Endre søk
Begrens søket
333435363738 1751 - 1800 of 1857
RefereraExporteraLink til resultatlisten
Permanent link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Treff pr side
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sortering
  • Standard (Relevans)
  • Forfatter A-Ø
  • Forfatter Ø-A
  • Tittel A-Ø
  • Tittel Ø-A
  • Type publikasjon A-Ø
  • Type publikasjon Ø-A
  • Eldste først
  • Nyeste først
  • Skapad (Eldste først)
  • Skapad (Nyeste først)
  • Senast uppdaterad (Eldste først)
  • Senast uppdaterad (Nyeste først)
  • Disputationsdatum (tidligste først)
  • Disputationsdatum (siste først)
  • Standard (Relevans)
  • Forfatter A-Ø
  • Forfatter Ø-A
  • Tittel A-Ø
  • Tittel Ø-A
  • Type publikasjon A-Ø
  • Type publikasjon Ø-A
  • Eldste først
  • Nyeste først
  • Skapad (Eldste først)
  • Skapad (Nyeste først)
  • Senast uppdaterad (Eldste først)
  • Senast uppdaterad (Nyeste først)
  • Disputationsdatum (tidligste først)
  • Disputationsdatum (siste først)
Merk
Maxantalet träffar du kan exportera från sökgränssnittet är 250. Vid större uttag använd dig av utsökningar.
  • 1751.
    Werner Åström, Petter
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsmaterial.
    Experimental study on innovative connections for large span structural timber trusses2019Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Large span timber trusses are usually built with glulam. One problem with large span glulam trusses is that the connections needed to transfer the load between truss members are often complex and expensive. Another issue is transportation. Building large span trusses out of structural timber instead, could be a way of simplifying the connections and at the same time increase the degree of on-site construction and thereby solving the transportation problem.In this study, a total of 18 laboratory tests were performed with the purpose of investigating the tensile strength and the load slip behavior of different connection designs for large span structural timber trusses. Six different test groups corresponding to six different connection designs were tested. The materials used include members made of C24 timber and gusset plates made of birch plywood, aluminum, and steel. Screws were used as fasteners for five test groups and adhesive was used for one group. The influence of different reinforcement techniques including reinforcement screws and added aluminum sheets was studied.The results showed a ductile failure behavior for all test groups except for the group where adhesive was used. However, a decrease of ductility was observed for groups were aluminum sheets were used on the outsides of the mid placed plywood gusset plate. A 12-17 % increase in capacity was observed due to the presence of aluminum sheets. The reinforcement screws had no significant effect on the capacity. However, the presence of reinforcement screws did lead to a reduction in scatter both regarding capacity and stiffness.

    Fulltekst (pdf)
    fulltext
  • 1752.
    Westman, Jonas
    et al.
    KTH, Skolan för industriell teknik och management (ITM), Maskinkonstruktion (Inst.), Mekatronik.
    Nyberg, Mattias
    Specifying and Structuring Requirements on Cyber-Physical Systems using Contracts2014Rapport (Annet vitenskapelig)
    Abstract [en]

    A contract splits the responsibilities between a component and its environment into a guarantee that expresses an intended property under the responsibility of the component, given that the environment fulfills the assumptions. Building on recent works where contracts are proposed as a means to meet the challenges in the design of Cyber-Physical Systems (CPSs), a general contract framework is presented that supports the modelling of both individual components and architectures of CPS - at all levels of design, as well as the structuring and specification of requirements on the components using contracts. To facilitate the specification of requirements, constraints that restrict the portsover which a contract is expressed are introduced to serve as sanity checks that the component and the environment meet their respective responsibilities. Furthermore, a new graph, called a contract structure is introduced to support the structuring and tracing of requirements on a CPS using contracts. As a proof-of-concept, the framework is used to specify and structure safety requirements on an industrial system, as proposed by ISO 26262.

    Fulltekst (pdf)
    fulltext
  • 1753.
    White, Peta
    KTH, Tidigare Institutioner (före 2005), Tal, musik och hörsel.
    A study of the effects of vocal intensity variation on children’s voices using long-term average spectrum (LTAS) analysis1997Inngår i: TMH-QPSR, ISSN 1104-5787, Vol. 38, nr 1, s. 119-131Artikkel i tidsskrift (Annet vitenskapelig)
    Abstract [en]

    It has been well documented in adult studies that, as overall vocal intensity increases, the resulting increase in partials is greater in higher than in lower frequencies. Investigations involving children’s normal productions are uncommon however, and there is, as a consequence, little knowledge of how children’s vocal function differs from that of adults. Using long term average spectrum (LTAS) analysis, this study investigates the effects of vocal intensity variation on the voices of fifteen schoolchildren aged 10 years, singing in soft, mid and loud voice. Mean amplitudes, dynamic range, and gain in each frequency band were calculated, and means are presented as normative data for children’s vocal productions. Observed systematic effects of vocal loudness as well as male-female differences in the averaged spectra are discussed, and comparisons with adult data made.

  • 1754.
    White, Peta
    KTH, Tidigare Institutioner (före 2005), Tal, musik och hörsel.
    Formant frequency analysis of children’s spoken and sung vowels using sweeping fundamental frequency production1998Inngår i: TMH-QPSR, ISSN 1104-5787, Vol. 1-2, s. 43-52Artikkel i tidsskrift (Annet vitenskapelig)
    Abstract [en]

    High-pitched productions present difficulties in formant frequency analysis due to wide harmonic spacing and poorly defined formants. As a consequence, there is little reliable data regarding children’s spoken or sung vowel formants. In order to circumvent the problem of wide harmonic spacing, 29 11-year-old Swedish children were asked to produce four sustained spoken and sung vowels with a sweeping F0. F1 and F2 measurements were taken. Experienced choir singers were used as subjects in order to minimise the larynx height adjustments associated with pitch variation in less-skilled subjects. Results showed significantly higher formant frequencies for speech than for singing. Formants were consistently higher in females than in males suggesting longer vocal tracts in these preadolescent boys. Furthermore, formant scaling demonstrated vowel-dependent differences between boys and girls suggesting non-uniform differences in male and female vocal tract dimensions. These vowel-dependent sex differences were not consistent with adult data.

  • 1755.
    White, Peta
    KTH, Tidigare Institutioner (före 2005), Tal, musik och hörsel.
    Long-term average spectrum (LTAS) analysis of developmental changes in children's voices2000Inngår i: TMH-QPSR, ISSN 1104-5787, Vol. 41, nr 3, s. 85-88Artikkel i tidsskrift (Annet vitenskapelig)
    Abstract [en]

    Long­term average spectrum (LTAS) analysis has been found to offer representative information on voice timbre. It provides spectral information averaged over a period of time and is particularly useful when persistent spectral features are under investigation. The aim of this study was to compare perceived and actual sex of the recorded voices of children to the LTAS characteristics. A total of 320 children, 20 boys and 20 girls in each of eight age groups (range 3 to 12 years), were recorded singing a nursery rhyme. In an earlier analysis, the recorded voices were evaluated with respect to perceived sex by expert listeners. Mean LTAS analysis for boys and girls groups revealed a peak at 5 kHz for children consistently perceived as boys (whether male or female in actuality), and a flat spectrum at 5 kHz for children consistently perceived as girls.

  • 1756.
    White, Peta
    et al.
    KTH, Tidigare Institutioner (före 2005), Tal, musik och hörsel.
    Sundberg, Johan
    KTH, Tidigare Institutioner (före 2005), Tal, musik och hörsel.
    Spectrum effects of subglottal pressure variation in professional baritone singers2000Inngår i: TMH-QPSR, ISSN 1104-5787, Vol. 41, s. 29-32Artikkel i tidsskrift (Annet vitenskapelig)
    Abstract [en]

    The audio signal from five professional operatic baritone singers was analysed by means of spectrum analysis. Each subject sang a sustained diminuendo, from loudest to softest phonation, three times on the vowels [a:] and [ä:] at fundamental frequencies representing 25%, 50% and 75% of his total pitch range as measured in semitones. During the diminuendi the subjects repeatedly inserted the consonant [p] so that associated subglottal pressures could be estimated from the oral pressure during [p]­occlusions. Pooling the three takes of each condition, ten subglottal pressures (PS), equidistantly spaced between highest and lowest, were selected for analysis along with the corresponding production of [a:] and [ä:] vowels. The levels of the first formant and the singer’s formant, L1 and LSF, were measured as a function of increasing subglottal pressure. Averaged across subjects, an increase in PS resulted in (a) an increase in L1 and (b) a decrease in L1-LSF. This implies that a 10 dB increase at or near 600 Hz was, on average, accompanied by an increase of 17 dB of the level near 3 kHz.

