Viser treff 3726-3745 av 4765

    • Roll motion on small traditional Norwegian fishing vessels 

      Kristiansen, Gøran (Master thesis; Mastergradsoppgave, 2021-08-09)
      Roll motion is one of the six degrees of freedom and is the most difficult to predict, as roll motion is extremely sensitive to the viscous effect and induced flow separation. The smaller fishing vessel fleet commonly operates in almost all weather conditions, and sometimes in remote areas with cold arctic water where rescue can be far away and difficult. The safety of fishers depends on the vessel's ...
    • Room Temperature-Stable Magnesium Electride via Ni(II) Reduction 

      Do, Cuong Dat; Day, Craig S.; Odena, Carlota; Benet-Buchholz, Jordi; Xu, Liang; Foroutan-Nejad, Cina; Hopmann, Kathrin Helen; Martin, Ruben (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-07-13)
      Herein, we report the synthesis of highly reduced bipyridyl magnesium complexes and the first example of a stable organic magnesium electride supported by quantum mechanical computations and X-ray diffraction. These complexes serve as unconventional homogeneous reductants due to their high solubility, modular redox potentials, and formation of insoluble, non-coordinating byproducts. The applicability ...
    • Root Cause Analysis of fire in waste facilities: A case study of Tromsø municipality 

      Kargar, Marjan (Master thesis; Mastergradsoppgave, 2021-06-01)
      The amount of waste produced in Norway has been increased considerably in the past decades as a result of population and economic growth. Therefore, the role of waste management companies in society has become more important. One of the significant challenges in the waste facilities is the fire that occurs regularly and causes various problems for the waste management companies. Several causes can ...
    • ROPE: Reducing the Omni-kernel Power Expenses 

      Karlberg, Jan-Ove (Master thesis; Mastergradsoppgave, 2014-05-15)
      Over the last decade, power consumption and energy efficiency have arisen as important performance metrics for data center computing systems hosting cloud services. The incentives for reducing power consumption are several, and often span economic, technological, and environmental dimensions. Because of the vast number of computers currently employed in data centers, the economy of scale dictates ...
    • Rossby Wave Changes During the Recent Decades in Mid-Latitude Continents in the Northern Hemisphere 

      Juskenaite, Ieva (Master thesis; Mastergradsoppgave, 2022-06-22)
      Increasing frequency and severity of extreme weather events throughout the recent years is a highly concerning topic. Extreme and unusual weather conditions, such as heat waves, floods and cold spells are causing a major concern for humanity. Agricultural changes, damages in infrastructure and the loss of human lives are some of the extreme weather event consequences, with the most drastic consequences ...
    • Rotational averaging of multiphoton absorption cross sections 

      Friese, Daniel Henrik; Beerepoot, Maarten T. P.; Ruud, Kenneth (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
    • RS-HeRR: a rough set-based Hebbian rule reduction neuro-fuzzy system 

      Liu, Feng; Sekh, Arif Ahmed; Quek, Chai; Ng, Geok See; Prasad, Dilip K. (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-01)
      Interpretabilty is one of the desired characteristics in various classification task. Rule-based system and fuzzy logic can be used for interpretation in classification. The main drawback of rule-based system is that it may contain large complex rules for classification and sometimes it becomes very difficult in interpretation. Rule reduction is also difficult for various reasons. Removing important ...
    • RS-Seismic Processing and Web-Visualization 

      Pedersen, Tom Arne (Master thesis; Mastergradsoppgave, 2014-05-15)
      The University of Tromsø is conducting regular marine seismic acquisition cruises for scientific and educational purposes in the polar regions of the Norwegian Sea and beyond. Leading experts in the field currently employed by the Department of Geology at ui, have found the current seismic visualization tools lacking in several fields. The available seismic software provides a multitude of settings ...
    • Ruoksat. A system for capturing, persisting and presenting the digital footprint of soccer knowledge and expertise 

      Sørensen, Kim-Edgar (Master thesis; Mastergradsoppgave, 2013-06-01)
      There are currently over 27 000 registered soccer teams in Norway. However, even with mandatory coaching licenses, there are still a vast variety of approaches to how training sessions should be planned and executed. Even in top-level professional soccer organizations, the planning of exercises involves a considerable amount of manual labor. The most common approaches include using old-fashioned pen ...
    • Russia's Critical Infrastructure Policy: What do we Know About it? 

      Pursiainen, Christer Henrik (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-10-29)
      The article is an analytical state-of-the-art review of the Russian Federation’s critical infrastructure policy, starting from the 1990s but zooming in on the current situation. The article discusses what does critical infrastructure mean in the Russian context. It explores the country’s threat scenarios in this field, and asks what part is played by cyber security threats in this context. Further, ...
    • Safe and secure outsourced computing with fully homomorphic encryption and trusted execution environments 

      Singh, Isak Sunde (Master thesis; Mastergradsoppgave, 2020-06-30)
      Increases in data production and growing demands for more computing power leads to the current trend of outsourcing data and computation services to cloud providers. With data breaches and cases of data misuse becoming increasingly common, there is a high demand for secure systems. This, however, conflicts with the current data trust models. A solution to this that is becoming more common is the use ...
    • Safe Learning for Control using Control Lyapunov Functions and Control Barrier Functions: A Review 

