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  • 51.
    Ebadi, Seyed Morteza
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Örtegren, Jonas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    A Tunable Plasmonic Wide Flat-Top Band-Pass Filter based on Trapezoid Resonator at Near-Infrared2021In: OSA Advanced Photonics Congress 2021: Integrated Photonics Research, Silicon and Nanophotonics 2021, Optics Info Base, Optical Society of America, 2021, p. 1-2, article id JTu1A.31Conference paper (Refereed)
    Abstract [en]

    A miniaturized and efficient tunable wide flat-top band-pass filter at NIR is proposed in a MIM plasmonic waveguide. Furthermore, numerical results illustrate that tunability is readily attained by varying length of right-angle trapezoid resonator.

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  • 52.
    Ebadi, Seyed Morteza
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Örtegren, Jonas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    A Tunable Wide Flat-Top Band-Pass Plasmonic Filter basedon Tilted T-Junction Resonators at Near-Infrared2021In: 2021 IEEE 21st International Conference on Nanotechnology (NANO), Montreal, QC, Canada: Institute of Electrical and Electronics Engineers (IEEE), 2021, p. 54-55Conference paper (Refereed)
    Abstract [en]

    A highly efficient and compact wide flat-top band-pass filter at NIR is realized in a MIM plasmonic waveguide.Besides, simulation results reveal that through tuning the length of resonators, a broadband band-pass transmission can beeasily achieved.

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  • 53.
    Ebadi, Seyed Morteza
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences. Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
    Örtegren, Jonas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    An Extremely Efficient and Compact Long-Wavelength Cut-Off Plasmonic Filter based on Stepped Impedance Resonators2021In: IEEE 2021 Photonics North (PN), Toronto, ON, Canada: IEEE, 2021, p. 1-1, article id 255-1oag-143Conference paper (Refereed)
    Abstract [en]

    We report the design and numerical results of a miniaturized and efficient plasmonic cut-off filter that is based on stepped impedance resonators and operates at telecom wavelengths.

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  • 54.
    Ebadi, Seyed Morteza
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Örtegren, Jonas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    An Extremely Miniaturized and Highly-Efficient High-Pass Wavelength Plasmonic Filter at Near-Infrared2020In: Frontiers in Optics / Laser Science, Optics Info Base, Optical Society of America, 2020, p. 1-2, article id JTh4B.8Conference paper (Refereed)
    Abstract [en]

    This letter describes design and numerical simulation of an extremely-compact and efficient high-pass plasmonic filter based on MIM waveguides. Numerical results shown that by tuning structural parameters, desired cut-off wavelengths can be chosen.

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  • 55.
    Ebadi, Seyed Morteza
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Örtegren, Jonas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    An Ultracompact and Efficient Long-Wavelength Plasmonic Cut-Off Filter based on Asymmetric E-Shaped Resonator2021In: OSA Advanced Photonics Congress 2021: Novel Optical Materials and Applications, Optics Info Base, Optical Society of America, 2021, p. 1-2, article id NoTh2D.6Conference paper (Refereed)
    Abstract [en]

    This paper presents design and simulation results of a super-compact and efficient plasmonic cut-off filter based on an asymmetric E-shaped resonator. Moreover, by modulating length of the resonator, cut-off wavelength can be easily adjusted.

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  • 56.
    Ebadi, Seyed Morteza
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Örtegren, Jonas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Chip-Scale and Tunable Flat-Top Surface Plasmon Polaritons Band-pass Filter at Optical Channels2021In: 2021 IEEE Research and Applications of Photonics in Defense Conference (RAPID), Institute of Electrical and Electronics Engineers (IEEE), 2021, p. 1-2Conference paper (Refereed)
    Abstract [en]

    We present the design and simulation results of a highly-miniaturized and efficient flat-top plasmonic band-pass filter based on a MIM waveguide. In addition to that, it is revealed that by adjusting the length of stub segment, the desired spectral response can be easily realized.

  • 57.
    Ebadi, Seyed Morteza
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
    Örtegren, Jonas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Bayati, Mohammad Sajjad
    Razi University, Kermanshah, Iran.
    Ram, Siamak Bonyadi
    British Columbia Institute of Technology, Burnaby, BC, Canada.
    A Multipurpose and Highly-Compact Plasmonic Filter based on Metal-Insulator-Metal Waveguides2020In: IEEE Photonics Journal, E-ISSN 1943-0655, Vol. 12, no 3, article id 4800309Article in journal (Refereed)
    Abstract [en]

    A multipurpose and ultra-compact nanoplasmonic wavelength filter based on stub structure in a metal-insulator-metal (MIM) waveguide is suggested and numerically investigated. A novel approach of connecting two stepped-like apertures to both input and output ports is applied to form Fabry-Perot (FP) cavities, which enabled the structure to act as a dual band-pass filter at wavelengths 1310 nm and 1550 nm. It is shown that the variation in cavities’ length allows to realize a long-wavelength cutoff filter, and cutoff wavelength can be easily tuned by adjusting the length of the cavities. Furthermore, it is revealed that increasing the gap between the stepped-like apertures and the cavities provides a triple band-pass at telecom wavelengths, e.g. 1267.5nm, 1414.19 nm, and 1644.7 nm. The tunable broadband high-pass wavelength filter is then achieved while the lengths of stepped-like apertures and stub resonators are set to be identical. Finally, a tunable nearly perfect absorber can be obtained by varying the width of stub resonators. Therefore, because of functionality, size, as well as efficiency the proposed plasmonic filter may greatly contribute to miniaturization of next generation of photonic integrated circuits (PICs), and find applications in on-chip integration and wavelength-division multiplexing (WDM) in optical communication systems.

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  • 58.
    Ebadi, Seyed Morteza
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Örtegren, Jonas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Yan, Max
    KTH.
    A Highly-Efficiency NIR Plasmonic Long-Wavelength Cut-Off Filter based on Stepped Impedance Resonators2021In: Frontiers in Optics + Laser Science 2021, Optics Info Base, Optical Society of America, 2021, p. 1-2, article id JTu1A.143Conference paper (Refereed)
    Abstract [en]

    We report design and simulation results of a high-efficiency long-wavelength cut-off filter realized by stepped impedance resonators. Moreover, numerical results confirm by modulating the length of resonator, cut-off wavelength can be easily tuned.

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  • 59.
    Edman, Mattias
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Warming effects on wood decomposition depend on fungal assembly history2021Data set
  • 60.
    Edman, Mattias
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Hagos, Saba
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Carlsson, Fredrik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Warming effects on wood decomposition depend on fungal assembly history2021In: Journal of Ecology, ISSN 0022-0477, E-ISSN 1365-2745, Vol. 109, no 4, p. 1919-1930Article in journal (Refereed)
    Abstract [en]

    1. Climate warming has the potential to drive changes in fungal community development and dead wood decomposition, but our understanding of this process is obscured by complex interactions between temperature and multiple other factors. A pivotal factor driving decay dynamics is fungal assembly history, yet its response to elevated temperature is poorly understood. 2. We investigated the combined effect of warming and assembly history on community composition, respiration and decomposition using experimental communities of wood‐decaying fungi on spruce wood. Assembly histories were assigned to microcosms under normal and elevated temperatures in a factorial design. 3. Both temperature and assembly history influenced wood mass loss and respiration. Temperature was the most important factor, but the effects of warming on decomposition varied greatly with fungal assembly history. Depending on which fungal species colonized first, warming of 5°C increased wood mass loss by 7‐57% after nine months. The large variation in decomposition response to warming resulted from differential responses in the growth of initial colonizers (pre‐inoculated) and their competitive ability, resulting in different decomposer communities. 4. Synthesis: Our study demonstrates that temperature and assembly history jointly determine deadwood decomposition and fungal community composition under controlled laboratory conditions. Further investigations are needed to confirm these results under natural conditions. Nevertheless, our findings highlight the importance of considering interactions between priority effects and climate factors to understand forest carbon feedbacks in the context of climate change.

