| 1. |
- Amundin, Mats, et al.
(author)
-
A proposal to use distributional models to analyse dolphin vocalisation
- 2017
-
In: Proceedings of the 1st International Workshop on Vocal Interactivity in-and-between Humans, Animals and Robots, VIHAR 2017. - 9782956202905 ; , s. 31-32
-
Conference paper (peer-reviewed)abstract
- This paper gives a brief introduction to the starting points of an experimental project to study dolphin communicative behaviour using distributional semantics, with methods implemented for the large scale study of human language.
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| 2. |
- Schötz, Susanne, et al.
(author)
-
Phonetic Characteristics of Domestic Cat Vocalisations
- 2017
-
In: Proceedings of the 1st International Workshop on Vocal Interactivity in-and-between Humans, Animals and Robots, VIHAR 2017. - 9782956202905 ; , s. 5-6
-
Conference paper (peer-reviewed)abstract
- The cat (Felis catus, Linneaus 1758) has lived around or with humans for at least 10,000 years, and is now one of the most popular pets of the world with more than 600 millionindividuals. Domestic cats have developed a more extensive, variable and complex vocal repertoire than most other members of the Carnivora, which may be explained by their social organisation, their nocturnal activity and the long period of association between mother and young. Still, we know surprisingly little about the phonetic characteristics of these sounds, and about the interaction between cats and humans.Members of the research project Melody in human–cat communication (Meowsic) investigate the prosodic characteristics of cat vocalisations as well as the communication between human and cat. The first step includes a categorisation of cat vocalisations. In the next step it will be investigated how humans perceive the vocal signals of domestic cats. This paper presents an outline of the project which has only recently started.
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| 3. |
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| 4. |
- Fredenberg, Erik, 1979-
(author)
-
Spectral Mammography with X-Ray Optics and a Photon-Counting Detector
- 2009
-
Doctoral thesis (other academic/artistic)abstract
- Early detection is vital to successfully treating breast cancer, and mammography screening is the most efficient and wide-spread method to reach this goal. Imaging low-contrast targets, while minimizing the radiation exposure to a large population is, however, a major challenge. Optimizing the image quality per unit radiation dose is therefore essential. In this thesis, two optimization schemes with respect to x-ray photon energy have been investigated: filtering the incident spectrum with refractive x-ray optics (spectral shaping), and utilizing the transmitted spectrum with energy-resolved photon-counting detectors (spectral imaging). Two types of x-ray lenses were experimentally characterized, and modeled using ray tracing, field propagation, and geometrical optics. Spectral shaping reduced dose approximately 20% compared to an absorption-filtered reference system with the same signal-to-noise ratio, scan time, and spatial resolution. In addition, a focusing pre-object collimator based on the same type of optics reduced divergence of the radiation and improved photon economy by about 50%. A photon-counting silicon detector was investigated in terms of energy resolution and its feasibility for spectral imaging. Contrast-enhanced tumor imaging with a system based on the detector was characterized and optimized with a model that took anatomical noise into account. Improvement in an ideal-observer detectability index by a factor of 2 to 8 over that obtained by conventional absorption imaging was found for different levels of anatomical noise and breast density. Increased conspicuity was confirmed by experiment. Further, the model was extended to include imaging of unenhanced lesions. Detectability of microcalcifications increased no more than a few percent, whereas the ability to detect large tumors might improve on the order of 50% despite the low attenuation difference between glandular and cancerous tissue. It is clear that inclusion of anatomical noise and imaging task in spectral optimization may yield completely different results than an analysis based solely on quantum noise.
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| 5. |
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| 6. |
- Petersson, Jesper, 1974, et al.
(author)
-
Off the record: The invisibility work of doctors in a patient-accessible electronic health record information service.
