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| Registros recuperados: 26 | |
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| ROCHA NETO,ODÍLIO C. DA; TEIXEIRA,ADUNIAS DOS S.; BRAGA,ARTHUR P. DE S.; SANTOS,CLEMILSON C. DOS; LEÃO,RAIMUNDO A. DE O.. |
| Precision irrigation seeks to establish strategies which achieve an efficient ratio between the volume of water used (reduction in input) and the productivity obtained (increase in production). There are several studies in the literature on strategies for achieving this efficiency, such as those dealing with the method of volumetric water balance (VWB). However, it is also of great practical and economic interest to set up versatile implementations of irrigation strategies that: (i) maintain the performance obtained with other implementations, (ii) rely on few computational resources, (iii) adapt well to field conditions, and (iv) allow easy modification of the irrigation strategy. In this study, such characteristics are achieved when using an Artificial... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Precision irrigation; Automation; Neural algorithms. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000200266 |
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| Silva,Irenilson M. da; Pandorfi,Héliton; Almeida,Gledson L. P.; Guiselini,Cristiane; Henrique,Hugo M.. |
| The aim of this paper was to evaluate the automated acclimatization effects during pre-milking of cows on thermal conditioning, physiology, milk production and cost-benefit of the automated adiabatic evaporative cooling system (AECS). The treatments 20; 30; 40 min and control consisted of exposure time of pre-milking cows to the automated AECS. Sixteen cows were used with an average daily milk yield of 19 kg, distributed in a 4 x 4 Latin square design. The Tukey's test (P<0.05) was used to compare the means. The environmental variables, dry bulb temperature (DBT, ºC) and relative humidity (RH, %), were recorded every minute, which allowed the determination of the system efficiency through the Temperature and Humidity Index (THI). The respiratory rate... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Thermal comfort; Automation; Dairy cattle; Evaporative cooling system. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162011000500002 |
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| Ferrarezi,Rhuanito S; Iersel,Marc W van; Testezlaf,Roberto. |
| ABSTRACT: Subirrigation applies water and nutrients to the bottom of pots without wetting leaves, improving water use and reducing disease spread compared to overhead irrigation systems. However, water levels applied within the benches are often higher than required to promote capillary action, applying more water than needed and wasting pumping energy. The present study was conducted to evaluate the effect of different water levels on plant growth of subirrigated salvia (Salvia splendens) 'Vista Red' in two substrates. Five water levels (0.75, 1.5, 3.0, 4.5, and 6.0 cm) and two substrates {pine bark: sphagnum peat moss and peat: perlite (both 75%: 25% v/v)} were tested, with four replications. Substrate moisture was monitored by capacitance-type sensors... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Salvia splendens; Subirrigation; Automation; Capacitance sensors; Irrigation; Water management.. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362016000200202 |
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| Lepoupon, C; Lin, Rg; Benaim, Jy; Merks, Aga. |
| The accurate classical batch method of Duursma (1961), based on the conversion of Dissolved Organic Nitrogen (DON) into NH3, is used as a basis for a new automatic DON analyser. After testing different possibilities through mechanical automation of the original batch technique, in which the conversion is preceded by the degassing of NH3 and drying of the sample, the procedure of autoanalyses has been selected. This procedure was simplified to the extent that a compact unit could be constructed, which would easily be applicable on board ship. The automatic method has a conversion phase in which in principle only DON is dissociated to NH4+, whereas both NO2- add NO3- are not reduced. This requires selective conditions and particularly high silver purity for... |
| Tipo: Text |
Palavras-chave: Dissolved organic nitrogen; Analysis; Automation; Reduction; Total nitrogen. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00093/20456/18128.pdf |
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| Haure, Joel; Palvadeau, Hubert; Nourry, Max; Penisson, Christian; Martin, Jean-louis. |
| A study was realized to automate the distribution of phytoplankton (Skeletonema costatum) in the extensive breedings of shells of commercial interest. Physical parameters were selected to define their domain of application for the realization of such a project The work was realized in spring (in June, 1999) and in autumn (in November, 1999) in different dilution of phytoplankton in a treated subterranean salt water. The results showed that the fluorescence gave a better sensibility to inter seasonal in the explanation of the distributed food, but lost as representation during the night-phases, On the other hand, the absorption ( optical density) presented less daily variability and with good correlations with the nourishing concentration of the environment... |
