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15,667 Results Found

  • Review
  • Open Access
46 Citations
11,243 Views
47 Pages

28 January 2023

In recent years, tremendous advances have been made in the design and applications of wireless networks and embedded sensors. The combination of sophisticated sensors with wireless communication has introduced new applications, which can simplify hum...

  • Article
  • Open Access
4 Citations
3,400 Views
13 Pages

Estimation of Acoustic Source Positioning Error Determined by One-Dimensional Linear Location Technique

  • Artem Marchenkov,
  • Igor Vasiliev,
  • Dmitriy Chernov,
  • Daria Zhgut,
  • Daria Moskovskaya,
  • Ivan Mishchenko and
  • Ekaterina Kulikova

27 December 2021

The one-dimensional (1D) linear location technique has been considered as one of the methods for determining the position of acoustic emission (AE) sources in metallic objects. However, this approach does not take into account the heterogeneity of ma...

  • Review
  • Open Access
3 Citations
6,977 Views
41 Pages

GNSS for High-Precision and Reliable Positioning: A Review of Correction Techniques and System Architectures

  • Anna Sukhenko,
  • Nursultan Meirambekuly,
  • Arman Syzdykov,
  • Adil Mukhamedgali and
  • Yenglik Mellatova

20 November 2025

This paper provides a comprehensive review of the existing approaches to ensuring high-precision and reliable GNSS positioning. The purpose of this review is to examine modern approaches to mitigating the main factors affecting GNSS receiver accuracy...

  • Article
  • Open Access
8 Citations
2,793 Views
13 Pages

Selective Axillary Dissection after Neoadjuvant Chemotherapy in Patients with Lymph-Node-Positive Breast Cancer (CLYP Study): The Radio-Guided Occult Lesion Localization Technique for Biopsy-Proven Metastatic Lymph Nodes

  • Rossella Rella,
  • Marco Conti,
  • Enida Bufi,
  • Charlotte Marguerite Lucille Trombadori,
  • Alba Di Leone,
  • Daniela Terribile,
  • Riccardo Masetti,
  • Luca Zagaria,
  • Antonino Mulè and
  • Paolo Belli
  • + 2 authors

29 March 2023

(1) Background: To help to refine the accuracy of sentinel lymph node biopsy (SLNB) in breast cancer (BC) patients with biopsy-proven nodal disease prior to neoadjuvant chemotherapy (NACT), a method of marking the biopsy-proven positive LN at diagnos...

  • Article
  • Open Access
10 Citations
4,080 Views
36 Pages

Manufacturers increasingly turn to robotic gripper designs to improve the efficiency of gripping and moving objects and provide greater flexibility to these objects. Neuro-fuzzy techniques are the most widespread in developing gripper designs. In thi...

  • Systematic Review
  • Open Access
144 Citations
16,145 Views
39 Pages

Collaborative Indoor Positioning Systems: A Systematic Review

  • Pavel Pascacio,
  • Sven Casteleyn,
  • Joaquín Torres-Sospedra,
  • Elena Simona Lohan and
  • Jari Nurmi

2 February 2021

Research and development in Collaborative Indoor Positioning Systems (CIPSs) is growing steadily due to their potential to improve on the performance of their non-collaborative counterparts. In contrast to the outdoors scenario, where Global Navigati...

  • Review
  • Open Access
116 Citations
24,151 Views
25 Pages

Positioning in 5G and 6G Networks—A Survey

  • Ferenc Mogyorósi,
  • Péter Revisnyei,
  • Azra Pašić,
  • Zsófia Papp,
  • István Törös,
  • Pál Varga and
  • Alija Pašić

23 June 2022

Determining the position of ourselves or our assets has always been important to humans. Technology has helped us, from sextants to outdoor global positioning systems, but real-time indoor positioning has been a challenge. Among the various solutions...

  • Article
  • Open Access
12 Citations
2,658 Views
20 Pages

In this paper, a variable gain prescribed performance control law is proposed for dynamic positioning (DP) of ships with positioning error constraints, input saturation and unknown external disturbances. The error performance index functions are desi...

  • Article
  • Open Access
8 Citations
8,713 Views
18 Pages

Modeling the Behavior of an Underwater Acoustic Relative Positioning System Based on Complementary Set of Sequences

  • Joaquín Aparicio,
  • Ana Jiménez,
  • Fernando J. Álvarez,
  • Jesús Ureña,
  • Carlos De Marziani and
  • Cristina Diego

28 November 2011

The great variability usually found in underwater media makes modeling a challenging task, but helpful for better understanding or predicting the performance of future deployed systems. In this work, an underwater acoustic propagation model is presen...

