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| Registros recuperados: 37 | |
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| Wang, Zhaohui Aleck; Moustahfid, Hassan; Mueller, Amy V.; Michel, Anna Pm; Mowlem, Matthew; Glazer, Brian T.; Mooney, T. Aran; Michaels, William; Mcquillan, Jonathan S.; Robidart, Julie C.; Churchill, James; Sourisseau, Marc; Daniel, Anne; Schaap, Allison; Monk, Sam; Friedman, Kim; Brehmer, Patrice. |
| Advancing our understanding of ocean biogeochemistry, biology, and ecosystems relies on the ability to make observations both in the ocean and at the critical boundaries between the ocean and other earth systems at relevant spatial and temporal scales. After decades of advancement in ocean observing technologies, one of the key remaining challenges is how to cost-effectively make measurements at the increased resolution necessary for illuminating complex system processes and rapidly evolving changes. In recent years, biogeochemical in situ sensors have been emerging that are threefold or more lower in cost than established technologies; the cost reduction for many biological in situ sensors has also been significant, although the absolute costs are still... |
| Tipo: Text |
Palavras-chave: In situ; Sensor; OceanObs; Ocean technology; EOVs; Biogeochemistry; Biology; Cost effective. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00514/62567/66921.pdf |
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| Molin,José P.; Souza,Adriano B. M.; Fontana,Gustavo; Nagumo,Gustavo K.. |
| Um dos fatores que influencia diretamente no desempenho de sistemas mecanizados é a velocidade de deslocamento pela sua importância no planejamento e na execução das operações agrícolas. O objetivo deste trabalho foi avaliar a acurácia de quatro sensores de velocidade, em condições de superfície asfáltica, solo com cobertura vegetal, aclives e declives, acelerações e desacelerações, submetidos a velocidades representativas para aplicações agrícolas. Foram ensaiados dois modelos comerciais de sensores de radar, um sensor de GPS e um sensor óptico. Foram identificadas diferenças significativas para as situações de solo com cobertura vegetal, acelerações e desacelerações. Para a superfície asfáltica, em situação de velocidade constante, os sensores avaliados... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sensor; GPS; Radar. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162005000300023 |
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| SANCHES, A. C.; SOUZA, D. P. de; JESUS, F. L. F. de; MAFFEI, R. G.; MENDONÇA, F. C.; PEZZOPANE, J. R. M.. |
| O conhecimento do teor de água no solo é importante para o manejo adequado da irrigação, pois permite estimar a quantidade necessária de água a ser aplicada no tempo correto. Sensores de capacitância são uma alternativa de quantificação do teor de água do solo (θ, m3 m-3), provendo leituras em profundidade de forma prática e rápida. Uma sonda capacitiva foi calibrada em um Nitossolo vermelho Eutroférrico Latossólico cultivado com forrageiras tropicais na área experimental da ESALQ/USP na cidade de Piracicaba (SP), Brasil. Quatro tubos de acesso foram instalados e, a cada duas semanas, foram coletadas amostras com três repetições para cada nível de profundidade, até o final de oito semanas, partindo do θsaturado. Efetuaram-se leituras com... |
| Tipo: Artigo de periódico |
Palavras-chave: Sensor; Manejo da irrigação; Reflectometria no domínio da frequência; Umidade do Solo. |
| Ano: 2020 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1126774 |
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| TEIXEIRA, J. P.; TORRE NETO, A.; GHINI, R.. |
| Resumo: O experimento FACE (Free Air Carbon-dioxide Enrichment), localizado na Embrapa Meio Ambiente (Jaguariúna, SP), tem o objetivo de estudar os impactos do aumento da concentração de CO2 da atmosfera sobre a cultura do café. Sensores comerciais de CO2, baseados na técnica IRGA (Infrared gas analyzer), estão instalados na área e são parte fundamental da instrumentação do sistema. O objetivo deste trabalho foi desenvolver um método de calibração desses sensores. Para garantir maior eficiência no processo, foi implementado um kit que possibilita a calibração de até seis sensores simultaneamente. O método se mostrou eficaz em 75% dos sensores modelo GMP222 e 100% dos sensores modelo GMP343, ambos fabricados pela empresa Vaisala. |
| Tipo: Separatas |
Palavras-chave: Sensor; Free Air Carbon-dioxide Enrichment; CO2; IRGA; Cardon dioxide; Sensors.; Coffee; Dióxido de carbono; Clima; Café; Climate change.. |
| Ano: 2013 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/968119 |
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| Silva,Cláudio Ricardo da; Andrade Júnior,Aderson Soares de; Alves Júnior,José; Souza,Antonio Barros de; Melo,Francisco de Brito; Coelho Filho,Maurício Antonio. |
