scholarly journals Collision of a DNA Polymer with a Small Obstacle

2006 ◽  
Vol 39 (22) ◽  
pp. 7734-7745 ◽  
Author(s):  
Greg C. Randall ◽  
Patrick S. Doyle
Keyword(s):  
Small Obstacle

scholarly journals LiDAR guided Small obstacle Segmentation

2020 ◽  
Author(s):  
Aasheesh Singh ◽  
Aditya Kamireddypalli ◽  
Vineet Gandhi ◽  
K Madhava Krishna
Keyword(s):  
Small Obstacle

Upstream motions in stratified flow

1988 ◽  
Vol 187 ◽  
pp. 487-506 ◽  
Author(s):  
I. P. Castro ◽  
W. H. Snyder
Keyword(s):  
Body Height ◽  
Three Dimensional ◽  
Time Dependent ◽  
Experimental Measurements ◽  
Two Dimensional ◽  
Towing Tank ◽  
First Order ◽  
Density Perturbations ◽  
Small Obstacle ◽  
Obstacle Height

In this paper experimental measurements of the time-dependent velocity and density perturbations upstream of obstacles towed through linearly stratified fluid are presented. Attention is concentrated on two-dimensional obstacles which generate turbulent separated wakes at Froude numbers, based on velocity and body height, of less than 0.5. The form of the upstream columnar modes is shown to be largely that of first-order unattenuating disturbances, which have little resemblance to the perturbations described by small-obstacle-height theories. For two-dimensional obstacles the disturbances are similar to those found by Wei, Kao & Pao (1975) and it is shown that provided a suitable obstacle drag coefficient is specified, the lowest-order modes (at least) are quantitatively consistent with the results of the Oseen inviscid model.Discussion of some results of similar measurements upstream of three-dimensional obstacles, the importance of towing tank endwalls and the relevance of the Foster & Saffman (1970) theory for the limit of zero Froude number is also included.

scholarly journals Effects of Side Walls on Pipe Inlet Flow (Drag Reduction by Separated Flow Control Using Ring Shaped Small Obstacle)

2009 ◽  
Vol 4 (2) ◽  
pp. 468-478 ◽  
Author(s):  
Toshitake ANDO ◽  
Toshihiko SHAKOUCHI ◽  
Hiroyuki YAMAMOTO ◽  
Koichi TSUJIMOTO
Keyword(s):  
Drag Reduction ◽  
Flow Control ◽  
Separated Flow ◽  
Inlet Flow ◽  
Side Walls ◽  
Flow Drag ◽  
Small Obstacle ◽  
Pipe Inlet

scholarly journals MergeNet: A Deep Net Architecture for Small Obstacle Discovery

2018 ◽  
Author(s):  
Krishnam Gupta ◽  
Syed Ashar Javed ◽  
Vineet Gandhi ◽  
K. Madhava Krishna
Keyword(s):  
Small Obstacle

Small obstacle size prediction based on GA-BP neural network

2021 ◽  
Author(s):  
Yu Ning ◽  
Yongping Jin ◽  
Youduo Peng ◽  
Jian Yan
Keyword(s):  
Neural Network ◽  
Bp Neural Network ◽  
Small Obstacle

DIFFRACTIVE REFLECTION AND SCATTERING OF ULTRASONIC WAVES. THEIR INFLUENCE ON TORSION-PENDULUM MEASUREMENTS OF SOUND INTENSITY

1930 ◽  
Vol 3 (6) ◽  
pp. 491-509 ◽  
Author(s):  
R. W. Boyle ◽  
J. F. Lehmann
Keyword(s):  
Wave Train ◽  
Sound Intensity ◽  
Ultrasonic Waves ◽  
Special Importance ◽  
Torsion Pendulum ◽  
Sound Waves ◽  
Diffractive Scattering ◽  
Light Waves ◽  
Small Obstacle ◽  
Diffractive Reflection

Light waves are too short and ordinary sound waves generally too long to permit experimental work on diffraction and scattering by a single small obstacle. An opportunity for such work however is presented in the case of ultrasonic waves.This paper describes an experimental investigation on the factors which determine the diffractive reflection and scattering of an ultrasonic wave train by plane circular opaque discs, and discusses the results. These are of special importance in the measurement of sound energy intensity by the torsion-pendulum method, for such measurements should always be corrected to allow for the effect of diffractive scattering of the energy by the measuring-pendulum vane. The correction factor will depend on the size and form of the pendula vanes employed and for circular vanes can be obtained directly from such curves as are shown in this paper as results of the investigation.

scholarly journals Sculpted Bedrock Forms along the Niagara Escarpment, Niagara Peninsula, Ontario

2007 ◽  
Vol 46 (2) ◽  
pp. 195-207 ◽  
Author(s):  
Keith J. Tinkler ◽  
Ronald E. Stenson
Keyword(s):  
Flow Velocity ◽  
Continuous Spectrum ◽  
Niagara Escarpment ◽  
Site Mapping ◽  
A Site ◽  
Subglacial Meltwater ◽  
Small Obstacle

ABSTRACT Assemblages of subglacial sculpted bedrock forms (p-forms; Dahl, 1965) are identified on resistant units of the Niagara Escarpment in the Niagara Peninsula, and on the Onondaga Escarpment. The scale of the features is much larger than previously recorded for bedrock glacial features in the Peninsula (Feenstra, 1981) and we suggest that there is a continuous spectrum of forms from small obstacle marks with dimensions of a few centimetres, through ridges and furrows measured in tens of metres, to promontories on the order of kilometres. Such assemblages comprise fluted surfaces with a consistent orientation between N40E and N45E, and which show very little variation within a site. Mapping the features has increased our awareness of their extent, and of the problems they pose for mechanisms proposed to explain them. The morphometry of the forms is similar to that described elsewhere, and the irregular edge of the Niagara Escarpment to oncoming flows is thought to be responsible for the prominent features described. The apparent removal of substantial bedrock blocks implies flow velocity well in excess of 3 m/s. Therefore the sculpting of the forms is attributed to fast flowing subglacial meltwater which may have had a discharge of the magnitude of 2.1 x 106 cumecs.

Incompressible and ideal 2D flow around a small obstacle with constant velocity at infinity

2013 ◽  
Vol 71 (4) ◽  
pp. 679-687 ◽  
Author(s):  
Milton C. Lopes Filho ◽  
Huy Hoang Nguyen ◽  
Helena J. Nussenzveig Lopes
Keyword(s):  
Constant Velocity ◽  
2D Flow ◽  
Small Obstacle
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