Blar i NTNU Open på tittel

Viser treff 44756-44775 av 101204

    • Hydrothermal syntheis and characterization of BaTiO3 nanoparticles 

      Hempel, Frida Sveen (Master thesis, 2018)
      This thesis investigates the size dependent dipole disorder in ferroelectric materials, which leads to a loss of macroscopic ferroelectricity, and the role of the depolarization field on this disorder. Structural ...

    • Hydrothermal Synthesis of Alkali Niobates 

      Vadseth, Daniel Stormer (Master thesis, 2021)
      Reaksjonsforholdene under hydrotermal syntese av kalium- og natriumniobater har blitt undersøkt med hensikt å forstå effekten av reaksjonsforholdene på kinetikken, faseformasjonen, morfologien og gitteparametrene. Kalium ...

    • Hydrothermal synthesis of hexagonal YMnO3 and YbMnO3 below 250 °C 

      Marshall, Kenneth Paul; Eidem, Sigurd Opdal; Småbråten, Didrik Rene; Selbach, Sverre Magnus; Grande, Tor; Einarsrud, Mari-Ann (Peer reviewed; Journal article, 2021)
      The hydrothermal synthesis of hexagonal YMnO3 and YbMnO3 are reported using high KOH mineraliser concentrations (>10 M) and low temperatures (<240 °C). The relation between reaction parameters and resulting phase purity ...

    • Hydrothermal Synthesis of LaFeO3 

      Reksten, Anita (Master thesis, 2011)
      This work explores the hydrothermal synthesis of LaFeO3 (LFO) nanorods with a high aspect ratio. Synthesis of rod shaped LFO is a stepping stone to the synthesis of strontium doped LFO (LSF) nanorods with high aspect ratio. ...

    • Hydrothermal synthesis of materials for intermediate band solar cells 

      Mikalsen, Ragni Fjellgaard (Master thesis, 2013)
      Solar energy is an abundant energy source that may provide an environmentallyfriendly alternative to fossil fuels. The utilization of the solar energy have so farbeen limited by various energy losses in the photovoltaic ...

    • Hydrothermal synthesis of SrxBa1–xNb2O6 on nanostructured substrates 

      Einarsrud, Mari-Ann (Master thesis, 2019)
      I nyere tid har syntese av bly-frie ferroelektriske materialer tiltrukket seg stadig mer oppmerksomhet og et av de studerte materialene er strontium barium niobat (SBN). SBN har vist gode elektro-optiske egenskaper, samt ...

    • Hydrotreating of Bio-Oils over Metal-Phosphide Catalysts 

      Carlsen, Christina (Master thesis, 2012)
      A concern over the impact of fossil fuels on the environment has made the researchers to look for more environmental options. One alternative is bio-oils produced from lignocellulosic material. However, the abundance of ...

    • Hydroxyl airglow observations for investigating atmospheric dynamics: Results and challenges 

      Wüst, Sabine; Bittner, Michael; Espy, Patrick Joseph; French, W. John R.; Mulligan, Frank J. (Peer reviewed; Journal article, 2023)
      Measurements of hydroxyl (OH*) airglow intensity are a straightforward and cost-efficient method which allows the derivation of information about the climate and dynamics of the upper mesosphere/lower thermosphere (UMLT) ...

    • Hydroxyl Functionalized Pyridinium Ionic Liquids: Experimental and Theoretical Study on Physicochemical and Electrochemical Properties 

      Kallidanthiyil Chellappan, Lethesh; Venkatraman, Vishwesh; Fiksdahl, Anne; Evjen, Sigvart (Journal article; Peer reviewed, 2019)
      Structurally modified hydroxyl functionalized pyridinium ionic liquids (ILs), liquid at room temperature, were synthesized and characterized. Alkylated N-(2-hydroxyethyl)-pyridinium ILs were prepared from alkylpyridines ...

    • Hygienic standards and practices in Norwegian salmon Processing plants 

      Løvdal, Trond; Giske, Lars André Langøyli; Bjørlykhaug, Emil; Eri, Ingrid B.; Mork, Ola Jon (Journal article; Peer reviewed, 2017)
      The farmed salmon industry is important economically for several countries with Norway as the main producer constituting 53% of the world total. Bacterial contamination of salmon products may occur during processing, ...

