نتایج جستجو برای: submerged piles

تعداد نتایج: 13049  

2013
Ashraf Nazir Ahmed Nasr

Many offshore structures are subjected to overturning moments due to wind load, wave pressure, and ship impacts. Also most of retaining walls are subjected to horizontal forces and bending moments, these forces are due to earth pressure. For foundations in such structures, usually a combination of vertical and batter piles is used. Little information is available in the literature about estimat...

Journal: :Journal of the Royal Society, Interface 2007
Christian Jost Julie Verret Eric Casellas Jacques Gautrais Mélanie Challet Jacques Lluc Stéphane Blanco Michael J Clifton Guy Theraulaz

Many spatial patterns observed in nature emerge from local processes and their interactions with the local environment. The clustering of objects by social insects represents such a pattern formation process that can be observed at both the individual and the collective level. In this paper, we study the interaction between air currents and clustering behaviour in order to address the coordinat...

2004
Derek C. Richardson Pradeep Elankumaran Robyn E. Sanderson

We present numerical experiments investigating the shape and spin limits of self-gravitating “perfect” rubble piles that consist of identical, smooth, rigid, spherical particles with configurable normal coefficient of restitution and no sliding friction. Such constructs are currently employed in a variety of investigations, ranging from the formation of asteroid satellites to the dynamical prop...

2004
Allen K. McNamara Shijie Zhong

[1] Heterogeneous compositional mantle models are frequently invoked to explain some observations obtained from geochemistry and seismology. In particular, two regions in the Earth’s lower mantle, under the Pacific and Africa, are often interpreted as being either piles or superplumes of dense material. We perform numerical modeling of thermochemical convection in a three-dimensional spherical ...

2018
Ricardo Carrasco-Garcia Patricia Barroso Javier Perez-Olivares Vidal Montoro Joaquín Vicente

Understanding the role that facultative scavenger species may play in spreading infectious pathogens, and even becoming reservoirs for humans, domestic and wild ungulates or, on the contrary, preventing the spread of disease, requires a prior understanding of the pattern of carrion scavenging in specific scenarios. The objectives of this paper are (i) to describe the guild of vertebrate scaveng...

2015
Wei Xing Haoping Wu Qiao Shi Beibei Hao Han Liu Zhixiu Wang Guihua Liu

Stoichiometric homeostasis of element composition is one of the central concepts of ecological stoichiometry. We analyzed concentrations of macroelements (C, N, P, Ca, K, Mg, S), microelements (Cu, Fe, Mn, Mo, Ni, Zn) and beneficial elements (Na, Se, Si) in submerged macrophytes, water and sediments across 20 Yunnan plateau lakes. We predicted that tissue element composition in submerged macrop...

Journal: :تحقیقات آب و خاک ایران 0
مهدی یوسفی کارشناس ارشد ژئوتکنیک دانشگاه یاسوج محمد صدقی اصل استادیار گروه خاک شناسی دانشگاه یاسوج منصور پرویزی استادیار گروه مهندسی عمران دانشگاه یاسوج

so far, for an analysis of seepage under hydraulic structures much research has beenconducted in the form of numerical models. however, few field and laboratory workshave been performed to study the boiling phenomena for evaluating numerical models.throughout the present work, a laboratory model was built to simulate seepage and itscontrolling measures under sheet piles. the model consisted of ...

2010
Rakesh K. Goel

PARTIAL-MOMENT-CONNECTION TO THE DECK IN MARINE OIL TERMINALS By Rakesh K. Goel, F.ASCE ABSTRACT This paper presents development of a simplified procedure for seismic evaluation of piles with partial-moment-connection typically used in marine oil terminals. The current seismic evaluation procedure of the piles in marine oil terminals includes monitoring material strains specified in the Marine ...

Journal: :Waste management 2004
Thrassyvoulos Manios Edward I Stentiford

Shredded green wastes were composted in windrows, at the Harewood Whin landfill, near the city of York, in West Yorkshire, UK. Landfill leachate were added twice during the second and fourth week of the process in two piles. One pile was turned once every week for eight weeks and the other was turned twice, during the same period. Each time approximately, 2 m3 of leachate was added, into each p...

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