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  • 151.
    Curic, Vladimir
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion.
    Luengo Hendriks, Cris L.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion.
    Borgefors, Gunilla
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion.
    Salience adaptive structuring elements2012Inngår i: IEEE Journal on Selected Topics in Signal Processing, ISSN 1932-4553, E-ISSN 1941-0484, Vol. 6, nr 7, s. 809-819Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Spatially adaptive structuring elements adjust their shape to the local structures in the image, and are often defined by a ball in a geodesic distance or gray-weighted distance metric space. This paper introduces salience adaptive structuring elements as spatially variant structuring elements that modify not only their shape, but also their size according to the salience of the edges in the image. Morphological operators with salience adaptive structuring elements shift edges with high salience to a less extent than those with low salience. Salience adaptive structuring elements are less flexible than morphological amoebas and their shape is less affected by noise in the image. Consequently, morphological operators using salience adaptive structuring elements have better properties.

  • 152.
    Dage, Sandra
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion.
    Att hitta användbarhetsproblem med Google Analytics - är det möjligt?2016Independent thesis Advanced level (professional degree), 20 poäng / 30 hpOppgave
    Abstract [en]

    The scope of research is usability problems and web analytics. This thesis examines

    whether or nor Google Analytics can point out the usability problems a website has,

    and describes the process of usability analysis of the two websites belonging to the

    organisation ArtDatabanken. The research is divided into two parts. The first part

    describes the collection of the usability problems ArtDatabanken had and what

    usability problems that were identified. The second part describes the

    Google Analytics analysis of the usability problems that were possible to investigate,

    how the study was designed and the result from that investigation. Finally, some

    recommendations are given on how Google Analytics should be improved to more

    effectively find potential usability problems. The results of the research show that

    Google Analytics can find some of the identified usability problems, but the automatic

    implementation and its standard reports is not effective enough. By tracking all of the

    events at the site, a better understanding of what users are doing during their visits

    could be obtained. This together with some changes of the built-in reports would

    increase the possibilities to find potential usability problems by using Google

    Analytics.

  • 153.
    Davidian, Shant
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion.
    Designing with autonomy analysis - the possibilities and risks with using autonomy analysis when making computer design2012Independent thesis Advanced level (professional degree), 20 poäng / 30 hpOppgave
    Abstract [en]

    Today we have a great technological development in many fields and this have made an impact on computer systems and their design. For my thesis I am interested to see a concrete example of how anorganization prepares and developtheir computer system. I will evaluate the requirement specification for the Svenska Kärnbränslehantering AB to see how it was created. I analyzed the process of creating new requirements for the new computer system GADD with autonomous analysis, the analysis is made by the tool EthXpert. The conclusion I can make from this thesis is autonomous analysis gave us a good understanding of how a computer system should be like, how decisions are made for designing them. Even do we analyze a part of a whole network of stakeholders we received useful answers. I think autonomous analysis works for design decisions as long we can verify our answers we received. Our analysis is built on the knowledge from among other things the requirement specification andthe requirement specification is based and made of interviews from the stakeholders. Regarding the major difference I discovered between Design rationaleand autonomy analysis is where and when the argument for a design is presented and discovered. With Design rationalethe argument is already presented while in autonomy analysis the argument will be found in the analysis and therefore new solution is possible to be found. 

  • 154. Deepak, Rajasekharan Usha
    et al.
    Kumar, Ramakrishnan Rajesh
    Byju, Neendoorthalackal Balakrishnan
    Sharathkumar, Pundluvalu Nataraju
    Pournami, Chandran
    Sibi, Salam
    Bengtsson, Ewert
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion.
    Sujathan, Kunjuraman
    Computer Assisted Pap Smear Analyser for Cervical Cancer Screening using Quantitative Microscopy2015Inngår i: Journal of Cytology & Histology, ISSN 2157-7099, Vol. 6, nr S3, artikkel-id 010Artikkel i tidsskrift (Fagfellevurdert)
  • 155.
    Delic, Marija
    et al.
    University of Novi Sad, Faculty of technical sciences.
    Lindblad, Joakim
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion. Mathematical Institute, Serbian Academy of Sciences and Arts, Belgrade, Serbia.
    Sladoje, Natasa
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Mathematical Institute, Serbian Academy of Sciences and Arts, Belgrade, Serbia.
    αLBP – a novel member of the Local Binary Pattern family based on α-cutting2015Inngår i: Proc. 9th International Symposium on Image and Signal Processing and Analysis, IEEE , 2015, s. 13-18Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Local binary pattern (LBP) descriptors have been popular in texture classification in recent years. They were introduced as descriptors of local image texture and their histograms are shown to be well performing texture features. In this paper we introduce two new LBP descriptors, αLBP and its improved variant IαLBP. We evaluate their performance in classification by comparing them with some of the existing LBP descriptors - LBP, ILBP, shift LBP (SLBP) and with one ternary descriptor - LTP. The texture descriptors are evaluated on three datasets - KTH-TIPS2b, UIUC and Virus texture dataset. The novel descriptor outperforms the other descriptors on two datasets, KTH-TIPS2b and Virus, and is tied for first place with ILBP on the UIUC dataset.

  • 156. den Hollander, Lianne
    et al.
    Han, HongMei
    de Winter, Matthijs
    Svensson, Lennart
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion.
    Masich, Sergej
    Daneholt, Bertil
    Norlén, Lars
    Skin lamellar bodies are not discrete vesicles but part of a tubuloreticular network2016Inngår i: Acta Dermato-Venereologica, ISSN 0001-5555, E-ISSN 1651-2057, Vol. 96, nr 3, s. 303-309Artikkel i tidsskrift (Fagfellevurdert)
  • 157.
    Deneke, Julia
    et al.
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Samhällsvetenskapliga fakulteten, Institutionen för informatik och media.
    Lehane, Darren
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Samhällsvetenskapliga fakulteten, Institutionen för informatik och media.
    Kandler, Alexandra
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Samhällsvetenskapliga fakulteten, Institutionen för informatik och media.
    Menchini, Tom
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Samhällsvetenskapliga fakulteten, Institutionen för informatik och media.
    Laaksoharju, Mikael
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion.
    Obaid, Mohammad
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion.
    Using rapid prototyping to explore design implications for a pill-dispensing social agent2017Inngår i: Proc. 5th International Conference on Human Agent Interaction, New York: ACM Press, 2017, s. 53-59Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The process of managing one's daily intake of medication has been shown to be error-prone for a variety of reasons. In this paper, we explore, through a rapid prototyping approach, the design implications for a social robotic agent intended for dispensing medicine. The process started with initial interviews with medical experts to allow for a better understanding of the design space. Their input helped us realise a low-fidelity, animal-like, robotic prototype for pill-dispensing. We report initial impressions of the prototype from four pharmacists. Based on those findings, we present design implications categorised into: look and feel, social role, desired task, and the agent's presence in a home environment.

