Psychology & Psychiatry

Number of suicides in Japan hits record low

The number of suicides in Japan fell to a record low in 2019, the government said Friday, as the country tackles one of the world's highest suicide rates.

Diseases, Conditions, Syndromes

Eight deaths in Germany blamed on shrew-borne disease

Eight cases of the Borna virus, transmitted by shrews, have been identified in encephalitis patients who died between 1999 and 2019, researchers said Wednesday.

Health

'Turning point' as number of male smokers drops: WHO

The number of male tobacco users is falling for the first time, the World Health Organization said Thursday, hailing a "major shift" in efforts to kick the world's deadly tobacco addiction.

Gerontology & Geriatrics

2003 to 2017 saw increase in deaths at home, hospice facility

From 2003 to 2017, there was a decrease in deaths occurring in hospitals and nursing facilities and an increase in deaths at home and at hospice facilities, according to a research letter published in the Dec. 12 issue of ...

Health

Rural population underrepresented among medical students

(HealthDay)—In 2017, less than 5 percent of all incoming medical students were rural students, according to a study published in the December issue of Health Affairs, a theme issue on rural health.

Diseases, Conditions, Syndromes

Fears for infants in Samoa as measles deaths mount

Measles infections continued to climb steeply in Samoa Thursday as a mass vaccination programme fails to reach the infants most vulnerable to the deadly epidemic.

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Number

A number is a mathematical object used to count and measure. In mathematics, the definition of number has been extended over the years to include such numbers as zero, negative numbers, rational numbers, irrational numbers, and complex numbers.

Mathematical operations are certain procedures that take one or more numbers as input and produce a number as output. Unary operations take a single input number and produce a single output number. For example, the successor operation adds one to an integer, thus the successor of 4 is 5. Binary operations take two input numbers and produce a single output number. Examples of binary operations include addition, subtraction, multiplication, division, and exponentiation. The study of numerical operations is called arithmetic.

A notational symbol that represents a number is called a numeral. In addition to their use in counting and measuring, numerals are often used for labels (telephone numbers), for ordering (serial numbers), and for codes (e.g., ISBNs).

In common use, the word number can mean the abstract object, the symbol, or the word for the number.

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