WWW.BOOK.DISLIB.INFO
FREE ELECTRONIC LIBRARY - Books, dissertations, abstract
 
<< HOME
CONTACTS



Pages:   || 2 | 3 | 4 |

«Abstract. Using Punch and Judy as a story domain, we describe an interactive puppet show, where the flow and content of the story can be influenced ...»

-- [ Page 1 ] --

An interactive, generative Punch and Judy show

using institutions, ASP and emotional agents

Matt Thompson1,2, Julian Padget1, and Steve Battle2

Department of Computer Science,

University of Bath, UK

{m.r.thompson,j.a.padget}@bath.ac.uk

Sysemia Ltd.

Bristol & Bath Science Park, Bristol BS16 7FR

steve.battle@sysemia.co.uk

Abstract. Using Punch and Judy as a story domain, we describe an interactive

puppet show, where the flow and content of the story can be influenced by the

actions of the audience. As the puppet show is acted out, the audience reacts to events by cheering or booing the characters. This affects the agents’ emotional state, potentially causing them to change their actions, altering the course of the narrative. An institutional normative model is used to constrain the narrative so that it remains consistent with the Punch and Judy canon. Through this vignette of a socio-technical system (STS), comprising human and software actors, an institutional model – derived from narrative theory – and (simplistic) technological interaction artifacts, we begin to be able to explore some of the issues that can arise in STS through the prism of the World-Institution-Technology (WIT) model.

1 Introduction Agent-based approaches for interactive narrative generation use intelligent agents to model the characters in a story. The agents respond to the interactions of a player with dialogue or actions fitting the shape of a story. However, these agents have little autonomy in their actions, bound as they are to the strict requirements of their role in the narrative.

Other approaches to balancing authorial control with player or character agency include the use of director agents [11], reincorporation of player actions back into the narrative [19] and mediation to prevent narrative-breaking actions [16].

An institutional model can be used as a normative framework for governing the actions of agents in a story. By describing the rules of a narrative in terms of social expectations, the agents are encouraged to perform certain types of actions while still remaining free to break free of these expectations. As in society in the real world, breaking agreed norms comes with consequences, and only generally happens in exceptional circumstances. One situation where this may reasonably occur is when agents experience emotions. An agent experiencing an extreme emotion – in respect of some emotional model – such as rage or depression, may be allowed to act unusually or uncharacteristically. Allowing characters to break with the norms of the narrative enables them to An earlier version of this work was presented at the AI & Games symposium, held as part of AISB 2015, Canterbury, UK.

be ‘pushed too far’ by circumstances, with results that can add an extra dimension of richness to the telling.

There are two novel aspects to the approach we describe here: (i) the use of an institutional model to describe a narrative ‘world’ or domain, and (ii) how emotional models can give intelligent agents an alternative form of autonomy – from being limited by knowledge, reasoning capacity and time (aka bounded-rationality) and self-interest – both to act in idiosyncratic ways and to react emotionally to input from the audience.

Here we present an implementation in the form of an interactive Punch and Judy puppet show, in which the course of the story changes in accordance with the responses that come from the audience.

The structure of the system takes cues from the WIT model [13] which offers a pattern for analysing socio-technical systems through the interaction of three views of a system: (i) the world view (W), as human and software agents see it: in this case, the audience (human) and the actors (BDI agents) playing roles in Punch and Judy, (ii) the institutional view (I) that sets out the regulation of the system: in this case the narrative structure corresponding to Punch and Judy, captured in terms of Propp’s [14] story moves and roles, and (iii) the technological view (T) that identifies the components (software and hardware) that enable the realization of the system, in this case, the means to capture audience input and the visualization of the performance. More importantly, WIT emphasises the role of the institution both as regulator and monitor of behaviour, which is exactly what we see in our system, since through permission and obligation it directs the actors towards the conclusion of the narrative, while also observing their actions for adherence to the narrative structure.

