犀利的锋芒隽永的语言——试论塞缪尔·约翰逊及其《致切斯特菲尔德伯爵书》

约翰逊之所以成为18世纪下半叶英国文坛的领袖人物,除了其过人的学识、口才、写作能力以外,与其卓尔不群的品格也是分不开的。著名的《致切斯特菲尔德伯爵书》在揭穿切斯特菲尔德伯爵沽名钓誉的过程中,不仅显露了约翰逊高度说理的才智,也展现了其卓越的语言才华。     

语文教学中工具性与人文性统一的思考与实践

一、现象点击语文教学中的工具性和人文性问题,是进入课改以来语文教师关注的热点问题。的确,纵观历史,从“双基”的提出,“基础知识”与“基本技能”的落实与培养,到“培养能力,发展智力”的要求。总的来说,语文教学过于强调了工具性的一面,把语文课程知识化,更多地注意体现语     

应用现代教育技术提高教育教学质量

随着信息科学和信息技术广泛地融入现代教育之中,传统教育技术与现代教育技术构成了教育技术的整体。教师应该不断提高应用现代教育技术的思想理念,这是对应用好现代教育技术,提高教育教学的重要保障。掌握现代教育技术的基础知识和操作技能,适应现代教育技术的要求;积极做好现代教育技术培训工作,保证现代教育技术的顺利应用;充分应用现代教育技术手段,教学效果显著,与世界先进教育技术接轨;充分发挥现代教育技术优势,从而促进教育教学质量的提高。信息时代崭新技术与传统教育技术有机结合的现代教育技术将会支撑起新世纪的教育天地。     

墨子教育思想解读

墨子是一位影响世界发展的伟大教育家之一,其教育思想在历史上有一定意义。开创了“义务教育”的先河。墨子在《墨子·所染》中以染为喻,指出人接受什么教育,便会被什么感化。教育的成败对于一个人来说关乎能否成才(济人),对于一个国家来说关乎盛衰和民族的存亡(救世),这就是墨子主张的“学而优则世”。可见墨子对教育的作用的认识是有独到之处的。     

Safety climate and safety outcomes: A meta-analytic comparison of universal vs. industry-specific safety climate predictive validity

Previous research has demonstrated that safety climate is a robust predictor of safety-related outcomes. However, there is little consensus about the optimal strategy to measure safety climate. One of the main issues has been whether safety climate measures should be universal or industry-specific. As such, this study was designed to examine the criterion-related validity of universal and industry-specific safety climate measures by conducting a meta-analytic comparison of their relationships with a variety of safety-related outcomes (i.e. safety behaviour, risk perceptions, accidents and injuries, and other adverse events). With 120 independent samples (N?=?81,213), we found that the industry-specific safety climate measures displayed better predictive power when predicting safety behaviour and risk perceptions than the universal safety climate measures. On the other hand, the universal safety climate measures displayed better predictive power when predicting other adverse events (but not accidents and injuries) than the industry-specific safety climate measures. We discuss these findings in light of the intended use of organisational safety climate surveys.     

A Semi‐parametric Transformation Frailty Model for Semi‐competing Risks Survival Data

In the analysis of semi‐competing risks data interest lies in estimation and inference with respect to a so‐called non‐terminal event, the observation of which is subject to a terminal event. Multi‐state models are commonly used to analyse such data, with covariate effects on the transition/intensity functions typically specified via the Cox model and dependence between the non‐terminal and terminal events specified, in part, by a unit‐specific shared frailty term. To ensure identifiability, the frailties are typically assumed to arise from a parametric distribution, specifically a Gamma distribution with mean 1.0 and variance, say, σ². When the frailty distribution is misspecified, however, the resulting estimator is not guaranteed to be consistent, with the extent of asymptotic bias depending on the discrepancy between the assumed and true frailty distributions. In this paper, we propose a novel class of transformation models for semi‐competing risks analysis that permit the non‐parametric specification of the frailty distribution. To ensure identifiability, the class restricts to parametric specifications of the transformation and the error distribution; the latter are flexible, however, and cover a broad range of possible specifications. We also derive the semi‐parametric efficient score under the complete data setting and propose a non‐parametric score imputation method to handle right censoring; consistency and asymptotic normality of the resulting estimators is derived and small‐sample operating characteristics evaluated via simulation. Although the proposed semi‐parametric transformation model and non‐parametric score imputation method are motivated by the analysis of semi‐competing risks data, they are broadly applicable to any analysis of multivariate time‐to‐event outcomes in which a unit‐specific shared frailty is used to account for correlation. Finally, the proposed model and estimation procedures are applied to a study of hospital readmission among patients diagnosed with pancreatic cancer.     

