Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 2208 for “"sand"”.
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Piles in Sand and in Sand Overlying Clay
… tubular steel piles driven and placed into loose sand and loose sand overlying clay. The soil was placed and instrumented under controlled conditions in a 3.0m diameter by 3.0m deep concrete tank. The 60mm pile was dynamically driven using a pneumatically controlled driving rig, whilst the 114mm …
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Sand distribution effect on three dimensional printed sand properties
1 PDF file (xii, 89 pages)
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Generation of sand ripples and sand bars by surface waves
Part I Generation of Sand Ripples by Surface Waves In Chapter 1, we study the sand ripple instability under partially standing surface waves in constant water depth. For gently sloped ripples, the approximate flow field is· worked out. By invoking an empirical formula of sediment transport rate, an …
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Sand dune interactions
Sand dunes are coherent sedimentary structures shaped by the shear stress exerted by the overlaying fluid. Natural dunes abundantly populate deserts, river bottoms, sea beds, and even snow fields. They rarely occur in isolation, but usually form extensive dune fields, which continuously evolve due …
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We Sink Beneath the Sand
<p><em>We Sink Beneath the Sand</em> is a memoir that explores the desire for control in the face of abandonment. A few days before the narrator’s eleventh birthday, her older brother, then a sixteen-year-old boy, walks out of the front door of their home and never returns. For over a decade, the …
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Sand modeling of crustal extension
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric and Planetary Sciences, 1985.
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The moult and migration strategies of Lesser Sand Plover, Greater Sand Plover and Terek Sandpiper
… of the life cycle to be undertaken. Lesser Sand Plovers, Greater Sand Plovers and Terek Sandpipers are among the least known of the commonly encountered long-distance migrant waders in Africa and Australasia. This is particularly true for the populations which spend the non-breeding season …
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Ground movements during tunnelling in sand
… - ground deformation relationship for tunnels in sands, the construction process was modelled using the technique of geotechnical centrifuge modelling and the resulting ground deformations were recorded using digital image correlation. In these tests a unique tunnel face boundary condition was …
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Behaviour of model foundations on sand
… is to examine the behaviour of foundation/sand interaction under load at a pre-failure stage generally known as "Serviceability". The semi-full scale foundation used is a purpose designed bolted steel box, instrumented to measure contact stresses and displacements at selected points. Three …
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Predicting surface water profiles in sand
… to predict soil water profiles for a column of sand which was constructed in the laboratory where physical experiments were performed to alternately saturate and then drain the water from the sand column and measure the actual soil water profile. The results of the predicted soil water were then …
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Behavior of Batter Piles in Sand
… appropriate for the small batter pile groups in sand were suggested. Investigations of various pile-to-pile cap connections for the prestressed concrete piles using full-scale static experimental results were performed. On the basis of analytical results, the degree of fixity for each …
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The morphology of alluvial sand dunes
This Dissertation was approved for publication on 2021-04-15 at 12:04.
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Stone tools and sand veld settlement
… site recording programme was carried out in the sandveld of the south-western Cape, South Africa. The types of site examined included rock art locations, stone artefact scatters, deposit-containing shelters and shell middens. Considerable variation was found to exist in assemblage composition and …
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The Mechanics Of Momentum Transfer From Explosive Charges Buried In Water, In Sand, And In Sand With Fines
… first examines the behavior of a bed containing sand-like particles suspended in air by virtue of the flow of the air. A computational technique, using finite differences, was developed to solve the equations of motion for the fluidized bed. The method was applied to predict Couette flow and …
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Engineering characteristics of compacted sand-bentonite mixtures
Sand-clay mixtures are commonly used as a liner/barrier material in various engineering applications, such as construction of hydraulic and waste containments. Permeability, compressibility and strength are important properties of sand-clay mixtures and are often required for the design of the …
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Modeling central pattern generators in sand crabs
Ordinary differential equation models based on those of Hodgkin and Huxley are presented in an effort to describe a part icular anomalous digging behaviour in t he anomuran decapod crust acean Emerita analoga. At the onset of a dig, the fourth (hindmost) right and left legs stroke together about …
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Spermatogenesis in the sand crab Emerita Analoga
… sperm cells or Emerita analoga, the so-called sand crab. This animal has been used by the writer for studies on spermatogenesis and on spermatozoan behavior during the summer or 1951, 1952, and 1953 at the Pacific Marine Station.</p>
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The microbial biochemistry of slow sand filters.
… of Scotland produces potable water by using slow sand filtration. This method of potable water production involves raw water percolating through a porous sand bed allowing the removal of particles by a combination of physical and biological mechanisms. The unique feature of slow sand filters is …
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