Working Papers/Reports
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MOBIS-COVID19/86
(2022)Arbeitsberichte Verkehrs- und RaumplanungOn March 16, 2020, 3700 participants who completed the MOBIS study between September 2019 and January 2020 were invited to reinstall the GPS Logger and Travel Diary App ‘Catch-My-Day’, developed by MotionTag, to record their mobility behaviour during the period of special measures implemented to control the spread of the Corona Virus. The first 4 weeks of mobility data from the original MOBIS Study is taken for each participant as a ...Report -
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Sample Complexity and Overparameterization Bounds for Temporal Difference Learning with Neural Network Approximation
(2021)arXivIn this paper, we study the dynamics of temporal difference learning with neural network-based value function approximation over a general state space, namely, \emph{Neural TD learning}. We consider two practically used algorithms, projection-free and max-norm regularized Neural TD learning, and establish the first convergence bounds for these algorithms. An interesting observation from our results is that max-norm regularization can ...Working Paper -
Linear Convergence of Entropy-Regularized Natural Policy Gradient with Linear Function Approximation
(2022)arXivNatural policy gradient (NPG) methods with entropy regularization achieve impressive empirical success in reinforcement learning problems with large state-action spaces. However, their convergence properties and the impact of entropy regularization remain elusive in the function approximation regime. In this paper, we establish finite-time convergence analyses of entropy-regularized NPG with linear function approximation under softmax ...Working Paper -
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Technologische Weiterentwicklung des Bahnsystems 2050
(2022)Die Bahn ist ein Verkehrssystem, welches unter anderem die Eigenschaften hat, sehr energieeffizient und sehr raumeffizient, sehr hohe Transportleistungen zu erbringen. Durch die zukünftigen gesellschaftlichen Herausforderungen, wie der Klimawandel, die Nachhaltigkeitsziele, die zunehmende Ressourcenknappheit, die Wirtschaftlichkeit und der immer knapper werdende Raum in der Schweiz, werden diese Eigenschaften des Bahnsystems immer wichtiger. ...Report -
European Aerosol Phenomenology − 8: Harmonised Source Apportionment of Organic Aerosol using 22 Year-long ACSM/AMS Datasets
(2022)arXivOrganic aerosol (OA) is a key component to total submicron particulate matter (PM1), and comprehensive knowledge of OA sources across Europe is crucial to mitigate PM1 levels. Europe has a well-established air quality research infrastructure from which yearlong datasets using 21 aerosol chemical speciation monitors (ACSMs) and 1 aerosol mass spectrometer (AMS) were gathered during 2013-2019. It includes 9 non-urban and 13 urban sites. ...Working Paper -
Interactive comment on “Commentary on ”Homogeneous nucleation of NAD and NAT in liquid stratospheric aerosols: insufficient to explain denitrification" by Knopf et al.” by A. Tabazadeh
(2003)Atmospheric Chemistry and Physics DiscussionsWorking Paper -
Interactive comment on “Commentary on ”Homogeneous nucleation of NAD and NAT in liquid stratospheric aerosols: insufficient to explain denitrification" by Knopf et al.” by A. Tabazadeh
(2003)Atmospheric Chemistry and Physics DiscussionsWorking Paper -
Werden 2035 vollautomatisierte Autos auf Schweizer Strassen fahren?
(2022)Schweiz 2035 – Think Tanks beantworten 20 ZukunftsfragenReport -
Carbon storage project
(2022)The transformation of our society and living standards to meet a zero-carbon society by 2050 is an urgent task that requires targeted investments a prioritization plans able to stop disturbing the climate with human activities. The energy related carbon to operate the buildings as well as the carbon embedded in construction materials are one of the main responsible to climatic disaster we are living nowadays. To preserve the residual ...Report -
How to Assess Trustworthy AI in Practice
(2022)arXivThis report is a methodological reflection on Z-Inspection. Z-Inspection is a holistic process used to evaluate the trustworthiness of AI-based technologies at different stages of the AI lifecycle. It focuses, in particular, on the identification and discussion of ethical issues and tensions through the elaboration of socio-technical scenarios. It uses the general European Union's High-Level Expert Group's (EU HLEG) guidelines for trustworthy ...Working Paper -
Hotspots of mining-related biodiversity loss in global supply chains and the potential for reduction by renewable electricity
(2022)The expected growth in infrastructure and energy transition may exacerbate biodiversity loss by the rising demand for mining products. Many mining products are extracted in the Global South and exported to the global North for further processing and final consumption, where a link to the devastating environmental effects is often missing. Based on an enhanced multi-regional input-output database, this study assesses global biodiversity ...Working Paper -
ESI Achievements Report
(2022)On the ESI platform (ESI stands for «Energy System Integration»), PSI, in collaboration with partners from industry and research, develops and demonstrates processes that enable a CO2-neutral energy system. The focus is on energy conversion processes that make additional biomass usable for the energy system, or render electricity from fluctuating renewable energy sources storable and accessible for other markets such as mobility on land, ...Report -
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OptFlow
(2022)Im Zuge des Projektes «Opt-Flow» in Zusammenarbeit mit der Dienstabteilung Verkehr (DAV) der Stadt Zürich, wurde eine Beurteilung der Genauigkeit von Verkehrsfluss- und Reisezeitmessung durch verschiedene Sensorik vorgenommen. Von besonderer Interesse sind dabei neu installierte Thermalkameras mit eingebauter WiFi-Schnittstelle. Es werden Verkehrsflüsse und Reisezeiten in einem Testperimeter (in Folge auch Untersuchungsgebiet genannt) in ...Report -
Adoption and Diffusion of Digital Technologies
(2022)KOF Working PapersThe study provides evidence with respect to some topics of inter- and intra-firm diffusion of digital technology so far neglected in research. The analysis is based on a slightly extended version of the encompassing model of Battisti et al. (2009). We use a unique dataset that provides for the entire business sector information on the diffusion of 24 digital technologies ranging from old ones up to others developed only in recent years. ...Working Paper -
Force Computation for Dielectrics using Shape Calculus
(2022)SAM Research ReportWe are concerned with the numerical computation of electrostatic forces/torques in only piecewise homogeneous materials using the boundary element method (BEM). Conventional force formulas based on the Maxwell stress tensor yield functionals that fail to be continuous on natural trace spaces. Thus their use in conjunction with BEM incurs slow convergence and low accuracy. We employ the remedy discovered in {\sc P.~Panchal and R.~Hiptmair}, ...Report