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norskFakultet for naturvitenskap og teknologi: Recent submissions
Now showing items 4081-4100 of 5327
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An Insight into the Aliivibrio genus. A comparative study on relationships and traits of species within the genus Aliivibrio
(Master thesis; Mastergradsoppgave, 2016-05-18)Few studies have emphasized on the genus Aliivibrio as a whole and lags behind the better known Vibrio. Nevertheless, the Aliivibrio has for several decades been associated with species expressing bioluminescence like the Aliivibrio fischeri, but has also been linked to costly diseases in the fish farming industry such as Aliivibrio salmonicida. In an attempt to gain insight in the genus on a ... -
Paris-toppmøtet og spillet om CO2-kvotene
(Chronicle; Kronikk, 2015-11-25) -
A Brief Look at the Performance of PV in Norway
(Master thesis; Mastergradsoppgave, 2016-12-15)In the past years the Norwegian PV market has grown substantially. The importance of data on how PV systems perform in Norway is therefore also increasing. In this thesis several Norwegian PV systems are analyzed mainly in terms of annual specific yields. The systems are located in western and southeastern Norway and near horizontal, tilted and vertical modules are looked at. Results show pretty ... -
Novel antimicrobial peptides EeCentrocins 1, 2 and EeStrongylocin 2 from the Edible sea urchin Echinus esculentus have 6-br-trp post-translational modifications
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-03-23)The global problem of microbial resistance to antibiotics has resulted in an urgent need to develop new antimicrobial agents. Natural antimicrobial peptides are considered promising candidates for drug development. Echinoderms, which rely on innate immunity factors in the defence against harmful microorganisms, are sources of novel antimicrobial peptides. This study aimed to isolate and characterise ... -
Scanning acoustic microscopy—A novel noninvasive method to determine tumor interstitial fluid pressure in a xenograft tumor model
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-04-22)Elevated tumor interstitial fluid pressure (TIFP) is a prominent feature of solid tumors and hampers the transmigration of therapeutic macromolecules, for example, large monoclonal antibodies, from tumor-supplying vessels into the tumor interstitium. TIFP values of up to 40 mm Hg have been measured in experimental solid tumors using two conventional invasive techniques: the wick-in-needle and the ... -
Learning similarities between irregularly sampled short multivariate time series from EHRs
(Conference object; Konferansebidrag, 2016-12-04)A large fraction of the Electronic Health Records consists of clinical multivariate time series. Building models for extracting information from these is important for improving the understanding of diseases, patient care and treatment. Such time series are oftentimes particularly challenging since they are characterized by multiple, possibly dependent variables, length variability and irregular ... -
Computational Fluid Dynamic Analysis of the Tesla Valve
(Conference object; Konferansebidrag, 2016-12-08)Serbian-born inventor Nikola Tesla invented the Tesla valve (Tesla's Valvular Conduit) and patented it in 1919. The Tesla valve is unique in the sense that it does not have any moving parts, but it can work as a one-way valve. Nikola Tesla invented this unit without advanced mathematical models, nor with the help of modern computing power. The original Tesla valve consisted of a set of cavities and ... -
Open-ended response theory with polarizable embedding: multiphoton absorption in biomolecular systems
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-09-19)We present the theory and implementation of an open-ended framework for electric response properties at the level of Hartree–Fock and Kohn–Sham density functional theory that includes effects from the molecular environment modeled by the polarizable embedding (PE) model. With this new state-of-the-art multiscale functionality, electric response properties to any order can be calculated for molecules ... -
Amplitude and size scaling for interchange motions of plasma filaments
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-12-07)The interchange dynamics and velocity scaling of blob-like plasma filaments are investigated using a two-field reduced fluid model. For incompressible flows due to buoyancy, the maximum velocity is proportional to the square root of the relative amplitude and the square root of its cross-field size. For compressible flows in a non-uniform magnetic field, this square root scaling only holds ... -
Implementing and optimizing a Sparse Matrix-Vector Multiplication with UPC
