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  • Ahlberg, Per
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Organismal Biology, Evolution and Developmental Biology.
    Follow the footprints and mind the gaps: a new look at the origin of tetrapods2019In: Earth and environmental science transactions of the Royal Society of Edinburgh, ISSN 1755-6910, E-ISSN 1755-6929, Vol. 109, no 1-2, p. 115-137Article in journal (Refereed)
    Abstract [en]

    The hypothesis that tetrapods evolved from elpistostegids during the Frasnian, in a predominantly aquatic context, has been challenged by the discovery of Middle Devonian tetrapod trackways predating the earliest body fossils of both elpistostegids and tetrapods. Here I present a new hypothesis based on an overview of the trace fossil and body fossil evidence. The trace fossils demonstrate that tetrapods were capable of performing subaerial lateral sequence walks before the end of the Middle Devonian. The derived morphological characters of elpistostegids and Devonian tetrapods are related to substrate locomotion, weight support and aerial vision, and thus to terrestrial competence, but the retention of lateral-line canals, gills and fin rays shows that they remained closely tied to the water. Elpistostegids and tetrapods both evolved no later than the beginning of the Middle Devonian. The earliest tetrapod records come from inland river basins, sabkha plains and ephemeral coastal lakes that preserve few, if any, body fossils; contemporary elpistostegids occur in deltas and the lower reaches of permanent rivers where body fossils are preserved. During the Frasnian, elpistostegids disappear and these riverine-deltaic environments are colonised by tetrapods. This replacement has, in the past, been misinterpreted as the origin of tetrapods.

  • Södersten, Jan
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Economics, Uppsala Center for Fiscal Studies.
    Why the Norwegian shareholder income tax is neutral2020In: International Tax and Public Finance, ISSN 0927-5940, E-ISSN 1573-6970, Vol. 27, no 1, p. 32-37Article in journal (Refereed)
    Abstract [en]

    This note extends the work by Sorensen (Int Tax Public Finance 12:777-801, 2005) and others by demonstrating why the Norwegian Shareholder Income Tax may be neutral between the two sources of equity funds, i.e., new share issues and retained earnings, despite the fact that the retention of earnings to finance new investment does not add to the tax benefits. The analysis crucially relies on the assumption that the deduction for the imputed rate of return is capitalized into the market prices of corporate shares. Absent capitalization, the shareholder tax is rather likely to leave the distortions caused by the double taxation of corporate source income unaffected.

  • Svanberg, Ingvar
    et al.
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Institute for Russian and Eurasian Studies.
    Berggren, Åsa
    Swedish Univ Agr Sci, Dept Ecol, Box 7070, SE-75007 Uppsala, Sweden.
    Ant schnapps for health and pleasure: the use of Formica rufa L. (Hymenoptera: Formicidae) to flavour aquavit2019In: Journal of Ethnobiology and Ethnomedicine, ISSN 1746-4269, E-ISSN 1746-4269, Vol. 15, article id 68Article in journal (Refereed)
    Abstract [en]

    Background: The relationship between humans and insects goes long back and is important. Insects provide a multitude of ecosystem services for humans, e g. by pollinating crops and decomposing matter. Our current knowledge about the cultural ecosystem services that insects provide is limited and not much examined.

    Method: Scattered ethnographical descriptions and folklore records from pre-modern Sweden and other Scandinavian countries give us insights into local knowledge and use of insects among the peasantry in various parts of the country. These data have been analysed and critically reviewed. Source pluralism has been used as a method.

    Results: The mound-building red wood ant, Formica rufa L., is one of the species that were used in Sweden for their healing properties. It was a widespread belief that the formic acid could be used to cure various diseases, especially gout and rheumatism. Both anthills and the ants themselves were used for that purpose. It was also common to flavour distilled liquor (brannvin) with ants; a remedy used for medicinal purposes. However, already in the eighteenth century, this was also used as schnapps. The cultural services provided by this species stretches throughout history and still exists today.

    Conclusion: While the use of ants in medicine has vanished, the custom of making homemade ant flavoured alcoholic beverage survives in Sweden. Nowadays it is a hobby among people who flavour their own aquavit. It is appreciated as a tasty and interesting drink.

  • Niaudet, Colin
    et al.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Immunology, Genetics and Pathology, Vascular Biology.
    Petkova, Milena
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Immunology, Genetics and Pathology, Vascular Biology.
    Jung, Bongnam
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Immunology, Genetics and Pathology, Vascular Biology.
    Lu, S.
    Max Planck Inst Heart & Lung Res, Dept Pharmacol, D-61231 Bad Nauheim, Germany.
    Laviña, Bàrbara
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Immunology, Genetics and Pathology, Vascular Biology.
    Offermanns, S.
    Max Planck Inst Heart & Lung Res, Dept Pharmacol, D-61231 Bad Nauheim, Germany.
    Brakebusch, C.
    Univ Copenhagen, Biotech Res & Innovat Ctr, Ole Maaloes Vej 5, DK-2200 Copenhagen, Denmark.
    Betsholtz, Christer
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Immunology, Genetics and Pathology, Vascular Biology.
    Adgrf5 contributes to patterning of the endothelial deep layer in retina2019In: Angiogenesis, ISSN 0969-6970, E-ISSN 1573-7209, Vol. 22, no 4, p. 491-505Article in journal (Refereed)
    Abstract [en]

    Neovascularization of the inner retinal space is a major cause of vision loss. In retinal angiomatous proliferation (RAP) syndrome, newly formed vessels originate from the retinal plexus and invade the inner retinal space. However, the molecular pathways preventing subretinal vascularization remain largely unknown. In most murine models of RAP, pathological neo-vascularization occurs concomitantly with the development of the retinal vasculature. Here, we demonstrate that disturbing the sequence of morphogenetic events that shape the three-layered retinal vascular network leads to subretinal vascularization. Sprouts emerging from the perivenous region after the first postnatal week extended toward the retinal space where they merged into the deep layer. The small GTPase Rac1 was required for the formation of these vascular extensions and the vascular inner plexus is formed coaxially to the overarching veins. The adhesion receptor Adgrf5 was highly expressed in the endothelium of the central nervous system, where it regulates blood-brain barrier formation. The vascular superficial plexus of Adgrf5 mutant mouse retinae exhibited an increased vascular density in the perivenous areas with increased projections toward the inner plexus where they subsequently created hyper-dense endothelial cells (EC) clusters. Disturbing the perivenous pool of EC thus significantly altered the inner plexus formation. These abnormalities culminated in transient vascular protrusions in the inner retinal space. Taken together, these results reveal a previously unobserved vascular morphogenetic defect in Adgrf5 knockout mice, implicating a role for ADGRF5 in the initiation of subretinal vascularization. Our findings also illustrate how vein-derived EC shape the inner retinal layer formation and could control the appearance of angiomatous malformations.

  • Rider, Sharon
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Arts, Department of Philosophy, Logic and Metaphysics.
    Modal Power, Self-Conscious Science, and the Critique of Epistemic Paternalism, or How to Change your Mind: An Interview with Steve Fuller2019In: DISPUTATIO-PHILOSOPHICAL RESEARCH BULLETIN, ISSN 2254-0601, Vol. 8, no 11, p. 597-615Article in journal (Other academic)
    Abstract [en]

    This interview with Steve Fuller was conducted by e-mail between 3 September and 31 October, 2019, Professor Steve Fuller was sent six detailed, written questions regarding a number of his fundamental concerns as these have been articulated throughout his work. The broad themes covered have to do, inter alia, with his views on philosophy as a discipline, the conditions of scientific progress, the role of traditions in human thinking, and the implications of his position on these and other issues for the future of higher education. The interview consists of the questions together with his written responses.  A list of references to published works relevant to Professor Fuller’s answers in the interview is appended.

