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- Björk, Göran, 1956, et al.
(författare)
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Flow of Canadian Basin Deep Water in the Western Eurasian Basin of the Arctic Ocean
- 2010
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Ingår i: Deep Sea Research. - : Elsevier BV. - 0967-0637 .- 1879-0119. ; 57:4, s. 577-586
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Tidskriftsartikel (refereegranskat)abstract
- The LOMROG 2007 expedition targeted the previously unexplored southern part of the Lomonosov Ridge north of Greenland together with a section from the Morris Jesup Rise to Gakkel Ridge. The oceanographic data shows that Canadian Basin Deep Water (CBDW) passes the Lomonosov Ridge in the area of the Intra Basin close to the North Pole and then continues along the ridge towards Greenland and further along its northernmost continental slope. The CBDW is clearly evident as a salinity maximum and oxygen minimum at a depth of about 2000 m. The cross slope sections at the Amundsen Basin side of the Lomonosov Ridge and further south at the Morris Jesup Rise show a sharp frontal structure higher up in the water column between Makarov Basin water and Amundsen Basin water. The frontal structure continues upward into the Atlantic Water up to a depth of about 300 m. The observed water mass division at levels well above the ridge crest indicates a strong topographic steering of the flow and that different water masses tend to pass the ridge guided by ridge-crossing isobaths at local topographic heights and depressions. A rough scaling analysis shows that the extremely steep and sharply turning bathymetry of the Morris Jesup Rise may force the boundary current to separate and generate deep eddies.
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| 2. |
- Antoniadou-Plytaria, Kyriaki, 1989, et al.
(författare)
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Effect of Short-term and High-resolution Load Forecasting Errors on Microgrid Operation Costs
- 2022
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Ingår i: IEEE PES Innovative Smart Grid Technologies Conference Europe. - 9781665480321 ; 2022-October
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Konferensbidrag (refereegranskat)abstract
- The aim of this paper is to evaluate the effect of the load forecasting errors to the operation costs of a grid-connected microgrid. To this end, a microgrid energy scheduling optimization model was tested with deterministic and stochastic formulations under two solution approaches i.e., day-ahead and rolling horizon optimization. In total, twelve simulation test cases were designed receiving as input the forecasts provided by one of the three implemented machine learning models: linear regression, artificial neural network with backpropagation, and long short-term memory. Simulation results of the weekly operation of a real residential building (HSB Living Lab) showed no significant differences among the costs of the test cases for a daily mean absolute percentage forecast error of about 12%. These results suggest that operators of similar microgrid systems could use simplifying approaches, such as day-ahead deterministic optimization, and forecasts of similar, non-negligible accuracy without substantially affecting the microgrid's total cost as compared to the ideal case of perfect forecast. Improving the accuracy would mainly reduce the microgrid's peak power cost as shown by its 20.2% increase in comparison to the ideal case.
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| 3. |
- Backman, Ludvig J., et al.
(författare)
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Substance P reduces TNF-α-induced apoptosis in human tenocytes through NK-1 receptor stimulation
- 2014
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Ingår i: British Journal of Sports Medicine. - : BMJ Publishing Group Ltd. - 0306-3674 .- 1473-0480. ; 48:19, s. 1414-1420
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: It has been hypothesised that an upregulation of the neuropeptide substance P (SP) and its preferred receptor, the neurokinin-1 receptor (NK-1 R), is a causative factor in inducing tenocyte hypercellularity, a characteristic of tendinosis, through both proliferative and antiapoptotic stimuli. We have demonstrated earlier that SP stimulates proliferation of human tenocytes in culture.AIM: The aim of this study was to investigate whether SP can mediate an antiapoptotic effect in tumour necrosis factor-α (TNF-α)-induced apoptosis of human tenocytes in vitro.RESULTS: A majority (approximately 75%) of tenocytes in culture were immunopositive for TNF Receptor-1 and TNF Receptor-2. Exposure of the cells to TNF-α significantly decreased cell viability, as shown with crystal violet staining. TNF-α furthermore significantly increased the amount of caspase-10 and caspase-3 mRNA, as well as both BID and cleaved-poly ADP ribosome polymerase (c-PARP) protein. Incubation of SP together with TNF-α resulted in a decreased amount of BID and c-PARP, and in a reduced lactate dehydrogenase release, as compared to incubation with TNF-α alone. The SP effect was blocked with a NK-1 R inhibitor.DISCUSSION: This study shows that SP, through stimulation of the NK-1 R, has the ability to reduce TNF-α-induced apoptosis of human tenocytes. Considering that SP has previously been shown to stimulate tenocyte proliferation, the study confirms SP as a potent regulator of cell-turnover in tendon tissue, capable of stimulating hypercellularity through different mechanisms. This gives further support for the theory that the upregulated amount of SP seen in tendinosis could contribute to hypercellularity.
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| 7. |
- Eriksson, Gunilla, 1967-, et al.
