| 1. |
- Andersson, Jennie, et al.
(författare)
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Design as Information : How May Design and Information Relate?
- 2009
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Ingår i: Design Principles and Practices. - : Common Ground Publishing. - 1833-1874. ; 3:4, s. 161-172
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Tidskriftsartikel (refereegranskat)abstract
- According to Pettersson, design may be a process and/or the result of the process, a product. The area of design is multidisciplinary and involves several notions. One is in the subject field of Information Design, which includes language, communication, art, cognition and information science. These disciplines refer to the concept of information differently. There is therefore a need for a fruitful theory of information, terms and concepts in order to enrich the reasoning of design as information. Bates presents a definition of information and several fundamental information forms. There, she offers a theoretical framework, the main core of which is that information may take different forms related to architecture, graphic design, interior design, and interface design, etc. Such a framework may contribute to understanding the meaning of design. Bates’ theory is applied in a study involving spatial design in industrial environments. The conclusions of the study illustrates how design and information relate to a design process and a design product that enriches the understanding of the meaning of design.
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| 2. |
- Andersson Trojer, Markus, 1981, et al.
(författare)
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Directed self-assembly of silica nanoparticles in ionic liquid-spun cellulose fibers
- 2019
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Ingår i: Journal of Colloid and Interface Science. - : Elsevier BV. - 1095-7103 .- 0021-9797. ; 553, s. 167-176
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Tidskriftsartikel (refereegranskat)abstract
- The application range of man-made cellulosic fibers is limited by the absence of cost- and manufacturing-efficient strategies for anisotropic hierarchical functionalization. Overcoming these bottlenecks is therefore pivotal in the pursuit of a future bio-based economy. Here, we demonstrate that colloidal silica nanoparticles (NPs), which are cheap, biocompatible and easy to chemically modify, enable the control of the cross-sectional morphology and surface topography of ionic liquid-spun cellulose fibers. These properties are tailored by the silica NPs’ surface chemistry and their entry point during the wet-spinning process (dope solution DSiO2 or coagulation bath CSiO2). For CSiO2-modified fibers, the coagulation mitigator dimethylsulphoxide allows for controlling the surface topography and the amalgamation of the silica NPs into the fiber matrix. For dope-modified fibers, we hypothesize that cellulose chains act as seeds for directed silica NP self-assembly. This results for DSiO2 in discrete micron-sized rods, homogeneously distributed throughout the fiber and for glycidoxy-surface modified DSiO2@GLYEO in nano-sized surface aggregates and a cross-sectional core-shell fiber morphology. Furthermore, the dope-modified fibers display outstanding strength and toughness, which are both characteristic features of biological biocomposites.
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| 3. |
- Marcus, Carina, et al.
(författare)
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Balancing the radar and long wavelength infrared signature properties in concept analysis of combat aircraft – A proof of concept
- 2017
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Ingår i: Aerospace Science and Technology. - : Elsevier BV. - 1270-9638 .- 1626-3219. ; 71, s. 733-741
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Tidskriftsartikel (refereegranskat)abstract
- Designing combat aircraft with high military effectiveness, affordability and military suitability requires balancing the efforts of many engineering disciplines during all phases of the development. One particular challenge is aircraft survivability, the aircraft's ability to avoid or withstand hostile actions. Signature management is one way of increasing the survivability by improving the ability to avoid detection. Here, the long-wave infrared and radar signatures are studied simultaneously in a mission context. By establishing a system of systems approach at mission system level, the risk of sub optimization at a technical level is greatly reduced. A relevant scenario is presented where the aim is to incapacitate an air-defense system using three different tactics: A low-altitude cruise missile option, a low and medium altitude combat aircraft option. The technical sub-models, i.e. the properties of the signatures, the weapons and the sensors are modeled to a level suitable for early concept development. The results from the scenario simulations are useful for a relative comparison of properties. Depending on the situation, first detection is made by either radar or infrared sensors. Although the modeling is basic, the complexity of the infrared signature and detection chain is demonstrated and possible pivot points for the balancing of radar and IR signature requirements are identified. The evaluation methodology can be used for qualitative evaluation of aircraft concepts at different design phases, provided that the technical models are adapted to a suitable level of detail.
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| 6. |
- Andersson, Johanna, et al.