  • 1757.
    White Sjölander, Peta
    KTH, Skolan för datavetenskap och kommunikation (CSC), Tal, musik och hörsel, TMH, Musikakustik.
    A study of the effects of vocal intensity variation on children’s voices using long-term average spectrum (LTAS) analysis1998Inngår i: Logopedics, Phoniatrics, Vocology, ISSN 1401-5439, E-ISSN 1651-2022, Vol. 23, nr 3, s. 111-120Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Studies of adult voices have shown that, as vocal intensity is increased, the partials at higher frequencies gain more than those at lower frequencies. Investigations involving children's normal productions are uncommon, however, and there is, consequently, little knowledge of how children's vocal function differs from that of adults. Using LTAS analysis, this study investigates the effects of vocal intensity variation on the voices of 10-year-old schoolchildren singing in soft, mid and loud voice. A frequency-dependent gain factor was calculated which showed the increase in level to have been greater for partials at higher than at lower frequencies for these children. Also, gain within frequency bands was often different between boys and girls, although this was not demonstrated statistically.

    Fulltekst (pdf)
    fulltext
  • 1758. Whitlow, H. J.
    et al.
    Östling, Mikael
    KTH, Skolan för informations- och kommunikationsteknik (ICT).
    Rutherford back-scattering spectrometry and recoil spectrometry2007Inngår i: Surface Characterization: A User's Sourcebook, Wiley-Blackwell, 2007, s. 254-271Kapittel i bok, del av antologi (Annet vitenskapelig)
  • 1759.
    Widmer, Tobias
    KTH, Skolan för industriell teknik och management (ITM), Industriell ekonomi och organisation (Inst.), Entreprenörskap och Innovation. -.
    Assessing the strengths and limitations of Business Model Frameworks for Product Service Systems in the Circular Economy: Why Canvas and co. are not enough2016Independent thesis Advanced level (degree of Master (One Year)), 10 poäng / 15 hpOppgave
    Abstract [en]

    Today’s value chains rely strongly on a virgin material to ‘take-make-dispose’ products.One way to reduce that dependency on finite resources is a circular economy (CE).Different pillars form the concept, this research paper focuses on Product-ServiceSystems (PSS) in which a customer instead of buying a product for example only paysfor the use of one.Companies who want to transfer towards a circular business model (BM) facetremendous organisational challenges. They cannot just modify some parts of theiroperations, they have to change the entire BM. Much of the literature and t on BM is aresult of e-business and therefore not necessarily suitable for circular BM.To investigate if the current tools are suitable, the aim of the research is to answer thequestion: Do existing BM Frameworks cover the information requirements for PSS BMswithin the CE.The paper provides a literature review on two bodies of knowledge. First it explains thecharacteristics of PSSs in the context of a CE; secondly, it describes the different BMframeworks which are assessed in this research.To answer the research question, three sub-questions are formed on values, activitiesand stakeholders of a BM to be applied on the BM frameworks. The research follows atwo-step approach to answer these sub-questions, in a first step 9 experts fromacademia, consultancy and business were interviewed on characteristics of PSSs.Based on these characteristics, 26 questions were defined to assess the strength andlimitations of the 9 BM frameworks.As the analysis of this assessment shows, future work is necessary to develop suitableBM frameworks for PSSs and scaled up to the entire CE. The research does notpropose a new BM framework but rather points on lacks in current ones and suggestspossible further research to locate these lacks. Further, the two-step approach as aresearch methodology can be used to connect and assess any kind of expertknowledgewith existing literature or frameworks.

    Fulltekst (pdf)
    fulltext
  • 1760. Wieczorek, H.
    et al.
    Goedicke, A.
    Edström, Fredrik
    KTH.
    Degenhardt, C.
    Botterweck, H.
    Bippus, R.
    Collimator spatial resolution2005Inngår i: 2005 IEEE Nuclear Science Symposium Conference Record, 2005, s. 1717-1721Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Pixellated detectors based on cadmium-zinc telluride (CZT) are a promising alternative to Nal-based SPECT cameras. The performance of either system Is quantitatively described In terms of resolution and sensitivity. This Investigation Is based on an analytical model published earlier, describing SPECT collimators according to the NEMA definitions of planar sensitivity and system spatial resolution without scatter. We have extended the model to Include the effect of collimator hole shape and orientation as well as collimator and detector penetration. Equations for spatial resolution are derived for Nal and CZT based SPECT systems with hexagonal, round or square parallel-hole collimators and with pinhole collimators. Standard equations for spatial resolution are valid only for square hole collimators along one of the detector axes. In any other direction, spatial resolution Is higher. The exact values depend on the hole shape and on the ratio of object-detector distance to collimator length. For pixellated pinhole detectors, similar corrections depending on the ratio of detector pixel size to the diameter of a point source projected on the detector apply. In scintillation cameras, spatial resolution Is not only Influenced by the average absorption depth In the scintillator, but It Is strongly affected by the parallax effect of the coillmator hole. Spatial resolution Is therefore lower than usually thought. We present a model that describes the performance of current SPECT collimators and permits to optimize future detector systems for high Image quality.

  • 1761. Wiesner, S.
    et al.
    Seregni, M.
    Freitag, M.
    Baalsrud Hauge, Jannicke
    KTH. University of Bremen, Germany.
    Silvestro, A.
    Thoben, K. -D
    Effects of environmental dynamicity on requirements engineering for complex systems2017Inngår i: IFIP WG 5.7 International Conference on Advances in Production Management Systems, APMS 2017, Springer, 2017, Vol. 513, s. 255-262Konferansepaper (Fagfellevurdert)
    Abstract [en]

    With customers demanding more and more holistic answers to their problems, solution providers respond with complex systems, integrating product, service and ICT elements into their offer. These solutions need to be aligned to a high number of requirements, coming not only from the individual customer but also from an environment of network partners, technology providers and other stakeholders. Especially for Product-Service Systems, where the solution provider takes responsibility in the operational phase, this environment is dynamic over the system life cycle. Stakeholders may enter or leave, as well as changing needs and technological capabilities. This makes the requirements towards the solution volatile, demanding a suitable Requirements Engineering approach. In this paper, it is discussed how environmental dynamicity can be monitored for its effect on requirements, with a special focus on organizational issues. Through a literature review and industrial case studies it is analysed, how it can be ensured that environmental changes can be taken into account in Requirements Engineering, leading to an optimal system configuration to address the customer problem.

  • 1762.
    Wiktorsson, Magnus
    et al.
    Mälardalens högskola, Innovation och produktrealisering.
    Södergren, Birgitta
    Uppsala University, Uppsala, Sweden.
    Asplund, Ola
    IF Metall, Stockholm, Sweden .
    Exploring Site roles in Global Corporations: Balancing Local identity to Global responsibility2016Inngår i: 23rd EurOMA conference EUROMA 2016, 2016Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This paper presents how the lead plant role within an international manufacturing network (IMN) is expressed from a site perspective, in relation to key competitive factors. A participative observational study of a workshop series with five Swedish manufacturing sites, all working within international companies, showed how the sites’ interests challenges and supports the interests of the IMNs. The lead plants are to lead the development and dissemination of new knowledge, but still being competitive in efficiency and delivery. Strong positions within the six analysed competitive factors were generally expressed as positive abilities for being a lead plant within an IMN.

  • 1763. Wild, F.
    et al.
    Scott, P.
    Lefrere, P.
    Karjalainen, J.
    Helin, K.
    Naeve, Ambjörn
    KTH, Skolan för datavetenskap och kommunikation (CSC), Medieteknik och grafisk produktion, Media (stängd 20111231).
    Isaksson, Erik
    KTH, Skolan för datavetenskap och kommunikation (CSC), Medieteknik och interaktionsdesign, MID.
    Towards data exchange formats for learning experiences in manufacturing workplaces2014Inngår i: CEUR Workshop Proceedings, 2014, s. 23-33Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Manufacturing industries are currently transforming, most notably through the introduction of advanced machinery and increasing degrees of automation. This has caused a shift in skills required, calling for a skills gap to be filled. Learning technology needs to embrace this change and with this contribution, we propose a process model for learning by experience to understand and explain learning under these changed conditions. To put this process into practice, we propose two interchange formats for capturing, sharing, and re-enacting pervasive learning activities and for describing workplaces with involved things, persons, places, devices, apps, and their set-up.

  • 1764.
    Wilhelmsson, Emil
    et al.
    KTH, Skolan för teknikvetenskaplig kommunikation och lärande (ECE).
    Berg, Marcus
    KTH, Skolan för teknikvetenskaplig kommunikation och lärande (ECE).
    Konceptförslag för framtagning av undervisningsmaterial: En studie kring högstadielärares behov inom teknikundervisningen2017Independent thesis Advanced level (professional degree), 20 poäng / 30 hpOppgave
    Abstract [sv]

    Syftet med denna studie är att undersöka vilka områden lärare anser vara problematiska att undervisa om och hur de anser att ett undervisningsmaterial bör vara utformat i teknikämnet. Utifrån deras önskemål och behov har det tagits fram ett konceptförslag som kan användas vid skapande av undervisningsmaterial för teknikundervisningen på högstadiet.

