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利用矢量可以简明地把基本的几何对象表示出来,并通过矢量的某些运算解决许多几何问题,矢量方法与坐标方法相结合能够较为简捷地把形的问题转化为数的问题. 相似文献
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Darlene H. Anderson Scott M. Trinh Paul Caldarella Blake D. Hansen Michael J. Richardson 《Early Childhood Education Journal》2018,46(5):487-496
Students who experience social withdrawal and anxiety (internalizing difficulties) are often overlooked in schools due to the covert nature of their symptoms. The literature lacks empirically supported preventive approaches for kindergarten students who are socially withdrawn and behind their peers in developing social skills. Furthermore, research suggests that parents often are not adequately involved in interventions during this critical period of social development. In response to this need, a school-based intervention was implemented to increase the positive social interaction of three kindergarten students on the playground. Treatment consisted of (a) social skills training, (b) adult mediation, (c) self-evaluation and reinforcement, and (d) parent involvement through home notes. The effects of this intervention were assessed on the playground during recess using partial interval recording of target students’ positive interactions. During implementation of the intervention, all target students demonstrated improvements in social interaction. Future studies should investigate whether addressing the limitations of this study would yield stronger results with this underserved population. 相似文献
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Craig Locatis Eldon Ullmer Victor Carr Richard Banvard Quang Le Raulie Lo Matthew Williamson 《Educational technology research and development : ETR & D》1992,40(2):77-82
A study of authoring system technology was done to update a previous study done in 1985. While the earlier study focused on
software selection methods, the current one emphasizes trends in authoring tool characteristics, vendor approaches to the
market-place, and evaluation methods. It also raises questions about some of the often tacit assumptions underlying the technology's
development and use. 相似文献
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Andrei L. Turinsky Elena Fanea Quang Trinh Stephen Wat Benedikt Hallgrímsson Xiaoli Dong Xueling Shu Julie N. Stromer Jonathan W. Hill Carol Edwards Brenda Grosenick Masumi Yajima Christoph W. Sensen 《Anatomical sciences education》2008,1(1):10-18
The authors have created a software system called the CAVEman, for the visual integration and exploration of heterogeneous anatomical and biomedical data. The CAVEman can be applied for both education and research tasks. The main component of the system is a three‐dimensional digital atlas of the adult male human anatomy, structured according to the nomenclature of Terminologia Anatomica. The underlying data‐indexing mechanism uses standard ontologies to map a range of biomedical data types onto the atlas. The CAVEman system is now used to visualize genetic processes in the context of the human anatomy and to facilitate visual exploration of the data. Through the use of Java? software, the atlas‐based system is portable to virtually any computer environment, including personal computers and workstations. Existing Java tools for biomedical data analysis have been incorporated into the system. The affordability of virtual‐reality installations has increased dramatically over the last several years. This creates new opportunities for educational scenarios that model important processes in a patient's body, including gene expression patterns, metabolic activity, the effects of interventions such as drug treatments, and eventually surgical simulations. Anat Sci Ed 1:10–18, 2008. © 2007 American Association of Anatomists. 相似文献
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Trinh Nguyen Hanna Schleihauf Melanie Kungl Ezgi Kayhan Stefanie Hoehl Pascal Vrtička 《Child development》2021,92(4):e565-e580
Interpersonal neural synchrony (INS) has been previously evidenced in mother–child interactions, yet findings concerning father–child interaction are wanting. The current experiment examined whether fathers and their 5- to 6-year-old children (N = 66) synchronize their brain activity during a naturalistic interaction, and addressed paternal and child factors related to INS. Compared to individual problem solving and rest, father–child dyads showed increased INS in bilateral dorsolateral prefrontal cortex and left temporo-parietal junction during cooperative problem solving. Furthermore, the father’s attitude toward his role as a parent was positively related to INS during the cooperation condition. These results highlight the implication of the father’s attitude to parenting in INS processes for the first time. 相似文献
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The present study tests the assumption that peers wield sufficient influence to induce sexual homophily (i.e., similarities in sexual experiences). Because girls face greater stigma for their sexual experiences than do boys, sexual homophily may be greater in girls' friendship networks than in boys'. Stochastic actor-based models were used to analyze network data (n = 2,566; ages 14–18) from two high schools in the National Longitudinal Study of Adolescent to Adult Health. Sexual homophily was present in friendship networks. Girls and boys were equally susceptible to their friends' influence, but the former exhibited a stronger preference for befriending same sexual debut status peers than the latter. The findings suggest that adolescents—particularly girls—“curate” their networks to minimize peer ostracism. 相似文献
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介绍松下电工最新PLC产品FPΣ的特点以及PC-LINK通信网在电梯控制系统中的应用。采用PLC远程控制的电梯,可以节省大量的电缆材料,给电梯维护和传统的电梯改造提供了方便。采用通信网络技术的电梯控制对于我国中小型电梯企业具有普遍推广的价值。 相似文献
8.
Jean-Christophe Castella Joep Slaats Dang Dinh Quang François Geay Nguyen Van Linh Pham Thi Hanh Tho 《The Journal of Agricultural Education and Extension》2013,19(2):109-125
Abstract In Vietnam, agricultural extension has contributed to rural development and poverty alleviation over the past two decades of agricultural decollectivization, but it was not very effective in reducing disparities within farmer communities. The study examined how better interactions of extension services with other agencies and information sources may help marginal farmers in catching up with the general improvement of living conditions in a mountainous area in northern Vietnam. It combined three complementary viewpoints on this issue: that of the agricultural extension staff, that of farmers and that of development experts with a long working experience in the mountains of Vietnam. The analysis of existing structures and functions of the extension system revealed a number of obstacles to the participation of marginal farmers in extension programmes and helped to identify relevant domains of intervention. 相似文献
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Frequent requests from users to search engines on the World Wide Web are to search for information about people using personal names. Current search engines only return sets of documents containing the name queried, but, as several people usually share a personal name, the resulting sets often contain documents relevant to several people. It is necessary to disambiguate people in these result sets in order to to help users find the person of interest more readily. In the task of name disambiguation, effective measurement of similarities in the documents is a crucial step towards the final disambiguation. We propose a new method that uses web directories as a knowledge base to find common contexts in documents and uses the common contexts measure to determine document similarities. Experiments, conducted on documents mentioning real people on the web, together with several famous web directory structures, suggest that there are significant advantages in using web directories to disambiguate people compared with other conventional methods. 相似文献