Recent Submissions 

  1. Berücksichtigung von Ökosystemleistungen in raumrelevanten Entscheidungen. Prüfung und Konzipierung von Planungstools 

    Klein, Noëlle; Suter, Alina; Grêt-Regamey, Adrienne (2025)
    Die natürlichen Lebensräume, und damit die Biodiversität und Ökosystemleistungen stehen unter erheblichem Druck. Gleichzeitig wirken sich beispielsweise räumliche (Bau-)Entscheidungen auf die aktuelle und zukünftige Regulierung von Klima, Luftqualität und Frischwasserquantität und -qualität aus. Deshalb ist es wichtig, dass bei solchen Entscheidungen die Auswirkungen auf Ökosystemleistungen mitgedacht werden. Trotz der Verfügbarkeit ...
    Report
  2. On sharp stable recovery from clipped and folded measurements 

    Abdalla, Pedro; Freeman, Daniel; Ramos, João P.G.; et al. (2025)
    SAM Research Report
    We investigate the stability of vector recovery from random linear measurements which have been either clipped or folded. This is motivated by applications where measurement devices detect inputs outside of their effective range. As examples of our main results, we prove sharp lower bounds on the recovery constant for both the declipping and unfolding problems whenever samples are taken according to a uniform distribution on the sphere. ...
    Report
  3. Stable Skeleton Integral Equations for General-Coefficient Helmholtz Transmission Problems 

    Gräßle, Benedikt; Hiptmair, Ralf; Sauter, Stefan (2025)
    SAM Research Report
    A novel variational formulation of layer potentials and boundary integral op- erators generalizes their classical construction by Green’s functions, which are not explicitly available for Helmholtz problems with variable coefficients. Wavenumber explicit estimates and properties like jump conditions follow directly from their variational definition and enable a non-local (“integral”) formulation of acoustic transmission problems (TP) with ...
    Report
  4. Subwavelength Localisation in Nonreciprocal Disordered Systems 

    Ammari, Habib; Barandun, Silvio; Thalhammer, Clemens; et al. (2025)
    SAM Research Report
    We investigate the competing mechanisms of localisation in one-dimensional disordered block subwavelength resonator systems subject to nonreciprocal damping, induced by an imaginary gauge potential. Using a symmetrisation approach to enable the adaptation of tools from Hermitian systems, we derive the limiting spectral distribution of these systems as the number of blocks goes to infinity and characterise their spectral properties in terms ...
    Report
  5. Prognose der Kostenentwicklung in der obligatorischen Krankenpflegeversicherung (OKP) 

    Anderes, Marc; Sturm, Jan-Egbert (2025)
    KOF Studies
    Die KOF Konjunkturforschungsstelle der ETH Zürich berechnet für das BAG jährlich eine Prognose für die Kostenentwicklung im Bereich der obligatorischen Krankenpflegeversicherung (OKP). Das BAG verwendet die Studie im Prämiengenehmigungsverfahren, um die Kostenschätzungen der Versicherer zu beurteilen. Basierend auf der umfassenden Machbarkeitsstudie (Köthenbürger und Sandqvist, 2018) und dem Revisionsbericht (Anderes, 2020) werden die ...
    Report
  6. Before Vegas: The “Red Hackers” Who Shaped China’s Cyber Ecosystem 

    Benincasa, Eugenio (2025)
    CSS Cyberdefense Reports
    Report
  7. IBK Jahresbericht Januar 2023 bis Dezember 2024 

    Institut für Baustatik und Konstruktion (IBK) (2025)
    IBK Jahresbericht
    Report
  8. Participate with Data 

    Lee, Huimin Denise; Vargas, Joshua Rommel; Mangal, Niraly; et al. (2025)
    As urban problems become more complex, collaboration between different fields of expertise is increasingly important to propose effective solutions to these issues today. While data-driven planning can help identify gaps and potentials in urban systems, traditional methods of analysis can overlook or be limited in representing the diverse perspectives of different stakeholders. How can we facilitate community engagement and participation ...
    Report
  9. Berücksichtigung der Wechselwirkung von Bewehrungskorrosion und Tragverhalten zur Beurteilung der Lebensdauer von Stahlbetonbauwerken 

    Yilmaz, Deniz; Angst, Ueli; Reckinger, Nathalie; et al. (2025)
    Actuellement, aucun modèle ne permet de décrire de manière adéquate la dégradation temporelle de l'état des structures en béton armé corrodant en cas d'exposition aux chlorures, par rapport à un état limite, comme par exemple certaines ouvertures de fissures, une certaine déformation ou une certaine résistance ultime restante. Cela repose sur la séparation traditionnelle des disciplines « statique/comportement porteur » et « corrosion/c ...
    Report
  10. Universal estimates for the density of states for aperiodic block subwavelength resonator systems 

