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OALib Journal期刊

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Efecto del tipo de labranza sobre el suministro del agua y el crecimiento del frijol tuy en un suelo mollisol de Venezuela
Delgado,Rodolfo; Cabrera de Bisbal,Evelyn; Gamez,Florencio; Navarro,Lesce;
Agronomía Tropical , 2010,
Abstract: the cowpea, vigna unguiculata l. walp, is an important crop in venezuela, and is necessary to evaluate different tillage practices to increase its production, and to improve the soil properties. we evaluated the impact of the minimum tillage (mt) and conventional tillage (ct) in the production of dry matter (dm), foliar area (fa), and crop production of cowpea, variety tuy, sowed at 0.5 m between rows and 0.05 m between plants in a mollisol soil of aragua state, in a completelly randomized block desing, with four repetitions, and the impact in the soil water content until 50 cm of depth during the crop cycle (cc), the soil bulk density, macro- and micro-porosity, total soil porosity and soil infi ltration. the analisis of variance and means test (tukey a=10%) was done using the statistical analysis system (sas) program. there was a not signifi cant difference in the pattern of dm production of leaves, stem, total dm, foliar area, and grain yield between mt and ct. the fa of the ct there was only signifi cat higher than in mt at 67 days after emergency. in the soil, there was signifi cant differences bewteen mt and ct in the soil water of the 0-5 cm soil layer, in the total soil porosity of the 30-40 and 40-50 cm soil layers, in the soil bulk density of the 0-5 and 5-10 cm soil layers, and in the soil water content at soil capacity in the 0-5 and 10-20 cm soil layers. there was a signifi cant relationship between the water used or missing during the crop cycle and the total dm produced in mt and ct
From baconian to popperian neuroscience
Gamez David
Neural Systems & Circuits , 2012, DOI: 10.1186/2042-1001-2-2
Abstract: The development of neuroscience over the past 50 years has some similarities with the development of physics in the 17th century. Towards the beginning of that century, Bacon promoted the systematic gathering of experimental data and the induction of scientific truth; towards the end, Newton expressed his principles of gravitation and motion in a concise set of mathematical equations that made precise falsifiable predictions. This paper expresses the opinion that as neuroscience comes of age, it needs to move away from amassing large quantities of data about the brain, and adopt a popperian model in which theories are developed that can make strong falsifiable predictions and guide future experimental work.
The place of the Iranian Revolution in the history of truth: Foucault on neoliberalism, spirituality and enlightenment
Patrick Gamez
- , 2019, DOI: 10.1177/0191453718794751
Abstract: In this article I want to argue that Foucault’s engagement with the Iranian Revolution was neither romantic fascist atavism nor does it presage any sort of transformation of his thought. Indeed, Foucault’s investigations of neoliberalism and subsequent work on spirituality, truth-telling and ethics are fully continuous with his critical genealogy of power. This is an important point, as we shall see, insofar as Foucault’s journalism on the Iranian Revolution occurs in the midst of his Collège de France lectures on biopolitics and governmentality. Foucault’s enthusiasm for the Revolution might indicate, albeit very indirectly, directions for thought that might resist neoliberalism. I will argue that Foucault was engaged in a very specific telling of the ‘history of truth’, emphasizing a partisan and agonistic form of truth-telling and transformation through struggle and ordeal, as opposed to the pacifying, neutralizing and normalizing forms of modern Western power. The ‘political spirituality’ Foucault witnessed on the streets of Tehran was a reactivation of this agonism, and– I will claim – a literal embodiment of what Foucault calls the ‘ethos of critique’
Power Transformer Life
Gamez, Carlos
- , 2014,
Abstract: Sa？etak The concept of life for an electrical asset, such as a power transformer, is sometimes not properly understood. In this article, the frst from the series of three articles, we review what we mean when we refer to the “life” of a transformer and what constrains determine the design and operational parameters of these assets
Power transformer Life Part 2: Ageing Mechanisms
Gamez, Carlos
- , 2014,
