Search results for "Citation"

Internal conversion from excited electronic states of 229Th ions

2017

The process of internal conversion from excited electronic states is investigated theoretically for the case of the vacuum-ultraviolet nuclear transition of 229 Th . Due to the very low transition energy, the 229 Th nucleus offers the unique possibility to open the otherwise forbidden internal conversion nuclear decay channel for thorium ions via optical laser excitation of the electronic shell. We show that this feature can be exploited to investigate the isomeric state properties via observation of internal conversion from excited electronic configurations of Th + and Th 2 + ions. A possible experimental realization of the proposed scenario at the nuclear laser spectroscopy facility IGISO…

Análisis bibliométrico de las revistas de ortodoncia incluidas en JCR durante el periodo comprendido entre 2007-2017

2018

Introducción: Caracterizar la producción científica personal, institucional o nacional es una necesidad creciente para comprender y mejorar la generación de conocimiento. Se ha elaborado el análisis bibliométrico de las publicaciones científicas que aparecen en las revistas de alto impacto JCR de temática ortodóncica. Objetivo: Evaluar la actividad científica de las publicaciones que aparecen de temática ortodóncica: European Journal of Orthodontics (EJO), American Journal of Orthodontics and Dentofacial Orthopedics (AJODO), Orthodontics&Craniofacial Research (Ortho&Cranio), The Angle Orthodontist (Angle), Korean Journal of Orthodontics (Korean), Journal of Orofacial Orthopedics (Orofacial)…

Kuvallistettu kuuluminen : valokuvahaastattelu ja visuaalinen analyysi paikkasuhteiden tutkimuksessa

2016

Spatial belonging is understood as a multidimensional process in which pictorial representation of the environment also plays an important role. However, various intersecting discursive and personal dimensions in the relations between images, photography and spatial belonging make researching the topic quite challenging. This article focuses on a methodology that combines photo-elicitation and visual analysis to elucidate the relations between images and spatial belonging, and to explore the ways in which the mental images created by discursive landscape imagery can affect the formation of people’s place relations and feelings of spatial belonging. The article draws from a research project …

Unraveling the nature of universal dynamics in O(N) theories

2020

Many-body quantum systems far from equilibrium can exhibit universal scaling dynamics which defy standard classification schemes. Here, we disentangle the dominant excitations in the universal dynamics of highly occupied N-component scalar systems using unequal-time correlators. While previous equal-time studies have conjectured the infrared properties to be universal for all N, we clearly identify for the first time two fundamentally different phenomena relevant at different N. We find all N >= 3 to be indeed dominated by the same Lorentzian "large-N" peak, whereas N = 1 is characterized instead by a non-Lorentzian peak with different properties, and for N = 2, we see a mixture of two cont…

Les plans d'option sur actions:théorie et pratique

2000

Cet article présente une synthèse des travaux théoriques et empiriques consacrés aux stock-options. Il est consacré dans un premier temps aux avantages et inconvénients présumés de ces formules de rémunérations, au sujet des liens entre les plans d'options sur actions et la performance à long terme des firmes, les comportements des salariés (des cadres en particulier), la maîtrise possible de la masse salariale et les risques de dilution du capital. Dans un second temps, en sont précisées les modalités d'application selon les législations en vigueur tant en France qu'en Amérique du Nord, ainsi que stratégies pouvant être adoptées par les détenteurs des options. L'article dresse ensuite un b…

Kohn-Sham Decomposition in Real-Time Time-Dependent Density-Functional Theory An Efficient Tool for Analyzing Plasmonic Excitations

2017

The real-time-propagation formulation of time-dependent density-functional theory (RT-TDDFT) is an efficient method for modeling the optical response of molecules and nanoparticles. Compared to the widely adopted linear-response TDDFT approaches based on, e.g., the Casida equations, RT-TDDFT appears, however, lacking efficient analysis methods. This applies in particular to a decomposition of the response in the basis of the underlying single-electron states. In this work, we overcome this limitation by developing an analysis method for obtaining the Kohn-Sham electron-hole decomposition in RT-TDDFT. We demonstrate the equivalence between the developed method and the Casida approach by a be…

The Design Science Research Process : A Model for Producing and Presenting Information Systems Research

2006

The authors design and demonstrate a process for carrying out design science (DS) research in information systems and demonstrate use of the process to conduct research in two case studies. Several IS researchers have pioneered the acceptance of DS research in IS, but in the last 15 years little DS research has been done within the discipline. The lack of a generally accepted process for DS research in IS may have contributed to this problem. We sought to design a design science research process (DSRP) model that would meet three objectives: it would be consistent with prior literature, it would provide a nominal process model for doing DS research, and it would provide a mental model for p…

Evolution of quadrupole collectivity in N=80 isotones toward the Z=64 subshell gap: The B(E2;2+1→0+1) value of 142Sm

2015

It was shown that the evolution of the B(E2; 2+ 1 → 0+ 1 ) values in N = 80 isotones from Te to Nd is affected by the underlying subshell structure. This manifests itself in the observation of the local suppression of the B(E2) value at Z = 58 with respect to the neighboring nuclei 136Ba and 140Nd. To investigate this shell sensitivity toward the Z = 64 subshell gap, the B(E2; 2+ 1 → 0+ 1 ) value of the unstable nucleus 142Sm was measured utilizing the projectile Coulomb excitation technique. The radioactive ion beam (RIB) experiment was performed at the REX-ISOLDE facility at CERN. The B(E2) value of 32 (4) W.u. reflects the impact of the π(1g7/2 2d5/2) subshell closure at Z = 64 with resp…

Evolution of quadrupole collectivity in N=80 isotones toward the Z=64 subshell gap: The B(E2;2+1→0+1) value of 142Sm

2015

PROPAGATING INTERFACES IN A TWO-LAYER BISTABLE NEURAL NETWORK

2006

The dynamics of propagating interfaces in a bistable neural network is investigated. We consider the network composed of two coupled 1D lattices and assume that they interact in a local spatial point (pin contact). The network unit is modeled by the FitzHugh–Nagumo-like system in a bistable oscillator mode. The interfaces describe the transition of the network units from the rest (unexcited) state to the excited state where each unit exhibits periodic sequences of excitation pulses or action potentials. We show how the localized inter-layer interaction provides an "excitatory" or "inhibitory" action to the oscillatory activity. In particular, we describe the interface propagation failure a…