TiNx-SiO2减反射膜的制备

This paper describes the preparation and properties of TiNx-SiO2 double-layered antireflective(AR) coatings that were applied with print process. The coating material was analyzed and TiNx was used instead of TiO2 as high refractive material. The influence of solution concentration on AR property was studied. The testing result shows that the coatings using print process are featured with excellent mechanical property and the AR property is comparable to American Southwall AR product. It is expected that the study would promote the industrialization progress in AR coatings.     

Preparation and Properties of TiNx-SiO2 Antireflective Coatings with Print Process

This paper describes the preparation and properties of TiNx-SiO2 double-layered antireflective(AR) coatings that were applied with print process. The coating material was analyzed and TiNx was used instead of TiO2 as high refractive material. The influence of solution concentration on AR property was studied. The testing result shows that the coatings using print process are featured with excellent mechanical property and the AR property is comparable to American Southwall AR product. It is expected that the study would promote the industrialization progress in AR coatings.     

不锈钢基底上铱的电沉积

制备了不锈钢镀铱电极，研究了其在酸性介质中的析氢电催化性能，通过含铅与不含铅镀层析氢性能的比较及测定镀层中铅元素的电子结合能数值，初步研究了Pb^2 离子对镀层性能及电沉积过程的作用，并观察了电极的表面形貌。     

等离子喷涂Al2O3-13%TiO2涂层的组织结构与性能分析

为研究等离子喷涂纳米Al2O3-13%TiO2涂层的工程应用前景,采用等离子喷涂工艺制备了纳米Al2O3-13%TiO2耐磨涂层,利用金相显微镜和扫描电子显微镜对涂层截面和断口形貌进行分析并测试了力学性能。结果表明;纳米Al2O3-13%TiO2涂层组织致密,层间结合良好,具有较高的显微硬度和较低的孔隙率。     

IMPLICATIONS OF PRESTEL AND OTHER TV PRINT SOURCES

Since Prestel and other televised print sources signal a revolution in the presentation of reading material to the public, it is necessary to ensure that the viewers are able to read the material. Are they ready and able to adapt their reading skills to read televised texts? Differences between page print and television print are discussed, with respect to form and style, and recommendations are made about the responsibility of the educational establishment towards the preparation of potential viewers.     

思维方式与材料运用的相互启示

强化材料在版画创作中的意识,充分挖掘版画媒介的材料属性和艺术表现方面的潜能,有利于艺术家在更大的空间里拓展和构建版画语言。     

重塑当代版画的精神内核

中国版画有着上千年的历史,但20世纪30年代以前的版画仍然是复制版画。自1931年起,由鲁迅倡导的新兴木刻才开始了我国有创作版画的史页,历经半个多世纪,曾出现过几次高潮时期,产生了一大批优秀的版画家和在国内外有影响有重要价值的版画作品,发展健全了各个版种。中国版画艺术取得了辉煌的成就,但我们也应该看到,当下进入转型时期的中国版画面临一定的困境,一些作品刻意追求版画的形式语言,片面追求作品的印痕美感等本体语言,使作品只停留在技术层面,疏离了版画作品本身的内在精神,缺少深刻的内涵和思想,缺少生命力。"形而上者谓之道,形而下者谓之器"。版画要走出低谷寻求新的发展,由"技"进乎"道"是当务之急。     

The effect of using augmented reality and sensing technology to teach magnetism in high school physics

ABSTRACT

The purpose of this study is to investigate the effect of MagAR, an instructional material for teaching magnetism using augmented reality and sensing technology, on students’ academic achievement and learning process, and to identify students’ views about augmented reality. An embedded mixed-method approach was employed in this study. The study’s results suggest that AR learning environments are effective in teaching physics, and facilitate learning by adding visual and textual components to the learning process. In learning activities integrated with AR, the students were observed to participate more, appeared more comfortable, were able to answer questions related to the subject more easily, had increased self-confidence and exhibited higher academic achievement levels in physics. The results suggest that AR should not be considered as an independent learning environment for the teaching of physics, but would be more effective as supplementary to the laboratory environment.     

