Asymptotic properties of a generalized regression-type predictor of a finite population variance in probability sampling

A system of predictors for estimating a finite population variance is defined and shown to be asymptotically design-unbiased (ADU) and asymptotically design-consistent (ADC) under probability sampling. An asymptotic mean squared error (MSE) of a generalized regression-type predictor, generated from the system, is obtained. The suggested predictor attains the minimum expected variance of any design-unbiased estimator when the superpopulation model is correct. The generalized regression-type predictor and the predictor suggested by Mukhopadhyay (1990) are compared.     

行动研究--欺负干预的适宜运作模式

行动研究是一种新的研究思路.与传统的科学研究不同,行动研究集行动和研究于一体.在行动研究中,实际工作者是研究的主体,他们通过对自己实际工作情境的研究以达到解决实际问题和促进个人成长的目的.     

On Approximability of Boolean Formula Minimization

For a Boolean function given by a Boolean formula (or a binary circuit) S we discuss the problem of building a Boolean formula (binary circuit) of minimal size, which computes the function g equivalent to , or -equivalent to , i.e., . In this paper we prove that if P NP then this problem can not be approximated with a good approximation ratio by a polynomial time algorithm.     

Kumulation von Mikrodaten – Konzeptionelle Grundlagen und ein Vorschlag zur Realisierung

Zusammenfassung: In dieser Studie wird ein Konzept zur Kumulation von laufenden Haushaltsbudgetbefragungen im Rahmen des Projektes Amtliche Statistik und sozioökonomische Fragestellungen entwickelt und zur Diskussion gestellt. Dafür werden die theoretischen Grundlagen und Bausteine gelegt und die zentrale Aufgabe einer strukturellen demographischen Gewichtung mit einem Hochrechnungs–/Kalibrierungsansatz auf informationstheoretischer Basis gelöst.Vor dem Hintergrund der Wirtschaftsrechnungen des Statistischen Bundesamtes (Lfd. Wirtschaftsrechnungen und EVS) wird darauf aufbauend ein konkretes Konzept für die Kumulation von jährlichen Haushaltsbudgetbefragungen vorgeschlagen. Damit kann das Ziel einer Kumulation von Querschnitten mit einer umfassenderen Kumulationsstichprobe für tief gegliederte Analysen erreicht werden. Folgen sollen die Simulationsrechnungen zur Evaluation des Konzepts.

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Summary: In this study a concept for cumulating periodic household surveys within the frame of the project Official Statistics and Socio–Economic Questions is developed and asks for discussion. We develop the theoretical background and solve the central task of a structural demographic weighting/calibration based on an information theoretical approach.Based on the household budget surveys of the Federal Statistical Office (Periodic Household Budget Surveys and Income and Consumption Sample (EVS)) a practical concept is proposed to cumulate yearly household surveys. This allows a cumulation of cross–sections by a comprehensive cumulated sample for deeply structured analyses. In a following study this concept shall be evaluated.

     

Semiparametric Inference Methods for General Time Scale Models

In this paper we consider semiparametric inference methods for the time scale parameters in general time scale models (Oakes, 1995, Duchesne and Lawless, 2000). We use the results of Robins and Tsiatis (1992) and Lin and Ying (1995) to derive a rank-based estimator that is more efficient and robust than the traditional minimum coefficient of variation (min CV) estimator of Kordonsky and Gerstbakh (1993) for many underlying models. Moreover, our estimator can readily handle censored samples, which is not the case with the min CV method.     

城市残疾人社会救助问题研究——以贵阳市为个案

残疾人社会救助是目前解决我国城市残疾人问题的最直接的办法.但在实施城市残疾人社会救助过程中存在着救助水平低、标准不统一、救助政策和执行机构以及残疾人自身素质局限性等问题,由此引发了一些新矛盾和负面影响.因此,建立社区残疾人自治组织和经常性社会捐助渠道、健全社会救助实施情况的监督检查机制,有利于完善我国城市残疾人社会救助体系并使之发挥"社会稳定器"和"社会安全网"的作用.     

大学生失恋心理危机干预:基于失恋心理发展的阶段性特征和易感性研究

探讨大学生失恋心理发展的确认期、刨根问底期、再表达期、讨价还价期和接受期等5个阶段的特征和危机表现,分析失恋大学生心理危机的易感性因素,在此基础上探讨建立包含预警体系、评估体系、救助与治疗体系、帮扶与阻控体系的大学生失恋心理危机干预体系。     

Admissible minimum bias estimation of response surfaces

The minimum bias estimator was introduced as an alternative to the least squares estimator for approximating response functions by low-order polynomials. Here we show how to obtain an admissible estimator with smaller squared bias.     

Family Intervention and Services for Persons with Mental Illness in the People's Republic of China

ABSTRACT

Family services and intervention for persons with mental illness is crucial in mental health services. In this paper, the writer attempts to describe family intervention and services for persons with mental illness in the People's Republic of China. Family intervention and services like home-based care, guardianship network, family counseling, and psychoeducational programs are only preliminarily developed. Their effectiveness and challenges in future development are discussed.     

Steps in the Right Direction,Against the Odds,An Evaluation of a Community‐Based Programme Aiming to Reduce Inactivity and Improve Health and Morale in Overweight and Obese School‐Age Children

The study describes an evaluation of a 48‐week physical activity and nutritional education programme for overweight/obese school‐age children using quantitative and qualitative methods. The majority of participants were obese or severely obese when enrolled, and while some improvements in body mass index, self‐esteem and engagement in a range of physical activities were noted, difficulties in evaluating a complex community‐based intervention were highlighted. Children, parents and health professionals described a range of benefits from attending the programme but more intensive services are likely to be needed for the most seriously obese children and for those families resisting intervention.