Results 51 to 60 of about 79,313 (301)

Two-dimensional discrete element modelling of bender element tests on an idealised granular material [PDF]

Granular Matter, 2012
The small-strain (elastic) shear stiffness of soil is an important parameter in geotechnics. It is required as an input parameter to predict deformations and to carry out site response analysis to predict levels of shaking during earthquakes. Bender element testing is often used in experimental soil mechanics to determine the shear (S-) wave velocity ...
O’Donovan, J., O’Sullivan, C., Marketos, G.   +2 more
openaire   +1 more source

C2α‐carbanion‐protonating glutamate discloses tradeoffs between substrate accommodation and reaction rate in actinobacterial 2‐hydroxyacyl‐CoA lyase

FEBS Open Bio, EarlyView.
Enzymes of the 2‐hydroxyacyl‐CoA lyase group catalyze the condensation of formyl‐CoA with aldehydes or ketones. Thus, by structural adaptation of active sites, practically any pharmaceutically and industrially important 2‐hydroxyacid could be biotechnologically synthesized. Combining crystal structure analysis, active site mutations and kinetic assays,
Michael Zahn, Barbara Seroka, Ryszard Lazny, Zenon Lotowski, Thore Rohwerder   +4 more
wiley   +1 more source

Experimental Study of the Engineering Mechanical Properties of the Foundation Soil for Offshore Wind Power Platforms

Shock and Vibration, 2021
Most of the coastal beach zone in the world is rich in wind energy reserves and has great potential for offshore wind power development. However, the sedimentary environment in the coastal area is complex and changeable, and the nature of the foundation ...
Yi Fang, Yuejun Lv, XingYuan Zhou, Yanju Peng   +3 more
doaj   +1 more source

Matrix metalloproteinase‐9 regulates cell adhesion and membrane protrusive activity of ovarian cancer cells

FEBS Open Bio, EarlyView.
Matrix metalloproteinase‐9 (MMP9) drives ovarian cancer progression. Using MMP9‐null cells (M9‐KO) created from ovarian cancer cells, we found MMP9 loss did not block Epidermal Growth Factor (EGF)‐driven E‐cadherin dissolution or EMT but delayed and reduced EGF‐driven membrane protrusions. Transient MMP9 re‐expression drove membrane protrusion.
Claire Strauel, Sam Bennett, Natalie Ehlinger, Nelson Cook, Katelyn Marvin, Caleb L. Lines, Sam Reyes, Brooke Kirby, Shawn M. Ellerbroek   +8 more
wiley   +1 more source

Effect of earthquake excitation on circular tunnels: Numerical and experimental study

Measurement + Control, 2019
This paper studies the behaviour of circular tunnel subjected to dynamic excitation. Tunnels with three different diameters were selected to perform the shake table test at three different covers. The dry sandy soil was used for testing.
DK Singh, SR Karumanchi, A Mandal, YB Katpatal, A Usmani   +4 more
doaj   +1 more source

The Habitable-zone Planet Finder Calibration System

, 2014
We present the design concept of the wavelength calibration system for the Habitable-zone Planet Finder instrument (HPF), a precision radial velocity (RV) spectrograph designed to detect terrestrial-mass planets around M-dwarfs.
Bender, Chad, Diddams, Scott, Halverson, Samuel, Hearty, Fred, Levi, Eric, Mahadevan, Suvrath, Osterman, Steve, Ramsey, Lawrence, Roy, Arpita, Schwab, Christian, Terrien, Ryan, Ycas, Gabe   +11 more
core   +1 more source

The Role of Calcitonin Gene‐Related Peptide in High‐Altitude Headache: A Prospective Field Study

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective High‐altitude headache (HAH) is a common neurological condition associated with rapid ascent to high altitude. The pathophysiological mechanisms underlying HAH remain incompletely understood. Calcitonin gene‐related peptide (CGRP), a neuropeptide implicated in migraine pathophysiology, may play a key role in the pathophysiology of ...
Roman Schniepp, Ludwig Karrasch, Helena Breitenstein, Andreas Straube, Katharina Kamm   +4 more
wiley   +1 more source

Study on Shear Wave Attenuation Laws in Granular Sediments Based on Bender Element Test Simulations

Journal of Marine Science and Engineering
The propagation characteristics of shear waves in granular sediments are usually used to assess the dynamic response and liquefaction potential of marine engineering foundations.
Jingyu Tan, Yong Wang, Xuewen Lei, Jingqiang Miao   +3 more
doaj   +1 more source

Determination of the force necessary by experiment to bend schedule 40 pipe [PDF]

Científica
The tube bending process consists of plastically deforming the material by applying bending loads to the element until its yielding is overcome. Mechanical bending tests help determine the properties of a material, properties that are used to design the ...
Iván González Uribe, Liliana Gutiérrez Lonche, Romy Pérez Moreno, Ivonne Patricio Macias   +3 more
doaj   +1 more source

Time-Reversal Violating Schiff Moment of 225Ra [PDF]

, 2003
We use the Skyrme-Hartree-Fock method, allowing all symmetries to be broken, to calculate the time-reversal-violating nuclear Schiff moment (which induces atomic electric dipole moments) in the octupole-deformed nucleus 225Ra.
Bender, M., de Jesus, J. H., Dobaczewski, J., Engel, J., Olbratowski, P.   +4 more
core   +4 more sources