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21.
The aim of this study was to evaluate the effects of the introduction of a job rotation model on supermarket cashiers, with respect to psychophysiological stress reactions, muscle activity of the trapezius muscle (which covers the upper back, the neck and the shoulder), and musculoskeletal symptoms in the neck and shoulders. Thirty-one female cashiers were investigated before and after job rotation was introduced. Before the reorganization the participants were only performing cash register work at the checkout counters. After the reorganization they shifted between cash register work and work in different departments in the supermarket. At follow-up the participants, all right-handed, had a significantly lower diastolic blood pressure, and surface electromyography (EMG) showed a significantly decreased muscle activity in the trapezius muscle on the left side. Musculoskeletal symptoms of the neck and shoulders were only partly changed, and there was no change in prevalence of musculoskeletal pain, which was around 70%. From questionnaires, but not from self-ratings during work, it was found that the introduction of job rotation had been experienced as positive in several regards, although the perceptions of stress and hurry were the same at follow-up.  相似文献   
22.
The means, motives, and opportunity of cooperation must be present if organizations are to establish mutual ties. Public benefit and conflict oriented organizations are hypothesized to have stronger motives for cooperation than member benefit and consensus oriented groups, and organizations with broad activity scope are likely to face more opportunities of cooperation than specialized organizations. These hypotheses are strengthened by results from regression analyses. The article further shows a historical decline in both the motives and opportunities for such cooperation in the case of Norway through processes of depoliticization, individualization, and specialization. Thus, here, the preconditions for cooperation within organizational society are gradually deteriorating. Such developments are likely to weaken the interconnectedness of voluntary organizations and the potential micro, meso, and macro benefits of such ties.  相似文献   
23.
Dag Tj⊘stheim 《Statistics》2013,47(3):249-284
Measures of dependence and resulting tests of independence are surveyed. Measures arising both from linear and nonlinear modeling are examined. Tests based on chaos theory are briefly discussed. The main emphasis, however, is on some recently developed nonparametric tests using estimated distribution and density functions. Most of the paper is phrased in terms of serial dependence for a univariate stationary time series, but it is indicated how more general situations can be analysed. The bootstrap is an essential tool for determining the critical value of the new tests.  相似文献   
24.
It is well known that the Curse of Dimensionality causes the standard Kernel Density Estimator to break down quickly as the number of variables increases. In non-parametric regression, this effect is relieved in various ways, for example by assuming additivity or some other simplifying structure on the interaction between variables. This paper presents the Locally Gaussian Density Estimator (LGDE), which introduces a similar idea to the problem of density estimation. The LGDE is a new method for the non-parametric estimation of multivariate probability density functions. It is based on preliminary transformations of the marginal observation vectors towards standard normality, and a simplified local likelihood fit of the resulting distribution with standard normal marginals. The LGDE is introduced, and asymptotic theory is derived. In particular, it is shown that the LGDE converges at a speed that does not depend on the dimension. Examples using real and simulated data confirm that the new estimator performs very well on finite sample sizes.  相似文献   
25.
Box–Cox power transformation is a commonly used methodology to transform the distribution of the data into a normal distribution. The methodology relies on a single transformation parameter. In this study, we focus on the estimation of this parameter. For this purpose, we employ seven popular goodness-of-fit tests for normality, namely Shapiro–Wilk, Anderson–Darling, Cramer-von Mises, Pearson Chi-square, Shapiro-Francia, Lilliefors and Jarque–Bera tests, together with a searching algorithm. The searching algorithm is based on finding the argument of the minimum or maximum depending on the test, i.e., maximum for the Shapiro–Wilk and Shapiro–Francia, minimum for the rest. The artificial covariate method of Dag et al. (2014) is also included for comparison purposes. Simulation studies are implemented to compare the performances of the methods. Results show that Shapiro–Wilk and the artificial covariate method are more effective than the others and Pearson Chi-square is the worst performing method. The methods are also applied to two real-life datasets. The R package AID is proposed for implementation of the aforementioned methods.  相似文献   
26.
Summary.  We propose an adaptive varying-coefficient spatiotemporal model for data that are observed irregularly over space and regularly in time. The model is capable of catching possible non-linearity (both in space and in time) and non-stationarity (in space) by allowing the auto-regressive coefficients to vary with both spatial location and an unknown index variable. We suggest a two-step procedure to estimate both the coefficient functions and the index variable, which is readily implemented and can be computed even for large spatiotemporal data sets. Our theoretical results indicate that, in the presence of the so-called nugget effect, the errors in the estimation may be reduced via the spatial smoothing—the second step in the estimation procedure proposed. The simulation results reinforce this finding. As an illustration, we apply the methodology to a data set of sea level pressure in the North Sea.  相似文献   
27.
Public Organization Review - As part-time employed spends less time in the organization than full-time employed, the result will probably be less affective commitment to the organization (AOC),...  相似文献   
28.
For the Norwegian economy, 2003–2013 was a period of large growth and big business cycle fluctuations. The aggregate uv-curve reflects this and shows a reduction in both the vacancy rate and the unemployment rate from 2003 to 2013, suggesting improved labour market matching over the period. The inclusion of Eastern European countries in the European Union in 2004 and 2007 caused an increasing influx of foreign job seekers. I quantify regional and occupational mismatch, and make a distinction between natives and immigrants. Indicators show no reduction in mismatch over time, which therefore cannot account for the increased labour market efficiency that the uv-curve suggests. However, ‘footloose’ immigrants seem to have adapted better than ‘rooted’ natives to the structure of labour demand in the regional dimension, and thus to have contributed to a lower level of mismatch than would have resulted without immigrants. In the occupational dimension immigrants made no significant difference. Levels and differences in employment and unemployment among and between immigrants and natives were not well explained by their education levels or types.  相似文献   
29.
Dag Balkmar 《Mobilities》2018,13(5):717-732
This article focuses on violence(s) in traffic space as a gendered problem. It draws upon qualitative online studies and interviews with cyclists about their experiences of motorists’ violent practices, including cyclists’ negotiations of anti-cyclist discourses and their coping strategies. It is argued that automobility makes it possible for certain men to perform their ‘right to the road,’ including gender-identity-shaping practices, and that this has the negative effect of violating cyclists’ bodily integrity. It follows that a shift from cars to more sustainable mobilities also demands related shifts in masculinities and men’s practices in the context of transport and traffic.  相似文献   
30.
This qualitative case study aimed to explore environmental circumstances and interactional processes that appeared to be relevant for the dynamics of resilience in adolescents exposed to child abuse. Fieldwork at a learning and coping centre for children and their families was combined with semi-structured interviews with adolescent participants aged 12 to 18 years. A critical realist approach was used to unpack what has been called the ‘ordinary magic’ of resilience. We found that intensively validating qualities of both the environment and relationships seemed to be driving components for resilience. Borrowing ideas from the sociometer theory, we propose that particularly the consistent intensiveness may offer a recalibration of the adolescents' immediate life-worlds, in terms of how they perceive the people they meet and the environments they step into. In keeping with the transactional-ecological model of resilience, we suggest that such a recalibration leads to altered social agency that becomes visible through their immediate social participation.  相似文献   
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