| 1. |
- Andersson-Sköld, Yvonne, et al.
(författare)
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Landslide risk management : A brief overview and example from Sweden of current situation and climate change
- 2013
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Ingår i: International Journal of Disaster Risk Reduction. - : Elsevier. - 2212-4209. ; 3:March, s. 44-61
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Tidskriftsartikel (refereegranskat)abstract
- Landslide risk is a function of the probability of the event and its consequences. Previous research has shown that preventive measures to reduce the risk are preferred over reactive measures but, especially in developing countries, rarely undertaken. A contributing factor is the lack of evidence that preventive measures pay. This study includes a brief overview of landslide risk management in general and an investigation of the present risk management situation in Sweden based on interviews in 11 municipalities complemented with interviews in Norway. The result shows that climate change has become part of the general awareness and started to be taken into account in the municipal spatial planning. Landslide susceptibility maps and databases are useful tools in the complex spatial planning. The results indicate that the application of landslide susceptibility and risk maps as previously applied for preventive measures and spatial planning in the landslide prone area Gota alv river valley have been cost effective. Improved documentation and more active communication among different stakeholders would, however, contribute to more effective landslide management.
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| 2. |
- Asbjörnsson, Gauti, 1985, et al.
(författare)
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Quantifying Electrification Requirement of Mobile Crushing Units in Swedish SME Quarries
- 2022
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Ingår i: The proceedings of the 17th European symposium on comminution and classification.
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Konferensbidrag (refereegranskat)abstract
- The European aggregate industry faces the same challenges as other large industries in meeting the Agenda 2030 goals of net-zero emissions, as stated by the Sustainability Development Goal 13 [1]. In Sweden, the aim is to achieve this by 2045, where the intermediate goal is to have accomplished a 50 % reduction by 2030. As for most industries, the main focus is to investigate how to phase out fossil fuels and fossil-driven vehicles which can contribute with approximately 65 % of the greenhouse gas emissions for a medium size aggregates plant, for a smaller, off the grid, sites this will be higher. The other large contributors to greenhouse gas emission includes the explosives and electrical consumption of the equipment. How much the actual contribution from diesel to greenhouse gas emission depends on the selection and configuration of the heavy machinery, configuration of the process and the geological location of the site. This paper aims to describe the work done at Chalmers Rock Processing Systems and Stonepower AB within the first phase of Swedish Aggregates Producers Association project, Sustainable Smart Electrification of Small Quarries. The work aims to map out the crushers' electrical power requirements under different operating conditions in different quarries. This is to create a requirement specification for the development of a modular solution for more cost-effective battery-transformers package for a more economical feasible investment plan for smaller quarries.
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| 3. |
- Belitsky, Victor, 1955, et al.
(författare)
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SEPIA - A new single pixel receiver at the APEX telescope
- 2018
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Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 612
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Tidskriftsartikel (refereegranskat)abstract
- Context. We describe the new Swedish-ESO PI Instrument for APEX (SEPIA) receiver, which was designed and built by the Group for Advanced Receiver Development (GARD), at Onsala Space Observatory (OSO) in collaboration with ESO. It was installed and commissioned at the APEX telescope during 2015 with an ALMA Band 5 receiver channel and updated with a new frequency channel (ALMA Band 9) in February 2016. Aim. This manuscript aims to provide, for observers who use the SEPIA receiver, a reference in terms of the hardware description, optics and performance as well as the commissioning results. Methods. Out of three available receiver cartridge positions in SEPIA, the two current frequency channels, corresponding to ALMA Band 5, the RF band 158-211 GHz, and Band 9, the RF band 600-722 GHz, provide state-of-the-art dual polarization receivers. The Band 5 frequency channel uses 2SB SIS mixers with an average SSB noise temperature around 45 K with IF (intermediate frequency) band 4-8 GHz for each sideband providing total 4 × 4 GHz IF band. The Band 9 frequency channel uses DSB SIS mixers with a noise temperature of 75-125 K with IF band 4-12 GHz for each polarization. Results. Both current SEPIA receiver channels are available to all APEX observers.
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| 4. |
- Bergman, Magnus, 1985-
(författare)
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Att höra det förflutna till : Adlig minneskultur och kollektiv identitet efter ståndssamhällets upplösning, 1869-1976
- 2021
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Den här avhandlingen utgår från följande problemställning. Hur kunde adeln, en grupp i sådan hög grad påverkad av det äldre samhällets värld avprivilegier, börd och ståndsuppdelning, fortsätta att existera även under ochefter 1800- och 1900-talets moderna genombrott? Detta nya, framväxandesamhälles vägledande principer utgjordes ju snarare av sådant som jämlikhet, personlig förtjänst och tanken om medborgarskap, i mångt och mycket motsatsen till de ideal som tidigare varit förhärskande. I avhandlingenanläggs ett kulturhistoriskt perspektiv för att studera detta historiska problem, med utgångspunkten att det förflutna var av avgörande betydelse för att denadliga identiteten kunde upprätthållas efter ståndssamhällets upplösning. Dess syfte är att undersöka hur den svenska adelns kollektiva identitetupprätthölls och förändrades under perioden från det första adelsmötet, år 1869, till Riddarhusets 350-årsjubileeum, år 1976, genom att analysera denadliga minneskulturen. Källmaterialet som analyseras är huvudsakligenhämtat från adelns kollektiva verksamhet, i form av protokoll från periodensadelsmöten och medlemstidningen Arte et Marte. Avhandlingens teoretiska utgångspunkter är hämtade från memory studies-fältet. Avhandlingen består av tre delar, som studerar varsin aspektav den adliga minneskulturen: den performativa, den kommunikativa,respektive minneskulturens fixpunkter. Genom att analysera en rad olikafenomen relaterade till adeln, under mer än 100 år: statyer, historieböcker, jubileumsfester, privilegier, namnskyddslagar, herrgården och utdöendet avadliga ätter, undersöks gruppens minneskultur och den föränderliga adliga kollektiva identiteten
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| 5. |
- Johansson, Magnus, 1970-, et al.
