| 1. |
- Berg, Anne, 1981-, et al.
(författare)
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Begäret efter att se på historia
- 2023
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Ingår i: Historisk Tidskrift. - : Svenska Historiska Föreningen. - 0345-469X .- 2002-4827. ; 143:4, s. 501-503
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 2. |
- Berg, Anne, et al.
(författare)
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Begäret efter att se på historia
- 2023
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Ingår i: Historisk tidskrift. - : Svenska Historiska Föreningen. - 0345-469X .- 2002-4827. ; 143:4, s. 501-503
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 3. |
- Berg, Anne, 1981-, et al.
(författare)
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Behövs egentligen Historisk tidskrift?
- 2023
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Ingår i: Historisk Tidskrift. - : Svenska Historiska Föreningen. - 0345-469X .- 2002-4827. ; 143:3, s. 287-288
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 4. |
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| 5. |
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| 6. |
- Berg, Anne, 1981-, et al.
(författare)
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Redaktörerna [sic!] har ordet
- 2023
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Ingår i: Historisk Tidskrift. - : Svenska Historiska Föreningen. - 0345-469X .- 2002-4827 .- 0018-263X .- 1504-2944. ; 143:2, s. 135-136
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 7. |
- Birkhofer, Klaus, et al.
(författare)
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Long-term organic farming fosters below and aboveground biota: Implications for soil quality, biological control and productivity
- 2008
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Ingår i: Soil Biology & Biochemistry. - : Elsevier BV. - 0038-0717. ; 40:9, s. 2297-2308
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Tidskriftsartikel (refereegranskat)abstract
- Organic farming may contribute substantially to future agricultural production worldwide by improving soil quality and pest control, thereby reducing environmental impacts of conventional farming. We investigated in a comprehensive way soil chemical, as well as below and aboveground biological parameters of two organic and two conventional wheat farming systems that primarily differed in fertilization and weed management strategies. Contrast analyses identified management related differences between "herbicide-free" bioorganic (BIOORG) and biodynamic (BIODYN) systems and conventional systems with (CONFYM) or without manure (CONMIN) and herbicide application within a long-term agricultural experiment (DOK trial, Switzerland). Soil carbon content was significantly higher in systems receiving farmyard manure and concomitantly microbial biomass (fungi and bacteria) was increased. Microbial activity parameters, such as microbial basal respiration and nitrogen mineralization, showed an opposite pattern, suggesting that soil carbon in the conventional system (CONFYM) was more easily accessible to microorganisms than in organic systems. Bacterivorous nematodes and earthworms were most abundant in systems that received farmyard manure, which is in line with the responses of their potential food sources (microbes and organic matter). Mineral fertilizer application detrimentally affected enchytraeids and Diptera larvae, whereas aphids benefited. Spider abundance was favoured by organic management, most likely a response to increased prey availability from the belowground subsystem or increased weed coverage. In contrast to most soil-based, bottom-up controlled interactions, the twofold higher abundance of this generalist predator group in organic systems likely contributed to the significantly lower abundance of aboveground herbivore pests (aphids) in these systems. Long-term organic farming and the application of farmyard manure promoted soil quality, microbial biomass and fostered natural enemies and ecosystem engineers, suggesting enhanced nutrient cycling and pest control. Mineral fertilizers and herbicide application, in contrast, affected the potential for top-down control of aboveground pests negatively and reduced the organic carbon levels. Our study indicates that the use of synthetic fertilizers and herbicide application changes interactions within and between below and aboveground components, ultimately promoting negative environmental impacts of agriculture by reducing internal biological cycles and pest control. On the contrary, organic farming fosters microbial and faunal decomposers and this propagates into the aboveground system via generalist predators thereby increasing conservation biological control. However, grain and straw yields were 23% higher in systems receiving mineral fertilizers and herbicides reflecting the trade-off between productivity and environmental responsibility. (C) 2008 Elsevier Ltd. All rights reserved.
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| 8. |
- Brath, Manfred, et al.
