It is shown that Mercury's motion of the perihelion around the Sun, which is believed to be explicable quantitatively only by general relativity, can be fully understood within the frame of the dynamics of special...It is shown that Mercury's motion of the perihelion around the Sun, which is believed to be explicable quantitatively only by general relativity, can be fully understood within the frame of the dynamics of special relativity. It is only necessary to take into consideration the relativistic dependence of the planet's inertial and gravitational masses on its velocity (relative to the Sun) in the conservation equations for energy, and linear and angular momenta in the gravitational field. The physical Problem is reduced to a singular, nonlinear differential equation, which is solved numerically for the planet Mercury. The advance of the perihelion of Mercury is shown to be = 42.087' for a period of 100 years, which is in agreement with the as- tronomical observations and the result (by analytical approximations) of general relativity.展开更多
目的编制脑卒中患者照顾者倦怠量表(burnout scale of stroke patients’caregivers,BSSPCs),并进行信效度检验,为脑卒中患者照顾者倦怠测评提供工具。方法在前期构建的脑卒中患者主要照顾者倦怠概念框架及文献分析的基础上,借鉴职业倦...目的编制脑卒中患者照顾者倦怠量表(burnout scale of stroke patients’caregivers,BSSPCs),并进行信效度检验,为脑卒中患者照顾者倦怠测评提供工具。方法在前期构建的脑卒中患者主要照顾者倦怠概念框架及文献分析的基础上,借鉴职业倦怠量表,构建条目池;通过专家咨询法及预调查,形成BSSPCs初稿;2022年7月至2023年1月,采用便利抽样法选取银川市和吴忠市5所医院康复科收治的506名脑卒中患者照顾者进行调查,应用经典测量理论(classical test theory,CTT)和项目反应理论(item response theory,IRT)对量表进行测量学评价。结果CTT结果提示存在6个条目不满足统计学要求,IRT结果显示共6个条目不符合难度、区分度或信息量的筛选标准,最终形成的BSSPCs包括角色倦怠、生理倦怠、心理倦怠和社交倦怠4个维度共24个条目。结论BSSPCs的编制过程严谨,各项心理学测量指标比较满意,为量化照顾者倦怠和开展后续研究提供了工具支持。展开更多
文摘It is shown that Mercury's motion of the perihelion around the Sun, which is believed to be explicable quantitatively only by general relativity, can be fully understood within the frame of the dynamics of special relativity. It is only necessary to take into consideration the relativistic dependence of the planet's inertial and gravitational masses on its velocity (relative to the Sun) in the conservation equations for energy, and linear and angular momenta in the gravitational field. The physical Problem is reduced to a singular, nonlinear differential equation, which is solved numerically for the planet Mercury. The advance of the perihelion of Mercury is shown to be = 42.087' for a period of 100 years, which is in agreement with the as- tronomical observations and the result (by analytical approximations) of general relativity.
文摘目的编制脑卒中患者照顾者倦怠量表(burnout scale of stroke patients’caregivers,BSSPCs),并进行信效度检验,为脑卒中患者照顾者倦怠测评提供工具。方法在前期构建的脑卒中患者主要照顾者倦怠概念框架及文献分析的基础上,借鉴职业倦怠量表,构建条目池;通过专家咨询法及预调查,形成BSSPCs初稿;2022年7月至2023年1月,采用便利抽样法选取银川市和吴忠市5所医院康复科收治的506名脑卒中患者照顾者进行调查,应用经典测量理论(classical test theory,CTT)和项目反应理论(item response theory,IRT)对量表进行测量学评价。结果CTT结果提示存在6个条目不满足统计学要求,IRT结果显示共6个条目不符合难度、区分度或信息量的筛选标准,最终形成的BSSPCs包括角色倦怠、生理倦怠、心理倦怠和社交倦怠4个维度共24个条目。结论BSSPCs的编制过程严谨,各项心理学测量指标比较满意,为量化照顾者倦怠和开展后续研究提供了工具支持。
