A signaling architecture for multimedia MBS over WiMAX

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The Hierarchic treatment of marine ecological information from spatial networks of benthic platforms

Measuring biodiversity simultaneously in different locations, at different temporal scales, and over wide spatial scales is of strategic importance for the improvement of our understanding of the functioning of marine ecosystems and for the conservation of their biodiversity. Monitoring networks of cabled observatories, along with other docked autonomous systems (e.g., Remotely Operated Vehicles [ROVs], Autonomous Underwater Vehicles [AUVs], and crawlers), are being conceived and established at a spatial scale capable of tracking energy fluxes across benthic and pelagic compartments, as well as across geographic ecotones. At the same time, optoacoustic imaging is sustaining an unprecedented expansion in marine ecological monitoring, enabling the acquisition of new biological and environmental data at an appropriate spatiotemporal scale. At this stage, one of the main problems for an effective application of these technologies is the processing, storage, and treatment of the acquired complex ecological information. Here, we provide a conceptual overview on the technological developments in the multiparametric generation, storage, and automated hierarchic treatment of biological and environmental information required to capture the spatiotemporal complexity of a marine ecosystem. In doing so, we present a pipeline of ecological data acquisition and processing in different steps and prone to automation. We also give an example of population biomass, community richness and biodiversity data computation (as indicators for ecosystem functionality) with an Internet Operated Vehicle (a mobile crawler). Finally, we discuss the software requirements for that automated data processing at the level of cyber-infrastructures with sensor calibration and control, data banking, and ingestion into large data portals.Peer ReviewedPostprint (published version

NetServ: Reviving Active Networks

In 1996, Tennenhouse and Wetherall proposed active networks, where users can inject code modules into network nodes. The proposal sparked intense debate and follow-on research, but ultimately failed to win over the networking community. Fifteen years later, the problems that motivated the active networks proposal persist. We call for a revival of active networks. We present NetServ, a fully integrated active network system that provides all the necessary functionality to be deployable, addressing the core problems that prevented the practical success of earlier approaches. We make the following contributions. We present a hybrid approach to active networking, which combines the best qualities from the two extreme approaches — integrated and discrete. We built a working system that strikes the right balance between security and performance by leveraging current technologies. We suggest an economic model based on NetServ between content providers and ISPs. We built four applications to illustrate the model

NetServ Framework Design and Implementation 1.0

Eyeball ISPs today are under-utilizing an important asset: edge routers. We present NetServ, a programmable node architecture aimed at turning edge routers into distributed service hosting platforms. This allows ISPs to allocate router resources to content publishers and application service pro\-vi\-ders motivated to deploy content and services at the network edge. This model provides important benefits over currently available solutions like CDN. Content and services can be brought closer to end users by dynamically installing and removing custom modules as needed throughout the network. Unlike previous programmable router proposals which focused on customizing features of a router, NetServ focuses on deploying content and services. All our design decisions reflect this change in focus. We set three main design goals: a wide-area deployment, a multi-user execution environment, and a clear economic benefit. We built a prototype using Linux, NSIS signaling, and the Java OSGi framework. We also implemented four prototype applications: ActiveCDN provides publisher-specific content distribution and processing; KeepAlive Responder and Media Relay reduce the infrastructure needs of telephony providers; and Overload Control makes it possible to deploy more flexible algorithms to handle excessive traffic

Deep-sea litter in the Gulf of Cadiz (Northeastern Atlantic, Spain)

This study describes the distribution and composition of litter from the Gulf of Cadiz (Northeastern Atlantic, Spain), a region of confluence between the Atlantic and Mediterranean, with intense maritime traffic. Several geological features, such as canyons, open slopes and contourite furrows and channels, were surveyed by remotely operated vehicle (ROV) observations between depths of 220 and 1000 m. Marine litter was quantified by grouping the observations into six categories. Our results indicate the presence of markedly different habitats in which a complex collection of different types of litter accumulate in relation to bottom current flows and maritime and fishing routes. This result justifies a seascape approach in further anthropogenic impact studies within deep-sea areas.Postprint (author's final draft

The potential of video imagery from worldwide cabled observatory networks to provide information supporting fish-stock and biodiversity assessment

