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| 2. |
- Forslind, B., et al.
(author)
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Elemental content of anagen hairs in a normal Caucasian population studies with proton induced X-ray emission (PIXE)
- 1986
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In: Scanning electron microscopy. - Chicago : IIT research institute. - 0586-5581. ; :Pt 1, s. 237-241
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Journal article (peer-reviewed)abstract
- The elemental content of anagen hair fibers in a Caucasian population of healthy females and males in the age range 10-69 years was performed to constitute a baseline for further studies of pathological conditions. Proton induced X-ray emission (PIXE) analyses were performed on single hair fibers in triplicate from 103 individuals in order to determine sulfur, zinc, calcium, and chlorine content. The hair fibers were all anagen hairs collected from a site little influenced by genetic and hormonal influences 1.5 cm above the right ear of the probands. An area 5-8 mm from the follicle bottom was chosen for the analysis in all cases to minimize effect of hair-do contamination. The average sulfur content was 0.049 g/g and the average zinc content 170 micrograms/g. These results were not significantly influenced by chloroform/ethanol rinsing before analysis. The calcium and chlorine contents were 330 micrograms/g and 0.0033 g/g respectively. The latter data are expected to be more seriously influenced by external factors (e.g., contamination) than sulfur and zinc. No correlation between elemental concentration and sex was found for sulfur and zinc in the present material. PIXE analysis of single hair fibers yields valuable information on the elemental composition of hair fibers and can be rapidly and efficiently performed after simple mounting procedures.
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| 3. |
- Andersson, AM, et al.
(author)
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Temperature dependence of the passivation layer on graphite
- 1999
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In: JOURNAL OF POWER SOURCES. - : ELSEVIER SCIENCE SA. - 0378-7753. ; 82, s. 286-290
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Journal article (other academic/artistic)abstract
- The elevated temperature stability of the Solid Electrolyte Interface (SEI) formed on graphite during the first charge/discharge cycle has been investigated. This was done in order to determine its role in the high-temperature degradation process which oc
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| 4. |
- Azasu, S, et al.
(author)
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CDIO in Africa
- 2019
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In: <em>Proceedings of the 15th International CDIO Conference</em>.
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Conference paper (peer-reviewed)
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| 5. |
- Broman Åkesson, Johanna, 1969-
(author)
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Med Gårdagens Dörr på glänt : Povel Ramel och melodins epok
- 2009
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Doctoral thesis (other academic/artistic)abstract
- The aim of this dissertation is to examine the style of the Swedish entertainer Povel Ramel (1922-2007) as a composer and lyricist of popular songs, and to elucidate his relation to the older popular music culture, denoted "the age of melody". In the main part of the study the author analyses more than 80 works by Ramel, which he created in the 1950s and 60s. Many of the most characteristic features of the age of melody are outlined as a background to the analysis. The age of melody was the first period of popular music in the Western world - from the music hall to the bossa nova. It ended when rock became dominant over older types of popular song ("schlager"). Its musical roots were in the 19th century European parlour and dance music but gradually it became more and more influenced by American folk music. Along with the development from the pre-industrial world to the modern, urban, industrial world there emerged strong tensions between old familiar national traditions and new foreign temptations and threats. These tensions marked both the intellectual modernism and the popular culture through the whole age. Povel Ramel was in many ways the typical composer of the age of melody. His work encompasses all its predominant styles, genres and features; he catches the humour, the optimism, the distance and the tension between the old and the new, the Swedish and the foreign. And yet he was unique. His uniqueness lies in his attention and awareness of these styles and features, and in his concentrated and varied interpretations of them. He reflected the notional worlds of the age of melody in both poetical and philosophical ways, but most of all - with an unusual sincere playfulness.
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| 6. |
- Cheah, S.K, et al.
(author)
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Nanostructure Electrodes for 3D Li-ion Microbatteries
- 2008
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In: Junior Euromat 2008 14-18 July, Lausanne (CH) oral presentation.
