Endurant Types in Ontology-Driven Conceptual Modeling: Towards OntoUML 2.0

For over a decade now, a community of researchers has contributed to the development of the Unified Foundational Ontology (UFO) - aimed at providing foundations for all major conceptual modeling constructs. This ontology has led to the development of an Ontology-Driven Conceptual Modeling language dubbed OntoUML, reflecting the ontological micro-theories comprising UFO. Over the years, UFO and OntoUML have been successfully employed in a number of academic, industrial and governmental settings to create conceptual models in a variety of different domains. These experiences have pointed out to opportunities of improvement not only to the language itself but also to its underlying theory. In this paper, we take the first step in that direction by revising the theory of types in UFO in response to empirical evidence. The new version of this theory shows that many of the meta-types present in OntoUML (differentiating Kinds, Roles, Phases, Mixins, etc.) should be considered not as restricted to Substantial types but instead should be applied to model Endurant Types in general, including Relator types, Quality types and Mode types. We also contribute a formal characterization of this fragment of the theory, which is then used to advance a metamodel for OntoUML 2.0. Finally, we propose a computational support tool implementing this updated metamodel

Spatio-temporal variability of sugarcane yield efficiency in the state of São Paulo, Brazil.

The objective of this work was to assess the spatial and temporal variability of sugarcane yield efficiency and yield gap in the state of São Paulo, Brazil, throughout 16 growing seasons, considering climate and soil as main effects, and socioeconomic factors as complementary. An empirical model was used to assess potential and attainable yields, using climate data series from 37 weather stations. Soil effects were analyzed using the concept of production environments associated with a soil aptitude map for sugarcane. Crop yield efficiency increased from 0.42 to 0.58 in the analyzed period (1990/1991 to 2005/2006 crop seasons), and yield gap consequently decreased from 58 to 42%. Climatic factors explained 43% of the variability of sugarcane yield efficiency, in the following order of importance: solar radiation, water deficit, maximum air temperature, precipitation, and minimum air temperature. Soil explained 15% of the variability, considering the average of all seasons. There was a change in the correlation pattern of climate and soil with yield efficiency after the 2001/2002 season, probably due to the crop expansion to the west of the state during the subsequent period. Socioeconomic, biotic and crop management factors together explain 42% of sugarcane yield efficiency in the state of São Paulo

Thermal evolution of hybrid stars within the framework of a nonlocal Nambu--Jona-Lasinio model

We study the thermal evolution of neutron stars containing deconfined quark matter in their core. Such objects are generally referred to as quark-hybrid stars. The confined hadronic matter in their core is described in the framework of non-linear relativistic nuclear field theory. For the quark phase we use a non-local extension of the SU(3) Nambu Jona-Lasinio model with vector interactions. The Gibbs condition is used to model phase equilibrium between confined hadronic matter and deconfined quark matter. Our study indicates that high-mass neutron stars may contain between 35 and 40 % deconfined quark-hybrid matter in their cores. Neutron stars with canonical masses of around $1.4\, M_\odot$ would not contain deconfined quark matter. The central proton fractions of the stars are found to be high, enabling them to cool rapidly. Very good agreement with the temperature evolution established for the neutron star in Cassiopeia A (Cas A) is obtained for one of our models (based on the popular NL3 nuclear parametrization), if the protons in the core of our stellar models are strongly paired, the repulsion among the quarks is mildly repulsive, and the mass of Cas A has a canonical value of $1.4\, M_\odot$.Comment: 10 pages, 7 figure

SPIDER X - Environmental effects in central and satellite early-type galaxies through the stellar fossil record

A detailed analysis of how environment affects the star formation history of early-type galaxies (ETGs) is undertaken via high signal to noise ratio stacked spectra obtained from a sample of 20,977 ETGs (morphologically selected) from the SDSS-based SPIDER survey. Two major parameters are considered for the study: the central velocity dispersion (sigma), which relates to local drivers of star formation, and the mass of the host halo, which relates to environment-related effects. In addition, we separate the sample between centrals (the most massive galaxy in a halo) and satellites. We derive trends of age, metallicity, and [alpha/Fe] enhancement, with sigma. We confirm that the major driver of stellar population properties in ETGs is velocity dispersion, with a second-order effect associated to the central/satellite nature of the galaxy. No environmental dependence is detected for satellite ETGs, except at low sigma - where satellites in groups or in the outskirts of clusters tend to be younger than those in the central regions of clusters. In contrast, the trends for centrals show a significant dependence on halo mass. Central ETGs in groups (i.e. with a halo mass >10^12.5 M_Sun) have younger ages, lower [alpha/Fe], and higher internal reddening, than "isolated" systems (i.e. centrals residing in low-mass, <10^12.5 M_Sun, halos). Our findings imply that central ETGs in groups formed their stellar component over longer time scales than "isolated" centrals, mainly because of gas-rich interactions with their companion galaxies.Comment: 22 pages, 19 figures, accepted for publication in MNRA

Estudos filogenéticos e de diversidade em Capsicum e sua aplicação na conservação e uso de recursos genéticos das espécies C. frutescens E C. chinense.

