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- Achterberg, A., et al.
(författare)
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The search for muon neutrinos from northern hemisphere gamma-ray bursts with AMANDA
- 2008
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Ingår i: Astrophysical Journal. - : American Astronomical Society. - 0004-637X .- 1538-4357. ; 674:1, s. 357-370
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Tidskriftsartikel (refereegranskat)abstract
- We present the results of the analysis of neutrino observations by the Antarctic Muon and Neutrino Detector Array (AMANDA) correlated with photon observations of more than 400 gamma-ray bursts (GRBs) in the northern hemisphere from 1997 to 2003. During this time period, AMANDA's effective collection area for muon neutrinos was larger than that of any other existing detector. After the application of various selection criteria to our data, we expect similar to 1 neutrino event and <2 background events. Based on our observations of zero events during and immediately prior to the GRBs in the data set, we set the most stringent upper limit on muon neutrino emission correlated with GRBs. Assuming a Waxman-Bahcall spectrum and incorporating all systematic uncertainties, our flux upper limit has a normalization at 1 PeV of E-2 Phi(nu) <= 6.3 x 10(-9) GeV cm(-2) s(-1) sr(-1), with 90% of the events expected within the energy range of similar to 10 TeV to similar to 3 PeV. The impact of this limit on several theoretical models of GRBs is discussed, as well as the future potential for detection of GRBs by next-generation neutrino telescopes. Finally, we briefly describe several modifications to this analysis in order to apply it to other types of transient point sources.
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| 6. |
- Falk, AC, et al.
(författare)
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Management and classification of children with head injury
- 2005
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Ingår i: Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery. - : Springer Science and Business Media LLC. - 0256-7040. ; 21:6, s. 430-436
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Tidskriftsartikel (refereegranskat)
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| 7. |
- Falk, AC, et al.
(författare)
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The specificity of post-concussive symptoms in the pediatric population
- 2009
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Ingår i: Journal of child health care : for professionals working with children in the hospital and community. - : SAGE Publications. - 1741-2889. ; 13:3, s. 227-238
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Tidskriftsartikel (refereegranskat)abstract
- The study compared patterns of reported symptoms between a mild head injury group and a group of children with abdominal complaints visiting an emergency department. Children (0—15 years) admitted to an emergency department during a three-month period with a history of head injury and a comparison group of children were included. Medical records at the time of injury were reviewed and follow-up questionnaires focused on presumed symptoms related to concussion at three months post-visit. The comparison group reported significantly more change in behaviour than the head injury group. However, for the older children, higher intensity of symptoms was reported by the comparison group compared to the head injury group. Initial differences in the amount and presence of symptoms between the two groups did not reflect the findings at three months; both groups reported symptoms or changes at three months after the event. Evaluating children aged under five, their symptoms and recovery patterns after a head injury is recommended.
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| 10. |
- Van't Hooft, I, et al.
(författare)
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Beneficial effect from a cognitive training programme on children with acquired brain injuries demonstrated in a controlled study
- 2005
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Ingår i: Brain Injury. - : Informa UK Limited. - 1362-301X .- 0269-9052. ; 19:7, s. 511-518
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Tidskriftsartikel (refereegranskat)abstract
- Primary objective: To test the effectiveness of a cognitive training programme in children and adolescents with attention and memory deficits after acquired brain injury (ABI). Research design: Randomized controlled study. Participants: Thirty-eight children with ABI, 9 - 16 years of age. Methods and procedures: The treatment group trained with the cognitive programme for 30 minutes per day interactively with a teacher or parent for a period of 17 weeks. Children in the control group had a freely chosen interactive activity 30 minutes daily for 17 weeks. Pre- and post-training assessments were made using a neuropsychological test battery. Main outcome and results: Significant improvements in the majority of neuropsychological tests of sustained and selective attention as well as in memory performance were shown in the treatment group as compared to controls. Conclusions: The immediate effect of the training programme improved complex attention and memory functions, indicating that this method may be a valuable treatment option for improving cognitive efficiency in children after ABI. On the basis of these results, the next step will be to evaluate long-term effects and further ecological validity.
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