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- Feroci, M., et al.
(författare)
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The large observatory for x-ray timing
- 2014
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Ingår i: Proceedings of SPIE - The International Society for Optical Engineering. - : SPIE. - 9780819496126
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Konferensbidrag (refereegranskat)abstract
- The Large Observatory For x-ray Timing (LOFT) was studied within ESA M3 Cosmic Vision framework and participated in the final downselection for a launch slot in 2022-2024. Thanks to the unprecedented combination of effective area and spectral resolution of its main instrument, LOFT will study the behaviour of matter under extreme conditions, such as the strong gravitational field in the innermost regions of accretion flows close to black holes and neutron stars, and the supranuclear densities in the interior of neutron stars. The science payload is based on a Large Area Detector (LAD, 10 m2 effective area, 2-30 keV, 240 eV spectral resolution, 1° collimated field of view) and a Wide Field Monitor (WFM, 2-50 keV, 4 steradian field of view, 1 arcmin source location accuracy, 300 eV spectral resolution). The WFM is equipped with an on-board system for bright events (e.g. GRB) localization. The trigger time and position of these events are broadcast to the ground within 30 s from discovery. In this paper we present the status of the mission at the end of its Phase A study.
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| 2. |
- Feroci, M., et al.
(författare)
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LOFT - The large observatory for x-ray timing
- 2012
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Ingår i: Proceedings of SPIE - The International Society for Optical Engineering. - : SPIE - International Society for Optical Engineering. - 9780819491442 ; , s. 84432D-
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Konferensbidrag (refereegranskat)abstract
- The LOFT mission concept is one of four candidates selected by ESA for the M3 launch opportunity as Medium Size missions of the Cosmic Vision programme. The launch window is currently planned for between 2022 and 2024. LOFT is designed to exploit the diagnostics of rapid X-ray flux and spectral variability that directly probe the motion of matter down to distances very close to black holes and neutron stars, as well as the physical state of ultradense matter. These primary science goals will be addressed by a payload composed of a Large Area Detector (LAD) and a Wide Field Monitor (WFM). The LAD is a collimated (<1 degree field of view) experiment operating in the energy range 2-50 keV, with a 10 m2 peak effective area and an energy resolution of 260 eV at 6 keV. The WFM will operate in the same energy range as the LAD, enabling simultaneous monitoring of a few-steradian wide field of view, with an angular resolution of <5 arcmin. The LAD and WFM experiments will allow us to investigate variability from submillisecond QPO's to yearlong transient outbursts. In this paper we report the current status of the project.
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| 7. |
- Jensen, I-B, et al.
(författare)
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The AHA-study: Implementing evidence based measueres for retaining workability at work sites : Effects on lifestyle, workability and firm productivity. 9th International Congress of Behavioral Medicine. Bangkok, Thailand, Nov 29-Dec 2, 2006
- 2006
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Jensen IB, Bergstrom G, Bjorklund C, Fried I, Lisspers J, Nathell L, Hermansson U, Roos P, Bodin L, the AHAstudy group (2006). The AHA-study: Implementing evidence based measueres for retaining workability at work sites - Effcets on lifestyle, workability and firm productivity. Presented at the 9th International Congress of Behavioral Medicine. Bangkok, Thailand, Nov 29-Dec 2, 2006.
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| 8. |
- Arnrup, K, et al.
(författare)
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Classification of dental behavior management problems among children.
- 2007
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Ingår i: Poster presentation at the 85th General Session & Exhibition of the IADR, New Orleans, LA, USA, March 21-24, 2007..
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Objectives: This study aimed to further investigate the heterogeneity within the group of children referred for specialist treatment because of dental behavior management problems (DBMP). A specific aim was to evaluate the validity of a previously reported cluster structure in another DBMP study group. Methods: 177 child dental patients, aged 4 to 12 at referral to a specialist pediatric dental clinic in Göteborg, Sweden, were classified into subgroups according to their personal characteristics. Cluster structure was described and compared to previously reported findings in a DBMP study group of same-aged child dental patients in Örebro, Sweden (n=74). Parental assessments of children's dental and general fear, temperament and behavior were made pre-treatment. The children also performed a vocabulary test. Data were analyzed mainly with a person-based approach using sequences of cluster analyses. Results: Classification into five different subgroups was judged the best representation of the Göteborg study group data, while four groups had been defined in Örebro. The new clusters partly paralleled the previous and were labeled (I) Extrovert, outgoing, (II) Highly fearful, multiple problems, (III) Highly fearful, (IV) Moderately fearful, externalizing, impulsive and (V) Moderately fearful, inhibited. Cluster profile II describes severe dental fear and general temperamental and behavioral problems of internalizing as well as externalizing character. Such combined problems were not clearly revealed in the Örebro cluster structure. Conclusion: The contention that children with dental behavior management problems (DBMP) comprise a heterogeneous group was strengthened. Similar, although not identical, clusters of children showing DBMP were identified in this replication study. Apart from different levels of dental fear, varying temperamental and behavioral characteristics need to be taken into consideration to better match treatment for these patients
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