The Evolution of Municipal Waste Management in Europe: how Different are National Regimes

International audienceThe 1994 European directive on packaging waste let a diversity of conceptions of waste management to be developed and tested by reality in various countries. Such a diversity may raise drawbacks related to the achievement of the single market and the European law of competition. The paper describes the main differences in the regimes in five countries: France, Germany, the Netherlands, Italy and Greece. This comparative approach allows to identify four main variables in order to characterise policy regimes, which explain the degree of orientation of waste regimes to cost-effectiveness. A second result is to show that, in each country, implementation has resulted in learning, correction and self-regulation, which have reduced the initial divergences between national regimes. So an efficient harmonisation may be unexpectedly achieved by such a soft way without passing stringent European directives. Moreover, by playing the option of experimenting competing organisational and policy concepts, this approach of the European harmonisation would allow to reveal in 2004 the cost-effectiveness of alternative solutions at a moment when the European policy has to be reconsidered

Inkjet-printed piezoelectric films for transducers

Lead zirconate titanate (PZT) thin films are a popular choice for piezoelectric devices such as microelectromechanical systems, micro-pumps, micro-mirrors or energy harvesters. Various fabrication techniques exist for the deposition of PZT in the form of thin films. Physical vapor deposition (PVD) methods are particularly cost-intensive, as they require vacuum conditions and expensive infrastructure. Fabrication costs can be decreased by the use of chemical solution deposition (CSD), where the metal precursors are dispersed in a solvent medium and coated onto a substrate. Thermal treatments convert the liquid precursor into a functional solid film. Spin coating is a conventional coating technique allowing for the deposition of homogeneous layers over large-area substrates. However, it is inherently wasteful, as most of the precursor material is spun off the substrate in the coating process. In addition, as spin coating results in complete coverage of the substrate, layer patterning requires lithography, which adds up extra steps and costs to the overall process. Inkjet printing is an additive manufacturing technique that has the potential to address both of these issues, thus further decreasing manufacturing costs and the associated ecological footprint. The working principle of inkjet printing can be described as the deposition of individual ink droplets at digitally determined locations on the substrate surface, which then merge into a continuous film. Inkjet printing is compatible with CSD processing of PZT thin films, as demonstrated by the previous works in the field. However, the adaptation of standard CSD processing for inkjet printing comes with several challenges, which have to be considered to obtain state-of-the-art functional PZT layers. In the present work, we explore several issues related to the processing of PZT thin films by inkjet printing and we provide possible solutions to address them, in a way that had not been described yet by the state of the art. In particular, we describe a novel strategy that uses inkjet-printed alkanethiolate-based self-assembled monolayers for direct patterning of PZT thin films on platinized silicon. Then, we present a systematic study of the pyrolysis step of the process, which enabled us to print dense and textured layers with state-of-the-art electrical properties. We also developed a proof-of-concept piezoelectric energy harvesting device based on inkjet-printed PZT films. Finally, we unveil a comparative study where we identified an alternative solvent for CSD processing of PZT thin films

