Viser treff 121-140 av 923

    • Using Infrared Thermography and Multiphysics Modelling to Investigate Ice 

      Khawaja, Hassan (Conference object; Konferansebidrag, 2022)
    • Best Venue to Disseminate Multiphysics Research: The International Journal of Multiphysics 

      Khawaja, Hassan (Conference object; Konferansebidrag, 2022)
      The International Journal of Multiphysics publishes peer-reviewed original research articles, review papers and communications in the broadly defined field of Multiphysics. The emphasis of this journal is on the theoretical development, numerical modelling and experimental investigations that underpin Multiphysics studies. The scope of the journal is to address the latest advances in theoretical ...
    • The International Conference of Multiphysics 2023 

      Khawaja, Hassan (Conference object; Konferansebidrag, 2022)
      The objective of The International Conference of Multiphysics is to share and explore findings on mathematical advances, numerical modelling and experimental validation of theoretical and practical systems in a wide range of applications. The scope of the conference is to address the latest advances in theoretical developments, numerical modelling and industrial application which will promote ...
    • Conceptual Design of Ice Detection/Mitigation System Based on Infrared Thermography 

      Adeel, Yousuf; Khawaja, Hassan; Virk, Muhammad Shakeel (Conference object; Konferansebidrag, 2022)
      Ice accretion has been a persisting issue in cold regions and poses a threat to onshore and offshore infrastructure, especially to sensitive equipment and personnel safety. Thermal infrared imaging (thermography) can be used as a non-destructive, non- invasive technique to determine the presence and thickness of ice over a surface. The paper presents early-stage experiment results with a FLIR® Lepton ...
    • Comparing RANS with LES - AMR Study in Indoor Bio-aerosol Transmission 

      Owolabi, Jibola Obafemi; Khawaja, Hassan; Aganovic, Amar (Conference object; Konferansebidrag, 2022)
      The study presents the multiphysics modeling of bio-aerosols generated from human respiratory impulses such as coughing, sneezing, breathing, and talking. These droplet-packed viruses exploit the influence of airflow for effortless transmission, rendering them a potential health risk to individuals in the same indoor environment. To gain insight into the transmission of these airborne particles, ...
    • Concept Validation of Windtech 'Cold' Sensation Measurement Device 

      Khawaja, Hassan (Conference object; Konferansebidrag, 2022)
      Prolonged 'cold' exposure poses numerous challenges for industrial operations, human survival, and living convenience. The impact of the cold cannot be quantified just based on temperatures; however, other factors such as wind speed, humidity, and irradiance have to be considered. Therefore, efforts have been made to develop combined indices, such as wind chill temperature (WCT), AccuWeather RealFeel® ...
    • Investigation of Composite Mechanical Properties from Additive Manufacturing 

      Andleeb, Zahra; Khawaja, Hassan; Andersen, Kristian G; Edvardsen, Kåre; Moatamedi, Mojtaba (Conference object; Konferansebidrag, 2022)
      Manufacturers consider carbon fiber as a wonder material for the world's economy. Its distinctive combination of high strength and low weight has helped drive the wind power revolution and make aircraft and ships more fuel-efficient. In addition, the carbon fiber structures can function longer and are more rigid than the traditional metallic models, making them more resilient in cold and more efficient ...
    • Experimental study on the surgical microenvironment in an operating room with mixing ventilation under positive and negative pressure 

      Bi, Yang; Josefine Heggebø, Frida; Harsem, Trond Thorgeir; Mathisen, Hans Martin; Aganovic, Amar; Cao, Guangyu (Chapter; Bokkapittel, 2021)
      Due to the outbreak of Covid-19, negative pressure operating room (NPOR) are strongly recommended to be applied to prevent spreading virus from infected patients to adjacent rooms during surgery procedures. However, there have been few experimental studies on the effect of OR pressure difference on the surgical microenvironment. This study aims to experimentally investigate the airflow distribution ...
    • Iron ore dust as a natural pigment in concrete with RCA for artwork application 

      Novakova, Iveta; Buyle, Boy-Arne; Ørmen, Lene Baadsvig (Chapter; Bokkapittel, 2022)
      A The innovative idea of utilization of iron ore dust (IODust), characterized by red hue typical for Narvik, came up during designing artwork for The Arctic University of Norway campus Narvik. The use of waste from iron ore production as a natural pigment was completed by partial replacement of natural aggregates (NA) by recycled concrete aggregates (RCA) to achieve a higher level of material ...
    • Modelling and analysis of long cables on the generator side of generator transformers 

      Jørgensen, Kjetil N. (Master thesis; Mastergradsoppgave, 2023-05-22)
      Denne oppgaven presenterer en studie om modellering og analyse av lengre kraftkabler på generatorsiden av en enhetstransformator i et generisk kraftsystem. Studien fokuserer på det teoretiske rammeverket som er nødvendig for å forstå problemet. De teoretiske delene inkluderer grunnleggende elektriske sannheter og deres effekter på hovedkomponentene i et kraftsystem. Den gjenværende teorien ...
    • Analysis of early-age properties of geopolymers with various waste materials 

