منابع مشابه
The London Underground: dust and hazards to health.
AIMS To assess hazards associated with exposure to dust in the London Underground railway and to provide an informed opinion on the risks to workers and the travelling public of exposure to tunnel dust. METHODS Concentrations of dust, as mass (PM2.5) and particle number, were measured at different underground stations and in train cabs; its size and composition were analysed; likely maximal e...
متن کاملThe Use of Computer Assisted Radar Tomography for Damage Prevention of Underground Assets and Avoidance of Underground Hazards
The lack of accurate maps of subsurface utilities and other underground hazards often causes accidents, project delays and increased project cost. Subsurface Utility Engineering (SUE) is an engineering process utilizing state-of-the-art technology to accurately identify, characterize, and map underground utilities and installations prior to the design of new highways and structures or the insta...
متن کاملHazards to Small Mammals Associated with Underground Strychnine Baiting for Pocket Gophers
Damage to conifer seedlings by pocket gophers (Thomomys spp.) is a major factor limiting reforestation in the western United States. To control gopher populations and reduce damage, the U.S. Forest Service annually treats thousands of hectares with strychnine alkaloid bait. Because an underground application of strychnine bait could pose a threat to other species, we monitored small mammal popu...
متن کاملEmpirical Evaluation of Wireless Underground-to-Underground Communication in Wireless Underground Sensor Networks
Many applications for irrigation management and environment monitoring exploit buried sensors wired-connected to the soil surface for information retrieval. Wireless Underground Sensor Networks (WUSNs) is an emerging area of research that promises to provide communication capabilities to these sensors. To accomplish this, a reliable wireless underground communication channel is necessary, allow...
متن کاملCharacteristics of Underground Channel for Wireless Underground Sensor Networks
Wireless Underground Sensor Networks (WUSN) constitute one of the promising application areas of the recently developed wireless sensor networking techniques. The main difference between WUSN and the terrestrial wireless sensor networks is the communication medium. The propagation characteristics of electromagnetic (EM) waves in soil and the significant differences between propagation in air pr...
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ژورنال
عنوان ژورنال: Nature Energy
سال: 2020
ISSN: 2058-7546
DOI: 10.1038/s41560-020-0643-4