Typifications in the genus Trichocline (Asteraceae: Mutisieae)

Fil: Pasini, Eduardo. Programa de Pós-GraduaçÆo em Botânica. Universidade Federal do Rio Grande do Sul. Porto Alegre. Rio Grande do Sul; BrazilFil: Katinas, Liliana. División Plantas Vasculares. Facultad de Ciencias Naturales y Museo. Universidad Nacional de La Plata; Argentin

Trichocline maxima (Compositae, Mutisieae) a rare Pampean daisy rediscovered after 70 years in Uruguay

Trichocline maxima was considered probably extinct but has been rediscovered in northern Uruguay after almost 70 years since its last record in this country. We provide an updated description of the species, an indication of a lectotype and we discuss morphology, taxonomy, nomenclature, geographical distribution, and conservation status of the species. An identification key for the species of the genus in Uruguay and Brazil is also presented.Trichocline maxima (Compositae, Mutisieae) redescoberta: Taxonomia, lectotipificação, e estado de conservação de uma Asteraceae rara e endêmica do Pampa. Trichocline maxima era considerada como provavelmente extinta, mas foi redescoberta no norte do Uruguai após quase 70 anos desde sua última coleta neste país. Neste trabalho são fornecidas descrição atualizada da espécie, a indicação de um lectótipo e discussão sobre aspectos morfológicos, taxonômicos, nomenclaturais, de distribuição geográfica e estado de conservação. Também é presentada uma chave de identificação para as espécies do gênero no Uruguai e no Brasil

Home at last: the enigmatic genera Eriachaenium and Adenocaulon (Compositae, Mutisioideae, Mutisieae, Adenocaulinae)

The genera Eriachaenium and Adenocaulon (Compositae) have distinct but complex histories and both have been placed in a number of tribes across the family. For the first time the two genera are included in a molecular study and the results show that they are best placed in the tribe Mutisieae s.s. and are the only genera in the re-instated subtribe Adenocaulinae. When described, this subtribe contained only Adenocaulon and was found in the Inuleae. The study also confirms one of the conclusions of a recent morphological study that Eriachaenium and Adenocaulon are sister taxa. Past difficulties in tribal assignment are attributed to the distinct and unusual morphology of each genus. Both genera and the subtribe are described and a key to separate the genera is provided.Facultad de Ciencias Naturales y Muse

O gênero Trichocline Cass. (Asteraceae, Mutisieae) no Rio Grande do Sul, Brasil

The present work refers to the floristic and taxonomic studies of Trichocline Cass. in the state of Rio Grande do Sul, southern Brazil. Most of the species occur in South America, with the exception of one species that are found in Australia. The study was based on literature revision, field trips collections to all physiographic regions of the state and the study of the specimens of the most representative herbariums for the Rio Grande do Sul’s flora. The ocurrence of six species of Trichocline were confirmed: T. catharinensis Cabrera, T. cisplatina E. Pasini & M.R. Ritter, T. humilis Less., T. incana Cass., T. macrocephala Less. and T. maxima Less. We provide key for species identification, descriptions with illustrations, considerations about geographical distribution, habitat, phenology, vernacular names, and general observations on each species conservation status in the State.O presente trabalho refere-se ao estudo florístico e taxonômico de Trichocline Cass. no estado do Rio Grande do Sul, Brasil. As espécies ocorrem na América do Sul, apresentando somente uma na Austrália. Para o presente estudo realizou-se viagens a campo a todas as regiões fisiográficas do Estado, análise de materiais de herbários e revisão de literatura referente aos gêneros. Foram confirmadas seis espécies: T. catharinensis Cabrera, T. cisplatina E. Pasini & M. R. Ritter, T. humilis Less., T. incana Cass., T. macrocephala Less., T. maxima Less. São fornecidas chaves de identificação para as espécies, descrições com ilustrações, considerações sobre distribuição geográfica, habitat, floração e frutificação, nomes populares e o atual estado de conservação de cada espécie no estado

E-government: el voto electrónico sobre Internet

This paper presents a first experience in E-Voting over Internet, integrating students from different regional centers of the School of Computer Science at National University of La Plata. System hardware architecture and some important software aspects are discussed compared with previous R&D work of the same group. Finally the main related research lines are presented, focusing on the use of technology in E-Government applications.Se presenta una primera experiencia de voto electrónico sobre Internet que permite integrar en las elecciones estudiantiles de la UNLP el voto de los centros regionales. La arquitectura de hardware del sistema y las características distintivas del software son analizadas como una evolución de desarrollos previos del grupo de I/D. Por último las líneas de I/D en curso en este tema y en general en E-Government son brevemente expuestas.Workshop de Ingeniería de Software y Bases de Datos (WISBD

Complex electronic voting systems

An on-site electronic voting system is analyzed for distributed environments, with multiple simultaneous election models and different types of voters, used for periods longer than one day and with real-time counting of votes. This type of complex study cases is related to requirements of the UNLP combining various organizational levels (professors, assistants in charge of assignments, graduate aides, external graduates, students, and non-teaching staff) in elections where each of these groups has different characteristics and representations for governmental bodies: Assembly, High Council, Boards of Directors and Students Government Associations at the different Schools. Representation is different, among other aspects, in relation to numbers and the ways in which majority and minority are expressed. These functional complexities are added to the geographical distribution context of the election locations, with several Schools having regional centers in the Province of Buenos Aires, and the duration of the elections, since they typically take place in periods ranging from one to three days.Trabajo presentado en el XVIII Congreso Argentino de Ciencias de la Computación-CACIC 2012, realizado los días 8 al 12 de octubre 2012 en Bahía Blanca, Buenos Aires, Argentina

