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The recently developed Phase-Scaled Reassignment (PSR) can estimate phase-difference between two oscillating transient signals with high accuracy. However, in low signal-to-noise ratios (SNRs) the performance of commonly applied reassignment techniques is known to deteriorate. In order to reduce variance in low SNR, we propose a multitaper PSR (mtPSR) method for phase-difference estimation between
Coherence is a useful measure in many engineering applications. Here, we focus on the case where the input signal to a linear system can be measured free from noise, but the output signal is perturbed by noise. A novel expression for the expectation of a multitaper magnitude squared coherence estimate for this case is presented and verified through numerical evaluation. Additionally, the expressio
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
In the literature, auditory attention is explored through neural speech tracking, primarily entailing modeling and analyzing electroencephalography (EEG) responses to natural speech via linear filtering. Our study takes a novel approach, introducing an enhanced coherence estimation technique to assess the strength of neural speech tracking. This enables effective discrimination between attended an
Nanoplastics have been proven to induce toxicity in diverse organisms, yet their effect on soil microbes like bacteria and fungi remains largely unexplored. In this paper, we used micro-engineered soil models to investigate the effect of polystyrene (PS) nanospheres on Pseudomonas putida and Coprinopsis cinerea. Specifically, we explored the effects of increasing concentrations of 60 nm carboxylat
We have used a continuous-wave bi-static lidar system based on the Scheimpflug principle in measurements on flying insects above, and in the vicinity of, a small lake located in a forested area in Southern Sweden. The system, which operates on triangulation principles, has a high spatial resolution at close distance, followed by a subsequent decline in resolution further from the sensor, related t
The great variety of earth's microorganisms and their functions are attributed to the heterogeneity of their habitats, but our understanding of the impact of this heterogeneity on microbes is limited at the microscale. In this study, we tested how a gradient of spatial habitat complexity in the form of fractal mazes influenced the growth, substrate degradation, and interactions of the bacterial st
Populärvetenskaplig sammanfattning: Det var torkan under åren 1968 - 1973 som fokuserade världens uppmärksamhet till Sahelregionen, som är ett smalt bälte mellan Saharaöknen i norra Afrika och grässlätterna söder därom. De ovanligt torra åren hade lett till matbrist i form av förstörda skördar och annan vegetation, samt boskapsdöd. Året 1973 nådde torkan sitt klimax i Sahelområdet, vilket fick tilDrought is primarily caused by reduced precipitation and is dependent on physical factors such as climate, geology, freshwater and vegetationcover, as well as the political, economical and social situation. Drought in the Sahel region during the last decades and the scale of the human tragedy that followed have underlined the need for system to monitor crop and vegetation conditions. The object of
Smart microscopy is transforming life sciences by automating experimental imaging workflows and enabling real-time adaptation based on feedback from images and other data streams. This shift increases throughput, improves reproducibility, and expands the functional capabilities of microscopes. However, the current landscape is highly fragmented. Academic researchers often develop custom solutions
Transient activation of fibroblasts into contractile myofibroblasts is essential for extracellular matrix (ECM) production and remodeling during wound healing and tissue regeneration. While ECM-dependent mechanisms mediating transient activation is well studied, how fibroblasts switch from transient to a persistently activated state and drive fibrosis and aberrant tissue repair in diseases such as
Group A Streptococcus (GAS) causes extensive global morbidity and rising rates of invasive disease, for which clinical outcomes remain poor despite antibiotic treatment of susceptible strains. This limitation of current therapy underscores the need for alternative or adjunctive approaches. Antibody-based interventions represent a promising but underexplored strategy. Historically, the streptococca
