87 research outputs found
Particle-Filtering-Based State-of-Health Estimation and End-of-Life Prognosis for Lithium-Ion Batteries at Operation Temperature
We present the implementation of a particle-filtering-based framework that estimates the State-of-Health (SOH) and predicts the End-of-Life (EOL) of Lithium-Ion batteries, efficiently incorporating variations of ambient temperature in the analysis. The proposed approach uses an empirical state-space model, in which inputs are explicitly defined as the average temperature of operation and the output of an external module that detects self-recharge phenomena, on the other hand the output is a function that relates the current SOH and temperature with the Usable Capacity in that cycle. In addition, this approach allows to deal with data losses and outliers. In order to correct erroneous initial conditions in state estimates, an Outer Feedback Correction Loop is implemented. Finally, this framework is validated using degradation data from four sources: experimental degradation data from two Li-Ion 18650 cells, accelerated degradation data openly provided by NASA Ames Research Center, and artificially generated degradation data at different ambient temperatures.We present the implementation of a particle-filtering-based framework that estimates the State-of-Health (SOH) and predicts the End-of-Life (EOL) of Lithium-Ion batteries, efficiently incorporating variations of ambient temperature in the analysis. The proposed approach uses an empirical state-space model, in which inputs are explicitly defined as the average temperature of operation and the output of an external module that detects self-recharge phenomena, on the other hand the output is a function that relates the current SOH and temperature with the Usable Capacity in that cycle. In addition, this approach allows to deal with data losses and outliers. In order to correct erroneous initial conditions in state estimates, an Outer Feedback Correction Loop is implemented. Finally, this framework is validated using degradation data from four sources: experimental degradation data from two Li-Ion 18650 cells, accelerated degradation data openly provided by NASA Ames Research Center, and artificially generated degradation data at different ambient temperatures
Biscay AGL. An observatory for state of the art operational oceanography at IEO. Derived products, sensor networks and future developments.
Since 1991, shelf and slope waters of the Southern Bay of Biscay are regularly sampled in a monthly hydrographical section north of Santander. From 2003, a deep hydrological standard section was included and on June 2007, an ocean-meteorological buoy was moored at the end of Santander Section (www.boya_agl.st.ieo.es). All of three are part of IEOOS (IEO Observing System). Biscay AGL is one observatory for the EU FixO3 project.
The combination of these resources leads to a powerful tool, Biscay AGL, which is more than the combination of the AGL Buoy and the hydrographical samplings. This tool produces not only time series of several parameters at different time resolutions but also derived products, both real and delayed time. Derived products from this buoy include, annual cycles as well as anomalous values. In particular ones such as air-sea heat fluxes, salinity and water temperatures anomalies, sub inertial currents series, chlorophyll surface series, estimate of the mixed layer depth and wind and currents roses.
Many sensor networks have been deployed to monitor marine environment, and more will follow in the future. Due to the large number of sensor manufacturers, integrating diverse sensors into observation systems is not straightforward. By defining standardized service interfaces it is possible to enable access to sensor networks and archived sensor data that can be discovered and accessed using standard protocols and application programming interfaces. Future developments include the deployment of a full sensor network as well as adding new devices to the Biscay AGL tool in order to achieve deeper knowledge of the ocean
Oral mucosal peeling related to dentifrices and mouthwashes : a systematic review
The aim of this systematic review was to summarise the clinical information available about oral mucosal peeling (OMP) and to explore its aetiopathogenic association with dentifrices and mouthwashes. PICOS outline: Population: subjects diagnosed clinically and/or pathologically. Intervention: exposition to oral hygiene products. Comparisons: patients using products at different concentrations. Outcomes: clinicopathological outcomes (primary) and oral epithelial desquamation (secondary) after use. Study design: any. Exclusion criteria: reports on secondary or unpublished data, in vitro studies. Data were independently extracted by two reviewers. Fifteen reports were selected from 410 identified. Descriptive studies mainly showed low bias risk, experimental studies mostly an ?unclear risk?. Dentifrices or mouthwashes were linked to OMP, with an unknown origin in 5 subjects. Sodium lauryl-sulphate (SLS) was behind this disorder in 21 subjects, tartar-control dentifrices in 2, and flavouring agents in 1 case. Desquamation extension was linked to SLS concentration. Most cases were painless, leaving normal mucosa after desquamation. Tartar-control dentifrices caused ulcerations more frequently. OMP management should consider differential diagnosis with oral desquamative lesions, particularly desquamative gingivitis, with a guided clinical interview together with pathological confirmation while discouraging the use of the product responsible for OMP
Sensor Networks and derived products at Biscay AGL observatory. State of the art operational oceanography at IEO
Since 1991, shelf and slope waters of the Southern Bay of Biscay are regularly
sampled in a monthly hydrographical section north of Santander, and on June 2007,
an ocean meteorological buoy was moored at the end of Santander Section (www.
