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- Edelbro, Catrin, et al.
(författare)
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Engaging with Program Stakeholders to Support Program Development
- 2017
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Ingår i: The 13th International CDIO Conference Proceedings - Full Papers. - Calgary.
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Konferensbidrag (refereegranskat)abstract
- Luleå University of Technology (LTU) has adopted CDIO as the framework for developing its engineering programs. At the Department of Civil, Environmental and Natural Resources Engineering, there are two programs focusing on tunnelling, mining and rock excavation. Despite very positive prospects for professionals in the field, the number of students has decreased for the last two years. Further, program content might not reflect recent developments or new requirements in the industry. Therefore, the programs and their courses are taken under renewed consideration. Given the nature of the challenges facing the programs, it is in this case particularly important to inform of the planned development through a dialogue with stakeholders. Stakeholder dialogue is also a key feature of a CDIO curriculum development (CDIO Standard 2). This paper reports on a process of engagement with industry representatives, initiated through a meeting to discuss the competence of newly graduated from LTU as well as the future needs in the industry. The input will make it more visible what programme and course development work needs to be done in the nearest future. A continued support and feedback from the industry is warranted during the programme development.
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- Foyer, Pernilla, et al.
(författare)
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Behavior and cortisol responses of dogs evaluated in a standardized temperament test for military working dogs
- 2016
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Ingår i: Journal of Veterinary Behavior. - : Elsevier. - 1558-7878 .- 1878-7517. ; 11, s. 7-12
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Tidskriftsartikel (refereegranskat)abstract
- Military and police working dogs are often exposed to stressful or threatening events, and an improper response, e.g., fear, may implicate both reduced working efficiency and welfare. Therefore, identifying individuals that display a favorable response to potentially threatening situations is of great interest. In the present study, we investigated behavior responses of 85 prospective military working dogs in 4 subtests in a standardized temperament test used to select working dogs for the Swedish Armed Forces. Our goal was to evaluate behavioral responses in specific subtests and cortisol responses of candidate dogs. After dogs were rated as approved or nonapproved based on the test leader’s assessment of the full test result, we independently analyzed video recordings of 4 subtests. In addition, for 37 dogs, we analyzed pretest and posttest salivary cortisol levels. Dogs which were approved by the test leader for further training scored higher in the video recordings on emotionality and, in particular, fear-related behavior during a subset of the test and had higher levels of cortisol both before and after the test, than nonapproved dogs. Although this may actually reflect the desired traits, it could also indicate a bias in the selection procedure, which may pose limitations on the attempts to recruit the most suitable working dogs.
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- Gustavsson, Mikael, et al.
(författare)
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Transformers enable accurate prediction of acute and chronic chemical toxicity in aquatic organisms
- 2024
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Ingår i: Sciences Advances. ; 10:10
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Tidskriftsartikel (refereegranskat)abstract
- Environmental hazard assessments are reliant on toxicity data that cover multiple organism groups. Generating experimental toxicity data is, however, resource-intensive and time-consuming. Computational methods are fast and cost-efficient alternatives, but the low accuracy and narrow applicability domains have made their adaptation slow. Here, we present a AI-based model for predicting chemical toxicity. The model uses transformers to capture toxicity-specific features directly from the chemical structures and deep neural networks to predict effect concentrations. The model showed high predictive performance for all tested organism groups—algae, aquatic invertebrates and fish—and has, in comparison to commonly used QSAR methods, a larger applicability domain and a considerably lower error. When the model was trained on data with multiple effect concentrations (EC50/EC10), the performance was further improved. We conclude that deep learning and transformers have the potential to markedly advance computational prediction of chemical toxicity.
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- Hammare, Ulf, 1961-
(författare)
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Mellan löften om särart och krav på evidens : En studie av kunskap och kunskapssyn i socialt inriktade ideella, privata och offentliga organisationer
- 2013
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Between the Promise of Specificity and the Demand for Evidence – A study of knowledge and the approach to knowledge in socially oriented non-profit, private and public sector organizationsIn the social work field it is possible to identify two parallel processes in time. On the one hand a qualitative developmental process―even towards a form of standardization―where central concepts are academisation, professionalization, scientifically produced knowledge, expertise and evidence based methods. Simultaneously, there is a drive to create the conditions for increased diversity, where hopes are especially being pinned on the non-profit sector. In spite of representations and expectations concerning the non-profit sector and its so-called specificity, however, much of existing research lacks a comparative perspective, i.e., studies where non-profit organizations are related to comparable activities in the private and public sector.The aim of the study―with special focus on issues concerning evidence based knowledge in social work―is to compare and analyse whether and in that case how employee conceptions differ between the sectors, and whether and in what way non-profit employees and their activities can be said to fulfil the expectations of contributing to increased diversity. Data is from a questionnaire directed to about 1300 social work employees.The results show a greater interest in research and more marked efforts at professionalization in the public sector, while above all in the non-profit sector there was skepticism about science paired with reservations about work carried out in a professional way. In the non-profit, but also in the private sector, issues of ethics, views of humanity and values were paid greater attention. Also stressed here was the importance of creating relationships, the unique human encounter, genuine commitment, and human kindness. However, there was significant uniformity across all sectors in the use of methods, where three dominated: solution focused measures, network support/therapy, and psychosocial work.
