Tadayuki Yanagi Junior

Tadayuki Yanagi Junior
Universidade Federal de Lavras (UFLA) | UFLA · Departamento de Engenharia

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145
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Publications

Publications (145)
Article
Full-text available
The aim of this paper was to analyze, using computational fluid dynamics (CFD), a heating system in a commercial broiler house. Data were collected in a broiler house located in the western mesoregion of Minas Gerais, Brazil. The data were collected at 10 a.m. on the seventh day of chicks’ life in 16 points inside the house. A tetrahedral mesh was...
Article
Full-text available
The objective of this study was to develop a heat balance in laying hens and analyze their performance, besides simulating the partition between sensible and latent heats. The 28-d old Hy-line laying hens were subjected to a factorial combination of five levels of air temperature (20, 24, 28, 32, and 36 • C), two levels of air relative humidity (40...
Conference Paper
Full-text available
Concrete is the main material used in the construction industry and its main property is the axial compressive strength. Usually the prediction of compressive strength is restricted to limited empirical equations and / or laboratory dosages. The objective of this study is to develop fuzzy systems capable of obtaining the axial compressive strength...
Article
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ABSTRACT This study proposes a fuzzy logic model capable of predicting the ocular temperature (OT) of beef cattle by means of infrared thermography. The goal of this study is to establish a methodology for making decisions related to animal welfare. The experiment was carried out at a commercial beef production farm, located in the south of Minas G...
Article
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The objective of this study was to characterize the thermal environment and evaluate the behavior of finishing pigs housed in deep bedding and conventional systems. The work was carried out in the Department of Animal Science of the Federal Institute of Education, Science and Technology of Southeast Minas Gerais, Rio Pomba campus. Three pens were u...
Article
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Considering the challenges faced by poultry farming, this study aimed to develop a neuro-fuzzy model to predict eyeball and crest temperatures of egg-laying hens based on environmental conditions (dry bulb temperature and relative humidity). To develop the models and simulations, Matlab’s Fuzzy Toolbox® (Anfisedit) was used. Different configuration...
Article
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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...
Article
O ambiente afeta o desempenho produtivo dos animais quando expostos a condições de estresse térmico, comprometendo o bem-estar, o crescimento e a produção. Diante disso, essa revisão bibliográfica foi elaborada com o objetivo de abordar a influência do microclima do coelhário sobre as respostas fisiológicas, comportamentais e desempenho produtivo d...
Conference Paper
Full-text available
Concrete is one of the most widely used building materials, being composed of different components with different properties, which makes the task of dosing and strength determination complex. Artificial Neural Networks is a tool that has the ability to generalize and learn from previous experiences that are provided by a previously built database....
Article
Controlling environmental conditions inside laying hens facilities systems and their effects on physiology and performance is essential in defining management strategies to alleviate the adverse effects of thermal stress in laying hens. Thus, we estimated thermoneutral zones for laying hens exposed to different heat-challenging conditions based on...
Article
Full-text available
Concrete is one of the most widely used building materials, being composed of different components with different properties, which makes the task of dosing and strength determination complex. Artificial Neural Networks is a tool that has the ability to generalize and learn from previous experiences that are provided by a previously built database....
Article
Use of artificial neural networks to predict concrete compression strength Uso de redes neurais artificiais na predição da resistência à compressão do concreto ABSTRACT Concrete is one of the most widely used building materials, being composed of different components with different properties, which makes the task of dosing and strength determinati...
Article
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Although dry bulb temperature (T) is the environmental variable most commonly used to classify thermal comfort in pigs, environmental assessment ratios provide more accurate information. The objective of this study was to correlate the sound pressure levels (SPL) produced by piglet vocalization with the thermal environment observed during the nurse...
Article
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The performance of New Zealand White rabbits (NZW) is directly associated with to ambiance-related factors because they present high sensitivity to high-temperature conditions. The objective of the present work was to use the Fuzzy C-Means (FCM) clustering algorithm for pattern recognition in daily feed consumption (CDR) of NZW rabbits exposed to d...
