Results 31 to 40 of about 1,014,437 (288)

Quantitative Evaluation for Reinforcement Effect of Auxiliary Steel Beams Based on Running Safety and Dynamic Response

Shock and Vibration, 2021
Aiming at the existing heavy-haul railway, bridges hardly meet the transportation requirements. Based on the spatial vibration calculation model of the freight train–track–bridge (FTTB) system, the FTTB spatial vibration model under the condition of ...
Gong Kai, Liu Linya, Xiang Jun, Yang Haiming, Yu Cuiying   +4 more
doaj   +1 more source

NoiseSPY: a real-time mobile phone platform for urban noise monitoring and mapping [PDF]

, 2010
In this paper we present the design, implementation, evaluation, and user experiences of the NoiseSpy application, our sound sensing system that turns the mobile phone into a low-cost data logger for monitoring environmental noise.
Kanjo, E
core   +1 more source

Nationwide distribution and factors related to indoor fine particulate matter concentrations in subway stations in Korea: Results of first-year measurement

Environment International
This study assessed the seasonal distribution and factors associated with PM2.5 in nationwide subway stations in Korea. A total of 229,644 data points collected over one year were used to determine one-day PM2.5 concentrations from 642 subway stations ...
Su Jung Park, Jeonghoon Kim, In-Keun Shim, Jongchun Lee   +3 more
doaj   +1 more source

Signal specific electric potential sensors for operation in noisy environments [PDF]

, 2009
Limitations on the performance of electric potential sensors are due to saturation caused by environmental electromagnetic noise. The work described involves tailoring the response of the sensors to reject the main components of the noise, thereby ...
A Aydin, C J Harl, Gebrial W, Gebrial W, Grabham N J, H Prance, Harland C J, Harland C J, Jain A K, P B Stiffell, Prance H, Prance R J, Prance R J, R J Prance, Ratha N K, S T Beardsmore-Rust   +15 more
core   +1 more source

Indoor air quality and its determinants in underground shopping malls in Korea

Environment International
Underground shopping malls (USMs) are often open or semi-open environments with interconnected passageways, resulting in the sharing of indoor air. However, indoor air quality (IAQ) within these spaces can vary due to many diverse emission sources.
Jeonghoon Kim, In-Keun Shim, Soo Ran Won, Eun Seol Hwang, Yumi Lee, Sujung Park, Jungmin Ryu, Jongchun Lee   +7 more
doaj   +1 more source

Investigation and modeling of transport noise dependence on traffic speed and impact on population annoyance

Journal of Environmental Engineering and Landscape Management, 2022
Transport noise is a serious problem in cities and has a negative impact on both health and economics. In addition to the aforementioned unnoticed health effects, traffic noise has also been identified as one of the leading causes of sleep disorders ...
Tomas Vilniškis, Andrej Naimušin, Tomas Januševičius   +2 more
doaj   +1 more source

Impact of environmental colored noise in single-species population dynamics

, 2017
Variability on external conditions has important consequences for the dynamics and the organization of biological systems. In many cases, the characteristic timescale of environmental changes as well as their correlations play a fundamental role in the ...
Hidalgo, Jorge, Muñoz, Miguel A., Spanio, Tommaso   +2 more
core   +1 more source

Resonant Activation of Population Extinctions [PDF]

, 2017
Understanding the mechanisms governing population extinctions is of key importance to many problems in ecology and evolution. Stochastic factors are known to play a central role in extinction, but the interactions between a population's demographic ...
Doering, Charles R., Flierl, Glenn R., Spalding, Christopher   +2 more
core   +5 more sources

Noise from Different Metro Train Types on Elevated Tracks: A Case Study Based on Field Measurements

Buildings
To systematically investigate the influence of metro train types on the operational noise of elevated rail transit, this study conducted field measurements on elevated sections of the Wuhan Metro Yangluo Line, Wuhan Metro Line 2, and Guangzhou Metro Line
Lizhong Song, Zhichao Wang, Pengfei Zhang, Quanmin Liu, Bingyang Bai   +4 more
doaj   +1 more source

Noise suppression of on-chip mechanical resonators by chaotic coherent feedback

, 2015
We propose a method to decouple the nanomechanical resonator in optomechanical systems from the environmental noise by introducing a chaotic coherent feedback loop. We find that the chaotic controller in the feedback loop can modulate the dynamics of the
Li, Chun-Wen, Liu, Lian-qing, Liu, Yu-xi, Nori, Franco, Wang, Hui, Wu, Re-Bing, Yang, Nan, Zhang, Jing   +7 more
core   +1 more source