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A Comprehensive Stochastic Programming Model for Transfer Synchronization in Transit Networks
(2024)arXivWe investigate the stochastic transfer synchronization problem, which seeks to synchronize the timetables of different routes in a transit network to reduce transfer waiting times, delay times, and unnecessary in-vehicle times. We present a sophisticated two-stage stochastic mixed-integer programming model that takes into account variability in passenger walking times between bus stops, bus running times, dwell times, and demand uncertainty. ...Working Paper -
Emigration Prospects, Gender-based Preferences, and the Choice of Major
(2025)CES Working Paper SeriesWe explore how emigration prospects influence students’ choice of university majors in a high-emigration setting. Using a discrete choice experiment in Bosnia and Herzegovina, we find that students prioritize salary prospects when choosing their major. Moreover, students—including those who do not intend to migrate—place significant weight on emigration prospects when choosing a major. This finding reveals how students factor emigration ...Working Paper -
Leveraging Influencers to Reach and Engage Vulnerable Individuals: A Quasi-Experimental Field Study with a Digital Health Intervention (Preprint)
(2025)JMIR PreprintsBackground: Non-communicable diseases (NCDs) are the leading cause of death, present economic challenges to healthcare systems worldwide, and disproportionally affect vulnerable individuals of low socioeconomic status (SES). While digital health interventions (DHIs) offer scalable and cost-effective solutions to promote health literacy and encourage behavior change, key challenges concern how to effectively (a) REACH and (b) ENGAGE ...Working Paper -
Ultrafast selective mid-infrared sublattice manipulation in the ferrimagnet FeCr₂S₄
(2025)FeCr2S4 is a ferrimagnet with two oppositely ordered spin sublattices (Fe and Cr), connected via superexchange interaction, giving a non-zero net magnetic moment. We show, using time-resolved measurements of the magneto-optic Kerr effect, how the magnetic dynamics of the sublattices can be selectively manipulated by resonantly perturbing the Fe sublattice with ultrashort laser pulses. The mid-infrared excitation through intra-atomic Fe ...Working Paper -
SoK: Hardware-supported Trusted Execution Environments
(2022)arXivThe growing complexity of modern computing platforms and the need for strong isolation protections among their software components has led to the increased adoption of Trusted Execution Environments (TEEs). While several commercial and academic TEE architectures have emerged in recent times, they remain hard to compare and contrast. More generally, existing TEEs have not been subject to a holistic systematization to understand the available ...Working Paper -
Long-term usage of the gamified breathing training Breeze and its effect on momentary relaxation in people with cancer: A cohort study
(2024)JMIR PreprintsBackground: People with cancer often experience stress. Digital health interventions (DHIs) can help individuals increase momentary relaxation. Breeze is a gamified breathing training that can be embedded into DHIs. Its effectiveness in controlled cross-sectional studies was shown. However, adherence to Breeze and its effect on momentary relaxation in longitudinal interventional studies has yet to be investigated. Objective: This work ...Working Paper -
Subwavelength Localisation in Disordered Systems
(2025)SAM Research ReportWe consider disordered finite systems of subwavelength resonators where the disorder is in the spatial arrangement of the resonators and their material parameters are perturbed randomly. We elucidate the mechanism of wave localisation in such systems. To do so, we employ the capacitance matrix formalism, make precise the notions of bandgap and localised eigenmodes, study their stabilities with respect to fluctuations in the system, and ...Report -
Effective Medium Theory for Time-modulated Subwavelength Resonators
(2025)SAM Research ReportThis paper provides a general framework for deriving effective material properties of time-modulated systems of subwavelength resonators. It applies to subwavelength resonator systems with a general form of time-dependent parameters. We show that the resonators can be accurately described by a point-scattering formulation when the width of the resonators is small. In contrast to the static setting, where this point interaction approximation ...Report -
A scalable well-balanced Taylor-Galerkin scheme for a lava flow depth-integrated model with point source vents
(2025)SAM Research ReportWe propose a scalable well-balanced numerical method to efficiently solve a modified set of shallow water equations targeting the dynamics of lava flows. The governing equations are an extension of a depth-integrated model already available in the literature and proposed to model lava flows. Here, we consider the presence of vents that act as point sources in the mass and energy equations. Starting from a scheme developed in the framework ...Report -
Convergence of supercell and superspace methods for computing spectra of quasiperiodic operators
(2025)SAM Research ReportWe study the convergence of two of the most widely used and intuitive approaches for computing the spectra of differential operators with quasiperiodic coefficients: the supercell method and the superspace method. In both cases, Floquet-Bloch theory for periodic operators can be used to compute approximations to the spectrum. We illustrate our results with examples of Schrodinger and Helmholtz operators.Report