- 2021
-
In: Sociology of health & illness. - : Wiley. - 1467-9566 .- 0141-9889. ; 43:5, s. 1270-1285
-
Journal article (peer-reviewed)abstract
- In this article, we draw on Michael Lipsky's work on street-level bureaucrats and discretion to analyse a real case setting comprising an interview study of 30 Swedish doctors regarding their experiences of changes in clinical work following patients being given access to medical records information online. We introduce the notion of invisibility work to capture how doctors exercise discretion to preserve the invisibility of their work, in contrast to the well-established notion of invisible work, which denotes work made invisible by parties other than those performing it. We discuss three main forms of invisibility work in relation to records: omitting information, cryptic writing and parallel note writing. We argue that invisibility work is a way for doctors to resolve professional tensions arising from the political decision to provide patients with online access to record information. Although invisibility work is understood by doctors as a solution to government-initiated visibility, we highlight how it can create difficulties for doctors concerning accountability towards patients, peers and authorities.
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| 7. |
- Liljenström, Hans, et al.
(author)
-
Scoping Report on Socio-Economic and Land Use Dynamics in the Stockholm-Mälar Region
- 2014
-
Reports (other academic/artistic)abstract
- This scoping report for the COMPLEX work package 4 (WP4) on Socio-Economic and Land Use Dynamics in the Stockholm-Mälar Region has several objectives. The first is to present and outline the state-of-the-art, including a literature review, with regard to complex pathways to a low carbon society, with special relevance to the Stockholm-Mälar region. It will do so in a larger context of complex socio-natural systems, with an emphasis on a green economy, bioen-ergy and land use, as well as on societal transformation and behavioural change. Another objec-tive is to inform primarily our partners in COMPLEX, but also others who might be interested, including stakeholders in our study region. Perhaps the most important objective with this re-port is to provide a basis for the collaborative work within our work package, and with our col-leagues elsewhere. In this second revised version of the report, we have extended some parts, and shortened others, depending on suggestions and interesting new information. A part of this new information has come from a stakeholder workshop held in Sigtuna in early 2014, which to a great extent could contribute to a more elaborate analysis of stakeholder and policy maker positions. In addition, there is now a more extensive description of relevant land use modelling. The illustrations included in this report are extracted from scientific articles and other material that we are referring to. Their origin is explicitly cited but no copyright authorization has been requested, while this report is intended primarily for internal spread and use within the COM-PLEX consortium and its networks.
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| 8. |
- Groth, Sanne Krogh, et al.
(author)
-
Introduction : Negotiating Noise Across Places, Spaces and Disciplines
- 2021
-
In: Negotiating Noise : Across Places, Spaces and Disciplines - Across Places, Spaces and Disciplines. - : The Sound Environment Centre at Lund University. - 9789198711707 - 9789198711714 ; 19:19, s. 15-33
-
Book chapter (other academic/artistic)
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| 9. |
- Lindborg, PerMagnus, 1968-
(author)
-
A taxonomy of sound sources in restaurants
-
In: Applied Acoustics. - 0003-682X .- 1872-910X.
-
Journal article (peer-reviewed)abstract
- Restaurants are complex environments where all our senses are engaged. Physical and psychoacoustic factors have been shown to be associated with perceived environmental quality in restaurants. More or less designable sound sources such as background music, voices, and kitchen noises are believed to be important in relation to the overall perception of the soundscape. Previous research publications have suggested typologies and other structured descriptions of sound sources for some environmental contexts, such as urban parks and offices, but there is no detailed account that is relevant to restaurants. While existing classification schemes might be extendable, an empirical approach was taken in the present work. We collected on-site data in 40 restaurants (n = 393), including perceptual ratings, free-form annotations of characteristic sounds and whether they were liked or not, and free-form descriptive words for the environment as a whole. The annotations were subjected to analysis using a cladistic approach and yielded a multi-level taxonomy of perceived sound sources in restaurants. Ten different classification taxa were evaluated by comparing the respondents' Liking of sound sources, by categories defined in the taxonomy, and their Pleasantness rating of the environment as a whole. Correlation analysis revealed that a four-level clade was efficient and outperformed alternatives. Internal validation of the Pleasantness construct was made through separate ratings (n = 7) of on-site free-form descriptions of the environment. External validation was made with ratings from a separate listening experiment (n = 48). The two validations demonstrated that the four-level Sound Sources in Restaurants (SSR) clade had good construct validity and external robustness. Analysis of the data revealed two findings. Voice-related characteristic sounds including a ‘people’ specifier were more liked than those without such a specifier (d = 0.14 SD), possibly due to an emotional crossmodal association mechanism. Liking of characteristic sounds differed between the first and last annotations that the respondents had made (d = 0.21 SD), which might be due to an initially positive bias being countered by exposure to a task inducing a mode of critical listening. We believe that the SSR taxonomy will be useful for field research and simulation design. The empirical findings might inform theory, specifically research charting the perception of sound sources in multimodal environments.
