149,344 research outputs found
An Embedded Biometric Sensor for Ubiquitous Authentication
Communication networks and distributed technologies
move people towards the era of ubiquitous computing. An
ubiquitous environment needs many authentication sensors for
users recognition, in order to provide a secure infrastructure for
both user access to resources and services and information
management. Today the security requirements must ensure
secure and trusted user information to protect sensitive data
resource access and they could be used for user traceability inside
the platform. Conventional authentication systems, based on
username and password, are in crisis since they are not able to
guarantee a suitable security level for several applications.
Biometric authentication systems represent a valid alternative to
the conventional authentication systems providing a flexible einfrastructure
towards an integrated solution supporting the
requirement for improved inter-organizational functionality. In
this work the study and the implementation of a fingerprintsbased
embedded biometric system is proposed. Typical strategies
implemented in Identity Management Systems could be useful to
protect biometric information. The proposed sensor can be seen
as a self-contained sensor: it performs the all elaboration steps on
board, a necessary requisite to strengthen security, so that
sensible data are securely managed and stored inside the sensor,
without any data leaking out. The sensor has been prototyped via
an FPGA-based platform achieving fast execution time and a
good final throughput. Resources used, elaboration times of the
sensor are reported. Finally, recognition rates of the proposed
embedded biometric sensor have been evaluated considering
three different databases: the FVC2002 reference database, the
CSAI/Biometrika proprietary database, and the CSAI/Secugen
proprietary database. The best achieved FAR and FRR indexes
are respectively 1.07% and 8.33%, with an elaboration time of
183.32 ms and a working frequency of 22.5 MHz
A Survey on IT-Techniques for a Dynamic Emergency Management in Large Infrastructures
This deliverable is a survey on the IT techniques that are relevant to the three use cases of the project EMILI. It describes the state-of-the-art in four complementary IT areas: Data cleansing, supervisory control and data acquisition, wireless sensor networks and complex event processing. Even though the deliverable’s authors have tried to avoid a too technical language and have tried to explain every concept referred to, the deliverable might seem rather technical to readers so far little familiar with the techniques it describes
Context for Ubiquitous Data Management
In response to the advance of ubiquitous computing technologies, we believe that for computer systems to be ubiquitous, they must be context-aware. In this paper, we address the impact of context-awareness on ubiquitous data management. To do this, we overview different characteristics of context in order to develop a clear understanding of context, as well as its implications and requirements for context-aware data management. References to recent research activities and applicable techniques are also provided
Validation Of Naval Platform Electromagnetic Tools Via Model And Full-Scale Measurements
Reliable EMC predictions are very important in the design of a naval platform's topside. Currently, EMC predictions of a Navy ship are verified by scale model and full-scale measurements. In the near future, the validation of software tools leads to an increased confidence in EMC predictions and (hopefully) removes the need for scale model measurements. In general, full-scale verification measurements will remain necessary, although perhaps fewer measurements will be required. The paper presents our topside design experience, from rough estimations 40 years ago, to analytical calculations and model measurements 20 years ago, to the numerically supported process as it is now. It shows the process of validating simulation tools with model and full-scale measurements. It also describes the challenges encountered and the deficiencies of commercial tools used now and the roadmap for Thales Naval Netherlands towards the integrated tools of the future
ITERL: A Wireless Adaptive System for Efficient Road Lighting
This work presents the development and construction of an adaptive street lighting system
that improves safety at intersections, which is the result of applying low-power Internet of Things
(IoT) techniques to intelligent transportation systems. A set of wireless sensor nodes using the
Institute of Electrical and Electronics Engineers (IEEE) 802.15.4 standard with additional internet
protocol (IP) connectivity measures both ambient conditions and vehicle transit. These measurements
are sent to a coordinator node that collects and passes them to a local controller, which then makes
decisions leading to the streetlight being turned on and its illumination level controlled. Streetlights
are autonomous, powered by photovoltaic energy, and wirelessly connected, achieving a high degree
of energy efficiency. Relevant data are also sent to the highway conservation center, allowing it to
maintain up-to-date information for the system, enabling preventive maintenance.Consejería de Fomento y Vivienda Junta de Andalucía G-GI3002 / IDIOFondo Europeo de Desarrollo Regional G-GI3002 / IDI
- …