boya_agl.st.ieo.es). Both are part of IEOOS (IEO Observing System). Biscay AGL is
one observatory for the EU FixO3 project. Many sensor networks have been deployed
to monitor marine environment, and more will follow in the future. Due to
the large number of sensor technologies, integrating diverse sensors into observation
systems is not straightforward. By defining standardized service interfaces (like
those based on OGC standards) it is possible to enable access to sensor networks
and archived sensor data that can be discovered and accessed using standard protocols
and application programming interfaces, therefore complying with the requirements
of the INSPIRE directive. Future developments include the deployment of a
full sensor network as well as adding new devices to the Biscay AGL tool in order
to achieve a deeper knowledge of the ocean. Biscay AGL is more than the combination
of the AGL Buoy and the hydrographical samplings. This observatory produces
not only time series of several parameters at different time resolutions but also derived
products, both in real and in delayed time. Derived products from this buoy include
annual cycles as well as anomalies of physical and biogeochemical magnitudes
like air-sea heat fluxes, salinity and water temperatures, sub inertial currents, surface
chlorophyll. Different products are derived from in-situ measurements at the AGL
buoy like estimates of the mixed layer depth, wind and currents roses and wave intensity
diagrams
Research and operational products from the combination of a monthly hydrographic station and an oceanic buoy: The Biscay AGL fixed-point water column observatory.
Long term time series are an important tool for increasing the knowledge of ocean processes as well as for studying
water masses variability in different time scales and changes and tendencies in marine ecosystems.
Time series has been classically obtained by oceanographic ships that regularly cover standard sections and stations.
From 1991, shelf and slope waters of the Southern Bay of Biscay are regularly sampled in a monthly hydrographic
line north of Santander to a depth of 1000 m in early stages and for the whole water column down to
2580 m in recent times. Nearby, in June 2007, the IEO deployed an oceanic-meteorological buoy (AGL Buoy, 43º
50.67’N; 3º 46.20’W, and 40 km offshore, www.boya-agl.st.ieo.es).
The long-term hydrographical record have allowed to define the seasonality, trends, and interannual variability at
all levels, including the mixing layer and the main water masses North Atlantic Central Water and Mediterranean
Water. The relation of these changes with high frequency surface conditions has been examined using the AGL
buoy data from 2007 as well as satellite and reanalysis data.
On that context and using that combination of sources, some products and quality controlled series of high interest
and utility for scientific purposes have been developed and are offered hourly in the web page. Main products
obtained are: SST and SSS anomalies, wave significant height character with respect to monthly average, and
currents with respect to seasonal averages. Ocean-atmosphere heat fluxes (latent and sensible) are computed from
the buoy atmospheric and oceanic measurements. Estimations of the mixed layer depth and bulk series at different
water levels are provided in a monthly basis.
Quality controlled series are provided for sea surface salinity, oxygen and chlorophyll data. Some sensors are
particularly affected by biofouling, and monthly visits to the buoy permit to follow these sensors behaviour.
