871 research outputs found
The demand for urban transport: An application of discrete choice model for Cadiz
The study of the demand for transport has among others applications, the valuation of travel time saving that is a very important question in cost-benefit analysis, and to adopt transport policy tools. Since McFadden developed a discrete choice model for travel demand, it has usually been the application of this model to study the individual behaviour when he has to choice among transport modes. Citizens of big cities have to face traffic congestion; pollution, wasted time in travels and fuel, noise, stress and accidents are the costs imposed by congestion to society, elements that reduce the quality of life in cities. Public transport is a real alternative to private transport that is socially less expensive, for this reason this paper tries to forecast travel demand for public transport in Cadiz when travelling have to choice between public or private transport, using a discrete choice model. The results of this analysis (travel demand, value of time, elasticities) can be used to design transport policies that could reduce congestion.
The Effect of Aging on Calcium Transients in Rat Cardiomyocytes: Impact of NOX Inhibition
Contents: Iowa State experts\u27 analysis helps Groschopp improve products, satisfy customers; Iowa manufacturers should watch reshoring numbers closely, CIRAS research finds; CIRAS prompts $3.4M economic impact by helping Ryko Solutions build better funnel; CIRAS Innovation Summit seeks to map future for Iowa machinery makers; Iowa workforce: Fill empty jobs by wooing women?: Book by Iowa State professor probes history of discrimination against women studying engineering; Engaging, educating, and embedding—everywhere; CIRAS-led innovation process leads MAson City nonprofit to seek stability in cremation urns; Jackson Manufacturing values work of disabled individuals; Iowa partnership and networking events help companies find allie sin government contracting; Changes coming soon to ISO 9001 quality standardshttps://lib.dr.iastate.edu/ciras_news/1050/thumbnail.jp
A posteriori error analysis of an augmented mixed finite element method for Darcy flow
We develop an a posteriori error analysis of residual type of a stabilized mixed finite element method for Darcy flow. The stabilized formulation is obtained by adding to the standard dual-mixed approach suitable residual type terms arising from Darcy's law and the mass conservation equation. We derive sufficient conditions on the stabilization parameters that guarantee that the augmented variational formulation and the corresponding Galerkin scheme are well-posed. Then, we obtain a simple a posteriori error estimator and prove that it is reliable and locally efficient. Finally, we provide several numerical experiments that illustrate the theoretical results and support the use of the corresponding adaptive algorithm in practice
Inverse spectral problem for analytic plane domains I: Balian-Bloch trace formula
We give a rigorous version of the classical Balian-Bloch trace formula, a
semiclassical expansion around a periodic reflecting ray of the (regularized)
resolvent of the Dirichlet Laplacian on a bounded smooth plane domain. It is
equivalent to the Poisson relation (or wave trace formula) between spectrum and
closed geodesics. We view it primarily as a computational device for explicitly
calculating wave trace invariants. Its effectiveness will be illustrated in
subsquent articles in the series in which concrete inverse spectral results are
proved.Comment: First in a series on the inverse spectral problem for analytic plane
domains. 53 pages, 1 figure. Added some reference
Microscope-Integrated Intraoperative Optical Coherence Tomography in Retinal Surgery
Imaging techniques of the posterior segment of the eye have gradually evolved and tremendously improved during the last decade. A widespread implementation of optical coherence tomography (OCT) for the management and diagnosis of retinal conditions, with a concurrent advance in integrative technology, led to the integration of the OCT into the microscope for its intraoperative use. Regarding posterior segment eye surgery, some of the most common diagnoses in which microscope-integrated OCT (MIOCT) can result of great value are epiretinal membrane, macular hole (MH), proliferative diabetic retinopathy (PDR) and, less frequently, for inflammatory diseases, chorioretinal biopsies, and retinal implants. The impact on the surgical procedure and, possibly, on the postoperative outcome could relate to the definition of whether or not a membrane has been entirely peeled, the presence of residual membranes, and the option to perform a dissection without the need of vital dyes. The possibility of correct topographical location of hemorrhages, suspect lesions, or implants can also facilitate the surgical decision-making during biopsies or prosthesis implantation. Microscope-integrated OCT is a feasible and useful tool that can provide valuable information during surgery impact on decision-making, anatomic results, surgical safety and provide opportunity to individualize surgical treatment for each patient
Programa de Vinculación de Científicos y Tecnológicos – 2015 - 2016
Esta vinculación se realizó con los siguientes objetivos:
- Entrenamiento en Técnicas de Biología Molecular
- Entrenamiento en Bioinformática
- Procesamiento de Muestras biológicas pertenecientes a diversas regiones del país (Paraguay) para determinación de ADN de Leishmania.CONACYT – Consejo Nacional de Ciencia y TecnologíaPROCIENCI
EL TAMAÑO ÓPTIMO DEL GOBIERNO. LA CURVA DE ARMEY: UN ANÁLISIS EMPÍRICO DEL CASO MEXICANO
La función del gobierno dentro del sistema económico ha sido siempre sujeto de debate
dentro la teoría económica. Existen quienes proponen una muy baja intervención
gubernamental en pro del libre mercado, por otra parte, existen aquellos que proponen
una participación gubernamental más activa, con la finalidad de corregir las llamadas
fallas del mercado. En dicho sentido, los autores Barro, Armey, Rahn y Scully proponen
encontrar el punto óptimo de intervención gubernamental -medida a través del gasto
público-, con una relación en forma de u-invertida entre las variables de gasto y
crecimiento económico. Es objetivo del presente trabajo, plantear dicho modelo, conocido
como la curva de BARS, para la economía mexicana, con la finalidad de encontrar, a
través de dichas metodologías, el nivel de gasto público a ejercer que maximice las tasas
de crecimiento económico. Se demuestra, con base en los resultados obtenidos, como la
política fiscal implementada actualmente, no es aquella que maximiza el crecimiento
económico
Correspondances entre caractères de salinité du sol et leur expression sur image satellite SPOT : exemple dans un bassin endoréique de la réserve de Mapimi (Mexique)
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