Results 41 to 50 of about 31,564 (295)

Revisiting paravertebral muscles in European rabbits (Oryctolagus cuniculus) and European brown hares (Lepus europaeus) (Leporidae; Lagomorpha)

The Anatomical Record, EarlyView.
Abstract Domesticated European rabbits (Oryctolagus cuniculus) have long been chosen as laboratory model organisms. Despite this, there has been no definitive study of the vertebral musculature of wild rabbits. Relevant descriptions of well‐studied veterinary model mammals (such as dogs) are generally applicable, but not appropriate for a species ...
Nuttakorn Taewcharoen, Emma Sherratt, Philip Stott, Rachel Norris   +3 more
wiley   +1 more source

Impact Analysis of Pipe Jacking Crossing and Parallel Construction on Existing Metro Shield Tunnels

Chengshi guidao jiaotong yanjiu
［Objective］ In underground excavation projects, the working conditions of tunnels crossing each other are becoming increasingly frequent and complex. It is therefore imperative to investigate their interactions and mutual impact mechanisms to control ...
HUANG Jianhua, YUAN Xiaoyu, ZHANG Jiankun   +2 more
doaj   +1 more source

Carnage Interrupted: An Analysis of Fifteen Terrorist Plots against Public Surface Transportation, Research Report 11-20 [PDF]

, 2012
This report examines 13 terrorist plots against public surface transportation that were uncovered and foiled by authorities between 1997 and 2010 and two failed attempts to carry out attacks.
Jenkins, Brian M., Trella, Joseph
core   +1 more source

An integrated wind risk warning model for urban rail transport in Shanghai, China [PDF]

, 2020
The integrated wind risk warning model for rail transport presented has four elements: Background wind data, a wind field model, a vulnerability model, and a risk model. Background wind data uses observations in this study. Using the wind field model
Grimmond, C. S. B., Han, Z., Ma, B., Tan, J., Weng, C., Yang, T.   +5 more
core   +1 more source

Subterranean environments contribute to three‐quarters of classified ecosystem services

Biological Reviews, EarlyView.
ABSTRACT Beneath the Earth's surface lies a network of interconnected caves, voids, and systems of fissures forming in rocks of sedimentary, igneous, or metamorphic origin. Although largely inaccessible to humans, this hidden realm supports and regulates services critical to ecological health and human well‐being.
Stefano Mammola, David Brankovits, Tiziana Di Lorenzo, Isabel R. Amorim, Raluca Ioana Bancila, Adrià Bellvert, Enrico Bernard, Anna Blomberg, Paulo A.V. Borges, Martina Cappelletti, Rodrigo Lopes Ferreira, Rosalina Gabriel, Diana M. P. Galassi, Laura Garzoli, Vasilis Gerovasileiou, Grant C. Hose, Kathryn L. Korbel, Simone Martino, Ana Z Miller, Nataša Mori, Veronica Nanni, Giuseppe Nicolosi, Mattia Saccò, Troy S. Sakihara, Marconi Souza Silva, Anne E. Tamalavage, Maja Zagmajster, Efraín Chávez, Christian Griebler, Pedro Cardoso, Alejandro Martínez   +30 more
wiley   +1 more source

Protective Measures for a Tunnel on Xi’an Metro Line 6 Crossing Ground Fissure Zone

Chengshi guidao jiaotong yanjiu
Objective Xi’an Metro Line 6 Phase Ⅱ project encounters seven ground fissures along one of its tunnels, the poor engineering properties may cause partial tunnel collapse and uneven settlement at the base, exacerbating ground fissure activities and posing
HU Ziquan, SHA Ming, HU Yinlin, YAO Changchun, RUI Jiang   +4 more
doaj   +1 more source

Evaluation of train-induced settlement for metro tunnel in saturated clay based on an elastoplastic constitutive model

Underground Space, 2018
In this study, a two-dimensional (2D) soil–water coupling dynamic finite element (FE) analysis is conducted to investigate the effect of repeated train vibrations on the long-term settlement of a metro tunnel in saturated clay.
Qiang Huang, Hongwei Huang, Bin Ye, Dongmei Zhang, Feng Zhang   +4 more
doaj   +1 more source

Dynamic Responses of Soils around a One-Hole Double-Track Tunnel with the Metro Train Meeting

Shock and Vibration, 2020
The single-hole double-track shield tunnel with a large diameter has been one of the optimized schemes for those Metro meeting tunnels crossing long water areas. Compared with single-hole single-track tunnels, train-meeting scenarios occur in single-hole
Bo Pan, Wei Zhang, Jianqiu Cao, Xueyong Ma, Mingliang Zhou   +4 more
doaj   +1 more source

TBM pressure models: calculation tools [PDF]

, 2015
Mechanized tunnel construction in soft ground has evolved significantly over the last 20 years, especially on the matter of settlement control. This was achieved by guiding the TBM operation to control the main factors that induce soil displacements ...
Bezuijen, Adam, Gerheim Souza Dias, Tiago   +1 more
core   +1 more source

Blasting effects of cross‐fault deep‐buried excavation on adjacent existing tunnel stability

Deep Underground Science and Engineering, EarlyView.
Based on the theoretical analysis of cylindrical wave propagation in a deep rock mass in the fault with a filling layer, the calculation method of peak particle velocity caused by wave propagation in the existing tunnel is established. The viscoelastic characteristics of a rock mass are examined in the analysis.
Shaobo Chai, Lianzeng Chai, Chao Meng, Kai Liu, Lang Song, Shaojie Zheng   +5 more
wiley   +1 more source