Filetype
Climate change can raise average temperatures and humidity and induce more frequent and stronger extreme weather events. This intensifies the need for studies on indoor climate and energy use in livestock buildings as it will affect animal welfare and farmers’ economy in terms of production, energy demand and needed investments. The aim of this review was to identify knowledge gaps and the need fo
In the context of an infrastructure project UAV-electromagnetic measurements at five areas in southern parts of Sweden are conducted to study the variation of depth to the bedrock. The source signals are the distant radio transmitters in the band 15-350 kHz. The example shown in this work is from Area 5 where the underlying bedrock is a gneissic granite with reasonably high resistivity. The resist
Neural radiance fields (NeRFs) have gained popularity in the autonomous driving (AD) community. Recent meth-ods show NeRFs' potential for closed-loop simulation, en-abling testing of AD systems, and as an advanced training data augmentation technique. However, existing meth-ods often require long training times, dense semantic su-pervision, or lack generalizability. This, in turn, hinders the appl
Aiming for the sixth generation (6G) wireless communications, distributed massive multiple-input multiple-output (MIMO) systems hold significant potential for spatial multiplexing. In order to evaluate the ability of a distributed massive MIMO system to spatially separate closely spaced users, this paper presents an indoor channel measurement campaign. The measurements are carried out at a carrier
This paper explores the evolving landscape of regional innovation policy, focusing on the interplay between traditional cluster policies and emerging transformative agendas. Over the past decade, policy initiatives aimed at fostering place-based, collaborative innovation have proliferated. However, questions arise regarding the adequacy of existing policy tools in accommodating newer, transformati
The anticipated introduction of multi-GHz channel bandwidths in 6G makes integrated passive baseband filters very attractive. This work presents techniques to obtain high stop-band attenuation in a compact 4.7-GHz 5th-order passive baseband filter. A lumped model of the filter inductors is derived, and a capacitive cancellation technique is proposed, along with techniques to reduce inductive coupl
Radar Cross Section measurement data is often analyzed using Inverse Synthetic Aperture Radar images. Backprojection is the conventional method to create these images but is limited in resolution. This paper builds on developments of ℓ1-minimization and iterative smooth reweighted ℓ1-minimization to get superresolution and adding another processing step with Gaussian smoothing. This step improves
Time-frequency reassignment, commonly used to analyze time-varying signals, is a post-processing method that sharpens time-frequency representations. However, the reassignment method is sensitive to noise, making it unsuitable for time-frequency analysis when the signal-to-noise ratio is low. To increase the robustness of the reassignment technique, we develop a novel reassigned multitaper spectro
Visiting research fellow Contact details Email: julen [dot] astigarraga [at] mgeo [dot] lu [dot] seOrganisation Department of Earth and Environmental Sciences (MGeo) Service point: 16 WebpageJulen Astigarragas profile in Lund University research portalOther affiliations Member of Strategic Research Area BECC: Biodiversity and Ecosystem services in a Changing Climate Member of Strategic Research Ar
https://www.nateko.lu.se/julen-astigarraga - 2026-07-18
https://www.astro.lu.se/GaiaNIR/Computation - 2026-07-17
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https://www.sentio.lu.se/accessibility-report - 2026-07-17
