Search results for "DERIVATION"

showing 10 items of 60 documents

A class of nilpotent Lie algebras admitting a compact subgroup of automorphisms

2017

Abstract The realification of the ( 2 n + 1 ) -dimensional complex Heisenberg Lie algebra is a ( 4 n + 2 ) -dimensional real nilpotent Lie algebra with a 2-dimensional commutator ideal coinciding with the centre, and admitting the compact algebra sp ( n ) of derivations. We investigate, in general, whether a real nilpotent Lie algebra with 2-dimensional commutator ideal coinciding with the centre admits a compact Lie algebra of derivations. This also gives us the occasion to revisit a series of classic results, with the expressed aim of attracting the interest of a broader audience.

Discrete mathematicsPure mathematicsOscillator algebra010102 general mathematicsUniversal enveloping algebra010103 numerical & computational mathematics01 natural sciencesAffine Lie algebraLie conformal algebraGraded Lie algebraNilpotent Lie algebraComputational Theory and MathematicsLie algebraCompact Lie algebraSettore MAT/03 - GeometriaGeometry and Topology0101 mathematicsCompact derivationGeneralized Kac–Moody algebraAnalysisMathematicsDifferential Geometry and its Applications
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A privacy enhanced device access protocol for an IoT context

2013

In this paper, we present the case for a device authentication protocol that authenticates a device/service class rather than an individual device. The devices in question are providing services available to the public. The proposed protocol is an online protocol, and it uses a pseudo-random temporary identity scheme to provide user privacy. This allows the Internet-of-Things device to have full assurance of the user, with respect to the request service, while permitting the user to remain anonymous with respect to the device. The user can then enjoy identity and location privacy in addition to untraceability with respect to device access. Copyright © 2013 John Wiley & Sons, Ltd.

Service (business)Challenge-Handshake Authentication ProtocolAuthenticationComputer Networks and CommunicationsComputer science020206 networking & telecommunicationsContext (language use)02 engineering and technologyComputer securitycomputer.software_genreAuthentication protocol0202 electrical engineering electronic engineering information engineeringIdentity (object-oriented programming)020201 artificial intelligence & image processingKey derivation functionProtocol (object-oriented programming)computerInformation SystemsSecurity and Communication Networks
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The Syllogistic with Unity

2011

We extend the language of the classical syllogisms with the sentence-forms “At most 1 p is a q” and “More than 1 p is a q”. We show that the resulting logic does not admit a finite set of syllogism-like rules whose associated derivation relation is sound and complete, even when reductio ad absurdum is allowed.

logic and natural languageFOS: Computer and information sciencesPure mathematicsComputer Science - Logic in Computer Sciencecomputational complexityComputational complexity theoryComputational logicSyllogismMathematics - Logicproof theorysyllogismsDerivation relationLogic in Computer Science (cs.LO)Reductio ad absurdumPhilosophyPhilosophy of logicProof theoryCalculusFOS: MathematicsF.4.0Logic (math.LO)Finite setMathematics03B65
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Dynamics of morphological processing in pre-school children with and without familial risk for dyslexia

2020

Difficulties in phonological processing and speech perception are associated with developmental dyslexia, but there is considerable diversity across people with developmental dyslexia (e.g., dyslexics with and without phonological difficulties). Phonological and morphological awareness are both known to play an important role in reading acquisition. Problems in morpho-phonological information processing could arguably be associated with developmental dyslexia, especially for Finnish, which is a rich morphologically language. We used MEG to study the connection between morpho-phonology in the Finnish language and familial risk for developmental dyslexia. We measured event-related fields (ERF…

magnetoencephalographyMEGreading acquisitionjohdokset (kielitiede)derivational morphologypre-school childrenmuoto-oppi (kielitiede)behavioral disciplines and activitiesneurolingvistiikkaphonologykielellinen kehitysesikouluikäisetfamilial risk for developmental dyslexialukihäiriötkielen oppiminenfonologia
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Derivation in Finnish upper secondary school English L2 textbooks

2016

Sananmuodostus on keskeinen taito kielten oppijalle; se auttaa paitsi sanavaraston laajentamisessa, myös edistää oppijan lukutaitoa vieraskielistä tekstiä lukiessa. Tästä syystä on tärkeää tarkastella, kuinka sananmuodostusta opetetaan viimeistään toisen asteen opetuksessa, esimerkiksi lukiossa. Tässä tutkimuksessa tarkastelukeinoksi valikoitui lukiotason oppikirjojen tutkiminen, koska erityisesti kielten opetuksessa oppikirjoilla on todella suuri rooli opetuksen sisältöjä ja muotoa koskevia valintoja tehtäessä. Tavoitteena oli selvittää, kuinka lukiotason oppikirjoissa opetetaan sananmuodostamisen tuottoisinta osa-aluetta, sananjohtamista, ja erityisesti millaisia sitä käsitteleviä harjoit…

sisällönanalyysicontent analysisoppikirjatsananmuodostustextbooksderivationlukiokielen oppiminenenglannin kieli
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L2 English vocabulary breadth and knowledge of derivational morphology : One or two constructs?

