网络传输与第五代远程教育展望

文章介绍了远程教育与其网络传输技术共同发展的历程，并阐述了目前影响远程教育的网络问题，指出网络技术创造了远程教育，第五代远程教育要借助于下一代网络技术，并在包含网格计算，虚拟现实等新技术条件下才能有完全意义上的实现。     

聚2.6—萘二甲酸乙二酯的结晶行为

用光学解偏振法测定了2.6—PEN的结晶速度的温度依赖性,得出其快结晶速度区域是在180℃至230℃之间,而在低于180℃或高于230℃的温度区域,结晶速度都是慢的。测定了不同结晶度试样的动态力学—温度谱,用以研究其结晶行为,得出α损耗峰随结晶度的变化。此外,将上述各实验结果与同法测定的PET的结果进行了对比,发现2.6～PEN与PET的结晶行为的相似性。     

Sixth graders in Israel recount their experience of verbal abuse by teachers in the classroom

AimThis study adopts a children’s rights perspective stated in Articles 3, 12, 19, 28 of the Convention on the Rights of Children (1989) with the goal of listening to Israeli children articulate their experience of verbal abuse by teachers in 6th grade classroomsMethodsA purposeful sample of sixty students was individually interviewed and content analysis was performed following Strauss’ (1987) constant comparative method.ResultsStudents reported teachers’ yelling, name-calling and put-downs when failing to pay attention, complete their work, or obtain good grades. They condemned teachers as particularly hurtful and cruel for publically humiliating them in class. However, awareness of teachers’ authority and fear of reprisal led to students’ silence and reluctance to report the abuse to their parents or principal. Covert opposition was nevertheless exhibited as students engaged in a silent monologue telling teachers they had no right to mistreat them (females), silently cursing (males) and/or withdrawing participation (both genders). Repeated public humiliation and scapegoating resulted in the loss of interest in teacher’s opinion and school and on rare occasions to the direct verbal confrontation or acting-out behaviour of the abused student.ConclusionThis study stresses the importance of gaining insight into the world of children by having them articulate their experience and denounce any form of abuse by teachers in the classroom. A child-safe school culture that listen to children’s view and make them feel safe when reporting any form of abuse in the classroom are preconditions to serving children’s best interests and wellbeing in schools.     

Tumor Necrosis Factor-Α, Interleukin-6, C-Reactive Protein Levels and Insulin Resistance Associated with Type 2 Diabetes in Abdominal Obesity Women

We aim to investigate the association between elevated tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6) and high sensitivity-C-reactive protein (hs-CRP) with type 2 diabetes mellitus (T2DM) in abdominal obesity (AO) women subjects. A total of 428 AO subjects (age 48.4 ± 10.2 years), and 107 non-AO women subjects (age 48.8 ± 11.8 years) were enrolled for the all biochemistry testing, inflammatory cytokines, fasting insulin and Homeostasis Model Assessment of insulin resistance (HOMA-IR). Body mass index, waist circumference (WC), blood pressure (BP), plasma glucose (Glu), triglyceride (TG), insulin, HOMA-IR and inflammatory cytokines were significantly higher and lower total antioxidant capacity, HDL-C in AO subjects (p < 0.05). WC was significantly correlated with BP, Glu, TG, LDL-C, insulin, HOMA-IR, TNF-α, IL-6 and negative correlation with HDL-C in AO subjects. Elevation of TNF-α, IL-6, hs-CRP and insulin resistance were significantly associated with T2DM in AO subjects, after adjusting with insulin resistance, increased oxidative stress, elevated TG and reduced HDL-C by using multiple logistic regression analysis. In conclusions, elevation of inflammatory cytokines, oxidative stress and insulin resistance were associated with T2DM in AO women subjects. These inflammatory cytokines are positively associated with T2DM and may have a causal relation with an increased oxidative stress and insulin resistance in these AO women subjects.     

