Consulta: subjectFacets:"Precision livestock farming"
Registros recuperados: 6
Data/hora: 12/06/2024 10:42:57

COMPUTATIONAL ANALYSIS OF LOAD VENTILATION IN BROILER TRANSPORT
Provedor de dados: 70
Autores: Pinheiro,Daniel G.; Machado,Nítalo A. F.; Barbosa Filho,José A. D.; Silva,Iran J. O. Da.
ABSTRACT The characterization of ventilation during the transport of broiler chickens is essential for identifying and characterizing the potential problems of a convective heat flow and its effects on the welfare and the health and production conditions of the chickens. The objective of this study was to evaluate the ventilation patterns in two layout models of a live transport load: conventional (LC) and alternative (LA) with spacers placed between the chicken transport crates. Computational fluid dynamics (CFD) simulations and wind tunnel tests were performed using small scale models. The results showed that the use of spacers between crates (LA model) modified the ventilation patterns and increased the wind circulation between crates. However, wind...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Poultry; Animal welfare; CFD simulation; Precision livestock farming.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162021000100009

ELECTRONIC MONITORING SYSTEM FOR MEASURING HEART RATE AND SKIN TEMPERATURE IN SMALL RUMINANTS
Provedor de dados: 70
Autores: Costa,Daniel dos S.; Turco,Silvia H. N.; Ramos,Rodrigo P.; Silva,Flaviane M. F. M.; Freire,Murilo S.
Abstract The electronic monitoring of physiological responses is essential for managing animal production systems considering market demands for animal welfare. The objective of this study was to design, build, and test an electronic monitoring system, with recording and wireless transmission capability, for measuring the heart rate and skin temperature in small ruminants. The system had two components: a mobile base unit, mounted on the animal under study, and a fixed base unit. Wireless communication between the mobile and fixed units was performed using a Xbee Series 2 radio frequency transceiver whereas data were recorded and transferred to a secure digital card in the mobile unit. The device was mounted in Santa Inês crossbred sheep using reference...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Embedded electronics; Physiological responses; Precision livestock farming.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000200166

Determination of piglets’ rectal temperature and respiratory rate through skin surface temperature under climatic chamber conditions
Provedor de dados: 70
Autores: Mostaço,Gustavo M.; Miranda,Késia O. da S; Condotta,Isabella C. F. da S; Salgado,Douglas D’Alessandro.
ABSTRACT In animal farming, an automatic and precise control of environmental conditions needs information from variables derived from the animals themselves, i.e. they act as biosensors. Rectal temperature (RT) and respiratory rate (RR) are good indicators of thermoregulation in pigs. Since there is a growing concern on animal welfare, the search for alternatives to measure RT has become even more necessary. This research aimed to identify the most adequate body surface areas, on nursery-phase pigs, to take temperature measurements that best represent the correlation of RT and RR. The main experiment was carried out in a climate chamber with five 30-day-old littermate female Landrace x Large White piglets. Temperature conditions inside chamber were varied...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Thermal control; Animal welfare; Temperature sensors; Physiological modelling; Precision livestock farming; Environmental control for swine.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000600979

Uso de Filtro de Kalman para processamento de dados de pesagem diária para bovinos de corte.
Provedor de dados: 14
Autores: HIGA, R. H.; CARROMEU, C.; OLIVEIRA, C. C. de; ALMEIDA, R. G. de; SPERANZA, E. A.
Resumo - O presente estudo analisa a utilização de Filtros de Kalman (FK) para processamento de dados de pesagem diária de bovinos de corte utilizando um conjunto composto por pesagens diárias de 36 animais, coletados por 209 dias. Os resultados demonstram que o processamento de dados de pesagem diária com o Filtro de Kalman Polinomial (FKP) reduz o nível de ruído presente nos dados, viabiliza a extração do ganho de peso diário por animal, bem como torna factível a realização de predições do peso, por animal, 30 dias à frente. Adicionalmente, a utilização do FK não impacta a tomada de decisão no contexto do lote, uma vez que o peso médio dos animais no lote também não é afetado pelo FK.
Tipo: Folhetos
Palavras-chave: Bovino de corte; Bovinos de corte; Filtro de Kalman; Pecuária de precisão; Ganho de peso diário; Kalman filter; Precision livestock farming; Daily weight gain; Gado Nelore; Peso; Beef cattle.
Ano: 2022
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1150330

An expert system for planning and designing dairy farms in hot climates
Provedor de dados: 111
Autores: Mohamed Samer; Cairo University, Faculty of Agriculture, Department of Agricultural Engineering; Mohamed Hatem; Hartmut Grimm; Reiner Doluschitz; Thomas Jungbluth.
Eleven simulation models were developed to plan and design several dairy farm facilities.  Subsequently, an electronic spark map (decision tree) was developed for each simulation model, and then the simulation models were integrated into the relevant spark maps.  Afterwards, C# language (C Sharp), which is an object-oriented programming language, was used to develop an expert system via the simulation models and the electronic spark maps.  The developed expert system is able to plan and design several dairy farm facilities, e.g. housing system (corrals system), shade structure and roof material, concrete base, cooling system, milking parlour, forage storage, and manure handling system.  Subsequently, it plans the farmstead layout, and it leads to implement...
Palavras-chave: Expert systems; Simulation models; Spark maps; Precision livestock farming; Dairy cows.
Ano: 2012
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2088

Defining upper critical temperatures for an effective climate control to reduce heat stress
Provedor de dados: 111
Autores: Sanz, Salvador Calvet.
The definition of homeotherm animal responses to temperature has traditionally based on metabolic and thermal physiology studies. The thermoneutral zone is defined as the range of ambient temperature within which metabolic rate is at a minimum, and within which temperature regulation is achieved by non-evaporative physical processes alone. As temperature raises, animals the upper critical temperature is reached, which is the ambient temperature above which thermoregulatory evaporative heat loss processes of a resting thermoregulating animal are recruited. These temperatures depend on a variety of factors including animal species and breed, age, adaptation or animal status, among others. These are influenced by other environmental conditions such as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal Production Heat stress; Precision livestock farming; Critical temperature; Welfare; Indicators; Climate control.
Ano: 2018
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4782