      Sadanandan Anand, Akhil; Seel, Katrine; Gjærum, Vilde Benoni; Håkansson, Anne; Robinson, Haakon; Saad, Aya (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-10-01)
      Real-world autonomous systems are often controlled using conventional model-based control methods. But if accurate models of a system are not available, these methods may be unsuitable. For many safety-critical systems, such as robotic systems, a model of the system and a control strategy may be learned using data. When applying learning to safety-critical systems, guaranteeing safety during learning ...
    • Safety challenges related to autonomous ships in mixed navigational environments 

      Kim, Tae-Eun; Perera, Lokukaluge Prasad Channa; Sollid, Magne-Petter; Batalden, Bjørn-Morten; Sydnes, Are Kristoffer (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-30)
      Digitalization and technological advancements have accelerated the development and emergence of autonomous and remotely controlled ships in the maritime transport sector. This type of vessels consists of highly intelligent and adaptive functionalities, equipped with a variety of external sensors and actuators to gain situation awareness, automated control and adaptive maneuvering for achieving more ...
    • Salt movements in three provinces in the southwestern Barents Sea: development, timing, and implications of regional structural differences 

      Thorsen, Truls (Master thesis; Mastergradsoppgave, 2019-05-15)
      This study has investigated salt movements in the Nordkapp Basin, on the Loppa High (Svalis Dome) and on the Bjarmeland Platform (Samson- and Norvarg domes). The aim is to discuss how differences in salt growth potentially relates to the structural evolution of - and differences between - these three provinces. Evaluation of seismic 2D- and 3D data together with well correlation, allowed a regional ...
    • Salt-driven evolution of a gas hydrate reservoir in Green Canyon, Gulf of Mexico 

      Portnov, Aleksei D; Cook, Ann E.; Heidari, Mahdi; Sawyer, Derek E.; Nikolinakou, Maria (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09)
      The base of the gas hydrate stability zone (GHSZ) is a critical interface, providing a first-order estimate of gas hydrate distribution. Sensitivity to thermobaric conditions makes its prediction challenging particularly in the regions with dynamic pressure-temperature regime. In Green Canyon in the northern Gulf of Mexico (Block GC955), the seismically inferred base of the GHSZ is 450 meters (1476 ...
    • Samarbeid mellom Forsvaret og Politiet 

      Barzingey, Karock Nagmadin (Master thesis; Mastergradsoppgave, 2016-05-29)
      Denne oppgaven undersøker hvilke kommunikasjons- og koordineringsutfordringer som eksisterer i samarbeidet mellom politiet og forsvaret når det gjelder håndtering av uønskede hendelser. Den tar også for seg hvordan disse utfordringene påvirker samarbeidet i forhold til det å øke samfunnssikkerheten i Norge. Samarbeid mellom politiet og forsvaret er ofte på dagsordenen, og særlig i kjølvannet av ...
    • Samhandling og læring i et introduksjonsemne i fysikk basert på digital Peer Instruction 

      Winnberg, Øystein Grøntveit (Master thesis; Mastergradsoppgave, 2021-06-11)
      I de senere år har det vært en skifte mot økt bruk av digitale former for undervisning, og i 2020 ble dette spesielt framskyndet fordi brorparten av undervisningen på universitetsnivå måtte foregå digitalt på grunn av koronapendemien. Det er også voksende interesse for mer studentaktive undervisningsformer for å oppnå bedre læringsutbytte. Dette åpner for nye spørsmål rundt digitale studentaktive ...
    • Sammenhengen mellom landskap og tektonikk på Moskenesøya og Flakstadøya, Lofoten. 

      Trulssen, Mads Fremming (Master thesis; Mastergradsoppgave, 2008-12-04)
      Lofoten utgjør en opphevet horst i forhold til omkringliggende bassenger og består hovedsakelig av prekambrisk grunnfjell. Tidligere modeller viser at landområdene og sokkelområdene utenfor Lofoten ser ut til å ha hatt en lik ekstensjonshistorie med flere faser av forkastningsbevegelser, innsynkning og oppheving gjennom mesozoikum og kenozoikum. Steile strukturer i berggrunnen danner svakhetssoner ...
    • Sampling moiré method: a tool for sensing quadratic phase distortion and its correction for accurate quantitative phase microscopy 

      Jayakumar, Nikhil; Ahmad, Azeem; Mehta, Dalip Singh; Ahluwalia, Balpreet Singh (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-03-24)
      The advantages of quantitative phase microscopy (QPM) such as label-free imaging with high spatial sensitivity, live cell compatibility and high-speed imaging makes it viable for various biological applications. The measurement accuracy of QPM strongly relies on the shape of the recorded interferograms, whether straight or curved fringes are recorded during the data acquisition. Moreover, for a ...
    • Samspill mellom organisatorisk resiliens og sikkerhetskultur: En casestudie av en offshore installasjon 

      Pedersen, Lasse (Master thesis; Mastergradsoppgave, 2023-06-02)
      Denne studien undersøker samspillet mellom organisatorisk resiliens og sikkerhetskultur, i kontekst av en norsk olje- og gassorganisasjon. Norsk petroleumsindustri har vært gjennom et flertall ulykker. Sikkerhetskultur kan anses som en fundamental løsning for å kontrollere storulykker, men det er et behov for å utforske hvordan sikkerhetskultur kan effektiviseres. Ved å utvikle resiliens-kapabiliteter ...