Structural principles - Forces. In any building design, the strength and stability of an overall building and its individual components must be considered. This involves structural calculations to work out the effects of all the forces acting on any component in the building and on the building overall. To do this we need to resolve the forces in the system to see what the overall effects are likely to be. An overview of the many different forces acting on a building.
Amyotrophic lateral sclerosis (ALS), also known as Lou Gehrig's disease and motor neurone disease (MND), is a specific disease that causes the death of neurons which control voluntary muscles. Some also use the term motor neuron disease for a group of conditions of which ALS is the most common. ALS is characterized by stiff muscles, muscle twitching, and gradually worsening weakness due to muscles decreasing in size. This results in difficulty in speaking, swallowing, and eventually breathing. The cause is not known in 90% to 95% of cases. About 5â10% of cases are inherited from a person's parents.
Amyotrophic lateral sclerosis (ALS) is a progressive neurological disease that causes dysfunction of the nerves that control muscle movement. Over time, this leads to muscle weakness, gradually affecting how the body functions.