Chlorophyll-fluorescence sensor is the main concern, but Dissolved Oxygen sensor is also problematic. Periods
of realistic smooth variations present strong offset that is corrected based on the Winkler analysis of water samples.
The incorporation of these observatories on larger scale research programs, as done in 2003 in the framework of
the VACLAN and COVACLAN projects, is important in order to provide them with a larger spatial dimension and
maximize its utility for process-oriented studies. In 2003, the Santander section was extended 90 miles offshore in
the framework of a large-scale hydrographic and circulation monitoring program.
Partnerships in a large EU project as FixO3 has provided tools for coordination, homogenization and data validation
as well as improve the use of chemical-biological data.0,000
Improving metric access methods with bucket files
Modern applications deal with complex data, where retrieval by similarity plays an important role in most of them. Complex data whose primary comparison mechanisms are similarity predicates are usually immersed in metric spaces. Metric Access Methods (MAMs) exploit the metric space properties to divide the metric space into regions and conquer efficiency on the processing of similarity queries, like range and k-nearest neighbor queries. \ud
Existing MAM use homogeneous data structures to improve query execution, pursuing the same techniques employed by traditional methods developed to retrieve scalar and multidimensional data. In this paper, we combine hashing and hierarchical ball partitioning approaches to achieve a hybrid index that is tuned to improve similarity queries targeting complex data sets, with search algorithms that reduce total execution time by aggressively reducing the number of distance calculations. We applied our technique in the Slim-tree and performed experiments over real data sets showing that the proposed technique is able to reduce the execution time of both range and k-nearest queries to at least half of the Slim-tree. Moreover, this technique is general to be applied over many existing MAM.CAPESCNPqFAPESPInternational Conference on Similarity Search and Applications - SISAP (8. 2015 Glasgow
New developments on Biscay-AGL Observatory. From derived products to sensor networks.
Biscay-AGL Observatory.
Since 1991, shelf and slope waters of the Southern Bay of Biscay are regularly sampled in a monthly hydrographical section north of Santander to a maximum depth of 2500m, as part of the IEO Radiales program. On June 2007, an ocean-meteorological buoy (AGL) was moored at the end of Santander standard section, 22nm north at 2850m depth, to complete the ocean information with the ocean-atmosphere interaction. All of them are part of IEO Observing System (1). The integrated system of AGL and its nearest hydrographic station (2600m depth) is named Biscay-AGL observatory. It is also one station for the EU FixO3 project. Joint resources and systematic analysis lead to a powerful tool, which is much more than the combination of the AGL buoy and the hydrographical samplings.
Data Access.
All AGL buoy collected data are added to the local database sited at IEO-Santander in real-time and, after rutinary automatised quality controls, they are immediately available through its dedicated webpage (www.boya_agl.st.ieo.es).
Monthly CTDO2 data from the hydrographic section are lab-calibrated in order to obtain acurated values of salinity, dissolved oxygen and density, and added to the long-term time series.
Biscay-AGL data are quality controlled, flagged and formatted according internationally agreed standards (2, 3) and routinely sent to the IEO Datacenter. This added-value controlled data are incorporated to the IEO permanent archive and made freely available through the SeaDataNet infrastructure for data access and discovery.
Derived products.
Data acquired by Biscay-AGL may be displayed as timeseries as usual, but end-users are benefited by derived products which provide direct information. A recently developed software tool produces not only timeseries of several parameters at different time resolutions but also derived products, both real and delayed time. Derived products from this buoy include, but not only, annual cycles as well as anomalous values, air-sea heat fluxes, salinity and water temperature anomalies, subinertial currents series, chlorophyll surface series, estimations of the mixed layer depth and wind and currents roses.
Sensor Web Enablement (SWE).
