D'Alessandro M P, D'Alessandro D M, Kash J B, Jurca D A, Wakefield D S, Schallau S J, Galvin J R, Erkonen W E
Department of Radiology, University of Iowa, College of Medicine, Iowa City 52242, USA.
Bull Med Libr Assoc. 1998 Oct;86(4):564-8.
Rural physicians need access to digital health sciences libraries (DHSLs) that is easy and reasonably rapid. The goal of this project was to study rural hospitals' access to a DHSL on the Internet, by comparing differing access speeds with differing costs and their acceptability for retrieving text, image, and video information in a DHSL.
DHSL system response time was measured at three different times during the day over three different types of network connections (T1, Frame Relay, Modem). Text, image, and video information was retrieved. Costs were determined for installation and operation of the different types of network connections.
System response times were consistent at the three different testing times for each media type retrieved by each of the three network connection types. System response times for text retrieval met literature standards for all connections. Image retrieval met literature standards for T1 and Frame relay connections. No connection met literature standards for video retrieval.
High speed access to DHSLs is preferable; Frame relay connections provide substantively similar service as T1 connections at less cost. However, access via modem to a DHSL can provide access to the majority of information--text--in a DHSL with an acceptable system response time.
乡村医生需要能够便捷且相对快速地访问数字健康科学图书馆（DHSL）。本项目的目标是通过比较不同接入速度、不同成本以及乡村医院在数字健康科学图书馆中检索文本、图像和视频信息时对这些因素的可接受程度，来研究乡村医院对互联网上数字健康科学图书馆的访问情况。
在一天中的三个不同时间，通过三种不同类型的网络连接（T1、帧中继、调制解调器）测量数字健康科学图书馆系统的响应时间。检索文本、图像和视频信息。确定不同类型网络连接的安装和运营成本。
对于通过三种网络连接类型中的每一种检索到的每种媒体类型，在三个不同测试时间的系统响应时间是一致的。文本检索的系统响应时间符合所有连接的文献标准。图像检索符合T1和帧中继连接的文献标准。没有连接符合视频检索的文献标准。
高速访问数字健康科学图书馆是更可取的；帧中继连接以较低成本提供与T1连接基本相似的服务。然而，通过调制解调器访问数字健康科学图书馆可以在可接受的系统响应时间内提供对数字健康科学图书馆中大部分信息（文本）的访问。
