1,721,140 research outputs found
Introduction to the RSC Advances themed collection on nanotubes: fabrication, properties, and applications
No full textThis themed collection presents a selection of articles exploring new findings in the synthesis, characterization and application of nanotubes, with particular focus on carbon nanotubes and hybrid materials. These articles illustrate the current scientific challenges, discoveries and the latest applications, offering a comprehensive overview of the state of the art. Ranging from medicine to energy, from nanoelectronics to advanced sensors, the contributions demonstrate how nanotubes can have a significant impact in several fields
Resilient students with migratory background
No full textNumerous research has shown that there is direct relationship among high educational outcomes, employment, income and integration. Immigrants’ children do show, on average, lower educational performances than natives’ ones in addition of being more socio-economically disadvantaged. Countries’ success in helping and integrating immigrants’ children needs to find new educational policies and strategies. Using PISA survey data, we aim at providing further elements of discussion looking at “resilient” students. Given the strong impact of the students’ social, cultural and economic family background, we aim at analysing how “disadvantaged” students can overcome their socio-economic and cultural obstacles and achieve good educational performances. Applying multilevel logit models, we analyse the main determinants to be resilient students considering both individual motivations and school resources
Migration from the United States to the European Union: trends and characteristics
No full textThis paper analyzes emigration from the United States to the European Union. Few empirical studies have been conducted on this topic and theorization on this type of migration is essentially inexistent. In this paper, we tried to fill this gap and to show how migration between advanced economies is crucial in understanding different and under-researched aspects of international migration. Specifically, the magnitude of migration from the US appears “too large” to be explained through classic migration theories but “too small” when compared to the overall movements originating in other developed countries. As to the main results, the lower migration propensity showed by the US born population compared with that of the population born in other advanced economies seems to be related to its historical evolution: the US has never had mass emigration and US colonialism was historically less relevant, at least compared to Europe. Geographical and cultural proximity assume instead a major relevance in explaining US emigration patterns and magnitude. Focusing on the characteristics of US emigration, we found, that the interplay of various specific forces have created over time a composite profile of this population, which – being characterized by specific and various motivations – looks, generally speaking, heterogeneous. More specifically, the profile of US emigrants in the European Union Member States is, we have found, essentially linked to family formation and to economic integration between EU and US society. We conclude that migration between advanced economies is relevant internationally, but largely ignored at a scientific level. The more interactions between economies are destined to augment, the more an understanding of their consequences for origin and destination countries becomes a priority
Point contact spectroscopy: a powerful technique for the low temperature characterization of superconducting materials
No full textGlassy Carbon Electrode Modified with N-Doped Reduced Graphene Oxide Sheets as an Effective Electrochemical Sensor for Amaranth Detection
No full textAmaranth is one of the synthetic azo colorants used to improve the appearance and to increase the appeal of some foods and soft drinks. The excessive consumption of amaranth can be associated with health side effects, emphasizing the need to monitor this food dye. Accordingly, the present study aimed to introduce an electrochemical sensor of glassy carbon electrode (GCE) modified with N-doped reduced graphene oxide (N-rGO), N-rGO/GCE, to detect the amaranth sensitively and rapidly. Several electrochemical techniques such as differential pulse voltammetry (DPV), linear sweep voltammetry (LSV), chronoamperometry (CHA), and cyclic voltammetry (CV) are exploited for the evaluation of the efficiency of the developed electrode for the detection of amaranth. We found that N-rGO/GCE enhanced amaranth oxidation, thus significantly elevating the current signal. Amaranth showed that calibration curves ranged from 0.1 to 600.0 μM, and the limit of detection (LOD) (S/N = 3) was 0.03 μM. Finally, the developed sensor was effectively applied for real samples (tap water, apple juice, and orange juice) with acceptable recovery values from 96.0 to 104.3%
L???integrazione degli immigrati nei paesi dell???Ue15: riscontri empirici per istruzione e mercato del lavoro
No full textIl capitolo approfondisce, nei paesi dell???Ue-15, l???analisi del percorso di integrazione degli immigrati in tema di istruzione e mercato del lavoro, considerate due delle quattro aree di intervento ???prioritario??? della Dichiarazione di Saragozza adottata nella IV Conferenza Interministeriale europea dai Ministri dell???Ue responsabili per le questioni migratorie (Saragozza, 15-16 Aprile, 2010). Considerando in maniera critica e ampliando il set di indicatori statistici proposti dalla stessa Dichiarazione per il monitoraggio della situazione, gli autori evidenziano come l???integrazione nel settore dell???istruzione sia influenzata significativamente dall???anno di arrivo e dal paese di provenienza, mentre quella nel mercato del lavoro sia caratterizzata da una rilevante differenziazione di genere. Inoltre, il paese di residenza/destinazione ha un forte impatto su entrambi gli ambiti osservati, mostrando come storie migratorie e politiche di ammissione e accoglimento rivestano un???importanza cruciale nell???integrazione degli immigrati
IL RENDIMENTO SCOLASTICO: UN’ANALISI DELL’INDAGINE PISA
No full textIl libro affronta il complesso tema dell’istruzione sotto vari profili: come è organizzata in Italia, come è cambiata nel recente passato e come cambierà in futuro. Si analizzano in particolare gli aspetti problematici relativi alle risorse (come vengono investite e da parte di chi, nel settore pubblico e in quello privato), la valutazione dei risultati, la presenza degli stranieri, il trattamento di aspetti differenziali, la capacità della scuola di favorire la mobilità sociale e la sua utilità come investimento economico per le famiglie e gli individui
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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