نتایج جستجو برای: underground space

تعداد نتایج: 507944  

Journal: :Resources Policy 2021

During the last two decades enhanced multiple use of underground resources and space led to a growing number issues which current European Union (EU) and/or its Member States (MS) national legal regulatory frameworks knowledge bases are not able manage efficiently, from sustainable development perspective. With focus on Europe, this study is horizon scanning review raise awareness situation hig...

Journal: :E3S web of conferences 2021

This paper mainly studies the behavior of axisymmetric radial interaction between soil and structure under stress. Considering possible factors in interaction, such as arching effect caused by finite curvature, a simplified model is established. The influence curvature change on stress field, strain displacement field stress-strain relationship analyzed. Finally, status various their changes ar...

2006
Stylianos Basagiannis Panagiotis Katsaros Andrew Pombortsis

Control systems are required to comply with certain safety and liveness correctness properties. In most cases, such systems have an intrinsic degree of complexity and it is not easy to formally analyze them, due to the resulting large state space. Also, exhaustive simulation and testing can easily miss system errors, whether they are life-critical or not. In this work, we introduce an interlock...

Journal: :CoRR 2015
Xin Tan Zhi Sun Ian F. Akyildiz

Wireless underground sensor networks (WUSNs) can enable many important applications such as intelligent agriculture, pipeline fault diagnosis, mine disaster rescue, concealed border patrol, crude oil exploration, among others. The key challenge to realize WUSNs is the wireless communication in underground environments. Most existing wireless communication systems utilize the dipole antenna to t...

2015
Sangmin Kim Jeonghyun Kim Jaehoon Jung Joon Heo

The cadastral system provides land ownership information by registering and representing land boundaries on a map. The current cadastral system in Korea, however, focuses mainly on the management of 2D land-surface boundaries. It is not yet possible to provide efficient or reliable land administration, as this 2D system cannot support or manage land information on 3D properties (including archi...

2013
Matthew Loxham Matthew J. Cooper Miriam E. Gerlofs-Nijland Flemming R. Cassee Donna E. Davies Martin R. Palmer Damon A. H. Teagle

Underground railway stations are known to have elevated particulate matter (PM) loads compared to ambient air. As these particles are derived from metal-rich sources and transition metals may pose a risk to health by virtue of their ability to catalyze generation of reactive oxygen species (ROS), their potential enrichment in underground environments is a source of concern. Compared to coarse (...

Journal: :Wireless Communications and Mobile Computing 2013
Adel Ali Ahmed Norsheila Fisal

A wireless underground sensor network (WUSN) is defined as a network of wireless sensor devices in which all sensor devices are deployed completely underground (network sinks or any devices specifically for relay between sensors and a sink may be aboveground). In hybrid wireless underground sensor network (HWUSN), communication between nodes is implemented from underground-to-air or air-to-unde...

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