• A field study of atmospheric icing analysis in a complex terrain of the high north 

      Rashid, Taimur; Mughal, Umair Najeeb; Mustafa, Mohamad; Virk, Muhammad Shakeel (Journal article; Tidsskriftartikkel; Peer reviewed, 2014-12)
      Analyses of atmospheric icing events hold the key for computing the significant parameters leading to icing load calculations. In the cold regions of the high north, atmospheric icing loads on structures become important when it comes to design and safety of infrastructures. Furthermore, icing load calculations over a certain period of time provide a vital input for designers to improve the ...
    • 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 ...
    • 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. 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 ...
    • Ice Detection Experimentation Setup Using Infrared and Active Heating 

      Rashid, Taimur; Khawaja, Hassan Abbas; Edvardsen, Kåre (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-07-24)
      The paper shows the possible implementation of Infrared (IR) ice detection technique. The experimental setup is implemented keeping in view of the marine icing phenomena over the ships and offshore structures. The detection mechanism is unique from the passive IR detection by introducing the active heating concept. The intervention of the active heating information inside the IR ice detection system ...
    • Modeling Bottom-Up Visual Attention Using Dihedral Group D4 

      Sharma, Puneet (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-08-15)
      In this paper, first, we briefly describe the dihedral group D4 that serves as the basis for calculating saliency in our proposed model. Second, our saliency model makes two major changes in a latest state-of-the-art model known as group-based asymmetry. First, based on the properties of the dihedral group D4, we simplify the asymmetry calculations associated with the measurement of saliency. ...
    • 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 to marine icing. This work discusses the available ice accretion prediction models on ships and offshore structures. It also reviews the anti-/de-icing technologies that can be ...
    • Modelled and observed sea-spray icing in Arctic-Norwegian waters 

      Samuelsen, Eirik Mikal; Edvardsen, Kåre; Graversen, Rune (Peer reviewed, 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 ...
    • 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 ...
    • Detection of Red Dye in Diesel Oil 

      Varughese, Bindu Sara; Khawaja, Hassan Abbas (Journal article; Tidsskriftartikkel; Peer reviewed, 2017)
      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 ...
    • Study of the required thermal insulation (IREQ) of clothing using infrared imaging 

      Ahmad, Tanveer; Rashid, Taimur; Khawaja, Hassan Abbas; Moatamedi, Mojtaba (Journal article; Tidsskriftartikkel; Peer reviewed, 2017)
      The sense of cold develops due to the increase in heat loss from a human body. Excessive cold can be a health hazard, since excessive heat loss from the body may result in hypothermia/frostbite. Decreased body temperature due to heat loss also affects the physical, manual and perceptive performance of individuals. Therefore, protective measures are taken through clothing that controls and regulates ...
    • Monitoring of nitrogen oxides at Svalbard: measurements in Adventdalen 

      Dekhtyareva, Alena; Holmén, Kim; Hermanson, Mark H (Conference object; Konferansebidrag, 2017)
    • Scenario-based approaches for handling uncertainty in MPC for power system frequency control 

      Ersdal, Anne Mai; Imsland, Lars Struen (Journal article; Peer reviewed, 2017)
      A stochastic nonlinear model predictive controller (SNMPC) is designed for automatic generator control of a proxy of the Nordic power system, and it is compared with a multi-stage nonlinear model predictive controller (MNMPC). Both controllers are scenario based, but originate in two different disturbance modeling paradigms; stochastic and deterministic. A simulation study indicates that the two ...
    • Study Of Wind Chill Effect and Thermal Insulation Using Infrared Imaging 

      Ahmad, Tanveer; Khawaja, Hassan (Conference object, 2017)
      Tanveer Ahmad presented his findings on using Infrared Imaging to identify the wind chill-effect and insulation of winter clothing. He showed qualitatively that IR can detect the effects of wind chill and conducted experiments to obtain data with a view to establishing metrics which can be used to assess the effectiveness of survival gear. An unusual item that cropped up during the presentation was ...
    • State-of-the-art techniques in crack detection and utilizing innovative materials for the repair and maintenance of roads 

