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The authors examined factors influencing the return rates for attempting to collect active parental consent forms from 21,123 students in the 7th through 10th grades in 41 middle and high schools. Overall return rates from middle schools were higher than from high schools. Schools that offered high levels of staff support for collecting consent forms had higher return rates. Procedures where the consent form was attached to a school form that parents had to complete and return to the school yielded the highest return rate. Implications for how researchers can obtain a high parent consent form return rate are discussed.  相似文献   
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Tobacco use among youth remains one of our nation's most significant public health problems, and yet available evidence from prevention and cessation person-centered approaches has been mixed. Given these disappointing outcomes, some have recommended more public health approaches, and these include tobacco sales-to-minors and possession-use-purchase laws. While community members and police officials have endorsed these types of public health initiatives, many within the public health community have been either guarded or even oppositional to such approaches. The primary reasons for this controversy are reviewed in this article. Outcome studies indicate that sales-to-minors laws can be an effective step toward the reduction of youth access to commercial sources of tobacco. However, even with these laws in place, many youth indicate that they continue to have easy access to tobacco, often by means of social sources. Advocates of these approaches have argued that more comprehensive public health interventions are needed, such as programs that combine youth access and possession-use-purchase laws. This article reviews the ongoing debate behind these types of public health efforts, and examines the evidence of such programs to reduce youth tobacco use.  相似文献   
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Researchers face considerable ambiguity and controversy regarding the issue of informed consent. Decisions about consent procedures can affect study participation rates and prevalence estimates among specific populations. Changing from passive to active parental consent procedures was examined in a case study with an anonymous survey of sixth- through eighth-grade students' substance use. Four types of procedures for obtaining parental consent were examined. Results suggest that certain types of consent procedures can yield high levels of participation. This study also demonstrates that low participation rates with some active consent procedures can cause biases in sample characteristics and outcome data.  相似文献   
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The present brief report followed children exposed to consequences for violating Purchase, Use, and Possession (PUP) laws over time to assess changes in their smoking status. Youth in 24 towns were surveyed once a year for 3 years, and rates of tobacco use for those fined for PUP law violations were assessed. Of those who were given a ticket for a PUP law violation, 35 (39%) reported not smoking during year 1. Students in grade 7 were more likely to have quit smoking (84%) than those in grade 8 (35%), grade 9 (32%), or grade 10 (21%). For the two follow-up years, 45% and 41% reported not smoking. Assuming those who attrited were smokers, it is possible that about 15% to 24% of the original sample of children cited actually quit smoking over the follow-up period. The implications of these findings are discussed.  相似文献   
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The issue of localisation motives is one of the key topics in attracting and motivating MNEs to establish or enhance their R&D activities abroad. The paper aims to compare localisation motives for R&D investment of multinational enterprises in the new and old EU member regions and to find out main localization motives differences among them. We have found out the key motives were technology/supply side factors, which strongly influence decision-making at MNEs in locating and maintaining R&D in all regions. In the more developed regions, the localisation is positively influenced also by the presence of other important/large (high-tech) companies and important universities in the region, which provide relevant services to MNEs. Localisation decisions in the new EU member regions were positively influenced particularly by presence of a quality and cheap labour force and a suitable R&D infrastructure and experience in R&D in these regions. Considerable differences between the old and new EU member states reflects their distinctive economic history, recent re-opening of their economies and consequences of the process of post-communist transition.  相似文献   
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Youth access to tobacco remains a significant problem for this nation. Methods have been developed to reduce youth access to commercial outlets and these involve enforcement efforts of monitoring and fining merchant offenders. In the present study, over a three year period of time, readiness to participate in these types of enforcement programs were assessed in 11 communities. Several years after the research study was completed, enforcement activities were re-assessed. Findings indicated that those communities that had made the largest changes in community readiness to enforce youth access laws during the three year intervention were the ones most likely to continue enforcement activities into the follow-up period. There is a need to better understand how youth access to tobacco community-based interventions can be maintained.  相似文献   
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