| 1. |
- Grip, Harald
(author)
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Sweden's first forest hydrology field study 1905-1926: contemporary relevance of inherited conclusions and data from the Rokliden Hillslope
- 2015
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In: Hydrological Processes. - : Wiley. - 0885-6087 .- 1099-1085. ; 29, s. 3616-3631
-
Journal article (peer-reviewed)abstract
- During the last decades of the 19th century, a great worry arose about forest landscape paludification in Northern Sweden. This was the original impetus for forest hydrological research in Sweden, and the Swedish Institute of Experimental Forestry established the first field research site in 1905 at Rokliden, close to Pitea in North Sweden. It comprised 8.64ha located 2km down a 3-km-long gently sloping (similar to 4%), north facing Norway spruce covered till slope, interspersed with small mires. By 1931, it was concluded that paludification was not spreading across Northern Sweden at an appreciable rate. Within the Rokliden research site, 22 groundwater wells were installed and levels measured weekly until 1926. A map with 0.5m equidistance, ten vegetation classes, and soil profiles was established. Groundwater flow velocity was estimated by tracing added sodium chloride. Hydraulic conductivity was measured on undisturbed soil cores, while mechanical and chemical analyses were carried out on other samples. Groundwater was collected and analysed for dissolved compounds including oxygen. Hydrology was found important for soil types and vegetation development. The necessary profile drainage for podzol soil development was identified as vein drainage at the bedrock surface. Modern measurements in the re-established groundwater observation network and re-analysis of old data confirmed the plausibility of these original conclusions. Partial catchment area could explain rates of both groundwater level rise and recession. Revisiting this field study reveals that many issues in contemporary hillslope hydrology were already established a century ago, even though the provenance of that knowledge is not generally recognized. Copyright (c) 2014 John Wiley & Sons, Ltd.
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| 2. |
- Henriksson, Hanna, 1977-
(author)
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Development of body composition and its relationship with physical activity in healthy Swedish children : A longitudinal study until 4.5 years of age including evaluation of methods to assess physical activity and energy intake
- 2015
-
Doctoral thesis (other academic/artistic)abstract
- Childhood obesity according to the World Health Organization is one of the most serious public health challenges of the 21st century. The proportion of childhood obesity is high both globally and in Sweden. This is of great concern since obese children tend to stay obese in adulthood. In order to develop strategies to prevent early childhood obesity more knowledge is needed regarding factors explaining why children become overweight and obese. Preventive strategies require accurate and easy-to-use methods to assess physical activity in response to energy expenditure as well as energy intake in young children, but such methods are largely lacking or have shown limited accuracy. The aims of this thesis were: 1) to describe the longitudinal development of body composition from 1 week to 4.5 years of age; 2) to study relationships between measures of body composition and the physical activity level (PAL) at 1.5 and 3 years of age; 3) to evaluate if heart rate recording and movement registration using Actiheart can capture variations in total energy expenditure (TEE) and activity energy expenditure (AEE) at 1.5 and 3 years; 4) to evaluate the potential of a 7-day activity diary to assess PAL at 1.5 and 3 years of age; 5) to evaluate a new tool (TECH) using mobile phones for assessing energy intake at 3 years of age.Healthy children were investigated at 1 and 12 weeks (n=44), at 1.5 (n=44), 3 (n=33) and 4.5 (n=26) years of age. Body composition was measured using air-displacement plethysmography at 1 and 12 weeks and at 4.5 years of age. At 1.5 and 3 years, body composition, TEE, PAL and AEE were assessed using the doubly labelled water method and indirect calorimetry. Heart rate and movements were recorded using Actiheart (four days) and physical activities were registered using the 7-day diary. Energy intake was assessed using TECH during one complete 24-hour period.Average percentage of total body fat (TBF) and average fat mass index (FMI) were higher (+3 to +81 %), while fat-free mass index (FFMI) was slightly lower (-2 to -9 %), in children in the study from 12 weeks until 4.5 years of age when compared to corresponding reference values. A relationship between TBF% and PAL was found both at 1.5 and 3 years of age. At 3 years, but not at 1.5 years, this could be explained by a relationship between PAL and FFMI. Actiheart recordings explained a significant but small fraction (8%) of the variation in free-living TEE at 1.5 and 3 years, and in AEE (6 %) at 3 years, above that explained by body composition variables. At 1.5 and 3 years of age, PAL estimated by means of the activity diary using metabolic equivalent (MET) values by Ainsworth et al. was not significantly different from reference PAL, but the accuracy for individuals was low. Average energy intake assessed by TECH was not significantly different from TEE. However, the accuracy for individuals was poor.The results of this thesis suggest that 1) The higher body fatness of the children in the study compared to the corresponding reference values may indicate the presence of a secular trend in body composition development characterized by a high body fatness. 2) Body fatness might counteract physical activity at 1.5 years of age when the capacity to perform physical activity is limited, but not at 3 years of age when such a capacity has been developed. 3) Actiheart recordings explained a significant but small fraction of the variation in TEE at 1.5 and 3 years, and in AEE at 3 years of age, above that explained by body composition variables. 4) The activity diary and TECH produced mean values in agreement with reference PAL and TEE, respectively, but the accuracy for individual children was low.In conclusion, the results of this thesis suggest the presence of a secular trend in body composition development in healthy Swedish children, from infancy up to 4.5 years of age, which is characterized by a high body fatness. Methods to assess physical activity and energy intake at 1.5 and 3 years of age provided some promising results on a group level, although further research is needed to increase the accuracy of these methods in individual children.
