| 1. |
- Alipour, Yousef, 1979-, et al.
(author)
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The analysis of furnace wall deposits in a low-NOx waste wood-fired bubbling fluidised bed boiler
- 2012
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In: VGB PowerTech Journal. - : VGB Power Tech. - 1435-3199. ; 92:12, s. 96-100
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Journal article (other academic/artistic)abstract
- Increasing use is being made of biomass as fuel for electricity production as the price of natural wood continues to rise. Therefore, more use is being made of waste wood (recycled wood). However, waste wood contains more chlorine, zinc and lead, which are believed to increase corrosion rates. Corrosion problems have occurred on the furnace walls of a fluidised bed boiler firing 100 % waste wood under low-NOx conditions. The deposits have been collected and analysed in order to understand the impact of the fuel.
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| 2. |
- de Alwis, Pahansen, 1980-
(author)
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On Evaluation of Working Conditions aboard High-Performance Marine Craft
- 2018
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Licentiate thesis (other academic/artistic)abstract
- High-Performance Marine Craft (HPMC) is a complex system confronted by the stochastic nature of the waves challenging the safety of life at sea. The personnel aboard these craft are vulnerable to detrimental conditions, in fact, limiting the system’s performance evoking the significance of the Human Factors Integration (HFI) in the design and operation of these craft. The risks related to the work environments at sea have inadequately been investigated. A consistently identified fact is that the exposure to work environments containing vibration and repeated shock elevates the risk of adverse effects on human health and performance. In the event that the exposure risk is known, the situation can be managed by the operators and the legislated health and safety demands can be achieved by the employer. Moreover, when quantification of the exposure-effect relationships is potential, human factors, in terms of health and performance, can be integrated into HPMC design and operation. However, the knowledge is limited about the adverse health and performance effects among the High-Performance Marine Craft Personnel (HPMCP), the factors causing theses effects and their relationships.The thesis presents a holistic approach for the integration of human factors, in terms of health and performance, into HPMC design and operation. A research program has been designed branching the design and operational requirements of HPMC concerning HFI. A method is introduced for a real-time crew feedback system, which monitors and characterizes vibration and shock conditions aboard HPMC, enabling determination of the risk of acute injuries due to the high-intensity instantaneous impact exposure and the acquired risk of adverse health and performance effects due to the accumulated vibration exposure. This brings forth the requirement of epidemiological studies in order to strengthen the exposure-effect relationships. Therefore, web-based questionnaire tools are developed, validated and pilot tested for cross-sectional and longitudinal investigation of health and performance in HPMCP. The work exposure is measured aboard HPMC in terms of vibration and investigated in relation to the adverse health and performance event onsets, and the ride perception of the personnel aboard.The introduced method for the real-time crew feedback is capable of informing the exposure risk in terms of human health and performance. The questionnaire tools are feasible for epidemiologically surveying HPMCP and similar populations providing data for investigating adverse health and performance effects, risk factors and their relationships. Promising trends are observed between the quantified work exposure and the health and performance onsets, and the human perception.The work will be continued to identify the exposure-effect relationships facilitating better use of the existing standards, supporting ongoing development of the existing standards and providing information to draw appropriate design and operational limits in rules and regulations.
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| 3. |
- Hagfeldt, A., et al.
(author)
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Dye-Sensitized Photoelectrochemical Cells
- 2013. - 2
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In: Solar cells. - Amsterdam, London : Elsevier. - 9780123869647 ; , s. 385-441
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Book chapter (other academic/artistic)abstract
- Production cost per peak watt of solar electricity produced is critical to various PV technologies and second-generation thin-film solar cells. The dye-sensitized solar cell (DSC), a molecular solar cell technology, has the potential to significantly lower production costs below previous PV technologies. DSC research groups have been established around the world. Integration into different products opens up new commercial opportunities for niche applications with large flexibilities in product shape, colour, and transparency.
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| 4. |
- Hagfeldt, A., et al.
(author)
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Dye-sensitized photoelectrochemical cells
- 2018. - 3
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In: McEvoy's Handbook of Photovoltaics: Fundamentals and Applications. - : Elsevier BV. ; , s. 503-565
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Book chapter (other academic/artistic)abstract
- Production cost per peak watt of solar electricity produced is critical to various PV technologies and second-generation thin-film solar cells. The dye-sensitized solar cell (DSC), a molecular solar cell technology, has the potential to significantly lower production costs below previous PV technologies. DSC research groups have been established around the world. Integration into different products opens up new commercial opportunities for niche applications with large flexibilities in product shape, color, and transparency.
