Concentration of gamma radiation for medical purposes

Problem: in the absence of lenses for gamma rays, radiation therapy damages outlying tissues. Large doses become problematic.

Solution: use geometric discrimination to filter gamma rays propagating in select directions. Isotope core has a form of a tablet; system of metallic concentric cones attenuates radiation except for propagating in approximately paraxial direction.

Prior Art: Coded mask techniques in gamma-ray astronomy.

Garbage combustion system

Problem: Combustion of garbage creates a lot of poisonous gases.

Solution: produce most of oxidation of carbon in superheated steam. If necessary, coal dust can be added to garbage to ensure correct proportion of carbon vs. hydrogen and oxygen in given batches. Use catalytic oxidation of CO to boil water. Use produced, filtered and Thomson-cooled components of the Wassergas (primarily, mixture of H2, CH4 and nitrogen) for energy production.

System of automated traffic

Problem: current systems (Google-mobile) take too much computer resources and have very complex algorithms to imitate human driving.

Solution: microwave-absorbing bar codes on cars, lorries, road and road signs. Millimeter-wave or terahertz radars instantly ascertain vehicles and distances. Allow automated driving only on specially prepared highways.

Efficient harvesting of the wind energy

Problem: Current windmill-type designs are inefficient, dangerous for the birds and low-flying aircraft, etc.

Solution: replace the propeller blades with stacks of airfoils. Lift of the wind gusts raises and lowers the airfoils. Horizontal displacement is transferred into rotational motion required by the dynamo by a simple mechanical device not so different from the automatic winding devices of mechanical watches used in recent past.