    • HyGreGel: A new class of gel systems for water diversion by in-depth reservoir placement 

      Najafiazar, Bahador (Doctoral theses at NTNU;2019:336, Doctoral thesis, 2019)
      High water production is typically a major problem late in the life cycle of a water flooded hydrocarbon reservoir. Reservoir heterogeneity plays a significant role in creating this problem. An example is highly permeable ...

    • Hygroscopic buffering effects in exposed cross-laminated timber surfaces and indoor climate in a Norwegian primary school 

      Skulberg, Knut Ragnvald; Nyrud, Anders Q.; Nore, Kristine (Peer reviewed; Journal article, 2022)
      Laboratory studies have shown that wood has hygroscopic properties. When used as a construction material in buildings, it can thus influence indoor relative humidity and temperature. Ventilation can affect indoor climate ...

    • Hygrothermal Aging of Amine Epoxy: Reversible Static and Fatigue Properties 

      Krauklis, Andrey; Gagani, Abedin; Echtermeyer, Andreas (Journal article; Peer reviewed, 2018)
      Fiber-reinforced polymers (FRP) are widely used in structural applications. Long-term properties of such materials exposed to water are of high concern and interest, especially for subsea and offshore applications. The ...

    • Hygrothermal Modeling of Masonry with Interior Insulation Retrofit - Perspectives on hygrothermal performance and modeling-uncertainty 

      Knarud, Jon Ivar Belghaug (Doctoral theses at NTNU;2024:43, Doctoral thesis, 2024)
      Energy retrofit of existing buildings is mainly an endeavor to reduce energy consumption. Interior insulation retrofit of masonry falls among retrofit measures in this regard. However, interior insulation of masonry may ...

    • Hygrothermal performance of ventilated wooden cladding 

      Nore, Kristine (Doktoravhandlinger ved NTNU, 1503-8181; 2009:31, Doctoral thesis, 2010)
      This PhD project contributes to more accurate design guidelines for high-performance building envelopes by analysis of hygrothermal performance of ventilated wooden cladding. Hygrothermal performance is defined by cladding ...

    • Hygrothermal Properties of Compressed Earthen Bricks 

      Zhang, Lei; Yang, Liu; Jelle, Bjørn Petter; Wang, Yu; Gustavsen, Arild (Journal article; Peer reviewed, 2018)
      The present study investigates the relationship between bulk density and hygrothermal behaviour of compressed earthen bricks. The experimental results show that the thermal conductivity linearly increases from 0.5228 W/(m ...

    • Hygrothermal Simulation of Interior Insulated Brick Wall - Perspectives on Uncertainty and Sensitivity 

      Knarud, Jon Ivar Belghaug; Kvande, Tore; Geving, Stig (Peer reviewed; Journal article, 2023)
      Energy retrofit of existing masonry buildings has become attractive to meet demands for reduction in energy consumption. Retrofit may, however, introduce moisture risk that needs to be assessed. Hygrothermal simulation ...

    • Hygrothermal simulations of thermally insulated basement envelopes - Importance of boundary conditions below grade 

      Asphaug, Silje Kathrin; Time, Berit; Kvande, Tore (Peer reviewed; Journal article, 2021)
      Hygrothermal simulations are widely used to predict and optimise the hygrothermal performances of building envelopes. For the walls and floors in basements, however, determining the variation of the exterior hygrothermal ...

    • Hylleplassering og salg 

      Klæthe, Silje Merethe (Bachelor thesis, 2010)
      Denne oppgaven er skrevet på oppdrag fra Shell/7-eleven Gjøvik og skal se på effekten hylleplassering har på salget. Del 1 gir et bilde av varehandelen i Norge og viser at en stor del av verdiskapningen i norsk næringsliv ...

    • HyMo 1.0 - Hydromorfologisk klassifisering av vannforekomster i elver og innsjøer 

      Harby, Atle; Bakken, Tor Haakon; Hansen, Bendik Kristoffer Torp; Lindholm, Markus; Museth, Jon; Sundt, Håkon (SINTEF Rapport, Research report, 2023)
      Denne rapporten presenterer resultater fra uttesting av hydromorfologisk (HyMo) klassifisering for elver og innsjøer til bruk for arbeid med vannforskriften. Uttesting er i stor grad utført av regionale og nasjonale ...