Trends in inequality in China suggest that there has been a significant increase in inequality in the distribution of income from around 0.30 in 1980 to 0.55 in 2012. Research over the last two decades has focused on identifying the main drivers of the increase in inequality. The main objective of this paper is to examine the relationship between urbanization and income inequality in China using provincial level data over the period 1987-2010. Using a panel of data for 20 provinces collected from the Chinese Statistical Yearbooks for five selected years. The empirical analysis based on OLS, fixed and random effects models, show a robust inverted-U relationship between inequality and urbanization. A threshold rate of urbanization of 0.53 has been identified with the implication that provinces with levels of urbanization higher than the threshold will experience reductions in income inequality. The second objective of the paper investigates the role of urbanization and the rural-urban wage differential on provincial inequality. Based on data from a representative cross-section of six provinces covering the period 1987-2005, we find that well-developed or income rich regions tend to have lower rural-urban inequality and higher migrant inflows and the rural-urban wage gap make significant contributions to income inequality.
This paper presents a detailed numerical study of specific absorption rate (SAR) and temperature increase calculations within pregnant female models exposed to magnetic resonance imaging (MRI). Nine pregnant female models, representing different pregnant stages, were used for this study. SAR and temperature increase within and around fetuses at different pregnancy stages were calculated for two MRI operating modes (normal mode and first-level controlled mode) at 64 and 128 MHz. Local fetus energy deposition exceeds the International Electrotechnical Commission limit of 10 W/kg in the first-level controlled mode at 64 MHz. Fetus temperature exceeds or approaches 38 C for both frequencies in the first-level controlled mode at later stages of pregnancy. The core temperature limits for both modes and both frequencies are not exceeded. The results show higher maximum SAR and higher temperature at 64 MHz and during later pregnancy stages with a significant increase starting with the fifth month of pregnancy. Based on the results of this study, radiologists can minimize local fetus heating, especially late in pregnancy, by using normal mode sequences, which minimize the whole body SAR in the mother.Index Terms-Electromagnetic heating, finite-difference method, magnetic resonance imaging (MRI), pregnant woman, safety standards.
A nonorthogonal finite-difference time-domain method for computing the band structure of a two-dimensional photonic crystal with dielectric and metallic inclusionsIn this article, we introduce a numerical procedure to evaluate effective dielectric properties of arbitrary multicomponent three-dimensional mixtures. Recognizing that many mixtures have periodic extend in all directions, we only need to analyze a unit element for effective electrical properties extraction. The numerical technique used here is a finite-difference time-domain method with a periodic boundary condition that generalizes many boundary conditions used in previous works. Several numerical examples are provided to demonstrate the effectiveness of this method. Using this developed procedure, we study the effects of frequency, inclusion shapes, inclusion volume, and inclusion conductivity on mixture's electrical properties. It is observed that these parameters can significantly change the electrical properties of mixtures.
The Chinese population is aging rapidly while both the pension system is underdeveloped and the traditional family care arrangement is in retreat. This article's objective is to assess the relationship between concerns over retirement saving sufficiency and the mental health status of middle-aged and older Chinese adults, and identify the socioeconomic and demographic profile of those with insufficient retirement savings. A survey from about 2000 respondents collected information on self-assessed physical and mental health status based on the EQ-5D-5L framework, self-assessed longevity, retirement plans and financial preparedness and socioeconomic status. Multivariate ordered logistic regressions are used to identify the relationship between mental health status, financial preparedness for retirement and self-assessed longevity, as well as socioeconomic factors associated with mental health status and financial preparedness for retirement respectively. It is found that 59% of the respondents thought that they have not saved, or will not be able to save enough for their retirement. For these people, the odds of having less anxiety or depression are 0.36 (95% CIs: 0.16-0.43) times lower than those who are financially prepared. Having more external sources of financial assistance including family and governments, did not help ease mental distress. Rural people are half as likely to be financially prepared for retirement, regardless of whether they remain in rural areas or migrate to cities. Health promotion strategies should consider the role for financial planning in improving mental health.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.