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Your search for "2025" yielded 28886 hits

Diffuse fluorescence tomography for photodynamic therapy of tumors

We develop and validate diffuse optical tomography methods based on interstitial fluorescence measurements for the reconstruction of fluorescent photosensitizing drug spatial distribution. We propose another phase in the tomographic reconstruction algorithm resulting in quantitatively more accurate reconstruction. This quantitative information can be used to monitor the temporal evolution of the p

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

Signposting to offline services in Swedish social services’ online counselling

This paper examines the practice of signposting in online counselling provided by the social services in Sweden. Specifically, it focuses on cases where online users are steered to seek offline help. The data corpus consists of 68 online chat logs (quasi-synchronous interactions) and 200 Internet question form exchanges (asynchronous interactions). The data were examined using the approach of conv

Combined impacts of extreme climate events and pandemic on future energy use in low-income households in Greater London

The impact of the COVID-19 pandemic on building energy use has been studied across various countries. However, with the growing trend toward flexible working and the rising frequency of climate-induced extreme weather events, the combined effects of these factors on future energy use remain largely unexplored. This study develops a methodology to investigate the resilience of the UK's low-income h

Light Transmission in Sprays Impacted by Multiple Light Scattering:Monte Carlo Simulation Assuming the ECN Spray G

In this study, Monte Carlo simulation of photon transport through sprays has been achieved using the online “Multi-Scattering” software. Such simulations were focused on evaluating the accuracy of light transmission measurement of four distinct methods using diffuse light illumination without filtering (1),collimated homogeneous laser beam without filtering (2), structured collimated laser beam wi

Experimental investigation of slotted-in plate moment connections in timber frame buildings

In the past decades, the number of research work explaining the load transfer mechanism of moment connections has increased due to their advantages of energy dissipation capacity and improved load distribution. The use of bolts in slotted-in plate moment connections is a common practice in timber construction. However, the design and application guidelines are still limited and leading to results

Optimization-Based Path-Velocity Control for Time-Optimal Path Tracking under Uncertainties

This paper addresses the path-tracking problem of time-optimal trajectories under model uncertainties, by proposing a real-time predictive scaling algorithm. The algorithm is formulated as a convex optimization problem, designed to balance the trade-off between improving feasibility and time optimality of a trajectory. The predicted trajectory is scaled based on the presence of path segments that

Estimating Instrument Spectral Response Functions Using Sparse Representations and Quadratic Envelopes

The estimation of high resolution spectrometer Instrument Spectral Response Functions (ISRFs) is crucial because an imperfect knowledge of these functions can induce errors in the measurements. The state-of-the-art for this problem currently relies on the use of parametric models, which frequently lack flexibility to accurately model real-world ISRFs. To address this limitation, this paper propose

Large Eddy Simulation of a model jet-engine swirl-stabilized flame using sustainable aviation fuels

Sustainable Aviation Fuels (SAF) typically exhibit a composition that differs significantly from conventional jet fuels. These variations in chemical makeup influence the thermophysical and reactive properties of these propellants. In this study, Finite-Rate Chemistry (FRC) Large Eddy Simulations (LES) are employed to investigate turbulent spray flames from a Triple Annular Research Swirler (TARS)

Sustainability of transport packaging in e-commerce : a systematic literature review

Purpose:The purpose is to identify factors influencing the environmental sustainability of e-commerce packaging across its lifecycle.Design/methodology/approach:A systematic literature review captured 45 articles. To categorise the literature, a conceptual framework based on a lifecycle perspective was developed. An actor perspective analysed their influence and responsibilities.Findings:Five fact

Unraveling Late Quaternary Climate Dynamics: Insights from the Velika Vrbica Loess-Palaeosol Sequence, Wallachian Basin

The Velika Vrbica loess-palaeosol sequence (LPS) in northeastern Serbia, located at the westernmost boundary of the Wallachian Basin, provides a high-resolution terrestrial archive of palaeoenvironmental changes spanning Marine Isotope Stages (MIS) 3 to MIS 1. This study integrates optically stimulated luminescence (OSL) dating, magnetic susceptibility (χ), and mass accumulation rates (MAR) to rec

LED Lighting with a Photovoltaic System and Energy Storage for a Jogging Track in the Countryside

Our research aims to develop an intelligent control system for optimizing the operation of lighting systems for a jogging track in the countryside by using adaptive control methods, and optimization of built-in lighting control. Through this, lighting systems will be optimized, energy consumption will be minimized and the lighting system will be adapted to be able to handle a larger amount of loca