  • 158.
    Deshmukh, Amol
    et al.
    Heriot Watt Univ, Sch Math & Comp Sci, Edinburgh EH14 4AS, Midlothian, Scotland.
    Janarthanam, Srinivasan
    Heriot Watt Univ, Sch Math & Comp Sci, Edinburgh EH14 4AS, Midlothian, Scotland.
    Hastie, Helen
    Heriot Watt Univ, Sch Math & Comp Sci, Edinburgh EH14 4AS, Midlothian, Scotland.
    Lim, Mei Yii
    Heriot Watt Univ, Sch Math & Comp Sci, Edinburgh EH14 4AS, Midlothian, Scotland.
    Aylett, Ruth
    Heriot Watt Univ, Sch Math & Comp Sci, Edinburgh EH14 4AS, Midlothian, Scotland.
    Castellano, Ginevra
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion.
    How expressiveness of a robotic tutor is perceived by children in a learning environment2016Inngår i: Proc. 11th ACM/IEEE International Conference on Human Robot Interaction, Piscataway, NJ: IEEE Press, 2016, s. 423-424Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We present a study investigating the expressiveness of two different types of robots in a tutoring task. The robots used were i) the EMYS robot, with facial expression capabilities, and ii) the NAO robot, without facial expressions but able to perform expressive gestures. Preliminary results show that the NAO robot was perceived to be more friendly, pleasant and empathic than the EMYS robot as a tutor in a learning environment.

  • 159.
    Dhara, Ashis Kumar
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion.
    Arids, Erik
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för kirurgiska vetenskaper, Radiologi.
    Fahlström, Markus
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för kirurgiska vetenskaper, Radiologi.
    Wikström, Johan
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för kirurgiska vetenskaper, Radiologi.
    Larsson, Elna-Marie
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för kirurgiska vetenskaper, Radiologi.
    Strand, Robin
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion.
    Interactive segmentation of glioblastoma for post-surgical treatment follow-up2018Inngår i: Proc. 24th International Conference on Pattern Recognition, IEEE, 2018, s. 1199-1204Konferansepaper (Fagfellevurdert)
  • 160.
    Dong, Pei
    et al.
    CREATIS, Université de Lyon and ESRF.
    Pacureanu, Alexandra
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion.
    Zuluaga, Maria
    University College London .
    Olivier, Cecile
    European Synchrotron Radiation Facility and CREATIS, Université de Lyon .
    Frouin, Frederique
    Faculté de Médecine Pierre et Marie Curie - Pitié Salpétrière.
    Grimal, Quentin
    Université Pierre et Marie Curie.
    Peyrin, Francoise
    European Synchrotron Radiation Facility, Creatis, Université de Lyon .
    A new quantitative approach for estimating bone cell connections from nano-CT images2013Inngår i: Engineering in Medicine and Biology Society (EMBC), 2013 35th Annual International Conference of the IEEE, IEEE , 2013, s. 3694-3697Konferansepaper (Fagfellevurdert)
  • 161. Drazic, Slobodan
    et al.
    Sladoje, Natasa
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion.
    Lindblad, Joakim
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion.
    Estimation of Feret's diameter from pixel coverage representation of a shape2016Inngår i: Pattern Recognition Letters, ISSN 0167-8655, E-ISSN 1872-7344, Vol. 80, s. 37-45Artikkel i tidsskrift (Fagfellevurdert)
  • 162.
    Edfeldt, Gabriella
    et al.
    Karolinska Inst, Stockholm, Sweden.
    Lajoie, Julie
    Univ Manitoba, Winnipeg, MB, Canada.
    Röhl, Maria
    Karolinska Inst, Stockholm, Sweden.
    Omollo, Kenneth
    Univ Nairobi, Nairobi, Kenya.
    Wählby, Carolina
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion.
    Boily-Larouche, Genevieve
    Univ Manitoba, Winnipeg, MB, Canada.
    Kimani, Joshua
    Univ Nairobi, Nairobi, Kenya.
    Fowke, Keith
    Univ Manitoba, Winnipeg, MB, Canada; Univ Nairobi, Nairobi, Kenya.
    Broliden, Kristina
    Karolinska Inst, Stockholm, Sweden.
    Tjernlund, Annelie
    Karolinska Inst, Stockholm, Sweden.
    The Effect of DMPA Use on the Human Cervical Epithelium: Mechanisms Revealed by Image Analysis2018Inngår i: AIDS Research and Human Retroviruses, ISSN 0889-2229, E-ISSN 1931-8405, Vol. 34, nr S1, s. 310-310Artikkel i tidsskrift (Annet vitenskapelig)
  • 163. Edfeldt, Gabriella
    et al.
    Lajoie, Julie
    Röhl, Maria
    Tjernlund, Annelie
    Wählby, Carolina
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion.
    Omollo, Kenneth Odiwuor
    Boily-Larouche, Genevieve
    Cheruiyot, Julianna
    Kimani, Makubo
    Kimani, Joshua
    Oyugi, Julius
    Fowke, Keith R.
    Broliden, Kristina
    Hormonal contraceptive use affects HIV susceptibility: mechanisms revealed by image analysis2017Inngår i: Scandinavian Journal of Immunology, ISSN 0300-9475, E-ISSN 1365-3083, Vol. 86, nr 4, s. 281-281Artikkel i tidsskrift (Annet vitenskapelig)
  • 164. Eimon, Peter M
    et al.
    Ghannad-Rezaie, Mostafa
    De Rienzo, Gianluca
    Allalou, Amin
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion.
    Wu, Yuelong
    Gao, Mu
    Roy, Ambrish
    Skolnick, Jeffrey
    Yanik, Mehmet Fatih
    Brain activity patterns in high-throughput electrophysiology screen predict both drug efficacies and side effects.2018Inngår i: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Nature Communications, ISSN 2041-1723, EISSN 2041-1723, ISSN 2041-1723, Vol. 9, nr 1, artikkel-id 219Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Neurological drugs are often associated with serious side effects, yet drug screens typically focus only on efficacy. We demonstrate a novel paradigm utilizing high-throughput in vivo electrophysiology and brain activity patterns (BAPs). A platform with high sensitivity records local field potentials (LFPs) simultaneously from many zebrafish larvae over extended periods. We show that BAPs from larvae experiencing epileptic seizures or drug-induced side effects have substantially reduced complexity (entropy), similar to reduced LFP complexity observed in Parkinson's disease. To determine whether drugs that enhance BAP complexity produces positive outcomes, we used light pulses to trigger seizures in a model of Dravet syndrome, an intractable genetic epilepsy. The highest-ranked compounds identified by BAP analysis exhibit far greater anti-seizure efficacy and fewer side effects during subsequent in-depth behavioral assessment. This high correlation with behavioral outcomes illustrates the power of brain activity pattern-based screens and identifies novel therapeutic candidates with minimal side effects.