(författare)
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Microwave and submillimeter wave scattering of oriented ice particles
- 2020
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Ingår i: Atmospheric Measurement Techniques. - : Copernicus GmbH. - 1867-1381 .- 1867-8548. ; 13:5, s. 2309-2333
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Tidskriftsartikel (refereegranskat)abstract
- Microwave (1-300GHz) dual-polarization measurements above 100GHz are so far sparse, but they consistently show polarized scattering signals of ice clouds. Existing scattering databases of realistically shaped ice crystals for microwaves and submillimeter waves (> 300GHz) typically assume total random orientation, which cannot explain the polarized signals. Conceptual models show that the polarization signals are caused by oriented ice particles. Only a few works that consider oriented ice crystals exist, but they are limited to microwaves only. Assuming azimuthally randomly oriented ice particles with a fixed but arbitrary tilt angle, we produced scattering data for two particle habits (51 hexagonal plates and 18 plate aggregates), 35 frequencies between 1 and 864GHz, and 3 temperatures (190, 230 and 270K). In general, the scattering data of azimuthally randomly oriented particles depend on the incidence angle and two scattering angles, in contrast to total random orientation, which depends on a single angle. The additional tilt angle further increases the complexity. The simulations are based on the discrete dipole approximation in combination with a self-developed orientation averaging approach. The scattering data are publicly available from Zenodo (https://doi.org/10.5281/zenodo.3463003). This effort is also an essential part of preparing for the upcoming Ice Cloud Imager (ICI) that will perform polarized observations at 243 and 664GHz. Using our scattering data radiative transfer simulations with two liquid hydrometeor species and four frozen hydrometeor species of polarized Global Precipitation Measurement (GPM) Microwave Imager (GMI) observations at 166GHz were conducted. The simulations recreate the observed polarization patterns. For slightly fluttering snow and ice particles, the simulations show polarization differences up to 11K using plate aggregates for snow, hexagonal plates for cloud ice and totally randomly oriented particles for the remaining species. Simulations using strongly fluttering hexagonal plates for snow and ice show similar polarization signals. Orientation, shape and the hydrometeor composition affect the polarization. Ignoring orientation can cause a negative bias for vertically polarized observations and a positive bias for horizontally polarized observations.
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| 9. |
- Ekelund, Robin, et al.
(författare)
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An empirical history
- 2022
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Ingår i: Historisk Tidskrift. - : SVENSKA HISTORISKA FORENINGEN. - 0345-469X .- 2002-4827. ; 142:3, s. 307-319
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Tidskriftsartikel (refereegranskat)
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| 10. |
- Ekelund, Robin
(författare)
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Connective Memory
- 2023
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Ingår i: The Palgrave Encyclopedia of Memory Studies. - : Palgrave Macmillan. - 9783030937898
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Bokkapitel (refereegranskat)abstract
- The concept of connective memory highlights how memories are shaped by connections between people, objects, media, and institutions. It derives from the growing discussions on how technological and digital developments affect contemporary memory culture and, in particular, from Andrew Hoskins’ conceptualization of a “connective turn” and a “new memory ecology.” Connective memory is both a methodological and an analytical tool as it inspires memory studies to explore memory by tracing and analyzing how different interactional trajectories intersect with and compete against each other. The concept is thusly designed to challenge ideas of “individual memories” and the binaries of individual and collective and active and passive. Even though the concept of connective memory is closely tied to technological and digital developments, it is important to note that it inspires memory research to investigate both online and offline connections. Connective memory has also been an influential concept in José van Dijck’s more wide-ranging conceptualization of a “culture of connectivity.” Her conceptualization not only engages with remembering but also deals with the connected society as a whole, and it provides a critical perspective on technology and social media platforms.
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| 11. |
- Ekelund, Robin, et al.
(författare)
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En empirisk historia [An empirical history]
- 2022
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Ingår i: Historisk Tidskrift. - : Svenska Historiska Föreningen. - 0345-469X .- 2002-4827. ; 142:3, s. 307-319
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Tidskriftsartikel (refereegranskat)
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| 12. |
- Ekelund, Robin
(författare)
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Fascination, nostalgia, and knowledge desire in digital memory culture : Emotions and mood work in retrospective Facebook groups
- 2022
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Ingår i: Memory Studies. - : SAGE Open. - 1750-6980 .- 1750-6999. ; 15:5, s. 1248-1262
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Tidskriftsartikel (refereegranskat)abstract
- This article explores how emotions are practised within retrospective Facebook groups and how these practices are shaped by the logics of the interface. Theoretical inspiration is drawn from Ahmed’s discussions on emotions and mood work and the study is based on netnographic fieldwork involving six retrospective Facebook groups. Overall, a positive emotional relationship with the past is practised and the analysis illustrates that three interrelated mood works are found in the groups; fascination, nostalgia and knowledge desire. The analysis of these indicate that Facebook’s interface directs the members towards fragmented interactions which produces a memory culture that is more focused on brief and general, rather than elaborate and specific, accounts of the past. I conclude by discussing how the emotional practices within the retrospective Facebook groups creates a double-edged sword; at the same time as they offer a sense of positive emotional belonging for likeminded members, they also risk producing simplified notions of the past that feeds into retrotopian tendencies of the present.
