Ru–CeO2 and Ni–CeO2 Coated on Open-Cell Metallic Foams by Electrodeposition for the CO2 Methanation

CO2 methanation structured catalysts, made by a layer of Ru–CeO2 or Ni–CeO2 (Ru/Ce = 3/97; Ni/Ce = 1/3 and 3/1) on open-cell NiCrAl foams, are prepared by electrodeposition and a subsequent calcination step. The performance of the catalysts at a space velocity of 320,000 mL gcat–1 h–1 in a feedstock with H2/CO2/N2 = 4/1/1 v/v, significantly depends on the Ni content and the preparation method. A low Ru or Ni content promotes the metal–CeO2 interaction, the formation of defects in CeO2 as well as the development of a lower amount of cracks in the coating; however, the catalysts show a poor CO2 conversion and selectivity to CH4. The CH4 production rate at low temperature largely increases for the high Ni loaded catalyst, 68.7 LCH4 gNi–1 h–1 at 350 °C oven temperature. This productivity is similar to the value obtained with a Ni3Ce1 pellet catalyst prepared by the coprecipitation method, a behavior not achievable for low Ru- and Ni-loaded catalysts

La felicidad de los millennials en Lima Metropolitana, 2018

La felicidad ha sido materia de estudio por diferentes investigadores internacionales y en el Perú no se encuentran muchas investigaciones respecto a este tema. Por esta razón, la presente investigación tuvo como objetivo identificar el nivel de felicidad de los millennials de Lima Metropolitana en el año 2018. Para lograr este objetivo, se realizó un estudio de investigación cuantitativo utilizando como instrumento La Escala de Felicidad de Lima elaborada por Reynaldo Alarcón con 27 preguntas, en la cual se consideran cuatro dimensiones: (a) sentido positivo de la vida, (b) satisfacción con la vida, (c) realización personal, y (d) la alegría de vivir. Estas encuestas fueron aplicadas en cuatro centros comerciales y dio como resultado que el nivel de felicidad de los millennials de Lima Metropolitana fue de 104.75 considerado como alto de un total máximo de 135 puntos. Además, se obtuvieron resultados entre distintos aspectos demográficos de la muestra resaltando que no existe mayor diferencia en el nivel de felicidad por segmento geográfico, rango de edad y género; caso contrario con el nivel socioeconómico (NSE) y la ocupación actual de los encuestados. Adicionalmente, se realizaron cuatro entrevistas con la finalidad de profundizar los resultados de uno del grupo de millennials que no trabajan ni estudian y que tienen uno de los menores niveles de felicidad. Estos resultados han servido para entender las motivaciones de los millennials y establecer un plan de acción, el cual será de utilidad para la Municipalidad de Lima y otras instituciones interesadas en el tema. Esta propuesta comprende cuatro factores como: (a) Salud, Deporte y Cultura; (b) Empleo, (c) Turismo, y (d) Medio ambiente, que servirán para incrementar el nivel de Felicidad de los millennials en Lima y así replicarlas en el Perú.Different international researchers have investigated the concept of HAPPINESS as it relates to different factors. In Peru however, there is not much research probing into this issue. For that reason, the goal of this research is to identify the level of happiness of the millennials residing in the metropolitan area of Lima in 2018. In order to achieve this goal, we conducted quantitative research using, as an instrument, “The Happiness Scale of Lima” created by Reynaldo Alarcón. This scale consists of 27 questions encapsulating four categories. The four categories taken into consideration were: (a) Positive sense of life, (b) Satisfaction with life, (c) personal accomplishment and (d) the joy of living. This survey was taken in four shopping malls and the quantitative results for the level of happiness of millennials in Metropolitan Lima was 104.75 out of a possible maximum total of 135 points. Also, results were obtained between differing demographic samples. A comparison of findings between these varying samples identified that there were no significant differences in the level of happiness between the localities, age range or gender. However, it was found that one’s occupation and Socioeconomic Level, (NSE) did affect the level of happiness among the surveyed. To verify these findings of the research, four additional interviews were conducted with a millennial group who do not work or study and it was found that they had a significantly lower level of happiness than our baseline results. These research results have helped us to understand the motivations of the millennials and to establish an action plan which will be useful to the Municipality of Lima and other institutions to which these finding will be valuable. There are four components to this study: (a) Health, Sport and Culture, (b) Employment, (c) Tourism and (d) Environment, which will serve to increase the level of happiness of the millennials in Lima. By extension, the ability to replicate these components in other areas in Peru will create greater happiness and prosperity throughout the country.Tesi

Search for dark matter produced in association with bottom or top quarks in √s = 13 TeV pp collisions with the ATLAS detector

A search for weakly interacting massive particle dark matter produced in association with bottom or top quarks is presented. Final states containing third-generation quarks and miss- ing transverse momentum are considered. The analysis uses 36.1 fb−1 of proton–proton collision data recorded by the ATLAS experiment at √s = 13 TeV in 2015 and 2016. No significant excess of events above the estimated backgrounds is observed. The results are in- terpreted in the framework of simplified models of spin-0 dark-matter mediators. For colour- neutral spin-0 mediators produced in association with top quarks and decaying into a pair of dark-matter particles, mediator masses below 50 GeV are excluded assuming a dark-matter candidate mass of 1 GeV and unitary couplings. For scalar and pseudoscalar mediators produced in association with bottom quarks, the search sets limits on the production cross- section of 300 times the predicted rate for mediators with masses between 10 and 50 GeV and assuming a dark-matter mass of 1 GeV and unitary coupling. Constraints on colour- charged scalar simplified models are also presented. Assuming a dark-matter particle mass of 35 GeV, mediator particles with mass below 1.1 TeV are excluded for couplings yielding a dark-matter relic density consistent with measurements

Produzione e caratterizzazione di compositi sostenibili da fibra di carbonio e polipropilene di riciclo

Il presente lavoro di tesi vuole indagare le principali proprietà meccaniche e termiche di un composito in polipropilene (rPP) e fibra di carbonio (rCF), entrambi di riciclo. Perciò, sono stati realizzati differenti compositi rPP/rCF rinforzati con due diversi tipi di fibra di carbonio e con differente percentuale di rinforzo. I provini prodotti sono stati analizzati mediante analisi DSC, TGA, DMA e testati in macchina di prova universale. I risultati suggeriscono la possibilità di sostituire, per alcune applicazioni, le fibre di carbonio vergini con più economiche fibre di carbonio di riciclo senza pregiudicare significativamente le proprietà del materiale, e con beneficio su costo e sostenibilità del composito

BAG3 protein regulates cell-survival in childhood acute lymphoblastic leukemia cells.

Letter to the Edito