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- Joelsson, Tove, et al.
(författare)
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The impact of sulfonation and hot-pressing of low-energy high temperature chemi-thermomecanical pulp
- 2022
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Ingår i: Holzforschung. - : Walter de Gruyter. - 0018-3830 .- 1437-434X. ; 76:5, s. 463-472
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Tidskriftsartikel (refereegranskat)abstract
- Hot-pressing high yield pulp-based paper, well above softening temperature of lignin, increases paper density and paper strength. It has been investigated whether improved paper strength can be achieved and if lower pressing temperatures can be used in combination with increased sulfonation of HTCTMP (high temperature chemi-thermomechanical pulp).Moist paper sheets from low-energy Norway Spruce HTCTMP were hot-pressed up to 270°C. Sulfite charges from 25 to 120 kg/bdt were used during impregnation, preheating, and refining at 180°C with an electric energy demand of 370–500 kWh/bdt to a shive content of 1%. The pulps were mixed with 20% bleached unrefined kraft pulp to ensure that the sheet formation would not be hampered by the coarseness of the pulps. A tensile index of 70 kNm/kg was reached with highest sulfite dosage at only 150°C in pressing temperature which can be compared to 60 kNm/kg for the corresponding market CTMP. To obtain high wet strength, the highest temperature was required, while the sulfite charge was found to be of minor importance. This study has shown that it is possible to obtain strong and wet-stable paper products from HTCTMP, having a yield of 94-96% and a low energy demand at reduced pressing temperature.
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- Joelsson, Tove, et al.
(författare)
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Unique steel belt press technology for development of high strength papers from HYP
- 2021
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Ingår i: TAPPICon Virtual 2021. - : TAPPI Press. - 9781713829683 ; , s. 523-531
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Konferensbidrag (refereegranskat)abstract
- The dry strength properties of hot pressed moist paper improved as stiff high-yield pulp (HYP) fibers soften and the sheet density increased. Very high wet strength was also achieved without adding strengthening agents. This research focuses on a new hot-pressing methodology based on a steel belt-based pilot cylinder press with infrared heating. The heated steel belt transports the moist paper into the cylinder nip with two adjacent steel rollers with adjustable nip pressure. The temperature ranges up to 300°C, maximum speed is 5 m/min, maximum pulling force from the steel belt is 70 kN and the line load in the two press nips is 15 kN/m each. High peak pressures are possible due to the hard press nip between steel rolls and steel belt, allowing a good heat transfer to the paper. The long dwell time allows strained drying of the paper which results to high density and high wet strength. Paper samples from high-yield pulps were tested at different nip pressures, temperatures and machine speeds while the dry content was kept constant at about 63%. High nip pressure showed the largest effect on densification and dry strength. While high temperature and long dwell time seem to be most important in achieving high wet strength.
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| 9. |
- Joelsson, Tove, et al.
(författare)
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Unique steel belt press technology for high strength papers from high yield pulp
- 2021
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Ingår i: SN Applied Sciences. - : Springer. - 2523-3963 .- 2523-3971. ; 3:5
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Tidskriftsartikel (refereegranskat)abstract
- The dry strength properties of hot-pressed moist paper improved as stiff high-yield pulp fibers soften and the sheet density increased. Very high wet strength was also achieved without adding strengthening agents. This research focuses on a new hot-pressing methodology based on a steel belt-based pilot cylinder press with infrared heating. The heated steel belt transports the moist paper into the cylinder nip with two adjacent steel rollers with adjustable nip pressure. The temperature ranges up to 300 °C, maximum speed is 5 m/min, maximum pulling force from the steel belt is 70 kN and the line load in the two press nips is 15 kN/m each. High peak pressures are possible due to the hard press nip between steel rolls and steel belt, allowing a good heat transfer to the paper. The long dwell time allows strained drying of the paper which results to high density and high wet strength. Paper samples from high-yield pulps were tested at different nip pressures, temperatures and machine speeds while the dry content was kept constant at about 63%. High nip pressure showed the largest effect on densification and dry strength. While high temperature and long dwell time seem to be most important in achieving high wet strength.
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