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- Jeppsson-Grassman, Eva, 1944-, et al.
(author)
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Att drabbas och att forma sitt liv: om strategier bland funktionshindrade och arbetslösa
- 2003. - 1
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Book (other academic/artistic)abstract
- Med fokus på olika grupper och sammanhang har den här boken ambitionen att beskriva hur människor i svåra livssituationer försöker forma sina liv och hur de använder tillgängliga resurser. Människor är aktörer i sina liv och gör val även om deras handlingsutrymme är litet och svårigheterna stora.De grupper boken handlar om är kroniskt sjuka och funktionshindrade men också människor som under lång tid lever under svåra ekonomiska betingelser.Många begrepp används om människor som saknar eller håller på att gå miste om vissa viktiga resurser. Drabbade, utsatta, utslagna, exkluderade, marginaliserade, sårbara utstötta är uttryck som kommer till användning. Betoning ligger ofta mer på det problemfyllda livet än på människors sätt att försöka hitta lösningar. Den här boken handlar om hur människor själva agerar i och försöker finna vägar ut ur problematiska livssituationer.Boken riktar sig främst till studerande vid sociala omsorgs-, socionom-, arbetsterapeut- och vårdutbildningar. Den är också intressant för praktiker som arbetar med sociala frågor.
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- Kassamakova, L, et al.
(author)
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Al/Si ohmic contacts to p-type 4H-SiC for power devices
- 2000
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In: Materials Science Forum. - 0255-5476 .- 1662-9752. ; 338-3, s. 1009-1012
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Journal article (peer-reviewed)abstract
- The formation of Al/Si/p-4H SiC ohmic contacts at temperatures as low as 750 degreesC is reported in this paper. The dependence of electrical properties and contact morphology have been investigated as a function of the annealing regime in the interval 600-700 degreesC. The lowest contact resistivity of 3.8x10(-5) Omega .cm(2) was obtained at 700 degreesC annealing, however the most reproducible results were in the low 10(-4) Omega .cm(2) range. It has been established that the predominate current transport mechanism in the Al/Si/SiC contacts is thermionic-field emission. Atomic force microscopy showed that the addition of Si to the contact layer improves its morphology, and the pitting of annealed Al is not observed. The contacts developed are stable during ageing at 500 degreesC and at operating temperatures up to 450 degreesC. After the contacts testing with current density of 10(3) A/cm(2) at temperatures up to 450 degreesC, their contact resistivity decreases slightly.
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- Koskinen, Lars-Owe D., Professor, 1955-, et al.
(author)
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Cerebrovascular effects of the TRH analogues pGlu-3-methyl-His-Pro amide and pGlu-Glu-Pro amide : a comparison with TRH.
- 2000
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In: Upsala Journal of Medical Sciences. - : Upsala Medical Society. - 0300-9734 .- 2000-1967. ; 105:1, s. 73-83
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Journal article (peer-reviewed)abstract
- The goal of the study was to assess whether TRH analogues possess cerebrovascular effects similar to the native peptide. The neuropeptide thyrotropin releasing hormone (TRH) elicits cerebrovasodilation in several species under various conditions. The laser-Doppler method was employed to study the effects of TRH and the analogues pGlu-3-methyl-His-Pro amid (M-TRH) and pGlu-Glu-Pro amide. Intravenous (i.v.) injection of 300 microg kg(-1) of TRH elicited cerebrovasodilation and a 62% increase in blood flow within 1 minute. M-TRH, in a dose of 300 microg kg(-1) i.v., elicited a 80% increase in cerebral blood flow. Even a minute dose of M-TRH (625 ng kg(-1)) caused an increase in cerebral blood flow. No clear difference in effects on the cerebral blood flow was observed between spontaneously and mechanically ventilated animals, pGlu-Glu-Pro amide had no cerebrovascular effect.
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- Madsen, L.D., et al.