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| 3. |
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| 4. |
- Jaradat, Omar, 1981-
(author)
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Contracts-Based Maintenance of Safety Cases
- 2018
-
Doctoral thesis (other academic/artistic)abstract
- Safety critical systems are those systems whose failure could result in loss of life, significant property damage, or damage to the environment. System safety is a major property that shall be adequately assured to avoid any severe outcomes in safety critical systems. Safety assurance should provide justified confidence that all potential risks due to system failures are either eliminated or acceptably mitigated. System developers in many domains (e.g., automotive, avionics, railways) should provide convincing arguments regarding the safe performance of their systems to a national or international regulatory authority and obtain approvals before putting the system into service. Building 'Safety cases' is a proven technique to argue about and communicate systems' safety and it has become a common practice in many safety critical system domains. System developers use safety cases to articulate claims about how systems meet their safety requirements and objectives, collect and document items of evidence, and construct a safety argument to show how the available items of evidence support the claims.Safety critical systems are evolutionary and constantly subject to preventive, perfective, corrective or adaptive changes during both the development and operational phases. Changes to any part of those systems can undermine the confidence in safety since changes can refute articulated claims about safety or challenge the supporting evidence on which this confidence relies. Hence, safety cases need to be built as living documents that should always be maintained to justify the safety status of the associated system and evolve as these systems evolve. However, building safety cases are costly since they require a significant amount of time and efforts to define the safety objectives, generate the required evidence and conclude the underlying logic behind the safety case arguments. Safety cases document highly dependent elements such as safety goals, assumptions and evidence. Seemingly minor changes may have a major impact. Changes to a system or its environment can necessitate a costly and painstaking impact analysis for systems and their safety cases. In addition, changes may require system developers to generate completely new items of evidence by repeating the verification activities. Therefore, changes can exacerbate the cost of producing and maintaining safety cases. Safety contracts have been proposed as a means for helping to manage changes. There have been works that discuss the usefulness of contracts for reusability and maintainability. However, there has been little attention on how to derive them and how exactly they can be utilised for system or safety case maintenance.The main goal of this thesis is to support the change impact analysis as a key factor to enhance the maintainability of safety cases. We focus on utilising safety contracts to achieve this goal. To address this, we study how safety contracts can support essential factors for any useful change management process, such as (1) identifying the impacted elements and those that are not impacted, (2) minimising the number of impacted safety case elements, and (3) reducing the work needed to make the impacted safety case elements valid again. The preliminary finding of our study reveals that using safety contracts can be promising to develop techniques and processes to facilitate safety case maintenance. The absence of safety case maintenance guidelines from safety standards and the lack of systematic and methodical maintenance techniques have motivated the work of this thesis. Our work is presented through a set of developed and assessed techniques, where these techniques utilise safety contracts to achieve the overall goal by various contributions. We begin by a framework for evaluation of the impact of change on safety critical systems and safety cases. Through this, we identify and highlight the most sensitive system components to a particular change. We propose new ways to associate system design elements with safety case arguments to enable traceability. How to identify and reduce the propagation of change impact is addressed subsequently. Our research also uses safety contracts to enable through-life safety assurance by monitoring and detecting any potential mismatch between the design safety assumptions and the actual behaviour of the system during its operational phase. More specifically, we use safety contracts to capture thresholds of selected safety requirements and compare them with the runtime related data (i.e., operational data) to continuously assess and evolve the safety arguments.In summary, our proposed techniques pave the way for cost-effective maintenance of safety cases upon preventive, perfective, corrective or adaptive changes in safety critical systems thus helping better decision support for change impact analysis.