2022

Derivational morphology (DM) and how it can be assessed have been investigated relatively rarely in language learning and testing research. The goal of this study is to add to the understanding of the nature of DM knowledge, exploring whether and how it is separable from vocabulary breadth. Eight L2 (second or foreign language) English DM knowledge measures and three measures of the size of the English vocabulary were administered to 120 learners. We conducted two confirmatory factor analyses, one with one underlying factor and the other treating vocabulary breadth and DM as separate. As neither model had a satisfactory fit without introducing a residual covariance to the two-factor model,…

Linguistics and Languagederivational morphologyfactor analysismuoto-oppi (kielitiede)Language and LinguisticsconstructsfaktorianalyysiEnglish as a foreign languagesanavarastokielen oppiminenenglannin kieliSocial Sciences (miscellaneous)vieraat kieletvocabulary
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Warczeć, zipać, krzyczeć - czasowniki nie tylko dźwiękonaśladowcze i ich potencjał słowotwórczy

2018

The article is a tentative analysis of the word-forming potential for Polish not only onomatopoeic verbs. As the input material for analysis, the author selected 84 word-forming nests of verbs, taken from Słownik gniazd słowotwórczych współczesnego języka ogólnopolskiego (Kraków 2004). The selected verbs are the base for nouns, verbs, adjectives, adverbs. The derived nouns and verbs were divided into 23 semantic classes. The analysis of word-forming paradigms showed that onomatopoeic verbs quite regularly will derive verbs accentuating the beginning or the end of the action; verbs expressing intensity or weakening of the action; verbs naming reactions; there will also be nouns as names of a…

word-forming chainverbPolishword-forming nestderivationword-forming paradigmonomatopoeiaStudia et Documenta Slavica
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Generality of Henstock-Kurzweil type integral on a compact zero-dimensional metric space

2011

ABSTRACT A Henstock-Kurzweil type integral on a compact zero-dimensional metric space is investigated. It is compared with two Perron type integrals. It is also proved that it covers the Lebesgue integral.

General MathematicsInjective metric spaceMathematical analysisLebesgue's number lemmaHenstock-kurzweil integral Perron integral derivation basisRiemann–Stieltjes integralRiemann integralLebesgue integrationVolume integralsymbols.namesakeDifferentiation of integralsSettore MAT/05 - Analisi MatematicasymbolsDaniell integralMathematics
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Unbounded derivations and *-automorphisms groups of Banach quasi *-algebras

2018

This paper is devoted to the study of unbounded derivations on Banach quasi *-algebras with a particular emphasis to the case when they are infinitesimal generators of one parameter automorphisms groups. Both of them, derivations and automorphisms are considered in a weak sense; i.e., with the use of a certain families of bounded sesquilinear forms. Conditions for a weak *-derivation to be the generator of a *-automorphisms group are given.

Unbounded derivationPure mathematicsAutomorphisms groups and their infinitesimal generatorsInfinitesimalBanach quasi *-algebra01 natural sciencesMathematics::Group Theory*-Automorphisms groups and their infinitesimal generatorSettore MAT/05 - Analisi Matematica0103 physical sciencesFOS: MathematicsAutomorphisms groups and their infinitesimal generators; Banach quasi; Integrability of derivation; Unbounded derivations; Automorphisms groups and their infinitesimal generators; Banach quasi; Integrability of derivation; Unbounded derivationsBanach quasi0101 mathematicsOperator Algebras (math.OA)MathematicsGroup (mathematics)Applied Mathematics010102 general mathematicsIntegrability of derivationMathematics - Operator AlgebrasAutomorphismUnbounded derivationsFunctional Analysis (math.FA)Mathematics - Functional AnalysisBounded function010307 mathematical physicsGenerator (mathematics)
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An Original Risk Score to Predict Early Major Bleeding in Acute Pulmonary Embolism

2021

Background Improved prediction of the risk of early major bleeding in pulmonary embolism (PE) is needed to optimize acute management. Research Question Does a simple scoring system predict early major bleeding in acute PE patients, identifying patients with either high or low probability of early major bleeding? Study Design and Methods From a multicenter prospective registry including 2,754 patients, we performed post hoc multivariable logistic regression analysis to build a risk score to predict early (up to hospital discharge) major bleeding events. We validated the endpoint model internally, using bootstrapping in the derivation dataset by sampling with replacement for 500 iterations. P…

Pulmonary and Respiratory Medicinemedicine.medical_specialtyFramingham Risk ScoreAnemiabusiness.industryBleedCritical Care and Intensive Care Medicinemedicine.diseaseLogistic regressionPulmonary embolismBrier scoreInternal medicinemedicineDerivationCardiology and Cardiovascular MedicinebusinessMajor bleedingChest
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