    Det teoretiska ramverk som används är en kvalitativ fallstudie ur ett socialkonstruktivistiskt perspektiv och relaterad forskning på lärande.

    I studien har fokusgruppsintervjuer med tekniklärare genomförts. Resultatet visar att områdena styr- och reglerteknik, informations- och kommunikationsteknik samt elektroteknik upplevs, av lärarna, som svåra att undervisa om. Vidare tyder resultatet på att ett undervisningsmaterial bör innehålla vissa specifika delar såsom tydliga uppgifter, kopplingar till läroplanen för grundskolan, förskoleklasser och fritidshem (Lgr 11) samt bedömningsmatriser.

    I studien redovisas ett konceptförslag som kan utgöra ett underlag till teknikundervisningen på högstadiet vilket är baserat på ABB:s och lärarnas framställda önskemål.

    Fulltekst (pdf)
    fulltext
  • 1765. Williams, P.
    et al.
    Kirby, R.
    Hill, J.
    Åbom, Mats
    KTH, Skolan för teknikvetenskap (SCI), Farkost och flyg, MWL Marcus Wallenberg Laboratoriet.
    Malecki, C.
    Reducing low frequency tonal noise in large ducts using a hybrid reactive-dissipative silencer2018Inngår i: Applied Acoustics, ISSN 0003-682X, E-ISSN 1872-910X, Vol. 131, s. 61-69Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Noise generated by fans or turbines normally consists of a combination of narrow and broadband noise. To lower transmitted noise levels, it is attractive to use a combination of reactive and dissipative elements. However, this approach presents a number of challenges for larger systems. This is because reactive elements are commonly placed around the duct circumference where they are normally only effective up to the frequency at which the first higher order mode cuts on in the duct. For larger systems, this means that reactive elements work only in the low, and often very low, frequency range, whereas dissipative elements, which are distributed across the duct cross-section, generally work well in the medium to high frequency range. This can cause noise problems in the low to medium frequency range in larger systems. This article presents an alternative approach for delivering noise attenuation over the low to medium frequency range that is suitable for application in larger duct systems. This approach takes advantage of those splitter silencer designs commonly used in larger systems to integrate a reactive element into the splitter design. This delivers a hybrid splitter that uses a combination of dissipative and reactive elements so that the reactive element partitions the main airway. This has the advantage of introducing a quasi-planar transverse sound pressure field for each resonator in the low to medium frequency range, including frequencies above the first cut-on. It is demonstrated using predictions and measurements taken for a number of example silencers, that this approach enables reactive elements to work over an extended low to medium frequency range, including at frequencies above the first cut-on mode in the main duct. Accordingly, it is shown that a hybrid dissipative-reactive splitter design is capable of delivering improved levels of attenuation in the crucial low to medium frequency range.

  • 1766.
    Winberg-Wang, Helen
    et al.
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Kemiteknik.
    Neretnieks, Ivars
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Kemiteknik.
    Voutilainen, Mikko
    Univ Helsinki, Dept Chem, Helsinki, Finland..
    A Note on the Use of Uranine Tracer to Visualize Radionuclide Migration Experiments: Some Observations and Problems2019Inngår i: Nuclear Technology, ISSN 0029-5450, E-ISSN 1943-7471, Vol. 205, nr 7, s. 964-977Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Uranine is a dye commonly used in tracer experiments; it is chosen for its high visibility even at low concentrations. Uranine solutions are slightly denser than water at the same temperature. However, in laboratory experiments uranine solutions have been known to occasionally show unpredictable flow behaviors. This paper investigates the possible effect of light-induced density change to explain some of these behaviors. Uranine has a wide light absorption spectrum for visible light, which can heat the dye solution and lower its density to below that of the surrounding water, which induces buoyancy-driven flow. Simulations are made in both one dimension and two dimensions to determine the extent of the effect. The results are then compared to different experiments with unanticipated flow patterns.

  • 1767. Wissmar, S. G. E.
    et al.
    Kolahdouz, Mohammadreza
    KTH, Skolan för informations- och kommunikationsteknik (ICT).
    Yamamoto, Y.
    Tillack, B.
    Vieider, C.
    Andersson, J. Y.
    Radamsson, Henry H.
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Mikroelektronik och Informationsteknik, IMIT.
    Monocrystalline SiGe for high-performance uncooled thermistor2007Inngår i: 2007 International Semiconductor Device Research Symposium, ISDRS, 2007Konferansepaper (Fagfellevurdert)
  • 1768.
    Woerli, Baptiste
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Bro- och stålbyggnad.
    Parametric design and optimization of pipe bridges: Automatizing of design process and cost optimization2019Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Recent advances in computer intelligence have led to the development of a number of optimization algorithms, used to solve complex problems. They have the potential to find optimal or near-optimal solutions in a reasonable time frame. Structural optimization is a field where such algorithms are used to optimize the design of structures. Despite the great amount of published research, the practice does not reflect that progress as the results usually concern small or unrealistic problems. Simultaneously, tools for automating tasks in the design process are being developed to help the designer in repetitive and complex actions. Made to be easily usable, they are today fully implemented in largely used softwares and are thus ready to become an everyday tool for designers. Designs based on a limited number of parameters are also especially adapted for an optimization process to be implemented. Combining parametric design and optimization has great potential in the development of the design practice among engineers and this thesis is addressing the need for a practical usage of optimization by presenting a software application for automated design and optimization of pipe bridges. Used as a preliminary design, limited in its details and complex layout, it shows the opportunities of using computational methods in structural engineering. This thesis introduces the concepts of parametric design and optimization in structural engineering practice, explains how the software application works and presents a case study carried out to evaluate the results. The results of the case study suggest a great potential in cost saving. Yet, the speeding up of the process and the opportunity of working on an adaptable design is perhaps the greatest benefit that would make designers turn to such practice. These findings show that the current tools for parametric design and optimization are robust enough and ready to use in order to extend the design practice and obtain better solutions.

  • 1769.
    Wong, Catherine
    et al.
    KTH, Skolan för industriell teknik och management (ITM), Industriell ekonomi och organisation (Inst.).
    Lau, Tat Pui
    KTH, Skolan för industriell teknik och management (ITM), Industriell ekonomi och organisation (Inst.).
    The Roles of Branding for a Brand Entering Overseas Markets: A Case Study of a Danish Butter Launching in Hong Kong with Success2011Independent thesis Advanced level (degree of Master (One Year)), 15 poäng / 22,5 hpOppgave
    Abstract [en]

    Purpose – The purpose ofthis research is to investigate how branding is applied in a challengingindustry for an overseas market.  In other words, we would look into the aspects that are important for building and strengthening a brand in overseas market.

    Design/Methodology/Approach – Our qualitative research is developed according to the interpretive approach which seeks to understand the aspects of brandings foroverseas market.  This research would beconducted as a deductive study; the validity of present knowledge would bedemonstrated.  Qualitative approach isapplied for identifying the aspects in a successful launching of a brand in anoverseas market.

    Findings – This research demonstrates that branding has been involving inlaunching of brands to overseas markets. The case study indicates that brand portfolio, brand identity and brandpositioning are essential in extending brands to overseas markets.

    Practical Implications – It serves as supplementary andreference information for brand management in marketing plan for globalmarkets, especially in food industry.

    Originality/Value – The originality of this paper lies in its knowledge area ofbranding, which uses brand portfolio, brand identity and brand positioningliteratures and journals to examine the role of branding in practical case.

    Keywords Brand Portfolio, Brand Identity, Brand Positioning, Denmark, HongKong, Food Industry

    Paper Type Research paper

    Fulltekst (pdf)
    fulltext
  • 1770.
    Wosinska, Lena
    et al.
    KTH.
    Lin, Rui
    KTH.
    Cheng, Yuxin
    KTH.
    Chen, Jiajia
    KTH.
    Optical Network Architectures and Technologies for Datacenters2017Inngår i: 2017 IEEE PHOTONICS SOCIETY SUMMER TOPICAL MEETING SERIES (SUM), IEEE , 2017, s. 111-112, artikkel-id 8012675Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The paper highlights the challenges related to the increasing importance of datacenter services, leading to dramatically growing datacenter traffic. The advantages of using photonic technology in intra-datacenter networks are discussed and a cross-layer view for network architecture design is presented.

  • 1771.
    Wosinski, Lech
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik. KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
    Sun, Xu
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik. KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
    Thylén, Lars
    KTH, Skolan för bioteknologi (BIO), Teoretisk kemi och biologi. KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
    Nanophotonics and hybrid plasmonics: Different technologies and applications2017Inngår i: Integrated Optics: Physics and Simulations III, SPIE - International Society for Optical Engineering, 2017, Vol. 10242, artikkel-id 1024202Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This paper gives a review of the recent progresses in our research on nanophotonics and hybrid plasmonic geometries, structures and devices. In the first part we present SOI-nanowire-based integrated components. The concept and different configurations of hybrid plasmonic structures will be then discussed. Finally different fabricated devices for applications in optical interconnects and sensing will be presented and characterized.