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| 5. |
- Skott, Pia, 1967-
(author)
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Successful health-promoting leadership - A question of synchronisation
- 2022
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In: Health Education. - 0965-4283 .- 1758-714X. ; 122:3, s. 286-303
-
Journal article (peer-reviewed)abstract
- Purpose - The aim of this paper is to identify the role of the principal in establishing a whole school approach for health and wellbeing. Two questions are asked: (1) What do successful Swedish principals do when they take on a whole school approach? (2) How do these results relate to previous research on successful school leadership?Design/methodology/approach - This paper focuses on the complexity of organisational processes and considers the role of successful leadership in managing a whole school approach to health promotion. It presents findings from two different but interlinked projects, and draws on document studies and interviews with principals, student health team members and teachers in Sweden.Findings - This paper argues that successful school leaders are crucial in establishing a whole school approach, because of the work they do to synchronise the health-promoting activities in schools. The study identifies four aspects of coordination that need to be enacted simultaneously when leading health-promoting processes. The fifth aspect identified is that a whole school approach is not limited to the school, but the whole local school context, i.e. a synchronisation between different system levels.Originality/value - Although limited in scale, this paper reports key findings that could have practical implications for school leaders. The study suggests that successful school leadership research needs to use a health-promoting lens in order to make leadership practices health-promoting practices. It also proposes extended comparative research from different fields and contexts.
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| 6. |
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| 7. |
- Ebbestad, Jan Ove R., et al.
(author)
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Predation on bellerophontiform molluscs in the Palaeozoic
- 2009
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In: Lethaia. - : Scandinavian University Press / Universitetsforlaget AS. - 0024-1164 .- 1502-3931. ; 42:4, s. 469-485
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Journal article (peer-reviewed)abstract
- Shell repair assumed to result from failed predation is documented in 66 specimens of Ordovician-Carboniferous bellerophontiform tergomyan and gastropod molluscs to examine the relationship between the distribution and appearance of injuries, shell morphology and the internal anatomy of the molluscs, as well as the attack strategies of the presumed predators. Furthermore, the distribution of repaired injuries from failed attacks along the apertural margin as a reflection of the nature of the margin and emarginations is investigated. Bellerophontiform molluscs are ideal for this study because of their distinctive isostrophic morphology and the possibility to directly compare broad and narrow conchs with either deep or shallow medial emarginations. The results show that taxa with a deep medial emargination in the form of a slit have significantly more medial injuries than lateral ones. Near-equal frequencies of lateral and medial injuries in specimens with a shallow emargination (slit or sinus) suggest random distribution. Shell form (narrow or broad) does not exert overall control on the distribution of injuries except, perhaps, in some broad explanate shells with an insignificant medial emargination. While this suggests that it is the type of medial emargination that governs distribution of injuries in these forms, it is not clear if this is a result of passive selection due to structural geometry or preferential targeting by predators (i.e. site-specific mode of attack). Predation strategies on bellerophontiform molluscs thus seem to be dependent on the morphological features of the shells rather than their interpretation as tergomyan or gastropod.
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| 8. |
- Ebbestad, Jan Ove R., 1967-
(author)
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Sagan om ringen
- 2016
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In: Hälleflinta. - Uppsala. ; 1, s. 6-13
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Journal article (pop. science, debate, etc.)
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| 9. |
- Heldal, Ilona, 1964, et al.
(author)
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Are Two Heads Better than One? Object-focused Collaboration in Distributed Virtual Environments
- 2006
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In: 13th ACM Symposium Virtual Reality Software and Technology, VRST'06; Limassol; Cyprus; 1 November 2006 through 3 November 2006. - New York, NY, USA : ACM. - 9781595933218 ; , s. 287-296
-
Conference paper (peer-reviewed)abstract
- Under which conditions has collaboration added value over individual work? How does performance change when using different technologies? These are important questions for industry and for research. This paper addresses them for pairs versus individuals using physical objects and virtual representations for object-focused task-solving. Based upon previous research on pair's performance and experiences for collaboration in a real setting and four different distributed virtual environments (VEs), single-user experimental studies were carried out. The results show that in relation to performance, pairs working in networked CAVE technologies are superior compared to individuals, or pairs working in other distributed settings. In general, social interaction works as a facilitator for this type of task solving in networked VEs. Though, best performance was found in the real setting, with no major difference when comparing individuals versus pairs, working in VEs often were appreciated higher than working with physical objects.
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| 10. |
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| 11. |
- Hossein Khademi, S. M., et al.
