Results 111 to 120 of about 79,589 (237)

Fingerprinting stress: stylolite and calcite twinning paleopiezometry revealing the complexity of progressive stress patterns during folding-the case of the Monte Nero anticline in the Apennines, Italy [PDF]

open access: yes, 2016
In this study we show for the first time how quantitative stress estimates can be derived by combining calcite twinning and stylolite roughness stress fingerprinting techniques in a fold-and-thrust belt.
Aharonov, Einat   +6 more
core   +3 more sources

Shaping Carbon Nitrides for Advanced Macrostructures

open access: yesAdvanced Materials Technologies, EarlyView.
This review examines how carbon nitride can be shaped through a range of printing and interfacial assembly methods. By bringing together additive manufacturing and liquid–liquid structuring concepts, carbon nitride is moving beyond its traditional powder‐based photocatalyst form toward digitally designed robust macroscale architectures with high design
Simona Baluchová, Baris Kumru
wiley   +1 more source

Fully Developed Open Channel Flow Over Clusters of Freshwater Mussels Partially Buried in a Gravel Bed

open access: yesWater Resources Research
The present study uses results of eddy‐resolving numerical simulations to investigate the open channel flow over large clusters of freshwater mussels (Unio elongatulus) partially buried in a rough, gravel bed. The density of the mussels forming the array
T. Lazzarin   +3 more
doaj   +1 more source

The effect of continuous natural roughness onhydraulic jump characteristics on the stone ramps

open access: yesمجله آب و خاک, 2017
Introduction: The hydraulic jump happens when flow transfers from supercritical regime to subcritical regime. The hydraulic jump on smooth bed is called the classic hydraulic jump.
M. F. Maghrebi, B. Mirzendehdel
doaj   +1 more source

A Surprise Occurrence in Acoustic Bottom Backscatter Measurements Conducted in the Eastern Bering Sea [PDF]

open access: yes, 2007
Acoustic backscatter measurements at different frequencies were made in the eastern Bering Sea in August 2006 from the NOAA Ship Fairweather. The measurements consisted of approximately 2,250 nm of trackline acoustic backscatter data from a 100 kHz RESON
Fonseca, Luciano E., Huff, Lloyd C
core   +1 more source

Selection of dune shapes and velocities. Part 1: Dynamics of sand, wind and barchans

open access: yes, 2002
Almost fifty years of investigations of barchan dunes morphology and dynamics is reviewed, with emphasis on the physical understanding of these objects. The characteristics measured on the field (shape, size, velocity) and the physical problems they rise
Andreotti, Bruno   +2 more
core   +3 more sources

Investigate of Effect of Cylinder Roughness on Maximum Velocity of Density Current Body [PDF]

open access: yesعلوم و مهندسی آبیاری, 2015
Sedimentationin the dam reservoirs reduces storage volume sand as a result the useful life of the dam reduced.In deep dam reservoir the turbidity current usually are the reason of transport and deposition of sediment.
Bahareh Sheikhi Nejad, Mehdi Ghomeshi
doaj  

Bed Shear Stress in Unsteady Open Channel Flow Over Rough Beds

open access: yesEngineer: Journal of the Institution of Engineers, Sri Lanka, 2008
Very few studies have been carried out in the past in estimating bed shear stress in unsteady flows over rough channel beds. The shear velocity derived from de Saint Venant equations was compared with the steady state formulation using experimental data.
K. P. P. Pathirana   +2 more
openaire   +2 more sources

Surface Roughness Characteristics and Their Influence on Wind Erosion and Sand Movement

open access: yesAtmosphere
Wind erosion significantly threatens sustainable development in desert regions, causing severe soil degradation. Investigating the influence of roughness elements on wind–sand interactions is vital for devising effective wind erosion control strategies ...
Jie Zhou, Beibei Han, Haifeng Wang
doaj   +1 more source

The emerging use of magnetic resonance imaging to study river bed dynamics [PDF]

open access: yes, 2015
The characterization of surface and sub-surface sedimentology has long been of interest to gravel-bed river researchers. The determination of surface structure is important as it exerts control over bed roughness, near-bed hydraulics and particle ...
Haynes, Heather   +4 more
core  

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