(Research report; Forskningsrapport, 2016)Programmability and performance-per-watt are the major challenges of the race to Exascale. In this study we focus on Partitioned Global Address Space (PGAS) languages, using UPC as a particular example. This category of parallel languages provides ease of programming as a strong advantage over the classic Message Passing Interface(MPI). PGAS has also advantages compared to classic shared memory ... -
Thermal Properties of SK One Component Polyurethane using Experiments and Multiphysics Simulations
(Conference object; Konferansebidrag, 2016-12-08)This study proposes to determine the thermal conductivity of SK One Component Polyurethane (SKOCP) developed by China Institute of Water Resources & Hydropower Research Beijing IWHR-KHL Co. Ltd. SKOCP provides excellent proof of aging and chemical resistance of this material. It is non-toxic, acts as a good anti-seepage, offers anti-abrasion and good anti-freezing performance. In addition, it has ... -
Study of Acoustics Properties of SK One Component Polyurethane and its Application in Arctic Marine Structures
(Conference object; Konferansebidrag, 2016-12-08)Marine noise reduction tends to be challenging and requires a comprehensive engineering approach. The soundproofing materials for marine noise reduction are usually exposed to high temperatures, potential fluid or oil spills, engine maintenance and a high airflow environment. This work looks into the acoustic proofing properties of a non-toxic material ‘SK One Component Polyurethane’ developed by ... -
Review of Peltier and Resistive Heating Elements through Infrared Imaging
(Conference object; Konferansebidrag, 2016-12-08)The study includes the review of the heating elements to develop the fundamental understanding. The heating elements to be investigated are Peltier and Resistive types. Both have different working principles and they are used in various industrial applications for cooling and heating purposes. The Infrared (IR) wavelength is emitted by each object at a temperature above absolute zero. IR light is ... -
Active Infrared Observation for Ice Detection in Anti/De-Icing Systems for Marine Applications in Arctic Region
(Conference object; Konferansebidrag, 2016-12-08)The number of shipping operations is on the rise in the Arctic region. As a result of these increased activities, significant challenges are being encountered with respect to safety and reliability. One of the challenges is an accretion of ice. The icing on ships and offshore structures is caused by atmospheric sources and sea spray. The sea spray is the main source of icing and is generated by the ... -
Ice Detection of Pure and Saline Ice Using Infrared Signature
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-11-30)The paper shows the possible implementation of an Infrared (IR) ice detection technique. In respect of safety in marine operations, saline ice detection can be significant for automated de-icing systems. Experimentation is performed to observe and detect saline and pure ice samples. The discussed detection mechanism is unique and differs from passive IR detection by introducing the self-heating ... -
Past methane emissions in the earliest Pleistocene on Yermak Plateau, NW Svalbard.
(Master thesis; Mastergradsoppgave, 2016-05-15)Hole 912A (Ocean Drilling Program (ODP) Leg 151) drilled on the Yermak Plateau (eastern Arctic Ocean) is used to investigate past methane emissions in the earliest Pleistocene. Preliminary work showed depleted δ¹³C values at 93-96 meters below sea floor (mbsf), and an increase in methane concentration between 11, 5 and 23 mbsf. A secondary sampling focused on intervals between 10 and 23 mbsf (core ... -
Management of risks - a Paradox?
(Conference object; Konferansebidrag, 2016-11-23) -
Ice Detection Setup Using Infrared and Active Heating
(Conference object; Konferansebidrag, 2015)Considering the cold environment operations, ice accretion can occur at a rapid pace and can adversely affect the operations. In such scenario, ice detection is useful for the ice mitigation and removal upon the marine and offshore structures. Various techniques exist in the literature to detect the icing mainly utilizing its physical or electromagnetic properties. The parameters measured by these ... -
Improving Mechanical Grip of Tyres on Snow and Icy Road Surfaces using Finite Element Method
(Conference object; Konferansebidrag, 2016)Harsh winter conditions are known to be one of the most challenging environments for driving. Although the number of fatal accidents is higher during the summer compared to the winter in Norway (according to Norwegian Highways Authority), the total number of accidents is higher in the winter season. These accidents mainly happen due to loss traction on snowy or icy road surfaces. The loss of traction ... -
Solution of Pure Scattering Radiation Transport Equation using Finite Difference Method
(Conference object; Konferansebidrag, 2016-12)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 processes. Equations of radiative transfer have application in a wide variety of subjects including optics, astrophysics, atmospheric science, and remote sensing. Analytic solutions to the radiative ...
