Publicações - ciências exatas e da terra
|
Antônio Murilo Santos Macêdo;
Arthur A. Brum;
Gerson C. Duarte-Filho;
Francisco A. G. Almeida;
Raydonal Ospina;
Giovani Lopes Vasconcelos
Palavra-chave:
COVID-19;
Fatality curve;
SIRD model;
Richards growth model;
Intervention strategies
resumo ...
(en)
We propose a compartmental SIRD model with time-dependent parameters that can be used to give epidemiological interpretations to the phenomenological parameters of the Richards growth model. We illustrate the use of the map between these two models by fitting the fatality curves of the COVID-19 epidemic data in Italy, Germany, Sweden, Netherlands, Cuba, and Japan, up to July 30, 2020.
|
|
MARTINS, JEFFERSON G.;
OLIVEIRA, LUIZ E. S.;
WEINGAERTNER, DANIEL;
Barison, Andersson;
OLIVEIRA, GERLON A. R.;
LIÃO, LUCIANO M.
Palavra-chave:
Ressoância Magnética Nuclear;
Araucaria angustifolia
Áreas do conhecimento:
Ciências Exatas e da Terra; Química; Ressonancia Magnetica Nuclear
resumo ...
Forests have been disorderly exploited, and many species are considered endangered. Some initiatives have been taken in order to prevent forests from being destroyed. A good alternative would be to plan a spatial distribution of plants, with higher number of females than males. Determining the gender of seedlings would provide important information for a possible strategy. Another common problem that researchers in this field very often face, in order to perform their experiments, is the lack of a representative database. To overcome this difficulty, we introduce a new database in this work, which is composed of nuclear magnetic resonance of adult Araucaria angustifolia plants. In order to gain better insight into this database, we have tested different strategies and classifiers. A first set of experiments took three classifiers trained to discriminate males from females considering the original database. A second round of experiments applied the genetic algorithm technique to select subsets of attributes based on single-objective and two-objective functions. After analyzing the achieved results, we have also proposed a new strategy based on statistical measures for selecting subsets from the attributes. A comprehensive set of experiments has shown that the proposed selecting strategy has achieved better performances, with an accuracy of 80.3% (AUC = 79.4). We believe that researchers will find this database a useful tool in their work on determining the Araucaria angustifolia gender. On the other hand, the proposed selecting strategy would be useful for reducing the complexity of databases and accelerating the process of building classification models.
|
|
Caio dos Anjos Paiva;
CAMBOIM, SILVANA PHILIPPI
Áreas do conhecimento:
Ciências Exatas e da Terra; Ciência da Computação; Metodologia e Técnicas da Computação; Engenharia de Software
resumo ...
(en)
In developing countries, such as Brazil, the official mapping deficit is common. Knowing the quality of information on collaborative mapping platforms would minimize the lack of spatial data. Admitting the so-called Collective Spatial Intelligence as a parameter of collaborative data quality, this article aimed to verify the dependence between the dynamics of collaborations in the OpenStreetMap platform and the crowding of people. It has been assumed that agglomeration derives from the economic activities of a region and the place where people reside. Identifying the dependence, it was possible to stipulate quality variables for the collaborative data, when these are qualified according to Collective Spatial Intelligence.
(pt)
Em regiões com défict ou restrição de acesso a dados espaciais oficiais, conhecer a qualidade dos dados colaborativos permite minimizar a falta de informação espacial. Admitindo como parâmetro de qualidade dos dados colaborativos a chamada Inteligência Espacial Coletiva, o presente artigo verifica a dependência entre a dinâmica das colaborações na plataforma OpenStreetMap e a aglomeração de pessoas. Para tal assumiu duas vertentes como influenciadoras dessa aglomeração: à derivada das atividades econômicas e a aglomeração derivada do local onde as pessoas resindem. Identificado essa dependência, foi possível estipular variáveis de qualidade para os dados colaborativos quando esses são qualificados em função da Inteligência Espacial Coletiva.
|
|
Milena Casafus;
Marília Melo Favalesso;
Micaela Andrea Gritti;
Juan Manuel Caronel;
Ana Tereza Bittencourt Guimaraes;
Maria Elisa Peichoto
Palavra-chave:
Lonomia obliquoa;
Epidemiologia
Áreas do conhecimento:
Ciências Biológicas; Bioquímica dos Microorganismos; Enzimologia;
Ciências da Saúde; Saúde Coletiva; Epidemiologia;
Ciências Exatas e da Terra; Probabilidade e Estatística; Bioestatística
resumo ...
