Results 21 to 30 of about 4,414,858 (168)

Hyers-Ulam stability of first-order homogeneous linear dynamic equations on time scales

open access: yesDemonstratio Mathematica, 2018
We establish theHyers-Ulam stability (HUS) of certain first-order linear constant coefficient dynamic equations on time scales, which include the continuous (step size zero) and the discrete (step size constant and nonzero) dynamic equations as important
Anderson Douglas R., Onitsuka Masakazu
doaj   +1 more source

A systematic review of the effectiveness of patient‐initiated follow‐up after cancer

open access: yesCancer Medicine, 2023
Background The traditional cancer follow‐up (FU) model for cancer survivors is by scheduled clinic appointments; however, this is not tailored to patient needs and is becoming unsustainable.
Janine Dretzke   +6 more
doaj   +1 more source

Methanolic and Aqueous Extracts of Corn Silk as Corrosion Inhibitor for Mild Steel in Hydrochloric Acid at Different Temperatures

open access: yesJournal of Applied Sciences and Environmental Management, 2018
This research work presents a study on the methanolic and aqueous extracts of corn silk for their corrosion inhibitive effect on mild steel in 0.5M HCl media at 303K, 313K and 323K using the weight loss method.
E. Ayah, K. Orubite-Okorosaye, AO James
doaj   +1 more source

On first-order topological queries [PDF]

open access: yesACM Transactions on Computational Logic, 2002
One important class of spatial database queries is the class of topological queries , that is, queries invariant under homeomorphisms. We study topological queries expressible in the standard query language on spatial databases, first-order logic with various amounts of arithmetic.
Grohe, Martin, Segoufin, Luc
openaire   +2 more sources

Hyers-Ulam-Rassias Stability for a First Order Functional Differential Equation

open access: yesJournal of Mathematical and Fundamental Sciences, 2015
In this paper, by using the fixed point method, we prove two new results on the Hyers-Ulam-Rassias and the Hyers-Ulam stability for the first order delay differential equation of the form y′(t) = F(t, y(t), y(t −τ )).
Cemil Tunç, Emel Biçer
doaj   +1 more source

Effect of pretreatment with pentanol for dyeing wool fibers at low temperature [PDF]

open access: yesActa Periodica Technologica, 2023
This paper describes the influence of pre-treatment with pentanol for the dyeing of wool fibers at low temperatures. Wool fiber is expensive to produce and process; accordingly, it must be economically viable and meet consumer demands. Acid dyes
Nikodijević Milena M.   +1 more
doaj   +1 more source

Tree-width for first order formulae [PDF]

open access: yesLogical Methods in Computer Science, 2012
We introduce tree-width for first order formulae \phi, fotw(\phi). We show that computing fotw is fixed-parameter tractable with parameter fotw. Moreover, we show that on classes of formulae of bounded fotw, model checking is fixed parameter tractable ...
Isolde Adler, Mark Weyer
doaj   +1 more source

First Order Alternation

open access: yesCoRR, 2018
We introduce first order alternating automata, a generalization of boolean alternating automata, in which transition rules are described by multisorted first order formulae, with states and internal variables given by uninterpreted predicate terms. The model is closed under union, intersection and complement, and its emptiness problem is undecidable ...
Radu Iosif, Xiao Xu
openaire   +2 more sources

Kinetics of K release from soils of Brazilian coffee regions: effect of organic acids Cinética de liberação do potássio em solos de regiões cafeeiras: efeito de ácidos orgânicos

open access: yesRevista Brasileira de Ciência do Solo, 2008
Kinetic studies on soil potassium release can contribute to a better understanding of K availability to plants. This study was conducted to evaluate K release rates from the whole soil, clay, silt, and sand fractions of B-horizon samples of a basalt ...
Vladimir Antônio Silva   +5 more
doaj   +1 more source

First-order reasoning for higher-order concurrency [PDF]

open access: yesComputer Languages, Systems & Structures, 2012
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
HENNESSY, MATTHEW, KOUTAVAS, VASILEIOS
openaire   +4 more sources

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