Consulta: creatorFacets:"Ferraz,Patrícia F. P."
Registros recuperados: 7
Data/hora: 13/06/2024 02:50:49

Comportamento de frangos de corte submetidos a diferentes ambientes térmicos
Provedor de dados: 70
Autores: 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

ARTIFICIAL NEURAL NETWORKS FOR PREDICTION OF PHYSIOLOGICAL AND PRODUCTIVE VARIABLES OF BROILERS
Provedor de dados: 70
Autores: 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

Genetic fuzzy system for prediction of respiratory rate of chicks subject to thermal challenges
Provedor de dados: 91
Autores: Ferraz,Patrícia F. P.; Yanagi Junior,Tadayuki; Hernandez-Julio,Yamid F.; Ferraz,Gabriel A. e S.; Silva,Maria A. J. G.; Damasceno,Flavio A.
ABSTRACT The aim of this study was to estimate and compare the respiratory rate (breath min-1) of broiler chicks subjected to different heat intensities and exposure durations for the first week of life using a Fuzzy Inference System and a Genetic Fuzzy Rule Based System. The experiment was conducted in four environmentally controlled wind tunnels and using 210 chicks. The Fuzzy Inference System was structured based on two input variables: duration of thermal exposure (in days) and dry bulb temperature (°C), and the output variable was respiratory rate. The Genetic Fuzzy Rule Based System set the parameters of input and output variables of the Fuzzy Inference System model in order to increase the prediction accuracy of the respiratory rate values. The two...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler; Computational intelligence; Physiological responses.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000600412

Spatial variability of enthalpy in rabbit house with and without ridge vent
Provedor de dados: 91
Autores: 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

Spatial variability of enthalpy in broiler house during the heating phase
Provedor de dados: 91
Autores: Ferraz,Patrícia F. P.; Yanagi Junior,Tadayuki; Ferraz,Gabriel A. e S.; Schiassi,Leonardo; Campos,Alessandro T.
ABSTRACT The thermal environment inside a broiler house has a great influence on animal welfare and productivity during the production phase. Enthalpy is a thermodynamic property that has been proposed to evaluate the internal broiler house environment, for being an indicator of the amount of energy contained in a mixture of water vapor and dry air. Therefore, this study aimed to characterize the spatial variability of enthalpy in a broiler house during the heating phase using geostatistics. The experiment was conducted in the spring season, in a commercial broiler house with heating system consisting of two furnaces that heat the air indirectly, in the first 14 days of the birds' life. It was possible to characterize enthalpy variability using...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Poultry farming; Thermal comfort; Geostatistics; Kriging; Chicks.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000600570

Characterization of noise emitted by a power tiller through geostatistics
Provedor de dados: 91
Autores: 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

Geostatistical analysis of Arabic coffee yield in two crop seasons
Provedor de dados: 91
Autores: 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