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| 10. |
- Keshavarz, Mahmoud, et al.
(author)
-
Orientations of Europe : Boats, the Mediterranean Sea and the Materialities of Contemporary Mobility Regimes
- 2018
-
In: Borderlands e-journal. - Sydney, NSW, Australia : Borderlands. - 1447-0810. ; 17:2, s. 1-27
-
Journal article (peer-reviewed)abstract
- This paper is an investigation of how the specific design and materiality of the artefact of the boat, as well as the various material, visual, technical and geographical practices at work in the space of Mediterranean Sea, orientate a specific space and produce a selective politics of seeing, saving and framing of bodies on the move. It highlights how the very presence and movement of ‘unseaworthy boats’ in this actively orientated space of the sea brings to the fore the many strategies and techniques that have been employed to make it a space of European control. We argue that this is an active and deadly orientation carried out in an often dispersed number of practices and interventions within a seemingly flat space of water. The paper concludes that border transgressors’ act of moving by boat, with all of the losses involved, both challenge and potentially reorientate European mobility regimes.
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| 11. |
- Masterton, Malin, 1979-, et al.
(editor, creator_code:cre_t)
-
ORU2015 Örebro University Research Evaluation 2015 : Evaluation Report
- 2015
-
Reports (other academic/artistic)abstract
- ORU2015 – Executive SummaryDuring 2015, all research performed from 2008 to 2014 at Örebro University, as well as research at Örebro University Hospital, has been evaluated. This report – ORU2015 – presents the background, planning and implementation of the research assessment and its results. Chapter I includes the panel evaluations, and chapter II presents the bibliometric data. Of the 38 subunits of evaluation, 8 are within the Faculty of Business, Science and Engineering, 17 are within the Faculty of Humanities and Social Sciences, 7 within the Faculty of Medicine and Health, and 6 at Region Örebro County’s University Hospital. The evaluation had a meta-analytical approach (see Annex A), and the external multidisciplinary panel assessed the research in each subunit of evaluation (see Annex B). The panel’s evaluation material consisted of a research overview, documentation on academic staff and competence, as well as on funding, self-evaluations and bibliometric data. The self-evaluations by each subunit addressed (i) scientific quality and scientific impact, (ii) impact and outreach, (iii) internationalisation, and (iv) research – education interaction. Each overarching evaluation unit was also assessed, including a SWOT analysis, by the respective heads of schools and deans. Apart from the self-evaluations, the material was retrieved from the university databases, Web of Science and Academic Archive Online (DiVA). The subunits had the opportunity to update their research information for the research overview prior to making the material available to the panel. The fourteen panellists, representing economics, natural sciences and technology, humanities, social sciences, medicine and health sciences, met for two days in October at Örebro University for the evaluation discussions. The agreed evaluation statements were delivered shortly thereafter. The great variability in the subunits’ scientific practices, scale, and establishment had to be accounted for in the panel evaluations. The evaluation subunits range from very large (up to 60 researchers), to medium sized (about 20 researchers), and to quite small subunits (fewer than nine researchers). The points of reference for the panel’s statements were the (i) quality of research, (ii) research environment and infrastructure, (iii) scientific and social interaction and (iv) future potential. Gradings ranged between Excellent (5) and Insufficient (1). The key data in the bibliometric assessment was scientific impact, vitality, productivity and international visibility, as indicated by the publications of each subunit. It can be seen from the panel statement of a subunit and the matching bibliometric data that these two assessments correspond to a large extent, but not completely.It is concluded from the panel evaluation that there are Excellent (5), Very Good (4), Good (3), Sufficient (2), as well as Insufficient (1) subunits at the university. A majority of the fourteen subunits that performed well (grade 3 – 