From its emergence to the present day, traffic light control systems have been widely used monitor and flow of vehicles. However, with increasing number public (bus) private vehicles (car, motorcycle, truck), urban centers are becoming more populous. Such phenomenon leads congestion increases environmental noise pollution. In order stem rise such problems, large cities adopting technological solutions, materializing concept smart cities. While observing management themselves, several...

Se utiliza el efecto que causa la presencia de una masa puntual en las vibraciones vigas para detección múltiples fisuras. presenta un método detectar varias fisuras vibrantes. modelo viga con masas puntuales y condiciones elásticas generales desarrollar tres ubicadas diferentes posiciones profundidades. obtienen ecuaciones diferenciales contorno forma natural aplicando técnicas del cálculo variaciones, se desarrolla algoritmo utilizando libres resultados numéricos obtenidos Ritz.

The constant increase in the number of vehicles, lack road traffic management and technological limitations light control devices, contribute to increasing congestion, environmental noise pollution. applications involving Internet Things (IoT) concept have been growing around world. Concerning problems found cities with large populations, IoT aim solutions that improve population living conditions. Most controller systems are locally programmed. In this case, all lights a city, besides be...

This paper presents the usage of Internet Things concept as a tool for retrofitting air conditioning systems. The proposed technology consists in an embedded system developed with open-source hardware platform and connected through wireless sensor actuator mesh network. By learning commands from conditioner's remote control, is capable implementing automatic control conditioner equipment. Through central command unit, it possible to configure timers turn on off all devices also adds...

This work presents the development of optically controlled reconfigurable antenna arrays. They are based on two patch elements with E-shaped slots, a printed probe, and photoconductive switch made from an intrinsic silicon die. Numerical simulations experiments have been shown to be in agreement, both demonstrate that frequency response arrays can efficiently reconfigured over different ISM bands, namely, 2.4 5 GHz. A measured gain 12.5 dBi has obtained through use radiating low-cost...

Drones have been used by criminals to smuggle cell phones and drugs into prisons. They also may cause accidents in airports other heavy flight traffic zones, so it is clear that interesting take control of drones some specific situations. This work part a project intended develop system (hardware software) the law-breaking drones. uses an embedded Linux board communicating via SPI with radio IC emulate controllers signal, admitting several parameters: raw, pitch, yaw roll. In addition, this...

Predictive maintenance systems for industrial electric motors are being developed using electronic sensors and wireless communication incorporated into ultra-low consumption circuits. If the circuit is consumption, a simple low-capacity rechargeable battery can power system years. However, use of batteries on large scale contributes to environmental pollution. To eliminate batteries, several energy harvesting techniques used make self-sustaining. In this sense, paper presents development an...

This work presents a complementary cross-coupled LC-VCO with Switched Varactor Array (SVA) and degeneration resistor core-based topology. The SV A application for discrete frequency control allows tuning range enhancement improved linearity reduced number of switches avoiding the losses in phase noise performance. From 4 prototypes Vcc <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$=1.2\mathrm{V}$</tex> current consumption IDC...

Systems involving solar energy harvesting typically need to be designed under the horizon of energetic environmental limitations that are inserted. The objective this work is investigate and raise capacity scavening in four selected indoor environments, aiming at applicability circuits mobile electronics or wireless sensor network, for example. For purpose, a photovoltaic wafer cell was characterized controlled environment. A circuit I-v curve extraction developed estimations maximum power...

The objective of this work is to explore the implementation a low-cost real-time monitoring and control water consumption together with user feedback interface. Water usage information will be available in cloud storage can accessed through mobile application. collected data allows access supervision both client- concessionaire. Project feasibility analyzed terms hardware software, as well each element required for design. simulations were carried out purpose verifying system operation,...

A novel method for fast and flexible fin field effect transistor (FinFET) prototyping using a Ga+ focused ion beam is presented. The width height control explored, aiming the successful fabrication of prototypes. This results in fins with negligible Ga incorporation, when compared to traditional milling techniques. Our multiple FinFET enables advanced device great flexibility regarding both number width. Working prototypes have been fabricated proposed definition method, electrical...

This paper presents an Antipodal Vivaldi Antenna (AVA) design, focusing on its constructional aspects. The main features analysed are the connector attachment structure and introduction of a polytetrafluoroethylene (PTFE) part that supports antenna laminate. Issues related to dielectric penetration by milling tools also addressed. proposed AVA was manufactured through low-cost prototyping process tested, achieving operational bandwidth from 5 18 GHz for reflection coefficient less than −10...

In this study are analyzed horn antennas to operating at X band (8 – 12 GHz) and manufactured by additive manufacturing method (AM). To construct the using AM was necessary made structure with acrylonitrile butadiene styrene (ABS) thermoplastic a 3D printer, then coated conductive surfaces. Were fabricated three different techniques: first antenna silver paint, second copper tape third plated. It is investigated performances of these in terms input reflection coefficient, gain, radiation...

This paper presents a fabrication process for integrated inductors on flexible substrate using simple and cost effective method. Kapton was the choice due to its attractive characteristics such as thermal stability electrical insulation. Metal layers were formed by deposition of thin Ni film onto seed Au electroplating improve adhesion between metal substrate. lines patterned lift-off served mask wet etching. SiO2 selected dielectric, also preceded Cr e-beam step enhance adhesion. Inductor...

The accelerated urbanization process can cause several traffic problems, such as congestion, environmental, and noise pollution [1]-[3]. system hardware developed consists of an actuator circuit, for the switching AC/DC lamps a sensor to check if are burnt out [4]. microcontroller's firmware performs all control logic, timing light safety each type crossing [5], [6]. For lights at intersections operate intended, wireless communication network with specific protocol was used mediate...

This paper presents the development and implementation of a wireless system for street lighting control monitoring, focusing on its energy efficiency reliability. Each node network consists lamp connected to an electronic dimmable ballast through unit radio module. The is designed using 802.15.4 IEEE protocol it implemented mesh topology at 2.45 GHz. It possible adjust power consumption luminosity each particular point (or street) relative traffic intensity or safety considerations, saving...

The accurate evaluation of electrical parameters like effective channel length and series resistance for 10 to 22nm FinFETs is very complex, although extremely important the correct device modelling. Our paper reviews applies measured various DC methods extraction source/drain resistance. Experimental devices with fin thickness from 10nm 20nm were methodologies explored show consistent values RSD in range 500Ω 300Ω respectively, five parallel fins. All herein discussed applied, however, have...

Abstract This paper presents the complete design of a phase locked loop-based clock synthesizer for reconfigurable analog-to-digital converters. The was implemented in TSMC 65 nm CMOS process technology and presented results were obtained from extracted layout view with parasitics. generates frequencies ranging 40 to 230 MHz considering reference frequency 10 supply voltage 1.2 V. Worst case current consumption is 634 $$\mu $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">...

This work describes the development of an optically controlled reconfigurable E-antenna for cognitive and adaptive radio communications systems at 2.4 5.8 GHz ISM bands. Numerical simulations experiments demonstrate antenna frequency response can be efficiently adapted in optical domain over two different