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| Abreu,Lucas H. P.; Yanagi Junior,Tadayuki; Bahuti,Marcelo; Hernández-Julio,Yamid F.; Ferraz,Patrícia F. P.. |
| ABSTRACT Due to a number of factors involving the thermal environment of a broiler cutting installation and its interaction with the physiological and productive responses of birds, artificial intelligence has been shown to be an interesting methodology to assist in the decision-making process. For this reason, the main aim of this work was to develop an artificial neural network (ANN) to predict feed conversion (FC), water consumption (Cwater), and cloacal temperature (tclo) of broilers submitted to different air dry-bulb temperatures (24, 27, 30, and 33°C) and durations (1, 2, 3, and 4 days) of thermal stress in the second week of the production cycle. Relative humidity and wind speed were fixed at 60% and 0.2 ms−1, respectively. The experimental data... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Poultry; Thermal stress; Artificial intelligence. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000100001 |
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| Gonçalves,Luana M.; Ferraz,Gabriel A. e S.; Oliveira,Marcelo S. de; Barbosa,Brenon D. S.; Silva,Carlos J. da; Ferraz,Patrícia F. P.. |
| ABSTRACT Noise is one of the harmful and stressful physical agents present in the workplace. Research performed with geostatistics to adjust the semivariogram of tractor noise were performed using the Gaussian and spherical model. In this way, the aim was to map the spatial variability of the noise emitted by a power tiller through the sine wave model, besides testing other fitting methods, in order to identify health zones for the workers. The experiment was performed with an agricultural power tiller (10.3 kW) placed in a working regime (1500 rpm), coupled to a brushcutter, and a digital sound level meter to collect noises in points distributed along a regular grid sampling of 2.0 × 2.0 m around the tractor. The spatial dependence of noise was analyzed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acoustic comfort; Agricultural mechanization; Spatial variability; Ergonomics; Sine wave model. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000300223 |
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| Schiassi,Leonardo; Yanagi Junior,Tadayuki; Ferraz,Patrícia F. P.; Campos,Alessandro T.; Silva,Guilherme R. e; Abreu,Lucas H. P.. |
| É um desafio manter o ambiente térmico, e como as aves alteram seu comportamento em resposta a este ambiente, entender o comportamento dos animais ajuda neste controle. Neste contexto, objetivou-se, com o presente trabalho, avaliar o comportamento de frangos de corte, durante as duas primeiras semanas de vida, submetidos a diversas variações de temperatura do ar em câmaras climáticas. Os animais foram filmados por câmeras de vídeo, possibilitando o monitoramento das aves no estudo dos comportamentos característicos de agrupamento, presença no bebedouro, presença no comedouro e presença em áreas intermediárias. Os resultados mostraram que, em condições de estresse térmico por frio, as aves apresentaram tendência de permanecer maior parte do tempo agrupadas,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ambiência animal; Bioclimatologia; Conforto térmico; Avicultura. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000300390 |
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| Carvalho,Luis C. C.; Silva,Fabio M. da; Ferraz,Gabriel A. e S.; Stracieri,Juliana; Ferraz,Patrícia F. P.; Ambrosano,Lucas. |
| ABSTRACT To make the coffee activity competitive, some farmers use precision coffee farming. Thus, it is possible to create thematic maps that guide management practices for regions where there are limitation for the plant development. The objective of this study was to identify the spatial dependence of coffee crop yield, in 2012 and 2013. The experimental area is located in a Haplustox in Três Pontas, Minas Gerais. One hundred sampling points were georeferenced for the collection of yield data through manual harvest. The difference of yield between crop seasons was also evaluated. Data were processed using geostatistical analysis. It was possible to identify and characterize the spatial dependence of all variables, as well as to create contour maps.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea arabica L.; Spatial variability; Biennuality; Maps; Precision agriculture. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000600410 |
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| Ferraz,Patrícia F. P.; Ferraz,Gabriel A. e S.; Damasceno,Flavio A.; Moura,Raquel S. de; Silva,Maria A. J. G.; Rodrigues,Rodrigo de L.. |
| ABSTRACT The profitability of a rabbit farming system must consider the rabbit’s breed, nutrition, management, sanitation and mainly the thermal environment that the animal will be exposed during the productive period. The aim of this study was to compare the internal thermal environment of two rabbit houses, one with ridge vent and the other without ridge vent. Geostatistical technique was used to evaluate the spatial variability of enthalpy. Data were collected at 48 points in each house during eight days at the end of summer season 2016. Measurements of dry-bulb temperature, relative humidity and wind speed were made for 1 min at three times a day at 7:00 a.m., 12:00 a.m. and 5:00 p.m. In addition, the enthalpy was calculated and a data analysis was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ambience; Welfare; Rabbit breeding; Geostatistics; Mapping. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000200126 |
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