14,455 research outputs found
Vulnerable and voiceless on the move. Unaccompanied child migrants in the EU
A significant part of child migration is “often invisible in data and policy”, but available data shows that at least 5.3% of the over one million migrants who have lodged first time asylum application in the EU in 2016 were unaccompanied children in need of international protection and that the numbers are constantly rising. In spite of this alarming trend, unaccompanied asylum seeking children (UASC) still suffer in Europe particularly in Greece and Italy seriously inadequate protection, inappropriate services to meet their needs and interests, as well as slow and poor procedures to process their files and ensure them asylum status, family reunification, or relocation, according to their needs. Such dysfunctionalities often encourage young migrants to escape the system and continue their journey relying on smugglers, with the additional risk of becoming victims of abuse and exploitation. The European Union should overcome the Member States’ increasing lack of solidarity and expand the EU regular migration package, starting from the family reunification procedures
Temperature dependence of the surface plasmon resonance in small electron gas fragments, self consistent field approximation
The temperature dependence of the surface plasmon resonance in small metal
spheres is calculated using an electron gas model within the Random Phase
Approximation. The calculation is mainly devoted to the study of spheres with
diameters up to at least 10 nm, where quantum effects can still be relevant and
simple plasmon pole approximation for the dielectric function is no more
appropriate. We find a possible blue shift of the plasmon resonance position
when the temperature is increased while keeping the size of the sphere fixed.
The blue shift is appreciable only when the temperature is a large fraction of
the Fermi energy. These results provide a guide for pump and probe experiments
with a high time resolution, and tailored to study the excited electron system
before thermalisation with the lattice takes place.Comment: 5 pages, 3 figure
Alignment-free Genomic Analysis via a Big Data Spark Platform
Motivation: Alignment-free distance and similarity functions (AF functions,
for short) are a well established alternative to two and multiple sequence
alignments for many genomic, metagenomic and epigenomic tasks. Due to
data-intensive applications, the computation of AF functions is a Big Data
problem, with the recent Literature indicating that the development of fast and
scalable algorithms computing AF functions is a high-priority task. Somewhat
surprisingly, despite the increasing popularity of Big Data technologies in
Computational Biology, the development of a Big Data platform for those tasks
has not been pursued, possibly due to its complexity. Results: We fill this
important gap by introducing FADE, the first extensible, efficient and scalable
Spark platform for Alignment-free genomic analysis. It supports natively
eighteen of the best performing AF functions coming out of a recent hallmark
benchmarking study. FADE development and potential impact comprises novel
aspects of interest. Namely, (a) a considerable effort of distributed
algorithms, the most tangible result being a much faster execution time of
reference methods like MASH and FSWM; (b) a software design that makes FADE
user-friendly and easily extendable by Spark non-specialists; (c) its ability
to support data- and compute-intensive tasks. About this, we provide a novel
and much needed analysis of how informative and robust AF functions are, in
terms of the statistical significance of their output. Our findings naturally
extend the ones of the highly regarded benchmarking study, since the functions
that can really be used are reduced to a handful of the eighteen included in
FADE
Italia, l’accordo con la Libia non decolla
Per l’Italia, il 2017 si è aperto con la sfida della gestione dei flussi dei migranti. Alla fine di dicembre 2017 una circolare del Ministero dell'Interno ha sollecitato l’impellenza di dare “massimo impulso all’attività di rintraccio dei cittadini dei Paesi terzi in posizione irregolare”.Stando alle anticipazioni diffuse, il corollario operativo del documento dovrebbe implicare la riapertura in ogni regione di Centri di identificazione ed espulsione, Cie, il potenziamento degli accordi con i Paesi d’origine per la riammissione dei migranti respinti e il rafforzamento del controllo delle frontiere esterne
Futuro immigrazione Ue: questione di coraggio
L’ultimo tentativo di un’Europa incagliata tra crisi d’identità e cupio dissolvi di avviare una riflessione comune in vista del vertice di Roma del 25 marzo è targato Jean-Claude Juncker. “Con il sessantesimo anniversario dei trattati di Roma è giunto il momento per un’Europa unita a 27 di definire una visione per il futuro. È l’ora della leadership, dell’unità e della volontà comune” ha chiosato durante la presentazione del Libro Bianco sul Futuro dell’Europa il presidente della Commissione europea, lanciando la palla ai 27 capi di Stato o di governo attesi a Roma il 25 marzo per definire ruolo e prospettive dell’Unione dopo lo shock della Brexit, la grande crisi migratoria e la rimonta dilagante di protezionismi e nazionalismi. In Europa pretendere azioni concrete sull’immigrazione può costare l’isolamento politico. E questo lo sa bene chi ha scritto il Libro Bianco. Un testo che nomina la parola immigrazione solo nove volte, e che dal punto di vista sia politico che programmatico ricorda proprio quanto questa continui a essere l’anello debole della strategia europea che ambirebbe a guidare i 27 fino alla nuova legislatura del 2019. Che la faccenda stia diventando di giorno in giorno più complicata lo dimostrano le esternazioni del commissario all’Immigrazione Dimitris Avramopoulos, a cui è spettato, soltanto un giorno, dopo la diffusione del Libro Bianco, per ribadire che senza solidarietà non può esserci alcuna condivisione di responsabilità e che non spetta agli Stati membri scegliere quali misure intendano mettere in atto per gestire i flussi
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