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Due to the shutdown of the analog TV signal transmissions and the proliferation of new installations of the Brazilian digital TV system throughout the country, it is necessary a deeper understanding of the main characteristics of the digital TV propagation channels and how to precisely estimate the received power in the new TV devices to an efficient deployment project. In general, the existing propagation...
The use of sensors and actuators has grown vertiginously in recent years. However, a diversity of communication standards to connect transducers to buses and networks has proliferated in different ways. The plurality of protocols required the creation of a standard to allow interoperability between transducers and networks. In this context, the IEEE1451 (Standards for Smart Transducer Interface for...
GLOBAL ITV project is an initiative for global standards applied to iTV. Ginga-NCL and HbbTV integration in a terminal device was reached including compatibility for HTML5 in a hybrid environment. Next steps consists to establish a web-based platform and aggregate iTV players as a browser plug-ins.
People and companies occupy booths and exhibition areas during fairs and expos. However, visitors may have a difficult time finding where are businesses they are interested on. One way to optimize visitation to fairs and exhibitions would be adoption of intelligent booths, capable of deducting one's interests and pointing locations of suggested projects and products chosen for that specific person...
This paper presents an extension of the standard Universal Plug and Play (UPnP) and the use of a modular architecture with two layers in order to adapt it to the integration of home automation subsystems. Then, this extended pattern is used in the upper layer for controlling and the integration of the subsystems. In the bottom layer, each subsystem uses the most appropriate communication technology...
Currently, social media user interaction is surpassing the television interactive programs. However, with the increase of mobile phones and digital television receivers connected to the Internet, new kinds of interactive applications can be deployed. This paper proposes an application for second screen devices that allow users to send messages, and immediately display on a digital television screen...
We experimentally investigated the effect of the use of a high-resolution 4K tablet on brain activity and physical and mental stress while engaged in searching tasks. The results showed NIRS, an index of nervous system activity, to be significantly higher during searching tasks with 4K content than with 2K content, whereas LF/HF (level of sympathetic nerve activity) and blinking rates during the first...
An application of active inductors in a CMOS LNA with inductive partial degeneration in 0.35µm technology is presented. Both, the inductor of the partial degeneration and the output load inductor, are actives. The results are satisfactory, validating the compact design and demonstrating the technical feasibility of this design for use in several electronic RF devices.
This paper presents a recommendation system based on sentiment analysis of sentences extracted from Social Networks considering an algorithm which depends on the adverb found in the sentence. Furthermore, the recommendation system has a low complexity, therefore the perceived impacts on the analysis of energy consumption on electronic devices is almost negligible.
Open Hardware and Free Software have both active communities. Open source software projects have helped many companies launch their products, but that has not happened in the same proportion for hardware. Assistive technology industry is known to be extremely restricted to proprietary solutions, which may lead to slower development cycles as there is a smaller community of device developers. This...
In this article, we propose three different neural networks architectures for predicting the received signal power of the Brazilian digital TV system based on the effective transmission heights for each frequency channel and the points of reception inside the coverage area. The presented models will be analyzed and compared with the main propagation models used for digital TV described in the scientific...
This work describes a top level architecture for a general cryptographic process targeting FPGA. This architecture can be implemented for any crypto system, a symmetric or asymmetric process. The architecture allows pipeline implementation on operations. The results measured with Elliptic Curve Cryptography (ECC) presents that this architecture is efficient in FPGA technology and is an option focusing...
The study of quality reception of audio signals in auditoriums is relevant because this fact determines the user's Quality of Experience (QoE). This paper presents experimental results regarding to the impact of the linear phase variations on the voice quality index. Speech files are played using different phases, and each audio transmitted is individually saved. Later, the original and the transmitted...
This paper presents an implementation of a high power 32-bit Ternary Digital to Analog Converter (“TriDAC”) with a new topology, originally designed as a stimulus generator for audiometry, capable of a very high dynamic range of more than 170 dB.
In medicine, sports, bodybuilding, dressmaking etc, it is necessary to reliably measure human body. The device here presented can estimate without physical contact the perimeter of human body parts as waist, thigh, biceps etc. It can also measure the circumference of objects like tree trunks. The device actually scans the shape of the object's cross section and the perimeter measure is a byproduct...
One type of sensor that has received much fame and importance is the interdigital capacitive sensors, because with a small amount of solution these types of sensors can provide very accurate and effective results. This work aims to build a microcontrolled circuit capable of measuring the pH of a solution (whose operating principle is based on the behavior of an interdigital capacitive sensor). The...
The 5% of the world population has a sensorial disability (visual or hearing). Movies are part of our culture and they are not being accessible for these persons. We present a low cost technology to transmit the audiodescription to the spectator's smartphone. This system also sends the subtitles (in multiple languages), and the sign language interpreter to Smartphone or augmented reality glasses....
Detecting and tracking people in video have a wide variety of applications in computer vision. However the development of robust methodologies for these purposes are challenging due to complexity of the scenes. In this paper, we propose a real-time algorithm for people detection and tracking by tridimensional depth estimation in indoor environment. The approach is based on people detection and stereo...
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