Nye registreringer

  • Brannsikring av ventilasjonskanaler. Fire safety in ventilationducts 

    Aastorp-Tangen, Sigve; Gjendem, Jan Rachid (Master thesis; Mastergradsoppgave, 2016-11-17)
    Brannsikring av ventilasjonssystemer har fått svært mye fokus de siste årene, på grunn av uklare retningslinjer for prosjekterende. TEK10 setter kun funksjonskrav for hvordan tekniske installasjoner skal brannsikres, og ...
  • Review of marine icing and anti-/de-icing systems 

    Rashid, Taimur; Khawaja, Hassan Abbas; Edvardsen, Kåre (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-08-17)
    The aim of this work is to review the phenomenon of icing in marine operations. The focus is on two main sources of icing, namely atmospheric and sea spray. The literature reveals that sea spray icing is the main contributor ...
  • Some new Hardy-type inequalities in q-analysis 

    Baiarystanov, A.O.; Persson, Lars Erik; Shaimardan, S.; Temirkhanova, A. (Peer reviewed, 2016-09)
    We derive necessary and sufficient conditions (of Muckenhoupt-Bradley type) for the validity of q -analogs of (r, p) -weighted Hardy-type inequalities for all possible positive values of the parameters r and p . We also ...
  • A new discrete Hardy-type inequality with kernels and monotone functions 

    Kalybay, Aigerim; Persson, Lars Erik; Temirkhanova, Ainur (Peer reviewed, 2015-10-06)
    A new discrete Hardy-type inequality with kernels and monotone functions is proved for the case 1<q<p<∞1<q<p<∞. This result is discussed in a general framework and some applications related to Hölder’s summation method are ...
  • Some new Hardy-type inequalities for Riemann-Liouville fractional q-integral operator 

    Persson, Lars Erik; Shaimardan, Serikbol (Peer reviewed, 2015-09-24)
    We consider the q-analog of the Riemann-Liouville fractional q-integral operator of order n∈Nn∈N. Some new Hardy-type inequalities for this operator are proved and discussed.
  • Time scale Hardy-type inequalities with ‘broken’ exponent p 

    Oguntuase, James A; Fabelurin, Olanrewaju O; Adeagbo-Sheikh, Abdulaziz G; Persson, Lars Erik (Peer reviewed, 2015-01-16)
    In this paper, some new Hardy-type inequalities involving ?broken? exponents are derived on arbitrary time scales. Our approach uses both convexity and superquadracity arguments, and the results obtained generalize, ...
  • Asymptotics of a spectral-sieve problem 

    Amirat, Youcef; Bodart, Olivier; Chechkin, Gregory; Piatnitski, Andrey (Peer reviewed, 2015-11-18)
    In a bounded domain with a thin periodically punctured interface we study the limit behavior of the bottom of spectrum for a Steklov type spectral problem, the Steklov boundary condition being imposed on the perforation ...
  • Osmosis for non-electrolyte solvents in permeable periodic porous media 

    Heintz, Alexei; Piatnitski, Andrey (Peer reviewed, 2016-08)
    The paper gives a rigorous description, based on mathematical homogenization theory, for flows of solvents with not charged solute particles under osmotic pressure for periodic porous media permeable for solute particles. ...
  • Singularly perturbed spectral problems with Neumann boundary conditions 

    Piatnitski, Andrey; Rybalko, A; Rybalko, V (Peer reviewed, 2015-09-07)
    The paper deals with the Neumann spectral problem for a singularly perturbed second-order elliptic operator with bounded lower order terms. The main goal is to provide a refined description of the limit behaviour of the ...
  • Homogenization of random Navier–Stokes-type system for electrorheological fluid 

    Piatnitski, Andrey; Zhikov, Vasily (Peer reviewed, 2015-11-19)
    The paper deals with homogenization of Navier–Stokes-type system describing electrorheological fluid with random characteristics. Under non-standard growth conditions we construct the homogenized model and prove the ...
  • Welding Certification for Autonomous Robotized Welding 