  • Article
  • Open Access
88 Citations
7,291 Views
18 Pages

Dynamic Selection Techniques for Detecting GPS Spoofing Attacks on UAVs

  • Tala Talaei Khoei,
  • Shereen Ismail and
  • Naima Kaabouch

15 January 2022

Unmanned aerial vehicles are prone to several cyber-attacks, including Global Positioning System spoofing. Several techniques have been proposed for detecting such attacks. However, the recurrence and frequent Global Positioning System spoofing incid...

  • Communication
  • Open Access
3 Citations
2,746 Views
13 Pages

Radar Position Estimation by Sequential Irradiation of ESM Receivers

  • Petr Hubáček,
  • Jiří Veselý and
  • Jana Olivová

28 June 2021

In this article, a new technique for determination of 2D signal source (target) position is proposed. This novel approach, called the Inscribed Angle (InA), is based on measuring the time difference of sequential irradiation by the main beam of the t...

  • Article
  • Open Access
2,696 Views
24 Pages

Multi-Control Strategies on a Cubic–Quintic Nonlinear Hybrid Oscillator with External Excitation Under Resonance Conditions

  • Asma Alanazy,
  • Yasser A. Amer,
  • Ashraf Taha EL-Sayed,
  • Fatma Sh. Mohammed and
  • Taher A. Bahnasy

13 March 2025

The goal of this article is to reduce the vibration of a hybrid oscillator with a cubic–quintic nonlinear term under internal and external forces in the worst resonance case. To eliminate the harmful vibration in the system, the following strat...

  • Article
  • Open Access
8 Citations
10,902 Views
28 Pages

26 August 2020

Most climate change messages depict a picture of the devastating effects that anthropogenic activities have on the environment, expecting to mobilise human action. Built on the daunting scientific evidence, these gloomy messages can potentially emoti...

  • Article
  • Open Access
30 Citations
5,057 Views
25 Pages

14 November 2017

In this paper, a backstepping-based formation control of quadrotors with the state transformation technique is proposed. First, the dynamics of a quadrotor is derived by using the Newton–Euler formulation. Next, a backstepping-based formation control...

  • Article
  • Open Access
38 Citations
2,947 Views
13 Pages

27 February 2020

In this paper, using the Avery–Henderson fixed point theorem and the monotone iterative technique, we investigate the existence of positive solutions for a class of p-Laplacian Hadamard fractional-order three-point boundary value problems.

  • Article
  • Open Access
1 Citations
2,101 Views
15 Pages

Non-Invasive 3D Breast Tumor Localization: A Viable Alternative to Invasive Tumor Marking

  • Dragana Bjelica,
  • Natasa Colakovic,
  • Svetlana Opric,
  • Darko Zdravkovic,
  • Barbara Loboda,
  • Simona Petricevic,
  • Milan Gojgic,
  • Ognjen Zecic,
  • Zlatko Skuric and
  • Nebojsa Ivanovic
  • + 1 author

17 July 2024

Background: We present a detailed description and the preliminary results of our original technique for non-invasive three-dimensional tumor localization in the breast, which was created as an alternative to standard invasive tumor marking before neo...

  • Feature Paper
  • Article
  • Open Access
4 Citations
1,165 Views
16 Pages

Pairs of Positive Solutions for a Carrier p(x)-Laplacian Type Equation

  • Pasquale Candito,
  • Giuseppe Failla and
  • Roberto Livrea

6 August 2024

The existence of multiple pairs of smooth positive solutions for a Carrier problem, driven by a p(x)-Laplacian operator, is studied. The approach adopted combines sub-super solutions, truncation, and variational techniques. In particular, after an ex...

  • Article
  • Open Access
8 Citations
4,735 Views
24 Pages

Simulation Tool and Online Demonstrator for CDMA-Based Ultrasonic Indoor Localization Systems

  • María Carmen Pérez-Rubio,
  • Álvaro Hernández,
  • David Gualda-Gómez,
  • Santiago Murano,
  • Jorge Vicente-Ranera,
  • Francisco Ciudad-Fernández,
  • José Manuel Villadangos and
  • Rubén Nieto

28 January 2022

This work presents the CODEUS platform, which includes a simulation tool together with an online experimental demonstrator to offer analysis and testing flexibility for researchers and developers in Ultrasonic Indoor Positioning Systems (UIPSs). The...