5) are medium-sized, whilst the majority of the sixteen weakly performing subunits (grade 1 – 2) are small in size. Of course, for the humanities and social sciences, the Web of Science data only contains output to a limited degree. Therefore data from DiVA has been used and compared as well. For some subunits this makes a difference, but of the 16 subunits that show a weak performance according to Web of Science data, ten also perform weakly as shown in DiVA. Only three of these subunits score Good and one Very Good in DiVA.It can be seen from ORU2015 that the research volume, especially expressed in scientific publications per year and citations, has roughly doubled since ÖRE2010. In 2014, the total number of publications in Web of Science by researchers at the university and the university hospital reached some 600 and the number of citations were 14,000 the same year. The ‘findings’ of ORU2015 provide an important basis for decisions by leaders at all levels of the university in terms of strategic planning, support, and development of the research for the future.
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| 12. |
- Munthe, Christian, 1962
(author)
-
The Price of Precaution and the Ethics of Risk
- 2011
-
Book (other academic/artistic)abstract
- Since a couple of decades, the notion of a precautionary principle plays a central and increasingly influential role in international as well as national policy and regulation regarding the environment and the use of technology. Urging society to take action in the face of potential risks of human activities in these areas, the recent focus on climate change has further sharpened the importance of this idea. However, the idea of a precautionary principle has also been problematised and criticised by scientists, scholars and policy activists, and been accused of almost every intellectual sin imaginable: unclarity, impracticality, arbitrariness and moral as well as political unsoundness. In that light, the very idea of precaution as an ideal for policy making rather comes out as a dead end. On the basis of these contrasting starting points, Christian Munthe undertakes an innovative, in-depth philosophical analysis of what the idea of a precautionary principle is and should be about. A novel theory of the ethics of imposing risks is developed and used as a foundation for defending the idea of precaution in environmental and technological policy making against its critics, while at the same time avoiding a number of identified flaws. The theory is shown to have far-reaching consequences for areas such as bio-, information- and nuclear technology, and global environmental policy in areas such as climate change. The author argues that, while the price we pay for precaution must not be too high, we have to be prepared to pay it in order to act ethically defensible. A number of practical suggestions for precautionary regulation and policy making are made on the basis of this, and some challenges to basic ethical theory as well as consumerist societies, the global political order and liberal democracy are identified
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| 13. |
- Larsson, Stefan, et al.
(author)
-
Smart City Governance - AI Ethics in a Spatial Context : Select papers from 2021/2022
- 2022
-
Reports (pop. science, debate, etc.)abstract
- This brief anthology presents the basics of the interdisciplinary course called “Smart City Governance – AI Ethics in a Spatial Context”, given at Lund University. Furthermore, it includes three papers and a task written by students from the class of 2021/2022 in order to show examples of the topics possible to analyse when combining engineering students from programmes on data, ICT and land surveying with students from the humanities or social sciences.Head of course is Stefan Larsson, Associate Professor at the Department of Technology and Society at LTH, Lund University. As a socio-legal scholar and lawyer at a faculty of engineering, he leads a group studying governance and issues of trust and transparency with autonomous and AI-driven technologies in domains ranging from the public sector to consumer markets, medicine and social robotics.Laetitia Tanqueray is a Teaching Assistant on this course, and canvas coordinator. Laetitia holds bachelors’ in English Law and French Law and a master’s in Sociology of Law. She is a project assistant at the Department of Technology and Society at LTH, Lund University, investigating questions related to socio-legal robotics.