  • 1772.
    Wu, Hongwen
    et al.
    KTH.
    Brunberg, Johan
    Altimira, Mireia
    KTH, Skolan för teknikvetenskap (SCI), Mekanik.
    Bratt, Niclas
    Nyberg, Henrik
    Cronhjort, Andreas
    KTH, Skolan för industriell teknik och management (ITM), Maskinkonstruktion (Inst.), Förbränningsmotorteknik.
    Peciura, Justinas
    Semi-Empirical CFD Transient Simulation of Engine Air Filtration Systems2016Inngår i: SAE International Journal of Passenger Cars - Mechanical Systems, ISSN 1946-3995, E-ISSN 1946-4002, Vol. 9, nr 1, s. 310-320Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    To improve fuel efficiency and facilitate handling of the vehicle in a dense city environment, it should be as small as possible given its intended application. This downsizing trend impacts the size of the engine bay, where the air filter box has to be packed in a reduced space, still without increased pressure drop, reduced load capacity nor lower filtering efficiency. Due to its flexibility and reduced cost, CFD simulations play an important role in the optimization process of the filter design. Even though the air-flow through the filter box changes as the dust load increases, the current modeling framework seldom account for such time dependence. Volvo Car Corporation presents an industrial affordable model to solve the time-dependent dust load on filter elements and calculate the corresponding flow behavior over the life time of the air filter box. The implemented semi-empirical simulation algorithm integrates several sub-models derived from different studies on flows over pleated filters. This work also introduces an experimental method to record the dust pattern on the filter element in order to validate the numerical results. Test results show that the overall dust load as well as its distribution within the filter element can be estimated accurately.

  • 1773.
    Wu, Meixian
    KTH, Skolan för industriell teknik och management (ITM).
    Brand management in SMEs in Sweden2018Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    SMEs have been developing rapidly in Sweden since the last decade; many of them have developed a strong brand and went global. Brands can be utilized as a tool for people involved in the ecosystem to consistently communicate with the stakeholders. On the customers’ side, decisions on purchasing certain products are often made by symbolic attributes. According to studies, brand management can benefit an organization’s performance. Brand management is critical for the substantiality of SMEs. Many studies have been done on brand management in larger organizations. Only some research has been done on SMEs brand management, from which it was concluded that SMEs placed very little or no priority on brand management. In this thesis, the author studies brand management in SMEs in Sweden, by using Wong and Merrilees’s model (2005) on three archetypes of brand orientation. The aim of this study is to get insights on what brand-related activities can help with the goal of heightening brand awareness for customers. This research is done by a qualitative study based on three in-depth interviews undertaken with small-sized organizations and a supplementary desktop research with data from authority.

    Fulltekst (pdf)
    Master thesis-Meixian Wu
  • 1774. Wu, X.
    et al.
    Pang, J.
    Yang, Tao
    KTH, Skolan för elektro- och systemteknik (EES), Reglerteknik. KTH, Skolan för elektro- och systemteknik (EES), Centra, ACCESS Linnaeus Centre.
    Anti-windup design for Active Disturbance Rejection Control2014Inngår i: Proceedings of the 33rd Chinese Control Conference: July 28-30, 2014, Nanjing, China, IEEE Computer Society, 2014, s. 2389-2395Konferansepaper (Fagfellevurdert)
    Abstract [en]

    An anti-windup compensate algorithm for active disturbance rejection mechanism is proposed in this paper. This paradigm extends the traditional anti-windup scheme to the Active Disturbance Rejection Control (ADRC) mechanism, to deal with the input saturation nonlinearity and meanwhile reject the disturbance automatically by using Extended State Observer (ESO). The output of anti-windup compensator is treated as a part of unknown disturbances and is introduced into the ESO, which can online observe both internal and external disturbances (parameter uncertainties and model mismatches). The controller input is yielded by using a nonlinear feedback combination, and it is used to compensate the integrator windup caused by the saturation nonlinearity element. On the other hand, in order to determine the parameters of the ESO and the anti-windup compensator feedback gain, the L2 gain is adopted. The effectiveness and the robustness against model and parameter uncertainties of the proposed method is verified by an example of the seeker platform.

  • 1775.
    Wuorimaa, Olivia
    et al.
    KTH, Skolan för industriell teknik och management (ITM), Industriell ekonomi och organisation (Inst.).
    Klimkeit, Katharina
    KTH, Skolan för industriell teknik och management (ITM), Industriell ekonomi och organisation (Inst.).
    Preferred Approaches of Industrial Marketing by Innovative Technology Firms to Enhance the Diffusion of Innovation in the Financial Industry2019Independent thesis Advanced level (degree of Master (One Year)), 10 poäng / 15 hpOppgave
    Abstract [en]

    This paper will discuss the challenges that arise in the business-to-business marketing process in the area of highly technological and innovative solutions. The authors will depict the processes that are involved in the business-to-business marketing approach and portray the challenges that arise due to a number of factors, such as trust, customer value and early adoption, when it comes to selling new technology and innovative solutions, and innovations overall, that companies nowadays need, but not necessarily want. The Diffusion of Innovation theory as well as the concept of Relationship Management will be used to put this topic into theoretical frameworks. With the support of existing literature, the qualitative methodologies of this paper are chosen in order to gain knowledge of the preferred approaches of business-to-business marketing. In accordance to this, the authors aim to analyze the diffusion of innovation and how companies today can attain customers not only within the early adopters group, but also the early and later majority, thus increasing market value and share. This exact transition has been analyzed, however not in the exact field of industrial marketing with a focus on the financial industry, though innovation and digitalization is now more important than ever. 

    Firms need to establish personal and trustworthy relationships with potential and actual customers in order to generate more value and implement necessary innovative solutions. In a survey conducted within the scope of this thesis, respondents emphasize the perceived level of expertise suppliers need in order to initiate collaborations. The focus on innovation and increasing customer and market values through its implementation will be discussed in order to accelerate value generation for all parties involved in an ever-changing digital environment and to fill the research gap within innovation diffusion in industrial marketing. 

    Fulltekst (pdf)
    fulltext
  • 1776. Włodarczak, M.
    et al.
    Heldner, M.
    Edlund, Jens
    KTH, Skolan för datavetenskap och kommunikation (CSC), Tal, musik och hörsel, TMH.
    Communicative needs and respiratory constraints2015Inngår i: Proceedings of the Annual Conference of the International Speech Communication Association, INTERSPEECH, International Speech Communication Association, 2015, s. 3051-3055Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This study investigates timing of communicative behaviour with respect to speaker's respiratory cycle. The data is drawn from a corpus of multiparty conversations in Swedish. We find that while longer utterances (> 1 s) are tied, predictably, primarily to exhalation onset, shorter vocalisations are spread more uniformly across the respiratory cycle. In addition, nods, which are free from any respiratory constraints, are most frequently found around exhalation offsets, where respiratory requirements for even a short utterance are not satisfied. We interpret the results to reflect the economy principle in speech production, whereby respiratory effort, associated primarily with starting a new respiratory cycle, is minimised within the scope of speaker's communicative goals. Copyright

  • 1777. Xia, K.
    et al.
    Gao, L.
    Li, W.
    Wang, Lihui
    KTH, Skolan för industriell teknik och management (ITM), Industriell produktion.
    Chao, K. -M
    A Q-learning based selective disassembly planning service in the cloud based remanufacturing system for WEEE2014Inngår i: ASME 2014 International Manufacturing Science and Engineering Conference, MSEC 2014 Collocated with the JSME 2014 International Conference on Materials and Processing and the 42nd North American Manufacturing Research Conference, ASME Press, 2014Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Cloud based approach for remanufacturing is becoming a new technical solution for sustainable management of Waste Electrical and Electronic Equipment (WEEE). This paper presents a service-oriented framework of a Cloud Based Remanufacturing System (CBRS) for WEEE. In remanufacturing of WEEE, disassembly plays an important role. However, complete disassembly is rarely an ideal solution due to the high disassembly cost, with the increasing customization and diversity, and more complex assembly processes of Electrical and Electronic Equipment (EEE). Selective disassembly focusing on disassembling only a few selected components is a better choice. In this paper, a Q-Learning based Selective Disassembly Planning (QL-SDP) approach embedded with a multi-criteria decision making model is developed. The multi-criteria decision making model is built according to the legislative and economic considerations of specific stakeholders of WEEE. And the QLSDP approach is used to achieve optimized selective disassembly planning. An implementation example has been used to verify and demonstrate the effectiveness and robustness of the approach. The developed QL-SDP approach is designed as a service implemented in the presented CBRS for WEEE.

  • 1778.
    Xu, Cheng
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Medicinsk avbildning.
    A Segmented Silicon Strip Detector for Photon-Counting Spectral Computed Tomography2012Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    Spectral computed tomography with energy-resolving detectors has a potential to improve the detectability of images and correspondingly reduce the radiation dose to patients by extracting and properly using the energy information in the broad x-ray spectrum. A silicon photon-counting detector has been developed for spectral CT and it has successfully solved the problem of high photon flux in clinical CT applications by adopting the segmented detector structure and operating the detector in edge-on geometry. The detector was evaluated by both the simulation and measurements.

