Special issue on “Recent Advancements in Ubiquitous Computing”
Special issue on??Recent Advancements in?Ubiquitous Computing?
Macarena?Espinilla 0 1 2 3
Jun?Liu 0 1 2 3
Juan?M.?Garc?a?Chamizo 0 1 2 3
0 Department of Computer Science, University of Jae?n , Jae?n , Spain
1 Juan M. Garci?a-Chamizo
2 Department of Computer Technology, University of Alicante , Alicante , Spain
3 School of Computing and Mathematics, Ulster University , Coleraine , UK
Ubiquitous Computing is an exciting area that aims to
promise pervasive and reliable computing solutions and
communication services anytime and anywhere. Ubiquitous
Computing fuses multiples lines of scientific and
engineering research, providing significant interests from both
academia and industry. The emergence of this technology is a
natural outcome of research and technological advances in
a wide variety of areas including wireless and sensor
networks, embedded systems, mobile computing, distributed
computing or agent technologies.
This special issue, conceived during the 9th
International Conference on Ubiquitous Computing & Ambient
Intelligence (UCAmI 2015), held in Puerto Varas,
Patagonia, Chile from 1st to 4th December 2015, comes from an
open call that pursued a representative collection of recent
advancements within ubiquitous computing. These eleven
papers show an interesting variety of applications, each of
one addressing a different alternative technique. We hope
that the readers will find new inspiration for their research
from this special issue.
The first paper, ?Interpreting human activity from
electrical consumption data using reconfigurable hardware and
Hidden Markov Models?, presents the design and
development of low cost and embedded hardware tools to obtain
disaggregated power consumption with the aim to interpret
human activity, providing successful results.
The second paper, ?Self-configuration in humanized
cyber-physical systems?, proposes a new self-configuration
technology that uses simple binary operations in order to
reduce the convergence time, improve the scalability and
address the dynamism introduced by humans into
The third paper, ?Human aspects of ubiquitous
computing: a study addressing willingness to use it and privacy
issues?, identifies the human aspects related to
ubiquitous systems, focused on people?s willingness to use them
and privacy concerns, offering relevant and not evident
The fourth paper, ?Multi-resident activity tracking and
recognition in smart environments?, proposes two
different approaches in order to tackle the multiple resident and
concurrent activity recognition problem in smart homes
equipped with interaction-based sensors and with
multiple residents based on the use of a factorial hidden Markov
model as well as a nonlinear Bayesian tracking.
The fifth paper, ?Extended body-angles algorithm to
recognize activities within intelligent environments?,
proposes a method able to recognize movements through
single samples of modeled movements using a Kinect device.
The provided results in the evaluation and comparison
demonstrate the potential of the proposed method as a good
option to perform recognition of postures and movements.
The sixth paper, ?Don?t go in there! using the APEX
framework in the design of ambient assisted living
systems?, presents an approach to design ambient assisted
living systems that is illustrated through the design of a
smart environment within a care home for older people,
providing also the set of lessons learned for the future
design of ambient assisted living systems.
The seven paper, ?Facial expression recognition in
ageing adults: from lab to ambient assisted living?, presents an
application that uses a webcam and aims to recognise six
basic emotions (happiness, sadness, anger, fear, disgust and
surprise) as well as a neutral state of ageing adults from
their facial expression in real-time, obtaining a suitable
The eighth paper, ?A distributed bug analyzer based on
user-interaction features for mobile apps? proposes a
distributed bug analyzer that uses digital imaging processing
to find bugs by using an interest point detector and
descriptor for image comparison. An interesting case study is
conducted with 38 applications.
The ninth paper, ?A systematic literature review about
technologies for self-reporting emotional information?,
studies the technologies used for emotional self-report as
well as the issues regarding these technologies, such as
privacy, interaction mechanisms, and how they are evaluated.
The tenth paper, ?Optimal hybrid broadcast
scheduling and adaptive cooperative caching for spatial queries in
road networks?, presents a proposal in order to handle the
environment effectively when the data objects are increased
to a large number in broadcast system and physical
restrictions of clients which include low bandwidth, mobility,
limited energy and capacity.
The eleventh paper, ?Automatic recognition of the
American sign language fingerspelling alphabet to assist
people living with speech or hearing impairments?
proposes system based on tracking devices focused on leap
motion and intel realsense for signs recognition. The paper
presents an extensive evaluation in which remarkable
recognition accuracy was achieved with selected signs.
The guest editors would like to take this opportunity to
thank all the authors for the efforts they put in the
preparation of their manuscripts and for their valuable
contributions. We wish to express our deepest gratitude to the
referees who provided very useful and thoughtful feedback to
Finally, our sincere thanks go to the Editor-in-Chief,
Prof. Vincenzo Loia, of Journal of Ambient Intelligence
and Humanized Computing for his kind support, advice,
and encouragements throughout the preparation of this