Recent additions

  • Exploring benefits of using blending splines as transition curves 

    Brustad, Tanita Fossli; Dalmo, Rune (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-19)
    Track geometry is a fundamental subject in railway construction. With the demand for increased capacity in terms of load and speed, the need for suitable transitions between consecutive track sections is highly relevant. Properly constructed transition curves lead to improved travel comfort, increased safety, and reduced wear. The well known clothoid curve is widely used as a transition curve; ...
  • Design of an expandable junk catcher 

    Olsen, Kim A. (Master thesis; Mastergradsoppgave, 2017-06-15)
    "This report describes phase I of the project ""Design of an expandable junk catcher"", which is carried out on behalf of Qinterra Technologies, Department of Plugs & Packers in Narvik, as a part of the subject SHO6263 Diploma thesis M-ID. The main purpose of the project is to develop a new type of well intervention equipment to solve the problem of unwanted residue from debris on temporary installed ...
  • A study on hybrid sensor technology in winter road assessment 

    Pedersen, Aleksander; Brustad, Tanita Fossli (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-03-23)
    Road conditions during the winter months in Nordic countries can be highly unstable. Slippery roads combined with heavy haul traffic and ordinary road users can create dangerous, even lethal, situations if road maintenance is unsuccessful. Accidents and critical road conditions may lead to blocked roads, putting strain on a limited number of main roads in many regions, and may in the worst case ...
  • Hardy-type inequalities over balls in R^N for some bilinear and iterated operators 

    Jain, Pankaj; Kanjilal, Saikat; Persson, Lars Erik (Journal article; Tidsskriftartikkel; Peer reviewed, 2019)
    Some new multidimensional Hardy-type inequalites are proved and discussed. The cases with bilinear and iterated operators are considered and some equivalence theorems are proved.
  • Preliminary studies on transition curve geometry: Reality and virtual reality 

    Brustad, Tanita Fossli (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-02-01)
    The topic of transition curves is well known in track and road engineering. Over the years the need for easement between straight and curved sections in railway and road design has grown, with an important reason being increase in vehicle speed. Testing of transitions is often done with graph analysis where the property of lateral change of acceleration is compared between varieties of curves. ...
  • Railway transition curves: A review of the state-of-the-art and future research 

    Brustad, Tanita Fossli; Dalmo, Rune (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-05-18)
    Transition curves are a useful tool for lateral alignment of railway segments. Their design is important to ensure safe and comfortable travel for passengers and cargo. Well designed transition curves can lead to reduced wear of tracks and vehicles, which is beneficial from a maintenance point of view. Extensive studies have been performed through decades to find transition curves that can replace ...

    Oguntuase, J. A.; Fabelurin, Olanrewaju O; Persson, Lars Erik; Adeleke, EO (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-02-11)
    We obtain some further refinements of Hardy-type inequalities via superqudraticity technique. Our results both unify and further generalize several results on refinements of Hardy-type inequalities in the literature.
  • Some inequalities related to strong convergence of Riesz logarithmic means 

    Lukkassen, Dag; Persson, Lars Erik; Tephnadze, George; Tutberidze, Giorgi (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-03-23)
    In this paper we derive a new strong convergence theorem of Riesz logarithmic means of the one-dimensional Vilenkin–Fourier (Walsh–Fourier) series. The corresponding inequality is pointed out and it is also proved that the inequality is in a sense sharp, at least for the case with Walsh–Fourier series.
  • Some new Fourier inequalities for unbounded orthogonal systems in Lorentz-Zygmund spaces 

    Akishev, Gabdolla; Lukkassen, Dag; Persson, Lars Erik (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-03-20)
    In this paper we prove some essential complements of the paper (J. Inequal. Appl. 2019:171, 2019) on the same theme. We prove some new Fourier inequalities in the case of the Lorentz–Zygmund function spaces L q,r (logL ) α Lq,r(log⁡L)α involved and in the case with an unbounded orthonormal system. More exactly, in this paper we prove and discuss some new Fourier inequalities of this type for ...
  • Optimized cardiac simulation as a tool to understand patient specific mechanical function 

    Odeigah, Oscar Ofordile (Master thesis; Mastergradsoppgave, 2019-06-28)
    The muscular tissue of the heart is able to contract in the absence of external load. This behaviour is stimulated by a spontaneous electrical depolarization of cardiac cells in the sinoatrial node, which spreads electrical activation through the whole heart, that triggers the synchronized mechanical contraction of the heart muscle. This phenomenon, referred to as active contraction is commonly ...
  • Wind turbine and ice breaking 

