CAREER: User-Centric Data Management

网络已经渗透到人类活动的方方面面。无论是从用户生成内容的数量还是从信息交换的自动化程度来看，Web 2.0都带来了翻天覆地的变化。该项目的目标是通过(1)公开来自Web数据源的高质量信息，将Web上的质量提升为一流公民；(2)通过称为质量协议（QAs）的直观集成框架，授权用户指定他们对不同质量维度（服务质量、数据质量、信息质量）的偏好；(3)根据用户偏好影响资源配置决策。为此，该项目重新检查了查询处理技术，以便考虑qa（即查询和更新调度、缓存和复制以及准入控制），并解决了新的挑战，这些挑战源于用户需要随着时间的推移适应qa及其协作能力。项目计划包括通过用户研究验证QA框架，对提议的算法进行分析和实验评估，以及原型开发。这项研究的实验方面与该项目的教育目标直接相关，并将为研究生，本科生和高中生提供许多参与新技术研究和开发的机会。这个项目将使用户能够根据自己的喜好定制Web上的质量，这反过来又会对Web 2.0应用程序的可用性以及用户的体验和满意度产生重大影响。这项研究的结果，包括软件、数据和出版物，将通过项目网站（http://db.cs.pitt.edu/user-centric）公开提供。

The Web has permeated every facet of human activity. Web 2.0 is bringing a sea-change, both by the amount of user-generated content and by the level of automation for information exchange. The goal of this project is to promote quality on the Web into a first-class citizen, by (1) exposing quality information from Web data sources; (2) empowering users to specify their preferences for the different dimensions of quality (Quality of Service, Quality of Data, Quality of Information) through an intuitive, integrated framework, called Quality Agreements (QAs); and (3) influencing resource allocation decisions according to user preferences.Towards this, the project reexamines query processing techniques in order to consider QAs (namely, query and update scheduling, caching and replication, and admission control) and addresses new challenges, stemming from the users' need to adapt QAs over time and their ability to collaborate. Project plans include the validation of the QA framework with a user-study, the evaluation of the proposed algorithms analytically and experimentally, and prototype development. The experimental aspects of this research are directly linked to the educational goals of this project and will generate many opportunities for graduate, undergraduate, and high-school students to participate in the research and development of new technologies. This project will empower users to tailor quality on the Web according to their preferences, which in turn can have great implications on the usability of Web 2.0 applications and on users' experience and satisfaction. Results of this research, including software, data, and publications, will be made publicly available via the project web site (http://db.cs.pitt.edu/user-centric).