三菱可编程序控制器中高速计数器的研究与应用

本文就电气自动化领域广泛使用的可编程序控制器的高速计数器的应用作了详细的说明。由于高速计数器计数频率高,并能跳出可编程序控制器的循环扫描周期,在实际应用中使用价值很高。本文通过举例详细说明了高速计数器与编码器的匹配、最高频率的选取、相关指令与中断的组合运用。     

Grade 7 Students Reading Graphic Novels: ‘You Need To Do a Lot of Thinking’

A multifaceted, classroom‐based research project explored how developing Grade 7 students’ knowledge of literary and illustrative elements affects their understanding, interpretation and analysis of picturebooks and graphic novels, and their subsequent creation of their own print texts. Analysis of two sources of data, the students’ written responses to Amulet ( Kibuishi 2008 ), one of the graphic novels read and discussed during the study, and the students’ opinions about the knowledge that is required to read and understand a graphic novel, indicated how the instruction about various graphic novel conventions had impacted the students’ awareness of and knowledge about the structural design of these multimodal texts.     

Neuro‐linguistic programming and altered states: encouraging preparation for learning in the classroom for students with special educational needs

In seeking to identify the processes associated with the immediate engagement of learning for students with mild special educational needs, this study examined the responses of an extraction group (n = 7) of 11‐ to 13‐year‐old students who participated in a number of lessons in which the opening episode involved the use of visualisation techniques and language associated with representational systems as identified within neuro‐linguistic programming (NLP). Students endeavoured to alter their negative state to a positive state via this intervention. The study, by Voldis Kudliskis of South Dartmoor Community College, was of a naturalistic research design, and the students' experiences were explored by means of formal interviews, semi‐structured interviews, questionnaires and observations. The implications for altering state through techniques associated with NLP are described and evaluated in terms of student comments. The case is made for the process of altering state as a strategy to empower students to engage with their learning from the outset of the lesson.     

Language play in the classroom: encouraging children's intuitive creativity with words through poetry

This article begins by identifying that children have a spontaneous predilection for playing with language, engaging in poetic discourse even before their first poetry lesson. Although children's language play is relatively unresearched in the classroom, in a case study of two groups of pupils aged between 10 and 11, it was observed that children engaged in creative word play, and that this was generated in response to interaction with poetry and each other. This article suggests that children's poetical experiences may best be nurtured by building bridges between children's existing knowledge of language play and the specialised knowledge of poetry taught in the classroom through a teaching methodology based on socio‐constructivist principles.     

论构建中国特色的网络文化

在互联网时代，一个国家、一个社会如果不想被世界潮流抛得太远的话，就得借助网络的形式，去传播、弘扬本民族和本社会的优秀文化，去建设本民族、本社会新的文明。在“三个代表”重要思想的指导下，构建中国特色的网络文化，正是代表中国先进文化前进方向的具体行动。     

Family‐centred practice: collaboration,competency and evidence

In the 1990s, the developing field of early intervention with young children with disabilities and their families adopted family‐centred practice as its philosophical foundation. Family‐centred practice includes three key elements: (1) an emphasis on strengths, not deficits; (2) promoting family choice and control over desired resources; and (3) the development of a collaborative relationship between parents and professionals. During the last two decades, the field of early childhood disability has successfully defined the working principles of family‐centred practice for practitioners. Although research has acknowledged that the paradigm shift to family‐centred practice is neither simple nor easy, a substantive body of evidence demonstrates that (a) family‐centred practice can be linked to a wide range of demonstrated benefits for both children and families, and (b) families are more satisfied and find family‐centred practice to be more helpful than other models of practice.     

Using the Phono‐Graphix reading programme as a literacy support intervention strategy

The study outlined here was an attempt to investigate the effectiveness of using the Phono‐Graphix reading programme with a group of four struggling readers/non‐readers. The children selected were in Primary 2 and had already had one‐and‐a‐half years of mixed reading instruction strategies – primarily Jolly Phonics with a ‘look and say’ approach. The children were taught in twice weekly ‘pull out’ sessions in addition to learning with their peers in their normal, daily classroom lessons. Results showed that they had improved in all literacy sub‐skills being assessed. Two of them also improved on standardised assessments. All children were observed to be reading (and spelling) more accurately than at the beginning of the project.     

An integrative framework for studying,designing and conceptualising interactivity in children's digital books

In the past five years, there have been significant changes concerning the material and design properties of digital books, with an impact on children's enjoyment and learning from reading on screen. Despite the rapid advances in technology, research on children's digital books is disjointed. This is because of no consistent approach to the study of interactivity, an under‐theorised relationship between print and digital books, and a binary design focused on either learning or playful engagement with digital books. Drawing on the discourse reminiscent of digital game designers, some developers, scholars and professionals celebrate interactivity in digital books as a possibility to motivate and engage children in reading, while a body of experimental research documents the negative impact of interactivity on children's story comprehension and vocabulary learning. This paper presents an integrative framework based on a comprehensive literature review and a content review of the hundred most popular children's digital interactive books. The framework offers: (1) methodological guidance and a definition of interactivity based on five key categories; (2) theoretical guidance based on the third‐space theory; and (3) innovative design and evaluation models based on a ‘method assemblage’. As such, the integrative framework provides new tools and perspectives to advance the field of children's digital books.     

Why do long‐serving teachers stay in the teaching profession? Analysing the motivations of teachers with 10 or more years’ experience in England

This paper examines the reasons why long‐serving teachers remain in the teaching profession. Interest in teacher retention has grown in recent years, both in the UK and internationally, due to concerns over teacher shortage. However, most research on retention has focused on why teachers leave; this paper aims to fill the gap in our understanding of the positive reasons why long‐serving teachers stay in the profession, and how these reasons change over time. We define ‘long‐serving teachers’ as teachers who have taught for 10 years and more. We draw on a subset of data from an existing, broader study (Menzies et al., 2015 ) on why teachers enter and stay in the profession. In this paper, we draw on questionnaire findings from over 900 teachers with 0 to over 30 years’ teaching experience, and interviews with 14 long‐serving teachers, to understand why long‐serving teachers enter and, more importantly for our purposes, stay in teaching. We find that teachers’ motivational patterns are highly complex and influenced by school‐level and policy contexts. Nonetheless, two prominent retention factors are identified: teachers’ perceived professional mastery and altruistic reasons. Perceived professional mastery is particularly important due to its mutually reinforcing analytic relationships with other reasons. We find that teachers’ identification with intrinsic, altruistic and perceived professional mastery reasons become stronger with years of experience, but in some cases, paradoxically, so does their identification with extrinsic reasons. From our evidence, we suggest policy implications for enhancing the retention of long‐serving teachers.     

Using iPad tablets for self‐modeling with preschoolers: Videos versus photos

As technology becomes more accessible and acceptable in the preschool setting, teachers need effective strategies of incorporating it to address challenging behaviors. A nonconcurrent delayed multiple baseline design in combination with an alternating treatment design was utilized to investigate the effects of using iPad tablets to display video self‐modeling and activity photos for three preschoolers during circle time. During baseline, all three children demonstrated low levels of engagement and high levels of off‐task behavior compared to peers. The intervention phase consisted of alternating between showing the child the self‐video and photos prior to circle time. A child preference phase was conducted whereby each child self‐selected the video or photo prior to circle time. For all three children both videos and photos led to increased engagement and decreased off‐task behaviors. During the child preference phase, all three children selected the video most frequently. Social validity data demonstrated teacher and child preference for the video self‐modeling condition.