  • Article
  • Open Access
6 Citations
2,800 Views
17 Pages

30 June 2020

A chatter vibration in milling process results in poor surface finish and machining efficiency. To avoid the chatter vibration, the stability lobe diagram (SLD) which is the function of tool point frequency response functions (FRFs) is adopted to pre...

  • Article
  • Open Access
5 Citations
3,248 Views
18 Pages

Foot Position Measurement during Assistive Motion for Sit-to-Stand Using a Single Inertial Sensor and Shoe-Type Force Sensors

  • Kodai Kitagawa,
  • Ibai Gorordo Fernandez,
  • Takayuki Nagasaki,
  • Sota Nakano,
  • Mitsumasa Hida,
  • Shogo Okamatsu and
  • Chikamune Wada

Assistive motion for sit-to-stand causes lower back pain (LBP) among caregivers. Considering previous studies that showed that foot position adjustment could reduce lumbar load during assistive motion for sit-to-stand, quantitative monitoring of and...

  • Article
  • Open Access
2 Citations
663 Views
17 Pages

12 July 2025

Unknown time-varying parameters, along with mismatched and matched disturbances, exist in hydraulic systems, worsening position tracking performance and even destabilizing systems. To address this issue, this article proposes an adaptive full-state p...

  • Review
  • Open Access
6 Citations
2,782 Views
34 Pages

26 February 2025

Breast cancer poses a significant global health challenge and includes various subtypes, such as endocrine-positive, HER2-positive, and triple-negative. Endocrine-positive breast cancer, characterized by estrogen and progesterone receptors, is common...

  • Article
  • Open Access
2 Citations
1,804 Views
15 Pages

Convexity, Starlikeness, and Prestarlikeness of Wright Functions

  • Dong Liu,
  • Muhey U Din,
  • Mohsan Raza,
  • Sarfraz Nawaz Malik and
  • Huo Tang

18 October 2022

This article deals with the normalized Wright function and its geometric properties. In particular, we find sufficiency criteria for close-to-convexity with respect to starlike function ς1ς2. We also find conditions such that the...

  • Article
  • Open Access
38 Citations
8,680 Views
21 Pages

Fuzzy Gain-Scheduling PID for UAV Position and Altitude Controllers

  • Aurelio G. Melo,
  • Fabio A. A. Andrade,
  • Ihannah P. Guedes,
  • Guilherme F. Carvalho,
  • Alessandro R. L. Zachi and
  • Milena F. Pinto

10 March 2022

Unmanned aerial vehicle (UAV) applications have evolved to a wide range of fields in the last decade. One of the main challenges in autonomous tasks is the UAV stability during maneuvers. Thus, attitude and position control play a crucial role in sta...

  • Proceeding Paper
  • Open Access
763 Views
9 Pages

Proposal for an Enhanced Monitoring Technique for Active Control of Aircraft Flap Asymmetry

  • Leonardo Baldo,
  • Matteo Davide Lorenzo Dalla Vedova and
  • Jose Maria Cejudo Ruiz

This paper presents an innovative active monitoring strategy to manage asymmetry in aircraft flaps. Complex mechanical systems like high-lift devices may undergo a wide range of faults, such as a broken transmission torsion bar or wear and tear on co...

  • Review
  • Open Access
3,225 Views
16 Pages

Background: Positive identification is at the forefront of tasks for forensic practitioners when a set of remains is discovered. Standard means of identification include fingerprints, dental, and DNA analyses; however, additional methods are utilized...

  • Article
  • Open Access
3 Citations
3,647 Views
19 Pages

15 September 2022

The demographic growth that we have witnessed in recent years, which is expected to increase in the years to come, raises emerging challenges worldwide regarding urban mobility, both in transport and pedestrian movement. The sustainable development o...

  • Review
  • Open Access
24 Citations
10,085 Views
35 Pages

8 September 2020

Indoor positioning poses a number of challenges, especially in large and complex buildings. Several effects, such as signal attenuation, signal fluctuations, interference, and multipath play a decisive role in signal propagation. The severity of each...

  • Article
  • Open Access
101 Citations
13,852 Views
19 Pages

1 February 2018

Airborne LiDAR technology is widely used in archaeology and over the past decade has emerged as an accurate tool to describe anthropomorphic landforms. Archaeological features are traditionally emphasised on a LiDAR-derived Digital Terrain Model (DTM...

  • Article
  • Open Access
5 Citations
6,870 Views
12 Pages

Faults in distribution overhead lines occur due to various reasons, such as rain, strong winds, lightning, and other natural causes. The protection from the load side broken conductor (LSBC) faults has been one of the biggest challenges in the power...

