114,393 research outputs found
First page of a letter to Felipe Chaves
No full textFirst page of a letter to Felipe Chaves from Alfred H. McDermott, regarding Gregg's Commerce of the Prarie
Alocação de chaves automatizadas em redes de distribuição utilizando múltiplos critérios
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Elétrica.O presente trabalho tem como objetivo o desenvolvimento de uma metodologia para a alocação de chaves automatizadas em redes de distribuição, utilizando ferramentas de otimização multicritério para atender a diferentes políticas de desempenho. Devido à complexidade do problema, a metodologia foi divida em três partes, denominadas de módulos. O primeiro módulo a ser executado é o Modulo de Reconfiguração, cuja função principal é estabelecer os pontos candidatos à alocação de uma chave automatizada. A seguir, o Módulo de Confiabilidade calcula para estes pontos o impacto nos índices de confiabilidade causados pela alocação de uma chave. O terceiro e último módulo, o Módulo Multicritério, é responsável pelo cálculo da ordem de mérito (hierarquização) das posições candidatas a receberem uma chave, de acordo com as preferências do decisor. A metodologia para alocação de chaves automatizadas foi aplicada em um sistema teste composto por três alimentadores obtidos na literatura internacional e em um sistema composto por dois alimentadores baseados em dados de consumidores e cargas reais e também nas configurações e registros de falhas, manobras e manutenção de uma concessionária brasileira. Os resultados obtidos demonstram a viabilidade da metodologia desenvolvida e mostram os ganhos introduzidos ao sistema com a alocação de chaves automatizadas
Projeto de um provedor de serviços criptográficos embarcado para infra-estrutura de chaves públicas e suas aplicações
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Ciência da Computação.Esta dissertação de mestrado contém uma proposta para o projeto de um provedor de serviços criptográficos embarcado para uso em infra-estruturas de chaves públicas -ICP- e suas aplicações. O projeto consiste na especificação de um modelo de gerenciamento de chaves apoiado por um equipamento especialmente projetado para este fi
Data on the activity patterns and diet of the adult male and a lactating female of a wild brown howler monkey group
No full textHere we provided the main datasets used to run the GLMMs of the following paper:
Chaves OM, Martins V, Camaratta D, and Bicca-Marques JC. 2019. Successful adoption of an orphan infant in a wild group of brown howler monkeys". Primates
The study group was followed for 293 h distributed in 29 sampling days from April 2013 to January 2014 and the behavioral observations were collected using two methods: instantaneous scans and focal animal. In these datasets we provided detailed information on the diet and activity patterns of both the adoptive mother (Sofia) and the adut male. These datasets were used to run the GLMM models described in the main manuscript.
Specifically, we provided the following datasets:
1) data_behavior_by_individual_Dec19.xlsx: data on the behavior of the adoptive mother (Sofia) and the adult male, including detailed information on the food species exploited.
2) dataset_activity_patterns_Sofia.xlsx: dataset on the activity patterns of the adoptive mother including the bootstrap samples
3) dataset_activity_patterns_adult_male.xlsx: dataset on the activity patterns of the adult male including the bootstrap samples
4) R_scripts_to_construct_Fig2_and_Fig3.docx: R scripts used to construct the figures 2 and 3 using the R program ggplot2
Data on the activity patterns and diet of the adult male and a lactating female of a wild brown howler monkey group
No full textHere we provided the main datasets used to run the GLMMs of the following paper: Chaves OM, Martins V, Camaratta D, and Bicca-Marques JC. 2019. Successful adoption of an orphan infant in a wild group of brown howler monkeys". PrimatesThe study group was followed for 293 h distributed in 29 sampling days from April 2013 to January 2014 and the behavioral observations were collected using two methods: instantaneous scans and focal animal. In these datasets we provided detailed information on the diet and activity patterns of both the adoptive mother (Sofia) and the adut male. These datasets were used to run the GLMM models described in the main manuscript.Specifically, we provided the following datasets:1) data_behavior_by_individual_Dec19.xlsx: data on the behavior of the adoptive mother (Sofia) and the adult male, including detailed information on the food species exploited.2) dataset_activity_patterns_Sofia.xlsx: dataset on the activity patterns of the adoptive mother including the bootstrap samples3) dataset_activity_patterns_adult_male.xlsx: dataset on the activity patterns of the adult male including the bootstrap samples4) R_scripts_to_construct_Fig2_and_Fig3.docx: R scripts used to construct the figures 2 and 3 using the R program ggplot2
El periodismo y la historia: Chaves Nogales y la Revolución rusa
No full textThe objective of this article is to show how the picture Manuel Chaves Nogales presented of the Russian Revolution through his articles in the 30’s, the vanguard of journalism of that time, had a historical meaning. The hypothesis proposed is that journalism reporting on the present can also provide historians with some lessons. To show the historical awareness of Chaves Nogales’ journalism, the author is contextualized among other travelers to the Soviet Union of that time. The way in which Chaves interprets the traces of the Revolution in people and their environment and how these relate to microhistory are studied.El objetivo de este artículo es mostrar cómo la imagen que dio Manuel Chaves Nogales de la revolución rusa a través de sus artículos en los años treinta, siendo vanguardia del periodismo de entonces, tuvo un sentido histórico. La hipótesis es que el periodismo, informando sobre el presente, puede aportar a los historiadores alguna lección. Para mostrar la conciencia histórica del periodismo de Chaves Nogales se contextualiza al autor entre otros viajeros de la época a la Unión Soviética, se analiza la manera en la que Chaves interpreta las huellas de la revolución en las personas y en su entorno y se relaciona con la microhistoria