(author)
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Genomic and phenotypic evolution of achromobacter xylosoxidans during chronic airway infections of patients with cystic fibrosis
- 2021
-
In: mSystems. - 2379-5077. ; 6:3
-
Journal article (peer-reviewed)abstract
- Bacterial pathogens evolve during chronic colonization of the human host by selection for pathoadaptive mutations. One of the emerging and understudied bacterial species causing chronic airway infections in patients with cystic fibrosis (CF) is Achromobacter xylosoxidans. It can establish chronic infections in patients with CF, but the genetic and phenotypic changes associated with adaptation during these infections are not completely understood. In this study, we analyzed the wholegenome sequences of 55 clinical A. xylosoxidans isolates longitudinally collected from the sputum of 6 patients with CF. Four genes encoding regulatory proteins and two intergenic regions showed convergent evolution, likely driven by positive selection for pathoadaptive mutations, across the different clones of A. xylosoxidans. Most of the evolved isolates had lower swimming motility and were resistant to multiple classes of antibiotics, while fewer of the evolved isolates had slower growth or higher biofilm production than the first isolates. Using a genome-wide association study method, we identified several putative genetic determinants of biofilm formation, motility and b-lactam resistance in this pathogen. With respect to antibiotic resistance, we discovered that a combination of mutations in pathoadaptive genes (phoQ and bigR) and two other genes encoding regulatory proteins (spoT and cpxA) were associated with increased resistance to meropenem and ceftazidime. Altogether, our results suggest that genetic changes within regulatory loci facilitate within-host adaptation of A. xylosoxidans and the emergence of adaptive phenotypes, such as antibiotic resistance or biofilm formation. IMPORTANCE A thorough understanding of bacterial pathogen adaptation is essential for the treatment of chronic bacterial infections. One unique challenge in the analysis and interpretation of genomics data is identifying the functional impact of mutations accumulated in the bacterial genome during colonization in the human host. Here, we investigated the genomic and phenotypic evolution of A. xylosoxidans in chronic airway infections of patients with CF and identified several mutations associated with the phenotypic evolution of this pathogen using genome-wide associations. Identification of phenotypes under positive selection and the associated mutations can enlighten the adaptive processes of this emerging pathogen in human infections and pave the way for novel therapeutic interventions.
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| 12. |
- Ozturkcan, Selcen, et al.
(author)
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Tedarikci-Alici Etkilesimlerinde Hizmetin Deger Yaratimi. [Services' Creation of Value in Supplier-Buyer Interactions]
- 2009
-
In: ITU Dergisi D: Muhendislik. - 1303-703X .- 1307-167X. ; 8:4, s. 3-12
-
Journal article (peer-reviewed)abstract
- Tedarik Zinciri Yönetimi (TZY), imalat, yöneylem, müşteri yönetimi ve dağıtım gibi değişik disiplinlerin ilgisini çekmiştir. Küresel tedarik, zaman ve kalite temelli rekabet, teknolojik gelişmeler ve çevresel belirsizlik unsurları sonucunda, TZY akademik araştırmalar için güncel bir başlık haline gelmiştir. Artan küresel rekabet, tedarik zinciri halkalarının birbirleri ile daha yakın koordinasyon sağlamasını ve kendilerini diğer halkaların konumlarını dikkate alarak daha iyi hizalamalarını gerektirmektedir. Bu sebeple, tedarikçi-alıcı çiftlerinin yakından incelenmesi hayati önem taşımaktadır. Fiyat bir ürünün en önemli özelliği haline dönüştükçe karlılık düşmekte, rekabet avantajı azalmaktadır, buna ek olarak bilişim teknolojilerinin tedarikçi-alıcı çiftlerinin daha yakın koordinasyonuna imkan tanımayan araçları geliştikçe, tedarikçiler ürünlerini sundukları hizmetler ile desteklemektedirler. Öyle ki, hizmet kalitesi, ürün kalitesinden daha önemli bir sipariş kazandıran olarak anılmaktadır. Ancak, hizmetler yolu ile farklılaştırma yakalanması zor bir kavramdır. Ürünlere eş- lik ederek melez ürün oluşumuna katkıda bulunan hizmetler, tedarikçilerin rekabetçiliklerini daha da geliştirebilecekleri unsurlar arasında yer almaktadır. Ancak, alıcıların hizmetlere dair öznel beklentilerinin gelişimleri ve değişkenlikleri sebebi ile tedarikçiler sunumunda bulunacakları hizmet seviyesi gereklerini öngörmekte zorlanmaktadırlar. Bu çalışmanın hedeflediği amaçlar çeşitlidir. Hizmetlerin Tedarik Zinciri Yönetimi (TZY) içerisindeki önemini ortaya koyarak, tedarikçi-alıcı etkileşimlerinde katma değer yaratabilme kabiliyetlerini ortaya koymak bu amaçlardan ilkidir. Ayrıca, tedarikçilerin alıcılarının hizmet seviyesi gereklerini belirleyebilmeleri için Snell Kanunu’ndan yararlanılarak, tedarikçilere ışık tutacak bir model geliştirmek de amaçlanmaktadır.
