286 research outputs found

    Examination of Eco-Behavioral Assessments Designed for Understanding Complex Behaviors and Environments.

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    Second-generation intervention research requires methods for overcoming challenges to understanding complex learning ecologies and interactions of students. Eco-behavioral assessments (EBAs) are one solution to past intervention research challenges. EBAs record the effects of ecological variables in students’ behavior and daily interactions. The utility of EBAs in second-generation research has increased substantially. Numerous EBAs now exist for use with all ages of learners and provide a valid, reliable, and cost effective method for intervention research. This paper examines 18 EBAs as well as software systems designed to support and enhance the use of EBAs. The examination serves as a comprehensive resource to better understand how EBAs can be used in answering complex questions about students’ learning and for advancing second-generation research

    Sudden emergence of q-regular subgraphs in random graphs

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    We investigate the computationally hard problem whether a random graph of finite average vertex degree has an extensively large qq-regular subgraph, i.e., a subgraph with all vertices having degree equal to qq. We reformulate this problem as a constraint-satisfaction problem, and solve it using the cavity method of statistical physics at zero temperature. For q=3q=3, we find that the first large qq-regular subgraphs appear discontinuously at an average vertex degree c_\reg{3} \simeq 3.3546 and contain immediately about 24% of all vertices in the graph. This transition is extremely close to (but different from) the well-known 3-core percolation point c_\cor{3} \simeq 3.3509. For q>3q>3, the qq-regular subgraph percolation threshold is found to coincide with that of the qq-core.Comment: 7 pages, 5 figure

    INTEROPERABILIDADE Bim e Bem: Avaliação de Eficiência do Sistema na Análise Energética de Edifícios

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    A crescente demanda energética impõe quebra de paradigmas no que diz respeito às questões das fontes geradoras e os meios de tornar a sua utilização mais sustentável. A indústria da construção civil possui o papel importante, considerando que o consumo energético do setor é bastante significativo em todo o ciclo de vida de uma edificação, no entanto, uma série de ferramentas tem surgido com intuito de tornar o setor de Arquitetura, Engenharia e Construção AEC, mais eficiente e com menor impacto ambiental, sendo o Building Information Modeling BIM e os programas de modelagem energética da edificação (BEM Building Energy Modeling) integrantes deste grupo. A pesquisa avaliou o desempenho da interoperabilidade entre as ferramentas do BIM e BEM após o compartilhamento dos modelos Referência e Ajustado, e os seus parâmetros calculados pelo Método Prescritivo do RTQ-C. Os modelos criados da edificação padrão tiveram as suas envoltórias detalhadas na ferramenta do BIM da Autodesk®, o Revit® Architecture e compartilhados com as ferramentas BEM Green Building Studio; EnergyPlus; eQUEST; DesignBuilder; IES-VE; OpenStudio e Insight por meio de dois formatos padrões de interoperabilidade, IFC e gbXML, e os derivados do gbXML IDF e INP. Três ferramentas não realizaram as simulações após a interoperabilidade, sejam importando arquivos gbXML e IFC ou carregando os arquivos IDF e INP. Entre as ferramentas que realizaram as simulações, somente o EnergyPlus apresentou resultado coerente e consistente após carregar os arquivos IDF derivados do gbXML da ferramenta Green Building Studio e do plugin Insight. Palavras-chave: Interoperabilidade, BIM, BEM, IFC, gbXML, eficiência energética

    Development and characterization of microsatellite loci for Tabebuia cassinoides (Bignoniaceae)

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    Tabebuia cassinoides (Lam.) DC., popularly known as caxeta, is a tree species that belongs to the plant family Bignoniaceae. This species is endemic to the Brazilian Atlantic Forest and is widely exploited commercially. To date, little is known about its genetic structure, preventing the establishment of adequate management plans for this taxon. The objective of this study was to construct a microsatellite-enriched genomic library for T. cassinoides to select polymorphic loci, and standardize polymerase chain reaction amplification conditions. Of the 15 loci examined, 5 were polymorphic. The number of alleles per locus ranged from 2 to 8, with a mean of 4.4. The microsatellite loci described here represent the basis for detailed population genetic studies of this species, which will greatly contribute for the development of better conservation strategies for this taxon. Tabebuia cassinoides (Lam.) DC., popularly known as caxeta, is a tree species that belongs to the plant family Bignoniaceae. This species is endemic to the Brazilian Atlantic Forest and is widely exploited commercially. To date, little is known about its genetic structure, preventing the establishment of adequate management plans for this taxon. The objective of this study was to construct a microsatellite-enriched genomic library for T. cassinoides to select polymorphic loci, and standardize polymerase chain reaction amplification conditions. Of the 15 loci examined, 5 were polymorphic. The number of alleles per locus ranged from 2 to 8, with a mean of 4.4. The microsatellite loci described here represent the basis for detailed population genetic studies of this species, which will greatly contribute for the development of better conservation strategies for this taxon13356015605CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQCOORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPESFUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP142040/2009-6; 305102/2010-9sem informação2010/20548-

    Development And Characterization Of Microsatellite Loci For Tabebuia Cassinoides (bignoniaceae).