Water relations of the grape berry and aquaporins
No full textBerry water content during development and at harvest is a crucial parameter of the vintage quality by directly impacting the concentration of sugars and flavour compounds. In the last decade, there has been considerable progress in understanding how berry water relations are involved in the ripening process as a result of exploring and integrating developmental changes in berry hydraulic conductivity, mineral nutrient loading, phloem unloading, xylem development, functionality of xylem vessels, cell vitality, cell water relations, gene expression and the molecular biology of aquaporins (water channels). In this chapter, we review the most recent advances in our understanding of the berry water influx and efflux during development and their consequences on cell turgor and apoplast solute concentrations, taking account of the changes in cell vitality observed late in ripening in some varieties. The role of aquaporins in the regulation of berry water relations is also presented, with a particular emphasis on the varietal differences observed in aquaporin functioning. Finally, the impact of water status of the parent vine on berry ripening is discussed. From this review, it appears that the varietal differences observed at different regulatory levels of berry water status represent a great opportunity to gain a better understanding of the ripening process.S. D. Tyerman, M. M. Chaves and F. Barrie
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Infraestrutura de chaves públicas otimizadora
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Ciência da Computação, Florianópolis, 2010Este trabalho tem como objetivo propor e implementar um novo conceito de certificado: o Certificado Otimizado, base da Infraestrutura de Chaves Publicas Otimizadora. Trata-se de adaptaçoes ao padrao X.509 para reduzir o esforço computacional necessario ao uso de documentos eletronicos assinados sem a perda da compatibilidade com as aplicaçoes existentes. Tal reduçao incide na verificação de assinaturas digitais, pois o Certificado Otimizado: (1) dispensa verificaçao de situaçao de revogaçao; (2) substitui carimbos do tempo sobre uma assinatura digital; (3) ´e emitido por uma Autoridade Certificadora cuja situaçao de revogaçao ´e aferida atraves do m´etodo Novomodo; e (4) possui um caminho de certificaçao curto. Esta proposta tamb´em explora a substituição de Certificados Otimizados quando da obsolescencia dos algoritmos criptograficos, tornando possivel a manutencão da autenticidade de assinaturas digitais sem o aumento contínuo dos recursos computacionais utilizados. Desta forma, beneficia diretamente verificadores de assinaturas digitais e entidades arquivisticas, as quais enfrentam o desafio de armazenar e manter validas assinaturas digitais sobre documentos eletronicos sem demandar quantidades impraticaveis de recursos computacionais. A soluçao proposta é comparada com o certificado X.509 convencional atrav´es da simulaçao de um cenario de documentos eletronicos assinados na ICP-Brasil. Os resultados da simulaçao demonstram que o Certificado Otimizado proporciona uma economia superior a 80% de recursos computacionais ao longo dos anos. Ainda, observa-se, atrav´es de testes realizados sobre a implementaçao do algoritmo Certificate Path Processing, presente na M´aquina Virtual Java, que o Certificado Otimizado ´e aderente ao padrao X.509 e, portanto, compatível com a maioria das aplicaçoes de certificaçao digital existentes. Sem duvida, tais características tornam o Certificado Otimizado uma atraente soluçao para reduzir os recursos computacionais necessarios no uso de documentos eletronicos assinados.This work deals with the proposal and the implementation of a new digital certificate concept: an Optimized Certificate, on which Optimizer Public Key Infrastructure is based. This concept implies some changes in the X.509 standard as a means to cut down on the computational effort required to use digital signatures on electronic documents, while keeping compatibility with existing applications. This reduction can be noted when verifying digital signatures because an Optimized Certificate: (1) dismisses the need to verify the revocation status; (2) replaces timestamps for a signature; (3) is issued by a Certification Authority whose revocation status is checked using Novomodo; and (4) presents a short certification path. Also, this proposal takes advantage of replacing an Optimized Certificate before cryptographic algorithms become weak, which makes it possible to maintain authentic digital signatures without requiring an ever-growing amount of computational resources. Therefore, Optimized Certificates benefit the verifiers of digital signatures and archiving entities, which have to overcome the challenge of storing and maintaining valid digital signature on electronic documents within computational resource constraints. The proposal is compared with the conventional X.509 certificate, considering the simulation of a scenario of signed electronic documents in ICP-Brasil. The result of this comparison reveals that an Optimized Certificate can lead to the reduction of computational resources along years at rates above 80%. Moreover, successful tests on the implementation of Certificate Path Processing available in Java Virtual Machine indicate that an Optimized Certificate adheres to X.509 and therefore, with regard to digital signatures, it is compatible with most existing applications. Indeed, such characteristics make Optimized Certificates an attractive solution to reduce the computational resources required for using signed electronic documents
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