Barbara Pernici | Politecnico di Milano (original) (raw)

Papers by Barbara Pernici

IEEE Data Engineering Bulletin, 2002

The VISPO project studies cooperative information systems in virtual districts to derive possible... more The VISPO project studies cooperative information systems in virtual districts to derive possible cooperation patterns and to provide an architectural framework for cooperation. Different organizations cooperate through e-Services, which are available through a Service Oriented Architecture.

This paper presents a first attempt to realize a methodological framework supporting the most rel... more This paper presents a first attempt to realize a methodological framework supporting the most relevant phases of the design of a value-added service. A value-added service is defined as a functionality of an adaptive and multi-channel information system obtained by composing services offered by different providers. The framework has been developed as part of the MAIS project. The MAIS framework focuses on the following phases of service life cycle: requirements analysis, design, deployment, run time use and negotiation. In the first phase, the designer elicits, validates and negotiates service requirements according to social and business goals. The design phase is in charge of modelling services with an enhanced version of UML, augmented with new features developed within the MAIS project. The deployment phase considers the network infrastructure and, in particular, provides an approach to implement and coordinate the execution of services from different providers. In the run time use and negotiation phase, the MAIS methodology provides support to the optimal selection and quality renegotiation of services and to the dynamic evaluation of management costs. The paper describes the MAIS methodological tools available for different phases of service life cycle and discusses the main guidelines driving the implementation of a service management architecture, called reflective architecture, that complies with the MAIS methodological approach.

Service oriented computing is becoming the standard paradigm to support the creation of applicati... more Service oriented computing is becoming the standard paradigm to support the creation of applications composed of services selected from a registry. Nowadays, we are assisting to the proliferation of standardized approaches to describe such services, but there is the general agreement of distinguishing between the general characteristics of services and the characteristics associated with service invocation. In many cases, the selection of services is static and based on matching techniques to retrieve the most appropriate ...

Alternate track papers & posters of the 13th international conference on World Wide Web - WWW Alt. '04, 2004

The ongoing diffusion of novel and mobile devices offers new ways to provide services across a gr... more The ongoing diffusion of novel and mobile devices offers new ways to provide services across a growing set of network technologies. As a consequence, traditional information systems evolve to multichannel systems in which services are provided through different channels, being a channel the abstraction of a device and a network. This work proposes a quality model suitable for capturing and reasoning about quality aspects of multichannel information systems.

… CAISE'03 Workshop (June 16-20), 2003

Proc. Information Systems for a Connected Society Ubiquitous Mobile Information and Collaboration... more Proc. Information Systems for a Connected Society Ubiquitous Mobile Information and Collaboration Systems CAISE'03 Workshop, Velden 16-20 June 2003 ... Andrea Maurino, Barbara Pernici, and Fabio A. Schreiber ... Politecnico di Milano, Dipartimento di Elettronica e ...

IEEE Transactions on Software Engineering, 2000

A method is proposed for quantitatively evaluating the availability of a distributed transaction ... more A method is proposed for quantitatively evaluating the availability of a distributed transaction system (DTS). The DTS dynamics can be modeled as a Markov process. The problem of formulating the set of linear homogeneous equations is considered, obtaining the related coefficient matrix, that is, the transition rate matrices of the DTS elements. Such operations can be performed according to the rules of Kronecker algebra. The transition rate matrices are used to calculate the probabilities of the different possible states of the DTS. The

International Journal of Interoperability …, 2008

ABSTRACT The advent of Web services, new network technologies, and new devices gives new opportun... more ABSTRACT The advent of Web services, new network technologies, and new devices gives new opportunities and imposes new requirements for the design and execution of adaptable processes. Processes can be composed using Web services, but their orchestration has to also consider users needs at runtime, where these needs are expressed as context information. Context information is formed by functional and non functional characteristics and Web services must be selected also considering non functional aspects. In this scenario, new approaches and new frameworks have to be studied in order to overcome the limitations of the current standards, such as WSDL and WS-BPEL, which only consider functional aspects of Web services. This paper presents the MAIS framework, which is able to execute a context aware orchestration of processes composed of Web services. With this framework, users can execute processes that adapt their behavior to users context.

ACM SIGMOD Record, 1994

Temporal databases has been an active area of research for the the last fteen years, with a corpu... more Temporal databases has been an active area of research for the the last fteen years, with a corpus nearing 800 papers. While most applications need to store time-varying data, there are no widely used commercial temporal databases. A primary reason for the absence of technology transfer from research to practice is the lack of a commonly accepted consensus data model or query language upon which to base research and development. Even the terminology is inconsistent.

