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《Library & information science research》2019,41(3):100968
Conventional statistical methods (e.g. logistics regression, decision tree, etc.) have been used to analyze library demand-driven acquisitions (DDA) data. However, these methods are not well-suited to predict when acquisitions will be triggered or how long e-books will remain unused. Survival analysis, a statistical method commonly used in clinical research and medical trials, was employed to predict the time-to-trigger for DDA purchases within the context of a large research university library. By predicting which e-books will be triggered (i.e., purchased), as well as the time to trigger occurrence, the method tested in this study provides libraries a deeper understanding of factors influencing their DDA purchasing patterns. This understanding will help libraries optimize their DDA profile management and DDA budgets. This research provides a demonstration of how data science techniques can be of value for the library environment. 相似文献
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[目的/意义]探讨美国图书馆需求驱动采购（DDA）的标准化发展,介绍美国国家信息标准协会（NISO）出版的《图书的需求驱动采购推荐实施规范》（NISO DDA）,为中国图书馆DDA标准化建设提供参考。[方法/过程]通过文献考察,介绍NISO DDA产生的背景、规范的制定过程、规范的要素、作用以及NISO DDA应用中面临的挑战。[结果/结论]NISO DDA为DDA走向标准化和可持续发展奠定了基础。它对保护图书馆、出版商、经销商、电子图书数据库集成商等各利益相关者的利益,以及对各方在合作共赢的基础上规范化采纳推广DDA提供指南并起到积极的作用。同时,DDA的可持续发展继续面临着挑战。图书出版链中的各利益相关者仍然为DDA的可持续发展及标准化建设积极探索。 相似文献
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Demand-driven acquisition (DDA) programs are playing an increasingly important role in academic libraries. However, the literature surrounding this topic illustrates the wide-ranging, and frequently unpredictable, results of DDA implementation. As uncertainty abounds, librarians continue to seek out deeper understandings of those processes driving the use and purchase of DDA materials. Implicit in this search is a desire to understand how local environmental factors and user preferences dictate broader collection use and purchasing patterns. A small number of these studies have sought deeper insights through predictive modeling, though success has been limited. Following this line of inquiry, this study explores how machine learning might enable more effective collection development and management strategies through the predictive modeling of complex collection use and purchasing patterns. This research describes a replicable implementation of an adaptive boosting (AdaBoost) model that predicts the likelihood of DDA titles being triggered for purchase. The predictive capacity of this model is compared against a more traditional logistic regression model. This study's results show that the AdaBoost model possesses much higher predictive capacity than a regression-based model informed by the same set of predictors. The AdaBoost algorithm, once trained with local DDA data, provides accurate predictions in 82% of cases. 相似文献
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This article reports findings from a multiphase analysis of demand-driven acquisitions (DDA) within the academic research library setting. Evaluating local collections within the context of Trueswell's (1969) often-cited 80/20 Rule, phase one of this study illustrates the deficiencies of a just-in-case approach to building library collections. Following from this, phase two evaluates the viability of DDA as the just-in-time collection-building solution librarians have sought as an answer to low-use titles that plague most academic library collections. Supported by 16?months of data, this study scrutinizes the comparative value of DDA against traditionally acquired titles along two key dimensions—the subject-matter profile of purchases and their overall usage levels. Further, the concept of a utility as value paradigm, as well as a purchase-use equilibrium for library collections, provide a theoretical framework in which the relative value of DDA is assessed. From a content, or subject-matter, perspective, this study finds negligible deviation in those purchasing patterns associated with DDA when compared with traditionally-acquired materials. At the same time, DDA titles experience much higher levels of use and are, therefore, associated with markedly lower cost-per-use figures and greater overall value. 相似文献
5.
Carol Joyner Cramer 《期刊图书馆员》2013,64(1):87-97
This article reports on a talk delivered at the Mississippi State University Libraries eResource & Emerging Technologies Summit. The author introduces the concept of Demand-Driven Acquisition (DDA) for e-books and explains how it works. The author discusses predicting and controlling costs, as well as other implementation decisions. Finally, the author discusses the possibility of removing books from a DDA program and speculates on some of the effects of DDA on libraries and scholarly publishing. 相似文献
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Wendolyn C. Vermeer 《期刊图书馆员》2013,64(3-4):298-309
Demand-driven acquisitions (DDA) of electronic books (ebooks) has been a favored method of acquisitions in academic libraries for a number of years. Despite careful consideration and planning ahead of implementation, snags and hiccups may erupt in the acquisitions and cataloging workflow while executing a DDA pilot. Technical Services must remain attentive, collaborative, and flexible in order to redress known issues and anticipate potential ones. DDA is ultimately a worthwhile endeavor that has the potential to replace traditional bibliographer ebook title selection, particularly when the long-term integrity of a collections budget is in question. 相似文献
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Nackil Sung 《资料收集管理》2020,45(3):195-207
AbstractA DDA (Demand Driven Acquisitions) preferred Approval Plan allows libraries to acquire DDA eligible books triggered by users. Non-DDA books are acquired automatically, because there is no mechanism that allows these books to be requested by users. This study explores the procedure called Purchase by Request (PBR) that allows non-DDA books to be discoverable and requested by users. After incorporating both DDA and PBR into an Approval Plan, all books in the Approval Plan are exposed to users for just-in-time purchases, and in the process saving the library a substantial amount of money. 相似文献
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e-Government adoption model based on theory of planned behavior: Empirical validation 总被引：1，自引：0，他引：1
The e-Government phenomenon has become more important with the ever increasing number of implementations worldwide. A model explaining the e-Government adoption and the related measurement instrument – a survey – had been developed and validated in this study. In a post Technology Acceptance Model (TAM) approach, theory of planned behavior (TPB) was extended to fit the requirements of e-Government context. The adoption of student loans service of the higher education student loans and accommodation association of Turkey (KYK) was investigated to obtain data for empirical validation. The instrument was administered to over four-hundred students and partial least squares path modeling was employed to analyze the data. The results indicate that the model was an improvement over TAM in terms of predictive power. The constructs trust, perceived behavioral control and attitudes successfully explained the intention to use an e-Government service. The findings presented in this study provide useful insights for researchers and policy makers when dealing with e-Government services. 相似文献
10.