Conception efficace de soufflante sous distorsion d'entrée d'air

International audienceDesigning a turbofan to operate in distorted inlet conditions is an issue of growing interest. In such conditions however, fan design can be computationally challenging. Indeed, subject to neither axi-symmetrical nor periodic inlet conditions, computations must be carried out throughout the whole circumferential domain i.e. 360 •. Besides, the classical CFD approach implies the use of URANS computations so as to capture the distortion transfer across the fan stage. Eventually, computations are too onerous to be used in design loops. In this context, this paper presents a methodology to effectively assess a fan blade design domain in distorted conditions. This methodology is based on a body-force source term approach formulated in order to accurately recreate deviations, loads and losses across the fan stage. It notably enables to gain two orders in terms of restitution time and thus the possibility to use optimization tools. The design domain of this study is based on variations of profile chord, blade leading and trailing edges angles applied at two different relative heights. A Latin Hypercube Sampling (LHS) associated with a meta-model based on Radial Basis Functions (RBF) enables to assess the impact of geometric variations on performance and operability. Although this study emphasizes that some modeling improvements are still necessary, it also demonstrates the potential of the body-force methodology to conduct fan design when subject to inlet distortion.La conception de soufflante sous distorsion d'entrée d'air est un problème de plus en plus abordé. Cependant, sous ces conditions, les simulations de soufflante peuvent être complexes. En effet, sous conditions ni périodiques ni axisymétriques, les simulations doivent a priori être exécutée sur l'ensemble de la circonférence. Cela impose aussi l'utilisation de méthodes instationnaires type U-RANS afin de reproduire le transfère de la distorsion à travers l'étage. En partant de ce contexte, cette publication présente une méthodologie efficace pour mener une conception de soufflante sous distorsion d'entrée d'air. Cette méthodologie se base sur l'utilisation de termes sources alias "body-force" afin de correctement reproduire les effets de déviation, de charge et de pertes à travers l'étage de soufflante. Cela permet en outre une diminution du temps de simulation de deux ordres de grandeur et ainsi l'utilisation de méthodologie d'optimisation. Le domaine de conception de cette étude inclut des variations d'angle squelette de bord d'attaque et de bord de fuite ainsi que des variations de corde sur deux hauteurs de contrôle. Une surface de réponse définie par une méthode LHS associée à un méta-modèle basé sur des fonctions RBF ont permis d'évaluer l'impact de variations géométriques sur les performances et l'opérabilité d'une soufflante UHBR sous distorsion de pression d'arrêt. Bien que cette étude conclut sur le fait que de nombreux points sont à perfectionner, elle démontre aussi le fort potentiel de ces méthodes "body-force" au sein des bureau d'étude des concepteurs de soufflante, notamment lorsque les conditions à l'amont ne sont plus homogènes

Clinical practice guidelines: Medical follow-up of patients with asthma—Adults and adolescents

SummaryThe follow-up of patients with asthma should focus on asthma control (disease course over a number of weeks)→ There are 3 levels of asthma control•Acceptable:All control criteria (Table 1 below) are met•Unacceptable:One or more criteria are not met•Optimal:All control criteria are normal or, in a patient with acceptable control, the best compromise has been achieved between degree of control, acceptance of treatment and possible side effectsTable 1 Criteria defining acceptable asthma control.CriterionValue or frequency*Day-time symptoms<4 days/weekNight-time symptoms<1 night/weekPhysical activityNormalExacerbationsMild, infrequentAbsence from work or schoolNoneUse of short-acting β2-agonists<4 doses/weekFEV1 or PEF>85% of personal bestPEF diurnal variation (optional)<15%*Mean during control assessment period (1 week–3 months).FEV: forced expiratory volume; PEF: peak expiratory flow.→ Follow-up includes monitoring of treatment side effects and adherence.→ Treatment should be adjusted to level of control and current long-term therapy.•If control is unacceptable:○Check: that the disease is asthma, adherence, correct use of inhalation devices.○Look for and treat: aggravating factors, concomitant disease, specific clinical forms.○Adjust long-term therapy (see Table 2 below) in steps of 1–3 months.•If control is acceptable or optimal:○Find the minimum effective treatment to maintain at least acceptable and ideally optimal control. Each step should last 3 months.Table 2 Adjusting long-term therapy if control is unacceptable.Current therapyNew treatmentaOption 1Option 2No ICSAverage-dose ICSAverage ICS dose+AMbPatients on ICS onlyLow- or average-dose ICSAdd AMIncrease ICS dose with or without AMHigh-dose ICSAdd AMPatients on ICS and additional medication (AM)Low dose of ICS (+1 AM)Increase ICS doseAverage dose of ICS (+1 AM)Increase ICS doseAdd second AM with or without increasing ICS doseHeavy dose of ICS (+1 AM)Add second AMOral corticosteroidscHeavy dose of ICS (+2 AMs)Oral corticosteroidscAdd third AMaThe choice between options will depend on symptom frequency and respiratory function (particularly post-bronchodilator FEV1).bAdditional medication (AM) covers long-acting β2-agonists, cysteinyl-leukotriene receptor antagonists, theophylline and its derivatives (bamiphylline).cOral corticosteroids are rarely used in adolescents.→ Frequency of follow-up visits (V) and lung function tests (LFTs) according to the dose of inhaled corticosteroids (ICS) needed for acceptable control (see Table 3 below)Table 3 Frequency of follow-up visits and LFTs.ICS doseV (months)LFT (months)High33–6Low or average66–12None1212 or +Low, average and high daily dose of ICS (μg/day) in adults.Low doseAverage doseHigh doseBeclomethasonea<500500–1000>1000Budesonide<400400–800>800Fluticasone<250250–500>500aDose should be halved for QVAR® and NEXXAIR®SynopsisTitleMedical follow-up of patients with asthma—adults and adolescentsPublication dateSeptember 2004Requested byFrench National Health DirectorateProduced byAnaes—French National Agency for Accreditation and Evaluation in Healthcare (Guidelines Department)Intended forAll health professionals who manage patients with asthmaAssessment method•Systematic review of the literature (with evidence levels)•Discussion among members of an ad hoc working group•External validation by peer reviewers (see Anaes guide “Recommandations pour la pratique clinique—base méthodologique pour leur réalisation en France—1999”)ObjectivesAddress the practical aspects of long-term medical follow-up of patients with asthma (adults and adolescents only)Literature searchJanuary 1997–December 20032957 articles identified of which 696 analysedEconomic studyNoneAnaes project leader(s)Dr. Philippe Martel (Department head: Dr. Patrice Dosquet)(Literature search: Emmanuelle Blondet with the help of Maud Lefèvre (Department head: Rabia Bazi); secretarial work: Elodie Sallez)Authors of draft reportDr. Hugues Morel, chest physician, DinanDr. Nicolas Roche, chest physician, ParisCollaborations and participants•Learned societies•Steering committee•Working group (Chair: Professor Philippe Godard, chest physician/allergologist, Montpellier)•Peer reviewers(Appendix A)Internal validationAnaes Scientific Council (Referees: Professor Bruno Housset, chest physician, Créteil; Michel Paparemborde, Head of physiotherapy training college, Lille)Validated on September 2, 2004Other Anaes publications on the topicMedical follow-up is complemented by ongoing patient education, which is dealt with in the guidelines “Therapeutic education for patients with asthma—adults and adolescents” (Anaes 2001