水性电磁屏蔽涂料研究进展

随着电子信息技术的发展,电磁干扰和电磁辐射影响着生产和信息安全以及人们的健康,因此电磁波屏蔽已成为研究的热点。水性导电涂料是一种有效且绿色环保的电磁屏蔽涂料。综述了镍系、铜系、碳系和复合型水性电磁屏蔽涂料的组成、特点、存在的问题及发展状况。镍系水性涂料电磁屏蔽性能和抗氧化性能良好,是当前水性电磁屏蔽涂料的主流;铜系水性涂料导电性好,但抗氧化性差,如何防止铜在水中的氧化是当前铜系水性涂料制备的关键技术问题;碳系水性涂料的耐腐蚀性好,密度小,价格低,但导电性相对较差,电磁屏蔽性能不显著,纳米石墨微片的表面改性处理是增强碳系涂料电磁屏蔽性能的重要手段;复合型导电涂料成本低、电磁屏蔽性能高,是今后水性涂料的主要发展方向。     

Text density level as a design variable in instructional displays

Presenting narrative text in computer-based instruction (CBI) is more difficult than in print lessons due to limited screen resolution and display area. The present research aimed at achieving a more compatible match between lesson content and the attributes of the presentation media. Subjects received either a print or CBI statistics lesson containing low-density (concise) narrative text, high-density (conventional) text, or the density type they preferred (learner-control). Results showed the low-density lesson to reduce completion time relative to the high-density version, while yielding equivalent achievement. Subjects receiving the lesson in the print mode had shorter completion times and higher achievement than their CBI counterparts. Attitude results showed that CBI was favorably regarded, but perceived as longer and slow-moving than print. Implications of results for designing instructional material in accord with CBI attributes and learner characteristics are discussed.     

Text features and preschool teachers’ use of print referencing

Storybook features, such as linguistic richness and print salience, potentially influence how a teacher references print. This study addressed two research questions: (1) to what extent does the linguistic richness and print salience of children's storybooks relate to teachers’ use of print referencing? and (2) to what extent is there an interplay between storybooks’ linguistic richness and print salience when predicting teachers’ use of print referencing? Fifty‐seven teachers participated in a whole‐group read‐aloud intervention while including print‐referencing behaviours. Researchers analysed teacher videos in order to (1) document teachers’ use of print referencing and (2) document the storybook's linguistic features and print salience. Results indicated that print salience is highly positively related to teachers’ use of print referencing. Also, the constructs of Print Salience Metric (PSM) and total words predicted teachers’ use of print referencing, and the interaction between PSM and mean length of sentence was significant for storybooks with moderate and high PSM scores.     

硬质薄膜耐磨性的凹坑磨损法

薄膜镀层由于厚度小，难以用通常的磨损方法评估其耐磨性。本文研究了采用精密凹坑研磨仪评价薄膜镀层耐磨性的方法，并对TaN/NbN纳米多层膜和TaN、NbN单层膜进行了磨损实验。结果表明，精密凹坑研磨仪是一种适用于评价薄膜镀层耐磨性的方法。TaN/NbN纳米多层膜有TaN、TbN单层膜更高的耐磨性。     

Effects of learning physics using Augmented Reality on students’ self-efficacy and conceptions of learning

The Augmented Reality (AR)-based learning environment not only provides educators with novel ways to present learning materials but also give learners the opportunity to spontaneously interact with the material. Previous studies have shown that AR has many advantages in education; however, few focuses on the mechanisms behind promoting inquiry motivation, such as the effect of AR on learners’ self-efficacy and conceptions of learning. This study developed an AR-based wave-particle duality learning application, “AROSE,” to explore the effect of AR technology on students’ self-efficacy and conceptions of learning physics. A quasi-experimental study method was used, and 98 high school students aged between 16 and 18 were randomly assigned to experimental and control group. After a 4-week intervention, it was found that integrating AR technology into physics classrooms can (1) significantly enhance students’ physics learning self-efficacy, as indicated by understanding of concepts, higher-level cognitive skills, practice and communication; (2) guide students to be more inclined to higher-level conceptions of learning physics rather than lower ones; and (3) stimulates students’ motivation to learn more deeply.     

