翻訳と辞書 Words near each other ・ Patrologia Latina ・ Patrologia Orientalis ・ Patron (disambiguation) ・ Patron and priest relationship ・ Patron Capital ・ Patron de New-York ・ Patron saint ・ Patron saints of ailments, illness, and dangers ・ Patron saints of Europe ・ Patron saints of Naples ・ Patron saints of occupations and activities ・ Patron saints of places ・ Patron saints of Poland ・ Patron Tequila (song) ・ Patron the DepthMC ・ Patron-driven acquisition ・ Patron-Minette ・ Patrona ・ Patrona Halil ・ Patrona Osman Pasha ・ Patronaat ・ Patronage ・ Patronage (disambiguation) ・ Patronage (novel) ・ Patronage (transportation) ・ Patronage concentration ・ Patronage in ancient Rome ・ Patronage in astronomy ・ Patronage of the Blessed Virgin Mary ・ Patronage Sainte-Anne Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Patron-driven acquisition ： ウィキペディア英語版 Patron-driven acquisition Patron-driven acquisition (PDA) is a model of library collection development in which a library only purchases digital content, like e-books and e-journals, when it is clear that a patron wants them. In an ideal transaction, libraries provide the patron with access to search engines, academic databases and/or library catalogs from which the patron can request items. When certain thresholds are reached for an item (e.g., number of pages read or number of requests), the library purchases the item and delivers instant access to patrons. The library may acquire the resource permanently, or acquire a license to use the resource only at certain times or in certain ways. Since content purchased is in digital format, "PDA emphasizes collecting for and at the moment of need" instead of collecting with a long-term focus. Ordering of print books have also been done by libraries by loading records into a library catalog with a button that initiates the formal purchase. There are several benefits to focusing this practice on the use of digital content: delivery is instantaneous; eBooks require no physical space, which requires specific costs to maintain; libraries can afford patron access when they might not be able to afford to buy materials, increasing the collection's ability; and purchases are guaranteed usage, which is an important consideration to purchasing materials.〔 ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Patron-driven acquisition」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.