1. |
- Granlund, Alexander, et al.
(author)
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The Influence of Module Tilt on Snow Shadowing of Frameless Bifacial Modules
- 2019
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Conference paper (other academic/artistic)abstract
- In this study, frameless bifacial modules’ performance in a boreal climate is examined, with a focus on snow coverage and snow clearance for different module tilt angles. A group of ten bifacial modules at different tilt angles located in northern Sweden at latitude 65°N were studied during the first months of 2019. It was shown that modules mounted at 0 and 15° tilt was covered the most by snow and 80 and 90° the least. All other modules, mounted at 25-70° tilt, showed mostly similar results in snow coverage and removal. All modules were subjected to snow coverage from January to March. In January no considerable energy output was observed for any module. In February and March modules with tilt angles of 0 and 15° had a lower energy output than the other modules, for which no considerable differences were observed. In April, when no snow coverage occurred, the module mounted at 45° had the largest energy output and in May, 25-35° performed the best. For the entire period of January-May the modules at 35-45° output the most energy.
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2. |
- Juhas, Mario, et al.
(author)
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In vitro activity of apramycin against multidrug-, carbapenem- and aminoglycoside-resistant Enterobacteriaceae and Acinetobacter baumannii
- 2019
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In: Journal of Antimicrobial Chemotherapy. - : OXFORD UNIV PRESS. - 0305-7453 .- 1460-2091. ; 74:4, s. 944-952
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Journal article (peer-reviewed)abstract
- Objectives: Widespread antimicrobial resistance often limits the availability of therapeutic options to only a few last-resort drugs that are themselves challenged by emerging resistance and adverse side effects. Apramycin, an aminoglycoside antibiotic, has a unique chemical structure that evades almost all resistance mechanisms including the RNA methyltransferases frequently encountered in carbapenemase-producing clinical isolates. This study evaluates the in vitro activity of apramycin against multidrug-, carbapenem- and aminoglycoside-resistant Enterobacteriaceae and Acinetobacter baumannii, and provides a rationale for its superior antibacterial activity in the presence of aminoglycoside resistance determinants.Methods: A thorough antibacterial assessment of apramycin with 1232 clinical isolates from Europe, Asia, Africa and South America was performed by standard CLSI broth microdilution testing. WGS and susceptibility testing with an engineered panel of aminoglycoside resistance-conferring determinants were used to provide a mechanistic rationale for the breadth of apramycin activity.Results: MIC distributions and MIC90 values demonstrated broad antibacterial activity of apramycin against Escherichia coli, Klebsiella pneumoniae, Enterobacter spp., Morganella morganii, Citrobacter freundii, Providencia spp., Proteus mirabilis, Serratia marcescens and A. baumannii. Genotypic analysis revealed the variety of aminoglycoside-modifying enzymes and rRNA methyltransferases that rendered a remarkable proportion of clinical isolates resistant to standard-of-care aminoglycosides, but not to apramycin. Screening a panel of engineered strains each with a single well-defined resistance mechanism further demonstrated a lack of cross-resistance to gentamicin, amikacin, tobramycin and plazomicin.Conclusions: Its superior breadth of activity renders apramycin a promising drug candidate for the treatment of systemic Gram-negative infections that are resistant to treatment with other aminoglycoside antibiotics.
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3. |
- Petersson, Anna Malou, et al.
(author)
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Developing an ideation method to be used in cross-functional inter-organizational teams by means of action design research
- 2018
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In: Research in Engineering Design. - : Springer. - 0934-9839 .- 1435-6066. ; 29:3, s. 433-457
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Journal article (peer-reviewed)abstract
- Using ideation methods in an optimal way has a great potential to increase the number of ideas which a team can contribute during the conceptual phase of product development in industry. Previous studies on ideation methods have been mainly statistical studies in a laboratory setting. In the present study, however, the aim was to develop tailor-made ideation methods in a specific context, among actors on a deregulated railway market, through close interaction between researchers and engineers in a real-world context. Considering previous relevant research on ideation methods, associative memory models and the findings from tests of established ideation methods performed in the same group, a number of preliminary design principles were formulated and implemented in an ideation method that combines individual phases of rotational and gallery viewing with phases of verbal group interaction. The method was tested and refined in a cross-functional inter-organizational group comprising participants from different actors in the railway sector. Besides its provision of qualitative and quantitative test results, the present study has considered the opinions of the participants in detail, which can give important insights into the factors determining whether such a method will be implemented in industry. The participants found the method to be more useful and to generate more ideas that could be used in practice compared to the established ideation methods which they had tried. The learning derived from the specific case was formalized into a number of design principles for ideation methods to be used in cross-functional inter-organizational groups.