  • 165.
    Ekstedt, Erik
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion.
    A Deep Reinforcement Learning Framework where Agents Learn a Basic form of Social Movement2018Independent thesis Advanced level (professional degree), 20 poäng / 30 hpOppgave
    Abstract [en]

    For social robots to move and behave appropriately in dynamic and complex social contexts they need to be flexible in their movement behaviors. The natural complexity of social interaction makes this a difficult property to encode programmatically. Instead of programming these algorithms by hand it could be preferable to have the system learn these behaviors. In this project a framework is created in which an agent, through deep reinforcement learning, can learn how to mimic poses, here defined as the most basic case of social movements. The framework aimed to be as agent agnostic as possible and suitable for both real life robots and virtual agents through an approach called "dancer in the mirror". The framework utilized a learning algorithm called PPO and trained agents, as a proof of concept, on both a virtual environment for the humanoid robot Pepper and for virtual agents in a physics simulation environment. The framework was meant to be a simple starting point that could be extended to incorporate more and more complex tasks. This project shows that this framework was functional for agents to learn to mimic poses on a simplified environment.

  • 166. Ekstig, Kerstin
    et al.
    Kaijser, Sten
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Matematiska institutionen.
    Kiselman, Christer O.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion.
    Lindahl, Lars-Åke
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Matematiska institutionen.
    Vretblad, Anders
    Sonja Lyttkens: Minnesord2015Inngår i: Upsala Nya Tidning, Vol. 125, nr 12, s. B13-B13Artikkel i tidsskrift (Annet (populærvitenskap, debatt, mm))
    Abstract [en]

    Sonja Lyttkens was born in 1919 and died in 2014. She was the second woman to get a PhD in mathematics in Sweden, and the first to become a university lecturer.

  • 167.
    Ekström, Johan
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion.
    Stadler, Sofia
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion.
    Visualisering av elanvändning i kontorsfastigheter: Utveckling, implementering och utvärdering av visualiseringsverktyg för minskad elanvändning2015Independent thesis Advanced level (professional degree), 20 poäng / 30 hpOppgave
    Abstract [en]

    This thesis examines the effects of electricity visualization in an office building. The subject was investigated through the creation of a web based visualization tool that was made accessible to the about 1500 employees in a large office building. The visualization was available for three weeks. During this period interviews, user studies and observations took place in order to evaluate what, if any, effects the visualization had on the attitudes and behaviors in the office. Electricity use data was collected and analyzed to see if the project had a statistically significant effect on the electricity consumption in the office.

    The results from the interviews and the data analysis indicate that no reduction in electricity consumption took place, and a number of factors that could increase the chances of success were identified. The workstations covered by an electricity meter should correspond to smaller organizational units in order to take advantage of existing group affiliations. Further, communication channels should be effective, so that as many workers as possible could be reached and become interested in the project. Finally, the goals of the project should be aligned with the goals of the workers to encourage behavioral change instead of making energy saving a burden that takes time from ordinary tasks. A slight change in attitude was detected, but this did not result in any change of behavior. One reason for the absence of change in behaviors was the feeling of lack of control over energy use.

  • 168.
    Elfving, Markus
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion.
    Althin, Tom
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion.
    Prediktiv analys i människans tjänst2019Independent thesis Advanced level (professional degree), 20 poäng / 30 hpOppgave
    Abstract [en]

    Predictive Analysis is a process for extracting information from large amounts of data and using it to make qualified predictions about future results. While previously the lack of available data has been a challenge within the field, big questions today are instead how to use the results, and the way in which these are presented in order for the user to be able to take advantage of the information.

    The purpose of this thesis has been to create hypotheses for how predictive analysis can be used in practical decision-making contexts, whereby the decision- maker is under time pressure, especially with regard to how the result can be visualized. This has been done through a case study at the Uppsala Ambulance Monitoring Center. The method used for the study is called Contextual Design, which has helped create an understanding of the users and the system they work in. Using this understanding, a prototype has been created, which has been tested on the users to see how well they have been able to interpret the information that has been visualized.

    Predictive analysis has proved to be helpful primarily in less urgent cases and to help the decision maker to differentiate matters similar to each other. For visualization of the predictive results, it has been found that these is better shown as a comparison between the user's decision hypothesis and historical decision results rather than only as an absolute value. Furthermore, it has been found that a high degree of transparency in the information on which the results are based is preferable, but that it is important that clear explanations are given for the results shown.

  • 169.
    Elkan, Oscar
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion.
    Implementing a Contract Management Tool for Users of an e-Sourcing Platform2015Independent thesis Advanced level (professional degree), 20 poäng / 30 hpOppgave
    Abstract [en]

    This thesis project was carried out at the IT-company Trade Extensions in Uppsala, Sweden. Trade Extensions mainly work with providing advanced e-sourcing solutions to their customer organizations, which basically means professionally organizing different types of complex tender projects. These services are mainly provided through the company’s web platform TESS (Trade Extensions Sourcing Service). This project is a case study that was done with the purpose of examining the conditions for the company to implement a tool for contract management to their customers. The study was made with two main aspects in focus: Technical conditions and usability. The method used for this project consisted of several steps. First, a theoretical mapping and interpretation of the concept “Contract Lifecycle Management” (CLM) was made. After that, a number of interviews were prepared and conducted with representatives from four customer organizations of Trade Extensions in order to find out what potential end users of a contract management tool would expect in terms of functionality and usability. Business perspectives, such as organizational and juridical aspects, were also considered in order to interpret how they could affect or be affected by an implementation of such a tool. Based on the gathered data from the interviewees, a conceptual proposal on how a contract management tool could be a part of Trade Extensions’ existing services was made, based on both pure mockups, implementations made with existing functionalities at the company's platform and some programming in order to implement new functionality. This conceptual proposal was presented to the interviewees for a final feedback, after which an analysis was made. The conclusion was that a majority of the functionality needed for a proper contract management tool implementation is already existing at the company’s platform. The main challenges for Trade Extensions will be to introduce a constraint-based design that suits a contract management workflow, as well as the implementation of a reliable and robust tool for e-signatures.

