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Search Results: 1 - 10 of 465714 matches for " M. José;Victor "
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Geotourism in the Salesópolis-Caraguatatuba Trail, São Paulo, Brazil: A Possibility to Utilize Geological Elements for Sustainable Development  [PDF]
Victor F. Velázquez, José M. Azevedo Sobrinho, Mikhaela A. J. S. Pletsch, Antonio C. M. Guedes, Gibby Zobel
Journal of Environmental Protection (JEP) , 2013, DOI: 10.4236/jep.2013.410120
Abstract:

The Salesópolis-Caraguatatuba trail lies slightly more than 130 km to ESE from the Sao Paulo city, and it is fully inserted within the Atlantic Forest. The region is particularly interesting because it brings together a complex lithological association and an exuberant topographical expression. A set of geological and geomorphological elements with high potentiality for the sustainable tourism development is documented in this paper. The geosites provide a wide variety of attraction, including valleys, streams, waterfalls and the unusual shapes of rocks. In each one of those outcrops, the visitors will have an exceptional opportunity for a better understanding about the processes that control the landscape evolution. In accordance with the new conception of geotourism, and taking as a basis the concepts of the geoscience for a rereading and interpretation of the several aspects of space and landscape, the sites catalogued should enable a new insight to increase environmental awareness of the local community, and, mainly, to encourage an innovative form of economic activity that has as a fundamental principle the nature preservation.

Algunos Metodos Activos para el uso del Video en la Ense anza de la Física
Victor M. Mujica,Marcelo José A. Aceituno Mederos
Investiga??es em Ensino de Ciências , 1996,
Abstract: Video, as any other means, has its own requirements for its use. When used incorrectly it may become a dissociating agent of the lecture and leads to the unfulfillment of the objectives of the lesson. In this paper we give some results about a research on the comparison of two distinct methods of using the video in lectures, specifically on physics, showing which one of them is more efficient to fulfill the objectives of the lecture, as well as the contribution it gives to the students process of mastering knowledge and abilities. We also provide a statistical analysis of the results.
Stereotactic fibrinolysis of spontaneous intracerebral hematoma using infusion of recombinant tissue plasminogen activator
Nasser José Augusto,Falavigna Asdrubal,Bezerra Márcio,Martinez Victor
Arquivos de Neuro-Psiquiatria , 2002,
Abstract: PURPOSE: The authors present a prospective study on 10 patients with stereotactic infusion of tissue plasminogen activator (rtPA) intraparenchimal hemorrhage. METHODS: Between 1999 and 2000, 10 patients with deep seated hematomas in the basal ganglia were selected for stereotactic infusion of rtPA and spontaneous clot drainage. RESULTS: All cases had about 80% reduction of the hematoma volume in the CT scan at the third day. The intracranial pressure was normalized by the third day too. There were no local or systemic complications with the use of this trombolitic. The results were shown by the Glasgow Outcome Scale with six patients in V, three in IV and one in III after 3 months. CONCLUSION: Early treatment and drainage with minimally invasive neurosurgery , can make these patients with deep-seated hematomas recover the consciousness and they can be rehabilitated earlier avoiding secondary complications.
Data-driven modeling of systemic delay propagation under severe meteorological conditions
Pablo Fleurquin,José J. Ramasco,Victor M. Eguiluz
Physics , 2013,
Abstract: The upsetting consequences of weather conditions are well known to any person involved in air transportation. Still the quantification of how these disturbances affect delay propagation and the effectiveness of managers and pilots interventions to prevent possible large-scale system failures needs further attention. In this work, we employ an agent-based data-driven model developed using real flight performance registers for the entire US airport network and focus on the events occurring on October 27 2010 in the United States. A major storm complex that was later called the 2010 Superstorm took place that day. Our model correctly reproduces the evolution of the delay-spreading dynamics. By considering different intervention measures, we can even improve the model predictions getting closer to the real delay data. Our model can thus be of help to managers as a tool to assess different intervention measures in order to diminish the impact of disruptive conditions in the air transport system.
Characterization of delay propagation in the US air transportation network
Pablo Fleurquin,José J. Ramasco,Victor M. Eguíluz
Computer Science , 2013,
Abstract: Complex networks provide a suitable framework to characterize air traffic. Previous works described the world air transport network as a graph where direct flights are edges and commercial airports are vertices. In this work, we focus instead on the properties of flight delays in the US air transportation network. We analyze flight performance data in 2010 and study the topological structure of the network as well as the aircraft rotation. The properties of flight delays, including the distribution of total delays, the dependence on the day of the week and the hour-by-hour evolution within each day, are characterized paying special attention to flights accumulating delays longer than 12 hours. We find that the distributions are robust to changes in takeoff or landing operations, different moments of the year or even different airports in the contiguous states. However, airports in remote areas (Hawaii, Alaska, Puerto Rico) can show peculiar distributions biased toward long delays. Additionally, we show that long delayed flights have an important dependence on the destination airport.
Evidence of Shock Metamorphism Effects in Allochthonous Breccia Deposits from the Colônia Crater, São Paulo, Brazil  [PDF]
Victor F. Velázquez, Claudio Riccomini, José M. Azevedo Sobrinho, Mikhaela A. J. S. Pletsch, Alethéa E. Martins Sallun, William Sallun Filho, Jorge Hachiro
International Journal of Geosciences (IJG) , 2013, DOI: 10.4236/ijg.2013.41A025
Abstract:

The 3.6 km-diameter Colonia impact crater, centred at 23\"\"52'03\"S and 46\"\"42'27\"W, lies 40 km to the south-west of the S?o Paulo city. The structure was formed on the crystalline basement rocks and displays a bowl-shaped with steeper slope near the top that decreases gently toward the centre of the crater. Over recent years were drilled two boreholes inside the crater, which reached a maximum depth of 142 m and 197 m. Geological profile suggests four different lithological associations: 1) unshocked crystalline basement rocks (197 - 140 m); 2) fractured/brecciated basement rocks (140 - 110 m); 3) polymictic allochthonous breccia deposits (110 - 40 m); and 4) post-impact deposits (40 - 0 m). Petrographic characterisation of the polymictic allochthonous breccia reveals a series of distinctive shock-metamorphic features, including, among others, planar deformation features in quartz, feldspar and mica, ballen silica, granular texture in zircon and melt-bearing impact rocks. The occurrence of melt particles and very high-pressure phase transformation in suevite breccia suggest a shock pressure regime higher than 60 GPa.


