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AN EVALUATION OF THE THERMAL AND LUMINOUS ENVIRONMENT OF LAYING HEN AVIARIES EQUIPPED WITH LIGHT-EMITTING DIODE AND COMPACT FLUORESCENT LAMPS AND THEIR EFFECTS ON PRODUCTION AND EGG QUALITY REA
Ribeiro,Priscilla A. P.; Yanagi Junior,Tadayuki; Lima,Renato R. de; Oliveira,Daniela D. de; Abreu,Lucas H. P..
ABSTRACT The thermal and luminous conditions in aviaries affect the production and quality of eggs. Thus, the aim of the present study was to evaluate the thermal and luminous environment of commercial laying hen aviaries equipped with compact fluorescent (CF) and light-emitting diode (LED) lamps and their influence on egg production and quality. The study was carried out in two commercial laying hen facilities with similar construction features and management. The first facility was illuminated with CF lamps and the second with LED lamps. The thermal environment was assessed via air temperature, air relative humidity, and enthalpy. The evaluated lamps provided a similar thermal environment in both facilities. The aviary equipped with LED lamps showed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Thermal environment; Artificial lighting; Laying hens.
Ano: 2021 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162021000100001
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ARTIFICIAL NEURAL NETWORKS FOR PREDICTION OF PHYSIOLOGICAL AND PRODUCTIVE VARIABLES OF BROILERS REA
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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CLOACAL AND SURFACE TEMPERATURES OF BROILERS SUBJECT TO THERMAL STRESS REA
Abreu,Lucas H. P.; Yanagi Junior,Tadayuki; Campos,Alessandro T.; Bahuti,Marcelo; Fassani,Édison J..
ABSTRACT: The cloacal and surface temperatures are important physiological parameters to quantify the thermal comfort of animals, its variations may occur as a function of thermal variables. In this context, the goal of the present study was to evaluate the cloacal (tclo) and surface (tsur) temperatures of Cobb 500® broilers, in the second week of life, subjected to different air dry-bulb temperature (24, 27, 30 and 33 °C) and stress durations (1, 2, 3 and 4 days). The experiment was carried out in four climate-controlled wind tunnels. Air relative humidity and air velocity were set at 60% and 0.2 m s-1, respectively. The tclo and tsur were measured daily through digital thermometer and thermographic camera, respectively. Analysis of variance and Scott...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Animal environment; Aviculture; Thermal comfort; Thermographic image; Physiologic parameters.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000500877
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Comportamento de frangos de corte submetidos a diferentes ambientes térmicos REA
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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ESTIMATION OF RESPIRATORY FREQUENCY AND RECTAL TEMPERATURE ON PIGS IN HEAT STRESS BY FUZZY LOGIC REA
Oliveira,Rodrigo F. de; Ferreira,Rony A.; Abreu,Lucas H. P.; Yanagi Júnior,Tadayuki; Lourençoni,Dian.
ABSTRACT Physiological parameters such as respiratory frequency and rectal temperature stand out as indicators for heat stress in pigs, however, requiring time and labor for measurements. The possibility of using infrared thermography associated with prediction systems of these physiological variables can help in decision making, allowing greater welfare and productivity of the animals. With this objective, an experiment was carried out with growing pigs submitted to acute and chronic heat stress, working with a thermoneutrality temperature (22° C) and heat stress (34° C). The results were used for the development of a fuzzy model using as input variables: air dry bulb temperature (°C), average surface temperature (°C) and, as output variables: respiratory...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Animal environment; Fuzzy set theory; Pig breeding farm; Infrared thermography.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000400457
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FUZZY MODEL FOR PREDICTING CLOACAL TEMPERATURE OF BROILER CHICKENS UNDER THERMAL STRESS REA
Abreu,Lucas H. P.; Yanagi Junior,Tadayuki; Campos,Alessandro T.; Lourençoni,Dian; Bahuti,Marcelo.
ABSTRACT Broiler chickens submitted to different intensities and durations of thermal stress are subject to variation in cloacal temperature and, consequently, to a decrease in performance. Given the complexity of these interactions, artificial intelligence is a useful methodology for decision-making. Thus, this study aimed to assess and predict, by means of a fuzzy model, the cloacal temperature of broiler chickens submitted to thermal stress in the second week of life, with varying durations and intensities, in climatized wind tunnels. Mamdani's inference and defuzzification methods by means of the center of gravity were used. One hundred and twenty rules were elaborated. The developed fuzzy model was used to predict the cloacal temperature of broiler...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Physiological response; Thermal environment; Mathematical modeling; Fuzzy logic.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000100018
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Fuzzy modeling of broiler performance, raised from 1 to 21 days, subject to heat stress REA
Abreu,Lucas H. P.; Yanagi Junior,Tadayuki; Fassani,Édison J.; Campos,Alessandro T.; Lourençoni,Dian.
