Browsing Institutt for fysikk by Issue Date
Now showing items 61-80 of 2655
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o-Quinonoid Heterocycles: Synthesis and Crystal Structure of 2,3-Dicyano-5,7-bismethylthieno[3,4-b]pyrazine
(Journal article; Peer reviewed, 2007)2,3-Dicyano-5,7-bismethylthieno[3,4-b]pyrazine (5), has been obtained as a minor product from reactions of S-nucleophiles with 5,6-di(1-bromoethyl)pyrazine-2,3- dicarbonitrile (3), or from a condensation of 4-hydroxy-2 ... -
Spatial-temporal structure of the femtosecond third harmonic generation in photonic-crystal fibers
(Journal article; Peer reviewed, 2007)We analyze the third harmonic generation by the supercontinuum at 1.5 µm in nonlinear-glass microstructured fibers. The numerical model includes the real field dynamics and allows analyzing the spectral as well as the ... -
Modelling of Controlled Source Electromagnetic Data
(Doktoravhandlinger ved NTNU, 1503-8181; 2007:43, Doctoral thesis, 2007)This work treats modelling of electromagnetic fields from controlled sources in geophysical applications. The focus is on modelling the marine CSEM (controlled source electromagnetic) method in planarly layered media. The ... -
Magnetic flux density measurements and mobile phone provocation studies: Investigations in the 50 Hz and the mobile phone frequency regions
(Doktoravhandlinger ved NTNU, 1503-8181; 2007:114, Doctoral thesis, 2007)The aims of this thesis work were divided into two main areas. The first area was an investigation of the extremely low frequency magnetic fields in urban environment and from electrical devices. The second area was mobile ... -
Sensitive multiplex spectroscopy in molecular fingerprint 2.4 um region with a Cr2+:ZnSe femtosecond laser
(Journal article; Peer reviewed, 2007)An ultrashort-pulse Cr2+:ZnSe laser is a novel broadband source for sensitive high resolution molecular spectroscopy. A 130-fs pulse allows covering of up to 380 cm-1 spectral domain around 2.4 µm which is analyzed ... -
Evidence for egg-box-compatible interactions in calcium-alginate gels from fiber X-ray diffraction
(Peer reviewed; Journal article, 2007)The structures of guluronic-acid-rich alginate in the acid and calcium forms were investigated using fiber X-ray diffraction. Data recorded for alginate fibers in the acid form show a repeat along the chain axis of c = ... -
Teknologi som en del av fysikkfaget i videregående skole: Utvikling og utprøving av et undervisningsopplegg om elektroniske sensorer
(Master thesis, 2008)Oppgaven tar for seg teknologiens plass i fysikkundervisningen i videregående skole. I de nye læreplanene fra Kunnskapsløftet har det kommet et nytt hovedområde Fysikk og teknologi, med fokus på moderne elektronikk. I ... -
Konstruksjon av spesialsentrifuge for simulering av lave g-nivåer
(Master thesis, 2008)Målet med denne oppgaven har vært å konstruere og teste ut en spesialsentrifuge for simulering av lave g-nivåer i biofysikkeksperimenter, nærmere bestemt månens gravitasjon. Det blir gjort rede for hvilket teoretisk grunnlag ... -
Et katapultprosjekt: hva kan det bidra med i fysikkfaget?
(Master thesis, 2008)Denne oppgaven tar for seg et undervisningsopplegg laget for å teste ut hvordan et katapultprosjekt kan bidra til elevers kunnskaper, ferdigheter og motivasjon i fysikkfaget. Norske elever har gjort det jevnt over dårligere ... -
Cr4+: YAG chirped-pulse oscillator
(Journal article; Peer reviewed, 2008)We demonstrate chirped-pulse operation of a Cr :YAG passively mode-locked laser. Different operation regimes of the laser are extensively investigated in the vicinity of zero dispersion both experimentally and numerically. ... -
Coherent and Correlated Spin Transport in Nanoscale Superconductors
(Doktoravhandlinger ved NTNU, 1503-8181; 2008:72, Doctoral thesis, 2008)Motivated by the desire for better understanding of nanoelectronic systems, we theoretically study the conductance and noise characteristics of current flow between superconductors, ferromagnets, and normal-metals. Such ... -
Nanoparticles in dilute solution:: A numerical study of rotational diffusion
(Doktoravhandlinger ved NTNU, 1503-8181; 2008:209, Doctoral thesis, 2008) -
Parametrisering av Kraftfelt for ReaxFF
(Master thesis, 2008)Denne oppgaven tar for seg innsamling av data for optimerte geometrier, energier og ladninger for molekylstrukturer av aluminium, indium (gruppe 3-atomer) og arsen (gruppe 5-atom), samt hydrogen. All informasjon er samlet ... -
In situ investigation of spinodal decomposition in hypermonotectic Al–Bi and Al–Bi–Zn alloys
(Journal article; Peer reviewed, 2008)Spinodal decomposition of hypermonotectic Al–6 wt.%Bi, Al–8 wt.%Bi and Al–6 wt.%Bi–8 wt.%Zn alloys has been investigated using synchrotron radiography. In the case of the 6 and 8 wt.%Bi binary alloys undercoolings of ... -
Theoretical Studies of Unconventional Order in Quantum Many-Particle Systems
(Doktoravhandlinger ved NTNU, 1503-8181; 2008:23, Doctoral thesis, 2008) -
Theoretical Studies of Unconventional Superconductors
(Doktoravhandlinger ved NTNU, 1503-8181; 2008:95, Doctoral thesis, 2008)This thesis presents four research papers. In the first three papers we have derived analytical results for the transport properties in unconventional superconductors and ferromagnetic systems with multiple broken symmetries. ... -
Parametrisering av kraftfelt for ReaxFF med H, C, Si og Ge
(Master thesis, 2008)Sammenligning av DFT og ReaxFF beregninger for å kunne validere gjorte beregninger som input til paramtreisering av kraftfelt i ReaXFF for C, Si og Ge. -
Influence of clouds on the spectral actinic flux density in the lower troposphere (INSPECTRO): overview of the field campaigns
(Journal article; Peer reviewed, 2008)Ultraviolet radiation is the key factor driving tropospheric photochemistry. It is strongly modulated by clouds and aerosols. A quantitative understanding of the radiation field and its effect on photochemistry is thus ... -
Investigating the importance of collagen in cancer diagnosis and drug delivery using laser-based microscopy
(Doktoravhandlinger ved NTNU, 1503-8181; 2008:125, Doctoral thesis, 2008) -
Modelling of a Solar Stove: Small Scale Concentrating System With Heat Storage: Potential For Cooking In Rural Areas, Zimbabwe
(Doktoravhandlinger ved NTNU, 1503-8181; 2008:36, Doctoral thesis, 2008)The central objective of the present research is to serve as an in-depth technical introduction to small-scale concentrating systems tailored for application especially in rural areas in Africa located outside the national ...