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| 5. |
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| 6. |
- Lagerblad, Björn, et al.
(author)
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Hållbar övergång till helkross
- 2011
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In: Betong. - : Betong Media AB. - 1101-9190. ; :6, s. 39-40
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Journal article (other academic/artistic)
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| 7. |
- Leander, John, et al.
(author)
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Digitaliseringens möjligheter och utmaningar inom förvaltning och underhållsplanering av broar : Förstudie
- 2020
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Reports (other academic/artistic)abstract
- Rapporten behandlar digitalisering – att införa ny digital teknik – i förvaltningsverksamheten av broar. Omfattningen är en förstudie med syftet att identifiera behovet av framtida forskning för en långsiktig utveckling av broförvaltningen. En grundläggande ansats var att en digitalisering ska minska behovet av kostsamma underhållsåtgärder men bibehålla en hög säkerhet för våra broar.Projektets mål var att samla information om digitala informationsmodeller som skapas under investeringsskedet, utvärdera överlämningen av digitala modeller till förvaltningsskedet, och värdera den eventuella nyttan med digital informationsinsamling för tillståndsbedömning och underhållsplanering. En viktig del av detta var beskrivningen av dagens förvaltningssystem och hur det skulle kunna utvecklas.Studierna har bedrivits genom en enkätundersökning med respondenter från konsultfirmor aktiva inom broprojektering, intervjuer med tekniska experter och litteratursökningar.Resultatet visar att projekteringen av broar idag huvudsakligen görs genom byggnads-informationsmodellering (BIM). Inriktningen är mot byggskedet där samordning och kommunikation bedöms vara de största nyttorna. Överlämningen till förvaltningen består dock av relationsritningar i formen av enkla ritningsfiler. Trots att Trafikverkets strategi för BIM beskriver att en informationsmodell bör leva kvar under hela brons livslängd, finns det tveksamheter huruvida en modell från projekteringen är lämplig som förvaltningsmodell. Istället lyfts andra metoder fram för att skapa en modell av det byggda utförandet. Till exempel optiska metoder för skanning och fotogrammetri.Förvaltningssystemen bör utvecklas med funktioner för att lagra och tillgängliggöra stora mängder digital information från sensorer maskinella inspektioner. Syftet är att minska osäkerheterna i det byggda utförandet och graden av nedbrytning, för att slutligen skapa ett bättre underlag för beslut om åtgärder. Ett framtida scenario är en digital tvilling som speglar den verkliga konstruktionen och uppdateras kontinuerligt genom sensordata.Gällande hårdvara för mätningar behöver sensorer och system utvecklas med avseende på energiförbrukning, energiskördning och underhållsåtgärder, t.ex. genom kombinationer av utbytbara komponenter med kort livslängd och andra delar med lång livslängd. Fiberoptiska sensorer visar på lovande egenskaper men utveckling behövs för att göra dem mer kostnadseffektiva i relation till konventionella sensorer.
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| 8. |
- Rydefalk, Cecilia, Civilingenjör, et al.
(author)
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On the effect of maximum pressure and contact time in flexographic printing
- 2023
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In: TAPPICon 2023. - : TAPPI Press. ; , s. 993-
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Conference paper (other academic/artistic)abstract
- When adjusting the impression in a printing press both the maximum pressure induced and the contact length between the print form and the substrate is altered. In the present study lab-printing has been performed with controlled load cases. The load cases are either varying the time in contact or the maximum pressure. A lab-scale printing press was augmented with a pressure sensor that measures over a square area the width of the print. By altering the print-forms and force in the machine the curve of the print nip pressure was controlled. Printing was performed in both full-tone and half-tone and the printed result evaluated for mottle and dot-gain. The print performance metrics shows the influence of the different load cases.
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| 9. |
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| 10. |
- Silfwerbrand, Johan, et al.
(author)
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Stor steg för brandsäkerheten
- 2011
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In: Betong. - : Svenska betongföreningen. - 1101-9190. ; :1, s. 37-39
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Journal article (other academic/artistic)
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