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Margaret A. Newman (October 10, 1933 - December 18, 2018) was an American nurse, university professor and nursing theorist. She authored the theory of health as expanding consciousness, which was influenced by earlier theoretical work by Martha E. Rogers, one of her mentors from graduate school.
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.
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.
Nursing theory is defined as "a creative and conscientious structuring of ideas that project a tentative, purposeful, and systematic view of phenomena". [1] Through systematic inquiry, whether in nursing research or practice, nurses are able to develop knowledge relevant to improving the care of patients.
PSR B1919+21 is a pulsar with a period of 1.3373 seconds [4] and a pulse width of 0.04 seconds. Discovered by Jocelyn Bell Burnell on 28 November 1967, it is the first discovered radio pulsar. [5]
The average level of a rectangular wave is also given by the duty cycle. The pulse wave is used as a basis for other waveforms that modulate an aspect of the pulse wave, for instance: Pulse-width modulation (PWM) refers to methods that encode information by varying the duty cycle of a pulse wave.
Virginia Avenel Henderson (November 30, 1897 – March 19, 1996) was an American nurse, researcher, theorist, and writer. [1]Henderson is famous for a definition of nursing: "The unique function of the nurse is to assist the individual, sick or well, in the performance of those activities contributing to health or its recovery (or to peaceful death) that he would perform unaided if he had the ...
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]