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    Tabebuia cassinoides (Lam.) DC., popularly known as caxeta, is a tree species that belongs to the plant family Bignoniaceae. This species is endemic to the Brazilian Atlantic Forest and is widely exploited commercially. To date, little is known about its genetic structure, preventing the establishment of adequate management plans for this taxon. The objective of this study was to construct a microsatellite-enriched genomic library for T. cassinoides to select polymorphic loci, and standardize polymerase chain reaction amplification conditions. Of the 15 loci examined, 5 were polymorphic. The number of alleles per locus ranged from 2 to 8, with a mean of 4.4. The microsatellite loci described here represent the basis for detailed population genetic studies of this species, which will greatly contribute for the development of better conservation strategies for this taxon.135601-

    approach to a water safety plan for recreational waters disinfection of a drainage pumping station as an unconventional point source of fecal contamination

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    Abstract In the context of the management of bathing water quality, the intermittent contamination of rainwater drainage pumps (unconventional point sources) could be controlled by peracetic acid disinfection. Thus, a field experimental study was carried out to set up a water safety plan, determining the monitoring parameters and the critical limit for corrective actions. With a 0.5 mg/l dosage, the average logarithmic microbial reduction was 0.50 ± 0.48 for Escherichia coli (EC) and 0.43 ± 0.54 for intestinal enterococci. Among the chemical and physical parameters that could be monitored in real time, the oxidation–reduction potential was the only one able to predict the microbial concentration discharged from a drainage pump and the logarithmic abatement of EC. Considering the possible impact of this source on bathing waters in terms of additional risk of gastrointestinal infections, the critical limit for continuous monitoring was established using a quantitative microbial risk assessment (QMRA) model

    Sperm quality assessment in Ficopomatus enigmaticus (Fauvel, 1923): Effects of selected organic and inorganic chemicals across salinity levels

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    Contamination by organic and inorganic compounds remains one of the most complex problems in both brackish and marine environments, causing potential implications for the reproductive success and survival of several broadcast spawners. Ficopomatus enigmaticus is a tubeworm polychaete that has previously been used as a model organism for ecotoxicological analysis, due to its sensitivity and ecological relevance. In the present study, the effects of five trace elements (zinc, copper, cadmium, arsenic and lead), one surfactant (sodium dodecyl sulfate, SDS) and one polycyclic aromatic hydrocarbon (benzo(a)pyrene, B(a)P) on the sperm quality of F. enigmaticus were investigated. Sperm suspensions were exposed in vitro to different concentrations of each selected contaminant under four salinity conditions (10, 20, 30, 35). Possible adverse effects on sperm function were assessed by measuring oxidative stress, membrane integrity, viability and DNA damage. Sperm quality impairments induced by organic contaminants were more evident than those induced by inorganic compounds. SDS exerted the largest effect on sperm. In addition, F. enigmaticus sperm showed high tolerance to salinity variation, supporting the wide use of this species as a promising model organism for ecotoxicological assays. Easy and rapid methods on polychaete spermatozoids were shown to be effective as integrated sperm quality parameters or as an alternative analysis for early assessment of marine and brackish water pollution

    Polymers with attractive interactions on the Husimi tree

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    We obtain the solution of models of self-avoiding walks with attractive interactions on Husimi lattices built with squares. Two attractive interactions are considered: between monomers on first-neighbor sites and not consecutive along a walk and between bonds located on opposite edges of elementary squares. For coordination numbers q>4, two phases, one polymerized the other non-polymerized, are present in the phase diagram. For small values of the attractive interaction the transition between those phases is continuous, but for higher values a first-order transition is found. Both regimes are separated by a tricritical point. For q=4 a richer phase diagram is found, with an additional (dense) polymerized phase, which is stable for for sufficiently strong interactions between bonds. The phase diagram of the model in the three-dimensional parameter space displays surfaces of continuous and discontinuous phase transitions and lines of tricritical points, critical endpoints and triple points.Comment: 7 pages, 6 figure
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