Workers' compensation is one of the few State-administered income-maintenance programs operating throughout the United States. The national "system" to provide benefits for work-caused disability and death actually consists of 50 independent State operations and several special Federal programs. The Social Security Administration developed and continues to improve basic statistics to measure tr...

Special class of surfaces, two-axial surfaces of revolution created by the Euclidean metric transformation of a simultaneous revolution about two different axes, is presented in the paper. Three specific subclasses of surfaces are classified with respect to the superposition of the two axes 1o, 2o of revolution. There are defined several types of two-axial surfaces of revolution specifying the ...

The untimely death on 22 September 1978 at the age of sixty-two of Kenneth Bryn Thomas brought great sadness to his many friends in many countries. The high regard in which he was held was not only for his outstanding place in his professional activities both in anaesthetics and in medical history but for his unique qualities as a true and loyal friend, ever ready with advice and encouragement ...