  • 170.
    Ellegren, Lovisa
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion.
    Grönvall, Stina
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion.
    Effektivt införande av ny teknik i en organisation: En studie om trafikledningen i införandeprocessen av ERTMS i Sverige2016Independent thesis Advanced level (professional degree), 20 poäng / 30 hpOppgave
    Abstract [en]

    The new railway signaling system ERTMS, European Rail Traffic Management System, will be introduced in all the railway tracks in Sweden, due to the Swedish railway legislation. The implementation of ERTMS in Sweden is performed by Trafikverket and two pilot projects have been done. Now the experiences from the traffic managements for these pilot tracks must be preserved.

    The purpose of this master thesis was to identify key aspects to facilitate the implementation of ERTMS for the traffic management in Sweden. The main task was to collect the experiences from the introduction of ERTMS on the pilot tracks from the traffic management in Ånge and Boden. The problems that occurred before, during and after the implementation process of ERTMS on the pilot tracks have been identified and further recommendations have been developed for how these problems can be avoided and managed in the upcoming implementation of the remaining tracks in Sweden.

    The main contribution of the thesis is recommendations to Trafikverket on how to facilitate the ERTMS implementation process for the traffic management. The key recommendations are:

    • That the technology works and that the traffic management has the opportunity to influence the development of new versions of the system.

    • That the traffic management should be informed about the project and involved in the implementation process.

    • That the education and practice for the traffic management in ERTMS will satisfy their need in terms of adapted material and that they have access to an ERTMS simulator.

    If Trafikverket takes into consideration the problems that have occurred and work out solutions for how to manage and avoid them in the upcoming implementation of ERTMS in Sweden, the outcome should be successful.

  • 171. Enge, Martin
    et al.
    Arda, H. Efsun
    Mignardi, Marco
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion. Uppsala universitet, Science for Life Laboratory, SciLifeLab. Stanford Univ, Dept Bioengn & Appl Phys, Stanford, CA 94305 USA.
    Beausang, John
    Bottino, Rita
    Kim, Seung K.
    Quake, Stephen R.
    Single-cell analysis of human pancreas reveals transcriptional signatures of aging and somatic mutation patterns2017Inngår i: Cell, ISSN 0092-8674, E-ISSN 1097-4172, Vol. 171, nr 2, s. 321-330.e14Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    As organisms age, cells accumulate genetic and epigenetic errors that eventually lead to impaired organ function or catastrophic transformation such as cancer. Because aging reflects a stochastic process of increasing disorder, cells in an organ will be individually affected in different ways, thus rendering bulk analyses of postmitotic adult cells difficult to interpret. Here, we directly measure the effects of aging in human tissue by performing single-cell transcriptome analysis of 2,544 human pancreas cells from eight donors spanning six decades of life. We find that islet endocrine cells from older donors display increased levels of transcriptional noise and potential fate drift. By determining the mutational history of individual cells, we uncover a novel mutational signature in healthy aging endocrine cells. Our results demonstrate the feasibility of using single-cell RNA sequencing (RNA-seq) data from primary cells to derive insights into genetic and transcriptional processes that operate on aging human tissue.

  • 172.
    Engman, Clara
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion.
    Skärdin, Linnea
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion.
    Ramverk för att motverka algoritmisk snedvridning2019Independent thesis Advanced level (professional degree), 20 poäng / 30 hpOppgave
    Abstract [sv]

    Användningen av artificiell intelligens (AI) har tredubblats på ett år och och anses av vissa vara det viktigaste paradigmskiftet i teknikhistorien. Den rådande AI-kapplöpningen riskerar att underminera frågor om etik och hållbarhet, vilket kan ge förödande konsekvenser. Artificiell intelligens har i flera fall visat sig avbilda, och till och med förstärka, befintliga snedvridningar i samhället i form av fördomar och värderingar. Detta fenomen kallas algoritmisk snedvridning (algorithmic bias). Denna studie syftar till att formulera ett ramverk för att minimera risken att algoritmisk snedvridning uppstår i AI-projekt och att anpassa det efter ett medelstort konsultbolag. Studiens första del är en litteraturstudie på snedvridningar - både ur ett kognitivt och ur ett algoritmiskt perspektiv. Den andra delen är en undersökning av existerande rekommendationer från EU, AI Sustainability Center, Google och Facebook. Den tredje och sista delen består av ett empiriskt bidrag i form av en kvalitativ intervjustudie, som har använts för att justera ett initialt ramverk i en iterativ process.

  • 173.
    Ericson, Andreas
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion.
    Olson, Molle
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion.
    När resenären själv får välja: Lösning för ökat kollektivtrafikresande inom Uppsala län2019Independent thesis Advanced level (professional degree), 20 poäng / 30 hpOppgave
    Abstract [en]

    This thesis investigates the public transport system in the city of Uppsala in Sweden. This thesis bases itself on the fact that the development of a new ticketing and payment system is about to start. The purpose of the thesis is to help increase the number of journeys travelled with public transport. To achieve this, the goal of the thesis is to present a vision for UL’s new payment and ticketing system with concepts of interaction design in mind whilst investigating whether a simplified system might increase travel with public transport.

    The thesis uses surveys, interviews and usability testing of the present-day system. The opinions can be summarised such that people in general find difficulties in grasping the different fare zones of the public transport system and do therefore experience difficulties in buying the correct ticket for their specific journey. 

    The new ticketing system should consist of a redesigned fare structure, where a complete removal of the fare zones would create perhaps the most intuitive ticketing system. The new ticketing system should also be able to handle contactless payments, easing the burden on bus drivers who will not need to issue tickets to passengers. In general, a downscaling of the current ticketing system is preferable to avoid confusing travellers. It is of the essence to consider the ticketing and payment system as a sociotechnical system since investigating neither technology nor people alone will lead to a successfully implemented system. They need to be investigated jointly.

