34 research outputs found
Immigrant community integration in world cities
As a consequence of the accelerated globalization process, today major cities
all over the world are characterized by an increasing multiculturalism. The
integration of immigrant communities may be affected by social polarization and
spatial segregation. How are these dynamics evolving over time? To what extent
the different policies launched to tackle these problems are working? These are
critical questions traditionally addressed by studies based on surveys and
census data. Such sources are safe to avoid spurious biases, but the data
collection becomes an intensive and rather expensive work. Here, we conduct a
comprehensive study on immigrant integration in 53 world cities by introducing
an innovative approach: an analysis of the spatio-temporal communication
patterns of immigrant and local communities based on language detection in
Twitter and on novel metrics of spatial integration. We quantify the "Power of
Integration" of cities --their capacity to spatially integrate diverse
cultures-- and characterize the relations between different cultures when
acting as hosts or immigrants.Comment: 13 pages, 5 figures + Appendi
Report of 2 Cases of Primary Epithelioid Hemangioendothelioma of the External Iliac Vein
The Influence of the Temperature, External Magnetic Field, and the Thickness of Pt Sublayer on the Magnetocrystalline Anisotropy Constants in Co/Pt Multilayers
In this paper we present the behaviour of the magnetocrystalline anisotropy constants of [CoPt] multilayers as a function of temperature, external magnetic field, and non-magnetic layer thickness, observed by means of a torque magnetometer in an in-plane configuration. We have determined the magnetocrystalline anisotropy constants from the magnetic torque curves for different temperatures and in different magnetic fields, taking into account the angle difference between the directions of the external field and the magnetization. Among the results of this paper there are the determination of the critical thickness of Pt and the need to introduce the third order anisotropy constant in the analysis
Re-Identification Risk versus Data Utility for Aggregated Mobility Research Using Mobile Phone Location Data
Big Data Processing, Analysis and Applications in Mobile Cellular Networks
When coupled with spatio-temporal context, location-based
data collected in mobile cellular networks provide insights into patterns of human activity, interactions, and mobility. Whilst uncovered patterns have immense potential for improving services of telecom providers as
well as for external applications related to social wellbeing, its inherent massive volume make such âBig Dataâ sets complex to process. A significant number of studies involving such mobile phone data have been
presented, but there still remain numerous open challenges to reach technology readiness. They include efficient access in privacy-preserving manner,
high performance computing environments, scalable data analytics, innovative data fusion with other sourcesâall finally linked into the applications ready for operational mode. In this chapter, we provide a broad
overview of the entire workflow from raw data access to the final applications and point out the critical challenges in each step that need to be addressed to unlock the value of data generated by mobile cellular
networks