ABSTRACT Given the need to obtain systems to better control broiler production environment, we performed an experiment with broilers from 1 to 21 days, which were submitted to different intensities and air temperature durations in conditioned wind tunnels and the results were used for validation of afuzzy model. The model was developed using as input variables: duration of heat stress (days), dry bulb air temperature (°C) and as output variable: feed intake (g) weight gain (g) and feed conversion (g.g-1). The inference method used was Mamdani, 20 rules have been prepared and the defuzzification technique used was the Center of Gravity. A satisfactory efficiency in determining productive responses is evidenced in the results obtained in the model...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fuzzy logic; Animal environment; Poultry.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000600967
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Modelagem Fuzzy aplicada na avaliação do desempenho de frangos de corte AGRIAMBI
Schiassi,Leonardo; Yanagi Júnior,Tadayuki; Reis,Gregory M.; Abreu,Lucas H. P.; Campos,Alessandro T.; Castro,Jaqueline de O..
Com o objetivo de analisar o efeito da idade e a temperatura do ar nas respostas produtivas de frangos de corte, conduziu-se um experimento com animais criados de 1 a 21 dias de idade em túneis de vento climatizados cujos resultados observados foram utilizados no desenvolvimento e teste de um modelo matemático Fuzzy capaz de quantificar esta relação. O modelo desenvolvido tem, como variáveis de entrada: temperatura da primeira semana de vida (ºC), temperatura da segunda semana de vida (ºC) e a idade das aves (semanas), sendo que as variáveis de saída consideradas foram consumo de ração (CR, g), ganho de peso (GP, g) e conversão alimentar (CA, g g-1). O método de inferência de Mandani foi utilizado para elaboração de 36 regras e na defuzificação foi...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ambiência animal; Modelagem matemática; Sistemas especialistas.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015000200140
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PERFORMANCE OF FUZZY INFERENCE SYSTEMS TO PREDICT THE SURFACE TEMPERATURE OF BROILER CHICKENS REA
Bahuti,Marcelo; Abreu,Lucas H. P.; Yanagi Junior,Tadayuki; Lima,Renato R. de; Campos,Alessandro T..
ABSTRACT This study aimed to compare fuzzy systems with different configurations to predict the surface temperature (ts) of broiler chickens subjected to different intensities and durations of thermal challenges in the second week of life. Data on the ts of broiler chickens aged 8 to 11 days were acquired by infrared thermography and subjected to combinations of four dry-bulb temperatures (tdb) (24, 27, 30, and 33 °C) and four durations of thermal challenges (DTC) (1, 2, 3, or 4 days). The input variables of the fuzzy systems were tdb and DTC, and the output variable was ts. The Mamdani inference method involving five defuzzification methods [center of gravity (centroid), bisector of the area (bisector), largest of maximum (lom), middle of maximum (mom),...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pertinence functions; Fuzzy logic; Defuzzification methods; Fuzzy inference methods; Chicks; Infrared thermography.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000600813
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Procedimento fuzzy aplicado à avaliação da insalubridade em atividades agrícolas REA
Yanagi Junior,Tadayuki; Schiassi,Leonardo; Abreu,Lucas H. P.; Barbosa,Jackson A.; Campos,Alessandro T..
Diante do alto grau de mecanização a que as atividades agrícolas estão sendo submetidas, objetivou-se, com esta pesquisa, desenvolver um modelo fuzzy capaz de avaliar e classificar o nível de insalubridade em diversos ambientes de trabalho. O modelo desenvolvido tem como variáveis de entrada: o índice de bulbo úmido e temperatura de globo (IBUTG, °C), o nível de ruído (dBA), a taxa de metabolismo (W m-2) e o tempo de descanso (%) e, como variável de saída, o índice de bem-estar humano (IBEH). O método de inferência utilizado foi o de Mandani e, na defuzificacão, utilizou-se o método do centro de gravidade. O sistema de regras foi desenvolvido com base nas combinações das variáveis de entrada. Foram definidas 400 regras com pesos iguais a 1, sendo que, na...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bem-estar humano; Modelagem matemática; Sistema especialista.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000300002
Registros recuperados: 10
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