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Vuxenutbildarcentrums internationella arbete : erfarenheter från 70-tal till 00-tal
- 2022
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Editorial collection (other academic/artistic)abstract
- Den här boken är en dokumentation av en rad internationella samarbetsprojekt som genomfördes vid det dåvarande Vuxenutbildarcentrum och Folkhögskollärarprogrammet på Linköpings universitet från 1970-talet till en bit in på 2000-talet. Dessa projekt har inte tidigare dokumenterats, men erfarenheterna har funnits kvar i form av minnesanteckningar, dagböcker och personliga berättelser. Det internationella arbetet är en viktig del av den nuvarande vuxenpedagogiska avdelningens historia och identitet och några år in på 2010-talet beslutade några kollegor inom ramen för lokalavdelningen av Sveriges folkhögskollärarförbund (SFHL) att berättelserna om de internationella projekten borde sammanställas till en helhet. På grund av bakgrundsmaterialets karaktär är texterna inbördes olika, de är ofta detaljrika och persongalleriet omfattande. I gengäld kan formen ge mer färgstarka och livfulla berättelser än vad en mer stringent form skulle ge möjlighet till.
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- Bekö, Gabriel, et al.
(author)
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Ultrafine Particles: Exposure and Source Apportionment in 56 Danish Homes
- 2013
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In: Environmental Science & Technology. - : American Chemical Society (ACS). - 1520-5851 .- 0013-936X. ; 47:18, s. 10240-10248
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Journal article (peer-reviewed)abstract
- ABSTRACT: Particle number (PN) concentrations (10−300 nm in size) were continuously measured over a period of ∼45 h in 56 residences of nonsmokers in Copenhagen, Denmark. The highest concentrations were measured when occupants were present and awake (geometric mean, GM: 22.3 × 103 cm−3), the lowest when the homes were vacant (GM: 6.1 × 103 cm−3) or the occupants were asleep (GM: 5.1 × 103 cm−3). Diary entries regarding occupancy and particle related activities were used to identify source events and apportion the daily integrated exposure among sources. Source events clearly resulted in increased PN concentrations and decreased average particle diameter. For a given event, elevated particle concentrations persisted for several hours after the emission of fresh particles ceased. The residential daily integrated PN exposure in the 56 homes ranged between 37 × 103 and 6.0 × 106 particles per cm3·h/day (GM: 3.3 × 105 cm−3·h/day). On average, ∼90% of this exposure occurred outside of the period from midnight to 6 a.m. Source events, especially candle burning, cooking, toasting, and unknown activities, were responsible on average for ∼65% of the residential integrated exposure (51% without the unknown activities). Candle burning occurred in half of the homes where, on average, it was responsible for almost 60% of the integrated exposure.
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- de Hair, MJH, et al.
(author)
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Reply: To PMID 24574210
- 2014
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In: Arthritis & rheumatology (Hoboken, N.J.). - : Wiley. - 2326-5205 .- 2326-5191. ; 66:6, s. 1683-1684
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Journal article (other academic/artistic)
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- Gonzalez-Garnica, Marisol, et al.
(author)
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One dimensional Au-ZnO hybrid nanostructures based CO2 detection : Growth mechanism and role of the seed layer on sensing performance
- 2021
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In: Sensors and actuators. B, Chemical. - : Elsevier. - 0925-4005 .- 1873-3077. ; 337
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Journal article (peer-reviewed)abstract
- In the present research, hybrid Au-ZnO one-dimensional (1-D) nanostructures were grown on silicon substrates with an Al-doped ZnO (AZO) seed layer (Ultrasonic Spray Pyrolysis: USP grown) and no seed layer (NSL) using two different catalytic gold films of 2 nm and 4 nm, respectively. Consequently, such 1-D nanostructures growth was associated with the vapor-liquid-solid (VLS) and vapor-solid (VS) processes. Scanning electron microscopy (SEM) imaging analysis confirms that heat treatment triggered Au nanoparticles nucleation with varying diameters. The Au nanoparticles size and underneath seed layer texture strongly affect the morphology and aspect ratio of 1-D ZnO nanostructures. The seed layer (1-D USP) sample resulted in the growth of longer nanowires (NWs) with a high aspect ratio. The NSL sample showed the formation of nanorods (NRs) with a low aspect ratio mainly via VS growth process. X-ray diffraction (XRD), X-Ray photoelectron spectroscopy (XPS), and photoluminescence (PL) analysis also revealed the differences in the NWs and NRs properties and confirmed VLS and VS growth mechanisms. CO2 gas sensing performance at different concentrations was demonstrated, and NWs with seed layer showed a relatively higher sensing response. In contrast, NSL samples (NRs) exhibited two times faster response. A detailed gas sensing mechanism with different CO2 adsorption modes based on properties of 1D nanostructures has been discussed. Currently, CO2 sensing and capturing are critical topics in the green transition framework. The present work would be of high significance to the scientific field of NW growth and fulfill the urgent need for CO2 gas sensing.
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