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| Registros recuperados: 17 | |
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| Bittig, Henry C.; Maurer, Tanya L.; Plant, Joshua N.; Schmechtig, Catherine; Wong, Annie P. S.; Claustre, Hervé; Trull, Thomas W.; Udaya Bhaskar, T. V. S.; Boss, Emmanuel; Dall’olmo, Giorgio; Organelli, Emanuele; Poteau, Antoine; Johnson, Kenneth S.; Hanstein, Craig; Leymarie, Edouard; Le Reste, Serge; Riser, Stephen C.; Rupan, A. Rick; Taillandier, Vincent; Thierry, Virginie; Xing, Xiaogang. |
| The Biogeochemical-Argo program (BGC-Argo) is a new profiling-float-based, ocean wide, and distributed ocean monitoring program which is tightly linked to, and has benefited significantly from, the Argo program. The community has recommended for BGC-Argo to measure six additional properties in addition to pressure, temperature and salinity measured by Argo, to include oxygen, pH, nitrate, downwelling light, chlorophyll fluorescence and the optical backscattering coefficient. The purpose of this addition is to enable the monitoring of ocean biogeochemistry and health, and in particular, monitor major processes such as ocean deoxygenation, acidification and warming and their effect on phytoplankton, the main source of energy of marine ecosystems. Here we... |
| Tipo: Text |
Palavras-chave: Ocean observation; Ocean biogeochemical cycles; Sensors; Carbon cycle; Ocean optics; Best practices; Argo. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00512/62344/66607.pdf |
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| Mensah, Vigan; Roquet, Fabien; Siegelman-charbit, Lia; Picard, Baptiste; Pauthenet, Etienne; Guinet, Christophe. |
| The effect of thermal mass on the salinity estimate from conductivity-temperature-depth (CTD) tags sensor mounted on marine mammals is documented, and a correction scheme is proposed to mitigate its impact. The algorithm developed here allows for a direct correction of the salinity data, rather than a correction of the sample's conductivity and temperature. The amplitude of the thermal mass-induced error on salinity and its correction are evaluated via comparison between data from CTD tags and from Sea-Bird Scientific CTD used as a reference. Thermal mass error on salinity appears to be generally O(10(-2)) g kg(-1), it may reach O(10(-1)) g kg(-1), and it tends to increase together with the magnitude of the cumulated temperature gradient (T-HP) within the... |
| Tipo: Text |
Palavras-chave: Data processing; In situ oceanic observations; Instrumentation; Sensors; Profilers; Oceanic. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00585/69697/67577.pdf |
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| Kim,Jaeyoung; Kim,Ki-Seung; Kim,Yoonha; Chung,Yong Suk. |
| ABSTRACT Drought is a major threat worldwide for crop production, especially due to the rapid climate changes. Current drought solutions involve improving irrigation system, rainwater harvesting, damming, cloud seeding, and changes of cultivation methods. Despite effective, each solution has economic, environmental, and temporal drawbacks. Among all solutions, the most effective, inexpensive and manageable method is the use of drought-tolerant cultivars via plant breeding. However, conventional plant breeding is a time-consuming and laborious task, especially for phenotypic data acquisition of target traits of numerous progenies. High-throughput phenotyping (HTP) is a recently developed method and has potential to overcome the mentioned issues. HTP offers... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sensors; Remote sensing platforms; Image analysis; Drought solution; Plant breeding. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000401801 |
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| Andre, Xavier; Moreau, Bertrand; Le Reste, Serge. |
| The scientific community observes the ocean for applications in the fields of oceanography and climate research. In order to recover in situ data, more than 3,000 profiling floats are operated in the framework of the Argo Program. Each float performs cycles between the sea surface and a depth of 2,000 meters. Scientific data are gathered while the float is travelling upward from the depths of the oceans, and are then transmitted via a satellite communication system at the end of each cycle. During its time at the surface, mainly dedicated to transmissions, the float is vulnerable and subject to drift, which limits its use in many studies. Moreover, transmission times are becoming longer due to a trend towards high resolution or multi-sensor profiles.... |
| Tipo: Text |
Palavras-chave: Buoy observations; In situ oceanic observations; Instrumentation; Sensors; Profilers; Oceanic. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00284/39519/38011.pdf |
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| Renard, V. |
| The side looking sonars have been developed for greater swath coverage, digital processing of the signals has improved the quality of the images and interferometric techniques have been used to determine the depth of the bottom features. A review of the systems existing today is presented. Documents such as graphs, block diagrams, images, maps, sections, created from data acquired at sea level suffer from a filtering or smoothing effect that restricts the representativity of the measured parameters and therefore limits their interpretation. The greater the depth of the seafloor, the greater the filtering. It is due not only to the nature of the measured phenomenon but also the characteristics of the sensors, to their operation and to the data processing.... |
| Tipo: Text |
Palavras-chave: Bathymetry; Cartography; Sensors; Echosounders; Acoustic imagery; Acoustics; Ocean floor; Seafloor mapping. |
| Ano: 1990 |
URL: http://archimer.ifremer.fr/doc/1990/acte-1147.pdf |
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| Durand, D; Domingo, J; Levallois, E. |
