C. Rolland - Academia.edu (original) (raw)

Papers by C. Rolland

2009 17th IEEE International Requirements Engineering Conference, 2009

Invited Talks: Object Databases: Connectivity with Relational Systems and ODMG Standard Standardi... more Invited Talks: Object Databases: Connectivity with Relational Systems and ODMG Standard Standardisation for OO A&D?- Modelling Issues 1: A characterisation of Aggregation. Object-Orientated Hierarchies and their Resulting Complex Systems. Multiple Viewpoints of IS-A Inheritance Hierarchies through Normalisation and Denormalisation Mechanisms.- Queries and Views: Deductive Queries in ODMG Databases: the DOQL Approach. Incremental Maintenance of Materialised Path Query Views. A Multidatabase Layer for the ODMG Object Model Reuse. The Re-Use of Multimedia Objects by Software Agents in the Kimsac System. Design Patterns as Litmus paper to Test the Strength of Object-Orientated Methods. Reuse by Appropriation of Software Elements in Information Systems. Improving Productivity in Building Data-Orientated Information Systems - Why Object Frameworks are not Enough.- Method Issues 1: "The Truth Is Out There?": A Survey of Business Objects. Patterns for Extending an OO Model with Temporal Features. Design Issues 1. Representation of Multi-Level Composite Objects in Relational Databases. Complex Methods of Class Allocation in Distributed OODBSs.- Modelling Issues 2: Specialisation of Object Lifecycles. An Enhanced Definition of Composition and its use for Abstraction. How to Introduce Emergence in Object Evolution. Evolution and Interoperability. Defining Rules for Schema Transformation. Ontology of Object-Orientated Database Evolution. Capacity-Augmenting Schema Changes on Object-Orientated Databases: Towards Increased Interoperability.- Method Issues 2: Model Engineering Using Charts of Concepts: Application to the Model of the UML. A CASE Tool for the Modelling of Methods and Information Systems. A Semi-Automatic Process for Identifying Overlaps and Inconsistencies between Requirement Specifications.- Design Issues 2: Consistency Analysis Lifecycle Model and Interaction Model. Subjective Method Interpretation of Object-Orientated Modelling. Composition of UML Design Models: A Tool to Support the Resolution of Conflicts. Panel: OO Trends and Perspectives. An Object-Orientated Architecture Model for International Information Systems? An Exploratory Study. A Perspective on Foundations of Object-Orientated Information Systems.

Information and Software Technology, 1990

Lecture Notes in Computer Science

This paper presents the interim results of a research project aimed at the prototyping of an auto... more This paper presents the interim results of a research project aimed at the prototyping of an automatic tool, Rubis, to aid in the development of, validate and correct the conceptual specification of information systems. The Rubis systems allows a designer to specify an information system using the Proquel language and to subsequently execute the specification in order to prototype the design. We present the control rules which enable the diagnosis of the final specification, called an R-Schema, and describe the help available to assist the designer in correcting mistakes and anomalies detected during the diagnosis.

Technologies logicielles Architectures des systèmes

1 Introduction 1.1 Notion de base de donnees 1.2 Objectifs assignes a une base de donnees ... more 1 Introduction 1.1 Notion de base de donnees 1.2 Objectifs assignes a une base de donnees 1.3 Imperatifs de la conception d'une base de donnees 1.4 Etapes de la conception 2 Etape conceptuelle 2.1 Objectif 2.2 Procede de conceptualisation 2.3 Analyse 2.31 Modele d'analyse de la realite 2.32 Construction du schema descriptif d'une realite 2.33 Exemple 2.4 Conceptualisation 2.41 Principe de conceptualisation 2.42 Modele conceptuel 2.43 Methode de conceptualisation 2.5 Conclusion sur la structuration conceptuelle 3 Etape logique 3.1 Objectif 3.2 Construction du schema logique de donnees 3.21 Entrees de l'etape logique 3.22 Phases de la methode 3.23 Construction du schema logique de donnees standard 3.24 Construction du schema logique de donnees specifique 3.3 Construction du schema transactionnel 3.31 Entrees de l'etape logique 3.32 Phases de la methode 3.33 Construction du schema transactionnel minimal 3.34 Construction du schema transactionnel adapte 3.4 Commentaires sur la structuration logique 4 Conclusion Bibliographie

Proceedings of the 2010 Conference on New Trends in Software Methodologies Tools and Techniques Proceedings of the 9th Somet_10, 2010

... 5. T. Bodhuin, R. Esposito, C. Pacelli and M. Tortorella. Impact Analysis for Supporting the ... more ... 5. T. Bodhuin, R. Esposito, C. Pacelli and M. Tortorella. Impact Analysis for Supporting the Co-Evolution of Business Processes and Supporting Software Systems. ... 13. C. Delgado, J. Samos and M. Torres. Primitive Operations for Schema Evolution. ...