    Nilsen, Peter Tor Furseth (Master thesis; Mastergradsoppgave, 2019-06-28)
    The arctic climate imposes the challenge of ice accretion on the blades of the wind turbine created by the atmospheric ice. Over time, the ice build-up causes ice shedding which can do structural damage to the wind turbine. The process involving ice breaking and shedding is not well understood. This document explains the mechanical properties of ice such as density, coefficient of thermal expansion, ...
  • Elevator model. Design of an elevator model for teaching in the field of automation 

    Nijdam, Eeke Maria (Master thesis; Mastergradsoppgave, 2019-06-28)
    For the master of Engineering Design at UiT, the arctic university of Norway, campus Narvik, a master assignment is being executed as a conclusion to the study. In this case the department of industrial automation education had an elevator model design assignment that could be done by an Engineering Design student. This report describes a summary of the design process that has been executed and the ...
  • Working Chair for Physically Disabled Children 

    Larsson, Ludvig (Master thesis; Mastergradsoppgave, 2019-06-28)
    A product development process was initiated with the purpose of designing a saddle seat working chair for physically disabled children on behalf of Fysionord AB. An objectives tree diagram was made using Sub-functions in existing solutions were listed, leading to the discovery of four modules, constituting the working chair: footrest, seat, backrest and undercarriage with wheels. The ...
  • Detecting attacks on servers using machine learning models 

    Lindbäck, Hans Victor Andersson (Master thesis; Mastergradsoppgave, 2019-06-28)
    With today's storage of information moving from paper to physical hard drives and the cloud, safety of these new information platforms are of great importance. Today an average server suffers several instances of abuse weekly, or even daily. The purpose of this project is to design a system for detecting abusive data traffic coming to or from a server by using machine learning algorithms. Also of ...
  • Automatic verification of UI tests 

    Hagerup, Christopher Kragebøl (Master thesis; Mastergradsoppgave, 2019-06-28)
    The purpose of this thesis is to investigate whether or not it is possible to perform automatic verification of UI Tests using Neural Networks. The problem being looked at is variance tied to the operating system, graphics card, or other hardware. This can cause false positives during UI testing, and thus we wanted to find a solution that could learn to ignore this, while still verifying the result. ...
  • Design Proposal for a Software Tool for Speech Therapy. Modern Application Structure of Visual Speech Therapy App for Children 

    Salwerowicz, Daniel Aaron (Master thesis; Mastergradsoppgave, 2019-06-28)
    This thesis describes results of study into development of a Visual Speech Therapy tool for therapy of speech impediments. It describes what Visual Speech Therapy tools are, their benefits, and what tools are available on the market. Main focus being therapy for children and teenagers with dysarthria, hearing problems, and functional speech impediments. After introducing the therapy tools it presents ...
  • Recent trends in operation modal analysis techniques and its application on a steel truss bridge 

    Singh, Harpal; Grip, Niklas (Journal article; Tidsskriftartikkel; Peer reviewed, 2019)
    Aging of infrastructure causes many problems with great consequences, essentially economical. Operation modal analysis (OMA) is one of the most crucial techniques used for dynamic analysis of civil engineering structures (e.g. bridges, dams or tunnels). OMA uses various time and frequency domain methods to obtain the modal parameters. The analysis of OMA techniques can be used to detect, locate and ...
  • Equivalent integral conditions related to bilinear Hardy-type inequalities 

    Kanjilal, Saikat; Persson, Lars Erik; Shambilova, Guldarya E (Journal article; Tidsskriftartikkel; Peer reviewed, 2019)
    Infinitely many, even scales of, equivalent conditions are derived to characterize the bilinear Hardy-type inequality under various ranges of parameters.
  • Singularly perturbed spectral problems in a thin cylinder with fourier conditions on its bases 

    Piatnitski, Andrey; Rybalko, Volodymyr (Journal article; Tidsskriftartikkel; Peer reviewed, 2019)
    The paper deals with the bottom of the spectrum of a singularly perturbed second order elliptic operator defined in a thin cylinder and having locally periodic coefficients in the longitudinal direction. We impose a homogeneous Neumann boundary condition on the lateral surface of the cylinder and a generic homogeneous Fourier condition at its bases. We then show that the asymptotic behavior of the ...
  • Homogenization of Levy-type operators with oscillating coefficients 

    Kassmann, Moritz; Piatnitski, Andrey; Zhizhina, Elena (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-01-05)
    The paper deals with homogenization of Lévy-type operators with rapidly oscillating coefficients. We consider cases of periodic and random statistically homogeneous micro-structures and show that in the limit we obtain a Lévy-operator. In the periodic case we study both symmetric and non-symmetric kernels whereas in the random case we only investigate symmetric kernels. We also address a nonlinear ...

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