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    Supporting information
  • 61.
    Ekenberg, Greta
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Utveckling av verktyg för rullbyte hos bandtransportör2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
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  • 62.
    Ekström, Magnus
    et al.
    Umeå University, Umeå; SLU, Umeå.
    Sandring, Saskia
    SLU, Umeå.
    Grafström, Anton
    SLU, Umeå.
    Esseen, Per-Anders
    Umeå University, Umeå.
    Jonsson, Bengt-Gunnar
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Ståhl, Göran
    SLU, Umeå.
    Estimating density from presence/absence data in clustered populations2020In: Methods in Ecology and Evolution, E-ISSN 2041-210X, Vol. 11, no 3, p. 390-402Article in journal (Refereed)
    Abstract [en]

    Inventories of plant populations are fundamental in ecological research and monitoring, but such surveys are often prone to field assessment errors. Presence/absence (P/A) sampling may have advantages over plant cover assessments for reducing such errors. However, the linking between P/A data and plant density depends on model assumptions for plant spatial distributions. Previous studies have shown, for example, how that plant density can be estimated under Poisson model assumptions on the plant locations. In this study, new methods are developed and evaluated for linking P/A data with plant density assuming that plants occur in clustered spatial patterns. New theory was derived for estimating plant density under Neyman–Scott-type cluster models such as the Matérn and Thomas cluster processes. Suggested estimators, corresponding confidence intervals and a proposed goodness-of-fit test were evaluated in a Monte Carlo simulation study assuming a Matérn cluster process. Furthermore, the estimators were applied to plant data from environmental monitoring in Sweden to demonstrate their empirical application. The simulation study showed that our methods work well for large enough sample sizes. The judgment of what is' large enough’ is often difficult, but simulations indicate that a sample size is large enough when the sampling distributions of the parameter estimators are symmetric or mildly skewed. Bootstrap may be used to check whether this is true. The empirical results suggest that the derived methodology may be useful for estimating density of plants such as Leucanthemum vulgare and Scorzonera humilis. By developing estimators of plant density from P/A data under realistic model assumptions about plants' spatial distributions, P/A sampling will become a more useful tool for inventories of plant populations. Our new theory is an important step in this direction. 

  • 63.
    Enström, Johanna
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences. Skogforsk.
    A Systems View of Advancements in Biomass Supply Chains2022Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    Forest fuel is an important source of energy with potential for increased use in the Nordic countries. Profitable forest operations are dependent on logistics as the forest is a natural resource with varying conditions over widespread areas. In comparison to saw log and pulp wood supply, forest fuel supply has to face challenges like low product value, seasonality and irregularity of customer demand, low bulk density and the need to process the biomass prior to delivery. In order to utilize both the economic potential and societal benefits from replacing fossil-based fuels with renewable forest fuels these challenges must be managed. This requires efficient long distance transports, with changes of transport mode typically required.

    This thesis examines preconditions necessary for logistic planning to achieve cost and energy efficient long distance transports within supply chains for forest fuel. The thesis has an explorative approach, including both qualitative and quantitative techniques. Paper I provides a review of the development within forestry logistics in Sweden and Finland since the beginning of the century, with focus on transports, terminal usage and storage related aspects. Paper II uses qualitative interviews to deepen the understanding of a specific forest fuel supply chain by focusing on communications and relations between the actors. Paper III is a study of  the influence of a terminal before maritime transport of wood chips using simulation. 

    Paper I shows that forestry logistics faces challenges, primarily related to increased variations in field conditions caused by climate change. The importance of terminal storage for the supply of forest products will likely increase as an effect. Also the entrepreneurs interviewed in Paper II stressed the benefits of terminals in the supply chain, e.g. enhanced planning opportunities and a more even workflow over the year. Paper III puts cost for extra terminal handling in relation to storage costs in a port and demonstrates the importance of including variation in logistic planning. The terminal flows were not profitable in the case of a small port. In order to make a well-founded decision gains in other parts of the supply chain must also be considered, even when they are harder to quantify. This deserves attention in future research.

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    Errata
  • 64.
    Esseen, Per-Anders
    et al.
    Umeå Univ, Dept Ecol & Environm Sci, SE-90187 Umeå, Sweden..
    Ekström, Magnus
    Umeå Univ, Dept Stat, USBE, Umeå, Sweden.;Swedish Univ Agr Sci, Dept Forest Resource Management, Umeå, Sweden..
    Grafström, Anton
    Swedish Univ Agr Sci, Dept Forest Resource Management, Umeå, Sweden..
    Jonsson, Bengt-Gunnar
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences. SLU.
    Palmqvist, Kristin
    Umeå Univ, Dept Ecol & Environm Sci, SE-90187 Umeå, Sweden..
    Westerlund, Bertil
    Swedish Univ Agr Sci, Dept Forest Resource Management, Umeå, Sweden..
    Ståhl, Göran
    Swedish Univ Agr Sci, Dept Forest Resource Management, Umeå, Sweden..
    Multiple drivers of large-scale lichen decline in boreal forest canopies2022In: Global Change Biology, ISSN 1354-1013, E-ISSN 1365-2486, Vol. 28, no 10, p. 3293-3309Article in journal (Refereed)
    Abstract [en]

    Thin, hair-like lichens (Alectoria, Bryoria, Usnea) form conspicuous epiphyte communities across the boreal biome. These poikilohydric organisms provide important ecosystem functions and are useful indicators of global change. We analyse how environmental drivers influence changes in occurrence and length of these lichens on Norway spruce (Picea abies) over 10 years in managed forests in Sweden using data from >6000 trees. Alectoria and Usnea showed strong declines in southern-central regions, whereas Bryoria declined in northern regions. Overall, relative loss rates across the country ranged from 1.7% per year in Alectoria to 0.5% in Bryoria. These losses contrasted with increased length of Bryoria and Usnea in some regions. Occurrence trajectories (extinction, colonization, presence, absence) on remeasured trees correlated best with temperature, rain, nitrogen deposition, and stand age in multinomial logistic regression models. Our analysis strongly suggests that industrial forestry, in combination with nitrogen, is the main driver of lichen declines. Logging of forests with long continuity of tree cover, short rotation cycles, substrate limitation and low light in dense forests are harmful for lichens. Nitrogen deposition has decreased but is apparently still sufficiently high to prevent recovery. Warming correlated with occurrence trajectories of Alectoria and Bryoria, likely by altering hydration regimes and increasing respiration during autumn/winter. The large-scale lichen decline on an important host has cascading effects on biodiversity and function of boreal forest canopies. Forest management must apply a broad spectrum of methods, including uneven-aged continuous cover forestry and retention of large patches, to secure the ecosystem functions of these important canopy components under future climates. Our findings highlight interactions among drivers of lichen decline (forestry, nitrogen, climate), functional traits (dispersal, lichen colour, sensitivity to nitrogen, water storage), and population processes (extinction/colonization).

  • 65.
    Fahmida Zaman, Irin
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Wood decaying fungi gain competitive strength through competition2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
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  • 66.
    Fallahjoybari, Nima
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.
    Engberg, Birgitta A.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.
    Persson, Johan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Large eddy simulation of turbulent pulp flow in a channel2020In: Journal of Non-Newtonian Fluid Mechanics, ISSN 0377-0257, E-ISSN 1873-2631, Vol. 285, article id 104409Article in journal (Refereed)
    Abstract [en]

    Large eddy simulation (LES) of turbulent flow of concentrated fiber suspension or pulp is carried out to investigate the flow and turbulence structures in a channel. The simulations are carried out for the turbulent flow of Eucalyptus pulp suspension using OpenFOAM for three fiber concentrations (c = 1.5, 2.0 and 2.5) and six different Reynolds numbers (6 <= Re-s <= 16,600). It is observed that the variation in flow regime is similar in the two lower fiber concentrations while the flow regime is highly affected by fiber concentration for c = 2.5. Visualizations of vortical structures for different Reynolds numbers and fiber concentrations are used to investigate different flow regimes. Variation of apparent viscosity with Reynolds number and fiber concentration is also presented to show its effect on the turbulent properties of fiber suspension flow. It is shown that the deviation of turbulent velocity profile from that of a Newtonian flow increases with an increase in Reynolds number and fiber concentration. Also, the extend of buffer layer increases at higher Re. Using the calculated turbulent velocity profile, the values of constant in logarithmic velocity profile is proposed for fiber suspension. Finally, a discussion is presented on the variation of turbulent intensities and Reynolds stress with Reynolds number and fiber concentration.