Influence of Pectin as a green polymer electrolyte on the transport properties of Chitosan-Pectin membranes

Novel blend membranes have been prepared from Chitosan (CH), Pectin (PEC) andtheir mixtures. The obtained samples were cross-linked and sulfonated beforecharacterization. The results show that CH/PEC membranes display structural changes on the chemical and physical properties as a function of composition. DSC analysis reveals an endothermic peak due to the scission of the ionic pairs between carboxylic groups and ammonium groups, which produces a strong change on physical properties such as methanol permeability and proton conductivity. The methanol permeability decreases with the amount of Pectin from (4.24±0.04)x10-6 cm2/s for pure Chitosan membrane to (1.51±0.03)x10-6 cm2/s for blend CH/PEC membranes when the amount of Pectin is 50% (v/v). The proton conductivities of the blend membranes follow a similar behavior. For a pure CH membrane the conductivity is 2.44x10-3 S/cm, decreasing with pectin content until the composition 50/50 (v/v), in which the conductivity drops almost one order of magnitude.Fil: Pasini Cabello, Sergio David. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich". Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich"; ArgentinaFil: Ochoa, Nelio Ariel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich". Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich"; ArgentinaFil: Takara, Eduardo Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich". Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich"; ArgentinaFil: Mollá, Sergio. Universidad Politécnica de Valencia; EspañaFil: Compañ, Vicente. Universidad Politécnica de Valencia; Españ

Biometric identification in electronic voting systems

An extension of previous developments of electronic voting and e-government systems carried out at the School of Computer Science of the UNLP is presented, where a digital fingerprint recognition feature is added to the existing system used for faculty elections at this School.\nThe characteristics and performance of the biometric recognition system are analyzed, as well as the modification of the on-site electronic voting system used in La Plata (hardware and software) and the adaptation to an Internet voting system that can be used at Regional Centers.\nFinally, the generalizations of the use of the technology developed for e-government are discussed and current research and development lines are mentioned.Eje: I Workshop Innovación en Sistemas de Software (WISS

Impacto das mudanças climáticas no contexto do patrimônio cultural de cidades europeias e brasileiras: breve panorama de estudos sobre o tema entre 2000 e 2020

The adaptation of climate change phenomenon is an issue of great importance in the actual context of public policies for urban planning. When it comes to sites of cultural-historical value and cultural heritage assets, the effect of climate change can pose a major challenge to ensuring their conservation. Thus, the present paper aims to present a narrative literature review of scientific articles and reference bibliography about the impact of climate change on heritage, critically comparing the Brazilian case with the international context, especially the European one. It was stipulated as the temporal delimitation of the last two decades, between 2000 and 2020, five years after the first global climate conference of the UN (United Nations), with the consolidation of the climate commitment and the expansion of signatory countries. The applied methodology is the bibliographic review and compilation of the data obtained from the publications, making use of the critical-comparative analysis. As a result, it is expected to contribute to the state of the art on the subject, reflecting on the aspects necessary to advance the subject in the Brazilian sphere.A adaptação ao fenômeno das mudanças climáticas é uma questão de grande importância no atual contexto de políticas públicas voltadas ao planejamento urbano das cidades. Em se tratando de sítios de valor histórico-cultural e de bens pertencentes ao patrimônio cultural, o efeito das mudanças climáticas pode acarretar um grande desafio para a garantia da sua conservação. Assim, o presente artigo tem como objetivo apresentar uma revisão narrativa da literatura de artigos científicos e bibliografia de referência sobre o tema do impacto das mudanças climáticas no âmbito patrimonial, comparando criticamente o caso brasileiro com o contexto internacional, sobretudo europeu. Estipulou-se como delimitação temporal o período das duas últimas décadas, entre 2000 e 2020, cinco anos após a primeira conferência mundial sobre o clima da ONU (Organização das Nações Unidas), com a consolidação do compromisso climático e a ampliação de países signatários. A metodologia aplicada é a revisão bibliográfica e compilação dos dados obtidos das publicações, fazendo uso da análise crítica-comparativa. Como resultado, espera-se contribuir com o estado da arte sobre a temática, refletindo sobre os aspectos necessários para avançar no campo na esfera brasileira

Numerical simulation of vibrated granular gases under realistic boundary conditions

A variant of the Direct Simulation Monte Carlo method is used to study the behavior of a granular gas, in two and three dimensions, under varying density, restitution coefficient, and inelasticity regimes, for realistic vibrating wall conditions. Our results agree quite well with recent experimental data. The role of the energy injection mechanism is discussed, as well as the behavior of state-functions, such as pressure, under realistic boundary conditions. Upon a density increase, we find signals of a clustering transition.Comment: Latex, 12 EPS figures (to appear in Physica A