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| 14. |
- Munthe, Christian, 1962
(author)
-
Precaution and Ethics: Handling risks, uncertainties and knowledge gaps in the regulation of new biotechnologies
- 2017
-
Book (other academic/artistic)abstract
- This volume outlines and analyses ethical issues actualized by applying a precautionary approach to the regulation of new biotechnologies. It presents a novel way of categorizing and comparing biotechnologies from a precautionary standpoint. Based on this, it addresses underlying philosophical problems regarding the ethical assessment of decision-making under uncertainty and ignorance, and discusses how risks and possible benefits of such technologies should be balanced from an ethical standpoint. It argues on conceptual and ethical grounds for a technology neutral regulation as well as for a regulation that not only checks new technologies but also requires old, inferior ones to be phased out. It demonstrates how difficult ethical issues regarding the extent and ambition of precautionary policies need to be handled by such a regulation, and presents an overarching framework for doing so.
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| 15. |
- Pardalis, Georgios, 1983-, et al.
(author)
-
Swedish House Owners’ Intentions Towards Renovations : Is there a Market for One-Stop-Shop?
- 2019
-
In: Buildings. - Basel : MDPI. - 2075-5309. ; 9:7, s. 1-16
-
Journal article (peer-reviewed)abstract
- In this paper, we examine factors aecting owners’ intention for renovation of their detached houses. Furthermore, we analyze their interest in choosing a one-stop-shop (OSS) service for the renovation, even though such a concept is not yet established in Sweden, but emerging in other parts of Europe. Our study is based on responses to an online questionnaire survey of 971 house owners residing in Kronoberg Region in Sweden. About 76% of the respondents intend to renovate in the near future, with approximately 71% of them preferring to renovate individual components of their dwelling and 5% to renovate their whole house in steps. House owners of younger age, higher income, higher education, and those with an interest for environmental issues, were the ones most interested in physical renovations, which improves energy efficiency of the building. For those house owners, one-stop-shop can facilitate the decision-making process, and help them to choose those measures that will improve their quality of life. Approximately 20% of the respondents had a positive view towards an one-stop-shop, which is an indicator that market for such a service exists. Parameters such as quality of work, cost and energy savings and specification of measures to be adopted are the key for the promotion of one-stop-shop. Additionally, house owners want to have a certain level of involvement in the selection of actors performing the renovation. Moreover, financial incentives, e.g., loans, do not play a significant role for the selection of one-stop-shop, but act as complementary motive for house owners.
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| 16. |
- Wirsenius, Stefan, 1963, et al.
(author)
-
How much land is needed for global food production under scenarios of dietary changes and livestock productivity increases in 2030?