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| 13. |
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| 14. |
- Wilder, Jenny, 1976-, et al.
(author)
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Sweden
- 2017
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In: The Praeger International Handbook of Special Education. - : Praeger. - 9781440847264 ; , s. 104-118
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Book chapter (other academic/artistic)
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| 15. |
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| 16. |
- Abd Nikooie Pour, Mina, et al.
(author)
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Results of theOntology Alignment Evaluation Initiative 2020
- 2020
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In: Proceedings of the 15th International Workshop on Ontology Matching. - Aachen, Germany : CEUR Workshop proceedings. ; , s. 92-138
-
Conference paper (peer-reviewed)abstract
- The Ontology Alignment Evaluation Initiative (OAEI) aims at comparing ontology matching systems on precisely defined test cases. These test cases can be based on ontologies of different levels of complexity and use different evaluation modalities (e.g., blind evaluation, open evaluation, or consensus).The OAEI 2020 campaign offered 12 tracks with 36 test cases, and was attended by 19 participants. This paper is an overall presentation of that campaign.
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| 17. |
- Brasil, M. A. B., et al.
(author)
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Performance Comparison of Multi-Agent Middleware Platforms for Wireless Sensor Networks
- 2018
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In: IEEE Sensors Journal. - Piscataway, N.J. : Institute of Electrical and Electronics Engineers Inc.. - 1530-437X .- 1558-1748. ; 18:7, s. 3039-3049
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Journal article (peer-reviewed)abstract
- Despite the numerous possible applications of wireless sensor networks (WSNs), there is a key disadvantage related to the high complexity in programming WSNs, which is a result of their distributed and built-in features. To overcome this shortcoming, software agents have been identified as a suitable programming paradigm. The agent-based approach commonly uses a middleware for the execution of the software agents. In this regard, the present paper aims at comparing Java-based agent middleware platforms in their performance for the WSN application domain. Experiments were performed to analyze two versions of tracking applications, based on different agent models implemented for a given set of middleware platforms that support programming at a high-level of abstraction. The results highlight the differences in the resource consumption (CPU, memory, and energy) and in the communication overhead, providing an indication of suitability for each type of analyzed middleware, considering specific concerns while developing WSN applications. © 2001-2012 IEEE.
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| 18. |
- Feldmann, M., et al.
(author)
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Economic and durable design of composite bridges with integral abutments
- 2010
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Reports (peer-reviewed)abstract
- In the design and construction of bridges, questions of sustainability, maintenance and durability are becoming more and more important for European road administrations, in addition to safety and serviceability issues. Therefore integral abutment bridges are becoming highly attractive to designers, constructors and road administrations, as they tend to be less expensive to build, easier to maintain and more economical to own over their life time. Bearings and joints are main sources of maintenance costs during a lifetime. These costs vanish because the bridges are joint- and bearing-free. However, this very advantage complicates the design compared to conventional bridges in some crucial respects. Combined with the fact that most European countries have only limited experience with integral bridges to date, this leads to a reluctance of road administrations to use this bridge type. Thus the main objective of the project is to experimentally and theoretically investigate the behaviour of critical points of integral abutment bridges. Regarding the soil-structure interaction, recommendations are elaborated based on monitoring results as well as previous research and monitoring campaigns. Conventional HP piles and sheet piles are investigated as a foundation. Furthermore a hinged HP connection is developed to decrease the stresses in the pile system. An investigation of the design and construction of the slab to pavement approach is also carried out to avoid major damages to the structure. Finally the most important information is condensed into the essential features in form of a 'Design guide for composite bridges with integral abutments'
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| 19. |
- Giese, Martin, 1970
(author)
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Taclets and the KeY Prover
- 2004
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In: Electronic Notes in Theoretical Computer Science. - : Elsevier BV. - 1571-0661. ; 103, s. 67-79
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Journal article (peer-reviewed)abstract
- We give a short overview of the KeY prover---which is the proof system belonging to the KeY tool---from a user interface perspective. In particular, we explain the concept of taclets, which are the basic building blocks for proofs in the KeY prover.
