School segregation in contemporary cities: Socio-spatial dynamics, institutional context and urban outcomes

Social and social-spatial inequality are on the rise in the Global North. This has resulted in increasing segmentation between population groups with different social and ethnic backgrounds, and in differentiated access to cultural and material assets. With these changes, the relation between segregation in the educational sphere and segregation in the residential sphere has become crucial for understanding social reproduction and intergenerational social mobility. However, knowledge about this relation is still limited. We argue that the institutional and spatial contexts are key dimensions to consider if we want to expand this knowledge. The institutional context regards the extent of public funding, the degree to which parental choice and/or geographical proximity drive school selection, the role and status of private schools and the religious and pedagogical pluralism of the educational system. The spatial context refers to the geographies of education: the ethnic and social composition of school populations and their reputations; the underlying levels and trends of residential segregation; and the spatial distribution of schools in urban space. In this introduction to the special issue we will address these interrelated dimensions, with reference to theoretical and empirical contributions from the existing body of literature; and with reference to the contributions in this special issue. School segregation emerges from the studies included in this special issue as a relevant issue, differently framed according to the institutional and spatial contexts. A comparative typology will be proposed to illustrate how school segregation is peculiarly shaped in different national and local contexts

Citizen-led micro-regeneration and the negotiation of new urban public spaces: A comparative case-study of civic crowdfunding in London

Alternative urban spaces across civic, private, and public spheres emerge in response to the great challenges that urban actors are currently confronted with. Labour markets are changing rapidly, the availability of affordable housing is under intensifying pressure, and public spaces have become battlegrounds of urban politics. This edited collection brings together contributors in order to spark an international dialogue about the production of alternative urban spaces through a threefold exploration of alternative spaces of work, dwelling, and public life. Seeking out and examining existing alternative urban spaces, the authors identify the elements which provide opportunity to create radically different futures for the world’s urban spaces. This volume is the culmination of an international search for alternative practices to dominant modes of capitalist urbanization, bringing together interdisciplinary, empirically grounded chapters from hot spots in disparate cities around the world. Offering a multidisciplinary perspective, The Production of Alternative Urban Spaces will be of great interest to academics working across the fields of urban sociology, human geography, anthropology, political science, and urban planning. It will also be indispensable to any postgraduate students engaged in urban and regional studies

Interpreting patterns of interaction between civic activism and government agency in civic crowdfunding campaigns

© 2019 Ingenta. Addressing the under-researched interplay between civic activism and government agencies, this paper focuses on the conditions for broad local support for civic crowdfunding projects and the interaction between proponents of such projects, their associated stakeholders, and traditional urban planning frameworks. Building on Carolina Pacchi's work on the relationships between community and state in examples of local activism in European cities, the paper applies four types of relationship between community and state: state regulation and community implementation; cooperation; community autonomy; and community opposition. These are used to unpack the different phases of civic crowdfunding projects and to show how relationships with the state evolve throughout the lifecycle of a project. Drawing upon qualitative research carried out in London and Milan between 2015 and 2017, we examine the case of the Peckham Coal Line in south London, a proposed urban elevated park along a disused coal line. Chosen for its long-term ambitions, its substantial local support and financial backing through mayoral match-funding, the case is used to examine the dynamic interaction between the digitally enabled activism of civic crowdfunding and local government agencies. Our study of the development of the Peckham Coal Line project gives insight into the shifting nature of the relationship between civic actors and the state, showing that while the 'autonomous' development of local projects is an important aspect of civic crowdfunding projects, the state does not disappear. Further, online and offline activities are only one step in the redefinition of contemporary forms of citizenship and the claim that civic crowdfunding can deliver extended citizen participation should be more closely scrutinized

Measurement of the total cross section and ρ-parameter from elastic scattering in pp collisions at sqrt(s)=13 TeV with the ATLAS detector

In a special run of the LHC with β⋆=2.5 km, proton–proton elastic-scattering events were recorded at sqrt(s)=13 TeV with an integrated luminosity of 340 μb^{−1} using the ALFA subdetector of ATLAS in 2016. The elastic cross section was measured differentially in the Mandelstam t variable in the range from −t=2.5⋅10^{−4} GeV^2 to −t=0.46 GeV^2 using 6.9 million elastic-scattering candidates. This paper presents measurements of the total cross section σ_{tot}, parameters of the nuclear slope, and the ρ-parameter defined as the ratio of the real part to the imaginary part of the elastic-scattering amplitude in the limit t→0. These parameters are determined from a fit to the differential elastic cross section using the optical theorem and different parameterizations of the t-dependence. The results for σ_{tot} and ρ are σ_{tot}(pp→X)=104.7±1.1 mb ρ=0.098±0.011. The uncertainty in σ_{tot} is dominated by the luminosity measurement, and in ρ by imperfect knowledge of the detector alignment and by modelling of the nuclear amplitude

