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Wear protection assessment of ultralow viscosity lubricants in high-power-density engines:A novel wear prediction algorithm

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Friction 2024年第8期12卷 1785-1800页

作者： Javier BlANCO-RODRÍGUEZ Jacobo PORTEIRO JoséA.lÓPEZ-CAMPOS MartíCORTADA-GARCÍA Silvia fernÁndez-CASTEJÓN CINTECX Universidade de VigoLagoas-Marcosende s/nVigo 36310Spain Repsol SA MadridSpain

Durability and reliability have been studied for decades through intensive trial-error ***,there are numerous fields of application where the costs associated with this approach are not *** lubricated machines with severe dynamic loads,such as high-power-density engines,simulation tools offer clear advantages over intensive *** and multiple scenarios can be cost-effectively simulated to assess different lubricants and engine *** work presented here details the study of wear based on a validated elastohydrodynamic(EHD)simulation model of the connecting rod journal *** model accounts for elastic deformation through a connecting rod finite element model(FEM).In addition,multiple lubricant rheological and tribological dependences,determined by specific experimental tests,are applied in the model through their interaction with the simulation ***,a novel wear algorithm is proposed to predict wear depth over time evolution along a proposed wear cycle based on the typical working ranges of high-performance engines.A final assessment is presented to compare 4 different ultralow-viscosity lubricants in their protective performance under severe *** results show the evolution of the wear load and wear depth over the wear *** evaluation is key to describing a lubricant selection procedure for high-power-density engines.

关键词： wear modelling finite element modelling mixed lubrication elastohydrodynamic(EHD) internal combustion engines bearings

Adenosine A2A-dopamine D2 receptor heteromers operate striatal function:impact on Parkinson's disease pharmacotherapeutics

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Neural Regeneration Research 2018年第2期13卷 241-243页

作者： víctor fernández-duenas sergi ferré francisco ciruela unitat de farmacologia departament patologia i terapèutica experimentalfacultat de medicinaidibelluniversitat de barcelonal’hospitalet de llobregatBarcelonaSpain institut de neurociències universitat de barcelonaBarcelonaSpain integrative neurobiology section national institute on drug abuseintramural research programnational institutes of healthBaltimoreMDUSA

The basal ganglia （BG） assemble a series of deep gray matter structures forming recurrent loops that include the cortex and thalamus, and that participate in the regulation of a plethora of brain functions, including elicitation and learning of reward-and aversive stimuli-associated behaviors, motor activity control and sensorimotor gating （Brom- berg-Martin et al., 2010）.

关键词： AR Adenosine A impact on Parkinson’s disease pharmacotherapeutics Figure

Suppression of the External MitochondrialNADPH Dehydrogenase, NDB1, in Arabidopsisthaliana Affects Central Metabolism andVegetative Growth

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Molecular Plant 2014年第2期7卷 356-368页

作者： Sabá V. Wallström Igor Florez-Sarasa Wagner l. Araújo Mari Aidemark María fernández-fernández Alisdair R. fernie Miquel Ribas-Carbó Allan G. Rasmusson Department of Biology Lund University Biology building Sölvegatan 35 SE-223 62 Lund Sweden Grup de Recerca en Biologia de les Plantes en Condicions Mediterrànies Universitat de les Illes Balears Ctra Valldemossa Km. 75 07122 Palma de Mallorca Spain Present address: Max-Planck-Institut für Molekulare Pflanzenphysiologie Am Mühlenberg 1 14476 Potsdam-Golm Germany Max-Planck-Institut für Molekulare Pflanzenphysiologie Am Mühlenberg 1 14476 Potsdam-Golm Germany Present address: Departamento de Biologia Vegetal Universidade Federal de Viçosa 36570-000 Viçosa Minas Gerais Brasil