Non-parametric tests for the tail equivalence via empirical likelihood

In this paper, the problem of whether the left tail and the right tail of a distribution share the same extreme value index (EVI) is addressed and we propose two different test statistics. The first one is based on the result of the joint asymptotic normality of the two Hill estimators for the EVIs of both tails. And therefore, we can construct a quotient-type test statistic, which is asymptotic χ²(1) distributed after some standardization. The second test statistic proposed in this paper is inspired by the two-sample empirical likelihood methodology, and we prove its non parametric version of Wilk’s theorem. At last, we compare the efficiencies of our two test statistics and the maximum likelihood (ML) ratio test statistic proposed by Jondeau and Rockinger (2003 Jondeau, E., Rockinger, M. (2003). Testing for differences in the tails of stock-market returns. J. Empirical Finance 10:559–581.[Crossref] , [Google Scholar]) in terms of empirical first type error and power through a number of simulation studies, which indicate that the performance of the ML ratio test statistic is worse than our two test statistics in most cases.     

Multi-dimensional functional principal component analysis

Functional principal component analysis is one of the most commonly employed approaches in functional and longitudinal data analysis and we extend it to analyze functional/longitudinal data observed on a general d-dimensional domain. The computational issues emerging in the extension are fully addressed with our proposed solutions. The local linear smoothing technique is employed to perform estimation because of its capabilities of performing large-scale smoothing and of handling data with different sampling schemes (possibly on irregular domain) in addition to its nice theoretical properties. Besides taking the fast Fourier transform strategy in smoothing, the modern GPGPU (general-purpose computing on graphics processing units) architecture is applied to perform parallel computation to save computation time. To resolve the out-of-memory issue due to large-scale data, the random projection procedure is applied in the eigendecomposition step. We show that the proposed estimators can achieve the classical nonparametric rates for longitudinal data and the optimal convergence rates for functional data if the number of observations per sample is of the order \((n/ \log n)^{d/4}\). Finally, the performance of our approach is demonstrated with simulation studies and the fine particulate matter (PM 2.5) data measured in Taiwan.     

Perception of and reactions to job insecurity: The buffering effect of secure attachment

By bridging attachment theory and cognitive appraisal theory, this study explored the moderating role of secure attachment in one’s perception of (i.e. primary appraisal) and reactions to (i.e. secondary appraisal) job insecurity. Study 1 used individual-level data collected from employees nested in 42 states in the US and state-level unemployment rate derived from U.S. Bureau of Labor Statistics. I found that secure attachment attenuated the negative impact of state-level unemployment rate on individual job insecurity. In Study 2 with data collected at two time points, I found that secure attachment mitigated the negative, lagged outcome of job insecurity on job satisfaction (but not affective commitment). Taken together, I found that secure attachment enabled individuals to positively appraise state-level unemployment rate and constructively cope with job insecurity. Results of both studies converge to support the proposed buffering role of secure attachment in one’s perception of and reactions to job insecurity.     

Fungal community composition analysis of 24 different urban parks in Shanghai,China

Urban Ecosystems - Urban parks are an important constituent of cities; they harbour microbial diversity which plays a key role in soil ecosystem functioning. The bacterial diversity of many urban...