Results 81 to 90 of about 4,379 (222)

Kinematic Limit Analysis of Roof Stability for Elliptical Tunnels in Rock Masses

International Journal for Numerical and Analytical Methods in Geomechanics, Volume 49, Issue 16, Page 3880-3896, November 2025.
ABSTRACT Noncircular cross‐sections are commonly encountered in engineering practice; however, primary attempts to analyze roof stability have focused on circular and rectangular configurations. This study investigates the roof stability of elliptical tunnels with varying aspect ratios, employing two semi‐analytical approaches: piecewise linear and ...
Tae‐Won Seo, Dowon Park
wiley   +1 more source

Studi Geologi Teknik Tapak Penyimpanan Akhir Limbah Radioaktif (LRA) Demo Plant Tipe NSD Kedalaman Menengah Di Puspiptek, Serpong [PDF]

, 2014
Penyimpanan akhir limbah radioaktif bertujuan untuk menjaga agar zat radioaktif tidak terlepas ke lingkungan sampai aktivitas zat tersebut turun ke level yang aman.
Sadisun, I. A. (Imam), Sucipta, S. (Sucipta), Syaeful, H. (Heri)   +2 more
core   +2 more sources

Decadal Monitoring of Seismic Velocity Changes Beneath Izu‐Oshima, Central Japan, Using Ambient Seismic Noise Records

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 11, November 2025.
Abstract This study monitors the seismic velocity changes beneath the Izu‐Oshima volcano, central Japan, using ambient seismic noise records from 2003 to 2020. Applying seismic interferometry to the continuous waveform data from 24 seismic stations, we observed significant temporal variations in the seismic velocity structure.
Yohei Yukutake, Taka'aki Taira, Shin'ya Onizawa, Yuichi Morita   +3 more
wiley   +1 more source

Determination and applications of rock quality designation (RQD)

Journal of Rock Mechanics and Geotechnical Engineering, 2016
Characterization of rock masses and evaluation of their mechanical properties are important and challenging tasks in rock mechanics and rock engineering.
Lianyang Zhang
doaj   +1 more source

National‐scale terrestrial biodiversity and ecosystem monitoring with essential biodiversity variables in Japan and Finland

Ecological Research, Volume 40, Issue 6, November 2025.
Essential Biodiversity Variables (EBVs) provide a standardized framework for monitoring biodiversity change in line with conservation targets. We assessed terrestrial biodiversity datasets for EBVs in Japan and Finland, and compared Japan's data availability with GEO BON and EuropaBON, identifying both unique strengths and gaps.
Yayoi Takeuchi, Lea Végh, Hibiki Noda, Kristin Böttcher, Petteri Vihervaara, Jamie M. Kass, Ichiro Hama, Yusuke Saito   +7 more
wiley   +1 more source

Parametric Study on the Connection Between Poisson’s Ratio, GSI and Environmental Stress

Computer Assisted Methods in Engineering and Science, 2020
According to its definition, Poisson’s ratio is a measure of the Poisson effect, the phenomenon in which a material tends to expand in directions perpendicular to the direction of compression or, in other words, Poisson’s ratio is the ratio of relative ...
Benedek András Lógó, Balázs Vásárhelyi   +1 more
doaj   +1 more source

Stress reduction factor characterization for highly stressed jointed rock based on tunneling data from Pakistan [PDF]

, 2017
Stress Reduction Factor (SRF) which is the most difficult parameter to characterize in Q (Tunneling Quality Index) system is targeted in this study for highly stressed jointed rock in tunneling.
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core  

Geoengineering characterization of the rock masses of northern face of Jabal Sabir, Taiz city, Yemen [PDF]

, 2011
This paper is aimed at thedescription and the geotechnical characterization of the Tertiary granitic rock masses of the northern face of Sabir Mountain, Taiz city, Yemen, for the first time.
Abdul-Aleam Ahmed, A. D., Al-Qadhi, Janardhana, M. R.   +2 more
core   +2 more sources

Vanadium removal and recovery from aqueous solution with repeated use of a KOH‐modified seaweed biochar adsorbent: characterisation and removal mechanisms

Journal of Chemical Technology &Biotechnology, Volume 100, Issue 10, Page 2039-2052, October 2025.
Abstract BACKGROUND Vanadium (V) is a critical raw material which is extensively used in metallurgical, aerospace and chemical industries. However, V‐enriched wastewaters pose risks to human and environmental health due to their tendency to persist and bioaccumulate.
Bashir M Ghanim, Ronan Courtney, J Tony Pembroke, James J Leahy, Thomas F O'Dwyer, John G Murnane   +5 more
wiley   +1 more source

Peak friction angle estimation from joint roughness coefficient of discontinuities of limestone in Peninsular Malaysia [PDF]

, 2017
The peak friction angle (φpeak) roughness of discontinuity surfaces is a value that is fundamental to the understanding of shear strength of geological discontinuities, considering its importance in determining the mechanical properties of the ...
Abdul Ghani Rafek,, Ailie Sofyiana Serasa,, Azimah Hussin,, Goh, Thian Lai, Lee, Khai Ern, Tuan Rusli Mohamed,   +5 more
core   +1 more source