中国经济转型中公共物品提供机制的演变与改革

我国经济转型时期的公共物品供给严重不足，一方面是由于财政支出中用于基本公共物品的支出未得到相应提高，政府退出一部分微观经济领域的同时，提供公共物品方面的职能没有得到及时加强；另一方面是由于大多数领域的公共物品提供主体单一的状况没有根本改变，基本上仍然由政府来提供。要改变这种状况，就要调整财政支出结构，适当增加对科教卫、社会保障、基础设施和政权建设等基础性公共物品的支出，并改变政府在提供中的角色和方式，即由以直接提供为主转变为以间接提供为主。     

Regression Analysis for Prediction: Understanding the Process

Research related to cardiorespiratory fitness often uses regression analysis in order to predict cardiorespiratory status or future outcomes. Reading these studies can be tedious and difficult unless the reader has a thorough understanding of the processes used in the analysis. This feature seeks to “simplify” the process of regression analysis for prediction in order to help readers understand this type of study more easily. Examples of the use of this statistical technique are provided in order to facilitate better understanding.     

Heart rates of high school physical education students during team sports, individual sports, and fitness activities

This study examined how activity type influenced heart rates and time spent in target heart rate zones of high school students participating in physical education classes. Significantly higher average heart rates existed for fitness (142 +/- 24 beats per minute [bpm]) compared to team (118 +/- 24 bpm) or individual (114 +/- 18) activities. Similar results occurred for the percentage of activity time spent within a target heart rate zone (fitness 81.7 +/- 15.9%, individual 68.4 +/- 30.5%, and team 60.6 +/- 30.5%). Boys attained higher heart rates during team activities, while female students had higher rates during individual activities indicating male and female adolescents respond differently to activity types. The highest mean heart rates were observed during fitness activities.     

Connecting Video Segments to Collaborative Learning Activities

Abstract

The article discusses how sections of a video can best be used in the instructional process by activating the minds of students and using their reactions to viewing to produce intellectual action. It gives some suggested schemes for this activity and shows how technological forces can become energies of change.