Search results for "Ada"
showing 10 items of 10244 documents
Diseño y puesta a punto de un método cefalométrico en 3D para el estudio de la población ortodóncica
2011
Introducción: La introducción de la tomografía computarizada de haz cónico (CBCT) y su aplicación clínica a la imagen craneofacial tridimensional (3D) supone una herramienta diagnóstica esencial para el clínico. Objetivos: 1-Evaluar la reproducibilidad en la localización de puntos cefalométricos pertenecientes a tejidos duros del cráneo sobre imágenes escaneadas con un equipo CBCT 2-Comprobar si los valores de diferentes mediciones de las reconstrucciones 3D del CBCT se pueden comparar a las mediciones realizadas sobre imágenes 2D de la telerradiografía lateral de cráneo y comparar también si existen diferencias entre dos tipos diferentes de software de CBCT. 3-Diseñar un método cefalométri…
Organisaation osaamisen vaikutus massadatan hyödyntämiseen
2016
Massadata on nopeasti syntyvien, suurien ja monimuotoisten datamäärien ympärille keskittynyt ilmiö. Erilaisten sensoreiden lisääntyneen määrän myötä dataa saadaan nykyään entistä suurempia määriä. Massadataa hyödynnetään päätöksenteossa ja sen avulla yritykset yrittävät saada kilpailuetua. Organisaation osaaminen kuvaa organisaation kykyä hyödyntää sen re-sursseja. Nämä resurssit voivat olla sekä teknisiä että inhimillisiä. Osaamiseen vaikuttavat muun muassa kulttuuri, tiedon hallinta ja organisaation prosessit. Massadatan aikakaudella datasta onkin tullut yksi yritysten tärkeimpiä resursseja. Organisaatiot eivät vielä täysin osaa hyödyntää massadataa. Tämän tutkielman tavoitteena oli selvi…
Functional a posteriori error estimates for boundary element methods
2019
Functional error estimates are well-established tools for a posteriori error estimation and related adaptive mesh-refinement for the finite element method (FEM). The present work proposes a first functional error estimate for the boundary element method (BEM). One key feature is that the derived error estimates are independent of the BEM discretization and provide guaranteed lower and upper bounds for the unknown error. In particular, our analysis covers Galerkin BEM and the collocation method, what makes the approach of particular interest for scientific computations and engineering applications. Numerical experiments for the Laplace problem confirm the theoretical results.
Guaranteed error bounds and local indicators for adaptive solvers using stabilised space-time IgA approximations to parabolic problems
2019
The paper is concerned with space–time IgA approximations to parabolic initial–boundary value problems. We deduce guaranteed and fully computable error bounds adapted to special features of such type of approximations and investigate their efficiency. The derivation of error estimates is based on the analysis of the corresponding integral identity and exploits purely functional arguments in the maximal parabolic regularity setting. The estimates are valid for any approximation from the admissible (energy) class and do not contain mesh-dependent constants. They provide computable and fully guaranteed error bounds for the norms arising in stabilised space–time approximations. Furthermore, a p…
Functional Type Error Control for Stabilised Space-Time IgA Approximations to Parabolic Problems
2018
The paper is concerned with reliable space-time IgA schemes for parabolic initial-boundary value problems. We deduce a posteriori error estimates and investigate their applicability to space-time IgA approximations. Since the derivation is based on purely functional arguments, the estimates do not contain mesh dependent constants and are valid for any approximation from the admissible (energy) class. In particular, they imply estimates for discrete norms associated with stabilised space-time IgA approximations. Finally, we illustrate the reliability and efficiency of presented error estimates for the approximate solutions recovered with IgA techniques on a model example. peerReviewed
Zryczałtowany podatek dochodowy od przychodów osób duchownych po wprowadzeniu „Polskiego Ładu”: uwagi do ustawy z dnia 9 czerwca 2022 r. o zmianie us…
2022
Niniejsza opinia dotyczy ustawy z dnia 9 czerwca 2022 r. o zmianie ustawy o podatku dochodowym od osób fizycznych oraz niektórych innych ustaw. Jednym z celów tej nowelizacji jest rozszerzenie kręgu podatników, dla których zmiany zainicjowane ustawą z dnia 29 października 2021 r. będą korzystne lub neutralne. Zamierzenie projektodawców zasługuje bez wątpienia na pozytywną ocenę. Poza zakresem podmiotów, w przypadku których złagodzono likwidację możliwości odliczenia 7,75% składki na ubezpieczenie zdrowotne od płaconego podatku, nadal pozostawieni są jednak podatnicy opłacający zryczałtowany podatek dochodowy od przychodów osób duchownych. Jak wykazują autorzy, rozwiązanie to pozostaje w spr…
ON SYLOW NORMALIZERS OF FINITE GROUPS
2013
[EN] The paper considers the influence of Sylow normalizers, i.e. normalizers of Sylow subgroups, on the structure of finite groups. In the universe of finite soluble groups it is known that classes of groups with nilpotent Hall subgroups for given sets of primes are exactly the subgroup- closed saturated formations satisfying the following property: a group belongs to the class if and only if its Sylow normalizers do so. The paper analyzes the extension of this research to the universe of all finite groups.
On second minimal subgroups of Sylow subgroups of finite groups
2011
A subgroup H of a finite group G is a partial CAP-subgroup of G if there is a chief series of G such that H either covers or avoids its chief factors. Partial cover and avoidance property has turned out to be very useful to clear up the group structure. In this paper, finite groups in which the second minimal subgroups of their Sylow p-subgroups, p a fixed prime, are partial CAP-subgroups are completely classified.
On some classes of supersoluble groups
2007
[EN] Finite groups G for which for every subgroup H and for all primes q dividing the index |G:H| there exists a subgroup K of G such that H is contained in K and |K:H|=q are called Y-groups. Groups in which subnormal subgroups permute with all Sylow subgroups are called PST-groups. In this paper a local version of the Y-property leading to a local characterisation of Y-groups, from which the classical characterisation emerges, is introduced. The relationship between PST-groups and Y-groups is also analysed.
Finite groups with all minimal subgroups solitary
2016
We give a complete classification of the finite groups with a unique subgroup of order p for each prime p dividing its order. All the groups considered in this paper will be finite. One of the most fruitful lines in the research in abstract group theory during the last years has been the study of groups in which the members of a certain family of subgroups satisfy a certain subgroup embedding property. The family of the subgroups of prime order (also called minimal subgroups) has attracted the interest of many mathematicians. For example, a well-known result of Itˆo (see [8, Kapitel III, Satz 5.3; 9]) states that a group of odd order with all minimal subgroups in the center is nilpotent. Th…