(författare)
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Cultural interaction and change : a multi-isotopic approach to the Neolithization in coastal areas
- 2013
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Ingår i: World archaeology. - : Informa UK Limited. - 0043-8243 .- 1470-1375. ; 45:3, s. 430-446
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Tidskriftsartikel (refereegranskat)abstract
- Drawing on data from the megalithic tomb in Resmo on oland in the Baltic Sea, we use a multi-isotopic approach, involving the systematic treatment and modelling of extensive human and faunal isotopic data (C-14, C-13, N-15, S-34 and Sr-87/Sr-86), along with archaeological contextual evidence, to study change and interaction. The fact that people utilize aquatic resources necessitates modelling of the sulphur and strontium isotope data, to prevent the aquatic contribution from obscuring the local terrestrial signal. It was possible to demonstrate how the people buried in Resmo went through dynamic changes in diet, mobility patterns and cultural identity during more than two millennia of burial practice: from the incipient farmers of the Funnel Beaker Culture, through the cultural encounters and transitions during the Middle Neolithic, to the newcomers furthering intensified agriculture, trade and metal craftsmanship during the Bronze Age.
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| 8. |
- Eriksson, Johan, et al.
(författare)
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Political Utilization of Scholarly Ideas : “The Clash of Civilizations” vs. “Soft Power” in US Foreign Policy
- 2011
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Ingår i: Review of International Studies. - 0260-2105 .- 1469-9044. ; 37:1, s. 417-436
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Tidskriftsartikel (refereegranskat)abstract
- This article discusses how and under what conditions ideas coming from International Relations (IR) scholarship are used in foreign policy. We argue that the focus on policy relevance, which dominates the IR literature on the research-policy interface, is limited. Focusing instead on political utilisation highlights types and mechanisms of political impact, which are overlooked in studies on policy relevance. The fruitfulness of this change in focus is showed in an analysis of how Samuel Huntington's ‘clash of civilizations’ notion and Joseph Nye's ‘soft power’ concept have been used in US foreign policy. George W. Bush's explicit critique and reframing of ‘the clash’ thesis should not be interpreted as absence of impact, but as a significant symbolic utilisation, which has helped legitimate US foreign policy. Likewise, in the few instances in which the notion of ‘soft power’ has been used explicitly, it has played a conceptual and symbolical rather than instrumental role. More generally, this article argues that accessible framing and paradigm compatibility are essential for political utilisation of ideas.
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| 10. |
- Eriksson, Kalle, 1991-
(författare)
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Politicising automation : ideas on work, technology, and agency in the Swedish political debate
- 2024
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Over the last decade, rapid advancements in artificial intelligence and other automation technologies have sparked extensive and sometimes heated debates over the wider societal impacts of ongoing technological shifts. Even if there is wide agreement that policymaking will play a crucial role for how the future of automation will unfold, these debates tend to emphasise the technical and economic aspects of labour automation while largely overlooking its inherently political dimensions. In recent years, critical scholars within the social sciences have sought to challenge this narrow focus by bringing attention to the various biased effects that automation processes give rise to in terms of justice and power, but automation of labour as a political issue in and of itself remains underexplored. Given the broad acknowledgement of the importance of policymaking, what is especially needed is an increased understanding of how policymakers themselves interpret this issue, as well as their own roles in relation to it. This thesis aims to narrow this knowledge gap by examining the manifest and latent political ideas that underpin the ways in which Swedish policymakers interpret and negotiate the issue of automation, to thereby gain a fuller understanding of what key values that are at stake in the Swedish automation debate. To do so, an ideational analysis has been conducted using parliamentary documents, media and party texts, as well as semi-structured interviews with policymakers as data.The analysis shows that while Swedish policymakers generally perceive automation of labour as a non-contentious issue in Swedish politics, their ideas on the matter are informed by underlying normative and empirical assumptions that lead to conflicting conclusions regarding both the desirability of increased automation and the roles of policymaking for governing the technologies in question. The analysis also finds that actors’ views on automation are tightly connected to their views on a range of related, more fundamental, political issues – such as the character and values of human labour, and the role of the state in relation to the market. Since these related issues are indeed quite ideologically polarising in the Swedish context, the findings indicate that also automation is a more polarising issue than many policymakers perceive it to be. In other words, while the issue has yet to cause any explicit political conflicts in the Swedish debate, the identified disparities and ideational tensions clearly suggest that automation is not merely a technological inevitability but a complex, politically charged arena where different, if often latent, visions of the future contend.Thus, the portrayal of automation as a politically neutral phenomenon risks obscuring its inherently contestable character and preventing the critical ideological debates that therefore ought to surround it. By bringing our attention to the different and sometimes conflicting political ideas that automation is subject to, the thesis aims to contribute to a more politicised automation debate in which said ideas are not shied away from but openly contested and deliberated over. Such a debate would not only be more democratic, but also more likely to realise some of the unprecedented opportunities that automation technologies grant us.
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