Results 61 to 70 of about 19,254 (188)

Positive Surge Propagation in Sloping Channels [PDF]

, 2017
A simplified model for the upstream propagation of a positive surge in a sloping, rectangular channel is presented. The model is based on the assumptions of a flat water surface and negligible energy dissipation downstream of the surge, which is ...
Defina, Andrea, Peruzzo, Paolo, Viero, DANIELE PIETRO   +2 more
core   +2 more sources

Existence of Solution for Two Classes of Quasilinear Systems Defined on a Nonreflexive Orlicz–Sobolev Spaces

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT This paper proves the existence of nontrivial solution for two classes of quasilinear systems of the type −ΔΦ1u=Fu(x,u,v)+λRu(x,u,v)inΩ−ΔΦ2v=−Fv(x,u,v)−λRv(x,u,v)inΩu=v=0on∂Ω$$ \left\{\begin{array}{l}\hfill -{\Delta}_{\Phi_1}u={F}_u\left(x,u,v\right)+\lambda {R}_u\left(x,u,v\right)\kern0.1832424242424242em \mathrm{in}\kern0.3em \Omega ...
Lucas da Silva, Marco Souto
wiley   +1 more source

Invading interfaces and blocking surfaces in high dimensional disordered systems

, 1997
We study the high-dimensional properties of an invading front in a disordered medium with random pinning forces. We concentrate on interfaces described by bounded slope models belonging to the quenched KPZ universality class.
A. Bunde, D. A. Kessler, G. Parisi, K. Sneppen, L.-H. Tang, M. A. Rubio, M. Kardar, N. Martys, O. Gat, O. Narayan, Omri Gat, P. Meakin, S. Havlin, S. V. Buldyrev, S. V. Buldyrev, T. Ala-Nissila, T. E. Harris, T. Nattermann, V. K. Horváth, W. Feller, Z. Csahók, Z. Olami, Z. Olami, Zeev Olami   +23 more
core   +1 more source

Experimental Investigation of Moisture Movement During Freeze–Thaw Cycles and Its Effect on Physical Rock Weathering in Low‐Porosity Alpine Limestone

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT The progressive weakening of alpine rockwalls through subcritical cracking, driven by repeated low‐magnitude stress processes, plays a key role in alpine rock weathering. Laboratory studies using acoustic emission (AE) monitoring have shown that thermal stresses from freeze–thaw cycling induce crack propagation, with recent work highlighting ...
Andrew Mitchell, Oliver Sass
wiley   +1 more source

Hydrodynamic Characteristic and Prediction Study of 1, 1, 1, 2-Tetrafluoroethane under Supercritical Pressure [PDF]

Journal of Applied Fluid Mechanics
The supercritical organic Rankine cycle (S-ORC) is highly effective for utilizing medium- and low-temperature heat sources. This study investigated the hydrodynamic behavior of supercritical-pressure 1,1,1,2-tetrafluoroethane (R134a) within a horizontal ...
S. C. Liu, Z. G. Li, W. Han, Y. X. Jiao, S. M. Zheng, X. T. Song, J. H. Kou   +6 more
doaj   +1 more source

Observations and numerical simulations of a valley‐exit wind in the Alpine Bolzano basin

Quarterly Journal of the Royal Meteorological Society, EarlyView.
The evolution and spreading of the nocturnal valley‐exit wind flowing from the Isarco Valley into the Bolzano basin, in the Italian Alps, are found to be influenced by the basin temperature stratification. Measurements and high‐resolution simulations show that a cold‐air pool favors an upward trajectory of the flow at the exit of the valley.
Federica Gucci, Andrea Zonato, Marco Falocchi, Dino Zardi, Lorenzo Giovannini   +4 more
wiley   +1 more source

SOC in a population model with global control

, 1999
We study a plant population model introduced recently by J. Wallinga [OIKOS {\bf 74}, 377 (1995)]. It is similar to the contact process (`simple epidemic', `directed percolation'), but instead of using an infection or recovery rate as control parameter ...
Bak, Bak, Bröker, Dorit, Drossel, Grassberger, Hans-Martin Bröker, Hasegawa, Hertel, Jensen, Olami, Peter Grassberger, Sneppen, Sornette, Vigilant, Wall, Wallinga, Wilkinson, Zhang   +18 more
core   +1 more source

Refining the timing of Middle Pleistocene (MIS 12 to MIS 6) ice advances into northern central Europe: sedimentological analysis and single‐grain luminescence dating of glaciotectonic complexes and tunnel‐valley fills

Boreas, EarlyView.
We summarize the current state of knowledge on the age of the Middle Pleistocene ice advances into northern central Europe and provide 25 new single‐grain feldspar luminescence ages of Elsterian and Saalian glacigenic sediments to constrain the age of the ice advances and their tentative correlation with marine isotope stages/substages.
Niklas von Soest, Neda Rahimzadeh, Debra Colarossi, Falko Malis, Tobias Lauer, Wera Sander‐Beuermann, Yvonne Spychala, Christian Brandes, Runa Fälber, Sumiko Tsukamoto, Jutta Winsemann   +10 more
wiley   +1 more source

Discharge Computation of Trapezoidal Side Weir in Subcritical Flow Regime Using Conventional Weir Theory

مجله آب و خاک, 2016
Introduction: Side weir structures are extensively used in hydraulic engineering, irrigation and environmental engineering, and it usually consists of a main weir and a lateral channel. Side weirs are also used as an emergency structure.
S. Riahi, A.R. Vatankhah
doaj   +1 more source

Analytic results for the scaling behaviour of a piecewise-linear map of the circle [PDF]

, 1986
For the piecewise-linear circle map theta to theta ', with theta ' identical to theta + Omega -K-(1/2- mod theta (mod 1)-1/2) the parameter values Omega i at which a periodic orbit, starting at theta =0 with winding number Fi/Fi+1, where Fi is the ith ...
Wilbrink, Jacob
core   +2 more sources