Ca2＋-dependent oxidation of cytosolic NADPH is mediated by NDB1, which is an external type II NADPHdehydrogenase in the plant mitochondrial electron transport chain. Using RNA interference, the NDB1 transcript wassuppressed by 80% in Arabidopsis thaliana plants, and external Ca2＋-dependent NADPH dehydrogenase activity becameundetectable in isolated mitochondria. This was linked to a decreased level of NADP＋ in rosettes of the transgenic ***-grown transgenic seedlings displayed decreased growth specifically on glucose, and respiratory metabolism of 14C-glucose was increased. On soil, NDBl-suppressing plants had a decreased vegetative biomass, but leaf maximumquantum efficiency of photosystem Ⅱ and CO2 assimilation rates, as well as total respiration, were similar to the wild-type. The in vivo alternative oxidase activity and capacity were also similar in all genotypes. Metabolic profiling revealeddecreased levels of sugars, citric acid cycle intermediates, and amino acids in the transgenic lines. The NDBl-suppressioninduced transcriptomic changes associated with protein synthesis and glucosinolate and jasmonate metabolism. Thetranscriptomic changes also overlapped with changes observed in a mutant lacking ABAINSENSITIVE4 and in A. thalianaoverexpressing stress tolerance genes from rice. The results thus indicate that A. thaliana NDB1 modulates NADP（H）reduction levels, which in turn affect central metabolism and growth, and interact with defense signaling.

关键词： citric acid cycle metabolic profiling mitochondrial respiration NADPH RNA interference type II NAD(P)Hdehydrogenase vegetative growth

Transport coefficients of a massive pion gas

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Chinese Physics C 2010年第9期34卷 1453-1455页

作者： D.fernández-Fraile A.Gómez Nicola Institut für Theoretische Physik Johann Wolfgang Goethe-Universitt Departamento de Física Teórica II Universidad Complutense

We review our main results concerning the transport coefficients of a light meson gas,in particular we focus on the case of a massive pion *** order results according to the chiral power-counting are presented for the DC electrical conductivity,thermal conductivity,shear viscosity,and bulk *** also comment on the possible correlation between the bulk viscosity and the trace anomaly in QCD,as well as the relation between unitarity and a minimum of the quotient η/s near the phase transition.

关键词： transport coefficients heavy-ion collisions Chiral Perturbation Theory

The inception of a Paleotethyan magmatic arc in Iberia

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Geoscience Frontiers 2015年第2期6卷 297-306页

作者： M.F.Pereira A.Castro C.fernández IDl Departamento de Geociências ECT Universidade de évora Departamento de Geología Universidad de Huelva Departamento de Geodinámica y Paleontología Universidad de Huelva

This paper presents a compilation of recent U-Pb （zircon） ages of late Carboniferous-early Permian （lC EP） calc-alkaline batholiths from lberia, together with a petrogenetic interpretation of magma generation based on comparisons with Mesozoic and Tertiary Cordilleran batholiths and experimental melts. Zircon U-Pb ages distributed over the range ca. 315-280 Ma, indicate a linkage between calc-alkaline magmatism, Iberian orocline generation and Paleotethys subduction. It is also shown that Iberian lC-EP calcalkaline batholiths present unequivocal subduction-related features comparable with typical Cordilleran batholiths of the Pacific Americas active margin, although geochemical features were partially obscured by local modifications of magmas at the level of emplacement by country rock assimilation. When and how lC-EP calc-alkaline batholiths formed in Iberia is then discussed, and a new and somewhat controversial interpretation for their sources and tectonic setting （plume-assisted relamination） is suggested. The batholiths are proposed to have formed during the subduction of the Paleotethys oceanic plate （Pangaea self-subduction） and, consequently, they are unrelated to Variscan collision. The origin of the Iberian batholiths is related to the Eurasian active margin and probably represents the inception of a Paleotethvan arc in the core of Pangaea.

关键词： Permo-Carboniferous Calc-alkaline arc-related batholiths Pangaea Paleotethys subduction Variscan and Cimmerian cycles

A short review of malabsorption and anemia

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World Journal of Gastroenterology 2009年第37期15卷 4644-4652页

作者： fernando fernández-Baares Helena Monzón Montserrat Forné Department of Gastroenterology Hospital Universitari Mutua Terrassa University of Barcelona Plaza Dr Robert 5 08221 Terrassa Barcelona Spain

Anemia is a frequent finding in most diseases which cause malabsorption. The most frequent etiology is the combination of iron and vitamin B12 deficiency. Celiac disease is frequently diagnosed in patients referred for evaluation of iron deficiency anemia (IDA), being reported in 1.8%-14.6% of patients. Therefore, duodenal biopsies should be taken during endoscopy if no obvious cause of iron defi ciency (ID) can be found. Cobalamin defi ciency occurs frequently among elderly patients, but it is often unrecognized because the clinical manifestations are subtle; it is caused primarily by food-cobalamin malabsorption and pernicious anemia. The classic treatment of cobalamin deficiency has been parenteral administration of the vitamin. Recent data suggest that alternative routes of cobalamin administration (oral and nasal) may be useful in some cases. Anemia is a frequent complication of gastrectomy, and has been often described after bariatric surgery. It has been shown that banding procedures which maintain digestive continuity with the antrum and duodenum are associated with low rates of ID. Helicobacter pylori (H pylori) infection may be considered as a risk factor for IDA, mainly in groups with high demands for iron, such as some children and adolescents. Further controlled trials are needed before making solid recommendations about H pylori eradication in these cases.

