The relationship between lifetime health trajectories and socioeconomic attainment in middle age

A large literature demonstrates the direct and indirect influence of health on socioeconomic attainment, and reveals the ways in which health and socioeconomic background simultaneously and dynamically affect opportunities for attainment and mobility. Despite an increasing understanding of the effects of health on social processes, research to date remains limited in its conceptualization and measurement of the temporal dimensions of health, especially in the presence of socioeconomic circumstances that covary with health over time. Guided by life course theory, we use data from the British National Child Development Study, an ongoing panel study of a cohort born in 1958, to examine the association between lifetime health trajectories and socioeconomic attainment in middle age. We apply finite mixture modeling to identify distinct trajectories of health that simultaneously account for timing, duration and stability. Moreover, we employ propensity score weighting models to account for the presence of time-varying socioeconomic factors in estimating the impact of health trajectories. We find that, when poor health is limited to the childhood years, the disadvantage in socioeconomic attainment relative to being continuously healthy is either insignificant or largely explained by time-varying socioeconomic confounders. The socioeconomic impact of continuously deteriorating health over the life course is more persistent, however. Our results suggest that accounting for the timing, duration and stability of poor health throughout both childhood and adulthood is important for understanding how health works to produce social stratification. In addition, the findings highlight the importance of distinguishing between confounding and mediating effects of time-varying socioeconomic circumstances.     

民族互嵌社区精准治理的理论向度与实践路径——以贵州省兴义市S街道社区为例

民族互嵌社区是中华民族多元一体格局空间场域延展的实践形态,是对“各民族相互嵌入式的社会结构和社区环境”这一时代命题的现实阐释。现代城市社区功能的集聚和细化为民族互嵌的再造及重释提供了场域空间,由于民族互嵌社区具有公共性、聚合性和互动性的本质特征,从而形成了立体化嵌套结构,催生出精准互嵌理论和实践的“双重愿景”:理论层面,要深刻把握民族互嵌社区精准治理的目标向度、方法向度、内容向度;实践层面,要精准识别民族互嵌社区的场域情境,以智能技术描绘民族互嵌过程的“全景图”和“晴雨表”,通过社区制度体系的精准供给,提升民族互嵌社区精准治理的效能。     

Random effects regression mixtures for analyzing infant habituation

Random effects regression mixture models are a way to classify longitudinal data (or trajectories) having possibly varying lengths. The mixture structure of the traditional random effects regression mixture model arises through the distribution of the random regression coefficients, which is assumed to be a mixture of multivariate normals. An extension of this standard model is presented that accounts for various levels of heterogeneity among the trajectories, depending on their assumed error structure. A standard likelihood ratio test is presented for testing this error structure assumption. Full details of an expectation-conditional maximization algorithm for maximum likelihood estimation are also presented. This model is used to analyze data from an infant habituation experiment, where it is desirable to assess whether infants comprise different populations in terms of their habituation time.     

国家权力与城市空间:当代中国城市基层社会治理变革

确立和调整城市治理的空间策略是现代国家的重要任务。改革前中国的单位体制,使国家能够依靠单位实现“单元分隔”式的治理模式。改革以来,这种整齐划一的空间战略无法适应新的城市社会变迁。在城市社区管理体制改革中,出现了三种不同的国家空间战略,即“政党国家”,“行政国家”和“社会化国家”模式。当前城市社区改革的困难和复杂性体现了以上三种空间战略的对立和冲突。     

从杜夫海纳的困境中突围——《审美经验现象学》中的文学作品理论

作为现象学美学经典文本的《审美经验现象学》对审美活动进行了深入的剖析,但令人遗憾的是,杜夫海纳在该书中却回避了对同为艺术作品的文学作品的分析,这种回避源自杜夫海纳对于语言优先性的坚持。如果从语言的陈述性入手,或许可以为文学理论的构建提供一个新的思路。     

Fuzzy K-means clustering models for triangular fuzzy time trajectories

We focus our attention on the classification of fuzzy time trajectories with triangular membership function, described by a given set of individuals. To this purpose, we adopt a fullyinformational approach, explicitly recognizing the informational nature shared by the ingredients of the classification procedure: the observed data (Empirical Information) and the classification model (Theoretical Information). In particular, by supposing that the informational paradigm has a fuzzy nature, we suggest three fuzzy clustering models allowing the classification of the triangular fuzzy time trajectories, based on the analysis of the cross sectional and/or longitudinal characteristics of their components (centers and spreads). Two applicative examples are illustrated.     

创新活动的思维机制

创新思维是具有实践性、整合性和开创性的思维 ,创新的思维发生主要表现在 :发现导致创新的问题 ,想象可能创新的空间 ,洞察推出创新的机遇 ,反馈动态创新的信息。创新思维是在不确定、不完全信息、博弈行为中展开的。创新思维要开发隐含知识和利用软件系统     

Stories of Non‐Becoming: Non‐Issues,Non‐Events and Non‐Identities in Asexual Lives

In contrast to conventional models of positively “becoming” an identity through social interaction, this article explores the inverse, negational process of “non‐becoming,” whereby actors start but do not continue along an identity career trajectory. Through cumulative attrition, interactions and encounters at key moments create an overall pattern of non‐progression. Using asexuality as an example, we identify three main trajectory stages of non‐awareness, communicative negation and non‐consolidation, each involving interactional contingencies. With a wider applicability to other repudiated identities, this model shows how even negational symbolic social objects (non‐issues, non‐events, and non‐identities) are constituted through social interaction.     

The reproductive health indices and sex hormone levels in middle-aged and elderly Chinese men

Objective: The aim of this study was to analyze the age-related recession trajectory of reproductive health indices in middle-aged and elderly Chinese men.

Methods: A population-based cross-sectional study was conducted in Jiashan County, Zhejiang in 2012. Healthy men between 40 and 80 years of age were considered eligible for the study. Physical examination and the sex hormones were measured. The subjects were assessed based on the 5-item version of the International Index of Erectile Function (IIEF-5) for Erectile Dysfunction (ED), and Aging Males’ Symptoms (AMS) scale for Symptomatic Late-Onset Hypogonadism (SLOH).

Results: TG showed a decrease at age 60 years. Testis volume and TT did not show significant difference among the four age groups; cFT began to decrease at age 50 years and Bio-T decreased faster at age 50 years. SHBG and LH increased faster at age 50 and 70 years, respectively. IIEF5 score decrease faster at age 60 years. AMS scores increased faster at age 70 years. With the increase in age, the symptoms of ED and SLOH became severer.

Conclusion: Different indices on reproductive health of men showed turning points at different ages. At first, androgenic sex hormones decreased faster, and then erectile dysfunction got severer, and the last overall male syndromes declined.     

General C. L. Chennault

Because of recent legislation, many students with mild disabilities enroll in high school social studies courses in general education rather than special education settings. Therefore, teachers may have students with learning disabilities, behavioral disorders, communication disorders, and attention deficit/hyperactivity disorder in their history, geography, economics, and political science courses. Typical characteristics of these students include lowlevel reading and writing skills, processing problems, memory disorders, language problems, organizational deficits, and behavioral problems. These characteristics present challenges for the students and social studies teachers; however, there are strategies that will help the students succeed. The author summarizes the disability categories and related characteristics and describes textbook, writing, memory, organizational, and instructional modifications to address the challenges.