Context-adaptive multichannel applications: a model and a case study

Matteo Barbero ID. 724740

Barbara Bragatto ID. 724741

POLITECNICO DI MILANO

Master of Science in Computer Engineering

POLO REGIONALE DI COMO

A.Y. 2009/10

October 22nd , 2010

A model and case study

Supervisor: Prof. Paolo Paolini

Assistant supervisor: Prof. Nicoletta Di Blas

Table of contents

1. Introduction

2. Adaptivity & efficiency

3. The idea and our work– Requirements analysis

– 1001guides model

– Application prototypes (DEMO)

4. Generalization: A-1001stories model

5. Conclusions and future works

Context-adaptive multichannel applications: a model and a case-study – Barbero, Bragatto 2

Current situation:

• Increasing range of comm. devices

• Ubiquitous access to information


1. Introduction2. Adaptivity3. Idea & work4. Generalization5. Conclusions

Introduction

New situationsof use

How we can provide a satisfactory experience in all these different situations?

Definition

Ability of a system to adapt its behaviorand characteristics to the situation of use

Classical adaptivity techniques. Depends on:

• User profile

• Context

• Device


Adaptivity



Effectiveness Vs Efficiency

Classical adaptivity techniques Effective final result

• What about efficiency? Multimedia contents are costly!

Typical solutions:• Recycle !• Development from scratch

EFFECTIVENESS EFFICIENCY

DevelopmentFrom scratch

Classical adaptivitytechniques

RecyclingOur approach

Typical scenario:• Limited amount of time• Limited financial resources



1001stories

• A web-based tool for the production of multimedia narratives

• Authoring easiness and efficiency

• Fixed format, suggested workflow

• Delivery channels: Web, CD-ROM, iPod

But: not a truly adaptive tool

Our case-study: different application, interactive guides for CH

1001storiesengine

Authoringenvironment


• Adaptation based on context and channels, combined in a unique dimension: User eXperience

• Focus on multimedia content adaptation

• Good efficiency-efficacy tradeoff

Core contentsCommon content basis that feeds all the final versions

Complementing contentsComplementing contents and other efficient methods to tailor information to UXs

UX 2

UX 1

UX n


The idea


• The case study: an adaptive guide forthe Archaeological museum of Milan

• Core contents from existing 1001stories narration

• Support of different devices and contexts

Results:

1. 1001Guides model

• Supports “efficient” adaptivity

• Basis for a new adaptive authoring tool

2. Application prototypes

• Efficacy test for the approach


Our work

1001guidesmodel

Applications

Authoringtool

Basis for

Builds



Step 1 –Requirement analysis

Definition of supported User eXperiences

UX requirements:

• Device clusters

• Context clusters

• UX matrix

Detailed requirements:

• Content

• Information architecture


A conceptual model for the common content

basis, their organization and the adaptation methods


Step 2 – 1001guides model

1. CORECONTENTS

2. ACCESSSTRATEGIES

3. CONTENTADAPTATION MECHANISMS

UX 2

UX 1

UX n


UX 3

The core contents model semantically describes the structure of the common content basis on which the whole adaptation system is built


1001guides – Core contents


• Dialogue act 1• Dialogue act 2• Dialogue act 3

• Dialogue act 1• Dialogue act 2• Dialogue act 3

Themes Objects

• Dialogue act 1

References

• Dialogue act 1• Dialogue act 2

Info pages

n:m

n:m

n:m

n:m

n:m

n:m

Cultural contents


1001guides – Access strategies

Access strategies describes how core contents can be accessed and how they are organized for the user fruition

High-levelAS

AS 1

AS 2

-AS n

Low-level AS UX 1

UX 2

UX n

UX 3



1001guides – Access strategies (2)

High-level AS

Low-level ASs


Index

Themes Objects

The process in which core contents are tailored to the reqs of UXs and Access strategies, by enriching them with complementing contents

Deictic images

OFFSITE ONSITE

Index-access adaptation

Examples:

Depends on { UX , Access strategy }


1001guides – Content adaptation


Item

Index

Absolute CulturalIntroduction

Absolute PhysicalIntroduction


Step 3 – Adapted prototypes

Practical result: Adapted applications for the archaeological museum



Demo

• Motivations:• Contents from a different format: 1001stories

• Work on other formats(Enhanced narration, Leisure browsing)

• Essential contents always the same


Generalization (1)

Adaptation based on:{UX, Access strategy}

Adaptation based on:{Format, UX, Access strategy}

• The ideaContent re-use and adaptation among completely different application formats


A-1001stories model


Generalization (2)

Informationarchitectureadaptation

Contentadaptation


CORECONTENTS

UX 1

Random

Interactiveguide

Index Guided-tour

Narration

Storytelling

Leisurebrowsing

Image-driven

UX 2 UX n UX 1 UX 2 UX n UX 1 UX 2 UX n

• 1001guides model• Designed for interactive guides

• Adaptation on User eXperience (context, channel)

• Core contents + Complementing contents

• Efficiency - Effectiveness tradeoff

• A-1001stories for multi-format adaptation

Future works:

• Validation of the generalized A-1001stories model

• Adaptive authoring tool based on A-1001stories model

• Inter-domain adaptation (mash-up applications)


Conclusions and future works


Thank youfor the attention

Matteo BarberoBarbara Bragatto

Technology

Context-adaptive multichannel applications: a model and a case study