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Message logging is the tool of choice to stay informed about the health of a machine or application. These messages, called logs, are used for various purposes, including system management, performance optimization, investigation of suspicious activities, and more generally analysis and debugging. Operations that demand a level of reliability at least equivalent to the emphasis placed on them during their use. However, the syslog protocol was originally designed to work exclusively over UDP. Traditional applications, which have not benefited from the a postorio additions such as TCP, are forced to communicate over a network that is not suitable for them (corrupted or lost messages, reordering, or unreachable server) and over which they have no control. The objective of this work is to develop a resilient syslog relay that will operate downstream of applications, collect their syslog messages and send them to a central syslog server. Several mechanisms such as the use of the TCP protocol and the retention of messages in case of connection loss guarantee reliability. Topics related to message ordering and strategies in case of an overload are also discussed and several approaches are presented to either mitigate or regulate their impact. The implementation, in the form of a prototype, is deployed inside a router running the Cisco IOx environment and features the modern syslog message engine, rsyslog. The model is evaluated on the basis of its functionality and performance in a test environment with network quality such as 3G cellular and EDGE. Several configurations are proposed depending on the type of usage involved. Although the solution does not cover all possible and imaginable problems, such as router outages, the evaluations demonstrate the efficiency and scalability of the proposed solution, which can for example easily handle several tens of thousands of messages per second with a very low resource footprint.
docker --- cisco --- iox --- syslog --- log --- rsyslog --- aarch64 --- linux --- event --- relay --- reliable --- store and forward --- kibana --- elasticsearch --- message generator --- python --- router --- cellular --- network --- TCP --- UDP --- TLS --- configuration --- ioxclient --- chronological order --- timestamp --- 3G --- EDGE --- performance --- testbed --- wanem --- downtime, --- recover --- permanent storage --- open source --- central server --- server --- low footprint --- Ingénierie, informatique & technologie > Sciences informatiques
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This Special Issue “Characterization of Nanomaterials” collects nine selected papers presented at the 6th Dresden Nanoanalysis Symposium, held at Fraunhofer Institute for Ceramic Technologies and Systems in Dresden, Germany, on 31 August 2018. Following the specific motto of this annual symposium “Materials challenges—Micro- and nanoscale characterization”, it covered various topics of nanoscale materials characterization along the whole value and innovation chain, from fundamental research up to industrial applications. The scope of this Special Issue is to provide an overview of the current status, recent developments and research activities in the field of nanoscale materials characterization, with a particular emphasis on future scenarios. Primarily, analytical techniques for the characterization of thin films and nanostructures are discussed, including modeling and simulation. We anticipate that this Special Issue will be accessible to a wide audience, as it explores not only methodical aspects of nanoscale materials characterization, but also materials synthesis, fabrication of devices and applications.
Technology: general issues --- physical vapor deposition --- magnetron sputtering --- AlN/Al coating --- silicon substrate --- residual stresses --- wafer curvature method --- nanoscale residual stress profiling --- indentation failure modes --- nanoindentation adhesion --- intermetallic phases --- growth kinetics --- Al–Ni system --- zinc oxide --- nanoparticles --- paper transistors --- printed electronics --- electrolyte-gated transistors --- microwave synthesis --- oxide dissociation --- doping --- rare earth ions --- upconversion --- liquid alloys --- 2D materials --- thin films --- Ga–Sn–Zn alloys --- gallium alloys --- nanoanalysis --- lithium-ion --- nickel–manganese–cobalt oxide (NMC) --- leaching --- recycling --- recover --- degradation --- SEM-EDX --- Raman spectroscopy --- resistive switching memories --- multi-level cell --- copper oxide --- grain boundaries --- aluminum oxide --- p-type TFT --- p-type oxide semiconductors --- SnO electrical properties --- oxide structure analysis --- ToF-SIMS 3D imaging --- compositional depth profiling --- high aspect ratio (HAR) structures --- silicon doped hafnium oxide (HSO) ALD deposition --- lateral high aspect ratio (LHAR) --- ToF-SIMS analysis --- n/a --- Al-Ni system --- Ga-Sn-Zn alloys --- nickel-manganese-cobalt oxide (NMC)
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This Special Issue “Characterization of Nanomaterials” collects nine selected papers presented at the 6th Dresden Nanoanalysis Symposium, held at Fraunhofer Institute for Ceramic Technologies and Systems in Dresden, Germany, on 31 August 2018. Following the specific motto of this annual symposium “Materials challenges—Micro- and nanoscale characterization”, it covered various topics of nanoscale materials characterization along the whole value and innovation chain, from fundamental research up to industrial applications. The scope of this Special Issue is to provide an overview of the current status, recent developments and research activities in the field of nanoscale materials characterization, with a particular emphasis on future scenarios. Primarily, analytical techniques for the characterization of thin films and nanostructures are discussed, including modeling and simulation. We anticipate that this Special Issue will be accessible to a wide audience, as it explores not only methodical aspects of nanoscale materials characterization, but also materials synthesis, fabrication of devices and applications.