  • Huang, Hongyun
    et al.
    Peoples Liberat Army Gen Hosp, Inst Neurorestoratol, Med Ctr 3, 69 Yongding Rd, Beijing 100039, Peoples R China;Hongtianji Neurosci Acad, Lingxiu Bldg,1 Gucheng St, Beijing, Peoples R China.
    Young, Wise
    Rutgers State Univ, WM Keck Ctr Collaborat Neurosci, Piscataway, NJ USA.
    Skaper, Stephen
    Univ Padua, Dept Pharmaceut & Pharmacol Sci, Padua, Italy.
    Chen, Lin
    Tsinghua Univ, Dept Neurosurg, Yuquan Hosp, Beijing, Peoples R China.
    Moviglia, Gustavo
    Maimonides Univ, Ctr Res & Engineer Tissues & Cellular Therapy, Buenos Aires, DF, Argentina.
    Saberi, Hooshang
    Univ Tehran Med Sci, Brain & Spinal Injury Res Ctr, Dept Neurosurg, Tehran, Iran.
    Al-Zoubi, Ziad
    Al Saif Med Ctr, Jordan Ortho & Spinal Ctr, Amman, Jordan.
    Sharma, Hari Shanker
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Surgical Sciences, Anaesthesiology and Intensive Care.
    Muresanu, Dafin
    Univ Med & Pharm, Dept Neurosci Iuliu Hatieganu, Cluj Napoca, Romania.
    Sharma, Alok
    LTMG Hosp, LTM Med Coll, Dept Neurosurg, Mumbai, Maharashtra, India.
    El Masry, Wagih
    Robert Jones & Agnes Hunt Orthopaed Hosp, Spinal Injuries Unit, Oswestry, Shrops, England.
    Feng, Shiqing
    Tianjin Med Univ, Dept Orthopaed, Gen Hosp, 154 Anshan Rd, Tianjin 300052, Peoples R China.
    Clinical Neurorestorative Therapeutic Guidelines for Spinal Cord Injury (IANR/CANR version 2019)2020In: JOURNAL OF ORTHOPAEDIC TRANSLATION, ISSN 2214-031X, Vol. 20, p. 14-24Article, review/survey (Refereed)
    Abstract [en]

    Functional restoration after spinal cord injury (SCI) is one of the most challenging tasks in neurological clinical practice. With a view to exploring effective neurorestorative methods in the acute, subacute, and chronic phases of SCI, "Clinical Therapeutic Guidelines of Neurorestoration for Spinal Cord Injury (China Version 2016)" was first proposed in 2016 by the Chinese Association of Neurorestoratology (CANR). Given the rapid advances in this field in recent years, the International Association of Neurorestoratology (IANR) and CANR formed and approved the "Clinical Neurorestorative Therapeutic Guidelines for Spinal Cord Injury (IANR/CANR version 2019)". These guidelines mainly introduce restoring damaged neurological structure and functions by varying neurorestorative strategies in acute, subacute, and chronic phases of SCI. These guidelines can provide a neurorestorative therapeutic standard or reference for clinicians and researchers in clinical practice to maximally restore functions of patients with SCI and improve their quality of life. The translational potential of this article: This guideline provided comprehensive management strategies for SCI, which contains the evaluation and diagnosis, pre-hospital first aid, treatments, rehabilitation training, and complications management. Nowadays, amounts of neurorestorative strategies have been demonstrated to be benefit in promoting the functional recovery and improving the quality of life for SCI patients by clinical trials. Also, the positive results of preclinical research provided lots of new neurorestorative strategies for SCI treatment. These promising neurorestorative strategies are worthy of translation in the future and can promote the advancement of SCI treatments.

  • Martinez-Sancho, Elisabet
    et al.
    Swiss Fed Inst Forest Snow & Landscape Res WSL, Zurcherstr 111, CH-8903 Birmensdorf, Switzerland.
    Slamova, Lenka
    Morganti, Sandro
    Grefen, Claudio
    Philipps Univ Marburg, Dept Biol, Karl von Frisch Str 8, D-35043 Marburg, Germany.
    Carvalho, Barbara
    Natl Museum Nat Sci MNCN CSIC, Dept Biogeog & Global Change, Serrano 115 Dpdo, Madrid 28006, Spain.
    Dauphin, Benjamin
    Swiss Fed Inst Forest Snow & Landscape Res WSL, Zurcherstr 111, CH-8903 Birmensdorf, Switzerland.
    Rellstab, Christian
    Swiss Fed Inst Forest Snow & Landscape Res WSL, Zurcherstr 111, CH-8903 Birmensdorf, Switzerland.
    Gugerli, Felix
    Swiss Fed Inst Forest Snow & Landscape Res WSL, Zurcherstr 111, CH-8903 Birmensdorf, Switzerland.
    Opgenoorth, Lars
    Philipps Univ Marburg, Dept Biol, Karl von Frisch Str 8, D-35043 Marburg, Germany.
    Heer, Katrin
    Philipps Univ Marburg, Dept Biol, Karl von Frisch Str 8, D-35043 Marburg, Germany.
    Knutzen, Florian
    Bavarian Off Forest Seeding & Planting ASP, Forstamtspl 1, D-83317 Teisendorf, Germany.
    von Arx, Georg
    Swiss Fed Inst Forest Snow & Landscape Res WSL, Zurcherstr 111, CH-8903 Birmensdorf, Switzerland.
    Valladares, Fernando
    Natl Museum Nat Sci MNCN CSIC, Dept Biogeog & Global Change, Serrano 115 Dpdo, Madrid 28006, Spain.
    Cavers, Stephen
    Ctr Ecol & Hydrol NERC, Edinburgh EH26 0QB, Midlothian, Scotland.
    Fady, Bruno
    INRA, Domaine St Paul, Site Agroparc, F-84914 Avignon, France.
    Alia, Ricardo
    Ctr Invest Forestal INIA CIFOR, Inst Nacl Invest & Tecnol Agr & Alimentaria, Ctra Coruna Km 7-5, Madrid 28040, Spain.
    Aravanopoulos, Filippos
    Aristotle Univ Thessaloniki, Sch Forestry & Nat Environm, Lab Forest Genet & Tree Breeding, Thessaloniki 54124, Greece.
    Avanzi, Camilla
    Natl Res Council CNR, Inst Biosci & BioResources, Via Madonna Piano 10, I-50019 Sesto Fiorentino, Italy.
    Bagnoli, Francesca
    Natl Res Council CNR, Inst Biosci & BioResources, Via Madonna Piano 10, I-50019 Sesto Fiorentino, Italy.
    Barbas, Evangelos
    Aristotle Univ Thessaloniki, Sch Forestry & Nat Environm, Lab Forest Genet & Tree Breeding, Thessaloniki 54124, Greece.
    Bastien, Catherine
    INRA, Ave Pomme Pin 2163, F-45075 Orleans, France.
    Benavides, Raquel
    Natl Museum Nat Sci MNCN CSIC, Dept Biogeog & Global Change, Serrano 115 Dpdo, Madrid 28006, Spain.
    Bernier, Frederic
    INRA, Route Arcachon 69, F-33610 Cestas, France.
    Bodineau, Guillaume
    INRA, Ave Pomme Pin 2163, F-45075 Orleans, France.
    Bastias, Cristina C.
    Natl Museum Nat Sci MNCN CSIC, Dept Biogeog & Global Change, Serrano 115 Dpdo, Madrid 28006, Spain.
    Charpentier, Jean-Paul
    INRA, Ave Pomme Pin 2163, F-45075 Orleans, France.
    Climent, Jose M.
    Ctr Invest Forestal INIA CIFOR, Inst Nacl Invest & Tecnol Agr & Alimentaria, Ctra Coruna Km 7-5, Madrid 28040, Spain.
    Correard, Marianne
    INRA, Domaine St Paul, Site Agroparc, F-84914 Avignon, France.
    Courdier, Florence
    INRA, Domaine St Paul, Site Agroparc, F-84914 Avignon, France.
    Danusevicius, Darius
    Vytautas Magnus Univ, Studentu St 11, LT-53361 Akademija, Lithuania.
    Farsakoglou, Anna-Maria
    Aristotle Univ Thessaloniki, Sch Forestry & Nat Environm, Lab Forest Genet & Tree Breeding, Thessaloniki 54124, Greece.
    Garcia del Barrio, Jose M.
    Ctr Invest Forestal INIA CIFOR, Inst Nacl Invest & Tecnol Agr & Alimentaria, Ctra Coruna Km 7-5, Madrid 28040, Spain.
    Gilg, Olivier
    INRA, Domaine St Paul, Site Agroparc, F-84914 Avignon, France.
    Gonzalez-Martinez, Santiago C.
    INRA, Route Arcachon 69, F-33610 Cestas, France.
    Gray, Alan
    Ctr Ecol & Hydrol NERC, Edinburgh EH26 0QB, Midlothian, Scotland.
    Hartleitner, Christoph
    LIECO GmbH & Co KG, Forstgarten 1, A-8775 Kalwang, Austria.
    Hurel, Agathe
    INRA, Route Arcachon 69, F-33610 Cestas, France.
    Jouineau, Arnaud
    INRA, Domaine St Paul, Site Agroparc, F-84914 Avignon, France.
    Kaerkkaeinen, Katri
    Univ Oulu, Nat Resources Inst Finland, Paavo Havaksen Tie 3, Oulu 90014, Finland.
    Kujala, Sonja T.
    Univ Oulu, Nat Resources Inst Finland, Paavo Havaksen Tie 3, Oulu 90014, Finland.
    Labriola, Mariaceleste
    Natl Res Council CNR, Inst Biosci & BioResources, Via Madonna Piano 10, I-50019 Sesto Fiorentino, Italy.
    Lascoux, Martin
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Plant Ecology and Evolution.
    Lefebvre, Marlene
    INRA, Ave Pomme Pin 2163, F-45075 Orleans, France.
    Lejeune, Vincent
    INRA, Ave Pomme Pin 2163, F-45075 Orleans, France.
    Liesebach, Mirko
    Thunen Inst Forest Genet, Sieker Landstr 2, D-22927 Grosshansdorf, Germany.
    Malliarou, Ermioni
    Aristotle Univ Thessaloniki, Sch Forestry & Nat Environm, Lab Forest Genet & Tree Breeding, Thessaloniki 54124, Greece.
    Mariotte, Nicolas
    INRA, Domaine St Paul, Site Agroparc, F-84914 Avignon, France.
    Matesanz, Silvia
    Univ Rey Juan Carlos, Area Biodiversidad & Conservac, Calle Tulipan S-N, Mostoles 28933, Spain.
    Myking, Tor
    Norwegian Inst Bioecon Res NIBIO, Div Forestry & Forest Resources, POB 115, N-1431 As, Norway.
    Notivol, Eduardo
    Ctr Invest & Tecnol Agroalimentaria Aragon, Unidad Recursos Forest CITA, Avda Montanana 930, Zaragoza 50059, Spain.
    Pakull, Birte
    Thunen Inst Forest Genet, Sieker Landstr 2, D-22927 Grosshansdorf, Germany.
    Piotti, Andrea
    Natl Res Council CNR, Inst Biosci & BioResources, Via Madonna Piano 10, I-50019 Sesto Fiorentino, Italy.
    Pringarbe, Mehdi
    INRA, Domaine St Paul, Site Agroparc, F-84914 Avignon, France.
    Pyhaejaervi, Tanja
    Univ Oulu, Pentti Kaiteran Katu 1, Oulu 90014, Finland.
    Raffin, Annie
    INRA, Route Arcachon 69, F-33610 Cestas, France.
    Ramirez-Valiente, Jose A.
    Ctr Invest Forestal INIA CIFOR, Inst Nacl Invest & Tecnol Agr & Alimentaria, Ctra Coruna Km 7-5, Madrid 28040, Spain.
    Ramskogler, Kurt
    LIECO GmbH & Co KG, Forstgarten 1, A-8775 Kalwang, Austria.
    Robledo-Arnuncio, Juan J.
    Ctr Invest Forestal INIA CIFOR, Inst Nacl Invest & Tecnol Agr & Alimentaria, Ctra Coruna Km 7-5, Madrid 28040, Spain.
    Savolainen, Outi
    Univ Oulu, Pentti Kaiteran Katu 1, Oulu 90014, Finland.
    Schueler, Silvio
    Austrian Res Ctr Forests BFW, Seckendorff Gudent Weg 8, A-1131 Vienna, Austria.
    Semerikov, Vladimir
    RAS, Ural Branch, Inst Plant & Anim Ecol, 8 Marta St 202, Ekaterinburg 620144, Russia.
    Spanu, Ilaria
    Natl Res Council CNR, Inst Biosci & BioResources, Via Madonna Piano 10, I-50019 Sesto Fiorentino, Italy.
    Thevenet, Jean
    INRA, Domaine St Paul, Site Agroparc, F-84914 Avignon, France.
    Mette Tollefsrud, Mari
    Univ Rey Juan Carlos, Area Biodiversidad & Conservac, Calle Tulipan S-N, Mostoles 28933, Spain.
    Turion, Norbert
    INRA, Domaine St Paul, Site Agroparc, F-84914 Avignon, France.
    Veisse, Dominique
    INRA, Ave Pomme Pin 2163, F-45075 Orleans, France.
    Vendramin, Giovanni Giuseppe
    Natl Res Council CNR, Inst Biosci & BioResources, Via Madonna Piano 10, I-50019 Sesto Fiorentino, Italy.
    Villar, Marc
    INRA, Ave Pomme Pin 2163, F-45075 Orleans, France.
    Westin, Johan
    Skogforsk, Tomterna 1, S-91821 Savar, Sweden.
    Fonti, Patrick
    Swiss Fed Inst Forest Snow & Landscape Res WSL, Zurcherstr 111, CH-8903 Birmensdorf, Switzerland.
    The GenTree Dendroecological Collection, tree-ring and wood density data from seven tree species across Europe2020In: Scientific Data, E-ISSN 2052-4463, Vol. 7, article id 1Article in journal (Refereed)
    Abstract [en]

