| 21. |
- Agerström, Jens, 1976-, et al.
(författare)
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Why people with an eye toward the future are more moral: The role of abstract thinking
- 2013
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Ingår i: Basic and Applied Social Psychology. - : Informa UK Limited. - 1532-4834 .- 0197-3533. ; 35:4, s. 373-381
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Tidskriftsartikel (refereegranskat)abstract
- Why do future-oriented people show greater moral concern than present-oriented people? Consistent with Construal Level Theory (CLT; Trope & Liberman, 2003), we find that future-oriented people construe morally relevant actions at a higher level of abstraction, which clarifies their larger implications. Importantly, we show that level of construal partially explains the relationship between individual differences in temporal orientation and moral judgments. These findings support CLT and contribute to our understanding of moral psychology, as they are the first to show how individual differences pertaining to psychological distance relate to abstract thinking and moral judgments.
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| 22. |
- Agevall, Lena, et al.
(författare)
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Albert O. Hisrchmans liv och verk
- 2008
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Ingår i: Sorti eller protest. - : Arkiv Förlag, Lund. ; , s. 7-12, s. 7-12
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 23. |
- Agevall, Ola, 1970-, et al.
(författare)
-
Administratörerna : administration, kontroll och styrning vid svenska universitet och högskolor
- 2020
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Ingår i: ARKIV. Tidskrift för samhällsanalys. - Lund : Arkiv förlag & tidskrift. - 2000-6225 .- 2000-6217. ; :12, s. 7-59
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Tidskriftsartikel (refereegranskat)abstract
- Det svenska universitetssystemet har vuxit till att bli en omfattande och komplex institution. Expansionen har inte bara gällt antalet studenter, lärare och forskare utan också den administrativa ram de verkar inom och de personalkategorier som ingår däri. Men förhållandet mellan lärarkår och administratörer präglas inte sällan av misstro. I sin artikel vill Ola Agevall och Gunnar Olofsson tränga bortom parternas spontana föreställningsvärldar och se hur universitetsadministrationens sammansättning och omfång faktiskt förändrats under perioden 2001–2018. De pekar på hur tillväxten av administratörer i huvudsak håller jämna steg med tillväxten av lärare och forskare. Däremot har administratörsgruppen ändrat karaktär – vilket kommer till uttryck i vilka delar av den som ökat respektive minskat, liksom vad som hänt med gruppens utbildningsnivå och könsfördelning. Det nya mönster som etableras under perioden kan förstås som en omställning av den administrativa personalens uppgifter till att tjäna ledningarnas strävan att styra och kontrollera verksamhetens effektivitet och produktivitet. En utveckling som kan förklara ökade spänningar i förhållande till universitetslärarprofessionen. En annan möjlig implikation kan vara att det ur administratörskåren växer fram en ny profession.
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| 24. |
- Agevall, Ola, 1970-, et al.
(författare)
-
Lärare och forskare vid svenska lärosäten under 2000-talet
- 2022
-
Ingår i: Statsvetenskaplig Tidskrift. - : Fahlbeckska stiftelsen. - 0039-0747. ; 124:1, s. 69-102
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Tidskriftsartikel (refereegranskat)abstract
- The Academic Profession in Swedish Higher Education: Continuity and Change inthe New CenturyThe purpose of this article is to describe the composition and internal stratificationof the university teaching staff at Swedish higher education institutions. We showthat four fault lines shape the higher education field in the 21st century. These are,firstly, the resource hierarchies both between old and new higher education institutionsand between the fields of science, and, secondly, the prestige hierarchybetween research and teaching staff categories and between the senior lecturers’conditions of existence in the center of the system and its periphery. We argue thatit is necessary to analyze how these stratification lines have come into place to understandhow they work and interact with each other, and how they have partially reinforcedeach other, but at the same time have left room for a transformation of theuniversity teachers’ conditions across the university system.
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| 25. |
- Ahl, Matilda, et al.
