Deep learning denoising by dimension reduction: Application to the ORION-B line cubes

Context. The availability of large bandwidth receivers for millimeter radio telescopes allows the acquisition of position-position-frequency data cubes over a wide field of view and a broad frequency coverage. These cubes contain much information on the physical, chemical, and kinematical properties of the emitting gas. However, their large size coupled with inhomogenous signal-to-noise ratio (SNR) are major challenges for consistent analysis and interpretation.Aims. We search for a denoising method of the low SNR regions of the studied data cubes that would allow to recover the low SNR emission without distorting the signals with high SNR.Methods. We perform an in-depth data analysis of the 13 CO and C 17 O (1 -- 0) data cubes obtained as part of the ORION-B large program performed at the IRAM 30m telescope. We analyse the statistical properties of the noise and the evolution of the correlation of the signal in a given frequency channel with that of the adjacent channels. This allows us to propose significant improvements of typical autoassociative neural networks, often used to denoise hyperspectral Earth remote sensing data. Applying this method to the 13 CO (1 -- 0) cube, we compare the denoised data with those derived with the multiple Gaussian fitting algorithm ROHSA, considered as the state of the art procedure for data line cubes.Results. The nature of astronomical spectral data cubes is distinct from that of the hyperspectral data usually studied in the Earth remote sensing literature because the observed intensities become statistically independent beyond a short channel separation. This lack of redundancy in data has led us to adapt the method, notably by taking into account the sparsity of the signal along the spectral axis. The application of the proposed algorithm leads to an increase of the SNR in voxels with weak signal, while preserving the spectral shape of the data in high SNR voxels.Conclusions. The proposed algorithm that combines a detailed analysis of the noise statistics with an innovative autoencoder architecture is a promising path to denoise radio-astronomy line data cubes. In the future, exploring whether a better use of the spatial correlations of the noise may further improve the denoising performances seems a promising avenue. In addition

Promoting participation : Challenges and possibilities of designing edutainment productions together with children and teenagers

Denna avhandling inom interaktionsdesign handlar om användarmedverkan vid design av digitala edutainmentspel. Arbetet omfattar en aktionsorienterad forskningsansats där barns och ungdomars medverkan har främjats i tre tillämpade designprojekt. Genom observationer och intervjuer har utmaningar och strategier för användarmedverkan dokumenterats. Därtill även de bidrag som barnens och ungdomarnas medverkan innebar för design av edutainmentspel. Avhandlingen visar på två tydliga resultat. För det första, genom de utmaningar för användarmedverkan som designprocessen innebar och hanterandet av dessa utmaningar, så påvisas hur motiv till användarmedverkan kan förändras hos designteamet. Denna förändring är en pågående process som sker före, under och efter ett designprojekt. Motiv till användarmedverkan förändras med stöd av en förmedlare. En förmedlare bibringar synpunkter och designförslag mellan användare och designers. Förmedlaren anpassar även användarmedverkan till det sammanhang inom vilket designprojektet genomförs. Genom att delge designteamet dokument om och resultat av användarsessioner, så omvandlas förmedlarens kunskap om och erfarenhet av användarmedverkan till designteamets egen. Kunskap och erfarenhet vilka därefter förändrar motiv till design av fördel för användarmedverkan. För det andra så dokumenteras i avhandlingen betydelsen av att barn och ungdomar medverkar vid design av edutainmentspel. Dessa spel har under en längre tid utmanats av att finna balans mellan lärande och underhållning. Genom sin erfarenhet av målgruppens förväntningar på tekniken, samt av att bidra inom områden för design så som; koncept och innehåll, interaktionslösningar, samt utseende och känsla, så medförde barnens och ungdomarnas medverkan ett stöd för designteamet i att finna balans mellan lärande och underhållning. I resultaten framkommer att barnen och ungdomarna deltog i projekten i egenskap av informanter. Eftersom de inte hade ansvar för den utvecklade produktionen betraktades de inte heller som medlemmar i designteamet. Med sina resultat medverkar avhandlingen i diskursen om hur traditionella designperspektiv kan tillämpas vid design av digitala edutainmentproduktioner

Digital Person-Centered Self-Management Support for People With Type 2 Diabetes : Qualitative Study Exploring Design Challenges