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| 13. |
- Ekelund, Robin
(författare)
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Historiska ting : att studera tingens roll i bruk av historia
- 2018
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Ingår i: Kulturstudier. - : Dansk Historisk Fællesråd. - 1904-5352. ; :Nr 1 2018 Temanummer om historiebrug, s. 62-80
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Tidskriftsartikel (refereegranskat)abstract
- Vilken roll fyller ting och materialiteter i bruk av historia? Och, hur kan vi som forskare undersöka tingens roll i dessa sammanhang? Med utgångspunkt i dessa frågor och med inspiration från Actor-Network-Theory intresserar sig denna artikel för ting som aktörer i bruk av historia. En etnografisk metod bestående av observationer och intervjuer lyfts fram som ett fruktbart tillvägagångssätt. Dessutom diskuteras möjliga analytiska poänger av en sådan approach. Artikeln konkluderar att ett intresse för tingens roll i bruk av historia är ett fruktbart angreppssätt för att synliggöra de komplexa och ibland motsägelsefulla meningssystem som skapas då individer och grupper brukar historia.
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| 14. |
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| 15. |
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| 16. |
- Ekelund, Robin Nils, 1989
(författare)
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A Database of Microwave Single Scattering Properties of Ice Hydrometeors
- 2018
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Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Microwave remote sensing by satellites is important for global observations of ice hydrometeors. Interpretation of the measurements requires sufficiently accurate knowledge of hydrometeors’ interaction with photons, i.e. article scattering and absorption. This presents a challenge for several reasons. Liquid hydrometeors can typically be modelled by spheroids, while the shapes of ice hydrometeors are known to be significantly more complex and variable. Also, the shapes can from a remote sensing perspective generally not be known exactly, as they vary from case to case. Finally, calculating the light scattering properties is challenging and computationally costly. This thesis presents work related to recent efforts in improving the representation of light scattering by ice hydrometeors. A new single scattering database is presented, which includes 34 frequencies in between 1 and 874 GHz, and supports both passive and active microwave applications. A total of 34 different particle models were included, ranging from pristine crystals to aggregates. Complete random orientation is assumed throughout, slightly limiting its usefulness with respect to polarimetric measurements. Most aggregates were generated through simulation of aggregation, by letting particles collide randomly. The database can be considered the most extensive of this type to date, and future versions are intended to include oriented and melting particles. The general intention is to aid existing and future satellite retrievals, and satellite data assimilation into weather prediction models, all requiring accurate modelling of measured radiances. Special attention has been given to the upcoming Ice Cloud Imager (ICI), part of Europe’s next generation of weather satellites. Using the aggregation simulation tools developed for the database, a more dedicated case study was performed, which looked at the impact of different aggregate shape parameters on the resulting scattering properties. Both the amount and aspect ratio of the aggregate constituent crystals was found to have a high impact on both extinction (183, 325 and 664 GHz) and back-scattering (13, 36 and 94 GHz). Effective density and aerodynamic area had a high impact as well. Calculated radar triple frequency signatures were seen to clearly depend on the particle shape, consistent with previous studies. Overall, the results indicate that the particle shape should be considered in both passive and active applications above 13 GHz, and future database development will consider this. A potential application is also retrieval of ice particle shape through remote sensing.
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| 17. |
- Ekelund, Robin Nils, 1989
(författare)
-
A database of single scattering properties for hydrometeors at microwave and sub-millimetre frequencies
- 2020
-
Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Remote sensing observations of hydrometeors (ice or liquid water particles) at microwave and sub-millimetre wavelengths provide important input to numerical weather forecasting through data assimilation and give insight to cloud processes that are relevant for climate prediction. The utilization of such measurements requires information on the single scattering properties (SSP), i.e., knowledge on how single hydrometeors scatter, absorb, and emit radiation. However, SSP are dependant on the particle orientation, shape, and size which in the case of ice hydrometeors are highly variable in nature. Furthermore, simulating the SSP of hydrometeors is challenging and computationally costly. These are the main challenges that this thesis aims to address. In the first study of this thesis, a new publicly available SSP database for randomly oriented ice hydrometeors was developed. In terms of covered frequencies, temperatures, sizes, and particle models it is the most extensive to date. Particle models include aggregates that were generated using a semi-realistic, stochastic aggregation simulator. The next study utilised the simulator for a more detailed investigation on the dependence of SSP upon aggregate characteristics. For instance, the size and aspect ratio of the constituent crystals were found to have a significant impact on the extinction and back-scattering cross-sections of the aggregates. The third study analysed the ability of the SSP database to reproduce a combination of real passive and active satellite observations, by the GPM (Global Precipitation Measurements) Microwave Imager (GMI) and the CloudSat Cloud Profiling Radar, in radiative transfer (RT) simulations. While the tested particle models could accurately reproduce the real observations, it was difficult to find a particle model that performed better than the others. However, complementary simulations show promise with respect to the upcoming Ice Cloud Imager. In the fourth study, SSP of ice particles that have a preference towards horizontal orientation were calculated and applied to passive RT simulations at 166 GHz. The characteristic polarization signals present in GMI observations of clouds were successfully reproduced by RT simulations. The final study provides SSP of non-spheroidal rain drops, accounting for the effect of aerodynamic pressure upon the drop shape. It was found that this effect can have a small, but non-negligible, impact on passive and active microwave observations.
