| 1. |
- Åström, Fredrik, et al.
(författare)
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Foreword
- 2009
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Ingår i: Celebrating Scholarly Communication Studies: A Festschrift for Olle Persson at his 60th Birthday. ; 05-S June 2009, s. 5-7
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 2. |
- Carlson, K, et al.
(författare)
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MR imaging of multiple myeloma in tumour mass measurement at diagnosis and during treatment
- 1995
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Ingår i: Acta Radiologica. - 0284-1851 .- 1600-0455. ; 36:1, s. 9-14
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Tidskriftsartikel (refereegranskat)abstract
- The bone marrow of the spine, pelvis and proximal femora was examined with MR imaging at diagnosis in 30 cases of multiple myeloma (MM), and during treatment on 69 occasions. The MR pattern was normal, focal or diffuse and correlated to stage. A tumour mass index (TMI) was calculated by estimating the total myeloma mass visualised at MR imaging. The TMI correlated significantly with stage, lytic bone lesions, serum calcium, serum beta-2-microglobulin and survival. No abnormalities were seen at MR investigation in 4 of 6 patients classified as stage II because of osteoporosis only. Therapy efficacy evaluation with MR imaging corresponded to clinical evaluation on 54 of the 69 occasions. MR examination of bone marrow in MM patients can be used for tumour mass assessment, both at diagnosis and during follow-up. Valuable information can be obtained when the tumour mass is difficult to estimate using clinical criteria, e.g. in non-secretory MM or when osteoporosis is the only variable indicating an increase in the tumour mass.
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| 5. |
- Eklund, Patrik, 1958-, et al.
(författare)
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BPMN and its semantics for information management in emergency care
- 2009
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Ingår i: ICCIT '09. Fourth International Conference on Computer Sciences and Convergence Information Technology, 2009. - : IEEE Computer Society. - 9780769538969 - 9781424452446 ; , s. 273-278
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Konferensbidrag (refereegranskat)abstract
- Emergency and crisis response such as appearing in large traffic accident management involves coordination of emergency and rescue services and police. The management of information is a complex task where decision support on site and distance management requires a well-founded understanding of the underlying processes. The Business Process Modeling Notation (BPMN) is used for encoding processes related to emergency medical services. BPMN is basically a syntax where the semantic part is left to be specified by the applications. Our approach to semantics is drawn from categorical approaches to representing signatures and generalized terms. In particular, monads over Set, the category of sets, composed with the term monad (over Set) turn out to be useful for modeling uncertainties both with respect to representation of observations as well as time. BPMN Flow Objects, Connecting Objects as well as Artifacts are represented as suitable morphisms in the underlying categories enabled by the monadic instrumentation.
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| 6. |
- Vallot, Dorothée, et al.
(författare)
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Effects of undercutting and sliding on calving : a global approach applied to Kronebreen, Svalbard
- 2018
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Ingår i: The Cryosphere. - : Copernicus GmbH. - 1994-0416 .- 1994-0424. ; 12, s. 609-625
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, we study the effects of basal friction, sub-aqueous undercutting and glacier geometry on the calving process by combining six different models in an offline-coupled workflow: a continuum-mechanical ice flow model (Elmer/Ice), a climatic mass balance model, a simple sub-glacial hydrology model, a plume model, an undercutting model and a discrete particle model to investigate fracture dynamics (Helsinki Discrete Element Model, HiDEM). We demonstrate the feasibility of reproducing the observed calving retreat at the front of Kronebreen, a tidewater glacier in Svalbard, during a melt season by using the output from the first five models as input to HiDEM. Basal sliding and glacier motion are addressed using Elmer/Ice, while calving is modelled by HiDEM. A hydrology model calculates subglacial drainage paths and indicates two main outlets with different discharges. Depending on the discharge, the plume model computes frontal melt rates, which are iteratively projected to the actual front of the glacier at subglacial discharge locations. This produces undercutting of different sizes, as melt is concentrated close to the surface for high discharge and is more diffuse for low discharge. By testing different configurations, we show that undercutting plays a key role in glacier retreat and is necessary to reproduce observed retreat in the vicinity of the discharge locations during the melting season. Calving rates are also influenced by basal friction, through its effects on near-terminus strain rates and ice velocity.
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| 7. |
- Vickhoff, Björn, 1946, et al.
(författare)
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Music structure determines heart rate variability of singers
- 2013
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Ingår i: Frontiers in Psychology. - : Frontiers Media SA. - 1664-1078. ; 4
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Tidskriftsartikel (refereegranskat)abstract
- Choir singing is known to promote wellbeing. One reason for this may be that singing demands a slower than normal respiration, which may in turn affect heart activity. Coupling of heart rate variability (HRV) to respiration is called Respiratory sinus arrhythmia (RSA). This coupling has a subjective as well as a biologically soothing effect, and it is beneficial for cardiovascular function. RSA is seen to be more marked during slow-paced breathing and at lower respiration rates (0.1 Hz and below). In this study, we investigate how singing, which is a form of guided breathing, affects HRV and RSA. The study comprises a group of healthy 18 year olds of mixed gender. The subjects are asked to; (1) hum a single tone and breathe whenever they need to; (2) sing a hymn with free, unguided breathing; and (3) sing a slow mantra and breathe solely between phrases. Heart rate (HR) is measured continuously during the study. The study design makes it possible to compare above three levels of song structure. In a separate case study, we examine five individuals performing singing tasks (1–3). We collect data with more advanced equipment, simultaneously recording HR, respiration, skin conductance and finger temperature. We show how song structure, respiration and HR are connected. Unison singing of regular song structures makes the hearts of the singers accelerate and decelerate simultaneously. Implications concerning the effect on wellbeing and health are discussed as well as the question how this inner entrainment may affect perception and behavior.
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| 8. |
- Vickhoff, Björn, 1946, et al.
(författare)
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Musical Piloerection
- 2012
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Ingår i: Music and Medicine. - : International Association for Music and Medicine. - 1943-8621 .- 1943-863X. ; 4:2, s. 82-89
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Tidskriftsartikel (refereegranskat)abstract
- Piloerection (from the Latin pilus for hair) is a skin response which can be observed at many occasions among various species as a reaction to fear, aggression, or coldness. It is also a human response to music and in these cases a highly pleasurable one. Not everyone experiences it, and it is particularly difficult to evoke the reaction in experimental settings. We accidentally happened to catch a spontaneous distinct reaction with finger temperature, skin conductance, heart rate, and respiration. This allows us to study how these emotion correlates online with the music—the dynamics of the event. From this and recent articles, we discuss suggestions of how music causes piloerection.
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