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- Olsson, Anders, et al.
(author)
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Undervattensvegetation i Vättern
- 2004
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Reports (other academic/artistic)abstract
- Vättern är på förslag från dess Länsstyrelser att Natura 2000-klassas som naturtyp 3130 (Oligo-mesotrofa sjöar med strandpryl, braxengräs eller annuell vegetation på exponerade ställen). Dessutom finns det utbredda kransalgsbälten i Vättern som lokalt skulle kunnamotivera en klassning som naturtyp 3140 (Kalkrika mesotrofa vatten med bentiska kransalger).På uppdrag av Länsstyrelsen i Jönköping inventerades submersa makrofyter och kransalger i fem lokaler i mellersta och norra Vättern i syfte att:1) Basinventera förekommande arters utbredning och täckningsgrad, med tyngdpunkt på djuputbredning av typiska arter för föreslagna naturtyper;2) Bedömma vilken/vilka naturtyper de olika lokalerna skall klassas som;3) Ge grund för diskussion om lämplig målnivå för gynnsam bevarandestatus;4) Utarbeta, fälttesta, utvärdera och anpassa lämplig inventeringsmetodik för att producera en fältmanual;5) Kunna jämföras, kvalitets- och kostnadsmässigt, med 2003 års inventering utförd med annan metod.Totalt inventerades fem lokaler under juli 2004, vilka visade sig ha en stor spridning avseende naturvärde. Under inventeringen hittades totalt 15 arter, varav fem kransalger(samtliga typarter för Natura 2000) och sex isoetider(varav fem typarter). Inga rödlistade arter hittades, dock hittades den i Sverige sällsynta sträfsen Chara aspera f. subinermis utanför Vadstena.Undersökningen föreslår Vättern som representativ för naturtyperna 3130 samt 3140, där Vadstenaviken, Norrviken (vid Stora Forsa) samt Sidöns insida (Kråksviken, Karlsborg)bedöms vara lokaler med gynnsam bevarande status.
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| 2. |
- Bäckström, Christer
(author)
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Some Fixed Parameter Tractability Results for Planning with Non-Acyclic Domain-Transition Graphs
- 2015
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In: Twenty-Ninth AAAI Conference on Artificial Intelligence (AAAI-2015). - : AAAI Press. - 9781577356981
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Conference paper (peer-reviewed)abstract
- Bäckström studied the parameterised complexity of planning when the domain-transition graphs (DTGs) are acyclic. He used the parameters d (domain size), k (number of paths in the DTGs) and w (treewidth of the causal graph), and showed that planning is fixed-parameter tractable (fpt) in these parameters, and fpt in only parameter k if the causal graph is a polytree. We continue this work by considering some additional cases of non-acyclic DTGs. In particular, we consider the case where each strongly connected component (SCC) in a DTG must be a simple cycle, and we show that planning is fpt for this case if the causal graph is a polytree. This is done by first preprocessing the instance to construct an equivalent abstraction and then apply B¨ackstr¨oms technique to this abstraction. We use the parameters d and k, reinterpreting this as the number of paths in the condensation of a DTG, and the two new parameters c (the number of contracted cycles along a path) and pmax (an upper bound for walking around cycles, when not unbounded).
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| 3. |
- Constantinescu, O
(author)
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Peronospora on Acaena (Rosaceae)
- 1996
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In: MYCOTAXON. - : MYCOTAXON LTD. - 0093-4666. ; 58, s. 313-318
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Journal article (other academic/artistic)abstract
- Following the examination of additional specimens, the rare Peronospora parasitic on Acaena is described, illustrated, and ascribed to Peronospora sparsa.
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| 7. |
- Laustsen, Christoffer, et al.
(author)
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High altitude may alter oxygen availability and renal metabolism in diabetics as measured by hyperpolarized [1-C-13]pyruvate magnetic resonance imaging
- 2014
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In: Kidney International. - : Elsevier BV. - 0085-2538 .- 1523-1755. ; 86:1, s. 67-74
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Journal article (peer-reviewed)abstract
- The kidneys account for about 10% of the whole body oxygen consumption, whereas only 0.5% of the total body mass. It is known that intrarenal hypoxia is present in several diseases associated with development of kidney disease, including diabetes, and when renal blood flow is unaffected. The importance of deranged oxygen metabolism is further supported by deterioration of kidney function in patients with diabetes living at high altitude. Thus, we argue that reduced oxygen availability alters renal energy metabolism. Here, we introduce a novel magnetic resonance imaging (MRI) approach to monitor metabolic changes associated with diabetes and oxygen availability. Streptozotocin diabetic and control rats were given reduced, normal, or increased inspired oxygen in order to alter tissue oxygenation. The effects on kidney oxygen metabolism were studied using hyperpolarized [1-C-13]pyruvate MRI. Reduced inspired oxygen did not alter renal metabolism in the control group. Reduced oxygen availability in the diabetic kidney altered energy metabolism by increasing lactate and alanine formation by 23% and 34%, respectively, whereas the bicarbonate flux was unchanged. Thus, the increased prevalence and severity of nephropathy in patients with diabetes at high altitudes may originate from the increased sensitivity toward inspired oxygen. This increased lactate production shifts the metabolic routs toward hypoxic pathways.
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| 9. |
- Martínez, José L., et al.
(author)
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Predicting antibiotic resistance
- 2007
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In: Nature Reviews Microbiology. - : Springer Science and Business Media LLC. - 1740-1526 .- 1740-1534. ; 5:12, s. 958-965
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Research review (peer-reviewed)abstract
- The treatment of bacterial infections is increasingly complicated because microorganisms can develop resistance to antimicrobial agents. This article discusses the information that is required to predict when antibiotic resistance is likely to emerge in a bacterial population. Indeed, the development of the conceptual and methodological tools required for this type of prediction represents an important goal for microbiological research. To this end, we propose the establishment of methodological guidelines that will allow researchers to predict the emergence of resistance to a new antibiotic before its clinical introduction.
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| 10. |
- Mellegård, Niklas, et al.
(author)
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The Day 1 C-ITS Application Green Light Optimal Speed Advisory—A Mapping Study
- 2020
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In: Transportation Research Procedia. - : Elsevier BV. - 2352-1465. ; 49, s. 170-182
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Journal article (peer-reviewed)abstract
- This article reports article reports on a mapping study to investigate the C-ROADS Day 1 C-ITS application Green Light Optimal Speed Advisory (GLOSA). In the study, 64 publications between 2006 and 2019 where reviewed and classified according to a schema developed using thematic analysis of the selected publications. Among the findings were that the typical publication evaluates through simulation benefits for the equipped vehicle, leaving considerable gaps in investigations of societal effects. Additionally, there is a lack of investigation on driver behaviour, both for the equipped vehicle and for fellow road users—the ability to accurately model such behaviour is necessary for reliable simulation results.
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