    The effects of energy loss and charge sharing on the energy response of this segmented silicon strip detector with different pixel sizes were investigated by Monte Carlo simulation and a comparison to pixelated CdTe detectors is presented. The validity of spherical approximations of initial charge cloud shape in silicon detectors was evaluated and a more accurate statistical model has been proposed.

    A photon-counting energy-resolving application specific integrated circuit (ASIC) developed for spectral CT was characterized extensively by electrical pulses, pulsed laser and real x-ray photons from both the synchrotron and an x-ray tube. It has been demonstrated that the ASIC performs as designed. A noise level of 1.09 keV RMS has been measured and a threshold dispersion of 0.89 keV RMS has been determined. The count rate performance of the ASIC in terms of count loss and energy resolution was evaluated by real x-rays and promising results have been obtained.

    The segmented silicon strip detector was evaluated using synchrotron radiation. An energy resolution of 16.1% has been determined with 22 keV photons in the lowest flux limit, which deteriorates to 21.5% at an input count rate of 100 Mcps mm−2. The fraction of charge shared events has been estimated and found to be 11.1% for 22 keV and 15.3% for 30 keV. A lower fraction of charge shared events and an improved energy resolution can be expected by applying a higher bias voltage to the detector.

    Fulltekst (pdf)
    PhD_thesis_ChengXu
  • 1779.
    Xu, Tianhua
    et al.
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Material- och nanofysik, Optik och Fotonik, OFO. Tianjin University, China.
    Li, J.
    Jacobsen, Gunnar
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Material- och nanofysik. Acreo Swedish.
    Popov, Sergei
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Material- och nanofysik, Optik och Fotonik, OFO.
    Djupsjöbacka, A.
    Schatz, Richard
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Material- och nanofysik.
    Zhang, Y.
    Bayvel, P.
    Field trial over 820 km installed SSMF and its potential Terabit/s superchannel application with up to 57.5-Gbaud DP-QPSK transmission2015Inngår i: Optics Communications, ISSN 0030-4018, E-ISSN 1873-0310, Vol. 353, s. 133-138, artikkel-id 20166Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In this paper, we report the result of a field trial of 56-Gbaud (224-Gbit/s) and 57.5-Gbaud (230-Gbit/s) dual-polarization quadrature phase shift keying (DP-QPSK) coherent optical transmission over 820 km installed standard single mode fiber (SSMF). Offline digital signal processing (DSP) was applied for signal recovery and bit-error-rate (BER) counting in our field trial experiments, and BER performance well below the 7% overhead hard-decision forward error correction (FEC) error-free threshold (4.5×10-3) at 231-1 pseudo random bit sequence (PRBS) pattern length has been achieved, with the best achievable BERs of 2×10-4 (56-Gbaud) and 3×10-4 (57.5-Gbaud), respectively. In parallel a 1.15-Tbit/s (5×230-Gbit/s) quasi-Nyquist spaced wavelength division multiplexing (WDM) superchannel transmission over the same 820 km optical field link (FL) was also investigated through numerical simulations based on the same 57.5-Gbaud DP-QPSK signal using 1% roll-off Nyquist pulse shaping with 60-GHz channel spacing, and the results indicate that the BER performance well below the 7% overhead hard-decision FEC error-free threshold (4.5×10-3) for the 1.15-Tbit/s DP-QPSK superchannel transmission can be achieved.

  • 1780.
    Xu, Yinan
    KTH, Skolan för elektroteknik och datavetenskap (EECS), Medieteknik och interaktionsdesign, MID.
    Exploring the benefits and challenges of AR in an outdoor tourism experience2018Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    With the development of resilient computer vision algorithms, mobile augmented reality (MAR) technology is now accessible for most smartphone users. There are a lot of MAR applications available on the App Store and Google Play. However, most of the applications are games for indoor usage. Outdoor MAR commercial applications are rare. Evidently, outdoor MAR in tourism is a promising and challenging field. This study focuses on Djurgården, an island in Stockholm. The purpose is to develop a MAR prototype for some underexplored places on the island and see the benefits and challenges of AR as a method for helping tourists in sightseeing. A MAR application was developed to explore the research question surrounding its benefits and challenges. a user study was conducted to compare the MAR prototype with general usage of smartphone applications, where both quantitative and qualitative data was gathered. The results indicate that MAR has an advantage in providing more immersive, content travelling experience as well as reducing feelings of boredom. However, MAR also has challenges in avoiding collision with real objects and limiting possible risks.

    Fulltekst (pdf)
    fulltext
  • 1781.
    Yacob, Filmon
    et al.
    KTH, Skolan för industriell teknik och management (ITM), Industriell produktion.
    Semere, Daniel
    KTH, Skolan för industriell teknik och management (ITM), Industriell produktion.
    Nordgren, Erik
    LEAX AB, Falun.
    Octree-Based Generation and Variation Analysis of Skin Model Shapes2018Inngår i: Journal of Manufacturing and Material Processing, ISSN 2504-4494, Vol. (3), nr 52Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The concept of Skin Model Shape has been introduced as a method for a close representation of manufactured parts using a discrete geometry representation scheme. However, discretized surfaces make irregular polyhedra, which are computationally demanding to model and process using the traditional implicit surface and boundary representation techniques. Moreover, there are still some research challenges related to the geometrical variation modelling of manufactured products; specifically, methods for geometrical data processing, the mapping of manufacturing variation sources to a geometric model, and the improvement of variation visualization techniques. To provide steps towards addressing these challenges this work uses Octree, a 3D space partitioning technique, as an aid for geometrical data processing, variation visualization, variation modelling and propagation, and tolerance analysis. Further, Skin Model Shapes are generated either by manufacturing a simulation using a non-ideal toolpath on solid models of Skin Model Shapes that are assembled to non-ideal fixtures or from measurement data. Octrees are then used in a variation envelope extraction from the simulated or measurement data, which becomes a basis for further simulation and tolerance analysis. To illustrate the method, an industrial two-stage truck component manufacturing line was studied. Simulation results show that the predicted Skin Model Shapes closely match to the measurement data from the manufacturing line, which could also be used to map to manufacturing error sources. This approach contributes towards the application of Octrees in many Skin Model Shape related operations and processes.

  • 1782. Yamamori, A.
    et al.
    Hagward, Anders Mikael
    KTH, Skolan för datavetenskap och kommunikation (CSC). Tokyo Institute of Technology, Japan.
    Kobayashi, T.
    Can Developers' Interaction Data Improve Change Recommendation?2017Inngår i: 2017 IEEE 41st Annual Computer Software and Applications Conference (COMPSAC), IEEE Computer Society, 2017, s. 128-137, artikkel-id 8029600Konferansepaper (Fagfellevurdert)
    Abstract [en]

    One of the most common causes of bugs is overlooking changes. To prevent bugs and improve the quality of the products, numerous studies have been undertaken on change guides based on logical couplings extracted from developers' past process histories, such as change history. While valuable change rules based on logical couplings can be gleaned found from the change history, these rules often fail to find appropriate candidates because the change histories in repositories only preserve a summary of changes between commits. We recently analyzed the interaction data produced by a developer in an integrated development environment. Such interaction data contains not only a detailed change history but also reference activities between commits. In this paper, we investigate whether logical couplings extracted from interaction data could improve change recommendation performance. We used the interaction data from actual open source development, not from the project only for this study. Experimental results obtained using the interaction data from actual open source development showed a significant improvement in the efficiency of the change recommendation process. The results also indicated improvement in the number of detected artifacts that the developer had forgot to change.

  • 1783.
    Yang, Fangkai
    et al.
    KTH, Skolan för elektroteknik och datavetenskap (EECS), Beräkningsvetenskap och beräkningsteknik (CST).
    Qureshi, A.
    Shabo, Jack
    KTH.
    Peters, Christopher
    KTH, Skolan för elektroteknik och datavetenskap (EECS), Beräkningsvetenskap och beräkningsteknik (CST).
    Do you see groups?: The impact of crowd density and viewpoint on the perception of groups2018Inngår i: Proceedings of the 18th International Conference on Intelligent Virtual Agents, IVA 2018, Association for Computing Machinery (ACM), 2018, s. 313-318Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Agent-based crowd simulation in virtual environments is of great utility in a variety of domains, from the entertainment industry to serious applications including mobile robots and swarms. Many studies of crowd behavior simulations do not consider the fact that people tend to congregate in smaller social gatherings, such as friends, or families, rather than walking alone. Based on a real-time crowd simulator which has been implemented as a unilateral incompressible fluid and augmented with group behaviors, a perceptual study was conducted to determine the impact of groups on the perception of the crowds at various densities from different camera views. If it is not possible to see groups under certain circumstances, then it may not be necessary to simulate them, to reduce the amount of calculations, an important issue in real-time simulations. This study provides researchers with a proper reference to design better algorithms to simulate realistic behaviors.