Chapter
Full-text available
Nowadays, laying poultry is technically developed, and most farms tend to automate their production processes. In this context, the quality of production is one of the main interests of egg producers and consumers, since it is directly related to factors such as hygiene, health and, mainly, the health and welfare of the animals. In this context, th...
Article
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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 ar...
Article
Behaviour and physiological responses (e.g. respiratory rate and cloacal temperature) could be an indication of the thermal comfort or discomfort of broilers chicks. This study aimed to estimate the cloacal temperature (CT) of chicks in response to different intensities and durations of thermal exposure during the first week of life using a fuzzy i...
Article
Full-text available
The objective of the present study was to establish the bioclimatic zoning by the temperature and humidity index (THI), considering a historical period and a future scenario, in order to represent the thermal environment for broiler breeding in the State of Minas Gerais. A historical series (1976 - 2014) of THI minimum, average and maximum calculat...
Article
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The performance of broilers submitted to thermal discomfort in the first weeks of life may be impaired, since the thermoregulatory system of the bird is not fully developed. The objective of this study was to analyze the effects of different thermal challenges on the performance of broilers. Two hundred and forty broilers were submitted to differen...
Conference Paper
Full-text available
Concrete is one of the most widely used building materials, being composed of different components with different properties, which makes the task of dosing and strength determination complex. Artificial Neural Networks is a tool that has the ability to generalize and learn from previous experiences that are provided by a previously built database....
Conference Paper
Full-text available
RESUMO-O ambiente do sistema de criação é um dos principais responsáveis pelas perdas na produção, pois quando se ultrapassa os limites de conforto, a energia usada para a produção é dispendida nos processos termorregulatórios e essa compensação faz parte dos mecanismos de homeostase dos organismos dos animais conhecidos como homeotérmicos. Diante...
Conference Paper
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Resumo-Sistemas de resfriamento evaporativo envolvem processos de transferência de calor e massa no resfriamento do ar, porém, existe uma incerteza na variável de fração de área molhada da placa. Em vista disso, objetivou-se com esse trabalho, desenvolver um software para análise da fração molhada da placa evaporativa, por meio de modelos matemátic...
Conference Paper
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RESUMO-Os frangos de corte são classificados como animais homeotérmicos e necessitam que o ambiente de produção fique dentro de intervalos de conforto térmico bem definidos. Para tanto, o desenvolvimento de algoritmos (modelos matemáticos) de controle do ambiente, que possam ser embarcados em microcontroladores, torna-se necessário. Diante do expos...
Chapter
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RESUMO-O desempenho dos coelhos da raça Nova Zelândia Branco (NZB) está relacionado diretamente com os fatores ligados a ambiência por apresentarem grande sensibilidade às condições de temperaturas altas. Objetivou-se com o presente trabalho, utilizar o algoritmo de agrupamento Fuzzy C-Means (FCM) para o reconhecimento de padrões em dados de consum...
Chapter
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RESUMO-A cunicultura é uma atividade estratégica devido à facilidade em seu manejo, a alta prolificidade e por se enquadrar bem em sistemas próprios de agricultura familiar, além de produzir uma carne de alto valor biológico. Objetivou-se com o presente estudo, desenvolver um sistema fuzzy Takagi-Sugeno capaz de predizer o consumo diário de ração (...
Article
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The selection of the type of fuzzy systems pertinence curve allows a better representation of the mathematical model and a smaller simulation error. We aimed to study the effect of pertinence curves in fuzzy modeling of broiler performance, created in different production systems. For the development and testing of fuzzy models, three commercial av...
Article
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Dentro de un galpón avícola el ambiente térmico ejerce una gran influencia en el bienestar y la productividad de los animales. De esta manera, el propósito de este trabajo fue predecir la masa corporal de polluelos de 2 a 21 días de vida, sujetos a condiciones de confort y estrés calórico en diferentes intensidades (27; 30; 33 y 36 °C) y períodos d...
