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1.
This study investigates the relationship between motivation, leadership and social media use among a sample of public relations practitioners who recently had begun using Twitter to follow Universal Accreditation Board (UAB)-affiliated organizations. A majority of the survey respondents were classified as “everyday users.” A series of Twitter leadership indicators correlated positively with internal motivation and correlated negatively with amotivation. Several word-of-mouth variables also were investigated with regard to motivation.  相似文献   
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This study examined the impact of information subsidies on media coverage during a crisis. Using the July 2006 Israel–Lebanon conflict as a backdrop, this research reviewed access that U.S. military public affairs officers provided the media and analyzed subsequent coverage for the presence of the military's message. Coverage was more neutral to positive than negative. Items containing organizational messages were more positive; those quoting practitioner-facilitated sources introduced organizational messages into coverage and generated more positive coverage. Access to information subsidies had a positive impact on coverage and aided in the successful transfer of attribute salience from practitioners to the media.  相似文献   
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Spatial variation in soil inorganic nitrogen across an arid urban ecosystem   总被引:4,自引:1,他引:3  
We explored variations in inorganic soil nitrogen (N) concentrations across metropolitan Phoenix, Arizona, and the surrounding desert using a probability-based synoptic survey. Data were examined using spatial statistics on the entire region, as well as for the desert and urban sites separately. Concentrations of both NO3-N and NH4-N were markedly higher and more heterogeneous amongst urban compared to desert soils. Regional variation in soil NO3-N concentration was best explained by latitude, land use history, population density, along with percent cover of impervious surfaces and lawn, whereas soil NH4-N concentrations were related to only latitude and population density. Within the urban area, patterns in both soil NO3-N and NH4-N were best predicted by elevation, population density and type of irrigation in the surrounding neighborhood. Spatial autocorrelation of soil NO3-N concentrations explained 49% of variation among desert sites but was absent between urban sites. We suggest that inorganic soil N concentrations are controlled by a number of ‘local’ or ‘neighborhood’ human-related drivers in the city, rather than factors related to an urban-rural gradient.  相似文献   
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Drawing on social schema theory ( Fiske & Taylor, 1991 ) and social identity theory ( Tajfel & Turner, 1979 ), this study examined the impact on teachers’ reactions to children's aggression of three variables, two of which were related to the aggressors and one was related to the teachers. Experienced female elementary school teachers (N =90) each read a scenario that described an aggressive episode committed by a group of boys against a boy from another class. The aggressors were either good or bad children, who were either popular or unpopular with their classroom peers. In addition, the scenario manipulated the teachers’ identification with, or commitment to, the class to be either high or low. Analysis of the teachers’ ratings of causal responsibility, liking, and recommended punishment revealed a consistent negative response from the teachers towards the aggressors versus the victim. However, the teachers’ responses were also interactively influenced by the aggressors’ goodness and popularity, as well as the teachers’ class identification. The results are discussed in relation to other findings on teachers’ responses to school aggression and bullying, as well as how their responses might best be explained.  相似文献   
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The Balanced Budget Act of 1997 dramatically decreased reimbursements for traditional Medicare home health patients. A multivariate analysis of Medicare Current Beneficiary Survey data showed that African American and “other” users experienced greater decreases in home care between 1996 and 1998 than did White users. These results suggest (a) race/ethnicity is an independent factor in determining service use post-BBA and (b) health policy has a disparate impact on minority older adults. Capitated payment systems must be pursued cautiously to avoid negative effects on vulnerable populations. The potential for current and future Medicare policy changes to negatively affect vulnerable populations is also discussed.  相似文献   
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State-controlled media use similar message techniques to target specific publics that counterparts in democratic societies use. We explore talking points (attributes) and themes (frames) through content analysis in state-produced propaganda directed at two different audiences. Domestic and internationally targeted propaganda (N = 1491) from Iran regarding the issue of regional security was reviewed. Results indicated Iran emphasized different attributes and frames based on audiences. Themes about enemy correlated, and relationships between officials and themes were explored.  相似文献   
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