  • 1784.
    Yang, Guanda
    et al.
    Friedrich Alexander Univ Erlangen Nuremberg, Inst Polymer Mat, Martensstr 7, D-91058 Erlangen, Germany.
    Nilsson, Fritjof
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Fiber- och polymerteknologi.
    Schubert, Dirk W.
    A Study of Finite Size Effects and Periodic Boundary Conditions to Simulations of a Novel Theoretical Self-Consistent Mean-Field Approach2019Inngår i: Macromolecular Theory and Simulations, ISSN 1022-1344, E-ISSN 1521-3919, artikkel-id 1900023Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In a previous work, a very promising mathematical model for predicting the electrical conductivity below the electrical percolation threshold, for both isotropic and anisotropic composites, was published by Schubert. In this work, periodic boundary condition of the simulation is utilized. The results are also compared to the previous work and other theoretical models. The truncated fibers due to finite size of the simulation volume are considered as two individual pieces so that the real aspect ratios will also be taken into consideration. A comparison is made between two groups, in which the length and the radius of the carbon fibers are changed, respectively, under certain aspect ratios. With three different sizes of the simulation volumes, the influence on the results due to the finite size effect is calculated.

  • 1785.
    Yang, Liyun
    et al.
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Medicinteknik och hälsosystem, Ergonomi.
    Lu, Ke
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Medicinteknik och hälsosystem, Ergonomi.
    Diaz-Olivares, Jose A.
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Medicinteknik och hälsosystem, Ergonomi.
    Seoane, Fernando
    Univ Boras, Swedish Sch Text, S-50190 Boras, Sweden.;Karolinska Inst, Inst Clin Sci Intervent & Technol, S-14157 Huddinge, Sweden.;Karolinska Univ Hosp, Dept Biomed Engn, S-14157 Huddinge, Sweden..
    Lindecrantz, Kaj
    Karolinska Inst, Inst Environm Med, S-17177 Stockholm, Sweden.;Univ Boras, Swedish Sch Text, S-50190 Boras, Sweden..
    Forsman, Mikael
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Medicinteknik och hälsosystem, Ergonomi. nstitute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.
    Abtahi, Farhad
    Karolinska Inst, Inst Environm Med, S-17177 Stockholm, Sweden..
    Eklund, Jörgen A. E.
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Medicinteknik och hälsosystem, Ergonomi.
    Towards Smart Work Clothing for Automatic Risk Assessment of Physical Workload2018Inngår i: IEEE Access, E-ISSN 2169-3536, Vol. 6, s. 40059-40072Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Work-related musculoskeletal and cardiovascular disorders are still prevalent in today's working population. Nowadays, risk assessments are usually performed via self-reports or observations, which have relatively low reliability. Technology developments in textile electrodes (textrodes), inertial measurement units, and the communication and processing capabilities of smart phones/tablets provide wearable solutions that enable continuous measurements of physiological and musculoskeletal loads at work with sufficient reliability and resource efficiency. In this paper, a wearable system integrating textrodes, motion sensors, and real-time data processing through a mobile application was developed as a demonstrator of risk assessment related to different types and levels of workload and activities. The system was demonstrated in eight subjects from four occupations with various workload intensities, during which the heart rate and leg motion data were collected and analyzed with real-time risk assessment and feedback. The system showed good functionality and usability as a risk assessment tool. The results contribute to designing and developing future wearable systems and bring new solutions for the prevention of work-related disorders.

  • 1786.
    Yang, Wentao
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Transportplanering.
    Simulation-based evaluation of a new floating vehicle speeding detection method2019Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Driving too fast is one of the major causes that lead to road crashes. A new speed enforcement management method based on autonomous vehicle technologies has the potential to enhance the speed limit compliance and improve traffic safety. This paper investigates the performance of this method in the detection stage under different scenarios. 27 scenarios are generated using microscopic simulation in VISSIM to collect performance data of this method. Analysis of variance (ANOVA) is used to examine the performance difference between scenarios, including the detectable distance, the number of lanes, the speed of the measuring vehicle, the flow of the traffic, the desired average speed of the traffic, and the desired speed variance of the traffic. As a result, the influences of the factors on the performance of the method are distinguished. The detectable distance, the speed of the measuring vehicle and the flow of traffic have non-linear effects on the number of detected speeding vehicles. The measuring vehicle can interact with more speeding vehicles when the average speed of the traffic is high and the speed variance is small.

    Fulltekst (pdf)
    fulltext
  • 1787. Yang, Zhenzhou
    et al.
    Zhang, Yingyi
    Liu, Lili
    Seetharaman, Seshadri
    KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap.
    Wang, Xidong
    Zhang, Zuotai
    Integrated Utilization of Sewage Sludge and Coal Gangue for Cement Clinker Products: Promoting Tricalcium Silicate Formation and Trace Elements Immobilization2016Inngår i: Materials, ISSN 1996-1944, E-ISSN 1996-1944, Vol. 9, nr 4, artikkel-id 275Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The present study firstly proposed a method of integrated utilization of sewage sludge (SS) and coal gangue (CG), two waste products, for cement clinker products with the aim of heat recovery and environment protection. The results demonstrated that the incremental amounts of SS and CG addition was favorable for the formation of tricalcium silicate (C3S) during the calcinations, but excess amount of SS addition could cause the impediment effect on C3S formation. Furthermore, it was also observed that the C3S polymorphs showed the transition from rhombohedral to monoclinic structure as SS addition was increased to 15 wt %. During the calcinations, most of trace elements could be immobilized especially Zn and cannot be easily leached out. Given the encouraging results in the present study, the co-process of sewage sludge and coal gangue in the cement kiln can be expected with a higher quality of cement products and minimum pollution to the environment.

  • 1788.
    Yao, Bitao
    et al.
    KTH, Skolan för industriell teknik och management (ITM), Industriell produktion. Wuhan University of Technology, China.
    Zhou, Z.
    Wang, Lihui
    KTH, Skolan för industriell teknik och management (ITM), Industriell produktion.
    Xu, W.
    Liu, Q.
    Liu, A.
    Sensorless and adaptive admittance control of industrial robot in physical human−robot interaction2018Inngår i: Robotics and Computer-Integrated Manufacturing, ISSN 0736-5845, E-ISSN 1879-2537, Vol. 51, s. 158-168Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    As industrial robots are applied in manufacturing industry on a large-scale and human intelligence is regarded as an important part in manufacturing, physical human−robot interaction (pHRI) which integrates the strength and accuracy of robot with human operator's ability of task cognition has drawn the attention of both academia and industry. However, an industrial robot without extra force/torque sensor for interacting force monitoring cannot be used directly in pHRI, and research on pHRI of industrial robots remains a challenge. In this research, a comprehensive dynamic model of an industrial robot in both dynamic mode and quasi-static mode is obtained to calculate the external force produced by human operator in pHRI and enables sensorless pHRI for industrial robots even in the environment with ambient vibration. Particularly, the dynamics in the process of mode switching which has not been investigated by researchers is studied and compensated by an empirical but effective method. Admittance control is used to transfer the detected force into reference position and velocity of the robot. RBF (Radial Basis Function) network is used to update the damping parameter online in order to reduce the contact force change and the contact force which makes pHRI more natural and easier. The stability of the controller is also discussed. The proposed methods of external force detection and adaptive admittance control show satisfactory behaviour in the experiments.

  • 1789. Yasuga, H.
    et al.
    Guo, Weijin
    KTH.
    Hansson, Jonas
    KTH.
    Haraldsson, Tommy
    KTH.
    Miki, N.
    van der Wijngaart, Wouter
    KTH.
    Droplet microfluidics inside paper2018Inngår i: 2018 IEEE Micro Electro Mechanical Systems (MEMS), Institute of Electrical and Electronics Engineers (IEEE), 2018, s. 269-271Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Here, we demonstrate, for the first time: the self-digitization, i.e. spontaneous formation, of microdroplets during the imbibition of paper; the on-demand merging of individual microdroplets in paper; and the on-demand ejection of individual microdroplets from the paper. Two technical novelties underlie these novel functions: the formation of free-standing synthetic microfluidic paper, i.e. a porous matrix of slanted and interconnected micropillars without bottom layer; and the hydrophobic surface modification of the paper. The ease of manipulation and the direct access to the microdroplets from the environment makes this an extremely versatile tool, with potential applications in liquid sample digitisation and microparticle generation.