Article
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Broiler chickens are homoeothermic animals, i.e., animals capable of maintaining their body temperature within quite narrow limits; therefore, climate change poses a great challenge to poultry. With this in mind, this research aims to evaluate the performance of broilers submitted to different commercial production systems and exposed to different...
Article
Full-text available
Broiler chickens are classified as homoeothermic animals and require a production environment within well-defined thermal comfort intervals. Therefore, the development of algorithms (mathematical models) to control the environment that can be embedded in microcontrollers becomes necessary. Hence, this work aimed to develop a fuzzy model for predict...
Article
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The objective of this work was to evaluate the thermal environment inside conventional cages for laying hens, with and without the use of protective screens. This research was conducted in two conventional cages (open cage), where each cage had half of its area surrounded by high density polyethylene mesh (HDPE) with a diameter of 2.0 cm, and the o...
Article
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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 o...
Article
Full-text available
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 combinatio...
Article
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The objective of this study was to evaluate the sustainability of a broiler chicken production system, with confinement in Darkhouse sheds, by energetic analysis. Energy flows of a complete production cycle, 56 days, were considered, of which the energy inputs and outputs were computed in direct and indirect forms, by estimating the energy coming f...
Article
Full-text available
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 an...
Article
Full-text available
The enthalpy is a thermodynamic property that can be used to evaluate thermal environment for chickens, considering the meteorological variables that most influence the animal’s thermal comfort, the dry-bulb temperature and the relative humidity. The aim was to analyze and compare the spatial variability of enthalpy in a broiler aviary during three...
Article
Full-text available
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...
Article
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Because of the importance of the ambiance in swine facilities, this study aimed to evaluate the air quality, the sound pressure level, and the thermal environment of two distinct swine nursery styles. A completely randomized block design with a split-plot arrangement was used, in which the main plots were composed of the nurseries and the external...
Article
Full-text available
The aim of the present research was to propose a bioclimatic mapping to classify the thermal comfort and discomfort of rural workers within the state of Minas Gerais, considering historical and future scenarios. Monthly historical series (1976-2014) of minimum, mean and maximum temperature-humidity index (THI), determined through the values of air...
Article
Full-text available
The development of chicks under thermoneutral environmental conditions is relevant for the future development of the animal. In the first days of life, the chicks do not have their thermoregulatory system fully developed to adapt to adverse environmental conditions. This way, animals subjected to thermal challenges may not be able to recover until...
Article
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O desenvolvimento do pintinho em condições ambientais de termoneutralidade é relevante para o desenvolvimento futuro do animal. Nos primeiros dias de vida, os pintinhos ainda não possuem sistema termorregulatório totalmente desenvolvido para se adaptarem a condições ambientais adversas, sendo assim, os animais submetidos a desafios térmicos podem n...
Article
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The objective of this work was to evaluate the heat dissipated in broilers during the first two weeks of life and to estimate with infrared thermography the loss of sensible heat from birds. The environmental conditions were pre-established in wind tunnels using the automatic monitoring and control system, where only air temperature values were var...
Article
Full-text available
The main objective of this study was to experimentally validate a mechanistic model for predicting the cooling efficiency (η) of wetted porous plates built with expanded clay. The expanded clay material was physically characterized by specific mass, surface area, and volume. The model was validated with dry bulb temperature (Tdb, °C) and air relati...
Article
Full-text available
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, subj...
Conference Paper
Full-text available
The conditions of the creation environment have a significant effect on the thermal comfort of the broilers, and can be ascertained through the physiological and productive responses of these animals. In order to predict responses such as feed conversion (FC), water consumption (WC) and cloacal temperature (tclo) of broilers, on different intensiti...
Article
Full-text available
The aim of this study was to develop an automated fuzzy controller with microcontroller, consisting of hardware and software for the control and supervision of thermal environment in broiler farms. The study has been conducted in two steps: in the first one it was performed a computer analysis through simulation. In the second step it was performed...
