Lorenzo Cavalieri

Method to design adaptable and adaptive user interfaces

In order to study and develop adaptive user interfaces with the purpose to guarantee socialization, safety and environmental sustainability in a domestic day-by-day living space, a new method of holistic and adaptive user interface is proposed to support the modelling of information related to the user and the context of the interaction to generate the user profiles, subjects older than 40 years with different levels of technology affinity have been considered. The new adaptive user interfaces prototypes will be tested through different use cases in the context of smart home environments.

Design Adaptable and Adaptive User Interfaces: A Method to Manage the Information

Designing a multi-user adaptive interface means designing for diversity in end-users and contexts of use, and implies making alternative design decisions, at various levels of the interaction project, inherently leading to diversity in the final design outcomes. Nowadays Adaptive User Interfaces (AUIs) is becoming one of the major objectives addressed by Human Computer Interaction research. The present study provides an overview about the methods currently applied to the definition and development of AUIs. In order to study and develop adaptive user interfaces with the purpose to guarantee socialization, safety and environmental sustainability in a domestic day-by-day living space, a new method of holistic and adaptive user interface is proposed to support the modeling of information related to the user and the context of the interaction. In order to generate the user profiles, subjects older than 40 years with different levels of technology affinity will be considered. These prototypes will be tested through different use cases in the context of smart home environments. The final goal is to produce smart objects and consumer goods able to automatically satisfy the different skills, abilities, needs and human preferences, in an environment where each solutions address different individuals.

How Older People Who Have Never Used Touchscreen Technology Interact with a Tablet

Touchscreen technologies have become increasingly common in personal devices, so it seems necessary to improve their accessibility and usability for the older people. In the past years, a lot of studies have been conducted to improve touch interfaces, however, most them do not consider older people with very low attitude with ICTs. Moreover, the majority of studies date back 2014, so they lack to consider the most innovative technologies available today. The present study involves a sample of older people without previous experience with ICTs with the aim of analyzing how basic features of a touchscreen interface affect their performances with typical touch-gestures. A total of 22 participants have been involved. Results partially confirm the existent literature and partially reveal new interesting findings that can be useful to improve the touch screen accessibility for older people.

Adaptive Interface for Smart Home: A New Design Approach

In an inclusive and accessible smart environments context the implementation of the “design for all” method presents several critical issues. In fact, the universal design represents a difficult challenge for the designer because it depends on the complexity of human intentions in a particular time and place. For this reason, we propose a new approach that aims to support the design of inclusive environments by improving the user-environment interaction.

The User-Product Ontology: A New Approach to Define an Ontological Model to Manage Product Searching Based on User Needs

Search engines play an important role in determining the success of e-commerce. Despite many efforts have been made to improve searching methods (SM) they remain mostly limited to semantic elaboration of keywords. This implies that the SM are not capable of supporting the research of products that best satisfy customers, according to their characteristics and background. To overcome this limitation, this paper introduces an approach able to define a new ontological model that formalizes the knowledge necessary to implement a search engine capable to guide the customer to search the desired product or service according to his/her characteristics and needs. To this purpose, three essential aspects have been considered: a User Ontology (UO), a Product Ontology (PO) and rules (or properties) to link the user and product ontologies. The described approach is applied, as an example, to the products class known as Smart Objects that are part of the Internet of Things (IoT) market.

A Universal Design Method for Adaptive Smart Home Environment

Nowadays to design a product able to adapt to end-users with different needs and abilities it is necessary to manage a multitude of information coming from the analysis of different context of use. This means that we have to handle parallel and interdependent UCD multiple process. This research aims to define a methodology, which may apply this philosophy into design practice. In particular, it aims to provide tools to summarize the information needed to analyze user characteristics and needs, allows the designer to extrapolate the user’s needs and support the selection of prototype technologies suitable to the user categories.

Introducing Wearables in the Kitchen: An Assessment of User Acceptance in Younger and Older Adults

Wearable computers allow users to record and access information at any time. The adoption and use of such devices is largely dependent on the users’ acceptance of the technology. Previous studies investigated technology acceptance of wearables without having end-users directly trying the technology. The present paper aims at assessing the user acceptance of a wearable device to support cooking related activities, together with aspects of usability and experience of use. To this end, we developed a kitchen apron with embedded commands for navigating through the contents of a digital cookbook and asked a group of younger (N = 15, mean age 23.9 SD = 2.5) and older users (N = 15, mean age 30.3 SD = 7.6) to deploy it while preparing a recipe. Respondents’ opinions were collected using questionnaires after they had accomplished the cooking task required. Overall, the kitchen apron was well received by both younger and older adults. Findings suggest that the perceived usefulness of the device and the compatibility of it with users’ common activities accounted for the intention to adopt and use a wearable device in the kitchen.

A Haptic Knob as an Innovative User Interface for Visually-Impaired

The present work describes an early research activity on a haptic user interface to assist visually impaired in using a multi-experience shower that saves energy and water and informs the user about current consumptions. The user interface aims to joint visual, tactile and kinesthetic feedbacks to improve digital contents accessibility. The knob is applied both to interact with the graphic interface by able-bodied persons and to emboss Braille text to drive the blind in navigating the menu items. The developed prototype is then illustrated.

An Interactive Virtual User Interface for Integrating Blind Persons in Home Environments

Accessibility to graphical user interfaces by visually impaired persons is generally enabled through systems, which reproduce the lexical structure of the user interface to a non-visual form, mainly employing 3D audio output techniques. Two main critical issues have been identified: (i) most interfaces address the needs and abilities of sighted users and consequently the reproduction is only a translation from one language to another; (ii) blind users are generally not involved in the development stage due to the cost of prototyping. The present work proposes an interactive user interface to control a multi-sensory shower accessible by both sighted and blind users and able to adapt its control knob to reproduce Braille texts. Such function is realized by the integration of an electrotactile feedback device and adopts soft touch finishing to better stimulate touch sensations. Haptic technologies have been exploited to create a virtual high-fidelity prototype to assess individual end-users’ response during the user interface design process. The paper illustrates the designed interface to assist blind users in home environments and the adopted virtual prototyping technique to address the above-mentioned issues.Copyright

Study and implementation of a multimodal system to support virtual prototyping

Multimodal sensory stimulation is one of the most important challenges in human-computer interaction. When we want to play a virtual system it is important that the reproduced signals to stimulate the different sensory channels are synchronized with each other. This paper presents the study and implementation of a multimodal stimulation system. The proposed system is a step forwards a previous developed tactile platform (called Ipertouch 1.0). Main novelties regard the introduction of audio and visual feedbacks and signals synchronization. For acoustic stimulation, an auralization algorithm is applied on records of rubbing finger on a given class of material. For visual stimulation, a 3D rendering software is developed. Tests are performed to evaluate the degree of synchronism among the three different sensory channels.