便易行,更关键的是,各位满心点子的高手们以纸为师,用各种灵感、材  相似文献   
9.
An extended model based on the theory of planned behaviour (TPB) was used to study Chinese English as a foreign language (EFL) students’ in-class participation. The model included the core TPB constructs (behavioural intentions, attitudes, subjective norms, and perceived behavioural control/self-efficacy) and 2 additional constructs (foreign language classroom anxiety and face-saving) frequently discussed in the literature about Chinese EFL classroom dynamics. A total of 199 Chinese students enrolled in a Sino-American international branch campus were surveyed. The results of a partial least squares (PLS) path modelling analysis revealed that attitudes, subjective norms, perceived behavioural control/self-efficacy, and face-saving explained 46% of the variance in intentions to participate in English in class. Perceived behavioural control/self-efficacy fully mediated the negative indirect effect of foreign language classroom anxiety on intentions. Pedagogical implications and future directions are discussed for implementation purposes.  相似文献   
10.
Oral cancer has emerged as an alarming public health problem with increasing incidence and mortality rates all over the world. Therefore, the implementation of newer screening and early detection approaches are of utmost importance which could reduce the morbidity and mortality associated with this disease. Sensitive and specific biomarkers for oral cancer are likely to be most effective for screening, diagnosis, staging and follow-up for this dreaded malignancy. Unlike other deep cancers, oral cancer is located in oral cavity. Hence, the direct contact between saliva and oral cancer lesion makes the measurement of tumor markers in saliva an attractive alternative to serum and tissue testing. The DNA, RNA and protein molecules derived from the living cancer cells can be conveniently obtained from saliva. Thus, salivary biomarkers, a non-invasive alternative to serum and tissue-based biomarkers may be an effective modality for early diagnosis, prognostication and monitoring post therapy status. In the current post-genomic era, various technologies provide opportunities for high-throughput approaches to genomics and proteomics; which have been used to evaluate altered expressions of gene and protein targets in saliva of oral cancer patients. The emerging field of salivary biomarkers has great potentials to prove its clinical significance to combat oral cancer. Hence, we have reviewed importance of several salivary genomics and proteomics biomarkers for oral cancer.  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