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Crane (machine)
A crane is a tower or derrick equipped with cables and pulleys that can be used both to lift and lower materials and to shift them horizontally. Cranes are commonly employed in the construction ... > more -
Tissue engineering
Tissue engineering can perhaps be best defined as the use of a combination of cells, engineering materials, and suitable biochemical factors to improve or replace biological functions. While the ... > more -
Collapse of the World Trade Center
On September 11, 2001, the two main towers of the World Trade Center complex were each hit by hijacked commercial aircraft as part of the September 11, 2001 attacks. 2 WTC collapsed to the ground at ... > more -
Sedimentary rock
Sedimentary rock is one of the three main rock groups (along with igneous and metamorphic rocks) and is formed in four main ways: by the deposition of the weathered remains of other rocks (known as ... > more -
Electrical engineering
Electrical engineering (sometimes referred to as electrical and electronic engineering) is a professional engineering discipline that deals with the study and application of electricity, electronics ... > more -
Energy conservation
Energy conservation is the practice of reducing the use of energy in order to increase national security, personal security, save money, be more comfortable and/or help clean the ... > more -
Scale model
A scale model is a representation or copy of an object that is larger or smaller than the actual size of the object being represented. Very often the scale model is smaller than the original and used ... > more -
Circuit design
The process of circuit design can cover systems ranging from national power grids all the way down to the individual transistors within an integrated circuit. For simple circuits the design process ... > more -
Hydrogeology
Hydrogeology is the part of hydrology that deals with the distribution and movement of groundwater in the soil and rocks of the Earth's crust (commonly in ... > more
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