Browsing Institutt for matematiske fag by Title
Now showing items 242-261 of 2434
-
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 ... -
Assessing comorbidity and correlates of wasting and stunting among children in Somalia using cross-sectional household surveys: 2007 to 2010
(Journal article; Peer reviewed, 2016)Objective: Wasting and stunting may occur together at the individual child level; however, their shared geographic distribution and correlates remain unexplored. Understanding shared and separate correlates may inform ... -
Assessing gene-environment interaction effects of FTO, MC4R and lifestyle factors on obesity using an extreme phenotype sampling design: Results from the HUNT study
(Journal article; Peer reviewed, 2017)Background Our aim was to assess the influence of age, gender and lifestyle factors on the effect of the obesity-promoting alleles of FTO and MCR4. Methods The HUNT study comprises health information on the ... -
Assessing short-term risk of ischemic stroke in relation to all prescribed medications
(Peer reviewed; Journal article, 2021)We examined the short-term risk of stroke associated with drugs prescribed in Norway or Sweden in a comprehensive, hypothesis-free manner using comprehensive nation-wide data. We identified 27,680 and 92,561 cases with a ... -
Assessing some aspects of factor screening with nonnormal responses
(Journal article; Peer reviewed, 2019)Nonnormally distributed response values, such as count data for instance, create challenges for factor screening. One problem is that variances may vary from run to run. Another is the choice of screening design for such ... -
Assessing the value of seismic monitoring of CO2 storage using simulations and statistical analysis
(Peer reviewed; Journal article, 2021)Successful storage of CO2 in underground aquifers requires robust monitoring schemes for detecting potential leakage. To aid in this challenge we propose to use statistical approaches to gauge the value of seismic monitoring ... -
Assosiasjon mellom posisjonsinformasjon og peilinger fra en satellitt over nordområdene
(Master thesis, 2012)Forsvarets forskningsinstitutt (FFI) har ønske om å utvide eksisterende satellittovervåking av nordområdene fra kun posisjonsinformasjon mottatt via ''Automatisk indentifikasjonssystem'' (AIS) til å også inkludere ... -
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 ... -
Asymptotic behavior of Ext for pairs of modules of large complexity over graded complete intersections
(Journal article; Peer reviewed, 2022) -
At which spatial and temporal scales can fungi indicate habitat connectivity?
(Journal article; Peer reviewed, 2018)Isolation of habitats in space and time affects species globally and in a multitude of ecosystems. It is however often difficult to assess the level of isolation from the point of view of the focal species. Indicator species ... -
Atomic decompositions, two stars theorems, and distances for the Bourgain–Brezis–Mironescu space and other big spaces
(Peer reviewed; Journal article, 2020)Given a Banach space E with a supremum-type norm induced by a collection of operators, we prove that E is a dual space and provide an atomic decomposition of its predual. We apply this result, and some results obtained ... -
Attacks on the Basic cMix Design: On the Necessity of Commitments and Randomized Partial Checking
(Journal article; Peer reviewed, 2017)The cMix scheme was proposed by Chaum et al. in 2016 as the first practical set of cryptographic protocols that offer sender-recipient unlinkability at scale. The claim was that the cMix is secure unless all nodes collude. ... -
Auslander's formula and correspondence for exact categories
(Peer reviewed; Journal article, 2022)The Auslander correspondence is a fundamental result in Auslander-Reiten theory. In this paper we introduce the category of admissibly finitely presented functors and use it to give a version of Auslander correspondence ... -
Auslander-Gorenstein algebras and precluster tilting
(Journal article; Peer reviewed, 2018)We generalize the notions of n-cluster tilting subcategories and τselfinjective algebras into n-precluster tilting subcategories and τn-selfinjective algebras, where we show that a subcategory naturally associated to ... -
Auslander-Reiten components containing modules of finite complexity
(Master thesis, 2011)Let R be a connected selfinjective Artin algebra. We prove that any almost split sequence ending at an Omega-perfect R-module of finite complexity has at most four non-projective summands in a chosen decomposition of the ... -
Auslander–Reiten Triangles and Grothendieck Groups of Triangulated Categories
(Peer reviewed; Journal article, 2021)We prove that if the Auslander–Reiten triangles generate the relations for the Grothendieck group of a Hom-finite Krull–Schmidt triangulated category with a (co)generator, then the category has only finitely many isomorphism ... -
Authenticated Key Exchange and Signatures with Tight Security in the Standard Model
(Peer reviewed; Journal article, 2021)We construct the first authenticated key exchange protocols that achieve tight security in the standard model. Previous works either relied on techniques that seem to inherently require a random oracle, or achieved only ... -
Automatic Differentiation in Julia with Applications to Numerical Solution of PDEs
(Master thesis, 2019)Denne masteroppgaven gir en introduksjon til automatisk derivasjon (AD) og hvordan det kan benyttes til å beregne den deriverte til hvilken som helst funksjon, med samme presisjon som et analytisk uttrykk, men uten å innføre ... -
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 ... -
Automorphisms of C<sup>k</sup>with an invariant non-recurrent attracting Fatou component biholomorphic to C×(C∗)<sup>k-1</sup>
(Journal article; Peer reviewed, 2021)