      Khawaja, Hassan (Conference object, 2017)
      This work is looking into the issue of repairing and maintaining the roads using innovative materials in the Arctic region. We have conducted preliminary studies at UiT The Arctic University of Norway and found a suitable material that has potential to be applied on roads cracks or even coat the entire road. This is an ongoing work and has two main sections: 1) To investigate the suitable techniques ...
    • Fluid solid interaction simulation of CFRP shell structure 

      Khawaja, Hassan Abbas; Messahel, Ramzi; Souli, Mhmed; Al-Bahkali, Essam; Moatamedi, Mojtaba (Journal article; Tidsskriftartikkel; Peer reviewed, 2017)
      This work attempts to model the dynamic behavior of Carbon Fiber Reinforced Polymer (CFRP) shell structure subjected to water shock wave to improve the results presented in the study by Khawaja et al., 2014. In the previous study, the real physical problem was simplified by decoupling the fluid and the structural phenomena, applying the recorded experimental fluid pressure load to the CFRP shell ...
    • Solution of Pure Scattering Radiation Transport Equation (RTE) Using Finite Difference Method (FDM) 

      Khawaja, Hassan Abbas (Peer reviewed; Book; Chapter, 2017-05-19)
      Radiative transfer is the physical phenomenon of energy transfer in the form of electromagnetic radiation. The propagation of radiation through a medium is affected by absorption, emission, and scattering. Radiative Transfer Equation (RTE) have been applied in a many subjects including optics, astrophysics, atmospheric science, remote sensing, etc. Analytic solutions for RTE exist for simple cases, ...
    • Solution of Pure Scattering Radiation Transport Equation (RTE) Using Finite Difference Method (FDM) 

      Khawaja, Hassan Abbas (Conference object; Konferansebidrag, 2017-06)
      Radiative transfer is the physical phenomenon of energy transfer in the form of electromagnetic radiation. The propagation of radiation through a medium is affected by absorption, emission, and scattering. Radiative Transfer Equation (RTE) have been applied in a many subjects including optics, astrophysics, atmospheric science, remote sensing, etc. Analytic solutions for RTE exist for simple cases, ...
    • Affordances for capturing and re-enacting expert performance with wearables 

      Guest, Will; Wild, Fridolin; Vovk, Alla; Fominykh, Mikhail; Limbu, Bibeg; Klemke, Roland; Sharma, Puneet; Karjalainen, Jaakko; Smith, Carl; Rasool, Jazz; Aswat, Soyeb; Helin, Kaj; Di Mitri, Daniele; Schneider, Jan (Journal article; Peer reviewed, 2017-09-05)
      The WEKIT.one prototype is a platform for immersive procedural training with wearable sensors and Augmented Reality. Focusing on capture and re-enactment of human expertise, this work looks at the unique affordances of suitable hard- and software technologies. The practical challenges of interpreting expertise, using suitable sensors for its capture and specifying the means to describe and display ...
    • Ship-icing prediction methods applied in operational weather forecasting 

      Samuelsen, Eirik Mikal (Journal article; Peer reviewed, 2017-10-11)
      Sea-spray wetting of ships operating in cold environments imposes a great safety risk, due to icing. For this reason, marine-icing warnings have been a part of operational weather forecasting for the last five decades, yet verification of such warnings has only been done sparingly. This article evaluates different ship-icing methods applied in operational weather forecasting. The methods are tested ...
    • Sound waves in fluidized bed using CFD–DEM simulations 

      Khawaja, Hassan Abbas (Journal article; Peer reviewed, 2017-10-16)
      The speed of sound waves is investigated using CFD-DEM numerical simulations. Appropriate initial and boundary conditions are applied to capture the phenomenon. The effect of varying the height of the bed is also studied. The results of the simulations matched those from literature. The pressure and particle velocity profiles from the simulation showed the oscillatory behavior. Functions (based on ...