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| 20. |
- Grimell, Jan
(author)
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Veterans, the hidden wounds of war, and soul repair
- 2018
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In: Spiritual Care. - : Walter de Gruyter. - 2365-8185 .- 2193-3804. ; 7:4, s. 353-363
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Journal article (peer-reviewed)abstract
- To better understand how deployment in war zones and/or combat may inflict emotional wounds upon veterans, researchers, clinicians, and caregivers it was recently started to focus on the concepts of moral and spiritual injuries. Such injuries may remain undiscovered during psychiatric screening for posttraumatic stress disorder. What is often missing, however, is a conceptualization of the part of the self which is implicitly related to emotional wounds caused by moral and spiritual injuries. This article utilizes a number of historical and contemporary conceptualizations of what is called the soul, and their implications for pastoral and spiritual care of emotionally wounded veterans. Moreover, it explores the use of biblical stories in pastoral and spiritual care among veterans suffering from moral and spiritual injuries.
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| 21. |
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| 22. |
- Hagstotz, Steffen, et al.
(author)
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Breaking cosmic degeneracies : Disentangling neutrinos and modified gravity with kinematic information
- 2019
-
In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 629
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Journal article (peer-reviewed)abstract
- Searches for modified gravity in the large-scale structure try to detect the enhanced amplitude of density fluctuations caused by the fifth force present in many of these theories. Neutrinos, on the other hand, suppress structure growth below their free-streaming length. Both effects take place on comparable scales, and uncertainty in the neutrino mass leads to a degeneracy with modified gravity parameters for probes that are measuring the amplitude of the matter power spectrum. We explore the possibility to break the degeneracy between modified gravity and neutrino effects in the growth of structures by considering kinematic information related to either the growth rate on large scales or the virial velocities inside of collapsed structures. In order to study the degeneracy up to fully non-linear scales, we employ a suite of N-body simulations including both f (R) modified gravity and massive neutrinos. Our results indicate that velocity information provides an excellent tool to distinguish massive neutrinos from modified gravity. Models with different values of neutrino masses and modified gravity parameters possessing a comparable matter power spectrum at a given time have different growth rates. This leaves imprints in the velocity divergence, which is therefore better suited than the amplitude of density fluctuations to tell the models apart. In such models with a power spectrum comparable to ACDM today, the growth rate is strictly enhanced. We also find the velocity dispersion of virialised clusters to be well suited to constrain deviations from general relativity without being affected by the uncertainty in the sum of neutrino masses.
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| 23. |
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| 24. |
- Hagstrand, P.-O., et al.
(author)
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Mechanical properties and morphology of flax fiber reinforced melamine-formaldehyde composites
- 2001
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In: Polymer Composites. - : Wiley. - 0272-8397 .- 1548-0569. ; 22:4, s. 568-578
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Journal article (peer-reviewed)abstract
- The mechanical performance of natural fiber reinforced polymers is often limited owing to a weak fiber-matrix interface. In contrast, melamine-formaldehyde (MF) resins are well known to have a strong adhesion to most cellulose containing materials. In this Paper, nonwoven flax fiber mat reinforced and particulate filled MF composites processed by compression molding are studied and compared to a similar MF composite reinforced with glass fibers. Using flax instead of glass fibers has a somewhat negative effect on tensile performance. However, the difference is relatively small, and if density and material cost are taken into account, flax fibers become competitive. Tensile damage is quantified from the stiffness reduction during cyclic straining. Compared to glass fibers, flax fibers generate a material with a considerably lower damage rate. From scanning electron microscopy (SEM), it is found that microcracking takes place mainly in the fiber cell walls and not at the fiber-matrix interface. This suggests that the fiber-matrix adhesion is high. The materials are also compared using dynamic mechanical thermal analysis (DMTA) and water absorption measurements
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| 25. |
- Jadaan, Taline, 1980
(author)
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The Role of Institutional Work in Platform Establishment: An Investigation of Digital Innovation Practices for Creating, Maintaining and Disrupting Institutions
- 2019
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In: Proceedings of the Annual Hawaii International Conference on System Sciences. - : IEEE. - 1530-1605. - 9780998133126
-
Conference paper (peer-reviewed)abstract
- While the significance of digital platforms for contemporary organizations has been demonstrated both in theory and practice, how they emerge is less understood. We argue that one source of digital platform emergence is the recombinatorial innovation processes individuals enact in organizational work practices. We draw on theory on institutional work to empirically examine how innovation processes led to the emergence of a digital platform in the Swedish transport administration. We find that actors engage in work aimed at creating, maintaining and disrupting socio-technical structures. These work practices involve exploring the possibilities of specific digital resources, their combinatorial options, and how new resources can be generated. The analysis contributes to the literature on digital platforms by (1) demonstrating the role of digital malleability in bypassing institutional resistance, (2) identifying temporal patterns and dependencies of activities, and (3) detecting distinct emphasis in types of institutional work.
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| 26. |
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| 27. |
- Ludvigsson, Jonas F, et al.
