Chrystaller Central Place Theory: Theory was first proposed in the 1930s by German geographer Walter Chrystaller, based on his studies of southern Germany. August Losch in Germany and Brian Berry and others in the U.S further developed concepts during the 1950s. The theory applies most clearly in regions such as the Great Plains, which are neither heavily

It says even though a city may have begun with a CBD, it will have other smaller CBDs develop on the outskirts of the city If other CBDs develop on the outskirts of a city they would be around valuable housing areas to allow shorter commutes to the outskirts of the city. The number of nuclei around which the city expands depends upon situational as

Carbon and Energy Sources for Microbial Growth: Organism must have sources of energy, carbon for synthesis of new cellular material, and inorganic elements (nutrients) such as nitrogen, phosphorus, sulfur, potassium, calcium and magnesium; Carbon Sources: Organisms that use organic carbon for formation of new biomass are called heterotrophs; Organisms that derive cell carbon from carbon dioxide are called autotrophs

In this way, serious accidents can occur: the dams are only built to withstand a certain amount of water pressure; with the pressure from the sediment in some time the wall either explodes or water is caused to go above the dam, creating a waterfall; in both cases, a lot of organisms, including humans are in great danger. Dams are created in order to change the currents

It is the mathematical modeling of transportation systems (e.g., freeway junctions, arterial routes, roundabouts, downtown grid systems, etc.) through the application of computer software to better help plan, design and operate transportation systems. Simulation in transportation is important because it can study models too complicated for analytical or