Closed-loop separation control over a sharp edge ramp using Genetic Programming

We experimentally perform open and closed-loop control of a separating turbulent boundary layer downstream from a sharp edge ramp. The turbulent boundary layer just above the separation point has a Reynolds number $Re_{\theta}\approx 3\,500$ based on momentum thickness. The goal of the control is to mitigate separation and early re-attachment. The forcing employs a spanwise array of active vortex generators. The flow state is monitored with skin-friction sensors downstream of the actuators. The feedback control law is obtained using model-free genetic programming control (GPC) (Gautier et al. 2015). The resulting flow is assessed using the momentum coefficient, pressure distribution and skin friction over the ramp and stereo PIV. The PIV yields vector field statistics, e.g. shear layer growth, the backflow area and vortex region. GPC is benchmarked against the best periodic forcing. While open-loop control achieves separation reduction by locking-on the shedding mode, GPC gives rise to similar benefits by accelerating the shear layer growth. Moreover, GPC uses less actuation energy.Comment: 24 pages, 24 figures, submitted to Experiments in Fluid

The NAOMI GAZL multispecies differential absorption lidar: realization and testing on the TADI gas leak simulation facility

International audienceWe report on a differential absorption lidar, designed for remote detection of CH 4 and CO 2 , based on a single-frequency 1.57-1.65 µm parametric oscillator/amplifier system. The lidar is tested on a controlled gas release facility

Development of Phenalenone-Triazolium Salt Derivatives for aPDT: Synthesis and Antibacterial Screening

