Generating functions for powers of second-order recurrence sequences     

王晓霞  李梅 《上海大学学报(英文版)》2011,15(6):517-521

For the sequences satisfying the recurrence relation of the second order,the generating functions for the products of the powers of these sequences are established.This study was from Carlita and Riordan who began a study on closed form of generating functions for powers of second-order recurrence sequences.This investigation was completed by Stnica.Inspired by the recent work of Istva'n about the non-closed generating functions of the products of the powers of the second-order sequences,the authors give s...  相似文献   

教育网站评价的网络计量模式初探     

曹梅 《开放教育研究》2011,17(5)

目前,教育网站评价中普遍存在主观多客观少、静态多动态少的问题,因此,引入新的评价模式增强教育网站评价的动态性和客观性成为必然的选择.Alexa排名在网站评价中的广泛应用,使得教育网站评价的网络计量模式开始走进实践和理论研究的视野.本文从网络计量模式的内涵、各种网络计量指标及其评价意义、网络计量模式的实施方法等三个方面详细阐述了网络计量模式在教育网站评价中的应用框架,文章最后还讨论了实施教育网站网络计量评价可能遇到的问题以及后续研究工作.  相似文献   

基于AHP电子商务网站建设中技术指标的评价     

林玫  陈涵 《宁波职业技术学院学报》2011,(5):53-55

在《电子商务网站建设与维护》课程教学过程中,运用AHP（Analytic Hierarchy Process）的评价方法,对技术评价指标进行量化。通过对评价结果的比较,以达到学生掌握电子商务网站建设中涉及的技术因素以及了解其重要性的初衷和目的。  相似文献   

Vicarious learning from dialogue and discourse     

Richard Cox  Jean Mckendree  Richard Tobin  John Lee  Terry Mayes 《Instructional Science》1999,27(6):431-458

This study examined learning in the domain of sentence parsing and syntax treediagram construction. The aim of the study was to assess whether subjects could learn vicariously from recordings of interactions between a previous student and a tutor.Four intervention conditions and a control condition were compared. Subjects in a dialogue group (DL) read printed tutorial notes and subsequently vicariously viewed dynamic (animated) recordings of tree diagrams being constructed by a previous student in the presence of a tutor.The discourse (DI) condition was similar except that subjects viewed recordings of tree diagrams being constructed by a tutor who concurrently verbalised instructional discourse.In a third condition (DO), subjects viewed tree-diagram construction animation clips which were not annotated with either dialogue or discourse. In a linear text (LT) condition, subjects were given only printed tutorial notes. A control (CO) condition involved pre and post testing without any intervention.Results indicated that the dialogue condition was as effective as the discourse condition. This provides support for contention that re-usable dialogue is a useful resource for the vicarious learner. Another finding was that un-annotated animated diagrams were surprisingly effective. Several reasons for their effectiveness are suggested from the literature on instructional animations.  相似文献   

The Effects of a Kit-Based Science Curriculum and Intensive Science Professional Development on Elementary Student Science Achievement     

Betty J. Young  Sharon K. Lee 《Journal of Science Education and Technology》2005,14(5-6):471-481

The science achievement of 226 5th graders from districts that have a kit-based inquiry science curriculum supported by intensive professional development (PD) is compared with data from a group of 173 5th graders from other districts that use nonkit science materials and do not have systematic science PD for teachers. Within the kit-based project, the sample of project teachers is stratified to select teachers with a high number of science PD hours versus those with few hours. While there were no significant differences in the mean total scores for kit-based students with low PD versus high PD teachers, the kit-based classrooms scored significantly higher than students in nonkit classrooms on both the pretest and posttest, though there were significantly more minutes of science instruction in the nonkit classrooms. Finally, nonkit teachers taught more units of shorter length and reported lower levels of preparedness to use reform pedagogical approaches.  相似文献   

Youth and culture: A seventeen nation study of perceived problems and coping strategies     

Janice T. Gibson  Marvin J. Westwood  F. Ishu Ishiyama  William A. Borgen  Susan M. Showalter  Qasem Al-Sarraf  Semiha A. Atakan  Isaura R. F. Guimares  A. Lina Guisti-Ortiz  Margaret Robertson  Benjamin Shafrir  Peter De Weerdt  Gundelina A. Velazco  Carol E. Baker  Maria Dikaiou  Tatiana Gabay  Lina Kashyup  Ilona Lee  Maria E. Felce Di Paula  Hillman Ngunangwa  Nina F. Talyzina 《International journal for the advancement of counseling》1991,14(3):203-216

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Exploring Race Consciousness among South Korean College Students through Sport     

Yomee Lee 《Quest (Human Kinetics)》2020,72(3):338-357

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Patterns of Social Interaction of Mainstreamed Preschool Children: Hopeful News from the Field     

Nancy Herink  Patrick C. Lee 《International Journal of Disability, Development & Education》1985,32(3):191-199

Much of the research on social interaction in mainstreamed settings has focused on “reverse mainstreamed” or special environments in contrast, the present study observed 600 social interactions in 19 regular preschools. Three findings emerged: a) retarded children are substantially integrated into the emotional and social life of the peer group, but not fully integrated into peer group verbal life; b) there is an inverse relationship between teachers’ initiation of social interaction with retarded children and the degree to which the latter are integrated into peer group life; and c) teachers provide retarded children with more verbal enrichment and emotional protection than these children receive from their peer group. On balance, these findings are fairly encouraging, suggesting that to a considerable extent mainstreaming is working in preschool classrooms.  相似文献   

“I learn for a job promotion!”: the role of outcome-focused career goals in motivating distance learners to learn     

Clarence Ng 《Distance Education》2018,39(3):390-410

Outcome-focused career goals are concerned about studying for tangible career benefits. To what extent do these goals motivate distance learners to learn? Using a mixed-method design, Study 1 found that career-focused learners, when compared with noncareer-focused counterparts, had a propensity to endorse outcome-focused career goals, use surface strategies, value their learning, and achieve better course results. Interview findings showed that career-focused learners used a strategic approach to ensure the timely completion of tasks and examination preparation. Study 2 located two groups of career-focused learners (autonomous and controlled) who endorsed outcome-focused career goals, alongside a noncareer-focused group. MANOVA analyses found that autonomous and noncareer-focused learners had engaged learning patterns. Although controlled learners were less engaged in learning, they achieved better results. It was concluded that outcome-focused career goals are significant sources of motivation for distance learners, despite being extrinsic to learning.  相似文献   

How infants use vision for grasping objects     

McCarty ME  Clifton RK  Ashmead DH  Lee P  Goubet N 《Child development》2001,72(4):973-987

The role of vision was examined as infants prepared to grasp horizontally and vertically oriented rods. Hand orientation was measured prior to contact to determine if infants differentially oriented their hands relative to the object's orientation. Infants reached for rods under different lighting conditions. Three experiments are reported in which (1) sight of the hand was removed (N = 12), (2) sight of the object was removed near the end of the reach (N = 40, including 10 adults), and (3) sight of the object was removed prior to reach onset (N = 9). Infants differentially oriented their hand to a similar extent regardless of lighting condition and similar to control conditions in which they could see the rod and hand throughout the reach. In preparation for reaching, infants may use the current sight of the object's orientation, or the memory of it, to orient the hand for grasping; sight of the hand had no effect on hand orientation.  相似文献