|
|
|
| Registros recuperados: 42 | |
|
|
| Marin,Fábio Ricardo; Pandorfi,Héliton; Sentelhas,Paulo César; Camargo,Marcelo Bento Paes de; Hernandez,Fernando Braz Tangerino. |
| O objetivo deste trabalho foi estimar a perda de produtividade potencial do sorgo em 36 épocas de semeadura, para quatro localidades do Estado de São Paulo: Manduri, Piracicaba, Ribeirão Preto e Ilha Solteira. As estimativas basearam-se nas chances de atendimento das exigências hídricas da cultura, utilizando-se do método de Doorenbos e Kassam/FAO, para estimativa da produtividade potencial e real. Foi necessário acrescentar um fator de correção com base na temperatura do ar para a obtenção de estimativas coerentes com o modelo. Utilizaram-se séries de dados climatológicos entre 10 e 40 anos. Foi possível identificar épocas de semeadura com menores riscos para o cultivo do sorgo e as chances de perda para cada época do ano. Em Manduri, Piracicaba, Ilha... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sorghum bicolor; Balanço hídrico; Época de semeadura; Risco climático. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052006000100020 |
| |
|
|
| Almeida,Gledson Luiz Pontes de; Pandorfi,Héliton; Baptista,Fátima; Guiselini,Cristiane; Ferreira,Marcelo de Andrade; Cruz,Vasco Fitas. |
| ABSTRACT: This research aimed to assess Girolando calves’ concentrate intake and performance when placed in shelters with distinct roofing materials and programs of supplementary lighting during the milk-feeding stage. In order to so, we used a completely randomized design with a 3×3 factorial arrangement, with three replications. Females Girolando calves (n=27) were assigned in individual shelters at random with 3 different roofing materials (fiber cement tile, recycled tile and thatched roofs) and subjected to three lighting programs (12, 16 and 20 hours). No interaction was observed between roofing material and lighting programs, whilst no significant effect (P>0.05) was observed among the roofing materials. The supplementary lighting, by providing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal performance; Dairy cattle; Light duration; Weight gain. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000900651 |
| |
|
|
| Pandorfi,Héliton; Silva,Iran J. O.; Sevegnani,Kelly B.; Caro,Ivan W.. |
| Nas últimas décadas, a produção de suínos, pressionada por uma crescente demanda por alimentos, tem-se caracterizado pela maior concentração de animais em grandes unidades de produção, dificultando o registro dos dados individuais. Os sistemas automáticos de identificação eletrônica podem auxiliar a detecção de doenças, a avaliação de respostas fisiológicas, o controle de ingestão de alimentos, a atividade física e ainda o impacto ambiental causado pelo sistema de produção, promovendo melhor controle da propriedade. Transponders injetáveis, brincos eletrônicos e o monitoramento por meio da análise de imagem estão sendo utilizados no processo de identificação. O objetivo desta pesquisa foi avaliar os diferentes locais de implante subcutâneo de microchips em... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Análise de imagem; Identificação eletrônica; Zootecnia de precisão. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162005000100001 |
| |
|
|
| Nazareno,Aérica C; Pandorfi,Héliton; Guiselini,Cristiane; Vigoderis,Ricardo B; Pedrosa,Elvira M. R. |
| Esta pesquisa foi conduzida com o objetivo de avaliar diferentes sistemas de criação para frangos de corte, caracterizando o ambiente térmico, os parâmetros fisiológicos e o comportamento animal. O experimento foi realizado no decorrer de um ciclo produtivo de 42 dias, no município de Carpina, Estado de Pernambuco, na Estação Experimental de Pequenos Animais da Universidade Federal Rural de Pernambuco (UFRPE). A pesquisa foi desenvolvida em um módulo de produção dividido em 15 boxes, com 10 aves por Box, e densidade de 10 aves por m², totalizando 150 aves, submetidas a três sistemas de criação: semiconfinado com 3 m² por ave de área de piquete (SC 3), semiconfinado com 6 m² por ave de área de piquete (SC 6) e confinamento total (CONF). O delineamento... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avicultura; Conforto térmico; Comportamento; Instalações agrícolas. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162011000100002 |
| |
|
|
| Silva,Irenilson M. da; Pandorfi,Héliton; Vasconcelos,Ângelo J. S. de; Laurenti,Renato; Guiselini,Cristiane. |