The increasing number of hospital-acquired infections demand the development of innovative antimicrobial treatments. Antimicrobial photodynamic therapy (aPDT) is a versatile technique which relies on the production of reactive oxygen species (ROS) generated by light-irradiated photosensitizers (PS) in the presence of oxygen (O2). 1H-Phenalen-1-one is a very efficient photosensitizer known for its high singlet oxygen quantum yield and its antimicrobial potential in aPDT when covalently bound to quaternary ammonium groups. Triazolium salts are stable aromatic quaternary ammonium salts that recently appeared as interesting moieties endowed with antimicrobial activities. The coupling between phenalenone and triazolium groups bearing various substituents was realized by copper-catalyzed azide-alkyne cycloaddition followed by alkylation with methyl iodide or 2-(bromomethyl)-1H-phenalen-1-one. As expected, most of the compounds retained the initial singlet oxygen quantum yield, close to unity. Minimum inhibitory concentrations (MIC) of 14 new phenalenone-triazolium salt derivatives and 2 phenalenone-triazole derivatives were determined against 6 bacterial strains (Gram-negatives and Gram-positives species). Most of these PS showed significant photoinactivation activities, the strongest effects being observed against Gram-positive strains with as low as submicromolar MIC values.EU Framework Programme Horizon 202

Masirah – The other Oman ophiolite: A better analogue for mid-ocean ridge processes?

Oman has two ophiolites – the better known late Cretaceous northern Oman (or Semail) ophiolite and the lesser known and smaller, Jurassic Masirah ophiolite located on the eastern coast of the country adjacent to the Indian Ocean. A number of geological, geochronological and geochemical lines of evidence strongly suggest that the northern Oman ophiolite did not form at a mid-ocean ridge but rather in a supra-subduction zone setting by fast spreading during subduction initiation. In contrast the Masirah ophiolite is structurally part of a series of ophiolite nappes which are rooted in the Indian Ocean floor. There are significant geochemical differences between the Masirah and northern Oman ophiolites and none of the supra-subduction features typical of the northern Oman ophiolite are found at Masirah. Geochemically Masirah is MORB, although in detail it contains both enriched and depleted MORB reflecting a complex source for the lavas and dykes. The enrichment of this source predates the formation of the ophiolite. The condensed crustal section on Masirah (ca 2 km) contains a very thin gabbro sequence and is thought to reflect its genesis from a cool mantle source associated with the early stages of sea-floor spreading during the early separation of eastern and western Gondwana. These data suggest that the Masirah ophiolite is a suitable analogue for an ophiolite created at a mid-ocean ridge, whereas the northern Oman ophiolite is not. The stratigraphic history of the Masirah ophiolite shows that it remained a part of the oceanic crust for ca 80 Ma. The chemical variability and enrichment of the Masirah lavas is similar to that found elsewhere in Indian Ocean basalts and may simply reflect a similar provenance rather than a feature fundamental to the formation of the ophiolite.University of Derb

Petrogenesis of crustal wehrlites in the Oman ophiolite: Experiments and natural rocks

In the Wadi Haymiliyah of the Oman ophiolite (Haylayn block), discordant wehrlite bodies ranging in size from tens to hundreds of meters intrude the lower crust at different levels. We combined investigations on natural wehrlites from the Wadi Haymiliyah section with an experimental study on the phase relations in a wehrlitic system in order to constrain the petrogenesis of the crustal wehrlites of the Oman ophiolite. Secondary ion mass spectrometry analyses of clinopyroxenes from different wehrlite bodies imply that the clinopyroxenes were crystallized from tholeiitic, mid-ocean ridge (MORB)–type melts. The presence of primary magmatic amphiboles in some wehrlites suggests a formation under hydrous conditions. Significantly enhanced 87Sr/86Sr isotope ratios of separates from these amphiboles imply that the source of the corresponding magmatic fluids was either seawater or subduction zone–related. The experiments revealed that under wet conditions at relatively low temperatures, a MORB magma has the potential to produce wehrlite in the ocean crust by accumulation of early olivine and clinopyroxene. These show typically high Mg# which is a consequence of the oxidizing effect of the prevailing high aH2O. First plagioclases crystallizing after clinopyroxene under wet conditions are high in An content, in contrast to the corresponding dry system. Trace element compositions of clinopyroxenes of those wehrlites from the Moho transition zone are too depleted in HREE to be in equilibrium with present-day MORB, implying a genetic relation to the V2 lavas of the Oman ophiolite, which are interpreted to be the result of fluidenhanced melting of previously depleted mantle. We present a model on the petrogenesis of the crustal wehrlites in an upper mantle wedge above an initial, shallow subduction zone at the beginning of the intraoceanic thrusting