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1.
This article provides new empirical evidence on the impact of emigration on human capital formation by drawing upon the exodus of Russian scientists after the end of the Soviet Union. I create a novel panel data set based on scientific publications to identify former Soviet scientist émigrés and official Russian statistics on the production of PhDs aggregated at the regional and scientific field levels. I show that the emigration of scientists in the post‐Soviet period is associated with lower production of PhDs measured by admissions, graduates, and the number of students. The results suggest that emigration is not increasing investment in human capital at the PhD level. Possible explanations are that there is a lack of mentors to train the next generation of PhD students and that émigrés are acting as a channel for the younger generation to pursue PhD studies abroad.  相似文献   
2.
This study examined the characteristics of youth with different types of purpose in life, as well as the associations between adolescents’ life satisfaction, purpose in life, meaning in life, social support, and problematic digital use. The sample included 193 participants aged 14–18 who completed self-report questionnaires on life satisfaction, purpose in life, meaning in life, social support, and problematic digital use. The following purpose in life clusters were found: (1) other-oriented goals (n?=?33); (2) self-oriented goals (n?=?42); and (3) both other- and self-oriented goals (n?=?107). Adolescents with both self- and other-oriented goals had significantly higher life satisfaction, meaning in life, and social support compared to the other groups. Meaning in life and greater support from parents and teachers were significantly associated with greater life satisfaction. In addition, having other-oriented goals was associated with lower life satisfaction. Finally, support from parents (p?=?0.05) mediated the association between problematic digital use and life satisfaction. Findings are discussed in light of previous research and the theoretical and practical implications are examined.  相似文献   
3.
Microforms     
Abstract

The editors scan approximately 140 journals in all disciplines for reviews of serial publications. Journals published since January 2000 were monitored for this installment of Serials Review Index. Suggestions for journals to be included in future columns are welcome. Serials Review 2002; 28:57–62.  相似文献   
4.
The influence of the social situation on the physical distance and, as measured by a questionnaire, emotional intimacy between participants was experimentally studied (N = 90) in a cooperative, a competitive, and a neutral social situation. Results indicate that the physical distance was greatest under neutral conditions. The cooperative condition produced the strongest feeling of intimacy. It is argued that the neutral condition is irrelevant to the participants’ behaviour and level of attention to other persons. Further, intimacy can only arise if an interaction is both positive and relevant. The correlation between physical and emotional distance turned out to be relatively small, in accordance with the range usually given for attitudebehaviour correlations.  相似文献   
5.
The aims of this study were (1) to analyze the sport participation in a cohort of community-dwelling elderly people in Germany and (2) to evaluate associations between sport participation, sociodemographic factors, cardiovascular risk factors, and health status. In a monitored prospective cohort study (getABI), 6,880 unselected patients ≥65 years have been followed up by 344 general practitioners beginning in 2001. As part of the 5-year follow-up telephone interview, a sample of 1,376 participants was interviewed on sport participation. The association between participation in at least one sporting activity (“sporty” yes/no) during the past week (cycling) or month (other sports) and the following parameters was analyzed by logistic regression: age, sex, immigration background, education, waist circumference, smoking, self-reported health, history of vascular events, diabetes mellitus, lipometabolic disorder, and arterial hypertension. Analysis of activities (n = 1,304; median age 76 (70–94) years; 55.1% women) showed that 27.6% of participants rode a bicycle during the previous week. During the previous month, 24.9% of participants did gymnastics or strength training, and 16.5% swam. Of all participants, 53.8% were sporty. Multivariate analysis revealed several independent factors to be associated with being sporty (p < 0.05): younger age, male sex, higher education, nonsmoking, better self-reported health, and not being diagnosed with diabetes. Immigration background, waist circumference, history of vascular events, lipometabolic disorder, and hypertension did not show a statistically significant association (p ≥ 0.05) with sport participation. Summing up, the most frequently performed sporting activities were cycling, gymnastics or strength training, and swimming. Sport participation was associated with, for example, age and sex.  相似文献   
6.
