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Signals, Volume 3, Issue 2

June 2022 - 15 articles

Cover Story: We propose an ensemble of convolutional neural networks and transformers to solve the semantic segmentation task. Diversity among models of the ensemble is enforced by adopting different loss functions and testing different data augmentations. The developed solution is assessed through an extensive empirical evaluation in five different scenarios: polyp detection, skin detection, leukocytes recognition, environmental microorganism detection, and butterfly recognition. The final model provides state-of-the-art results. View this paper
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Articles (15)

  • Article
  • Open Access
6 Citations
3,187 Views
18 Pages

20 June 2022

The nematode worm Caenorhabditis elegans has a relatively simple neural system for analysis of information transmission from sensory organ to muscle fiber. Consequently, this study includes an example of a neural circuit from the nematode worm, and a...

  • Article
  • Open Access
3 Citations
3,022 Views
14 Pages

Manual 3D Control of an Assistive Robotic Manipulator Using Alpha Rhythms and an Auditory Menu: A Proof-of-Concept

  • Ana S. Santos Cardoso,
  • Rasmus L. Kæseler,
  • Mads Jochumsen and
  • Lotte N. S. Andreasen Struijk

16 June 2022

Brain–Computer Interfaces (BCIs) have been regarded as potential tools for individuals with severe motor disabilities, such as those with amyotrophic lateral sclerosis, that render interfaces that rely on movement unusable. This study aims to d...

  • Review
  • Open Access
54 Citations
13,401 Views
37 Pages

A Survey on MIMO-OFDM Systems: Review of Recent Trends

  • Houda Harkat,
  • Paulo Monteiro,
  • Atilio Gameiro,
  • Fernando Guiomar and
  • Hasmath Farhana Thariq Ahmed

2 June 2022

MIMO-OFDM is a key technology and a strong candidate for 5G telecommunication systems. In the literature, there is no convenient survey study that rounds up all the necessary points to be investigated concerning such systems. The current deeper revie...

  • Article
  • Open Access
20 Citations
4,308 Views
18 Pages

An Empirical Study on Ensemble of Segmentation Approaches

  • Loris Nanni,
  • Alessandra Lumini,
  • Andrea Loreggia,
  • Alberto Formaggio and
  • Daniela Cuza

1 June 2022

Recognizing objects in images requires complex skills that involve knowledge about the context and the ability to identify the borders of the objects. In computer vision, this task is called semantic segmentation and it pertains to the classification...

  • Article
  • Open Access
7 Citations
4,447 Views
15 Pages

Antenna Boosters versus Flexible Printed Circuit Antennas for IoT Devices

  • Jaume Anguera,
  • Alejandro Fernández,
  • Carles Puente,
  • Aurora Andújar and
  • Jaap Groot

23 May 2022

Antennas should be small enough to fit in the limited space of IoT devices and, at the same time, with multi-band operation across several bands as well as ensure stability when embedded in a device. In this regard, two different technologies are com...

  • Article
  • Open Access
4 Citations
6,176 Views
13 Pages

20 May 2022

This paper presents a Python-based simulation technique that can be used to predict the behavior of switch-mode non-isolated (SMNI) DC-DC converters operating in closed loop. The proposed technique can be implemented in an open-source numerical compu...

  • Article
  • Open Access
9 Citations
3,192 Views
17 Pages

COVID-19 Detection from Radiographs: Is Deep Learning Able to Handle the Crisis?

  • Muhammad Saqib,
  • Abbas Anwar,
  • Saeed Anwar,
  • Lars Petersson,
  • Nabin Sharma and
  • Michael Blumenstein

11 May 2022

Deep learning in the last decade has been very successful in computer vision and machine learning applications. Deep learning networks provide state-of-the-art performance in almost all of the applications where they have been employed. In this revie...

  • Article
  • Open Access
21 Citations
4,239 Views
12 Pages

5 May 2022

Detecting pulmonary nodules early significantly contributes to the treatment success of lung cancer. Several deep learning models for medical image analysis have been developed to help classify pulmonary nodules. The design of convolutional neural ne...

  • Article
  • Open Access
31 Citations
6,843 Views
18 Pages

2 May 2022

Millimeter-wave radar has demonstrated its high efficiency in complex environments in recent years, which outperforms LiDAR and computer vision in human activity recognition in the presence of smoke, fog, and dust. In previous studies, researchers mo...

  • Article
  • Open Access
8 Citations
5,746 Views
17 Pages

Personalized PPG Normalization Based on Subject Heartbeat in Resting State Condition

  • Francesca Gasparini,
  • Alessandra Grossi,
  • Marta Giltri and
  • Stefania Bandini

18 April 2022

Physiological responses are currently widely used to recognize the affective state of subjects in real-life scenarios. However, these data are intrinsically subject-dependent, making machine learning techniques for data classification not easily appl...

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Signals - ISSN 2624-6120