Page 1. An Object-Oriented Approach to a Temporal Query Language 1 Nina Edelweiss , Jose Palazzo ... more Page 1. An Object-Oriented Approach to a Temporal Query Language 1 Nina Edelweiss , Jose Palazzo M. de Oliveira*, Barbara Pernici + * Universidade Federal do Rio Grande do Sul - Porto Alegre - RS - Brazil e-mail: [nina I palazzo] @inf.ufrgs.br ...

Lecture Notes in Computer Science, 2005

Volume Editors Robert Meersman Vrije Universiteit Brussel, STAR Lab Pleinlaan 2, Bldg G/10, 1050 ... more Volume Editors Robert Meersman Vrije Universiteit Brussel, STAR Lab Pleinlaan 2, Bldg G/10, 1050 Brussels, Belgium E-mail: meersman@ vub. ac. be Zahir Tari RMIT University, School of Computer Science and Information Technology City Campus, GPO Box 2476 V, ...

Advanced Information Systems …, 1993

Abstract. The representation of complex objects and behaviors (state transitions) ha information ... more Abstract. The representation of complex objects and behaviors (state transitions) ha information systems is a central issue in software engineering. 111 an hfformatiou system, supported by a conventional database, the only available state is the set of present values. The object's ...

ACM SIGMOD Record, 1994

This document contains definitions of a wide range of concepts specific to and widely used within... more This document contains definitions of a wide range of concepts specific to and widely used within tempoml databases. In addition to providing definitions, the document also includes sepamte explanations of many of the defined concepts.

World Wide Web, 2007

Current Web applications access information and services in a variety of ways. Several interactio... more Current Web applications access information and services in a variety of ways. Several interaction devices are available, access is becoming more and more mobile and ubiquitous, also due to a convergence of technologies traditionally belonging to separate areas, such as computer networks, traditional mass media, and advanced telephone services. Multiple interaction channels are projected to become prominent in the next few years. Users will access services and information in a variety of ways, from multiple ...

Proc. of the 1st Int. Conf. on …, 1994

A summary of research carried out in the CHOROCHRONOS Project, established as an EC-funded Traini... more A summary of research carried out in the CHOROCHRONOS Project, established as an EC-funded Training and Mobility Research Network with the objective of studying the design, implementation, and application of spatio-temporal database management systems. The nine coherent chapters by leading research groups are written in a tutorial style, making the research contributions of the project accessible to a wider audience interested in spatio-temporal information processing. Following an introductory overview, the book presents ...

IEEE Data Engineering Bulletin, 2002

The VISPO project studies cooperative information systems in virtual districts to derive possible... more The VISPO project studies cooperative information systems in virtual districts to derive possible cooperation patterns and to provide an architectural framework for cooperation. Different organizations cooperate through e-Services, which are available through a Service Oriented Architecture.

This paper presents a first attempt to realize a methodological framework supporting the most rel... more This paper presents a first attempt to realize a methodological framework supporting the most relevant phases of the design of a value-added service. A value-added service is defined as a functionality of an adaptive and multi-channel information system obtained by composing services offered by different providers. The framework has been developed as part of the MAIS project. The MAIS framework focuses on the following phases of service life cycle: requirements analysis, design, deployment, run time use and negotiation. In the first phase, the designer elicits, validates and negotiates service requirements according to social and business goals. The design phase is in charge of modelling services with an enhanced version of UML, augmented with new features developed within the MAIS project. The deployment phase considers the network infrastructure and, in particular, provides an approach to implement and coordinate the execution of services from different providers. In the run time use and negotiation phase, the MAIS methodology provides support to the optimal selection and quality renegotiation of services and to the dynamic evaluation of management costs. The paper describes the MAIS methodological tools available for different phases of service life cycle and discusses the main guidelines driving the implementation of a service management architecture, called reflective architecture, that complies with the MAIS methodological approach.

Service oriented computing is becoming the standard paradigm to support the creation of applicati... more Service oriented computing is becoming the standard paradigm to support the creation of applications composed of services selected from a registry. Nowadays, we are assisting to the proliferation of standardized approaches to describe such services, but there is the general agreement of distinguishing between the general characteristics of services and the characteristics associated with service invocation. In many cases, the selection of services is static and based on matching techniques to retrieve the most appropriate ...

Alternate track papers & posters of the 13th international conference on World Wide Web - WWW Alt. '04, 2004

The ongoing diffusion of novel and mobile devices offers new ways to provide services across a gr... more The ongoing diffusion of novel and mobile devices offers new ways to provide services across a growing set of network technologies. As a consequence, traditional information systems evolve to multichannel systems in which services are provided through different channels, being a channel the abstraction of a device and a network. This work proposes a quality model suitable for capturing and reasoning about quality aspects of multichannel information systems.