Background: Self-management is a substantial part of treatment for patients with type 2 diabetes (T2D). Modern digital technology, being small, available, and ubiquitous, might work well in supporting self-management. This study follows the process of developing a pilot implementation of an electronic health (eHealth) service for T2D self-management support in primary health care. The use of digital health, or eHealth, solutions for supporting self-management for patients with T2D is increasing. There are good examples of successful implementations that can serve as guides in the development of new solutions. However, when adding person-centered principles as a requirement, the examples are scarce. Objective: The objective of this study was to explore challenges that could impact the design of a person-centered eHealth service for T2D self-management support. The study included data collection from multiple sources, that is, interviews, observations, focus groups, and a Mentimeter (interactive presentation with polling) survey among stakeholders, representing various perspectives of T2D. Methods: A user-centered design approach was used to exploratively collect data from different sources. Data were collected from a workshop, interviews, and observations. The different data sources enabled a triangulation of data. Results: Results show that user needs related to an eHealth service for person-centered T2D self-management support are multifaceted and situated in a complex context. The two main user groups, patients and diabetes specialist nurses, express needs that both diverge and converge, which indicates that critical design decisions have to be made. There is also a discrepancy between the needs expressed by the potential users and the current work practice, suggesting more attention toward changing the organization of work to fully support a new eHealth service. Conclusions: A total of three overarching challenges—flexible access, reducing administrative tasks, and patient empowerment—each having a significant impact on design, are discussed. These challenges need to be considered and resolved through careful design decisions. Special attention has to be given to the patient user group that could greatly impact current work practice and power structures at the primary care unit. A need for further studies investigating patient needs in everyday life is identified to better support the implementation of technology that does not give specific attention to organizational perspectives but instead approach design with the patient perspective in focus

Digital person-centered self-management support for people with type 2 diabetes : Qualitative study exploring design challenges

BACKGROUND: Self-management is a substantial part of treatment for patients with type 2 diabetes (T2D). Modern digital technology, being small, available, and ubiquitous, might work well in supporting self-management. This study follows the process of developing a pilot implementation of an electronic health (eHealth) service for T2D self-management support in primary health care. The use of digital health, or eHealth, solutions for supporting self-management for patients with T2D is increasing. There are good examples of successful implementations that can serve as guides in the development of new solutions. However, when adding person-centered principles as a requirement, the examples are scarce. OBJECTIVE: The objective of this study was to explore challenges that could impact the design of a person-centered eHealth service for T2D self-management support. The study included data collection from multiple sources, that is, interviews, observations, focus groups, and a Mentimeter (interactive presentation with polling) survey among stakeholders, representing various perspectives of T2D. METHODS: A user-centered design approach was used to exploratively collect data from different sources. Data were collected from a workshop, interviews, and observations. The different data sources enabled a triangulation of data. RESULTS: Results show that user needs related to an eHealth service for person-centered T2D self-management support are multifaceted and situated in a complex context. The two main user groups, patients and diabetes specialist nurses, express needs that both diverge and converge, which indicates that critical design decisions have to be made. There is also a discrepancy between the needs expressed by the potential users and the current work practice, suggesting more attention toward changing the organization of work to fully support a new eHealth service. CONCLUSIONS: A total of three overarching challenges-flexible access, reducing administrative tasks, and patient empowerment-each having a significant impact on design, are discussed. These challenges need to be considered and resolved through careful design decisions. Special attention has to be given to the patient user group that could greatly impact current work practice and power structures at the primary care unit. A need for further studies investigating patient needs in everyday life is identified to better support the implementation of technology that does not give specific attention to organizational perspectives but instead approach design with the patient perspective in focus

TEMA: Gränsöverskridande i och kring litteraturen

Detta första nummer av Institutionen för Humanioras nya skriftserie innehåller följande bidrag: Ingela Pehrson Berger: "Ge mig din mänsklighet". Om gränserna och 'mellanrummet' som tema i Kerstin Ekmans romaner Guds barmhärtighet och Sista rompan Birgitta Bergsten: Överskrida gränser - är det tillåtet? Två litterära svenska exempel Hans Färnlöf: Inre och yttre sfärer - gränsöverskridandets problematik i Tecknet av Maupassant Sture Packalén: Zum Eigenen und Fremden bei Erich Fried und Peter Weiss Petra Thore: Den tyskspråkiga migrantlitteraturen - begreppsdiskussion och reception under tre decennier Monica Loeb: Chappaquiddick Engendered: Joyce Carol Oates Lends a Voice to The Dead in Black Water Karin Molander Danielsson: Detektivserien, en genre under utveckling Tommy Öberg: Paul Auster and Intertextuality - The Influence of Film Noir in Ghosts Anette Månsson: Kung Oidipus av Egypten: dramatiskt möte mellan västerländska och österländska litterära traditioner i Tawfiq al Hakims Al-Malik OudibRedaktör: Professor Sture Packalén</p