The puppets in the show are each realised by belief-desire-intention (BDI) agents augmented with a valence, arousal, dominance (VAD) emotional model, which we describe in section 4. The story is modelled by a set of institutional norms (section 6.1) that describe the Punch and Judy story domain in terms of Propp’s ‘story moves’ [14] (section 2). The agents communicate with their environment using the Bath Sensor Framework [10], described in section 6.3. In the final sections, we describe the animation system that functions both as the agents’ environment (section 6.3), and the means for the audience to interact with the system (section 7). The focus here is on the more technical aspects of the system and how the various components fit together, while more detail on the narrative side appears in [18].





2 Propp’s story moves and roles

To express story events as an institution, we need some sort of formalisation for the analysis of the story – rather than an arbitrary selection of features – and so we look to narrative theory for inspiration. Instead of describing parts of the Punch and Judy story explicitly (such as ‘Punch is expected to hit the policeman in this scene’), it is desirable to describe scenes in a more

Abstract

way using roles (‘The villain fights the victim in this scene’). The use of more general story fragments allows us to reuse them in multiple scenes, or even in other stories.

Narratology, and structuralism in particular, supply such generalised building blocks for stories. Russian formalism is an early movement in narrative theory that sought to formalise the elements of narrative, and Vladimir Propp was a prominent figure in this school. One outcome of this movement was Propp’s 1928 formalism derived from the study of Russian folktales, The Morphology of the Folktale [14], which is what we use to build a model to direct the course of the narrative. In this formalism, Propp identifies recurring characters, which become roles, and motifs, which become action fragments, in Russian folklore, distilling them down to a concise syntax with which to describe stories. Propp’s functional, event-driven style translates comfortably to an institution comprised of event-based norms. However, while these action fragments fit the Punch and Judy story adequately, we note that the role labels can sound rather awkward because of the apparent semantic import of the textual label.

In Propp’s formalism, characters have roles, such as hero, villain, dispatcher, false hero, and more. Characters performing a certain role are able to perform a subset of story moves, which are actions that make the narrative progress. For example, the dispatcher might send the hero on a quest, or the victim may issue an interdiction to the villain, which is then violated.

Propp defines a total of 31 distinct story functions. Each function is given a number and symbol in order to create a succinct way of describing entire stories. Examples of

such functions are:

– One of the members of a family absents himself from home: absentation.

– An interdiction is addressed to the hero: interdiction.

– The victim submits to deception and thereby unwittingly helps his enemy: complicity.

– The villain causes harm or injury to a member of the family: villainy.

Each of these functions can vary in subtle ways. For example, the villainy function can be realised as one of 19 distinct forms of villainous deed, including the villain abducts a person, the villain seizes the daylight, and the villain makes a threat of cannibalism.

These functions are enacted by characters following certain roles. Each role (or dramatis persona in Propp’s definition) has a sphere of action consisting of the functions that they are able to perform at any point in the story. Propp defines seven roles each of which has distinct spheres of action: villain, donor, helper, princess, dispatcher, hero, and false hero. In a typical story, one story function will follow another as the tale progresses in a sequential series of cause and effect. However, Propp’s formalism does also allow for simultaneous story functions.

2.1 Propp example: sausages and crocodile scene To provide some context for Punch and Judy, since it is a peculiarly British phenomenon,

although with Italian origins, we quote from Wikipedia:

Punch and Judy is a traditional, popular, and usually very violent puppet show featuring Mr Punch and his wife, Judy. The performance consists of a sequence of short scenes, each depicting an interaction between two characters, most typically Mr Punch and one other character (who usually falls victim to Mr. Punch’s club). It is often associated with traditional British seaside culture. The Punch and Judy show has roots in the 16th-century Italian commedia dell’arte.

http://en.wikipedia.org/wiki/Punch_and_Judy, retrieved 2015-05-06.

The common elements of Punch and Judy are easily described in terms of Propp’s story functions. Here we pick one scene to use as an example: the scene where Punch battles a crocodile in order to safeguard some sausages. In this scene, Joey the clown (our narrator) asks Punch to guard the sausages. Once Joey has left the stage, a crocodile appears and eats the sausages. Punch fights with the crocodile, but it escapes. Joey then

returns to find that his sausages are gone. The corresponding story functions are:

1. Joey tells Punch to look after the sausages (interdiction).

2. Joey has some reservations, but decides to trust Punch (complicity).

3. Joey gives the sausages to Punch (provision or receipt of a magical agent).

4. Joey leaves the stage (absentation).

5. A crocodile enters the stage and eats the sausages (violation).

6. Punch fights with the crocodile (struggle).

7. Joey returns to find that the sausages are gone (return).

Some story functions map to Punch and Judy better than others (for example, it is debatable as to whether or not the sausages can be considered a “magical agent”), but Propp’s formalism seems well suited to Punch and Judy for the most part. The advantage of using Propp for the Punch and Judy story domain is that the story function concept maps well to the idea of internal events in institutional models.