电弧喷涂工艺参数对4Cr13合金涂层结合强度的影响

以雾化空气压力、喷涂电压、喷涂电流和喷涂距离等4个电弧喷涂主要工艺参数为因素进行正交试验,每个因素设置3种水平。采用自主研发的新型4Cr13合金药芯丝材,通过高速电弧喷涂设备在Q235钢板上制备涂层,分别考察这些参数对涂层与基材结合强度的影响规律,从而获得基于结合强度的最优电弧喷涂工艺参数,为制备高综合性能的涂层打下良好基础。     

基于书版格式的题库管理及组卷系统的制作

目前大多数题库系统都是Word格式,实际上这有两个弊端:一是不能同步印刷厂的排版操作过程,绝大多数印刷厂均使用方正书版系统,二是Word生成的试卷不美观,不能实现psp的发排过程。该文从实用角度出发,指出了能够完全同步印刷出版行业的标准需要的题库平台制作关键,借助该平台就可以实现多学科试题库的建立及组卷系统的完成。     

建国后中国农地产权制度的历史考察与现实启示

农地产权制度是指人们在利用农村土地时所受的人为制约,是人们占有和使用农村土地的行为规范.对基于制度变迁理论及建国后中国农地产权制度变迁进行历史考察,寻找出对我国农地产权制度改革有所裨益的启示,以利于设计出具有现实可行性的农地产权制度创新方案.     

Lessons learnt from applying action research to support strategy formation processes in long-term care networks

This study demonstrates how action research (AR) that is aimed at scaling-up experiments can be applied to support a strategy formation process (SFP) in a subsidized long-term care network. Previous research has developed numerous AR frameworks to support experiments in various domains, but has failed to explain how to apply AR and action learning (AL) on the strategic level of organizational networks. Given this situation, we used a generic AR framework to explore its usefulness in supporting SFPs. The framework consists of four steps: (1) identifying the problem situation, (2) planning a solution, (3) taking action, and (4) reflecting on the action. The results show that utilizing AL in AR helps actors to reflect on and understand the challenges in forming a joint strategy in a network. We demonstrate that it can help to visualize the process and to create a common ground for discussion, to create a shared vision as well as commitment to scaling-up experiments. These insights should be used in future SFPs in networks. However, the results also show that the key barrier, the lack of executive commitment, was only identified at a late stage. This paper constitutes a first step toward a more sophisticated AR framework for strategy research. The mistakes highlighted here should help others avoid them in the future.     

An Observational Study of Print Literacy in Canadian Preschool Classrooms

The purpose of this study was to examine the role of print literacy in preschool classrooms. There were seven preschool teachers working in central Canada who were observed over three sessions. The process of analytic induction was used to formulate categories based on interviews, classroom observations and documents. The following categories were identified from the data: book engagement and availability, writing engagement, and print displays and materials. There were some consistencies across centres in the availability of print materials; however, variation often existed in the types of interactions with print. For example, in some preschool classrooms, teachers had a more structured approach toward writing development while in others, they did not. Such differences in practice may be attributed to different beliefs and knowledge of early literacy development. The results of this study offer insight on the role of print literacy in preschool classrooms.     

Investigating the use and effectiveness of diverse types of materials in the delivery and support of lab sessions for multimedia subjects and students

This research study explores the use of different lab material, investigating which types of materials contribute the most to the delivery and support of laboratory (lab) sessions to design, skill‐based and technical courses in higher education in the UK. A qualitative research methodology was employed for this investigation and included both key stakeholders in academia, including 75 students and 12 tutors. An investigation was also conducted tracking student activity on the university's e‐learning facility (U‐link). Our key findings indicate that overall electronic material is considered the most effective type of material for the delivery of a lab session. This is followed by print, video and lastly audio material according to student responses and video, print and audio material according to tutor responses. Student and tutor responses varied per individual module/subject area. Video material was regarded by students and tutors as the most effective type for the delivery of skill‐based lab sessions and generally for independent learning, and electronic material was regarded as the most effective type for the delivery of technical and design lab sessions. Lastly, student tracking revealed that the introduction of video lab material in two modules increased the average time spent by students on U‐link by 58% for the technical module and 97% for the skill‐based module respectively.     

Preparing CBI print‐based support material: an information/instructional design perspective

Computer‐based instructional (CBI) materials are frequently accompanied by student study guides. This report details Grant MacEwan Community College's experience in producing print‐based material to support its computer‐managed learning (CML) system. Thus the report is written from a CBI perspective, and attempts to place emphasis on the recognition of cognitive processes in the development of CBI and related materials. Grant MacEwan material has been developed using the instructional design principles promoted by Gagne and Briggs (1979). The first part of this report focuses on content organization. The ideas presented may be applicable to any setting requiring the development of independent study print support material.