Browsing Institutt for fysikk by Issue Date
Now showing items 341-360 of 2677
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Broadband Dispersion Measurement of ZBLAN, Germanate and Silica Fibers in MidIR
(Journal article, 2012)We report the first ultra-broad band dispersion measurements in short-length ZBLAN, germanate and silica-based optical fibers in the near- and midIR wavelength ranges between 1.7 and 2.0 μm and from 2.3 to 2.45 μm, using ... -
Cr:ZnSe Bulk and Cr:ZnSe Thin Disk cw Lasers
(Chapter, 2012)A Thulium-fiber-laser pumped Cr:ZnSe bulk cw laser with an output power of 6.5W as well as a Thulium-fiber-laser or diode-laser-stack pumped Cr:ZnSe thin disk cw laser with almost 2W of output powers will be presented. -
Biocomposites prepared by alkaline phosphatase mediated mineralization of alginate microbeads
(Journal article; Peer reviewed, 2012)This study set out to develop a biomimetic scaffold by incorporating osteoinductive hydroxyapatite (HA) particles into a porous alginate gel matrix via a cell-friendly pathway. Two types of alginate/calcium phosphate ... -
The Relative Influence of Solar Radiative and Solar Geomagnetic Variation on the Dynamics of the Polar Upper Mesosphere
(Master thesis, 2012)Resent research indicates that there might be a connection between perturbation of the Earth's geomagnetic field caused by solar wind, and the atmospheric circulation. In this project the mesospheric meridional and zonal ... -
Non-Fraunhofer Interference Pattern in Inhomogeneous Ferromagnetic Josephson Junctions
(Journal article, 2012)Generic conditions are established for producing a non-Fraunhofer response of the critical supercurrent subject to an external magnetic field in ferromagnetic Josephson junctions. Employing the quasiclassical Keldysh-Usadel ... -
X-ray Studies of Carbon Dioxide Intercalation in Na-Fluorohectorite Clay at Near-Ambient Conditions
(Journal article, 2012)We show experimentally that gaseous CO2 intercalates into the interlayer space of the synthetic smectite clay Na-fluorohectorite at conditions not too far from ambient. The mean interlayer repetition distance of the clay ... -
Continuum generation in Mid-IR from Tm-doped germanate fiber using femtosecond Cr:ZnS laser
(Chapter, 2012)The mid-IR supercontinuum generation in fibers has received much attention due to its broad applicability to high-resolution spectroscopy and trace gas analysis, frequency metrology and optical coherence tomography (OCT). ... -
Renormalised Intrinsic and Extrinsic Impurity Induced Spin-orbit Scattering in Graphene
(Master thesis, 2012)We study the effect of an impurity potential on spin-memory loss in graphene. Various general methods for finding the spin-orbit related effect of a slowly varying impurity potential on a semiconductor have been examined. ... -
Pump-probe experiments of multicrystalline silicon for solar cell applications
(Master thesis, 2012)In order to make cost effective solar cells from mc-Si materials, the negative contributions from defects and impurities should be reduced. The analysis of the photogenerated carrier properties is therefore of great ... -
System Identification of Unmanned Aerial Vehicles
(Master thesis, 2012)The least squares method has been applied to estimate parameters inan aerodynamic model of a simulated aircraft, using data that can beexpected to available from sensors on an Unmanned Aerial Vehicle. Acombination of two ... -
Structure of Clean and Oxidized PdCu(100) Surfaces at the Atomic Scale
(Master thesis, 2012)In this thesis, clean and oxidized Pd(57)Cu(43)(100) single crystal surfaces were studied by LEED, STM and XPS in UHV conditions. The clean sample annealed to 300 degrees C has been found to either consist of ordered domains ... -
Experimental Studies of Smectite Clays: Colloids and Nanoporous Materials
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:215, Doctoral thesis, 2012)This thesis presents experimental work on two synthetic clay minerals: fluorohectorite and Laponite RD. Both are hectorite clays belonging to the widely studied smectite group of clays. The results presented can broadly ... -
Actuation of a Hyperelastic PDMS Membrane Suspended inside a Microfluidic Channel: From Computer Simulation to Microfabrication
(Master thesis, 2012)This Master-project was done in the Department of Physics at NTNU in the spring of 2012. The project develops micro- and nanofabrication processes useful for lab-on-a-chip systems. These systems aim to scale down and ... -
Photoprotection of riboflavin containing beverages
(Master thesis, 2012)Riboflavin, also known as vitamin B2 and one of the most easily absorbed nutrients,can be found in many different organisms. The most abundant source of riboflavin ismilk and dairy products; however it is also present in ... -
Simulations of impact using the modified Gurson model
(Master thesis, 2012)We have performed modified Gurson model calibrations to the steel alloys Weldox 460E, Weldox 700E and Weldox 900E through finite element method (FEM) simulations of various tensile material tests performed, and used these ... -
Symmetry Breaking in ordinary and supersymmetric Models of Quantum Field Theory
(Master thesis, 2012)This thesis will consider two different theories, and apply variational techniquesto each, in order to investigate their true ground states and the possibility ofsymmetry breaking.A scalar field theory is modified by ... -
Student Response Systems in Science and Engineering Education
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:293, Doctoral thesis, 2012)This thesis explores aspects related to the use of a Student Response System (SRS) in preparatory engineering courses at Sr-Trndelag University College (HiST), Norway. The work described here started as a part of a project ... -
Relativistic Fermions in Graphene
(Master thesis, 2012)The Fermi surface of graphene contains points where the connection between excitation energy and crystal momentum is linear, similar to massless or ultrarelativistic fermions. This is important for the physical properties ... -
Correlated transmission electron microscopy and micro-photoluminescence studies of GaAs-based heterostructured semiconductor nanowires
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:319, Doctoral thesis, 2012)The focus of this work was to study the nanowire (NW) optical and structural properties on a single NW level. The GaAs-based heterostructured semiconductor NWs, grown by Au-assisted molecular beam epitaxy (MBE), were studied ... -
Nonlinear Propagation of mid-IR Femtosecond Pulses in ZBLAN Fiber
(Chapter, 2012)We demonstrate environmentally protected delivery of high-power femtosecond mid-IR pulses in a single-mode ZBLAN fiber by soliton formation. A 70-fs Cr:ZnS laser at 2.4 µm reaches this regime already at ~1.5 nJ launched ...