| Due to the importance of the environment on animal production and thus environmental control, the study aims to build a system for monitoring and control the meteorological variables, temperature and relative humidity, low cost, which can be associated with an evaporative cooling system (ECS). The system development included all the stages of assembly, test and laboratory calibration, and later the validation of the equipment carried in the field. The validation step showed results which allowed concluding that the system can be safely used in the monitoring of these variables. The controller was efficient in management of the microclimate in the waiting corral and allowed the maintenance of the air temperature within the comfort range for dairy cattle in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dairy cattle; Thermal comfort; Instrumentation. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000100001 |
| |
|
|
| Silva,Roberto C. da; Cordeiro Júnior,José J. F.; Pandorfi,Héliton; Vigoderis,Ricardo B.; Guiselini,Cristiane. |
| ABSTRACT Computational simulations of mass and energy flow help in implementing alternative cooling systems in protected environments. The aim of this study was to model and simulate the interaction between external and internal environments of a protected environment by means of computational fluid dynamics (CFD) techniques and validate micrometeorological variables for subsequent comparison between natural and indirect ventilation by ground heat exchangers. At the first phase, the micrometeorological variables global solar radiation (Qg), air temperature (Tair), and air relative humidity (RH) were monitored. The second phase consisted of the numerical modeling of finite volumes, with validation through recorded data, as well as simulation and comparison... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Numerical simulation; Micrometeorology; Protected cultivation; Finite elements. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000300414 |
| |
|
|
| Silva,Irenilson M. da; Pandorfi,Héliton; Almeida,Gledson L. P.; Guiselini,Cristiane; Henrique,Hugo M.. |
| The aim of this paper was to evaluate the automated acclimatization effects during pre-milking of cows on thermal conditioning, physiology, milk production and cost-benefit of the automated adiabatic evaporative cooling system (AECS). The treatments 20; 30; 40 min and control consisted of exposure time of pre-milking cows to the automated AECS. Sixteen cows were used with an average daily milk yield of 19 kg, distributed in a 4 x 4 Latin square design. The Tukey's test (P<0.05) was used to compare the means. The environmental variables, dry bulb temperature (DBT, ºC) and relative humidity (RH, %), were recorded every minute, which allowed the determination of the system efficiency through the Temperature and Humidity Index (THI). The respiratory rate... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Thermal comfort; Automation; Dairy cattle; Evaporative cooling system. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162011000500002 |
| |
|
|
| Bezerra,Alan C.; Pandorfi,Héliton; Gama,Rafael M.; Carvalho,Francisco F. R. de; Guiselini,Cristiane. |
| ABSTRACT: The goat and sheep meat producer chain has developed in last years, thus, it is imperative to organize and structure the supply chain and to adopt reliable policies for products' traceability, as a tool to achieve these requirements. The study aimed to make a management program with a traceability model for goat and sheep meat production, with emphasis on ensuring product origin and management practices' transparency at the animal production unit. For this purpose, it was made a reference model in order to emit an origin certificate which, in turn, provides specific information concerning the final product from each unit. Secondly, the program was developed using Hipertext Preprocessor (PHP) technology and as for the Database Management System,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Goat and sheep meat production; Traceability; Food safety; Management system. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000501062 |
| |
|
|
| Omar,Aline; Vigoderis,Ricardo; Pandorfi,Héliton; Moura,Geber; Guiselini,Cristiane. |
| ABSTRACT Green roof is a technology that consists of the use of soil and vegetation installed in the roof of buildings, being a great solution to combat heat islands. Thus, this study aimed to compare micrometeorological changes and their effect on the energy balance of non-vegetated (slab) and vegetated building roofs by means of a simulation model calculated as a function of the reference evapotranspiration (ETo), determined by the Penman-Monteith method. This research was developed between February 1 and September 30, 2016, in the Charles Darwin Building's Parking Garage, Rio Ave Empreendimentos, Recife, PE, Brazil. For this, a weather station was installed on the external building slab. On the slab, sensible, latent, and soil heat fluxes corresponded... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Radiation balance; Urban climate; Energy fluxes. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000300334 |