(author)
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Tissue Transglutaminase Auto-antibodies in Cord Blood from Children to Become Celiacs
- 2001
-
In: Scandinavian Journal of Gastroenterology. - : Informa UK Limited. - 0036-5521 .- 1502-7708. ; 36:12, s. 1279-1283
-
Journal article (peer-reviewed)abstract
- Background: Determination of tissue transglutaminase auto-antibodies (tTGAA) has been shown to be a sensitive and specific diagnostic tool for large-scale screening for celiac disease. The purpose of this study was to measure tissue tTGAA in cord blood in infants that later developed celiac disease to evaluate if this assay could serve as a predictive tool for later development of celiac disease.Methods: IgG tTGAA were analyzed in cord blood through immunoprecipitation from 51 future celiac patients and 102 age-matched controls. Cut-off level was set at 0.040.Results: No difference in tTGAA levels was found between cord blood from infants who later developed celiac disease and controls ( P = 0.746). 2/51 future celiac patients (3.9%) had levels above cut-off-value in cord blood, while 3/102 controls were positive (2.9%) ( P = 1.000). tTGAA levels were higher in the 1980s and at the beginning of the 1990s than they have been in recent years ( P = 0.003).Conclusions: Determination of tissue tTGAA in cord blood does not predict future celiac disease in children. tTGAA levels vary with time, which should be considered in retrospective studies analyzing tTGAA.
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| 28. |
- Miškovský, Karel, et al.
(author)
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Utveckling av effektiva och relevanta metoder för bedömning av bergmaterial innehållande metallförande sulfidmineral
- 2022
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Reports (other academic/artistic)abstract
- Miljöanpassad hantering av sulfidförande bergmaterial kräver relevanta undersöknings-, provtagnings- och analysmetoder för bedömning av krossproduktens eventuella negativa miljöeffekter. Det föreliggande projektets mål var att på vetenskapliga grunder framställa, utvärdera och rekommendera praktiskt tillämpbara metoder för klassificering av bergmaterialens reaktivitet relaterad till innehåll av sulfidmineral. Projektet ska också föreslå metoder för behandling av bergmaterial där negativa miljöeffekter på närmiljön kan förutses.Projektet var indelat i sex delprojekt: 1) Översiktlig klassificering av sulfidförande berggrund, 2) Anrikning av sulfidmineral i samband med produktion av olika bergmaterialprodukter, 3) Utveckling och testning av effektiva och representativa provtagnings- och provhanteringsmetoder för fast berg och krossmaterial, 4) Val av relevanta och effektiva analysmetoder, 5) Framtagning av metod för klassificering av sulfidförande bergkross samt 6) Val, testning och verifiering av hållbara metoder för neutralisering av syrabildning från sulfidoxidation.Slutrapporten innehåller en sammanställning av delprojektens resultat med en systematisk presentation av metodik för effektiv bedömning, klassificering och behandling av sulfidförande bergmaterial och krossprodukter.
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| 29. |
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| 30. |
- Omorede, Adesuwa
(author)
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Where does the spirit come from and what keeps them going : A qualitative approach to understanding the drivers for social entrepreneurship
- 2012
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Conference paper (peer-reviewed)abstract
- The present study explores the reasons that motivates why individuals start social enterprises and persist to continue with the process. Our inductive study draws upon interviews of entrepreneurs and the people involved before and/or during their entrepreneurial process. Our findings show the existence of compassionate contextual and compassionate personal reasons for why some individuals indulge in social entrepreneurial activities, it also shows other factors to why they continue in the entrepreneurial process and finally suggest that passion is important when starting and continuing with social entrepreneurship. In addition, our findings provide new insights and contribute to the field of social entrepreneurship by shedding light on drivers for social entrepreneurial engagements and activities.
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| 31. |
- Stokes, Klara, et al.
(author)
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A Survey on the Use of Combinatorial Configurations for Anonymous Database Search
- 2015
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In: Advanced Research in Data Privacy. - Cham : Springer. - 9783319098845 - 9783319098852 ; , s. 407-419
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Book chapter (peer-reviewed)abstract
- The peer-to-peer user-private information retrieval (P2P UPIR) protocol is an anonymous database search protocol in which the users collaborate in order to protect their privacy. This collaboration can be modelled by a combinatorial configuration. This chapter surveys currently available results on how to choose combinatorial configurations for P2P UPIR.
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| 32. |
- Stokes, Klara, et al.
