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排序方式: 共有825条查询结果,搜索用时 15 毫秒
731.
我国国民健康满意度的调查与分析   总被引:1,自引:1,他引:1  
通过对全国14个省市不同类别人口进行了健康满意度社会调查,调查结果显示:第一,我国国民对健康满意度处于较低水平,"非常满意"和"满意"之和为59.3%;对个人未来健康期望度较高,为70.5%.与社会发展的其他指标满意度比较,对"我国人口健康"满意度在社会发展的19项指标中,排在第18位.满意度最低的是对"我国人口素质",排在第19位.第二,健康满意度越高,对社会和生活的满意度也越高.第三,国民对体育活动开展的满意率远远低于对体育与健康的期望率,多数国民对我国体育活动的开展情况处于不满意或模糊的状态,而对体育的期望值很高.  相似文献   
732.
    
Query suggestion is a common feature of many information search systems. While much research has been conducted about how to generate suggestions, fewer studies have been conducted about how people interact with and use suggestions. The purpose of this paper is to investigate how and when people integrate query suggestions into their searches and the outcome of this usage. The paper further investigates the relationships between search expertise, topic difficulty, and temporal segment of the search and query suggestion usage. A secondary analysis of data was conducted using data collected in a previous controlled laboratory study. In this previous study, 23 undergraduate research participants used an experimental search system with query suggestions to conduct four topic searches. Results showed that participants integrated the suggestions into their searching fairly quickly and that participants with less search expertise used more suggestions and saved more documents. Participants also used more suggestions towards the end of their searches and when searching for more difficult topics. These results show that query suggestion can provide support in situations where people have less search expertise, greater difficulty searching and at specific times during the search.  相似文献   
733.
There is widespread agreement that early intervention for children with visual impairments and their families is important and beneficial. However, few con- trolled prospective studies of the effectiveness of various types of early intervention have been completed with these children. This randomized study evaluated the immediate and long-term effects of a comprehensive, weekly homebased intervention for infants and toddlers with visual impairments, compared with a low-intensity treatment through parent group meetings offered approximately 12 times per year. In annual assessments conducted for t h e years after the intervention was begun, there were negligible statistically significant or practical differences between groups based on a variety of measures of child and family functioning. In light of the cost-effectiveness analyses reported, questions are raised about the type of early intervention that should be provided to children with visual impairments.  相似文献   
734.
A diversity of sources of literature encompassed by the management disciplines appears to result in a growing need for a systematic methodology to map the territory of management theory. As such, when scoping out a study, structured literature review (SLR) can be considered as a means by which any critical, central literature might be considered. However, there is little guidance, or evidence, of this being undertaken for the purposes of small scale projects such as undergraduate or masters' dissertations. This paper reports four case studies of master's degree students following management programmes of undertaking a structured literature review (SLR) and the issues and problems they had to encounter during their journey. The findings from the case studies suggest that in terms of time to complete and the volume of output required in terms of word count, Tranfield, et al's (2003) approach to SLR's, whilst suited to doctoral level research is not appropriate generally when dealing with undergraduate and masters research projects. Therefore, this paper provides accounts of the experiences of four students who undertook SLR for their undergraduate or master's degree dissertation. The paper identifies that these students had to deal with a new set of conceptual problems relating to this "unorthodox" approach to a postgraduate research dissertation in coming to terms with new paradigms of enquiry that are not normally taught as part of a traditional research methods course. This was despite gaining a greater depth of insight into the subject area through a more rigorous and structured manner. The paper presents alternative remedies by way of a rapid structured literature review (RSLR) model. This would appear to be more appropriate to the conducting of small scale literature based research projects when used with undergraduate and master's degree students than SLR identified for other research activities.  相似文献   
735.
  总被引:2,自引:0,他引:2  
Using data from the National Household Education Survey of 1995, this paper links family income, ethnicity, and child’s age to child care characteristics such as type of setting, hours spent in nonparental care, and number of care arrangements. Findings indicate that children from families with incomes that are at least twice the poverty threshold are more likely than other children to be in nonparental care and generally spend more hours in nonparental care. Ethnicity, not poverty, is related to use of relative-care; Black infants and toddlers are more likely to be in relative-care than White or Hispanic infants and toddlers, regardless of poverty status. Few income, ethnicity, or age differences emerged in analyses of characteristics parents prefer in the selection of type of care. The type of care a family uses is related to the extent to which the family values a setting that will care for sick children and values having a care provider with training.  相似文献   
736.
737.
    
ABSTRACT

The surface texture of a stone represents a sensitive parameter in evaluating its conservation state. In monuments and sculptures, in fact, external agents continuously alter the appearance of stones, determining peculiar weathering patterns and modifying properties such as retention of water and particles, interaction with light, color, and finishing. The application of protective coatings also determines changes in surface appearance of a stone, usually evaluated and monitored by color change tests. Surface metrology methods offer the possibility to quantify these changes, evaluating the impact of external agents (natural, i.e. weathering, and artificially, i.e. protective coatings) on natural stones. In this research, we demonstrate the potential of surface areal measurements in describing the evolution of weathering processes and the effects of protective treatments on porous stone materials. The obtained results suggest that the extent of the modifications is related to the scale of observation (small- vs. large-scale undulations, i.e. roughness and waviness, respectively), with an overall increase of surface roughness as the weathering proceeds. Unexpectedly, coatings based on nanoparticle dispersions increase the topographic height parameters, due to the absence of a homogeneous film.  相似文献   
738.
    
Abstract

The aim of this study was to examine participant and scheme characteristics in relation to access, uptake, and participation in a physical activity referral scheme (PARS) using a prospective population-based longitudinal design. Participants (n = 3762) were recruited over a 3-year period. Logistic regression analyses identified the factors associated with the outcomes of referral uptake, participation, and completion (≥80% attendance). Participant's age, sex, referral reason, referring health professional, and type of leisure provider were the independent variables. Based on binary logistic regression analysis (n = 2631), only primary referral reason was associated with the PARS coordinator making contact with the participants. In addition to the influence of referral reason, females were also more likely (odds ratio 1.250, 95% confidence interval 1.003 – 1.559, P = 0.047) to agree to be assigned to a leisure provider. Referral reason and referring health professional were associated with taking up a referral opportunity. Older participants (1.016, 1.010 – 1.023, P < 0.001) and males were more likely to complete the referral. In conclusion, the PARS format may be less appropriate for those more constrained by time (women, young adults) and those with certain referral reasons (overweight/obesity, mental health conditions). More appropriate targeting at the point of referral could improve participation rates by revealing or addressing barriers that might later result in dropout.  相似文献   
739.
    
Darwin's theory of evolution claimed that only the strongest, most adaptable species survive. Until recent years, the business models in higher education never really came into question. Now the merging of affordability, access, and outcomes is forcing colleges and universities to face the reality that consumers are shopping for the value of a college degree. The current structure of a tuition‐driven model where tuition outpaces inflation is one that cannot be sustained by many institutions across the country. These factors, along with others, are forcing higher education to adapt and change in ways that are at the very least uncomfortable and, at worst, unachievable.  相似文献   
740.
    
This study investigates the links between race, school choice and educational stratification in South Africa. It focuses on racial differences in families’ efforts to take advantage of choice by transferring to opportunity (i.e., transferring to a school perceived to offer students better access to educational opportunity than their current school) and explores the implications of those transfers for emerging patterns of racial stratification in access to high quality schools. Findings reveal significant racial variation in transfers to opportunity and suggest a complex link between race and the ways in which historically disadvantaged groups have engaged with the post-apartheid educational opportunity structure.  相似文献   
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