Measurement of exclusive pion pair production in proton–proton collisions at √s=7 TeV with the ATLAS detector

The exclusive production of pion pairs in the process pp→ ppπ+π- has been measured at s=7TeV with the ATLAS detector at the LHC, using 80μb-1 of low-luminosity data. The pion pairs were detected in the ATLAS central detector while outgoing protons were measured in the forward ATLAS ALFA detector system. This represents the first use of proton tagging to measure an exclusive hadronic final state at the LHC. A cross-section measurement is performed in two kinematic regions defined by the proton momenta, the pion rapidities and transverse momenta, and the pion–pion invariant mass. Cross-section values of 4.8±1.0(stat)-0.2+0.3(syst)μb and 9±6(stat)-2+2(syst)μb are obtained in the two regions; they are compared with theoretical models and provide a demonstration of the feasibility of measurements of this type

Searches for lepton-flavour-violating decays of the Higgs boson into eτ and μτ in \sqrt{s} = 13 TeV pp collisions with the ATLAS detector

Abstract This paper presents direct searches for lepton flavour violation in Higgs boson decays, H → eτ and H → μτ, performed using data collected with the ATLAS detector at the LHC. The searches are based on a data sample of proton-proton collisions at a centre-of-mass energy s $$\sqrt{s}$$ = 13 TeV, corresponding to an integrated luminosity of 138 fb−1. Leptonic (τ → ℓνℓντ) and hadronic (τ → hadrons ντ) decays of the τ-lepton are considered. Two background estimation techniques are employed: the MC-template method, based on data-corrected simulation samples, and the Symmetry method, based on exploiting the symmetry between electrons and muons in the Standard Model backgrounds. No significant excess of events is observed and the results are interpreted as upper limits on lepton-flavour-violating branching ratios of the Higgs boson. The observed (expected) upper limits set on the branching ratios at 95% confidence level, B $$\mathcal{B}$$ (H → eτ) < 0.20% (0.12%) and B $$\mathcal{B}$$ (H → μτ ) < 0.18% (0.09%), are obtained with the MC-template method from a simultaneous measurement of potential H → eτ and H → μτ signals. The best-fit branching ratio difference, B $$\mathcal{B}$$ (H → μτ) → B $$\mathcal{B}$$ (H → eτ), measured with the Symmetry method in the channel where the τ-lepton decays to leptons, is (0.25 ± 0.10)%, compatible with a value of zero within 2.5σ

Measurement of the total cross section and ρ -parameter from elastic scattering in pp collisions at √s=13 TeV with the ATLAS detector

In a special run of the LHC with β⋆= 2.5 km, proton–proton elastic-scattering events were recorded at s=13 TeV with an integrated luminosity of 340μb-1 using the ALFA subdetector of ATLAS in 2016. The elastic cross section was measured differentially in the Mandelstam t variable in the range from - t= 2.5 · 10 - 4 GeV 2 to - t= 0.46 GeV 2 using 6.9 million elastic-scattering candidates. This paper presents measurements of the total cross section σtot , parameters of the nuclear slope, and the ρ -parameter defined as the ratio of the real part to the imaginary part of the elastic-scattering amplitude in the limit t→ 0 . These parameters are determined from a fit to the differential elastic cross section using the optical theorem and different parameterizations of the t-dependence. The results for σtot and ρ are σtot(pp→X)=104.7±1.1mb,ρ=0.098±0.011. The uncertainty in σtot is dominated by the luminosity measurement, and in ρ by imperfect knowledge of the detector alignment and by modelling of the nuclear amplitude

Studies of new Higgs boson interactions through nonresonant HH production in the b¯bγγ fnal state in pp collisions at √s = 13 TeV with the ATLAS detector

A search for nonresonant Higgs boson pair production in the b ¯bγγ fnal state is performed using 140 fb−1 of proton-proton collisions at a centre-of-mass energy of 13 TeV recorded by the ATLAS detector at the CERN Large Hadron Collider. This analysis supersedes and expands upon the previous nonresonant ATLAS results in this fnal state based on the same data sample. The analysis strategy is optimised to probe anomalous values not only of the Higgs (H) boson self-coupling modifer κλ but also of the quartic HHV V (V = W, Z) coupling modifer κ2V . No signifcant excess above the expected background from Standard Model processes is observed. An observed upper limit µHH &lt; 4.0 is set at 95% confdence level on the Higgs boson pair production cross-section normalised to its Standard Model prediction. The 95% confdence intervals for the coupling modifers are −1.4 &lt; κλ &lt; 6.9 and −0.5 &lt; κ2V &lt; 2.7, assuming all other Higgs boson couplings except the one under study are fxed to the Standard Model predictions. The results are interpreted in the Standard Model efective feld theory and Higgs efective feld theory frameworks in terms of constraints on the couplings of anomalous Higgs boson (self-)interactions