(författare)
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How to measure efficiency in risk prevention?
- 2012
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Konferensbidrag (refereegranskat)abstract
- Risk assessment methods form corner stones in the striving to reduce risks and threats to human life and society. Proposed actions can be physical or non-physical and adopted or declined after political evaluation, with consideration taken to available resources and estimated effect on risk. To optimize and avoid regrettable actions, decision-makers are in need of well-founded analyses of how efficient different options might be. Analytically, there are several possible steps that can contribute.Firstly, the correlation between a measure and its effect should be based on causality, which often is difficult to establish quantitatively. High frequent accidents (e.g. traffic) can normally be treated statistically , while low frequent accidents with severe consequences (e.g. natural hazards) are more restricted to qualitative descriptions of correlation. Systematic monitoring of injury and damage data and gathering into databases, are a crucial activity for causality valuation. Secondly, economic valuation of effect is an important contribution in a cost-benefit perspective. Thirdly, a measure often brings several different effects and some may fall outside the actual purpose. An additional problem is how to handle effects that exert varied influence on different stakeholders or social groups in society. Fourthly, certain criteria are required for final prioritization. For instance, in analysis of goal fulfillment, effects are compared with politically decided quantified goals.In cases where basic data from steps 1-3 are incomplete, alternative criteria like “acceptable risk” might be necessary to agree about politically. To use similar approaches on how to describe and quantify effect correlations, promote gathered efforts at local level where risk reducing measures are decided upon by different actors and with regard to diverse local conditions. Tests of suitable methods and approaches to measure efficiency of planned or accomplished actions in gain for risk prevention, are described and discussed.
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| 6. |
- Yuan, Bo, 1985-, et al.
(författare)
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Polychlorinated alkanes in paired blood serum and breast milk in a Swedish cohort study : Matrix dependent partitioning differences compared to legacy POPs
- 2024
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Ingår i: Environment International. - : Elsevier. - 0160-4120 .- 1873-6750. ; 183
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Polychlorinated alkanes (PCAs) constitute a large group of individual congeners originating from commercial chlorinated paraffin (CP) products with carbon chain lengths of PCAs-C10-13, PCAs-C14-17, and PCAs-C18-32, occasionally containing PCAs-C6-9 impurities. The extensive use of CPs has led to global environmental pollution of PCAs. This study aimed to quantify PCAs in paired serum and breast milk of lactating Swedish mothers, exploring their concentration relationship.METHODS: Twenty-five paired samples of mothers' blood serum and breast milk were analysed and concentrations were determined for PCAs C6-32 and compared to 4,4'-DDE, the PCB congener 2,2',4,4',5,5'-hexachlorobiphenyl (CB-153), and hexachlorobenzene (HCB).RESULTS: The median concentrations of PCAs-C6-9, PCAs-C10-13, PCAs-C14-17, PCAs-C18-32 and ΣPCAs in serum were 14, 790, 520, 16 and 1350 ng/g lipid weight (lw), respectively, and in breast milk 0.84, 36, 63, 6.0 and 107 ng/g lw. Levels of 4,4'-DDE, CB-153 and HCB were comparable in the two matrices, serum and breast milk at 17, 12 and 4.9 ng/g lw. The results show significant differences of PCAs-C10-13 and PCAs-C14-17 in breast milk with 22- and 6.2-times lower lw-based concentrations than those measured in serum. On wet weight the differences serum/breast milk ratios of PCAs-C6-9, PCAs-C10-13, PCAs-C14-17, PCAs-C18-32 and ΣPCAs were 1.7, 3.2, 1.0, 0.4 and 1.6, respectively, while the ratio for 4,4'-DDE, CB-153 and HCB were each close to 0.1.CONCLUSION: Swedish lactating mothers had high serum concentrations of PCAs-C10-13 and PCAs-C14-17, with the ΣPCAs median serum concentration of 1350 ng/g lw. The breast milk concentration, although considerably lower at 107 ng/g lw, still surpassed those of 4,4'-DDE, CB-153 and HCB, suggesting an exposure risk of infants to PCAs. The variation in blood and breast milk accumulation between PCAs and studied legacy POPs, is rarely discussed but warrants further studies on partitioning properties as well as associated toxicological implications.
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