Marine and Lacustrine Soil Types free essay sample

The origins of soil deposits on the earth’s crust can reveal significant findings in the chemical and mechanical characteristics of the soils themselves. It is important to uncover such origins to find how and where such deposits may have formed over tens of thousands of years ago.Marine and Lacustrine deposits are two soil types that are commonly encountered during soil exploration, both of which are primarily traced back to either glacial o r more broadly, alluvial origins (Hunt 2005 ). They are somewhat alike in there fine sedimentary composition and similarly can be prone to presenting engineers with problematic conditions such as h igh secondary consolidation characteristics and subsidence, potential acid sulfate soils and quick clay landslides (Das 2007). The occurrences of marine soils are found in offshore and coastal plain deposits.It is important to note however the time scale of which marine deposition has occurred, such soils have become exposed from residing sea levels, glacial withdrawal (isostasy) and continental/tectonic plate shifts, meaning previous offshore deposits from past glaciation periods, h ave risen and are now exposed to human activity and land use. We will write a custom essay sample on Marine and Lacustrine Soil Types or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page The origin of marine soils can be traced back to glacial or alluvial transportation from land runoff through river outlets (Hunt 2005). Marine deposition also occurs due to aeolian transportation through wind relocation of fine grained sediments.One of the most iconic and well documented occurred in Rissa, Norway 1978, where a small excavation caused the disturbance and displacement of up to 5-6 million cubic meters of gently sloping farm and coastal land. The cause was due to the mechanical properties of the marine clay b eing altered after the soil was remolded, or in the case of Rissa, d isturbed by a shallow excavation. The changes in the ground conditions caused the collapse of the soil structure, p roducing an almost complete loss of shear strength , allowing the soil to form a liquid mass.

OverClocking CPUs essays

OverClocking CPUs essays What CPU is More Stable When Over-Clocked What CPU is more stable when over-clocked? That is a good question and that is what got me interested in this project. One day a couple years, back I got a relatively old computer and I was upset at how slow it was and decided to find out if it was possible to make it go faster. For a long time I looked and did not see anything on speeding up the computer and then one day I came across it. It was called over-clocking, the word caught my eye and I decided to check it out. Over-clocking looked like a complicated process but I was willing to check it out. There were terms in the book and web pages like voltage, multiplier, bus speed, clock speed, jumpers, and BIOS. These words were confusing so I looked them up. The voltage is the amount of electricity flowing to the CPU at any given time. The typical voltage is usually between 3 and 5 volts depending on the CPU and the task. The multiplier was the number that the bus speed was multiplied to in order to find out the CPU speed or clock speed. The multiplier is also a type of governor like on an engine that limits the speed so as not to put out too much power. When you over-clock a CPU, you are essentially over-riding the multipliers original setting, by increasing it to get a higher clock speed. To increase or decrease the multiplier you have to use jumpers on the motherboard or electronic switches in the BIOS. Over-clocking to increase something past its normal speed at which it runs. Over-clocking a Central Processing Unit (CPU) means to speed up the bus speed or the clock speed past its original setting. People often over-clock a CPU to increase the system performance at very little cost. Most of the time, you only need to change a few settings on your motherboard to make your system run faster. When over-clocking first became popular, it only amounted to changing the CPU clock speed to the next highest model of computer. Nowadays be...