Sensor Web infrastructures are setup to access real-time data observed by sensors. This system has been implemented in AGL buoy sensors in order to simplify the retrieved events and alerts triggered through sensors. All those functionalities of the Sensor Web are provided in an interoperable way, following the standards stablished by the Open Geospatial Consortium (OGC). By defining standardized service interfaces, these services hides the heterogeneity of the sensor network, its communication details, enabling the access to archived sensor data that can be discovered and accessed using standard protocols and application programming interfaces
LanderPick, a Remote Operated Trawled Vehicle to cost-effectively deploy and recover lightweight oceanographic landers.
Landers are modular structures equipped with miscellaneous sensors and monitoring equipment which are positioned directly on the seabed to operate autonomously for a defined timeframe. A drawback of landers intended to operate for prolonged periods in the deep ocean is the high cost of recovery systems, typically depending on buoyancy modules plus expendable ballast, or requiring ROVs assistance. LanderPick concept consists of the design of a specific trawled vehicle to deploy and recover lightweight oceanographic landers not provided with recovery elements, but having a capture mesh that facilitates their hitching. The LanderPick vehicle is technically a ROTV (Remote Operated Trawled Vehicle) controlled through a standard coaxial electromechanical cable that allows real-time control from the vessel. Navigation is enabled by a low-light high-definition camera, aided by spotlights and laser pointers. Small propellers aid in the final precision approach maneuvers. A mechanical release allows the precise placement at the sea bottom of landers carried as a payload, as well as their recovery by means of a triple hook. First sea missions of the system were carried out successfully in 2021 in southern Biscay. A 4-month deployment of a lander array equipped with current-meters along an energetic canyon axis provided unprecedented detail in the progression of the internal tidal bore. Short (48-hours) deployments of a fully-instrumented lander, including lapse-time image and baits in a deep seamount summit within a marine protected area, provided insights on the biodiversity of a unique ecosystem. The LanderPick novel approach to cost-effectively and precisely deploy and recover lightweight oceanographic landers allows to conceive (i) monitoring systems based on the deployment of arrays or fleets of low-cost landers and (ii) experiments associated with deep habitats such as coral reefs in which it is necessary to locate landers with great precision
LanderPick, a Remote Operated Trawled Vehicle to cost-effectively deploy and recover lightweight oceanographic landers.
Landers are modular structures equipped with miscellaneous sensors and monitoring equipment which are positioned directly on the seabed to operate autonomously for a defined timeframe. A drawback of landers intended to operate for prolonged periods in the deep ocean is the high cost of recovery systems, typically depending on buoyancy modules plus expendable ballast, or requiring ROVs assistance. LanderPick concept consists of the design of a specific trawled vehicle to deploy and recover lightweight oceanographic landers not provided with recovery elements, but having a capture mesh that facilitates their hitching. The LanderPick vehicle is technically a ROTV (Remote Operated Trawled Vehicle) controlled through a standard coaxial electromechanical cable that allows real-time control from the vessel. Navigation is enabled by a low-light high-definition camera, aided by spotlights and laser pointers. Small propellers aid in the final precision approach maneuvers. A mechanical release allows the precise placement at the sea bottom of landers carried as a payload, as well as their recovery by means of a triple hook. First sea missions of the system were carried out successfully in 2021 in southern Biscay. A 4-month deployment of a lander array equipped with current-meters along an energetic canyon axis provided unprecedented detail in the progression of the internal tidal bore. Short (48-hours) deployments of a fully-instrumented lander, including lapse-time image and baits in a deep seamount summit within a marine protected area, provided insights on the biodiversity of a unique ecosystem. The LanderPick novel approach to cost-effectively and precisely deploy and recover lightweight oceanographic landers allows to conceive (i) monitoring systems based on the deployment of arrays or fleets of low-cost landers and (ii) experiments associated with deep habitats such as coral reefs in which it is necessary to locate landers with great precision
Recopilación y elaboración de juegos tradicionales como propuesta didáctica para aplicar en las asignaturas: "educación física en primaria" y "el juego motor y recreación" (Facultad de Educación)
Memoria ID-045. Ayudas de la Universidad de Salamanca para la innovación docente, curso 2013-2014
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