Microbiological activity is a general term which includes all metabolic reactions and interactions of the soil microflora and macrofauna.1 Soil microorganisms contribute to soil fertility and aggregate formation in degraded soils.2 However, it is only during the last decades that ecologists have beginning to explore the underground communities and their functional significance for the plant com...

Incipient faults usually emerge from partial discharges which eventually cause insulation degradation between two insulated cable cores. Early detection of incipient faults is of particular importance because insulation defects caused by incipient faults may lead to permanent faults in underground distribution networks. This paper presents a novel approach using S-transform and support vector r...

Abstract Gravitational-wave now became one of the important observational methods for studying Universe since its first detection. However, ground-based observatories have an inherent barrier to their detection frequency band due seismic and gravity gradient noises nearby perturbation surroundings. A recent intriguing development artificial structures media called metamaterial is opening a new ...

Through core CT analysis and cyclic reaction simulation experiment, the filling characteristics of structural fractures are analyzed, mechanism is revealed in this paper. The results show that fracture degree has obvious inverse correlation with length, maximum opening, absolute linear density, inclination fractures, which indicates poor connectivity more likely to be filled. Within networks, m...

This research project attempts to understand the complex information interactions between musicians, promoters, and audience members who perform/promote/transform residential basements into underground music venues. The goals of this project are (1) to obtain an understanding of the informationseeking practices that enable social actors to participate in an underground music scene, (2) to ident...

This paper is based on the open pit to underground mining practice of Daye Iron Mine. The influence mechanism between high-steep slope and non-pillar sublevel caving method is studied by using physical model test. Firstly, engineering geological properties of the choosing typical research section is analysed and generalized. Secondly, the system of open pit to underground mining is developing a...

A vulnerability analysis of possible use in security studies is presented. The analysis of the London underground network suggests that the stations bombed on 7 July, 2005 may not have been chosen randomly. From the viewpoint of effectively disturbing the transport system, nearly the best choice was made out of roughly 3 million possible combinations for attacking three stations. By comparing t...

Designing a proper acoustical environment--indispensable to speech recognition--in long enclosures is difficult. Although there is some literature on the acoustical conditions in underground stations, there is still little information about methods that make estimation of correct reverberation conditions possible. This paper discusses the assessment of the reverberation conditions of undergroun...

Underground vehicular ad-hoc networks are indorsing wireless networks because they can realize many goals such as improving the driving safety and monitoring the emergency alerts in underground environments (i.e., road tunnels). It is necessary for vehicular nodes to recognize their positions to achieve these goals. However, Global Positioning System (GPS) devices cannot operate in underground ...