    The dataset presented here was collected by the GenTree project (EU-Horizon 2020), which aims to improve the use of forest genetic resources across Europe by better understanding how trees adapt to their local environment. This dataset of individual tree-core characteristics including ring-width series and whole-core wood density was collected for seven ecologically and economically important European tree species: silver birch (Betula pendula), European beech (Fagus sylvatica), Norway spruce (Picea abies), European black poplar (Populus nigra), maritime pine (Pinus pinaster), Scots pine (Pinus sylvestris), and sessile oak (Quercus petraea). Tree-ring width measurements were obtained from 3600 trees in 142 populations and whole-core wood density was measured for 3098 trees in 125 populations. This dataset covers most of the geographical and climatic range occupied by the selected species. The potential use of it will be highly valuable for assessing ecological and evolutionary responses to environmental conditions as well as for model development and parameterization, to predict adaptability under climate change scenarios.

  • Sakr, Mahmoud A.
    et al.
    AUC, Grad Program Nanotechnol, New Cairo 11835, Egypt;AUC, Dept Mech Engn, New Cairo 11835, Egypt.
    Elgammal, Karim
    KTH Royal Inst Technol, Sch Engn Sci, Dept Appl Phys, Electrum 229, SE-16440 Kista, Sweden;KTH Royal Inst Technol, Swedish E Sci Res Ctr SeRC, SE-10044 Stockholm, Sweden.
    Delin, Anna
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory. KTH Royal Inst Technol, Sch Engn Sci, Dept Appl Phys, Electrum 229, SE-16440 Kista, Sweden;KTH Royal Inst Technol, Swedish E Sci Res Ctr SeRC, SE-10044 Stockholm, Sweden.
    Serry, Mohamed
    AUC, Dept Mech Engn, New Cairo 11835, Egypt.
    Performance-Enhanced Non-Enzymatic Glucose Sensor Based on Graphene-Heterostructure2020In: Sensors, ISSN 1424-8220, E-ISSN 1424-8220, Vol. 20, no 1, article id 145Article in journal (Refereed)
    Abstract [en]

    Non-enzymatic glucose sensing is a crucial field of study because of the current market demand. This study proposes a novel design of glucose sensor with enhanced selectivity and sensitivity by using graphene Schottky diodes, which is composed of graphene (G)/platinum oxide (PtO)/n-silicon (Si) heterostructure. The sensor was tested with different glucose concentrations and interfering solutions to investigate its sensitivity and selectivity. Different structures of the device were studied by adjusting the platinum oxide film thickness to investigate its catalytic activity. It was found that the film thickness plays a significant role in the efficiency of glucose oxidation and hence in overall device sensitivity. 0.8-2 mu A output current was obtained in the case of 4-10 mM with a sensitivity of 0.2 mu A/mM.cm(2). Besides, results have shown that 0.8 mu A and 15 mu A were obtained by testing 4 mM glucose on two different PtO thicknesses, 30 nm and 50 nm, respectively. The sensitivity of the device was enhanced by 150% (i.e., up to 30 mu A/mM.cm(2)) by increasing the PtO layer thickness. This was attributed to both the increase of the number of active sites for glucose oxidation as well as the increase in the graphene layer thickness, which leads to enhanced charge carriers concentration and mobility. Moreover, theoretical investigations were conducted using the density function theory (DFT) to understand the detection method and the origins of selectivity better. The working principle of the sensors puts it in a competitive position with other non-enzymatic glucose sensors. DFT calculations provided a qualitative explanation of the charge distribution across the graphene sheet within a system of a platinum substrate with D-glucose molecules above. The proposed G/PtO/n-Si heterostructure has proven to satisfy these factors, which opens the door for further developments of more reliable non-enzymatic glucometers for continuous glucose monitoring systems.

