Browsing by Title
Now showing items 30-49 of 12112
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A bond order dissection ANOVA approach for efficient electronic structure calculations
(2014-03)In this article, we present a new decomposition approach for the efficient approximate calculation of the electronic structure problem for molecules. It is based on a dimension-wise decomposition of the space the underlying ... -
A Ceramic Vessel of Unknown Provenance in Bonn
(2015-01-05)This initial epigraphic note by the members of the "Text Database and Dictionary of Classic Mayan" project is dedicated to text and image of a hitherto unpublished ceramic vessel that is on display in the Bonner ... -
A full three dimensional numerical simulation of the sediment transport and the scouring at a rectangular obstacle
(2015-09)We employ a numerical simulation of the three-dimensional fluid flow and the simultaneous transport of sediment to reproduce current-driven sediment transport processes. In particular, the scouring at a rectangular obstacle ... -
A geopolitical gem: How Greenland can be a test case for a more ambitious EU
(2023)Mit der Eröffnung eines diplomatischen Büros in Grönland unternimmt die EU Schritte, um ihre Arktis-Strategie in die Praxis umzusetzen. Der Inselstaat wird ein Akteur des 21. Jahrhunderts in den Bereichen Nordpol-Logistik, ... -
A gradient sampling method on algebraic varieties and application to nonsmooth low-rank optimization
(2016-10)In this paper, a nonsmooth optimization method for locally Lipschitz functions on real algebraic varieties is developed. To this end, the set-valued map <em>ε</em>-conditional subdifferential <em>x</em> → ... -
A LAsMA Survey of the Milky Way: Effects of Feedback on Molecular Clouds
(2022-09-02)The advent of radio and (sub) millimetre astronomy has opened the world of molecular clouds (MCs) to astronomers' wonder. At the turn of the 21st century, MC surveys have helped us better understand them. How MCs form, ... -
A molecular dynamics study of cementitious calcium silicate hydrate (C-S-H) gels
(2007-05)In this article we study the polymerization of silicic acids (Si(OH)<sub>4</sub>) in the presence of calcium ions by molecular dynamics simulations. We focus on the formation and structure of cementitious calcium silicate ... -
A molecular dynamics study of the aluminosilicate chains structure in Al-rich calcium silicate hydrated (C-S-H) gels
(2007-11)Calcium silicate hydrated (C-S-H) gel is the principal binding phase of the cement paste and responsible for its strength. It is basically composed of silicate chains held together with CaO layers, where different guest ... -
A molecular dynamics study on the impact of defects and functionalization on the Young modulus of boron-nitride nanotubes
(2007)In this article, we examine the Young modulus of (6, <em>m</em>) boron-nitride nanotubes with vacancy and functionalization defects. We employ molecular dynamics simulations using the Parrinello-Rahman approach. To this ... -
A multilevel approach to the evolutionary generation of polycrystalline structures
(2015-11)The Poisson-Voronoi tesselation is commonly used as an approximation to the microstructure of polycrystalline material. Although simple, this approximation fails to respect basic physical properties observed empirically, ... -
A multiscale finite element method for Neumann problems in porous microstructures
(2015-01)In this paper we develop and analyze a Multiscale Finite Element Method (MsFEM) for problems in porous microstructures. By solving local problems throughout the domain we are able to construct a multiscale basis that can ... -
A new generalization of the P1 non-conforming FEM to higher polynomial degrees
(2015)This paper generalizes the non-conforming FEM of Crouzeix and Raviart and its fundamental projection property by a novel mixed formulation for the Poisson problem based on the Helmholtz decomposition. The new formulation ... -
A note on source term representation for control-and-state-constrained parabolic control problems with purely time-dependent control
(2022-06)We revisit the concept of source term representation, originally developed for boundary control problems subject to pointwise state constraints in the domain, and apply it to linear-quadratic parabolic control problems ... -
A note on the construction of L-fold sparse tensor product spaces
(2012-04)In the present paper, we consider the construction of general sparse tensor product spaces in arbitrary space dimensions when the single subdomains are of different dimensionality and the associated ansatz spaces possess ... -
A Possible Logograph XAN “Palm” in Maya Writing
(2016-11-17)This epigraphic note explores the idea that Maya scribes invented and used a sign for “palm, guano” in their writing system. Epigraphic and linguistic data strongly support our hypothesis that the graph A27 renders the ... -
A Preliminary Inventory of the Karl Herbert Mayer Photographic Collection, Graz
(2014-12-08)The present report is concerned with the project’s efforts to digitize the photographic archive of Karl Herbert Mayer, Graz (Austria), and to integrate it into the project’s digital archive of Maya inscriptions. -
A Preliminary Ruling Sequence of Cobá, Quintana Roo
(2004)Within this note, I will make the attempt to establish a preliminary dynastic sequence for Cobá. Unfortunately, no key expressions for the demarcation of distinctive rulers can definitely be made out in the texts, such as ... -
A pure theory of population distribution when preferences are ordinal
(2023-01)We model an environment in which individuals prefer to be in a space in which their rank is higher, be it a social space, a geographical space, a work environment, or any other comparison sphere which we refer to in this ... -
A sparse grid based generative topographic mapping for the dimensionality reduction of high-dimensional data
(2012-05)Most high-dimensional data exhibit some correlation such that data points are not distributed uniformly in the data space but lie approximately on a lower-dimensional manifold. A major problem in many data-mining applications ... -
A Typology and Preferences for Pigeon Pea in Smallholder Mixed Farming Systems in Uganda
(2022-08-09)Pigeon pea (Cajanus cajan) remains an under-researched ‘orphan crop’ yet is important for food and nutrition security of smallholders. Furthermore, smallholders are heterogeneous, with varying perceptions and resource ...