3 Institutional model An institution describes a set of ‘social’ norms describing the permitted and obliged behaviour of interacting agents. Noriega’s ‘Fish Market’ thesis [3] describes how an institutional model can be used to regiment the actions of agents in a fish market auction.

Several [2, 7, 5] extend this idea to build systems where institutions actively regulate the actions of agents, while still allowing them to decide what to do. We build on the work of Cliffe et al. [6] and Lee et al. [10] to adapt it for the world of narrative, using an institutional model to describe the story world of Punch and Judy in terms of Propp’s story moves and character roles.

Institutional models use concepts from deontic logic to provide obligations and permissions that act on interacting agents in an environment. By combining this approach with Propp’s concepts of roles and story moves, we describe a Propp-style formalism of Punch and Judy in terms of what agents are obliged and permitted to do at certain points in the story.

For example, in one Punch and Judy scene a policeman enters the stage and attempts to apprehend Punch. According to the rules of the Punch and Judy world, Punch has an obligation to kill the policeman by the end of the scene (as this is what the audience expects to happen, having seen other Punch and Judy shows). The policeman has an obligation to try his best to catch Punch. Both agents have permission to be on the stage during the scene. The policeman only has permission to chase Punch if he can see him (Punch is obliged to hide from him at the start of the scene).



Pages:   || 2 | 3 | 4 |


Similar works:

«STANDARD des TAIGAN National durch den VDH anerkannte Rasse FCI-Gruppe 10 (Rasse nicht FCI-anerkannt) Standard-Nr. 994 Taigan Rüde Taigan Hündin Diese Illustrationen stellen nicht unbedingt das Idealbild der Rasse dar. © Verband für das Deutsche Hundewesen e.V., Westfalendamm 174, 44141 Dortmund Datum der Publikation des gültigen offiziellen Standards: 29.10.2014 VERWENDUNG: Der Taigan hat die hervorragenden Qualitäten eines Jagdhundes: Gewandtheit, Jagdtrieb, scharfer Blick, ausdauernde...»

«Investigating Data Mining in MATLAB® Submitted in partial fulfilment of the requirements of the degree Bachelor of Science (Honours) of Rhodes University Douglas Trewartha Supervised by: John Ebden November 2006 Abstract Data mining is a rapidly expanding field in many disciplines. It is becoming increasingly necessary to find data mining packages appropriate for a given analysis. The reasons as to why MATLAB (version 7.0) is the correct kind of package to use and its particular advantages...»

«HUMBOLDT-UNIVERSITÄT ZU BERLIN INSTITUT FÜR BIBLIOTHEKSUND INFORMATIONSWISSENSCHAFT BERLINER HANDREICHUNGEN ZUR BIBLIOTHEKSUND INFORMATIONSWISSENSCHAFT HEFT 365 DIE IN DER ZWISCHENKRIEGSZEIT (1919 -1939) IN DEUTSCHLAND HERAUSGEGEBENE RUSSISCHSPRACHIGE PRESSE UND DIE PERSPEKTIVEN IHRER DIGITALISIERUNG VON EVGENIYA ROOT DIE IN DER ZWISCHENKRIEGSZEIT (1919 -1939) IN DEUTSCHLAND HERAUSGEGEBENE RUSSISCHSPRACHIGE PRESSE UND DIE PERSPEKTIVEN IHRER DIGITALISIERUNG VON EVGENIYA ROOT Berliner...»