  • 67.
    Fallahjoybari, Nima
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.
    Engberg, Birgitta
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.
    Persson, Johan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Berg, Jan-Erik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.
    Investigation of pulp flow helicity in rotating and non-rotating grooves2021In: Proceedings of the Institution of mechanical engineers. Part E, journal of process mechanical engineering, ISSN 0954-4089, E-ISSN 2041-3009, Vol. 235, no 6, p. 2045-2058Article in journal (Refereed)
    Abstract [en]

    Numerical simulation of pulp flow in rotating and non-rotating grooves is carried out to investigate the effect of pulp rheological properties and groove geometry on the rotational motion of the pulp flow. The eucalyptus pulp suspension is considered as a working fluid in the present study whose apparent viscosity correlation is available from the experimental measurements reported in the literature. The simulations are carried out with OpenFoam for different values of pulp material, fiber concentrations, and groove cross-section. Helicity is introduced to measure the turnover rate of pulp flow in the groove due to the importance of such motion on the final properties of the pulp flow. A measurement of helicity magnitude and its distribution along the groove revealed that a change in the pulp material would significantly affect the flow structures within the groove. Further investigation on the effects of fiber concentration, c, showed that this parameter does not have a significant effect on the averaged helicity magnitude for c = 2.0 and 2.5, whereas the helicity distribution over the groove cross-section changes clearly for c = 1.5. The results showed that the helicity level is negligible for almost half of the cavity cross-section in the non-rotating groove simulations, which can be considered as a shortcoming of the original geometry of the groove. Therefore, a smaller cross-section for the groove is considered through which an enhancement in the helicity magnitude is observed. 

  • 68.
    Forsberg, Viviane
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Liquid-Phase Exfoliation of Two-Dimensional Materials: Applications, deposition methods and printed electronics on paper2019Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    After the unprecedented success of graphene research, other materials that can also be exfoliated into thin layers, like Transition metal dichalcogenides (TMDs) such as molybdenum disulfide (MoS2), have also become the subjects of extensive studies. As one of the most promising methods for large scale production of such materials, liquid-phase exfoliation (LPE) has also been the subject of extensive research and is maturing as a field to the point that devices using additive manufacturing and printed nanosheets are often reported. The stability of the nanosheets in environmentally friendly solvents, particularly in water, with or without stabilizers, is still a focus of great interest for sustainable and commercial production. In this thesis, different methods of LPE in water with and without stabilizers are investigated and discussed. Stabilizers such as surfactant sodium dodecyl sulfate (SDS) and modified cellulose2-hydroxyethyl cellulose (HEC), were employed. Because waterdoes not have surface energy parameters that match those of2D materials, the dispersions in water do not usually have a high yield. Therefore, to circumvent the use of organic solvents that are known to be able to successfully exfoliate and stabilize nanosheets of two-dimensional materials, this thesis focuses on water as the solution-process medium for exfoliation and the assisting stabilizers used to keep the exfoliated nanomaterials in dispersion with a long half-time. Surfactant-assisted dispersions are discussed together with test-printing resultsusing inkjet to deposit the material. Process parameters for the LPE method using HEC as a stabilizer are presented together with thin nanosheets characterized by Raman spectroscopy. Dispersions using HEC presented the longest half-time among the studied methods, higher than previously reported values for methods using mixed low-boiling-point solvents. Devices using exfoliated nanosheets have been fabricated and presented in the present study. The photoconductivity of MoS2 using a device fabricated with LPE MoS2 nanosheets and the cathodoluminescence of LPE MoS2 are discussed. Although fabricated with mechanically exfoliated nanosheets and not LPE ones, another photodetector fabricated with one of the MoS2 grades used in this thesis is presented to highlight the excellent photoresponse of this material. A method of producing thin nanosheets with-out stabilizers by pre-processing the MoS2 grades withs and papers is introduced. With this method, nanosheets with a lateral size of around 200nm and a concentration around 0.14 g L−1 - that is half the concentration at the same processing conditions in solvent n-methyl pyrrolidone (NMP) - are discussed. Inkjet printing as a deposition method is discussed together with the requirements for the 2D inks. Printed organic electronics using the conductive polymer PEDOT:PSS are compared to those using commercially-available graphene ink, with a focus on printing on paper substrates. In order to bring the thesis into perspective from materials to device fabrication, I study the suitability of inkjet paper substrates for printed electronics, by extensively characterizing the chemical and physical properties of their ink-receiving layers (IRLs) and their impact on the electronic properties of the conductive printed lines.

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  • 69.
    Forsberg, Viviane
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Process parameters of liquid-phase exfoliation of MoS2 in waterstabilized with 2-hydroxyethyl celluloseManuscript (preprint) (Other academic)
  • 70.
    Forsberg, Viviane
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences. KTH, Stockholm; Wallenberg Wood Science Centre, Stockholm.
    Mašlík, Jan
    Tomas Bata University in Zlín, Zlín, Czech Republic.
    Norgren, Magnus
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.
    Electronic performance of printed PEDOT:PSS lines correlated to the physical and chemical properties of coated inkjet papers2019In: RSC Advances, E-ISSN 2046-2069, Vol. 9, no 41, p. 23925-23938Article in journal (Refereed)
    Abstract [en]

    PEDOT:PSS organic printed electronics chemical interactions with the ink-receiving layer (IRL) of monopolar inkjet paper substrates and coating color composition were evaluated through Raman spectroscopy mapping in Z (depth) and (XY) direction, Fourier transform infrared spectroscopy (FTIR) and energy dispersive X-ray spectroscopy (EDS). Other evaluated properties of the IRLs were pore size distribution (PSD), surface roughness, ink de-wetting, surface energy and the impact of such characteristics on the electronics performance of the printed layers. Resin-coated inkjet papers were compared to a multilayer coated paper substrate that also contained an IRL but did not contain the plastic polyethylene (PE) resin layer. This substrate showed better electronic performance (i.e., lower sheet resistance), which we attributed to the inert coating composition, higher surface roughness and higher polarity of the surface which influenced the de-wetting of the ink. The novelty is that this substrate was rougher and with somewhat lower printing quality but with better electronic performance and the advantage of not having PE in their composite structure, which favors recycling. © 2019 The Royal Society of Chemistry.

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  • 71.
    Gaynullin, Aydar
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Lager, Anton
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Transport- och monteringsskydd för glaset på solfångare2020Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    När en solfångare ska transporteras från produktionslina till anläggning för bruk kan det förekomma skador. Det härdade glaset på solfångaren är känsligt för vassa föremål och mottagarröret likaså från överhettning av solen före installat-ion. Detta examensarbete har utförts i samarbete med Absolicon Solar Collector AB, som utvecklar, tillverkar och säljer en solfångare med den globalt högsta verkningsgraden någonsin i kommersiellt bruk. Syftet med arbetet har varit att minska antalet solfångare som skadas vid transport och montering för solfånga-ren Absolicon T160. Arbetet har även syftat till att minska monteringstiden för ett skydd till solfångaren. Arbetet har följt designprocessen bestående av fyra fa-ser: förstudie, analysfas, kreativ fas och genomförandefas. Inledningsvis stude-rades bakgrundsmaterial och en fältstudie hos företaget gjordes för att få en bre-dare uppfattning om problemet. Därefter utfördes analyser av marknad, aktivitet och funktion följt av en kravspecifikation. Arbetet fortlöpte med brainstorming, konceptskisser, utvärderingar och vidareutveckling av koncept. I den avslutande delen av arbetet skapades 3D-modeller av intressanta koncept vilka i sista hand kombinerades till ett slutgiltigt designförslag. Materialval utfördes för designen med CES EduPack som integrerades in i designförslaget för att utgöra ett slutgil-tigt koncept. Slutsatsen som kunde dras efter arbetet var att ett skydd i form av en hoprullbar duk med inbyggda lister var en godtagbar lösning givet arbetets avgränsningar. I lösningen utnyttjas befintlig geometri på solfångaren i vilken skyddet sätts fast på. Skyddet förhindrar att mottagarröret kommer i direkt kon-takt med solen under transport och montering. Direkt kontakt från föremål och dylikt med solfångarens glas undviks även vilket minskar skador. Monteringsti-den uppskattas även att ha reducerats. Därav har arbetets syfte och mål uppnåtts. Dock så har företagets krav på tillverkningskostnad inte kunnat upprätthållas. I framtida arbeten bör materialval vidare undersökas för att sänka kostnader. En förändring av konstruktionen bör även undersökas vilket troligtvis skulle kunna minska monteringstiden ytterligare.