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| 18. |
- Ekelund, Robin Nils, 1989, et al.
(författare)
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Impact of ice aggregate parameters on microwave and sub-millimetre scattering properties
- 2019
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Ingår i: Journal of Quantitative Spectroscopy and Radiative Transfer. - : Elsevier BV. - 0022-4073. ; 224, s. 233-246
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Tidskriftsartikel (refereegranskat)abstract
- Microwave scattering properties for 1101 aggregates were calculated using DDA (Discrete Dipole Approximation), at three typical radar bands (13.4, 35.6, 94.1 GHz) and three passive microwave frequencies (183.31, 325.15 and 664 GHz). The aggregates were generated in a semi-physical stochastic fashion and are composed of hexagonal crystals of varying axis ratio, ranging from 1/15 (plates) to 15 (columns). Horizontally aligned particles were assumed and scattering properties were assessed for zenith/nadir observations. Crystal axis ratio, number of crystals, effective density and aerodynamic area, were found to correlate with extinction and back-scattering efficiencies. However, the dependency between these variables and scattering properties vary between the frequencies. Interestingly, bulk extinction was found to have a relatively low sensitivity to particle shape at 664 GHz. Furthermore, extinction was found to be less shape sensitive than back-scattering. These results are promising for the sake of the upcoming Ice Cloud Imager (ICI) mission. In addition, for the considered set of aggregates, it is shown that both bulk extinction and back-scattering are more directly related to snow fall than ice water content. Triple frequency signatures were also calculated, which demonstrated clear dependence on constituent crystal axis ratio and conversely on aggregate effective density, in agreement with the literature.
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| 19. |
- Ekelund, Robin Nils, 1989, et al.
(författare)
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Microwave single-scattering properties of non-spheroidal raindrops
- 2020
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Ingår i: Atmospheric Measurement Techniques. - : Copernicus GmbH. - 1867-1381 .- 1867-8548. ; 13:12, s. 6933-6944
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Tidskriftsartikel (refereegranskat)abstract
- Falling raindrops undergo a change in morphology as they grow in size and the fall speed increases. This change can lead to significant effects in passive and active microwave remote sensing measurements, typically in the form of a polarization signal. Because previous studies generally only considered either passive or active measurements and a limited set of frequencies, there exist no general guidelines on how and when to consider such raindrop effects in scientific and meteorological remote sensing. In an attempt to provide an overview on this topic, this study considered passive and active remote sensing simultaneously and a wider set of frequencies than in previous studies. Single-scattering property (SSP) data of horizontally oriented raindrops were calculated using the T-matrix method at a large set of frequencies (34 in total). The shapes of the raindrops were calculated assuming an aerodynamic equilibrium model, resulting in drops with flattened bases. The SSP data are published in an open-access repository in order to promote the usage of realistic microphysical assumptions in the microwave remote sensing community. Furthermore, the SSPs were employed in radiative transfer simulations of passive and active microwave rain observations, in order to investigate the impact of raindrop shape upon observations and to provide general guidelines on usage of the published database. Several instances of noticeable raindrop shape-induced effects could be identified. For instance, it was found that the flattened base of equilibrium drops can lead to an enhancement in back-scattering at 94.1 GHz of 1.5 dBZ at 10mm h(-1), and passive simulations showed that shape-induced effects on measured brightness temperatures can be at least 1 K.
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| 20. |
- Ekelund, Robin Nils, 1989, et al.
(författare)
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Using passive and active observations at microwave and sub-millimetre wavelengths to constrain ice particle models
- 2020
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Ingår i: Atmospheric Measurement Techniques. - : Copernicus GmbH. - 1867-1381 .- 1867-8548. ; 13:2, s. 501-520
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Tidskriftsartikel (refereegranskat)abstract
- Satellite microwave remote sensing is an important tool for determining the distribution of atmospheric ice globally. The upcoming Ice Cloud Imager (ICI) will provide unprecedented measurements at sub-millimetre frequencies, employing channels up to 664 GHz. However, the utilization of such measurements requires detailed data on how individual ice particles scatter and absorb radiation, i.e. single scattering data. Several single scattering databases are currently available, with the one by Eriksson et al. (2018) specifically tailored to ICI. This study attempts to validate and constrain the large set of particle models available in this database to a smaller and more manageable set. A combined active and passive model framework is developed and employed, which converts CloudSat observations to simulated brightness temperatures (TBs) measured by the Global Precipitation Measurement (GPM) Microwave Imager (GMI) and ICI. Simulations covering about 1 month in the tropical Pacific Ocean are performed, assuming different microphysical settings realized as combinations of the particle model and particle size distribution (PSD). Firstly, it is found that when the CloudSat inversions and the passive forward model are considered separately, the assumed particle model and PSD have a considerable impact on both radar-retrieved ice water content (IWC) and simulated TBs. Conversely, when the combined active and passive framework is employed instead, the uncertainty due to the assumed particle model is significantly reduced. Furthermore, simulated TBs for almost all the tested microphysical combinations, from a statistical point of view, agree well with GMI measurements (166, 186.31, and 190.31 GHz), indicating the robustness of the simulations. However, it is difficult to identify a particle model that outperforms any other. One aggregate particle model, composed of columns, yields marginally better agreement with GMI compared to the other particles, mainly for the most severe cases of deep convection. Of the tested PSDs, the one by McFarquhar and Heymsfield (1997) is found to give the best overall agreement with GMI and also yields radar dBZ–IWC relationships closely matching measurements by Protat et al. (2016). Only one particle, modelled as an air–ice mixture spheroid, performs poorly overall. On the other hand, simulations at the higher ICI frequencies (328.65, 334.65, and 668.2 GHz) show significantly higher sensitivity to the assumed particle model. This study thus points to the potential use of combined ICI and 94 GHz radar measurements to constrain ice hydrometeor properties in radiative transfer (RT) using the method demonstrated in this paper.
