Browsing Faculty of Mathematics and Natural Sciences by Title
Now showing items 1662-1681 of 10003
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Deanonymizing communications on The Onion Router (TOR) network with Deep Learning
(Master thesis, 2021-06-01)Staying anonymous on the Internet is becoming increasingly difficult. Advertisements for services that to some extent offer privacy are frequent, and the general population seems to be more aware of privacy than previously. ... -
Decadal Changes in Ventilation and Anthropogenic Carbon in the Nordic Seas
(Journal article; Peer reviewed, 2023)We evaluate the decadal evolution of ventilation and anthropogenic carbon (Cant) in the Nordic Seas between 1982 and the 2010s. Ventilation changes on decadal timescale are identified by evaluating decadal changes in mean ... -
Decadal Predictability of the North Atlantic Eddy-Driven Jet in Winter
(Journal article; Peer reviewed, 2023)This paper expands on work showing that the winter North Atlantic Oscillation (NAO) is predictable on decadal timescales to quantify the skill in capturing the North Atlantic eddy-driven jet's location and speed. By focusing ... -
Decadal prediction of Sahel rainfall: where does the skill (or lack thereof) come from?
(Peer reviewed; Journal article, 2016-12)Previous works suggest decadal predictions of Sahel rainfall could be skillful. However, the sources of such skill are still under debate. In addition, previous results are based on short validation periods (i.e. less than ... -
Decadal solar irradiance variability in northern Europe
(Doctoral thesis, 2014-11-28)Shortwave (SW) radiation from the Sun is the external energy source on Earth and the fundamental input of energy into the climate system. Variations of the SW radiation and its transfer through the atmosphere can have ... -
Decadal trends in ocean acidification from the Ocean Weather Station M in the Norwegian Sea
(Journal article; Peer reviewed, 2022)The Ocean Weather Station M (OWSM) is situated at a fixed position in the Norwegian Sea, one of the major basins of the Nordic Seas, which represents an important area for uptake of atmospheric CO2 as well as deep water ... -
Decadal Trends in the Oceanic Storage of Anthropogenic Carbon From 1994 to 2014
(Journal article; Peer reviewed, 2023)The oceanic uptake and resulting storage of the anthropogenic CO2 (Cant) that humans have emitted into the atmosphere moderates climate change. Yet our knowledge about how this uptake and storage has progressed in time ... -
Decadal Variability and Trends of Atlantic Water and Adjacent Water Masses Along the Continental Slope West and North of Svalbard
(Master thesis, 2024-06-03)In recent decades, the temperature of the West Spitsbergen Current north of Svalbard has risen substantially, with major implications for the Arctic Ocean and the Arctic sea ice cover. However, our understanding of long- term ... -
Decay estimates of Green's matrices for discrete-time linear periodic systems
(Journal article; Peer reviewed, 2023)We study periodic Lyapunov matrix equations for a general discrete-time linear periodic system Bpxp−Apxp−1=fp, where the matrix coefficients Bp and Ap can be singular. The block coefficients of the inverse operator of the ... -
Decay of solitary waves of fractional Korteweg-de Vries type equations
(Journal article; Peer reviewed, 2023)We study the solitary waves of fractional Korteweg-de Vries type equations, that are related to the 1- dimensional semi-linear fractional equations: |D|αu + u − f (u) = 0, with α ∈ (0, 2), a prescribed coefficient p∗(α), ... -
Deciding EA-equivalence via invariants
(Journal article; Peer reviewed, 2022)We define a family of efficiently computable invariants for (n,m)-functions under EA-equivalence, and observe that, unlike the known invariants such as the differential spectrum, algebraic degree, and extended Walsh spectrum, ... -
Deciphering Spatio-Temporal Variations in the Auroral Ionosphere using Magnetometer Data
(Doctoral thesis, 2024-03-22)Den polare ionosfæren er et dynamisk plasma-miljø dominert av koblingen mellom solvinden og jordens magnetosfære. Nordlyset, plasma-bevegelsen og elektriske strømmer i ionosfæren er skalert og drevet av dagsidekoblingen ... -
Deciphering the metamorphic framework of ophiolite alteration and devolatilization at Linnajarvi, N-Norway
(Master thesis, 2021-12-01)Kvitfjell ultramafic body is one of around 20 ultramafic bodies found in the Linnajavri area of Northern Norway. These ultramafic fragments are situated within the Köli Nappe of the Upper Allochthon in the Caledonian ... -
Decision support framework for choosing treatment
(Master thesis, 2019-06-29)With the release of ”Fritt behandlingsvalg” in 2015, Norwegian patients got the right to select where they want to attend special treatment. As of now, there is no easy way to compare treatment centers, as the information ... -
Decision-making from the animal perspective: Bridging ecology and subjective cognition
(Journal article; Peer reviewed, 2019-05-14)Organisms have evolved to trade priorities across various needs, such as growth, survival, and reproduction. In naturally complex environments this incurs high computational costs. Models exist for several types of decisions, ... -
Decision-making in a proximate model framework: How behaviour flexibility is generated by arousal and attention
(Master thesis, 2017-08-19)Animals must make decisions based on limited information and during a limited amount of time. The time spent exploring possibilities and sampling environmental information, means less time spent at actually gathering and ... -
Declaratively Programming the Dynamic Structure of Graphical User Interfaces
(Master thesis, 2020-06-20)Structures are everywhere around us - from chemical formulas to biological systems or musical works. In this thesis, we focus on composite structures that appear in graphical user interfaces (GUI), such as lists, tables, ... -
Decline in temperature variability on Svalbard
(Journal article; Peer reviewed, 2020)The variability in the temperature on Svalbard, Norway, has been decreasing over the last four decades. This may be due to the reduction in sea ice, transitioning the regional climate to a more stable, coastal one.We ... -
Decloud: an unsupervised deconvolution tool for building gene expression profiles
(Master thesis, 2018-05-29)Deconvolution is the process of decomposing a mixed signal into its originating elements. For my thesis I created a clustering application, named DeCloud, with the intent to replace the unsupervised clustering step in the ... -
Decoding and constructions of codes in rank and Hamming metric
(Doctoral thesis, 2022-05-27)As coding theory plays an important role in data transmission, decoding algorithms for new families of error correction codes are of great interest. This dissertation is dedicated to the decoding algorithms for new families ...