Results 121 to 130 of about 9,940 (287)

Numerical and experimental study on P‐wave propagation across a rock joint with different orientations

Deep Underground Science and Engineering, EarlyView.
Joint orientation significantly affects P‐wave velocity, with the highest velocity at zero‐degree angles, decreasing to 30° as the angle increases. The velocity increases slightly from 30 to 45 degrees but sharply decreases from 45 to 90 degrees. Abstract Determination of the required parameters in different science contexts using the ultrasonic wave ...
Yaghoob Zarei, Mojtaba D. fallahi, Ali Uromeihy, Mohammad R. Nikoodel, Mohammad Fathollahy   +4 more
wiley   +1 more source

Advances in Studies of River Sediment and Fluvial Processes of 　　the Upper-Yangtze River in Earthquake Background

工程科学与技术, 2009
:Historical earthquakes were one of main dynamic factors for river sediment yield in Chuanjiang catchment,and Wenchuan earthquake in 2008 will further affect its soil erosion, and the trend of river sediment and fluvial processes.Wenchuan earthquake is ...
doaj  

Earthquake effects on youth: understanding psychological challenges and support needs

BMC Psychology
The aim of this study is to examine the effects of the earthquake on the psychological symptoms of high school students, and to understand the readiness of school counseling services based on the available data. In this context, the research was designed
Mehmet Şam, Göcan Sever, Habibe Yildiz Yüksel, Ramin Aliyev   +3 more
doaj   +1 more source

Presentation: Citizen Science: Man vs. Machine in Providing Rapid Earthquake Information

, 2004
Recent technological advances in computer and communication technology, as well as developments in seismic networks in the United States, have allowed seismologists to rapidly respond to earthquakes in revolutionary ways.
Wald, David, Environmental Science Institute   +1 more
core  

The impact of forced closure on proppant distribution of hydraulic fracturing in shale formations

Deep Underground Science and Engineering, EarlyView.
Research findings demonstrate that implementing forced closure within shale formations can remarkably mitigate proppant settlement, concurrently increasing the effective propped surface area from 29.74% to 38.68%. Abstract Forced closure is widely used in conventional oil and gas reservoirs to promote uniform proppant placement.
Tongxuan Gu, Hanyi Wang, Quan Gan, Shuang Zheng   +3 more
wiley   +1 more source

Gaborlet‐guided sparse filtering: A novel intelligent method for lithology identification by vibration signals while drilling

Deep Underground Science and Engineering, EarlyView.
The flowchart illustrates rock specimen testing, vibration signal acquisition, and feature extraction with Gaborlet and sparse filtering for classification. Abstract Traditional lithology identification methods mainly rely on core sampling and well‐logging data.
Jian Hao, Danqi Zhang, Zhenqi Song, Jinrui Wang, Qi Wang, Heqing Liu   +5 more
wiley   +1 more source

Instability mechanism and failure characteristics of underground cavern in block system under the action of seismic waves

Deep Underground Science and Engineering, EarlyView.
Seismic waves with tensile stress, high amplitude, and low frequency are most likely to trigger block instability and sliding. Blocks with a single sliding surface are more prone to movement than those with multiple constraints, and roof‐positioned blocks are especially vulnerable to slide.
Xiao Wang, Jinxiao Liu, Gaoshuo Zhang, Wenxin Li, Changdi He   +4 more
wiley   +1 more source

Characterization of the seismogenic source of the great 1905 Calabria (southern Italy) earthquake from environmental effects

, 2008
The september 8, 1905 Calabria (Southern Italy) earthquake belongs to a peculiar family of highly destructive (I0=XI) seismic events, mostly occurred at the dawning of the instrumental seismology, for which location, geometry and size of the source are ...
Tertulliani, A., Cucci, L.
core   +1 more source

High-resolution palynological analysis in Lake Sapanca as a tool to detect recent earthquakes on the North Anatolian Fault

, 2009
High-resolution palynological analysis of a 38-cm-long core collected from Lake Sapanca, northwest Turkey, reveals large earthquakes that occurred during the second half of the 20th century along the North Anatolian Fault Zone. Four events have disturbed
Boyraz, S, Gürbüz, A, Leroy, SAG
core  

Intensity Scale ESI 2007 for Assessing Earthquake Intensities

, 2015
Earthquake intensity scales were introduced at the end of the nineteenth century (e.g., Rossi-Forel, Cancani, Mercalli) in order to characterize source parameters, damage distribution, and environmental impact of relevant seismic events.
Pablo G. Silva, Alessandro Maria Michetti, Guerrieri, Luca, Silva, Pablo G., MICHETTI, ALESSANDRO MARIA, Luca Guerrieri   +5 more
core   +1 more source