关键词： Anemia Celiac disease Helicobacter pylori Cobalamin deficiency Gastrectomy

Interferometric orbit determination for geostationary satellites

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Science China(Information Sciences) 2017年第6期60卷 22-32页

作者： Roger M.FUSTER Marc fernndez USóN Antoni BROQUETAS IBARS Remote Sensing laboratory Department of Signal and Communications TheoryUniversitat Politècnica de Catalunya

Future Geo SAR missions are expected to provide higher resolution radar images featuring shorter revisit times by locating a radar payload on-board of a geostationary satellite. One of the main challenges in Geo SAR processing is accurately determining the satellite orbit to obtain a precise phase history, in order to properly focus the retrieved data. To tackle this challenge, a multiple baseline ground-based interferometer is proposed as a compact and reliable method to achieve an unprecedented accuracy. As a proof of concept, this paper presents the results obtained from a single baseline prototype, whose results can be extrapolated to a larger system, able to be used in future missions.

关键词： GeoSAR interferometry orbit determination geostationary SAR

Interpolation of Ideal Measures by Abstract K and J Spaces

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Acta Mathematica Sinica,English Series 2007年第8期23卷 1357-1374页

作者： luz M.fernndez-CABRERA Antón MARTíNEZ Sección Departamental de Matemática Aplicada Escuela de EstadísticaUniversidad Complutense de Madrid28040 MadridSpain Departamento de Matemática Aplicada I E.T.S.Ingenieros IndustrialesUniversidad de Vigo36200

We work with the abstract K and J interpolation method generated by a sequence lattice Г. We investigate the deviation of an interpolated operator from a given operator ideal by establishing formulae for the ideal measure of the interpolated operator in terms of the ideal measures of restrictions of the operator. Formulae are given in terms of the norms of the shift operators on Г.

关键词： real interpolation ideal measures operator ideals shift operators

Design of a Socially Inclusive Climate Risk Transfer Mechanism:A Case Study in la Guajira,Colombia

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International Journal of Disaster Risk Science 2024年第4期15卷 565-578页

作者： Cristian Camilo fernández lopera JoséManuel Mendes Eduardo Jorge Barata Centre for Social Studies Institute for Interdisciplinary ResearchUniversity of Coimbra3000-995 CoimbraPortugal Faculty of Economics Centre for Social StudiesUniversity of Coimbra3000-995 CoimbraPortugal Faculty of Economics CeBERUniversity of Coimbra3004-512 CoimbraPortugal

The primary aim of this study was to develop a model of a socially inclusive climate risk insurance(CRI) mechanism based on the differential risk transfer approach. This study focused on the department of la Guajira, Colombia, as a case *** Guajira is the department in Colombia that, due to its critical disaster risk conditions, presents the adequate configuration for implementing a climate risk transfer mechanism. The article starts by analyzing risk conditions by using secondary data. Based on fieldwork, this research explored the perspectives of the most vulnerable sectors in la Guajira Department on the socioeconomic impacts and needs they experience regarding climate-related hazards, their adaptive measures for risk reduction, and their willingness to adopt CRI. This represents the fundamental input for the formulation of the CRI model. Consequently, this research proposed an operational structure as input for future implementations of the model. The results indicate that national and local disaster risk management public policies align with the sectors' needs and priorities. Strengthening sectoral associations can enhance representation in CRI projects. In-kind indemnization is preferred for women entrepreneurs and the indigenous community. The CRI model includes a risk pool through the family compensation fund of la Guajira as a sectoral agglomerator, with contingent credit and traditional/parametric insurance. The methodology developed in this study can be applied in different contexts worldwide as a guidance for informing national and international climate risk finance initiatives.

关键词： Colombia Disaster risk fnancing Disaster risk management la Guajira Climate risk insurance Socioeconomic vulnerability