  • 174.
    Erlandsson, Mikael
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion.
    What's in your mind?: Collegial Verbalisation – An ecological approach to knowledge elicitation2014Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    Knowledge elicitation of the work of professional operators, using traditional methods such as concurrent or retrospective verbalization is problematic. Concurrent verbalization distracts the operators from their primary task, and the operators have difficulties in verbalizing about their automated work tasks. Retrospective verbalization on the other hand, suffers from rationalization problems. An operator might give a perfectly good explanation of some action taken and might also be completely confident about truth of the verbalized information, when it in fact is incorrect. To overcome some of these problems, this thesis presents a new complementary verbalization method called Collegial Verbalization (CV).

    The CV-method utilizes the shared knowledge among work colleagues to improve the quality of the resulting information. The method consists roughly of the following steps; (1) Video tape subjects while they are working. (2) Play back interesting events to the subject’s colleagues individually and let them verbalize on the subject’s actions. (3) Compare the colleagues’ verbal reports to each other to find similarities, differences, etc. Throughout my research I have formulated, defined and assessed the new method in detail. The method has been applied to study train drivers, high-speed ferry operators, train traffic dispatchers and the medical staff at intensive care units.

    Comparative studies have shown; (1) that CV-protocols can be used as an independent source of data, (2) that colleagues produce reports with similar characteristics of retrospective verbal reports, (3) that the CV-method can produce more information than retrospective verbalization, because of the advantage of using multiple narrators. When the intention is to gather data as input to design, rather than establishing the original thought processes form the time of the studied events, the CV-method can also produce more reliable information than retrospective verbalization, because of the advantage of using multiple narrators.

    Based on these results, I have concluded that the CV-method has a clear advantage as a complementary information acquisition method, when studying the work of professional operators. The thesis ends with a discussion about several additional possible applications for the CV-method, such as applied team learning or psychological research in the field of decision making.

    Delarbeid
    1. Augmented reality as a navigation aid for the manoeuvring of High-Speed Crafts
    Åpne denne publikasjonen i ny fane eller vindu >>Augmented reality as a navigation aid for the manoeuvring of High-Speed Crafts
    2004 (engelsk)Inngår i: DESIGN 2004 conference, 2004Konferansepaper, Publicerat paper (Annet vitenskapelig)
    HSV kategori
    Identifikatorer
    urn:nbn:se:uu:diva-47957 (URN)
    Konferanse
    Design 2004
    Tilgjengelig fra: 2006-11-24 Laget: 2006-11-24 Sist oppdatert: 2014-05-13
    2. Bridging the gap between analysis and design: Improving existing driver interfaces with tools from the framwork of cognitive work analysis
    Åpne denne publikasjonen i ny fane eller vindu >>Bridging the gap between analysis and design: Improving existing driver interfaces with tools from the framwork of cognitive work analysis
    2006 (engelsk)Inngår i: Cognition, Technology & Work, ISSN 1435-5558, E-ISSN 1435-5566, Vol. 8, nr 1, s. 41-49Artikkel i tidsskrift (Fagfellevurdert) Published
    Abstract [en]

    Two studies of train driving are presented, both within the framework of cognitive work analysis. In the first study, the modelling tool abstraction–decomposition space is adapted to routine conditions, making the analysis more representative for normal procedures. A major contribution to these analyses was the use of the method for ‘collegial verbalisation’. One particular advantage with this method over other verbalisation methods is that it supplies the analysts with data that contain much more information, but not at the expense of being more subjective. On the contrary, this method produces think-aloud protocols from video-recordings that do not have to be interpreted by the researcher. From these analyses, it was possible to distinguish information that is an intrinsic part of the train driver task from information that is dependent on the configuration and design of the current support system. The analyses show that the driver works in three rather separate time intervals with a long-range, a short-term and an immediate sense of perspective. The driver switches between these while travelling between two stations. Based on these behaviour-shaping constraints, a prototype of a planning area of a driver interface was developed, making feed-forward planning possible for the driver. Four design iterations were completed, using a user-centred system design (UCSD) approach. Early tests show that the planning area of the interface supports the feed-forward decision strategy used by drivers who prefer an active driving style. However, the driver group also made substantial changes in the design, indicating that UCSD is an efficient tool in order to capture user competencies, and to bridge the gap between analysis and design.

    Emneord
    cognitive work analysis, driver interface, verbal protocols, user centred system design, participatory design, prototyping
    HSV kategori
    Identifikatorer
    urn:nbn:se:uu:diva-78792 (URN)10.1007/s10111-005-0018-4 (DOI)
    Tilgjengelig fra: 2006-03-30 Laget: 2006-03-30 Sist oppdatert: 2017-12-14bibliografisk kontrollert
    3. Collegial verbalisation: a case study on a new method on information acquisition
    Åpne denne publikasjonen i ny fane eller vindu >>Collegial verbalisation: a case study on a new method on information acquisition
    2007 (engelsk)Inngår i: Behaviour & Information Technology, ISSN 0144-929X, Vol. 26, nr 6, s. 535-543Artikkel i tidsskrift (Fagfellevurdert) Published
    HSV kategori
    Identifikatorer
    urn:nbn:se:uu:diva-14902 (URN)10.1080/01449290600801934 (DOI)000250361500009 ()
    Tilgjengelig fra: 2008-01-31 Laget: 2008-01-31 Sist oppdatert: 2018-01-12bibliografisk kontrollert
    4. Verbal reports and domain-specific knowledge: a comparison between collegial and retrospective verbalisation
    Åpne denne publikasjonen i ny fane eller vindu >>Verbal reports and domain-specific knowledge: a comparison between collegial and retrospective verbalisation
    2013 (engelsk)Inngår i: Cognition, Technology & Work, ISSN 1435-5558, E-ISSN 1435-5566, Vol. 15, nr 3, s. 239-254Artikkel i tidsskrift (Fagfellevurdert) Published
    Abstract [en]

    One way to investigate and account for the role of experience in dynamic decision-making tasks is to use a knowledge elicitation method, for example verbal protocols. Recently, methods for verbalisation by other subjects have been suggested as a way to elicit more information on thinking. One of these methods is here investigated in a quasi-experimental study on highly experienced and skilled train dispatchers. Collegial verbalisation is based on the procedure of videotaping practitioners while they perform their normal work tasks in their normal work setting. This is followed up by having a close colleague of the practitioner watch the video recordings and verbalise. The general hypothesis that verbal reports based on collegial verbalisations can provide protocol data that are close to the structure and content of verbal reports based on retrospective verbalisations was investigated. From this systematic comparison it is concluded that collegial verbalisations produce verbal protocols that are close to the retrospective verbal protocols on protocol and topic levels, but not on statement level. From this study, we conclude that the collegial protocols can be used as an independent source of data. It seems possible for a colleague to report verbally on a practitioners' observable behaviour in the same way as when the practitioner is doing a retrospective verbalisation and it may also be possible for a colleague to explain some of the non-observable behaviour of the practitioner.

