scholarly journals On the Formal Semantics of Speech-Act Based Communication in an Agent-Oriented Programming Language

2007 ◽  
Vol 29 ◽  
pp. 221-267 ◽  
Author(s):  
R. Vieira ◽  
A. F. Moreira ◽  
M. Wooldridge ◽  
R. H. Bordini

Research on agent communication languages has typically taken the speech acts paradigm as its starting point. Despite their manifest attractions, speech-act models of communication have several serious disadvantages as a foundation for communication in artificial agent systems. In particular, it has proved to be extremely difficult to give a satisfactory semantics to speech-act based agent communication languages. In part, the problem is that speech-act semantics typically make reference to the "mental states" of agents (their beliefs, desires, and intentions), and there is in general no way to attribute such attitudes to arbitrary computational agents. In addition, agent programming languages have only had their semantics formalised for abstract, stand-alone versions, neglecting aspects such as communication primitives. With respect to communication, implemented agent programming languages have tended to be rather ad hoc. This paper addresses both of these problems, by giving semantics to speech-act based messages received by an AgentSpeak agent. AgentSpeak is a logic-based agent programming language which incorporates the main features of the PRS model of reactive planning systems. The paper builds upon a structural operational semantics to AgentSpeak that we developed in previous work. The main contributions of this paper are as follows: an extension of our earlier work on the theoretical foundations of AgentSpeak interpreters; a computationally grounded semantics for (the core) performatives used in speech-act based agent communication languages; and a well-defined extension of AgentSpeak that supports agent communication.

Author(s):  
Lavindra de Silva ◽  
Felipe Meneguzzi ◽  
Brian Logan

The BDI model forms the basis of much of the research on symbolic models of agency and agent-oriented software engineering. While many variants of the basic BDI model have been proposed in the literature, there has been no systematic review of research on BDI agent architectures in over 10 years. In this paper, we survey the main approaches to each component of the BDI architecture, how these have been realised in agent programming languages, and discuss the trade-offs inherent in each approach.


2013 ◽  
Vol 30 (1) ◽  
pp. 1-44 ◽  
Author(s):  
Felipe Meneguzzi ◽  
Lavindra De Silva

AbstractAgent programming languages have often avoided the use of automated (first principles or hierarchical) planners in favour of predefined plan/recipe libraries for computational efficiency reasons. This allows for very efficient agent reasoning cycles, but limits the autonomy and flexibility of the resulting agents, oftentimes with deleterious effects on the agent's performance. Planning agents can, for instance, synthesise a new plan to achieve a goal for which no predefined recipe worked, or plan to make viable the precondition of a recipe belonging to a goal being pursued. Recent work on integrating automated planning with belief-desire-intention (BDI)-style agent architectures has yielded a number of systems and programming languages that exploit the efficiency of standard BDI reasoning, as well as the flexibility of generating new recipes at runtime. In this paper, we survey these efforts and point out directions for future work.


