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| Registros recuperados: 1.831 | |
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| Carvalho,David de; Fujii,Armando K.; Paschoalin Filho,João A.; Cury Filho,Dirney; Silva,Marccella B. M.. |
| ABSTRACT Wind solicitations generate horizontal, tensile, and compressive stresses on building foundations. In empty light structures, such as agricultural greenhouses and, in the specific case of silos and elevated structures such as metal water tanks, the consideration of these loads becomes important because the lack of the weight component due to the storage load significantly influences the balance of forces. This study focused on the behavior of metallic steel profiles, aiming at its application as a foundation element for the pile, considering the soil of Diabasic origin common to the Center-South region of Brazil. Load tests in real scale were carried out on three steel profiles, type I, gauge W 250 mm x 32.7 kg m-1, drilled in the ground up to 12m... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Foundations; Piles; Wind effect; Light structures; Load tests; Diabasic soil. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000300370 |
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| Lahr,Francisco A. R.; Nogueira,Marta C. de J. A.; Araujo,Victor A. De; Vasconcelos,Juliano S.; Christoforo,André L.. |
| ABSTRACT Over the years, the species of eucalyptus has become a multipurpose raw material. In addition, the most relevant aspect of the use for various purposes is related to the production of a high quality wood, coming from short duration plantations, which is fundamental to the current demand of the industries. However, its use in civil construction has not yet reached a level of importance, due to the low knowledge of many of its resistance properties and the consequent popular fear in the use of reforestation woods, in particular the Eucalyptus grandis. This research investigated its main mechanical properties, aiming to reinforce its constructive applications in wood structures. For this, two physical properties and fourteen mechanical properties, in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rose Gum; Eucalypt; Mechanical properties; Bulk density. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000500642 |
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| Flores,Rilner A.; Urquiaga,Segundo; Alves,Bruno J. R.; Collier,Leonardo S.; Boddey,Robert M.. |
| The objective of this study was to evaluate the performance of two genotypes of elephant grass, fertilized with and without N, for biomass production for energy use under the edaphoclimatic conditions of the Cerrado. The genotypes Roxo and Paraíso, grown in a field experiment in a Latosol in the Cerrado region were evaluated for biomass yield, nitrogen accumulation, C:N and stem:leaf ratios, fibre, ash and P and K contents and calorific value. The accumulated dry biomass ranged from 30 to 42 Mg ha-1 and showed no response to nitrogen fertilization with the lowest biomass obtained by the genotype Paraíso and the highest by Roxo. The total N accumulation followed the same pattern as for dry matter, ranging from 347 to 539 kg N ha-1. C:N and stem:leaf ratio... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pennisetum purpureum; Bioenergy; Nitrogen fertilizer. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000500003 |
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| Sousa,Carlos H. C. de; Lacerda,Claudivan F. de; Silva,Francisco L. B. da; Neves,Antonia L. R.; Costa,Raimundo N. T.; Gheyi,Hans R.. |
| The objective of this study was to evaluate the use of subsoiling, gypsum and organic matter associated with the cultivation of cotton, sunflower and cowpea in crop rotation, seeking the reclamation and use of a saline-sodic soil. The treatments were arranged in a randomized block design in split plots with four replications, during two crop cycles (2009/2010 and 2010/2011). The plots were formed by the treatments: T1. Subsoiling (S); T2. S + 20 Mg ha-1 of gypsum; T3. S + 40 Mg ha-1 of organic matter; T4. S + 10 Mg ha-1 of gypsum + 20 Mg ha-1 of organic matter; T5. S + 20 Mg ha-1 of gypsum + 40 Mg ha-1 of organic matter and the sub-plots consisted of the cotton-cowpea (C/CP) and sunflower-cowpea (S/CP) crop rotation. The use of gypsum and organic matter... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Salinity; Sodicity; Gossypium hirsutum; Helianthus annuus; Vigna unguiculata. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000500006 |
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| Silva,Jaqueline A. da; Rezende,Maiara K. A.; Flumignan,Danilton L.. |
