How Does the Degree of Guidance Support Students’ Metacognitive and Problem Solving Skills in Educational Robotics?

Educational robotics (ER) is an innovative learning tool that offers students opportunities to develop higher-order thinking skills. This study investigates the development of students’ metacognitive (MC) and problem-solving (PS) skills in the context of ER activities, implementing different modes of guidance in two student groups (11–12 years old, N1 = 30, and 15-16 years old, N2 = 22). The students of each age group were involved in an 18-h group-based activity after being randomly distributed in two conditions: “minimal” (with minimal MC and PS guidance) and “strong” (with strong MC and PS guidance). Evaluations were based on the Metacognitive Awareness Inventory measuring students’ metacognitive awareness and on a think-aloud protocol asking students to describe the process they would follow to solve a certain robot-programming task. The results suggest that (a) strong guidance in solving problems can have a positive impact on students’ MC and PS skills and (b) students reach eventually the same level of MC and PS skills development independently of their age and gender.     

影响排球"自由防守人"技术因素的分析

运用文献资料法、统计法和摄像分析的研究方法,对九运会男排“自由防守人”的技术情况进行分析、比较。认为判断能力、场上意识、以及移动能力是影响“自由防守人”技术发挥的主要因素。本文对影响“自由防守人”技术的主要因素进行分析,以便为提高“自由防守人”的接发球和防守的训练水平提供参考。     

关于浙江省高等职业技术学院师资队伍建设的思考与分析

文章根据浙江省高等职业技术学院历年来师资队伍数量、结构的变动情况,分析了浙江省高职院师资队伍的现状,总结了高职院在师资队伍建设方面取得的主要成绩及原因,反映了高职院现有师资队伍存在的主要问题,并建议高职院校的师资队伍建设应遵循内部培养与外部引进并举、学历与能力并存、数量与结构兼而得之、教学与科研相辅相成的原则.     

Erosion behavior and mechanism of boronised steels

Boronising of steels is a hardening process to get high surface hardness. The erosion resistance of boronised steels was researched with the use of four kinds of erodent, i.e. glass, alumina, quartz and silicon carbide. The erosion rate increases rapidly with erodent hardness and severe erosion occurs with high impacting angle range of hard particles. SEM analysis indicated that chipping is caused by repetitive impacting of glass and quartz, whereas by alumina and silicon carbide impacting, chipping, and that plastic flow take place simultaneously and the erosion rate reaches the peak value when the impacting angle is above 60°.     

塞拉斯的科学实在论本体观

科学实在论是现代科学主义重建形而上学的一种新形态。塞拉斯肯定科学影像优先 ,建立理论实体存在观 ,从科学理论角度重新讨论了人类认识的基础 ,充且肯定了形而上学因素特别是本体论在科学理论中的重大作用。     

20世纪后半期局部战争的特点及类型剖析

从二次世界大战结束到现在，局部战争连绵不断。局部战争制造并加剧了国际局势的紧张，威胁着世界的和平与安全，是世界不安宁的主要因素。探讨局部战争的根源和起因，剖析局部战争的特点和类型，制定正确的政策和策略，对于维护世界持久和平、保障各国人民的自由、独立和社会进步，具有重大现实意义。     

在局域网上组建视听网络课室

所谓视听网络课室就是运用网络功能实现视频、音频点播并且具有交互功能及数据库处理的网络。也就是说，组建视听网络课室必须考虑的问题有：（１）硬件环境；（２）软件环境；（３）相应的课件。一、硬件环境硬件环境要达到实现视频、音频点播，就必须要有宽带高速的网络基础。要达到高速，就要解决服务器的吞吐量和网路的带宽。采用分布网络系统，即视频服务器、web服务器、数据服务器分开，由高速交换机或高速路由连接。下面是我校视听网络课室的网络连接图：由图可见，我们采用了三台视频服务器，每台视频服务器供５０个用户，整间课室…     

Two ancient rounds of polyploidy in rice genome

An ancient genome duplication (PPP1) that predates divergence ofthe cereals has recently been recognized. We report here another potentially older large-scale duplication (PPP2) event that predates monocot-dicot divergence in the genome of rice(Oryza saliva L.), as inferred from the age distribution of pairs of duplicate genes based on recent genome data for rice. Our results suggest that paleopolyploidy was widespread and played an important role in the evolution of rice.     

努力打造东北老工业基地职业教育与培训的旗舰

人才是振兴东北老工业基地的决定性因素，大力发展职业教育和以职工技能培训为主的继续教育，事关老工业基地振兴战略全局，是全面提高劳动者素质，发展先进生产力的必然要求，是进行人力资源开发，推动经济社会可持续发展，提高企业核心竞争力的重要途径，是促进劳动就业，维护社会稳定的重要举措。