Skip Content
You are currently on the new version of our website. Access the old version .

Signals, Volume 6, Issue 3

2025 September - 20 articles

Cover Story: This study introduces a novel non-invasive framework for assessing the quality of four bioactive oils (olive oil, sunflower oil, tomato seed oil, and pumpkin seed oil) through infrared thermography and deep learning. The customized electronic system designed acquires thermographic signals under controlled temperature and humidity conditions. The acquisition system was used to extract thermal data. A hybrid deep learning model that integrates Convolutional Neural Networks (CNNs) with Long Short-Term Memory (LSTM) was built to classify the oils based on their stability, thermal reactivity, and potential health benefits. Signal analysis has shown that the AI-based method achieves an F1-score of 93.66%, providing a non-invasive and intelligent framework for the validation and traceability of nutritional compounds. View this paper
  • Issues are regarded as officially published after their release is announced to the table of contents alert mailing list .
  • You may sign up for email alerts to receive table of contents of newly released issues.
  • PDF is the official format for papers published in both, html and pdf forms. To view the papers in pdf format, click on the "PDF Full-text" link, and use the free Adobe Reader to open them.

Articles (20)

  • Article
  • Open Access
2,357 Views
25 Pages

Intelligent Face Recognition: Comprehensive Feature Extraction Methods for Holistic Face Analysis and Modalities

  • Thoalfeqar G. Jarullah,
  • Ahmad Saeed Mohammad,
  • Musab T. S. Al-Kaltakchi and
  • Jabir Alshehabi Al-Ani

19 September 2025

Face recognition technology utilizes unique facial features to analyze and compare individuals for identification and verification purposes. This technology is crucial for several reasons, such as improving security and authentication, effectively ve...

  • Review
  • Open Access
2,748 Views
15 Pages

11 September 2025

Stroke remains one of the leading causes of disability worldwide, often resulting in persistent impairments in gait and balance. Traditional rehabilitation methods—though beneficial—are limited by factors such as therapist dependency, low...

  • Article
  • Open Access
2 Citations
1,844 Views
32 Pages

Deep Learning for Wildlife Monitoring: Near-Infrared Bat Detection Using YOLO Frameworks

  • José-Joel González-Barbosa,
  • Israel Cruz Rangel,
  • Alfonso Ramírez-Pedraza,
  • Raymundo Ramírez-Pedraza,
  • Isabel Bárcenas-Reyes,
  • Erick-Alejandro González-Barbosa and
  • Miguel Razo-Razo

4 September 2025

Bats are ecologically vital mammals, serving as pollinators, seed dispersers, and bioindicators of ecosystem health. Many species inhabit natural caves, which offer optimal conditions for survival but present challenges for direct ecological monitori...

  • Article
  • Open Access
1 Citations
3,111 Views
18 Pages

EMG-Based Recognition of Lower Limb Movements in Athletes: A Comparative Study of Classification Techniques

  • Kudratjon Zohirov,
  • Sarvar Makhmudjanov,
  • Feruz Ruziboev,
  • Golib Berdiev,
  • Mirjakhon Temirov,
  • Gulrukh Sherboboyeva,
  • Firuza Achilova,
  • Gulmira Pardayeva and
  • Sardor Boykobilov

2 September 2025

In this article, the classification of signals arising from the movements of the lower limb of the leg (LLL) based on electromyography (EMG) (walking, sitting, up and down the stairs) was carried out. In the data collection process, 25 athletes aged...

  • Article
  • Open Access
2 Citations
1,406 Views
21 Pages

2 September 2025

Distributed target tracking in multi-agent networks plays a critical role in cooperative sensing and autonomous navigation. However, it faces significant challenges in highly dynamic and adversarial setups. This study aims to enhance the resilience o...

  • Article
  • Open Access
1 Citations
1,049 Views
17 Pages

21 August 2025

Electroencephalogram (EEG)-based identification offers a promising biometric solution by leveraging the uniqueness of individual brain activity patterns. This study proposes a framework based on a convolutional autoencoder (CAE) along with a traditio...

  • Article
  • Open Access
1 Citations
2,184 Views
15 Pages

Decision Tree and ANOVA as Feature Selection from Vibration Signals to Improve the Diagnosis of Belt Conveyor Idlers

  • João L. L. Soares,
  • Thiago B. Costa,
  • Geovane S. do Nascimento,
  • Walter S. Sousa,
  • Jullyane M. S. de Figueiredo,
  • Danilo S. Braga,
  • André L. A. Mesquita and
  • Alexandre L. A. Mesquita

13 August 2025

This study aims to compare decision tree and Analysis of Variance (ANOVA) techniques as feature selection methods, combined with Wavelet Packet Decomposition (WPD) for feature extraction, to enhance the diagnosis of faults in belt conveyor idlers. Be...

  • Article
  • Open Access
2,881 Views
16 Pages

Rocket Launch Detection with Smartphone Audio and Transfer Learning

  • Sarah K. Popenhagen,
  • Samuel Kei Takazawa and
  • Milton A. Garcés

11 August 2025

Rocket launches generate infrasound signatures that have been detected at great distances. Due to the sparsity of the networks that have made these detections, however, most signals are detected tens of minutes to hours after the rocket launch. In th...

