TAILIEUCHUNG - Active Database Systems by NORMAN W. PATON

As Cigarette Use Declines, Tobacco Industry Follows the Money to Other Tobacco Products In August, CDC released results of the 2011 National Youth Tobacco Survey which found youth cigarette use continues to decline and now stands at percent among high school students and percent among middle school students. These reductions can be attributed to implementing the evidence- based policies proven to reduce tobacco use evaluated in “State of Tobacco Control.” These include increasing tobacco taxes, passing comprehensive smokefree laws, helping smokers quit and investing in tobacco prevention programs. . | Active Database Systems NORMAN W. PATON University of Manchester AND OSCAR DIAZ University of the Basque Country Active database systems support mechanisms that enable them to respond automatically to events that are taking place either inside or outside the database system itself. Considerable effort has been directed towards improving understanding of such systems in recent years and many different proposals have been made and applications suggested. This high level of activity has not yielded a single agreed-upon standard approach to the integration of active functionality with conventional database systems but has led to improved understanding of active behavior description languages execution models and architectures. This survey presents the fundamental characteristics of active database systems describes a collection of representative systems within a common framework considers the consequences for implementations of certain design decisions and discusses tools for developing active applications. Categories and Subject Descriptors Database Management Languages General Terms Languages Additional Key Words and Phrases Active databases events object-oriented databases relational databases 1. INTRODUCTION Traditionally database systems have been viewed as repositories that store the information required by an application and that are accessed either by user programs or through interactive interfaces. In such a context a range of different tools and systems are used together to support the requirements of the application. However database systems are beginning to be applied to a range of domains associated with highly complex information processing ever more substantial quantities of data or highly stringent performance requirements in which the conventional multicomponent environment has proved to be unsatisfactory. This has resulted in a We are pleased to acknowledge the support of the European Union Human Capital and Mobility Network ACT-NET the UK .

TỪ KHÓA LIÊN QUAN
TAILIEUCHUNG - Chia sẻ tài liệu không giới hạn
Địa chỉ : 444 Hoang Hoa Tham, Hanoi, Viet Nam
Website : tailieuchung.com
Email : tailieuchung20@gmail.com
Tailieuchung.com là thư viện tài liệu trực tuyến, nơi chia sẽ trao đổi hàng triệu tài liệu như luận văn đồ án, sách, giáo trình, đề thi.
Chúng tôi không chịu trách nhiệm liên quan đến các vấn đề bản quyền nội dung tài liệu được thành viên tự nguyện đăng tải lên, nếu phát hiện thấy tài liệu xấu hoặc tài liệu có bản quyền xin hãy email cho chúng tôi.
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.