14756826
Framework description using concern-specific design patterns composition
This paper proposes an approach to object-oriented framework description. Frameworks are described using concern-speci c design patterns and their composition. The frameworks understandability is achieved by the separate description of concern variations and by the description of inter-concern combinations of those variations. Both descriptions are independent of implementation details. The technical innovations are based on using design patterns for describing concern variations and on using design patterns compositions for describing variations compositions.
203567
Separating replication from distributed communication: problems and solutions
Replication and distributed communication are usually tightly coupled. This code tangling forbids their independent reuse and adaptation. In this position paper, the problems resulting from coupling replication with distributed communication are discussed. In addition, a solution based on separation of concerns is proposed. The abstractions for each concern are presented, as well as their composition.
38014527
A Quality Design Solution for Object Synchronization
This paper presents a quality design solution, the Customizable Object Synchronization pattern, for object synchronization which decouples object synchronization from object concurrency and object functionality (sequential part). The solution described by this pattern provides encapsulation, extensibility, modularity and reuse of synchronization policies.
11562802
A Decision Support System for IST Academic Information
This article describes the Decision Support System (DSS) for Academic Information being developed at Instituto Superior Tecnico, the Engineering School of the Technical University of Lisbon. In Portuguese, this project has been given the acronym SADIA (Sistema de Apoio a Decisao da Informacao Academica). This paper focuses on the early phases of the DSS development process, i.e., the business requirements definition and the dimensional modelling. First, we show how the business requirements of the School drive the definition of the DSS dimensional model. Second, we detail the logical dimensional model for a selected business process, the IST Student Admission process. Third, the corresponding physical design decisions are reported. The results obtained from the three phases were successfully validated by business users.
35073381
Service Logic Deployment and Distribution Configuration
The success of service providers in the competitive communications market of the future will be determined by the efficiency with which services are developed, and the quality levels at which services are provided. A service creation environment (SCE) should provide the service developer with solutions to these problems. In this paper we present two essential facilities that should be provided by an advanced SCE: a tool for the optimisation of the service logic deployment scheme and a distribution configuration language supporting the deployment and configuration of component-based distributed applications.
16566221
Naming: design pattern and framework
Naming is an important, but frequently overlooked, aspect of software systems. Naming is usually combined with other issues, e.g. distributed communication technology. The paper treats naming in isolation. It presents a naming design pattern which abstracts several naming policies and an object-oriented framework that can be customized to support naming policies. An applications designer can choose the correct naming properties (relative, absolute, universal identifiers, etc.) to refer to specific objects.
1133493
A methodological framework for generic conceptualisation: problem-sensitivity in software engineering
Abstract The first step towards developing quality software is to conceptually model the problem raised in its own context. Software engineering, however, has traditionally focused on implementation concepts, and has paid little or no attention to the problem domain. This paper presents a generic methodological framework to guide conceptual modelling, focusing on the problem within its domain. This framework is defined considering aspects related to a generic conceptualisation, and its application to software engineering—illustrated using the IFIP Case—achieves the called-for problem-sensitivity.
30725726
An integrated MOLP method base package - A guided tour of tommix
Abstract An implementation of a MOLP interactive method base is presented in the form of a guided tour to a computer package. The MOLP method base (associated to a procedure toolbox) is a component of a decision support system framework which also integrates a dialogue base and a data management module. Besides providing the standard working of each method the interactive MOLP method base offers the possibility of method switching at any interaction with the decision maker (DM), in order to make the most of the potentialities of each method and support a “learning” process. Some key issues in the development of interactive MOLP approaches and computational tools are also discussed. Special attention is paid to the development of an user-friendly environment for interacting with the DM.
5929323
Agent-based modelling of product invention
This study describes a novel simulation model of the process of product invention. Invention is conceptualized as a process of directed evolutionary adaptation, on a landscape of product design possibilities, by a population of profit-seeking agents (inventors). The simulation experiments examine the sensitivity of the rate of advance in product fitness to the choice of search heuristics employed by inventors. The key finding of the experiments is that if search heuristics are confined to those which are rooted in past experience, or to heuristics which merely generate variety, limited product advance occurs. Notable product fitness advance only occurs when inventor's expectations as to the relative fitness of potential product inventions are incorporated into the model of invention. The results demonstrate the importance of human direction and expectations in invention. They also support the importance of formal product / project evaluation procedures in organizations, and the importance of market information when inventing new products.
8450178
Information Retrieval Aware Web Site Modelling and Generation
Design and maintenance of large corporate Web sites have become a challenging problem due to the continuing increase in their size and complexity. One particular feature present in the majority of this sort of Web sites is searching for information. However the solutions provided so far, which is based on the same techniques used for search in the open Web, have not provided a satisfactory performance to specific Web sites, often resulting in too much irrelevant content in a query answer. This paper proposes an approach to Web site modelling and generation of intrasite search engines, combining application modelling and information retrieval techniques. Our assumption is that giving search engines access to the information provided by conceptual representations of the Web site improves their performance and accuracy. We demonstrate our proposal by describing a Web site modelling language that represent both traditional modelling features and information retrieval aspects, as well as presenting experiments to evaluate the resulting intrasite search engine generated by our method.
2626702
A Particle Swarm Model of Organizational Adaptation
This study introduces the particle swarm metaphor to the domain of organizational adaptation. A simulation model (OrgSwarm) is constructed to examine the impact of strategic inertia, in the presence of errorful assessments of future payoffs to potential strategies, on the adaptation of the strategic fitness of a population of organizations. The results indicate that agent (organization) uncertainty as to the payoffs of potential strategies has the affect of lowering average payoffs obtained by a population of organizations. The results also indicate that a degree of strategic inertia, in the presence of an election mechanism, assists rather than hampers adaptive efforts in static and slowly changing strategic environments.