235 research outputs found
Forward and Inverse Dynamics and Quasi-Static Analysis of Mechanizes with MATLAB®
There are many potential advantages of direct and inverse dynamic and quasi-static analysis of mechanisms, namely control the risk of slippage, improve stability, better adaptation to the environment, obtaining smooth movements and optimizing energy consumption. This chapter proposes new analysis methods and algorithms to bring new solutions to the mechanics of the machines under consideration. The methodology has been developed in modular programs thanks to the flexibility of MATLAB®
Stationary Zonal Flows during the Formation of the Edge Transport Barrier in the JET Tokamak
High spatial resolution Doppler backscattering measurements in JET have enabled new insights into the
development of the edge Er. We observe fine-scale spatial structures in the edge Er well with a wave
number krρi ≈ 0.4–0.8, consistent with stationary zonal flows, the characteristics of which vary with density. The zonal flow amplitude and wavelength both decrease with local collisionality, such that the zonal flow E × B shear increases. Above the minimum of the L-H transition power threshold dependence on density, the zonal flows are present during L mode and disappear following the H-mode transition, while below the minimum they are reduced below measurable amplitude during L mode, before the L-H transitionEURATOM 63305
Feasibility of Vermicomposting of Spent Coffee Grounds and Silverskin from Coffee Industries: A Laboratory Study
In the coffee industry, several by-products are generated during the production and consumption of coffee and represent an important waste from an environmental viewpoint. For improving the knowledge about this issue, a laboratory vermicomposting study of coffee silverskin (CS) and spent coffee grounds (SCG) spiked with mature horse manure (HM) in different proportions and using earthworm Eisenia andrei was carried out. The 60-day study focused on biological parameters such as total biomass gain, growth rate, cocoon production, and mortality. This study also investigated whether the vermicompost obtained could be useful and lacked toxicity through a seed germination test using hybrid wheat seeds. Results showed a disparity depending on the type of residue and the mixture used. Best options were those treatments with a medium–low amount of residue; 25% for SCG and 25% or 50% for CS. In addition, lack of toxicity was confirmed in all treatments. In conclusion, it is possible to carry out a vermicomposting of SCG and CS with some specific features.This research was funded by Government of Navarre and European Regional Development Fund (ERDF) grant number VERMICOMPOSTAJE 4.0—VERMIOT (0011-1365-2019-000110), research project. The APC was funded by Fundación Euskoiker
Experiencias pedagógicas e innovación educativa. Aportaciones desde la praxis docente e investigadora
Este libro recoge las principales aportaciones al IV Congreso Internacional Virtual sobre Innovación Pedagógica y Praxis Educativa-Innovagogía 2018,
organizado por el Colectivo Docente Internacional Innovagogía y AFOE Formación, que tuvo como preámbulo el II Seminario de Innovación Docente: nuevas perspectivas y temas emergentes, celebrado en la Universidad Pablo de Olavide, de Sevilla (España).
En el Congreso están implicados tanto profesionales individuales como organizaciones e instituciones de ámbito internacional, preocupadas por la innovación, la práctica educativa y formativa de calidad.
Está dirigido a profesorado, personal técnico y profesionales de la Educación de cualquier etapa y en todos sus ámbitos: maestros, docentes de secundaria,
bachillerato y formación profesional, profesorado universitario, profesionales del trabajo y la educación social, formación ocupacional y permanente, animación sociocultural, tiempo libre, y animación juvenil, entre otros profesionales.
Los trabajos incluidos recogen reflexiones y experiencias de un total de 540
participantes de 17 nacionalidades diferentes, pertenecientes a más de 100 entidades, 78 de ellas universidades.
Las líneas temáticas en las que se insertan inciden en las buenas prácticas y aportaciones docentes e investigadoras sobre la praxis educativa en los niveles
universitarios y no universitarios, hablan del impacto de las Nuevas Tecnologías en la educación y la formación, así como de la mejora de la calidad de vida
de las personas, sostenibilidad medioambiental, cooperación para el desarrollo, estudios de género e igualdad, educación y formación de personas adultas.
