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Modern battery chargers require AC-DC converters with high input power quality, nearly unity power factor, and low current harmonics to meet grid standards such as IEC 61000-3-2. This paper proposes a two-stage charger topology: a front-end bridgeless interleaved boost PFC converter followed by a synchronous buck DC-DC stage. The interleaved boost stage reduces input current ripple and losses whil

BACKGROUND: There is limited information concerning the current practice of intraoperative mechanical ventilation in obese patients, and the optimal ventilator settings for these patients are debated. We investigated intraoperative ventilation parameters and their associations with the development of postoperative pulmonary complications (PPCs) in obese patients.METHODS: We performed a secondary a

The market for fully electrified vehicles is expanding fast. The number of sources and loads that are connected to the vehicles traction voltage systems (TVS) are increasing and thus also the ElectroMagnetic Compatibility (EMC) requirements on these sources and loads. These requirements should make sure that neither function nor lifetime of any source or load is severely affected by another. The C

Objective This study aims to investigate whether oral fluoroquinolone use is associated with an increased risk of aortic and mitral valve regurgitation. Design A nationwide cohort study based on linked healthcare register data encompassing patient characteristics, prescription data and cases of aortic and mitral valve regurgitation. Setting Sweden, 2006–2018. Participants Study participants were a

Background. Seeking to clarify the parent-offspring transmission of Major Depression (MD) and type I Bipolar Disorder (BD), we examined offspring MD and BD risk in five informative parental pairs: Unaffected x MD, Unaffected x BD, MDxMD, MDxBD and BDxBD. Methods. We identified 289,637 individuals born in Sweden 1970-1990, followed through 2018, from parents with MD and/or BD identified from Swedis

Nickel phosphides are promising earth-abundant, low-cost catalysts for hydrogen/oxygen evolution reactions and CO2 reduction. However, their formation mechanisms remain poorly understood and difficult to control. This particularly applies to mechanisms determining phase evolution, crystallinity, and morphology under reactive conditions, factors that critically influence catalytic activity and stab

Standard quantum measurements are projective. However, the full scope of quantum measurements is represented by positive operator-valued measures (POVMs) and many of these break the limitations of projective measurements as resources in quantum information. It is therefore natural to consider how accurately an experimenter with access only to projective measurements and classical processing can si

Animals have evolved multiple sensory systems that can acquire environmental information guiding their behaviour, allowing them to adapt physiological parameters to current conditions. However, over the past century, anthropogenic changes have increasingly made information on environmental conditions less reliable, by introducing novel elements (such as synthetic chemicals or artificial light), by

Bakgrund Inläggning av central venaccess, exempelvis central venkateter (CVK), är en invasiv åtgärd som kräver sterila betingelser för att förhindra introduktionen av mikroorganismer till blodbanan med en ökad risk för kolonisation respektive kateterrelaterad infektion. Med ett strukturerat arbetskoncept kan man uppnå en infektionsincidens nära noll. Flera aspekter är betonade i riktlinjerna, men

Electronics repair is a core component of a circular economy, yet the many social, technical, and financial barriers limit the widespread adoption of repair practices along the value chain. The high complexity of electronics, reinforced by product design choices, and a perpetuating culture of consumption has normalised replacement when a fault occurs. Similarly, a lack of technical knowledge, unce

Bakgrund: Preoperativ anemi är en välkänd riskfaktor för ett sämre kirurgiskt utfall. Hos patienter med flera riskfaktorer för postoperativa komplikationer är anemi den som lätt kan hanteras inom den tillgängliga tidsramen före operationen. I de fall denna hantering inte genomförs är det dock viktigt att förstår dess negativa påverkan jämfört med andra riskfaktorer. Denna studie syftade till att u

The decarbonisation of industry, which is a significant contributor to greenhouse gas emissions, is closely linked to the energy system and its transformation. This study quantifies the impacts of industrial decarbonisation on the European energy system, considering uncertainties in electricity and hydrogen demand and constraints on renewable energy sources (RES) deployment and cross-border infras

Sensitive detection of short nucleic acids is used to identify viral and bacterial diseases, detect biomarkers of cancer, as well as in gene expression studies. Currently available techniques such as PCR, electrochemical detection and SPR are typically costly and often require amplification of the DNA. Here, we demonstrate a sensing system for picomolar detection of short single-stranded DNA by fl

Background The aim of this systematic review and meta-analysis was to examine autoantibody positive individuals and define: (a) the relative risk of rheumatoid arthritis (RA) compared with autoantibody negative individuals and (b) the cumulative incidence of RA over time, in different populations. Methods A systematic literature search was performed in August 2025. Retrospective case control studi

Astrometric observations can, in principle, be used to detect gravitational waves. In this paper, we give a practical overview of the gravitational wave effects which can be expected specifically in small-field astrometric data. Particular emphasis is placed on the differential effect between pairs of sources within a finite field of view. We also present several general findings that are not rest

Animals align their body in relation to different environmental cues, including spontaneous directional responses relative to the geomagnetic field known as magnetic body alignment. The biological significance of this behavior, however, remains undetermined for most taxa. In previous studies, migratory songbirds aligned their body with the cardinal directions of the geomagnetic field and their mig

Scholars have characterized Cambodia as a weak state, strong party governance system in which administrative institutions are subordinated to the ruling Cambodian People’s Party (CPP). This article argues that since 2013 Cambodian governance has taken a significant technocratic turn, as party rule has become increasingly dependent on a stronger and more capable administrative state. It traces a re

District heating networks are an integral part of the energy system in many countries. In future smart energy systems, they are expected to enhance energy flexibility and support the integration of renewable and waste energy sources. An important aspect of these networks is the control of flow rates, which dictates the heat delivered to consumers. This paper concerns the properties of flow rates i