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| 2. |
- Wang, Zhao, et al.
(författare)
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Secrecy degrees of freedom of the 2 interference channel with delayed CSIT
- 2014
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Ingår i: IEEE Wireless Communications Letters. - 2162-2337 .- 2162-2345. ; 3:4, s. 341-344
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Tidskriftsartikel (refereegranskat)abstract
- We consider the two-hop interference channel with confidential messages (ICC), where each transmitter sends one confidential message to its intended destination through two trusted relays. We study the secrecy degrees of freedom (SDoF) of the considered 2 ?2 ?2 ICC with delayed channel state information at transmitters (CSIT). We settle the optimal SDoF of the considered network to be (1/2, 1/2). Thus, the considered network has a strictly larger sum SDoF than a two-user one-hop ICC with even full CSIT. Moreover, we study the SDoF of the network with limited Shannon feedback, that only one relay can obtain the delayed CSIT and output feedback from the destinations. The optimal SDoF is also shown to be (1/2, 1/2), revealing that only limited feedback can also bring SDoF gain. Our proposed achievable schemes in both cases are integrated forms of the retrospective interference alignment and artificial noise transmission.
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| 3. |
- Ingebrigtsen, T, et al.
(författare)
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The clinical value of serum S-100 protein measurements in minor head injury: a Scandinavian multicentre study
- 2000
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Ingår i: Brain Injury. - : Informa UK Limited. - 1362-301X .- 0269-9052. ; 14:12, s. 1047-1055
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Tidskriftsartikel (refereegranskat)abstract
- PURPOSE: This study of patients with minor head injury was designed to investigate the relation of S-100 protein measurements to computed tomograpy (CT) findings and patients outcomes. Increased serum levels of this protein were hypothetized to predict intracranial pathology and increased frequency of post-concussion symptoms. METHODS: One hundred and eighty-two patients were studied with Glasgow Coma Scale scores of 13-15. The study recruited patients from three Scandinavian neurotrauma centres. Serum levels of S-100 protein were measured at admittance and CT scans of the brain were obtained within 24 hours postinjury in all patients. Outcome was evaluated with the Rivermead Postconcussion Symptoms Questionnaire (RPQ) 3 months after the injury. RESULTS: Increased serum level of S-100 protein was detected in 69 (38%) patients, and CT scan demonstrated intracranial pathology in 10 (5%) (brain contusion in seven, epidural haematoma in two, traumatic subarachnoid haemorrhage in one). The proportion of patients with detectable serum level was significantly (p < 0.01) higher among those with intracranial pathology (90%) compared to those without (35%). The negative predictive value of an undetectable S-100 level was 0.99. Sixty-two per cent reported one or more post-concussion symptoms at follow-up. A trend was observed towards an increased frequency of post-concussion symptoms among patients with detectable serum levels. CONCLUSIONS: Undetectable serum level of S-100 protein predicts normal intracranial findings on CT scan. Determination of S-100 protein in serum may be used to select patients for CT scanning. Increased S-100 serum levels may be more related to post-concussion symptoms caused by mild traumatic brain injury than to symptoms of psychological origin.
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| 5. |
- Larsson, Per, et al.
(författare)
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Ecology, evolution, and management strategies of northern pike populations in the Baltic Sea
- 2015
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Ingår i: Ambio. - : Springer Science and Business Media LLC. - 0044-7447 .- 1654-7209. ; 44:Supplement 3, s. S451-S461
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Forskningsöversikt (refereegranskat)abstract
- Baltic Sea populations of the northern pike (Esox lucius) have declined since the 1990s, and they face additional challenges due to ongoing climate change. Pike in the Baltic Sea spawn either in coastal bays or in freshwater streams and wetlands. Pike recruited in freshwater have been found to make up about 50 % of coastal pike stocks and to show natal homing, thus limiting gene flow among closely located spawning sites. Due to natal homing, sub-populations appear to be locally adapted to their freshwater recruitment environments. Management actions should therefore not involve mixing of individuals originating from different sub-populations. We offer two suggestions complying with this advice: (i) productivity of extant freshwater spawning populations can be boosted by modifying wetlands such that they promote spawning and recruitment; and (ii) new sub-populations that spawn in brackish water can potentially be created by transferring fry and imprinting them on seemingly suitable spawning environments.