  • Review
  • Open Access
96 Citations
11,692 Views
35 Pages

A Review of Technologies and Techniques for Indoor Navigation Systems for the Visually Impaired

  • Walter C. S. S. Simões,
  • Guido S. Machado,
  • André M. A. Sales,
  • Mateus M. de Lucena,
  • Nasser Jazdi and
  • Vicente F. de Lucena

15 July 2020

Technologies and techniques of location and navigation are advancing, allowing greater precision in locating people in complex and challenging conditions. These advances have attracted growing interest from the scientific community in using indoor po...

  • Article
  • Open Access
11 Citations
8,501 Views
12 Pages

A Sub-Threshold Differential CMOS Schmitt Trigger with Adjustable Hysteresis Based on Body Bias Technique

  • Sara Radfar,
  • Ali Nejati,
  • Yasin Bastan,
  • Parviz Amiri,
  • Mohammad Hossein Maghami,
  • Mehdi Nasrollahpour and
  • Sotoudeh Hamedi-Hagh

This paper presents a sub-threshold differential CMOS Schmitt trigger with tunable hysteresis, which can be used to enhance the noise immunity of low-power electronic systems. By exploiting the body bias technique to the positive feedback transistors...

  • Article
  • Open Access
39 Citations
7,673 Views
28 Pages

1 September 2020

In the past decade, Light Detection and Ranging (lidar) has fundamentally changed our ability to remotely detect archaeological features and deepen our understanding of past human-environment interactions, settlement systems, agricultural practices,...

  • Article
  • Open Access
12 Citations
7,433 Views
17 Pages

24 December 2024

Unmanned aerial vehicles (UAVs) are vulnerable to global positioning system (GPS) spoofing attacks, which can mislead their navigation systems and result in unpredictable catastrophic consequences. To address this issue, we propose a detection method...

  • Review
  • Open Access
6 Citations
5,692 Views
33 Pages

Survey of Collision Avoidance Systems for Underground Mines: Sensing Protocols

  • Meilin Qian,
  • Kai Zhao,
  • Binghao Li,
  • Henry Gong and
  • Aruna Seneviratne

28 September 2022

With the growing number of unintentional interactions occurring in underground mines, Collision Avoidance System (CAS) establishment and maintenance has become an urgent need for mining industries to enhance their risk profile and improve constructio...

  • Systematic Review
  • Open Access
2 Citations
5,232 Views
15 Pages

Systematic Review and Meta-Analysis of the Application of T-PEP in the Therapeutic Management of COPD Patients

  • Arianna Sepiacci,
  • Nadia Starc,
  • Rossella Laitano,
  • Franco Pasqua,
  • Paola Rogliani and
  • Josuel Ora

7 January 2025

Background: Chronic obstructive pulmonary disease (COPD) is a leading cause of morbidity and mortality worldwide, characterized by chronic mucus hypersecretion (CMH) that exacerbates airway obstruction and accelerates disease progression. Effective a...

  • Review
  • Open Access
1 Citations
1,767 Views
29 Pages

Patient Positioning and Treatment Techniques in Total Skin Irradiation: A Scoping Review

  • Andrea Lastrucci,
  • Emanuele Canzani,
  • Neda Haghighatjou,
  • Livia Marrazzo,
  • Nicola Iosca,
  • Yannick Wandael,
  • Daniele Giansanti,
  • Renzo Ricci,
  • Monica Mangoni and
  • Lorenzo Livi
  • + 2 authors

9 April 2025

Introduction: Total skin irradiation (TSI) is a radiotherapy technique used to treat cutaneous lymphomas, such as mycosis fungoides. A key aspect of the success of the treatment is the correct positioning of the patient, which ensures a homogeneous d...

  • Article
  • Open Access
2 Citations
2,189 Views
19 Pages

15 August 2024

The goal of this study is to determine the feasibility of a wearable multi-sensor positioning prototype to be used as a training tool to evaluate rowing technique and to determine the positioning accuracy using multiple mathematical models and estima...

  • Article
  • Open Access
3 Citations
3,011 Views
13 Pages

Study on the Effect of Gaze Position and Image Brightness on Peripheral Dimming Technique

  • Jeong-Sik Kim,
  • Won-Been Jeong,
  • Byeong Hun An and
  • Seung-Woo Lee

Here, we study a low-power technique for displays based on gaze tracking, called peripheral dimming. In this work, the threshold levels of the lightness reduction ratio (LRR), where people notice differences in brightness, depending on gaze positions...