    Ammari, Habib; Barandun, Silvio; Davies, Bryn; et al. (2025)
    SAM Research Report
    We consider the spectral properties of aperiodic block subwavelength resonator systems in one dimension, with a primary focus on the density of states. We prove that for random block configurations, as the number of blocks goes to infinity, the integrated density of states converges to a non-random, continuous function. We show both analytically and numerically that the density of states exhibits a tripartite decomposition: it vanishes ...
    Report
  11. Complex Band Structure and localisation transition for tridiagonal non-Hermitian k-Toeplitz operators with defects 

    De Bruijn, Yannick; Hiltunen, Erik Orvehed (2025)
    SAM Research Report
    Using the Bloch-Floquet theory, we propose an innovative technique to obtain the eigenvectors of tridiagonal k-Toeplitz operators. This method offers a more extensive and quantitative basis for describing localised eigenvectors beyond the non-trivial winding zone, yielding sharp decay bounds. The validity of our results is confirmed numerically in one-dimensional resonator chains, showcasing non-Hermitian skin localisation, bulk localisation, ...
    Report
  12. On the optimal Sobolev threshold for evolution equations with rough nonlinearities 

    Pineau, Ben; Taylor, Mitchell A. (2025)
    SAM Research Report
    In this article we are concerned with evolution equations of the form \begin{equation*} \partial_tu-A(D)u=F(u,\overline{u},\nabla u, \nabla \overline{u}) \end{equation*} where \(A(D)\) is a Fourier multiplier of either dispersive or parabolic type and the nonlinear term \(F\) is of limited regularity. Our objective is to develop a robust set of principles which can be used in many cases to predict the highest Sobolev exponent \(s=s(q,d)\) ...
    Report
  13. FEM for singularly perturbed stationary drift-diffusion equations with boundary layers 

    Hiptmair, Ralf; Yu, Tianwei (2025)
    SAM Research Report
    This work investigates a finite element method (FEM) based on the weak imposition of Dirichlet boundary conditions using Nitsche’s method for solving singularly perturbed stationary drift-diffusion equations in the quasineutral limit. A priori error analysis is conducted in the underresolved regime, where the mesh is too coarse to effectively resolve boundary layers effectively, showing optimal convergence rates for the proposed method. ...
    Report
  14. Mapping the Education Landscape: Results of a study on education providers’ training in the hospitality sector in Uzbekistan 

    Renold, Ursula; Palayil, Michelle Augustine; Caves, Katherine Marie (2025)
    CES Studies
    Uzbekistan’s tourism and hospitality sectors are growing rapidly, with over 6.5 million international tourists arriving between January and October 2024—an increase of 17.2% compared to the previous year. As the country positions itself as a key player in regional tourism, this growth places new demands on the education system to supply a skilled and adaptable workforce. Building on the prior "Willingness to Train" (WTT) study focused on ...
    Report
  15. Navigating Self-determination Conflicts: Options for Mediation Support Actors 

    Holt, Sally; Vimalarajah, Luxshi; Carr, Alastair; et al. (2025)
    MSN Discussion Points
    This paper highlights the importance of self-determination (SD) as a challenging issue that drives many of the world’s conflicts, while remaining unacknowledged or misunderstood by conflict parties and those seeking to help them reach mutually acceptable solutions and build sustainable peace. SD can provide a useful lens for understanding and addressing these unrecognized or under-appreciated dynamics by acknowledging and prioritizing the ...
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  16. Bautätigkeit und Verdrängung in der städtischen Schweiz 

    Kauer, Fiona; Lutz, Elena; Büttiker, Dominic; et al. (2025)
    Dieser Bericht untersucht die Siedlungsentwicklung nach innen sowie die Veränderung der lokalen Bevölkerungszusammensetzung durch Ersatzneubauten und Totalsanierungen in den fünf grössten Agglomerationen der Schweiz (Basel, Bern, Genf, Lausanne und Zürich) von 2000 bis 2023 mittels deskriptiver Datenanalysen. Die Siedlungsentwicklung nach innen ist eines der zentralen Paradigmen der aktuellen Schweizer Raumplanung und durch das Gebot der ...
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  17. Die vornehmste Staatsaufgabe 

    Lendi, Martin (2025)
    Report
  18. Streamlining MDB environmental, social and procurement safeguards while maintaining high standards 

    Humphrey, Christopher; Getzel, Bianca (2024)
    ODI Report
    Multilateral development banks (MDBs) utilise environmental and social safeguard frameworks (ESFs) and procurement policies to ensure high operation quality and reduce unintended negative impacts. While the goals of ESF and procurement policies are widely supported, their application can increase costs, implementation times and bureaucratic requirements. The use of MDB policies instead of borrower country policies and systems also raises ...
    Report
  19. Prognose 2025 / 2026 Im Bann der US-Zölle: Handelskonflikte prägen die globale Konjunktur 

    Abberger, Klaus; Bibaj, Arbërim; Daniele, Maurizio; et al. (2025)
    KOF Konjunkturbericht
    Report

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