- 2010
-
In: Agricultural Systems. - : Elsevier BV. - 1873-2267 .- 0308-521X. ; 103:9, s. 621-638
-
Journal article (peer-reviewed)abstract
- Growing global population figures and per-capita incomes imply an increase in food demand and pressure to expand agricultural land. Agricultural expansion into natural ecosystems affects biodiversity and leads to substantial carbon dioxide emissions.Considerable attention has been paid to prospects for increasing food availability, and limiting agricultural expansion, through higher yields on cropland. In contrast, prospects for efficiency improvements in the entire food-chain and dietary changes toward less land-demanding food have not been explored as extensively. In this study, we present model-based scenarios of global agricultural land use in 2030, as a basis for investigating the potential for land-minimized growth of world food supply through: (i) faster growth in feed-to-food efficiency in animal food production; (ii) decreased food wastage; and (iii) dietary changes in favor of vegetable food and less land-demanding meat. The scenarios are based in part on projections of global food agriculture for 2030 by the Food and Agriculture Organization of the United Nations, FAO. The scenario calculations were carried out by means of a physical model of the global food and agriculture system that calculates the land area and crops/pasture production necessary to provide for a given level of food consumption.In the reference scenario - developed to represent the FAO projections - global agricultural area expands from the current 5.1. billion ha to 5.4. billion. ha in 2030. In the faster-yet-feasible livestock productivity growth scenario, global agricultural land use decreases to 4.8. billion. ha. In a third scenario, combining the higher productivity growth with a substitution of pork and/or poultry for 20% of ruminant meat, land use drops further, to 4.4. billion. ha. In a fourth scenario, applied mainly to high-income regions, that assumes a minor transition towards vegetarian food (25% decrease in meat consumption) and a somewhat lower food wastage rate, land use in these regions decreases further, by about 15%. © 2010 Elsevier Ltd.
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| 17. |
- Spik, Susanne, 1962-, et al.
(author)
-
Tánnak – här och nu : En förstudie om förutsättningar för att stärka samiska innovationsföretag
- 2020
-
Reports (other academic/artistic)abstract
- I början av 2000-talet tog Susanne Spik och Karin Kuoljok, båda renägare och renskötare i Sirges sameby, initiativ till ett projekt i samarbete med Luleå tekniska universitet ”Kvinna i sameby”. I samtalen i projektet föddes en dröm om att kunna spåra och följa renar på nätet. Susanne och Karin inledde ett samarbete med forskare inom genus och teknik och informations- och kommunikationsteknologi (IKT) med mål att ta fram ett kommunikationsnätverk anpassat till fjällmiljön baserat på nätverkstekniken Delayed Tolerant Networking, DTN. För att kunna vidareutveckla ett renspårningssystem anpassat till den nya nätverksmiljön och den samiska renskötselns förutsättningar startade Susanne och Karin företaget, Tánnak AB. Företaget blev en tidig föregångare i att utveckla en produkt som kombinerade informations- och kommunikationsteknik (IKT) med traditionell ekologisk kunskap (TEK). Förenklat kan TEK sägas vara kunskap om den nära naturomgivningen och hur den hållbart kan utnyttjas. TEK har vuxit fram främst hos människor som varit beroende av naturresurser de hade i sin närhet. Kunskapen skiftar över tid och följer förändringar i både traditioner och naturförhållanden. Kunskapen förs vanligtvis vidare muntligt och i praktiskt arbete. Susanne och Karins intresse för att ta fram produkten föddes utifrån sina egna erfarenheter och behov som renskötare och kvinnor, men också med en önskan om att underlätta för den yngre generationen att kunna fortsätta bedriva renskötsel och leva ett bra liv. Behovet var formulerat utifrån deras erfarenheter och syftade till att kunna utveckla och förnya renskötseln. En del i detta var att också få ner driftskostnaderna och att minska miljöpåverkan. Deras ursprungliga företag har idag övergått till företaget Tánnak International AB som marknadsför spårningssystemet för även andra områden än renskötseln. Tánnak International AB bygger vidare på den produkt som Susanne och Karin tog fram utifrån sina kunskaper om både renskötsel och markerna. Idag är dock Susanne och Karin inte längre majoritetsägare i företaget och renspårningssystemet saknar formellt patent. Susanne Spik och Karin Kuoljok har idag inte ekonomiskt inflytande i nuvarande företaget Tánnak International AB. Denna förstudie bygger på ett samarbete med nuvarande ledning för Tánnak international AB, Bobby och Jim Carlsson och de ursprungliga innovatörerna till företaget, Karin Kuoljok och Susanne Spik och forskaren May-Britt Öhman. Förstudien är en del av forskningsprojektet Dálkke – urfolksperspektiv på klimatförändringar, inom ramen för delområdet som rör samisk innovation och klimatförändringar. Förstudien syftar till att initiera en process att undersöka förutsättningarna i svenska Sápmi för samiska innovation och att fördjupa företagets kunnande om urfolk och mänskliga rättigheter. I denna process ingår att lyfta fram de ursprungliga innovatörernas grundidéer och deras produkt som en samisk innovation. På så sätt kan Tánnak International stärka sitt varumärke genom att profilera sig som ett samiskt innovationsföretag som kombinerar ny teknik med traditionell ekologisk kunskap. Certifieringar och märkningar kan vägleda konsumenter och underlätta för företag i att profilera sin produkt. Finns det behov av att certifiera samiska innovationsföretag? För att kunna undersöka förutsättningarna för att ta fram ett certifieringssystem för samiska innovationsföretag behövs en kartläggning av vilka certifieringar och märkningar som finns och hur dessa fungerar i svenska Sápmi idag.