| Tipo: Text |
Palavras-chave: Fluorescence in vivo; Absorption in vivo; Automatisation; Skeletonema costatum; Fluorescence in vovo; Absorption in vivo; Automation; Skeletonema costatum. |
| Ano: 2002 |
URL: http://archimer.ifremer.fr/doc/00047/15870/13289.pdf |
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| Silva, Eduardo Luis da; Ferreira, Marco Aurelio Marques; Abrantes, Luiz Antonio; Costa, Thiago De Melo Teixeira Da. |
| Esse trabalho teve como objetivo verificar a viabilidade financeira da implementação de um sistema automatizado de irrigação por miniaspersão na cultura do feijão. O trabalho toma como referência a teoria de análise financeira de investimentos, considerando a abordagem determinística e probabilística. Os dados relativos à produtividade do feijoeiro, ao sistema de irrigação por miniaspersão, bem como os coeficientes técnicos, os custos de produção e as receitas de venda foram baseados em experimentos e coletas de dados realizados por pesquisadores da UFV. Diante dos resultados, pode-se concluir que tanto nos cenários determinístico e probabilístico, o projeto de irrigação por miniaspersão na cultura de feijão apresenta-se viável. O projeto é... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Investimento; Agronegócios; Risco; Feijão; Automação; Investment; Agrobusiness; Risk; Bean; Automation; Crop Production/Industries. |
| Ano: 2008 |
URL: http://purl.umn.edu/112721 |
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| Jordão,Marcelo D. L.; Paiva,Kary de; Firmo,Heloisa T.; Inácio,Caio T.; Rotunno Filho,Otto C.; Lima,Tomé de A. e. |
| ABSTRACT Temperature monitoring is an important procedure to control the composting process. Due to cost limitation, temperature monitoring is manual and with daily sampling resolution. The objective of this study was to develop an automatic station with US$ 150 dollars, able to monitor air temperature at two different points in a compost pile, with a 5-min time resolution. In the calibration test, the sensors showed an estimated uncertainty from ± 1 to ± 1.9 ºC. In the field validation test, the station guaranteed secure autonomy for seven days and endured high humidity and extreme temperature (> 70 °C). |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Organic waste; Automation; Social technology; Arduino. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017001100809 |
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| Saretta,Ezequiel; Camargo,Antonio P. de; Botrel,Tarlei A.; Pinto,Marinaldo F.; Katsurayama,Geancarlo T.; Frizone,José A.. |
| ABSTRACT Current meters are equipment widely used for estimating flow velocity in rivers and streams. Periodic calibrations of current meters are important to ensure the quality of measurements, but the required testing facilities are complex and only available in a few institutions. However, advances in electronics and automation may contribute to developing simple and reliable calibration systems. Thus, this study aimed to develop an automated system for testing current meters, which consisted of a trapezoidal channel, a step motor, a tow car and a management system, composed of a supervisory application and microprocessed modules to control the motor and the data acquisition. Evaluations of the displacement velocity showed that it matched the reference... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hydrometry; Electronics; Automation; Calibration. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000200181 |
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| Camargo,Samila Silva; Rufato,Leo; Magro,Maicon; Souza,André Luiz Kulkamp de. |
| Abstract The in vitro propagation technique via temporary immersion bioreactors is a tool that, through the culture in a liquid medium, allows an increase in the efficiency of seedling production. Several researches with the strawberry crop have shown greater efficiency of the system compared to the conventional process of micropropagation in solid medium. In this sense, the objective herein was to establish a protocol of multiplication and rooting of the ‘Pircinque’ strawberry, in temporary immersion bioreactors. Two distinct and independent studies were carried out, characterized by the multiplication and rooting stages of strawberry explants, newly introduced and registered in Brazil. Two culture media (MS and KNOP) were studied and, as a control... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fragaria Ananassa; Micropropagation; Automation; Liquid medium. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000101001 |
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| Registros recuperados: 26 | |
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