  • 72.
    Grafström, Anton
    et al.
    Swedish Univ Agr Sci, Umeå.
    Ekström, Magnus
    Swedish Univ Agr Sci, Umeå; Umeå Univ, Umeå.
    Jonsson, Bengt-Gunnar
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Esseen, Per-Anders
    Umeå Univ, Umeå.
    Stahl, Göran
    Swedish Univ Agr Sci, Umeå.
    On combining independent probability samples2019In: Survey Methodology, ISSN 0714-0045, E-ISSN 1492-0921, Vol. 45, no 2, p. 349-364Article in journal (Refereed)
    Abstract [en]

    Merging available sources of information is becoming increasingly important for improving estimates of population characteristics in a variety of fields. In presence of several independent probability samples from a finite population we investigate options for a combined estimator of the population total, based on either a linear combination of the separate estimators or on the combined sample approach. A linear combination estimator based on estimated variances can be biased as the separate estimators of the population total can be highly correlated to their respective variance estimators. We illustrate the possibility to use the combined sample to estimate the variances of the separate estimators, which results in general pooled variance estimators. These pooled variance estimators use all available information and have potential to significantly reduce bias of a linear combination of separate estimators.

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  • 73. Granholm, Fredrik
    et al.
    Bylund, Dan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Shevchenko, Ganna
    Lind, Sara B.
    Henriksson, Anders E.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences. Sundsvall County Hospital, Sundsvall, Sweden.
    A Feasibility Study on the Identification of Potential Biomarkers in Pulmonary Embolism Using Proteomic Analysis2022In: Clinical and applied thrombosis/hemostasis, ISSN 1076-0296, E-ISSN 1938-2723, Vol. 28Article in journal (Refereed)
    Abstract [en]

    Acute pulmonary embolism (PE) is a common emergency with a high morbidity and mortality. Most clinical presentations are non-specific and there is a lack of suitable biomarkers for PE. For example, the traditional D-dimer tests shows a rather high sensitivity for PE, but yet a rather low positive predictive value due to its lack of specificity. Research on novel biomarkers for PE is thus of interest to improve early diagnostics and reduce the number of unnecessary computed tomography pulmonary angiogram (CTPA) scans performed. In this study we evaluate the feasibility to use label-free quantitative proteomics to discover potential biomarkers for acute PE and to monitor changes in proteins levels in PE patients over time. Blood was collected from 8 patients with CTPA verified PE and from 8 patients presenting with same symptoms but with a negative CTPA. The samples were analyzed by liquid chromatography-mass spectrometry and thirteen protein concentrations were found to be significantly changed in PE patients compared to the CTPA negative controls. This exploratory study shows that proteomic analysis can be used to identify potential biomarkers for PE as well as to monitor changes of protein levels over time. The complement proteins play a part in PE but further studies are needed to clarify their specific role in the pathophysiological process and to look for more specific proteins. 

  • 74.
    Guangning, Ma
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Afewerki, Samson
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Zhang, Keihang
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Ibrahem, Ismail
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.
    Cordova, Armando
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Accelerating Amine-Catalyzed Asymmetric Reactions by Intermolecular Cooperative Thiourea/Oxime Hydrogen-Bond Catalysis2021In: European Journal of Organic Chemistry, ISSN 1434-193X, E-ISSN 1099-0690, Vol. 2021, no 21, p. 3043-3049Article in journal (Refereed)
    Abstract [en]

    The ability of intermolecular cooperative thiourea/oxime hydrogen-bond catalysis for improving and accelerating asymmetric aminocatalysis is presented. The two readily available hydrogen-bond-donating catalysts operates in synergy with a chiral amine catalyst to accomplish highly stereoselective transformations. The synergistic catalyst systems simultaneously activate both electrophiles and nucleophiles, and make the transformations more chemo- and stereoselective. This was exemplified by performing co-catalytic enantioselective direct intermolecular α-alkylation reactions of aldehydes, direct aldol reactions, and asymmetric conjugate reactions, which gave the corresponding products in high yields and enantiomeric ratios.

  • 75.
    Gussman Lennström, Anton
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Lundberg, Selma
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Konstruktionskoncept till att skapa wellpappsprover i laboratoriemiljö2022Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Kraftliners are used to create, among other things, the surface layer for the paper product corrugated board. Corrugated board consists of a layer of kraftliner on either one or both sides of a wavy paper, called flute. On behalf of SCA R&D this bachelor's thesis investigates the possibility of creating a conceptual prototype for a machine that can create corrugated board samples in their laboratory. This is to be able to predict, via tests, how variations in the structure of the corrugated board affect its properties. The work was carried out using an iterative method where concepts were first developed and then evaluated repetitively until a final concept was developed. The concept development consisted of five iterations with the phases of concept generation, modeling, prototype development, prototype testing and evaluation. The work resulted in a final concept that led to an illustrated prototype on a smaller scale that shows how corrugated board samples could be created in SCA's R&D laboratory.

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  • 76.
    Gustavsson, Daniel
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Hellberg, Mattias
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Utveckling på nytt ergonomiskt handtag samt färgsättning på griptänger2020Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    En person som drabbats av reumatoid artrit eller andra sjukdomar som påverkar greppstyrkan hos en person kan behöva ett redskap för att enklare ta sig igenom sin vardag. Att ha ett hjälpmedel i form av en griptång kan då vara till stor hjälp. Detta arbete utförs åt Johan Sarskog på Eurotrade WS AB och är riktat mot att utveckla ett nytt mer ergonomiskt handtag till griptänger. Arbetet är ett designarbete som gått ut på att ta fram ett designförslag på ett nytt handtag till griptängerna NåLätt och NåFram som är produkter från Swereco. Dessa griptänger är hjälpprodukter för personer med nedsatt handstyrka och framförallt  de som är drabbade av reumatoid artrit vilket är en sjukdom som ofta påverkar en persons handstyrka. Ytterligare ska också nya färger samt nya digitala ritningar på tängerna tas fram.  För att utveckla detta handtag på bästa möjliga sätt genomfördes teoretiska studier om ergonomi och reumatoid artrit. Flera skisser ställdes därefter upp och utvärderades för att sedan tas vidare till skummodellering.  När modellerna var klara utfördes användartester och ommodellering i två omgångar för att fastställa bästa resultat och att modellen passar för både manliga och kvinnliga händer. En slutgiltig modell gjordes sedan i SolidWorks. För att lösa färgsättningen på tängerna utfördes en workshop.  Ritningarna gjordes med hjälp av redan befintliga ritningar från Swereco i SolidWorks.

     

    Svenska

    A person diagnosed with rheumatoid arthritis or other conditions that lower the hand strength of a person, might be in need of a tool helping them to easier get through their day to day life. Having a tool or specifically a gripper can be helpful in the matter. This work has been performed on behalf of Johan Sarskog and Eurotrade WS AB and is aimed at developing a new, more ergonomic handle for grippers. The work is a design related project and the goal is to make a design proposition on a new handle for the models NåLätt and NåFram.  These are grippers made by the company Swereco. The grippers are a product designed to help people with lower hand strength or more specifically for people diagnosed with rheumatoid arthritis which is a illness that often affect a person´s gripping strength. New color combinations and digital drawings are also to be made to upgrade from the old hand drawn drawings. Theoretical studies on ergonomics and rheumatoid arthritis were made to be able to develop this handle in the best possible way. Many sketches were made and evaluated to later make foam models  from. These models were later used in user tests where the people trying the handles gave feedback to make sure we made the most ergonomically correct handle that fits both men and women hands. When the best model was selected, it was modelled in SolidWorks. The new drawings were also made in SolidWorks. To solve the color setting, a workshop was carried out where test people gave propositions on what colors they thought would work best for both sexes.

     

  • 77.
    Gustavsson, Lovisa
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Sundberg, Malin
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Utveckling av segmentbytesrigg: En konceptframtagning av segmentbytesrigg för koniska segmenthållare2022Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    En segmentbytesrigg kan ofta användas vid segmentbyte för raffinörer. Raffinörer har stora hållare som det sitter segment i för att mala ned träflis till pappersmassa. Eftersom dessa nöts ut med tiden är det viktigt att de byts ut, och där är segmentbytesriggen ett viktigt användarverktyg. På uppdrag av Valmet i Sundsvall undersöker detta kandidatarbete möjligheten att förenkla en av Valmets nuvarande segmentbytesriggar. Detta för att göra den mindre dyr och komplex, och därmed mer lättillverkad och mer kostnadseffektiv. Arbetet har följt designprocessens tillvägagångssätt, vilket har bestått av tre stycken faser; analytisk, kreativ och en presentationsfas. Detta resulterade slutligen i ett nytt koncept för en segmentbytesrigg, som är mer simplifierad, billigare att tillverka, men fortfarande bibehåller samma huvud- och bifunktioner. Konceptet har fått kompromissa med viss praktisk bekvämlighet för att kunna nå målet om att göra riggen mer kostnadseffektiv och lättillverkad.