    Fulltekst (pdf)
    fulltext
  • 1790.
    Yberg, Viktor
    KTH, Skolan för elektroteknik och datavetenskap (EECS).
    Native-like Performance and User Experience with Progressive Web Apps2018Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Users spend more time than ever on mobile devices like smartphones and tablets, while native app development continues to become harder due to platform fragmentation. The web is a promising platform for mobile applications because of its easy access and standardised technologies that work unanimously across many different platforms and operating systems. However, native applications have always had an edge over the web because of important features that have not been available anywhere else, such as push notifications, background synchronisation and offline support. Progressive Web Apps aim to bring the web platform closer to native by enabling many of these important features while still running completely in the web browser, with the possibility to install the application, effectively promoting it to a top-level application.

    This project will evaluate the capabilities of web-based mobile applications compared to traditional native mobile applications. Three simple proof of concept applications will be built to test the performance and user experience with the help of different JavaScript libraries and techniques for building a Progressive Web App. Then one of the implementations will be further developed and matched against an existing native application with similar features in terms of functionality and performance.

    The study finds that for this use case, a Progressive Web App may be used instead of a native app without missing out on any important functionality. This simplifies development and releases, by enabling rich code sharing between the different platforms as well as avoiding the app distribution platforms by distributing the application entirely through the web, automatic and transparent to the users. However, this solution means more responsibility in terms of infrastructure for developers to maintain and optimise as the application needs to be distributed by own servers.

    Fulltekst (pdf)
    fulltext
  • 1791. Yildiz, Hasan
    et al.
    Forsberg, Rene
    Ågren, Jonas
    Tscherning, J
    Sjöberg, Lars E.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Samhällsplanering och miljö, Geodesi och satellitpositionering.
    Comparison of remove-compute-restore and least squares modification of Stokes' formula techniques to quasi-geoid determination over the Auvergne test area2012Inngår i: Journal of Geodetic Science, ISSN 2081-9919, E-ISSN 2081-9943, Vol. 2, nr 1, s. 53-64Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The remove-compute-restore (RCR) technique for regional geoid determination implies that both topography and low-degree global geopotential model signals are removed before computation and restored after Stokes' integration or Least Squares Collocation (LSC) solution. The Least Squares Modification of Stokes' Formula (LSMS) technique not requiring gravity reductions is implemented here with a Residual Terrain Modelling based interpolation of gravity data. The 2-D Spherical Fast Fourier Transform (FFT) and the LSC methods applying the RCR technique and the LSMS method are tested over the Auvergne test area. All methods showed a reasonable agreement with GPS-levelling data, in the order of a 3-3.5 cm in the central region having relatively smooth topography, which is consistent with the accuracies of GPS and levelling. When a 1-parameter fit is used, the FFT method using kernel modification performs best with 3.0 cm r.m.s difference with GPS-levelling while the LSMS method gives the best agreement with GPS-levelling with 2.4 cm r.m.s after a 4-parameter fit is used. However, the quasi-geoid models derived using two techniques differed from each other up to 33 cm in the high mountains near the Alps. Comparison of quasi-geoid models with EGM2008 showed that the LSMS method agreed best in term of r.m.s.

  • 1792.
    Ying, Fei
    KTH, Skolan för industriell teknik och management (ITM), Industriell ekonomi och organisation (Inst.), Industriell marknadsföring.
    Approaches to Expand in Aftermarket through Marketing Adaptions in the Chinese Market: A study of Hardox Wearparts in China2014Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    In today’s competitive market in China, it is of importance to focus on differentiation by using intangible assets where marketing is significant. By adapting the marketing strategy through studying the marketing mix that can better adapt to the Chinese market and culture, companies can obtain a competitive advantage.

    The aim of the thesis is to study the current problems, needs and opportunities for SSAB’s business unit Hardox Wearparts to adapt their marketing strategies to better meet their customers’ values in order to boost sales in the aftermarket. Finally, which marketing actions are needed is developed through a marketing plan.

    In order to identify problems, needs and opportunities, the thesis focuses on understanding the customers, Hardox Wearparts centers, the marketing and sales unit at Hardox Wearparts and SSAB, and finally by studying environmental and cultural differences together with literature and potential best practices through benchmarking.

    The outcome of the thesis is an action plan, illustrating tactics and strategies for building brand strength, trust and expanding the network and transparency in order to expand in the Chinese market.

    Download (pdf)
    MasterThesis_FeiYing
  • 1793. Ying, Z.
    et al.
    Zhao, Kun
    KTH, Skolan för elektro- och systemteknik (EES), Elektroteknisk teori och konstruktion. Network Technology, Sweden .
    Bolin, T.
    Helander, J.
    Sjöberg, D.
    He, Sailing
    KTH, Skolan för elektro- och systemteknik (EES), Elektroteknisk teori och konstruktion.
    Scannavini, A.
    Foged, L. J.
    Nicolas, G.
    Study of phased array in UE for 5G mm wave communication system with consideration of user body effect2016Inngår i: 2016 10th European Conference on Antennas and Propagation, EuCAP 2016, Institute of Electrical and Electronics Engineers (IEEE), 2016, artikkel-id 7481215Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The latest study of the millimeter wave (mmWave) phased array in user device (UE) for 5G communication is presented in this paper. Particularly, the body effect on the phased array in a UE/mobile terminal at 15 GHz is investigated with the 3D measured data. Its impact on the recently introduced parameter for phased array in mobile terminal, the total scanning pattern, body loss and the coverage efficiency, is analyzed.

  • 1794. Yoshioka, S.
    et al.
    Fransson, Jens H. M.
    KTH, Tidigare Institutioner, Mekanik.
    Alfredsson, P. H.
    Evolution of disturbances in boundary layers with wall suction2003Konferansepaper (Fagfellevurdert)
  • 1795.
    Yu, Caroline
    et al.
    KTH, Skolan för elektroteknik och datavetenskap (EECS).
    Zhang, Ann-Mia
    KTH, Skolan för elektroteknik och datavetenskap (EECS).
    The different viewing experiences between special and visual effects2019Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    Computer graphics field is rapidly growing and is widely used in many industries, especially in cinematics. The visual effects, which is a part of the field, have become more affordable in comparison to special effect. By using more visual effects, safety during the shooting increases and the use of resources decreases. However, the field is still young and there are a lot of flaws to consider when creating such an effect. It is important that CGI in movies are created in such a way that it does not disrupt the viewing experience unless it’s done on purpose. Therefore, CGI in a real-life setting should look real. To create CGI that is closer to reality, this study examines the differences between special effects and visual effects in the aspect of the viewing experience.

    To investigate this question, we conducted an experiment following a semi-structured interview. 13 students participated in this study where they had to watch video clips representing the special respective visual effect. During the experiment, they did a self- report by filling in a questionnaire. A Valence-Arousal model was used to examine the subject’s emotional reactions.

    The result suggests that there are no significant differences between the two effects in regard to an emotional reaction. However, it shows that the visual effect had flaws of being too plastic and too perfect which makes it less convincing compared to the special effects. In contrary, the special effects do not have the ability to be exaggerating, which in turn makes it more exciting to watch the visual effects. Although this study does not solve any flaws, it highlights those that need to be fixed for the goals of improving CGI.

