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841.
Joaquín Castillo De Mesa Luis Gómez Jacinto Antonio López Peláez Maria De Las Olas Palma García 《Journal of Social Work Practice》2019,33(2):201-215
ABSTRACT Our current age of connectedness has facilitated a boom in interactive dynamics within social networking sites. It is, therefore, possible for the field of Social Work to draw on these advantages in order to connect with the unconnected by strengthening online mutual support networks among users. The aim of this article is to examine whether ‘connectedness’ in social networking sites improves online social capital and resilience of social service users. Through our analysis of social networks carried out on an experimental model, we observed the patterns of connectedness on Facebook of 50 social service end-users from Málaga, Spain. The detection of online communities through the modularity algorithm has allowed us to ascertain whether individuals’ offline realities mirror their online realities. At the same time, we examined the influence certain interactions (likes, comments, etc.) have on leadership through online ethnography. Finally, online social capital, understood as the combination of connectedness and online interaction, has been correlated with users’ resilience. The results reveal that both connectedness and interaction feed themselves and have correlations with resilience. 相似文献
842.
Desirée Villalta Lelys Guenni Yasmin Rubio-Palis Raúl Ramírez Arbeláez 《AStA Advances in Statistical Analysis》2013,97(2):151-171
Malaria is a parasitic infectious tropical disease that causes high mortality rates in the tropical belt. In Venezuela, Sucre state is considered the third state with most disease prevalence. This paper presents a hierarchical regression log-Poisson space-time model within a Bayesian approach to represent the incidence of malaria in Sucre state, Venezuela, during the period 1990–2002 in 15 municipalities of the state. Several additive models for the logarithm of the relative risk of the disease for each district were considered. These models differ in their structure by including different combinations of social-economic and climatic covariates in a multiple regression term. A random effect that captures the spatial heterogeneity in the study region, and a CAR (Conditionally Autoregressive) component that recognizes the effect of nearby municipalities in the transmission of the disease each year, are also included in the model. A simpler version without including the CAR component was also fitted to the data. Model estimation and predictive inference was carried out through the implementation of a computer code in the WinBUGS software, which makes use of Markov Chain Monte Carlo (MCMC) methods. For model selection the criterion of minimum posterior predictive loss (D) was used. The Moran I statistic was calculated to test the independence of the residuals of the resulting model. Finally, we verify the model fit by using the Bayesian p-value, and in most cases the selected model captures the spatial structure of the relative risks among the neighboring municipalities each year. For years with a poor model fit, the t-Student distribution is used as an alternative model for the spatial local random effect with better fit to the tail behavior of the data probability distribution. 相似文献
843.
844.
Juan M. Vilar-Fernández 《统计学通讯:模拟与计算》2013,42(2):311-334
The problem of predicting a future value of a time series is considered in this article. If the series follows a stationary Markov process, this can be done by nonparametric estimation of the autoregression function. Two forecasting algorithms are introduced. They only differ in the nonparametric kernel-type estimator used: the Nadaraya-Watson estimator and the local linear estimator. There are three major issues in the implementation of these algorithms: selection of the autoregressor variables, smoothing parameter selection, and computing prediction intervals. These have been tackled using recent techniques borrowed from the nonparametric regression estimation literature under dependence. The performance of these nonparametric algorithms has been studied by applying them to a collection of 43 well-known time series. Their results have been compared to those obtained using classical Box-Jenkins methods. Finally, the practical behavior of the methods is also illustrated by a detailed analysis of two data sets. 相似文献
845.
Illicit Financial Flows: Another Road Block to Human Development in Low- and Middle-Income Countries
Social Indicators Research - This article analysed the relationship between illicit financial flows (IFFs) and human development, as measured with the United Nations Human Development Index (HDI),... 相似文献
846.
Jorge Luis Bazán 《Journal of the Korean Statistical Society》2019,48(4):513-514
We give comments for the paper from Liu et al. (2019) about the Item Response Theory (IRT) model under consideration, the justification to compute Marginal likelihood, about what we learn with the data analysis performed and finally, about the computational issues in this paper. 相似文献
847.
It is widely argued that to be competitive, a company not only needs to focus on internal aspects but on the entire supply chain. Lean supply chain management has become a means of enhancing competitiveness by improving efficiency and increasing flexibility at all stages of the supply chain. This research develops and validates a lean supply chain management measurement instrument. A two-phase approach is used for scale development and refinement. In the first phase, a literature review is conducted to identify definitions of lean supply chain management and agile supply chain management and their corresponding measurement items. In the second phase, the lean supply chain management measurement instrument is validated using survey data based on scales developed in the first phase by 59 scholars with experience in lean management and/or supply chain management. The results provide a structured and comprehensive measure of lean supply chain management indicating that there are two differentiated dimensions in the measurement instrument: one related to the operational aspects of lean supply chain strategy implementation and the second related to lean supply chain planning. 相似文献
848.
849.
Alcalde Leandro Cassano María Julia Sánchez Rocío María Tenorio Ana Belén 《Urban Ecosystems》2019,22(6):1165-1172
Urban Ecosystems - The present work summarizes 10 years of field observations of an exurban squamate assemblage occupying a 1200 ha patch in the suburbs of La Plata City (Los... 相似文献
850.
Francisco J. González 《Studies in Gender and Sexuality》2019,20(3):159-164
This discussion of Daniel Butler’s article “Racialized Bodies and the Violence of the Setting” takes up the importance of the concept of place, largely through the lens of Frantz Fanon. It argues that being is best understood as being placed, emphasizing the necessity of material and historical setting for any ontological formation. Very tentatively, it advances a fragile hope that Whiteness is currently being placed in a way that can no longer be regarded as something universalized and invisible. 相似文献