Author summary Caterpillars of the genus Lonomia (Saturniidae: Hemileucinae) are considered the world’s most deadly lepidopterans. Due to the increasing number of cases and the lack of antivenom therapy, envenomation by these animals constitutes an emerging and somewhat neglected public health issue in Argentina and neighboring countries. Our research has determined the eco-epidemiological scenario of such an envenomation in the Argentine province of Misiones–mainly covered by the Atlantic Forest (a suitable biome for L. obliqua)–, and identified some predictors to occurrences/accidents with this insect. This study also provides the first map of the potential risk of lonomism in this province, which has several natural attractions visited by millions of tourists worldwide. We discussed our findings in light of immediate response from health authorities to outline preventive strategies for accidents and conservation of this venomous lepidopteran in its ecological niche.
|
|
Jessica Derkacz Weihermann;
Saulo Pomponet Oliveira;
LI, YAOGUO;
Francisco José Fonseca Ferreira;
SILVA, ADALENE MOREIRA;
FORTIN, RICHARD
Palavra-chave:
aerogamaespectrometria
resumo ...
|
|
FILISBINO FREIRE DA SILVA, EDSON;
MÁRCIA LEÃO DE MORAES NOVO, EVLYN;
DE LUCIA LOBO, FELIPE;
CLEMENTE FARIA BARBOSA, CLÁUDIO;
TRESSMANN CAIRO, CAROLLINE;
Mauricio Almeida Noernberg;
HENRIQUE DA SILVA ROTTA, LUIZ
Palavra-chave:
Classificação Óptica;
Aprendizado de Maquina;
Propriedades bio-ópticas
Áreas do conhecimento:
Ciências Exatas e da Terra; Oceanografia Física;
Ciências Exatas e da Terra; Geociências; Geofísica; Sensoriamento Remoto
resumo ...
|
|
RABÊLO, SUZANA V.;
LOPES, NORBERTO P.;
SILVA, MARIA F. S.;
MORAES, MANOEL O.;
PESSOA, CLÁUDIA DO Ó;
EL AOUAD, NOUREDDINE;
ALMEIDA, JACKSON R. G. S.;
ARAÚJO, EDIGÊNIA C. C.;
COSTA, EMMANOEL V.;
BRAZ-FILHO, RAIMUNDO;
Barison, Andersson;
SANTOS, MARIA DE F. C.;
OLIVEIRA, GIBSON G.;
TOMAZ, JOSÉ C.;
ROLIM, LARISSA A.
Zeitschrift Fur Naturforschung Section B-A Journal Of Chemical Sciences,
v. 76,
n. 6-7,
p. 375-383,
2021
DOI
Palavra-chave:
RMN;
Annona cherimola;
Annona squamosa;
Annonaceae;
Determinação estrutural
Áreas do conhecimento:
Ciências Exatas e da Terra; Química; Ressonancia Magnetica Nuclear;
Engenharias; Engenharia Química; Tecnologia Química; Produtos Naturais;
Ciências Exatas e da Terra; Química; Química Orgânica; Estrutura, Conformação e Estereoquímica
resumo ...
Phytochemical investigation of the atemoya aerial parts was carried out by LC-MS-IT and cytotoxic activities were evaluated as well. These results led to the identification of a new N -oxide alkaloid (dehydroanomuricine- N -oxide) and eight other alkaloids: scoulerine, reticuline, isocorydine, norisocorydine, asimilobine, nornuciferine, anonaine, and liriodenine. The new alkaloid dehydroanomuricine- N -oxide and anomuricine were also isolated. The structures of these compounds were determined by spectroscopic and spectrometric techniques. The cytotoxic capacity of crude methanolic extract and the alkaloidal fraction were evaluated, showing moderate cytotoxicity. The isolation and identification of these alkaloids are an important contribution to the chemotaxonomy of the genus Annona and the Annonaceae family.
|
|
Iolanda Ponzetta Araújo;
Gabriela Ferreira;
Alessandra da Conceição Zanin;
Aline Kundlatsch;
Thayse Geane Iglesias;
Camila Silveira da Silva
Palavra-chave:
pandemia de covid-19;
mulheres nas ciências;
Divulgação científica;
Ensino de Ciências;
Material didático
Áreas do conhecimento:
Ciências Humanas; Educação não-formal e divulgação científica;
Ciências Exatas e da Terra; Química; Ensino de Ciências
resumo ...
|
|
CAMPOS, RAPHAEL GONÇALVES DE;
Caio dos Anjos Paiva;
BRAVO, JOÃO VITOR MESA;
CAMBOIM, SILVANA PHILIPPI
Palavra-chave:
Thematic Maps;
Geospatial Big Data
Áreas do conhecimento:
Ciências Exatas e da Terra; Ciência da Computação; Metodologia e Técnicas da Computação; Engenharia de Software
resumo ...
|
|
Angela Maria dos Santos;
Paulo Simeão Carvalho
Palavra-chave:
movimento relativo;
movimento parabólico;
Metodologia Ativa
resumo ...
|