基于ARM Cortex-M3导航系统设计与实现

本导航系统采用ARM Cortex-M3内核结构的低功耗、高性能嵌入式芯片STM32F207VGT6作为主控制器,可以接受和处理GPS信号;采用触摸屏提供良好的操作界面,并能针对目标位置提供图片与文字介绍。整个系统以低成本的方式实现,可以用于导航,还能提供相关的地理信息服务。     

酰基自由基环合反应

选择数种苯硒酯作为产生酰基自由基的母体，并按照作者已建立的方法合成．用三丁基氢化锡处理苯硒酯所产生的相应的酰基自由基按５－ｅｘｏ－ｔｒｉｇ或６－ｅｎｄｏ－ｔｒｉｇ的方式环合产生环戊酮与环己酮衍生物，环合收率高，在苯硒酯母体上的取代基团对此环合反应的位置选择性产生了重要的影响     

新中国成立70周年高等教育国际化研究的可视化分析

高等教育国际化作为发展高等教育的重要内容,始终是研究者关注的重点。为厘清新中国成立以来高等教育国际化研究的发展状况,运用CiteSpace软件对CNKI数据库中1949—2019年相关文献进行可视化分析,发现70年来高等教育国际化研究产生了数量可观的研究者;研究机构以教育类机构为主,高校是主要阵地;研究热点关注人才培养、留学生、经济体制、中外合作等;研究热点大体经历了五个不同发展阶段,主要是从单向学习借鉴模式为主演变为双向互惠、均衡流动为主;但机构间和作者间的合作程度不高。新时代中国高等教育国际化发展应更加注重机构和人员之间的深度合作、更加聚焦国际化的内涵发展和质量提升、追求更高水平更可持续发展方向,为做强中国高等教育、服务国家现代化建设、提升中国国际影响力,更好助力服务人的全面发展、民族复兴、强国建设和文明互鉴、人类进步作出新贡献。     

用Ghost软件维护校园网络机房

从制作Ghost软件的多点传输网络启动盘、制作映像文件和多点传输的实施3个方面,详细介绍了Norton公司的磁盘备份工具Ghost6.0的网络克隆功能。该方法应用于唐山学院计算机机房,大大方便了机房维护,并提高了工作效率。     

Effects of 6E-oriented STEM practical activities in cultivating middle school students’ attitudes toward technology and technological inquiry ability

ABSTRACT

Background: STEM education has become a focus of research and teaching interest in recent years. However, not all scholars agree on the definition and purpose of STEM education. This paper summarizes related past research and suggests that, according to the requirements of Taiwan’s educational environment, STEM education should focus on the cultivation of middle school students’ attitudes toward technology and their ability to engage with technological inquiry.

Purpose: The purpose of this study is to explore the effects of STEM education on attitudes toward technology and technological inquiry abilities of middle school students, this study used the 6E Learning byDeSIGN? model proposed by the International Technology and Engineering Educators Association in the US to design a 6E-oriented STEM practical activity.

Sample: The sample of the study consisted of 139 seventh-grade students from six different classes who participated in a practical activity related to egg protection devices.

Design and methods: To achieve this research purpose, a quasi-experimental design was used, with pre-treatment and post-treatment evaluations of each group. Both the experimental and control groups participated in the activity; however, the experimental group students were guided through the activity using a 6E teaching strategy, whereas the control group students were guided using a problem-solving teaching strategy.

Results: The results showed that a 6E teaching strategy had a positive effect on middle school students’ attitudes toward technology and technological inquiry abilities, but these effects were not statistically different from the effect on the control group with problem-solving teaching strategy.

Conclusions: This study indicates there is no significant advantage in using a 6E process over a problem solving approach. Technology teachers aiming to improve students’ attitudes toward technology and their technological inquiry abilities consider refining the 6E-oriented STEM practical activity process, and students may demonstrate better performance in these two areas.     

_Λ~6Li超核的基态能量

本文将谐振子乘积态为基的展开方法首次推广应用于组分集团自旋非零的系统。用此力法和α+ρ+Λ三集团模型详细研究了_6~ΛLi超核的基态结构特征。计算结果表明,此方法可以较好地应用于组分集团自旋非零的系统。