Results 11 to 20 of about 16,687 (260)

Spontaneous Sharp Bending of Double-Stranded DNA [PDF]

open access: yesMolecular Cell, 2004
Sharply bent DNA is essential for gene regulation in prokaryotes and is a major feature of eukaryotic nucleosomes and viruses. The explanation normally given for these phenomena is that specific proteins sharply bend DNA by application of large forces, while the DNA follows despite its intrinsic inflexibility.
Cloutier, Timothy E., Widom, Jonathan
openaire   +2 more sources

Examining meandering stream by using geomorphological characteristics with GIS-based analysis [PDF]

open access: yesE3S Web of Conferences, 2023
An assessment of the meandering stream type using its classification system to geomorphology characteristics combined with GIS-based analysis is presented in this paper. It describes geomorphology characteristics consisting of 8 parameters with GIS-based
Tallar Robby Yussac   +5 more
doaj   +1 more source

Effect of T-shaped spur dike length on mean flow characteristics along a 180-degree sharp bend

open access: yesJournal of Hydrology and Hydromechanics, 2021
An open channel flume with a central 180-degree bend with a rigid bed is designed to obtain a better understanding of the complex flow pattern around a T-shaped spur dike located in a sharp bend.
Akbari Maryam   +2 more
doaj   +1 more source

Design Consideration, Numerical and Experimental Analyses of Mode-Division-Multiplexed (MDM) Silicon Photonics Integrated Circuit with Sharp Bends

open access: yesSensors, 2023
Due to the popularity of different high bandwidth applications, it is becoming increasingly difficult to satisfy the huge data capacity requirements, since the traditional electrical interconnects suffer significantly from limited bandwidth and huge ...
Pin-Cheng Kuo   +9 more
doaj   +1 more source

Experimental investigation of flow pattern at 180° bend with rigid bed in effect of twin convergent bridge piers

open access: yesJournal of Engineering and Applied Science, 2022
The generation of vortices in sharp bends of rivers is a well-known phenomenon. However, their influence on the bridge pier has not been investigated deeply. This study studies the flow pattern around the twin convergent bridge pier in a sharp bend by an
Farid Sedighi   +2 more
doaj   +1 more source

Numerical Investigation of Bed Shear Stress and Roughness Coefficient Distribution in a Sharp Open Channel Bend [PDF]

open access: yesJournal of Applied Fluid Mechanics, 2023
The helical flow leads to the redistribution of the bed shear stress and roughness coefficient in open-channel bends, influencing the transport of sediment and riverbed evolution process.
P. Hu, M. Yu
doaj   +1 more source

Spontaneous sharp bending of DNA: role of melting bubbles [PDF]

open access: yesNucleic Acids Research, 2006
The role of centrally located and distributed base pair mismatches ('melting bubbles') on localized bending and stiffness of short dsDNA fragments is evaluated using time-dependent fluorescence lifetime measurements. Distributed melting bubbles are found to induce larger bending angles and decreased levels of stiffness in DNA than centrally located ...
Yuan, Chongli   +3 more
openaire   +2 more sources

An efficient classified radial basis neural network for prediction of flow variables in sharp open-channel bends

open access: yesApplied Water Science, 2019
In this study, a comparative analysis is done to evaluate the ability of classified radial basis function neural network (CRBFNN) model in estimation of flow variables in sharp open-channel bends with bend angles of 60° and 90°.
Azadeh Gholami   +3 more
doaj   +1 more source

Sharp bends of phononic crystal surface modes

open access: yesJournal of Physics: Condensed Matter, 2015
Sharp bending of surface waves at the interface of a two-dimensional phononic crystal (PnC) of steel cylinders in air and the method of using a diagonally offset cylindrical scatterer are numerically demonstrated by finite-element method simulations.
Cicek, Ahmet   +3 more
openaire   +3 more sources

Non-Trivial Transport Interface in a Hybrid Topological Material With Hexagonal Lattice Arrangement

open access: yesFrontiers in Physics, 2020
In this paper, a hybrid topological material with hexagonal lattice arrangement is proposed, consisting of six metal cylindrical resonators and a dielectric slab.
Lianlian Du   +5 more
doaj   +1 more source

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