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91.
92.
A population sample registry for public health survey investigations: methods,lessons, and successes
Katherine A. James Arnold H. Levinson Yaqiang Li Carsten Baumann Ali Maffey 《International Journal of Social Research Methodology》2018,21(5):565-574
Public health relies on sample surveys to monitor the health of populations and investigate factors that contribute to population health and illness. Such investigations require surveying individuals who are selected in ways that support statistical inference to the population. Faced with rising costs and declining participation, survey researchers are exploring economical ways to recruit samples that validly represent larger populations. The current report describes an innovative resource, the Colorado Adult Population Sample–Survey Research Registry, which maintains survey access to respondents from a probability-based state health survey. We describe recruitment and retention strategies, explore representativeness, report several studies that used the registry, and discuss future directions. 相似文献
93.
Kingsley Purdam 《International Journal of Social Research Methodology》2016,19(2):257-267
Conducting social science research is a complex process, and social science students face a number of learning challenges in order to develop their skills. Moreover, new sources and types of data including so-called big data are providing new opportunities for research, but also pose methodological challenges. In this article, we explore a task-based learning approach for teaching social science research methods. We draw on evidence from two case study learning tasks: (i) the collection and analysis of Twitter data; and (ii) designing and conducting a face-to-face and online survey. The students were guided to co-lead the tasks, apply their knowledge and then to critically reflect. The pedagogical framework of task-based learning provides opportunities to embed learning in new ways by integrating knowledge, practice and critical reflection. Task-based learning can create a dynamic learning environment and can empower students to develop their identities as researchers. 相似文献
94.
Giulia Carabelli 《Journal of youth studies》2016,19(8):1110-1127
This article discusses the findings of the Imagine Sheppey project (2013–2014) which studied how young people are ‘oriented’ towards the future. The aim and approach of the project were to explore future imaginaries in a participatory, experimental, and performative way. Working with young people in a series of arts-based workshops, we intervened in different environments to alter the space as an experience of change – temporal, material, and symbolic. We documented this process visually and made use of the images produced as the basis for elicitation in focus groups with a wider group of young people. In this article we discuss young people's future orientations through the themes of reach, resources, shape, and value. In so doing, we reflect on the paths that our young respondents traced to connect their presents to what is next, what we call their modes of present–future navigation. We explore the qualities and characteristics of their stances within a wider reflection about how young people approach, imagine, and account for the future. 相似文献
95.
96.
Systematic triangulation may address common challenges in evaluation, such as the scarcity or unreliability of data, or the complexities of comparing and cross-checking evidence from diverse disciplines. Used to identify key evaluation findings, its application has proven to be effective in addressing the limitations encountered in country-level evaluation analysis conducted by the Independent Evaluation Office of the Global Environment Facility (GEF). These include the scarcity or unreliability of national statistics on environmental indicators and data series, especially in Least Developed Countries; challenges in evaluating the impacts of GEF projects; and inherent difficulties in defining the GEF portfolio of projects prior to the undertaking of the evaluation. In addition to responding to the need for further developing triangulation protocols, procedures and/or methodologies advocated by some authors, the approach offers a contribution to evaluation practice. This applies particularly to those evaluation units tasked with country-level evaluations in international organizations, facing similar constraints. 相似文献
97.
Dafydd Evans 《统计学通讯:模拟与计算》2016,45(3):863-879
Given a noisy time series (or signal), one may wish to remove the noise from the observed series. Assuming that the noise-free series lies in some low-dimensional subspace of rank r, a common approach is to embed the noisy time series into a Hankel trajectory matrix. The singular value decomposition is then used to deconstruct the Hankel matrix into a sum of rank-one components. We wish to demonstrate that there may be some potential in using difference-based methods of the observed series in order to provide guidance regarding the separation of the noise from the signal, and to estimate the rank of the low-dimensional subspace in which the true signal is assumed to lie. 相似文献
98.
向宗平 《高等函授学报(社会科学版)》2014,(10):66-69
本文分享了作者在美国研修期间亲身经历的体现真实性学习理念的三种教学方法与活动:同伴教学、跨时空对话、视频制作。通过真实再现纽约州立大学奥斯威戈分校研修课堂精彩片段,分析教学方法与原理,并探讨在国内高校尤其是教师教育课堂的应用途径。 相似文献
99.
Henri E. Cuny 《统计学通讯:模拟与计算》2016,45(5):1748-1762
Understanding how wood develops has become an important problematic of plant sciences. However, studying wood formation requires the acquisition of count data difficult to interpret. Here, the annual wood formation dynamics of a conifer tree species were modeled using generalized linear and additive models (GLM and GAM); GAM for location, scale, and shape (GAMLSS); a discrete semiparametric kernel regression for count data. The performance of models is evaluated using bootstrap methods. GLM was useful to describe the wood formation general pattern but had a lack of fitting, while GAM, GAMLSS, and kernel regression had a higher sensibility to short-term variations. 相似文献
100.
张天熙 《宝鸡文理学院学报(社会科学版)》2012,32(2):115-116,119
武术的动作都要求具有攻防技击特点,无论是套路演练形式,还是技击格斗形式,都是以踢、打、摔、拿、击和刺等技击法为主要内容。在教学过程中,对攻防实用技术、组织与教法的研究,应有它一套独特方法。从一般教学过程到特有的组织方法,以及必须坚持的几项原则进行学术探讨,对改革课堂教学模式,优化教学方法,提高技术功作质量,圆满地完成教学任务起着积极重要的作用。 相似文献