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This project aims to develop a yaw controller system for a CubeSat prototype, which tracks a remote set point signal. This prototype is oriented to education and entertainment in aerospace technologies. Aiming to reducing the costs, commercial off-the-shelf devices (COTS) were used. Thus, a Atmel 8-bit AVR microcontroller was utilized for computational work, a couple of 2.4GHz transceiver for communication...
The lack of interactivity seems to be one of the most common problem in distance learning. In this context, this study proposes an e-learning platform based on IMS infrastructure that is able to improve the interaction among students and instructors. The interactivity offered by the proposed scheme was considered 65% equal or better than the live class, demonstrating how efficient this kind of technology...
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...
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...
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...
Plastic materials form an important constituent of interconnect devices. Wideband characterization of the dielectric properties of interconnect plastics is indispensable to characterize the signal integrity performance of interconnects, which are used in a large number of consumer electronic devices. In this paper, wideband dielectric characterization of Triethylene Glycol Dimethacrylate Ester (TrEGDMA)...
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....
This paper will analyze the CLL (Capacitively Load Loop) structure applied on the cave form on the patch plane surface of a planar UWB (Ultra Wide Band) antenna. The purpose is to improve the features of the antenna for application in the new generation of WLAN (Wireless Local Area Network). Simulations were done with the insertion of the metamaterial in several distinct configurations. It will be...
This article presents an Augmented Reality App for musical learning. The App works by verifying whether sequences of musical notes were correctly colored in a printed pentagram (target). Meanwhile, an animation in AR with a 3D character dancing to the rhythm of the melody is initiated. It was tested with six children and the results point towards the great potential of this tool for enhancing children's...
4D cinema combines stereoscopic movies with additional physical elements providing different effects related to the content, such as scent, vibration and wind. This work describes the Player5D: an interactive 4D film system built upon open source software, mainly the Blender game engine and Python libraries to communicate with physical effects hardware. Complementary, interactive games corresponding...
Along with the breakthrough of the Internet of Things, a new city concept has attracted the attention of researchers, businesses and governments; it is the concept of Smart Cities. The purpose of this article is to present an IoT-based System for Smart Cities, called SIGINURB. The purpose of this System is to develop a range of applications that offers new services to students, employees, businesses...
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...
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