Sökresultat

Filtyp

Din sökning på "*" gav 532031 sökträffar

Möss, män och mikrodatorer: Manligt och kvinnligt i tidningen Mikrodatorn 1978–1985

Många datorintresserade är män, men könsfördelningen varierar inte bara kraftigt mellan olika kulturer, utan också över tid: även i vår del av världen var programmering länge en utpräglat kvinnlig uppgift. Till skillnad från den feminisering som observerats i många yrken har alltså här istället skett en maskulinisering. Undersökningen syftar till att förstå denna maskulinisering i ett historiskt p

Granskning av Aleksinac kommuns övergångsställen

Through its new road safety program the Aleksinac municipality wants to achieve a higher degree of safety in the city than today. These include a safer environment for vulnerable road users. For many years the municipality has neglected pedestrians, consciously or unconsciously, by not investing enough resources and money to improve their situation in traffic. The municipality now wants to correct

Growth and structural characterization of GaP-GaPSb nanowires

In this thesis epitaxial growth of Ga(P1-xSbx) and analysis by electron microscopy are presented. To the authors knowledge Ga(P1-xSbx)has not been grown in the form of nanowires before and the main motivation of this work is to investigate the possibility of overcoming the miscibility gap (1-99%) in nanostructures. The goal of this project is to gain a better understanding of the general behavior

On a weighted Laplace differential operator for the unit disc

It is well-known that the classical Poisson kernel for the unit disc $\D$ in the complex plane is naturally associated to the Laplacian. In a recent paper Duman has shown that Poisson integrals with respect to the kernel $$ K_2(z)=\frac{1}{2}\frac{(1-\lvert z\rvert^2)^3}{\lvert 1-z\rvert^4}, \quad z\in\D, $$ solve the Dirichlet problem for the unit disc for a certain second order differential oper

Classes of biharmonic polynomials and annihilating differential operators

It is well-known that the classical Poisson kernel for the unit disc $\D$ in the complex plane is naturally associated to the Laplacian. In this paper we establish a similar relationship between the kernel $$ P_2(z)=\frac{1}{2}\frac{(1-\lvert z\rvert^2)^3}{\lvert 1-z\rvert^4}, \quad z\in\D,$$ and a certain second order differential operator $D_2(z,\partial)$. The analysis of this relationship depe

On vector-valued holomorphic functions

We show that a closed subspace of a dual Banach space determines boundedness if and only if it is almost norming. This result further ties up recent work on vector-valued analyticity by Arendt and Nikolski to approximation properties in the weak$^*$ topology. We also present direct proofs of two generalizations of Nelson Dunford's classical result that weak analyticity implies strong analytici

A calculation of limits of L1 means for some weighted Poisson kernels in the unit disc

In this paper we calculate the limit of the $L^1$-means of certain weighted Poisson kernels in the unit disc and show that this limit is equal to $1$. Our result is in sharp contrast to a recent result by George F\"ulep who has shown that some related limit superiors are strictly greater than $1$. Limits of this type are of interest from the point of view of approximation theory.

Missbruk av dominerande ställning

Att säkerställa en effektiv konkurrens på den gemensamma marknaden är oerhört viktigt. Förbudet mot missbruk av dominerande ställning är ett av de viktigaste målen för att uppnå just detta och utgör en grundprincip. Bedömningarna i konkurrensrätten är svåra att göra eftersom varje fall är unikt och bedöms individuellt, vilket gör ämnet speciellt intressant. Då jag granskat relevant litteratur och It is crucial to ensure an effective competition on the common market. In order to do this, the prohibition against misuse of dominating position is one of the most important goals and forms a fundamental principel. What makes the subject interesting is that in competionlaw, the judgements are hard to decide as every case is unique and thus decided individually. By examining relevant literature an

Unearthing exoplanets

This is a bachelor thesis bent on introducing the field of exoplanet research. It primarily includes descriptions of the various detection methods, with some detail into how the methods yield parameter estimates by means of least-squares algorithms. The feasibility of combining state-of-the-art astrometric capabilities of Gaia and radial velocity measurements from ground level is briefly discussed

Operator identities for standard weighted Bergman shift and Toeplitz operators

We prove an operator identity for the shift operator in the scale of standard weighted Bergman spaces in the unit disc. This operator identity is then applied in the context of functional calculus for the shift operator and a characterization of harmonic symbol Bergman space Toeplitz operators is obtained generalizing an earlier result by Louhichi and Olofsson. Duality arguments lead to operator i

An Empirical Analysis of the Consumer Information in the Restaurant Industry in Sweden

A reputation good is a good that you have to consume before you can assess its quality. Therefore, there is asymmetric information in favor of the seller. This good is also characterized by the fact that people often turn to friends and family for recommendations. On the contrary to standard economic theory of competition, an increased number of sellers on a market for reputation goods may lead to

On some Bergman shift operators

An operator identity satisfied by the shift operator in a class of standard weighted Bergman spaces is studied. We show that subject to a pureness condition this operator identity characterizes the associated Bergman shift operator up to unitary equivalence allowing for a general multiplicity. The analysis of the general case makes contact with the class of $n$-isometries studied by Agler and Stan

Tensor Product Decomposition in Lie Algebra Representation Theory

The basic theory of semisimple Lie algebras and their representations is studied in detail. In particular it is shown that every irreducible module V (λ) is uniquely determined up to isomorphism by its highest weight λ. Then the problem of decomposing a tensor product of two finite dimensional modules into a direct sum of irreducible modules is considered. It is shown that for λ fixed, the decompo

Collisions beetween Jupiter-like planets

Med hjälp av tredimensionella datorsimulationer har vi studerat utfallen från kollisioner mellan planeter. Målet med projektet var att utreda beroendet av kollisionsparametrar som till exempel avståndet vid närmaste passage, hastighet och planeternas massor. Vi kom fram till att planeterna kan bli gravitationellt bundna efter kollisionerna på grund av energiförluster som gör att de eventuellt kollUsing three-dimensional smoothed particle hydrodynamics (SPH) simulations, we have studied the outcomes from collisions between Jupiter-like planets. Planet models have been generated from polytropic profiles using a polytropic index of n=1 and each planet is represented by 15,000 particles. The dependency on a range of parameters specifying the point of closest approach, velocity at infinity and

The Mathieu groups

In the 19th century E. Mathieu discovered and studied five multiply transitive permutation groups. The grops are called the Mathieu groups and it turned out that all five are simple. In this thesis these remarkable groups are constructed, with special focus on the largest Mathieu group M24. All maximal subgroups of M24 will be described and classied. It is also shown that the other Mathieu groups