Search results for "construct"

Investigation into the ecosystem services of intertidal bioconstruction in the context of coastal erosion and rock breakdown

2014

General Diagnosis and Medical Evaluation

2019

Current literature does not contribute to a high level of evidence regarding possible indications for immediate loading. A great variety of exclusion criteria for immediate loading of dental implants are used in different studies. However, the reported criteria are similar to those chosen for conventional loading of dental implants. Despite its several clinical advantages, the immediate loading protocol should be performed respecting a rigorous preliminary diagnostic algorithm. Primary indication for immediate implant loading is certainly patients’ desire to reduce the overall treatment time. Additionally, several psychological factors, related to the preservation of functional and esthetic…

The professional agency of teacher educators amid academic discourses

2012

Agency has been seen as fundamental in the renegotiation of professional identities. However, it is unclear how teacher educators exercise their professional agency in their work, and how multiple discourses frame and restrict the practice of their professional agency. This study examines how teacher educators practise agency in negotiating their professional identities amid the multiple discourses emerging from the academic context of their work. The aim was to investigate educators’ locally expressed professional agency in the context of the more global discourses that may construct teacher educator identities. The analysis made use of applied thematic discursive analysis to address patte…

L’Effet Hamlet: une dégénérescence transformationnelle?

2022

Max a enfermé Tom dans la cave does not specify whether Tom was in the cellar before being locked up or not. This article shows how this semantic indeterminacy, highlighted and called Effet Hamlet by Jean-Paul Boons in the late seventies, should perhaps be considered a fall-out of syn- tactic transformational processes.

Energy management strategy to reduce pollutant emissions during the catalyst light-off of parallel hybrid vehicles

2020

Abstract The transportation sector is a major contributor to both air pollution and greenhouse gas emissions. Hybrid electric vehicles can reduce fuel consumption and CO2 emissions by optimizing the energy management of the powertrain. The purpose of this study is to examine the trade-off between regulated pollutant emissions and hybrid powertrain efficiency. The thermal dynamics of the three-way catalyst are taken into account in order to optimize the light-off. Experimental campaigns are conducted on a spark-ignition engine to introduce simplified models for emissions, exhaust gas temperature, catalyst heat transfers and efficiency. These models are used to determine the optimal distribut…

C-S-H/solution interface: Experimental and Monte Carlo studies

2010

International audience; The surface charge density of C-S-H particles appears to be one of the key parameters for predicting the cohesion strength, understanding the ion retention, the pollutant leakage, and admixture adsorption in hydrated cement pastes. This paper presents a Monte Carlo simulation of the surface-ions interactions that permits the prediction of surface charge density (σ), electrokinetic potential (ζ) and ions adsorption of mineral surfaces in equilibrium with a given electrolyte solution. Simulated results are compared to experimental data obtained by titration, electrokinetic potential measurements and ions uptake in the case of C-S-H suspensions. An excellent agreement i…

Near field retrieval from far field using PDFT

2008

A new algorithm is applied for obtaining the near field form far field measurements. It is not only the simple DFT applied to the spectrum, but also a newer algorithm, called PDFT, which makes use of the information in the transformed domain. Its main advantage is that the resolution obtained is better than with DFT, since more information about the antenna is used. Furthermore, no iterations are applied and the best approximation in the way of minimum weighted norm is achieved.

Electromechanical impedance method for the health monitoring of bonded joints: Numerical modelling and experimental validation

2014

The electromechanical impedance (EMI) method is one of the many nondestructive evaluation approaches proposed for the health monitoring of aerospace, civil, and mechanical structures. The method consists of attaching or embedding one or more wafer-type piezoelectric transducers (PZTs) to the system of interest, the host structure, and measuring certain electrical characteristics of the transducers. As these characteristics are also related to the impedance of the host structure, they can be used to infer the mechanical properties of the monitored structure. In the study presented in this paper, we utilize the EMI to monitor the quality of adhesively bonded joints. A finite element formulati…

Compensation of missing wedge effects with sequential statistical reconstruction in electron tomography.

2014

Electron tomography (ET) of biological samples is used to study the organization and the structure of the whole cell and subcellular complexes in great detail. However, projections cannot be acquired over full tilt angle range with biological samples in electron microscopy. ET image reconstruction can be considered an ill-posed problem because of this missing information. This results in artifacts, seen as the loss of three-dimensional (3D) resolution in the reconstructed images. The goal of this study was to achieve isotropic resolution with a statistical reconstruction method, sequential maximum a posteriori expectation maximization (sMAP-EM), using no prior morphological knowledge about …

Uncovering the metastable γ-Ag2WO4 phase: a joint experimental and theoretical study

2017

The synthesis of metastable solid phases is a pivotal starting point for innovative materials research. Here, we report the synthesis by means of a precipitation method of the metastable cubic γ-Ag2WO4 phase under ambient conditions. Different experimental techniques such as X-ray diffraction (XRD) with Rietveld refinement, field emission scanning electron microscopy (FE-SEM), micro-Raman/ultraviolet-visible (UV-vis) diffuse reflectance, photoluminescence spectroscopies, and differential scanning calorimetry (DSC) were employed. To complement the experimental data, the geometry, morphology, vibrational and electronic structure of γ-Ag2WO4 were characterized and evaluated using first-princip…