Search results for "Figur"
showing 10 items of 1122 documents
Theory of CaL2,3-edge XAS using a novel multichannel multiple-scattering method
2003
A new method for calculating X-ray absorption spectroscopy (XAS) at the L2,3 edges of Ca and transition metals is presented. It is based on the multichannel multiple-scattering theory by Natoli et al. [Phys. Rev. B, (1990), 42, 1944-1968] combined with the eigen-channel R-matrix formalism. Atomic multiplet-like effects, owing to the Coulomb interaction of photoelectrons and the 2p hole, are taken into account through a configuration interaction ansatz for the final-state wavefunction. The various multiplet states lead to a set of channels for the photoelectron wavefunction, which is calculated in multiple-scattering theory. The method is applied to Ca, an important element for biological ap…
A linear Fe-O-Fe unit in bis(dibenzyldimethylammonium) mu-oxo-bis[tribromoferrate(III)].
2006
The title compound, (C 16 H 20 )N) 2 [Fe 2 Br 6 O], crystallizes with one dibenzyldimethylammonium cation and one half of a μ-oxo-bis[tribromoferrate(III)] anion in the asymmetric unit. The bridging oxo group is situated on an inversion centre, resulting in a linear conformation for the Fe-O-Fe unit. The iron(III) cations have tetrahedral geometry, with bond angles in the range 106.8 (1)-112.2 (1)°. The ion pairs are held together by Coulombic forces and C-H···Br hydrogen bonds. Each Br - anion forms one hydrogen bond. No C-H···O hydrogen bonds are found between the O atom in the Fe-O-Fe unit and surrounding counter-cations, consistent with the linear configuration of the Fe-O-Fe unit.
Three-Dimensional Classification of Lower Third Molars and Their Relationship to the Mandibular Canal.
2021
PURPOSE To develop a novel classification making full use of radiographic three-dimensional (3D) information to describe the position, geometric configuration of a mandibular third molar (M3M) and its spatial relation to neighboring structures such as the mandibular canal (MC). The classification presented in this study helps to establish a common language and serves as a framework for further studies, for example, on 3D parameters influencing prognosis of the M3M and level of difficulty associated with its removal. MATERIAL AND METHODS A total of 8 parameters were included in the classification including position, the cranio-caudal height, the number of roots of the M3M as well as its spat…
Electromagnetic properties of low-lying states in neutron-deficient Hg isotopes: Coulomb excitation of Hg-182, Hg-184, Hg-186 and Hg-188
2019
The neutron-deficient mercury isotopes serve as a classical example of shape coexistence, whereby at low energy near-degenerate nuclear states characterized by different shapes appear. The electromagnetic structure of even-mass 182-188 Hg isotopes was studied using safe-energy Coulomb excitation of neutron-deficient mercury beams delivered by the REX-ISOLDE facility at CERN. The population of $ 0^{+}_{1,2}$01,2+, $ 2^{+}_{1,2}$21,2+and $ 4^{+}_{1}$41+states was observed in all nuclei under study. Reduced E2 matrix elements coupling populated yrast and non-yrast states were extracted, including their relative signs. These are a sensitive probe of shape coexistence and may be used to validate…
Moors and Christians in the Sicilian figurative and performance tradition
2021
Among the different forms of the East/West dichotomy, one is recursive in the Sicilian figurative and performative tradition: the opposition between Moors and Christians. From ex-voto paintings to some traditional festivals and, above all, puppet theatre, this dichotomy grounds a cosmology, a reference system to convey an order to the world. This essay presents some examples.
An historical and morphological introduction to the wall of Piacenza
2013
The essay is articulated through a description of the urban morphology of the city of Piacenza, identifying the most important historical thresholds.
Lexical Aspect and Motion Event Encoding in Homeric Greek: A Case Study - poster
2017
Lexical Aspect and Motion Event Encoding in Homeric Greek: A Case Study This paper aims to investigate the role that lexical aspect (Aktionsart) plays in motion event encoding in Homeric Greek. In particular, the role of telicity as an inherent semantic property of the verb has been recently re-evaluated within the verbal system of early Indo-European languages (Bartolotta 2016). On the basis of textual analysis of the Iliad and the Odyssey, I will argue how Homeric Greek motion verbs appear to be compatible with the entailment of the arrival of the Figure to the Ground according to their inherent telicity (see Bartolotta forthcoming). Specifically, I will focus on the Homeric verbs for ̔ru…
Parole che risuonano. Usi linguistici e simulazione motoria
2012
One of the great merits of the embodied language paradigm is that of highlighting the fact that language understanding has to be led back to action and perception. The comprehension of an action-related sentence activates the same neural structures that enable the execution of that action. However, embodied language studies have been mostly focused on descriptive usages of language. Notions such as those of usage, context or pragmatic intrusion have not been sufficiently considered. A usage-based model of language will be here presented. Embodied language studies will be discussed in the light of this model.
Multiple modular very long instruction word processors based on field programmable gate arrays
2007
Modern field programmable gate array (FPGA) chips, with their large memory capacity and reconfigurability potential, are opening new frontiers in rapid prototyping of embedded systems. With the advent of high-density FPGAs, it is now possible to implement a high-performance very long instruction word (VLIW) processor core in an FPGA. This paper describes research results about enabling the DSP TMS320 C6201 model for real-time image processing applications by exploiting FPGA technology. We present a modular DSP C6201 VHDL model with a variable instruction set. We call this new development a minimum mandatory modules (M3) approach. Our goals are to keep the flexibility of DSP in order to shor…
Flexible VLIW processor based on FPGA for real-time image processing
2011
Modern FPGA chips, with their larger memory capacity and reconfigurability potential, are opening new frontiers in rapid prototyping of embedded systems. With the advent of high density FPGAs it is now possible to implement a high performance Very Long Instruction Word (VLIW) processor core in an FPGA. With VLIW architecture, the processor effectiveness depends on the ability of compilers to provide sufficient Instruction Level Parallelism (ILP) from program code. This paper describes research result about enabling the VLIW processor model for real-time processing applications by exploiting FPGA technology. Our goals are to keep the flexibility of processors in order to shorten the developm…