This research aims to explore the major determinants of work-life balance(WLB)for university student workers in Lebanon.The proposed relationships consist of causality between each of the variables of working hours,pr...This research aims to explore the major determinants of work-life balance(WLB)for university student workers in Lebanon.The proposed relationships consist of causality between each of the variables of working hours,proximity to employment,proximity to university,workload,study leave,leaving early,work from home,study at work,and flexible working hours on one hand,and work-life balance on the other.Employing a deductive approach,this study presents one main research question and quantitatively tests 11 hypotheses using a sample of 300 workers studying in both Lebanese University and Notre Dame University.The findings show that work-life balance significantly varies according to demographic factors.As for variables,the number of courses was found to have a significant negative causal relation with work-life balance,while the ability to obtain a study leave and leaving early have a significant positive causal relation with work-life balance.This research adds quantitative empirical proof that number of courses,study leave,leaving early significantly affect“work-life balance”of today’s private and public university student workers in Lebanon.Therefore,the findings offer a theoretical enrichment to the topic of work-life balance in general,and open way for new research to expand internationally as well as locally.展开更多
深空探测器精密定轨软件系统的研制在深空探测活动中是一个非常重要的环节,一直受到各大航天机构的重视。针对国内外深空探测器精密定轨软件平台的研究现状,重点介绍了具有代表性的美国JPL(Jet Propulsion Laboratory,喷气推进实验室)的...深空探测器精密定轨软件系统的研制在深空探测活动中是一个非常重要的环节,一直受到各大航天机构的重视。针对国内外深空探测器精密定轨软件平台的研究现状,重点介绍了具有代表性的美国JPL(Jet Propulsion Laboratory,喷气推进实验室)的DPTRAJ/ODP(Double Precision TRAJectory program/Orbit Determination Program,双精度轨道程序/定轨程序)和MONTE(Mission analysis,Operations,and Navigation Toolkit Environment,任务分析、操作和导航工具箱环境),GSFC(Goddard Space Flight Center,戈达德航天飞行中心)的GEODYN-II以及法国CNES(Centre National dEtudes Spatiales,国家空间研究中心)的GINS(Géodésie par Intégrations Numériques Simultanées,同步数值积分大地测量)软件系统,对这些软件的结构与功能进行了总结。之后对武汉大学自主研制的深空探测器精密定轨软件系统WUDOGS(Wuhan University Deep space Orbit determination and Gravity recovery System,武汉大学深空探测器精密定轨与重力场解算软件系统)的主要模块与功能进行了介绍,通过与GEODYN-II的交叉对比验证,表明:对于探测器的轨道预报,WUDOGS与GEODYN-II的1个月位置差异小于0.3mm,2d位置差值小于5×10^(-3) mm;双程测距、双程测速的理论计算值和GEODYN-II的差值RMS(Root Mean Square,均方根)分别在0.06mm,0.002mm/s的水平;WUDOGS目前已初步具备了月球和火星探测器精密定轨能力。最后对WUDOGS的下一步发展方向进行了展望。展开更多
文摘This research aims to explore the major determinants of work-life balance(WLB)for university student workers in Lebanon.The proposed relationships consist of causality between each of the variables of working hours,proximity to employment,proximity to university,workload,study leave,leaving early,work from home,study at work,and flexible working hours on one hand,and work-life balance on the other.Employing a deductive approach,this study presents one main research question and quantitatively tests 11 hypotheses using a sample of 300 workers studying in both Lebanese University and Notre Dame University.The findings show that work-life balance significantly varies according to demographic factors.As for variables,the number of courses was found to have a significant negative causal relation with work-life balance,while the ability to obtain a study leave and leaving early have a significant positive causal relation with work-life balance.This research adds quantitative empirical proof that number of courses,study leave,leaving early significantly affect“work-life balance”of today’s private and public university student workers in Lebanon.Therefore,the findings offer a theoretical enrichment to the topic of work-life balance in general,and open way for new research to expand internationally as well as locally.
文摘深空探测器精密定轨软件系统的研制在深空探测活动中是一个非常重要的环节,一直受到各大航天机构的重视。针对国内外深空探测器精密定轨软件平台的研究现状,重点介绍了具有代表性的美国JPL(Jet Propulsion Laboratory,喷气推进实验室)的DPTRAJ/ODP(Double Precision TRAJectory program/Orbit Determination Program,双精度轨道程序/定轨程序)和MONTE(Mission analysis,Operations,and Navigation Toolkit Environment,任务分析、操作和导航工具箱环境),GSFC(Goddard Space Flight Center,戈达德航天飞行中心)的GEODYN-II以及法国CNES(Centre National dEtudes Spatiales,国家空间研究中心)的GINS(Géodésie par Intégrations Numériques Simultanées,同步数值积分大地测量)软件系统,对这些软件的结构与功能进行了总结。之后对武汉大学自主研制的深空探测器精密定轨软件系统WUDOGS(Wuhan University Deep space Orbit determination and Gravity recovery System,武汉大学深空探测器精密定轨与重力场解算软件系统)的主要模块与功能进行了介绍,通过与GEODYN-II的交叉对比验证,表明:对于探测器的轨道预报,WUDOGS与GEODYN-II的1个月位置差异小于0.3mm,2d位置差值小于5×10^(-3) mm;双程测距、双程测速的理论计算值和GEODYN-II的差值RMS(Root Mean Square,均方根)分别在0.06mm,0.002mm/s的水平;WUDOGS目前已初步具备了月球和火星探测器精密定轨能力。最后对WUDOGS的下一步发展方向进行了展望。