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61.
Europe is gradually embracing freedom of information principles while at the same time restricting dissemination of information generated by public agencies through electronic databases. Both Britain and Germany are moving to adopt freedom of information laws, and the European Commission has published a regulation allowing access to European institution materials. These developments are important for the rest of the world, including the United States, because the Internet is already becoming a vast virtual library facilitating global access to statutes, court decisions, and administrative agency decisions that make up the raw ingredients of a rule of law. Meanwhile, however, the European Commission issued a directive limiting certain uses of electronic databases, broadly enough drafted to include electronic repositories of primary legal information. This kind of state-sponsored monopoly over public information is inimical to a rule of law and democratic values. Europeans and Americans should work to realize the increased transparency promised by the freedom of information developments, and work to minimize the extent to which the database directive and similar proposals on this side of the Atlantic restrict redissemination of primary legal information. 相似文献
62.
Following 602 Chinese twin pairs (48% male, all Han ethnicity) from primarily lower-than-average socioeconomic status families from early to mid-adolescence (Ms = 12 and 15 in 2006 and 2009), this study investigated gene–environment interplay between perceived parental supervision, peer drunkenness, and adolescent alcohol initiation. For alcohol initiation, shared environmental influences were initially negligible but became substantial. Genetic factors largely explained the links between both correlates with alcohol initiation. Parental supervision amplified genetic risks for alcohol initiation in early adolescence but suppressed it in mid-adolescence. Peer drunkenness augmented genetic and environmental influences at both times. Peer drunkenness showed stronger links and moderating potential than parental supervision. Chinese adolescents show dynamic gene–environment interplay patterns involving parent–child and peer processes in alcohol initiation. 相似文献
63.
Zachary Griffen 《Journal of Cultural Economy》2020,13(4):444-460
ABSTRACT Value Added Modeling (VAM) is a statistical technology used to evaluate teacher effectiveness. While it was heralded for years as the next big innovation in education reform, VAM has become an object of legal scrutiny since it was implemented in dozens of states across the U.S. Building on STS findings about science and the law, this paper considers the lawsuits involving VAM as an opportunity to analyze the contestation of expertise in court. It finds that not only is there a great deal of variation in terms of how expertise gets constructed in legal settings, leading to very different outcomes, but also that judges’ assessments of VAM are conducted such that they are implicitly adjudicating what constitutes proper science. Contrary to the idea that judges conform to criteria for evaluating expertise imposed by the scientific community limiting themselves to the inclusion or exclusion of expertise, in the case of VAM the legal system is asserting its own vision of how science should operate and thus making judgments about what counts authentically as science. 相似文献
64.
AbstractIn this study, researchers used basic qualitative research to understand the spaces, resources, and services available to K12 students in their school libraries. Using observation and semi-structured interviews with K12 teacher librarians, this research allowed for a comparison of the K12 and post-secondary environments through which the authors were able to identify similarities and differences in function and service. In this article, the authors explore strategies to ease the transition of K12 students to the college environment, including collaboration between post-secondary and K12 libraries, robust orientation programs, and alignment of information literacy initiatives. This article adds to the body of college readiness literature and suggests avenues for future research. 相似文献
65.
Carol Sansone Tamra Fraughton Joseph L. Zachary Jonathan Butner Cecily Heiner 《Educational technology research and development : ETR & D》2011,59(2):199-212
Successful online students must learn and maintain motivation to learn. The Self-regulation of Motivation (SRM) model (Sansone and Thoman 2005) suggests two kinds of motivation are essential: Goals-defined (i.e., value and expectancy of learning), and experience-defined (i.e., whether interesting). The Regulating Motivation and Performance Online (RMAPO) project examines implications using online HTML lessons. Initial project results suggested that adding usefulness information (enhancing goals-defined motivation) predicted higher engagement levels (enhancing experience), which in turn predicted motivation (interest) and performance (HTML quiz) outcomes. The present paper examined whether individual interest in computers moderated these results. When provided the utility value information, students with higher (relative to lower) individual interest tended to display higher engagement levels, especially when usefulness was framed in terms of personal versus organizational applications. In contrast, higher engagement levels continued to positively predict outcomes regardless of individual interest. We discuss implications for designing optimal online learning environments. 相似文献
66.
Several indices of sexual behavior were characterized for male rats of the Lewis (LEW), Sprague-Dawley (SD) and Fischer (F344)
strains. Males were permitted access to a receptive female of their own strain for five 50-min sessions every fifth day. LEW
males emitted longer latencies (first mount, intromission, ejaculation and post-ejaculatory interval) and lower frequencies
(mounts, intromissions, ejaculations, intromission ratio) relative to F344 males, with the SD strain in general, lying intermediate.