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| 21. |
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| 22. |
- Ekelund, Robin
(författare)
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Retrospective Sanctuaries : Investigating Conflicts in Retrospective Facebook Groups
- 2022
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Ingår i: Culture Unbound. - : Linköping University Electronic Press. - 2000-1525. ; 14:2, s. 61-82
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Tidskriftsartikel (refereegranskat)abstract
- This article investigates conflicts in retrospective Facebook groups, i.e., groups created with a particular interest and focus on the past, to analyse how members of these groups understand the past and how they negotiate, resist and challenge each other’s notions of the past. The data comes from a netnographic fieldwork within six such retrospective groups. Theoretical inspiration is drawn from Actor-Network-Theory (Harrison 2013, Latour 2005). The analysis thusly focuses on human (the members of the groups) as well as non-human actors (the operative logic of Facebook) and study how these produce associations between the past and the present. An overall result of the study is that the retrospective Facebook groups are not characterised by conflict. Instead, they are produced as places of sanctuary, where associations with the past becomes a basis for a nostalgic feel-good culture. However, the analysis also shows that the sanctuaries build on the production of a discontinuity and a conflict between the past and the present. Using Boym’s concept of ruinophilia, as well as Bauman’s concept of retrotopia, the article discusses how the conflicted discontinuity between the past and the present produces an us-and-them relationship where group members can come together in a nostalgic as well as a critical care for the world as it (in their perspectives) was supposed to be. The analysis also illustrates how members’ use of sources and references becomes a mere stylistic performance of authority, as the operative logic of Facebook not only enables but also constrains group interactions, reducing the members’ possibilities of having profound interactions and negotiations based on their memories and notions of the past. The article hereby contributes to the emerging research on digital memories in general, and memory work on Facebook in particular.
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| 23. |
- Ekelund, Robin
(författare)
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Retrospektiva modernister : om historiens betydelse för nutida mods
- 2017
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- "Retrospective modernists. On the significance of history for contemporary mods" This thesis studies the use and significance of history among contemporary mods in Sweden, that is, how the actors on the mod scene articulate and perform a sense of community with a specific past. Mod culture is first and foremost associated with the 1960s and the contemporary mods regard the 60s as the template and essence of their style. The actors thus become mods by enacting associations that stretch out over time, towards an imagined community that is based on the histories of mod cultures and mod styles of the past. Hereby I argue that the contemporary mod scene is an example of a retrospective trend through which the general interest in history as well as the use of history have increased. The thesis is based on a performative theory, inspired by Bruno Latour’s Actor-Network-Theory. History is thus regarded as makings-of-pasts-in-the-present. A qualitative ethnographical approach, based on interviews and observations, is used as the main method. Newspapers, magazines and fanzines from the 1960s, 1980s and 1990s are also studied. The four empirical chapters adress, in order, a differentiation between a Swedish and a British history of mod culture; the use of objects, such as vinyl records and tailor made suits, as a subcultural capital; how historically charged atmospheres at clubs and scooter rallies are evoked by networks of objects and human actors; and how maps of time and continuities are articulated as a way of dealing with and controlling temporal distances. Primarily, the thesis raise three themes in regards to the retrospective trend of the present. First, it illustrate how individuals and groups, by using and performing history, create meaningful boundaries for themselves. Retrospection thus functions as a way of gaining an existential presence and stability in an elusive present. Second, the use and performance of history seemingly narrows the distance towards the past. A central point in the thesis is, however, that the contemporary mods not only try to get closer to the desirable past, they also try to regain a distance and remoteness towards this past, in order to not reduce and deprive this past of its mystery and attraction. Thirdly, this regaining of the past’s remoteness is also a way of articulating this specific past as valuable. History is thus performed and used as a capital. I illustrate how this use of the past is performed in a selective way, through an ’us and them’ relationship, in which ”our own” history is elevated as holding the key to higher values and truths, while ”their” history is articulated as negative and problematic. The thesis thus contributes with new perspectives and knowledge on the significance and use of history in the present. It also contributes analytically and methodologically to subcultural studies, studies on history culture and to historical studies in general.
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| 24. |
- Ekelund, Robin
(författare)
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Scandia Introducerar: Digital Memory Studies
- 2020
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Ingår i: Scandia. - : Stiftelsen Scandia. - 0036-5483. ; 86:2, s. 119-135
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Forskningsöversikt (övrigt vetenskapligt/konstnärligt)abstract
- Denna 'Scandia introducerar' presenterar inriktningen 'digital memory studies' inom det större forskningsfältet 'memory studies', men även hur den berör digital historia och mediahistoria.
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| 25. |
- Ekelund, Robin
(författare)
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Young Feminist Men Finding their Way : On young Swedish Men’s Experiences of and Orientations in Feminist Settings
- 2020
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Ingår i: Culture Unbound. - : Linköping University Electronic Press. - 2000-1525. ; 12:3, s. 506-526
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Tidskriftsartikel (refereegranskat)abstract
- Men and feminism is a contentious topic. In theoretical discussions as well as in previous studies, men and feminism have been described as an oxymoron, that being a man and a feminist is a border land position and that it entails experiences of so-called gender vertigo or gender limbo. Still, there are men who identify themselves as feminists and engage in feminist settings, parties and organizations. In this article, I aim to explore how masculinity is constructed and shaped within feminism. The article is based on qualitative interviews with nine young feminist men in Sweden. Using Sara Ahmed’s queer phenomenology and the concepts of disorientation and reorientation, I analyse how the interviewees experience themselves as men and feminists and how they navigate within their feminist settings. The analysis illustrates that in contrast to previous research, the interviewees articulate an assuredness in their position as men and feminists. However, being a man and a feminist is still a somewhat disorienting position that promotes reflexive journeys through which the interviewees seek to elaborate a sensitive, perceptive and “softer” masculinity. Feminism can be seen as a way of doing masculinity, and the ways in which the interviewees (re)orient themselves in their feminist settings can be understood as processes of masculinity construction. These reorientations position the interviewees in the background of their feminist settings, where they carry out what I call political housekeeping and men-feminism. From this position, they also adopt a perspective of a theoretical as well as temporal distance and articulate themselves as actors in the history of feminism. Thus, the article highlights that feminist men can seek out a masculinity that is positioned in the background yet still experience themselves as subjects in the feminist struggle.
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| 26. |
- Eriksson, Patrick, 1964, et al.
(författare)
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A general database of hydrometeor single scattering properties at microwave and sub-millimetre wavelengths
- 2018
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Ingår i: Earth System Science Data. - : Copernicus GmbH. - 1866-3516 .- 1866-3508. ; 10:3, s. 1301-1326
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Tidskriftsartikel (refereegranskat)abstract
- A main limitation today in simulations and inversions of microwave observations of ice hydrometeors (cloud ice, snow, hail, etc.) is the lack of data describing the interaction between electromagnetic waves and the particles. To improve the situation, the development of a comprehensive dataset of such scattering properties has been started. The database aims at giving a broad coverage in both frequency (1 to 886 GHz) and temperature (190 to 270 K), to support both passive and active current and planned measurements, and to provide data corresponding to the full Stokes vector. This first version of the database is restricted to totally random particle orientation. Data for 34 particle sets, i.e. habits, have been generated. About 17 of the habits can be classified as single crystals, three habits can be seen as heavily rimed particles, and the remaining habits are aggregates of different types, e.g. snow and hail. The particle sizes considered vary between the habits, but maximum diameters of 10 and 20 mm are typical values for the largest single crystal and aggregate particles, respectively, and the number of sizes per habit is at least 30. Particles containing liquid water are also inside the scope of the database, but this phase of water is so far only represented by a liquid sphere habit. The database is built upon the netCDF4 file format. Interfaces to browse, extract and convert data for selected radiative transfer models are provided in MATLAB and Python. The database and associated tools are publicly available from Zenodo (https://doi.org/10.5281/zenodo.1175572, Ekelund et al., 2018b), and https://doi.org/10.5281/zenodo.1175588, Mendrok et al., 2018, respectively). Planned extensions include non-spherical raindrops, melting particles and a second orientation case that can be denoted as azimuthally random.
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| 27. |
- Fox, Stuart, et al.
(författare)
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Airborne validation of radiative transfer modelling of ice clouds at millimetre and sub-millimetre wavelengths
- 2019
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Ingår i: Atmospheric Measurement Techniques. - : Copernicus GmbH. - 1867-1381 .- 1867-8548. ; 12:3, s. 1599-1617
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Tidskriftsartikel (refereegranskat)abstract
- The next generation of European polar orbiting weather satellites will carry a novel instrument, the Ice Cloud Imager (ICI), which uses passive observations between 183 and 664 GHz to make daily global observations of cloud ice. Successful use of these observations requires accurate modelling of cloud ice scattering, and this study uses airborne observations from two flights of the Facility for Airborne Atmospheric Measurements (FAAM) BAe 146 research aircraft to validate radiative transfer simulations of cirrus clouds at frequencies between 325 and 664 GHz using the Atmospheric Radiative Transfer Simulator (ARTS) and a state-of-the-art database of cloud ice optical properties. Particular care is taken to ensure that the inputs to the radiative transfer model are representative of the true atmospheric state by combining both remote-sensing and in situ observations of the same clouds to create realistic vertical profiles of cloud properties that are consistent with both observed particle size distributions and bulk ice mass. The simulations are compared to measurements from the International Submillimetre Airborne Radiometer (ISMAR), which is an airborne demonstrator for ICI. It is shown that whilst they are generally able to reproduce the observed cloud signals, for a given ice water path (IWP) there is considerable sensitivity to the cloud microphysics, including the distribution of ice mass within the cloud and the ice particle habit. Accurate retrievals from ICI will therefore require realistic representations of cloud microphysical properties.
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| 28. |
- Hassan Jansson, Karin, 1966-, et al.
(författare)
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En empirisk historia
- 2022
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Ingår i: Historisk Tidskrift. - : Svenska Historiska Föreningen. - 0345-469X .- 2002-4827. ; 142:3, s. 307-319
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 29. |
- Hofmann, Robin, et al.
(författare)
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Oxygen therapy in suspected acute myocardial infarction
- 2017
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Ingår i: New England Journal of Medicine. - : MASSACHUSETTS MEDICAL SOC. - 0028-4793 .- 1533-4406. ; 377:13, s. 1240-1249
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: The clinical effect of routine oxygen therapy in patients with suspected acute myocardial infarction who do not have hypoxemia at baseline is uncertain. METHODS: In this registry-based randomized clinical trial, we used nationwide Swedish registries for patient enrollment and data collection. Patients with suspected myocardial infarction and an oxygen saturation of 90% or higher were randomly assigned to receive either supplemental oxygen (6 liters per minute for 6 to 12 hours, delivered through an open face mask) or ambient air. RESULTS: A total of 6629 patients were enrolled. The median duration of oxygen therapy was 11.6 hours, and the median oxygen saturation at the end of the treatment period was 99% among patients assigned to oxygen and 97% among patients assigned to ambient air. Hypoxemia developed in 62 patients (1.9%) in the oxygen group, as compared with 254 patients (7.7%) in the ambient-air group. The median of the highest troponin level during hospitalization was 946.5 ng per liter in the oxygen group and 983.0 ng per liter in the ambient-air group. The primary end point of death from any cause within 1 year after randomization occurred in 5.0% of patients (166 of 3311) assigned to oxygen and in 5.1% of patients (168 of 3318) assigned to ambient air (hazard ratio, 0.97; 95% confidence interval [CI], 0.79 to 1.21; P=0.80). Rehospitalization with myocardial infarction within 1 year occurred in 126 patients (3.8%) assigned to oxygen and in 111 patients (3.3%) assigned to ambient air (hazard ratio, 1.13; 95% CI, 0.88 to 1.46; P=0.33). The results were consistent across all predefined subgroups. CONCLUSIONS: Routine use of supplemental oxygen in patients with suspected myocardial infarction who did not have hypoxemia was not found to reduce 1-year all-cause mortality. (Funded by the Swedish Heart–Lung Foundation and others; DETO2X-AMI ClinicalTrials.gov number, NCT01787110.)
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| 30. |
- James, Stefan, 1964-, et al.
(författare)
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Effect of Oxygen Therapy on Cardiovascular Outcomes in Relation to Baseline Oxygen Saturation.
- 2019
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Ingår i: JACC. - : Elsevier BV. - 1936-8798 .- 1876-7605.
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVES: The aim of this study was to determine the effect of supplemental oxygen in patients with myocardial infarction (MI) on the composite of all-cause death, rehospitalization with MI, or heart failure related to baseline oxygen saturation. A secondary objective was to investigate outcomes in patients developing hypoxemia.BACKGROUND: In the DETO2X-AMI (Determination of the Role of Oxygen in Suspected Acute Myocardial Infarction) trial, 6,629 normoxemic patients with suspected MI were randomized to oxygen at 6 l/min for 6 to 12 hours or ambient air.METHODS: The study population of 5,010 patients with confirmed MI was divided by baseline oxygen saturation into a low-normal (90% to 94%) and a high-normal (95% to 100%) cohort. Outcomes are reported within 1 year. To increase power, all follow-up time (between 1 and 4 years) was included post hoc, and interaction analyses were performed with oxygen saturation as a continuous covariate.RESULTS: The composite endpoint of all-cause death, rehospitalization with MI, or heart failure occurred significantly more often in patients in the low-normal cohort (17.3%) compared with those in the high-normal cohort (9.5%) (p < 0.001), and most often in patients developing hypoxemia (23.6%). Oxygen therapy compared with ambient air was not associated with improved outcomes regardless of baseline oxygen saturation (interaction p values: composite endpoint, p = 0.79; all-cause death, p = 0.33; rehospitalization with MI, p = 0.86; hospitalization for heart failure, p = 0.35).CONCLUSIONS: Irrespective of oxygen saturation at baseline, we found no clinically relevant beneficial effect of routine oxygen therapy in normoxemic patients with MI regarding cardiovascular outcomes. Low-normal baseline oxygen saturation or development of hypoxemia was identified as an independent marker of poor prognosis. (An Efficacy and Outcome Study of Supplemental Oxygen Treatment in Patients With Suspected Myocardial Infarction; NCT01787110).
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| 31. |
- Lewis, Cathryn M, et al.
(författare)
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Genome scan meta-analysis of schizophrenia and bipolar disorder, part II : Schizophrenia
- 2003
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Ingår i: American Journal of Human Genetics. - 0002-9297 .- 1537-6605. ; 73:1, s. 34-48
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Tidskriftsartikel (refereegranskat)abstract
- Schizophrenia is a common disorder with high heritability and a 10-fold increase in risk to siblings of probands. Replication has been inconsistent for reports of significant genetic linkage. To assess evidence for linkage across studies, rank-based genome scan meta-analysis (GSMA) was applied to data from 20 schizophrenia genome scans. Each marker for each scan was assigned to 1 of 120 30-cM bins, with the bins ranked by linkage scores (1 = most significant) and the ranks averaged across studies (R(avg)) and then weighted for sample size (N(sqrt)[affected casess]). A permutation test was used to compute the probability of observing, by chance, each bin's average rank (P(AvgRnk)) or of observing it for a bin with the same place (first, second, etc.) in the order of average ranks in each permutation (P(ord)). The GSMA produced significant genomewide evidence for linkage on chromosome 2q (PAvgRnk<.000417). Two aggregate criteria for linkage were also met (clusters of nominally significant P values that did not occur in 1,000 replicates of the entire data set with no linkage present): 12 consecutive bins with both P(AvgRnk) and P(ord)<.05, including regions of chromosomes 5q, 3p, 11q, 6p, 1q, 22q, 8p, 20q, and 14p, and 19 consecutive bins with P(ord)<.05, additionally including regions of chromosomes 16q, 18q, 10p, 15q, 6q, and 17q. There is greater consistency of linkage results across studies than has been previously recognized. The results suggest that some or all of these regions contain loci that increase susceptibility to schizophrenia in diverse populations.
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| 32. |
- Pfreundschuh, Simon, 1989, et al.
(författare)
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Synergistic radar and radiometer retrievals of ice hydrometeors
- 2020
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Ingår i: Atmospheric Measurement Techniques. - : Copernicus GmbH. - 1867-1381 .- 1867-8548. ; 13:8, s. 4219-4245
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Tidskriftsartikel (refereegranskat)abstract
- Remote sensing observations at sub-millimeter wavelengths provide higher sensitivity to small hydrometeors and low water content than observations at millimeter wavelengths, which are traditionally used to observe clouds and precipitation. They are employed increasingly in field campaigns to study cloud microphysics and will be integrated into the global meteorological observing system to measure the global distribution of ice in the atmosphere with the launch of the Ice Cloud Imager (ICI) radiometer on board the second generation of European operational meteorological satellites (Metop-SG). Observations at these novel wavelengths provide valuable information not only on their own but also in combination with complementary observations at other wavelengths. This study investigates the potential of combining passive sub-millimeter radiometer observations with a hypothetical W-band cloud radar for the retrieval of frozen hydrometeors. An idealized cloud model is used to investigate the information content of the combined observations and establish their capacity to constrain the microphysical properties of ice hydrometeors. A synergistic retrieval algorithm for airborne observations is proposed and applied to simulated observations from a cloud-resolving model. Results from the synergistic retrieval are compared to equivalent radar- and passive-only implementations in order to assess the benefits of the synergistic sensor configuration. The impact of the assumed ice particle shape on the retrieval results is assessed for all retrieval implementations. We find that the combined observations better constrain the microphysical properties of ice hydrometeors, which reduces uncertainties in retrieved ice water content and particle number concentrations for suitable choices of the ice particle model. Analysis of the retrieval information content shows that, although the radar contributes the largest part of the information in the combined retrieval, the radiometer observations provide complementary information over a wide range of atmospheric states. Furthermore, the combined observations yield slightly improved retrievals of liquid cloud water in mixed-phase clouds, pointing towards another potential application of combined radar-radiometer observations.
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