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Conference paper (pop. science, debate, etc.)abstract
- The vast development of surface micromachining technology has brought the proliferation of MEMS devices. However, the issue of powering the MEMS devices still remains as a great challenge. Although the conventional thin film 2D batteries seems promising for achieving high power density, however, relatively large area is required for having sufficient capacity. The drawbacks of 2D batteries can be overcome by using 3D architecture of Li-ion microbatteries.The 3D architecture of Li-ion microbatteries will have the advantages of short diffusion path as the electrode active materials are just tenth of nanometer deposited on the current collectors. The short diffusion path guarantees the high power performance. Besides that, the capacity of the microbatteries can be enhanced by just increasing the length of the electrode while keeping the areal footprint. This is what makes the 3D microbatteries a more promising power supply for MEMS.Our approach to synthesize a 3D Li-ion microbattery is starting with the synthesis of a nanostructure current collector using a template method. An anodized aluminium oxide (AAO) membrane is used as template for the electrodeposition of an aluminium current collector. AAO with defined pore sizes and inter-pores spacing are synthesized with a suitable diameter and interspacing where an aluminium current collector can grow within the template. The following step is the deposition of electrode active materials on the current collector. In this example Atomic Layer Deposition (ALD) is employed in order to achieve a well deposited layer of, in this case, a TiO2 cathode material. By controlling the deposition parameters, the crystal structure and the thickness of TiO2 layer can be altered to give a better electrochemical performance. Our results will be discussed in the light of the complexity of the deposition mechanisms of both the aluminium current collector nano-rods and the TiO2 layer.
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| 7. |
- Delczeg-Czirjak, Erna K., et al.
(author)
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Stabilization of the tetragonal distortion of Fe chi Co1-chi alloys by C impurities : A potential new permanent magnet
- 2014
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In: Physical Review B. Condensed Matter and Materials Physics. - 1098-0121 .- 1550-235X. ; 89:14, s. 144403-
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Journal article (peer-reviewed)abstract
- We have analyzed by density functional theory calculations the structural and magnetic properties of Fe-Co alloys doped by carbon. In analogy with the formation of martensite in steels we predict that such a structure also forms for Fe-Co alloys in a wide range of concentrations. These alloys are predicted to have a stable tetragonal distortion, which in turn leads to an enhanced magnetocrystalline anisotropy energy of up to 0.75 MJ/m(3) and a saturated magnetization field of 1.9 T.
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| 8. |
- Edström, Alexander, et al.
(author)
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Magnetic properties of (Fe1-xCox)(2)B alloys and the effect of doping by 5d elements
- 2015
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In: Physical Review B. Condensed Matter and Materials Physics. - 1098-0121 .- 1550-235X. ; 92:17
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Journal article (peer-reviewed)abstract
- We have explored, computationally and experimentally, the magnetic properties of (Fe1-xCox)(2)B alloys. Calculations provide a good agreement with experiment in terms of the saturation magnetization and the magnetocrystalline anisotropy energy with some difficulty in describing Co2B, for which it is found that both full potential effects and electron correlations treated within dynamical mean field theory are of importance for a correct description. The material exhibits a uniaxial magnetic anisotropy for a range of cobalt concentrations between x = 0.1 and x = 0.5. A simple model for the temperature dependence of magnetic anisotropy suggests that the complicated nonmonotonic behavior is mainly due to variations in the band structure as the exchange splitting is reduced by temperature. Using density functional theory based calculations we have explored the effect of substitutionally doping the transition metal sublattice by the whole range of 5d transition metals and found that doping by Re or W elements should significantly enhance the magnetocrystalline anisotropy energy. Experimentally, W doping did not succeed in enhancing the magnetic anisotropy due to formation of other phases. On the other hand, doping by Ir and Re was successful and resulted in magnetic anisotropies that are in agreement with theoretical predictions. In particular, doping by 2.5 at.% of Re on the Fe/Co site shows a magnetocrystalline anisotropy energy which is increased by 50% compared to its parent (Fe0.7Co0.3)(2)B compound, making this system interesting, for example, in the context of permanent magnet replacement materials or in other areas where a large magnetic anisotropy is of importance.
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| 9. |
- Edström, K.
(author)
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Potassium beta ''-aluminogallate
- 1999
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In: ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS. - : MUNKSGAARD INT PUBL LTD. - 0108-2701. ; 55, s. 1384-1388
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Journal article (other academic/artistic)abstract
- The single-crystal structure of a non-stoichiometric potassium beta "-aluminogallate, K1.67Mg0.67Al8.58Ga1.75O17, has been determined by X-ray diffraction. The Ga atoms were found to occupy predominantly a tetrahedral 6c site (space group m)
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| 10. |
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