  • Gedin, David
    Replik till Åsa Warnqvist2019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 442-443Article, book review (Other academic)
  • Lysell, Roland
    Marianne Stidsen, Levende litterater. Samtaler om kritikkens guldalder. U-Press. København 20182019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 437-442Article, book review (Other academic)
  • Warnqvist, Åsa
    Slutreplik till David Gedin2019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 443-443Article, book review (Other academic)
  • Olsson, Ulf
    Birthe Sjöberg, Dialog eller dynamit. Viktor Rydberg och August Strindberg – förtryckets fiender. Gidlunds förlag. Möklinta 20182019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 434-437Article, book review (Other academic)
  • Sävborg, Daniel
    Nordic Literature. A Comparative History. Volume I: Spatial nodes. Red. Thomas A. DuBois & Dan Ringgaard. John Benjamin Publishing Company. Amsterdam and Philadelphia 20172019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 429-431Article, book review (Other academic)
  • Haverty Rugg, Linda
    Anna Sofia Rossholm, Ingmar Bergman och den lekfulla skriften. Studier av anteckningar, utkast och filmidéer i arkivets samlingar. Makadam. Göteborg och Stockholm 20172019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 431-434Article, book review (Other academic)
  • Sävborg, Daniel
    Nordens litteratur. Red. Margareta Petersson och Rikard Schönström. Studentlitteratur. Lund 20172019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 422-429Article, book review (Other academic)
  • Jonsson, Bibi
    Martin Kylhammar, Ett hemligt liv. Verner von Heidenstam och Kate Bang. Albert Bonniers förlag. Stockholm 20192019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 412-417Article, book review (Other academic)
  • Sjöberg, Birthe
    Monica Lauritzen, Karl Warburg. Den varsamme vägvisaren. Albert Bonniers förlag. Stockholm 20182019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 418-422Article, book review (Other academic)
  • Bäckström, Per
    Anders Juhl Rasmussen, Under stadig skælven. Peter Seebergs arkiv og værk. Syddansk Universitetsforlag. Odense 20182019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 406-412Article, book review (Other academic)
  • Israelsson, Per
    Jonas Ingvarsson, Bomber, virus, kuriosakabinett. Texter om digital epistemologi. Rojal Förlag. Göteborg 20182019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 401-406Article, book review (Other academic)
  • Öhrberg, Ann
    Christina Holst Færch, Smædeskrifter, sladder og erotiske vers i 1700-tallet. Hans Nordrups forfatterskab. Med et udvalg af hans digte. Tidlig Moderne, band 14. Museum Tusculanums forlag. Köpenhamn 20192019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 396-399Article, book review (Other academic)
  • Henning, Peter
    Carin Franzén, När vi talar om oss själva. Nedslag i subjektivitetens historia från Montaigne till Norén. Ariel litterär kritik 10. Ariel förlag. Linderöd 20182019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 390-392Article, book review (Other academic)
  • Öhman, Marie
    Henning Howlid Wærp, ”Hele livet en vandrer i naturen”. Økokritiske lesninger i Knut Hamsuns forfatterskap. Orkana Akademisk. Stamsund 20182019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 399-401Article, book review (Other academic)
  • Dahl, Per
    Paula Henrikson, Detta tryckpapperstidevarv. Litterär editionshistoria i Sverige under det långa 1800-talet. Gidlunds förlag. Möklinta 20182019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 393-396Article, book review (Other academic)
  • Svensson, Christina
    Esaias Tegnérs kyrkliga tal del I och II, åren 1813–1823 samt 1824–1830. Utgivna av Barbro Wallgren Hemlin på uppdrag av Tegnérsamfundet. Artos. Skellefteå 2017 och 20192019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 383-387Article, book review (Other academic)
  • Lenemark, Christian
    Margaretha Fahlgren & Birgitta Wistrand, Älska eller älskas. Makt och känslor i politiska biografier. Appell förlag. Stockholm 20182019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 387-390Article, book review (Other academic)
  • Lindberg, Bo
    Efter Tegnér. Experiment med traditionen. Red. Alfred Sjödin & Jimmie Svensson. Absalon. Lund 20182019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 382-383Article, book review (Other academic)
  • Stenström, Thure
    Jean−François Battail, Alfred Nobel, inconnu célèbre. Regards sur sa vie, son oeuvre et sa postérité. Sorbonne Université Press. Paris 20182019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 376-378Article, book review (Other academic)
  • Haettner Aurelius, Eva
    Almqvistvariationer. Receptionsstudier och omläsningar. Red. Anders Burman och Jon Viklund. Almqviststudier 7. Makadam. Göteborg och Stockholm 20182019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 371-376Article, book review (Other academic)
  • Pettersson, Jonatan
    Alexanderlegenderna i tid och rum. Alexander den stores gränslösa historia. Red. Karin Hult & Gunhild Vidén. Appell förlag. Stockholm 20182019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 367-370Article, book review (Other academic)
  • Rydén, Per
    Böckernas tid. Svenska Förläggareföreningen och svensk bokmarknad sedan 1943. Red. Johan Svedjedal. Natur & Kultur. Stockholm 20182019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 378-382Article, book review (Other academic)
  • Mehrens, Patrik
    Lisa Schmidt, Radera. Tippex, tusch, tråd och andra poetiska tekniker. Glänta produktion. Göteborg 20182019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 363-366Article, book review (Other academic)
  • Delabastita, Dirk
    Lars Liljegren, The Taming of a Viking: August Strindberg, Translation and Post-Victorian Censorship. Linköping Studies in Arts and Sciences 754; Studies in Language and Culture 31. Department of Culture and Communication, Linköping University. Linköping 20182019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 348-353Article, book review (Other academic)
  • Kristensson Uggla, Bengt
    Isak Hyltén-Cavallius, Den ofärdiga vetenskapen. Om krisen i svensk litteraturforskning och litteraturtolkningens villkor. Critica Litterarum Lundensis 16, Lunds universitet. Lund 20182019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 337-344Article, book review (Other academic)
  • Björklund, Jenny
    Hilda Jakobsson, Jag var kvinna. Flickor, kärlek och sexualitet i Agnes von Krusenstjernas tidiga romaner. Stockholms universitet. Makadam. Göteborg och Stockholm 20182019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 344-348Article, book review (Other academic)
  • Ohlsson, Anders
    Sofia Pulls, Skrivande och blivande. Konstruktioner av skönlitterärt skrivande i handböcker och läromedel 1979–2015. Umeå Studies in Educational Sciences 31. Umeå 20192019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 358-363Article, book review (Other academic)
  • Englund, Axel
    Victor Malm, Är det detta som kallas postmodernism? En studie i Katarina Frostensons och Stig Larssons diktning. Lunds Universitet. Lund 20192019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 353-358Article, book review (Other academic)
  • Bodin, Helena
    Olga Engfelt, Barndomens poetik. Oscar Parlands Riki-trilogi i den ryska litterära kontexten. Åbo akademis förlag. Åbo 20182019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 333-337Article, book review (Other academic)
  • Franzén, Carin
    Matilda Amundsen Bergström, Som en Sapfo. Publiceringsstrategier, självframställning och retorik hos tre tidigmoderna kvinnliga författare. Avhandlingar framlagda vid Institutionen för litteratur, idéhistoria och religion 59, Göteborgs universitet. Göteborg 20192019In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 140, p. 329-333Article, book review (Other academic)
  • Aydemir, Ufuk
    et al.
    Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China;Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Hubei, Peoples R China.
    Mandal, Tanumoy
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics. Univ Delhi, Dept Phys & Astrophys, Delhi 110007, India.
    Mitra, Subhadip
    Int Inst Informat Technol, Ctr Computat Nat Sci & Bioinformat, Hyderabad 500032, Telangana, India.
    Addressing the R-D(*) anomalies with an S-1 leptoquark from SO(10) grand unification2020In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 101, no 1, article id 015011Article in journal (Refereed)
    Abstract [en]

    Motivated by the R-D(*) anomalies, we investigate an SO(10) grand unification scenario where a charge -1/3 scalar leptoquark (S-1) remains as the only new physics candidate at the TeV scale. This leptoquark along with the Standard Model (SM) Higgs doublet originates from the same ten-dimensional real scalar multiplet in the SO(10) grand unification framework taking its mass close to the electroweak scale. We explicitly show how the gauge coupling unification is achieved with only one intermediate symmetrybreaking scale at which the Pati-Salam gauge group is broken into the SM group. We investigate the phenomenological implications of our scenario and show that an S-1 with a specific Yukawa texture can explain the R-D(*) anomalies. We perform a multiparameter scan considering the relevant flavor constraints on R-D(*), F-L(D*), P-tau(D*) and R-K(*)(vv) as well as the constraint coming from the Z -> tau tau decay and the latest Dr resonance search data at the LHC. Our analysis shows that a single leptoquark solution to the observed R-D(*) anomalies with S-1 is still a viable solution.