Seafloor multiparametric fibre-optic-cabled video observatories are emerging tools for standardized monitoring programmes, dedicated to the production of real-time fishery-independent stock assessment data. Here, we propose that a network of cabled cameras can be set up and optimized to ensure representative long-term monitoring of target commercial species and their surrounding habitats. We highlight the importance of adding the spatial dimension to fixed-point-cabled monitoring networks, and the need for close integration with Artificial Intelligence pipelines, that are necessary for fast and reliable biological data processing. We then describe two pilot studies, exemplary of using video imagery and environmental monitoring to derive robust data as a foundation for future ecosystem-based fish-stock and biodiversity management. The first example is from the NE Pacific Ocean where the deep-water sablefish (Anoplopoma fimbria) has been monitored since 2010 by the NEPTUNE cabled observatory operated by Ocean Networks Canada. The second example is from the NE Atlantic Ocean where the Norway lobster (Nephrops norvegicus) is being monitored using the SmartBay observatory developed for the European Multidisciplinary Seafloor and water column Observatories. Drawing from these two examples, we provide insights into the technological challenges and future steps required to develop full-scale fishery-independent stock assessments.This work was funded by the following project activities: ARIM (Autonomous Robotic sea-floor Infrastructure for benthopelagic Monitoring; MartTERA ERA-Net Cofound), ARCHES (Autonomous Robotic Networks to Help Modern Societies; German Helmholtz Association), RESBIO (TEC2017-87861-R; Ministerio de Ciencia, Innovación y Universidades, Spanish Government), RESNEP (CTM2017-82991-C2-1-R; Ministerio de Ciencia, Innovación y Universidades, Spanish Government), and SmartLobster (EMSO-LINK Trans National Access-TNA). The EMSO_SmartBay cabled observatory was funded by Science Foundation Ireland (SFI) as part of a SFI Research Infrastructure Award Grant No. 12/RI/2331.Peer ReviewedPostprint (author's final draft

Adaptación del tulipán a zonas de inviernos templados de Argentina

Para determinar la adaptación del tulipán a zonas de inviernos templados de Argentina y definir períodos de producción apropiados, durante 2004, en San Pedro (provincia de Buenos Aires), se evaluaron Ile de France (destino planta en maceta) y Yokohama (destino flor de corte o macizo floral). Para seis fechas de implantación (23 de junio a 28 de julio, intervalos semanales) se registraron duración del período vegetativo (PV) y de la floración (F), altura de la planta al inicio de la F y largo del tallo al final del ciclo. Se hizo la regresión entre estas variables y las temperaturas del aire, las que variaron entre 13 y 18º C. Ile de France: el atraso de la plantación provocó acortamientos del PV (43 a 30 días) y de la F (23 a 16 días) y alargamiento del tallo (46 a 54 cm). Las temperaturas medias del aire del PV y de la F explicaron el 73% de la variabilidad en la duración del ciclo y sólo el 21% de la del largo del tallo. Yokohama: el atraso de la plantación provocó acortamientos del PV (49 a 32 días) y de la F (25 a 18 días) y alargamiento del tallo (35 a 42 cm). Las temperaturas medias del aire del PV y de la F explicaron el 61% de la variabilidad en la duración del ciclo y el 33% de la del largo del tallo. Se concluye que para el período de implantación 23 de junio a 28 de julio ambos híbridos se desarrollaron normalmente, completando la floración sin defectos de calidad. //// Tulip adaptation to mild winter areas of Argentina This experiment was undertaken to determine tulip adaptation to mild winter areas of Argentina and to define the best production period. Two hybrids, Ile de France (for potting systems), and Yokohama (for cut flower or bed systems) were evaluated in 2004 at San Pedro, Buenos Aires province. Bulbs were planted on six dates at weekly intervals between June 23rd and July 28th. The vegetative (PV) and flowering (F) periods, plant height at the beginning of F, and stem length at the end of the cycle were recorded. These records were regressed on temperature variables. Air temperature ranged from 13 to 18°C. For Ile de France, delaying the planting date caused a shortening of PV (43 to 30 days) and F (23 to 16 days), and an increase in stem length at the end of the cycle (46 to 54 cm). Mean air temperature during the PV and F explained 73% of the variability in cycle length and only 21% of that of stem length. For Yokohama, delaying the planting date caused a shortening of PV (49 to 32 days) and F (25 to 18 days), and an increase in stem length at the end of the cycle (35 to 42 cm). Mean air temperature during the PV and F explained 61% of the variability in cycle length and 33% of that of stem length. We conclude that both hybrids will produce good flower quality when planted between June 23rd and July 28th.EEA San PedroFil: Francescangeli, Nora. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria San Pedro; ArgentinaFil: Frangi, Pablo C. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria San Pedro. Agencia de Extensión Rural Gran Buenos Aires; ArgentinaFil: Fernández, Roberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria San Pedro. Agencia de Extensión Rural Gran Buenos Aires; Argentin