Estamos seguros que la amplitud, diversidad y profundización de las distintas aportaciones ofrecerá nuevas pistas y numerosas ideas para orientar la labor
socio-educativa de los distintos colectivos profesionales involucrados.Facultad Ciencias Sociales. Departamento de Educación y Psicología SocialVersión del edito
Raman and infrared spectroscopy of Sr2B′UO6 (B′ = Ni; Co) double perovskites
Temperature dependent normal modes and lattice thermal expansion of Sr 2B′UO6 (B′ = Ni, Co) double perovskites were investigated by Raman/infrared spectroscopies and synchrotron X-ray diffraction, respectively. Monoclinic crystal structures with space group P21/n were confirmed for both compounds, with no clear structural phase transition between 10 and 400 K. As predicted for this structure, the first-order Raman and infrared spectra show a plethora of active modes. In addition, the Raman spectra reveal an enhancement of the integrated area of an oxygen stretching mode, which is also observed in higher-order Raman modes, and an anomalous softening of ∼1 cm-1 upon cooling below T* ∼ 300 K. In contrast, the infrared spectra show conventional temperature dependence. The band profile phonon anomalies are possibly related to an unspecified electronic property of Sr2B′UO6 (B′ = Ni, Co).Centro de Química Inorgánic
Raman and infrared spectroscopy of Sr2B′UO6 (B′ = Ni; Co) double perovskites
Temperature dependent normal modes and lattice thermal expansion of Sr 2B′UO6 (B′ = Ni, Co) double perovskites were investigated by Raman/infrared spectroscopies and synchrotron X-ray diffraction, respectively. Monoclinic crystal structures with space group P21/n were confirmed for both compounds, with no clear structural phase transition between 10 and 400 K. As predicted for this structure, the first-order Raman and infrared spectra show a plethora of active modes. In addition, the Raman spectra reveal an enhancement of the integrated area of an oxygen stretching mode, which is also observed in higher-order Raman modes, and an anomalous softening of ∼1 cm-1 upon cooling below T* ∼ 300 K. In contrast, the infrared spectra show conventional temperature dependence. The band profile phonon anomalies are possibly related to an unspecified electronic property of Sr2B′UO6 (B′ = Ni, Co).Centro de Química Inorgánic
Annexin A6 modulates TBC1D15/Rab7/StARD3 axis to control endosomal cholesterol export in NPC1 cells
Cholesterol accumulation in late endosomes is a prevailing phenotype of Niemann-Pick type C1 (NPC1) mutant cells. Likewise, annexin A6 (AnxA6) overexpression induces a phenotype reminiscent of NPC1 mutant cells. Here, we demonstrate that this cellular cholesterol imbalance is due to AnxA6 promoting Rab7 inactivation via TBC1D15, a Rab7-GAP. In NPC1 mutant cells, AnxA6 depletion and eventual Rab7 activation was associated with peripheral distribution and increased mobility of late endosomes. This was accompanied by an enhanced lipid accumulation in lipid droplets in an acyl-CoA:cholesterol acyltransferase (ACAT)-dependent manner. Moreover, in AnxA6-deficient NPC1 mutant cells, Rab7-mediated rescue of late endosome-cholesterol export required the StAR-related lipid transfer domain-3 (StARD3) protein. Electron microscopy revealed a significant increase of membrane contact sites (MCS) between late endosomes and ER in NPC1 mutant cells lacking AnxA6, suggesting late endosome-cholesterol transfer to the ER via Rab7 and StARD3-dependent MCS formation. This study identifies AnxA6 as a novel gatekeeper that controls cellular distribution of late endosome-cholesterol via regulation of a Rab7-GAP and MCS formation
Collective Phase-like Mode and the Role of Lattice Distortions at TN~TC in RMn2O5 (R= Pr, Sm, Gd, Tb, Bi)
We report on electronic collective excitations in RMn2O5 (R= Pr, Sm, Gd, Tb)
showing condensation starting at and below TN\simTC\sim40-50 K. Its origin is
understood as partial delocalized eg electron orbitals in the Jahn-Teller
distortion of the pyramids dimmer with strong hybridized Mn3+-O bonds. Our
local probes, Raman, infrared, and X-ray absorption, back the conclusion by
which there is no structural phase transition at TN\simTC. Ferroelectricity is
magnetically assisted by electron localization triggering lattice
polarizability by unscreening. We have also found phonon hardening as the rare
earth is sequentially replaced. This is understood as consequence of lanthanide
contraction. It is suggested that partially f-electron screened Rare Earth
nuclei might be introducing a perturbation to eg electrons prone to delocalize
as the superexchange interaction takes place.Comment: Journal of Physics Cond. Matter April 12, 2012. In pres
Quinine doped hybrid sol-gel coatings for wave guiding and optical applications
Pure and quinine doped silica coatings have been prepared over sodalime glasses. The coatings were consolidated at low temperature (range 60-180 A degrees C) preserving optical activity of quinine molecule. We designed a device to test the guiding properties of the coatings. We confirmed with this device that light injected in pure silica coatings is guided over distances of meters while quinine presence induces isotropic photoluminescence. With the combined use of both type of coatings, it is possible to design light guiding devices and illuminate regions in glass elements without electronic circuits
Desarrollo coordinado de evaluación de competencias en materias de ingeniería
Ponencia presentada en: VIII Jornadas de Innovación Docente de la UBU, Burgos, 5 de abril de 2016, organizadas por el Instituto de Formación e Innovación Educativa-IFIE de la Universidad de Burgo
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