Bartoli C.,LNE |
Beug M.F.,PTB |
Bruns T.,PTB |
Elster C.,PTB |
And 6 more authors.
International Journal of Metrology and Quality Engineering | Year: 2012
Nine european national metrology institutes (NMIs) are collaborating in a new project funded by the european metrology research programme (EMRP) to establish traceable dynamic measurement of the mechanical quantities force, pressure, and torque. The aim of this joint research project (JRP) is to develop appropriate calibration methods, mathematical models, and uncertainty evaluation. The duration of the project is 3 years for a global amount of €3.6 million. It began in September 2011. © EDP Sciences 2013.
Care I.,LNE |
Arenas M.,Electricite de France
16th International Flow Measurement Conference 2013, FLOMEKO 2013 | Year: 2013
In the present paper, experimental and numerical investigations of the flow around different types and sizes of anemometers are presented and discussed. The measurements of the flow field at different distances upstream to the anemometer are performed with a laser Doppler Anemometer. The computational results are in rather good agreement with the experimental ones and show that anemometers may induce a strong distortion of the velocity field, even far upstream the anemometer. Copyright© (2013) by the International Measurement Federation (IMEKO).
Chebil S.,IRSTEA |
Monod M.O.,IRSTEA |
Electrochimica Acta | Year: 2014
Novel nano- and microstructures of polypyrrole were synthesized by an electrochemical template-free method on Nickel (Ni) electrode. Scanning Electron Microscope (SEM) study revealed nano- and micro-snails of polypyrrole after the one-step potentiostatic electropolymerization of pyrrole in aqueous alkaline solution. The influence of the anodic polarization time on the morphological, mechanistic and electrochemical characteristics of these novel polymeric films was investigated. An appropriate mathematical model was established and showed that two simultaneous 2D growth instantaneous nucleation processes and a successive 3D growth progressive nucleation mechanism are involved in the polypyrrole micro-snails formation under a diffusion control. Polypyrrole layers generated from these processes appeared to be in different overoxidation states from X-ray Photoelectron analysis and from the electroactivity study of the modified Ni electrode. © 2014 Elsevier Ltd.
Broekx S.,Flemish Institute for Technological Research |
Broekx S.,Ghent University |
Liekens I.,Flemish Institute for Technological Research |
Peelaerts W.,Flemish Institute for Technological Research |
And 9 more authors.
Environmental Impact Assessment Review | Year: 2013
Assessing the impacts of policies on a wide range of ecosystem services can support the development of cost-effective policies that establish win-win situations across different environmental domains. To explore the quantity and value of ecosystem services, the web-based application "nature value explorer"was developed. The application allows to estimate the impact of land use and land cover change on regulating and cultural ecosystemservices in Flanders, Belgium. To ensure the applicability in day-to-day decision making as part of environmental impact assessments, user requirements were investigated prior to tool development. Finding the optimal balance between accuracy and complexity on the one hand and flexibility and user-friendliness on the other hand was an important challenge. To date, the nature value explorer has been successful in drawing the interest of policy makers and has been used several times to support decisions in infrastructure projects as well as in nature restoration projects in Flanders. This paper discusses the user requirements, the main tool characteristics, potential policy applications and future improvements. Three case studies illustrate the functionalities of the tool in day-to-day decision making. © 2013 Elsevier Inc.
Sabuga W.,PTB |
Prazak D.,CMI |
EPJ Web of Conferences | Year: 2014
Five European national metrology institutes in collaboration with a university, a research institute and five industrial companies are working on a joint research project within a framework of the European Metrology Research Programme aimed at development of 1.6 GPa primary and 1.5 GPa transfer pressure standards. Two primary pressure standards were realised as pressure-measuring multipliers, each consisting of a low pressure and a high pressure (HP) piston-cylinder assembly (PCA). A special design of the HP PCAs was developed in which a tungsten carbide cylinder is supported by two thermally shrunk steel sleeves and, additionally, by jacket pressure applied to the outside of the outer sleeve. Stress-strain finite element analysis (FEA) was performed to predict behaviour of the multipliers and a pressure generation system. With FEA, the pressure distortion coefficient was determined, taking into account irregularities of the piston-cylinder gap. Transfer pressure standards up to 1.5 GPa are developed on the basis of modern 1.5 GPa pressure transducers. This project shall solve a discrepancy between the growing needs of the industry demanding precise traceable calibrations of the high pressure transducers and the absence of adequate primary standards for pressures higher than 1 GPa in the European Union today. © Owned by the authors, published by EDP Sciences, 2014.