… CAISE'03 Workshop (June 16-20), 2003

Proc. Information Systems for a Connected Society Ubiquitous Mobile Information and Collaboration... more Proc. Information Systems for a Connected Society Ubiquitous Mobile Information and Collaboration Systems CAISE'03 Workshop, Velden 16-20 June 2003 ... Andrea Maurino, Barbara Pernici, and Fabio A. Schreiber ... Politecnico di Milano, Dipartimento di Elettronica e ...

IEEE Transactions on Software Engineering, 2000

A method is proposed for quantitatively evaluating the availability of a distributed transaction ... more A method is proposed for quantitatively evaluating the availability of a distributed transaction system (DTS). The DTS dynamics can be modeled as a Markov process. The problem of formulating the set of linear homogeneous equations is considered, obtaining the related coefficient matrix, that is, the transition rate matrices of the DTS elements. Such operations can be performed according to the rules of Kronecker algebra. The transition rate matrices are used to calculate the probabilities of the different possible states of the DTS. The

International Journal of Interoperability …, 2008

ABSTRACT The advent of Web services, new network technologies, and new devices gives new opportun... more ABSTRACT The advent of Web services, new network technologies, and new devices gives new opportunities and imposes new requirements for the design and execution of adaptable processes. Processes can be composed using Web services, but their orchestration has to also consider users needs at runtime, where these needs are expressed as context information. Context information is formed by functional and non functional characteristics and Web services must be selected also considering non functional aspects. In this scenario, new approaches and new frameworks have to be studied in order to overcome the limitations of the current standards, such as WSDL and WS-BPEL, which only consider functional aspects of Web services. This paper presents the MAIS framework, which is able to execute a context aware orchestration of processes composed of Web services. With this framework, users can execute processes that adapt their behavior to users context.

ACM SIGMOD Record, 1994

Temporal databases has been an active area of research for the the last fteen years, with a corpu... more Temporal databases has been an active area of research for the the last fteen years, with a corpus nearing 800 papers. While most applications need to store time-varying data, there are no widely used commercial temporal databases. A primary reason for the absence of technology transfer from research to practice is the lack of a commonly accepted consensus data model or query language upon which to base research and development. Even the terminology is inconsistent.

Page 1. An Object-Oriented Approach to a Temporal Query Language 1 Nina Edelweiss , Jose Palazzo ... more Page 1. An Object-Oriented Approach to a Temporal Query Language 1 Nina Edelweiss , Jose Palazzo M. de Oliveira*, Barbara Pernici + * Universidade Federal do Rio Grande do Sul - Porto Alegre - RS - Brazil e-mail: [nina I palazzo] @inf.ufrgs.br ...

Lecture Notes in Computer Science, 2005

Volume Editors Robert Meersman Vrije Universiteit Brussel, STAR Lab Pleinlaan 2, Bldg G/10, 1050 ... more Volume Editors Robert Meersman Vrije Universiteit Brussel, STAR Lab Pleinlaan 2, Bldg G/10, 1050 Brussels, Belgium E-mail: meersman@ vub. ac. be Zahir Tari RMIT University, School of Computer Science and Information Technology City Campus, GPO Box 2476 V, ...

Advanced Information Systems …, 1993

Abstract. The representation of complex objects and behaviors (state transitions) ha information ... more Abstract. The representation of complex objects and behaviors (state transitions) ha information systems is a central issue in software engineering. 111 an hfformatiou system, supported by a conventional database, the only available state is the set of present values. The object's ...

ACM SIGMOD Record, 1994

This document contains definitions of a wide range of concepts specific to and widely used within... more This document contains definitions of a wide range of concepts specific to and widely used within tempoml databases. In addition to providing definitions, the document also includes sepamte explanations of many of the defined concepts.

World Wide Web, 2007

Current Web applications access information and services in a variety of ways. Several interactio... more Current Web applications access information and services in a variety of ways. Several interaction devices are available, access is becoming more and more mobile and ubiquitous, also due to a convergence of technologies traditionally belonging to separate areas, such as computer networks, traditional mass media, and advanced telephone services. Multiple interaction channels are projected to become prominent in the next few years. Users will access services and information in a variety of ways, from multiple ...

Proc. of the 1st Int. Conf. on …, 1994

A summary of research carried out in the CHOROCHRONOS Project, established as an EC-funded Traini... more A summary of research carried out in the CHOROCHRONOS Project, established as an EC-funded Training and Mobility Research Network with the objective of studying the design, implementation, and application of spatio-temporal database management systems. The nine coherent chapters by leading research groups are written in a tutorial style, making the research contributions of the project accessible to a wider audience interested in spatio-temporal information processing. Following an introductory overview, the book presents ...