酒泉石大凹陷第三系储盖组合与勘探潜力分析

运用以基准面旋回为基础的层序地层学理论和分析方法,综合研究钻井、测井和二、三维地震资料,在酒泉盆地石大凹陷第三系火烧沟组和白杨河组中识别出3个层序界面,将其划分为1个超长期基准面旋回SLSC1和2个长期基准面旋回LSC1和LSC2。研究表明石大凹陷第三系SLSC1发育冲积扇沉积体系、辫状河沉积体系和滨浅湖沉积体系。在等时地层格架约束下,详细分析了其储集层、盖层及储盖组合的发育规律和分布特征与基准面旋回的内在联系,指出本区第三系仍具有较大的勘探潜力,有利储集体分别是位于LSC1基准面上升半旋回的冲积扇扇中和扇缘辫状水道砂以及位于LSC2基准面上升半旋回辫状水道砂,在平面上位于白南5井以北、单7井以南及白南2井以西冲积扇扇中与扇缘过渡区域为构造-岩性复合油气藏和构造背景上的岩性油气藏勘探的有利区域。     

From democratic participation to civic resistance: the loss of institutional trust as an outcome of activism in the refugee solidarity movement

Adding to the literature on non‐institutional political action and trust, this article argues that the loss of institutional trust is not only a cause but also an outcome of political activism. Studying the Danish refugee solidarity movement in a mixed‐methods research design including survey and qualitative interview data, the article shows that three kinds of activism – political activism, humanitarian activity, and civil disobedience – relate differently to the loss of trust in the institutions of the Parliament, the legal system, and the police. Political activism primarily affects a loss of trust in the Parliament due to low external efficacy and a closed political opportunity structure. Civil disobedience affects a loss of trust in the legal system and the police due to a perceived lack of procedural justice. Humanitarian activity does not affect a loss of institutional trust because it does not imply interaction with the institutions to the same extent as the other kinds of activism. The consequence of losing trust in the political institutions is not an abandonment of democratic values, nor political apathy, but rather a change in civic engagement from a mode of democratically legitimizing participation in the institutions to a mode of contending and questioning the legitimacy of the political institutions. This finding indicates that in turn loss of institutional trust may cause an increase in extra‐institutional political action which is consistent with the commonly assumed causality in the literature. This leads to a final integrating argument for conceptualizing activism and loss of institutional trust as reinforcing factors in a process where, in line with the main finding of this study, activism may cause a loss of institutional trust which, in turn, may cause additional activism, as argued in the existing literature.     

Racial Residential Segregation,Perceived Neighborhood Conditions,and Self-Rated Health: The Case of Houston,Texas

Previous research has linked racial residential segregation to a number of poor health outcomes. Yet, the mechanisms that could account for this association remain poorly understood and have seldom been empirically tested in the literature. In an analysis of the Houston area, we test one potential mechanism—perceived neighborhood conditions, as measured by two indices for neighborhood disorder and environmental quality. Using individual-level health data from a survey of Houston residents and neighborhood-level sociodemographic data from the U.S. Census, we estimate a series of multilevel models. We find that black and Latino segregation are linked to the perceived neighborhood disorder index, but no such relationship for the environmental quality index. Moreover, we find that both indices are related to poor self-rated health in that residents who evaluate their neighborhood conditions negatively are more likely to evaluate their health as poor. We also find a direct effect of black and Latino segregation on poor self-rated health, and that perceived neighborhood disorder partially mediates this relationship. We do not find a mediation effect for environmental quality. The results suggest that in order to improve the health of these communities, both residential segregation and neighborhood conditions need to be addressed.     

A comment on Wong and Waite, “Elder mistreatment predicts later physical and psychological health: Results from a national longitudinal study,” JEAN Issue 29(1), pp. 15–42

Wong and Waite present a longitudinal study of elder abuse and its effects. However, they contend that their data do not support the protective effects of social support, a finding in contrast with virtually all existing research on the topic. Closer inspection of their variables indicates that they misclassify elder abuse insofar as their results are actually in terms of only one type of elder abuse, psychological abuse, ignoring physical and sexual abuse. They also define “elder abuse” using only one question: “Is there anyone who insults you or puts you down?” Finally, they measure social support with the single item: “if they generally feel they can open up to, and rely on, these significant others.” It is not, therefore, surprising that they observed that social support was not protective considering health outcomes.     

School outcomes for homeless children: differences among sheltered,doubled-up,and poor,housed children

Some definitions of child homelessness include the category of children who are doubled-up with others due to loss of housing or economic hardship, while others do not. Are doubled-up children more like children in shelters or children who are poor but housed? A quasi-experimental comparison group design was used to test empirically for differences in school mobility, school attendance, and reading and mathematics achievement among three groups of sheltered, doubled-up, and poor, housed children, respectively, with each group containing 49 students. Sheltered students were found to have significantly higher levels of school mobility and significantly lower rates of school attendance than students in the other two groups. An elaboration of the continuum of risk model is proposed to differentiate experiences of sheltered and doubled-up students. Recommendations are made for policy responses as well as future research.     

