Interface Usability

Interfaces for static systems

This paper considers the ergonomics of user-interfaces (UIs) for “static systems”, such as storage facilities. In order to separately address the physical structure and the contents each part of the physical structure hosts, the units resulting from a functional analysis of the structure are termed “slots” and the contents assigned to them, “fillers”.

Design factors significant for this type of UIs are the data model (describing the items to be stored), and the way it is mapped onto the hardware. Inferences about the location of fillers (searching aids) appear to be dependent on the structure of the hardware and the strategy used to map categories of the data model onto it.

Regularity in the slot layout is viewed as a condition for users to make right guesses about filler locations by evaluating the relative distance between slots. To make such guesses effective, a faceted data description (categorisation) and a consistent assignment of categories to the hardware dimensions seem convenient.

Data models are viewed as a combined result of categorisation and classification (ordering the features used to model the data into a hierarchy). Cognitive aspects of visual perception, mainly drawn from the Gestalt theory, are invoked while discussing mappings of the data model onto the hardware.

Relating an ontology-based design of data to the structure of interfaces explicitly, and invoking visual cognition as a working aid are the main points of this contribution.

A typology of widgets for UI design

Widget selection when designing user interfaces is a rather intuitive task. No clearly established methodology containing in-depth descriptions of widgets or explicit rules to choose them has been included in the major development processes. Widget catalogs are only partially specified and do not overtly consider the domain-field knowledge representation as bound to current tasks. Moreover, these representations have not undergone any systematic approach from the point of view of their structure.

The first aim of this paper is to formally describe the major types of content that widgets can host from this perspective. We call these types ” Information Structures ” and divide them into 5 categories (” atom ” , ” collection ” , ” hierarchy ” , ” taxonomy ” and ” network “). We then specify a series of features allowing to classify widgets alongside with their informational content structure and set a framework for widget description.

Navigation et segmentation de contenus en ligne

Ce rapport de recherche porte sur la modularité du contenu affiché à l’écran,  l’accessibilité d’un module depuis un autre, les modalités de navigation, l’annotation de ressources et la modélisation de tâches de conception.

Lisibilité des linéaires de vente (Grandes surfaces)

Contraintes sur la lisibilité physique, structurelle, catégorielle, thématique et globale de l’offre déployée sur un linéaire de grande surface. Préconisations de disposition des produits pour satisfaire ces contraintes (pages 3 à 7).

Générateur de classifications dynamiques

Cette interface, connectée à une BD, permet de générer des regroupements d’ampoules électriques selon les valeurs choisies dans les différents menus. Un critère au minimum doit être renseigné. Le résultat de la recherche (une classe) peut être ordonné d’après la valeur des propriétés figurant dans les colonnes (tous les produits du même nom, par exemple, tous les produits délivrant la même quantité de Lumen). Cette fonctionnalité génère des sous-classes à l’intérieur de la classe-résultat.