《资料收集管理》2013,38(3):205-216
A model is developed which minimizes the total annual cost of maintaining a journal collection with any given level of demand assuming that all requests will be met either from the collection or through interlibrary loans and that the obsolescence and scattering characteristics of the collection are known. The costs considered are the acquisition costs, storage costs, and the cost of interlibrary loans. The relationship between the annual number of requests and the optimal collection size is investigated. The collection comprehensiveness and the cost per request are also examined as a function of the demand level. 相似文献
11.
印刷型图书的馆际互借新模式的介绍与分析 总被引：4，自引：0，他引：4
关志英 《现代图书情报技术》2005,21(3):33-36
美国7所长春藤盟校联合开展了一项新的读者自助式馆际互借服务——Borrow Direct，它允许最终用户利用网络直接向典藏馆发送印刷型图书的馆际互借申请，从而将馆际互借周期缩短到4天，满足率提升到84%。本文对这一项目做了详细的介绍，并对其所代表的馆际互借发展的新趋势进行了分析。 相似文献
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张翠玲 《现代图书情报技术》2006,1(5):69-73
介绍分布式数据库中两种主要的死锁模型，分析4种分布式死锁检测算法的特点，并在此基础上提出一种改进的死锁检测方法，即运用动态创建DDA（死锁检测代理）的方法。该算法吸收已有的死锁检测算法的优点，而又避免其缺点，能很好地适应分布式数据库系统的需要。 相似文献
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读者决策的图书馆藏书采购——藏书建设2.0版 总被引：15，自引：3，他引：12
读者决策的图书馆采购开始迅速地应用在美国研究型图书馆,尤其是在电子图书采购的实践中.文章简要地回顾了图书馆藏书建设的形成以及催生这种新型模式的原因和技术环境,并描述了它的工作流程和问题. 相似文献
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我国高校图书馆区域馆际互借的发展和改革 总被引：1，自引：0，他引：1
分析目前我国高校图书馆区域馆际互借的几种典型模式及其特点,指出目前采用的手工操作服务模式存在的缺陷,对今后区域馆际互借的改革路向和内容进行了探讨。 相似文献
15.
Adeline Lee 《图书馆管理杂志》2013,53(6):629-643
ABSTRACT. Global outlook on library visitorship and loans point to a downward trend in physical visits and loans, whilst digital visits and loans are trending up. Singapore’s network of public libraries has not been spared and has been experiencing the same phenomenon of either declining or slow growth in visitorship and loans in the recent years. An inaugural nation-wide population study was launched in 2016 to comprehensively understand the state of reading in Singapore, reading motivation, and barriers to reading, lifestyle mapping, media technology habits, and Information- and knowledge-seeking habits. This article focuses on Singaporeans’ reading habits in physical and digital format. The findings shed light on ways Singapore libraries can attract the general public to make use of library content and services and can regain market share and remain relevant in the longer run. 相似文献
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《Public Library Quarterly》2013,32(4):45-56
Data from a 1992 survey of compliance by Ohio public libraries with state standards were used to examine relationships between achievement of a planning standard and each of 22 size variables. Significant but. weak correlations were found between planning scores and population of the service area, volumes per capita, number of ALA/MLS employees per capita, interlibrary loans to the library, and interlibrary loans from the library. Findings suggest that library size as traditionally measured may not have a substantial influence on a library's capacity to engage in long range planning. 相似文献
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The research seeks to provide the audience and web designers with a higher level of awareness about the level of accessibility problems within the e-government sector, specifically a sampling of 130 sites of the UK members of Parliament. The study applies the results of an online accessibility testing tool to analyze the compliance levels of both UK disability law and Web Content Accessibility Guidelines (WCAG). The research also show which guideline errors are the most prevalent among the sites and raises awareness about the issues of access in e-government. Although the UK's Disability Discrimination Act (DDA) of 1995 provides equality in access of websites to people with disabilities, the results of this study show that total openness of sites to these customers is not widespread and the vast majority of sites display similar non-compliance errors among the guidelines. For each of these issues, there are published methods that web designers can implement to improve the accessibility rankings of their sites and provide greater openness to users with disabilities. 相似文献
19.
图书馆联盟共建共享机制研究 总被引：26，自引：0，他引：26
ICOLC,DLF,NN/LM,OCLC,NDLTD,NSTL,CALIS是国内外6个较为有代表性的图书馆联盟。图书馆联盟的管理基本上分为理事(董事)会管理模式、实体组织机构模式和协议联盟3种模式。图书馆联盟的运行机制可以从管理角度和经营角度分为多种形式。从服务机制上看,图书馆联盟有盈利性的,也有非盈利性的。它们能提供联合目录服务、馆际互借与原文传递服务、电子许可服务等多种类型的服务。 相似文献
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Abstract Forty U.S. and Canadian medical libraries are electronically transmitting interlibrary loans to the Eastern European Medical Library of Latvia. This resource sharing initiative is an outgrowth of a pilot project of the International Cooperation Section of the Medical Library Association. The interlibrary loans are sent free of charge using the National Library of Medicine's DOCLINE system. This article will discuss the success of this program and how it started. 相似文献