Results 71 to 80 of about 16,773 (290)

Thermochronologic Constraints on the Extensional History of the Ibex Hills, Southeastern Black Mountains, Death Valley, California

open access: yesGeological Journal, EarlyView.
A. Modeled T‐t paths for samples in the northern Ibex Hills, showing steady cooling throughout much of the Cenozoic, until rapid Miocene cooling. B. Weighted mean paths for each sample in this study. Note that all show a rapid cooling event at or just after 10 Ma, which is interpreted to represent exhumation as a result of regional extenstion ...
Zachariah D. Fleming
wiley   +1 more source

Control System Design for a Surface Effect Ship by Linear-Quadratic Regulator Method

open access: yesنشریه مهندسی دریا, 2017
In this paper, the main goal is to reduce the heave motion between a surface effect ship (SES) and a wind turbine in order to safely transfer equipment and person to SES.
ehsan Esmailian   +5 more
doaj  

Influence of Heave Plate on the Dynamic Response of a 10 MW Semisubmersible Floating Platform

open access: yesJournal of Marine Science and Engineering
Based on the 10 MW OO-Star semi-submersible floating platform, this study proposes internal and external heave plates to enhance its stability and explores their influence on the platform’s hydrodynamic characteristics. The platform’s structural behavior
Haijun Wang   +3 more
doaj   +1 more source

Set-Point Algorithms for Active Heave Compensation of Towed Bodies

open access: yes, 2016
Active heave compensation is a technique used in marine applications to attenuate undesirable wave motions between a load and its host vessel. Motion attenuation is often achieved by reeling in or reeling out a cable tethering the load to the host vessel
Calnan, Clark
core  

Independent leaf and root responses to autumn freezing in perennial herbs: Insights from cutting and transplant manipulations

open access: yesGrassland Research, EarlyView.
In this study, we compared two sampling approaches to assess autumn freezing resistance. Our goal was to determine whether the commonly employed cutting method, which disrupts root‐tissue connectivity, provides a valid measure of true freezing resistance.
Zhengjie Yan   +6 more
wiley   +1 more source

Anisotropic frost heaving coefficient of saturated permafrost considering moisture migration process based on standards

open access: yesShuiwen dizhi gongcheng dizhi
Frost heave in positive permafrost is a critical factor leading to frost damage of engineering in the cold region. The frost heave process results from the dynamic interaction of hydro-thermal forces.
Hui GE, Chunxiang GUO, Lei ZHANG
doaj   +1 more source

Research on an Active Heave Compensation System for Remotely Operated Vehicle

open access: yes, 2008
Heave motion of supporting ships deeply affect the normally operating, safely launching and recovering of Remotely Operated Vehicles when the sea state becomes rough.
Yang WL(杨文林)   +2 more
core  

New Schmidt hammer exposure‐age dating calibrations for the Last Glacial Termination in NW Scotland: Development and application to undated Torridon Group sandstone surfaces in Wester Ross

open access: yesJournal of Quaternary Science, EarlyView.
ABSTRACT An understanding of the terrestrial extent, retreat dynamics and climate–glacier coupling of ice masses during the Last Glacial Termination (LGT, ~18–11 ka) is often limited by a fragmentary geomorphological record and is dependent on precise, accurate and robust dating frameworks.
Alastair M. Curry   +3 more
wiley   +1 more source

Effects of Biochar on Freezing Temperature and Unfrozen Water Content in Pb‐Contaminated Seasonally Frozen Soils: Implications for Mitigating Land Degradation

open access: yesLand Degradation &Development, EarlyView.
ABSTRACT Freeze–thaw processes are important drivers of land degradation in cold regions, and soil freezing temperature and unfrozen water content are key parameters for characterizing soil hydrothermal conditions and water phase transitions during freezing.
Shanbo Han   +5 more
wiley   +1 more source

Frost heave cracking and uniaxial compression failure behavior of sandstone samples containing a flaw filled with water

open access: yesScientific Reports
The frost heave failure mechanism of fractured rock mass is a complicated problem faced by engineering construction in cold area. In this study, low temperature frost heave test and post-freezing uniaxial compression test on sandstone samples with a ...
Duofeng Cen, Yage Li
doaj   +1 more source

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