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Model of non-equilibrium near-cathode plasma layers for simulation of ignition ...

Santos, D. F. N.; Almeida, N. A.; Benilova, L. G.; Benilov, M; Santos, Diego; Benilov, Mikhail

<jats:title>Abstract</jats:title> <jats:p>The introduction of secondary ion-electron emission into an approximate model of non-equilibrium plasma layers on hot (thermionic) cathodes of high-pressure arc discharges allows extending the model to low cathode surface temperatures. Analysis of evaluation results shows that the extended model describes glow-like discharges on cold cathodes and thermionic arc discharg...


Identificação das comunidades arbóreas das Caatingas do Cristalino nos municípi...

Pereira, Marízia; Souza, Elnatan; Ribeiro, Sílvia; Araújo, Francisco; Santos, Diego; Guiomar, Nuno

Na região semiárida do Nordeste do Brasil, localiza-se o bioma Caatinga, a “floresta branca”, devido ao aspeto da vegetação na estação seca, a caducifólia da maioria das árvores e arbustos. A Caatinga do Cristalino, que ocupa 70% nas superfícies sertanejas, em solos delgados e fertilidade moderada a elevada, está dominada pela vegetação do semiárido. Neste trabalho, identificou-se a flora e algumas comunida...


New record of Allamanda blanchetti Kunth (Apocynaceae) for the Brazilian Atlant...

Santos, Diego; Costa, Swami Leitão; Costa, Francisco Carlos Pinheiro

This study report the first record of Allamanda blanchetii Kunth in the Atlantic Forest, Brazil. This species was collected from an upland forest in Semi-deciduous Seasonal Forest. This occurrence adds new information about the distribution of this species and expands its range to Brazil, which is important for its conservation. We provide taxonomic information, distribution maps, conservation status assessment...

Date: 2021   |   Origin: Oasisbr

New records of Convolvulaceae species for the Ceará state and its potential geo...

Santos, Diego; Campos, Ketley Gomes; Figueiredo, Marlene Feliciano; Júnior, Edson Gomes Moura; Buril, Maria Teresa

This study reports six new records of Convolvulaceae for Ceará state, notheastern Brazil: Ipomoea aristolochifolia G.Don, Ipomoea calyptrata Dammer, I. cynanchifolia Meisn, I. longibracteolata Sim.-Bianch. &amp; J. R. I. Wood, I. meyeri G. Don and Jacquemontia mucronifera (Choisy) Hallier f. Of these, I. longibracteolata and I. meyeri are new records for the Atlantic Forest and Caatinga, respectively. For each ...

Date: 2020   |   Origin: Oasisbr

Educação para o ecodesenvolvimento no ensino básico sob a perspectiva da Ecosso...

Santos, Diego; Souza, Cristiane Mansur de Moraes

O século XXI trouxe consigo inúmeras revoluções científicas. Entretanto, ainda se depende essencialmente dos recursos naturais para o bem-estar humano. A educação exerce importante papel no desenvolvimento da humanidade e no modo como as populações alteram a dinâmica da natureza. Neste sentido, o ecodesenvolvimento está envolto na ecossocioeconomia, por ser um enfoque que enfatiza que os sistemas sociais estão ...

Date: 2018   |   Origin: Oasisbr

As comunidades de jurema-preta (Mimosa tenuiflora (Willd.) Poir.) e pau-branco ...

Pereira, Marízia; Braga, Petrônio; Santos, Diego; Ribeiro, Silvia; Guiomar, Nuno

A Caatinga é uma formação vegetal xerófila e sazonalmente seca, que ocorre na região semiárida do Nordeste brasileiro. Este domínio fitogeográfico abrange desde as áreas semi-desérticas de vegetação escassa até a cobertura vegetal densa com arbustos e árvores. O sobrepastoreio e a degradação da Caatinga na sequência de queimadas sucessivas poderá originar uma sucessão secundária que evolui para um clímax de áre...


mtDNA structure : the women who formed the Brazilian Northeast

Schaan, Ana Paula; Costa, Lorenna; Santos, Diego; Modesto, Antonio; Amador, Marcos; Lopes, Camile; Rabenhorst, Silvia Helena Barem; Montenegro, Raquel

Background: The distribution of mitochondrial DNA (mtDNA) lineages in Brazil is heterogeneous due to different regional colonization dynamics. Northeastern Brazil, although being an important region in terms of human imigration and ethnic admixture, has little information regarding its population mtDNA composition. Here, we determine which mitochondrial lineages contributed to the formation of the Northeastern ...

Date: 2017   |   Origin: Oasisbr

Hospitality in the scientific production on volunteer tourism

Santos, Diego; Rejowski, Mirian

Exploratory-descriptive research project, in the form of a document analysis, aimed to&nbsp;understand how hospitality permeates the volunteer tourism scientific production, from the analysis of&nbsp;journal articles published in English language on the international database Scopus from 2000 to 2015.&nbsp;The search terms “volunteer tourism” and “voluntourism” resulted in the initial sample of 149 articles,&nb...


The flora and vegetation of rocky outcrops in three municipalities in the north...

Pereira, Marízia; Braga, Petrônio; Guiomar, Nuno; Santos, Diego; Ribeiro, Silvia

This study aims to identify the flora and vegetation of rocky outcrops of low altitude and confined in the municipalities of Sobral, Groaíras and Santa Quitéria (Ceará state, Brazil), to propose a phytosociological classification for the xerophilous communities. We selected five stations in areas with high proportion of bare rock (> 80%), and the field work were conducted in March 2014 and 2015 respectively (3º...


The flora and communities Carnaubal Palm Forest in the northern region of Ceará...

Pereira, Marízia; Braga, Petrônio; Santos, Diego; Ribeiro, Silvia; Guiomar, Nuno

The “dicótilo-palmácea” mixed forest is found in the fluvial plains (floodplains) of watercourses on the Ceará semiarid region (Brazil), distinguishing from the surrounding vegetation (caatinga) by the prevalence of larger tree species. In the river’s margins, presenting high variability in the extension of the riverbanks, arise floodplains in pedologic complexes mainly composed by neossols and argissols, resul...


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