    sted, utgiver, år, opplag, sider
    Springer London, 2013
    HSV kategori
    Forskningsprogram
    Människa-dator interaktion
    Identifikatorer
    urn:nbn:se:uu:diva-183343 (URN)10.1007/s10111-012-0223-x (DOI)000322162100001 ()
    Tilgjengelig fra: 2012-03-20 Laget: 2012-10-24 Sist oppdatert: 2018-01-12bibliografisk kontrollert
    5. Collegial verbalisation: The value of verbal reports from colleagues as subjects
    Åpne denne publikasjonen i ny fane eller vindu >>Collegial verbalisation: The value of verbal reports from colleagues as subjects
    (engelsk)Manuskript (preprint) (Annet vitenskapelig)
    HSV kategori
    Forskningsprogram
    Människa-dator interaktion
    Identifikatorer
    urn:nbn:se:uu:diva-215393 (URN)
    Tilgjengelig fra: 2014-01-13 Laget: 2014-01-13 Sist oppdatert: 2014-05-13
    6. Collegial collaboration for safety: Assessing situation awareness by exploring cognitive strategies
    Åpne denne publikasjonen i ny fane eller vindu >>Collegial collaboration for safety: Assessing situation awareness by exploring cognitive strategies
    2013 (engelsk)Inngår i: Past History and Future Challenges of Human Work Interaction Design (HWID): Generating Cross-domain Knowledge about Connecting Work Analysis and Interaction Design / [ed] Torkil Clemmensen, Bengt Sandblad, Arminda Lopes and Jose Abdelnour- Nocera, 2013, s. 35-40Konferansepaper, Publicerat paper (Fagfellevurdert)
    Serie
    Workshop Proceedings Series of the INTERACT 2013 Conference
    HSV kategori
    Forskningsprogram
    Människa-dator interaktion
    Identifikatorer
    urn:nbn:se:uu:diva-211403 (URN)978-0-620-58037-3 (ISBN)
    Konferanse
    Workshop at INTERACT 2013 – 14th IFIP TC13 Conference on Human-Computer Interaction, Cape Town, South Africa, September 2013
    Tilgjengelig fra: 2013-11-22 Laget: 2013-11-22 Sist oppdatert: 2014-05-13bibliografisk kontrollert
    7. Recognizing complexity: A prerequisite for skilled intuitive judgments and dynamic decisions
    Åpne denne publikasjonen i ny fane eller vindu >>Recognizing complexity: A prerequisite for skilled intuitive judgments and dynamic decisions
    2013 (engelsk)Inngår i: SPUDM24: Subjective Probability, Utility, and Decision Making, 2013, s. 194-Konferansepaper, Oral presentation with published abstract (Fagfellevurdert)
    HSV kategori
    Forskningsprogram
    Människa-dator interaktion
    Identifikatorer
    urn:nbn:se:uu:diva-214492 (URN)
    Konferanse
    SPUDM24 - Subjective Probability, Utility, and Decision Making Conference (SPUDM); 18-22 August 2013; IESE Business School, Barcelona, Spain
    Tilgjengelig fra: 2014-01-08 Laget: 2014-01-08 Sist oppdatert: 2014-05-13bibliografisk kontrollert
  • 175.
    Erlandsson, Mikael
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion.
    Jansson, Anders
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion.
    Verbal reports and domain-specific knowledge: a comparison between collegial and retrospective verbalisation2013Inngår i: Cognition, Technology & Work, ISSN 1435-5558, E-ISSN 1435-5566, Vol. 15, nr 3, s. 239-254Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    One way to investigate and account for the role of experience in dynamic decision-making tasks is to use a knowledge elicitation method, for example verbal protocols. Recently, methods for verbalisation by other subjects have been suggested as a way to elicit more information on thinking. One of these methods is here investigated in a quasi-experimental study on highly experienced and skilled train dispatchers. Collegial verbalisation is based on the procedure of videotaping practitioners while they perform their normal work tasks in their normal work setting. This is followed up by having a close colleague of the practitioner watch the video recordings and verbalise. The general hypothesis that verbal reports based on collegial verbalisations can provide protocol data that are close to the structure and content of verbal reports based on retrospective verbalisations was investigated. From this systematic comparison it is concluded that collegial verbalisations produce verbal protocols that are close to the retrospective verbal protocols on protocol and topic levels, but not on statement level. From this study, we conclude that the collegial protocols can be used as an independent source of data. It seems possible for a colleague to report verbally on a practitioners' observable behaviour in the same way as when the practitioner is doing a retrospective verbalisation and it may also be possible for a colleague to explain some of the non-observable behaviour of the practitioner.

  • 176. Estevez, B.
    et al.
    Pazos, M.
    Franco, J. M.
    Hast, Anders
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion.
    Recreating with photogrammetric techniques a submerged megalithic landscape: the case of the salas reservoir2015Inngår i: 3 Encontro Internacional de Arqueoloxia de Vilalba, 2015, s. 9-16Konferansepaper (Fagfellevurdert)
  • 177. Etterlin, P. E.
    et al.
    Ekman, S.
    Strand, Robin
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion.
    Olstad, K.
    Ley, C. J.
    Osteochondrosis, Synovial Fossae, and Articular Indentations in the Talus and Distal Tibia of Growing Domestic Pigs and Wild Boars2017Inngår i: Veterinary pathology, ISSN 0300-9858, E-ISSN 1544-2217, Vol. 54, nr 3, s. 445-456Artikkel i tidsskrift (Fagfellevurdert)
  • 178.
    Fakhrzadeh, Azadeh
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion.
    Computerized Cell and Tissue Analysis2015Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    The latest advances in digital cameras combined with powerful computer software enable us to store high-quality microscopy images of specimen. Studying hundreds of images manually is very time consuming and has the problem of human subjectivity and inconsistency. Quantitative image analysis is an emerging field and has found its way into analysis of microscopy images for clinical and research purposes. When developing a pipeline, it is important that its components are simple enough to be generalized and have predictive value. This thesis addresses the automation of quantitative analysis of tissue in two different fields: pathology and plant biology.