| The use of capacitance sensors is one of the methods used to quantitatively measure soil water contents (theta, m³ m-3). Sensors provide readings at desired depths and time intervals. A capacitance probe (Diviner 2000) was calibrated for a Rhodic Paleudult from the Piaui State, Brazil. Six access tubes were installed in a 5 × 2 m grid arrangement. Three moisture levels (saturated, moist and dry) were used in two replications. Probe readings and soil samplings to determine theta were made at 0.1 m depth intervals down to a depth of 1.0 m. A power calibration equation was developed for each depth as well as for the entire soil profile (Root Mean Square Error = 0.014, R² = 0.93) for a theta range of 0.068 to 0.264 m³m-3. A separate calibration for each depth... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: FDR probe; Sensor; Irrigation; Soil water content. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000600012 |
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| SANCHES, A. C.; SOUZA, D. P. de; JESUS, F. L. F. de; MAFFEI, R. G.; MENDONÇA, F. C.; PEZZOPANE, J. R. M.. |
| Knowledge of soil water content is important for proper irrigation management because it allows estimating the required amount of water to be applied at the correct time. Capacitance sensors are an alternative of quantification of soil water content (?, cm3 cm-3 ), providing depth readings in a practical and fast way. A capacitive probe (Diviner 2000®) was calibrated in a eutroferric red nitosol cultivated with irrigated forages at the experimental area of ESALQ/USP in the city of Piracicaba - SP, Brazil. Four access tubes were installed and every 2 weeks samples were collected with 3 replicates for each depth level, by the end of 8 weeks starting from ?saturated. Readings were taken with the equipment for every 0.1 m of soil up to 0.7 m of depth, together... |
| Tipo: Separatas |
Palavras-chave: Sensor; Frequency domain reflectometry.; Irrigation management.. |
| Ano: 2017 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1078230 |
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| Ferreira, Karina Casagrande; Jericó, Márcia Marques; de Pietro, Achille Marcelo; dos Santos, Elídia Zotelli; Sewastjanow, Liliam; Leite, Talita; Baptista, Juliana. |
| The maintenance of body glucose in proper levels is of paramountimportance to the homeostasis control, offering a fundamentalenergetic substrate for the proper organic performance. For thepurposes of measuring body glucose levels, there are available portableand laboratory assessment techniques. Therefore, aiming at futureclinical trials on body glucose variation in dogs, it had the purpose ofobserving the feasibility of a continuous interstitial glucose monitoringsystem named CGMS® (Continuous Glucose Monitoring System,Guardian Real-Time System/Medtronic/U.S.A.). Eight clinically healthydogs composed the study group and all of them presented the highestinterstitial glucose values during the contention and obtaining processof venous blood samples for the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Blood glucose; Glucometer; Venous; Sensor; Calibration Glicemia; Glicosímetro; Venosa; Sensor; Calibração. |
| Ano: 2016 |
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/28822 |
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| Tabile,Rubens A; Godoy,Eduardo P; Pereira,Robson R. D; Tangerino,Giovana T; Porto,Arthur J. V; Inamasu,Ricardo Y. |
| Parameters such as tolerance, scale and agility utilized in data sampling for using in Precision Agriculture required an expressive number of researches and development of techniques and instruments for automation. It is highlighted the employment of methodologies in remote sensing used in coupled to a Geographic Information System (GIS), adapted or developed for agricultural use. Aiming this, the application of Agricultural Mobile Robots is a strong tendency, mainly in the European Union, the USA and Japan. In Brazil, researches are necessary for the development of robotics platforms, serving as a basis for semi-autonomous and autonomous navigation systems. The aim of this work is to describe the project of an experimental platform for data acquisition in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Precision agricultural; CAD; CAE; ISOBUS; Robotic; Sensor. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162011000100013 |
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| Reis,Elton F. dos; Borges Neto,Antônio C.; Couto,Ródney F.. |
| ABSTRACT: The aim of this study was evaluate the longitudinal distribution of maize seeds using a seeding line prototype, whit a microcontroller data acquisition system, at different speeds and types of horizontal feeder discs. Initially it was constructed a prototype simulator of seeding line, in the laboratory, and mounted two systems of microcontroller data acquisitions with infrared sensors for maize seeds counting. A test was conducted in a completely randomized design in split plots with factorial scheme of treatments 5 x 2 x 2, being the parcel two types of microcontroller data acquisition systems (infrared sensors in parallel and an diffuse infrared sensor), the factors were two feeder discs of maize seeds (inclined and normal) and five sowing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sensor; Microcontroller; Horizontal disc. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000601148 |
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| Registros recuperados: 37 | |
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