Informatik-Fachberichte, Sep 30, 1980

Our research goal is in information system (IS) design and management (the REMORA project). In th... more Our research goal is in information system (IS) design and management (the REMORA project). In the first instance, we were interested in the definition of a model of IS design. This model allows a complete representation of real world phenomena. It integrates at the conceptual level data, processes and dynamics in the design of IS. We set forth this model in the first part of this paper. In the second instance, we try to define a system of tools allowing IS definition, creation and functionning compatible with the general model previously defined. We present the dynamics automaton which manages the IS evolving in the course of time in the second part of this paper.

Integrated Photonics Research, 1996

Semiconductor external modulators are increasingly employed in high speed and long haul optical f... more Semiconductor external modulators are increasingly employed in high speed and long haul optical fiber communication. A highly desirable feature of an external light modulator is the ability to generate a signal with a negative frequency chirp. Mach-Zehnder (MZ) III-V multiple-quantum-well (MQW) modulators are thus increasingly attractive relative to other modulator designs because of their adjustable frequency chirp, low drive voltage, small size, long term reliability and potential for integration with laser sources[l, 2, 3, 4], Unfortunately, in III-V MQW MZ modulators where the two arms of the interferometer are of equal length and the power splitting ratio 50%, the nonlinear electrooptic effect imparts a small positive chirp under symmetric push-pull operation. While negative chirp can be induced by designing the Y-junction to inject less optical power into the more deeply biased modulator arm and employing a small amount of overdrive, [5] the back-to-back extinction ratio is degraded. In this paper we demonstrate that by increasing the length of one of the modulator arms such that the transmitted optical signal is shifted by π relative to the other arm, an optimal chirp can be obtained while maintaining a high extinction ratio.

2008 Second International Conference on Research Challenges in Information Science, 2008

Over the last decade, a large number of Method Engineering (ME) approaches have been developed to... more Over the last decade, a large number of Method Engineering (ME) approaches have been developed to adapt information system methods (ISM) to specific situations of projects at hand. However, ME has not been yet, widely spread in the professional world. Our belief is that limitations such as the lack of standards, the proposal of proprietary solutions and an excessive emphasis

Presentation d'une interface en langage naturel dans un outil logiciel d'aide a la concep... more Presentation d'une interface en langage naturel dans un outil logiciel d'aide a la conception des systemes d'information, OICSI. La conception de l'interface s'est faite a partir d'une approche linguistique

ELEKTRA Research Report, ESPRIT Programme 7.1 Project No. 22927, 118 page

2009 17th IEEE International Requirements Engineering Conference, 2009

Invited Talks: Object Databases: Connectivity with Relational Systems and ODMG Standard Standardi... more Invited Talks: Object Databases: Connectivity with Relational Systems and ODMG Standard Standardisation for OO A&D?- Modelling Issues 1: A characterisation of Aggregation. Object-Orientated Hierarchies and their Resulting Complex Systems. Multiple Viewpoints of IS-A Inheritance Hierarchies through Normalisation and Denormalisation Mechanisms.- Queries and Views: Deductive Queries in ODMG Databases: the DOQL Approach. Incremental Maintenance of Materialised Path Query Views. A Multidatabase Layer for the ODMG Object Model Reuse. The Re-Use of Multimedia Objects by Software Agents in the Kimsac System. Design Patterns as Litmus paper to Test the Strength of Object-Orientated Methods. Reuse by Appropriation of Software Elements in Information Systems. Improving Productivity in Building Data-Orientated Information Systems - Why Object Frameworks are not Enough.- Method Issues 1: "The Truth Is Out There?": A Survey of Business Objects. Patterns for Extending an OO Model with Temporal Features. Design Issues 1. Representation of Multi-Level Composite Objects in Relational Databases. Complex Methods of Class Allocation in Distributed OODBSs.- Modelling Issues 2: Specialisation of Object Lifecycles. An Enhanced Definition of Composition and its use for Abstraction. How to Introduce Emergence in Object Evolution. Evolution and Interoperability. Defining Rules for Schema Transformation. Ontology of Object-Orientated Database Evolution. Capacity-Augmenting Schema Changes on Object-Orientated Databases: Towards Increased Interoperability.- Method Issues 2: Model Engineering Using Charts of Concepts: Application to the Model of the UML. A CASE Tool for the Modelling of Methods and Information Systems. A Semi-Automatic Process for Identifying Overlaps and Inconsistencies between Requirement Specifications.- Design Issues 2: Consistency Analysis Lifecycle Model and Interaction Model. Subjective Method Interpretation of Object-Orientated Modelling. Composition of UML Design Models: A Tool to Support the Resolution of Conflicts. Panel: OO Trends and Perspectives. An Object-Orientated Architecture Model for International Information Systems? An Exploratory Study. A Perspective on Foundations of Object-Orientated Information Systems.

