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- Gunnarsson, Fredrik, et al.
(författare)
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Particle filtering for network-based positioning terrestrial radio networks
- 2014
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Ingår i: Data Fusion & Target Tracking 2014: Algorithms and Applications (DF&TT 2014), IET Conference on. - : Institution of Engineering and Technology. - 9781849198639
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Konferensbidrag (refereegranskat)abstract
- There is strong interest in positioing in wireless networks, partly to support end user service needs, but also to support network management with network-based network information. The focus in this paper is on the latter, while using measurements that are readily available in wireless networks. We show how thesignal direction of departure and inter-distance between the base station and the mobile terminal can be estimated, and how particle filters and smoothers can be used to post-process the measurements. The methods are evaluated in a live 3GPP LTE network with promising results inlcuding position error medians of less than 100 m.
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- Koons, D. N., et al.
(författare)
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Drivers of waterfowl population dynamics : from teal to swans
- 2014
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Ingår i: Wildfowl. - 0954-6324 .- 2052-6458. ; :Special Issue 4, s. 169-191
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Tidskriftsartikel (refereegranskat)abstract
- Waterfowl are among the best studied and most extensively monitored species in the world. Given their global importance for sport and subsistence hunting, viewing and ecosystem functioning, great effort has been devoted since the middle part of the 20th century to understanding both the environmental and demographic mechanisms that influence waterfowl population and community dynamics. Here we use comparative approaches to summarise and contrast our understanding of waterfowl population dynamics across species as short-lived as the teal Anas discors and A. crecca to those such as the swans Cygnus sp. which have long life-spans. Specifically, we focuson population responses to vital rate perturbations across life history strategies, discuss bottom-up and top-down responses of waterfowl populations to global change, and summarise our current understanding of density dependence across waterfowl species. We close by identifying research needs and highlight ways to overcome the challenges of sustainably managing waterfowl populations in the 21st century.
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| 8. |
- Koons, D. N., et al.
(författare)
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Drivers of waterfowl population dynamics : from teal to swans
- 2014
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Ingår i: Wildfowl. - : Wildfowl and Wetlands Trust. - 0954-6324. ; :Special Issue 4, s. 169-191
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Tidskriftsartikel (refereegranskat)abstract
- Waterfowl are among the best studied and most extensively monitored species in the world. Given their global importance for sport and subsistence hunting, viewing and ecosystem functioning, great effort has been devoted since the middle part of the 20th century to understanding both the environmental and demographic mechanisms that influence waterfowl population and community dynamics. Here we use comparative approaches to summarise and contrast our understanding of waterfowl population dynamics across species as short-lived as the teal Anas discors and A. crecca to those such as the swans Cygnus sp. which have long life-spans. Specifically, we focuson population responses to vital rate perturbations across life history strategies, discuss bottom-up and top-down responses of waterfowl populations to global change, and summarise our current understanding of density dependence across waterfowl species. We close by identifying research needs and highlight ways to overcome the challenges of sustainably managing waterfowl populations in the 21st century.
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