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Browsing Doktorsritgerðir- HÍ by Department "Raunvísindadeild (HÍ)"
Now showing items 21-40 of 67
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(University of Iceland, School of Engineering and Natural Sciences, Faculty of Physical Sciences, 2017-01)Lake Victoria is of immense ecological and socio-economic significance for the riparian communities. However, the lake is faced with human induced pressures such as overfishing, introduction of alien species, increased eutrophication and climate change ... -
(2017)Silicon is a semiconductor material used in most power devices and the Si metal-oxide-semiconductor field effect transistor (MOSFET) is the key switching device for high power applications. Recently silicon carbide (SiC) MOSFETs have emerged on the ...
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(University of Iceland, Faculty of Physical Science, School of Engineering and Natural Sciences, 2024-11-29)The world population is rising dramatically over the next 80 years, potentially reached to 11 billion people before stabilizing at the end of the century. This population growth will need higher food production, which can be accomplished more efficiently ...
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(University of Iceland, School of Engineering and Natural Sciences, Faculty of Physical Sciences, 2021)The aim of this work is to explore the role of electronegativity and the electron power absorption mechanism in electronegative capacitively coupled oxygen and chlorine discharges. The fundamental mechanisms underlying the electron heating and the ...
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(University of Iceland, School of Engineering and Natural Sciences, Faculty of Physical Sciences, 2022-06-22)Iron-sulfur clusters are integral to the biochemistry of living organisms and a lot of effort has been devoted to research their structure and function. However, describing these polynuclear iron-sulfur clusters with computa tional chemistry poses a ...
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(University of Iceland, School of Engineering and Natural Sciences, Faculty of Physical Sciences, 2024-02-21)Encoding data with magnetic states is currently used in various devices for data transmission, storage, and processing. The operating principle in these devices is often based on controlled switching, e.g., using a pulse of an external magnetic field, ...
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(University of Iceland, School of Engineering and Natural Sciences, Faculty of Physical Sciences, 2020-11)In recent years, the study of entanglement properties of quantum field theories has led to deep insights in fields as diverse as quantum gravity and condensed matter physics. Originating as effective field theories for certain quantum dimer models, the ...
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(Aalto University, Helsinki;University of Iceland, Reykjavik, 2016)A polymer escaping from a confining external potential represents a generic description of long macromolecules crossing an energy barrier. This type of barrier crossing problems are typical in nano- and microscale polymeric systems, where the polymers ...
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(University of Iceland, School of Engineering and Natural Sciences, Faculty of Physical Sciences, 2019-07)In the early Universe, most of the cold neutral gas that will later form into individual stars and galaxies is practically invisible to us. These neutral gas reservoirs can, however, be illuminated by bright cosmic lightsources such as gamma-ray bursts ...
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High power impulse magnetron sputtering of tungsten and zirconium: An ionization region model study (University of Iceland, School of Engineering and Natural Sciences, Faculty of Physical Sciences, 2025-03)The plasma dynamics of high power impulse magnetron sputtering (HiPIMS) discharges with a tungsten and zirconium targets are studied by applying the ionization region model (IRM). The IRM effectively captures the temporal variations of the species ...
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(University of Iceland, School of Engineering and Natural Sciences, Faculty of Physical Sciences, 2024-06)The ΛCDM model is the most widely accepted model of cosmological structure formation and evolution. It includes a form of Cold Dark Matter (CDM), which is non-quantum, nonrelativistic and collisionless. It settles into extended and dense self-gravitating ...
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(University of Iceland, School of Engineering and Natural Sciences, Faculty of Physical Sciences, 2019-12-12)Permalloy Ni80Fe20 at. % (Py) is a well-known ferromagnet utilized in anisotropic magnetoresistance and planar Hall effect sensors as well as magnetic read heads in magnetic memories. These applications rely on the uniaxial magnetic anisotropy in ...
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(University of Iceland, School of Engineering and Natural Sciences, Faculty of Physical Sciences, 2025-01)The present thesis is devoted to a theoretical analysis of optical excitonic response and magnetic lattice dynamics in two-dimensional materials, in particular monolayers of CrI3 . Combining the results of DFT and Bethe-Salpeter simulations ...
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(Jens Guðmundur Hjörleifsson, 2018-06-06)Protein quaternary structures are fundament for life. Proteins have evolved towards large assemblies of subunits needed for the execution of complex chemistry, for building structural components or for compartmentalization. Most oligomeric enzymes ...
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(University of Iceland, School of Engineering and Natural Sciences, Faculty of Physical Sciences, 2020-06)Age and length (i.e. composition) data are, along with abundance indices, some of the most basic yet informative data collected in fisheries science. Measurements on age and length have been collected since the study of fish and fish stocks began in ...
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(University of Iceland, School of Engineering and Natural Sciences, Faculty of Physical Sciences, 2020-10)Life on earth is found everywhere where water is found, meaning that life has adapted to extremely varied environments. Thus, protein structures must adapt to a myriad of environmental stressors while maintaining their functional forms. In the case ...
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(University of Iceland, School of Engineering and Natural Sciences, Faculty of Physical Sciences, 2023-06-29)The focused electron beam-induced deposition (FEBID) process, a 3D nanofabrication technique, involves the utilization of a concentrated electron beam of high energy to dissociate precursor molecules that are adsorbed on a substrate, resulting in the ...
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(2022-06-16)The interaction of low-energy electrons (LEEs) with neutral molecules plays an important role in various applications. In focused electron beam induced deposition (FEBID), a direct-write 3D nanofabrication technique, a high-energy focused electron beam ...
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(University of Iceland, School of Engineering and Natural Sciences, Faculty of Physical Sciences, 2017-10-27)Focused electron beam induced deposition (FEBID) is a nanofabrication technique wherein electron-induced reactions are used to deposit pure metals from organometallic precursors under the area of a primary electron beam. It can be used to directly ...
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(University of Iceland, School of Engineering and Natural Sciences, Faculty of Physical Sciences, 2017-12-15)Focused electron beam induced deposition (FEBID) is a direct-write 3D nanofabrication technique, which works on the principle of electron-induced molecular decomposition. In FEBID, a high-energy focused electron beam dissociates the precursor molecules ...
Now showing items 21-40 of 67