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Institution

Sao Paulo State University

EducationSão Paulo, Brazil
About: Sao Paulo State University is a education organization based out in São Paulo, Brazil. It is known for research contribution in the topics: Population & Large Hadron Collider. The organization has 55715 authors who have published 100436 publications receiving 1375332 citations.


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Journal ArticleDOI
TL;DR: In this article, a trabalho foi avaliar a variabilidade espacial de atributos of Latossolos, a cultivo de cana-de-acucar, in the regiao de Jaboticabal (SP).
Abstract: O objetivo do presente trabalho foi avaliar a variabilidade espacial de atributos de Latossolos sob cultivo de cana-de-acucar na regiao de Jaboticabal (SP). Foram feitas amostragens do solo a intervalos regulares de 50 m, em uma area de 90 ha, nas profundidades de 0,00-0,20 e 0,60-0,80 m para determinacao de pH, CTC, V % e teores de materia orgânica, P, K+, Ca2+, Mg2+, H + Al e argila. Os dados foram submetidos as analises: estatistica descritiva, geoestatistica e interpolacao por krigagem. Os alcances de dependencia espacial para os atributos quimicos do solo e teores de argila na camada de 0,60-0,80 m de profundidade foram menores, quando comparados aqueles referentes a camada de 0,00-0,20 m. Estes resultados demonstraram maior descontinuidade na distribuicao espacial dos atributos do solo na camada de 0,60-0,80 m de profundidade dos Latossolos, indicando que essa classe de solos nao apresentou homogeneidade de seus atributos como conceituadamente a ela foi atribuida. O manejo no solo alterou a dependencia espacial dos atributos do solo na camada superficial de forma a diminuir a variabilidade espacial dos atributos quimicos do solo em relacao a camada mais profunda. A investigacao da variabilidade espacial de atributos quimicos e do teor de argila da camada superficial e subsuperficial dos solos proporcionou condicoes para a definicao de zonas homogeneas de manejo, o que permite a adocao do sistema de agricultura de precisao.

168 citations

Proceedings ArticleDOI
20 Jan 1998
TL;DR: The goal of this work is to assess the efficacy of texture measures for estimating levels of crowd densities in images, crucial for the problem of crowd monitoring and control.
Abstract: The goal of this work is to assess the efficacy of texture measures for estimating levels of crowd densities in images. This estimation is crucial for the problem of crowd monitoring and control. The assessment is carried out on a set of nearly 300 real images captured from Liverpool Street Train Station, London, UK, using texture measures extracted from the images through the following four different methods: gray level dependence matrices, straight line segments, Fourier analysis, and fractal dimensions. The estimations of crowd densities are given in terms of the classification of the input images in five classes of densities (very low, low, moderate, high and very high). Three types of classifiers are used: neural (implemented according to the Kohonen model), Bayesian, and an approach based on fitting functions. The results obtained by these three classifiers, using the four texture measures, allowed the conclusion that, for the problem of crowd density estimation, texture analysis is very effective.

168 citations

Journal ArticleDOI
TL;DR: It is concluded that LC noradrenergic neurons modulate hypercapnic ventilatory response but play no role in cardiovascular and thermal regulation under resting conditions.
Abstract: The Locus coeruleus (LC) has been suggested as a CO(2) chemoreceptor site in mammals. In the present study, we assessed the role of LC noradrenergic neurons in the cardiorespiratory and thermal responses to hypercapnia. To selectively destroy LC noradrenergic neurons, we administered 6-hydroxydopamine (6-OHDA) bilaterally into the LC of male Wistar rats. Control animals had vehicle (ascorbic acid) injected (sham group) into the LC. Pulmonary ventilation (plethysmograph), mean arterial pressure (MAP), heart rate (HR), and body core temperature (T (c), data loggers) were measured followed by 60 min of hypercapnic exposure (7% CO(2) in air). To verify the correct placement and effectiveness of the chemical lesions, tyrosine hydroxylase immunoreactivity was performed. Hypercapnia caused an increase in pulmonary ventilation in all groups, which resulted from increases in respiratory frequency and tidal volume (V (T)) in sham-operated and 6-OHDA-lesioned groups. The hypercapnic ventilatory response was significantly decreased in 6-OHDA-lesioned rats compared with sham group. This difference was due to a decreased V (T) in 6-OHDA rats. LC chemical lesion or hypercapnia did not affect MAP, HR, and T (c). Thus, we conclude that LC noradrenergic neurons modulate hypercapnic ventilatory response but play no role in cardiovascular and thermal regulation under resting conditions.

168 citations

Journal ArticleDOI
TL;DR: This study proves that encapsulation of the herbicides improved their mode of action and reduced their toxicity, indicating their suitability for use in future practical applications.
Abstract: The use of lower concentrations and fewer applications of herbicides is one of the prime objectives of the sustainable agriculture as it decreases the toxicity to non-targeted organisms and the risk of wider environmental contamination. In the present work, nanoparticles were developed for encapsulation of the herbicides imazapic and imazapyr. Alginate/chitosan and chitosan/tripolyphosphate nanoparticles were manufactured, and their physicochemical stability was evaluated. Determinations were made of the encapsulation efficiency and release kinetics, and the toxicity of the nanoparticles was evaluated using cytotoxicity and genotoxicity assays. The effects of herbicides and herbicide-loaded nanoparticles on soil microorganisms were studied in detail using real-time polymerase chain reactions. The nanoparticles showed an average size of 400 nm and remained stable during 30 days of storage at ambient temperature. Satisfactory encapsulation efficiencies of between 50 and 70% were achieved for both types of particles. Cytotoxicity assays showed that the encapsulated herbicides were less toxic, compared to the free compounds, and genotoxicity was decreased. Analyses of soil microbiota revealed changes in the bacteria of the soils exposed to the different treatments. Our study proves that encapsulation of the herbicides improved their mode of action and reduced their toxicity, indicating their suitability for use in future practical applications.

168 citations

Journal ArticleDOI
TL;DR: In this article, a measurement of the lepton charge asymmetry in WX production at 7 TeV was presented based on data recorded by the CMS detector at the LHC and corresponding to an integrated luminosity of 36 inverse picobarns.
Abstract: A measurement of the lepton charge asymmetry in inclusive pp to WX production at sqrt(s)= 7 TeV is presented based on data recorded by the CMS detector at the LHC and corresponding to an integrated luminosity of 36 inverse picobarns. This high precision measurement of the lepton charge asymmetry, performed in both the W to e nu and W to mu nu channels, provides new insights into parton distribution functions.

167 citations


Authors

Showing all 56201 results

NameH-indexPapersCitations
Russel J. Reiter1691646121010
Tobin J. Marks1591621111604
Joseph T. Hupp14173182647
Luca Lista1402044110645
Sergio F Novaes1381559101941
Wagner Carvalho135139594184
Alberto Santoro1351576100629
Andre Sznajder134146498242
Luiz Mundim133141389792
Eduardo De Moraes Gregores133145492464
Helio Nogima132127484368
Pedro G Mercadante129133186378
D. De Jesus Damiao128116282707
Sandra S. Padula128113177174
Sudha Ahuja127101675739
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
2023127
2022765
20216,826
20206,949
20196,316
20186,314