    Testicular tissue is a complex structure consisting of seminiferous tubules. The epithelial layer of a seminiferous tubule contains cells that differentiate from primitive germ cells to spermatozoa in a number of steps. These steps are combined in 12 stages in the cycle of the seminiferous epithelium in the mink. The society of toxicological pathology recommends classifying the testicular epithelial into different stages when assessing tissue damage to determine if the dynamics in the spermatogenic cycle have been disturbed. This thesis presents two automated methods for fast and robust segmentation of tubules, and an automated method of staging them. For better accuracy and statistical analysis, we proposed to pool stages into 5 groups. This pooling is suggested based on the morphology of tubules. In the 5 stage case, the overall number of correctly classified tubules is 79.6%.

    Contextual information on the localization of fluorescence in microscopy images of plant specimen help us to better understand differentiation and maturation of stem cells into tissues. We propose a pipeline for automated segmentation and classification of the cells in a whole cross-section of Arabidopsis hypocotyl, stem, or root. As proof-of-concept that the classification provides a meaningful basis to group cells for fluorescence characterization, we probed tissues with an antibody specific to xylem vessels in the secondary cell wall. Fluorescence intensity in different classes of cells is measured by the pipeline. The measurement results clearly show that the xylem vessels are the dominant cell type that exhibit a fluorescence signal.

    Delarbeid
    1. Analyzing Tubular Tissue in Histopathological Thin Sections
    Åpne denne publikasjonen i ny fane eller vindu >>Analyzing Tubular Tissue in Histopathological Thin Sections
    2012 (engelsk)Inngår i: 2012 INTERNATIONAL CONFERENCE ON DIGITAL IMAGE COMPUTING TECHNIQUES AND APPLICATIONS (DICTA), IEEE conference proceedings, 2012, s. 1-6Konferansepaper, Publicerat paper (Fagfellevurdert)
    sted, utgiver, år, opplag, sider
    IEEE conference proceedings, 2012
    HSV kategori
    Identifikatorer
    urn:nbn:se:uu:diva-188548 (URN)10.1109/DICTA.2012.6411735 (DOI)000316318400071 ()
    Konferanse
    International Conference on Digital Image Computing Techniques and Applications (DICTA), 3-5 Dec, 2012, Fremantle, AUSTRALIA
    Tilgjengelig fra: 2012-12-17 Laget: 2012-12-17 Sist oppdatert: 2015-06-03bibliografisk kontrollert
    2. Epithelial Cell Segmentation in Histological Images of Testicular Tissue Using Graph-Cut
    Åpne denne publikasjonen i ny fane eller vindu >>Epithelial Cell Segmentation in Histological Images of Testicular Tissue Using Graph-Cut
    2013 (engelsk)Inngår i: Image Analysis and Processing – ICIAP 2013: Part II, 2013, s. 201-208Konferansepaper, Publicerat paper (Fagfellevurdert)
    Abstract [en]

    Computerized image processing has provided us with valuable tools for analyzing histology images. However, histology images are complex, and the algorithm which is developed for a data set may not work for a new and unseen data set. The preparation procedure of the tissue before imaging can significantly affect the resulting image. Even for the same staining method, factors like delayed fixation may alter the image quality. In this paper we face the challenging problem of designing a method that works on data sets with strongly varying quality. In environmental research, due to the distance between the site where the wild animals are caught and the laboratory, there is always a delay in fixation. Here we suggest a segmentation method based on the structural information of epithelium cell layer in testicular tissue. The cell nuclei are detected using the fast radial symmetry filter. A graph is constructed on top of the epithelial cells. Graph-cut optimization method is used to cut the links between cells of different tubules. The algorithm is tested on five different groups of animals. Group one is fixed immediately, three groups were left at room temperature for 18, 30 and 42 hours respectively, before fixation. Group five was frozen after 6 hours in room temperature and thawed. The suggested algorithm gives promising results for the whole data set.

    Serie
    Lecture Notes in Computer Science, ISSN 0302-9743 ; 8157
    HSV kategori
    Identifikatorer
    urn:nbn:se:uu:diva-210299 (URN)10.1007/978-3-642-41184-7_21 (DOI)000329811200021 ()978-3-642-41183-0 (ISBN)978-3-642-41184-7 (ISBN)
    Konferanse
    17th International Conference on Image Analysis and Processing (ICIAP), Naples, Italy, September 9-13, 2013
    Tilgjengelig fra: 2013-11-05 Laget: 2013-11-05 Sist oppdatert: 2015-06-03bibliografisk kontrollert
    3. Computerized Study of Developmental Stages in Mink Testicular Tissue
    Åpne denne publikasjonen i ny fane eller vindu >>Computerized Study of Developmental Stages in Mink Testicular Tissue
    Vise andre…
    (engelsk)Manuskript (preprint) (Annet vitenskapelig)
    HSV kategori
    Identifikatorer
    urn:nbn:se:uu:diva-252411 (URN)
    Tilgjengelig fra: 2015-05-06 Laget: 2015-05-06 Sist oppdatert: 2015-06-03
    4. Precision automation of cell type classification and sub-cellular fluorescence quantification from laser scanning confocal images
    Åpne denne publikasjonen i ny fane eller vindu >>Precision automation of cell type classification and sub-cellular fluorescence quantification from laser scanning confocal images
    2016 (engelsk)Inngår i: Frontiers in Plant Science, ISSN 1664-462X, E-ISSN 1664-462X, Vol. 7, artikkel-id 119Artikkel i tidsskrift (Fagfellevurdert) Published
    Abstract [en]

    While novel whole-plant phenotyping technologies have been successfully implemented into functional genomics and breeding programs, the potential of automated phenotyping with cellular resolution is largely unexploited. Laser scanning confocal microscopy has the potential to close this gap by providing spatially highly resolved images containing anatomic as well as chemical information on a subcellular basis. However, in the absence of automated methods, the assessment of the spatial patterns and abundance of fluorescent markers with subcellular resolution is still largely qualitative and time-consuming. Recent advances in image acquisition and analysis, coupled with improvements in microprocessor performance, have brought such automated methods within reach, so that information from thousands of cells per image for hundreds of images may be derived in an experimentally convenient time-frame. Here, we present a MATLAB-based analytical pipeline to (1) segment radial plant organs into individual cells, (2) classify cells into cell type categories based upon Random Forest classification, (3) divide each cell into sub-regions, and (4) quantify fluorescence intensity to a subcellular degree of precision for a separate fluorescence channel. In this research advance, we demonstrate the precision of this analytical process for the relatively complex tissues of Arabidopsis hypocotyls at various stages of development. High speed and robustness make our approach suitable for phenotyping of large collections of stem-like material and other tissue types.