No presente trabalho, estudou-se a variabilidade genética de um banco de germoplasma com 115 acessos de C. frutescense 480 de C. chinense visando subsidar ações de conservação e uso dos recursos genéticos.Resumo CBRG 269

Avaliação do potencial de armazenamento de sementes de genótipos de Guandu (Cajanus Cajan (L.) Millsp).

Sementes de dez genótipos de guandu foram avaliadas quanto ao potencial de armazenamento através de testes de envelhecimento acelerado e de germinação após armazenamento em condições ambientais não controladas por seis meses. Os genótipos g3, g5, g19b e g58 apresentaram os melhores resultados no teste de envelhecimento acelerado, enquanto que após o armazenamento em condições ambientais não houve diferenciação entre os genótipos quanto apresentaram os melhores resultados no teste de envelhecimento acelerado, enquanto que após o armazenamento em condições ambientais nao houve diferenciação entre os genótipos quanto a sua capacidade germinativa. O primeiro teste, portanto, revelou-se mais eficiente para predizer o potencial de armazenameto, permitindo a classificação dos genótipos de guandu

Desempenho produtivo de cultivares de girassol (Helianthus annuus L.) sob condições irrigadas no Rio Grande do Norte.

Este trabalho teve como objetivo avaliar o desempenho produtivo de cultivares de girassol em regime de irrigação. O ensaio foi conduzido na Estação Experimental da EMPARN, (Ipanguaçu,RN, 05º37? S 36º50? W , 70 m). O solo foi é um Neossolo de alta fertilidade, com adubação de 50-20-20 kg/ha + 2kg de Boro.. Utilizou-se irrigaçãoi por sulco e durante o ciclo da cultura foram aplicados 510 mm de água.. Foram avaliadas 26 cultivares, sendo 24 híbridos e 02 variedades em foi blocos ao acaso, com 04 repetições. As médias de rendimentos de grãos (aquênios) variaram de 2.110 kg/ha a 4.120 kg/ha, com média de 3.218 kg/ha. Sobressaíram-se os híbridos GRIZZLY, T 700, MG 52, NEON, HLS 03 e o HÉLIO 358, com respectivamente, 4.120 kg/ha, 4.097kg/ha, 3.705kg/ha, 3.638 kg/ha, 3.633 kg/ha e 3.610 kg/ha. Os maiores rendimentos de óleo foram obtidos com os genótipos MG 52, HÉLIO 358, HLS 03 e BRS-Gira 11, acima de 1.500kg/ha

Avaliação temporal de genótipos de girassol no cerrado do Distrito Federal em safrinha.

Resumo: Com o objetivo de avaliar o comportamento agronômico de genótipos de girassol no cerrado do Distrito Federal, foram conduzidos ensaios na safrinha dos anos de 2011 e 2012, em delineamento experimental de blocos ao acaso com quatro repetições. Os caracteres avaliados foram rendimento de grãos, tamanho do capítulo, peso de mil aquênios, altura de plantas, dias para floração inicial e teor de óleo. Foram observadas diferenças altamente significativas entre os genótipos para todas as características morfoagronômicas avaliadas. Em relação ao rendimento de grãos, em 2011, esta característica variou de 2.376 kg.ha (SRM 822) a 5.490 kg.ha (BRSG 30) e, em 2012, de 2.306 kg.ha (V60415) a 4.412 kg.ha (SYN 039A). Materiais genéticos promissores para as características agronômicas avaliadas foram identificados no trabalho, podendo ser explorados comercialmente em condições de safrinha do Cerrado. Abstract : Aiming to evaluate the agronomic performance of sunflower genotypes in the Savannah of the Federal District, experiments were conducted in the second crop of 2011 and 2012 in a randomized block design with four replications. The characters evaluated were grain yield, head length, weight of thousand achenes, plant height, days to initial flowering and oil content. Differences among genotypes for all traits morphoagronomic were highly significant. In relation to grain yield in 2011, this feature[ ranged from 2376 kg.ha (SRM 822) to 5,490 kg.ha (BRSG 30) and, in 2012, from 2,306 kg.ha (V60415) to 4412 kg.ha (SYN 039A). Genetic materials promising for agronomic traits were identified in work and can be commercially exploited in the second crop of Savannah