排序方式： 共有7条查询结果，搜索用时 15 毫秒
1
1.
Research and development at the Children's Television Workshop 总被引：2，自引：0，他引：2
Since its establishment in 1968, the Children's Television Workshop (CTW)—as a matter of policy—has incorporated research into the process of designing and producing educational materials. The first CTW project to use this team approach wasSesame Street, the educational television series created for in-home viewing by preschoolers. Today, the scope of CTW's efforts has widened dramatically to include other media (home video, print, computer software), other learning environments (schools, community organizations, afterschool child-care settings), and other national cultures. This article introduces this issue ofETR&D, which has been authored entirely by CTW researchers, producers, and executives. It describes CTW's approach to research and development, and sets out in broad terms the opportunities and constraints imposed by the environments in which the various projects and productions function. 相似文献
2.
3.
Harold E Hill Richard E. Clark Keith W. Mielke Erhard U. Heidt Wellesley R. Foshay 《Educational technology research and development : ETR & D》1980,28(1):62-74
Anyone who engages in or follows media research knows of the work of Gavriel Salomon. His publications are some of the most
frequently cited in the literature. Advance information about a new book by him prompted us to treat the book more elaborately
than usual. We asked Salomon’s colleague, Dick Clark, to do a review, and Keith Mielke and Erhard Heidt to comment on the
implications of the book for future research in media. — Ed 相似文献
4.
Roland R. Mielke 《Journal of The Franklin Institute》1978,305(3):143-159
Topological analysis of the signal flow graph associated with the hybrid system of equations for a linear active or passive electrical network for which the element admittance matrix exists and is diagonal is considered. First, the term cancellation which occurs in Mason's topological formulas is investigated. Necessary and sufficient conditions on the signal flow graph topology such that a term in the expansion of the graph determinant and cofactors either cancels out with another term in the expansion or does not cancel are established. Properties of the associated network which result in non-cancelling terms are given and the number of non-cancelling terms is determined. Second, new signal flow graph topological formulas for the graph determinant and cofactors are proven. These formulas are such that no term cancellation occurs and are readily adaptable to computer implementation. In addition, the number of terms in these formulas is independent of the network tree used to formulate the signal flow graph. Examples are given to illustrate the new formulas. 相似文献
5.
作为一名校长或者一名从事开发校长培训课程的理论工作者,是否了解本国以及世界各国关于校长工作条件、角色以及校长影响力的情况,至关重要。本文主要论述:欧洲在这个领域的最新发展;欧盟目标,即在拥有49个成员国和更多语种的欧盟,发展一个欧洲学校系统和一个欧洲学校领导模式;国家层面上的校长协会和欧洲层面上的欧洲中小学校长联合会的创建;欧洲中小学校长联合会在把学校领导的利益植入欧洲一体化进程中的地位及其项目;以及教育领导的道德维度。 相似文献
6.
7.
The ability of pigeons to use event durations as remember (R) and forget (F) cues for temporal samples was examined. Pigeons were required to indicate whether a houselight sample stimulus was short (2 sec) or long (6 sec) by pecking a red or a green comparison stimulus. After training with a constant 10-sec delay interval, temporal cues (illumination of the center key) were presented 2 sec after the offset of the temporal samples. For one group, a short (2-sec) temporal cue served as the R cue and a long (6-3ec) temporal cue served as the F cue. This was reversed for a second group of birds. During training, comparison stimuli were always presented following the temporal R cue, but never following the temporal F cue. Tests for the effectiveness of the temporal R and F cues showed that F cues were equally effective in reducing matching accuracy in both groups of birds. It was concluded that pigeons used the duration of the cue to determine whether or not to rehearse the memory code for the temporal sample. 相似文献
1