    Emneord
    automated image analysis; confocal microscopy; Arabidopsis; hypocotyl; automated phenotyping; code:matlab
    HSV kategori
    Forskningsprogram
    Datoriserad bildbehandling
    Identifikatorer
    urn:nbn:se:uu:diva-252412 (URN)10.3389/fpls.2016.00119 (DOI)000369802700001 ()
    Forskningsfinansiär
    Bio4EnergyVINNOVA
    Tilgjengelig fra: 2016-02-09 Laget: 2015-05-06 Sist oppdatert: 2017-12-04bibliografisk kontrollert
    5. Effect of pre-fixation delay and freezing on mink testicular endpoints for environmental research
    Åpne denne publikasjonen i ny fane eller vindu >>Effect of pre-fixation delay and freezing on mink testicular endpoints for environmental research
    Vise andre…
    2015 (engelsk)Inngår i: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 10, nr 5, artikkel-id e0125139Artikkel i tidsskrift (Fagfellevurdert) Published
    HSV kategori
    Forskningsprogram
    Datoriserad bildbehandling
    Identifikatorer
    urn:nbn:se:uu:diva-252410 (URN)10.1371/journal.pone.0125139 (DOI)000353887100081 ()25933113 (PubMedID)
    Tilgjengelig fra: 2015-05-01 Laget: 2015-05-06 Sist oppdatert: 2017-12-04bibliografisk kontrollert
  • 179.
    Fakhrzadeh, Azadeh
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion.
    Spörndly-Nees, Ellinor
    Swedish University of Agricultural Sciences.
    Holm, Lena
    Swedish University of Agricultural Sciences.
    Luengo Hendriks, Cris L.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion.
    Analyzing Tubular Tissue in Histopathological Thin Sections2012Inngår i: 2012 INTERNATIONAL CONFERENCE ON DIGITAL IMAGE COMPUTING TECHNIQUES AND APPLICATIONS (DICTA), IEEE conference proceedings, 2012, s. 1-6Konferansepaper (Fagfellevurdert)
  • 180.
    Fakhrzadeh, Azadeh
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion.
    Spörndly-Nees, Ellinor
    Swedish University of Agricultural Sciences.
    Holm, Lena
    Swedish University of Agricultural Sciences.
    Luengo Hendriks, Cris L.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion.
    Automated measurement of epithelial height of testicular tissue2012Inngår i: Proceedings of Swedish Society for Image Analysis, SSBA 2012, Stockholm: KTH Royal Institute of Technology, 2012Konferansepaper (Annet vitenskapelig)
  • 181.
    Fakhrzadeh, Azadeh
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion.
    Spörndly-Nees, Ellinor
    Swedish University of Agricultural Sciences.
    Holm, Lena
    Swedish University of Agricultural Sciences.
    Luengo Hendriks, Cris L.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion.
    Epithelial Cell Layer Segmentation UsingGraph-cut and Its Application in TesticularTissue2013Konferansepaper (Fagfellevurdert)
  • 182.
    Fakhrzadeh, Azadeh
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion.
    Spörndly-Nees, Ellinor
    Swedish University of Agricultural Sciences.
    Holm, Lena
    Swedish University of Agricultural Sciences.
    Luengo Hendriks, Cris L.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion.
    Epithelial Cell Segmentation in Histological Images of Testicular Tissue Using Graph-Cut2013Inngår i: Image Analysis and Processing – ICIAP 2013: Part II, 2013, s. 201-208Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Computerized image processing has provided us with valuable tools for analyzing histology images. However, histology images are complex, and the algorithm which is developed for a data set may not work for a new and unseen data set. The preparation procedure of the tissue before imaging can significantly affect the resulting image. Even for the same staining method, factors like delayed fixation may alter the image quality. In this paper we face the challenging problem of designing a method that works on data sets with strongly varying quality. In environmental research, due to the distance between the site where the wild animals are caught and the laboratory, there is always a delay in fixation. Here we suggest a segmentation method based on the structural information of epithelium cell layer in testicular tissue. The cell nuclei are detected using the fast radial symmetry filter. A graph is constructed on top of the epithelial cells. Graph-cut optimization method is used to cut the links between cells of different tubules. The algorithm is tested on five different groups of animals. Group one is fixed immediately, three groups were left at room temperature for 18, 30 and 42 hours respectively, before fixation. Group five was frozen after 6 hours in room temperature and thawed. The suggested algorithm gives promising results for the whole data set.

  • 183. Fath, Aaron J.
    et al.
    Lind, Mats
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion.
    Bingham, Geoffrey P.
    Perception of time to contact of slow- and fast-moving objects using monocular and binocular motion information2018Inngår i: Attention, Perception & Psychophysics, ISSN 1943-3921, E-ISSN 1943-393X, Vol. 80, nr 6, s. 1584-1590Artikkel i tidsskrift (Fagfellevurdert)
  • 184.
    Fors, Per
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Industriell teknik.
    Laaksoharju, Mikael
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Bildanalys och människa-datorinteraktion. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för visuell information och interaktion.
    An Intuition-Based Approach to Sustainable ICT: Insights from Eco-Ethica2019Inngår i: Tetsugaku Companion to Japanese Ethics and Technology / [ed] Thomas Taro Lennerfors, Kiyoshi Murata, Springer, 2019, s. 181-200Kapittel i bok, del av antologi (Fagfellevurdert)
    Abstract [en]

    In this chapter we draw on the Japanese philosopher Tomonobu Imamichi in order to further develop our understanding of the relationship between Information and Communications Technology (ICT) and ecological sustainability. Our main contribution is an intuition-based approach to design for sustainability, which, for instance, means to design ICT products in a way that invokes feelings of wastefulness or misuse if used in an unsustainable manner. In contrast to persuasive approaches – which have mainly focused on raising awareness, nudging decisions, or stimulating positive behavior through gamification – we rely on the human tendency to unconsciously and effortlessly formulate mental heuristics or intuitions, when exposed to consistent feedback. The claim is that people can learn to associate perceptual cues with environmental impact, and by that will be empowered to make more sustainable choices. Based on the implications of Imamichi’s Eco-ethica, we suggest that this approach can be more fruitful for encouraging sustainable choices than both awareness raising and behavior manipulation.

  • 185.
    Frezza, Stephen
    et al.