    Sziebig, Gabor; Maske, Thomas (Chapter, 2016-10-23)
    The increased production of more and more complex products challenges the accuracy of manual welding, and increase the time it takes to program automatic welding systems. The main objective for the article is to explore ...
  • SMEs challenges and needs in relation to innovation agendas and strategies 

    Ericson, Åsa; Holmqvist, Johan; Wenngren, Johan; Kaartinen, Heidi; Solvang, Wei Deng (Chapter; Conference object; Konferansebidrag, 2016-06-21)
    Regional research project are, as is also regional industry, highly need-based. That is, understanding the stakeholders’ (or customers’) real challenges and related needs is important. This study is based on interviews ...
  • Detection of red dye in diesel oil using UV-absorption and silicon photo detector 

    Varughese, Bindu Sara (Conference object; Konferansebidrag, 2016-12-08)
    Developing a sensitive and effective instrument for detecting the presence of red dye in diesel fuel is very advantageous for governments in preventing tax loss by controlling illegal use of the diesel fuel. The objective ...
  • A note on the maximal operators of Vilenkin-Nörlund means with non-increasing coefficients 

    Memić, Nacima; Persson, Lars Erik; Tephnadze, George; Kroo, A (Peer reviewed, 2016)
    In [14] we investigated some Vilenkin—Nörlund means with non-increasing coefficients. In particular, it was proved that under some special conditions the maximal operators of such summabily methods are bounded from the ...
  • Multiphysics based Numerical Study of Atmospheric Ice Accretion on a Full Scale Horizontal Axis Wind Turbine Blade 

    Virk, Muhammad Shakeel; Mughal, Umair Najeeb; Hu, Q; Jiang, X (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-08)
    Atmospheric icing on wind turbines have been recognized as a hindrance to the development of the wind power in cold regions, where uncertainty surrounding the effects of icing on energy production may prevent otherwise ...
  • Boundedness and compactness of a class of Hardy type operators 

    Abylayeva, AAkbota M; Oinarov, Ryskul; Persson, Lars Erik (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-12-13)
    We establish characterizations of both boundedness and of compactness of a general class of fractional integral operators involving the Riemann-Liouville, Hadamard, and Erdelyi-Kober operators. In particular, these results ...
  • Influence of local and regional air pollution on atmospheric measurements in Ny-Ålesund 

    Dekhtyareva, Alena; Edvardsen, Kåre; Holmén, Kim; Hermansen, Ove; Hansson, Hans-Christen (Journal article; Tidsskriftartikkel; Peer reviewed, 2016)
    The Zeppelin observatory is a research station near the village Ny-Ålesund in Svalbard. The facility delivers data to international projects devoted to high data quality monitoring of the background air pollution in the ...
  • Experimental validation of icing rate using rotational load 

    Mughal, Umair Najeeb; Virk, Muhammad Shakeel; Kosugi, Kenji; Mochizuki, Shigeto (Peer reviewed, 2016-04-16)
    Icing load and icing rate are necessary feedback variables for an intelligent anti/de-icing systemtowork effectively in harsh cold environment of high north. These parametersmay be measured by axial loadings or by ...
  • Multiphysics Based Design Study of an Atmospheric Icing Sensor 

    Mughal, Umair Najeeb; Virk, Muhammad Shakeel; Mustafa, Mohamad (Peer reviewed, 2016)
    A design study of an atmospheric icing sensor is presented in this article. The proposed design of the sensor is aimed to detect an atmospheric icing event, to determine ice type as well as to measure icing load, icing ...
  • Integrated Oxyfuel Power Plant with Improved CO2 Separation and Compression Technology for EOR application 

    Font Palma, Carolina; Errey, Olivia; Corden, Caroline; Chalmers, Hannah; Lucquiaud, Mathieu; Saez, Maria Sanchez del Rio; Jackson, Steven; Medcalf, D; Livesey, B; Gibbins, Jon; Pourkashanian, M (Peer reviewed, 2016-06-25)
    An integrated advanced supercritical coal-fired oxyfuel power plant with a novel cryogenic CO2 separation and compression technology for high purity CO2 to suit injection for enhanced oil recovery purposes is investigated. ...

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