Browsing Institutt for matematiske fag by Subject "Industriell matematikk"
Now showing items 21-40 of 210
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Analysis of the Transport Layer Security protocol
(Master thesis, 2010)In this master thesis we have presented a security analysis of the TLS protocol with particular emphasis on the recently discovered renegotiation attack. From our security proof we get that the Handshake protocol with ... -
Anonymity in Network Connections for Mobile Communication
(Master thesis, 2012)This thesis summarizes an existing protocol, that we have chosen to call the Token Key Agreement protocol. It then goes on to introduce two new protocols we have chosen to name the Symmetric Key Agreement protocol and the ... -
Application of the wavelet transform for analysis of ultrasound images
(Master thesis, 2008)In this master thesis we analyse medical ultrasound images using the wavelet transform. Mathematical theory is introduced for both one-dimensional and two-dimensional functions. Three edge detectors based on the mathematical ... -
Applications of p-adic Numbers to well understood Quantum Mechanics: With a focus on Weyl Systems and the Harmonic Oscillator
(Master thesis, 2012)In this thesis we look at how it is possible to construct models in quantum mechanics by using p-adic numbers. First we look closely at different quantum mechanical models using the real numbers, as it is necessary to ... -
Applications of splitting Methods and exponential Integrators to an electro-chemical Heart Cell Model
(Master thesis, 2007)In this thesis we discuss how a system of ordinary differential equations (ODE) describing electro-chemical processes in a heart cell can be solved by numerical methods. The system is stiff, and explicit numerical solvers ... -
Applying hybrid methods to reduce nonphysical cycles in the flux field
(Master thesis, 2012)In this thesis we present the theoretical background for the two-point flux-approximation method; (TPFA), mimetic discretisation methods, and the multipoint flux approximation method; (MPFA). Theoretical arguments concerning ... -
Approximate recursive calculations of discrete Markov random fields
(Master thesis, 2010)In this thesis we present an approximate recursive algorithm for calculations of discrete Markov random fields defined on graphs. We write the probability distribution of a Markov random field as a function of interaction ... -
Aspects of Applying the ACER Method to Ocean Wave Data
(Master thesis, 2010)This thesis gives a presentation of the classical Peaks Over Threshold (POT) method and the recently developed Average Conditional Exceedence Rates (ACER) method. Real life ocean significant wave height data sets, each ... -
Aspects of first and second order cellular automata
(Master thesis, 2010)An introduction to the field of Higher-Order Cellular Automata (HOCA) is provided. Key concepts are defined and illustrated using examples. Some of the possibilities offered by this framework are explored, and used to take ... -
Asymptotic Approximations of Gravity Waves in Water
(Master thesis, 2009)The governing equations for waves propagating in water are derived by use of conservation laws. The equations are then cast onto dimensionless form and two important parameters are obtained. Approximations by use of ... -
Automatic Parametrisation and Block pseudo Likelihood Estimation for binary Markov random Fields
(Master thesis, 2008)Discrete Markov random fields play an important role in spatial statistics, and are applied in many different areas. Models which consider only pairwise interaction between sites such as the Ising model often perform well ... -
Bandwidth Selection in Kernel Density Estimation
(Master thesis, 2010)In kernel density estimation, the most crucial step is to select a proper bandwidth (smoothing parameter). There are two conceptually different approaches to this problem: a subjective and an objective approach. In this ... -
Bandwith selection based on a special choice of the kernel
(Master thesis, 2007)We investigate methods of bandwidth selection in kernel density estimation for a wide range of kernels, both conventional and non-conventional. -
Bayesian 4D inversion: integrating time-shift information
(Master thesis, 2006)A new inversion method for time-lapse seismic data is developed. The method is based on the 3-dimensional spatially coupled AVO inversion in the Fourier domain, describedin Buland et al. (2003b). Further, a technique for ... -
Bayesian Inversion of Well Log Data into Facies Units based on a Spatially Coupled Model
(Master thesis, 2006)Through a study of cored wells from the Statfjord Formation in the Tampen Area, we derive a spatially coupled classification model for facies units. We consider a Bayesian framework for the problem. A likelihood model is ... -
Bayesian Seismic Lithology/Fluid Inversion Constrained by Rock Physics Depth Trends
(Master thesis, 2008)In this study we consider 2D seismic lithology/fluid inversion constrained by rock physics depth trends and a prior lithology/fluid Markov random field. A stochastic relation from porosity and lithology/fluid to seismic ... -
Bayesian Text Categorization
(Master thesis, 2007)Natural language processing is an interdisciplinary field of research which studies the problems and possibilities of automated generation and understanding of natural human languages. Text categorization is a central ... -
Bayesianske metodar relevant for jernbanevedlikehald
(Master thesis, 2008)Jernbaneverket ønskjer å utnytte ressursane dei har til vedlikehald best mogleg. Systematisering og lagring av data om svikt og tilstand på dei utallege komponentane som utgjer det norske jernbanenettet i databasen BaneData ... -
Bayesianske nettverk kontra Monte Carlo simulering for estimering av produksjonsregularitet
(Master thesis, 2009)Denne masteroppgaven omhandler hvordan Bayesianske nettverk og Monte Carlo simulering kan bli brukt til å estimere produksjonsregulariteten til et system. De to metodene blir også sammenlignet med hverandre. Sammenligningen ... -
Betydning av feilspesifisert underliggende hasard for estimering av regresjonskoeffisienter og avhengighet i frailty-modeller
(Master thesis, 2007)Med levetidsdata for et stort antall familier kan man bruke frailty-modeller til å finne risikofaktorer og avhengighet innad i familien. En måte å gjøre dette på er å anta en realistisk fordeling for frailty-variabelen og ...