Results 41 to 50 of about 1,368,722 (222)

Investigation on tunnel stability considering pipe‐roof support with transparent soil technology

Deep Underground Science and Engineering, EarlyView.
This study integrates transparent soil technology, 3D reconstruction and numerical simulation to captures the full‐field deformation of shield tunnel instability. Results demonstrate that pipe‐roof support enhances stability via the “soil‐arching barrier effect,” effectively restraining failure wedge development by extending stress transfer paths ...
Zhi Jia, Yunpeng Ji, Zhao Lu, Honghua Zhao, Limin Zhang   +4 more
wiley   +1 more source

Dynamic indentation of viscoelastic orthotropic layer supported by a Winkler–Pasternak foundation

Acta Mechanica
In this study, the two-dimensional dynamic contact problem between a rigid flat punch and a viscoelastic orthotropic layer is investigated. The motivation of the study is to provide a better understanding of the vertical vibration of the two-parameter ...
I. Çömez
semanticscholar   +1 more source

Forced Vibration Analysis of Functionally Graded Anisotropic Nanoplates Resting on Winkler/Pasternak-Foundation

Computers Materials & Continua, 2020
: This study investigates the forced vibration of functionally graded hexagonal nano-size plates for the first time. A quasi-three-dimensional (3D) plate theory including stretching effect is used to model the anisotropic plate as a continuum one where ...
B. Karami, M. Janghorban, T. Rabczuk
semanticscholar   +1 more source

Nonlocal Vibration Behavior of a Viscoelastic SLGS Embedded on Visco- Pasternak Foundation Under Magnetic Field [PDF]

Journal of Nanostructures, 2013
This paper is concerned with the surface and small scale effects on transverse vibration of a viscoelastic single-layered graphene sheet (SLGS) subjected to an in-plane magnetic field.
A. Ghorbanpour-Arani, M. Shokravi
doaj   +1 more source

Robotic‐assisted laparoscopic surgery in urogynecology and gynecology: A global survey of current practice, perceptions, training and educational gaps

International Journal of Gynecology &Obstetrics, EarlyView.
Abstract Objective To evaluate global access to robotic‐assisted laparoscopic surgery (RAS), utilization patterns, perceptions, and training exposure among surgeons practicing in gynecology and urogynecology. Methods We conducted a cross‐sectional, web‐based international survey administered through the International Urogynecological Association (IUGA)
Yair Daykan, Barry A. O'Reilly, Steven E. Schraffordt Koops, Mika Rabinovich, Maya Pasternak, Orfhlaith E. O'Sullivan, Reut Rotem   +6 more
wiley   +1 more source

Simplified Calculation Method for Existing Tunnel Settlement Caused by Shield Under-passing Based on Timoshenko-PasternakModel

Chengshi guidao jiaotong yanjiu
Objective It is aimed to tackle the inefficient accuracy of traditional Euler-Bernoulli beam and Winkler foundation model in calculating settlement induced by shield under-passing existing tunnels. Method Based on the Timoshenko beam theory and Pasternak
WANG Liang, PAN Bintao, JIANG Jie, LONG Yihang   +3 more
doaj   +1 more source

Wasteosomes accumulate in periventricular white matter hyperintensities and exhibit complex relationships with mixed pathology, sclerotic index, and perivascular space

Brain Pathology, EarlyView.
In a mixed diagnostic cohort of pathologically diagnosed Alzheimer's disease, cerebrovascular disease, mixed pathology, and control tissue, we connected the histopathological wasteosome profile in periventricular (PV) brain sections to 7T FLAIR‐MRI confirmed PV white matter hyperintensities (WMHs), vascular stenosis and perivascular space size ...
Nikita Ollen‐Bittle, Isabella Boesgaard, Austyn Roseborough, Meaghan Frank, Qi Zhang, Stephen H. Pasternak, Robert Hammond, Shawn N. Whitehead   +7 more
wiley   +1 more source

Nonlinear vibrations of fluid transporting pipelines on a viscoelastic foundation

Инженерно-строительный журнал, 2019
The article presents the results of a study of vibration process in pipelines conveying fluid or gas. A mathematical model pipeline was used in the form of cylindrical shell and a viscoelastic foundation in the form of two-parameter model of the ...
Bakhtiyar Khudayarov, Fozil Turaev
doaj   +1 more source

Annual Research Review: Associations of socioeconomic status with cognitive function, language ability, and academic achievement in youth: a systematic review of mechanisms and protective factors

Journal of Child Psychology and Psychiatry, Volume 66, Issue 4, Page 417-439, April 2025.
Low socioeconomic status (SES) is negatively associated with children's cognitive and academic performance, leading to long‐term educational and economic disparities. In particular, SES is a powerful predictor of executive function (EF), language ability, and academic achievement.
Divyangana Rakesh, Paris Anne Lee, Amruta Gaikwad, Katie A. McLaughlin   +3 more
wiley   +1 more source

Simplified analytical method for evaluating the effects of overcrossing tunnelling on existing shield tunnels using the nonlinear Pasternak foundation model

, 2019
The excavation of a new tunnel above an existing shield tunnel at close proximity may cause a series of adverse impacts on the underlying tunnel. Thus, a reasonable assessment of the existing shield tunnel’s responses to overcrossing tunnelling is ...
Rong-zhu Liang
semanticscholar   +1 more source