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4. |
- Björnsson Hallgren, Hanna C, et al.
(author)
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Specific exercises for subacromial pain : Good results maintained for 5 years
- 2017
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In: Acta Orthopaedica. - : Taylor & Francis. - 1745-3674 .- 1745-3682. ; 88:6, s. 600-605
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Journal article (peer-reviewed)abstract
- Background and purpose — We have previously shown that specific exercises reduced the need for surgery in subacromial painpatients at 1-year follow-up. We have now investigated whetherthis result was maintained after 5 years and compared the outcomesof surgery and non-surgical treatment.Patients and methods — 97 patients were included in the previouslyreported randomized study of patients on a waiting list forsurgery. These patients were randomized to specifi c or unspecifi cexercises. After 3 months of exercises the patients were asked ifthey still wanted surgery and this was also assessed at the present5-year follow-up. The 1-year assessment included Constant–Murley score, DASH, VAS at night, rest and activity, EQ-5D, andEQ-VAS. All these outcome assessments were repeated after 5years in 91 of the patients.Results — At the 5-year follow-up more patients in the specifi cexercise group had declined surgery, 33 of 47 as compared with16 of 44 (p = 0.001) in the unspecifi c exercise group. The meanConstant–Murley score continued to improve between the 1- and5-year follow-ups in both surgically and non-surgically treatedgroups. On a group level there was no clinically relevant changebetween 1 and 5 years in any of the other outcome measuresregardless of treatment.Interpretation — This 5-year follow-up of a previously publishedrandomized controlled trial found that specifi c exercisesreduced the need for surgery in patients with subacromial pain.Patients not responding to specifi c exercises may achieve similargood results with surgery. These fi ndings emphasize that a specifi cexercise program may serve as a selection tool for surgery.
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5. |
- Petersson, Anna Malou
(author)
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Collaborative conceptual design methods in the context of the Swedish deregulated railway market : From the perspectives of maintenance, infrastructure management, product provision, and research
- 2017
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Doctoral thesis (other academic/artistic)abstract
- As a result of the deregulation of the Swedish railway market, the differentfunctions involved during the life cycle of railway products have been spreadout over different actors. The trigger for the work presented in this thesis wasthe insight that, since function-specific knowledge of the railway in Swedenbelongs to different organizations, special efforts would be needed to achieve aholistic picture of a railway product during the conceptual design phase. However,there is a lack of methods developed for groups with participants fromdifferent organizations possessing different functional knowledge about a product.The overall aim of the research for this thesis was therefore to develop anideation method and a concept selection method specifically for groups actingin the context of the Swedish deregulated railway market, with members fromdifferent organizations with different functional knowledge. By means of actiondesign research, the methods were developed within the scope of a researchproject involving four different actors on the Swedish railway market.The project group tested Method 635, the gallery method and the SIL method.Overall, the gallery method was most popular and the SIL method leastpopular among the participants. Method 635 was found to have a considerablyhigher idea and concept generation rate than the gallery and SIL methods.The developed ideation method combines the rotational viewing of generatedideas in the group and gallery viewing with steps of verbal interaction wherethe group members take turns to present and comment on generated ideas. Theproject group regarded the developed method as the best method of all themethods which they had tried, and it outperformed the other methods with regardto the total number of generated concepts and ideas. The views of the projectgroup on the method correlated positively to the views of participants takingpart in field tests of the method.The developed concept selection method combines refined versions of theprocedures for topic clarification, goal specification, requirement specificationand concept screening developed by Pahl and Beitz with a concept scoring procedurebased on the life cycle and societal costs associated with each conceptthat fulfils the stated requirements.The most important effect of the composition of the group was found to bethe wide range of viewpoints on the topic at hand that the representative groupof different relevant actors was able to provide.
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6. |
- Petersson, Anna Malou, et al.
(author)
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Ideation methods applied in a cross-functional inter-organizational group : an exploratory case study from the railway sector
- 2017
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In: Research in Engineering Design. - : Springer. - 0934-9839 .- 1435-6066. ; 28:1, s. 71-97
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Journal article (peer-reviewed)abstract
- The conceptual design phase is a critical step, since it influences the subsequent steps during product development with regard to cost, quality and performance. Previous research has focused on cross-functional teams within an organization. However, many product development projects benefit from the participation of members from different organizations, not least during the conceptual design phase of technical products, where it is essential to consider different aspects of the product-to-be. Therefore, we conducted an in-depth case study of a cross-functional inter-organizational group testing ideation methods in a real-life setting within a development project in the railway sector. The group comprised participants from an infrastructure manager, a supplier, a maintenance contractor and research bodies. The tested ideation methods were Method 635, the gallery method and the SIL method. The participants found working in a cross-functional inter-organizational group to be beneficial both during the group-analysis of the topics and during the generation of ideas on how to address the ideation topic. Applying the ideation methods to the ideation topics facilitated the sharing of information between participants, and the diversity of the group manifested itself in several ways during ideation. Overall, the gallery method was most popular, and the SIL method was least popular among the participants.