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| 18. |
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| 19. |
- Isacson, Åsa, 1983, et al.
(author)
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The use of digital layers in post-growth communities - an exploratory study
- 2023
-
In: Proceedings for the 6th International Conference on Smart Villages and Rural Development (COSVARD 2023). - 9780734057150
-
Conference paper (other academic/artistic)abstract
- The pursuit of infinite growth on a planet with finite resources is leading to a failure in achieving global sustainable transition goals. The concept of Degrowth or 'post-growth' has emerged as a counter-movement advocating for alternative approaches focused on living within resource constraints. Within this context, small-scale communities with post-growth orientations are particularly interesting, as they actively explore their own alternative development models. These communities have potential to act as decentralised laboratories for radical change, translating Degrowth/post-growth theory into actionable practices. This paper examines how the operational tools have changed for post-growth communities since 2004 (Web 2.0). Through in-depth interviews with tech-savvy representatives in this field, the study explores the potential of "new" technologies to empower post-growth communities.
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| 20. |
- Löfgren, Johan, 1983, et al.
(author)
-
Tropospheric correction for InSAR using interpolated ECMWF data and GPS zenith total delay from the Southern California Integrated GPS Network
- 2010
-
In: Proceedings of the 2010 IEEE International Geoscience and Remote Sensing Symposium, Proceedings DVD-ROM. - 9781424495665 ; , s. 4503-4506
-
Conference paper (other academic/artistic)abstract
- A tropospheric correction method for Interferometric Synthetic Aperture Radar (InSAR) was developed using profiles from the European Centre for Medium-Range Weather Forecasts (ECMWF) and Zenith Total Delay (ZTD) from the Global Positioning System (GPS). The ECMWF data were interpolated into a finer grid with the Stretched Boundary Layer Model (SBLM) using a Digital Elevation Model (DEM) with a horizontal resolution of 1 arcsecond. The output were converted into ZTD and combined with the GPS ZTD in order to achieve tropospheric correction maps utilizing both the high spatial resolution of the SBLM and the high accuracy of the GPS. These maps were evaluated for three InSAR images, with short temporal baselines (implying no surface deformation), from Envisat during 2006 on an area stretching northeast from the Los Angeles basin towards Death Valley.The RMS in the InSAR images was greatly reduced, up to 32%, when using the tropospheric corrections. Two of the residuals showed a constant gradient over the area, suggesting a remaining orbit error. This error was reduced by reprocessing the troposphere corrected InSAR images with the result of an overall RMS reduction of 15 − 68%.
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| 21. |
-
Challenge the past / diversify the future - proceedings
- 2015
-
Editorial collection (other academic/artistic)abstract
- Challenge the Past / Diversify the Future is a multidisciplinary conference for scholars and practitioners who study the implementation and potential of visual and multi-sensory representations to challenge and diversify our understanding of history and culture. This volume contains an overview of all the presentations.
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| 22. |
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| 23. |
- Linnéusson, Gary, et al.
