Search results for "sol"
showing 10 items of 23782 documents
Aggressività, isolamento e adattamento: il ruolo della reputazione sociale
2010
Mineral Reactions in the Geological Underground Induced by H2 and CO2 Injections
2014
Abstract The R&D project H2STORE is part of the German program to reduce environmental pollution by energy production and in saving fossil natural resources. Thereby physico-chemical processes in the CO2-H2 system by organic and inorganic reactions receive increasing attention. In H2STORE siliciclastic reservoirs and their caprocks from 25 well sites in Germany and Austria are investigated by different analytical methods before and after H2/CO2 batch experiments under sample specific reservoir conditions (p, T, XFluid). Mineral dissolution, precipitation and their impact on reservoir quality (poro-perm, fluid pathways) and on the generation of methane by microbial metabolism triggered by CO…
Dynamics of hydrofracturing and permeability evolution in layered reservoirs
2015
International audience; A coupled hydro-mechanical model is presented to model fluid driven fracturing in layered porous rocks. In the model the solid elastic continuum is described by a discrete element approach coupled with a fluid continuum grid that is used to solve Darcy based pressure diffusion. The model assumes poro-elasto-plastic effects and yields real time dynamic aspects of the fracturing and effective stress evolution under the influence of excess fluid pressure gradients. We show that the formation and propagation of hydrofractures are sensitive to mechanical and tectonic conditions of the system. In cases where elevated fluid pressure is the sole driving agent in a stable tec…
The dissolution of gypsum of Disueri reservoir left bank
2011
Results of a laboratory research programme on the rate of dissolution of selenitic gypsum are reported and discussed. The tested gypsum samples have been recovered from boreholes drilled in a thick layer outcropping on the left bank of Disueri reservoir located near Gela in Sicily. The tests carried out demonstrate that the rate of dissolution Rd depends essentially upon the velocity v of water flowing over the surface of the gypsum. Values of Rd range from 0.94 to 3 kg/(m2 • day) for v values from 0.05 to 0.20 m/s. Such high rates can account both for the rapid evolution of the existing cavities and for the creation of new caves within the gypsum mass subsequent to the impounding of the re…
Residual a posteriori error estimation for frictional contact with Nitsche method
2023
We consider frictional contact problems in small strain elasticity discretized with finite elements and Nitsche method. Both bilateral and unilateral contact problems are taken into account, as well as both Tresca and Coulomb models for the friction. We derive residual a posteriori error estimates for each friction model, following [Chouly et al, IMA J. Numer. Anal. (38) 2018, pp. 921-954]. For the incomplete variant of Nitsche, we prove an upper bound for the dual norm of the residual, for Tresca and Coulomb friction, without any extra regularity and without a saturation assumption. Numerical experiments allow to assess the accuracy of the estimates and their interest for adaptive meshing …
Importance of psychological factors in adrenocortical functioning and subjective memory complaints
2022
El estrés ha sido considerado uno de los principales problemas de la sociedad actual, ya que se ha relacionado con diversas condiciones de salud mental y física, así como con enfermedades propias de la edad y problemas de memoria. Sin embargo, existen diferencias individuales en la forma en que las personas enfrentan situaciones estresantes. En este sentido, algunas personas, a pesar de estar expuestas a los mismos niveles de estrés, no desarrollan patologías, lo que sugiere que ciertos factores psicológicos podrían actuar como protectores de los efectos del estrés. La resiliencia, que engloba pensamientos positivos y optimistas, ha sido entendida como la capacidad de afrontar la adversidad…
The trouble with vulnerability. Narrating ageing during the COVID-19 pandemic
2023
In this paper, we have used the exceptional circumstances created by the COVID-19 pandemic as a window for investigating the ambivalent, stereotypical and often-incongruent portrayals of exceptional vulnerability and resilient self-management that define the self-constructions available for older adults. From the onset of the pandemic, older adults were publicly and homogenously presented as a biomedically vulnerable population, and the implementation of restrictive measures also raised concerns over their psychosocial vulnerability and wellbeing. Meanwhile, the key political responses to the pandemic in most affluent countries aligned with the dominant paradigms of successful and active ag…
Iso osa nuorista kärsi korona-ajasta : hyvinvointi heikkeni, oppiminen vaikeutui ja yksinäisyys lisääntyi
2023
Nuorten eristäminen pitkäksi aikaa kotiin koronapandemian aikana ei ollut hyvä ratkaisu. Poikkeusoloissakin on keskeistä tukea nuorten yhteisöllisyyttä ja joukkoon kuulumista, apulaisprofessorit Noona Kiuru ja Eija Pakarinen Jyväskylän yliopistosta kirjoittavat. nonPeerReviewed
Asiantuntijat pohtivat korona-ajan kotia
2021
Hiljaisia ääniä : nuorten kokemuksia koronapandemian vaikutuksesta hyvinvointiin, sosiaalisiin suhteisiin ja oppimiseen
2023
Suomen Akatemian yhteydessä toimivan strategisen tutkimuksen neuvoston (STN) rahoittaman Resilientti koulu ja koulutus (EduRESCUE) -hankkeen tutkijoiden kirjoittamassa raportissa tarkastellaan nuorten kokemuksia koronapandemian vaikutuksista hyvinvointiin, sosiaalisiin suhteisiin ja oppimiseen. Erityinen huomio on niin sanottujen ”hiljaisten äänten” kuulemisessa eli sellaisten nuorten kokemuksissa, jotka usein jäävät yhteiskunnallisessa päätöksenteossa huomiotta. Verkkopohjainen kysely laadittiin yhteistyössä eri järjestöjen kanssa. EduRESCUE-hankkeen yhteistyötahot Autismiliitto, HelsinkiMissio, Kuurojen Liitto, Lastensuojelun Keskusliitto, Mannerheimin lastensuojeluliitto, MIELI Suomen Mi…