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7. |
- Petersson, Anna, et al.
(author)
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Urban cemetery animals : An exploration of animals’ place in the human cemetery
- 2017
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In: Mortality. - : Taylor & Francis. - 1357-6275 .- 1469-9885. ; , s. 1-18
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Journal article (peer-reviewed)abstract
- This paper investigates the place of animals in the contemporary Swedish human cemetery. It does this by looking at how animals are admitted to cemeteries – alive and dead, above and below ground, physically as well as symbolically. The aim is to shed light on the various ways that animals are experienced and treated in the cemetery, and to explore how this both reflects our changing attitudes to animals and our changing attitudes to death. The paper draws on the findings from a qualitative interview study carried out at the Eastern Cemetery in Malmö, Sweden, and a follow-up study of a turtle pond, in Malmö-Limhamn Cemetery. Two different perspectives relating to animals in the cemetery were common to these studies: (1) the liminal role of the companion animal; and (2) aesthetics and care in relation to wild and domesticated animals. The two perspectives, considered as findings in their own right, are used in this paper as a foundation for discussing questions relating to how urban cemetery animals can enrich the cemetery environment and increase the importance of urban cemeteries today and in the future.
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8. |
- Petersson, Anna Malou, et al.
(author)
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Applying action design research (ADR) to develop concept generation and selection methods
- 2016
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In: Procedia CIRP. - : Elsevier BV. - 2212-8271 .- 2212-8271. ; 50, s. 222-227
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Journal article (peer-reviewed)abstract
- During conceptual design, concept generation and selection methods can be used to facilitate the generation of new ideas and the selection of the most promising suggestions. The present paper is an effort to understand better how action design research can be utilized to develop such methods. Using action design research, methods were developed through iterative cycles of building, testing and evaluation in the context of a deregulated railway market, through a close collaboration between actors from industry, a government agency and academia. The approach was found to be feasible and to provide generalization of the context-specific findings through the formulation of design principles.
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9. |
- Petersson, Anna Malou, et al.
(author)
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Evaluating an ideation method in a real-life context : A field test from the railway sector
- 2016
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In: ASME 2016 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. - New York : ASME Press. - 9780791850190
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Conference paper (peer-reviewed)abstract
- A great number of ideation methods are available to assist the engineer in the conceptual phase of product development. Previous research on idea generation suggests that, in order to understand how ideation can be successful in reality, the context must be taken into account. Therefore, evaluating promising ideation methods in the intended use setting should be an important complement to other research studies in the field of engineering design. In the present study, an ideation method which had previously been developed by the present authors in close collaboration with industry, a government agency, and academia was evaluated in a typical use setting. Testing the method in a use setting led to unexpected events and to new insights into the method. During the most ideation-intensive stage of the method, one of the groups in the use setting generated suggestions at a rate similar to that of the small representative group in which the development of the method had taken place, whereas the other three groups in the use setting had a lower suggestion generation rate. The findings indicated that the participants' views on the method correlated with those of the group which had developed the method.
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10. |
- Petersson, Anna, et al.
(author)
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Room of silence : an explorative investigation of design students’ redesign of an arena for reflection and existential meaning-making
- 2016
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In: Mortality. - United Kingdom : Informa UK Limited. - 1357-6275 .- 1469-9885. ; 21:2, s. 130-148
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Journal article (peer-reviewed)abstract
- This paper explores design students’ proposals for a redesign of the interior of a room of silence at the SUS hospital in Malmö. Reflection and existential meaning-making are discussed in relation to the material culture of design, and more specifically in relation to four different themes found among the students’ proposals: nature as common symbolic framework and salutary force; lighting creating a visual and spatial ambience for retreat; interactive objects allowing ritualised activities; and the presence and absence of religious symbols. In this paper, we argue that architecture and design more profoundly could support people with varying existential viewpoints when it comes to providing religiously and culturally shared public spaces for dealing with existentially crucial moments. We also argue for an interdisciplinary research approach to healing environments, where existential meaning-making is included in the overall discussion of the design of health care architecture.
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