منابع مشابه
What is stress? Concepts, definitions and applications in seed science.
'Stresses' that impact upon seeds can affect plant reproduction and productivity, and, hence, agriculture and biodiversity. In the absence of a clear definition of plant stress, we relate concepts from physics, medicine and psychology to stresses that are specific to seeds. Potential 'eustresses' that enhance function and 'distresses' that have harmful effects are considered in relation to the ...
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The search for knowledge regarding healthy/adequate food has increased in the last decades among the world population, researchers, nutritionists, and health professionals. Since ancient times, humans have known that environment and food can interfere with an individual's health condition, and have used food and plants as medicines. With the advance of science, especially after the conclusion o...
متن کاملOperational research as implementation science: definitions, challenges and research priorities
BACKGROUND Operational research (OR) is the discipline of using models, either quantitative or qualitative, to aid decision-making in complex implementation problems. The methods of OR have been used in healthcare since the 1950s in diverse areas such as emergency medicine and the interface between acute and community care; hospital performance; scheduling and management of patient home visits;...
متن کاملConstructing cryptographic definitions
This paper mirrors an invited talk to ISCISC 2011. It is not a conventional paper so much as an essay summarizing thoughts on a little-talked-about subject. My goal is to intermix some introspection about definitions with examples of them, these examples drawn mostly from cryptography. Underpinning our discussion are two themes. The first is that definitions are constructed. They are i...
متن کاملClinical Supervision in Nursing Education: Definitions and Models
Introduction: Clinical supervision, as a mechanism for promoting knowledge and professional skills of nurses, is a core activity in nursing practice. To use clinical supervision in nursing education, it is necessary to have a comprehensive understanding of definitions and models. This paper explains the role and models of clinical supervision in nursing education. Methods: This study is a narr...
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ژورنال
عنوان ژورنال: Nature
سال: 1972
ISSN: 0028-0836,1476-4687
DOI: 10.1038/236245c0