Results 1 to 10 of about 6,845 (273)

(Un)predictability in rip channel systems [PDF]

Geophysical Research Letters, 2007
Predicting the development of rip channel systems on beaches is relevant for beach safety, nearshore mixing and dispersion, and has been puzzling researchers for decades. Field observations and computer simulations have focused on predicting the spacing and growth time of rip channels as a function of wave characteristics.
D Calvete, Giovanni Coco, A Falqués
exaly   +5 more sources

Modelling the alongshore variability of optimum rip current escape strategies on a multiple rip-channelled beach [PDF]

Natural Hazards, 2015
Rip currents are a leading cause of drowning on beaches worldwide. How bathers caught in a rip current should attempt to escape has been a subject of recent debate. A numerical model of human bathers escaping from a rip current flow field is applied to a 2-km-long section of the open beach of Biscarrosse, SW France.
Bruno Castelle, R Jak Mccarroll, Robert W Brander   +2 more
exaly   +5 more sources

Vertical Distribution of Rip Currents Generated by Intersecting Waves in a Sandbar–Groin Systems

Journal of Marine Science and Engineering
To analyze the impacts of groins, sandbars, and channels on the three-dimensional features of rip currents, we conducted experimental investigations on the vertical distribution of rip currents under intersecting waves along barred beaches with channels.
Yan Wang, Zhili Zou, Zhongbo Liu, Meixia Song   +3 more
doaj   +4 more sources

Development and evaluation of a rip current forecasting system for channel-type rip currents on a low-energy headland beach

Geomatics, Natural Hazards & Risk
A 34-day field observation was conducted on a headland beach in South China with a typical channel rip current system. The Delft3D model was applied to reproduce hydrodynamic conditions and extract rip currents, while a Generalized Additive Model (GAM ...
Yan Sun, Lulu Liu, Xiaodong Bian, Daoheng Zhu, Zhiqiang Li   +4 more
doaj   +4 more sources

Transmitter and ion channel profiles of saccadic omnipause neurons and cholinergic non-omnipause neurons in human nucleus raphe interpositus [PDF]

Frontiers in Neuroanatomy
BackgroundOmnipause neurons (OPN) are glycinergic neurons that tonically inhibit burst neurons between saccades. In primates, OPNs are located bilaterally around the midline at the level of the traversing rootlets of the abducens nerve in the pontine ...
Ümit S. Mayadali, Maximilian John, Michael Abspacher, Christoph Schmitz, Aasef G. Shaikh, Anja K. E. Horn   +5 more
doaj   +2 more sources

Beachgoers' ability to identify rip currents at a beach in situ [PDF]

Natural Hazards and Earth System Sciences, 2021
Rip currents (“rips”) are the leading cause of drowning on surf beaches worldwide. A major contributing factor is that many beachgoers are unable to identify rip currents. Previous research has attempted to quantify beachgoers' rip identification ability
S. J. Pitman, K. Thompson, D. E. Hart, K. Moran, S. L. Gallop, S. L. Gallop, R. W. Brander, A. Wooler   +7 more
doaj   +3 more sources

Surf zone surface retention on a rip‐channeled beach [PDF]

Journal of Geophysical Research: Oceans, 2009
The retention of floating matter within the surf zone on a rip‐channeled beach is examined with a combination of detailed field observations obtained during the Rip Current Experiment and a three‐dimensional (3‐D) wave and flow model. The acoustic Doppler current profiler–observed hourly vertical cross‐shore velocity structure variability over a period
Reniers, A.J.H.M. (author), MacMahan, J.H. (author), Thornton, E.B. (author), Stanton, T.P. (author), Henriquez, M. (author), Brown, J.W. (author), Brown, J.A. (author), Gallagher, E. (author)   +7 more
  +14 more sources

Flow Characteristics of the Rip Current System near a Shore-Normal Structure with Regular Waves

Journal of Marine Science and Engineering, 2023
Rip currents are the strong narrow seaward current produced by waves breaking on the coast. Of the many types of rip currents, the present study investigates, experimentally and numerically, the rip current system produced by the wave reflection on a ...
Jie Xu, Sheng Yan, Zhili Zou, Chengshu Chang, Kezhao Fang, Yan Wang   +5 more
doaj   +1 more source

Surf zone diffusivity on a rip‐channeled beach [PDF]

Journal of Geophysical Research: Oceans, 2009
Absolute and relative diffusivity are measured on a rip‐channeled beach using 30 position‐tracking drifters released in clusters (4–12 drifters) deployed on 7 days with different wave forcing and tidal elevations at Sand City, Monterey Bay, California. Diffusivity and dispersion were found to be larger on days with rip current flow patterns and larger ...
Brown, J. (author), MacMahan, J. (author), Reniers, A.J.H.M. (author), Thornton, E. (author)   +3 more
openaire   +3 more sources

How to Shut Down Transcription in Archaea during Virus Infection

Microorganisms, 2022
Multisubunit RNA polymerases (RNAPs) carry out transcription in all domains of life; during virus infection, RNAPs are targeted by transcription factors encoded by either the cell or the virus, resulting in the global repression of transcription with ...
Simona Pilotto, Finn Werner
doaj   +1 more source