(author)
-
In Need for Better Maintenance Cost Modelling to Support the Partnership with Manufacturing
- 2016. - 1
-
In: Current Trends in Reliability, Availability, Maintainability and Safety. - Cham : Springer. - 9783319235967 - 9783319235974 ; , s. 263-282
-
Conference paper (other academic/artistic)abstract
- The problem of maintenance consequential costs has to be dealt with in manufacturing and is core of this paper. The need of sustainable partnership between manufacturing and maintenance is addressed. Stuck in a best practice thinking, applying negotiation as a method based on power statements in the service level agreement, the common best possible achievable goal is put on risk. Instead, it may enforce narrow minded sub optimized thinking even though not intended so. Unfortunately, the state of origin is not straightforward business. Present maintenance cost modelling is approached, however limits to its ability to address the dynamic complexity of production flows are acknowledged. The practical problem to deal with is units put together in production flows; in which downtime in any unit may or may not result in decreased throughput depending on its set up. In this environment accounting consequential costs is a conundrum and a way forward is suggested. One major aspect in the matter is the inevitable need of shift in mind, from perspective thinking in maintenance and manufacturing respectively towards shared perspectives, nourishing an advantageous sustainable partnership.
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| 24. |
- Löfgren, Johan, 1983, et al.
(author)
-
High-rate local sea level monitoring with a GNSS-based tide gauge
- 2010
-
In: Proceedings of the 2010 IEEE International Geoscience and Remote Sensing Symposium, Proceedings DVD-ROM. - 9781424495665 ; , s. 3616-3619
-
Conference paper (other academic/artistic)abstract
- We present first results from the analysis of high-rate observations with a GNSS-based tide gauge at the Onsala Space Observatory. The goal is to determine local sea level with high temporal resolution. The GNSS-based tide gauge makes use of right-hand circular polarized GNSS signals that are directly received and left-hand circular polarized GNSS signals that are reflected from the sea surface. An experimental setup of the GNSS-based tide gauge was operated in the spring of 2010 and data were recorded with a sampling rate of 20 Hz.We analyzed data decimated to 1 Hz using different temporal resolution between 5 and 240 seconds, and the resulting time series of local sea level were compared to each other and to results from two stilling well gauges. The comparison with the data from the stilling well gauges shows a common trend.The comparison of the results from analyses with different temporal resolution show consistent results. There is also an indication that the GNSS-based tide gauge might be able to give information on the sea surface state.
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| 25. |
- Löfgren, Johan, 1983, et al.
(author)
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Monitoring coastal sea level using reflected GNSS signals
- 2011
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In: Advances in Space Research. - : Elsevier BV. - 1879-1948 .- 0273-1177. ; 47:2, s. 213-220
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Journal article (peer-reviewed)abstract
- A continuous monitoring of coastal sea level changes is important for human society since it is predicted that up to 332 million people in coastal and low-lying areas will be directly affected by flooding from sea level rise by the end of the 21st century. The traditional way to observe sea level is using tide gauges that give measurements relative to the Earth’s crust. However, in order to improve the understanding of the sea level change processes it is necessary to separate the measurements into land surface height changes and sea surface height changes. These measurements should then be relative to a global reference frame. This can be done with satellite techniques, and thus a GNSS-based tide gauge is proposed. The GNSS-based tide gauge makes use of both GNSS signals that are directly received and GNSS signals that are reflected from the sea surface. An experimental installation at the Onsala Space Observatory (OSO) shows that the reflected GNSS signals have only about 3 dB less signal-to-noise-ratio than the directly received GNSS signals. Furthermore, a comparison of local sea level observations from the GNSS-based tide gauge with two stilling well gauges, located approximately 18 km and 33 km away from OSO, gives a pairwise root-mean-square agreement on the order of 4 cm. This indicates that the GNSS-based tide gauge gives valuable results for sea level monitoring.
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