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| 6. |
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Åtgärdsprogramför bevarande av blåtryffel : (Chamonixa caespitosa)
- 2005
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Blåtryffel (Chamonixia caespitosa) är en underjordiskt växande, ca 1–2 x 3–5cm stor, vit till gulvit tryffelsvamp med kort fot. Arten känns lätt igen på attden vita fruktkroppen blånar mycket snabbt då den friläggs. Svampen saknarspeciell lukt.Blåtryffel är upptagen som starkt hotad (EN) på den svenska rödlistan.Arten är funnen på knappt 20 platser i Sverige. Huvuddelen av fynden ärgjorda i äldre barrskogar med rörligt markvatten, ofta i nordsluttningar ellerbäckraviner och med ett stort inslag av död ved. Växtplatserna hyser ofta flera andra sällsynta eller hotade växtarter. På grund av sitt underjordiska växtsätt är dock blåtryffel svårfunnen och fler lokaler kan finnas.Blåtryffel hotas framför allt av skogsavverkningar och ändrade hydrologiska förhållanden. Åtgärdsprogrammet syftar till att öka kunskapen om blåtryffelns förekomst och krav i Sverige. I ett längre tidsperspektiv är målsättningen att blåtryffel skall förekomma på tillräckligt antal lokaler för ett långsiktigt bevarande.Nödvändiga åtgärder för att nå målen är inventering av tidigare kändaväxtlokaler för att avgöra status för arten och dess livsmiljö. Arten bör äveneftersökas systematiskt på potentiella lokaler, särskilt i närheten av de områden där den påträffats tidigare. Den kunskap som därigenom samlas in omartens biologi, livsmiljö och status bör sammanställas och analyseras. Därefter kan nödvändiga åtgärder för att säkerställa artens långsiktiga överlevnad iSverige fastställas och behovet av skyddsåtgärder bedömas. För områden därarten konstateras förekomma eller bedöms finnas bör nödvändigt områdesskydd inrättas. I de fall arten påträffas inom skyddade områden börskyddsföreskrifterna ses över och vid behov justeras utifrån blåtryffelns krav.Berörda markägare och myndigheter bör informeras om arten. Åtgärdsprogrammet för bevarande av blåtryffel är vägledande för berördamyndigheters och andra aktörers samordnade insatser för artens bevarandeunder åren 2004–2007. Därefter skall vidtagna åtgärder följas upp, resultatetutvärderas och programmet omprövas.
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| 7. |
- Backlander, Gisela, et al.
(författare)
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Development and Validation of a Multi-Dimensional Measure of Activity-Based Working Behaviors
- 2021
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Ingår i: Frontiers in Psychology. - : Frontiers Media SA. - 1664-1078. ; 12
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Tidskriftsartikel (refereegranskat)abstract
- Most work on activity-based working centers on the physical environment and digital technologies enabling flexible working. While important, we believe the key components for implementing activity-based working are employee and manager behaviors. To measure the degree of enactment of activity-based work, based on workshops with experienced practitioners as well as previous literature, we have developed and validated a behavior-focused measure of activity-based working behaviors. In our initial sample (Sample 1, N = 234), three subscales were identified: task - environment crafting, workday planning, and social needs prioritization. In the replication sample (Sample 2, N = 434), this model also showed adequate fit. Moreover, task - environment crafting was related to general health and lower stress in sample 1 (multi-organization sample), but not in the single-organization sample (sample 2). Workday planning was associated with higher concentration in both samples and in the second sample with general health and work engagement; the latter was also related to social needs prioritization.
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| 8. |
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| 9. |
- Lundwall, Åke, et al.
(författare)
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A novel gene family encoding proteins with highly differing structure because of a rapidly evolving exon
- 1995
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Ingår i: FEBS Letters. - 1873-3468. ; 374:1, s. 6-53
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Tidskriftsartikel (refereegranskat)abstract
- Despite vast differences in primary structure, it is here shown that several predominant semen proteins are encoded by genes that belongs to a common family. Members have their transcription unit split into three exons: the first encoding the signal peptide, the second the secreted protein, while the third exon solely consists of 3' non-translated nucleotides. The first and the third exon are conserved between members, but the second exon is not. The genes for human semenogelins I and II, rat SVSII, SVSIV, SVSV and guinea pig GP1 and GP2 belong to this gene family.
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| 10. |
- Kullander, Klas, et al.
(författare)
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Role of EphA4 and EphrinB3 in local neuronal circuits that control walking
- 2003
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Ingår i: Science. - : American Association for the Advancement of Science (AAAS). - 0036-8075 .- 1095-9203. ; 299:5614, s. 1889-1892
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Tidskriftsartikel (refereegranskat)abstract
- Local circuits in the spinal cord that generate locomotion are termed central pattern generators (CPGs). These provide coordinated bilateral control over the normal limb alternation that underlies walking. The molecules that organize the mammalian CPG are unknown. Isolated spinal cords from mice lacking either the EphA4 receptor or its ligand ephrinB3 have lost left-right limb alternation and instead exhibit synchrony. We identified EphA4-positive neurons as an excitatory component of the locomotor CPG. Our study shows that dramatic locomotor changes can occur as a consequence of local genetic rewiring and identifies genes required for the development of normal locomotor behavior.
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