WordNet

the customary manner in which a language (or a form of a language) is spoken or written; "English usage"; "a usage borrowed from French"

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〈U〉(物の)『用い方』,用法 / 〈C〉〈U〉(言語の)『慣用[法]』,語法

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2017/10/22 09:18:43」(JST)

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Usage is the manner in which written and spoken language is used, the "points of grammar, syntax, style, and the choice of words",^[1] and "the way in which a word or phrase is normally and correctly used". Usage can mean the way people actually use language or prescriptively the way one group feels that people ought to use it.^[2]

The Chicago Manual of Style says "the great mass of linguistic issues that writers and editors wrestle with don't really concern grammar at all—they concern usage: the collective habits of a language's native speakers",^[3] and "the standards of good usage change, however slowly."^[4]

Dictionaries are not always accurate guides to "good usage". "Despite occasional usage notes, lexicographers generally disclaim any intent to guide writers and editors on the thorny points of English usage."^[5]

History

According to Jeremy Butterfield, "The first person we know of who made usage refer to language was Daniel Defoe, at the end of the seventeenth century". Defoe proposed the creation of a language society of 36 individuals who would set prescriptive language rules for the approximately six million English speakers.^[6]

References

^ H. W. Fowler's Dictionary of Modern English Usage
^ Jeremy Butterfield, (2008) Damp Squid: The English Language Laid Bare, Oxford University Press, Oxford. 978-0-19-923906. p. 137.
^ University of Chicago (2010). The Chicago Manual of Style (16th ed.). Chicago: Univ. of Chicago Press. p. 261. ISBN 978-0-226-10420-1.
^ University of Chicago (2010). The Chicago Manual of Style (16th ed.). Chicago: Univ. of Chicago Press. p. 262. ISBN 978-0-226-10420-1.
^ University of Chicago (2010). The Chicago Manual of Style (16th ed.). Chicago: Univ. of Chicago Press. p. 262. ISBN 978-0-226-10420-1.
^ Jeremy Butterfield, (2008) Damp Squid: The English Language Laid Bare, Oxford University Press, Oxford. 978-0-19-923906. pp. 137–138.

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English Journal

The Relationship of Health Literacy With Use of Digital Technology for Health Information: Implications for Public Health Practice.

Manganello J1, Gerstner G, Pergolino K, Graham Y, Falisi A, Strogatz D.
Journal of public health management and practice : JPHMP.J Public Health Manag Pract.2016 Dec 15. [Epub ahead of print]
OBJECTIVE: An understanding of the association of health literacy with patterns related to access and usage of digital technologies and preferences for sources of health information is necessary for public health agencies and organizations to appropriately target channels for health information diss
PMID 26672402

Quantitative comparison of PET performance-Siemens Biograph mCT and mMR.

Karlberg AM1, Sæther O2, Eikenes L3, Goa PE4,5.
EJNMMI physics.EJNMMI Phys.2016 Dec;3(1):5. doi: 10.1186/s40658-016-0142-7. Epub 2016 Feb 25.
BACKGROUND: Integrated clinical whole-body PET/MR systems were introduced in 2010. In order to bring this technology into clinical usage, it is of great importance to compare the performance with the well-established PET/CT. The aim of this study was to evaluate PET performance, with focus on image
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Impact of MR-safe headphones on PET attenuation in combined PET/MRI scans.

Büther F1, Vrachimis A2, Becker A3, Stegger L4.
EJNMMI research.EJNMMI Res.2016 Dec;6(1):20. doi: 10.1186/s13550-016-0178-7. Epub 2016 Mar 2.
BACKGROUND: MR headphones are attenuation sources affecting PET quantification in hybrid PET/MRI. Despite potentially better patient communication, usage in PET/MRI scans is not approved by the vendor. This study aims to determine the impact of headphones on PET by means of phantom and patient scans
PMID 26936769

Ultrasonographic assessment of inferior vena cava/abdominal aorta diameter index: a new approach of assessing hypovolemic shock class 1.

Rahman NH1, Ahmad R2, Kareem MM3, Mohammed MI4.
International journal of emergency medicine.Int J Emerg Med.2016 Dec;9(1):8. doi: 10.1186/s12245-016-0101-z. Epub 2016 Feb 19.
BACKGROUND: We designed this study to expand the usage of ultrasound to detect early occurrence of hypovolemia. We explore the potential use of inferior vena cava (IVC) and abdominal aorta (AA) diameter index (IVC:AA) measured ultrasonographically to detect class 1 hypovolemic shock with blood loss
PMID 26894896