(författare)
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Immune response in the eye following epileptic seizures
- 2016
-
Ingår i: Journal of Neuroinflammation. - : Springer Science and Business Media LLC. - 1742-2094. ; 13:1
-
Tidskriftsartikel (refereegranskat)abstract
- Background: Epileptic seizures are associated with an immune response in the brain. However, it is not known whether it can extend to remote areas of the brain, such as the eyes. Hence, we investigated whether epileptic seizures induce inflammation in the retina. Methods: Adult rats underwent electrically induced temporal status epilepticus, and the eyes were studied 6 h, 1, and 7 weeks later with biochemical and immunohistochemical analyses. An additional group of animals received CX3CR1 antibody intracerebroventricularly for 6 weeks after status epilepticus. Results: Biochemical analyses and immunohistochemistry revealed no increased cell death and unaltered expression of several immune-related cytokines and chemokines as well as no microglial activation, 6 h post-status epilepticus compared to non-stimulated controls. At 1 week, again, retinal cytoarchitecture appeared normal and there was no cell death or micro- or macroglial reaction, apart from a small decrease in interleukin-10. However, at 7 weeks, even if the cytoarchitecture remained normal and no ongoing cell death was detected, the numbers of microglia were increased ipsi- and contralateral to the epileptic focus. The microglia remained within the synaptic layers but often in clusters and with more processes extending into the outer nuclear layer. Morphological analyses revealed a decrease in surveying and an increase in activated microglia. In addition, increased levels of the chemokine KC/GRO and cytokine interleukin-1β were found. Furthermore, macroglial activation was noted in the inner retina. No alterations in numbers of phagocytic cells, infiltrating macrophages, or vascular pericytes were observed. Post-synaptic density-95 cluster intensity was reduced in the outer nuclear layer, reflecting seizure-induced synaptic changes without disrupted cytoarchitecture in areas with increased microglial activation. The retinal gliosis was decreased by a CX3CR1 immune modulation known to reduce gliosis within epileptic foci, suggesting a common immunological reaction. Conclusions: Our results are the first evidence that epileptic seizures induce an immune response in the retina. It has a potential to become a novel non-invasive tool for detecting brain inflammation through the eyes.
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| 26. |
- Ahl, Matilda, et al.
(författare)
-
Inflammatory reaction in the retina after focal non-convulsive status epilepticus in mice investigated with high resolution magnetic resonance and diffusion tensor imaging
- 2021
-
Ingår i: Epilepsy Research. - : Elsevier. - 0920-1211 .- 1872-6844. ; 176
-
Tidskriftsartikel (refereegranskat)abstract
- Pathophysiological consequences of focal non-convulsive status epilepticus (fNCSE) have been difficult to demonstrate in humans. In rats fNCSE pathology has been identified in the eyes. Here we evaluated the use of high-resolution 7 T structural T1-weighted magnetic resonance imaging (MRI) and 9.4 T diffusion tensor imaging (DTI) for detecting hippocampal fNCSE-induced retinal pathology ex vivo in mice. Seven weeks post-fNCSE, increased number of Iba1+ microglia were evident in the retina ipsilateral to the hemisphere with fNCSE, and morphologically more activated microglia were found in both ipsi- and contralateral retina compared to non-stimulated control mice. T1-weighted intensity measurements of the contralateral retina showed a minor increase within the outer nuclear and plexiform layers of the lateral retina. T1-weighted measurements were not performed in the ipsilateral retina due to technical difficulties. DTI fractional anisotropy(FA) values were discretely altered in the lateral part of the ipsilateral retina and unaltered in the contralateral retina. No changes were observed in the distal part of the optic nerve. The sensitivity of both imaging techniques for identifying larger retinal alteration was confirmed ex vivo in retinitis pigmentosa mice where a substantial neurodegeneration of the outer retinal layers is evident. With MR imaging a 50 % decrease in DTI FA values and significantly thinner retina in T1-weighted images were detected. We conclude that retinal pathology after fNCSE in mice is subtle and present bilaterally. High-resolution T1-weighted MRI and DTI independently did not detect the entire pathological retinal changes after fNCSE, but the combination of the two techniques indicated minor patchy structural changes.
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| 27. |
- Ahlgren, Fredrik, 1980-, et al.
(författare)
-
Auto Machine Learning for predicting Ship Fuel Consumption
- 2018
-
Ingår i: Proceedings of ECOS 2018 - the 31st International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems. - Guimarães. - 9789729959646
-
Konferensbidrag (refereegranskat)abstract
- In recent years, machine learning has evolved in a fast pace as both algorithms and computing power are constantly improving. In this study, a machine learning model for predicting the fuel oil consumption from engine data has been developed for a cruise ship operating in the Baltic Sea. The cruise ship is equipped with legacy volume flow meters and newly installed mass flow meters, as well as an extensive set of logged time series data from the machinery logging system. The model is developed using state-of-the-art Auto Machine Learning tools, which optimises both the model hyper parameters and the model selection by using genetic algorithms. To further increase the model accuracy, a pipeline of different models and pre-processing algorithms is evaluated. An extensive model trained for a certain system can be used for optimisation simulation, as well as online energy efficiency prediction. As the models automatically adapt to noisy sensor data and thus function as a watermark of the machinery system, these algorithms show a potential in predicting ship energy efficiency without installation of additional mass flow meters. All tools used in this study are Open Source tools written in Python and can be applied on board. The study shows great potential for utilising large amounts of already available sensor data for improving the accuracy of the predicted ship energy consumption.
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| 28. |
- Ahlgren, Fredrik, 1980-, et al.