| |
|
| |
|
|
| Almeida Neto,Luiz A.; Pandorfi,Héliton; Moraes,Alex S.; Guiselini,Cristiane; C. Júnior,José J. Florentino. |
| ABSTRACT Sugarcane is considered one of the main alternatives for biofuel production and an important product of Brazilian agriculture, so it is indispensable to adopt new techniques for its cultivation and management. Thus, the present study aimed to evaluate the effect of the quality of supplemental lighting, based on light-emitting diode (LED), on the acclimation of pre-sprouted sugarcane seedlings in a protected environment. The experimental design was completely randomized, consisting of three supplemental LED lighting systems, with light proportions of 90% red + 10% blue (R:B 90/10), 80% red + 20% blue (R:B 80/20) and 70% red + 30% blue (R:B 70/30), and a control, with natural solar radiation, with 5 replicates. Multivariate principal component... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Principal components; Light-emitting diode; Supplemental lighting; Solar radiation. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000400410 |
| |
|
|
| Almeida,Gledson L. P. de; Pandorfi,Héliton; Baptista,Fátima; Guiselini,Cristiane; Barnabé,Janice M. C. |
| ABSTRACT The objective of this research was to evaluate the thermal efficiency of roofs used on individual shelters during milk-feeding stage of Girolando calves. The research was conducted at a farm located in a dry region of Pernambuco state, Brazil. The experimental design was completely randomized, with 27 Holstein × Gir dairy crossbred calves housed in shelters with three roofing materials (fibre cement tile, recycled tile, and thatched roofs). The recycled tiles and thatched roofs provided reductions of 18.7 and 14.6% in radiant thermal load, respectively. Regardless the roofing material, all animals increased their respiratory rate to maintain thermal equilibrium. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ambience; Dairy cattle; Roofing materials; Thermography. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000100013 |
| |
|
|
| Silva,Tatiana P. N. da; Pandorfi,Héliton; Guiselini,Cristiane; Almeida,Gledson L. P. de; Gomes,Nicoly F.. |
| RESUMO Este estudo foi conduzido com o objetivo de caracterizar a tipologia das instalações para produção de frangos de corte na região Agreste do Estado de Pernambuco, por meio de levantamento das características construtivas de aviários existentes na região. Foram avaliados 68 galpões, em 27 granjas, no período de maio de 2012 a abril de 2013. Com base nos resultados obtidos, 90% das instalações apresentaram orientação leste - oeste, com pequeno afastamento entre galpões (< 30 m). A maioria dos galpões apresentou cobertura com telhas cerâmicas (93%), ausência de forro (93%) e lanternim (100%), pé-direito abaixo do recomendado (90%), beirais menores que 1,25 m (93%) e muretas com altura superior a 0,2 m (40%). Quanto aos equipamentos, observou-se que a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ambiência; Avicultura de corte; Galpões avícolas. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000400789 |
| |
|
|
| Pandorfi,Héliton; Silva,Iran J. O.; Moura,Daniella J.; Sevegnani,Kelly B.. |
| O objetivo geral desta pesquisa foi avaliar o comportamento de leitões em diferentes sistemas de aquecimento por meio da análise de imagem. A pesquisa foi desenvolvida na sala da maternidade, com 80 animais entre o nascimento e o desmame. Os tratamentos adotados para a avaliação da eficiência dos diferentes sistemas de aquecimento do abrigo escamoteador foram: piso térmico, lâmpada incandescente, resistência elétrica e lâmpada de infravermelho. Os dados ambientais foram registrados no ambiente externo, na sala da maternidade e no interior de cada abrigo escamoteador avaliado, ao longo de 19 dias. O delineamento experimental foi em blocos casualizados, com quatro tratamentos e 18 blocos, e as médias foram comparadas pelo teste de Tukey (P < 0,01). Os... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Comportamento animal; Conforto térmico; Suinocultura. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162004000200005 |
| |
|
|
| Cavalcanti,Sávio D. L.; Pandorfi,Héliton; Guiselini,Cristiane; Menezes,Dimas; Neto,Luiz A. de A.. |
