婚姻挤压对农村男性生命质量的影响

本研究基于中国的性别失衡背景和在陕西省安康市汉滨区农村地区的调查数据分析婚姻挤压对农村男性生命质量的影响。描述性分析结果显示,28岁以上的未婚男性,其生命质量水平较低;无论处于何种年龄阶段和婚姻状态,感受到婚姻挤压的男性生命质量显著低于未感受到婚姻挤压的男性。回归分析结果显示,婚姻挤压感受和年龄对于男性生命质量均具有显著的独立影响,其影响方向与描述性分析结果一致。这说明婚姻挤压确实会显著降低农村男性的生命质量水平。     

Influence of a parking area on soils and vegetation in an urban nature reserve

We studied the influence of a car park on soil and vegetation within Richmond Park, UK, before and after imposition of fenced boundaries restricted public access. Soil and vegetation samples were taken before (once) and after (twice) access restrictions were enforced. The over-riding trend in all the data was for soil adjacent to the car park to be less acidic and more fertile than pristine local soils, accompanied by a more eutrophic grassland community (Lolium perenne/Trifolium repens, compared with Agrostis/Festuca grassland away from the car park). The chemical influence of the car park extended at least 50 m from its boundary. A common acidophilic collembole Folsomia quadrioculata was replaced by Cryptopygus thermophilus adjacent to the car park. There was little evidence from the vegetation data that car park closure benefitted the ecosystem, but chemical data showed signs of progressive recovery in the 2 years following restrictions. Possible explanations for the car park's influence on the local landscape are suggested to include calcareous chippings and canine faecal deposits.     

The effects of multiracial identification on students’ perceptions of racism

This paper compares the differing perceptions of racism reported by White (n = 222), Black (n = 99), and White–Black multiracial (n = 45) students at an urban campus of a Southern university. Using one-way analysis of variance (ANOVA), we examine the differences between the racial groups in three campus contexts—campus in general, with instructors, and with other students. Items chosen for analysis included behaviors or actions experienced by at least 4% of the respondents. In nearly all areas, the multiracial student group reported the most experience with prejudice. We employ standpoint theory to discuss these findings.     

A Class of Parametric Dynamic Survival Models

A class of parametric dynamic survival models are explored in which only limited parametric assumptions are made, whilst avoiding the assumption of proportional hazards. Both the log-baseline hazard and covariate effects are modelled by piecewise constant and correlated processes. The method of estimation is to use Markov chain Monte Carlo simulations Gibbs sampling with a Metropolis–Hastings step. In addition to standard right censored data sets, extensions to accommodate interval censoring and random effects are included. The model is applied to two well known and illustrative data sets, and the dynamic variability of covariate effects investigated.     

Efficient Algorithms for Local Alignment Search

We present efficient algorithms for local alignment search in biological sequences. These algorithms identify maximal segment pairs (MSPs). Our algorithms have the potential of performing better than BLAST (Basic Local Alignment Search Tool) and also are efficiently parallelizable. We employ Fast Fourier Transforms (FFTs). Though several attempts have been made in the past to employ FFTs in sequence analysis, they fail to capture local similarities. Our algorithms employ FFTs in a novel way to identify local similarities. FFT-based techniques have the attractive feature of benefiting from ultrafast special purpose hardware available for digital signal processing.