Viser treff 183-202 av 309

    • Modelling the transport of oil after a proposed oil spill accident in Barents Sea and its environmental impact on Alke species 

      Lu, Jinmei; Yuan, Fuqing; Mikkelsen, J.D.; Ohm, C; Stange, E; Holand, M (Konferansebidrag; Conference object, 2017)
      Accidental oil spills can have significant effect on the coastal and marine environment. As the oil extraction and exploration activities increase in the Barents Sea, it is of increasingly importance to investigate the potential oil spill incidents associated with these activities. In this study, the transport and fate of oil after a proposed oil spill incident in Barents Sea was modelled by oil ...
    • Modern Army for Modern Times or Private Paramilitary? Polish Territorial Defense Force as a Benchmark Case in Conflict Evolution 

      Fornusek, Martin; Bartoszewicz, Monika Gabriela (Journal article; Tidsskriftartikkel, 2023)
      The new Polish military branch, the Territorial Defense Force (TDF), has been described both as a defensive tool against Russian hybrid warfare and as a private paramilitary force of the incumbent Law and Justice Party. This paper examines the strategic, political, and military purposes of the Territorial Defense Force using two theoretical models. One is designed for analyzing units intended to ...
    • Multi-criteria Decision-making Methods for Sustainable Decisionmaking in the Mining Industry (A Comprehensive Study) 

      Nouri Qarahassanlou, Ali; Barabadi, Abbas (Journal article; Tidsskriftartikkel; Peer reviewed, 2024)
      The mining industry operates in a complex and dynamic environment and faces many challenges that can negatively affect sustainable development goals. To avoid these effects, mining needs to adopt strategic decisions. Therefore, it requires effective decision-making processes for resource optimization, operational efficiency, and sustainability. Multicriteria decision-making methods (MCDM) have been ...
    • Multi-fluidic Simulation using Multiphysics tools: Case Study on a LNG Plant 

      Khawaja, Hassan Abbas; Schive, Tor; Edvardsen, Kåre (Conference object; Konferansebidrag, 2014)
    • Multiphysics design optimization for aerospace applications: Case study on helicopter loading hanger 

      Xue, Hui; Khawaja, Hassan Abbas; Moatamedi, Mojtaba (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
      This paper presents the Multiphysics technique applied in the design optimization of a loading hanger for an aerial crane. In this study, design optimization is applied on the geometric modelling of a part being used in an aerial crane operation. A set of dimensional and loading requirements are provided. Various geometric models are built using SolidWorks® Computer Aided Design (CAD) Package. In ...
    • Multiphysics investigation of Ice Adhesion over PVC surface 

      Xue, Hui; Khawaja, Hassan Abbas (Conference object; Konferansebidrag, 2015-12-10)
      This work investigates the ice over a PVC (polyvinyl chloride also known as ‘PVC’) surface as a two-layer laminate model. In this study, ice was frozen over a PVC surface and allowed to adhere. The built samples were tested experimentally in a four-point loading setup. The experimental results contain strain data gathered through data acquisition system using LabView® software. The data was collected ...
    • Multiphysics Simulation of Infrared Signature of an Ice Cube 

      Khawaja, Hassan Abbas; Rashid, Taimur; Eiksund, Oddmar; Broadal, Eivind; Edvardsen, Kåre (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-08-29)
      This paper presents numerical methodologies to simulate the Infrared (IR) signature of an ice cube. The ice was frozen in a cold environment (-28<sup>o</sup>C) and allowed to have uniform temperature throughout. It was then taken out and let to warm at room temperature conditions by means of natural convection. A 3D transient heat equation is solved using three different methodologies. In the first ...
    • Multiphysics Simulation of Infrared Signature of an Ice Cube 

      Khawaja, Hassan Abbas; Rashid, Taimur; Eiksund, Oddmar; Brodal, Eivind; Edvardsen, Kåre (Conference object; Konferansebidrag, 2015-12-11)
      This poster presents the Multiphysics numerical methodologies used to simulate the Infrared (IR) signature of an ice cube when taken out of the cold environment (-28 C) and allowed to warm at room temperature conditions by means of natural convection. The ice cube is chosen to simplify the geometry. The cubical geometry can be discretized simply and hence allows easy application of Multiphysics ...
    • Multiphysics Study of Forced Convection Conjugate Heat Transfer (CHT) Problem 

      Leyli, Amir Nadem; Moatamedi, Mojtaba; Alzahabi, Basem (Journal article; Peer reviewed, 2019)
      This paper presents a problem undergoing conjugate heat transfer (CHT). Conjugate heat transfer problems are common is domestic heating/cooling, industrial heat exchangers, cooling of electronics (e.g. PC fans). It is to be noted that in conjugate heat transfer problems, the convection part of the heat transfer is dominated.<p> In the given study, a hypothetical case is built where a heat source (a ...
    • Multiphysicsbased Condition Monitoring of Composite Materials 

      Xue, Hui; Sharma, Puneet; Khawaja, Hassan Abbas (Conference object; Konferansebidrag, 2015-12-10)
      Composites are increasingly being used in products such as: automobiles, bridges, boats, drillships, offshore platforms, aircrafts and satellites. The increased usage of these composite materials and the fact that the conditions pertaining to their failure are not fully understood makes it imperative to develop condition monitoring systems for composite structures. <br>In this work, we present a ...
    • Multiple Model Adaptive Estimation Coupled With Nonlinear Function Approximation and Gaussian Mixture Models for Predicting Fuel Consumption in Marine Engines 

