Factors Influencing the Physically Active Leisure of Children and Youth: A Qualitative Study

A phenomenological framework guided data collection and analysis of the prevalent influences on attitudes and behaviors of elementary, junior, and secondary school students towards their physically active leisure. Twenty-two students participated in individual in-depth interviews. Parental influence and outdoor play effected choice and level of physically active leisure for elementary students. Opportunities for organized and non-structured physically active leisure and friends were significant for junior students. Academic responsibilities and organized physically active leisure were influential for secondary students. Common threads were parental influence and the belief that the students were too old to start new activities. These findings highlight the importance of providing opportunities in safe environments for children and youth to participate in a variety of structured and non-structured forms of physically active leisure.     

How to Add Philosophy Dimensions in Your Basic International Business Course

This article aims to assist professors in introducing concepts of self, philosophy, religions, the universe, existential dilemmas, etc., in their basic international business classes. Using active learning and five-member student teams, a student organized and administered conference adds a very useful dimension of knowledge sacrificing only one teaching day. The article, capitalizing on more than 25 years of international business teaching and conference experiences, provides “how-to” suggestions to organize similar events.     

Co-Creation Experiences: Attention and Memorability

This study examines the on-site co-creation experience from a tourist perspective. A review of the literature and in-depth interviews with tourists who participated in a ‘swimming with dolphins’ experience are used to explore the importance of co-creation in enhancing attention and the memorability of the experience. Findings suggest that the co-creation experience influences memorability by focusing the tourist’s attention. This study contributes to the conceptualization of co-creation in the field of tourism by substantiating the usefulness of a psychologically based approach to experience design.     

An Educational Game for Tourism and Hospitality Education

ABSTRACT

This paper presents an educational game where players act as travel agents to learn how a travel agency functions. They are provided with an uncertain environment in which they make strategic decisions aimed at maximizing their agency's wealth. Players are expected to make managerial decisions while experiencing how market structures and strategic decision-making can affect commerce within a simulated tourism and hospitality industry. The auction game offers students hands-on experience that assists them in understanding the functioning of markets in all aspects of business. Students are also given an opportunity to interact with team-players, to compete against other students, and to develop an appreciation of the pressures facing travel agencies.     

结构式凯恩斯乘数理论与积极财政政策优化——基于消费矩阵的实证研究

2007年以来中国经济发展的外部环境急剧恶化,如何通过积极财政政策扩大内需成为当前最为关键的问题.国内外的经验和教训表明,积极财政政策发挥效应是有条件的,为了启动处于衰退中的经济,政府不仅需要采取扩张性的政策干预经济,而且由于各部门的乘数效应不同,政府更需要采取结构性的干预政策,通过对不同产业部门的不同支出以改进财政政策效率.文章回顾了国内外在结构式凯恩斯乘数理论领域的研究进展情况,认为结构式乘数的基础研究与应用实践,将为中国政府应对外部冲击和经济衰退风险提供更加科学的分析视角与更加丰富的决策手段.     

断层模型音频大地电磁测深数值模拟及应用

为探究音频大地电磁测深(AMT)对断层模型识别的效果,对不同倾角的断层模型进行数值模拟研究。采用MT2DModeling软件进行正演模拟,得到的初始模型加入10%的噪声后再采用Occam方法进行反演,数值模拟结果表明:1)音频大地电磁测深整体上对断层模型较为敏感,TE模式的纵向分辨率高,对模型的上下边界识别较为清晰,TM模式的横向分辨率高,对模型水平方向边界识别更好;2)对于不同电性组合断层模型,AMT对相对低阻断层的模型识别效果优于相对高阻断层的模型,其中TM模式对于高阻的识别效果要好于TE模式;3)对于不同倾角的低阻断层模型,TM模式对于反演结果上、下盘梯度变化率反应明显,即变化率大的方向为倾斜方向;4)TE模式正演结果对于断层倾角变化的反应明显,可以作为识别断层倾角的参考。通过对AMT法在琼北锦山地区活动断裂(马袅-铺前断裂东段)勘测的实际资料及钻孔结果进行分析,得到了断裂空间展布的定量认识,表明断裂自第三纪以来均有剧烈活动,活动期次已达到全新世。研究结果为海南地区开发建设提供了地质地球物理依据,也为其断层活动性、岩浆活动性等的进一步探究打下了良好的研究基础。     

对空情报雷达网密集假目标干扰机理分析

针对雷达网欺骗干扰问题,首先讨论了雷达网数据关联处理方法薄弱环节,给出了可以欺骗雷达网的假目标应该满足的条件,然后分析对空情报雷达网密集假目标干扰的产生机理和作用机理,为产生高逼真的假目标,将空间分布转化为非线性最优化问题。当进行多干扰机协同干扰时,将干扰机功率资源在空间的分配问题转化为非线性规划问题。仿真研究了对网络化雷达的假目标欺骗干扰效果以及影响干扰效果的因素,该结果可为对空情报雷达网电子对抗提供理论指导。     

基于一维距离像稀疏表达的无源假目标识别

为了解决敌方释放箔条干扰我方防空反击任务或者敌方舰船设置角反射器阵列干扰我方对海目标打击任务中的雷达抗干扰问题，提出了一种基于雷达一维距离像的稀疏表达的无源假目标识别的方法。首先，分别利用大量关注目标和无源欺骗干扰的雷达一维距离像数据进行稀疏字典学习，分别得到目标和干扰的稀疏字典；然后利用两种稀疏字典分别对未知的雷达一维距离像信号进行稀疏表达；最后分别计算两种稀疏字典对未知信号稀疏表达的重构误差，利用重构误差比值识别目标和干扰类别。仿真结果表明，在目标与无源假目标干扰的回波不混叠、目标与干扰噪声比3 dB条件下，识别无源假目标欺骗干扰的准确率超过90%，证明了该方法抗无源假目标干扰的有效性。     

积极老龄化态度:个体差异、组群效应、时代变迁

基于积极老龄化理论,利用CLHLS数据构建积极老龄化态度的HAPC回归模型,将个体微观数据嵌入宏观社会经济环境,探讨了积极老龄化态度的个体差异、组群效应及其时代变迁。研究结果表明:随着年龄的增长,老龄化态度越来越消极,但教育水平、居住地等因素有效调节了年龄的负向作用;老龄化态度呈现“U”型组群效应,由于出生及儿童期的负面经历,1916—1935年出生的老年人的老龄化态度最为消极;1998—2014年宏观社会经济环境对我国老龄化态度产生了“M”型时期效应。对此,当前我国迫切需要将积极老龄化提升为一项基本国策,进一步明确其概念边界与政策意涵,营造良好的政策环境,培育积极老龄化的国民素养,对不同个体、群体制定差异化政策,并根据时代变迁适时调整。     

基于电磁直线作动器的主动悬架控制方法研究

为了实现电磁直线作动器主动悬架中电磁阻力的有效跟踪输出,进一步提高悬架的性能,利用1/4主动悬架系统的动力学模型和作动器驱动电路模型,设计了LQG控制器和Fuzzy-PID控制器相结合的主动悬架分层控制系统。给出了电磁直线作动器主动悬架控制系统的设计方案,利用MATLAB/Simulink搭建模型进行仿真,并通过具体的台架试验验证。结果表明,主动悬架的减振性能得到了明显改善,其车身加速度和悬架动行程得到了大幅降低。研究结果对电磁悬架的主动控制方法研究具有一定的参考价值。