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Subject = Energy budget;
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Displaying Results 1 - 2 of 2 on page 1 of 1
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Energy scavenging for long-term deployable wireless sensor networks
(2007)
Ó Mathúna, S. Cian; O'Donnell, Terence; Martinez-Catala, Rafael V.; Rohan, James F...
Energy scavenging for long-term deployable wireless sensor networks
(2007)
Ó Mathúna, S. Cian; O'Donnell, Terence; Martinez-Catala, Rafael V.; Rohan, James F.; O'Flynn, Brendan
Abstract:
The coming decade will see the rapid emergence of low cost, intelligent, wireless sensors and their widespread deployment throughout our environment. While wearable systems will operate over communications ranges of less than a meter, building management systems will operate with inter-node communications ranges of the order of meters to tens of meters and remote environmental monitoring systems will require communications systems and associated energy systems that will allow reliable operation over kilometers. Autonomous power should allow wireless sensor nodes to operate in a “deploy and forget” mode. The use of rechargeable battery technology is problematic due to battery lifetime issues related to node power budget, battery self-discharge, number of recharge cycles and long-term environmental impact. Duty cycling of wireless sensor nodes with long “SLEEP” times minimises energy usage. A case study of a multi-sensor, wireless, building management system operating using the Zigbee...
http://hdl.handle.net/10468/7658
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The Energy Budget of the Urban Surface: Two Locations in Dublin
(2012)
Keogh, Stephanie; Mills, Gerald; Fealy, Rowan
The Energy Budget of the Urban Surface: Two Locations in Dublin
(2012)
Keogh, Stephanie; Mills, Gerald; Fealy, Rowan
Abstract:
In the first decade of the 21st Century a significant milestone was reached when the urban proportion of the world’s population of 6.6 billion passed 50%. This proportion will increase rapidly in the decades to come as parts of Asia and Africa become progressively less rural and more urban. Although urban areas occupy less than 3% of the planetary landmass, they are the foci of humans and economic activity. The climates that they generate are distinctive and represent unambiguous evidence of the anthropogenic climatic effect. This urban climate effect is a consequence of two related properties, land cover (form) and land use (function). Urbanisation replaces ‘natural’ surfaces with manufactured materials that are usually impervious and have distinctive thermal and radiative properties. In addition, the urban surface is both geometrically complex and highly diverse. These properties of form result in the formation of myriad microclimates caused by a number of climate drivers, includi...
http://mural.maynoothuniversity.ie/5602/
Displaying Results 1 - 2 of 2 on page 1 of 1
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Maynooth University (1)
University College Cork (1)
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2012 (1)
2007 (1)
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