«CRPD/C/EU/CO/1 United Nations Convention on the Rights Distr.: General 4 September 2015 of Persons with Disabilities ADVANCE UNEDITED VERSION Original: English Committee on the Rights of Persons with Disabilities Concluding observations on the initial report of the European Union * I. Introduction 1. The Committee considered the initial report of the European Union (EU) (CRPD/C/ EU /1) at its 220th and 221st meetings, held on August 27th and August 28th respectively, and adopted the following...»

«Inhalt — S. 1 क Der Schock des Bösen als Inspiration des Ramayaṇa —— S. 2 ख Die Unschärfe des Übels in der Welt —— S. 3 ग Der Anfang aller Dichtkunst: das Ramayaṇa als erstes Dichtwerk —— S. 4 घ Auf der Suche nach dem wahrhaft guten Menschen —— S. 5 ङ Rama als Schurke und Bösewicht —— S. 6 च Das Ramayaṇa als epische Dichtung —— S. 7 छ Das böse und das gute Fremde in tödlichem Konflikt —— S. 9 ज Das Ramayaṇa als interkulturelles...»

«Principal Trading, Price Improvement and Liquidity Provision in a Non-Anonymous Market D. Alasdair S. Turnbull Clarkson University We model principal trading by upstairs market makers and find that it supplies significant liquidity and price improvement to the market. First, clients more frequently submit orders to firms that do upstairs principal trading. Second, these firms provide liquidity to clients that is unavailable in the consolidated limit order book. Principal trades are, on average,...»

«Institut für Computational Science Prof. Dr. H. Hinterberger Praxismodul 3 Visualisierung als Werkzeug zur Analyse mehrdimensionaler Daten Praxis 3 Visualisierung © Institut für Computational Science, ETH Zürich, 1996-2005 Alle Rechte vorbehalten. Internetadresse: www.evim.ethz.ch Praxis 3 Visualisierung Wie bearbeite ich dieses Modul? Dieses Praxismodul bearbeiten Sie am effizientesten, wenn Sie die folgenden drei Teile in angegebener Reihenfolge angehen: Teil A: Einführung In diesem...»

«Discussion Paper No. 07-015 Age-dependent Skill Formation and Returns to Education Friedhelm Pfeiffer and Karsten Reuß Discussion Paper No. 07-015 Age-dependent Skill Formation and Returns to Education Friedhelm Pfeiffer and Karsten Reuß Download this ZEW Discussion Paper from our ftp server: ftp://ftp.zew.de/pub/zew-docs/dp/dp07015.pdf Die Discussion Papers dienen einer möglichst schnellen Verbreitung von neueren Forschungsarbeiten des ZEW. Die Beiträge liegen in alleiniger Verantwortung...»

«Dissertation zur Erlangung des Doktorgrades der Fakultät für Chemie und Pharmazie der Ludwig-Maximilians-Universität München Aggregation of Therapeutic Antibodies in the Course of Downstream Processing vorgelegt von Eva Rosenberg aus Stuttgart Februar 2010 Erklärung Diese Dissertation wurde im Sinne von § 13 Abs. 3 bzw. 4 der Promotionsordnung vom 29. Januar 1998 von Herrn Prof. Dr. Gerhard Winter betreut. Ehrenwörtliche Versicherung Diese Dissertation wurde selbständig, ohne unerlaubte...»

«. ETHIOPIC I (GECEZ) 12A.0 BIBLIOGRAPHY [cf. 0.1. Common Semitics; 9.0 South-Semitic] An annotated bibliography of the Semitic languages of Ethiopia, by W. Leslau [Bibliographies on the Near East 1), The Hague 1965 [rev.: BSOAS 30, 1967, 453-454 (A.K. Irvine); BSL 62, 1967, 134-135 (D. Cohen); RSEt 22, 1966, 151-153 (L. Ricci); AO 37, 1969, 284 (K. Petrá.ek); Linguistics 52, 1969, 99-100 (R. Hetzron); OLZ 63, 1968, 258-263 (W.W. Müller); AmA 70, 1968, 430 (D. Cohen)]. Äthiopistik an...»





 
<<  HOME   |    CONTACTS
2016 www.book.dislib.info - Free e-library - Books, dissertations, abstract

Materials of this site are available for review, all rights belong to their respective owners.
If you do not agree with the fact that your material is placed on this site, please, email us, we will within 1-2 business days delete him.