Abstract: Sa？etak This article continues to explore the concepts described in the previous article where a link between insulation life and overall transformer life was established. Through the examination of the molecular structure of cellulose, the main constituent of most of the insulation system, it explains the various factors that might a？ect the integrity of this component, how they contribute to the normal ageing processes and how these processes are sometimes accelerated. After we have established a link between the life of a transformer and the life of its insulation system, in this article we take a closer look at what makes up the insulating materials, what are the factors that a？ect its life and why. In my previous article, I drew up what I hope was a clear connection between what we call life in the context of a power transformer and the condition of its insulation system. We established that the life expectancy of a particular unit is intimately linked to the condition of the cellulosic material that makes up the bulk of its insulation system. The inquisitive reader would reasonably ask: “If the life of a transformer depends on the life of the insulation material, what then defnes the condition of these materials?” In this article, the second of our series of three, I will try to answer that question and provide you with a holistic picture of all the factors that have an e？ect on the life of insulation and why
Power transformer life Part 3: Life management and extension
Gamez, Carlos
- , 2014,
Abstract: Sa？etak This article closes the Transformer Life series by looking at various ways that a transformer owner can extend the life of their investment. From the initial stages of specifying and purchasing a transformer to the management of the transformer throughout its useful life, we explore which options have the best cost to beneft ratio and why
Validación de la determinación de cloruros y humedad, para la evaluación de combustibles alternos para hornos de cementeras
Ana Lorena Alvarado Gamez
Tecnología en Marcha , 2010,
Abstract: Se validaron dos métodos para la evaluación fisicoquímica de materiales de desecho de diferentes empresas interesadas en tratar sus residuos como combustibles alternativos para un horno de cemento que calcina estos materiales a una temperatura máxima de 2000 °C. Para esto se optimizaron las figuras de desempe o de la determinación de cloruros con un electrodo de ion selectivo y la humedad por el método coulombimétrico de Karl Fisher.
Work Projects in the Subject of Art Education
Ainhoa GAMEZ PINTADO
Revista Romaneasca pentru Educatie Multidimensionala , 2013,
Abstract: Education in general and art in particular, must also getting to train students in various fields of knowledge, help in its formation as a person, increase motivation, develop creativity and so on. Traditional media have not obtained the desired results and that is why quite some time, new methodologies are beginning to emerge with the intention of improving the educational prospects. One of the tools that have emerged in order to respond to this situation has been the work projects. This approach aims to offer a project design that enhances creativity as well as the motivation of the students of the subject of artistic education in secondary education, while the acquired competencies listed in the official curriculum for this stage, and students are new to the knowledge of their environment.
Developing Scintillation Light Readout Simulation for the SBND experiment
D. Garcia-Gamez
Physics , 2015,
Abstract: Detection of scintillation light can play several important roles in LArTPCs. Increased collection efficiency could result in the improvement of time, energy, and position resolution. The SBND collaboration is developing detailed MC simulations to study the performance of different types of light systems in the LArSoft framework. Due to the vast number of photons typically produced in neutrino physics events, a full optical simulation becomes extremely hard to run on reasonable time scales. I will describe how the SBND simulation tackles these problems and its current status for two of the light detection systems considered by SBND: (i) a traditional TPB-coated PMT based system and (ii) a system based on TPB-coated reflector foils to increase collection efficiency without increasing the number of photodetectors.
$nu=5/2$ Fractional Quantum Hall State in Low-Mobility Electron Systems: Different Roles of Disorder
Gerardo Gamez,Koji Muraki
Physics , 2011, DOI: 10.1103/PhysRevB.88.075308
Abstract: We report the observation of a fully developed fractional quantum Hall state at $\nu=5/2$ in GaAs/Al$_{x}$Ga$_{1-x}$As quantum wells with mobility well below $10^{7}$\thinspace cm$^{2}$/Vs. This is achieved either by strong illumination or reducing the barrier Al composition without illumination. We explain both results in terms of screening of the ionized remote impurity (RI) potential by nearby neutral shallow donors. Despite the dramatic improvement in the transport features, the energy gap $\Delta_{5/2}$ is limited to a rather small value ($\sim100$ mK), which indicates that once the RI potential is well screened and the $5/2$ state emerges, the size of $\Delta_{5/2}$ is limited by the mobility, i.e., by background impurities.
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