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Thermoelectric fingerprinting of Bloch- and Néel-type skyrmions
Get PDFMagnetic skyrmions are nanoscale spin textures that exhibit topological stability, which, along with their thermal and electrical transport properties, make them the ideal candidates for a variety of technological applications. Accessing the skyrmion spin texture at the nanoscale and understanding its interaction with local thermal gradients is essential for engineering skyrmion-based transport phenomena. However, direct experimental insight into the local thermoelectric response of single skyrmions remains limited. To address this, we employ scanning thermoelectric microscopy (SThEM) to probe the nanoscale thermoelectric response from a single skyrmion. By mapping the local thermoelectric voltage with nanoscale precision, we reveal a unique spatially resolved response that is the convolution of the underlying spin texture of the skyrmion and its interaction with the highly localized thermal gradient originating from the heated probe. We combine this with thermoelectric modelling of a range of skyrmion spin textures to reveal unique thermoelectric responses and allow the possibility of SThEM to be used as a tool to distinguish nanoscale spin textures. These findings provide fundamental insights into the interaction of topologically protected spin textures with local thermal gradients and the resultant spin transport. We demonstrate a route to thermally characterize nanoscale spin textures, accelerating the material optimization cycle, while also opening the possibility to harness skyrmions for spin caloritronics
A sibling of AR Scorpii: SDSS J230641.47+244055.8 and the observational blueprint of white dwarf pulsars
Get PDFEvidence for longitudinally polarized W Bosons in the electroweak production of same-sign W Boson pairs in association with two jets in pp Collisions at √s = 13 TeV with the ATLAS detector
Get PDFCropping room impulse responses using unimodal regression of their covariance
Get PDFThe presence of unavoidable background noise limits the signal-to-noise ratio in measured room impulse responses (RIRs). A common solution is to crop the RIR to the time interval where the signal dominates the background noise, but finding the correct onset and truncation points is challenging. It usually requires estimating the sound decay rate and noise floor, which is burdened with uncertainty. In this study, we propose an RIR cropping method based on the covariance between two repeated RIRs and its inherent monotonicity. Evaluation on measured RIRs shows the proposed method is highly robust in different scenarios and outperforms state-of-the-art algorithms
DataRES and PyRES: A Room Dataset and a Python Library for Reverberation Enhancement System Development, Evaluation, and Simulation
Get PDFReverberation is crucial in the acoustical design of physical spaces, especially halls for live music performances. Reverberation Enhancement Systems (RESs) are active acoustic systems that can control the reverberation properties of physical spaces, allowing them to adapt to specific acoustical needs. The performance of RESs strongly depends on the properties of the physical room and the architecture of the Digital Signal Processor (DSP). However, room-impulse-response (RIR) measurements and the DSP code from previous studies on RESs have never been made open access, leading to non-reproducible results. In this study, we present DataRES and PyRES—a RIR dataset and a Python library to increase the reproducibility of studies on RESs. The dataset contains RIRs measured in RES research and development rooms and professional music venues. The library offers classes and functionality for the development, evaluation, and simulation of RESs. The implemented DSP architectures are made differentiable, allowing their components to be trained in a machine-learning-like pipeline. The replication of previous studies by the authors shows that PyRES can become a useful tool in future research on RESs
An unclean slate, discrepancies between food input and recovered protein signal from experimental foodcrusts
Get PDFOrganic residues are a rich source of biomolecular information on ancient diets. In particular, foodcrusts, charred residues on ceramics, are commonly analysed for their lipid content and to a lesser extent protein in order to identify foods, culinary practices and material culture use in past populations. However, the composition of foodcrusts and the factors behind their formation are not well understood. Here we analyse proteomic data (available via ProteomeXchange with identifier PXD059930) from foodcrusts made using a series of mixtures of protein- (salmon flesh), lipid- (beef fat) and carbohydrate-rich (beetroot) foods to investigate the relationship between the biomolecular composition of the input and the recovered signal using conventional methods applied to archaeological material. Additionally, using 3D modelling we quantify the volume of foodcrust generated by different ingredient combinations The results highlight biases in the data obtained in the analyses of organic residues both in terms of identified resources reflecting the cooked foodstuffs, e.g., an overrepresentation of fish proteins, as well as with regards to the abundance of foodcrust, for example mixtures of only salmon and beef fat resulted in relatively small amounts of foodcrust, and suggest caution in interpreting the composition of residues formed from complex mixtures of foodstuffs
CLOUDSENSE Collaborative Review of Wikipedia Cloud Physics article
Get PDFThis is a collaborative review of the Wikipedia cloud physics article produced collaboratively by climate experts on the CLOUDSENSE research programme. CLOUDSENSE is a consortium of research projects funded by the UK Natural Environment Research Council to improve our understanding of how clouds interact with climate. The aim of this activity was to generate an expert review that Wikipedia editors can use to improve the page. A number of existing editors have already volunteered to enact some of the changes. A more concise version of the review, along with a link to this document will be posted on the Wikipedia cloud physics Talk page
Lived Experience and Messenger Credibility: A Replication Study on P/CVE Messenger Credibility in Germany
No full textThis study examines messenger credibility in preventing and countering violent extremism (P/CVE), comparing lived experience (i.e. former extremist and victims of terrorism) messengers to professional experts using experimental data from a representative German sample (N = 2004). Findings suggest institutional messengers may be more credible due to professional expertise, challenging assumptions about lived experience credibility. Replicating a UK study with a refined design, this research enhances understanding of P/CVE messenger credibility, offering key insights for policy and P/CVE communication strategies
Search for emerging jets in pp collisions at √s=13.6 TeV with the ATLAS experiment
Get PDFA search for emerging jets is presented using 51.8 fb−1 of proton–proton collision data at √s=13.6 TeV, collected by the ATLAS experiment during 2022 and 2023. The search explores a hypothetical dark sector featuring ‘dark quarks’ that are charged under a confining gauge group and couple to the standard model (SM) via a new mediator particle. These dark quarks undergo showering and hadronisation within the dark sector, forming long-lived dark mesons that decay back into SM particles. This results in jets that contain multiple displaced vertices known as emerging jets. The analysis targets events with pairs of emerging jets, produced either through a vector mediator, Z′, in the s-channel, or a scalar mediator, Φ, in the t-channel. No significant excess over the SM background is observed. Assuming a dark pion proper decay length between 5 mm and 50 mm, Z′ mediator masses between 600 GeV and 2550 GeV are excluded for quark and dark quark coupling values of 0.01 and 0.1, respectively. For a quark dark-quark coupling of 0.1, Φ mediator masses between 600 GeV and 1375 GeV are excluded. These results represent the first direct search targeting emerging jet pair production via a Z′ mediator, as well as the first study of emerging jet production mediated by a scalar particle exchanged in the t-channel
Moving off script: A/synchronous storytelling with family carers and people with learning disabilities
No full textThis paper is about digital storytelling in the context of health and social care research with people with learning disabilities and family carers in the United Kingdom. We explain how we were drawn to decolonial thinking in the formulation of ‘metodologia otra’ to think again about the processes and practices of (digital) storytelling in health and social care research. We conclude by reflecting on what we learned about digital storytelling methods and the need to ‘move off script’ as an ethical response to storytellers who want to tell the stories that matter to them in ways that matter to them
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