| ABSTRACT This research was carried out in Recife, PE, Brazil, and aimed to assess the variation of the surface temperature of trays and substrate in the production of lettuce seedlings and its influence on the final product. Trays consisted of expanded polystyrene, conventional polyvinyl chloride, polyvinyl chloride painted white, and polyvinyl chloride painted gray. Two cultivars (Solaris and Vanda) were used to register crop biometric variables from seedling stage to the final product (46 days). Tray and substrate temperatures were recorded by means of an infrared thermal imager. The experimental design was a completely randomized design in a 4 × 2 factorial scheme with three replications. The conventional polyvinyl chloride tray presented the highest... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ambience; Protected cultivation; Lactuca sativa L.; Seedlings. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000100041 |
| |
|
|
| Rodrigues,Tatiana P. N. da S.; Pandorfi,Héliton; Guiselini,Cristiane; Almeida,Gledson L. P. de; Morrill,Waldirene B. B.. |
| ABSTRACT The objective of this research was to analyze the differences between the food behaviors observed under the factors of production environment, sex and lighting system, using stochastic tools of multivariate analysis. As for the thermal characteristics of the environment, air temperature (T, °C), enthalpy (H, kJ kg-1), and black globe temperature and humidity index (BGTHI) showed high positive correlation with each other and strong negative correlation with relative humidity (RH, %). The “male drinking” behavior was positively associated with thermal characteristics of the environment in the three periods of the day, that is, the act of drinking more water would be a way to alleviate thermal stress. Birds subjected to red LED showed a strong... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal welfare; Broiler farming; Lighting system; Principal component analysis; Thermal comfort. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000300272 |
| |
|
|
| Pandorfi,Héliton; Silva,Iran J. O.; Guiselini,Cristiane; Piedade,Sonia M. S.. |
| O objetivo desta pesquisa consistiu na avaliação do ambiente de alojamento, estimando as condições favoráveis ao melhor desempenho de matrizes gestantes. O experimento foi realizado no período compreendido entre 4-1 e 11-3-2005, em propriedade de produção industrial de suínos, localizada no município de Elias Fausto - SP. A pesquisa foi desenvolvida no setor de gestação, com 24 matrizes primíparas, 12 fêmeas alojadas em baias individuais (T1) e 12 em baias coletivas (T2). O trabalho foi dividido em duas etapas, em função da forma de avaliação dos dados: análise bioclimática e da qualidade do ar, e estimativa dos padrões de conforto térmico ambiental. As variáveis bioclimáticas T (ºC), UR (%), Tgn (ºC) e fisiológicas, taxa respiratória (mov min-1) e... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conforto térmico; Lógica fuzzy; Suinocultura. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162007000100001 |
| |
|
|
| Barnabé,Janice M. C.; Pandorfi,Héliton; Gomes,Nicoly F.; Ameida,Gledson L. P. de; Guiselini,Cristiane. |
| ABSTRACT An adequate thermal environment in pig farming facilities is essential to ensure productivity and animal welfare. The objective of this study was to evaluate the behavior and performance of finishing pigs, subjected to climate-controlled environments and supplementary lighting. Twenty-seven pigs (3/4 Duroc, 1/4 Pietrain) were kept in pens with no climate control, pens with forced ventilation and pens with adiabatic evaporative cooling system, associated with 12 h of natural light, 12 h of natural light + 4 h of artificial light and 12 h of natural light + 6 h of artificial light. The experimental design was completely randomized, in a 3x3 factorial arrangement and the means were compared by Tukey test (p<0.05). Meteorological variables,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal ambience; Behavior; Thermal comfort; Weight gain. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000300294 |
| |
|
| |
|
|
| Rodrigues,Tatiana P. N. da S.; Pandorfi,Héliton; Stosic,Borko; Lucena,Aline C. de; Rodrigues,Diogo F. B.. |
| ABSTRACT The objective of this study was to develop a software based on image processing and computer vision techniques for monitoring the feeding/collective behavior of broilers (Cobb) and validate it based on the results obtained from the visual analysis of an expert. The visual analysis was performed based on the observation and quantification of behaviors in the interval of 10 min at each hour of the day, in the period of 24 hours, totaling 1728 frames/day, for males and females. The software was developed using the Hoshen-Kopelman algorithm, for labeling clusters, which would basically be the grouping of similar pixels. This software is written in the 1999 standard of the C language. After this stage of programming, the Hoshen-Kopelman algorithm... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Broiler farming; Image processing; Lighting system; Computer vision. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000600657 |
| |
| Registros recuperados: 42 | |
|
|
|