  • Ho, Phay J.
    et al.
    Argonne Natl Lab, Chem Sci & Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
    Daurer, Benedikt J.
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Cell and Molecular Biology, Molecular biophysics.
    Hantke, Max
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Cell and Molecular Biology, Molecular biophysics. Univ Oxford, Chem Res Lab, Dept Chem, 12 Mansfield Rd, Oxford OX1 3TA, England.
    Bielecki, Johan
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Cell and Molecular Biology, Molecular biophysics. European XFEL GmbH, Holzkoppel 4, D-22869 Schenefeld, Germany.
    Al Haddad, Andre
    Argonne Natl Lab, Chem Sci & Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
    Bucher, Maximilian
    Argonne Natl Lab, Chem Sci & Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
    Doumy, Gilles
    Argonne Natl Lab, Chem Sci & Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
    Ferguson, Ken R.
    SLAC Natl Accelerator Lab, Linac Coherent Light Source, Menlo Pk, CA 94025 USA.
    Flückiger, Leonie
    La Trobe Univ, ARC Ctr Excellence Adv Mol Imaging, Bundoora, Vic 3086, Australia.
    Gorkhover, Tais
    SLAC Natl Accelerator Lab, Stanford Pulse Inst, Menlo Pk, CA 94025 USA.
    Iwan, Bianca
    SLAC Natl Accelerator Lab, Stanford Pulse Inst, Menlo Pk, CA 94025 USA.
    Knight, Christopher
    Argonne Natl Lab, Computat Sci Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
    Moeller, Stefan
    SLAC Natl Accelerator Lab, Linac Coherent Light Source, Menlo Pk, CA 94025 USA.
    Osipov, Timur
    SLAC Natl Accelerator Lab, Linac Coherent Light Source, Menlo Pk, CA 94025 USA.
    Ray, Dipanwita
    SLAC Natl Accelerator Lab, Linac Coherent Light Source, Menlo Pk, CA 94025 USA.
    Southworth, Stephen H.
    Argonne Natl Lab, Chem Sci & Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
    Svenda, Martin
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Cell and Molecular Biology, Molecular biophysics.
    Timneanu, Nicusor
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Cell and Molecular Biology, Molecular biophysics. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
    Ulmer, Anatoli
    Tech Univ Berlin, Inst Opt & Atomare Phys, D-10623 Berlin, Germany.
    Walter, Peter
    SLAC Natl Accelerator Lab, Linac Coherent Light Source, Menlo Pk, CA 94025 USA.
    Hajdu, Janos
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Cell and Molecular Biology, Molecular biophysics.
    Young, Linda
    Argonne Natl Lab, Chem Sci & Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA;Univ Chicago, Dept Phys, Chicago, IL 60637 USA;Univ Chicago, James Franck Inst, 5640 S Ellis Ave, Chicago, IL 60637 USA.
    Maia, Filipe
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Cell and Molecular Biology, Molecular biophysics.
    Bostedt, Christoph
    Argonne Natl Lab, Chem Sci & Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA;Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA;Paul Scherrer Inst, CH-5232 Villigen, Switzerland;Ecole Polytech Fed Lausanne, LUXS Lab Ultrafast Xray Sci, Inst Chem Sci & Engn, CH-1015 Lausanne, Switzerland.
    The role of transient resonances for ultra-fast imaging of single sucrose nanoclusters2020In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 11, article id 167Article in journal (Refereed)
    Abstract [en]

    Intense x-ray free-electron laser (XFEL) pulses hold great promise for imaging function in nanoscale and biological systems with atomic resolution. So far, however, the spatial resolution obtained from single shot experiments lags averaging static experiments. Here we report on a combined computational and experimental study about ultrafast diffractive imaging of sucrose clusters which are benchmark organic samples. Our theoretical model matches the experimental data from the water window to the keV x-ray regime. The large-scale dynamic scattering calculations reveal that transient phenomena driven by non-linear x-ray interaction are decisive for ultrafast imaging applications. Our study illuminates the complex interplay of the imaging process with the rapidly changing transient electronic structures in XFEL experiments and shows how computational models allow optimization of the parameters for ultrafast imaging experiments. X-ray free electron lasers provide high photon flux to explore single particle diffraction imaging of biological samples. Here the authors present dynamic electronic structure calculations and benchmark them to single-particle XFEL diffraction data of sucrose clusters to predict optimal single-shot imaging conditions.

  • Tengdin, Phoebe
    et al.
    Univ Colorado, Dept Phys, Boulder, CO 80309 USA;Univ Colorado, JILA, Boulder, CO 80309 USA;NIST, Boulder, CO 80309 USA.
    Gentry, Christian
    Univ Colorado, Dept Phys, Boulder, CO 80309 USA;Univ Colorado, JILA, Boulder, CO 80309 USA;NIST, Boulder, CO 80309 USA.
    Blonsky, Adam
    Univ Colorado, Dept Phys, Boulder, CO 80309 USA;Univ Colorado, JILA, Boulder, CO 80309 USA;NIST, Boulder, CO 80309 USA.
    Zusin, Dmitriy
    Univ Colorado, Dept Phys, Boulder, CO 80309 USA;Univ Colorado, JILA, Boulder, CO 80309 USA;NIST, Boulder, CO 80309 USA.
    Gerrity, Michael
    Univ Colorado, Dept Phys, Boulder, CO 80309 USA;Univ Colorado, JILA, Boulder, CO 80309 USA;NIST, Boulder, CO 80309 USA.
    Hellbrück, Lukas
    Univ Kaiserslautern, Res Ctr OPTIMAS, Erwin Schroedinger Str 46, D-67663 Kaiserslautern, Germany.
    Hofherr, Moritz
    Univ Kaiserslautern, Res Ctr OPTIMAS, Erwin Schroedinger Str 46, D-67663 Kaiserslautern, Germany.
    Shaw, Justin
    NIST, Quantum Electromagnet Div, Boulder, CO 80305 USA.
    Kvashnin, Yaroslav
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
    Delczeg-Czirjak, Erna Krisztina
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
    Arora, Monika
    NIST, Quantum Electromagnet Div, Boulder, CO 80305 USA.
    Nembach, Hans
    Univ Colorado, Dept Phys, Boulder, CO 80309 USA;Univ Colorado, JILA, Boulder, CO 80309 USA;NIST, Boulder, CO 80309 USA;NIST, Quantum Electromagnet Div, Boulder, CO 80305 USA.
    Silva, Tom J.
    NIST, Quantum Electromagnet Div, Boulder, CO 80305 USA.
    Mathias, Stefan
    Georg August Univ Gottingen, Phys Inst 1, Friedrich Hund Pl 1, D-37077 Gottingen, Germany.
    Aeschlimann, Martin
    Univ Kaiserslautern, Res Ctr OPTIMAS, Erwin Schroedinger Str 46, D-67663 Kaiserslautern, Germany.
    Kapteyn, Henry C.
    Univ Colorado, Dept Phys, Boulder, CO 80309 USA;Univ Colorado, JILA, Boulder, CO 80309 USA;NIST, Boulder, CO 80309 USA.
    Thonig, Danny
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory. Orebro Univ, Sch Sci & Technol, SE-70182 Orebro, Sweden.
    Koumpouras, Konstantinos
    Lulea Univ, Dept Engn Sci & Math, SE-E186, Lulea, Sweden.
    Eriksson, Olle
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory. Orebro Univ, Sch Sci & Technol, SE-70182 Orebro, Sweden.
    Murnane, Margaret M.
    Univ Colorado, Dept Phys, Boulder, CO 80309 USA;Univ Colorado, JILA, Boulder, CO 80309 USA;NIST, Boulder, CO 80309 USA.
    Direct light-induced spin transfer between different elements in a spintronic Heusler material via femtosecond laser excitation2020In: Science Advances, E-ISSN 2375-2548, Vol. 6, no 3, article id eaaz1100Article in journal (Refereed)
    Abstract [en]

    Heusler compounds are exciting materials for future spintronics applications because they display a wide range of tunable electronic and magnetic interactions. Here, we use a femtosecond laser to directly transfer spin polarization from one element to another in a half-metallic Heusler material, Co2MnGe. This spin transfer initiates as soon as light is incident on the material, demonstrating spatial transfer of angular momentum between neighboring atomic sites on time scales < 10 fs. Using ultrafast high harmonic pulses to simultaneously and independently probe the magnetic state of two elements during laser excitation, we find that the magnetization of Co is enhanced, while that of Mn rapidly quenches. Density functional theory calculations show that the optical excitation directly transfers spin from one magnetic sublattice to another through preferred spin-polarized excitation pathways. This direct manipulation of spins via light provides a path toward spintronic devices that can operate on few-femtosecond or faster time scales.

