Wireless sensor networks (WSNs) have been adopted in many fields of application, such as industrial, civil, smart cities, health, and the surveillance domain, to name a few. Fateway nodes conform WSN, each node integrates processor, communication, sensor, power supply modules, sending receiving information covered area across propagation medium. Given increasing complexity WSN system, an effort understand, comprehend analyze entire different metrics are used characterize performance network....

The integration of renewable energies into water systems emerges as a crucial challenge and an opportunity within the water-energy nexus, particularly in isolated communities, emphasizing importance developing sustainable self-sufficient microgrids (IWEMGs). This study addresses significant gap existing research by proposing comprehensive model that simultaneously considers operation dispatch IWEMGs. Our work introduces framework based on game theory to optimize resource management IWEMGs,...

Abstract The Muaco and Taima-Taima sites, in Falcón State of northwestern Venezuela, are among the earliest sites human occupation South America containing artifacts associated with preserved megafaunal remains dating between 19,810 15,780 calybp. Here we report novel visual CT scanning analysis six glyptodont skulls Glyptotherium cf. cylindricum from these which four exhibit distinct similar patterns breakages fronto-parietal region that suggest intentional blows by direct percussion...

Numerous surveys and three excavation surface collection field seasons resulted in the discovery of numerous megafaunal remains that a medium-sized felid new site located on coastal plain Gulf Venezuela, Western Falcón State. The faunal assemblage is represented by South American natives such as megatheres (cf. Eremotherium laurillardi ), an indeterminate mylodontid glyptodont (probably related to Glyptotherium ) Nearctic representatives gomphotheres ( Notiomastodon platensis equids Equus...

Low Power Wide Area Networks (LPWAN) have emerged as an appealing IoT communication solution. Large coverage and low power consumption are critical requirements when deploying a network to support application. Despite the fact that existing LPWAN technology solutions promote such long range, energy efficiency, scalability, cost, there numerous concerns about performance of this type network. With wide range technologies available, is growing interest in their evaluation. This paper proposes...

The design of a new broadband quasi Yagi-Uda antenna is presented. composed an electromagnetic band-gap (EBG)-truncated ground plane and feeding network formed by Marchand balun coupling network. Yagi-antenna was designed to work at central frequency 3.5 GHz using 30-mil FR4 substrate. simulated measured results show relative bandwidth better than 53%, cross polarization lower -19 dB in the main lobe, front-to-back ratio 12 entire bandwidth.

Wireless body area networks have recently gained attention, mainly after the IEEE 802.15.6 standard had been proposed. Reviewing literature, we easily recognize that several authors use different terminologies for a single concept or terminology concepts. This generates confusion and blocks fair comparisons between systems. In this paper, present an overview of Body Area Networks (WBAN) with focus on applications. Moreover, propose detailed taxonomy could help to disambiguate regarding...

Atmospheric Water Generators (AWG) are a promising technology solution to the water scarcity in world. However, their main drawback is high power consumption. This paper presents experimental optimization process of Portable Generator (PAWG) prototype based on thermometric cooler. was developed by an exhaustive search space, which generated parametric sweeps two parameters (i.e., control voltages PAWG), related consumption PAWG and physical variables involved condensation airflow temperature...

The class-E power amplifier is widely used due to its high efficiency, resulting from switching at zero voltage and slope of the switch (i.e. ZVS DZVS). This paper presents an analytical expression gain between DC input peak on ideal (PA) with finite dc-feed inductance, DZVS operation. verified by simulations, it evaluated experimental results a frequency 10.24MHz. Considering (simulated experimental), maximum error was 10,2%.

Dielectric-based measurement techniques have been shown to be very effective in determining the properties of various materials. These widely used a variety fields and applications. Time Domain Transmission (TDT) grown popularity because they are practical, non-destructive, provide measurements real time produce accurate that independent multiple reflections. TDT techniques, on other hand, mostly performed with specialized bulky laboratory equipment, such as Vector Network Analyzer (VNA)...

This paper studies and analyzes the approximation of one-dimensional smooth closed-form functions with compact support using a mixed Fourier series (i.e., combination partial other forms series). To explore potential this approach, we discuss revise its application in signal processing, especially because it allows us to control decreasing rate coefficients avoids Gibbs phenomenon. Therefore, method improves processing performance wide range scenarios, such as function approximation,...

The primary coil of an efficient asymmetric inductive link (IL) has a high quality factor and operates near its self-resonance frequency (SRF). Therefore, characterization is challenging, especially because the measurement instruments must be able to measure large reactance very small resistance at where inductor radiates. In this letter, we present method suitable for characterizing high-Q inductors up SRF. proposed uses sensor characterize under test without galvanic contact. was validated...

In a non-interconnected area, water-energy microgrid with distributed energy (e.g., solar panels, wind turbines, combined heat power, generators, batteries) and water resources desalination plant, atmospheric generator, storage tank) could serve the demand of discrete geographic footprint (i.e., small town). This paper proposes an optimal management model this type microgrids under minimum operation cost goal. The mathematical formulation is presented in detail, which involves constraints...

Recently the non-electromagnetic energy sources and wireless power transfer (WPT) techniques have been used to obtain electromagnetic (EM) for providing autonomy electric devices when in environment is insufficient. Typically, this type of systems are composed by a harvester, DC/RF converter, WPT interface load. Further, stage converter flow processed using amplifier (PA). This paper proposes design methodology generic PA fed limited source. extracts maximum available EPS with efficiency...

Water-energy microgrids are regarded as a viable approach for generating well-being conditions and development in remote areas, such the rancherías of Colombia's La Guajira region. Water energy generation, storage, management systems can be combined to form this microgrids. In sense, work proposes two optimal sizing models, which consider relationship between water (nexus) through storage system with hydropump. The proposed optimization models deterministic stochastic, both stages; first,...

One approach to designing the switched converter control is determine frequency response (i.e., bode diagram) by direct measurement or dedicated simulation. The last option preferred because it reduces development time and cost. Moreover, several circuit simulators (e.g., Ltspice <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">®</sup> ) lack a tool for generating nonlinear plots. To overcome this limitation, paper proposes simulation procedure...

Bicycles are rapidly gaining popularity as a sustainable mode of transportation around the world. Furthermore, smart bicycle paradigm enables increased use through Internet Things applications (e.g., GPS tracking systems). This new introduces energy autonomy challenge. The harvesting technology can capture present in cycling environment kinetic or solar) to give this autonomy. source is more stable and dense environment. There several wheel harvesters on market, ranging from low-complexity...

Wireless communication supports various real-world applications, such as aeronautical navigation, satellite and TV broadcasting, wireless LANs, mobile communications. The inherent characteristics of the electromagnetic spectrum impose constraints on telecommunication channels their frequency bandwidths within networks. A persistent challenge in these applications is providing high-demand services to users, where assignment problems, also known channel assume significance. Researchers have...

This paper proposes new closed expressions of self-impedance using the Method Moments with Point Matching Procedure and piecewise constant linear basis functions in different configurations, which allow saving computing time for solution wire antennas complex geometries. The have complexity O(1) well-defined theoretical bound errors. They were compared an adaptive numerical integration. We obtain accuracy between 7 16 digits depending on chosen function segmentation used. Besides, involved...

This paper presents a methodology for determining the optimal portfolio allocation demand response aggregator. The formulation is based on Day-Ahead electricity prices, in which aggregator coordinates set of residential consumers that are recruited through contracts. Four types contracts analyzed, considering both direct and indirect programs. objective to compare different scenarios contract portfolios order establish benefits each market agent. An optimization problem formulated capture...