Analyzing dependence in incidence of diabetes and heart problem using generalized bivariate geometric models with covariates

For analyzing incidence data on diabetes and health problems, the bivariate geometric probability distribution is a natural choice but remained unexplored largely due to lack of models linking covariates with the probabilities of bivariate incidence of correlated outcomes. In this paper, bivariate geometric models are proposed for two correlated incidence outcomes. The extended generalized linear models are developed to take into account covariate dependence of the bivariate probabilities of correlated incidence outcomes for diabetes and heart diseases for the elderly population. The estimation and test procedures are illustrated using the Health and Retirement Study data. Two models are shown in this paper, one based on conditional-marginal approach and the other one based on the joint probability distribution with an association parameter. The joint model with association parameter appears to be a very good choice for analyzing the covariate dependence of the joint incidence of diabetes and heart diseases. Bootstrapping is performed to measure the accuracy of estimates and the results indicate very small bias.     

Promoting low-income preschoolers’ school readiness through a text messaging intervention

The aim of the study is to evaluate the effects of a language-rich math content text message intervention as a way to promote child literacy outcomes for children enrolled in 15 Head Start centers participating in Jumpstart. Two-hundred and fifty-eight families were randomly assigned to treatment (language-rich math text) or control (information about kindergarten enrollment) conditions. Families received text messages in English, Spanish, or written Chinese. Parents reported on children’s fall entry skills and family demography. Teachers reported on children’s interest in math and literacy. Children were directly assessed on literacy skills to determine if the language-rich math content increased literacy skills. Structural equation models reveal no main effects for the sample of 258, but subgroup analyses by language show intervention effectiveness. For families receiving text messages in English, effectiveness depended on children’s fall letter and shape knowledge for increasing phonological awareness (English). The intervention appears most effective for Spanish-speaking families by increasing children’s math and literacy interest, definitional vocabulary, and print knowledge. Limitations and finding implications are discussed.     

Growing Up in A Single Mother Family and Student’s Tardiness: A Cross-National Study Exploring the Moderating Role of Family Resources

Research shows that growing up in a single-parent family has a negative effect on children’s educational level, whereas the relationship between family structure and test scores is less consistent or even nonexistent in some countries. Some authors suggested that something besides cognitive ability is responsible for the poorer school outcomes of children from nonintact families. In this study, we focus on a noncognitive outcome, in this case student tardiness, which is one of the components of problematic absenteeism. Using PISA 2003 data from Australia, Austria, Belgium, Canada, Denmark, Finland, France, Germany, Greece, Italy, New Zealand, Norway, Portugal, Spain, Sweden, the United Kingdom, and the United States, we find that children who grow up in a single-mother family have greater chances of arriving late for school in 16 of the 17 countries analyzed. Some studies have analyzed the extent to which the effect of growing up in a single-mother family is compensated by a high level of family resources. However, these yield mixed findings, which can be attributed to the differences between the countries studied. With the exception of Bernardi and Radl (2014), to our knowledge no study analyzes the heterogeneity of family structure effects using a cross-national approach. We find that in most of the 17 countries analyzed, a high level of family resources, such as home possessions, cultural resources, mother’s occupational and educational level, and mother’s type of work, do not compensate for the harmful effects of growing up in a single-mother family on children’s school tardiness.     

Individuals’ power and their social network accuracy: A situated cognition perspective

Individuals differ in how accurately they perceive their social environment, but research and theory provide conflicting predictions on whether powerful people are more or less accurate than others. Drawing on social network theory and the situated cognition theory of power, we examine the relationship between individuals’ formal and informal power and their perceptual accuracy of social network relationships. We propose that individuals’ perceptual accuracy is related to: 1) their formal and informal power in the organization; 2) the type of relationship being perceived (positive/negative valence) and its relevance to task and goal completion; and 3) the dependence relationship with the target of perception (i.e., whether the perceiver is dependent on the perceived to get their work done). Predictions were tested using cognitive social structure data collected from a technical call center. Results showed that power was generally linked to increased perceptual accuracy, particularly for the types of relationships most relevant for task and goal completion. We further demonstrated that social network accuracy was related to employees’ outcomes, including subsequent transfer, promotion, and exit from the organization.     

Analyzing multiple endpoints in a confirmatory randomized clinical trial—an approach that addresses stratification,missing values,baseline imbalance and multiplicity for strictly ordinal outcomes

Confirmatory randomized clinical trials with a stratified design may have ordinal response outcomes, ie, either ordered categories or continuous determinations that are not compatible with an interval scale. Also, multiple endpoints are often collected when 1 single endpoint does not represent the overall efficacy of the treatment. In addition, random baseline imbalances and missing values can add another layer of difficulty in the analysis plan. Therefore, the development of an approach that provides a consolidated strategy to all issues collectively is essential. For a real case example that is from a clinical trial comparing a test treatment and a control for the pain management for patients with osteoarthritis, which has all aforementioned issues, multivariate Mann‐Whitney estimators with stratification adjustment are applicable to the strictly ordinal responses with stratified design. Randomization based nonparametric analysis of covariance is applied to account for the possible baseline imbalances. Several approaches that handle missing values are provided. A global test followed by a closed testing procedure controls the family wise error rate in the strong sense for the analysis of multiple endpoints. Four outcomes indicating joint pain, stiffness, and functional status were analyzed collectively and also individually through the procedures. Treatment efficacy was observed in the combined endpoint as well as in the individual endpoints. The proposed approach is effective in addressing the aforementioned problems simultaneously and straightforward to implement.