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1372. A comparison of three recent selection theorems

Creator:
Maniscalco, Caterina
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
variation, oscillation, modulus of variation, and selection theorem
Language:
English
Description:
We compare a recent selection theorem given by Chistyakov using the notion of modulus of variation, with a selection theorem of Schrader based on bounded oscillation and with a selection theorem of Di Piazza-Maniscalco based on bounded A , Λ-oscillation.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

1373. A comparison of three rubber dam systems in vivo - a preliminary study

Creator:
Kapitán, Martin, Suchánková Kleplová, Tereza, and Suchánek, Jakub
Format:
print, text, and regular print
Type:
model:article, article, Text, srovnávací studie, časopisecké články, práce podpořená grantem, and TEXT
Subject:
mladiství, dospělí, staří, design vybavení, ženské pohlaví, lidé, mužské pohlaví, lidé středního věku, gumové blány, and mladý dospělý
Language:
English
Description:
The aim of this study was to compare the isolation systems OptraDam® Plus and OptiDam™ with the conventional rubber dam in terms of objective and subjective parameters. The isolation systems were applied during the dental treatment of the patients. The time of preparation, placement, presence and removal were measured and the quality of isolation was evaluated. The median time of rubber dam placement was 76 s (Q1=62 s; Q3=111.25 s). The application time of OptraDam® Plus was significantly longer compared to the other systems (P ® plus. The results presented in this study could guide clinicians for choosing the most appropriate isolation system. and M. Kapitán, T. Suchánková Kleplová, J. Suchánek
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

1374. A comparison of three trapping methods used to survey forest-dwelling Coleoptera

Creator:
Hyvärinen, Esko, Kouki, Jari, and Martikainen , Petri
Type:
article, model:article, and TEXT
Subject:
Abundance distribution, beetles, biodiversity inventories, boreal forest, Coleoptera, interception traps, pitfall traps, sampling, species richness, and window traps
Language:
English
Description:
Sampling of insect communities is very challenging and for reliable interpretation of results the effects of different sampling protocols and data processing on the results need to be fully understood. We compared three different commonly used methods for sampling forest beetles, freely hanging flight-intercept (window) traps (FWT), flight-intercept traps attached to trunks (TWT) and pitfall traps placed in the ground (PFT), in Scots pine dominated boreal forests in eastern Finland. Using altogether 960 traps, forming 576 sub-samples, at 24 study sites, 59760 beetles belonging to 814 species were collected over a period of a month. All of the material was identified to species, with the exception of a few species pairs, to obtain representative data for analyses. Four partly overlapping groups were used in the analyses: (1) all, (2) saproxylic, (3) rare and (4) red-listed species. In terms of the number of species collected TWTs were the most effective for all species groups and the rarer species the species group composed of (groups 1-2-3-4) the larger were the differences between the trap types. In particular, the TWTs caught most red-listed species. However, when sample sizes were standardized FWTs and TWTs caught similar number of species of all species groups. PFTs caught fewer species of all species groups, whether the sample sizes were standardized or not. In boreal forests they seem to be unsuitable for sampling saproxylic, rare and red-listed species. However, the PFTs clearly sampled different parts of species assemblages than the window traps and can be considered as a supplementary method. The abundance distribution of saproxylic species was truncated lognormal in TWT and pooled material, whereas unclassified material failed to reveal lognormal distribution in all the trap types and pooled material. The results show that even in boreal forests sample sizes of at least thousands, preferably tens of thousands of individuals, collected by a high number of traps are needed for community level studies. Relevant ecological classification of material is also very important for reliable comparisons. Differences in the performance of trap types should be considered when designing a study, and in particular when evaluating the results.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

1375. A comparison of two fem-based methods for the solution of the nonlinear output regulation problem

Creator:
Branislav, Čelikovský, Sergej, Ruiz-León, Javier, and Orozco-Mora, Jorge
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
nonlinear output regulation, singularly perturbed equation, and gyroscope
Language:
English
Description:
The regulator equation is the fundamental equation whose solution must be found in order to solve the output regulation problem. It is a system of first-order partial differential equations (PDE) combined with an algebraic equation. The classical approach to its solution is to use the Taylor series with undetermined coefficients. In this contribution, another path is followed: the equation is solved using the finite-element method which is, nevertheless, suitable to solve PDE part only. This paper presents two methods to handle the algebraic condition: the first one is based on iterative minimization of a cost functional defined as the integral of the square of the algebraic expression to be equal to zero. The second method converts the algebraic-differential equation into a singularly perturbed system of partial differential equations only. Both methods are compared and the simulation results are presented including on-line control implementation to some practically motivated laboratory models.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