(author)
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Associating a numerical semigroup to the triangle-free configurations
- 2011
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In: Advances in Mathematics of Communications. - : American Institute of Mathematical Sciences (AIMS). - 1930-5346 .- 1930-5338. ; 5:2, s. 351-371
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Journal article (peer-reviewed)abstract
- It is proved that a numerical semigroup can be associated to the triangle-free -configurations, and some results on existence are deduced. For example it is proved that for any there exists infinitely many -configurations. Most proofs are given from a graph theoretical point of view, in the sense that the configurations are represented by their incidence graphs. An application to private information retrieval is described.
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| 33. |
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| 34. |
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| 35. |
- Tillman, Anne-Marie, 1958, et al.
(author)
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Choice of system boundaries in life cycle assessment
- 1994
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In: Journal of Cleaner Production. - : Elsevier BV. - 0959-6526. ; 2:1, s. 21-29
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Journal article (peer-reviewed)abstract
- System boundaries in life cycle assessments (LCA) must be specified in several dimensions: boundaries between the technological system and nature, delimitations of the geographical area and time horizon considered, boundaries between production and production of capital goods and boundaries between the life cycle of the product studied and related life cycles of other products. Principles for choice of system boundaries are discussed, especially concerning the last dimension. Three methods for defining the contents of the analysed system in this respect are described: process tree, technological whole system and socio-economic whole system. The methods are described in the application's multi-output processes and cascade recycling, and examples are discussed. It is concluded that system boundaries must be relevant in relation to the purpose of an LCA, that processes outside the process tree in many cases have more influence on the result than details within the process tree, and that the different methods need to be further compared in practice and evaluated with respect to both relevance, feasibility and uncertainty.
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| 36. |
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| 37. |
- Zelic, Renata, et al.
(author)
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Estimation of Relative and Absolute Risks in a Competing-Risks Setting Using a Nested Case-Control Study Design : Example From the ProMort Study
- 2019
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In: American Journal of Epidemiology. - : Oxford University Press. - 0002-9262 .- 1476-6256. ; 188:6, s. 1165-1173
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Journal article (peer-reviewed)abstract
- In this paper, we describe the Prognostic Factors for Mortality in Prostate Cancer (ProMort) study and use it to demonstrate how the weighted likelihood method can be used in nested case-control studies to estimate both relative and absolute risks in the competing-risks setting. ProMort is a case-control study nested within the National Prostate Cancer Register (NPCR) of Sweden, comprising 1,710 men diagnosed with low- or intermediate-risk prostate cancer between 1998 and 2011 who died from prostate cancer (cases) and 1,710 matched controls. Cause-specific hazard ratios and cumulative incidence functions (CIFs) for prostate cancer death were estimated in ProMort using weighted flexible parametric models and compared with the corresponding estimates from the NPCR cohort. We further drew 1,500 random nested case-control subsamples of the NPCR cohort and quantified the bias in the hazard ratio and CIF estimates. Finally, we compared the ProMort estimates with those obtained by augmenting competing-risks cases and by augmenting both competing-risks cases and controls. The hazard ratios for prostate cancer death estimated in ProMort were comparable to those in the NPCR. The hazard ratios for dying from other causes were biased, which introduced bias in the CIFs estimated in the competing-risks setting. When augmenting both competing-risks cases and controls, the bias was reduced.
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| 38. |
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| 39. |
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| 40. |
- Zelic, Renata, et al.
(author)
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Interchangeability of light and virtual microscopy for histopathological evaluation of prostate cancer
- 2021
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In: Scientific Reports. - : Nature Publishing Group. - 2045-2322. ; 11:1
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Journal article (peer-reviewed)abstract
- Virtual microscopy (VM) holds promise to reduce subjectivity as well as intra- and inter-observer variability for the histopathological evaluation of prostate cancer. We evaluated (i) the repeatability (intra-observer agreement) and reproducibility (inter-observer agreement) of the 2014 Gleason grading system and other selected features using standard light microscopy (LM) and an internally developed VM system, and (ii) the interchangeability of LM and VM. Two uro-pathologists reviewed 413 cores from 60 Swedish men diagnosed with non-metastatic prostate cancer 1998-2014. Reviewer 1 performed two reviews using both LM and VM. Reviewer 2 performed one review using both methods. The intra- and inter-observer agreement within and between LM and VM were assessed using Cohen's kappa and Bland and Altman's limits of agreement. We found good repeatability and reproducibility for both LM and VM, as well as interchangeability between LM and VM, for primary and secondary Gleason pattern, Gleason Grade Groups, poorly formed glands, cribriform pattern and comedonecrosis but not for the percentage of Gleason pattern 4. Our findings confirm the non-inferiority of VM compared to LM. The repeatability and reproducibility of percentage of Gleason pattern 4 was poor regardless of method used warranting further investigation and improvement before it is used in clinical practice.
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