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This paper deals with concepts about the electromyographic signal (EMG), which is a record of action potentials presented by the muscles, and presents the development of a low-cost conditioning circuit for electromyographic signals, including component blocks capable of signal processing and adaptation for microcontrolling devices.
According to industry predictions, by 2020 there will be a plethora of heterogeneous devices connected in the so-called Internet of Things (IoT). There are still many open problems in the field and this article represents the beginning of a research on the suitability of a functional language, Elixir, for building IoT software. Elixir runs on the Erlang Virtual Machine, initially built to run highly...
Removal of motion artifacts (MA) from wrist-type photoplethysmographic (PPG) signal recordings during exercise is a difficult problem, since the MA during exercise can be very strong. In this paper, a modified independent component analysis (ICA) algorithm to remove MA is proposed. The proposed algorithm relies on the negentropy scores of the linear combinations of the signal data to achieve maximum...
Many people use on-vehicle information devices on a daily basis. These devices have many useful functions for route guidance, audio services, and gathering traffic information. In addition, smartphones are being used as on-vehicle information devices because of the ubiquity of low-priced applications that can be used.
The Internet of Things extends the Internet connection from people-to-people to people-to-machine or machine-to-machine. This promising research and market field provides technologies and models that allow people to communicate with different hardware with different purposes. This article seeks to introduce the integration between the smartphone messenger Telegram and the Arduino platform using Telegram...
The aim of this study is to analyze the impact of the propagation channel in the performance of a Bluetooth low energy wireless network operating in indoor environments. The Bluetooth low energy model were developed in OPNET taking into account the main network low layers (physical, medium access and control, data link), turning possible an accurate analysis of the network behavior during the exchange...
The Internet of Things is emerging as a network to connect any device and objects. In this paper we propose an architecture and implementation of a wireless sensor network using standard IoT protocols. Using CoAP, 6LoWPAN, RPL and 802.15.4 standard, we show an application of monitoring physical characteristics of an indoor environment.
Wireless Sensor Networks (WSN) are the basis for several applications including environmental and health monitoring, industrial and home automation, consumer electronics connectivity, and public safety, being a key technology for Internet of Things and Smart Cities development. Software-defined networking (SDN) paradigm could reduce complexity in WSN configuration, management and re-tasking. However...
Billions of devices are expected to be Internet-enabled by 2020, levering the Internet of Things (IoT). Device discovery is a problem of finding useful devices in order to accomplish a task, and it constitutes a major challenge for IoT. Once a device finds another with the desired characteristics and establishes a negotiated communication, novel services can be generated through cooperation. Several...
A new operational transconductance amplifier (OTA) based on the conventional triple folded cascode (TFC) structure is presented. Using the proposed positive feedback method, the dc-gain of the amplifier enhanced significantly. The simulation results for the designed OTA in a typical 0.35µm CMOS technology show more than 20dB dc-gain enhancement while bandwidth, output voltage swing range, and the...
Differential signaling is commonly used in a large number of consumer electronics devices, including USB 3.0 channels. However, skew in differential signaling can adversely affect a channel's performance. Most of the analysis has been done on individual components of a channel; however, there is not much work done in analyzing the effect of skew on the overall system performance, from transmitter-to-receiver...
A new ultra low voltage (ULV) dual- rail NOR gate is presented in this paper, which uses the semi-floating-gate (SFG) technique to speed up the logic circuit. Higher speed in the lower supply voltages and robustness against the input signal delay variations, are the main advantage of the proposed gate in comparison to the previously reported domino dual-rail NOR gates. The simulation results in a...
The Educadaisy Book Player for mobile platforms developed for educational use is presented. The player architecture, compatible with Daisy3 (Digital Accessible Information System v.3) is presented and evaluated. The performance tests have shown its high efficiency, presenting features for Education, being inclusive for the visually impaired.
This work presents an interactive low cost set-top box solution for IPTV and free-to-air DTV. A Ginga-NCL middleware was developed and ported to a Raspberry-Pi platform. Some limitations were identified in this platform and countermeasures were proposed.
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