| 1. |
- Christiansen, H. H., et al.
(författare)
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The Thermal State of Permafrost in the Nordic Area during the International Polar Year 2007-2009
- 2010
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Ingår i: Permafrost and Periglacial Processes. - : Wiley. - 1099-1530 .- 1045-6740. ; 21:2, s. 156-181
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Tidskriftsartikel (refereegranskat)abstract
- This paper provides a snapshot of the permafrost thermal state in the Nordic area obtained during the International Polar Year (IPY) 2007-2009. Several intensive research campaigns were undertaken within a variety of projects in the Nordic countries to obtain this snapshot. We demonstrate for Scandinavia that both lowland permafrost in palsas and peat plateaus, and large areas of permafrost in the mountains are at temperatures close to 0 degrees C, which makes them sensitive to climatic changes. In Svalbard and northeast Greenland, and also in the highest parts of the mountains in the rest of the Nordic area, the permafrost is somewhat colder, but still only a few degrees below the freezing point. The observations presented from the network of boreholes, more than half of which were established during the IPY, provide an important baseline to assess how future predicted climatic changes may affect the permafrost thermal state in the Nordic area. Time series of active-layer thickness and permafrost temperature conditions in the Nordic area, which are generally only 10 years in length, show generally increasing active-layer depths and risings permafrost temperatures. Copyright (C) 2010 John Wiley & Sons, Ltd.
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| 2. |
- Enfors, Sven-Olof, et al.
(författare)
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Physiological responses to mixing in large scale bioreactors
- 2001
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Ingår i: Journal of Biotechnology. - 0168-1656 .- 1873-4863. ; 85:2, s. 175-185
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Tidskriftsartikel (refereegranskat)abstract
- Escherichia coli fed-batch cultivations at 22 m(3) scale were compared to corresponding laboratory scale processes and cultivations using a scale-down reactor furnished with a high-glucose concentration zone to mimic the conditions in a feed zone of the large bioreactor. Formate accumulated in the large reactor, indicating the existence of oxygen limitation zones. It is suggested that the reduced biomass yield at large scale partly is due to repeated production/reassimilation of acetate from overflow metabolism and mixed acid fermentation products due to local moving zones with oxygen limitation. The conditions that generated mixed-acid fermentation in the scale-down reactor also induced a number of stress responses, monitored by analysis of mRNA of selected stress induced genes. The stress responses were relaxed when the cells returned to the substrate limited and oxygen sufficient compartment of the reactor. Corresponding analysis in the large reactor showed that the concentration of mRNA of four stress induced genes was lowest at the sampling port most distant from the feed zone. It is assumed that repeated induction/relaxation of stress responses in a large bioreactor may contribute to altered physiological properties of the cells grown in large-scale bioreactor. Flow cytometric analysis revealed reduced damage with respect to cytoplasmic membrane potential and integrity in cells grown in the dynamic environments of the large scale reactor and the scale-down reactor.
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| 3. |
- Kilic Afsar, Özgun, et al.
(författare)
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OmniFiber : Integrated Fluidic Fiber Actuators for Weaving Movement based Interactions into the Fabric of Everyday Life'
- 2021
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Ingår i: UIST 2021 - Proceedings of the 34th Annual ACM Symposium on User Interface Software and Technology. - New York, NY, USA : Association for Computing Machinery (ACM). ; , s. 1010-1026
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Konferensbidrag (refereegranskat)abstract
- Fiber - a primitive yet ubiquitous form of material - intertwines with our bodies and surroundings, from constructing our fibrous muscles that enable our movement, to forming fabrics that intimately interface with our skin. In soft robotics and advanced materials science research, actuated fibers are gaining interest as thin, flexible materials that can morph in response to external stimuli. In this paper, we build on fluidic artificial muscles research to develop OmniFiber - a soft, line-based material system for designing movement-based interactions. We devised actuated thin (øouter < 1.8 mm) fluidic fibers with integrated soft sensors that exhibit perceivably strong forces, up to 19 N at 0.5 MPa, and a high speed of linear actuation peaking at 150mm/s. These allow to flexibly weave them into everyday tangible interactions; including on-body haptic devices for embodied learning, synchronized tangible interfaces for remote communication, and robotic crafting for expressivity. The design of such interactive capabilities is supported by OmniFiber's design space, accessible fabrication pipeline, and a fluidic I/O control system to bring omni-functional fluidic fibers to the HCI toolbox of interactive morphing materials.
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| 4. |
- Ali, M., et al.
(författare)
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Reduced photoluminescence from InGaN/GaN multiple quantum well structures following 40 MeV iodine ion irradiation
- 2009
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Ingår i: Physica. B, Condensed matter. - : Elsevier. - 0921-4526 .- 1873-2135. ; 404:23-24, s. 4925-4928
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Tidskriftsartikel (refereegranskat)abstract
- The effects following ion irradiation of GaN-based devices are still limited. Here we present data on the photoluminescence (PL) emitted from InGaN/GaN multiple quantum well (MQW) structures, which have been exposed to 40 MeV I ion irradiation. The PL is reduced as a function of applied ion fluence, with essentially no PL signal left above 1011 ions/cm2. It is observed that even the ion fluences in the 109 ions/cm2 range have a pronounced effect on the photoluminescence properties of the MQW structures. This may have consequences concerning application of InGaN/GaN MQW’s in radiation-rich environments, in addition to defect build-up during ion beam analysis.
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| 5. |
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| 6. |
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| 7. |
- Beck, Ingela, et al.
(författare)
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Palliativ omvårdnad i sjuksköterskeutbildningar
- 2023
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Konferensbidrag (populärvet., debatt m.m.)abstract
- Kartläggning av palliativ vård i sjuksköterskeutbildningar i Sverige. Utveckling av kunskapsbeskrivning om allmän palliativ vård för legitimerad sjuksköterska. Utveckling och testning av en flexibel modell för färdighetsträning i samtal på personcentreradgrund om känslomässiga och existentiella aspekter
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| 8. |
- Bjorkman, H, et al.
(författare)
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Diamond microchips for fast chromatography of proteins
- 2001
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Ingår i: SENSORS AND ACTUATORS B-CHEMICAL. - 0925-4005. ; 79:1, s. 71-77
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Tidskriftsartikel (refereegranskat)abstract
- As a material for bioanalysis polycrystalline diamond surfaces have attractive characteristics, such as the highest thermal conductivity, optical transparency, chemical inertness, and by choice, electrical insulation or semiconduction. In addition, diamon
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| 9. |
- Bjorkman, H, et al.
(författare)
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Diamond microstructures for optical micro electromechanical systems
- 1999
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Ingår i: SENSORS AND ACTUATORS A-PHYSICAL. - 0924-4247. ; 78:1, s. 41-47
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Tidskriftsartikel (refereegranskat)abstract
- We have used hot filament chemical vapour deposition (HFCVD) to fabricate diamond microstructure components for optical micro electromechanical systems (MEMS). In order to demonstrate the wide application range for diamond technology we have made componen
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| 10. |
- Bjorkman, H, et al.
(författare)
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Diamond replicas from microstructured silicon masters
- 1999
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Ingår i: SENSORS AND ACTUATORS A-PHYSICAL. - 0924-4247. ; 73:1-2, s. 24-29
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Tidskriftsartikel (refereegranskat)abstract
- We are developing a microstructure technology for thick film diamond replicas, using deposition by hot filament chemical vapour deposition (CVD) on microstructured silicon. This technology is primarily intended to make micromechanical structures for micro
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