The asymptotic distribution of the partial attributable risk in cross-sectional studies

The partial attributable risk (PAR) has been introduced as a tool for partitioning the responsibility for causing an adverse event between various risk factors. It has arisen from epidemiology, but it is also a valid general risk allocation concept, which can, for example, be applied to data from customer satisfaction surveys. So far, a variance formula for the PAR has been missing so that the confidence intervals were not directly available. This paper provides the asymptotic normal distribution for the PAR determined from a cross-sectional study.     

A Comparison of Bayes Factors for Separated Models: Some Simulation Results

Some alternative Bayes Factors: Intrinsic, Posterior, and Fractional have been proposed to overcome the difficulties presented when prior information is weak and improper prior are used. Additional difficulties also appear when the models are separated or non nested. This article presents both simulation results and some illustrative examples analysis comparing these alternative Bayes factors to discriminate among the Lognormal, the Weibull, the Gamma, and the Exponential distributions. Simulation results are obtained for different sample sizes generated from the distributions. Results from simulations indicates that these alternative Bayes factors are useful for comparing non nested models. The simulations also show some similar behavior and that when both models are true they choose the simplest model. Some illustrative example are also presented.     

Kinship Reconsidered: Research on a Neglected Topic

This article reviews the recent history of kinship research, noting the relative neglect of the topic in recent decades. The lack of scholarly and empirical work on kinship has been hampered by both the absence of survey and qualitative research on contemporary kinship practices. The author focuses on what is known and not known about how individual put into practice kinship in the standard, nuclear form of the family. There is surprising in attention to the ceremonial family and, little is know about how families draw boundaries and construct kinship on ritual occasions in the literature. The author concludes by suggesting research strategies for examining both how kinship is constructed and practiced in the United States and in other advanced economies.     

Decrypting cultural nuances: using drama techniques from the theatre of the oppressed to strengthen cross cultural communication in social work students

ABSTRACT

Despite widening participation in social work education in the UK, social work students from black and minority ethnic (BME) backgrounds can find that they have less positive experiences on social work courses than their counterparts. This can happen when courses do not equip students to navigate the subtle rules of communication with service users that are premised on dominant UK values. As a consequence BME students can be assessed as having poor interpersonal skills and poor skills in engaging service users. However, the issue is often more one of cultural differences and high expectations of cultural integration than one of incompetence.

This paper reports on a drama workshop using techniques from the Theatre of the Oppressed to foster awareness of the complexities of cross cultural communication that BME students may face. The workshop facilitates insight into the nuances of culturally informed values that differ from dominant UK values.

Drawing on student workshop evaluations, the authors highlight the positive use of techniques from the Theatre of the Oppressed as a pro-active pedagogical approach to equipping BME students with insight and skill to circumnavigate cross cultural communication in practice and develop awareness of empowering strategies to combat negative paradigms about BME cultures.     

几个玉米自交系农艺性状的配合力分析

采用Griffing完全双列杂交方法 4对西南农业大学农学系新选育的 7个玉米自交系单株产量、穗长、穗重、穗粗、穗位高、株高进行了一般配合力和特殊配合力的测定。结果表明 :这 6个性状组合间都存在显著差异 ;一般配合力高的自交系其特殊配合力也高。其中 ,产量的一般配合力以丙 1 0最高 ,SS1 - 1 8×丙 1 0的产量特殊配合力最高。     

SC2053在川西化杀杂种小麦组合筛选中的应用初报

报道了我所利用SC2 0 53在杂种小麦研究中的应用情况。研究认为 :①多数小麦品种在剂量为 0 .6kg/hm2 ,雌雄蕊原基形成期至药隔期喷施 ,杀雄率能达 95%以上。药隔期为喷施临界期。品种、喷药剂量与喷药时期存在互作。②气候条件的改变对不同小麦品种生育进程的影响有差异。在杂交小麦制种中应对此加强研究 ,以利于花期调节。③在配制组合时 ,应特别注意抗性材料的选用。④超标优势明显的化杀杂种小麦 ,其优势主要表现在穗部性状上 ,尤其是穗粒数优势     

Multivariate bandwidth selection for local linear regression

The existence and properties of optimal bandwidths for multivariate local linear regression are established, using either a scalar bandwidth for all regressors or a diagonal bandwidth vector that has a different bandwidth for each regressor. Both involve functionals of the derivatives of the unknown multivariate regression function. Estimating these functionals is difficult primarily because they contain multivariate derivatives. In this paper, an estimator of the multivariate second derivative is obtained via local cubic regression with most cross-terms left out. This estimator has the optimal rate of convergence but is simpler and uses much less computing time than the full local estimator. Using this as a pilot estimator, we obtain plug-in formulae for the optimal bandwidth, both scalar and diagonal, for multivariate local linear regression. As a simpler alternative, we also provide rule-of-thumb bandwidth selectors. All these bandwidths have satisfactory performance in our simulation study.     

“教康整合”理念下特殊教育职前师资培养模式探析

学校教育的根本目的是学生的发展,而学生发展的首要条件是教师的发展。因而,特殊教育师资的成长发展是提升特殊教育品质的前提与保障。然而,特殊儿童的发展不仅依托于教育、教师的发展,还需要医疗康复的介入。鉴于特殊儿童康复的需要,而医生缺位、教育人员康复知识技能欠缺的现状,教育界和医学界普遍达成了“教康整合”的理念。众高校也响应这一理念,陆续提出新专业整合型教师的师资培养模式。     

Nadaraya–Watson estimator for I.I.D. paths of diffusion processes

This paper deals with a nonparametric Nadaraya–Watson (NW) estimator of the drift function computed from independent continuous observations of a diffusion process. Risk bounds on the estimator and its discrete-time approximation are established. The paper also deals with extensions of the PCO and leave-one-out cross-validation bandwidth selection methods for our NW estimator. Finally, some numerical experiments are provided.