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911.
Jesús J. Sánchez-Barricarte 《The History of the Family》2018,23(1):90-108
Using aggregated data from 25 developed countries over a lengthy period of time, this article presents a measure of the marriage boom observed in the twentieth century and an explanation for its causes. One of my main conclusions is that even though it basically developed after the Second World War, its origins are to be found before it. I found that, contrary to the views of some scholars, this boom was not a short-lived phenomenon, but actually lasted for 90 years on average. Using panel data analysis techniques, I am able to show that the rise in women’s education, state spending on social benefits, and larger percentages of people employed in the primary sector tended to discourage marriage. I also found a quadratic relationship between the nuptiality index and the per capita income and mortality rates. 相似文献
912.
This research evaluated whether adult morphological sex estimation methods of the innominate could be adapted and applied to subadults. The subpubic concavity, described by Phenice (1969) and revised by Klales et al. (2012), was modified for use with subadults. Two observers scored radiographic images from the PATRICIA database of 334 individuals of both sexes aged between 1.19 and 20.47 years. Score frequencies shifted from score 2 (straight) to higher frequencies of score 3 (convexity) in males and score 1 (concavity) in females with increasing age. Using ordinal logistic regression, sex classification was highest for the oldest age cohort at 97.2% and then decreased by age cohort. Interobserver error rendered a high level of agreement (0.806) using the intraclass correlation coefficient. Results indicate that the Klales method can be modified and applied to subadults to accurately estimate sex following the onset of puberty with a high degree of reliability and validity. 相似文献
913.
Talia Yolanda Marroquin Penaloza D.M.D. Shalmira Karkhanis Ph.D. Sigrid Ingeborg Kvaal Ph.D. Sivabalan Vasudavan D.M.D. Edwin Castelblanco BEcon. Estie Kruger D.M.D. Ph.D. Marc Tennant D.M.D. Ph.D. 《Journal of forensic sciences》2017,62(4):907-910
Dental age estimation becomes a challenge once the root formation is concluded. In living adults, one dental age indicator is the formation of secondary dentine, also associated with orthodontic treatment as well as root shortening. The aim of this study was to establish whether these secondary effects of orthodontic treatment could generate a statistically significant difference in dental age estimations when using Kvaal's method. The study sample included 34 pairs of pre‐ and postorthodontic panoramic radiographs, from different individuals with exactly the same age and sex distribution. Females 65%, median age 17.5 years, and males 35%, median age 22.5 years, were included. After data collection, dental age was estimated per tooth using formulae previously published. The risk of obtaining over‐estimation of age was calculated. (RR = 1.007). The changes caused by orthodontic treatment do not have any significant effect on age estimation when Kvaal et al.'s method is applied on panoramic radiographs. 相似文献
914.
Lindsey G. Roberts M.A. Jessica R. Spencer M.A. Gretchen R. Dabbs Ph.D. 《Journal of forensic sciences》2017,62(5):1145-1150
Forensic taphonomy explores factors impacting human decomposition. This study investigated the effect of body mass on the rate and pattern of adult human decomposition. Nine males and three females aged 49–95 years ranging in mass from 73 to 159 kg who were donated to the Complex for Forensic Anthropology Research between December 2012 and September 2015 were included in this study. Kelvin accumulated degree days (KADD) were used to assess the thermal energy required for subjects to reach several total body score (TBS) thresholds: early decomposition (TBS ≥6.0), TBS ≥12.5, advanced decomposition (TBS ≥19.0), TBS ≥23.0, and skeletonization (TBS ≥27.0). Results indicate no significant correlation between body mass and KADD at any TBS threshold. Body mass accounted for up to 24.0% of variation in decomposition rate depending on stage, and minor differences in decomposition pattern were observed. Body mass likely has a minimal impact on postmortem interval estimation. 相似文献
915.
916.
童玉芬 《中国劳动关系学院学报》2021,35(4):15-25
人口普查不仅可以为人口研究,而且可以为国家制定相关的经济社会发展政策提供数据支撑,具有重要的意义.根据第七次全国人口普查资料,结合历年人口统计和以往各次普查数据,研究对中国最新人口态势和特点进行了详细的归纳与分析,发现我国人口的最新变化主要体现为:全国人口规模继续增长,但增长速度和幅度持续放缓,并向零增长和负增长趋近;... 相似文献
917.
针对利用鞋底痕迹长减系数法推断遗留人身高在实际工作中存在的弊端,通过对常见鞋种随机取样,进行认真的实验研究,得出了不同鞋种更为准确的系数,突破了过去笼统的四种鞋子幅度比较大的选取系数造成推断误差较大的做法,为足迹教学内容的不断更新完善和实际部门利用此公式推断作案人身高提供了较好的参考系数。 相似文献
918.
陈正 《陕西行政学院学报》2007,21(4)
人口、资源、环境构成生态环境系统的基本要素,对人口与生态环境现状的评价可以通过分析人口与资源、环境协调发展现状来实现。运用指标体系综合评价方法分析,陕西人口与资源协调发展水平越好,人口发展对生态环境脆弱性影响越小;反之影响越大。 相似文献
919.
从粤港澳人口流动及其管理的历史、现状及其发展趋势考虑,为了实现两制下三地人口合理的长期流动和共同发展,需要充分加强政府合作和政策对接,调整赴港澳定居人口的素质比例,深化深圳、珠海特区职能,同时,采取相应的户籍管理政策,保证新移民在内地继续生活、工作的环境。 相似文献
920.
天水市劳动人口就业形势分析 总被引：1，自引：0，他引：1
劳动就业形势分析可以为改善劳动力结构及分布提供依据。本文就天水市劳动就业的基本情况对天水市劳动人口的数量、质量、行业分布及三次产业分布进行了就业的变化分析。 相似文献