Article
Full-text available
The objective of this work was to evaluate the effect of thermal challenge at different intensities and durations on the production responses of 3 to 21-day-old broiler chickens. Two hundred and ten Cobb chicks were subjected to dry-bulb temperatures (tdb) of 27, 30, 33, or 36°C for the duration of 0, 1, 2, 3, or 4 days from the second day of life...
Article
Full-text available
The spatial illuminance distribution interferes in the commercial production of eggs and electric energy consumption, being considered the second major source of costs in the production chain. Therefore, in this study the objective was to evaluate the spatial distribution of the illuminance level and electric energy consumption in two commercial av...
Conference Paper
Full-text available
The evaluation of surface temperature (tsup) through infrared thermography to determine the thermal comfort of the broilers without interference with the ecological niche of the appraised animal. Thus, this study aimed to analyze the tsup Cobb500 ® of broilers, in the second week of life, submitted to different dry bulb air temperatures (24, 27, 30...
Chapter
Full-text available
The cloacal temperature is an important physiological parameter to quantify the thermal comfort of animals, and that variations may occur because of thermal variables.In this context, the aim of the present research was to evaluate the cloacal temperature (Tclo) Cobb500® of broilers, in the second week of life, submitted to different dry bulb air t...
Article
Full-text available
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. Therefo...
Article
Full-text available
Broiler poultry is highly dependent on artificial lightening. Power consumption costs of artificial lighting systems is the second largest expense related to broiler industry, second only to feed expenses. Therefore, the current study focused to analyze technical and economic feasibility of replacing incandescent lamps already used in aviaries with...
Article
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The aim of the present study was to evaluate hock and knee injuries and locomotor disorders in 36 multiparous Holstein cows confined in a free-stall model system with two types of beds at Embrapa Dairy Cattle in the city of Coronel Pacheco / MG. Rubber composite beds and sand beds were compared and the hock and knee injuries and locomotor disorders...
Article
Full-text available
Diante da necessidade de se obter sistemas, para melhor controlar o ambiente de produção de frangos de corte, foi realizado um experimento com frangos de corte de 1 a 21 dias, os quais foram submetidos a diferentes intensidades e durações de temperaturas do ar em túneis de vento climatizados, e os resultados foram utilizados para a validação de um...
Article
Full-text available
The objective of the present study was to evaluate the behavior of dairy cows confined in free-stall systems. Eighteen Holstein cows were evaluated in this research. The following frequencies were evaluated at 10-min intervals: stall occupancy, corridor occupancy, feeding, moving and being milked. The free-stalls were covered with rubber mattresses...
Article
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Devido às ocorrências dos vírus de influenza aviária (H5N1 e H7N2), estudos relacionados à biosseguridade têm sido intensificados em que uma das soluções discutidas é o uso de tela para cercar a área dos galpões evitando o contato das galinhas poedeiras alojadas com outras aves. Neste contexto objetivou-se, com o presente trabalho, avaliar e compar...
Article
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Thermal environment maintenance is a challenge in poultry industry, since birds change their behavior in response to environmental alterations. Therefore, understanding these changes may help breeders in this issue. In this context, we aimed at evaluating broiler behavior within the first two weeks of life under several chamber air temperature vari...
Article
Full-text available
Background: thermal environment exerts a direct influence on animal performance. Environmental factors, in different circumstances, may affect milk production and fertility of animals, compromising the profitability of the activity. Under heat stress conditions dairy cows reduce feed intake and, consequently, milk production. Sweating and panting a...
Article
Full-text available
The objective of this study was to assess a cattle manure treatment system in aerated tanks in a free-stall confinement system, where the recycled wastewater was used to clean the facilities and the effluent was applied to forage cultivation areas. A batch activated sludge reactor with a prolonged intermittent aeration system scaled to a 24- day hy...
Article
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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 relaçã...
Article
Full-text available
Esta pesquisa foi realizada com o objetivo de avaliar o reaproveitamento de embalagens Tetra Pak-® junto a telhas de fibrocimento e o uso de telhas recicladas à base de embalagens Tetra Pak-® no conforto térmico em modelos físicos em escala reduzida de instalações rurais. Para testar os diferentes materiais de co