Browsing Institutt for matematiske fag by Title
Now showing items 2257-2276 of 2363
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Twenty-three unsolved problems in hydrology (UPH) – a community perspective
(Journal article; Peer reviewed, 2019)This paper is the outcome of a community initiative to identify major unsolved scientific problems in hydrology motivated by a need for stronger harmonisation of research efforts. The procedure involved a public consultation ... -
TWG1: Transitions to, across and from University Mathematics
(Journal article; Peer reviewed, 2023) -
Twisted Convolution Algebras and Applications to Gabor Analysis
(Doctoral theses at NTNU;2021:155, Doctoral thesis, 2021)This thesis concerns several aspects of twisted convolution algebras, with a particular focus on problems arising in Gabor analysis. A significant portion of the thesis is dedicated to the study of Hilbert C -modules known ... -
Two classes of quadratic vector fields for which the Kahan discretization is integrable
(Journal article, 2016) -
Two results in Harmonic analysis and PDEs
(Doktoravhandlinger ved NTNU, 1503-8181; 2014:170, Doctoral thesis, 2014) -
Two types of Rubio de Francia operators on Triebel-Lizorkin and Besov spaces
(Peer reviewed; Journal article, 2018)We discuss generalizations of Rubio de Francia’s inequality for Triebel–Lizorkin and Besov spaces, continuing the research from Osipov (Sb Math 205(7): 1004–1023, 2014) and answering Havin’s question to one of the authors. ... -
Two Weight Discrete Hilbert Transforms and Systems of Reproducing Kernels
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:124, Doctoral thesis, 2011)The Hilbert transform has become increasingly popular over the years due to its wide ranging applications not only in mathematics, but also in many other applied areas. In a quest for more applications, studying various ... -
Two-dimensional simulation methods for offshore wind turbines
(Doctoral thesis at NTNU;2015:131, Doctoral thesis, 2015) -
Two-sided p-values for a non-symmetric distribution of test statistics
(Bachelor thesis, 2022)I denne oppgaven undersøkes ulike måter å beregne p-verdier for en tosidig hypotesetest hvor testobservatoren har en usymmetrisk sannsynlighetsfordeling. Først gis en kort introduksjon til statistiske begreper før Fishers ... -
Two-variable fibrations, factorisation systems and -categories of spans
(Peer reviewed; Journal article, 2023)We prove a universal property for ∞-categories of spans in the generality of Barwick’s adequate triples, explicitly describe the cocartesian fibration corresponding to the span functor, and show that the latter restricts ... -
Unbounded HIBE with Tight Security
(Peer reviewed; Journal article, 2020)We propose the first tightly secure and unbounded hierarchical identity-based encryption (HIBE) scheme based on standard assumptions. Our main technical contribution is a novel proof strategy that allows us to tightly ... -
Uncertainty Assessment in Ensemble Kalman Filters
(Doktoravhandlinger ved NTNU, 1503-8181; 2009:246, Doctoral thesis, 2009) -
Uncertainty Measures and Transfer Learning in Active Learning for Text Classification
(Master thesis, 2019)Dyp læring har blitt et fremtredende og populært verktøy i et bredt spekter av applikasjoner som omhandler behandling av komplekse data. For å kunne trene en modell tilstrekkelig, er imidlertid dyp læring avhengig av store ... -
Uncertainty principle via variational calculus on modulation spaces
(Journal article; Peer reviewed, 2022)We approach uncertainty principles of Cowling-Price-Heis-enberg-type as a variational principle on modulation spaces. In our discussion we are naturally led to compact localization operators with symbols in modulation ... -
Uncertainty Principles in Time-Frequency Analysis – Fractals and Schrödinger Evolutions
(Doctoral theses at NTNU;2023:162, Doctoral thesis, 2023)In this thesis we study two uncertainty principles from the perspective of timefrequency analysis. The first part, to which a significant portion is dedicated, is concerned with deriving an analog in the joint time-frequency ... -
Uncertainty propagation through a point model for steady-state two-phase pipe flow
(Peer reviewed; Journal article, 2020)Uncertainty propagation is used to quantify the uncertainty in model predictions in the presence of uncertain input variables. In this study, we analyze a steady-state point-model for two-phase gas-liquid flow. We present ... -
Unconditionally Secure NIZK in the Fine-Grained Setting
(Peer reviewed; Journal article, 2022)Non-interactive zero-knowledge (NIZK) proof systems are often constructed based on cryptographic assumptions. In this paper, we propose the first unconditionally secure NIZK system in the AC0 -fine-grained setting. More ... -
Uncovering the drivers of host-associated microbiota with joint species distribution modelling
(Journal article; Peer reviewed, 2018)In addition to the processes structuring free‐living communities, host‐associated microbiota are directly or indirectly shaped by the host. Therefore, microbiota data have a hierarchical structure where samples are nested ... -
Understanding module categories through triangulated categories using Auslander-Reiten theory
(Doctoral thesis at NTNU;2016:223, Doctoral thesis, 2016) -
Understanding the Population Structure Correction Regression
(Peer reviewed; Journal article, 2022)