Submited Papers Abstracts

Writers' Workshop
#	Author	Title	Language	Abstract
1	Mohamed E. Fayad, Haitham S. Hamza	The Trust Analysis Pattern	English	In this paper, we propose the Trust stable analysis pattern. The objective of this pattern is to provide a conceptual model that embodies the main aspects of the trust concept. The level of abstraction of the Trust pattern makes the pattern applicable for wide spectrum of applications.
2	Haitham S. Hamza, Mohamed E. Fayad,	An Architectural Pattern for Developing Renting Systems	English	Despite the fact that renting is, to some extend, an application dependent activity, it is still possible to extract many fundamental common aspects that if captured in an appropriate conceptual level, a stable renting model can be developed and reused to build a wide range of renting systems. In this paper we propose an architectural pattern that model the renting problem. This pattern aims to provide a model that captures the core aspects of the renting problem independent of any specific application or domain. We demonstrate, through illustrated examples, the usage of the proposed pattern under different renting scenarios in different applications.
3	Mohamed E. Fayad, Haitham S. Hamza, Valerie Stanton	The Searching Analysis Pattern	English	This paper introduces the Searching analysis pattern. The pattern presents the core concept of the searching independent of a specific application. This pattern has been developed based on the concepts of Stable Analysis Patterns we introduced in [1, 2,3]. Stable analysis patterns are built based on the concepts of software stability introduced in [5, 6, and 7]. The paper provides detailed documentation of the proposed Searching pattern.
4	Marcos Cordeiro d'Ornellas	A Sequential Pattern	English	This paper disuss discuss the general class of algorithms that can be implemented using sequential constructions. Common characteristics of these algorithms are also described in order to provide a generic representation for sequential algorithms. In addition it describes the sequential pattern in terms of pixel scans and its relationship within mathematical morphology. Such a pattern is essential for the development of morphological operators and operations. Examples of pattern usage are the distance tranform, reconstruction, extrema detection, minima imposition and so on.
5	Vinko Vrsalovic, Yadran Eterovic	Towards a pattern language on the Geographic Information Systems (GIS) domain	English	We document three patterns on the GIS domain. We also show the relationships we have found among these patterns and a collection of already documented (but isolated) patterns, with the intent to establish a foundation for a pattern language on this domain.
6	Maria Lencastre, Felix C. G. Santos	Computational Phenomenon Pattern	English	This paper presents a pattern called Computational Phenomena Pattern, whose objective is to standardize the complex model of coupled computational physical phenomena and to make intuitive and easier the representation of data sharing and dependence between different phenomena.
7	Eduardo Almeida, Alexandre Alvaro, Daniel Lucrédio, Vinicius Garcia, Eduardo Piveta	Student’s PLoP Guide: A Pattern Family to Guide Computer Science Students during PLoP Conferences	English	This paper presents a pattern family to help inexperienced students in participating in PLoP conferences. The patterns describe different situations that may occur during a conference, and how the student must act in these cases. Finally, the paper present how these patterns relate to each other, forming a complete PLoP guide.
8	Vinicius Garcia, Daniel Lucrédio, Antonio Francisco do Prado, Eduardo Piveta, Luiz Zancanella, Alexandre Alvaro, Eduardo de Almeida	Manipulating Crosscutting Concerns	English	The proposed patterns presented in this paper describe how to identify, during a reengineering process, the main crosscutting concerns presented in the literature in order to isolate them using the Aspect-Oriented Programming (AOP).
9	Alessandro Garcia, Uirá Kulesza, Cláudio Sant’Anna, Carlos Lucena	The Mobility Aspect Pattern	English	Software engineers of multi-agent systems (MASs) are faced with the design and implementation of the mobility concern in addition to the agents’ basic functionalities and other agent-related concerns. As the agents’ complexity increases, the mobility concern cannot be modularized based only on object-oriented abstractions. MAS developers however have relied mostly on object-oriented design techniques and on object-oriented programming languages, such as Java. As the agent complexity increases, the mobility concern tends to spread across several system classes at the design and implementation levels. It often leads to a poor separation of agent concerns in the software system, and in turn to the production of MASs that are difficult to maintain and reuse. This paper presents the Mobility Aspect pattern, which documents an aspect-oriented solution for the modularization of the mobility concern. The use of this pattern minimizes code replication as well as increase the reusability and maintainability of the mobility concern and other agent concerns.
10	José A. R. P. Sardinha, Alessandro Garcia, Carlos J. P. Lucena, Ruy L. Milidiú	The Agent Learning Pattern	English	The development of large scale multi-agent systems (MASs) requires the introduction and structuring of the learning property throughout the design and implementation stages. In open systems and complex environments, agents have to reason and adapt through machine learning techniques in order to perform their goals. In this paper, we present the Learning design pattern that guides the organization of the learning property to object oriented design. The pattern is used in the construction of an open MAS for the Trading Agent Competition environment in order to illustrate the application of the presented pattern.
11	M. E. Fayad, Rohini Pradeep	A Pattern Language for Performance Evaluation	English	This paper deals with the pattern language for Performance Evaluation, which is a cognitive process involved in producing and understanding different concepts of patterns in this discipline. It explains how this language can be used to obtain the relationship between certain stable patterns, which exhibit a rich set of behaviors capable of handling features that are reusable, adaptable, and maintainable with minimal modifications. The goal of this paper is to overcome the issues with “forgettable” systems. The proposed solution is not intended to replace existing systems, rather, the effort is to define and provide a new methodology for designing such systems with a rich set of patterns for performance evaluation that can be used efficiently.
