An FFT-based measurement technique, which can be easily used to determine accurately the frequency, amplitude, and phase of all harmonic interharmonic components a distorted signal, is examined. Suitable windows interpolation algorithms are examined in order reduce undesirable effects due spectral leakage caused by sampling process that not synchronized. Several results concerning application different on set simulated signals compared verify capability proposed procedure. The influence...

This paper proposes deployment strategies for consumer unmanned aerial vehicles (UAVs) to maximize the stationary coverage of a target area and guarantee continuity service through energy replenishment operations at ground charging stations. The three main contributions our work are as follows. 1) A centralized optimal solution is proposed joint problem UAV positioning ratio scheduling UAVs that involves travel station. 2) distributed game-theory-based strategy using normal-form games with...

This paper proposes a network architecture and supporting optimization framework that allows Unmanned Aerial Vehicles (UAVs) to perform city-scale video monitoring of set Points Interest (PoI). Our approach is systems-driven, relying on experimental studies identify the permissible number hops for multi-UAV relaying in noisy 3-D environment. itself innovative sense it defines mathematical selecting UAVs periodic re-charging by landing public transportation buses, then `riding' bus successive...

Guaranteeing network connectivity in post-disaster scenarios is challenging yet crucial to save human lives and coordinate the operations of first responders. In this paper, we investigate utilization low-altitude aerial mesh networks composed by Small Unmanned Aerial Vehicles (SUAVs) order re-enstablish among isolated end-user (EU) devices located on ground. ad-hoc provide advantage be deployable also critical where terrestrial mobile might not operate, however their implementation from...

The Web of Things (WoT) paradigm was proposed first in the late 2000s, with idea leveraging standards to interconnect all types embedded devices. More than ten years later, fragmentation IoT landscape has dramatically increased as a consequence exponential growth connected devices, making interoperability one key issues for most deployments. Contextually, many studies have demonstrated applicability technologies on scenarios, while joint efforts from academia and industry led proposals...

Background: Microtia is a congenital outer ear deformity that causes the auricle to be absent or underdeveloped. It frequently associated with external auditory canal atresia and hearing psychosocial problems. Objectives: We thoroughly investigate aspects of microtia explore both current innovative therapies. Methods: A systematic literature review was conducted following PRISMA guidelines, focusing on reconstruction methodologies. This utilized three databases: PubMed, Scopus, Web Science....

In the aftermath of a large-scale emergency, Unmanned Aerial Vehicles (UAVs) can play key role as mobile communication systems supporting rescue operations on ground. At same time, deployment autonomous UAV swarms still poses severe challenges in terms distributed mobility, swarm connectivity and mesh networking. To this purpose, we propose ELAPSE (aErial LocAl Positioning System for Emergency), novel, framework aerial that supports discovery multi-hop among personnel emergency requesters....

Warehouse management is a crucial task for most of nowadays' business activities. The usage small Unmanned Aerial Vehicles (UAVs) has been recently proposed to automatize the inventory process while increasing safety human workers. However, practical deployment UAV swarms in target use-case must face many severe technical issues, such as indoor navigation, package identification and limited flight autonomy drones. In this challenging context, paper addresses three novel research...

Time-domain-reflectometry (TDR) measurements, which were originally used to locate and diagnose faults in transmission lines, have been widely applied geology soil science for accurate flexible measurements of moisture water content. Furthermore, the most attractive advantages TDR rely on possible determination spatial location nature various objects, both real time with a nondestructive approach. This makes technique an appealing candidate variety environmental industrial applications....

ABSTRACT The concept of smart city has emerged worldwide as a feasible answer to the challenges raised by increasing urbanisation. From technological point view, guaranteeing ubiquitous connectivity, reliable communications and seamless integration multiple network access technologies are mandatory in city. This is contrast with current infrastructure deployment several urban areas, which characterised lack connectivity coverage fragmentation networks that usually deployed different...

Several recent studies demonstrated that the utilization of Unmanned Aerial Vehicles (UAVs) in combination with Wireless Sensor Networks (WSNs) can enhance system performance terms lifetime and data delivery ratio; at same time, communication among Ground Sensors (WGSs) UAVs poses several technical challenges which are far from being solved. Specifically, this paper, two main issues addressed: (i) how to ensure seamless synchronization ground aerial devices each transit, (ii) compute...

Bluetooth Mesh is a recent SIG standard enabling the deployment of multi-hop Wireless Sensor Networks (WSNs) over Low Energy (BLE) communication links. The introduces many novel and interesting features in Internet Things (IoT) domain, such as seamless integration among sensors mobile wearable devices, support for wide range different IoT application profiles. At same time, fine-grained assessments performance are still needed to understand potential technology. In this paper, we investigate...

A new sine-wave fitting algorithm for A/D converters (ADC's) testing is presented and discussed. The key feature of the possibility using test signals with amplitude greater than full-scale range device under test. technique, combined an improved evaluation conversion noise via weighted mean square error, gives very accurate repeatable estimates number effective bits, which cannot be obtained by traditional methodologies. performance method proved means computer simulations experimental...

The authors deal with an application of the Wigner-Ville distribution (WWD) and usual digital-processing techniques, such as short-time Fourier transform (STFT), used in dedicated instrumentation for measuring non-stationary signals. A WWD- STFT-based virtual instrument (VI) to measure instantaneous frequency amplitude fundamental component transient signals is presented. applied algorithms include original interpolation techniques accurately determining actual frequency, a suitable flat-top...

Time-domain reflectometry (TDR) based on instruments are commonly used for several monitoring methods, particularly in soil moisture and volumetric water-content evaluation. Furthermore, significant advantages of TDR methodology, mostly related to the possible determination real-time a nondestructive approach spatial location nature various objects, make this technique an appealing candidate variety environmental industrial applications. In paper, we show that suitable combination...

Permittivity monitoring for quality control in fluid-related industrial applications requires difficult procedures and the process frequently limits use of traditional sensing technologies. In this paper is reported a combined approach, based on time-domain reflectometry (TDR) frequency-domain analysis, order to appropriately improve measurement frequency-dependent dielectric characteristics over wide range fluid materials, even when lossy liquids are involved. For purpose, we have developed...

During the occurrence of an emergency, being it consequence a natural disaster or human activities, pervasiveness user-owned mobile devices (e.g. smartphones, tablets) turns into precious help to convey data and services all people involved. As result, several emergency-related applications have been proposed on market; however, they are often limited by networking capabilities devices, since based short-range Device-to-Device (D2D) communication technologies Wi-Fi Direct), cellular...

Complex IoT ecosystems often require the usage of Digital Twins (DTs) their physical assets in order to perform predictive analytics and simulate what-if scenarios. DTs are able replicate devices adapt over time behavioral changes. However, typically tailored a specific use case, without possibility seamlessly different Further, fragmentation poses additional challenges on how deploy heterogeneous scenarios characterized by multiple data formats network protocols. In this paper, we propose...

This paper deals with an application of the Wigner-Ville distribution (WVD) and usual digital-processing techniques, such as short-time Fourier transform (STFT), used in dedicated instrumentation for measuring nonstationary signals. The processed real signals are made analytic by means Hilbert transformations; then suitable implementations windowed STFT pseudo (PWVD) time domain have been performed. Particularly, fast Hartley (FHT) is to evaluate PWVD domain. Furthermore, use efficient...