I - Matter, antimatter and geometry II - The twin universe model : a solution to the problem of negative energy particles III - The twin universe model plus electric charges and matter-antimatter symmetry

We introduce a new dynamical group whose coadjoint action on its momentum space takes account of matter-antimatter symmetry on pure geometrical grounds. According to this description the energy and the spin are unchanged under matter-antimatter symmetry. We recall that the antichron components of the Poincar\'{e} group, ruling relativistic motions of a mass-point particle, generate negative energy particles. The model with two twin universes, inspired by Sakharov's one, solves the stability issue. Positive and negative energy particles motions hold in two distinct folds. The model is extended to charged particles. As a result, the matter-antimatter duality holds in both universes.Comment: 19 Fevrier 200

Conductance increases produced by bath application of cholinergic agonists to Electrophorus electroplaques

When solutions containing agonists are applied to the innervated face of an Electrophorus electroplaque, the membrane's conductance increases. The agonist-induced conductance is increased at more negative membrane potentials. The "instantaneous" current-voltage curve for agonist-induced currents is linear and shows a reversal potential near zero mV; chord conductances, calculated on the basis of this reversal potential, change epsilon-fold for every 62-mV change in potential when the conductance is small. Conductance depends non- linearly on small agonist concentrations; at all potentials, the dose-response curve has a Hill coefficient of 1.45 for decamethonium (Deca) and 1.90 for carbamylcholine (Carb). With agonist concentrations greater than 10^(-4) M Carb or 10^(-5) M Deca, the conductance rises to a peak 0.5-1.5 min after introduction of agonist, then declines with time; this effect resembles the "desensitization" reported for myoneural junctions. Elapid alpha-toxin, tubocurarine, and desensitization reduce the conductance without changing the effects of potential; the apparent dissociation constant for tubocurarine is 2 X 10^(-7) M. By contrast, procaine effects a greater fractional inhibition of the conductance at high negative potentials

A new experimental set-up for the study of the formation and dissociation of methane hydrate in sediments

methane hydrates ; sediments ; kinetics ; modelling ; heat transfer ; mass transfer ;International audienceIn this paper, we give a short presentation of the project ForDiMHyS which consists of experimental studies and model establishment (or development) of the kinetics of FORmation and Dissociation of Methane Hydrates in Sediments. We focus on the details of the experimental set-up which is newly, specially designed for this study in the preliminary step of the project. The four French academic teams and two PhD thesis are involved in the ForDiMHyS project on the period 2000-2004. The financial support is given by the five French Partners. The project consists of two-step programs; firstly the data acquisition from the laboratory experimental set-up and secondly simulation of methane production from methane hydrate fields

Use of the ETV logo and post-verification requirements when marketing a technology verified through the ETV scheme

Environmental Technology Verification (ETV) is a new tool enabling the verification of the performance claims put forward by developers of innovative environmental technologies. The Programme is set up foreseeing the existence of Technical Working Groups (TWGs), one for each technology area active under the Pilot Programme. These are chaired by the JRC and composed by Commission Invited Experts and by Experts representing the Verification Bodies with the overall aim to harmonise and exchange good practices among member states. ETV has a logo inherited from previous ETV FP7 projects, but it is not an official logo of the European Commission. ETV is not a certification nor a labialisation scheme. Therefore the logo should be used in well-defined conditions, specifying clearly what has been verified. This document defines and clarifies all elements relative to the logo and its use: design specifications, uses of the logo under different marketing circumstances and communication purposes. This document, adopted on the date by the TWGs on 08/04/2015, is a guidance document, with the meaning given in the General Verification Protocol of the EU ETV pilot programme (version 1.1), Section A.II.4.3. It has been produced by the EU ETV Technical Working Groups, chaired by the JRC, under the auspices of DG Environment. This document is also deliverable 2.1.6.4 under the Administrative Arrangement 070307/2011/630755/F4 between DG ENV and JRC (ref JRC No. 32937), “Scientific and technical support for the implementation of the EU Environmental Technology Verification (ETV) pilot programme” as modified by amendment 1 signed 16/06/2014.JRC.F.6-Energy Technology Policy Outloo

Guidelines for addressing the interfaces between Technology Areas in the context of the EU-ETV Pilot Program

Environmental Technology Verification (ETV) is a new tool enabling the verification of the performance claims put forward by developers of innovative environmental technologies. As specified in the ETV General Verification Protocol (GVP), the EU-ETV programme, launched in 2011 by DG-ENV is covering three Technology Areas (TAs): Water treatment and monitoring, Materials, waste and resources, Energy Technologies. The verification bodies in charge of performing the verifications have to be accredited for one or more of these 3 TAs or part thereof. Three dedicated Technical Working Groups (TWGs) have been set up in order to provide technical guidance for the technologies falling under these TAs. Although the GVP is providing examples of technologies for each of the TA, the precise frontier between them is not always clear, in particular for technologies that relate to more than one distinct technology areas (e.g. energy efficiency in the domain of water treatment). This document provides guidance on this issue, in order to help decision making and ensure a harmonised approach thought the ETV scheme. This document, adopted on the on the 04/08/2015 by the TWGs, is a guidance document, with the meaning given in the General Verification Protocol of the EU ETV pilot programme (version 1.1), Section A.II.4.3. It has been produced by the EU ETV Technical Working Groups, chaired by the JRC, under the auspices of DG Environment. This document is also deliverable 2.1.6.4 under the Administrative Arrangement 070307/2011/630755/F4 between DG ENV and JRC (ref JRC No. 32937), “Scientific and technical support for the implementation of the EU Environmental Technology Verification (ETV) pilot programme” as modified by amendment 1 signed 16/06/2014.JRC.F.6-Energy Technology Policy Outloo

EU Environmental Technology Verification pilot programme - Guidance documents: Guidelines for the workflow of documents and information between Verification Bodies, Technical Working Groups and Commission Services

Environmental Technology Verification (ETV) is a new tool to enable the verification of the claims provided by environmental technologies. The Programme is set up foreseeing the existence of Technical Working Groups (TWGs), one for each technology area active under the Pilot programme. These are chaired by the JRC and composed by Commission Invited Experts and by Experts representing the Verification Bodies with the overall aim to harmonise and exchange good practices among member states. This document summarises the outcome of the discussion of the Technical Working Groups concerning the the streamline of information and agrees on a workflow for the communication of documents between Verification Bodies, Technical Working Groups and Commission Services. This document, adopted on the on the 15th October 2013 by the TWGs, is a specific guidance document, with the meaning given in the General Verification Protocol of the EU ETV pilot programme (version 1.0), Section A.II.4.3. It has been produced by the EU ETV Technical Working Groups, chaired by the JRC, under the auspices of DG Environment.JRC.F.6-Energy Technology Policy Outloo