      De Muynck, Dario; Heyndrickx, Marie-Laure (Master thesis; Mastergradsoppgave, 2023-05-14)
      As the demand for concrete increases to meet the expanding need, the environmental impact of its production cannot be ignored. The use of ordinary Portland cement (OPC) is known to deplete natural resources and release large amounts of CO2 into the atmosphere. Geopolymer concrete (GPC), made from waste and industrial by-products, has shown the potential to overcome the environmental issues associated ...
    • Analyse og optimalisering av varmesystem ved Vigør Rehabiliteringssykehus 

      Berntsen, Alexander (Master thesis; Mastergradsoppgave, 2023-05-12)
      Grunnet økningen i energipriser og økt press om å nå klimamål, har energiøkonomisering i bygg blitt et samfunnsaktuelt tema. Masteroppgaven bruker Vigør Rehabiliteringssykehus vannbårne varmeanlegg som et eksempelstudie, der formålet med oppgaven er å forenkle driften, redusere energiforbruket og kutte energikostnadene tilknyttet varmeanlegget. Siden 2000-tallet er et er gjort en rekke forsøk på å ...
    • A Two-Stage Deep Modeling Approach to Articulatory Inversion 

      Sabzi Shahrebabaki, Abdolreza; Olfati, Negar; Imran, Ali Shariq; Johnsen, Magne Hallstein; Siniscalchi, Sabato Marco; Svendsen, Torbjørn Karl (Chapter; Bokkapittel, 2021-05-13)
      This paper proposes a two-stage deep feed-forward neural network (DNN) to tackle the acoustic-to-articulatory inversion (AAI) problem. DNNs are a viable solution for the AAI task, but the temporal continuity of the estimated articulatory values has not been exploited properly when a DNN is employed. In this work, we propose to address the lack of any temporal constraints while enforcing a ...
    • Beam based finite element modelling of Herøysund bridge 

      Berg, Patrick Norheim (Master thesis; Mastergradsoppgave, 2023-05-15)
      In this thesis the candidate aims to model two finite elements models of the post tensioned concrete Herøysund bridge. First a solid element model is modelled using the documentation from the bridge construction, then a beam element model is modelled using the solid model as a foundation. These models are subjected to a structural analysis that applies boundary conditions, joints, mass, gravity, ...
    • Design of a Process Control System for Combustion Regulation by Moisture Content Measurement in Biomass Feed 

      Abioye, Oluwatomi (Master thesis; Mastergradsoppgave, 2023-05-15)
      Biomass has the capacity to generate a major part of the global renewable energy demands due to its large supply, versatility, and readily exploitable nature. Biomass can be produced from natural sources like wood waste, grasses, trees, and fast-growing energy crops. Biomass wood chips are produced from crushed trees and can be fed into combustion systems to supply heat energy to buildings. However, ...
    • Experimental Study on the Surgical Microenvironment in an Operating Room with Mixing Ventilation under Positive and Negative Pressure 

      Bi, Yang; Heggebø, Frida Josefine; Harsem, Trond Thorgeir; Mathisen, Hans Martin; Aganovic, Amar; Cao, Guangyu (Chapter; Bokkapittel, 2021)
      Due to the outbreak of Covid-19, negative pressure operating room (NPOR) are strongly recommended to be applied to prevent spreading virus from infected patients to adjacent rooms during surgery procedures. However, there have been few experimental studies on the effect of OR pressure difference on the surgical microenvironment. This study aims to experimentally investigate the airflow distribution ...
    • Load modeling from smart meter data using neural network methods 

      Kianpoor, Nasrin; Hoff, Bjarte; Østrem, Trond (Chapter; Bokkapittel, 2021)
      Electricity load modeling plays a critical role to conduct load forecasting or other applications such as non-intrusive load monitoring. For such a reason, this paper investigates a comparison study of two common artificial neural network methods (Multilayer perceptron (MLP) and radial basis function neural network (RBF-NN) for home load modeling application. The accuracy of load modeling using ...
    • Path Planning for Perception-Driven Obstacle-Aided Snake Robot Locomotion 

      Hanssen, Christian; Transeth, Aksel Andreas; Sanfilippo, Filippo; Liljebäck, Pål; Stavdahl, Øyvind (Chapter; Bokkapittel, 2020)
      Development of snake robots have been motivated by the ability of snakes to move efficiently in unstructured and cluttered environments. A snake robot has the potential to utilise obstacles for generating locomotion, in contrast to wheeled robots which are unable to move efficiently in rough terrain. In this paper, we propose a local path planning algorithm for snake robots based on obstacle-aided ...
    • The application of open access middleware for cooperation among heterogeneous manufacturing systems 

      Arnarson, Halldor; Solvang, Bjørn; Shu, Beibei (Chapter; Bokkapittel, 2020)
      The vision behind industry 4.0 is to create even smarter manufacturing facilities. Industry 4.0 includes both hardware and software components, which are expected to seamlessly interact in a secure manner. Thus, machinery and software components from different manufacturers should be able to communicate in a common language. Such a challenge is typically met by introducing a “middleware” to serve ...
    • Tailored Iterated Greedy metaheuristic for a scheduling problem in metal 3D printing 

      Ying, Kuo-Ching; Pourhejazy, Pourya; Huang, Ya-Hsuan (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-24)
      This article contributes to the additive manufacturing-based production planning literature by developing a Mixed-Integer Linear Programming (MILP) formulation for the Identical Parallel 3D-Printing Machines Scheduling Problem considering batching, multiple build platforms of restricted sizes, and sequence-independent setup times. Besides, a customized metaheuristic, named the Tailored Iterated ...