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Glaciers
(2020)Meltwater from Alpine glaciers is a key component of the Swiss hydrological budget: It significantly contributes to total discharge, sustains minimum flow levels during dry periods, and shapes seasonal regimes. Due to climate change, Swiss glaciers are anticipated to lose between 59% and 93% of their 2018 ice volume by 2100. The associated glacier retreat will impact hydrology, ecosystems, sediment transport, water quality, landscapes, ...Report -
Job Situation of ETH Alumni
(2020)KOF StudiesHow do ETH alumni fare in the world of work? How satisfied are they with their job and how much do they earn? Do they think that they perform interesting tasks? How many are in a leadership position? And are there differences between female and male graduates? This report answers these and related questions by summarizing the key findings of an incentivized online survey among ETH alumni that we fielded between November 2019 and ...Report -
Die Schweizer Stellensuchenden im Covid19-Lockdown
(2020)Der Bundesrat hat am 13. März einen partiellen Lockdown der Schweiz beschlossen, der trotz Unterstützungsmassnahmen zu einem starken Anstieg der Arbeitslosigkeit und einem Einbruch bei der Zahl offener Stellen geführt hat. Zwischen dem 21. April und dem 10. Mai haben wir 845 Stellensuchende in der Schweiz zu ihrer persönlichen Situation befragt. Die befragten gaben an, deutlich weniger passende Stelleninserate zu finden als Anfang ...Report -
Proning TACO
(2020)Hospitals treating CovidHospitals Covid1919 patients around the world are using the prone-positioning of patients with Acute Respiratory Distress Syndrome (ARDS) as an effective therapy to increase blood oxygenation and reduce mortality. Turning anaesthetized patients safely requires at least 33--55medical nurses and can be medical tedious to do with current methods. This project proposes a simple mechanical solution to facilitate the ...Report -
The Identity of Oxo-Degradable Plastics and their Use in Switzerland
(2020)Oxo-degradable plastics (ODP) are plastics containing pro-oxidant additives that allegedly promote fragmentation and subsequent biodegradation. However, in practice, ODP do not fully biodegrade under environmental or industrial composting conditions, and thus may serve as a source of microplastics in the environment. In addition, ODP can negatively impact recycling processes. In this study, we investigate the occurrence of ODP in Switzerland ...Report -
Overcoming the curse of dimensionality in the numerical approximation of high-dimensional semilinear elliptic partial differential equations
(2020)SAM Research ReportRecently, so-called full-history recursive multilevel Picard (MLP) approximation schemes have been introduced and shown to overcome the curse of dimensionality in the numerical approximation of semilinear parabolic partial differential equations (PDEs) with Lipschitz nonlinearities. The key contribution of this article is to introduce and analyze a new variant of MLP approximation schemes for certain semilinear elliptic PDEs with Lipschitz ...Report -
Quantitative estimates for stress concentration of the Stokes flow between adjacent circular cylinders
(2020)SAM Research ReportWhen two inclusions with high contrast material properties are located close to each other in a homogeneous medium, stress may become arbitrarily large in the narrow region between them. In this paper, we investigate such stress concentration in the two-dimensional Stokes flow when inclusions are the two-dimensional cross sections of circular cylinders of the same radii and the background velocity field is linear. We construct two ...Report -
Exceptional points in parity-time-symmetric subwavelength metamaterials
(2020)SAM Research ReportWhen sources of energy gain and loss are introduced to a wave scattering system, the underlying mathematical formulation will be non-Hermitian. This paves the way for the existence of exceptional points, whereby eigenmodes are linearly dependent. The main goal of this work is to study the existence and consequences of exceptional points in the setting of high-contrast subwavelength metamaterials. We begin by studying a system of two ...Report -
Die Schweizer Selbständigerwerbenden in der Covid19-Pandemie
(2020)Der Bundesrat hat am 13. März einen partiellen Lockdown der Schweiz beschlossen, der viele Betriebe stark betroffen hat. In der Woche nach Ostern (14.-20. April) haben wir die Inhaberinnen und Inhaber von 1'011 kleinen und mittleren Unternehmen (KMU) zu den Auswirkungen der Krise auf das Unternehmen und ihre persönliche Situation befragt. 409 der befragten Selbständigen führen einen Betrieb, der in dieser Zeit geschlossen war. Es zeigt ...Report