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Return mobility and scientific productivity of researchers working abroad: The role of home country linkages 总被引：1，自引：0，他引：1
Through an analysis of 497 foreign researchers in Italy and Portugal we verify the impact of home linkages on return mobility choices and scientific productivity. We consider the presence of several different types of linkages of the researchers working abroad with their country of origin and control for the most relevant contextual factors (age, research area, position in the host country, etc.). The probability of return to their home country and scientific productivity in the host country are both higher for researchers that maintain home linkages. We conclude that the presence of home linkages directly benefits both countries in addition to the indirect benefit of expanding the scientific networks. Policy implications and suggestions for further research are discussed. 相似文献
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Does technology require labour mobility to diffuse? To explore this, we use German social-security data and ask how plants that pioneer an industry in a location – and for which the local labour market offers no experienced workers – assemble their workforces. These pioneers use different recruiting strategies than plants elsewhere: they hire more workers from outside their industry and from outside their region, especially when workers come from closely related industries or are highly skilled. The importance of access to experienced workers is highlighted in the diffusion of industries from western Germany to the post-reunification economy of eastern German. While manufacturing employment declined in most advanced economies, eastern German regions managed to reindustrialise. The pioneers involved in this process relied heavily on expertise from western Germany: while establishing new manufacturing industries in the East, they sourced half of their experienced workers from the West. 相似文献
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The pervasiveness of mobile devices in families’ homes has dramatically changed the physical and temporal arrangement of co-viewing media content; the representative image of American families seated around a TV set is an anachronism. But understanding and describing contemporary co-participation arrangements around digital media is challenging because of the mobile nature of these activities. As researchers, our greatest challenge is to observe people's digital media use that is increasingly ‘on-the-move’ in an effort to understand the significance and possibilities these devices have in family life, learning, and engagement in and across different settings. This article describes an innovative study design for understanding how mobile technologies influence the ways in which families learn together. We analyze the movement of digital media practices, where they are located, and how digital co-participation within families is distributed across time and space. 相似文献
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The combined characterizations of mobility and phonon scattering spectra allow us to probe hole transport process in epitaxial PbSe crystalline films grown by molecular beam epitaxy （MBE）. The measurements of Hall effect show p-type conductivity of PbSe epitaxial films. At 295 K, the PbSe samples display hole concentrations of （5-8）× 10^17 cm^-3 with mobilities of about 300 cm^2/（V·s）, and at 77 K the hole mobility is as high as 3×10^3 cm^2/（V·s）. Five scattering mechanisms limiting hole mobilities are theoretically analyzed. The calculations and Raman scattering measurements show that, in the temperatures between 200 and 295 K, the scattering of polar optical phonon modes dominates the impact on the observed hole mobility in the epitaxial PbSe films. Raman spectra characterization observed strong optical phonon scatterings at high temperature in the PbSe epitaxial films, which is consistent with the result of the measured hole mobility. 相似文献
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REN Wei YEUNG D.Y. JIN Hai 《浙江大学学报(A卷英文版)》2006,7(10):1683-1689
INTRODUCTION Widely varying mobility characteristics are ex- pected to have significant impact on the performance of routing protocols. Many previous works focused on the routing protocols and seldom discussed the impact of mobility on the transport layer protocol. On the other hand, the performance of the transport layer protocol over different routing protocols was evalu- ated in some previous works (Ahuja et al., 2000; Dyer and Boppana, 2001), but they always used the Ran- dom Waypoin… 相似文献
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Poverty persists across generations through the transmission of informal employment from one generation to the next. Education and earnings are considered important factors that transmit informal employment across generations. Considering education as one of the transmission mechanisms of sectoral employment and poverty, no studies have yet conducted any comparative analysis of educational persistence across generations of formally and informally employed parents. Therefore, the present study estimates the intergenerational persistence of education by considering the nature of parents’ employment through intergenerational elasticity and intergenerational correlation approaches of mobility measurement. Results show that intergenerational persistence is higher at the lower levels of education when the father is informally employed. On the contrary, when the father is formally employed, this persistence is higher at the higher levels of education. This result implies that labour market reforms are essential along with educational reforms to break this intergenerational persistence. 相似文献
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对我国16所高校的实证研究结果显示,近30年来我国城乡子女在高等教育入学机会数量方面的差异一直在缩小,到2010年时差异已基本消失。就入学机会的质量而言,重点高校中城乡子女间的入学机会差异是先扩大后缩小;而普通本科和专科院校中的入学机会差异一直呈现出缩小的态势。今后政府应采取各种措施努力提高农村基础教育的质量,增加农村子女入读重点高中的机会,同时提升普通本科和专科院校尤其是高等职业院校的办学质量。唯有如此,才可以提高城乡子女在高等教育入学机会质量方面的均等化程度。 相似文献
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Kyra Pearson 《传播与批判/文化研究》2013,10(3):256-275
Lesbian prostitute Aileen Wuornos was popularly termed “America's first female serial killer.” Between 1989 and 1990, she killed six men, later testifying they had raped or attempted to rape her. By analyzing media coverage of Wuornos’ story, I argue that Wuornos’ incommensurability with available stories of women who kill illustrates the need to expand the rhetorical resources that make female violence and victimage intelligible. After demonstrating that Wuornos’ gender transgressions were disciplined into intelligible terms by understandings of criminality as an already spatial and gendered category, I conclude by discussing the “trouble” Wuornos poses to feminist and queer cultural politics. 相似文献
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John Aubrey Douglass 《European Journal of Education》2012,47(2):242-259
What accounts for the rapid growth in the For-Profit (FP) higher education sector in the US? How will its growth influence educational opportunity and degree attainment rates in a country that first pioneered a mass higher education built largely on expanding public colleges and universities? The current US experience is a version of what I call the ‘Brazilian Effect’: when public higher education cannot keep pace with growing public demand for access and programmes, governments often allow FP's to rush in and help fill the gap, becoming a much larger and sometimes dominant provider. This is the pattern in many developing economies such as Brazil, Korea, Poland and other parts of the world. Despite new federal regulations intended to better regulate For-Profits, my prediction is that they will continue to grow over the long-term in the US not so much because they meet societal demands for diverse forms of higher education, but because of the inability of the public sector to return to the levels of public subsidies they had in the past. The result now, and in the future, is a kind of policy default: the future tertiary market will not be the result of a well thought out policy at the national or state levels, but a quasi-free market consequence that will foster lower quality providers and fail to meet national goals for increasing the educational attainment level of Americans. This article discusses how higher education policymaking is about broad issues of socioeconomic mobility and economic competitiveness, but it is also about money, big business, and political influence. 相似文献