(författare)
-
Predicting dynamic fuel oil consumption on ships with automated machine learning
- 2019
-
Ingår i: Innovative Solutions for Energy Transitions. - : Elsevier. ; 158, s. 6126-6131
-
Konferensbidrag (refereegranskat)abstract
- This study demonstrates a method for predicting the dynamic fuel consumption on board ships using automated machine learning algorithms, fed only with data for larger time intervals from 12 hours up to 96 hours. The machine learning algorithm trained on dynamic data from shorter time intervals of the engine features together with longer time interval data for the fuel consumption. To give the operator and ship owner real-time energy efficiency statistics, it is essential to be able to predict the dynamic fuel oil consumption. The conventional approach to getting these data is by installing additional mass flow meters, but these come with added cost and complexity. In this study, we propose a machine learning approach using auto machine learning optimisation, with already available data from the machinery logging system.
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| 29. |
- Ahlgren, Fredrik, 1980-, et al.
(författare)
-
Waste Heat Recovery in a Cruise Vessel in the Baltic Sea by Using an Organic Rankine Cycle : A Case Study
- 2015
-
Ingår i: ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. - : ASME Press. - 9780791856673 ; , s. 43392-43416
-
Konferensbidrag (refereegranskat)abstract
- Maritime transportation is a significant contributor to SOx, NOx and particle matter emissions, even though it has a quite low CO2 impact. New regulations are being enforced in special areas that limit the amount of emissions from the ships. This fact, together with the high fuel prices, is driving the marine industry towards the improvement of the energy efficiency of current ship engines and the reduction of their energy demand. Although more sophisticated and complex engine designs can improve significantly the efficiency of the energy systems in ships, waste heat recovery arises as the most influent technique for the reduction of the energy consumption. In this sense, it is estimated that around 50% of the total energy from the fuel consumed in a ship is wasted and rejected in fluid and exhaust gas streams. The primary heat sources for waste heat recovery are the engine exhaust and the engine coolant. In this work, we present a study on the integration of an organic Rankine cycle (ORC) in an existing ship, for the recovery of the main and auxiliary engines exhaust heat. Experimental data from the operating conditions of the engines on the M/S Birka Stockholm cruise ship were logged during a port-to-port cruise from Stockholm to Mariehamn over a period of time close to one month. The ship has four main engines Wärtsilä 5850 kW for propulsion, and four auxiliary engines 2760 kW used for electrical consumers. A number of six load conditions were identified depending on the vessel speed. The speed range from 12–14 knots was considered as the design condition, as it was present during more than 34% of the time. In this study, the average values of the engines exhaust temperatures and mass flow rates, for each load case, were used as inputs for a model of an ORC. The main parameters of the ORC, including working fluid and turbine configuration, were optimized based on the criteria of maximum net power output and compactness of the installation components. Results from the study showed that an ORC with internal regeneration using benzene would yield the greatest average net power output over the operating time. For this situation, the power production of the ORC would represent about 22% of the total electricity consumption on board. These data confirmed the ORC as a feasible and promising technology for the reduction of fuel consumption and CO2 emissions of existing ships.
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| 30. |
- Ahlgren, Fredrik, 1980-, et al.
(författare)
-
Waste Heat Recovery in a Cruise Vessel in the Baltic Sea by Using an Organic Rankine Cycle : A Case Study
- 2016
-
Ingår i: Journal of engineering for gas turbines and power. - : ASME Press. - 0742-4795 .- 1528-8919. ; 138:1
-
Tidskriftsartikel (refereegranskat)abstract
- Maritime transportation is a significant contributor to SOx,NOx, and particle matter (PM) emissions, and to a lesser extent, of CO2. Recently, new regulations are being enforced in special geographical areas to limit the amount of emissions from the ships. This fact, together with the high fuel prices, is driving the marine industry toward the improvement of the energy efficiency of ships. Although more sophisticated and complex engine designs can improve significantly of the energy systems on ships, waste heat recovery arises as the most effective technique for the reduction of the energy consump- tion. In this sense, it is estimated that around 50% of the total energy from the fuel con- sumed in a ship is wasted and rejected through liquid and gas streams. The primary heat sources for waste heat recovery are the engine exhaust and coolant. In this work, we present a study on the integration of an organic Rankine cycle (ORC) in an existing ship, for the recovery of the main and auxiliary engines (AE) exhaust heat. Experimental data from the engines on the cruise ship M/S Birka Stockholm were logged during a port-to- port cruise from Stockholm to Mariehamn, over a period of 4 weeks. The ship has four main engines (ME) W€artsil€ a 5850kW for propulsion, and four AE 2760kW which areused for electrical generation. Six engine load conditions were identified depending on the ship’s speed. The speed range from 12 to 14 kn was considered as the design condi- tion for the ORC, as it was present during more than 34% of the time. In this study, the average values of the engines exhaust temperatures and mass flow rates, for each load case, were used as inputs for a model of an ORC. The main parameters of the ORC, including working fluid and turbine configuration, were optimized based on the criteria of maximum net power output and compactness of the installation components. Results from the study showed that an ORC with internal regeneration using benzene as working fluid would yield the greatest average net power output over the operating time. For this situation, the power production of the ORC would represent about 22% of the total elec- tricity consumption on board. These data confirmed the ORC as a feasible and promisingtechnology for the reduction of fuel consumption and CO2 emissions of existing ships.
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