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Universal Systems Language ( USL) is a systems modeling language and formal method for the specification and design of software and other complex systems. It was designed by Margaret Hamilton based on her experiences writing flight software for the Apollo program. [1] The language is implemented through the 001 Tool Suite software by Hamilton ...
The systems modeling language ( SysML) [ 1] is a general-purpose modeling language for systems engineering applications. It supports the specification, analysis, design, verification and validation of a broad range of systems and systems-of-systems . SysML was originally developed by an open source specification project, and includes an open ...
Single-payer healthcare. Single-payer healthcare is a type of universal healthcare [ 1] in which the costs of essential healthcare for all residents are covered by a single public system (hence "single-payer"). [ 2][ 3] Single-payer systems may contract for healthcare services from private organizations (as is the case in Canada) or may own and ...
Universal health care. Universal health care (also called universal health coverage, universal coverage, or universal care) is a health care system in which all residents of a particular country or region are assured access to health care. It is generally organized around providing either all residents or only those who cannot afford on their ...
A finite-state machine ( FSM) or finite-state automaton ( FSA, plural: automata ), finite automaton, or simply a state machine, is a mathematical model of computation. It is an abstract machine that can be in exactly one of a finite number of states at any given time. The FSM can change from one state to another in response to some inputs; the ...
v. t. e. A presidential system, or single executive system, is a form of government in which a head of government, typically with the title of president, leads an executive branch that is separate from the legislative branch in systems that use separation of powers. This system was first introduced in the United States.
The cosmological principle is usually stated formally as 'Viewed on a sufficiently large scale, the properties of the universe are the same for all observers.'. This amounts to the strongly philosophical statement that the part of the universe which we can see is a fair sample, and that the same physical laws apply throughout.
v. t. e. Systems theory is the transdisciplinary [ 1] study of systems, i.e. cohesive groups of interrelated, interdependent components that can be natural or artificial. Every system has causal boundaries, is influenced by its context, defined by its structure, function and role, and expressed through its relations with other systems.