(author)
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Assessment of MgO(1 0 0) and (1 1 1) substrate quality by X-ray diffraction
- 2000
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In: Journal of Crystal Growth. - 0022-0248 .- 1873-5002. ; 209:1, s. 91-101
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Journal article (peer-reviewed)abstract
- MgO{1 1 1} and {1 0 0} crystals are widely used as substrates for thin film growth, in many different areas of research such as superconductors, and other oxide, metal and nitride films, multilayers and superlattices. Since the quality of the thin film can be strongly dependent on that of the substrate, the optimal film properties will only be fully conceived if the substrate is well characterized in advance. The goal of this work was to create a characterization method which was inexpensive, fast, efficient, and of course nondestructive, for assessing imperfect metal-oxide substrates. X-ray diffraction (XRD) was chosen because of its low cost, simplicity, nondestructiveness, and the fact that we have access to many different parameters using the same instrument. The miscut of the MgO crystals studied herein were characterized with a high resolution of 0.01°. The number of domains, their distribution and their size were characterized by ?-f maps and topography measurements. In this case, atomic force microscopy (AFM) was found to be more appropriate for assessing roughness than X-ray reflectivity measurements.
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- Maunsbach, K., et al.
(author)
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Integration of advanced gas turbines in pulp and paper mills for increased power generation
- 2001
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In: Journal of engineering for gas turbines and power. - : ASME International. - 0742-4795 .- 1528-8919. ; 123:4, s. 734-740
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Journal article (peer-reviewed)abstract
- The pulp and paper industry handles large amounts of energy and today produces the steam needed for the process and some of the required electricity. Several studies have shown that black liquor gasification and combined cycles increase the power production significantly compared to the traditional processes used today. It is of interest to investigate the performance when advanced gas turbines are integrated with next-generation pulp and paper mills. The present study focused on comparing the combined cycle with the integration of advanced gas turbines such as steam injected gas turbine (STIG) and evaporative gas turbine (EvGT) in pulp and paper mills. Two categories of simulations have been performed: (1) comparison of gasification of both black liquor and biomass connected to either a combined cycle or steam injected gas turbine with a heat recovery steam generator: (2) externally fired gas turbine in combination with the traditional recovery boiler The energy demand of the pulp and paper mills is satisfied in all cases and the possibility to deliver a power surplus for external use is verified. The study investigates new system combinations of applications for advanced gas turbines.
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- Nilsson, S, et al.
(author)
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Evaluations of the stability of sheathless electrospray ionization mass spectrometry emitters using electrochemical techniques
- 2001
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In: Analytical Chemistry. - : American Chemical Society (ACS). - 0003-2700 .- 1520-6882. ; 73:19, s. 4607-4616
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Journal article (peer-reviewed)abstract
- The processes that cause the failure of sheathless electrospray ionization (ESI) emitters, based on different kinds of gold coatings on fused-silica capillaries, are described and explained. The methods chosen for this study include electrochemical methods, ICPMS analysis of the electrolytes used, SEM studies, and electrospray experiments. Generally, the failure occurs by loss of the conductive coating. It is shown that emitters with sputter-coated gold lose their coatings because of mechanical stress caused by the gas evolution accompanying water oxidation or reduction. Emitters with gold coatings on top of adhesion layers of chromium and nickel alloy withstand this mechanical stress and have excellent durability when operating as cathodes. When operating as anodes, the adhesion layer is electrochemically dissolved through the gold film, and the gold film then flakes off. It is shown that the conductive coating behaves as a cathode even in the positive electrospray mode when the magnitude of a superimposed reductive electrophoretic current exceeds that of the oxidative electrospray current. Fairy-dust coatings developed in our laboratory (see Barnidge, D. R., et al. Anal. Chem. 1999, 71, 4115-4118) by gluing gold dust onto the emitter, are unaffected by the mechanical stress due to gas evolution. When oxidized, the fairy-dust coatings show an increased surface roughness and decreased conductivities due to the formation of gold oxide. The resistance of this oxide layer is however negligible in comparison with that of the gas phase in ESI. Furthermore, since no flaking and only negligible electrochemical etching of gold was found, practically unlimited emitter lifetimes may be achieved with fairy-dust coatings.
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