Mobile APP for motivation to learning: an engineering case     

Min Jou  Yen-Ting Lin  Hsieh-Chih Tsai 《Interactive Learning Environments》2016,24(8):2048-2057

Synthesis of Materials is regarded as an important core subject in engineering education. However, many concepts and knowledge in the material synthesis can be rather abstract and difficult to understand by the student learners. Experiments are limited in scope due to lack of equipment, control of toxic materials, and risks of chemical reactions, which often restricts student imagination and student involvement in practical training. These reasons often led to poor learning attitude and learning performance among the students. Rapid developments in Cloud technology and mobile devices have provided new opportunities for developing novel learning tools for material synthesis. This study aims to introduce interest factors as a strategy for promoting learning interest and practical skills among the students. Chemical symbols, experimental themes, texts, and interactive elements were utilized to develop a theme-based Mobile Learning APP for teaching the practical techniques of material synthesis. The Mobile Learning APP was then integrated into a problem-based learning activity. A quasi-experimental design was used to investigate the resulting learning effectiveness from using the developed Mobile Learning APP. Results show that the Mobile Learning APP provided a significant positive effect on learning performance and that most students showed favorable attitudes toward the usage of the mobile learning system.  相似文献   

稀土复合固体超强酸SO_4~(2-)/TiO_2/Ce~(4+)催化合成乙酸环己酯及动力学研究     

邓斌  梁超伦  陈六平 《湘南学院学报》2007,28(5):62-66

研究了以稀土复合固体超强酸SO42-/TiO2/Ce4+为催化剂合成乙酸环己酯的反应,在反应温度分别为100℃、110℃、120℃下,测出酯化反应的动力学参数,建立了动力学方程,并与无催化剂作用下合成乙酸环己酯反应的活化能及动力学方程进行了比较.实验结果表明,该催化酯化反应的优化合成条件是:乙酸用量为0.262 1mol时,醇酸摩尔比为1.5:1,催化剂用量为1.0g,带水剂环己烷的加入量为12mL.稀土复合固体超强酸SO42-/TiO2/Ce4+可使反应的活化能明显降低,是合成乙酸环己酯的有效催化剂.  相似文献   

微波合成半导体HgS纳米粒子   总被引：2，自引：3，他引：2  

廖学红 《黄冈师范学院学报》2001,21(3):48-51

在甲醛溶液中，以Hg(Ac)2和TAA为原材料，通过微波加热合成了HgS半导体纳米粒子，并用XRD、TEM、紫外光谱进行了表征。  相似文献   

中国传统思维方式的特征及形成原因   总被引：2，自引：0，他引：2  

代杰 《哈尔滨学院学报》2004,25(8):42-46

中国传统思维方式是指那些在中华民族发展过程中 ,“长久地、稳定地起作用的思维习惯、思维方法” ,以及“对待事物的审视趋向和公认的观点”。它是一种东方的智慧 ,意蕴相当丰富 ,既有历史的智慧积淀 ,又有现实的智慧映像 ,还有未来智慧的闪光。中国传统思维方式正是在其特定条件下形成的 ,它的特征在世界上更是独一无二的。因此 ,只有对中国传统思维方式重新加以认识 ,我们才能真正成为东方智慧的发扬者。  相似文献   

合成草莓酯的新型催化剂     

盛淑玲  曹培斌 《许昌学院学报》2005,24(2):37-40

综述了无机盐、无机酸、杂多酸(盐)、固体超强酸等催化剂催化合成草莓酯的实验情况.结果表明,硫酸铝、CuCl2 ·2H2 O、固体超强酸SO2 -4 -TiO2 /Al2 O3、活性炭固载硅钨酸等催化剂催化合成草莓酯的收率较高,具有一定的工业应用价值.  相似文献   

基于三变量函数的计算机辅助逻辑综合     

厉晓华  朱敏  陈偕雄 《科技通报》2006,22(1):101-104

本文讨论了逻辑函数的分类，在查表综合的基础上，用计算机辅助来实现三变量函数的基于一位全加器、通用逻辑门、通用阈值逻辑门的逻辑综合。  相似文献   

Review of economic bubbles     

《International Journal of Information Management》2016,36(4):497-506

This paper investigates the history of economic bubbles and attempts to identify whether there are direct correlations between different bubbles. To support this research, literature has been consulted on historical and recent bubbles, theories surrounding speculation, the market for venture capital, and bubbles in the technology sector. By analysing a range of bubbles, rather than just those in the technology sector, general bubble-principles are also identified. All the economic bubbles are classified under “uncontrolled risk” and a recommended method that can detect and analyse full impacts by uncontrolled risk will be presented, together with future directions to be discussed.  相似文献   

Factors affecting authors' manuscript submission behaviour: A systematic review     

Xiaoting Xu  Juan Xie  Jianjun Sun  Ying Cheng 《Learned Publishing》2023,36(2):285-298

  相似文献   

同方向简谐运动的合成研究     

胡光  白永前  秦静 《宜春学院学报》2011,33(12):30-33

基于数学的三角函数方法和物理的旋转矢量方法从理论上对同方向简谐运动的合成进行研究,采用计算机的仿真模拟和物理实验演示等方法对同方向简谐运动的合成进行验证。  相似文献   

Interventions supporting baccalaureate achievement of Latinx STEM students matriculating at 2-year institutions: A systematic review     

Julie P. Martin  Nathan Hyungsok Choe  Jared Halter  Margaret Foster  Jeffrey Froyd  Maura Borrego  Erica R. Winterer 《科学教学研究杂志》2019,56(4):440-464

Numerous national reports have identified the importance of significantly improving pathways that begin with Latinx students enrolling in 2-year institutions and ultimately completing baccalaureate degrees in STEM fields at 4-year institutions. Many programs using multiple interventions have been designed, implemented, and studied to achieve this goal. To synthesize what has been learned from studies of these programs, this article presents a systematic review of published studies of programs designed to support Latinx student success in 2-year institutions and successful transfer to 4-year institutions, particularly for STEM majors. A total of 49 quantitative, 9 qualitative, and 16 mixed-methods studies published as reports, articles, or dissertations since 1980 were identified that met the criteria for the review. Studies covered a wide range of interventions, including mentoring, counseling, advising, study groups, tutoring, scholarships, orientations, career services, undergraduate research, articulation agreements, and transfer programs. Individually, these studies report positive influences on student success outcomes, including 2- and 4-year graduation, transfer to a 4-year institution, retention, and success in individual courses. However, the number of qualifying studies was surprisingly small, considering the importance of improving success of Latinx students and the length of time during which the problem has been repeatedly emphasized. Few interventions have been undertaken from explicitly assets-based perspectives or theoretical frameworks. The lack of explicit frameworks underlying interventions—combined with a sole/primary focus on students—suggests many interventions were approached from a deficit-based perspective. Further, the study found no pattern of replication studies that might confirm effectiveness of potentially promising interventions. Based on our analysis of evaluations presented in the studies, it does not appear that the research community has developed agreed-upon methods to evaluate commonly agreed-upon outcomes. Finally, no intervention has been sufficiently supported that widespread implementation could be recommended.  相似文献