1,776 research outputs found
Seminario Cromatografía Preparativa. Dr. Guido Krautz, PhD Chemistry University Düsseldorf. Sala Grados. F. Veterinaria. Campus Espinardo
No full textSeminario Cromatografía Preparativa. Dr. Guido Krautz, PhD Chemistry University Düsseldorf. Sala Grados. F. Veterinaria. Campus Espinard
Empowering and assisting natural human mobility: The simbiosis walker
No full textThis paper presents the complete development of the Simbiosis Smart Walker. The device is equipped with a set of sensor subsystems to acquire user-machine interaction forces and the temporal evolution of user's feet during gait. The authors present an adaptive filtering technique used for the identification and separation of different components found on the human-machine interaction forces. This technique allowed isolating the components related with the navigational commands and developing a Fuzzy logic controller to guide the device. The Smart Walker was clinically validated at the Spinal Cord Injury Hospital of Toledo - Spain, presenting great acceptability by spinal chord injury patients and clinical staf
O Contestado e os estilhaços da bala: literatura, história e cinema
No full textTese (doutorado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão. Programa de Pós-Graduação em Literatura.O objeto de estudo centra-se na relação entre literatura, história e cinema. A tese é estruturada em dois capítulos: o primeiro institui os fundamentos teóricos entre literatura, história e cinema, considerando o texto como elemento unificador das três áreas do conhecimento; o segundo estabelece relações entre os textos produzidos antes da Guerra do Contestado, os relatórios de guerra, os textos históricos, o romance Geração do Deserto, de Guido Wilmar Sassi - texto centralizador da discussão - e o filme A guerra dos pelados, de Sylvio Back. Os textos são considerados como estilhaços da Guerra do Contestado
SIMPLIFIED PROCEDURE FOR THE SEISMIC RISK ASSESSMENT OF UNREINFORCED MASONRY BUILDINGS
No full textThe scope of the paper is to present the development and application of a new procedure for the seismic risk assessment at urban or territorial scale of unreinforced masonry buildings (URMB). The procedure, named MeBaSe, is based on four main features: the formulation of the structural capacity and response in terms of mechanics concepts, the representation of seismic demand and structural capacity by means of displacement, the inclusion of the most commonly acknowledged sources of uncertainty and the consideration of in-plane and out-of-plane failure mechanisms. The procedure aims to the evaluation of seismic risk of classes of buildings and is intended as a tool that could in perspective solve most of the drawbacks associated with existing procedures. The uncertainty originating in the material properties and the structural response is treated separately from that coming from the statistics of the population of buildings. The former is directly included in the computation of probability of failure of a class of buildings, whilst the latter is considered in a second stage. The demand, represented by a displacement response spectrum, can be obtained from regional probabilistic seismic hazard studies, and is defined by the median, for each spectral period, and by the corresponding scatter. Concerning the limit states, appropriate median values corresponding to each given drift limit state are used, depending on the type and quality of masonry. For the out-of-plane mechanism, the procedure is restricted so far to simple one-way bending mechanisms. A case study for the validation of the procedure has been carried out in the city of Benevento, Italy, and some preliminary results are presented in the paper, showing the feasibility of the new methodology
Horizontes CEPAL – Capítulo 8: Entrevista a Luis Yáñez [video]
No full textHorizontes CEPAL es un nuevo espacio multimedia de conversación de la Comisión Económica para América Latina y el Caribe en donde se profundiza, con las y los expertos de este organismo, una amplia agenda de temas a los cuales se dedica este centro de pensamiento, una de las comisiones regionales de las Naciones Unidas.
Luis F. Yáñez, Oficial a cargo de la Secretaría de la Comisión, expone las claves y singularidades del Foro de los Países de América Latina y el Caribe sobre el Desarrollo Sostenible, mecanismo regional para el seguimiento de la implementación de la Agenda 2030, que celebrará su primera reunión del 26 al 28 de abril en México.0:00'01" - 0:31'54" : Luis F. Yáñez, Oficial a cargo de la Secretaría de la Comisión, es entrevistado por Guido Camú, de la Oficina de Información Pública de la CEPAL. Se muestran planos generales y medios de ambos, con énfasis en el Sr. Yáñez, quien destaca la importancia del pilar multilateral de la CEPAL, orientado a la cooperación de y con los países para la realización de avances y cumplimiento de metas en diversas áreas clave de la Agenda 2030 para el Desarrollo Sostenible. Se destaca la génesis y labor del Foro de los Países y el rol de la CEPAL
ALMA Reveals a Collision between Protostellar Outflows in BHR 71
No full textFor a binary protostellar outflow system in which its members are located close to each other (the separation being smaller than the addition of the widths of the flows) and with large opening angles, the collision seems unavoidable regardless of the orientation of the outflows. This is in contrast to the current observational evidence of just a few regions with indications of colliding outflows, which could also suggests that the average distance between protostars is larger than the width of the flows. Here, using sensitive observations of the Atacama Large Millimeter/Submillimeter Array, we report resolved images of carbon monoxide (CO) toward the binary flows associated with the BHR 71 protostellar system. These images reveal for the first time solid evidence that their flows are partially colliding, increasing the brightness of the CO, the dispersion of the velocities in the interaction zone, and changing part of the orientation in one of the flows. Additionally, this impact opened the possibility of knowing the three-dimensional geometry of the system, revealing that one of its components (IRS 2) should be closer to us.Fil: Zapata, Luis A.. Universidad Nacional Autónoma de México; MéxicoFil: Fernandez Lopez, Manuel. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; ArgentinaFil: Rodriguez, Luis F.. Universidad Nacional Autónoma de México; MéxicoFil: Garay, Guido. Universidad de Chile; ChileFil: Takahashi, Satoko. Atacama Large Millimeter-submillimeter Array; Chile. Naoj Chile Observatory; ChileFil: Lee, Chin-Fei. Academia Sinica; ChinaFil: Hernández Gómez, Antonio. Universidad Nacional Autónoma de México; Méxic
