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Previous works provided several counterexamples to monotonicity of the lowest eigenvalue for the magnetic Laplacian in the two-dimensional case. However, the three-dimensional case is less studied. We use the results obtained by Helffer, Kachmar, and Raymond to provide one of the first counterexamples in 3D. Considering the magnetic Robin Laplacian on the unit ball with a constant magnetic field,
This column presents the evolution of sentiment analysis from a requirements engineering perspective. With large language models, the technology is now accessible to all. From novices to expert users, we discuss suitable ways to get started.
Differential cross sections (σ(Eγ,θn)) for the He(γ,n) reaction have been measured at Eγ=50–71 MeV and θn=30–120°. These data are compared with theoretical predictions where a microscopic calculation of the He and He wavefunctions has been made within the Alt-Grassberger-Sandhas, integral-equation formalism.
The MAX IV facility in Lund (Sweden) is under construction and conditioning of the electron guns for the injector is ongoing. There are two guns in the injector, one thermionic gun for storage ring injection and one photocathode gun for the Short Pulse Facility. In this paper we report on the beam performance tests of the photocathode gun. The measurements were performed at the MAX IV electron gun
Det kan inte ha undgått någon att USA drabbats av en mental växthuseffekt. Den politiska hettan är besvärande, debattklimatet minner om rötmånad och giftalgerna sipprar ut i omvärlden. Mot den bakgrunden är det intressant att följa den amerikanska högerns långsiktiga utveckling för att få perspektiv på hur det har kunnat gå så illa. Det finns förvisso redan en sån litteratur, även på svenska. Jag
This paper highlights the extent to which a future mobility system dominated by Connected and Autonomous Vehicles (CAVs) poses profound challenges to the ‘publicness’ of the transport and mobility systems of many cities. This is evident at different policy levels: the regulatory posture of governments, changing notions of the contributions of mobility to wider ‘public value’, and the underpinning
This paper explores how urban Destination Management Organisations (DMOs) in Sweden, have understood their communicative role, developed communicative strategies and tactics during the COVID-19 pandemic. The overall aim of this research is to develop understanding of the role of communication strategies for developing urban destination resilience. This study is conducted in collaboration with the
IMPORTANCE: A 50% reduction of glaucoma-related blindness has previously been demonstrated in a population that was screened for open-angle glaucoma. Ongoing screening trials of high-risk populations and forthcoming low-cost screening methods suggest that such screening may become more common in the future. One would then need to estimate a key component of the natural history of chronic disease,
With the trend of transport electrification, the fleet of delivery and transport vehicles with internal combustion engines taking fossil fuel in the terminals of logistics companies should be gradually replaced by electric vehicles (EVs). Expansion planning of the power system in the terminal is needed to meet the increased EV charging need. Different expansion solutions with variable technologies
Background and Hypothesis: To clarify whether the familial liability to psychosis associated with bipolar disorder (BD) is nonspecific or has a greater effect on risk for psychosis in cases with prominent mood symptoms and/or a remitting course. Study Design: We examined, in 984 809 offspring raised in intact families in Sweden, born 1980-1996 and followed-up through 2018, by multivariable Cox pro
We have developed a sampling method for beamline simulations for the proposed NNBAR experiment at the European Spallation Source. The method is based on probability density evaluation and duct source biasing and enables the simulations of the entire NNBAR beamline with high statistics while also preserving correlations of the neutron tracks. Future efforts will focus on employing these methods for
Construction of the MAX IV facility started early this year. The facility will include two storage rings for the production of synchrotron radiation. The 3 GeV ring will house insertion devices for the production of x-rays while the 1.5 GeV ring will serve UV and IR users. Recently, the lattices for the storage rings in the MAX IV facility were updated. In the 3 GeV storage ring the vertical beam
The time dependent Maxwell system is supplemented with the constitutive relations of linear bianisotropc media and is treated as a neutral integro-differential equation in a Hilbert space. By using the theory of abstract Volterra equations and strongly continuous semigroups we obtain general well-posedness results for the corresponding mathematical problem.
This thesis deals with the characterization of the approved inner tracker upgrade of the ALICE experiment involving an innovative and ultra-thin silicon detector with a cylindrical geometry. During this thesis work, Monolithic Active Pixel Sensors (MAPS) were studied for the first large-scale prototype of the upgrade, together with a sensor of the same technology with smaller size. Properties of t
In view of its complex demographic composition and the lingering controversies on recent civil war historiography, Lebanon provides a unique case of education in a post-conflict context. The absence of a common Lebanese national history curriculum puts individual history teachers under significant pressure. In lieu of an engagement with recent national history, avoided because of its controversy,
