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Imogene King (January 30, 1923 – December 24, 2007) was a pioneer of nursing theory development. Her interacting systems theory of nursing and her theory of goal attainment have been included in every major nursing theory text. These theories are taught to thousands of nursing students, form the basis of nursing education programs, and are ...
The flow profiles was first derived by John R. Womersley (1907–1958) in his work with blood flow in arteries. [1] The cardiovascular system of chordate animals is a very good example where pulsatile flow is found, but pulsatile flow is also observed in engines and hydraulic systems , as a result of rotating mechanisms pumping the fluid.
The unqualified term instability strip usually refers to a region of the Hertzsprung–Russell diagram largely occupied by several related classes of pulsating variable stars: [1] Delta Scuti variables, SX Phoenicis variables, and rapidly oscillating Ap stars (roAps) near the main sequence; RR Lyrae variables where it intersects the horizontal branch; and the Cepheid variables where it crosses ...
Ida Jean Orlando (August 12, 1926 – November 28, 2007) was an American nurse whose theory has significant relevance for nursing in many countries worldwide. [1]Orlando graduated as a nurse from New York Medical College in 1947.
This coupling is measured by the relative linear growth- or decay rate κ of the amplitude of a given normal mode in one pulsation cycle (period). For the regular variables (Cepheids, RR Lyrae, etc.) numerical stellar modeling and linear stability analysis show that κ is at most of the order of a couple of percent for the relevant, excited ...
Edwin Ray Guthrie (/ ˈ ɡ ʌ θ r i /; January 9, 1886 – April 23, 1959), a behavioral psychologist, began his career in mathematics and philosophy in 1917. He spent most of his career at the University of Washington, where he was a full-time professor and later became an emeritus professor in psychology.
Cepheid variables are divided into two subclasses which exhibit markedly different masses, ages, and evolutionary histories: classical Cepheids and type II Cepheids. Delta Scuti variables are A-type stars on or near the main sequence at the lower end of the instability strip and were originally referred to as dwarf Cepheids.
The Helvie Energy Theory of Nursing and Health is a nursing theory developed by Carl O. Helvie's lifelong cross-cultural exposure to various ways of assessing, planning, implementing and evaluating health with application to individuals, families, and to specific communities across the world. [1] [2] [3]