    Fulltekst (pdf)
    fulltext
  • 1796.
    Yu, ChaoQing
    et al.
    Tsinghua Univ, Dept Earth Syst Sci, Minist Educ, Key Lab Earth Syst Modeling, Beijing, Peoples R China.;Cross Strait Tsinghua Res Inst, AI Earth Lab, Xiamen, Peoples R China..
    Huang, Xiao
    Tsinghua Univ, Dept Earth Syst Sci, Minist Educ, Key Lab Earth Syst Modeling, Beijing, Peoples R China.;Norwegian Inst Bioecon Res, Saerheim, Norway..
    Chen, Han
    Tsinghua Univ, Dept Earth Syst Sci, Minist Educ, Key Lab Earth Syst Modeling, Beijing, Peoples R China..
    Godfray, H. Charles J.
    Univ Oxford, Dept Zool, Oxford, England.;Univ Oxford, Oxford Martin Sch, Oxford, England..
    Wright, Jonathon S.
    Tsinghua Univ, Dept Earth Syst Sci, Minist Educ, Key Lab Earth Syst Modeling, Beijing, Peoples R China..
    Hall, Jim W.
    Univ Oxford, Environm Change Inst, Oxford, England..
    Gong, Peng
    Tsinghua Univ, Dept Earth Syst Sci, Minist Educ, Key Lab Earth Syst Modeling, Beijing, Peoples R China.;Cross Strait Tsinghua Res Inst, AI Earth Lab, Xiamen, Peoples R China..
    Ni, ShaoQiang
    Tsinghua Univ, Dept Earth Syst Sci, Minist Educ, Key Lab Earth Syst Modeling, Beijing, Peoples R China..
    Qiao, ShengChao
    Tsinghua Univ, Dept Earth Syst Sci, Minist Educ, Key Lab Earth Syst Modeling, Beijing, Peoples R China..
    Huang, GuoRui
    Tsinghua Univ, Dept Earth Syst Sci, Minist Educ, Key Lab Earth Syst Modeling, Beijing, Peoples R China..
    Xiao, YuChen
    Tsinghua Univ, Dept Earth Syst Sci, Minist Educ, Key Lab Earth Syst Modeling, Beijing, Peoples R China..
    Zhang, Jie
    Tsinghua Univ, Dept Earth Syst Sci, Minist Educ, Key Lab Earth Syst Modeling, Beijing, Peoples R China..
    Feng, Zhao
    Tsinghua Univ, Dept Earth Syst Sci, Minist Educ, Key Lab Earth Syst Modeling, Beijing, Peoples R China..
    Ju, XiaoTang
    China Agr Univ, Coll Resources & Environm Sci, Beijing, Peoples R China..
    Ciais, Philippe
    LSCE, Gif Sur Yvette, France..
    Stenseth, Nils Chr.
    Tsinghua Univ, Dept Earth Syst Sci, Minist Educ, Key Lab Earth Syst Modeling, Beijing, Peoples R China.;Univ Oslo, CEES, Oslo, Norway..
    Hessen, Dag O.
    Univ Oslo, Sect Aquat Biol & Toxicol AQUA, Oslo, Norway..
    Sun, ZhanLi
    Leibniz Inst Agr Dev Transit Econ IAMO, Halle, Saale, Germany..
    Yu, Le
    Tsinghua Univ, Dept Earth Syst Sci, Minist Educ, Key Lab Earth Syst Modeling, Beijing, Peoples R China..
    Cai, WenJia
    Tsinghua Univ, Dept Earth Syst Sci, Minist Educ, Key Lab Earth Syst Modeling, Beijing, Peoples R China..
    Fu, HaoHuan
    Tsinghua Univ, Dept Earth Syst Sci, Minist Educ, Key Lab Earth Syst Modeling, Beijing, Peoples R China..
    Huang, XiaoMeng
    Tsinghua Univ, Dept Earth Syst Sci, Minist Educ, Key Lab Earth Syst Modeling, Beijing, Peoples R China..
    Zhang, Chi
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH).
    Liu, HongBin
    Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing, Peoples R China..
    Taylor, James
    Newcastle Univ, Sch Nat & Environm Sci, Newcastle, England..
    Managing nitrogen to restore water quality in China2019Inngår i: Nature, ISSN 0028-0836, E-ISSN 1476-4687, Vol. 567, nr 7749, s. 516-520Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The nitrogen cycle has been radically changed by human activities(1). China consumes nearly one third of the world's nitrogen fertilizers. The excessive application of fertilizers(2,3) and increased nitrogen discharge from livestock, domestic and industrial sources have resulted in pervasive water pollution. Quantifying a nitrogen 'boundary'(4) in heterogeneous environments is important for the effective management of local water quality. Here we use a combination of water-quality observations and simulated nitrogen discharge from agricultural and other sources to estimate spatial patterns of nitrogen discharge into water bodies across China from 1955 to 2014. We find that the critical surface-water quality standard (1.0 milligrams of nitrogen per litre) was being exceeded in most provinces by the mid-1980s, and that current rates of anthropogenic nitrogen discharge (14.5 +/- 3.1 megatonnes of nitrogen per year) to fresh water are about 2.7 times the estimated 'safe' nitrogen discharge threshold (5.2 +/- 0.7 megatonnes of nitrogen per year). Current efforts to reduce pollution through wastewater treatment and by improving cropland nitrogen management can partially remedy this situation. Domestic wastewater treatment has helped to reduce net discharge by 0.7 +/- 0.1 megatonnes in 2014, but at high monetary and energy costs. Improved cropland nitrogen management could remove another 2.3 +/- 0.3 megatonnes of nitrogen per year-about 25 per cent of the excess discharge to fresh water. Successfully restoring a clean water environment in China will further require transformational changes to boost the national nutrient recycling rate from its current average of 36 per cent to about 87 per cent, which is a level typical of traditional Chinese agriculture. Although ambitious, such a high level of nitrogen recycling is technologically achievable at an estimated capital cost of approximately 100 billion US dollars and operating costs of 18-29 billion US dollars per year, and could provide co-benefits such as recycled wastewater for crop irrigation and improved environmental quality and ecosystem services.

  • 1797.
    Yu, Shun
    et al.
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Materialfysik, Materialfysik, MF.
    Ahmadi, Sareh
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Materialfysik, Materialfysik, MF.
    Sun, Chenghua
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Materialfysik, Materialfysik, MF.
    Schulte, Karina
    Pietzsch, Annette
    Hennies, Franz
    Zuleta, Marcelo
    Göthelid, Mats
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Materialfysik, Materialfysik, MF.
    Crystallization-Induced Charge-Transfer Change in TiOPc Thin Films Revealed by Resonant Photoemission Spectroscopy2011Inngår i: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 115, nr 30, s. 14969-14977Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Organic semiconductors usually demonstrate crystal structure dependent electronic properties, and through precise control of film structure, the performance of novel organic electronic devices can be greatly improved. Understanding the crystal structure dependent charge-transfer mechanism thus becomes critical. In this work, we have prepared amorphous titanyl phthalocyanine films by vacuum molecular beam evaporation and have further crystallized them through vacuum annealing. In the crystalline phase, an excited electron is rapidly transferred into neighboring molecules; while in the amorphous phase, it is mainly localized and recombines with the core hole as revealed by resonant photoemission spectroscopy (RPES). The fast electron transfer time is determined to be around 16 fs in the crystalline film, which is in good agreement with the charge-transfer hopping time estimated from the best device performance reported. The crystallized film shows more p-type characteristics than the amorphous with all the energy levels shifting toward the vacuum level. However, the greatly improved charge transfer is assigned to the molecular orbital coupling rather than this shift. From density functional theory and RPES, we specify the contribution of two differently coordinated nitrogen atoms (N2c and N3c) to the experimental results and illustrate that the N3c related orbital has experienced a dramatic change, which is keenly related to the improved charge transfer.

  • 1798.
    Yu, Zhangwei
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    interview: "Optofluidics are an interesting emerging research field combining microfluidics with optics on the micrometre scale'2016Inngår i: Electronics Letters, ISSN 0013-5194, E-ISSN 1350-911X, Vol. 52, nr 19, s. 1576-1576Artikkel i tidsskrift (Fagfellevurdert)
  • 1799. Yuan, Q.
    et al.
    Lembono, T. S.
    Chen, I. -M
    Landén, Simon Nelson
    KTH, Skolan för industriell teknik och management (ITM).
    Malmgren, Victor
    KTH, Skolan för industriell teknik och management (ITM).
    Automatic robot taping with force feedback2017Inngår i: 2017 IEEE International Conference on Robotics and Automation (ICRA), Institute of Electrical and Electronics Engineers (IEEE), 2017, s. 1821-1826, artikkel-id 7989215Konferansepaper (Fagfellevurdert)
    Abstract [en]

    In surface treatment processes like plasma spraying and spray painting of workpieces, protecting the uninvolved surface by applying masking tape is a common process. Due to the operation complexity for different geometries, such taping tasks depend on a lot of manual works, which is tedious and tiring. This paper introduces an automatic agile robotic system and the corresponding algorithm to do the surface taping. The automatic taping system consists of a 3D scanner for workpiece 3D model reconstruction, a taping end-effector which is mounted on a robot manipulator to handle the taping task, and a rotating platform that is used to hold the workpiece. The surface covering method and the taping path planning algorithms using the scanned model are introduced. With the implementation of the compliance mechanism, the force feedback and the tape cutting mechanism, the system is able to tape flat, cylindrical, freeform, and grooved surfaces. Experiments conducted on taping an engine inner liner shows that the surface can be covered with uniform taping overlap and very little wrinkle. The proposed system is a useful taping package for industrial applications such as workpiece repairing and surface protection, where surface treatments are involved.

  • 1800.
    Yudhanira, Ela
    KTH, Skolan för elektroteknik och datavetenskap (EECS), Medieteknik och interaktionsdesign, MID.
    Optimize the user experience of Linked Data visualization2018Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    The use of Linked Data to model and visualize complex information entails usability challenges and opportunities to improve the user experience. This study seeks to enhance the user experience of a product information tool which is developed with Linked Data approach. The research was carried out in an industrial setting and follows the case study paradigm. It consists of 1) user research and literature review to define design requirements, 2) prototyping, and 3) usability testing. The user research produced a list of user experience issues which were in turn translated into design requirements by reflecting on related research and following the user's needs and goals. The design requirements formed the design elements which are embedded into the development of low- and high-fidelity prototypes. Next, usability evaluation of the final high-fidelity prototype examined the extent to which the design decisions could optimize the Linked Data visualization. The results show that several design decisions, such as adding interaction dynamics and the use of rich color representation, could indeed improve it. Also, in terms of general information and visual notation, the shift from UML diagram to node-links diagram received positive feedback from the users. But both node-links diagram and UML diagram received similar scores for the effectiveness and efficiency.

    Fulltekst (pdf)
    fulltext
333435363738 1751 - 1800 of 1857
RefereraExporteraLink til resultatlisten
Permanent link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf