| 1. |
- Özdogan, Özgecan, et al.
(author)
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Downlink Spectral Efficiency of Massive MIMO with Dual-Polarized Antennas
- 2021
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In: WSA 2021 - 25th International ITG Workshop on Smart Antennas. - : VDE Verlag GmbH. ; , s. 323-328
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Conference paper (peer-reviewed)abstract
- This paper considers the downlink of a single-cell massive MIMO (multiple-input multiple-output) system with dual-polarized antennas at both the base station and users. We consider a channel model that takes into account several practical aspects that arise when utilizing dual polarization, such as channel cross-polar discrimination (XPD) and cross-polar receive and transmit correlations (XPC). We derive the statistical properties of the minimum mean squared error (MMSE) channel estimator for this model. Using these estimates for maximum ratio precoding, a rigorous closed-form downlink spectral efficiency (SE) expression is derived. We compare the SEs achieved in dual-polarized and uni-polarized setups numerically and evaluate the impact of XPD on the downlink SE.
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| 2. |
- Krantz, Gunnar, Konstnärlig professor, 1962-
(author)
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Bicycle hippie : Sketching beyond the boundaries of time and space – developing scrawled memories of the past
- 2015
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In: Voyages. Sixth International Graphic Novel and Comics Conference & Ninth International Bande Dessinée Society Conference, 22nd-26th June 2015. University of London Institute in Paris.
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Conference paper (other academic/artistic)abstract
- Contemporary Swedish comics feature three strong genres: Autobiography, politics and feminism. Some of these comics, often drawn in expressive “crude” styles and echoing the famous slogan of the 60s that “ the personal is political”, have become nothing less than national bestsellers. To understand this shift in the Swedish comics market, from mainstream towards the “avant-garde”, one must take a look at the emergence of autobiographical comics in the mid 90s. These comics were often accused of being drawn in “crude” styles, by artists consciously lowering their standards. But the trend was (at it’s peak) so dominant that even established artists and publishers followed it and thus reached new audiences. Being one of the forerunners of this trend in Sweden, I have reflected upon the acceptance of these “scrawled” narratives and also on the development of my own style, as a result of my efforts to recreate memories of voyages in the past. The questions I raised before creating these comics were: What do memories look like? And:How do I recreate them in a believable way? What I found out by venturing into the past was that this “stenographic” style actually conveyed realism in a more believable way, than realistically drawn images, and made me realise that my work actually corresponded with Töppfers theories on “systematic scrawling”.
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| 3. |
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| 4. |
- An, A. K., et al.
(author)
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Clean Energy and Resource Recovery : Wastewater Treatment Plants as Biorefineries, Volume 2
- 2021
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Book (other academic/artistic)abstract
- Clean Energy and Resource Recovery: Wastewater Treatment Plants as Bio-refineries, Volume 2, summarizes the fundamentals of various treatment modes applied to the recovery of energy and value-added products from wastewater treatment plants. The book addresses the production of biofuel, heat, and electricity, chemicals, feed, and other products from municipal wastewater, industrial wastewater, and sludge. It intends to provide the readers an account of up-to-date information on the recovery of biofuels and other value-added products using conventional and advanced technological developments. The book starts with identifying the key problems of the sectors and then provides solutions to them with step-by-step guidance on the implementation of processes and procedures. Titles compiled in this book further explore related issues like the safe disposal of leftovers, from a local to global scale. Finally, the book sheds light on how wastewater treatment facilities reduce stress on energy systems, decrease air and water pollution, build resiliency, and drive local economic activity. As a compliment to Volume 1: Biomass Waste Based Biorefineries, Clean Energy and Resource Recovery, Volume 2: Wastewater Treatment Plants as Bio-refineries is a comprehensive reference on all aspects of energy and resource recovery from wastewater. The book is going to be a handy reference tool for energy researchers, environmental scientists, and civil, chemical, and municipal engineers interested in waste-to-energy.
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| 5. |
- Eriksson, Jonnie, 1978-, et al.
(author)
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Figures of Postwar Sliding : Utopia and Violence in the Extreme Sport Performances of James Bond
- 2020
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In: Social Sciences. - Basel : MDPI. - 2076-0760. ; 9:12
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Journal article (peer-reviewed)abstract
- This article investigates the utopian visions of extreme sports as a postwar phenomenon by contrasting it to the violence of the extreme sport practitioner par excellence in postwar/cold war cinema: James Bond. Continental philosophy and cultural studies furnish extreme sport as a manifold of wholesome, meaningful, sustainable, life-enhancing, and environmentally intimate practices, less orientated toward human rivalry than its traditional namesake. Certain attention is thus paid to the movement of sliding in extreme sports that thrive on powerful natural forces such as air, wind, snowy slopes, and big waves, creating an ambivalent field between mastery and letting oneself go. Sliding, or glissade, is treated as a “figure of thought” that Bond is mustered to embody and enact with his extreme athletic repertoire. The analysis of James Bond’s extreme sport sliding is contrasted to the musings of glissade philosophers such as Jean-Paul Sartre, Gilles Deleuze, and Michel Serres. It is concluded that if there is utopianism in James Bond’s extreme sport performances, it is in the sliding itself, while the attaining of that state is paved with violence towards everything material. The article reinforces the concept of the extreme in relation to sport as a processual tool, rather than a category describing a fixed set of characteristics adhering to a certain practice.© 2020 by the authors. Licensee MDPI, Basel, Switzerland.
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| 8. |
- Bonander, Carl, et al.
(author)
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A regression discontinuity analysis of the social distancing recommendations for older adults in Sweden during COVID-19.
- 2022
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In: European Journal of Public Health. - : Oxford University Press. - 1101-1262 .- 1464-360X. ; 32:5, s. 799-806
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Journal article (peer-reviewed)abstract
- BACKGROUND: This paper investigates the impact of a non-mandatory and age-specific social distancing recommendation on isolation behaviors and disease outcomes in Sweden during the first wave of the COVID-19 pandemic (March to July, 2020). The policy stated that people aged 70 years or older should avoid crowded places and contact with people outside the household.METHODS: We used a regression discontinuity design-in combination with self-reported isolation data from COVID Symptom Study Sweden (n = 96,053; age range: 39-79 years) and national register data (age range: 39-100+ years) on severe COVID-19 disease (hospitalization or death, n = 21,804) and confirmed cases (n = 48,984)-to estimate the effects of the policy.RESULTS: Our primary analyses showed a sharp drop in the weekly number of visits to crowded places (-13%) and severe COVID-19 cases (-16%) at the 70-year-threshold. These results imply that the age-specific recommendations prevented approximately 1,800 to 2,700 severe COVID-19 cases, depending on model specification.CONCLUSION: It seems that the non-mandatory, age-specific recommendations helped control COVID-19 disease during the first wave of the pandemic in Sweden, as opposed to not implementing a social distancing policy aimed at older adults. Our study provides empirical data on how populations may react to non-mandatory, age-specific social distancing policies in the face of a novel virus.SUPPLEMENTARY MATERIAL: Online appendix with figures, tables, extra methods and results.
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| 10. |
- Galka, Frank, et al.
(author)
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Proteomic characterization of the whole secretome of Legionella pneumophila and functional analysis of outer membrane vesicles.
- 2008
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In: Infection and immunity. - 1098-5522. ; 76:5, s. 1825-36
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Journal article (peer-reviewed)abstract
- Secretion of effector molecules is one of the major mechanisms by which the intracellular human pathogen Legionella pneumophila interacts with host cells during infection. Specific secretion machineries which are responsible for the subfraction of secreted proteins (soluble supernatant proteins [SSPs]) and the production of bacterial outer membrane vesicles (OMVs) both contribute to the protein composition of the extracellular milieu of this lung pathogen. Here we present comprehensive proteome reference maps for both SSPs and OMVs. Protein identification and assignment analyses revealed a total of 181 supernatant proteins, 107 of which were specific to the SSP fraction and 33 of which were specific to OMVs. A functional classification showed that a large proportion of the identified OMV proteins are involved in the pathogenesis of Legionnaires' disease. Zymography and enzyme assays demonstrated that the SSP and OMV fractions possess proteolytic and lipolytic enzyme activities which may contribute to the destruction of the alveolar lining during infection. Furthermore, it was shown that OMVs do not kill host cells but specifically modulate their cytokine response. Binding of immunofluorescently stained OMVs to alveolar epithelial cells, as visualized by confocal laser scanning microscopy, suggested that there is delivery of a large and complex group of proteins and lipids in the infected tissue in association with OMVs. On the basis of these new findings, we discuss the relevance of protein sorting and compartmentalization of virulence factors, as well as environmental aspects of the vesicle-mediated secretion.
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