767 research outputs found
Characterization of Tulamoeba bucina n. sp., an extremely halotolerant amoeboflagellate heterolobosean belonging to the Tulamoeba-Pleurostomum Clade (Tulamoebidae n. fam.)
No full textMost protozoans that have been cultivated recently from high salinity waters appear to be obligate halophiles. Phylogenetic analyses indicate that these species mostly represent independent lineages. Here, we report the cultivation, morphological characterization, and phylogenetic analysis of two strains (XLG1 and HLM-8) of a new extremely halotolerant heterolobosean amoeboflagellate. This species is closely related to the obligate halophiles Tulamoeba peronaphora and Pleurostomum flabellatum, and more specifically to the former. Like Tulamoeba, the new species has a monopodial limax amoeba stage, however, its cyst stage lacks an intrusive pore plug. The flagellate stage bears a combination of a planar spiral feeding apparatus and unequal heterodynamic flagella that discriminates it from described Pleurostomum species. Strain XLG1 grows at salinities from 35‰ to 225‰. This degree of halotolerance is uncommon in protozoa, as most species showing growth in seawater are unable to grow at 200‰ salinity. The unrelatedness of most halophilic protozoa suggested that independent colonization of the hypersaline environment is more common than speciation within it. However, this study supports the idea that the Tulamoeba–Pleurostomum clade underwent an adaptive radiation within the hypersaline environment. A new species Tulamoeba bucina n. sp. is described, with Tulamoebidae n. fam. proposed for the Tulamoeba–Pleurostomum clade
Large Time Step and DC Stable TD-EFIE Discretized with Implicit Runge-Kutta Methods
No full textThe time domain-electric field integral equation (TD-EFIE) and its differentiated version are widely used to simulate the transient scattering of a time dependent electromagnetic field by a perfect electric conductor (PEC). The time discretization of the TD-EFIE can be achieved by a space-time Galerkin approach or, as it is considered in this contribution, by a convolution quadrature using implicit Runge-Kutta methods. The solution is then computed using the marching-on-in-time (MOT) algorithm. The differentiated TD-EFIE has two problems: 1) the system matrix suffers from ill-conditioning when the time step increases (low frequency breakdown) and 2) it suffers from the DC instability, i.e., the formulation allows for the existence of spurious solenoidal currents that grow slowly in the solution. In this article, we show that 1) and 2) can be alleviated by leveraging quasi-Helmholtz projectors to separate the Helmholtz components of the induced current and rescale them independently. The efficacy of the approach is demonstrated by numerical examples including benchmarks and real-life applications.Numerical Analysi
Alexandre Kojève’s Philosophy of Law
No full textEste artículo es una presentación de la filosofía del derecho de Alexandre Kojève contenida en su Esquisse d’une phénoménologie du droit (1981). La poca atención que dicha obra ha recibido es un vacío que debiera llenarse con una reflexión crítica de sus puntos fuertes. Entre ellos destaca una concepción de la justicia internacional que proyecta una luz muy singular sobre los actuales debates en torno a la globalización y el cosmopolitismo. A ojos de este autor, la ciudadanía es el elemento clave para aquilatar la expansión global de lo jurídico. En suma, Kojève aparece como un valioso referente en la labor de pensar la contraposición entre lo jurídico y lo político que está en la base de toda filosofía del derecho, con la aspiración al logro de la justicia internacional y la paz mundial en el horizonte.This article is a presentation of Alexandre Kojève’s philosophy of law, exposed in his Esquisse d’une phénoménologie du droit (1981). Little attention has been paid to this work. So there is a gap that has to be filled with a critical reflection of its strengths. Among them, undoubtedly, we count the fact that Kojève is introducing a conception of international justice that casts a singular light on current debates about cosmopolitanism and globalization. According to this author, citizenship is the key element of the process of global expansion of the juridical sphere. In sum, Kojève’s philosophy is useful to reflect upon the contrast between the juridical and the political, which is the basis for all philosophy of law, in order to achieve world peace and international justice.Este artículo es resultado del proyecto de investigación FFI2015-64858-P, titulado: Justicia y democracia: hacia un nuevo modelo de solidaridad, y financiado por el Ministerio de Economía y Competitividad (España)
Erratum to: The effect of self-explanation of pathophysiological mechanisms of diseases on medical students’ diagnostic performance
No full textIn the initial online publication, the name of author Alexandre Sampaio Moura was incorrectly captured as Alexandre Sampaio de Moura. This has now been corrected.</p
Sex and rhythms in sandflies and mosquitoes: An appreciation of the work of Alexandre Afranio Peixoto (1963–2013)
No full textAbstractI will briefly discuss the work of Alexandre A. Peixoto on sandflies and mosquitoes, focusing initially on his contributions to the population biology and phylogenetics of Brazilian populations of these important hematophagous insects. I shall also review some of his work on the underlying molecular clocks that mediate rhythmic behaviour and physiology in these species
La dame de Monsoreau /
No full textSequel: Les quarante-cinq.Sequel to La reine Margot.Written in collaboration with Auguste Maquet. cf. A.F. Davidson, Alexandre Dumas, 1902, p. 396.Mode of access: Internet
Le comte de Monte-Cristo,
No full textWritten in collaboration with Auguste Maquet and possibly P. A. Fiorentino. cf A. F. Davidson. Alexandre Dumas, 1902, p. 395.Mode of access: Internet
Edição anotada e estudo das narrativas históricas de Alexandre Herculano situadas entre 1367 a 1433.
