46 research outputs found
Ubiquitous Computing
The aim of this book is to give a treatment of the actively developed domain of Ubiquitous computing. Originally proposed by Mark D. Weiser, the concept of Ubiquitous computing enables a real-time global sensing, context-aware informational retrieval, multi-modal interaction with the user and enhanced visualization capabilities. In effect, Ubiquitous computing environments give extremely new and futuristic abilities to look at and interact with our habitat at any time and from anywhere. In that domain, researchers are confronted with many foundational, technological and engineering issues which were not known before. Detailed cross-disciplinary coverage of these issues is really needed today for further progress and widening of application range. This book collects twelve original works of researchers from eleven countries, which are clustered into four sections: Foundations, Security and Privacy, Integration and Middleware, Practical Applications
Adoption of Internet Services in the Enlarged European Union: Lessons from the Internet Banking Case.
Abstract not availableJRC.J-Institute for Prospective Technological Studies (Seville
Extending the Bayesian classifier to a context-aware recommender system for mobile devices
Mobile devices that are capable of playing Internet videos have become wide-spread in recent years. Because of the enormous offer of video content, the lack of sufficient presentation space on the screen, and the laborious navigation on mobile devices, the video consumption process becomes more complicated for the end-user. To handle this problem, people need new instruments to assist with the hunting, filtering and selection process. We developed a methodology for mobile devices that makes the huge content sources more manageable by creating a user profile and personalizing the offer. This paper reports the structure of the user profile, the user interaction mechanism, and the recommendation algorithm, an improved version of the Bayesian classifier that incorporates aspects of the consumption context (like time, location, and mood of the user) to make the suggestions more accurate
D21.3 Analysis of initial results at EuWIN@CTTC
Deliverable D21.3 del projecte europeu NEWCOM#The nature of this Deliverable of WP2.1 (“Radio interfaces for next-generation wireless systems”) is mainly descriptive and its purpose is to provide a report on the status of the different Joint Research Activities (JRAs) currently ongoing, some of them being performed on the facilities that are available at EuWInPeer ReviewedPreprin
Clustering Projects for eLearning Interoperability
[ES]Desde el principio de la disciplina, el eLearning ha sido un campo novedoso que ha generado nuevo software, sistemas, contenidos y herramientas con los que se está experimentando. la interoperabilidad se convierte, en este contexto, en un problema. Los sistemas consolidados y empleados regularmente tienen que ser capaces de interoperar con otros nuevos. Este artículo trata sobre cómo varias investigaciones y lproyectos de desarrollo se reunieron para encontrar una solución a este problema, proporcionando especificaciones abiertas y normas, además de ibre, implementaciones de referencia de código abierto.[EN] Since the beginning of the discipline, eLearning has been about innovation. New
software, systems, contents and tools are being created and experimented with and in constant
evolution. But when systems, contents and tools become successful and part of the regular
infrastructure of educational institutions, interoperability becomes an issue. Systems that are
consolidated and regularly used need to be able to interoperate with new ones. And the new
tendencies need to fit within the current infrastructure. This paper states how several research
and development projects with heterogeneous funding sources and locations worldwide,
gathered together to find a solution to this common problem, providing open specifications and
standards, plus Free/Libre, Open Source reference implementations
Clustering projects for eLearning interoperability
Since the beginning of the discipline, eLearning has been about innovation. New software, systems, contents and tools are being created and experimented with and in constant evolution. But when systems, contents and tools become successful and part of the regular infrastructure of educational institutions, interoperability becomes an issue. Systems that are consolidated and regularly used need to be able to interoperate with new ones. And the new tendencies need to fit within the current infrastructure. This paper states how several research and development projects with heterogeneous funding sources and locations worldwide, gathered together to find a solution to this common problem, providing open specifications and standards, plus Free/Libre, Open Source reference implementations.This work has been funded by the “Spanish Ministry of Science and Innovation” (http://micinn.es) in project LearningApps in the program INNPACTO 2010, the project MiPLE code TIN2010-21695-C02-02.8 and Google Research Award.Peer ReviewedPostprint (published version
Design and Digital–material Possession: Sartre’s potential for mobile UI design
Jean-Paul Sartre’s conceptualisation of material possession contains rich insights for this study located at the intersection of visual communication, mobile UI design, human–computer interaction and design philosophy. Possession is a relational concept concerning more than just the ownership of things. It contributes to an understanding of self-identity via an individual’s relationship with the objects they see, use, use up and create. Initial ideas for a contemporary conceptualisation of digital-material possession presented in this study expands on Sartre’s philosophy enabling technologies such as the iPhone, including its hardware and software components, to be positioned as an entanglement of possessions. Likewise, the unique relationships between humans and their non-human technological and appearance-dominant things can be included among the many human–possession relationships that constitute an individual’s self-identity. This thesis uses the set of iOS7 app icon graphics and their redesign, conducted as part of this study, in the critique, expansion and application of Sartre’s material possession to the contemporary context. Reflection on the redesigned iOS prototypes shifted the original practice-based design research approach, to instead underpin a Research through Design investigation of the nature and agency of iOS graphics as exemplars of appearance-dominant digital-material possessions. Reflection on the prototypes through the lens of possession created a feedback loop between the speculative prototypes, Sartre’s philosophy of material possession and its expansion for the contemporary digital-material context. Possession and digital-material possession have interdisciplinary and intradisciplinary relevance. In the design context, together they enable increased understanding of the role of the designer, their design activities and design outcomes, and the role of individual users of designed things, their co-creation activities and outcomes. Beyond design, digital-material possession highlights Sartre’s contribution to the philosophy of technology
Multi-dimensional clustering in user profiling
User profiling has attracted an enormous number of technological methods and
applications. With the increasing amount of products and services, user profiling
has created opportunities to catch the attention of the user as well as achieving
high user satisfaction. To provide the user what she/he wants, when and how,
depends largely on understanding them. The user profile is the representation of
the user and holds the information about the user. These profiles are the
outcome of the user profiling.
