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Real-world deployment of model-free reinforcement learning for energy control in district heating systems : Enhancing flexibility across neighboring buildings

Energy Management Systems (EMSs) often operate through inflexible, rule-based control systems. Model-free reinforcement learning (RL) has emerged as a promising alternative, providing adaptive and autonomous control without the need for detailed modeling. However, the complexity of operating energy systems and dynamic environmental conditions limits their practical use, with most studies relying o

Detection and Localization of Drones and UAVs Using Sound and Vision

In this paper, we present a system for drone detection and positioning. The approach uses a system composed of an audio detection rig with a set of microphones, a set of fixed cameras with a large combined field of view and a Pan-TiltZoom camera. We present how this system can be defined in an efficient and modular way with a number of parallel sensing modules. The focus of this work is the audio

Modeling a Smooth Surface by a Constrained Biharmonic Equation with Application in Soil Science

This paper presents a method for mathematical modelling of surfaces conditioned on empirical data. It is based on solving a discrete biharmonic equation over a domain with given inner point and inner curve data. The inner curve data is used to model boundary values while the inner point data is used for modeling a load vector with the goal to generate a smooth surface. The construction of boundary

DXA-derived three-dimensional finite element models of the femur : validation against CT-based models

Three-dimensional finite element (FE) models derived from Computed Tomography (CT) images predict hip fractures better than areal bone mineral density measurements from Dual-energy X-ray Absorptiometry (DXA). Yet, these results have not justified the adoption of CT in clinical practice, and only 2D DXA images are clinically available. Statistical shape and appearance models can be used to reconstr

Trygghetens skörhet : Utvecklingspsykologiska och människorättsliga perspektiv på situationen för barn i flyktingfamiljer

Kapitlet fokuserar på barn i familjer som sökt asyl i Sverige. Med en utvecklingspsykologisk utgångspunkt adresseras barnens situation och konsekvenserna för deras utveckling och välbefinnande av ett otillräckligt skydd och stöd. Med ett rättighetsbaserat perspektiv diskuteras barnens folkrättsliga skydd samt hur detta upprätthålls i Sverige. Vi avslutar med en reflektion kring prioriteringar fram

The association of post-conization pregnancy with subsequent cervical lesions : evidence from a nationwide cohort in Sweden

Background: Women who have undergone cervical conization may still experience subsequent pregnancies and delivery. However, it remains unknown whether pregnancy, associated with immune tolerance, might increase the risk of subsequent cervical lesions. This study aims to address this knowledge gap by utilizing the nationwide Swedish registers. Methods: A total of 60,895 women diagnosed with cervica

Platformed audio fiction : How streaming and audiobook imaginaries transform contemporary publishing in Sweden

The article examines how the audiobook’s increasing centrality on the contemporary book market influences publishing strategies. Departing from the case of Sweden, where audiobooks are primarily distributed via subscription-based streaming services, the article is based on interviews with 12 Swedish publishers and streaming service representatives. Thus, it contributes with a producer perspective

Adaptive energy management of Swedish residential buildings using artificial intelligence and reinforcement learning for enhanced climate resilience

As the impact of climate change intensifies, there is an urge to adapt Swedish residential buildings with a special focus on improving their energy efficiency and resilience. In this study, adaptive strategies through Artificial Intelligence and Reinforcement Learning will be provided for the energy management of different Swedish residential buildings. The aim will be the optimization of energy u

The Impact of Semi-supervised Learning on Line Segment Detection

In this paper we present a method for line segment detection in images, based on a semi-supervised framework. Leveraging the use of a consistency loss based on differently augmented and perturbed unlabeled images with a small amount of labeled data, we show comparable results to fully supervised methods. This opens up application scenarios where annotation is difficult or expensive, and for domain

Gold impurity concentration in vapor-liquid-solid grown GaAs nanowires

Gold particles are commonly used as catalysts in the vapor-liquid-solid (VLS) growth of GaAs nanowires, but the incorporation of gold into the nanowires can negatively affect their electronic and optical properties. In this work, we investigate the equilibrium concentration of Au in GaAs nanowires using density functional theory calculations combined with thermodynamically assessed chemical potent

Kunskap som naturligt fenomen

Den 10 maj 2024 försvarade Andreas Stephens sin avhandling i teoretisk filosofi vid Lunds universitet. Här presenterar han en kort sammanfattning.

Remissvar från forskargruppen Rättigheter, regleringar och samhälle, Lunds tekniska högskola (LTH), Lunds universitet angående Klimat- och näringslivsdepartements promemoria – Ersättning vid rådighetsinskränkning till följd av artskyddet – KN2026/00002.

Vi är forskargruppen Rättigheter, regleringar och samhälle vid Avdelningen för fas-tighetsvetenskap, Institutionen för teknik och samhälle, LTH, Lunds universitet. Vi har bedrivit och bedriver forskning om regleringen av skogsbruk, mestadels ur ett rättsekonomiskt perspektiv. Vi har bl.a. studerat tillämpningen av Artskyddsförord-ningen och Århuskonventionen. I vår forskning har vi kunnat konstate

Longitudinal associations between cognitive ability and socioeconomic status are partially genetic in nature

Individual’s future socioeconomic status (SES) has been reported to be robustly predicted by cognitive ability (IQ). However, research on the genetic and environmental underpinnings of this association in emerging adults remains limited. Utilizing the German TwinLife panel data, the present study examined how IQ at early adulthood at age 23 is associated with SES at age 27 (NMZ = 228 and NDZ−SAME

Influence of extruded mortar joints on mould growth in timber frame wall with brick veneer : Probabilistic and machine learning modelling

Inappropriate bricklaying techniques can result in extruded mortar joints, which may partially fill the air gaps within brick veneer timber frame walls. This leads to an unintended connection or “bridge” between the brick masonry cladding and its adjacent layer (such as insulation or weather-resistant barriers). This bridging effect compromises the capillary break function of the air gap, allowing

Probabilistic Analysis of Various Hygroscopic Insulations : Impacts on Mould Growth and Energy Efficiency in Timber Frame Walls

Highly insulated external wall assemblies are commonly employed to enhance building energy performance. However, research indicates that these assemblies may lead to moisture-related issues, such as mould growth. Recent studies suggest that the use of highly hygroscopic insulation materials, owing to their higher moisture buffering value, may mitigate relative humidity levels and consequently the

Hardened Responsibility? : Contestations and Contradictions in the Regulation of Corporations

Throughout the last decades, the social responsibility of corporations has undergone significant changes. From revolving around self-regulation, voluntariness, and soft law, the regulatory landscape has expanded to involve harder demands on corporations, such as mandatory sustainability due diligence. This thesis considers these changes as a hardening of Corporate Social Responsibility (CSR), and

Remissvar över betänkande från utredningen "Effektivare organisering och genomförande av statlig väg och järnväg" (SOU 2025:120)

Lunds Tekniska Högskola har beretts tillfälle att inkomma med yttrande över remissen ovan och inkommer härmed med synpunkter. Yttrandet har utarbetats av Ingemar Bengtsson, avdelningsföreståndare och universitetslektor vid Fastighetsvetenskap, och Carl-William Palmqvist, docent och universitetslektor i järnvägsteknik vid Trafik och väg. Vi håller med om problembeskrivningen att Sverige står inför

Shape and topology optimization for contact applications

This paper combines density-based topology optimization (TO) with a “contact aware” shape optimization (SO) which combines the design freedom of TO with the precise boundary representation of SO. Using gradient based optimization, the objective is to design structures in frictionless contact, including the shape of the contacting surfaces. SO is performed on each contacting structure which defines