نتایج جستجو برای: tunnel pollutant

تعداد نتایج: 55829  

Journal: :Plastic and reconstructive surgery 1998
K C Chung M R Walters M L Greenfield M E Chernew

Endoscopic carpal tunnel release is a controversial procedure used in the treatment of carpal tunnel syndrome. Although endoscopic carpal tunnel release is associated with less incisional pain and faster recovery time than the open carpal tunnel release, opponents of endoscopic carpal tunnel release suggest that its benefits are outweighed by its higher complication rates from median nerve tran...

Journal: :journal of mining and environment 2012
m. ataei s.r. torabi b. alizadeh sevary

qomroud water conveyance tunnel (lot 1&2) with the length of 16 kilometers is considered as one of the greatest development and national projects in iran. since about 2 kilometers of tunnel pass through alluvium and the rest of the tunnel pass through various types of geological units, and due to the complexity of geological condition and variety of effective criteria, suitable selection of...

2014
M. Azadi M. Kalhor

Excavation of shallow tunnels such as subways in urban areas plays a significant role as a life line and investigation of the soil behavior against tunnel construction is one of the vital subjects studied in the geotechnical scope. Nowadays, urban tunnels are mostly drilled by T.B.Ms and changing the applied forces to tunnel lining is one of the most risky matters while drilling tunnels by thes...

2007
Alina Chertock Eugene Kashdan Alexander Kurganov

We present a hybrid numerical method for computing the propagation of a diffusing passive pollutant in shallow water. The flow is modeled by the SaintVenant system of shallow water equations and the pollutant propagation is described by a convection-diffusion equation. In this paper, we extend the hybrid finite-volume-particle (FVP) method, which was originally introduced in [CK04, CKP06] for t...

2010
Bao-shan Zhang Xiao-ling Yuan Yang Yang Hsiang-Chun Michael Lin

This study investigates the relationships among pollutant emissions, energy consumption and economic development in China during the period 1982-2007 by using one-step GMM-system model under multivariable panel VAR framework, controlling for capital stock and labor force. Regarding the data for all 28 provinces as a whole, we find that there is a unidirectional positive relationship running fro...

Journal: :Fish & shellfish immunology 2004
B Gagnaire H Thomas-Guyon T Renault

In the past decades, shellfish culture has developed in a significant way around the world. However, culture areas are often subject to recurring anthropic pollution. The recrudescent presence of industrial wastes is a source of heavy metals and results in pollutant transfer towards the aquatic environment in estuarine areas. Because of their mode of life, bivalves, including mussels and oyster...

2014
Haiying Hu Guoru Huang Jiangyong Hu

Understanding the characteristics of non-point sources (NPS) pollutions can provide theoretical support for improving water quality. Siheshui watershed located in south China was selected to explore the characteristics of NPS pollutions in rainfall-runoff process. In this small agricultural watershed, five flood events and one non-flood event were monitored, and the water quantity and quality c...

Journal: :Occupational and environmental medicine 2005
R Colvile

T he London Underground was for decades the envy of every capital city in the world. Forty year old trains were powered by electricity from a polluting oil fired power station. Tobacco smoking was permitted at stations and in some carriages. Levels and composition of dust on The Tube had been measured, and found to contain a variety of toxic substances including quartz from brake blocks, but co...

2014
Sangheon Lee Jiyong Woo Daeseok Lee Euijun Cha Hyunsang Hwang

In this research, we analyzed the multi-functional role of a tunnel barrier that can be integrated in devices. This tunnel barrier, acting as an internal resistor, changes its resistance with applied bias. Therefore, the current flow in the devices can be controlled by a tunneling mechanism that modifies the tunnel barrier thickness for non-linearity and switching uniformity of devices. When a ...

2011
C. Shen H. Schulzrinne

NSIS Quality of Service (QoS) signaling enables applications to perform QoS reservation along a data flow path. When the data flow path contains IP tunnel segments, NSIS QoS signaling has no effect within those tunnel segments. Therefore, the resulting tunnel segments could become the weakest QoS link and invalidate the QoS efforts in the rest of the end-to-end path. The problem with NSIS signa...

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