real-world changes are generally discovered delayed by computer systems. the typical update patterns for traditional data warehouses on an overnight or even weekly basis enlarge this propagation delay until the inform...
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ISBN:
(纸本)0769512305
real-world changes are generally discovered delayed by computer systems. the typical update patterns for traditional data warehouses on an overnight or even weekly basis enlarge this propagation delay until the information is available to knowledge workers. the main contribution of the paper is the identification of two different temporal characterizations of the information appearing in a data warehouse: one is the classical description of the time instant when a given fact occurred, the other represents the instant when the information has been entered into the system. We present an approach for modeling conceptual time consistency problems and introduce a data model that deals withtimely delays and supports knowledge workers to determine what the situation was in the past, knowing only the information available at a given instant of time.
In this paper the authors propose a new architecture and new features for collaborative music composition. these design principles have been applied, without any loss of generality, to a system that has already been e...
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ISBN:
(纸本)0769512305
In this paper the authors propose a new architecture and new features for collaborative music composition. these design principles have been applied, without any loss of generality, to a system that has already been extensively tested on-line for the last three years, and which has allowed composers from around the world to participate in the collective creation of two important theatrical scores. they can constitute the basis for new approaches for collective composition on the Internet.
Emerging e-commerce applications typically use a Web server and CGI (Common Gateway Interface) for data processing. this client/server architecture is suitable when the Internet is not congested and the database serve...
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ISBN:
(纸本)0769512305
Emerging e-commerce applications typically use a Web server and CGI (Common Gateway Interface) for data processing. this client/server architecture is suitable when the Internet is not congested and the database server is not overloaded, but it may cause problems if congestion and overloading occur A certain class of DPS (Data Processing System), applications, such as order processing or sales reporting, do not require real-time response, so they may utilize email (Simple Mail Transport Protocol) or other protocols that allow delaying or relaying of data. In this paper, we, propose an innovative model of DPS (the Senddata System) that avoids congestion on the Internet and exploits a database server around the clock. Our model provides easy access to the database server and fits naturally in the middle tier of the three-tier model for database access, while providing performance and security. E-commerce applications may use our model in the presence of congestion on the Internet or unavailability of the server.
the state (public) information system (SIS) is the precondition of electronic government. SIS should provide all the services of the information systems of various offices and enable access of citizens to data without...
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ISBN:
(纸本)0769512305
the state (public) information system (SIS) is the precondition of electronic government. SIS should provide all the services of the information systems of various offices and enable access of citizens to data without any knowledge about the internal structure of SIS. It is very difficult to achieve it. the reasons are political conditions, power interests of various groups and offices, lobbying, system size, the necessity, to rise existing subsystems for a quite long time, etc. the only known feasible solution is the peer-to-peer network of autonomous components (software confederation). It has not been recognized yet although there are good tools for the development software confederations (XML, Internet). Due to bad practices of the development of SIS is usually very slow and the properties of it are far from needs. We shall discuss the software engineering properties of software confederations and the consequences for management of SIS. the principles of confederations are very simple but they are very difficult to apply them consistently.
During their lifetimes, enterprises have been storing and maintaining huge amounts of business and operational information. As time passed their information repositories grown almost exponentially and they have typica...
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ISBN:
(纸本)0769512305
During their lifetimes, enterprises have been storing and maintaining huge amounts of business and operational information. As time passed their information repositories grown almost exponentially and they have typically got "drown" in data. So, they felt the urge for more suitable systems, capable of gathering, treating and storing this data avalanche in appropriated manners. therefore, it is necessary to conceive and implant adequate analytical systems, capable of dealing withthis huge potential of information in the best way, and providing new knowledge about the activities of organizations. Taking these real scenarios into account, we designed and developed a multi-agent system specially conceived to support knowledge extraction processes over data warehousing systems, covering the definition and preparation of the data repositories to be mined, till the visualization and manipulation of the results.
this paper presents the evaluation of a non-blocking, decoupled memory/execution, multithreaded architecture known as the Scheduled Dataflow (SDF). the major recent trend in digital signal processor (DSP) architecture...
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the integration of voice and data networks poses a great challenge for today's internetworking environment. Voice traffic, being real-time in nature, demands compliance to a very rigid set of QoS issues. these iss...
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Internet, Value Added Network (VAN) and Electronic Data Interchange (EDI) had revolutionized global trade and services. We have emerged to a new experience of global virtual market where trading could be carried out i...
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ISBN:
(纸本)0769512305
Internet, Value Added Network (VAN) and Electronic Data Interchange (EDI) had revolutionized global trade and services. We have emerged to a new experience of global virtual market where trading could be carried out in cyberspace. As electronic markets are possible for small and large enterprises competing as equal players, Business-to-business (B2B) and Business-to-Consumers (B2C) via electronic Commerce (e-Commerce) systems operating On Internet are producing profound changes in enterprise culture on a global basis. Financial institutions and retail business in Asia are believed to be falling far behind the US and Europe when it comes to using the Internet for business. Despite the cultural and environmental differences in marketing between west and east, this reality has provided a vision for the second generation of e-Commerce application developers to learn the issues that had been experienced by these pioneer companies whom had participated in e-Commerce for a while. Indeed, over the heat of e-Commerce, companies are now thinking big and acting small in developing their e-Commerce applications. they are willing to tactfully slow down their pace in transforming business to electronic-Business (e-Business) via BPR (Business Process Reengineering). Investing extra time and cost in securing their business, instead of getting into pre-mature commitment in e-business applications development which is not going to last long or with huge difficulties in maintenance. this paper provide an outline of our investigation. on the issues in developing e-stores and identified the crucial constitution in developing a successful e-Commerce system while proposing a model for traditional industry to establish its electronic or virtual stores. We analyze the development process between traditional and electronic stores to help business to plan on new process. the contribution of this research is a novel approach embedded in a unique model for establishing e-stores (electronic Stor
It is important to support updates in federated database systems. However, not all updates on the federated schema are possible because some may violate certain constraints in the local databases which are involved in...
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Many concurrency control algorithms for distributed real-time database systems have been proposed. But there isn’t a representative concurrency control algorithm for replication environment. In this paper, we propose...
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