| This system is composed of a high accuracy hydraulic manipulator arm with 6 degrees of freedom, for high loads (2000 daN), using ultrasound proximetry and contact force measurement data to carry out the subsea connection of bottom oil wells. An expert system controls the connection phases and generates the sequences of commands to be executed by the robot. The safety systems and failure modes are also taken into account. A graphic operator station provides easy control. Each connection phase generates a graphic representation of the robot status and all the proprioceptive and exteroceptive sensors. The control/command system, although it is designed to carry out a subsea connection by means of a manipulator arm, can be adapted to any type of process. For... |
| Tipo: Text |
Palavras-chave: Marine technology; Acoustics; Connecting; Connectors; Oil wells; Sensors; Hydraulics; Robots; Manipulators. |
| Ano: 1990 |
URL: http://archimer.ifremer.fr/doc/1990/acte-1155.pdf |
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| Daste, S. |
| The "CRABE" method is a crack detection technique based on the use of low electromagnetic frequencies. This (patented) method relies on a global injection of current within the structure under inspection. The presence of a crack shall cause a disruption in the current flow, and consequently of the magnetic field off the surface in the vicinity of a defect. It is this magnetic signature which is detected by the magnetic sensor used with "CRABE". The major advantage of this process, developed by TRAVOCEAN and the LETI Division of CEA with the help of IFREMER, appears clearly: No preliminary cleaning of the welds to be inspected is required, since no contact is necessary. Similarly, it shall be possible to inspect the whole of structures to a total cost all... |
| Tipo: Text |
Palavras-chave: Offshore structures; Fouling; Underwater exploration; Steel structures; Sensors; Cracks; Detection; Unmanned vehicles; Marine technology. |
| Ano: 1990 |
URL: http://archimer.ifremer.fr/doc/1990/acte-1161.pdf |
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| Otsuka, K. |
| The JAMSTEC/Deep Tow Camera System conducts pre-site-surveys for the manned submersible "SHINKAI 2000". The vehicle is towed by double armored coaxial cable (RG-8/U) of 4500 m length. The color composite video signal is converted to an FM signal with central frequency of 6.15 MHz because it is very difficult to compensate completely for the transmission loss of video frequency through the coaxial cable. The data from the CTD sensors and the altimeter are displayed with date and time on the monitor screen in real time. Temperature data has proved very important in finding hydrothermal anomaly phenomena. Two years ago, our research group found an active chimney at North Fiji Basin during cooperative cruise between France and Japan. Last year, we deployed... |
| Tipo: Text |
Palavras-chave: Altimeters; Sensors; Television systems; Underwater cameras; Ocean floor; Unmanned vehicles. |
| Ano: 1990 |
URL: http://archimer.ifremer.fr/doc/1990/acte-1153.pdf |
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| CRUVINEL,PAULO ESTEVÃO. |
| This paper describes a low-cost microprocessed instrument for in situ evaluating soil temperature profile ranging from -20.0°C to 99.9°C, and recording soil temperature data at eight depths from 2 to 128 cm. Of great importance in agriculture, soil temperature affects plant growth directly, and nutrient uptake as well as indirectly in soil water and gas flow, soil structure and nutrient availability. The developed instrument has potential applications in the soil science, when temperature monitoring is required. Results show that the instrument with its individual sensors guarantees ±0.25°C accuracy and 0.1°C resolution, making possible localized management changes within decision support systems. The instrument, based on complementary metal oxide... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil management equipment; Thermal properties; Microprocessors; Sensors. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2000001100020 |
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| Guzmán Luna, Ricardo. |
| El objetivo de este trabajo fue desarrollar un sistema de adquisición de datos meteorológicos en tiempo real utilizando un controlador lógico programable (PLC) como una alternativa dentro de las estaciones meteorológicas comerciales. Para sensar la: temperatura del aire, humedad relativa, radiación solar, precipitación, velocidad y dirección del viento, se usaron sensores comerciales, durante el periodo comprendido entre el 23 de Mayo al 3 de Junio de 2013, para probar la estación, en la estación meteorológica del Colegio de Postgraduados Campus Montecillo. El sistema se compone de un PLC (modelo CX1020, marca Beckhoff), una Laptop donde se instaló una aplicación de monitoreo en tiempo real que se desarrolló en Visual Basic 2010 Express y la base de datos... |
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Palavras-chave: Estaciones automáticas; Meteorología; Sensores; Tiempo real; Automatic stations; Meteorology; Sensors; Real time; Hidrociencias; Maestría. |
| Ano: 2013 |
URL: http://hdl.handle.net/10521/2156 |
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| Reverdin, G.; Boutin, J.; Martin, N.; Lourenco, A.; Bouruet-aubertot, P.; Lavin, A.; Mader, J.; Blouch, P.; Rolland,; Gaillard, Fabienne; Lazure, Pascal. |
| The accuracy of temperature measurements from drifters is first examined for 16 drifters (manufactured either by Metocean Data Systems or by Pacific Gyre) deployed with two temperature sensors in the tropical or North Atlantic Ocean. One of these sensors is the SST thermistor commonly used on Surface Velocity Program (SVP) drifters since the late 1980s; whereas the other sensor is a platinum temperature probe associated with a Seabird conductivity cell. The authors find (for 19 separate deployments) an average positive offset of the SST thermistor measurements in 17 out of 19 cases, exceeding 0.1 degrees C in five instances. Among the five drifters that were at sea for a year or more, two present a large trend in this offset (0.10 degrees and -0.10 degrees... |
| Tipo: Text |
Palavras-chave: Temperature; Sea surface temperature; Instrumentation; Sensors. |
| Ano: 2010 |
URL: https://archimer.ifremer.fr/doc/00012/12327/9112.pdf |
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| Registros recuperados: 17 | |
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