Uncertainty, instability, and irreversible investment : theory, evidence, and lessons for Africa
No full textA recent (but rapidly growing) literature has focused on how uncertainty and instability affect the adoption of fixed investment projects. That literature shows that if fixed investment projects are costly or impossible to reverse, uncertainty can become a powerful deterrent to investment. The author reviews the literature on irreversible investment to identify the implications for macroeconomic policy and to gauge the practical importance, especially for sub-Saharan Africa, of the link between uncertainty and investment. He presents empirical evidence on the negative association between investment performance and measures of instability, using cross-section time-series data. That evidence suggests that instability and uncertainty are important factors in Africa's poor investment record over the last two decades.Economic Theory&Research,International Terrorism&Counterterrorism,Environmental Economics&Policies,Fiscal&Monetary Policy,Decentralization,Environmental Economics&Policies,ICT Policy and Strategies,Trade and Regional Integration,Economic Theory&Research,International Terrorism&Counterterrorism
Concierto de temporada del Conservatorio de Rionegro
No full text- Coral variado (Guido Farina)
- Preludio y fuga en Do sostenido mayor (J. S. Bach)
- Impromptu en Mi bemol (F. Schubert)
- O Sole Mio (E. Di Capua)
- Matinata (R. Leoncavallo)
- E Lucevan le Stelle (G. Puccini)
- Preludio en Re bemol (F. Chopin)
- ImpromSe desconoce el añoMedellín, Biblioteca Luis Echavarría Villegas, Sala de Patrimonio Documental, Colección Programas de manoRionegro. Conservatorio de Rionegr
A spectrum-driven damage Identification technique: application and validation through the numerical simulation of the Z24 Bridge
No full textThe present paper focuses on a damage identification method based on the use of the second order spectral properties of the nodal response processes. The explicit dependence on the frequency content of the outputs power spectral densities makes them suitable for damage detection and localization. The well-known case study of the Z24 Bridge in Switzerland is chosen to apply and further investigate this technique with the aim of validating its reliability. Numerical simulations of the dynamic response of the structure subjected to different types of excitation are carried out to assess the variability of the spectrum-driven method with respect to both type and position of the excitation sources. The simulated data obtained from random vibrations, impulse, ramp and shaking forces, allowed to build the power spectrum matrix from which the main eigenparameters of reference and damage scenarios are extracted. Afterwards, complex eigenvectors and real eigenvalues are properly weighed and combined and a damage index based on the difference between spectral modes is computed to pinpoint the damage. Finally, a group of vibration-based damage identification methods are selected from the literature to compare the results obtained and to evaluate the performance of the spectral index.The authors would like to express their sincere gratitude to Prof. Dr. Guido De Roeck for sharing his information about the Z24 Bridge. The first author would also like to acknowledge the Italian Ministry of Education, Universities and Research (MIUR) for the Ph.D. scholarship provided
Central bank independence : a critical view
No full textWhile expansive literature on central bank independence contains some criticisms to the independent central bank quasi-paradigm, few critical analyses have been undertaken in the years between Friedman (1962) and Posen (1994). The author extends Posen's analysis to developing countries, discussing more broadly and systematically the reasons why merely instituting an independent central bank may not bring about its professed benefits, especially in developing countries. The author argues that widely reported empirical tests that are purported to support the central bank independence proposition are plagued by potential problems of simultaneity, reverse causality, missing variables, and measurement errors. Yet one can not make positive recommendations about institutional arrangements for central banks if causality relations are not well established. Institutions are shaped by a country's record of and preferences for inflation and may have little influence on them. The author also argues that the purported benefits of an independent central bank may be eroded by conflicts between fiscal and monetary policy and by inherent problems of central bank institutional design (especially mechanisms for board appointments, public accountability, and budgetary control). If these institutional problems are not solved, problems of dynamic inconsistency traditionally associated with monetary policy are not eliminated,but merely transformed. The author suggests that the benefits of central bank independence are less likely obtained in less developed countries with shallow financial markets. Accordingly, central bank independence should be granted at a later stage in a country's financial sector development. If a less developed country seeks to establish a low-inflation path, it should concentrate on instituting financial policy reforms (such as liberalization and privatization) that bolster opposition to inflation rather than easily reversible and practically meaningless changes in legal and institutional structures. This will better ensure the sustainability -- and hence the credibility -- of the government's anti-inflation stance. Fiscal policy is often at the root of macroeconomic disturbances in developing countries. Fiscal policy is more deserving of special protection from politics because of fiscal dominance over monetary policy and its greater vulnerability to private interests. The author suggests that the solution might be to make fiscal policy less susceptible to political pressures by creating an independent fiscal board. Tying the fiscal hands of government may seem a far-fetched idea. But would it not make more sense to force discipline on fiscal policy directly rather than indirectly through monetary policy?Economic Theory&Research,National Governance,Banks&Banking Reform,Economic Stabilization,Macroeconomic Management
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