Personalization is the adaptation of the services to meet the user’s needs and
expectations. Therefore, the knowledge about the user leads to a personalized
user experience. In user profiling applications the major challenge is to build and
handle user profiles. In the literature there are two main user profiling methods,
collaborative and the content-based. Apart from these traditional profiling
methods, a number of classification and clustering algorithms have been used
to classify user related information to create user profiles. However, the profiling,
achieved through these works, is lacking in terms of accuracy. This is because,
all information within the profile has the same influence during the profiling even
though some are irrelevant user information.
In this thesis, a primary aim is to provide an insight into the concept of user
profiling. For this purpose a comprehensive background study of the literature
was conducted and summarized in this thesis. Furthermore, existing user
profiling methods as well as the classification and clustering algorithms were investigated. Being one of the objectives of this study, the use of these
algorithms for user profiling was examined. A number of classification and
clustering algorithms, such as Bayesian Networks (BN) and Decision Trees
(DTs) have been simulated using user profiles and their classification accuracy
performances were evaluated. Additionally, a novel clustering algorithm for the
user profiling, namely Multi-Dimensional Clustering (MDC), has been proposed.
The MDC is a modified version of the Instance Based Learner (IBL) algorithm.
In IBL every feature has an equal effect on the classification regardless of their
relevance. MDC differs from the IBL by assigning weights to feature values to
distinguish the effect of the features on clustering. Existing feature weighing
methods, for instance Cross Category Feature (CCF), has also been
investigated. In this thesis, three feature value weighting methods have been
proposed for the MDC. These methods are; MDC weight method by Cross
Clustering (MDC-CC), MDC weight method by Balanced Clustering (MDC-BC)
and MDC weight method by changing the Lower-limit to Zero (MDC-LZ). All of
these weighted MDC algorithms have been tested and evaluated. Additional
simulations were carried out with existing weighted and non-weighted IBL
algorithms (i.e. K-Star and Locally Weighted Learning (LWL)) in order to
demonstrate the performance of the proposed methods. Furthermore, a real life scenario is implemented to show how the MDC can be used for the user
profiling to improve personalized service provisioning in mobile environments.
The experiments presented in this thesis were conducted by using user profile
datasets that reflect the user’s personal information, preferences and interests.
The simulations with existing classification and clustering algorithms (e.g. Bayesian Networks (BN), Naïve Bayesian (NB), Lazy learning of Bayesian
Rules (LBR), Iterative Dichotomister 3 (Id3)) were performed on the WEKA
(version 3.5.7) machine learning platform. WEKA serves as a workbench to
work with a collection of popular learning schemes implemented in JAVA. In
addition, the MDC-CC, MDC-BC and MDC-LZ have been implemented on
NetBeans IDE 6.1 Beta as a JAVA application and MATLAB. Finally, the real life
scenario is implemented as a Java Mobile Application (Java ME) on NetBeans
IDE 7.1. All simulation results were evaluated based on the error rate and
accuracy
D13.2 Techniques and performance analysis on energy- and bandwidth-efficient communications and networking
Deliverable D13.2 del projecte europeu NEWCOM#The report presents the status of the research work of the
various Joint Research Activities (JRA) in WP1.3 and the results
that were developed up to the second year of the project. For
each activity there is a description, an illustration of the
adherence to and relevance with the identified fundamental
open issues, a short presentation of the main results, and a
roadmap for the future joint research. In the Annex, for each
JRA, the main technical details on specific scientific activities
are described in detail.Peer ReviewedPostprint (published version