Information and Software Technology, 1990

Lecture Notes in Computer Science

This paper presents the interim results of a research project aimed at the prototyping of an auto... more This paper presents the interim results of a research project aimed at the prototyping of an automatic tool, Rubis, to aid in the development of, validate and correct the conceptual specification of information systems. The Rubis systems allows a designer to specify an information system using the Proquel language and to subsequently execute the specification in order to prototype the design. We present the control rules which enable the diagnosis of the final specification, called an R-Schema, and describe the help available to assist the designer in correcting mistakes and anomalies detected during the diagnosis.

Technologies logicielles Architectures des systèmes

1 Introduction 1.1 Notion de base de donnees 1.2 Objectifs assignes a une base de donnees ... more 1 Introduction 1.1 Notion de base de donnees 1.2 Objectifs assignes a une base de donnees 1.3 Imperatifs de la conception d'une base de donnees 1.4 Etapes de la conception 2 Etape conceptuelle 2.1 Objectif 2.2 Procede de conceptualisation 2.3 Analyse 2.31 Modele d'analyse de la realite 2.32 Construction du schema descriptif d'une realite 2.33 Exemple 2.4 Conceptualisation 2.41 Principe de conceptualisation 2.42 Modele conceptuel 2.43 Methode de conceptualisation 2.5 Conclusion sur la structuration conceptuelle 3 Etape logique 3.1 Objectif 3.2 Construction du schema logique de donnees 3.21 Entrees de l'etape logique 3.22 Phases de la methode 3.23 Construction du schema logique de donnees standard 3.24 Construction du schema logique de donnees specifique 3.3 Construction du schema transactionnel 3.31 Entrees de l'etape logique 3.32 Phases de la methode 3.33 Construction du schema transactionnel minimal 3.34 Construction du schema transactionnel adapte 3.4 Commentaires sur la structuration logique 4 Conclusion Bibliographie

Proceedings of the 2010 Conference on New Trends in Software Methodologies Tools and Techniques Proceedings of the 9th Somet_10, 2010

... 5. T. Bodhuin, R. Esposito, C. Pacelli and M. Tortorella. Impact Analysis for Supporting the ... more ... 5. T. Bodhuin, R. Esposito, C. Pacelli and M. Tortorella. Impact Analysis for Supporting the Co-Evolution of Business Processes and Supporting Software Systems. ... 13. C. Delgado, J. Samos and M. Torres. Primitive Operations for Schema Evolution. ...

Informatik-Fachberichte, Sep 30, 1980

Our research goal is in information system (IS) design and management (the REMORA project). In th... more Our research goal is in information system (IS) design and management (the REMORA project). In the first instance, we were interested in the definition of a model of IS design. This model allows a complete representation of real world phenomena. It integrates at the conceptual level data, processes and dynamics in the design of IS. We set forth this model in the first part of this paper. In the second instance, we try to define a system of tools allowing IS definition, creation and functionning compatible with the general model previously defined. We present the dynamics automaton which manages the IS evolving in the course of time in the second part of this paper.

Integrated Photonics Research, 1996

Semiconductor external modulators are increasingly employed in high speed and long haul optical f... more Semiconductor external modulators are increasingly employed in high speed and long haul optical fiber communication. A highly desirable feature of an external light modulator is the ability to generate a signal with a negative frequency chirp. Mach-Zehnder (MZ) III-V multiple-quantum-well (MQW) modulators are thus increasingly attractive relative to other modulator designs because of their adjustable frequency chirp, low drive voltage, small size, long term reliability and potential for integration with laser sources[l, 2, 3, 4], Unfortunately, in III-V MQW MZ modulators where the two arms of the interferometer are of equal length and the power splitting ratio 50%, the nonlinear electrooptic effect imparts a small positive chirp under symmetric push-pull operation. While negative chirp can be induced by designing the Y-junction to inject less optical power into the more deeply biased modulator arm and employing a small amount of overdrive, [5] the back-to-back extinction ratio is degraded. In this paper we demonstrate that by increasing the length of one of the modulator arms such that the transmitted optical signal is shifted by π relative to the other arm, an optimal chirp can be obtained while maintaining a high extinction ratio.

2008 Second International Conference on Research Challenges in Information Science, 2008

Over the last decade, a large number of Method Engineering (ME) approaches have been developed to... more Over the last decade, a large number of Method Engineering (ME) approaches have been developed to adapt information system methods (ISM) to specific situations of projects at hand. However, ME has not been yet, widely spread in the professional world. Our belief is that limitations such as the lack of standards, the proposal of proprietary solutions and an excessive emphasis

Presentation d'une interface en langage naturel dans un outil logiciel d'aide a la concep... more Presentation d'une interface en langage naturel dans un outil logiciel d'aide a la conception des systemes d'information, OICSI. La conception de l'interface s'est faite a partir d'une approche linguistique

ELEKTRA Research Report, ESPRIT Programme 7.1 Project No. 22927, 118 page