Soil Thermal Diffusivity of a Gleyic Solonetz Soil Estimated by Different Methods in the Brazilian Pantanal  [PDF]
Victor H. M. Danelichen, Marcelo S. Biudes, Maísa C. Souza, Nadja G. Machado, Leone F. A. Curado, José S. Nogueira
Open Journal of Soil Science (OJSS) , 2013, DOI: 10.4236/ojss.2013.31003
Abstract:

The soil temperature is an important microclimatic factor due to the interactions between soil and plant, and the energy exchange with the atmosphere. The soil energy exchange is affected by the incident solar radiation, type of coverage and mainly by the soil thermal properties. Among the soil thermal properties, the soil thermal diffusivity is highlighted because it affects the soil temperature profile and soil heat flux transport and distribution. Thus, the aim of this study was to evaluate different estimates of soil thermal diffusivity of a Gleyic Solonetz soil in the Brazilian Pantanal. The soil thermal diffusivity was determined by the amplitude, logarithmic, arctangent and the phase methods between 0.01 and 0.03 m, 0.01 and 0.07 m and 0.01 and 0.15 m depth. The soil thermal diffusivity estimated by the four methods showed significant differences and varied over the study period as a function of volumetric soil water content. The soil thermal diffusivity estimated by logarithmic methodshowed better performance at different depths, followed by the method of phase.

Fruit Market in the City of Lavras, Minas Gerais, Brazil from 2004 to 2017  [PDF]
José Clélio de Andrade, Lair Victor Pereira, ?ngelo Albérico Alvarenga, Ester Alice Ferreira, Paulo Márcio Norberto, Marcelo Ribeiro Malta
Agricultural Sciences (AS) , 2017, DOI: 10.4236/as.2017.811092
Abstract: Fruit growing has achieved advances through the use of new technologies generated by research. In Brazil, it is one of the most prominent sectors in agribusiness, achieving significant results and generating business opportunities. In this way, the fruit market has grown considerably in the last decades, both in quantity and in quality. Allied to this, the changes in consumer behavior regarding food consumption have been responsible for the increase of the fruit market. The objective of this work was to know the evolution of the fruit trade in the city of Lavras, state of Minas Gerais, Brazil, in relation to the quantity sold, monetary value, losses in the gondolas of retail establishments and per capita consumption of the population of this city.
Cultivation of “Roxo de Valinhos” Fig Tree in Different Plant Densities for Production of Green Figs for Industry in the Region of Campo Das Vertentes-MG  [PDF]
Paulo Márcio Norberto, ?ngelo Albérico Alvarenga, José Clelio de Andrade, Filipe Almendagna Rodrigues, Lair Victor Pereira, Emerson Dias Gon?alves
Agricultural Sciences (AS) , 2018, DOI: 10.4236/as.2018.99076
Abstract: The objective of this work was to study the effect of different planting densities on the development and production of “Roxo de Valinhos” green figs for industry, in the Campo das Vertentes-MG region. The experiment was installed at the Risoleta Neves Experimental Field—CERN/EPAMIG. The plants used were three years old and were arranged in three randomized blocks, subject to three different planting densities, with spacings ranging from 1 m (4000 plants·ha-1), 1.5 m (2666 plants·ha-1), and 2 m (2000 plants·ha-1) between plants in the planting line and 2.5 m between row for all planting densities. The average length of the branches (m), average number of fruits per branch, average number of fruits per plant, average weight of fruits, average yield per plant and the average yield per hectare (kg) were evaluated. It was verified that, there were no significant differences in the length of branch and in the average weight of fruit, in the three densities of fig tree planting. (4000 plants·ha-1), the average number of fruits per branch (7.5), per plant (55.87) and yield per plant (878.93 kg) were lower, however. The average yield per hectare (3515.73 kg) was higher than in other growing densities. It is concluded that, the higher density of plants (4000 plants·ha-1), provides the highest productivity per area, without damages to the quality of the fruits.
Social Features of Online Networks: The Strength of Intermediary Ties in Online Social Media
Przemyslaw A. Grabowicz, José J. Ramasco, Esteban Moro, Josep M. Pujol, Victor M. Eguiluz
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0029358
Abstract: An increasing fraction of today's social interactions occur using online social media as communication channels. Recent worldwide events, such as social movements in Spain or revolts in the Middle East, highlight their capacity to boost people's coordination. Online networks display in general a rich internal structure where users can choose among different types and intensity of interactions. Despite this, there are still open questions regarding the social value of online interactions. For example, the existence of users with millions of online friends sheds doubts on the relevance of these relations. In this work, we focus on Twitter, one of the most popular online social networks, and find that the network formed by the basic type of connections is organized in groups. The activity of the users conforms to the landscape determined by such groups. Furthermore, Twitter's distinction between different types of interactions allows us to establish a parallelism between online and offline social networks: personal interactions are more likely to occur on internal links to the groups (the weakness of strong ties); events transmitting new information go preferentially through links connecting different groups (the strength of weak ties) or even more through links connecting to users belonging to several groups that act as brokers (the strength of intermediary ties).
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