Peretz Shoval

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An abundant amount of information is created and delivered over electronic media. Users risk becoming overwhelmed by the flow of information, and they lack adequate tools to help them manage the situation. Information filtering (IF) is one of the methods that is rapidly evolving to manage large information flows. The aim of IF is to expose users to only(More)
We compare EER and OO data models from the point of view of design quality. Quality is measured in terms of (a) correctness of the conceptual schemas being designed, (b) time to complete the design task, and (c) designers' preferences of the models. Result of an experimental comparison of the two models reveal that the EER model surpasses the OO model for(More)
Users’ requirements of an information system are modeled in the analysis phase of the development process. The requirements can be modeled with various modeling methods. In this study, we compare two alternative methods for modeling the functional requirements: one is the UML Use Case (UC) model; the other is OO-DFD transaction (Object-Oriented DFD is a(More)
INTRODUCTION Many paradigms for system analysis and design have been proposed over the years. Early approaches have advocated the functional approach. Common methodologies that support this approach are Structured System Analysis (SSA) and Structured System Design (SSD) (DeMarco, 1978; Yourdon & Constantine, 1979). SSA is based on the use of data flow(More)
Entity relationship (ER) schemas include cardinality constraints, that restrict the dependencies among entities within a relationship type. The cardinality constraints have direct impact on the application maintenance, since insertions or deletions of entities or relationships might affect related entities. Indeed, maintenance of a system or of a database(More)
In information filtering (IF) systems, user long-term needs we expressed as user profiles. The quality of a user profile has a major impact on the performance of IF systems. The focus of the proposed research is on the study of user profile generation and update. The paper introduces methods for user profile generation, and proposes a research agenda for(More)