One maxim of career is “the lower the pitch of voice the higher the income.” In this regard Voice-Coaching is of definite interest especially for women in business. This article focuses on small-group coaching, a holistic approach combining Voice and Psychology. The course includes abdominal breathing to improve both the sound of the voice and self-assurance in presentations; the use of the natural pitch of the voice; dynamics of voice; care of the voice for professional speakers and improvised speaking. In addition to the exercises, the participants are encouraged to reflect on their own experience of “social stage” in business, their social roles and opportunities to exert their influence and improve the image they portray.  相似文献   
7.
Based on data of the 2009 German Volunteer Survey (“Freiwilligensurvey”) the paper analyses whether there is evidence for a discrimination of women in filling management positions in the volunteer sector. It turns out that women have a significant lower propensity to take up an unpaid volunteer management position. This correlation is also robust when we control for self-selection bias as well as certain important socio-demographic, socio-economic and volunteer-specific determinants. Further on we can show that this kind of gender-specific discrimination can be found particularly in leisure-time clubs and religious organisations. These results indicate that structural and organisational parameters play an important role to explain gender specific differences in filling volunteer management positions.  相似文献   
8.
A number of recent studies have compared the performance of neural networks (NNs) to a variety of statistical techniques for the classification problem in discriminant analysis. The empirical results of these comparative studies indicate that while NNs often outperform the more traditional statistical approaches to classification, this is not always the case. Thus, decision makers interested in solving classification problems are left in a quandary as to what tool to use on a particular data set. We present a new approach to solving classification problems by combining the predictions of a well-known statistical tool with those of an NN to create composite predictions that are more accurate than either of the individual techniques used in isolation.  相似文献   
9.
Parents of disabled children face many challenges. Understanding their experiences and acknowledging contextual influences is vital in developing intervention strategies that fit their daily realities. However, studies of parents from a resource-poor context are particularly scarce. This ethnographic study with 30 mothers from a South African township (15 semi-structured interviews and 24 participatory group sessions) unearths how mothers care on their own, in an isolated manner. The complexity of low living standards, being poorly supported by care structures and networks, believing in being the best carer, distrusting others due to a violent context, and resigning towards life shape and are shaped by this solitary care responsibility. For disability inclusive development to be successful, programmes should support mothers by sharing the care responsibility taking into account the isolated nature of mothers’ lives and the impact of poverty. This can provide room for these mothers to increase the well-being of themselves and their children.  相似文献   
10.
Trees provide important ecological services in cities, yet the vulnerability of the urban forest to massive tree losses from pest outbreaks could threaten those services, with unknown environmental consequences. The outbreak of emerald ash borer is an imminent threat to the ash population in North America. In the Minneapolis?CSaint Paul, Minnesota, metropolitan area, ash trees are present in 50?% of residential landscapes in Ramsey and Anoka Counties. We used a large survey of household activities, a tree inventory, a Household Flux Calculator accounting tool, and a set of annual evapotranspiration measurements, to quantify the current carbon, nitrogen, and phosphorus storage in ash trees, the cycling of these elements, and the total evapotranspiration from ash trees in residential areas in the metropolitan region. Ash represented 6?% of the trees in residential areas and the removal of the entire ash population would correspondingly reduce net primary production and carbon sequestration by only a few percent and would have negligible effects on losses of nitrogen and phosphorus from residential landscapes. Similarly, the effects of ash loss on the hydrologic cycle would be minimal and would depend largely on management choices for the ground currently underneath ash tree canopies. Overall, the percentage change in biogeochemical and hydrological fluxes corresponded closely with the percent of the total urban tree population that was represented by ash, suggesting that areas with higher densities of ash would experience correspondingly larger effects. A hypothetical tree replacement scenario with similar broadleaf species was determined to be likely to re-establish the original biogeochemical and hydrological conditions once the replacement trees reach maturity.  相似文献   
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