@conference {757,
	title = {Alexa vs. Siri vs. Cortana vs. Google Assistant: A Comparison of Speech-Based Natural User Interfaces},
	booktitle = {Advances in Human Factors and Systems Interaction},
	year = {2017},
	month = {06/2017},
	publisher = {Springer International Publishing},
	organization = {Springer International Publishing},
	address = {Cham},
	abstract = {<p>Natural User Interfaces (NUI) are supposed to be used by humans in a very logic way. However, the run to deploy Speech-based NUIs by the industry has had a large impact on the naturality of such interfaces. This paper presents a usability test of the most prestigious and internationally used Speech-based NUI (i.e., Alexa, Siri, Cortana and Google{\textquoteright}s). A comparison of the services that each one provides was also performed considering: access to music services, agenda, news, weather, To-Do lists and maps or directions, among others. The test was design by two Human Computer Interaction experts and executed by eight persons. Results show that even though there are many services available, there is a lot to do to improve the usability of these systems. Specially focused on separating the traditional use of computers (based on applications that require parameters to function) and to get closer to real NUIs.</p>},
	keywords = {Human factors, Intelligent personal assistant, Smart device},
	isbn = {978-3-319-60366-7},
	doi = {https://doi.org/10.1007/978-3-319-60366-7_23},
	url = {https://link.springer.com/chapter/10.1007/978-3-319-60366-7_23},
	author = {L{\'o}pez, Gustavo and Quesada, Luis and Guerrero, Luis A.},
	editor = {Nunes, Isabel L.}
}
@inbook {517,
	title = {Ubiquitous Notification Mechanism to Provide User Awareness},
	booktitle = {Advances in Ergonomics in Design},
	volume = {485},
	year = {2016},
	pages = {689{\textendash}700},
	publisher = {Springer International Publishing},
	organization = {Springer International Publishing},
	address = {Cham},
	abstract = {<p>Awareness could be defined as the knowledge that the user has of a particular activity, either individual or collaborative. Good awareness mechanisms provide information to the user at the right time so that s/he can know what is required for her/him to do before s/he is required to do it. Notification mechanisms are a key factor to provide awareness. Ubiquitous technologies can change the paradigm in which notifications are delivered to users. This paper describes the concept and characteristics of awareness, and how researchers have applied different notification mechanisms to provide it. With the lessons learned from 4 project implementations, we propose a service-based plug-and-play framework that models different notification mechanisms that could be used to provide user awareness.</p>},
	keywords = {Human factors, Ubiquitous Computing, User awareness, User experience design, Warning design},
	isbn = {978-3-319-41983-1},
	doi = {10.1007/978-3-319-41983-1_62},
	url = {http://dx.doi.org/10.1007/978-3-319-41983-1_62},
	author = {L{\'o}pez, Gustavo and Guerrero, Luis A.},
	editor = {Rebelo, Francisco and Soares, Marcelo}
}
