Search results for "rete"
showing 10 items of 3470 documents
The Fitting Subgroup and Some Injectors of Radical Locally Finite Groups with min-pfor Allp
2003
Abstract This work was intended as an attempt to continue the study of the class ℬ of generalised nilpotent groups started in a previous paper. We present some results concerning the Fitting subgroup and the ℬ-injectors of a radical locally finite group satisfying min-p for all p.
A Gaschütz–Lubeseder Type Theorem in a Class of Locally Finite Groups
1999
The aim of this paper is to present a Gaschutz–Lubeseder type theorem in the class cL of all radical locally finite groups satisfying min−p for all primes p. Notice that these groups are countable and co-Hopfian by [1, (5.4.8)]. In retrospect, the theory of saturated formations of finite soluble groups began with the results of Gaschutz [3] in 1963. He introduced the concept of “covering subgroup” as a generalization of Sylow and Hall subgroups. These covering subgroups have many of the properties of Sylow and Hall subgroups other than the arithmetic ones. The main idea of Gaschutz’s work was concerned with group theoretical classes having the same properties. He defined a formation F to be…
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.
Variational parabolic capacity
2015
We establish a variational parabolic capacity in a context of degenerate parabolic equations of $p$-Laplace type, and show that this capacity is equivalent to the nonlinear parabolic capacity. As an application, we estimate the capacities of several explicit sets.
Subaerālās atsegšanās notikumu pazīmes un veidojumi devona slāņkopā Latvijā
2015
Promocijas darba mērķis ir identificēt subaerālās atsegšanās notikumus devona periodā Latvijas teritorijā un noskaidrot ģeoloģiskos apstākļus un procesus, kas bija raksturīgi šiem notikumiem. Detalizēti pētīti Živetas stāva Burtnieku svītas, Franas stāva Amatas svītas un Famenas stāva Šķerveļa svītas Nīkrāces ridas nogulumi. Pētījuma pamatā ir dolokrētu paveidu nodalīšana un veidošanās apstākļu interpretācija, pamatojoties uz to struktūru un tekstūru, minerālā sastāva, it īpaši māla minerālu pētījumiem, ģeoķīmisko, t. sk. O un C stabilo izotopu analīzi, kā arī pētījumiem SEM. Ir diskutēts par abiogēnu morfoloģisko pazīmju izmantošanu subaerālās atsegšanās apstākļu identifikācijā, par pētīto…
Identification of various retention/release behaviours of odorant molecules in dairy and pectin gels: the role of structural features
2014
Reducing the fat content in food requires a reformulation by adding thickeners that may cause a different perception of aroma. Maintaining an adequate level of acceptability of these reformulated products for consumers requires a better understanding of the mechanisms that control the retention/release balance of odorant molecules in food matrices. [1]. Although pectins are commonly employed as thickeners [2], their effect on the retention of odorant molecules in nonhomogeneous products [3, 4] has been examined more frequently than their effect on the retention of odorant molecules in simple model gels [5]. The purpose of this study was to explore and compare the effects of pectin in differ…
Compromiso Estudiantil en el Contexto Universitario Colombiano y Desempeño Académico
2014
20 páginas A pesar de la ampliación de la cobertura en la educación superior latinoamericana, persisten graves problemas de deserción que llevan a cuestionar el papel de las experiencias educativas en el fomento del compromiso académico de los estudiantes. Esta investigación se realizó en Colombia y buscó determinar la relación que existe entre el compromiso estudiantil y el desempeño académico de un grupo de universitarios colombianos. El estudio transversal y correlacional empleó la versión en español de la encuesta National Survey of Student Engagement (NSSE) que mide el nivel de participación de los estudiantes en cinco dimensiones: reto académico, aprendizaje activo y colaborativo, int…
A Complete, Exact and Efficient Implementation for Computing the Edge-Adjacency Graph of an Arrangement of Quadrics
2011
International audience; We present a complete, exact and efficient implementation to compute the edge-adjacency graph of an arrangement of quadrics, i.e. surfaces of algebraic degree 2. This is a major step towards the computation of the full 3D arrangement. We enhanced an implementation for an exact parameterization of the intersection curves of two quadrics, such that we can compute the exact parameter value for intersection points and from that the edge-adjacency graph of the arrangement. Our implementation is complete in the sense that it can handle all kinds of inputs including all degenerate ones, i.e. singularities or tangential intersection points. It is exact in that it always comp…
Improvement of partition coefficients determination of aroma compounds in food matrices by the phase ratio variation method
2011
The Phase Ratio Variation (PRV) method is a very valuable method commonly used for liquid/vapor partition coefficients data acquisition of aroma compounds. Nevertheless, some limits are linked to this method, especially for volatile compounds. A careful examination of the PRV equation leads us to propose the following expression: 1/Cvap-real =(nliq/n0) x 1/Cvap-ideal = (nliq/n0) x (1/KC0 + (1/Co) b), We performed an examination for two cases of K values (K1=0.001 and K2=0.05), putting forward that a carefully choice of b range values is crucial for reliability of the regression calculation 1/A versus b.
Iespējamie virzītājspēki vēja parku akceptēšanai un sociāli iekļaujošai izmantošanai Latvijā
2020
Lai gan Latvijas rādītāji atjaunojamo energoresursu izmantošanā enerģijas ražošanai ir vieni no labākajiem Eiropas Savienībā (ES), ierindojot Latviju šajā kategorijā trešajā vietā starp ES valstīm, vēja enerģijas devums šajā nopelnā ir nebūtisks, kā arī jaunākie centieni šo situāciju mainīt ir rezultējušies ar aktīvu iedzīvotāju pretestību un vēja parka ieceres noraidījumu no pašvaldības puses. Maģistra darba ietvaros autore ir pētījusi citu valstu labās prakses piemērus vēja enerģijas akceptējamības veicināšanā; WinWind projekta ietvaros ar vēja nozari saistītu ieinteresēto pušu (stakeholder) lokā identificējusi iniciatīvas un rīcības, kas stimulētu kopienas vēja parku izveidi Latvijā; ar …