  • Han, Wenkai
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology.
    Social Signifiers of Interactive Advertising in Mobile GamingAn Empirical Study on Gamers’ Perception towards Interactive Advertisements: Social Signifiers of Interactive Advertising in Mobile GamingAn Empirical Study on Gamers’ Perception towards Interactive Advertisements2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    With the rapid growth of mobile games, more and more people are involved ingaming. As a result, a growing number of advertisers seek to promote their brands and products in mobile games. However, as previous studies on product placements were mostly focused on traditional media formats like television and movies, the unique feature of interactivity was largely missing among current studies on in-game advertising. This study aimed to investigate how interactive styles of advertisements would influence gamers’ perception of the brands as well as the gaming experience.We took the perspective from interactivity and discussed how affordances and signifiers could be connected to the interactivity in gaming. Subsequently, we developed a prototype with five different interactive advertisements for our experiments. After an experiment combined with observation, semi-structured interview and survey on 25 participants, we produced our results through qualitative thematic analysis and quantitative statistical analysis on the gathered data. Through the analysis, we found an underlying connection between the social signifiers connected to the advertisements and the users’ perception of the corresponding brands. This study produced meaningful insights on how interactive advertisements would influence gaming experiences and users’ perception of the advertised brands

  • Litsmark, Sofia
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Investigating the relationship between circulation patterns and cloudburst character in a changing climate2020Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The consequences of extreme weather in terms of heavy precipitation and flooding are devastating in both rural and urban areas. The cost on society to handle the damages are substantial. It is therefore of high interest to further investigate the mechanisms behind these extreme events. With a better understanding and future forecasting of heavy precipitation events (cloudbursts), the urban areas can adapt their infrastructure to future demands which would make the cities less vulnerable to flooding.

    To better understand the mechanisms behind extreme precipitation scientists have studied North Atlantic atmospheric circulations and found a relation between those atmospheric circulations and cloudbursts in northern Europe. Furthermore, earlier studies have shown an indication of more frequent atmospheric circulation that causes cloudbursts in northern Europe in the future. Wei Yang at Swedish Meteorological and Hydrological Insti- tute (SMHI) defined twelve new circulation pattern classes of North Atlantic scale, and this study aimed to investigate if there is a relation between those classes of circulation patterns and five empirical hyetographs generated by Olsson et al. (2017). This was ac- complished by investigating what circulation pattern was present the day the cloudburst occurred. If a relation was found, the second objective was to see how the future fre- quencies of the circulation patterns would affect the distribution of hyetograph shape. To investigate future frequencies of the circulation patterns results from climate models were used.

    The result showed an indication of a relation between circulation patterns and cloudburst character. The number of events was too small for any robust conclusions to be made, but tendencies were found, and further investigation could show more interesting results. Based on the assumption that the frequency of cloudbursts for each circulation pattern would stay the same in the future, the result in this study showed that the distribution of hyetograph shape would not change considerably in the future.

  • Grönberg, Axel
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology.
    Emerging Non-Volatile Memory and Initial Experiences with PCM Main Memory: Emerging Non-Volatile Memory and Initial Experiences with PCM Main Memory2020Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    A group of new non-volatile memory technologies with characteristics making them worthy of consideration for different parts of the memory hierarchy, including the main memory, are emerging. In this thesis I discuss the state of STT-RAM, ReRAM and PCM technologies which are three of the front runners in this group of new technologies. I also simulate the performance of PCM used as main memory using Intel’s binary instrumentation framework Pin and compare it to DRAM to explore three research questions. Firstly, in the case of horizontally integrated PCM and DRAM I test a data mapping policy where an application’s stack is mapped to DRAM and the heap is mapped to PCM. I find that in the case of my simulation this mapping have no benefits since most of the stack is continually kept in the cache which causes the DRAM to end up unutilized. Secondly, I compare the read latency between PCM and DRAM and find an average increase 48 %for PCM. Thirdly, I compare the energy costs of two write policiesfor PCM. The first being write-through of dirty bytes at byte granularity and the second being full row buffer write-back. I find that the first method has on average less than a third of the energy cost compared to the second method.T

  • Carlsson, Gustav
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Materials Science and Engineering, Applied Material Science.
    An MST approach to skin perforation using wet etched silicon microneedles2020Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The human skin functions as a strong barrier and when administering medical drugs through the skin a very high concentration of medicine is needed. With the use of microneedles the diffusivity can be increased. This project aims to manufacture microneedles with lasered holes in them, which could be used to increase the diffusivity and to lengthen the window of this increased diffusivity.

     

    Microneedles were wet etched from p-doped (100) silicon wafers in potassium hydroxide (KOH) using a square mask design. A laser cutter was used to create holes in the microneedles but it proved difficult to obtain sharp 90 degrees edges. The laser cutter was then used on plane silicon wafers with different protective thin films (molybdenum, silicon dioxide and a photoresist) to create holes with sharper edges. Lastly, the laser cutter was also used in combination with a deep etch on a plane silicon wafer coated with thin films of molybdenum and aluminium.

     

    Microneedles with a height of around 150 micrometers were able to be etched from a silicon wafer and the deep etch in combination with the laser cutter showed proof of concept in creating holes with sharp edges. Future work can be done to further increase the sharpness of the edges and to apply this method of creating holes directly on the microneedles.

  • Ismael, Sarah Omar
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology.
    Deep Learning and Image Processingfor Handwritten Style Recognition: Deep Learning and Image Processingfor Handwritten Style Recognition2020Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Medieval manuscripts provide insights into our history. Understanding and analyzing medieval scripts usually require experienced paleographers. Recognizing handwritten styles from medieval scripts provides better insights into understanding of medieval manuscripts. However, manually investigating the large number of scripts is a challenging and time-consuming task. Moreover, machine learning and image processing techniques have been applied to address many complex recognition and classification problems. Therefore, in this thesis, we implemented several image processing techniques and a deep learning model called DeepStyleDetector to classify seven handwritten styles in Latin medieval scripts. We used e-codices dataset to train and test our model. We programmatically curated 8,350 pages from 1,705 Latin manuscripts. To ensure reliability of our approach, we used an external dataset that was provided in CLaMM competition. It consisted of 5,540 images from twelve different styles inLatin manuscripts. To prepare the data, we applied color conversion, padding,downsampling, and patch extraction in order to reduce noise in the images. The ecodices data was randomly separated into three different sets: training set (70%),validation set (10%) and test set (20%). Applying DeepStyleDetector to the ecodices dataset, we got 88% accuracy on the training set, 84% on the validationset and 85.02 % on the test set by training the model just in 10 epochs. Additionally, when we tested our approach on the CLaMM dataset we got 79.28%accuracy on the test set which is more than the accuracy of 76% obtained by the winner in the CLaMM competition using deep learning. We conclude that using deep learning and image processing techniques are best way to classify styles in handwritten manuscripts.

