Now showing items 861-880 of 927

    • SMEs challenges and needs in relation to innovation agendas and strategies 

      Ericson, Åsa; Holmqvist, Johan; Wenngren, Johan; Kaartinen, Heidi; Solvang, Wei Deng (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 with SMEs in the Northern parts of Finland, Norway and Sweden, but also on available innovation agendas and strategies for each country. The differences among the companies in those ...
    • 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 of this work has been to investigate and develop an instrument to detect red dye in diesel, based on the principle of absorption. The peaks of absorption in red and pure diesel ...
    • 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; Journal article; Tidsskriftsartikkel, 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 Hardy space H1/(1+α) to the space weak-L1/(1+α), (0 < α ≦ 1). In this paper we construct a martingale in the space H1/(1+α), which satisfies the conditions considered in [14], and so ...
    • 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 good wind resources from being utilized. This research paper is focused on to numerically simulate the rate and shape of atmospheric ice accretion on a full-scale horizontal axis ...
    • 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 imply new results in the theory of Hardy type inequalities. As applications both new and well-known results are pointed out.
    • 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 Arctic. An approach for quantifying the influence of local and regional pollution on measurements that may be misinterpreted as long-range transported one, is presented here. The ...
    • Experimental validation of icing rate using rotational load 

      Mughal, Umair Najeeb; Virk, Muhammad Shakeel; Kosugi, Kenji; Mochizuki, Shigeto (Peer reviewed; Journal article; Tidsskriftsartikkel, 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 rotational loadings, as a function of current demand. However the former may not necessarily be dynamic, whereas the later necessarily be rotational. Sufficiently at a fixed rpm, a ...
    • Multiphysics Based Design Study of an Atmospheric Icing Sensor 

      Mughal, Umair Najeeb; Virk, Muhammad Shakeel; Mustafa, Mohamad (Peer reviewed; Journal article; Tidsskriftsartikkel, 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 rate and melting rate. This sensor is constantly slowly rotating cylinder with four fins which measure atmospheric icing load and icing rate using rotational load measurement technique. ...
    • 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; Journal article; Tidsskriftsartikkel, 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. The full process is modelled in Aspen Plus® consisting of: an Air Separation Unit (ASU), an Advanced Supercritical Pulverised Fuel (ASC PF) power plant with a bituminous coal ...
    • A Goal Programming Approach for Green Supply Chain Network Optimization 

      Yu, Hao; Solvang, Wei Deng; Solvang, Bjørn (Chapter; Bokkapittel, 2016-10)
      Green supply chain management has been focused by both academicians and practitioners in recent years due to the increased public awareness on environmental problems and sustainable development. In this paper, a decision aided model for green supply chain network design and optimization is proposed to justify both economic and environmental performance in an optimal fashion. The model is formulated ...
    • A general reverse logistics network design model for product reuse and recycling with environmental considerations 

      Yu, Hao; Solvang, Wei Deng (Peer reviewed; Journal article; Tidsskriftsartikkel, 2016-04-02)
      Reverse logistics is believed to be one of the most promising solutions for capturing the remaining values from used products and has been extensively focused by both academics and practitioners during the past two decades. Conceptual framework, mathematical programming and computational algorithms have been developed for decision making at strategic, tactical and operational levels of a reverse ...
    • Modelled and observed sea-spray icing in Arctic-Norwegian waters 

      Samuelsen, Eirik Mikal; Edvardsen, Kåre; Graversen, Rune (Peer reviewed; Journal article; Tidsskriftsartikkel, 2016-11-15)
      Hazardous marine icing is a major concern for ships operating in Arctic waters during freezing conditions. Sea spray generated by the interaction between a ship and ocean waves is the most important water source in these dangerous icing events. Although there exist several data sets with observations of ice accretion in conjunction with meteorological and oceanographic parameters, these data sets ...
    • Thaw Penetration in Frozen Ground Subjected to Hydronic Heating 