1376. A comparison on the commutative neutrix convolution of distributions and the exchange formula

Creator:
Kilicman, Adem
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
distributions, ultradistributions, delta-function, neutrix limit, neutrix product, neutrix convolution, and exchange formula
Language:
English
Description:
Let $\tilde{f}$, $\tilde{g}$ be ultradistributions in $\mathcal Z^{\prime }$ and let $\tilde{f}_n = \tilde{f} * \delta _n$ and $\tilde{g}_n = \tilde{g} * \sigma _n$ where $\lbrace \delta _n \rbrace $ is a sequence in $\mathcal Z$ which converges to the Dirac-delta function $\delta $. Then the neutrix product $\tilde{f} \diamond \tilde{g}$ is defined on the space of ultradistributions $\mathcal Z^{\prime }$ as the neutrix limit of the sequence $\lbrace {1 \over 2}(\tilde{f}_n \tilde{g} + \tilde{f} \tilde{g}_n)\rbrace $ provided the limit $\tilde{h}$ exist in the sense that \[ \mathop {\mathrm N\text{-}lim}_{n\rightarrow \infty }{1 \over 2} \langle \tilde{f}_n \tilde{g} +\tilde{f} \tilde{g}_n, \psi \rangle = \langle \tilde{h}, \psi \rangle \] for all $\psi $ in $\mathcal Z$. We also prove that the neutrix convolution product $f \mathbin {\diamondsuit \!\!\!\!*\,}g$ exist in $\mathcal D^{\prime }$, if and only if the neutrix product $\tilde{f} \diamond \tilde{g}$ exist in $\mathcal Z^{\prime }$ and the exchange formula \[ F(f \mathbin {\diamondsuit \!\!\!\!*\,}g) = \tilde{f} \diamond \tilde{g} \] is then satisfied.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

1377. A completion of $\mathbb{Z}$ is a field

Creator:
Marcos, José E.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
sequential convergence, convergence ring, and completion of a convergence ring
Language:
English
Description:
We define various ring sequential convergences on $\mathbb{Z}$ and $\mathbb{Q}$. We describe their properties and properties of their convergence completions. In particular, we define a convergence $\mathbb{L}_1$ on $\mathbb{Z}$ by means of a nonprincipal ultrafilter on the positive prime numbers such that the underlying set of the completion is the ultraproduct of the prime finite fields $\mathbb{Z}/(p)$. Further, we show that $(\mathbb{Z}, \mathbb{L}^\ast _1)$ is sequentially precompact but fails to be strongly sequentially precompact; this solves a problem posed by D. Dikranjan.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

1379. A concise review of soft glassy rheological model of cytoskeleton

Creator:
Bansod, Yogesh Deepak and Burša, Jiří
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
cytoskeleton, model, sglassy rheology, and magnetic twisting cytometry
Language:
English
Description:
A cytoskeletal network contributes significantly to intracellular regulation of mechanical stresses, cell motility and cellular mechanics. Thus, it plays a vital role in defining the mechanical behaviour of the cell. Among the wide range of models proposed for dynamic behaviour of cytoskeleton, the soft glassy rheology model has gained special attention due to the resemblance of its predictions with the mechanical data measured from experiment. The soft glassy material, theory of soft glassy rheology and experiment on cytoskeleton has been discussed, which leads to a discussion of the unique features and flaws of the model. The soft glassy rheological model provides a unique explanation of the cytoskeleton ability to deform, flow and remodel. and Obsahuje seznam literatury
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

1380. A consensus based algorithm for grounding belief formulas in internally stored perceptions

Creator:
Katarzyniak, Radosław and Pieczyńska - Kuchtiak, Agnieszka
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
symbol grounding, belief formulas, cognitive agent, consensus theory, and application
Language:
English
Description:
In this paper an original algorithm for tlie choice of a relevaiit belief formula is presented. Belief forinulas are treated as external representations of internal States of cognition directed at an ontologically existing atom object. This algorithrn is based on the idea of intentional semantics and uses soft methods based on the theory of consensus and choice.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

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