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Din sökning på "2025" gav 23459 sökträffar

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Heavy-flavor quarks produced in proton-proton (pp) collisions provide a unique opportunity to investigate the evolution of quark-initiated parton showers from initial hard scatterings to final-state hadrons. By examining jets that contain heavy-flavor hadrons, this study explores the effects of both perturbative and nonperturbative QCD on jet formation and structure. The angular differences betwee

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This paper presents a search for physics beyond the Standard Model targeting a heavy resonance visible in the invariant mass of the lepton-jet system. The analysis focuses on final states with a high-energy lepton and jet, and is optimised for the resonant production of leptoquarks — a novel production mode mediated by the lepton content of the proton originating from quantum fluctuations. Four di

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Measurements of integrated and differential cross-sections for W±Z production in proton-proton collisions are presented. The data collected by the ATLAS detector at the Large Hadron Collider from 2015 to 2018 at a centre-of-mass energy of s=13 TeV are used, corresponding to an integrated luminosity of 140 fb−1. The W±Z candidate events are reconstructed using leptonic decay modes of the gauge boso

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Background and ObjectivesThe number of older adults living alone is increasing globally, often with varied risks and resilience capacities. Digital technologies may help mitigate these risks, but their potential remains poorly understood. This review maps evidence on digital technologies in social and health care interventions for older adults living alone, focusing on technology types, functions,

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The consequences of climate change include an increased risk of landslides, erosion and flooding of buildings in cities. Swedish municipalities have a planning monopoly, which means they have autonomy over urban planning and consequently a responsibility to climate-adapt their cities. It is not enough to focus solely on reducing emissions, climate adaptation measures must also be implemented. To m

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Agricultural intensification is a major driver of biodiversity loss, which highlights the need for effective policy instruments that promote sustainable farming. Therefore, the EUs common agricultural policy (CAP) plays a major role, especially the voluntary eco-schemes that are designed to incentivize such practices. However, the effectiveness of these policies depends both on farmer participatio

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Objectives To identify and describe frameworks for systematically identifying research gaps from evidence syntheses, framing research needs, and establishing priorities, with emphasis on their use of GRADE (Grading of Recommendations Assessment, Development and Evaluation) certainty of evidence (CoE) domains and evidence-to-decision (EtD) criteria. Study Design and Setting We conducted a scoping r

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Growing concerns around resource depletion and climate change has made freshwater scarcity an increasingly urgent issue for cities around the world. In Cape Town, this became especially visible during the 2018 Day Zero crisis, when the City of Cape Town faced the possibility of its municipal water supply systems reaching a critical failure point. This thesis examines how freshwater scarcity in Cap

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Background Increased airflow is reported as helpful in reducing the sensation of breathlessness. This systematic review aimed to assess the effectiveness of airflow on breathlessness (primary outcome, measured using a validated tool at rest or during exercise) and health-related quality of life (secondary outcome) in people with serious respiratory illness. Methods We searched Ovid MEDLINE, Embase

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The basic purpose of this study is to observe the association between firm sustainability and board quality, along with examining the moderating effect of the sustainability committee. Agency theory, resource dependence theory, stakeholder theory, legitimacy theory, and upper echelons theory are used as the theoretical bases of this study. Agency theory describes the supervising role of directors,

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This study aims to assess the performance and importance of mangrove ecosystem services, focusing on supporting, provisioning, and regulating, and to investigate temporal changes in mangrove cover in Maputo Bay, Mozambique. It also examines the drivers behind these changes. The research questions address stakeholder perceptions of ecosystem services and their potential trade-offs, temporal changes

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This study examines the crisis communication of the Swedish and Norwegian royal houses in relation to the Jeffrey Epstein scandal. While Situational Crisis Communication Theory (SCCT) and Image Repair Theory (IRT) are built on a corporate logic of interchangeable leadership and organizational accountability, this thesis addresses an application gap: monarchies are institutions where legitimacy is

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Glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP) regulate islet function after carbohydrate ingestion. Whether incretin hormones are of importance for islet function after ingestion of noncarbohydrate macronutrients is not known. This study therefore examined integrated incretin and islet hormone responses to ingestion of pure fat (oleic acid; 0.88 g/kg) or pr

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Introduction: Our objective was determining the optimal combinations of cerebrospinal fluid (CSF) biomarkers for predicting disease progression in Alzheimer's disease (AD) and other neurodegenerative diseases. Methods: We included 1,983 participants from three different cohorts with longitudinal cognitive and clinical data, and baseline CSF levels of Aβ42, Aβ40, phosphorylated tau at threonine-181

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Twenty years have passed since first light for the Sloan Digital Sky Survey (SDSS). Here, we release data taken by the fourth phase of SDSS (SDSS-IV) across its first three years of operation (2014 July-2017 July). This is the third data release for SDSS-IV, and the 15th from SDSS (Data Release Fifteen; DR15). New data come from MaNGA - we release 4824 data cubes, as well as the first stellar spec

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The cardiovascular regulation in humans depends to a major extent on sympathetic reflexes originating from volume receptors in the arterial as well as the cardiopulmonary region. With experimental approaches, such as lower body negative pressure (LBNP) and tilting, signs of reduced efficiency with ageing have been shown. However, a confounding factor may be an age-related decline in venous capacit