Following this assessment, males of each strain were randomly assigned to females of their own or another strain to ascertain
whether differences were due to differential female receptivity. Although there were no significant differences during this
phase indicative of differential receptivity, the sample size may preclude a definitive interpretation of such results. The
data were discussed in the context of other behavioral differences between the strains and the possible neurobiological mechanisms
underlying these differences. 相似文献
67.
Mental Rotation With Tangible Three‐Dimensional Objects: A New Measure Sensitive to Developmental Differences in 4‐ to 8‐Year‐Old Children 
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下载免费PDF全文 Zachary Hawes Jo‐Anne LeFevre Chang Xu Catherine D. Bruce 《Mind, Brain, and Education》2015,9(1):10-18
There is an emerging consensus that spatial thinking is fundamental to later success in math and science. The goals of this study were to design and evaluate a novel test of three‐dimensional (3D) mental rotation for 4‐ to 8‐year‐old children (N = 165) that uses tangible 3D objects. Results revealed that the measure was both valid and reliable and indicated steady growth in 3D mental rotation between the ages of 4 and 8. Performance on the measure was highly related to success on a measure of two‐dimensional (2D) mental rotation, even after controlling for executive functioning. Although children as young as 5 years old performed above chance, 3D mental rotation appears to be a difficult skill for most children under the age of 7, as indicated by frequent guessing and difficulty with mirror objects. The test is a useful new tool for studying the development of 3D mental rotation in young children. 相似文献
68.
The ability to pump and manipulate fluid at the micron-scale is a basic requirement for microfluidic platforms. Many current manipulation methods, however, require expensive and bulky external supporting equipment, which are not typically compatible for portable applications. We have developed a contactless metal electro-osmotic micropump capable of pumping conductive buffers. The pump operates using two pairs of gallium metal electrodes, which are activated using an external voltage source and separated from a main flow channel by a thin micron-scale polydimethylsiloxane (PDMS) membrane. The thin contactless membrane allows for field penetration and electro-osmotic flow within the microchannel, but eliminates electrode damage and sample contamination commonly associated with traditional DC electro-osmotic pumps that utilize electrodes in direct contact with the working fluid. Our previous work has demonstrated the effectiveness of this method in pumping deionized water. However, due to the high resistivity of PDMS, this method proved difficult to apply towards manipulating conductive buffers. To overcome this limitation, we fabricated conductive carbon black (CB) powder directly into the contactless PDMS membranes. The increased electrical conductivity of the contactless PDMS membrane significantly increased micropump performance. Using a microfluidic T-channel device and an electro-osmotic flow model, we determined the influence that CB has on pump pressure for CB weight percents varying between 0 and 20. The results demonstrate that the CB increases pump pressure by two orders of magnitude and enables effective operations with conductive buffers. 相似文献
69.
Zachary K. Collier 《Structural equation modeling》2017,24(6):819-830
In this article, 3-step methods to include predictors and distal outcomes in commonly used mixture models are evaluated. Two Monte Carlo simulation studies were conducted to compare the pseudo class (PC), Vermunt’s (2010), and the Lanza, Tan, and Bray (LTB) 3-step approaches with respect to bias of parameter estimates in latent class analysis (LCA) and latent profile analysis (LPA) models with auxiliary variables. For coefficients of predictors of class membership, results indicated that Vermunt’s method yielded more accurate estimates for LCA and LPA compared to the PC method. With distal outcomes of latent classes and latent profiles, the LTB method produced the lowest relative bias of coefficient estimates and Type I error rates close to nominal levels. 相似文献
70.
Jennifer J. Hurley Andrea Medici Emily Stewart Zachary Cohen 《Multicultural Perspectives》2013,15(3):160-166
According to the United Nations High Commission for Refugees, the number of refugees worldwide was 10.5 million in 2009 and this number continues to grow (United Nations Refugee Agency, 2010). There is a shortage of evidence based practices and information regarding the state of service provision for young refugee children and their families in preschool programs. In this qualitative study, 25 early childhood educators participated in semi-structured interviews to illuminate the experiences of teachers as they work with preschool children and families in a small New England refugee resettlement community. Themes identified were barriers and facilitators related to two main categories of communication issues and cultural complexities. Implications for future research, teacher preparation programs, professional development and early childhood programs are discussed. 相似文献