Adaptación del tulipán a zonas de inviernos templados de Argentina

Para determinar la adaptación del tulipán a zonas de inviernos templados de Argentina y definir períodos de producción apropiados, durante 2004, en San Pedro (provincia de Buenos Aires), se evaluaron Ile de France (destino planta en maceta) y Yokohama (destino flor de corte o macizo floral). Para seis fechas de implantación (23 de junio a 28 de julio, intervalos semanales) se registraron duración del período vegetativo (PV) y de la floración (F), altura de la planta al inicio de la F y largo del tallo al final del ciclo. Se hizo la regresión entre estas variables y las temperaturas del aire, las que variaron entre 13 y 18º C. Ile de France: el atraso de la plantación provocó acortamientos del PV (43 a 30 días) y de la F (23 a 16 días) y alargamiento del tallo (46 a 54 cm). Las temperaturas medias del aire del PV y de la F explicaron el 73% de la variabilidad en la duración del ciclo y sólo el 21% de la del largo del tallo. Yokohama: el atraso de la plantación provocó acortamientos del PV (49 a 32 días) y de la F (25 a 18 días) y alargamiento del tallo (35 a 42 cm). Las temperaturas medias del aire del PV y de la F explicaron el 61% de la variabilidad en la duración del ciclo y el 33% de la del largo del tallo. Se concluye que para el período de implantación 23 de junio a 28 de julio ambos híbridos se desarrollaron normalmente, completando la floración sin defectos de calidad. //// Tulip adaptation to mild winter areas of Argentina This experiment was undertaken to determine tulip adaptation to mild winter areas of Argentina and to define the best production period. Two hybrids, Ile de France (for potting systems), and Yokohama (for cut flower or bed systems) were evaluated in 2004 at San Pedro, Buenos Aires province. Bulbs were planted on six dates at weekly intervals between June 23rd and July 28th. The vegetative (PV) and flowering (F) periods, plant height at the beginning of F, and stem length at the end of the cycle were recorded. These records were regressed on temperature variables. Air temperature ranged from 13 to 18°C. For Ile de France, delaying the planting date caused a shortening of PV (43 to 30 days) and F (23 to 16 days), and an increase in stem length at the end of the cycle (46 to 54 cm). Mean air temperature during the PV and F explained 73% of the variability in cycle length and only 21% of that of stem length. For Yokohama, delaying the planting date caused a shortening of PV (49 to 32 days) and F (25 to 18 days), and an increase in stem length at the end of the cycle (35 to 42 cm). Mean air temperature during the PV and F explained 61% of the variability in cycle length and 33% of that of stem length. We conclude that both hybrids will produce good flower quality when planted between June 23rd and July 28th.EEA San PedroFil: Francescangeli, Nora. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria San Pedro; ArgentinaFil: Frangi, Pablo C. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria San Pedro. Agencia de Extensión Rural Gran Buenos Aires; ArgentinaFil: Fernández, Roberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria San Pedro. Agencia de Extensión Rural Gran Buenos Aires; Argentin

Adaptación del tulipán a las temperaturas del norte de la provincia de Buenos Aires, Argentina

Con el propósito de proveer información sobre manejo del cultivo y contribuir a promover el aumento de la apreciación y de la demanda de la especie, el presente trabajo tuvo como objetivo determinar la adaptación del tulipán a las temperaturas de la zona norte de la provincia de Buenos Aires y definir períodos de implantación apropiados.EEA San PedroFil: Francescangeli, Nora. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria San Pedro; ArgentinaFil: Frangi, Pablo C. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria San Pedro. Agencia de Extensión Rural Gran Buenos Aires; ArgentinaFil: Fernández, Roberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria San Pedro. Agencia de Extensión Rural Gran Buenos Aires; Argentin