  • Article
  • Open Access
3 Citations
3,865 Views
17 Pages

8 August 2025

Accurate teeth segmentation and orientation are fundamental in modern oral healthcare, enabling precise diagnosis, treatment planning, and dental implant design. In this study, we present a comprehensive approach to teeth segmentation and orientation...

  • Article
  • Open Access
1 Citations
3,196 Views
19 Pages

Method for Target Detection in a High Noise Environment Through Frequency Analysis Using an Event-Based Vision Sensor

  • Will Johnston,
  • Shannon Young,
  • David Howe,
  • Rachel Oliver,
  • Zachry Theis,
  • Brian McReynolds and
  • Michael Dexter

5 August 2025

Event-based vision sensors (EVSs), often referred to as neuromorphic cameras, operate by responding to changes in brightness on a pixel-by-pixel basis. In contrast, traditional framing cameras employ some fixed sampling interval where integrated inte...

  • Article
  • Open Access
13 Citations
2,075 Views
19 Pages

1 August 2025

Nutrition plays a fundamental role in promoting health and preventing chronic diseases, with bioactive food components offering a therapeutic potential in biomedical applications. Among these, edible oils are recognised for their functional propertie...

  • Article
  • Open Access
668 Views
18 Pages

Distributed Diffusion Multi-Distribution Filter with IMM for Heavy-Tailed Noise

  • Guannan Chang,
  • Changwu Jiang,
  • Wenxing Fu,
  • Tao Cui and
  • Peng Dong

1 August 2025

With the diversification of space applications, the tracking of maneuvering targets has gradually gained attention. Issues such as their wide range of movement and observation outliers caused by human operation are worthy of in-depth discussion. This...

  • Article
  • Open Access
3 Citations
2,524 Views
23 Pages

30 July 2025

Accurate peak detection in the frequency domain is fundamental to reliable range estimation in Frequency-Modulated Continuous-Wave (FMCW) radar systems, particularly in challenging conditions characterized by a low signal-to-noise ratio (SNR) and pha...

  • Article
  • Open Access
2,489 Views
39 Pages

Micro-Doppler Signal Features of Idling Vehicle Vibrations: Dependence on Gear Engagements and Occupancy

  • Ram M. Narayanan,
  • Benjamin D. Simone,
  • Daniel K. Watson,
  • Karl M. Reichard and
  • Kyle A. Gallagher

24 July 2025

This study investigates the use of a custom-built 10 GHz continuous wave micro-Doppler radar system to analyze external vibrations of idling vehicles under various conditions. Scenarios included different gear engagements with one occupant and parked...

  • Article
  • Open Access
2 Citations
1,974 Views
20 Pages

21 July 2025

Analyzing and measuring the similarity between two signals is a common task in many vibration-based structural health monitoring applications. Coherence between input and response signals serves as a convenient indicator of damage, based on the premi...

  • Article
  • Open Access
2,151 Views
12 Pages

Performance of G3-PLC Channel in the Presence of Spread Spectrum Modulated Electromagnetic Interference

  • Waseem ElSayed,
  • Amr Madi,
  • Piotr Lezynski,
  • Robert Smolenski and
  • Paolo Crovetti

17 July 2025

Power converters in the smart grid systems are essential to link renewable energy sources with all grid appliances and equipment. However, this raises the possibility of electromagnetic interference (EMI) between the smart grid elements. Hence, sprea...

  • Article
  • Open Access
2,501 Views
14 Pages

Power–Cadence Relationships in Cycling: Building Models from a Limited Number of Data Points

  • David M. Rouffet,
  • Briar L. Rudsits,
  • Michael W. Daniels,
  • Temi Ariyo and
  • Christophe A. Hautier

10 July 2025

Accurate modeling of the power–cadence relationship is essential for assessing maximal anaerobic power (Pmax) of the lower limbs. Experimental data points from Force–Velocity tests during cycling do not always reflect the maximal and cade...

  • Article
  • Open Access
5,114 Views
25 Pages

A Framework for Bluetooth-Based Real-Time Audio Data Acquisition in Mobile Robotics

  • Sandeep Gupta,
  • Udit Mamodiya,
  • A. K. M. Zakir Hossain and
  • Ahmed J. A. Al-Gburi

This paper presents a novel framework addressing the fundamental challenge of concurrent real-time audio acquisition and motor control in resource-constrained mobile robotics. The ESP32-based system integrates a digital MEMS microphone with rover mob...

  • Article
  • Open Access
929 Views
14 Pages

24 June 2025

Instrument recognition is a crucial aspect of music information retrieval, and in recent years, machine learning-based methods have become the primary approach to addressing this challenge. However, existing models often struggle to accurately identi...

Get Alerted

Add your email address to receive forthcoming issues of this journal.

XFacebookLinkedIn
Signals - ISSN 2624-6120