Search results for "Migration"
showing 10 items of 1709 documents
A many-body approach to transport in quantum systems : From the transient regime to the stationary state
2022
We review one of the most versatile theoretical approaches to the study of time-dependent correlated quantum transport in nano-systems: the non-equilibrium Green's function (NEGF) formalism. Within this formalism, one can treat, on the same footing, inter-particle interactions, external drives and/or perturbations, and coupling to baths with a (piece-wise) continuum set of degrees of freedom. After a historical overview on the theory of transport in quantum systems, we present a modern introduction of the NEGF approach to quantum transport. We discuss the inclusion of inter-particle interactions using diagrammatic techniques, and the use of the so-called embedding and inbedding techniques w…
Paracrine effect of membrane vesicles released by mouse mesoangioblast stem cells on non correlated cell types
2016
Introduction Mouse mesoangioblasts are vessel-associated multipotent progenitor stem cells, which are able to differentiate into different mesodermal cell types. In our previous paper we have demonstrated that these cells are able to shed in the extracellular environment membrane vesicles (EV), which contain both structural proteins and biological factors such as FGF2 and the two gelatinases MMP2/9. EV represent an important mediator of cell-to-cell communication and are involved in both autocrine and paracrine signalling. Interestingly, there is a bidirectional signalling exchange between stem cell EV and damaged cells. In particular, EV from injured cells can reprogram stem cells to acqui…
Ferrocenyl-Coupled N-Heterocyclic Carbene Complexes of Gold(I)
2016
Four gold(I) carbene complexes featuring 4-ferro-cenyl-substituted imidazol-2-ylidene ligands were investigated for antiproliferative and antivascular properties. They were active against a panel of seven cancer cell lines, including multidrug-resistant ones, with low micromolar or nanomolar IC50 (72 h) values, according to their lipophilicity and cellular uptake. The delocalized lipophilic cationic complexes 8 and 10 acted by increasing the reactive oxygen species in two ways: through a genuine ferrocene effect and by inhibiting the thioredoxin reductase. Both complexes gave rise to a reorganization of the F-actin cytoskeleton in endothelial and melanoma cells, associated with a G1 phase c…
Narodowcy w Stanach Zjednoczonych Ameryki Północnej
2012
Autorka opisuje losy członków Stronnictwa Narodowego, którzy znaleźli się na emigracji w Stanach Zjednoczonych po drugiej wojnie światowej. Przedstawia ich poglądy na sprawy krajowe oraz międzynarodowe. Omawia działalność poszczególnych struktur, a także prezentuje najważniejszych działaczy partii w tym okresie.
Immigrant Student Achievement and Education Policy in Finland
2018
Finnish society has faced many changes during the past decade. One major change has been the increasing number of students speaking languages other than the national ones. This chapter provides an overview of the immigrant student population in Finland, including its change during the last decades. This chapter also takes a closer look at results of national and international assessments of students with an immigrant background, particularly the PISA 2012 results in which this student group was oversampled in Finland. This oversampling made the data considerably more representative of students having an immigrant background than in any other rounds, and also allowed more reliable statistica…
Imaginary Numbers of Climate Change Migrants?
2019
Within the extensive scientific and policy discussions about climate change migrants, detailed analyses continue to highlight the lack of evidence thus far for climate change directly causing migration. To understand better how climate change might or might not lead to migration, this paper explores possibilities for developing a robust, repeatable, and verifiable method to count or calculate the number of people migrating or not migrating due to climate change. The discussion starts by examining definitions of &ldquo
Heterogeneous Displacement Effects of Migrant Labor Supply – Quasi-Experimental Evidence From Germany
2019
We provide estimates of the effect of migrant labor supply on resident employment. We exploit variation in the number of asylum seekers eligible to the suspension of a major hiring restriction implemented in a subset of German counties. Our difference-in-difference design allows us to provide evidence from a labor supply shock of migrants on local markets net of their additional spending at arrival that might mask labor market displacement effects. Despite this, we do not find a negative effect on employment growth of natives but only on other foreign residents. This also holds for unskilled employees. Therefore, our findings can be interpreted as the consequence of differential substitutab…
Introduction : spaces of upset in the Nordic region
2022
Abstract This introductory article opens the thematic issue Spaces of Upset in the Nordic Region. It introduces the contributions of the issue, outlines the concepts that unite them, and discusses the sociolinguistic area in which they are set: the Nordic region. Centering on Denmark, Finland and Sweden, the article offers an overview of some of the sociolinguistic, ideological and political characteristics of the region and the countries it comprises. The Nordic region is widely seen as a paradigm case of social stability, consensus and cohesion. This vision is, however, a mirage. To be sure, upset often lingers below the discursive veneer of Nordic harmony, concord and agreement. Breaking…
The role of extrinsic and intrinsic factors on departure decisions of a long-distance migratory passerine
2013
[EN] Factors determining departure decisions of migrants from a stopover site can be extrinsic and/or intrinsic but the relative role of each of these factors on departure decisions is still poorly known. Date and wind should be the main factors determining departure decisions in a long-distance migrant, which is expected to minimise duration of migration. Date was considered as an intrinsic factor and wind as an extrinsic one. We analysed the capture-recapture data of a long-distance migrant European songbird, the sedge warbler Acrocephalus schoenobaenus,from a stopover site in northern Iberia during the autumn migration period to quantify the relative importance of several factors on emig…
Cuando la violencia genera identidad. La guerra en Sri Lanka y la diáspora tamil en Sicilia
2011
Sri Lanka, durante las dos últimas décadas, fue el escenario de una prolongada guerra civil entre la mayoría cingalesa budista y la minoría tamil hindú, que ha defendido su independencia. La primera parte de este artículo muestra que no fueron las diferencias de origen étnico-cultural las que llevaron a la guerra, sino las razones políticas y económicas. La guerra civil ha llevado a una radicalización y cristalización de las diferencias étnicas a través de la manipulación del pasado y del papel político del budismo. La guerra provocó la diáspora tamil en todo el mundo, incluyendo también Sicilia. En la segunda parte del artículo, se presentan algunos puntos del trabajo de campo realizado co…