Premise: Flower color, a key trait influencing plant–pollinator interactions, may be influenced by abiotic factors such as soil. We investigated association between pollinators, soil characteristics, and flower color variations in Digitalis purpurea across native populations in Sweden and introduced populations in Bolivia. Methods: We measured floral traits, reflectance of petals and nectar-guide
Tillämpningen av lagen (1991:572) om särskild utlänningskontroll har de senaste åren kraftigt ökat. Lagen avser kvalificerade säkerhetsärenden och möjliggör för Säkerhetspolisen att ta utländska medborgare som bedöms utgöra en fara för rikets säkerhet i förvar i avvaktan på att de utvisas. Eftersom utvisningarna sällan kan verkställas med anledning av risken för omänsklig behandling i mottagandelaThe application of the Act (1991:572) Concerning Special Controls in Respect of Aliens have had a major increase these last few years. The law refers to qualified security cases and enables the Security Police to take foreign citizens who are deemed to pose a danger to national security into custody pending their deportation. As the deportations can seldom be carried out due to the risk of inhuman
This thesis presents a derivation of the equation of motion of particles in a dust star, as it undergoes collapse. This is done by finding exact solutions to the Einstein field equations. We follow the original work by Oppenheimer and Snyder, starting from the general spherically symmetric metric in comoving coordinates. Further, a rederivation of the work by Chen, Adler, Bjorken and Liu shows tha
En psykiskt störd lagöverträdare behöver i majoriteten av världens länder be-dömas vara tillräknelig för att kunna hållas straffrättsligt ansvarig för en brottslig gärning, det vill säga ha insikt och kontroll över sitt handlande vid gärningstillfället. I Sverige avskaffades detta så kallade tillräknelighetskrav i samband med införandet av brottsbalken 1965. Idén bakom lagändringen byggde på föreMost legal orders contain a requirement that a mentally disturbed offender must be considered sane in order to be held criminally responsible, in other words these offenders will only be imposed liability if they have had insight and control over their actions during the criminal act. However, in Sweden, this exemption from criminal responsibility was abolished in conjunction with the passing of
Entreprenadavtal avser i allmänhet omfattande och långvariga arbeten som inbegriper flera olika parter. Det är relativt vanligt förekommande att parterna har olika åsikt gällande hur ett specifikt avtalsvillkor ska tolkas. Det finns ingen entreprenadrättslig lagstiftning. Företrädare för BKK, Byggandets Kontraktskommitté, har framförhandlat standardkontrakt. Standardkontrakten har en stark ställniConstruction contracts generally refer to extensive and long-term projects involving several different parties. It is relatively common for the parties to have different opinions regarding how a specific contractual term should be interpreted. There is no construction contract law in the area. Hereby representatives of the BKK, the Construction Contracts Committee, have negotiated standard contrac
Antal fordon i trafiken börjar bli allt fler och fler. Detta leder till att vägar behöver underhållas emellanåt. För att åtgärda vägarna så krävs det vägarbetare på plats, 90% av dessa vägarbetare känner oro dagligen på sitt jobb. Anledningen till deras oro är att många trafikanter inte tar någon hänsyn till vägarbetare, de kör aggressivt, hänsynslöst och över hastighetsgränsen. Under åren 2003-20The number of vehicles in traffic is increasing. This means that roads need to be maintained regularly. To repair the roads, road workers are required on site. Ninety percent of these road workers feel anxious daily at their work. The reason for their concern is that many road users do not pay any attention to road workers, they drive aggressively, ruthlessly and over the speed limit. During the y
Projektplan. Ett byggprojekt kräver att man har tillstånd till att bygga. För att få det tillståndet ansöker man om bland annat bygglov och bygganmälan. Det krävs när man ska göra nybygge och tillbyggnad. Bygglovet behandlar idag bla områdes regler enligt detaljplan och miljöregler. Medans bygganmälan behandlar det tekniska aspekterna. Hur kommer dessa två handlingar att påverkas efter det att lag
Aquaglyceroporin 7 (AQP7) facilitates glycerol flux across the plasma membrane with a critical physiological role linked to metabolism, obesity, and associated diseases. Here, we present the single-particle cryo-EM structure of AQP7 determined at 2.55 Å resolution adopting two adhering tetramers, stabilized by extracellularly exposed loops, in a configuration like that of the well-characterized in