physical vapor deposition --- magnetron sputtering --- AlN/Al coating --- silicon substrate --- residual stresses --- wafer curvature method --- nanoscale residual stress profiling --- indentation failure modes --- nanoindentation adhesion --- intermetallic phases --- growth kinetics --- Al–Ni system --- zinc oxide --- nanoparticles --- paper transistors --- printed electronics --- electrolyte-gated transistors --- microwave synthesis --- oxide dissociation --- doping --- rare earth ions --- upconversion --- liquid alloys --- 2D materials --- thin films --- Ga–Sn–Zn alloys --- gallium alloys --- nanoanalysis --- lithium-ion --- nickel–manganese–cobalt oxide (NMC) --- leaching --- recycling --- recover --- degradation --- SEM-EDX --- Raman spectroscopy --- resistive switching memories --- multi-level cell --- copper oxide --- grain boundaries --- aluminum oxide --- p-type TFT --- p-type oxide semiconductors --- SnO electrical properties --- oxide structure analysis --- ToF-SIMS 3D imaging --- compositional depth profiling --- high aspect ratio (HAR) structures --- silicon doped hafnium oxide (HSO) ALD deposition --- lateral high aspect ratio (LHAR) --- ToF-SIMS analysis --- n/a --- Al-Ni system --- Ga-Sn-Zn alloys --- nickel-manganese-cobalt oxide (NMC)
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This Special Issue “Characterization of Nanomaterials” collects nine selected papers presented at the 6th Dresden Nanoanalysis Symposium, held at Fraunhofer Institute for Ceramic Technologies and Systems in Dresden, Germany, on 31 August 2018. Following the specific motto of this annual symposium “Materials challenges—Micro- and nanoscale characterization”, it covered various topics of nanoscale materials characterization along the whole value and innovation chain, from fundamental research up to industrial applications. The scope of this Special Issue is to provide an overview of the current status, recent developments and research activities in the field of nanoscale materials characterization, with a particular emphasis on future scenarios. Primarily, analytical techniques for the characterization of thin films and nanostructures are discussed, including modeling and simulation. We anticipate that this Special Issue will be accessible to a wide audience, as it explores not only methodical aspects of nanoscale materials characterization, but also materials synthesis, fabrication of devices and applications.
Technology: general issues --- physical vapor deposition --- magnetron sputtering --- AlN/Al coating --- silicon substrate --- residual stresses --- wafer curvature method --- nanoscale residual stress profiling --- indentation failure modes --- nanoindentation adhesion --- intermetallic phases --- growth kinetics --- Al-Ni system --- zinc oxide --- nanoparticles --- paper transistors --- printed electronics --- electrolyte-gated transistors --- microwave synthesis --- oxide dissociation --- doping --- rare earth ions --- upconversion --- liquid alloys --- 2D materials --- thin films --- Ga-Sn-Zn alloys --- gallium alloys --- nanoanalysis --- lithium-ion --- nickel-manganese-cobalt oxide (NMC) --- leaching --- recycling --- recover --- degradation --- SEM-EDX --- Raman spectroscopy --- resistive switching memories --- multi-level cell --- copper oxide --- grain boundaries --- aluminum oxide --- p-type TFT --- p-type oxide semiconductors --- SnO electrical properties --- oxide structure analysis --- ToF-SIMS 3D imaging --- compositional depth profiling --- high aspect ratio (HAR) structures --- silicon doped hafnium oxide (HSO) ALD deposition --- lateral high aspect ratio (LHAR) --- ToF-SIMS analysis --- physical vapor deposition --- magnetron sputtering --- AlN/Al coating --- silicon substrate --- residual stresses --- wafer curvature method --- nanoscale residual stress profiling --- indentation failure modes --- nanoindentation adhesion --- intermetallic phases --- growth kinetics --- Al-Ni system --- zinc oxide --- nanoparticles --- paper transistors --- printed electronics --- electrolyte-gated transistors --- microwave synthesis --- oxide dissociation --- doping --- rare earth ions --- upconversion --- liquid alloys --- 2D materials --- thin films --- Ga-Sn-Zn alloys --- gallium alloys --- nanoanalysis --- lithium-ion --- nickel-manganese-cobalt oxide (NMC) --- leaching --- recycling --- recover --- degradation --- SEM-EDX --- Raman spectroscopy --- resistive switching memories --- multi-level cell --- copper oxide --- grain boundaries --- aluminum oxide --- p-type TFT --- p-type oxide semiconductors --- SnO electrical properties --- oxide structure analysis --- ToF-SIMS 3D imaging --- compositional depth profiling --- high aspect ratio (HAR) structures --- silicon doped hafnium oxide (HSO) ALD deposition --- lateral high aspect ratio (LHAR) --- ToF-SIMS analysis
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