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  • 78.
    Guðmundsson, Arnar
    et al.
    Stockholm University.
    Bäckvall, Jan-Erling
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences. Stockholms Universitet.
    On the use of iron in organic chemistry2020In: Molecules, ISSN 1431-5157, E-ISSN 1420-3049, Vol. 25, no 6, article id 25061349Article in journal (Refereed)
    Abstract [en]

    Transition metal catalysis in modern organic synthesis has largely focused on noble transition metals like palladium, platinum and ruthenium. The toxicity and low abundance of these metals, however, has led to a rising focus on the development of the more sustainable base metals like iron, copper and nickel for use in catalysis. Iron is a particularly good candidate for this purpose due to its abundance, wide redox potential range, and the ease with which its properties can be tuned through the exploitation of its multiple oxidation states, electron spin states and redox potential. This is a fact made clear by all life on Earth, where iron is used as a cornerstone in the chemistry of living processes. In this mini review, we report on the general advancements in the field of iron catalysis in organic chemistry covering addition reactions, C-H activation, cross-coupling reactions, cycloadditions, isomerization and redox reactions. 

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  • 79.
    Guðmundsson, Arnar
    et al.
    Stockholm University.
    Manna, Srimanta
    Stockholm University.
    Bäckvall, Jan-Erling
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences. Stockholm University.
    Iron(II)-Catalyzed Aerobic Biomimetic Oxidation of Amines using a Hybrid Hydroquinone/Cobalt Catalyst as Electron Transfer Mediator2021In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 60, no 21, p. 11819-11823Article in journal (Refereed)
    Abstract [en]

    Herein we report the first FeII-catalyzed aerobic biomimetic oxidation of amines. This oxidation reaction involves several electron transfer steps and is inspired by biological oxidation in the respiratory chain. The electron transfer from the amine to molecular oxygen is aided by two coupled catalytic redox systems, which lower the energy barrier and improve the selectivity of the oxidation reaction. An iron hydrogen transfer complex was utilized as the substrate-selective dehydrogenation catalyst along with a bifunctional hydroquinone/cobalt Schiff base complex as a hybrid electron transfer mediator. Various primary and secondary amines were oxidized in air to their corresponding aldimines or ketimines in good to excellent yield. 

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  • 80.
    Gårdestam, Julia
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Utveckling av en resningsmaskin för tubformade förpackningar: Utveckling av resningsmaskin för SCA, Arcwise2021Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of this project has been to investigate methods for shaping a corrugated sheet, created by Arcwise (SCA), into a cylindrical tube. The work led to a concept of a Corrugated cardboard machine that produces Arcwise tubes. The machine is an entry-level model from manual work to automatic production. The development of the machine concept used is the method of Product development of industry. In the method were five of seven phases used: Feasibility study, product specification, concept development and concept generation, concept evaluation and concept selection and prototype. The feasibility study led to the fact that a suction cup and compressed air were good methods for lifting and moving the sheet between different stations. A corrugated sheet does not deform plastically during forming and therefore needs to be shaped from two directions. The machine concept that is developed are made with help of a requirements specification, mind map and an activity analysis. Pughs matrix were used to evaluate and decide which concept to develop further. The winning concept was a link arm solution that is visualized in CAD as a prototype. The purpose of the project where fulfilled, the Arcwise corrugated board can be shaped into a cylindrical tube and a production concept ready for manufacturing adaptation has been developed.

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  • 81.
    Hagos, Saba
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Effect of experimental warming and assembly history on wood decomposition2020Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Sammanfattning: Wood decay fungi are the main decomposer of lignocellulose material stored in wood. Thus, all factors that affect them could affect their ecological function. This in return, may affect ecosystem functioning in terms of altered carbon emissions from dead wood. Increased temperature is one of the main factors influencing fungal decay. The aim of the current study is to explore the effects of temperature and assembly history (order of species arrival), two important regulators of fungal communities, on wood decomposition. I conducted a microcosm experiment with two temperature treatments and eight assembly histories where each species was allowed to colonize the wood two weeks ahead of the rest of the species. The temperature treatments were set to mimic the effect of climate induced warming. Therefore, I had one treatment with relatively high temperature, representing the expected temperatures year 2100 given the current emission trends of the northern inland of Sweden, and another treatment representing the current normal temperature (1961-1990). The temperature treatments had an average difference of 5°C. In order to see how climate induced warming and fungal assembly history influenced decomposition, I measured and analyzed initial fungal growth, fungal respiration and wood weight loss. Both temperature and assembly history had a significant influence on fungal growth, fungal respiration and wood decomposition. There was also strong interaction between the two factors. The average increase in mass loss under elevated temperature was 19% compared to 14% under normal temperature. The highest mass loss (25%) was when Phlebia centrifuga was the initial species under elevated temperature and the lowest (12%) was when Climacocystis borealis was initial species under normal temperature. All assembly histories had higher mass loss under elevated temperature, but the magnitude varied. For example, when C. borealis was the initial species, mass loss increased by 60% compared to only 7% when Antrodia sinuosa was the initial species. Six out of eight assembly histories had higher CO2 under elevated temperature, with the highest increase (88%) in P. centrifuga histories and the lowest (7%) in C. borealis histories. Even if the results need to be confirmed by field studies, my data illustrates that climate induced warming probably results in higher fungal respiration and deadwood decomposition and that the magnitude of this effect depends on fungal assembly history.

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  • 82.
    Hailegebreal, Ermias
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Utveckling av mobil dockning för en tvåarmad robot2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    MTEK Industry är ett företag som utvecklar färdiga produktionslinjer till företag runt om i världen. En del av produktionslösningen bygger på användandet av roboten YuMi som är utvecklad av ABB. Då MTEK vill erbjuda en så flexibel lösning som möjligt har de utvecklat en fastsättningsmetod som fäster roboten mot arbetsbänken med hjälp av elektromagnetiska plattor; en mobil dockningsmetod. Den befintliga lösningen har dock ett spel i axiell led på grund av konstruktionen vilket påverkar precisionen för roboten negativt. Målet för projektarbetet har därmed varit att utveckla en ny fastsättningsmetod med förbättrad tolerans. Förundersökningen har utförts med hjälp av litteraturstudier, analys av befintlig fastsättningsmetod, löpande intervjuer med handledare och VD på MTEK samt en studie av liknande fastsättningsmetoder. Den bidrog med kunskap inför den konceptgenererande fasen som utfördes med hjälp av brainstorming och sållning. En konstruktion och simulation av konceptet utfördes i SolidWorks där en slutgiltig produkt sedan kunde produceras och analyseras. Förundersökningen visade att det idag enbart finns en liknande lösning för mobil dockning av robotar, Opiflex Automations lösning ”System for docking of a movable platform”. Dockningsmetoden som använder sig av styrpinnar är patenterad vilket resulterade i att många idéer till ett koncept för MTEK inte gick att använda då de inte uppfyllde kraven som hade ställts. Istället för ett helt nytt koncept utvecklades deras befintliga dockningsmetod som resulterade i ett slutkoncept med en förbättrad tolerans på nästan 10 gånger. Konceptet uppfyllde samtliga krav som var ställda från MTEK och anses därmed som lyckat. 

  • 83.
    Haller, Henrik
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Ecotechnology and Suistainable Building Engineering.
    Paladino, Gabriela
    Dupaul, Gabriel
    Holm, Svante
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Hadzhaoglu, Burdhzu
    Eivazihollagh, Alireza
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.
    Gamage, Shiromini
    Hedenström, Erik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.
    Jonsson, Anders
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Ecotechnology and Suistainable Building Engineering.
    Polluted lignocellulose waste as a resource for marketable products2020In: Proceedings Linnaeus ECO-TECH 2020, 2020Conference paper (Refereed)
    Abstract [en]

    Fiberbanks and fiber-rich sediments are legacies of the previously unregulated wastewater discharge from the pulp and paper industry that have accumulated large quantities of toxic organic waste on the Baltic Sea floor and on the bottom of rivers and lakes. Several km2 are covered with deposits of fibrous residues that are, typically, heavily polluted with a number of organic and inorganic substances, posing a serious threat to human and ecological health. High toxicity and the large volume of the polluted material are challenges for remediation endeavors. However, since the fibrous material is a bioresource with a high energy density, the sheer quantity of it could appeal to commercialization as feedstock for various marketable products. This study sets out to explore the potential of using this polluted material as a resource for industrial production, by reviewing and synthesizing data about modern production methods or reuse alternatives for lignocellulose material that can be adapted to a polluted feedstock. Biochemical methods such as composting, anaerobic digestion, as well as, thermochemical methods, for instance, HTC, HTL, pyrolysis, gasification etc. have been assessed. Potential end products from fiber bank material include biochar, liquid and gaseous biofuels, growth media, and fatty acids and proteins produced by white-rot fungi.

