267 research outputs found
MiKO---Mikado Koncurrent Objects
The motivation for the Mikado migration model is to provide
programming constructs for controlling code mobility that are as
independent as possible from the particular programming language used
to program the code. The main idea is to regard a domain (or
site, or locality), where mobile code may enter or exit, as a
membrane enclosing running processes, and offering services
that have to be called for entering or exiting the domain.
MiKO---Mikado Koncurrent Objects is a particular instance of this
model, where the membrane is explicitly split in two parts: the
methods defining the interface, and a process part describing the data
for, and the behavior of, the interface.
The talk presents the syntax, operational semantics, and type system
of MiKO, together with an example. It concludes by briefly mentioning
the implementation of a language based on the calculus
Modelling and analyzing adaptive self-assembling strategies with Maude
Building adaptive systems with predictable emergent behavior is a challenging task and it is becoming a critical need. The research community has accepted the challenge by introducing approaches of various nature: from software architectures, to programming paradigms, to analysis techniques. We recently proposed a conceptual framework for adaptation centered around the role of control data. In this paper we show that it can be naturally realized in a reflective logical language like Maude by using the Reflective Russian Dolls model. Moreover, we exploit this model to specify, validate and analyse a prominent example of adaptive system: robot swarms equipped with self-assembly strategies. The analysis exploits the statistical model checker PVeStA
A Conceptual Framework for Adapation
This paper presents a white-box conceptual framework for adaptation that promotes a neat separation of the adaptation logic from the application logic through a clear identification of control data and their role in the adaptation logic. The framework provides an original perspective from which we survey archetypal approaches to (self-)adaptation ranging from programming languages and paradigms, to computational models, to engineering solutions
A Conceptual Framework for Adapation
This paper presents a white-box conceptual framework for adaptation that promotes a neat separation of the adaptation logic from the application logic through a clear identification of control data and their role in the adaptation logic. The framework provides an original perspective from which we survey archetypal approaches to (self-)adaptation ranging from programming languages and paradigms, to computational models, to engineering solutions
A Conceptual Framework for Adapation
We present a white-box conceptual framework for adaptation. We called it CODA, for COntrol Data Adaptation, since it is based on the notion of control data. CODA promotes a neat separation between application and adaptation logic through a clear identification of the set of data that is relevant for the latter. The framework provides an original perspective from which we survey a representative set of approaches to adaptation ranging from programming languages and paradigms, to computational models and architectural solutions
08061 Abstracts Collection -- Types, Logics and Semantics for State
From 3 February to 8 February 2008, the Dagstuhl Seminar 08061
``Types, Logics and Semantics for State\u27\u27 was held in the
International Conference and Research Center (IBFI), Schloss Dagstuhl.
During the seminar, several participants presented their current
research, and ongoing work and open problems were discussed. Abstracts
of the presentations given during the seminar as well as abstracts of
seminar results and ideas are put together in this paper. The first
section describes the seminar topics and goals in general. Links to
extended abstracts or full papers are provided, if available
Semantic interoperability in ad-hoc computing environments
This thesis introduces a novel approach in which multiple heterogeneous devices collaborate to provide useful applications in an ad-hoc network. This thesis proposes a smart home as a particular ubiquitous computing scenario considering all the requirements given by the literature for succeed in this kind of systems. To that end, we envision a horizontally integrated smart home built up from independent components that provide services. These components are described with enough syntactic, semantic and pragmatic knowledge to accomplish spontaneous collaboration. The objective of these collaboration is domestic use, that is, the provision of valuable services for home residents capable of supporting users in their daily activities. Moreover, for the system to be attractive for potential customers, it should offer high levels of trust and reliability, all of them not at an excessive price. To achieve this goal, this thesis proposes to study the synergies available when an ontological description of home device functionality is paired with a formal method. We propose an ad-hoc home network in which components are home devices modelled as processes represented as semantic services by means of the Web Service Ontology (OWL-S). In addition, such services are specified, verified and implemented by means of the Communicating Sequential Processes (CSP), a process algebra for describing concurrent systems. The utilisation of an ontology brings the desired levels of knowledge for a system to compose services in a ad-hoc environment. Services are composed by a goal based system in order to satisfy user needs. Such system is capable of understaning, both service representations and user context information. Furthermore, the inclusion of a formal method contributes with additional semantics to check that such compositions will be correctly implemented and executed, achieving the levels of reliability and costs reduction (costs derived form the design, development and implementation of the system) needed for a smart home to succeed.EThOS - Electronic Theses Online ServiceGBUnited Kingdo
Process-aware web programming with Jolie
We extend the Jolie programming language to capture the native modelling of
process-aware web information systems, i.e., web information systems based upon
the execution of business processes. Our main contribution is to offer a
unifying approach for the programming of distributed architectures on the web,
which can capture web servers, stateful process execution, and the composition
of services via mediation. We discuss applications of this approach through a
series of examples that cover, e.g., static content serving, multiparty
sessions, and the evolution of web systems. Finally, we present a performance
evaluation that includes a comparison of Jolie-based web systems to other
frameworks and a measurement of its scalability.Comment: IMADA-preprint-c
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