Search results for " Data Center"

showing 5 items of 5 documents

Paesaggi digitali: le manifestazioni spaziali delle tecnologie dell’informazione e della comunicazione

2020

The paper aims to investigate the evolution of the relationship between digital technologies and physical reality, through observing the main spatial manifestations of digital information and communication technologies. In the last decades, the flow of digital information began to materialize itself in a very physical infrastructure made of transcontinental cables and data centers. The analysis revealed the growing environmental and geopolitical implications of digital technologies.

ICT Submarine Cables Data CenterSettore ICAR/21 - Urbanistica
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The SMAP and Copernicus Sentinel 1A/B microwave active-passive high resolution surface soil moisture product

2019

Abstract Soil Moisture Active Passive (SMAP) mission of NASA was launched in January 2015. Currently, SMAP has an L-band radiometer and a defunct L-band radar with a rotating 6-m mesh reflector antenna. On July 7th, 2015, the SMAP radar malfunctioned and became inoperable. Consequently, the production of high-resolution active-passive soil moisture product got hampered, and only ~2.5 months (April 15th, 2015 to July 7th, 2015) of data remain available. Therefore, during the SMAP post-radar phase, many ways were examined to restart the high-resolution soil moisture product generation of the SMAP mission. One of the feasible approaches was to substitute the SMAP radar with other available SAR…

National Snow and Ice Data Center010504 meteorology & atmospheric sciences0208 environmental biotechnologySoil Science02 engineering and technology01 natural scienceslaw.inventionlawCalibrationComputers in Earth SciencesRadarImage resolution0105 earth and related environmental sciencesRemote sensingRadiometeractive-passiveGeologySMAPradiometer020801 environmental engineeringBrightness temperatureTemporal resolutionEnvironmental sciencesoil moistureMicrowaveSARRemote Sensing of Environment
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The SMAP mission combined active-passive soil moisture product at 9 km and 3 km spatial resolutions

2018

Abstract The NASA Soil Moisture Active Passive (SMAP) mission was launched on January 31st, 2015. The spacecraft was to provide high-resolution (3 km and 9 km) global soil moisture estimates at regular intervals by combining for the first time L-band radiometer and radar observations. On July 7th, 2015, a component of the SMAP radar failed and the radar ceased operation. However, before this occurred the mission was able to collect and process ~2.5 months of the SMAP high-resolution active-passive soil moisture data (L2SMAP) that coincided with the Northern Hemisphere's vegetation green-up and crop growth season. In this study, we evaluate the SMAP high-resolution soil moisture product deri…

National Snow and Ice Data CenterRadiometer010504 meteorology & atmospheric sciences0211 other engineering and technologiesNorthern HemisphereSoil ScienceGeology02 engineering and technologyVegetation01 natural sciencesActive passivelaw.inventionlawEnvironmental scienceProduct (category theory)Computers in Earth SciencesRadarWater content021101 geological & geomatics engineering0105 earth and related environmental sciencesRemote sensingRemote Sensing of Environment
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Combined IT and power supply infrastructure sizing for standalone green data centers

2021

International audience; In this work, we propose a two-step methodology for designing and sizing a data center solely powered by local renewable energy. The first step consists in determining the necessary IT equipment for processing a given IT workload composed of batch and service tasks. We propose an adapted binary search algorithm and prove its optimality to find the minimum number of servers to handle the IT workload. When the IT sizing is computed, the second step consists in defining the supplying electrical infrastructure using wind turbines and photovoltaic panels as primary sources. Batteries and a hydrogen system are added as secondary sources for short- and long-term energy stor…

Renewable energyBinary search algorithmWind powerGeneral Computer Sciencebusiness.industryComputer scienceInfrastructure sizing020209 energyReal-time computingPhotovoltaic systemSustainable Computing: Informatics and Systems Renewable energy020206 networking & telecommunicationsWorkload02 engineering and technology7. Clean energyGreen data centerSizingEnergy storageServer0202 electrical engineering electronic engineering information engineeringData center[INFO.INFO-OS]Computer Science [cs]/Operating Systems [cs.OS][INFO.INFO-DC]Computer Science [cs]/Distributed Parallel and Cluster Computing [cs.DC]Electrical and Electronic EngineeringbusinessSustainable Computing: Informatics and Systems
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A survey of wireless data center networks

2015

Data centers are becoming more and more popular for a wide variety of applications. However, the efficiency of data centers are restricted by many issues like cabling and maintenance problems in addition to performance problems like oversubscription. Wireless technology was proposed as it has the capability and the flexibility to offer feasible approaches to solve some of these problems. In this paper, we conduct a deep investigation about wireless data center networks, describe some works that enhance the performance of the network, then give some remarks and critiques. 2015 IEEE. Scopus

Wi-Fi arrayWireless networkbusiness.industryComputer scienceDistributed computingWireless WANData center networkWireless data center networkKey distribution in wireless sensor networksWireless site survey60Ghz technologybusinessFixed wirelessWireless sensor networkMunicipal wireless networkComputer network2015 49th Annual Conference on Information Sciences and Systems (CISS)
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