| 1. |
- Abdalla, A. M., et al.
(författare)
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NdBaMn2O5+delta layered perovskite as an active cathode material for solid oxide fuel cells
- 2017
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Ingår i: Ceramics International. - : Elsevier BV. - 0272-8842. ; 43:17, s. 15932-15938
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Tidskriftsartikel (refereegranskat)abstract
- A layered perovskite, NdBaMn2O5+delta (NBMO), was synthesized by solid state reaction method in air. Rietveld analysis of X-Ray Diffraction (XRD) data showed the material crystallizing in orthorhombic symmetry (Pmmm space group). Scanning electron microscopy (SEM) was used to check the morphology and, the analysis of the micrographs exhibited a porous structure with in-situ growth of nanoparticles. Electrochemical Impedance Spectroscopy (EIS) measurements from 600 degrees C to 800 degrees C shows the highest conductivity value of 1.17 x 10(-1) S/cm obtained at 800 degrees C with low activation energy (Ea) of 0.3 eV in air. In 5% H-2/Ar gas mixture, the conductivity and activation energy values were 1.97 x 10(-2) S/cm and 0.4 eV, respectively at 800 degrees C. The DC conductivity measurements also showed that this material is highly conductive in air with a conductivity value of 0.75 S/cm at 850 degrees C. Dual chamber fuel cell measurements on Ni-YSZ/YSZ/NBMO cell using 5% H-2/Ar as fuel (from 700 degrees C to 800 degrees C) showed a maximum power density of 0.202 W/cm(2) at 800 degrees C. The relatively high conductivity of the material in air and low activation energy makes it a potential candidate as cathode for solid oxide fuel cells.
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| 2. |
- Abila, R., et al.
(författare)
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Oil extraction imperils Africa’s Great Lakes
- 2016
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Ingår i: Science. - : American Association for the Advancement of Science (AAAS). - 0036-8075 .- 1095-9203. ; 354:6312, s. 561-562
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- As the world's demands for hydrocarbons increase (1), remote areas previously made inaccessible by technological limitations are now being prospected for oil and gas deposits. Virtually unnoticed by the public, such activities are ongoing in the East African Great Lakes region, threatening these ecosystems famed for their hyper-diverse biota, including the unique adaptive radiations of cichlid fishes (2). Countries in the region see exploitation of hydrocarbon reserves as a vital economic opportunity. In the Lake Albert region of Uganda, for example, the government foresees a $3.6 billion oil profit per year starting in 2018—a sum almost as high as the country's current annual budget (3). However, oil extraction in the East African Great Lakes region poses grave risks to the environment and local communities.
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| 3. |
- Andersson, Fredrik, et al.
(författare)
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Market Solutions
- 2017
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Ingår i: Modernizing the Public Sector : Scandinavian perspectives - Scandinavian perspectives. - 9781138675940 - 9781315560328 ; , s. 181-192
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Bokkapitel (refereegranskat)abstract
- The reliance on market solutions by the Swedish public sector has increased significantly in recent decades. The Swedish example is characterized by an openness to market solutions in many public-sector activities and by a mix of procurement arrangements and choice-based arrangements. The overall experience is that the consequences of the extension of market solutions have been less profound than has been argued by either proponents or adversaries. The benefit of an extended reliance on market solutions is hard to evaluate, but in the examples considered in this chapter – elderly care, schooling and health care – a cautious interpretation is that there is evidence of some modest positive effects and little evidence of severely adverse effects.
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| 4. |
- Avenborg Thomasson, Anna, 1977, et al.
(författare)
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Football cities
- 2018
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Ingår i: IRSPM Conference in Edinburgjh, 10-13 April, 2018.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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| 7. |
- Bringselius, Louise, et al.
(författare)
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The unfolding of agency autonomy over time : The Swedish Social Insurance Agency 2003-2015
- 2017. - 1
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Ingår i: Modernizing the Public Sector : Scandinavian Perspectives - Scandinavian Perspectives. - 9781138675940 ; , s. 99-118
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Bokkapitel (refereegranskat)abstract
- The literature on agency autonomy typically assumes that agency autonomy is relatively stable over time and that it unfolds primarily in the relation between agencies and their parent ministries. This chapter challenges these assumptions. It explores how agency autonomy unfolds over time from a system-wide perspective, including the relation between the agency and its parent ministry, the relation between management and employees and the relation between the agency and the citizenry. Data from a qualitative case study of the Swedish Social Insurance Agency (SIA), covering the 12-yearperiod 2003–2015, is reported. Observations indicate that the agency/ministry relation has changed with each director-general but they also indicate that there is a delicate interaction between the three relations, where they all impact on one another. This suggests that agency autonomy may be best understood as volatile and formed in a complex web of relations.
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