Whois & Analysis for news-medical.net

Science is a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe.

Expert is defined differently in varying academic fields.

Psychology defines an expert using superior performance; sociology considers that expertise is a label given to an individual by a group and is interested in the power held by experts; philosophy stresses the kind of knowledge held by experts but not novices.

Informally, an expert is someone widely recognized as a reliable source of or skill whose faculty for judging or deciding rightly, justly, or wisely is accorded authority and status by peers or the public in a specific well-distinguished domain.

An expert, more generally, is a person with extensive knowledge or ability based on research, experience, or occupation and in a particular area of study.

Experts are called in for advice on their respective subject, but they do not always agree on the particulars of a field of study.

An expert can be believed, by virtue of credential, training, education, profession, publication or experience, to have special knowledge of a subject beyond that of the average person, sufficient that others may officially (and legally) rely upon the individual's opinion.

Historically, an expert was referred to as a sage (Sophos).

The individual was usually a profound thinker distinguished for wisdom and sound judgment.

Health is the level of functional and metabolic efficiency of a living organism.

In humans it is the ability of individuals or communities to adapt and self-manage when facing physical, mental or social changes.

The World Health Organization (WHO) defined health in its broader sense in its 1948 constitution as "a state of complete physical, mental, and social well-being and not merely the absence of disease or infirmity." This definition has been subject to controversy, in particular as lacking operational value, the ambiguity in developing cohesive health strategies, and because of the problem created by use of the word "complete".

Other definitions have been proposed, among which a recent definition that correlates health and personal satisfaction.

Professional certification, trade certification, or professional designation, often called simply certification or qualification, is a designation earned by a person to assure qualification to perform a job or task.

Not all certifications that use post-nominal letters are an acknowledgement of educational achievement, or an agency appointed to safeguard the public interest.