Search results for "gaz"
showing 10 items of 624 documents
Impact of cyclic mechanical stress on the electrical contact resistance between gas diffusion layer and bipolar plates in Polymer Electrolyte Membran…
2018
WHEC 2018, 22nd edition of the WORLD HYDROGEN ENERGY CONFERENCE, Rio de Janeiro, BRESIL, 17-/06/2018 - 22/06/2018; and collisions) and the mechanical clamping stress applied during the stack assembly. The internal stresses come from the shrinking and the swelling of the membrane caused by water content and the difference between the thermal expansion coefficients of the cell components. These mechanical stresses have an impact on the global fuel cell's performance and one of the most sensitive cell's components to this pressure is the Gas Diffusion Layer (GDL). This layer, assembled with the membrane electrode assembly, provides the reactant gases, evacuates the produced heat and …
Water Conflict and Water Management in the Middle East
2004
“Water is Life”: this is often forgotten in countries with abundant water ressources. As a ressource it only gains importance once it is in short supply or once its quality declines. In the case of shortage the battle for water becomes inevitable. At the moment we have up to 200 conflicts of border-crossing water systems in the world. The Middle East is considered to be a typical example of this politically significant problem
Sad, lonely and looking for love? : representations of singleness on Cosmopolitan.com
2016
Yhdysvaltalaisessa yhteiskunnassa arvostetaan suuresti avioliittoa ja parisuhdetta, jonka ajatellaan olevan elämän tärkein ihmissuhde. Vaikka yksineläjien määrä on viimeisten vuosikymmenien aikana ollut kasvussa, asenteet yksineläjiä ja yksineläjyyttä kohtaan ovat silti usein negatiivisia ja kyseenalaistamattomia. Niihin liittyvät negatiiviset stereotypiat heijastuvat mediarepresentaatioissa. Se, miten media puhuu yksineläjyydestä ja parisuhteista vaikuttaa ihmisten ajatusmaailmoihin sekä olemassa oleviin diskursiivisiin resursseihin, joiden avulla yksineläjät voivat käsitellä elämäänsä ja rakentaa identiteettiään. Tämä tutkielma tarkastelee yksineläjyyden representaatioita nuorille naisill…
SU ALCUNE QUESTIONI PROCESSUALI INERENTI LA LIMITAZIONE DELLA RESPONSABILITA' ARMATORIALE E PROFILI DI ILLEGITTIMITA' COSTITUZIONALE DELL'ART. 627 CO…
2008
PASSENGER NAME RECORD (PNR)
2018
Lo scritto prende in esame la questione relativa al trattamento e al trasferimento dei dati personali dei passeggeri (PNR) nel trasporto aereo, con lo scopo di combattere il terrorismo internazionale e la criminalità transnazionale. La questione è stata molto dibattuta a livello europeo, a partire dal primo accordo tra USA-Ue nel 2004, poi abrogato dalla Corte di giustizia Ue, sino ai tempi più recenti, con l’approvazione della direttiva 681/2016 e il parere 1/15 del 2017 della Corte di giustizia sulla compatibilità tra l’accordo Ue-Canada e il vigente quadro normativo dell’Ue, successivo all’entrata in vigore del trattato di Lisbona e della Carta dei diritti fondamentali dell’Unione europe…
Le abrogazioni
2001
Il saggio esamina le questioni collegate alle abrogazioni disposte dalla c.d. Legge Brunetta
Enhanced tonic GABAA inhibition in typical absence epilepsy
2009
The cellular mechanisms underlying typical absence seizures, which characterize various idiopathic generalized epilepsies, are not fully understood, but impaired γ-aminobutyric acid (GABA)-ergic inhibition remains an attractive hypothesis. In contrast, we show here that extrasynaptic GABAA receptor–dependent 'tonic' inhibition is increased in thalamocortical neurons from diverse genetic and pharmacological models of absence seizures. Increased tonic inhibition is due to compromised GABA uptake by the GABA transporter GAT-1 in the genetic models tested, and GAT-1 is crucial in governing seizure genesis. Extrasynaptic GABAA receptors are a requirement for seizures in two of the best character…
Iron and pH regulating the photochemical mineralization of dissolved organic carbon
2017
Solar radiation mineralizes dissolved organic matter (DOM) to dissolved inorganic carbon through photochemical reactions (DIC photoproduction) that are influenced by iron (Fe) and pH. This study addressed as to what extent Fe contributes to the optical properties of the chromophoric DOM (CDOM) and DIC photoproduction at different pH values. We created the associations of Fe and DOM (Fe-DOM) that cover the range of loadings of Fe on DOM and pH values found in freshwaters. The introduced Fe enhanced the light absorption by CDOM independent of pH. Simulated solar irradiation decreased the light absorption by CDOM (i.e., caused photobleaching). Fe raised the rate of photobleaching and steepened…