(författare)
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Klimateffekter av återbrukade byggprodukter och möbler : Metoder för värdering av klimateffekter samt produkter vid mellanlagring och försäljning
- 2022
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Rapport (refereegranskat)abstract
- Denna rapport är skriven på uppdrag av Stockholm stad och är en del av Stockholm stads arbete i EU-projektet ”Dramatically Reducing Embodied Carbon in Europe’s built environment”, som främjar ett brett antagande av ambitiösa lokala, nationella och regional politik som kommer att minska växthusgasutsläpp i den byggda miljön i Europa. Stockholm Stad vill som en del i ovannämnda EU-projekt undersöka klimateffekten av återbruk av byggprodukter och möbler, kopplat till sin utredning om mellanlagringsplats – en återbrukscentral. Huvudmålet med uppdraget är att det ska ge Stockholm Stad underlag för att kunna väga klimataspekten mot andra aspekter såsom utrymme, ekonomi, efterfrågan etc. Ytterligare ett mål är att denna rapport ska ge ett underlag för att vidareutveckla stadens policydokument inom cirkularitet och klimat. I synnerhet Stockholm stads avfallsplan och Stockholm stads handlingsplan för cirkulärt byggande. Två övergripande, vanliga beräkningsmetoder för att värdera klimateffekter från återbruk har identifierats. Dessa är beräkning av; 1) klimatbesparing respektive 2) klimatpåverkan av återbruk. Valet mellan dessa beror framför allt på syftet med klimatberäkningen. Rekommendationen utifrån studiens resultat är att använda klimatbesparing som beräkningsmetod för att ta fram klimateffekter från återbruk av byggprodukter och möbler vid mellanlagring och försäljning av återbrukade produkter. Att beräkna klimatbesparing lämpar sig bra för beslutsunderlag och kommunikation genom att möjliggöra att man kan: 1) se vad som är stort och smått ur klimatbesparingssynpunkt, vilket kan hjälpa till vid prioriteringar och 2) belysa värdena av att återbruka produkter i stället för att köpa nya. Beräkning av klimatpåverkan passar å andra sidan ofta bra med olika rapporteringar som är aktuella idag, där till exempel en hel byggnad beräknas utifrån dess klimatpåverkan. Beskrivning av vald beräkningsmetod görs i detalj i denna rapport. Resultaten visar också att klimatpåverkan som kan uppstå från tre olika återbruksprocesser; lagerhållning, transport och rekonditionering, generellt är mycket lägre än den klimatbesparing man får av att undvika ett linjärt scenario (tillverkning av en ny produkt).
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| 7. |
- Andersson, Kent, et al.
(författare)
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Military utility : A proposed concept to support decision-making
- 2015
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Ingår i: Technology in society. - : Elsevier. - 0160-791X .- 1879-3274. ; 43, s. 23-32
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Tidskriftsartikel (refereegranskat)abstract
- A concept called Military Utility is proposed for the study of the use of technology in military operations. The proposed concept includes a three-level structure representing key features and their detailed components. On basic level the Military Utility of a technical system, to a military actor, in a specific context, is a compound measure of the military effectiveness, of the assessed technical system's suitability to the military capability system and of the affordability. The concept is derived through conceptual analysis and is based on related concepts used in social sciences, the military domain and Systems Engineering. It is argued that the concept has qualitative explanatory powers and can support military decision-making regarding technology in forecasts, defense planning, development, utilization and the lessons learned process. The suggested concept is expected to contribute to the development of the science of Military-Technology and to be found useful to actors related to defense.
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| 8. |
- Barkarmo, Sargon, et al.
(författare)
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Enhanced bone healing around nanohydroxyapatite-coated polyetheretherketone implants : An experimental study in rabbit bone
- 2014
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Ingår i: Journal of biomaterials applications. - : Sage Publications. - 0885-3282 .- 1530-8022. ; 29:5, s. 737-747
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Tidskriftsartikel (refereegranskat)abstract
- Objective: To investigate the bone response to threaded polyetheretherketone (PEEK) implants coated with nanohydroxyapatite. Materials and methods: A total of 39 PEEK implants were coated with nanocrystalline hydroxyapatite and 39 uncoated implants were used as controls. The implant surface was characterized by optical interferometry and scanning electron microscope. The implants were inserted in the tibia and femur of 13 rabbits. After 6 weeks of healing, quantitative and qualitative analyses were performed. Results: The test implants showed significantly higher removal torque test values compared with the control group. Histomorphometric evaluation demonstrated higher bone-to-implant contact for the test implants; however, there were no differences in bone area between the groups. Qualitative histological analyses demonstrated inflammatory cellular reactions in close vicinity of both implant surfaces. A two-cell layer of foreign body giant cells was observed irrespective of sample type. Conclusion: Our findings demonstrate that implants with a threaded design render good stability to PEEK in both coated and uncoated implants. Nanohydroxyapatite-coated PEEK implants demonstrated improved bone formation compared with uncoated controls.
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