| ABSTRACT Plant yield is strongly influenced by the amount of water used by it. In this sense, yield response factor (Ky) allows evaluating the decrease in yield as a function of the evapotranspiration that occurs, which may be an important tool for harvest forecasting. Therefore, this study aimed to determine Ky for winter corn crop grown in the region of Dourados, MS, Brazil. The yield function analysis based on the water factor, which requires actual (Ya) and maximum (Ym) yield data, as well as actual (ETa) and maximum (ETm) evapotranspiration, was used to adjust Ky. Ym was assumed to be 8,820 kg ha−1, while Ya was obtained for each season from the database SIDRA from IBGE. ETm and ETa were estimated by sequential daily water balance, considering four... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Irrigation; Water deficit; Evapotranspiration; Zea mays. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000500573 |
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| TAVARES,CÁSSIO J.; SOUSA,MORGANA S.; ARAÚJO,ALANA C. F.; JAKELAITIS,ADRIANO; RESENDE,OSVALDO. |
| ABSTRACT Selection and dosage of desiccating herbicides may bring benefits to bean harvesting and its seed quality. This study aimed to assess yield, apparent specific mass and coloration of azuki bean seeds after pre-harvesting desiccation with different herbicides and doses and subsequent storing. In a first trial, we tested paraquat 400 (g ai ha-1), ammonium glufosinate (400 g ai ha-1), glyphosate (720 g ai ha-1), flumioxazin (30 g ai ha-1) and control. In second and third trials, we tested various doses of saflufenacil (0, 50, 75, 100, 150 and 200 g ai ha-1) and flumioxazin (0, 20, 25, 30, 35 and 40 g ai ha-1). All treatments were divided into plots and the dates of evaluation (at harvest and six months after harvest) into subplots with four... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Desiccating herbicides; Post-harvest; Vigna angularis Willd. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000500858 |
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| Oliveira,Lutércia M. F. de; Yanagi Junior,Tadayuki; Ferreira,Elizabeth; Carvalho,Luiz G. de; Silva,Mariano P. da. |
| O objetivo deste trabalho foi avaliar as condições de clima da região Sudeste do Brasil, por meio do índice de temperatura e umidade (ITU), e apresentar o zoneamento bioclimático relacionado ao conforto térmico animal e humano. Os valores de ITU foram estimados a partir de dados de temperatura e umidade relativa do ar para o período de 1980 a 2000. Quatro intervalos de ITU foram usados para classificar o desempenho humano (ITU < 74: conforto; 74 < ITU < 79: quente; 79 < ITU < 84: muito quente, e ITU > 84: extremamente quente), e dois intervalos para classificar a produção animal (79 < ITU < 84: perigoso e ITU > 84: emergência). Os resultados mostraram maior risco de desconforto térmico no período de outubro a abril, comparado ao... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ambiente térmico; Produção animal; Rendimento humano. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162006000300020 |
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| Turco,Sílvia H. N.; Silva,Thieres G. F. da; Santos,Luiz F. C. dos; Ribeiro,Paulo H. B.; Araújo,Gherman G. L. de; Holanda Junior,Evandro V.; Aguiar,Mônica A.. |
| Foram utilizados dados meteorológicos médios diários de 437 estações meteorológicas distribuídas por todo o Estado da Bahia para realizar o zoneamento bioclimático de vacas leiteiras e o declínio da produção de leite para vacas com nível de produção de 10 e 25 kg dia-1, nas condições térmicas desse Estado. As variáveis consideradas foram a temperatura (Ta) e a umidade relativa do ar (UR) que foram utilizadas no cálculo do índice de temperatura e umidade (ITU). Estimou-se o declínio da produção de leite (DPL) em função do ITU e do nível de produção (NP). Com os valores de ITU e DPL, foram traçadas as isolinhas dessas duas variáveis para a Bahia por meio do programa SURFER 7.0. Observou-se que, mesmo para os meses com... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Produção de leite; Índice de temperatura e umidade; Conforto térmico. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162006000100003 |
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| Massari,Juliana M.; Moura,Daniella J. de; Curi,Thayla M. R. de C.; Vercellino,Rimena do A.; Medeiros,Brenda B. L.. |
| ABSTRACT Using geostatistics, this study aimed to analyze environmental conditions for wean-to-finish swines at 3 pm, during the most sensitive phases to thermal stress (growth/ finishing and finishing). To this end, dry-bulb temperature, relative humidity, air speed, ammonia and carbon dioxide concentrations were measured at 81 equidistant points within the barn. Descriptive statistics was used to classify attribute variability, generating mean, median, variation coefficient, asymmetry and kurtosis, through the normality of Kolmogorov-Smirnov (KS). For that, it was used Minitab 15 software. Moreover, semivariograms were used to assess spatial dependence using the GS+ software, and through Surfer, spatial distribution maps were designed. Dry-bulb... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ambience; Welfare; Geostatistics; Pig farming. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000500739 |
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| Registros recuperados: 1.831 | |
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