No full textThis thesis proposes a annotated edition and a study of the historical narratives of
Alexandre Herculano located between 1367-1433, Arras forum for Spain, The vault,
and Castle of Faria in this period include the reign of Ferdinand and D . John I. Such
narratives were published at the beginning of the Portuguese Romanticism initially in
journals of Portuguese journals then were gathered in volumes with other historical
narratives of the author, and published under the title Legends and Lore. This research
was developed from concern over the lack of this material in our academic context, it is
noteworthy that other works of Herculaneum are much more affordable and therefore
more known and studied, for example, the novels The Fool ( 1843), Eurico the priest
(1844), and the Monk Cistercian (1848). This annotated edition proposal, we intend
school player, college player, even the lay reader in general. Therefore, we intend to put
the scope of this public an issue with notes to assist them while reading these stories, to
have an enriched text with relevant information to clarify and enable a better
understanding of it.
Keywords: Historical Narratives; Annotated Edition; Alexandre Herculano.Esta dissertação apresenta uma proposta de edição anotada e um estudo das narrativas
históricas de Alexandre Herculano situadas entre 1367 a 1433, Arras por Foro de
Espanha, A Abóbada, e O Castelo de Faria. A este período compreendem o reinado de
D. Fernando e D. João I. Tais narrativas foram publicadas no início do Romantismo
português, inicialmente, em periódicos de revistas portuguesas, em seguida, foram
reunidas em volumes com outras narrativas históricas deste autor, e publicadas sob o
título de Lendas e Narrativas. Esta pesquisa desenvolveu-se a partir da inquietação
suscitada pela carência deste material em nosso contexto acadêmico. Vale ressaltar, que
outras obras de Herculano são bem mais acessíveis, e por consequência mais conhecidas
e estudadas, como, por exemplo, os romances O Bobo (1843), Eurico o Presbítero
(1844), e O Monge de Cister (1848). Nesta proposta de edição anotada, temos em vista
o leitor escolar, o leitor universitário, até mesmo, o leitor leigo em geral. Por isso,
pretendemos colocar ao alcance deste público uma edição com anotações que os
auxiliem durante a leitura destas narrativas, ao terem um texto enriquecido com
informações pertinentes que esclareçam e possibilitem sua compreensão.
Palavras Chave: Narrativas históricas; Edição anotada; Alexandre Herculano
Multi-Spectral Reflection Matrix Processing
No full text<p>This repository contains the code for the article entitled "Multi-Spectral Reflection Matrix for Ultra-Fast 3D Label-Free Microscopy"</p>
<p>Authors: <a href="https://arxiv.org/search/physics?searchtype=author&query=Balondrade,+P">Paul Balondrade</a>, <a href="https://arxiv.org/search/physics?searchtype=author&query=Barolle,+V">Victor Barolle</a>, <a href="https://arxiv.org/search/physics?searchtype=author&query=Guigui,+N">Nicolas Guigui</a>, <a href="https://arxiv.org/search/physics?searchtype=author&query=Auriant,+E">Emeric Auriant</a>, <a href="https://arxiv.org/search/physics?searchtype=author&query=Rougier,+N">Nathan Rougier</a>, <a href="https://arxiv.org/search/physics?searchtype=author&query=Boccara,+C">Claude Boccara</a>, <a href="https://arxiv.org/search/physics?searchtype=author&query=Fink,+M">Mathias Fink</a>, <a href="https://arxiv.org/search/physics?searchtype=author&query=Aubry,+A">Alexandre Aubry</a></p>
<p>Year: 2023</p>
<p>Preprint arXiv:2309.10951</p>
Rhizarian 'Novel Clade 10' Revealed as Abundant and Diverse Planktonic and Terrestrial Flagellates, including Aquavolon n. gen
No full textRhizarian 'Novel Clade 10' (NC10) is frequently detected by 18S rRNA gene sequencing studies in freshwater planktonic samples. We describe a new genus and two species of eukaryovorous biflagellate protists, Aquavolon hoantrani n. gen. n. sp., and A. dientrani n. gen. n. sp., which represent the first morphologically characterized members of NC10, here named Aquavolonida ord. nov.. The slightly metabolic cells possess naked heterodynamic flagella, whose kinetosomes lie at a right angle to each other and are connected by at least one fibril. Unlike their closest known relative Tremula longifila, they rotate around their longitudinal axis when swimming and only very rarely glide on surfaces. Screening of a wide range of environmental DNA extractions with lineage-specific PCR primers reveals that Aquavolonida consists of a diverse radiation of protists, which are most diversified in freshwater planktonic habitats and as yet undetected in marine environments. Earlier branching lineages in Aquavolonida include less frequently detected organisms from soils and freshwater sediments. The 18S rRNA gene phylogeny suggests that Aquavolonida forms a common evolutionary lineage with tremulids and uncharacterized 'Novel Clade 12', which likely represents one of the deepest lineages in the Rhizaria, separate from Cercozoa (Filosa), Endomyxa and Retaria
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