464 research outputs found
Human Fraternity & Inclusive Citizenship
Polarization and discrimination linked to religion have been increasing in many parts of the world, including on the two shores of the Mediterranean. Against this background, however, seeds of hope have emerged from a number of religious leaders who have called for a new narrative of human fraternity and inclusive citizenship.
This report analyzes the opportunities which human fraternity and inclusive citizenship offer for government-religious partnerships aimed at building more inclusive and peaceful societies across both shores of the Mediterranean and puts forward interreligious engagement as a new policy framework that recognizes and amplifies these novel dynamics.
Can the interreligious narrative of human fraternity help to create new inclusive forms of citizenship? How can governments and international organizations better partner with religious leaders and communities to concretely build inclusive societies from the MENA region to Europe?Publishe
Cascade of magnetic field induced Lifshitz transitions in the ferromagnetic Kondo lattice material YbNi4P2
A ferromagnetic quantum critical point is thought not to exist in two and
three-dimensional metallic systems yet is realized in the Kondo lattice
compound YbNi4(P,As)2, possibly due to its one-dimensionality. It is crucial to
investigate the dimensionality of the Fermi surface of YbNi4P2 experimentally
but common probes such as ARPES and quantum oscillation measurements are
lacking. Here, we studied the magnetic field dependence of transport and
thermodynamic properties of YbNi4P2. The Kondo effect is continuously
suppressed and additionally we identify nine Lifshitz transitions between 0.4
and 18 T. We analyze the transport coefficients in detail and identify the type
of Lifshitz transitions as neck or void type to gain information on the Fermi
surface of YbNi4P2. The large number of Lifshitz transitions observed within
this small energy window is unprecedented and results from the particular flat
renormalized band structure with strong 4f-electron character shaped by the
Kondo lattice effect.Comment: 6 pages, 4 figure
Magnetostriction and magnetic texture to 97.4 Tesla in frustrated SrCu2(BO3)2
Strong geometrical frustration in magnets leads to exotic states, such as
spin liquids, spin supersolids and complex magnetic textures. SrCu2(BO3)2, a
spin-1/2 Heisenberg antiferromagnet in the archetypical Shastry-Sutherland
lattice, exhibits a rich spectrum of magnetization plateaus and stripe-like
magnetic textures in applied fields. The structure of these plateaus is still
highly controversial due to the intrinsic complexity associated with
frustration and competing length scales. We reveal new magnetic textures in
SrCu2(BO3)2 via magnetostriction and magnetocaloric measurements in fields up
to 97.4 Tesla. In addition to observing the low-field fine structure of the
plateaus with unprecedented resolution, the data also reveal lattice responses
at 82 T and at 73.6 T which we attribute, using a controlled density matrix
renormalization group approach, to the long-predicted 1/2-saturation plateau,
and to a new 2/5 plateau.Comment: 12 pages, 4 figures, submitte
Nernst and Seebeck Coefficients of the Cuprate SuperconductorYBaCuO: A Study of Fermi Surface Reconstruction
The Seebeck and Nernst coefficients and of the cuprate
superconductor YBaCuO (YBCO) were measured in a single crystal with
doping in magnetic fields up to H = 28 T. Down to T=9 K,
becomes independent of field by T, showing that superconducting
fluctuations have become negligible. In this field-induced normal state,
and are both large and negative in the limit, with the
magnitude and sign of consistent with the small electron-like Fermi
surface pocket detected previously by quantum oscillations and the Hall effect.
The change of sign in at K is remarkably similar to that
observed in LaBaCuO, LaNdSrCuO and
LaEuSrCuO, where it is clearly associated with the onset
of stripe order. We propose that a similar density-wave mechanism causes the
Fermi surface reconstruction in YBCO.Comment: Final version accepted for publication in Phys. Rev. Lett. New title,
shorter abstract, minor revision of text and added reference
Boron-containing delocalised lipophilic cations for the selective targeting of cancer cells
Correction for “Boron-containing delocalised lipophilic cations for the selective targeting of cancer cells” by Gianpiero Calabrese et al., Med. Chem. Commun., 2017, 8, 67–72.</p
Enhancement of the Nernst effect by stripe order in a high-Tc superconductor
The Nernst effect in metals is highly sensitive to two kinds of phase
transition: superconductivity and density-wave order. The large positive Nernst
signal observed in hole-doped high-Tc superconductors above their transition
temperature Tc has so far been attributed to fluctuating superconductivity.
Here we show that in some of these materials the large Nernst signal is in fact
caused by stripe order, a form of spin / charge modulation which causes a
reconstruction of the Fermi surface. In LSCO doped with Nd or Eu, the onset of
stripe order causes the Nernst signal to go from small and negative to large
and positive, as revealed either by lowering the hole concentration across the
quantum critical point in Nd-LSCO, or lowering the temperature across the
ordering temperature in Eu-LSCO. In the latter case, two separate peaks are
resolved, respectively associated with the onset of stripe order at high
temperature and superconductivity near Tc. This sensitivity to Fermi-surface
reconstruction makes the Nernst effect a promising probe of broken symmetry in
high-Tc superconductors
Understanding the needs of Mena public transport customers: culture of service and gender responsive recommendations
Fast population growth, urban sprawl and the raise in households’ motorization observed in all major cities of the Middle-East and North-Africa (MENA) region, are constantly challenging public transport providers who seek to handle efficiently the continuously rising travel demand. Most of the MENA cities suffer from traffic congestion that not only impacts the quality of life of MENA citizens, but also their access to job opportunities, health services, and social and political participation. Alongside the development of public transport network, it is crucial to encourage urban dwellers to reduce their dependence on personal cars, use public transport, and develop soft mobility skills. Therefore,
operators and service providers need to define customer-centric strategy and build a culture of service excellence in line with their customers’expectations. In cooperation with academic partners, the UITP MENA Centre for Transport Excellence launched the User-Oriented Public Transport research project with the aim to understand the perceptions of female and male users and non-users about public transport services in five MENA cities: Algiers, Amman, Beirut, Casablanca and Muscat. The methodological framework was built around the five dimensions of the user’s needs pyramid: safety, security, ease-to-use, comfort and experience. Based on the quantitative analysis of data
collected from 984 respondents and the qualitative analysis of 49 women’s testimonies collected during the focus groups, recommendations were made to encourage culture of service and gender mainstreaming in public transport development in the region
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