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This paper presents an alternative visual authentication scheme with two secure layers for desktops or laptops. The first layer is a recognition-based scheme that addresses human factors for protection against bots by recognizing a Captcha and images with specific patterns. The second layer uses a clicked based Cued-Recall graphical password scheme for authentication, it also exploits emotions perceived...
Owing to the transition of analogue to digital television, certain channels, that were used as guard to avoid interferences between the transmissions, are now unused. These channels are a potential medium of transmission for TVWS to bring Internet to remote areas where it's tough to install cable. To fulfil that TVWS becomes a reality, a database able to determine the unused channels in the UHF and...
Since the discovery of optical vortex (OV) until its application, they have been extensively exploited in the field of optics and photonics. In the last decade, this research has intensified in optical communications, where OV can be implemented as a new multiplexing technique that allows high transmission rates and scalability in systems due to their compatibility with current modulation and multiplexing...
SCADA systems, an acronym for Supervisory Control And Data Acquisition (supervisory, Control and data acquisition), are control networks that allow the monitoring and management of industrial processes remotely. In the beginning, their top priority was the availability of information bidirectionally between the control station and the remote units; however, the growing escalation of industrial systems,...
The significant advance of the Internet allows the inclusion of concepts like IoT (Internet of Things) and Cloud Computing. Nowadays, the deployment of systems and platforms of IoT and cloud facilitate the monitoring and remote management in different areas. However, The structural health monitoring presents networks with centralized topology, deployment of local data and a poor acquisition of seismic...
Currently, the American Sign Language (ASL), expressed through the use of body gestures (hand, face, torso) and perceived through the eyes, is the standard language of communication used by the Deaf community. Our main objective is to implement an automated translation system that is capable of translating ASL to English text using common computing environments such as a computer and a generic webcam...
The Internet of Things (loT) allows transform current Internet communication in an automatically way through Machine-to-Machine (M2M) communication. The IoT probably has become one of the most popular networking concepts that has the potential to bring out many benefits. However, IoT has brought some communications challenges. In the next three years, it is expected that more than 20 billion IoT devices...
Optical Network Virtualization has gained attention in recent years mainly from industry due to its direct application to Optical Data Centers. One of the main challenges involved in optical virtualization deals with the efficient mapping of virtual resources onto physical resources, specially when considering the intrinsic constraints of the elastic optical layer based on O-OFDM such as optical spectrum...
Currently and due to its wide use, the wireless networks in conformance with IEEE 802.11 standard are generating channels saturation, that provokes interference between themselves. IEEE 802.11n is one of the standards that offers greater benefits to improve the wireless network performance. In this paper we analyze the performance of wireless network in conformance with IEEE 802.11n standard to evaluate...
In this paper, performance evaluation of different transmitters enabling colorless operation for WDM— PONs applications is carried out. Injected Locked Fabry Perot Laser Diode (IL-FPLD) and Reflective Semiconductor Optical Amplifier (RSOA) in external seeding and wavelength reuse scheme are modeled in VPITransmissionMaker® simulation platform. Upstream transmissions are performed at 1.25 Gb/s with...
A recommender system is presented using a stereotyping model to create tourist classes in order to match up users with other user profiles according to the gender, age and tourism preferences. The prototype permits suggest points of interest and create a route planning in a city destination when users are classified in a category. This approach is implemented as a tourist tool called 10signals which...
This paper presents the design and implementation of an Internet of Thing (IoT)-based system for indoor localization using Bluetooth Low Energy (BLE) technology. Our solution consists of two main systems: an acquisition system and a central server, under the Client-Server paradigm and the IoT philosophy. We report the development of different modules: measurement (Bluetooth beacons), data aggregation...
In this paper are presented the results obtained after of evaluating three techniques of blind detection of spectrum holes used in Cognitive Radio (CR). The techniques evaluated correspond to the general technique of detection of energy levels, the method LAD BASED and the technique based on forward methods. The operation of these techniques was tested in simulation scenarios of a telecommunications...
This paper presents a strategy for a personal tutor based on intelligent agents and embedded systems. An educational tool is proposed to join the teaching and learning processes for a subject area in the teaching of electronics engineering. This tool meets software and hardware features from some learning parameters and the resources of an embedded platform. Technical knowledge, professional skills...
Several monitoring oriented applications in Wireless Sensor Networks (WSNs) are characterized by the necessity of two data-reporting modes: time-driven and event-driven. The former is used mainly for constantly supervising an area and the latter for event detection and target tracking. By switching between both modes a WSN can improve its energy-efficiency and accuracy of measurement processes, compared...
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