      Sveen, Svein Erik; Nguyen, Hung Thanh; Sørensen, Bjørn Reidar (Peer reviewed; Journal article; Tidsskriftsartikkel, 2016-09-22)
      To facilitate excavation and foundation work in seasonally freezing or permafrost regions, the frozen soil must be thawed, either by natural (solar) thawing, or by artificial thawing where an auxiliary heat source is utilized to accelerate the process. In this paper, the process of rapid thawing of frozen ground subject to hydronic heating is studied. In particular, the performance characteristics ...
    • Biogas from Organic Waste - A Case Study 

      Mustafa, Mohamad; Calay, Rajnish K; Roman, Elisabeth (Peer reviewed; Journal article; Tidsskriftsartikkel, 2016-07-01)
      This paper presents a case study to investigate the potential for upgrade of a bio-waste treatment plant. The paper also discusses development potentials in order to optimize the plant for maximum energy and environmental benefits. Data gathered over two consecutive years about the production of biogas, energy and bio-rest were considered and mass balance analysis of inputs and outputs of the ...
    • Some sharp inequalities for integral operators with homogeneous kernel 

      Lukkassen, Dag; Persson, Lars Erik; Samko, Stefan G. (Peer reviewed; Journal article; Tidsskriftsartikkel, 2016-04-09)
      One goal of this paper is to show that a big number of inequalities for functions in Lp(R+), p ≥ 1, proved from time to time in journal publications are particular cases of some known general results for integral operators with homogeneous kernels including, in particular, the statements on sharp constants. Some new results are also included, e.g. the similar general equivalence result is proved and ...
    • Optimization of long-term performance of municipal solid waste management system: A bi-objective mathematical model 

      Yu, Hao; Solvang, Wei Deng; Li, Shiyun (Peer reviewed; Journal article; Tidsskriftsartikkel, 2015)
      Management of municipal solid waste has becoming an extremely important topic for any urban authorities in recent years due to the rapidly increasing solid waste quantity and potential environmental pollution. In this paper, a bi-objective dynamic linear programming model is developed for decision making and supporting in the long-term operation of municipal solid waste management system. The proposed ...
    • A green supply chain network design model for enhancing competitiveness and sustainability of companies in high north arctic regions 

      Yu, Hao; Solvang, Wei Deng; Chen, Chen (Peer reviewed; Journal article; Tidsskriftsartikkel, 2014)
      To survive in today's competitive and ever-changing marketplace, companies need not only to engage in their products and/or services, but also to focus on the management of the whole supply chain. Effectively managing and balancing the profitability and interconnection of each player in the supply chain will improve the overall supply chain surplus as well as individual profit. However, it is extremely ...
    • Some new estimates of the ‘Jensen gap’ 

      Abramovich, Shoshana; Persson, Lars Erik (Peer reviewed; Journal article; Tidsskriftsartikkel, 2016-02-01)
    • Sharp Hp-Lp type inequalities of weighted maximal operators of Vilenkin-Nörlund means and its applications 

      Baramidze, Lasha; Persson, Lars Erik; Tephnadze, G; Wall, P (Peer reviewed; Journal article; Tidsskriftsartikkel, 2016-10-01)
      We prove and discuss some new Hp-Lp type inequalities of weighted maximal operators of Vilenkin-Nörlund means with monotone coefficients. It is also proved that these inequalities are the best possible in a special sense. We also apply these results to prove strong summability for such Vilenkin-Nörlund means. As applications, both some well-known and new results are pointed out.
    • Weighted Hardy type inequalities for supremum operators on the cones of monotone functions 

      Persson, Lars Erik; Shambilova, Guldarya E.; Stepanov, Vladimir D. (Peer reviewed; Journal article; Tidsskriftsartikkel, 2016-09-28)
      The complete characterization of the weighted L<sup>p</sup>-L<sup>r</sup> inequalities of supremum operators on the cones of monotone functions for all 0 < p, r≤∞ is given.