  • 84.
    Haller, Stefan
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
    Persson, Johan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Cheng, Peng
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
    Bertilsson, Kent
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
    Multi-phase winding with in-conductor direct cooling capability for a 48V traction drive design2020In: Proceedings - 2020 International Conference on Electrical Machines, ICEM 2020, IEEE, 2020, p. 2118-2124Conference paper (Refereed)
    Abstract [en]

    Traction drive applications demand high power density motors with a good stator cooling design. We propose a novel multi-phase winding for a 48 V traction drive design having identical preformed hollow copper conductors with in-conductor direct cooling capability. This paper studies the cooling performance of an individual conductor phase using either EGW50/50 or water as coolant. Analytical calculations and experiments are conducted on a straight conductor of the same length using 20°C water as coolant. The results are then cross verified with those from the FEM simulations to validate the simulation setup. Then a final simulation is conducted at a current of 700A and a current density of 49.5 A/mm 2 on the preformed conductor using 65 CEGW50/50 as coolant at a pressure of 140kPa. The results highlight the exceptional performance of the cooling design which enables a power dissipation of 71OW at a maximum conductor temperature rise of only 56. 9 C. 

  • 85.
    Hellström, Douglas
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Sundström, Simon
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Standardisering av OQL-200 systemet: Konstruktion av automatiskt snabbfästessystem för hjullastare2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Målet med denna undersökning har varit att konstruera ett standardiserat snabbfäste som passar rörelsemönstret hos minst fyra hjullastare med en tjänstevikt upp till åtta ton. Snabbfästet ska konstrueras med ett helt standardiserat redskapsfäste. Snabbfästet ska ges möjlighet till små dimensions-förändringar som ska underlätta för konstruktörsarbetet på OilQuick. En tidsplan och en kravspecifikation sattes upp, följt av en marknadsundersökning på hjullastare och snabbfästen. Fem hjullastare mättes och modellera-des digitalt. Genom geometrierna hos hjullastarna beräknades relevant maskindata såsom den maximala momentkraften kring nedre infästningen på snabbfästet. Detta presenterades i en tabell. Konceptutvecklingen inleddes med att presentera begränsningar i modelleringen genom att bestämma in-fästningspunkter på maskiner och de standardiserade måtten på redskaps-fästet. Under konceptutvecklingen togs fyra koncept fram där samtliga koncept skulle tillåta maskinernas rörelsemönster. Koncepten utvärderades ge-nom Concept Scoring som utgick ifrån kravspecifikationen. Resultatet visade på ett teoretiskt fungerande snabbfästeskoncept som uppfyller målet och stora delar av den uppsatta kravspecifikationen. Slutkonceptet tillåter enkel anpassningsbarhet mellan maskiner och hindrar inte deras rörelsemönster. Nedre delen av snabbfästet är standardiserad och redskapsfästet är fullständigt standardiserat. Interface mellan snabbfästet och redskapsfästet är standardiserat. Hydrauliklösningen på snabbfästet är innesluten och låsningen sker på undersidan av snabbfästet vilket bidrar till hög felsäkerhet vid låsning, låg klämrisk och liten dammbildning vid hydraulik och elektricitets-inkopplingen. Redskapsfästet är utrustad med en skyddslucka som automatiskt öppnas vid inkoppling. Undersökningen har visat att det är möjligt att skapa en snabbfästesstandard för hjullastare i den angivna viktklassen men det kommer med en del krav. Slutkonceptet kräver att ett fåtal länkar hos de uppmätta maskinerna byts ut.

  • 86. Hepworth, Jo
    et al.
    Antoniou-Kourounioti, Rea L.
    Berggren, Kristina
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Selga, Catja
    Tudor, Eleri H.
    Yates, Bryony
    Cox, Deborah
    Collier Harris, Barley Rose
    Irwin, Judith A.
    Howard, Martin
    Säll, Torbjörn
    Holm, Svante
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Dean, Caroline
    Natural variation in autumn expression is the major adaptive determinant distinguishing Arabidopsis FLC haplotypes2020In: eLIFE, E-ISSN 2050-084X, Vol. 9Article in journal (Refereed)
    Abstract [en]

    In Arabidopsis thaliana, winter is registered during vernalization through the temperature-dependent repression and epigenetic silencing of floral repressor FLOWERING LOCUS C (FLC). Natural Arabidopsis accessions show considerable variation in vernalization. However, which aspect of the FLC repression mechanism is most important for adaptation to different environments is unclear. By analysing FLC dynamics in natural variants and mutants throughout winter in three field sites, we find that autumnal FLC expression, rather than epigenetic silencing, is the major variable conferred by the distinct Arabidopsis FLChaplotypes. This variation influences flowering responses of Arabidopsis accessions resulting in an interplay between promotion and delay of flowering in different climates to balance survival and, through a post-vernalization effect, reproductive output. These data reveal how expression variation through non-coding cis variation at FLC has enabled Arabidopsis accessions to adapt to different climatic conditions and year-on-year fluctuations. 

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  • 87.
    Holmqvist, Elias
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Improvement of photodarkening resistivity in ytterbium-doped optical fibers by co-doping2022Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    A fiber laser is a laser that uses optical fibers as its gain medium. These laser-active optical fibers are doped with rare-earth ions with energy levels suitable for laser use. A problem that occurs when using ytterbium-doped fiber lasers is that they lose efficiency over time to a mechanism called photodarkening. Photodarkening occurs because the ytterbium ions are excited to a charge transfer band where they start to accept free electrons from the surrounding material, creating holes which absorb parts of the input power of the laser. To combat Photodarkening, doped fibers are co-doped with elements that have an affinity for donating electrons, “filling” the holes and preserving the transmission properties of the doped fibers. This study investigates how ytterbium-doped fibers co-doped with europium compares to conventional doped fibers regarding their resistivity to photodarkening and to their efficiency when used in the context of gain medium in a fiber laser. The fibers are artificially darkened and the losses in transmission per meter is measured. Luminescence measurements are done to show the presence of europium in the fibers. To measure the efficiency of the fibers, a fiber amplifier is constructed, and the output signal is plotted against the absorbed pump power. The europium co-doped fibers are found to have an increased resistivity to photodarkening but a slightly lower efficiency with increasing amounts of europium.

  • 88.
    Hong Duc, Pham
    et al.
    School of Chemistry and Physics, Science and Engineering Faculty, Queensland University of Technology (QUT), Brisbane 4000, Australia.
    Horn, Michael
    Centre for Materials Science, Queensland University of Technology (QUT), 2 George Street, Brisbane 4000, Australia.
    Joseph, F.S Fernando
    Queensland University of Technology (QUT).
    Patil, Rohan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Phadatare, Manisha R.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Golberg, Damitri
    Queensland University of Technology (QUT).
    Olin, Håkan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Dubal, Deepak
    School of Chemistry and Physics, Science and Engineering Faculty, Queensland University of Technology (QUT), Brisbane 4000, Australia.
    Spent graphite from end-of-life Li-ion batteries as a potential electrode for aluminium ion battery2020In: Sustainable Materials and Technologies, ISSN 2214-9937, article id e00230Article in journal (Refereed)
    Abstract [en]

    Graphite is central in almost all commercial Li-ion batteries (LIBs) and possesses attractive physical and chemical properties such as good ionic conductivity and layered graphitic structure. In this communication, we have demonstrated the recycling of graphite from end-of-life LIBs and the re-purposing of the recovered material for positive electrodes in next-generation aluminium-ion-batteries (AIBs). The recovered graphite possesses enlarged interlayer spacing which is shown to effectively boost Al-ion insertion/de-insertion during the charge/discharge processes. Excellent Al-ion storage performance is achieved with the capacity reaching 124 mAh g−1 at 50 mA g−1. The material retained a capacity of 55 mAh g−1 even after the applied current was increased to 500 mA g−1, showing its capability to deliver high rate performance. The charge/discharge cycling further revealed that the graphite retains 81% of its initial capacity even after 6700 cycles at a high rate of 300 mA g−1. This excellent aluminium ion storage performance makes the recovered graphite a promising positive electrode material, providing a possible solution for the recycling of huge amounts of LIB scrap. At the same time, this material aids the development of alternative sustainable battery technology, as an alternative to LIBs.