Author(s):  
Tatiana Piccardi

ABSTRACTThrough the analysis of narratives on sorrow and pain, this paper attempts to verify the extent to which speakers seem to find relief and internal resources to rebuild their lives within their own processes of narration. The proposed reflections derive from two correlated experiences: (i) observing speeches of parents belonging to a group that supports grieving parents. These speeches led to a favorable mourning development; and (ii) the fact that the researcher had the opportunity to act as a ghostwriter of an unusual story: the one involving a transsexual who decided to undergo sex reassignment surgery and write about the experience to transform her pain into narrative. In both cases, the narratives seem to have been critical to transform their lives. In both cases, the empathy of the interlocutor(s) was fundamental to promote what I freely call “curative effects”. The starting point is the perception that each speech act can be understood in its wealth only within the broader context of its production. This includes checking – for the case of the fragments presented – the appearance of discourses about illness, death, loss, sexuality, which permeate our culture and get materialized into the speeches of the interlocutors. It is understood that curative effects as well as identity empowerment cannot be explained solely through the narrativization of personal stories about sorrow and pain, but it is equally understood that one needs a widely-held comprehension about the language movement that is enabled in those specific situations as to evaluate how language can be optimized in similar processes where transforming pain into narrative can be a matter of survival. My conclusion makes a few considerations on how these narratives can be deemed speech acts with curative effects that can promote life and reconstruct identities and how they act independently within the enunciative process. Austin’s (1975) speech act theory is the main theoretical prospect adopted, in a combination with recent debates about identity and reflections over the relations involving language, literature, narrative, and health promoted by GENAM, the Narrative and Medical Science Study Group of the University of São Paulo, Brazil.RESUMOEste trabalho busca verificar, por meio da análise de narrativas sobre dor e sofrimento, em que medida os respectivos enunciadores parecem encontrar alívio e recursos internos para refazer suas vidas por meio do próprio processo de narrar. As reflexões propostas são desdobramento de duas experiências correlatas: (i) a observação das falas das mães/pais pertencentes a um grupo de apoio a pais enlutados; falas tais que promoveram um desenvolvimento favorável do luto; e (ii) o fato de esta pesquisadora ter tido a oportunidade de ser a ghostwriter de uma história incomum: a de um transexual que decidiu realizar a cirurgia para mudança de sexo e resolveu escrever sobre sua experiência de modo a transformar sua dor em narrativa. Nos dois casos as narrativas parecem ter sido decisivas para transformar vidas. Nos dois casos, a empatia do(s) interlocutor(es) foi fundamental para que se promovessem o que chamo livremente de efeitos curativos. Parte-se da compreensão de que cada ato de fala pode ser entendido em sua riqueza apenas se inserido no contexto mais amplo de sua produção, o que compreende verificar, no caso dos fragmentos apresentados, a emergência de discursos sobre doença, morte, perda, sexualidade, que atravessam nossa cultura e se materializam nas falas dos interlocutores. Entende-se que os efeitos curativos e o empoderamento identitário não podem ser explicados unicamente através da narrativização das histórias pessoais de dor e sofrimento, mas igualmente entende-se que é preciso compreender melhor o movimento de linguagem que é acionado nessas situações específicas, para que se avalie como se pode otimizar a linguagem em processos semelhantes, em que transformar uma dor em narrativa pode ser condição de sobrevivência. Concluo com algumas considerações a respeito do quanto tais narrativas podem ser consideradas atos de fala com efeitos curativos capazes de promover vida e reconstruir identidades e o quanto atuam independentemente no processo de enunciação. A principal perspectiva teórica adotada é a teoria dos atos de fala de Austin (1975), combinada com debates recentes sobre identidade, e reflexões sobre as relações entre linguagem, literatura, narrativa e saúde promovidas pelo GENAM.


2015 ◽  
Vol 30 (4) ◽  
pp. 394-418 ◽  
Author(s):  
Mehdi Dastani

AbstractWith the significant advances in the area of autonomous agents and multi-agent systems in the last decade, promising technologies for the development and engineering of multi-agent systems have emerged. The result is a variety of agent-oriented programming languages, development frameworks, execution platforms, and tools that facilitate building and engineering of multi-agent systems. This paper provides an overview of the multi-agent programming research field and explains the aim and characteristics of various multi-agent programming languages and development frameworks. This overview is complemented with a discussion on the current trends and challenges in this research community.


2011 ◽  
Vol 19 (1) ◽  
pp. 5-63 ◽  
Author(s):  
Louise A. Dennis ◽  
Michael Fisher ◽  
Matthew P. Webster ◽  
Rafael H. Bordini

2019 ◽  
Vol 24 (1) ◽  
pp. 95-112
Author(s):  
Rong Guo

Since the publication of How to Do Things with Words in 1962, Austin and his speech-act theory caused a great disturbance in the arena of linguistics and literature, not only initiating the study of pragmatics but also triggering the paradigm change of literary studies in the 20th century. Stanley Fish, Wolfgang Iser, Derrida, de Man, J. Hillis Miller, and many other scholars in the 1970s showed great enthusiasm for theory. Yet, the theory’s limitations and applications are widely known. The publication of Speech Acts in Literature and Literature as Conduct by J. Hillis Miller seems to have given a kind of momentum to its development. Taking Miller’s initiatives as a starting point, this article analyzes a specific literary text, The Ninth Widow by a Chinese overseas writer Yan Geling, with an intention to illustrate that the application of the speech-act theory in the literary studies is indeed promising and productive.


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