A method for computing the autocovariance of renewal processes

In this paper we derive formulae for the autocovariance functions of renewal and renewal reward processes. The derivation is based on a Poissonization technique of a renewal process. The formulae are expressed in the form of Laplace transforms. In some cases we may invert the Laplace transforms analytically, but in general we have to invert them numerically.     

Poverty affects access to regular source of primary care among the general population in Hong Kong

A territory‐wide two‐stage stratified random sample of 2,282 community‐dwelling Hong Kong adults were surveyed between 2014 and 2015 to investigate the association between poverty and regular source of primary care utilization. Poverty was operationalized by income‐poverty and deprivation. About 94% of our sample reported having regular source of primary care (Western and/or Chinese medical practitioner) and about 69% among them were in private sector. Multivariable logistic regression showed that people who were income‐poor and deprived were less likely to have regular source of primary care (income‐poor: OR = 0.523, p = .027; deprived: OR = 0.488, p = .007) and visit private primary care doctors (income‐poor: OR = 0.445, deprived: OR = 0.222, both p < .0001). Those who had chronic diseases were more likely to have regular source of primary care (multimorbid: OR = 10.709, p < .0001), but less likely to access care in the private sector (one chronic disease: OR = 0.690, p = .019; multimorbid: OR = 0.374, p < .0001) than those without. Further, being older and less skilled were significantly associated with less likelihood of visiting a private doctor. Path analysis showed that the number of chronic diseases had significant indirect effect on having regular source of primary care with being income‐poor and deprived as the mediators (β = ?.0183, p = .0016). Therefore, despite a public health‐care system that aims to deny no one from adequate health care for lack of means, regular source of primary care in Hong Kong is found to be pro‐rich. Future policies should tackle the problem of health‐care inequalities to meet the needs of the underprivileged.     

Estimation for varying coefficient partially nonlinear models with distorted measurement errors

In this paper, we propose a new varying coefficient partially nonlinear model where both the response and predictors are not directly observed, but are observed by unknown distorting functions of a commonly observable covariate. Because of the complexity of the model, existing estimation methods cannot be directly employed. For this, we propose using an efficient nonparametric regression to estimate the unknown distortion functions concerning the covariates and response on the distorting variable, and further, we obtain the profile nonlinear least squares estimators for the parameters and the coefficient functions using the calibrated variables. Furthermore, we establish the asymptotic properties of the resulting estimators. To illustrate our proposed methodology, we carry out some simulated and real examples.     

The Characteristics of Child Sexual Abuse in the School Environment in Turkey

School may represent a protective factor, boosting the mental health of the student body, while also representing a risk factor that heightens the potential for mental health problems. The present study aims to identify the individual and familial characteristics associated with the incidents of child sexual abuse (CSA) in Turkey’s school environment. The incidents involving school-related CSA constituted 5.6% (N = 125) of 2,238 cases. The following was discovered: an adult committed the majority (64%) of CSA in the school environment; most adult perpetrators were teachers (62.5%). This study determined that the perpetrators manipulated the victims via methods that included physical abuse (11.2%), threats (19.2%), tricks/deception (15.2%), and taking photographs/videos with sexual content (3.2%); and CSA incidents involved intercourse (15.2%); and almost three-quarter of the victims of CSA in the school environment reported the incident late. This study indicates that peer perpetrators abuse younger victims and a greater proportion of male victims relative to adult perpetrators. In light of these findings, school security must be improved, especially in public schools, and trainings aimed at preventing bullying and sexual abuse (SA) should be given to all school staff, students, and parents.     

Additive time-dependent hazard model with doubly truncated data

For doubly truncated data, i.e. the variables of interest are only observable if they lie in a certain random interval, an additive hazard model with time-dependent regression coefficients is investigated. Consistency and asymptotic normality are proven under mild assumptions. A simulation study investigates the finite sample properties and the influence of the truncation distribution on the estimation error. Finally, the method is applied to a doubly truncated data set of German companies, where the age at insolvency is of interest.     

Exposing School Employee Sexual Abuse and Misconduct: Shedding Light on a Sensitive Issue

ABSTRACT

While the media continue to report incidents of school employee sexual misconduct, few empirical studies focus on this issue. To address this gap in the literature, expand knowledge and awareness around the problem, and inform future research and programs, this research intends to document and analyze the characteristics of school employee sexual misconduct cases reported in the media. The authors conducted a landscape analysis of 361 published school employee sexual misconduct cases in the United States from 2014, documenting factors such as offender and victim characteristics, type of incident, technology use, location of offense, and resulting disciplinary actions by schools and law enforcement. These analyses showed that offenders were most often male and general education teachers, with approximately a quarter identified as athletic coaches. Offenders’ average age was 36 years, while the average age of victims was 15. More than half of incidents took place at school or school-related events. Results also showed that school employee sexual misconduct incidents most often involved physical contact; however, technology (i.e., cell phones, computers, cameras/video recorders, and storage devices) played an important role in three out of four cases. Finally, analyses of the criminal and school-related consequences showed that over half of offenders were placed on administrative leave or resigned immediately following their arrest and almost all were convicted of their crimes. Additional findings concerning this topic are also reported in this article.     

Emotional school engagement among minority youth: the relevance of cultural identity,perceived discrimination,and perceived support

ABSTRACT

Minority student school dropout represents a challenging issue for educational systems in many countries. Notwithstanding minority families' overall high academic aspirations, there is a stable achievement gap between majority and minority students. Minority students who are emotionally engaged with their school tend to be psychologically and socioculturally better adapted to their country of residence and, as a result, report higher academic success. Therefore, emotional school engagement represents a relevant factor for integration into the host society. The goal of this paper is to investigate the interrelation between ethnic and national identity, perceived discrimination, and perceived support from parents, peers, and teachers with emotional school engagement. Results indicate that cultural capital within the family, cultural self-identification, and perceived support from peers and teachers play an important role for students’ emotional school engagement.     

Critical Literacy as a Lens for Students’ Evaluation of Sources in an AP World History Class

Abstract

Critical literacy is an appropriate learning outcome for social studies courses because it has the potential to teach students how to critically evaluate sources of information relevant to historical texts and current news media. The purpose of this qualitative case study is to examine the process through which students learned to apply critical literacy strategies while completing an end-of-unit research project in tenth grade AP world history. This study looks as student and teacher interviews to examine how students use critical literacy approaches and perspectives to analyze texts. As a result of this study it was determined that: (1) students at the elite private school had limited experience with source evaluation and critical literacy prior to this research project, (2) critical literacy served as an effective evaluation tool for reliability and bias for some students, (3) certain students experienced challenges in using critical literacy as an evaluation tool, and (4) students believed that critical literacy would benefit them personally and academically. Results include implications for instructors who wish to teach critical literacy and source evaluation in this information age.     

中小学语文教材中关于“希望就是力量”的内涵阐释——以人教版新课标教材为例

中小学语文教材中蕴涵着丰富的“希望就是力量”的内涵，对青少年学生潜移默化地传递着正能量，启迪着每个学生对自己充满信心，对未来充满希望，激励着学生努力奋斗，超越自我。研究发现：小学低年级教材中关于“希望就是力量”的内涵主要注重启迪，小学高年级则开始兼顾实践行动，中学则注重引导学生形成关于希望品质的积极人生观。     

琼南地区黎族中学生学习动机问卷的初步编制

本文对琼南地区黎族中学生学习动机问卷初步编制的相关问题加以论述。