  • Review
  • Open Access
6 Citations
6,047 Views
23 Pages

2 April 2022

Accurate real-time rotor position is indispensable for switched reluctance motors (SRM) speed and torque control. Traditional position sensors add complexity and potential failure risk to the system. Owing to the added advantages of high stability an...

  • Article
  • Open Access
19 Citations
5,369 Views
8 Pages

Is Supine Position Superior to Prone Position in the Surgical Pinning of Supracondylar Humerus Fracture in Children?

  • Vito Pavone,
  • Andrea Vescio,
  • Maria Riccioli,
  • Annalisa Culmone,
  • Pierluigi Cosentino,
  • Marco Caponnetto,
  • Sara Dimartino and
  • Gianluca Testa

Background: Supracondylar humerus fracture (SCHF) is a frequent injury in pediatric ages. Closed reduction and percutaneous pin fixation is a common treatment of displaced SCHF. Surgery is usually performed in the supine position; otherwise the prone...

  • Article
  • Open Access
3 Citations
3,201 Views
18 Pages

30 August 2020

The ultra-wide band (UWB) technology has many advantages in positioning and measuring systems; however, powers of UWB signals rapidly reduce while traveling in propagation environments, hence detecting UWB signals are difficult. Various modulation te...

  • Article
  • Open Access
11 Citations
6,353 Views
28 Pages

Various operations at sea, such as maintaining a constant ship position and direction, require a complex control system. Under such conditions, the ship needs an efficient positioning technique. Dynamic positioning (DP) systems provide such an applic...

  • Article
  • Open Access
35 Citations
5,065 Views
26 Pages

21 January 2021

Indoor positioning has become a very promising research topic due to the growing demand for accurate node location information for indoor environments. Nonetheless, current positioning algorithms typically present the issue of inaccurate positioning...

  • Article
  • Open Access
22 Citations
4,705 Views
20 Pages

18 March 2020

In recent years, wireless-based fingerprint positioning has attracted increasing research attention owing to its position-related features and applications in the Internet of Things (IoT). In this paper, by leveraging long-term evolution (LTE) signal...

  • Article
  • Open Access
3 Citations
2,771 Views
24 Pages

A Quadrifocal Tensor SFM Photogrammetry Positioning and Calibration Technique for HOFS Aerial Sensors

  • Tao Wang,
  • Yan Zhang,
  • Yongsheng Zhang,
  • Ying Yu,
  • Lei Li,
  • Shaocong Liu,
  • Xiang Zhao,
  • Zhenchao Zhang and
  • Longhui Wang

22 July 2022

Nowadays, the integration between photogrammetry and structure from motion (SFM) has become much closer, and many attempts have been made to combine the two approaches to realize the positioning, calibration, and 3D reconstruction of a large number o...

  • Proceeding Paper
  • Open Access
1 Citations
2,719 Views
6 Pages

14 November 2016

In wireless sensor networks (WSN) localization of the nodes is relevant, especially for the task of identification of events that occur in the environment being monitored. Thus, positioning of the sensors is essential to satisfy such task. In WSN, se...

  • Review
  • Open Access
244 Citations
17,781 Views
27 Pages

31 January 2017

Future driver assistance systems will rely on accurate, reliable and continuous knowledge on the position of other road participants, including pedestrians, bicycles and other vehicles. The usual approach to tackle this requirement is to use on-board...

  • Article
  • Open Access
29 Citations
4,615 Views
17 Pages

Optimization of Time Synchronization and Algorithms with TDOA Based Indoor Positioning Technique for Internet of Things

  • Kun Zhao,
  • Tiantian Zhao,
  • Zhengqi Zheng,
  • Chao Yu,
  • Difeng Ma,
  • Khaled Rabie and
  • Rupak Kharel

14 November 2020

To provide high-precision positioning for Internet of Things (IoT) scenarios, we optimize the indoor positioning technique based on Ultra-Wideband (UWB) Time Difference of Arrival (TDOA) equipment. This paper analyzes sources of positioning error and...

  • Article
  • Open Access
3 Citations
1,483 Views
14 Pages

Position Feedback-Control of an Electrothermal Microactuator Using Resistivity Self-Sensing Technique

  • Alongkorn Pimpin,
  • Werayut Srituravanich,
  • Gridsada Phanomchoeng and
  • Nattapol Damrongplasit

23 May 2024

The self-sensing technology of microactuators utilizes a smart material to concurrently actuate and sense in a closed-loop control system. This work aimed to develop a position feedback-control system of nickel electrothermal microactuators using a r...

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