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| 2. |
- Ahlbeck Bergendahl, Ida, et al.
(författare)
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Fisk- och skaldjursbestånd i hav och sötvatten 2017 : Resursöversikt
- 2017
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- I rapporten kan du ta del av bedömningen som görs av situationen för bestånd som regleras inom ramen för EU:s gemensamma fiskeripolitik (GFP). Bedömningarna baseras på det forskningssamarbete och den rådgivning som sker inom det Internationella Havsforskningsrådet (ICES).De bestånd som förvaltas nationellt baseras på de biologiska underlagen, och rådgivningen i huvudsak på den forskning och övervakning samt analys som bedrivs av Institutionen för akvatiska resurser vid Sveriges lantbruksuniversitet (SLU Aqua) samt yrkesfiskets rapportering.Rapporten omfattar 41 fiskarter och sju skaldjursarter.Nytt för i år är att vi även beskriver fritidsfisket mer utförligt. Det fisket får allt större betydelse för utvecklingen av många av Sveriges bestånd av fisk- och skaldjur, till exempel sötvattens- och kustlevande arter som abborre, gädda, gös, lax, röding och öring, liksom marina arter som torsk och hummerÖversikten är utarbetad av SLU Aqua på uppdrag av Havs- och vattenmyndigheten.
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| 3. |
- Amiandamhen, Stephen, 1983-, et al.
(författare)
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Recycling sawmilling wood chips, biomass combustion residues, and tyre fibres into cement-bonded composites : Properties of composites and life cycle analysis
- 2021
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Ingår i: Construction and Building Materials. - : Elsevier Ltd. - 0950-0618 .- 1879-0526. ; 297
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Tidskriftsartikel (refereegranskat)abstract
- This study investigated the properties and sustainability of cement-bonded composites containing industrial residues such as wood chips, tyre fibres and biomass combustion residues, i.e. bottom ash (BA) and fly ash (FA). The effect of cement-to-raw material (wood/tyre fibre) ratio (C/RM) and the aggregate content (BA and FA) on thermal and mechanical properties of the composites were investigated. Scanning electron microscopy (SEM) and life cycle analysis (LCA) were also conducted. The results revealed that as the aggregate content increased in wood composites, the mechanical properties also increased. The mean thermal conductivity and volumetric heat capacity of tyre composite samples were 0.37 W/mK and 1.2 MJ/m3K respectively, while the respective values for wood composite samples were 0.29 W/mK and 0.81 MJ/m3K. SEM analysis showed adequate bonding between wood/tyre fibres and cement matrix. LCA revealed that the materials share of the total primary energy use was about 60% for all analysed composites. © 2021 The Author(s)
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- Crocetti, Roberto, et al.
(författare)
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Multiple shear plane connections with timber based gusset plates
- 2021
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Ingår i: World Conference on Timber Engineering 2021, WCTE 2021. - : World Conference on Timber Engineering (WCTE).
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Konferensbidrag (refereegranskat)abstract
- This paper presents the results of an experimental study conducted on multiple-shear joints consisting of gusset plates made of either LVL or plywood connected to the timber members by means of full-threaded self-tapping screw. Both hardwood and softwood timber based gusset plates with different thickness and face grain orientations were investigated. The results show that this type of connection has an excellent structural performance, with not very dissimilar strength from that of comparable connections which makes use of slotted-in steel plates and dowels. It is believed, therefore, that the proposed solution can be a valid alternative to the more traditional timber connection with slotted-in steel plates and dowels.
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- Ekberg, Joakim, 1976-, et al.
(författare)
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Design of an online health-promoting community : Negotiating user community needs with public health goals and service capabilities
- 2013
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Ingår i: BMC Health Services Research. - : BioMed Central. - 1472-6963. ; 13:1
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Tidskriftsartikel (refereegranskat)abstract
- Background: An online health-promoting community (OHPC) has the potential to promote health and advance new means of dialogue between public health representatives and the general public. The aim of this study was to examine what aspects of an OHPC that are critical for satisfying the needs of the user community and public health goals and service capabilities.Methods: Community-based participatory research methods were used for data collection and analysis, and participatory design principles to develop a case study OHPC for adolescents. Qualitative data from adolescents on health appraisals and perspectives on health information were collected in a Swedish health service region and classified into categories of user health information exchange needs. A composite design rationale for the OHPC was completed by linking the identified user needs, user-derived requirements, and technical and organizational systems solutions. Conflicts between end-user requirements and organizational goals and resources were identified.Results: The most prominent health information needs were associated to food, exercise, and well-being. The assessment of the design rationale document and prototype in light of the regional public health goals and service capabilities showed that compromises were needed to resolve conflicts involving the management of organizational resources and responsibilities. The users wanted to discuss health issues with health experts having little time to set aside to the OHPC and it was unclear who should set the norms for the online discussions.Conclusions: OHPCs can be designed to satisfy both the needs of user communities and public health goals and service capabilities. Compromises are needed to resolve conflicts between users' needs to discuss health issues with domain experts and the management of resources and responsibilities in public health organizations.
