Sökresultat

This article elaborates on a technique for rapid real-time imaging of millimeter-wave (mmWave) power density over surfaces of several wavelengths in size. The approach involves using a screen-printed metasurface equipped with elements designed for absorption of mmWaves, along with an infrared (IR) camera to monitor temperature changes due to the absorption. By modulating the transmitted signal and

Climatic feedbacks and ecosystem impacts related to dust in the Arctic include direct radiative forcing (absorption and scattering), indirect radiative forcing (via clouds and cryosphere), semi-direct effects of dust on meteorological parameters, effects on atmospheric chemistry, as well as impacts on terrestrial, marine, freshwater, and cryospheric ecosystems. This review discusses our recent und

We have prepared electrodes for photo-electro-chemical cells which have enabled to pre-charge colloidal quantum dots in well-controlled fashion. Femtosecond transient absorption measurements were carried out revealing clear speed-up of the photo-induced charge carrier dynamics, particularly the recombination. Such studies allow to understand the behavior of light harvesting materials in operationa

Background: The longevity for people with intellectual disability (ID) has significantly increased in developed countries during the past decades. Consequently, the incidence of cancer is expected to increase in this group. The aim of the present study was to investigate the prescription of pain medication in older cancer patients with intellectual disability (ID) compared to older patients in the

A new environmental transmission electron microscope has been installed in Lund in order to investigate the growth of III-V semiconductor nanowires by metal-organic chemical vapour deposition. We report here on the concepts behind the design of the facility and on details of the operation, and we refer to early results to highlight the new information that can be accessed from in situ studies. The

The amount and quality of greenness in the local outdoor environment has repeatedly been linked to human well-being. Different types of green areas are likely required in order to meet the various needs of people throughout the course of their lives and with regard to individual social and economic living conditions. The aim of the present study was to increase the understanding of different pathw

Many studies suggest that increased exposure to urban greenness is associated with better population health. Accessing nature can in some circumstances, however, be difficult, especially for individuals with mobility constraints. Therefore, a growing body of work is investigating the ways to replace the in vivo experience with forms of “virtual” contact, in order to provide these individuals with

CV Shirin Sabahi Born in Tehran Lives in Berlin Education 2007-2009 – MFA, Malmö Art Academy, Lund University, Malmö 2005-2007 – AA Photography, Art University, Tehran 2002-2007 – BA Industrial Design, Iran University of Science and Technology, Tehran Solo & Two-Person Exhibitions 2014 – Ornithorhynchus Paradoxus (w. Sebastien Berthier), Sox, Berlin 2014 – Muted Fanfare for the Shy, Krognoshuset,

https://www.khm.lu.se/sites/khm.lu.se/files/2009cv_shirin_sabahi.pdf - 2026-05-30

This paper presents a novel low-profile, single-layer, differentially-fed microstrip antenna with a flat-top beam (FTB). By incorporating a central hexagonal slot together with four elongated slots and two short slots, the proposed antenna tailors high-order modes to achieve the desired radiation characteristics. By analyzing the electric field, the distribution in various regions is decomposed an

Full-duplex (FD) communication improves spectral efficiency by allowing simultaneous transmission and reception on the same frequency band. This paper analyzes a two-tier network consisting of macrocells and picocells, where base stations (BSs) operate in FD mode while users operate in half-duplex (HD) mode. However, interference remains a major challenge in these systems, significantly impacting

Massive multiple input, multiple output (MIMO) systems are crucial for enhancing spectral efficiency and link reliability in next-generation wireless communications. However, high Peak-to-Average Power Ratio (PAPR) remains a significant challenge, leading to power inefficiencies and signal distortion. This paper presents a low complexity method for PAPR reduction using hard clipping tailored for f

Rapport vecka 41 (publicerad 2020-10-14) COVID Symptom Study Innehåll Bakgrund 2 Metod 2 Etiskt godkännande 5 Aktuell status 5 10 postnummerområden med lägst andel studiedeltagare med symtom överensstämmande med covid-19 den 12 oktober . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Störst ökning senaste 7 dagarna . . . . . . . . . . . . . . . . . . . . . . . . . .

https://www.covid19app.lu.se/sites/covid19app.lu.se/files/rapport_vecka41_coss.pdf - 2026-05-30

We apply two sparse reconstruction techniques, the least absolute shrinkage and selection operator (LASSO) and the sparse exponential mode analysis (SEMA), to two-dimensional (2D) spectroscopy. The algorithms are first tested on model data, showing that both are able to reconstruct the spectra using only a fraction of the data required by the traditional Fourier-based estimator. Through the analys

We address the recognized person-to-person Brain–Computer Interface (BCI) calibration problem and tackle session-dependency through the use of unsupervised canonical polyadic (CP) tensor decomposition. For a motor imagery task, the approach reveals universal structures within EEG data, common between subjects and prominent for a certain task. Further, we develop a novel similarity measure that inc

The number of degrees of freedom (NDoF) in a communication channel fundamentally limits the number of independent spatial modes available for transmitting and receiving information. Although the NDoF can be computed numerically for specific configurations using singular value decomposition (SVD) of the channel operator, this approach provides limited physical insight. In this paper, we introduce a