Search results for "REEs"
showing 10 items of 921 documents
Fracture and fatigue of titanium narrow dental implants: New trends in order to improve the mechanical response
2019
Sixty-four fractured commercially pure titanium (cp-Ti) narrow dental implants (NDIs) with similar macrogeometry and connection designs were studied after different implantation times in humans in order to determine their reliability and to evaluate the causes of the fracture. These NDIs were compared with other similar implants, made with alloyed titanium with 15% Zr and with 12% strained titanium. Original implants were tested under static and fatigue conditions, simulating the tri-axial loads in the mouth by means of a Bionix hydraulic test machine. Fractography was studied using field-emission scanning electron microscopy (FSEM). The results showed that cp-Ti NDI exhibits low strength f…
Los precursores de la baja atención e hiperactividad en niños moderadamente y muy prematuros en edad preescolar
2013
Abstract La escasa atención e hiperactividad son las morbilidades asociadas con el nacimiento muy prematuro y moderadamente. El objetivo del estudio es investigar la posible presencia de los primeros precursores de Déficit de Atención e Hiperactividad (TDAH) en niños muy prematuros y moderadamente en la edad preescolar. Los niños participantes fueron: 25 niños muy prematuros (M = 29,4 semanas de edad gestacional, SD = 2), con bajo peso al nacer, 35 niños moderadamente prematuros (M = 1.200 g, SD = 250 g.).: 34,6 semanas de edad gestacional, SD: 1) con bajo peso al nacer (M: 2100g, SD:.. 250 g), 60 niños sanos a término como grupo control. Los padres de los niños se administraron cuestionari…
Zum Partizip I als unflektierter adjektivischer Prädikativergänzug
2008
According to relevant literature the use of the 1st participle as a predicative is said to be very restricted. The restrictions, however, are understood in many different ways. The aim of this article is to verify the validity of semantic, morphological and syntactic criteria and to show the insufficiencies of the rules formulated so far. peerReviewed
Developing a career promotion model for Romanian football referees
2010
Football refereeing has become more demanding in terms of physical and mental preparation. Elite football referees are seen as athletes nowadays and the latest changes have brought major challenges in terms of job and occupation. The officials have changed their perspectives regarding their sport involvement due to the national football associations which have decided to have a certain number of professional referees. Therefore, top level football referees have taken the path towards professionalization. The aim of the study was to develop a career model for the football referees. The model was created through the career development theories and studies. Super’s career development theory (1…
Selective writing and read-out of a register of static qubits
2013
We propose a setup comprising an arbitrarily large array of static qubits (SQs), which interact with a flying qubit (FQ). The SQs work as a quantum register, which can be written or read-out by means of the FQ through quantum state transfer (QST). The entire system, including the FQ's motional degrees of freedom, behaves quantum mechanically. We demonstrate a strategy allowing for selective QST between the FQ and a single SQ chosen from the register. This is achieved through a perfect mirror located beyond the SQs and suitable modulation of the inter-SQ distances.
Controlling Atom-Photon Bound States in an Array of Josephson-Junction Resonators
2022
Engineering the electromagnetic environment of a quantum emitter gives rise to a plethora of exotic light -matter interactions. In particular, photonic lattices can seed long-lived atom-photon bound states inside photonic band gaps. Here, we report on the concept and implementation of a novel microwave architecture consisting of an array of compact superconducting resonators in which we have embedded two frequency -tunable artificial atoms. We study the atom-field interaction and access previously unexplored coupling regimes, in both the single-and double-excitation subspace. In addition, we demonstrate coherent interactions between two atom-photon bound states, in both resonant and dispers…
Experimental Engineering of Arbitrary Qudit States with Discrete-Time Quantum Walks
2019
The capability to generate and manipulate quantum states in high-dimensional Hilbert spaces is a crucial step for the development of quantum technologies, from quantum communication to quantum computation. One-dimensional quantum walk dynamics represents a valid tool in the task of engineering arbitrary quantum states. Here we affirm such potential in a linear-optics platform that realizes discrete-time quantum walks in the orbital angular momentum degree of freedom of photons. Different classes of relevant qudit states in a six-dimensional space are prepared and measured, confirming the feasibility of the protocol. Our results represent a further investigation of quantum walk dynamics in p…
Application of selected supervised classification methods to bank marketing campaign
2016
Supervised classification covers a number of data mining methods based on training data. These methods have been successfully applied to solve multi-criteria complex classification problems in many domains, including economical issues. In this paper we discuss features of some supervised classification methods based on decision trees and apply them to the direct marketing campaigns data of a Portuguese banking institution. We discuss and compare the following classification methods: decision trees, bagging, boosting, and random forests. A classification problem in our approach is defined in a scenario where a bank’s clients make decisions about the activation of their deposits. The obtained…
Las manifestaciones culturales en su contribución a la creación de la “idea de Europa”: el caso de El corregidor y la molinera
2014
La idea de una Europa global pero a su vez unitaria culturalmente ha sido uno de los temas de debate abordados recientemente desde la literatura comparada y otras disciplinas. Este artículo incide en el interés artístico de la historia de “El corregidor y la molinera” y su posible contribución a la unidad europea, a partir del análisis comparativo de algunas de las manifestaciones culturales que presentan distintas y muy variadas reescrituras del tema literario. Pedro Antonio de Alarcón, Manuel de Falla, Fiódor M. Dostoievski o Leoš Janácek son algunos de los autores fundamentales que nos proponen su visión particular de esta historia de tradición popular, cuya comprensión compartida más al…
The uncertainty of the energy demand in existing mediterranean urban blocks
2013
The objective of the paper is to describe a stochastic model that has been developed to obtain load profiles for household electricity. For the study, several profiles have been generated in order to simulate the electrical demand of a residential building block or neighbourhood and evaluate the uncertainty of its energy use. The paper is divided in three different parts: development of the model, validation and determination of the uncertainty demand. In the first parts the basis of the model and how it works is explained. The second one represents the validation of the model, the input data and its results. The last step is focused on a statistical analysis of the electricity demand of a …