Search results for "circle"
showing 10 items of 122 documents
Mohr-cyclides, a 3D representation of geological tensors: The examples of stress and flow
2008
Mohr-circles are commonly used to represent second-rank tensors in two dimensions. In geology, this mainly applies to stress, flow, strain and deformation. Three-dimensional second rank tensors have been represented by sets of three Mohr-circles, mainly in the application of stress. This paper demonstrates that three-dimensional second rank tensors can in fact be represented in a three-dimensional reference frame by Mohr surfaces, which are members of the cyclide family. Such Mohr-cyclides can be used to represent any second rank tensor and are exemplified with the stress and flow tensors.
The impact of user’s availability on On-line Ego Networks: a Facebook analysis
2016
We have defined and implemented a Facebook application to log a Facebook dataset.We have studied and validated the structural properties of the whole dataset and of the Dunbar ego networks.We have analyzed the interactions of the users.The availability of the users in the Dunbar ego networks have been investigated.Our results reveal the presence of the temporal homophily property in the Dunbar ego networks. Online Social Networks (OSNs) are the most popular applications in todays Internet and they have changed the way people interact with each other. Understanding the structural properties of OSNs and, in particular, how users behave when they connect to OSNs is crucial for designing user-c…
Seifert manifolds admitting partially hyperbolic diffeomorphisms
2017
We characterize which 3-dimensional Seifert manifolds admit transitive partially hyperbolic diffeomorphisms. In particular, a circle bundle over a higher-genus surface admits a transitive partially hyperbolic diffeomorphism if and only if it admits an Anosov flow.
2021
Abstract We extend the classical Carathéodory extension theorem to quasiconformal Jordan domains (Y, dY ). We say that a metric space (Y, dY ) is a quasiconformal Jordan domain if the completion ̄Y of (Y, dY ) has finite Hausdorff 2-measure, the boundary ∂Y = ̄Y \ Y is homeomorphic to 𝕊1, and there exists a homeomorphism ϕ: 𝔻 →(Y, dY ) that is quasiconformal in the geometric sense. We show that ϕ has a continuous, monotone, and surjective extension Φ: 𝔻 ̄ → Y ̄. This result is best possible in this generality. In addition, we find a necessary and sufficient condition for Φ to be a quasiconformal homeomorphism. We provide sufficient conditions for the restriction of Φ to 𝕊1 being a quasi…
Global extrapolation with a parallel splitting method
1992
Extrapolation with a parallel splitting method is discussed. The parallel splitting method reduces a multidimensional problem into independent one-dimensional problems and can improve the convergence order of space variables to an order as high as the regularity of the solution permits. Therefore, in order to match the convergence order of the space variables, a high order method should also be used for the time integration. Second and third order extrapolation methods are used to improve the time convergence and it was found that the higher order extrapolation method can produce a more accurate solution than the lower order extrapolation method, but the convergence order of high order extr…
Exponential stability analysis of Markovian jump nonlinear systems with mixed time delays and partially known transition probabilities
2013
In this paper, the problem of exponential stability is studied for a class of Markovian jump neutral nonlinear systems with mixed neutral and discrete time delays. By Lyapunov-Krasovskii function approach, a novel mean-square exponential stability criterion is derived for the situation that the system's transition rates are partially or completely accessible. Finally, some numerical examples are provided to illustrate the effectiveness of the proposed methods.
Development of S/MAR minicircles for enhanced and persistent transgene expression in the mouse liver.
2010
We have previously described the development of a scaffold/matrix attachment region (S/MAR) episomal vector system for in vivo application and demonstrated its utility to sustain transgene expression in the mouse liver for at least 6 months following a single administration. Subsequently, we observed that transgene expression is sustained for the lifetime of the animal. The level of expression, however, does drop appreciably over time. We hypothesised that by eliminating the bacterial components in our vectors, we could improve their performance since bacterial sequences have been shown to be responsible for the immunotoxicity of the vector and the silencing of its expression when applied i…
A Gamified Mobility Experience
2020
We believe in the use of urban games to define new enjoyable experiences, change citizens’ unsustainable habits and educate them to new environment-and social-friendly ones. This paper presents MUV, an innovative action that has the power to engage citizens and foster sustainable mobility behaviors. MUV complements engaging HMIs with a participatory method within an iterative innovation process called the virtuous cycle (understand, involve, co-create, implement, experiment). The innovation process has led to a new game dynamic: Mobility as a Sport. It results in a rewarding personal mobility experience; the same rewarding sensations the athletes feel when they improve their results.
Patērētāju attieksme pret Circle K zīmolu Latvijā.
2019
Bakalaura darba tēma ir „Patērētāju attieksme pret Circle K zīmolu Latvijā” Bakalaura darbs tiek veltīts patērētāju uzvedības un zīmola būtības izzināšanai, kā arī veiksmīgas zīmola maiņas definēšanā. Par darba izpētes objektu tika izvēlēts “Circle K” uzņēmuma zīmols. Pētījuma laikā “Circle K” kā starptautisks zīmols ir tikko veicis zīmola maiņu Latvijā. Bakalaura darba mērķis ir, pamatojoties uz zīmola un zīmola maiņas un patērētāju uzvedības teorētisko izpratni, veikt degvielas uzpildes stacijas “Circle K” zīmola maiņas analīzi un izstrādāt priekšlikumus “Circle K” zīmola pilnveidošanai un attīstībai nākotnē. Empīriskajā pētījumā tiek izmantotas aptaujas metodes, kur tiek salīdzinātas div…
Klientu attiecību vadīšana uzņēmumā.
2018
Bakalaura darba mērķis ir pamatojoties uz līdzšinējo Circle K klientu attiecību vadīšanas pamatprincipu, analīzi un salīdzināšanu ar konkurentu piedāvājumiem, izstrādāt priekšlikumus tās uzlabošanai. Pirmajā nodaļā analizēti klientu attiecību vadīšanas teorētiskie aspekti un galvenie ieguvumi, kā arī apskatīti klientu lojalitātes veicināšanas principi. Otrajā nodaļā tiek pētīta lojalitāšu karšu efektivitāte balstoties uz statistikas datiem, kā arī apskatīta klientu attiecību vadīšanu uzņēmumos Circle K un VIRŠI-A. Trešajā nodaļā veikta Circle K un VIRŠI-A pārstāvju interviju analīze, kā arī balstoties uz veiktās aptaujas rezultātiem, analizēta klientu lojalitāte degvielas tirgotājiem. Darbs…