  • Burell, Agnes
    et al.
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Business Studies.
    Thor, Josefine
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Business Studies.
    Hållbarhetsintegrering – från ord till handling: En studie om hur retailföretag integrerar hållbarhet med hjälp av formella och informella styrmedel2020Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Företag förväntas idag att arbeta med hållbarhet och hållbarhetsarbete är nödvändigt för företags långsiktiga överlevnad. Samtidigt som företag är medvetna om behovet av hållbarhetsarbete besitter de inte tillräcklig kunskap om hur hållbarhet ska integreras i sin verksamhet. Tidigare studier visar att formella och informella styrmedel är nyckelfaktorer för hållbarhetsintegrering, kunskapen om hur företag använder dessa styrmedel i sin hållbarhets- integrering är dock begränsad. Vidare har hållbarhet blivit allt viktigare för retailföretag. Denna studie undersöker därför detta genom en kvalitativ flerfallsstudie med sju semistrukturerade intervjuer, vars respondenter arbetar på stora svenska retailföretag. Studien visar hur frekvent olika styrmedel används samt visar en variation i vilken utsträckning och på vilket sätt dessa styrmedel används för hållbarhetsintegrering. Studien indikerar även att formella och informella styrmedel i samverkan leder till ökad hållbarhetsintegrering. Slutligen visar studien att formella och informella styrmedel hjälper företag i sin hållbarhetsintegrering och bidrar med ökad kunskap i denna komplexa fråga.

  • Svenson Hagström, Torkel
    Performance analysis of motor for electric aviation2020Independent thesis Advanced level (professional degree), 300 HE creditsStudent thesis
    Abstract [en]

    With a rising interest and improving technology regarding electric aviation, the Swedish ELISE-project aims to built a functional 21-seated electric aircraft by the year 2025. The aim of this thesis is to analyze the performance of a scalable model of an electric motor optimized for aircraft, in terms of magnetic leakage flux, generated back-EMF, torque constant and efficiency. Finite element simulations in 2D were performed to acquire theoretical values of the torque, losses and back-EMF, and these were then compared to experimental tests on the back-EMF of the motor and 3D-simulations of the leakage flux and iron losses of the motor. The comparisons were then used to adjust the remanent flux density of the permanent magnets in the2D model to make it coincide better with the actual motor. Experimental tests were also performed on the motor to estimate the actual non-resistive losses. Finally, the efficiency of the motor was mapped out for different rotational speeds and amounts of input power. The experimental study was limited due to technical constraints, but did verify some of the simulated values. The acquired efficiency at rated conditions was considered accurate and satisfactory, but the non-resistive losses and torque constant were still uncertain. Future tests of these parameters with better equipment were considered necessary, as well as simulations of the heating of the motor before running it at higher loads.

  • Public defence: 2020-04-23 13:00 H:son Holmdahlssalen, Uppsala
    Hernefalk, Björn
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Surgical Sciences, Orthopaedics.
    Surgical Treatment of Pelvic Ring Injuries and Acetabular Fractures: Aspects on Patient-reported Outcome2020Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    The overall aim of the present thesis was to study the patient perspective on outcome following surgical treatment of pelvic ring injuries and acetabular fractures. All studies were based on patients treated for such injuries at the Department of Orthopaedics, Uppsala University Hospital, Sweden.

    In Study I, a patient-reported outcome measure to provide condition-specific information regarding outcome after surgical treatment of pelvic ring injuries was developed. Seventy-three patients were asked to complete a questionnaire at three time points during follow-up. Evaluation of data resulted in the Pelvic Discomfort Index (PDI). This instrument is comprised of six questions regarding residual problems from the pelvic region with respect to pain, walking, hip motion, leg numbness, sexual life and the operation scar.

    The influence of the time-point post-surgery at which patients with surgically treated pelvic ring injuries or acetabular fractures estimate their pre-traumatic state was examined in study II. Seventy-three patients assessed their pre-traumatic status at three time-points post-surgery. It was found that pre-traumatic quality of life was high and comparable to a reference population. Pre-existing discomfort from the pelvic region was uncommon. A tendency for patients to estimate a better pre-traumatic status when assessments were delayed was observed.

    The objective of Study III was to compare outcome after surgical treatment of complex acetabular fractures in the elderly using either the combined hip procedure, consisting of open reduction and internal fixation (ORIF) in conjunction with an acute total hip arthroplasty, or ORIF alone with respect to mortality, need for secondary surgery and patient-reported outcome. Thirteen patients treated with the CHP were compared to 14 patients with similar fracture patterns treated with ORIF alone. The CHP conferred a markedly reduced need for secondary surgical procedures while no differences in perioperative mortality or patient-reported outcome could be demonstrated.

    Patient-reported outcome at five years following surgical treatment of pelvic ring injury was evaluated in study IV. The consequences of these injuries were found to be substantial and long-standing. Females reported a worse outcome than males, while influence of variables age, injury type and presence of associated injuries was limited.

    In Study V, patient experiences of life following treatment for pelvic ring injury was explored. Semi-structured interviews were conducted with ten patients at a median of 11 years after injury and analyzed using inductive content analysis. Patients described a heterogenous outcome, with residual impairment ranging from virtually none to severe disability. A need for adequate patient information and individual assessments of patients was noted.

    List of papers
    1. Development of a pelvic discomfort index to evaluate outcome following fixation for pelvic ring injury
    Open this publication in new window or tab >>Development of a pelvic discomfort index to evaluate outcome following fixation for pelvic ring injury
    2015 (English)In: Journal of Orthopaedic Surgery, ISSN 1022-5536, E-ISSN 2309-4990, Vol. 23, no 2, p. 146-149Article in journal (Refereed) Published
    Abstract [en]

    Purpose. To develop a pelvic discomfort index (PDI) to evaluate outcome following fixation for pelvic ring injury. Methods. 29 female and 44 male consecutive patients (mean age, 36 years) underwent internal fixation for pelvic ring injury of type B1 (n=10), B2 (n=22), B3 (n=15), C1 (n=18), C2 (n=5), and C3 (n=3), based on the AO/OTA classification. At postoperative 6, 12, and 24 months, patients were asked to assess their discomfort in the pelvis using a 14-item questionnaire. Three questions were open-ended, and responses were categorised by a single assessor. The remaining 11 questions were closed-ended and had 6 ordinal options from 'no discomfort' (score=0) to' extremely severe discomfort' (score=5). The content validity and relevance of the 11 closed-ended questions was determined. The 14-item questionnaire was compared with the 36-item Short Form Health Survey (SF-36). Results. Respectively at postoperative 6, 12, and 24 months, 78%, 71%, and 71% of the patients completed the 14-item questionnaire. Based on the factor analysis and responses to the open-ended questions, the number of items was reduced to 6 including pain, walking, mobility of the hips, loss of sensation in the legs, sexual life, and operation scar. Four factors could explain 96% of the total variance. The first factor involved the first 3 items (pain, walking, and hip motion) and addressed 'pelvis', whereas 3 factors involved the remaining items and each addressed peripheral neurology, sexual life, and operation scar. A PDI was developed using these 6 items. The PDI had high internal reliability (alpha=0.89), adequate content and criterion validity, and moderate correlation with the SF-36 total score or scores of physical function, bodily pain, and general health (r=0.50-0.77). Conclusion. The PDI provides valid, specific, and relevant information to assess

    Keywords
    fracture fixation, internal, patient outcome assessment, pelvis, quality of life
    National Category
    Orthopaedics
    Identifiers
    urn:nbn:se:uu:diva-263545 (URN)000360670300005 ()26321538 (PubMedID)
    Available from: 2015-10-02 Created: 2015-10-02 Last updated: 2020-02-24Bibliographically approved
    2. Estimating pre-traumatic quality of life in patients with surgically treated acetabular fractures and pelvic ring injuries: Does timing matter?
    Open this publication in new window or tab >>Estimating pre-traumatic quality of life in patients with surgically treated acetabular fractures and pelvic ring injuries: Does timing matter?
    2016 (English)In: Injury, ISSN 0020-1383, E-ISSN 1879-0267, Vol. 47, no 2, p. 389-394Article in journal (Refereed) Published
    Abstract [en]

    BACKGROUND AND PURPOSE: Evaluation of patient-assessed functional outcome in traumatic conditions has specific challenges. To obtain pre-traumatic data to allow for comparison during follow-up, retrospective assessments are needed. How such data is affected by posttraumatic time-point chosen for evaluation is unknown. The primary purpose of this study was to investigate how the time-point chosen for retrospective assessment of pre-traumatic quality of life (QoL) in patients with surgically treated acetabular fractures and pelvic ring injuries influenced the results. A secondary purpose was to examine the pre-traumatic QoL-profile in patients with these injuries.

    PATIENTS AND METHODS: 73 patients were included, where 50 had an acetabular fracture and 23 a pelvic ring injury. Pre-traumatic QoL was evaluated using the generic instruments SF-36 and EQ5D in conjunction with the condition-specific Pelvic Trauma Questionnaire (PTQ). Questionnaires were completed at three time points: 0, 1 and 2 months post-surgery.