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| 7. |
- Fredriksson, Karolina, et al.
(författare)
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Klassrumsdialog i matematikundervisningen : matematiska samtal i helklass i grundskolan
- 2017
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Denna systematiska översikt ger en bild av vad forskningen sammantaget säger om hur lärare kan leda samtal i helklass för att få elever att delta i gemensamma matematiska resonemang. Det handlar om diskussioner i vilka eleverna använder och analyserar matematiska begrepp och argumenterar matematiskt. Detta är förmågor som kursplanen i matematik anger att undervisningen ska ge eleverna förutsättningar att utveckla, och som forskning lyfter fram att elever i svensk skola behöver förstärka. Översikten rör också frågor om hur lärare kan möta och ta tillvara elevers olikheter i undervisningen, närmare bestämt hur lärare kan få med elever som inte är så benägna att delta i gemensamma resonemang, och hur elevers olika idéer kan bli en del av de matematiska samtalen och berika dem. Översikten utgår från följande frågeställning:Vad kännetecknar klassrumsdialoger som engagerar elever i matematiskaresonemang och som möter och tar tillvara elevers olikheter, och vad kännetecknarlärarens ledning av sådana dialoger?Översikten är en sammanställning av arton forskningsstudier som systematiskt har valts ut av forskare efter omfattande litteratursökningar i internationella forskningsdatabaser. Sökningarna resulterade i 10 528 studier.Studierna bygger på ingående observationer och analyser av dialoger i helklass mellan lärare och elever. Det är klassrumssituationer som lärare skulle kunna känna igen sig i. Analyserna sätter ord på det som sker och ger förståelse i form av olika begrepp och strukturer. Denna vetenskapligt grundade kunskap kan utgöra stöd för lärare när de planerar och leder klassrumsdialoger i matematikundervisningen.
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| 9. |
- Johansson, Marie, 1973-, et al.
(författare)
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Prefabricerade ytterväggselement för KL-trästommar
- 2023
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Prefabricated external wall elements for CLT systems This is a first pre-study to how building with cross-laminated timber (CLT) as a frame system in buildings could be made more efficient using prefabricated exterior wall elements as frame completion for CLT buildings. In carrying out this study, CLT building in Sweden as a rule involves an efficient frame erection of the CLT elements, but with a relatively slow phase to assemble the exterior frame completion. External frame completion of CLT buildings is usually carried out on construction scaffolding, where the layers of insulation and surface layer are built up on site. Prefabrication of the outer layers of the CLT frame that is lifted into place has the potential to save a lot of labor time and thus costs. The report presents requirements and practical aspects that must be taken into account in order for prefabricated exterior wall elements to be feasible in terms of requirements and in practice. The purpose of the report has also been to give tips, inspiration and ideas to consider when producing prefabricated exterior wall elements. In the study, an example solution has been developed with the aim of being wood based to as high degree as possible. The result shows that with relatively simple means it is possible to build a prefabricated wall element that meets established requirements. It is desirable that the outer wall elements are hung in place with the minimum possible finishing work on the facade. When it comes to the division of external wall elements, it is practical to follow a similar division and measurements as for the CLT boards to facilitate handling, assembly and lifting. It should be avoided to have sockets (window panes, door holes and the like) that are broken in its interface between the external wall elements to facilitate uniformity in the dimensioning of the elements. The study shows that it is realistic to create prefabricated exterior wall elements for CLT frames.
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| 10. |
- Just, Alar, et al.
(författare)
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Execution of timber structures and fire safety
- 2016
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Ingår i: WCTE 2016. - 9783903024359 ; , s. 5555-5562
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Konferensbidrag (refereegranskat)abstract
- Fire safety is one of the six essential performance requirements to consider when building timber structures. Fire safety has to be proven for the whole building process and the end use of the building. On the building site during the execution there might be an increased risk for fire spread because of large amounts of unprotected timber and relatively open structures. Work processes dealing with high temperatures, smoking, vandalism or other reasons can lead to ignition of timber and end up with serious damages. Fire safety on the building site should be handled from the very beginning to the final stage of execution. During the execution the designed solutions have to be checked and followed. This paper gives the background and principles that should be considered in a new Nordic standard for execution of timber structures in terms of fire safety.
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