12	M. E. Fayad, Huáscar A. Sánchez, and Gaston R. Cangiano	Stable Automation Pattern	English	One of the biggest challenges in the field of Software Engineering is that of the automation of complex systems. At the core of this challenge are the questions of “what”, “where” and “how much” to automate in any given system. The concept of automation is pervasive across all domains. Therefore this paper will attempt to produce an analysis pattern that will be applicable wherever automation is present in a system. To do so, we will build on the “Software Stability Model” (SSM) [1,9] of analysis to identify and isolate the core knowledge of the “automation” concept. A set of scenarios will be presented where our pattern is put into action, showing real-world applicability and reusability.
13	Dario André Louzado	Controle a Complexidade do Código	Portuguese	Software development teams face challenges involving schedule, demands imposed by non-functional requirements, architectural styles and constraints as well as good coding practices. To ensure software delivery on time, on budget and under quality specifications, a series of initiatives are taken by the development team. In particular, to control code complexity means to collect systematic feedback about program structure, internal organization and source code quality attributes. This feedback process produces inputs to the refactoring plan in the short and long term, allowing the atenuation of software ownership cost during its whole life cycle. There is also a strong interaction among this pattern and others from James O.Coplien Organization Patterns.
14	Anderson Pazin, Rosângela Penteado e Paulo Masiero	SiGCli: Uma Linguagem de Padrões para Gerenciamento de Clínicas de Reabilitação	Portuguese	A pattern language for the domain of Management Systems of rehabilitation Clinics (SiGCli, Sistema de Gerenciamento de Clínicas, in portuguese) is presented. It was elaborated from a reverse engineering process of legacies systems, with the study of the domain, that can be considered a sub-domain of business resources management, and the definition of the patterns for this language. The use of the SiGCli helps the systems development to follow and refer to the evolution of a person who looks to one specific type of rehabilitation treatment or to improve its physical conditions. The pattern language is applied in one of the legacies systems that had conducted the study of the domain and its classes diagram is presented.
15	Gabriela T. De Souza, Carlo Giovano S. Pires	PATI-MVC: Uma Família de Padrões para Sistemas de Informação baseada no padrão MVC	Portuguese	Information systems are based on registering, searching, and maintaining data. Usually, they have simple functionality, but these functions are repeated several times within an information system. The aim of PATI-MVC patterns is to present design solutions for recurrent problems in searching and data maintainance in information systems.
16	Jonivan Lisbôa, Orlando Loques	Um Padrão Arquitetural para Gerenciamento de Qualidade de Serviço em Sistemas Distribuídos	Portuguese	Some kind of component-based systems often have strict quality-of-service (QoS) requirements and are deployed in environments in which resource constraints are dinamic and impredictable. Such systems must adapt themselves to changes in quality of offered service, needing some kind of mechanism to describe required quality levels. Many approaches give a similar treatment to the problem, offering architectural solutions composed by elements with suchlike functions. Such fact did make possible to propose in this work an architectural pattern for quality management in systems with differentiated quality of service requirements.
17	Leandro Sales Holanda Pinto, Roberto R. Costa Lima Jr e Rossana Andrade	Back Navigator	Portuguese	WEB applications needs a way to go back to the last page. Sometimes, that task isn´t so easy for developers. The main reason is that pages can be reached from different ways, and the easiest solution (use the back button provided by the browser, for example) cannot be applied in the most of cases. This pattern brings a solution for the problem described above using the idea that instead of trying to discover who calls the current page, the current page will inform the next page where it will go back when required.
18	Ismênia Ribeiro de Oliveira, Leandro Balby, Rosario Girardi	Padrões baseados em agentes para a Modelagem de Usuários	Portuguese	User models are of great importance for the development of adaptive systems. These models capture relevant user features that are used by these systems to satisfy, in a personalized way, the great diversity of users. The agent technology has been used with success in the development of adaptive systems because of the software agent features (autonomy, sociability and learning ability). To promote reuse during the development of agent-based adaptive systems is necessary the creation of patterns that capture common practices about the process of construction of such systems. This paper introduces an agent-oriented design pattern for user modeling.
Special Session: Software Pattern Applications (SPA)
#	Author	Title	Language	Abstract
1	Ismênia Ribeiro de Oliveira, Rafael de Sousa Neto, Rosario Girardi	Uma Ontologia para a Especificação de Sistemas de Padrões	Portuguese	With the growth of the available number of pattern systems and their reuse on the development of applications, there is a need of formalisms to represent pattern systems to facilitate the description, reuse and location of patterns in these systems. An approach to standardize and to facilitate the writing and reuse of patterns systems is the use of ontologies. This paper introduces the ONTO-PATTERN, an ontology for the specification of pattern systems.
2	Ricardo Argenton Ramos, Valter Vieira de Camargo, Rosângela Penteado, Paulo Cesar Masiero	Reuso da Implementação Orientada a Aspectos do Padrão de Projeto Camada de Persistência	Portuguese	This paper relates a reuse experience of the aspect-oriented implementation of the Persistence Layer pattern in an inventory system that was used as case study. This implementation was developed in the AspectJ language in a previous work, aiming to separate the functional code from persistency code. The case study system is implemented in the object-oriented paradigm, in Java, and uses the Persistence Layer pattern. To reuse the aspect-oriented implementation was necessary to identify and to remove the objectoriented code of the pattern, what was done by means of regular expressions. It was noticed that the aspect-oriented reuse process is simpler than the object-oriented and benefits are perceived in the target system.
3	Thiago Santos, Rodrigo Ramos e Börje Karlsson	Usando Padrões para Reestruturação de uma Aplicação Legada	Portuguese	This paper describes the experience of restructuring a real tool for cell phone testing. New system requirements, have lead us to the problem of restructuring the application in order to fulfill the required changes. This effort involved the use of coding, design and architectural patterns. The focus of this paper is in the application of design patterns to remodel the legacy application permitting easy software maintainance and a high degree of reusability, minimizing future tool developers efforts.