    RESULTS: Number of responders were 73 patients at 0 months, 61 patients at 1 month and 53 patients at 2 months. 50 patients answered the questionnaires at all three time-points. A trend was observed with all instruments where patients estimated a better pre-traumatic status with narrower distributions when assessment was delayed. At 2 months, scores for 4 out of 8 SF-36 domains where significantly higher compared to 0 months. For EQ5D, EQ VAS improved at 1 and 2 months compared to month 0 results but no other significant differences between time-points were found. Results from the PTQ demonstrated no significant differences over time. Pre-traumatic quality of life was high and for SF-36 comparable to a population norm. A very low level of pre-existing discomfort from the pelvic region was reported through the PTQ.

    CONCLUSION: Patients with surgically treated acetabular fractures and pelvic ring injuries estimate a higher pre-traumatic functional status when assessment is carried out at 1 or 2 months post-surgery compared to perioperative measurements. The SF-36 seems to be more sensitive than the EQ5D in this respect. Pre-traumatic QoL in patients with surgically treated acetabular fractures and pelvic ring injuries is generally high and pre-existing discomfort from the pelvic region is uncommon.

    National Category
    Medical and Health Sciences Orthopaedics Surgery
    Identifiers
    urn:nbn:se:uu:diva-266605 (URN)10.1016/j.injury.2015.09.006 (DOI)000370283300016 ()26434576 (PubMedID)
    External cooperation:
    Available from: 2015-11-10 Created: 2015-11-10 Last updated: 2020-02-24Bibliographically approved
    3. Acute total hip arthroplasty combined with internal fixation for displaced acetabular fractures in the elderly: A short-term comparison with internal fixation alone after a minimum of two years
    Open this publication in new window or tab >>Acute total hip arthroplasty combined with internal fixation for displaced acetabular fractures in the elderly: A short-term comparison with internal fixation alone after a minimum of two years
    2019 (English)In: The Bone & Joint Journal, ISSN 2049-4394, E-ISSN 2049-4408, Vol. 101B, no 4, p. 478-483Article in journal (Refereed) Published
    Abstract [en]

    Aims

    Displaced, comminuted acetabular fractures in the elderly are increasingly common, but there is no consensus on whether they should be treated non-surgically, surgically with open reduction and internal fixation (ORIF), or with acute total hip arthroplasty (THA). A combination of ORIF and acute THA, an approach called 'combined hip procedure' (CHP), has been advocated and our aim was to compare the outcome after CHP or ORIF alone.

    Patients and Methods

    A total of 27 patients with similar acetabular fractures (severe acetabular impaction with or without concomitant femoral head injury) with a mean age of 72.2 years (50 to 89) were prospectively followed for a minimum of two years. In all, 14 were treated with ORIF alone and 13 were treated with a CHP. Hip joint and patient survival were estimated. Operating times, blood loss, radiological outcomes, and patient-reported outcomes were assessed.

    Results

    No patient in the CHP group required further hip surgery, giving THA a survival rate of 100% (95% confidence interval (CI) 100 to 100) after three years, compared with 28.6% hip joint survival in the ORIF group (95% CI 12.5 to 65.4; p = 0.001). No dislocations or deep infections occurred in the CHP group. No patient died within the first year after index surgery, but patient survival was lower in the CHP group after three years. There were no relevant differences in patient-reported outcomes.

    Conclusion

    The CHP confers a considerably reduced need of further surgery when compared with ORIF alone in elderly patients with complex acetabular fractures. These findings encourage both further use of, and larger prospective studies on, the CHP.

    National Category
    Orthopaedics
    Identifiers
    urn:nbn:se:uu:diva-382251 (URN)10.1302/0301-620X.101B4.BJJ-2018-1027.R2 (DOI)000462754300019 ()30929478 (PubMedID)
    Available from: 2019-05-03 Created: 2019-05-03 Last updated: 2020-02-24Bibliographically approved
    4. Patient-reported Outcome in Surgically Treated Pelvic Ring Injuries at 5 Years Post-surgery.
    Open this publication in new window or tab >>Patient-reported Outcome in Surgically Treated Pelvic Ring Injuries at 5 Years Post-surgery.
    2019 (English)In: Scandinavian Journal of Surgery, ISSN 1457-4969, E-ISSN 1799-7267, article id 1457496919877583Article in journal (Refereed) Epub ahead of print
    Abstract [en]

    BACKGROUND AND AIMS: Long-term prospective data on patient-reported outcome after surgical treatment of pelvic ring injuries are scarce. This study aimed at describing results at 5 years post-surgery using validated outcome measures.

    PATIENTS AND METHODS: Patients admitted for surgical treatment of pelvic ring injuries were prospectively included and asked to report their outcome at 1, 2 and 5 years post-surgery using two patient-reported outcome measures: the generic Short-Form 36 and the condition-specific pelvic discomfort index. Data were evaluated using mixed-effects linear models.

    RESULTS: There were 108 patients (68 males and 40 females), mean age 38 years. Injury type according to the AO/OTA-classification was B-type in 68 patients and C-type in 40 patients. No domain of the Short-Form 36 reached norm values at 5 years post-surgery. Females reported a worse outcome than males concerning general health (p < 0.01) at 5 years. Recovery of physical function (p < 0.01), mental health (p = 0.04), and pain (p = 0.01) was observed for males at 5 years compared to earlier assessments, while females on the contrary described more pain at this time-point (p = 0.03). Mean pelvic discomfort index at 5 years was 27, indicating moderate residual pelvic discomfort overall. Males reported less pelvic discomfort than females at 5 years (p = 0.02) and improved when compared to results at 2 years (p = 0.02), while females did not. Influence of age, fracture type, and presence of associated injuries on patient-reported outcome was limited.

    CONCLUSION: Surgically treated pelvic ring injuries are associated with long-standing negative effects on patient-reported outcome. Males report a better outcome than females at 5 years post-surgery.

    Keywords
    Pelvic ring injuries, Short-Form 36, orthopedic surgery, patient-reported outcome, patient-reported outcome measures, pelvic discomfort index, trauma
    National Category
    Orthopaedics
    Identifiers
    urn:nbn:se:uu:diva-403813 (URN)10.1177/1457496919877583 (DOI)31537176 (PubMedID)
    Available from: 2020-02-04 Created: 2020-02-04 Last updated: 2020-02-24Bibliographically approved
    5. The Long and Winding Road: Patient Experiences Following Surgical Treatment of Pelvic Ring Injuries
    Open this publication in new window or tab >>The Long and Winding Road: Patient Experiences Following Surgical Treatment of Pelvic Ring Injuries
    (English)In: Article in journal (Refereed) Submitted
    National Category
    Orthopaedics
    Identifiers
    urn:nbn:se:uu:diva-404263 (URN)
    Available from: 2020-02-16 Created: 2020-02-16 Last updated: 2020-02-24Bibliographically approved
  • Bredberg, William
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    En utveckling av alternativa metoder för klassificering av avrinningsområden med avseende på bebyggelsetyp och anslutningsförhållanden2020Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Surfaces of varying permeability and different combinations of water pipelines within catchment areas result in different runoff coefficients. Classification of catchment areas with regards to building type and water pipeline connections are therefore commonly used in order to simplify runoff calculations. The work required to perform these classifications is often time consuming as it is performed manually. This master's thesis aims to make the task of classification less labour intensive.

    Three alternative methods for classification with regards to building type and one method for water pipeline connection were considered in this master's thesis. The first two building type classification methods were based on parallellepiped and maximum likelihood classification theory and required a choice of parameters and training data in order to perform classifications. The third method was based on a nearest neighbour algorithm and only required training data in the form of a number of previously classified areas. All three building type classification methods were evaluated against previously obtained classifications for catchment areas using confusion matrices. The method purposed for catchment area water pipeline connections was developed from a given number of predetermined conditions. That method did not have the same evaluation opportunities as no previously made classifications could be obtained. Instead, the method was validated by inspection of individual example areas.

    The method based on the nearest neighbour algorithm proved to perform very well, with a strength of agreement that was almost perfect under certain conditions. The performance of the method was however limited by city formation and area distribution. Hence, future usage of the method require an understanding of how the algorithm performs the classifications and under what circumstances the method may or may not produce sufficient results. All other methods purposed for building type classification produced inferior results with the parameters that were tested. The water pipeline connection classification method followed the outlined conditions and seemed to perform well. It is however subject to data limitations and the method would have to be validated in additional cities on several data sets in order to provide a better basis for evaluation.