      Taghavi, Mahmood; Perera, Lokukaluge Prasad Channa (Chapter; Bokkapittel, 2023)
      Digital twin type models can be developed for physical systems that are complex nonlinear a system of systems (SoS). However, such models are usually difficult to represent by linear equations. Therefore, an adequate linearization technique should be introduced. Therefore, linear models as digital twins can be interpreted easily and need much less computational power when applied to various industrial ...
    • Multivariate analysis of Co, Fe and Ni leaching from tailings following simulated temperature change 

      Fu, Shuai; Lu, Jinmei; Yuan, Fuqing (Journal article; Peer reviewed, 2018)
      A series of column leaching experiments were performed to understand the leaching behavior of Co, Fe and Ni in Ballangen mine tailings. Multivariate statistical approaches to evaluate potential risk variations in leachate quality and identifies temperature effects on their leaching behavior. Results from column leaching test indicated that the mobility of showed higher temperature may encourage ...
    • Nettverksorganisasjoners betydning for kunnskapstilgang og innovasjon 

      Underthun, Anders; Svare, Helge; Gausdal, Anne Haugen (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-08-04)
      I denne artikkelen undersøker vi om regionale innovasjonsnettverksorganisasjoner (RINOer) bidrar til bedre kunnskapstilgang og innovasjon. Hvilke organiserte aktiviteter eller funksjoner i RINOen er i så fall relevante? Og i hvilken grad påvirker andre kjennetegn ved RINOene eller bedriftene som deltar, et slikt utfall? Bedriftene i studien rapporterer at RINO-deltakelsen har bidratt positivt både ...
    • New insight into air/spray boundary interaction for diesel and biodiesel fuels under different fuel temperatures 

      Jabbarzadeh Ghandilou, Ali; Taghavifar, Hadi (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-08-09)
      The liquid fuel breakup mechanism in spray injection with ambient air for diesel and biodiesel at different fuel temperatures is studied numerically. We find that biodiesel fuel type injection with low fuel temperature induces more air entrainment volume to the boundary of the spray than diesel fuel injection and higher fuel temperature. Meanwhile, the normalized parcel density for biodiesel is 12% ...
    • A New Introductory Course in the Engineering Education at the University of Tromsø 

      Gjengedal, Arne Ketil; Schive, Tor (Journal article; Tidsskriftartikkel; Peer reviewed, 2016)
      In 2011 a new national curriculum for the education of engineers was established in Norway. The objective of the curriculum is to ascertain that engineering education is professionally oriented, integrated, research-based and has a high academic standard. Institutions are instructed to facilitate a holistic approach to the engineering profession, which integrates social science, technology, science ...
    • Noise-intensification data augmented machine learning for day-ahead wind power forecast 

      Chen, Hao; Birkelund, Yngve; Batalden, Bjørn-Morten; Barabadi, Abbas (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-10)
      The day-ahead wind power forecast is essential for the designation of dispatch schedules for the grid and rational arrangement for production planning by power generation companies. This paper specifically investigates the effect of adding noise to the original wind data for forecasting models. Linear regression, artificial neural networks, and adaptive boosting predictive models based on ...
    • Non-contact sensing and modelling on the voltage and electric field for powered transmission line 

      Yuan, Fuqing; Lu, Jinmei (Journal article; Tidsskriftartikkel; Peer reviewed, 2020)
      From environmental, ecological or technical perspectives, the measurement of the potential voltage, electric field near the power transmission line is essential to ensure the exposure level does not exceed the limits of the government specified. This paper develops a potential voltage model, designs experiments to verify the developed model and to evaluate the parameters in the model. An electric ...
    • Non-Preemptive Open Shop Scheduling Considering Machine Availability 

      Shojaeibarjouei, Abolfazl; Barabadi, Abbas; Tavakkoli-Moghaddam, Reza (Journal article; Tidsskriftartikkel; Peer reviewed, 2019)
      This paper considers a non-preemptive open shop scheduling problem (OSSP), in which machines are not available to process jobs on known periodic interval times resulted from periodic service repair, rest period, and so on. Asymmetric transportation time between machines is considered, which can be different from one job to another. The objective is to minimize the weighted mean completion time (WMCT). ...
    • Norway-Russia disaster diplomacy for Svalbard 

      Kelman, Ilan; Sydnes, Are K.; Duda, Patrizia Isabelle; Nikitina, Elena; Webersik, Christian (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-07-03)
      The Arctic is frequently framed as a region of disaster and conflict, as well as of opportunity and cooperation. Disaster diplomacy is one approach for examining how dealing with disasters might or might not affect conflict and cooperation, yet little work on Arctic disaster diplomacy has been completed, especially regarding specific bilateral relations. This paper contributes to filling in this gap ...
    • Numerical investigation on the cage-to-cage wake effect: A case study of a 4 × 2 cage array 

      Sim, Jaesub; Cheng, Hui; Aarsæther, Karl Gunnar; Li, Lin; Ong, Muk Chen (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-12)
      Aquaculture has been the world’s fastest-growing food producing method and grown to become the second-largest export industry in Norway during the past 40 years. Usually, the high-value fish such as Atlantic Salmon (<i>Salmo salar</i>) is raised in a multi-cage fish farm, where the flow interactions between fish cages exist. In this study, the interactions between fish cages are implemented into the ...