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- Strandberg, B., et al.
(author)
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Compton scattering from the deuteron above pion-production threshold
- 2018
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In: Physical Review C. - 2469-9985. ; 98:1
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Journal article (peer-reviewed)abstract
- The electromagnetic polarizabilities of the nucleon are fundamental nucleon-structure observables that characterize its response to external electromagnetic fields. The neutron polarizabilities can be accessed from Compton-scattering data on light nuclear targets. Recent measurements of the differential cross section for Compton scattering on the deuteron below the pion-production threshold have decreased the uncertainties in the neutron polarizabilities, yet the proton polarizabilities remain known substantially more accurately. As the sensitivity of the cross section to the polarizabilities increases with incident photon energy, measurements above the pion threshold may offer a way for an improved determination of the neutron polarizabilities. In this Rapid Communiciation, the first measurement of the cross section for coherent Compton scattering on the deuteron above the pion-production threshold is presented.
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- Costa, Nathalia, et al.
(author)
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A Definition of "Flare" in Low Back Pain: A Multiphase Process Involving Perspectives of Individuals With Low Back Pain and Expert Consensus
- 2019
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In: Journal of Pain. - : CHURCHILL LIVINGSTONE. - 1526-5900 .- 1528-8447. ; 20:11, s. 1267-1275
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Journal article (peer-reviewed)abstract
- Low back pain (LBP) varies over time. Consumers, clinicians, and researchers use various terms to describe LBP fluctuations, such as episodes, recurrences and flares. Although "flare" is use commonly, there is no consensus on how it is defined. This study aimed to obtain consensus for a LBP flare definition using a mixed-method approach. Step 1 involved the derivation of a preliminary candidate flare definition based on thematic analysis of views of 130 consumers in consultation with an expert consumer writer. In step 2, a workshop was conducted to incorporate perspectives of 19 LBP experts into the preliminary flare definition, which resulted in 2 alternative LBP flare definitions. Step 3 refined the definition using a 2-round Delphi consensus with 50 experts in musculoskeletal conditions. The definition favored by experts was further tested with 16 individuals with LBP in step 4, using the definition in three scenarios. This multiphase study produced a definition of LBP flare that distinguishes it from other LBP fluctuations, represents consumers views, involves expert consensus, and is understandable by consumers in clinical and research contexts: "A flare-up is a worsening of your condition that lasts from hours to weeks that is difficult to tolerate and generally impacts your usual activities and/or emotions." Perspective: A multiphase process, incorporating consumers views and expert consensus, produced a definition of LBP flare that distinguishes it from other LBP fluctuations. (C) 2019 by the American Pain Society
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- Friberg, Anders, et al.
(author)
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Cross-cultural aspects of perceptual features in K-pop : A pilot study comparing Chinese and Swedish listeners
- 2017
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In: 2017 ICMC/EMW - 43rd International Computer Music Conference and the 6th International Electronic Music Week. - : Shanghai Conservatory of Music. - 9780984527465 ; , s. 291-296
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Conference paper (peer-reviewed)abstract
- In previous studies it has been shown that perceptual features can be used as an intermediate representation in music processing to model higher-level semantic descriptions. In this pilot study, we focused on the cross-cultural aspect of such perceptual features, by asking both Chinese and Swedish listeners to rate a set of K-Pop samples using a web-based questionnaire. The music samples were selected from a larger set, previously rated in terms of different emotion labels. The selection procedure of the subset was carefully designed to maximize both the variation of emotion and genre. The listeners rated eight perceptual features: dissonance, speed, rhythmic complexity, rhythmic clarity, articulation, harmonic complexity, modality, and pitch. The results indicated a small but significant difference in the two groups, regarding the average speed and rhythmic complexity. In particular the perceived speed of hip hop was different for the two groups. We discuss the overall consistency of the ratings using this methodology in relation to the interface, selection and number of subjects.
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