Parental racial socialization as a moderator of the effects of racial discrimination on educational success among african american adolescents     

Wang MT  Huguley JP 《Child development》2012,83(5):1716-1731

This study investigated whether parental racial socialization practices moderated the relation between racial discrimination in school and adolescents’ educational outcomes. Using data from a longitudinal study of an economically diverse sample of 630 African American adolescents (mean age = 14.5) from a major East Coast metropolis, the results revealed that cultural socialization attenuated the effect of teacher discrimination on grade point average (GPA) and educational aspirations, as well as the effect of peer discrimination on GPA. Also, preparation for bias and cultural socialization interacted to make unique contributions to African American adolescents’ educational outcomes. Finally, there was some evidence that teacher discrimination was more detrimental to the academic engagement of African American males than females. Implications for research and practice are discussed.  相似文献   

我国网络舆情信息工作现状及对策思考     

戴维民  刘轶 《图书情报工作》2014,58(1):24-29

当前我国网络舆情发展呈现如下态势：舆情热点事件不断攀升、各种社会思潮网上争鸣、网络信息管理渐入法制性轨道、社交媒体的链式传播趋于独立。在“三位一体”的互联网信息管理工作格局下,我国舆情信息工作形成了纵向、横向与协作的网格状运行体系。在新形势下,我国网络舆情信息工作面临诸多挑战,如舆情信息协调不畅,舆情工作发展不平衡,舆情信息分析不准确,舆情研判市场不规范等。由此,建议加强网络舆情工作者的政治素养培育,完善网络舆情工作机制建设,拓展网络舆情工作科学研究领域。  相似文献   

个人科研信息空间相关研究综述     

包冬梅  戴维民 《数字图书馆论坛》2012,(5):2-9

通过对文献与相关软件产品的调研,将与个人科研信息空间相关的国内外研究内容分为以下几个方面进行综述：（1）学术科研的大环境—虚拟科研环境的研究;（2）数字环境下科研流程（研究活动生命周期）方面的研究;（3）有关学术科研人员科研信息需求、科研信息行为的研究;（4）个性化信息服务方面的理论和实践研究;（5）个人信息管理方面的研究等。  相似文献   

Structural changes of oviduct of freshwater shrimp, Macrobrachium nipponense （Decapoda, Palaemonidae）, during spawning     

Lu JP  Zhang XH  Yu XY 《Journal of Zhejiang University. Science. B》2006,7(1):64-69

The structural change of the oviduct of freshwater shrimp （Macrobrachium nipponense） during spawning was examined by electron microscopy. The oviduct wall structural characteristics seem to be influenced significantly by the spawning process. Before the parturition and ovulation, two types of epithelial cells （types Ⅰ and Ⅱ） are found in the epithelium. The free surfaces of type Ⅰ and type Ⅱ cells have very dense long microvilli. Under the type Ⅰ and type Ⅱ cells, are a relatively thick layer of secreting material and a layer of mostly dead cells. After ovulation, two other types of epithelial cells （types Ⅲ and Ⅳ） are found in the oviduct wall epithelium. The free surface of type Ⅲ cells only has short microvilli scattered on the surface. The thick layer with secreting material and the dead cell layer disappeared at this stage. In some type Ⅲ cells, the leaking out of cytoplasm from broken cell membrane led to the death of these type Ⅲ cells. The transformation of all four types of epithelial cells was in the order： Ⅳ→Ⅰ→Ⅱ→Ⅲ.  相似文献   

Moving toward a grand theory of development: in memory of Esther Thelen     

Spencer JP  Clearfield M  Corbetta D  Ulrich B  Buchanan P  Schöner G 《Child development》2006,77(6):1521-1538

This paper is in memory of Esther Thelen, who passed away while President of the Society for Research in Child Development. A survey of Esther Thelen's career reveals a trajectory from early work on simple movements like stepping, to the study of goal-directed reaching, to work on the embodiment of cognition, and, ultimately, to a grand theory of development--dynamic systems theory. Four central concepts emerged during her career: (1) a new emphasis on time; (2) the proposal that behavior is softly assembled from the interaction of multiple subsystems; (3) the embodiment of perception, action, and cognition; and (4) a new respect for individuality. Esther Thelen communicated these ideas to scientists and practitioners alike, so the ultimate benefactors of her work were children.  相似文献   

21世纪信息管理人才培养目标与模式   总被引：8，自引：1，他引：7  

戴维民 《文献工作研究》1999,12(1):1-6

  相似文献   

A simple and effective method for total RNA isolation of appressoria in Magnaporthe oryzae     

Liu TB  Lu JP  Liu XH  Min H  Lin FC 《Journal of Zhejiang University. Science. B》2008,9(10):811-817

Appressorium formation is an important event in establishing a successful interaction between the rice blast fungus, Magnaporthe oryzae, and its host plant, rice. An understanding of molecular events occurring in appressorium differentiation will give new strategies to control rice blast. A quick and reliable method to extract total RNA from appressorium is essential for studying gene expression during appressorium formation and its mechanism. We found that duplicate film is an efficient substratum for appressorium formation, even when inoculated with high density conidia. When inoculated with conidia at 1×106ml-1, the percentages of conidium germination and appressorium formation were (97.98±0.67)% and (97.88±0.45)%, respectively. We applied Trizol before appressorium collection for total RNA isolation, and as much as 113.6 pg total RNA was isolated from the mature appressoria at 24 h after inoculation. Functional analysis of two genes, MNH6 and MgATG1, isolated from the cDNA subtractive library, revealed that the quantity of RNA was good enough to construct a cDNA (complementary DNA) library or a cDNA subtractive library. This method may be also applicable for the appressorium RNA isolation of other pathogenic fungi in which conidia differentiate into appressoria in the early stages of host infection.  相似文献