  • 89.
    Huang, Ivy
    et al.
    Northwestern Univ, Ctr Biointegrated Elect, Evanston, IL 60208 USA.;Northwestern Univ, Querrey Simpson Inst Bioelect, Evanston, IL 60208 USA.;Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA..
    Zhang, Yamin
    Northwestern Univ, Ctr Biointegrated Elect, Evanston, IL 60208 USA.;Northwestern Univ, Querrey Simpson Inst Bioelect, Evanston, IL 60208 USA..
    Arafa, Hany M.
    Northwestern Univ, Ctr Biointegrated Elect, Evanston, IL 60208 USA.;Northwestern Univ, Querrey Simpson Inst Bioelect, Evanston, IL 60208 USA.;Northwestern Univ, Dept Biomed Engn, Evanston, IL 60208 USA..
    Li, Shupeng
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Vazquez-Guardado, Abraham
    Northwestern Univ, Ctr Biointegrated Elect, Evanston, IL 60208 USA.;Northwestern Univ, Querrey Simpson Inst Bioelect, Evanston, IL 60208 USA..
    Ouyang, Wei
    Northwestern Univ, Ctr Biointegrated Elect, Evanston, IL 60208 USA.;Northwestern Univ, Querrey Simpson Inst Bioelect, Evanston, IL 60208 USA..
    Liu, Fei
    Northwestern Univ, Ctr Biointegrated Elect, Evanston, IL 60208 USA.;Northwestern Univ, Querrey Simpson Inst Bioelect, Evanston, IL 60208 USA.;Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA..
    Madhvapathy, Surabhi
    Northwestern Univ, Ctr Biointegrated Elect, Evanston, IL 60208 USA.;Northwestern Univ, Querrey Simpson Inst Bioelect, Evanston, IL 60208 USA.;Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA..
    Song, Joseph Woojin
    Northwestern Univ, Dept Biomed Engn, Evanston, IL 60208 USA..
    Tzavelis, Andreas
    Northwestern Univ, Ctr Biointegrated Elect, Evanston, IL 60208 USA.;Northwestern Univ, Querrey Simpson Inst Bioelect, Evanston, IL 60208 USA.;Northwestern Univ, Dept Biomed Engn, Evanston, IL 60208 USA..
    Trueb, Jacob
    Northwestern Univ, Ctr Biointegrated Elect, Evanston, IL 60208 USA.;Northwestern Univ, Querrey Simpson Inst Bioelect, Evanston, IL 60208 USA..
    Choi, Yeonsik
    Northwestern Univ, Ctr Biointegrated Elect, Evanston, IL 60208 USA.;Northwestern Univ, Querrey Simpson Inst Bioelect, Evanston, IL 60208 USA..
    Jeang, William J.
    Northwestern Univ, Ctr Biointegrated Elect, Evanston, IL 60208 USA.;Northwestern Univ, Querrey Simpson Inst Bioelect, Evanston, IL 60208 USA..
    Forsberg, Viviane
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences. Northwestern Univ, Ctr Biointegrated Elect, Evanston, IL 60208 USA.
    Higbee-Dempsey, Elizabeth
    Northwestern Univ, Dev Therapeut Core, Evanston, IL 60208 USA..
    Ghoreishi-Haack, Nayereh
    Northwestern Univ, Dev Therapeut Core, Evanston, IL 60208 USA..
    Stepien, Iwona
    Northwestern Univ, Dev Therapeut Core, Evanston, IL 60208 USA..
    Bailey, Keith
    Charles River Labs, Mattawan, MI 49071 USA..
    Han, Shuling
    Northwestern Univ, Feinberg Sch Med, Comprehens Transplant Ctr, Chicago, IL 60611 USA.;Northwestern Univ, Feinberg Sch Med, Dept Surg, Chicago, IL 60611 USA..
    Zhang, Zheng Jenny
    Northwestern Univ, Feinberg Sch Med, Comprehens Transplant Ctr, Chicago, IL 60611 USA.;Northwestern Univ, Feinberg Sch Med, Dept Surg, Chicago, IL 60611 USA..
    Good, Cameron
    Northwestern Univ, Ctr Biointegrated Elect, Evanston, IL 60208 USA.;Northwestern Univ, Querrey Simpson Inst Bioelect, Evanston, IL 60208 USA..
    Huang, Yonggang
    Northwestern Univ, Querrey Simpson Inst Bioelect, Evanston, IL 60208 USA.;Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA.;Northwestern Univ, Dept Mech Engn, Evanston, IL 60208 USA.;Northwestern Univ, Dept Civil & Environm Engn, Evanston, IL 60208 USA..
    Bandodkar, Amay J.
    North Carolina State Univ, Dept Elect & Comp Engn, Raleigh, NC 27606 USA..
    Rogers, John A.
    Northwestern Univ, Ctr Biointegrated Elect, Evanston, IL 60208 USA.;Northwestern Univ, Querrey Simpson Inst Bioelect, Evanston, IL 60208 USA.;Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA.;Northwestern Univ, Dept Biomed Engn, Evanston, IL 60208 USA.;Northwestern Univ, Dept Mech Engn, Evanston, IL 60208 USA.;Northwestern Univ, Feinberg Sch Med, Dept Neurol Surg, Chicago, IL 60611 USA..
    High performance dual-electrolyte magnesium-iodine batteries that can harmlessly resorb in the environment or in the body2022In: Energy & Environmental Science, ISSN 1754-5692, E-ISSN 1754-5706, Vol. 15, no 10, p. 4095-4108Article in journal (Refereed)
    Abstract [en]

    Batteries represent the dominant means for storing electrical energy, but many battery chemistries create waste streams that are difficult to manage, and most possess toxic components that limit their use in biomedical applications. Batteries constructed from materials capable of complete, harmless resorption into the environment or into living organisms after a desired period of operation bypass these disadvantages. However, previously reported eco/bioresorbable batteries offer low operating voltages and modest energy densities. Here, we introduce a magnesium-iodine chemistry and dual (ionic liquid/aqueous) electrolyte to overcome these limitations, enabling significant improvements in voltage, areal capacity, areal energy, areal power, volumetric energy, and volumetric power densities over any alternative. Systematic studies reveal key materials and design considerations. Demonstrations of this technology include power supplies for cardiac pacemakers, wireless environmental monitors, and thermal sensors/actuators. These results suggest strong potential for applications where commercial battery alternatives pose risks to the environment or the human body.

  • 90.
    Håkansson Lindqvist, Marcia
    et al.
    Mid Sweden University, Faculty of Human Sciences, Department of Education.
    Zimmerman, Jenny K M
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Ecotechnology and Suistainable Building Engineering.
    Gladh, Cathrine
    Mid Sweden University.
    Olofsson, Madelen
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Mattsson, Maria
    Mid Sweden University, Faculty of Human Sciences, Department of Education.
    Sustainability in Mid Sweden University everyday life (HIMUV): Project design and preliminary results to date.2022Conference paper (Other academic)
    Abstract [en]

    The base of this presentation is the project Sustainability in Mid Sweden University everyday life (HIMUV). The aim of the project is to increase knowledge regarding sustainable development among all university employees and students. Thereby, the project aspires to provide the opportunity to contribute to Mid Sweden University becoming an important player in the work for increased knowledge regarding sustainable development. During the project period of June 2021-2023, work in progress will increase and strengthen the sustainability culture among the university’s employees and students. However, to be able to work with sustainably, employees and students must know how the University defines sustainability and how it can become a natural part of everyday work to contribute to sustainable development. Therefore, the project will map the knowledge about sustainability work among the university’s different professional categories and design training materials for employees and students and suggest procedures for its use. Deliverables and goals include suggestions regarding what employees and students should know about sustainability. A collection of examples that show how different functions and subjects at the university can incorporate sustainability in everyday life will be used to produce a digital education material for employees and students. In this presentation, the project work to date will be reported.  Interviews, surveys and group meetings with employees in the area of sustainability will be presented as well as next steps in the project.  

