Bar and channel formation in braided streams

1989 ◽  
pp. 417-462 ◽  
Author(s):  
Yuichiro Fujita
Keyword(s):  
Channel Formation ◽  
Braided Streams

Formation of Dislocation Channels in Neutron Irradiated Molybdenum

1972 ◽  
Vol 30 ◽  
pp. 672-673
Author(s):  
S. Mahajan
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Ambient Temperature ◽  
Room Temperature ◽  
Channel Formation ◽  
Early Stages ◽  
Transmission Electron ◽  
Three Stages ◽  
Two Stages ◽  
Polycrystalline Molybdenum

The evolution of dislocation channels in irradiated metals during deformation can be envisaged to occur in three stages: (i) formation of embryonic cluster free regions, (ii) growth of these regions into microscopically observable channels and (iii) termination of their growth due to the accumulation of dislocation damage. The first two stages are particularly intriguing, and we have attempted to follow the early stages of channel formation in polycrystalline molybdenum, irradiated to 5×1019 n. cm−2 (E > 1 Mev) at the reactor ambient temperature (∼ 60°C), using transmission electron microscopy. The irradiated samples were strained, at room temperature, up to the macroscopic yield point.Figure 1 illustrates the early stages of channel formation. The observations suggest that the cluster free regions, such as A, B and C, form in isolated packets, which could subsequently link-up to evolve a channel.

n-channel formation on semi-insulating InP surface by m.i.s.f.e.t.

1979 ◽  
Vol 15 (23) ◽  
pp. 743 ◽  
Author(s):  
Tsuyoshi Kawakami ◽  
Masamichi Okamura
Keyword(s):  
Channel Formation ◽  
Inp Surface

Convection and channel formation in solidifying Pb-Sn alloys

1997 ◽  
Vol 28 (3) ◽  
pp. 859-866 ◽  
Author(s):  
Michael I. Bergman ◽  
David R. Fearn ◽  
Jeremy Bloxham ◽  
Margarita C. Shannon
Keyword(s):  
Channel Formation

Electrochemical sensing of the ion-channel formation of OmpF

2009 ◽  
Vol 39 (8) ◽  
pp. 1163-1167 ◽  
Author(s):  
Han Xiao ◽  
Deli Hong ◽  
Tongyang Zhu ◽  
Shanli Liu ◽  
Genxi Li
Keyword(s):  
Ion Channel ◽  
Electrochemical Sensing ◽  
Channel Formation

scholarly journals Impact of flow variability and sediment characteristics on channel width evolution

2018 ◽  
Vol 40 ◽  
pp. 05044
Author(s):  
Andrés Vargas-Luna ◽  
Alessandra Crosato ◽  
Protogene Byishimo ◽  
Wim Uijttewaal
Keyword(s):  
Grain Size ◽  
Peak Flow ◽  
River Channel ◽  
Channel Width ◽  
River Morphology ◽  
Channel Formation ◽  
Sediment Characteristics ◽  
Alluvial Rivers ◽  
Water Flows ◽  
Streamflow Variability

Alluvial rivers are shaped by sequences of water flows excavating their channels. Observations show that besides the magnitude, also the frequency and duration of streamflow oscillations might be important for the river channel formation. In addition, the river morphology appears influenced also by both size and degree of uniformity of the sediment. Nevertheless, many morphodynamic studies still represent the flow regime with a single value of the discharge, often corresponding to the bankfull condition, and the sediment with its median grain size. This work investigates the effects of streamflow variability and sediment characteristics on channel width formation, analysing the evolution of experimental streams with different sediments and discharge hydrographs. Results show that the formative condition of the channel width is not the geometric bankfull flow but a rather frequent peak flow. Remarkably different channel configurations arise from different sediment characteristics in the laboratory, where sediment non-uniformity produces more stable banks.

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