31. |
- Lindgren, Anders, et al.
(författare)
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Networking in the land of northern lights : two years of experiences from DTN system deployments
- 2008
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Ingår i: Proceedings of the 2008 ACM workshop on Wireless networks and systems for developing regions. - New York : ACM Digital Library. - 9781605581903 ; , s. 1-8
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Konferensbidrag (refereegranskat)abstract
- The Sámi Network Connectivity (SNC) project was started to enable Internet connectivity for the Sámi population of reindeer herders in the Laponia region in northern Sweden. In this area, no infrastructure and thus, no Internet connectivity is normally available. Thus, DTN functionality is used to enable connectivity through the use of mobile relays. This paper describes deployments and field tests done within the SNC project and its continuation SNC+1, in which a Delay-Tolerant Networking system was deployed in the target region. During these deployments, the PRoPHET routing protocol, and three different applications were deployed and tested sucessfully.
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32. |
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Lysings urskog - inventering av mossor och lavar
- 1993
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Syftet med inventeringen har varit att upprätta en artlista över mossor och lavar i reservatet, kommentera intressanta fynd samt att bedöma områdets värde utifrån inventeringsresultat och försöka dra några slutsatser om områdets värde i framtiden som hemvist för hotade arter.
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33. |
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34. |
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35. |
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36. |
- Edebalk, Per Gunnar
(författare)
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Gustav Möller och sjukkassorna
- 2011
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Ingår i: Socionomen. - 0283-1929. ; :1, s. 44-51
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Tidskriftsartikel (refereegranskat)
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37. |
- Seisenbaeva, Gulaim, et al.
(författare)
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Mesoporous silica adsorbents modified with amino polycarboxylate ligands-functional characteristics, health and environmental effects
- 2021
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Ingår i: Journal of Hazardous Materials. - : Elsevier BV. - 0304-3894 .- 1873-3336. ; 406
-
Tidskriftsartikel (refereegranskat)abstract
- A series of hybrid adsorbents were produced by surface modification with amino polycarboxylate ligands of industrially available microparticles (MP) of Kromasil (R) mesoporous nanostructured silica beads, bearing grafted amino propyl ligands. Produced materials, bearing covalently bonded functions as EDTA and TTHA, original Kromasil (R), bearing amino propyl ligands, and bare particles, obtained by thermal treatment of Kromasil (R) in air, were characterized by SEM-EDS, AFM, FTIR, TGA and gas sorption techniques. Adsorption kinetics and capacity of surface-modified particles to adsorb Rare Earth Elements (REE), crucial for extraction in recycling processes, were evaluated under dynamic conditions, revealing specificity matching the ligand nature and the size of REE cations. A detailed comparison with earlier reported adsorbents for REE extraction was presented. The cytotoxicity was assessed using four different types of healthy cells, human skeletal muscles derived cells (SKMDC), fibroblast cells, macrophage cells (RAW264.7), and human umbilical vein endothelial cells (HUVECs), indicating lower toxicity of ligand-free MP than MP bearing amino poly-carboxylate functions. Internalization of the MP inside the cells and release of nitric oxide were observed. In addition, zebrafish embryos were exposed to high concentrations of MP and did not show any pronounced toxicity.
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38. |
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39. |
- Fjellström, Roger, 1945-
(författare)
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Varför har vi konstkritiker?
- 2004
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Ingår i: Västerbottens-Kuriren. - Umeå : Västerbottens-Kuriren AB. - 1104-0246. ; :2/6/04, Kultur
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Tidskriftsartikel (populärvet., debatt m.m.)
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40. |
- Huynh, Allan, 1977-, et al.
(författare)
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High-speed parallel data transmission utilizing a flex-rigid concept
- 2005
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Konferensbidrag (refereegranskat)abstract
- Transmission lines utilizing microstrips on a flex-foil with low dielectric loss (tanδ = 0.002) have been simulated to compare with the transmission lines laminated with a rigid part, a so-called flex-rigid structure. At high speeds, even solders, pads and connectors affect the signal integrity because of their parasitic effects. The flex-rigid structure does not require these extra parts, resulting in good signal integrity and thus high data transfer rates. Another advantage with a flexible cable is that dense parallel microstrips can easily be designed. Although many wired data communications utilize serial techniques like Serial AT Attachment (SATA), Universal Serial Bus (USB) and Firewire, the serial data link has its limitations when very high data speeds are required. With a parallel data transmission technique, the data transfer rate can be raised to a very high speed. However, a parallel data transmission technique has some disadvantages such as crosstalk and skew between the signals which must be considered.
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