  • 91.
    Höglund, Sebastian
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Pålad grundläggning i FEM-Design: Effektivisering av befintlig pålad grundläggning samt undersökning av FEM-Designs applicerade teorier.2021Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The aim of the work has been to model a piled foundation and the underlying ground for a multi-storey building in the CAD program FEM-Design. The model developed is evaluated and compared with a reference model. The study also examined FEM-Design and the reliability of their calculations and theories. To achieve the goals, a literature study was conducted to investigate the theories that Strusoft, the founders of FEM-Design, have used. To model the underlying ground, a soil model was created. The soil layers were created based on reading of weight probe testing from a geotechnical study. The piled foundation was produced with the help of an obtained CAD model of a multi-storey building, the accompanying loads and the geotechnical survey. The loads caused by the obtained CAD model are captured by point and line supports. A base of beams is constructed to spread the load to the piles, the distance between the piles is determined according to the value of the load. The force that went down into the pile was not allowed to exceed the buckling force stated in the geotechnical survey and was calculated with help from the partial coefficient method. The results showed that Strusoft's assumptions require an experienced geoconstructor for a realistic result. Furthermore, the result showed that the developed pile model contains 78 piles while the reference model contains 102 piles. Of 13 selected piles, none of the piles reached over 62% of the buckling force and in comparison with the reference model, all 13 are more efficient, at most with 57%.

     

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  • 92.
    Höglund, Sebastian
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Staaf, Carl
    Mid Sweden University.
    Utveckling av metod för finkalibriga ballistiska tester2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
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  • 93.
    Jawa, Mohammed
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Konstruktionsförslag för lastanordning till likbil2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syftet med arbetet var att analysera marknaden för att sedan ta fram ett konstruktionsunderlag för en lastanordning i en likbil för företaget Ortman Specialanpassningar. Konceptet skall innefatta en konstruktion med bland annat funktionalitetskrav som skall underlätta förflyttning och förvaring av en kista i en likbil. Projektet inleddes med en idé tillsammans med en förstudie som sedan gick över till en designprocess som är en utvecklingsprocess som ger användaren flera olika metoder under flera faser. Projektet gick igenom flera olika stadie där projektet planerades, kontexten utforskades, koncept utformning och till slut gick över till ett konstruktionsunderlags-stadie. Därefter analyserades konstruktionsunderlaget och simulerades genom en belastningsanalys med hjälp av SolidWorks. Material valdes, där dessa val baserades på projektets kravspecifikation. Slutligen renderades konstruktionsunderlaget i programmet KeyShot.

  • 94.
    Jawad, Mohammed
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Konstruktionsförslag för lastanordning till likbil2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 95.
    Jawad, Mohammed Ali Hassan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Optimeringsförslag av bågform och tjocklek i stenbro2022Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Stenbroar är konstruktioner som har byggts under flera millenier, men hur bestämdes egentligen formerna på dessa broar och vilka faktorer analyseras? Målet med detta projekt är att hitta den optimala formen på bågen och optimera möjliga variabler. Formerna på broar analyserades och ett centralt begrepp dök upp, nämligen thrustline. Thrustline är en linje som bär och överför laster i ren kompression. Enligt studien visade det sig att thrustline linjen motsvarar en kedjelinje. Genom elasticitetsteori härleddes thrustline ekvationen och blev röda tråden genom projektet, där allting kretsar sig runt begreppet. Ekvationer illustrerades med hjälp av grafer och figurer. Arkadiko och Alcantara, två urgamla men aktiva broar användes som underlag för projektet. Thrustline för respektive broar räknades fram och analyserades med hjälp av kända och extrapolerade dimensioner. Under analysen togs beslutet att optimera tjockleken för bågarna, först obelastade bågar och sedan med tillagd belastning. För att åstadkomma värden på bågarnas tjocklek var det nödvändigt att räkna fram normalkrafter som var som störst längst ned vid markytan och även vinklar vid thrustline-kurvornas skärningspunkter längst markytan. Tjocklekarna som togs fram motsvarade en tusendel av de befintliga måtten på bågarna.

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  • 96.
    Jiang, Yan
    et al.
    Stockholm University, Stockholm.
    Deiana, Luca
    Stockholm University, Stockholm.
    Zhang, Keihang
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Lin, Shuangzheng
    Stockholm University, Stockholm.
    Córdova, Armando
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Total Asymmetric Synthesis of Quinine, Quinidine, and Analogues via Catalytic Enantioselective Cascade Transformations2019In: European Journal of Organic Chemistry, ISSN 1434-193X, E-ISSN 1099-0690, no 35, p. 6016-6023Article in journal (Refereed)
    Abstract [en]

    A catalytic asymmetric strategy for the total synthesis of quinuclidine natural products, which includes the completed enantioselective synthesis of the classical targets quinine and quinidine is disclosed. It is based on catalytic asymmetric cascade transformations, which paves the road for the synthesis of both enantiomers of the crucial C4 stereocenter with high enantioselectivity (up to 99 % ee) in one pot. Next, developing a route to all possible stereoisomers of a common early-stage intermediate sets the stage for the total synthesis of different enantiomers or epimers of quinine, quinidine and analogues with high selectivity. 

  • 97.
    Jiang, Yuting
    et al.
    Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing; University of Chinese Academy of Sciences, Beijing.
    Wang, Yang
    Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing .
    Wu, Heting
    Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing;University of Chinese Academy of Sciences, Beijing .
    Wang, Yuanhao
    Chinese Academy of Sciences, Urumqi, Xinjiang.
    Zhang, Renyun
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Olin, Håkan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Yang, Ya
    Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing;University of Chinese Academy of Sciences, Beijing; Guangxi University, Nanning.
    Laser-Etched Stretchable Graphene–Polymer Composite Array for Sensitive Strain and Viscosity Sensors2019In: Nano-Micro Letters, ISSN 2150-5551, Vol. 11, no 1, article id 99Article in journal (Refereed)
    Abstract [en]

    The ability to control surface wettability and liquid spreading on textured surfaces is of interest for extensive applications. Soft materials have prominent advantages for producing the smart coatings with multiple functions for strain sensing. Here, we report a simple method to prepare flexible hydrophobic smart coatings using graphene–polymer films. Arrays of individual patterns in the films were created by laser engraving and controlled the contact angle of small drops by pinning the contact lines in a horizontal tensile range of 0–200%. By means of experiments and model, we demonstrate that the ductility of drops is relied on the height-to-spacing ratio of the individual pattern and the intrinsic contact angle. Moreover, the change of drop size was utilized to measure the applied strain and liquid viscosity, enabling a strain sensitivity as high as 1068 μm2/%. The proposed laser-etched stretchable graphene–polymer composite has potential applications in DNA microarrays, biological assays, soft robots, and so on.

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  • 98.
    Johansson, Anders
    et al.
    Mid Sweden University, Faculty of Human Sciences, Department of Humanities and Social Sciences.
    Jonsson, Bengt-Gunnar
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Nyhlén, Sara
    Mid Sweden University, Faculty of Human Sciences, Department of Humanities and Social Sciences.
    Att byta bulle mot sockerkaka. En interdisciplinär fikastund om kultur och hållbarhet2020In: Kulturell hållbarhet – vad är det?: Om begreppets innehåll, användning och vetenskapliga relevans / [ed] Peter Degerman, Katarina Giritli Nygren & Sara Nyhlén, Göteborg: Makadam Förlag, 2020Chapter in book (Refereed)
  • 99.
    Johansson, Catrin
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Media and Communication Science.
    Nilsson, Hans-ErikMid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.Öhman, PeterMid Sweden University, Faculty of Human Sciences, Department of Economics, Geography, Law and Tourism.Jonsson, Bengt-GunnarMid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.Engberg, Birgitta A.Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.Englund, OskarMid Sweden University, Faculty of Science, Technology and Media, Department of Ecotechnology and Suistainable Building Engineering.Simonsson, PerAxbrink, IngerMid Sweden University.
    Skogens värden: forskares reflektioner2022Collection (editor) (Other academic)
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  • 100.
    Johansson, Erik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Produktutveckling av tillbehör för bandsågverk: Utveckling av tillbehör för minskad förslitning av sågblad2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Rapporten presenterar ett utvecklingsprojekt utfört för Logosol AB i Härnösand. Projektet innefattar produktutveckling av ett tillbehör för bandsågverk B1001, där syftet var att förlänga livslängden på bandsågverkets såg-blad. Betydande del av förslitningen på sågbladen förekommer genom att föroreningar i stockarnas bark dras med genom stocken av sågbladet, detta medför sedan ökad förslitning och kortare livslängd på bandsågverkets såg-blad. Utveckling av ett tillbehör för att motverka detta grundades i att skapa en konstruktion som tar bort

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