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Signals, Volume 4, Issue 3

September 2023 - 10 articles

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Cover Story: In the field of biology, the classification of planktic foraminifera is an important task used to determine the quality of the environment that they are extracted from. For a long time, biologists have classified these organisms via direct observation under the microscope, but lately, AI has started to show promising results in automating this process. Deep learning has quickly become a booming research field with applications in a wide variety of computational tasks, and with our latest development, we took steps to improve the first convolutional neural network-based approach for foraminifera classification. We built an ensemble of CNNs trained on different versions of the same dataset by colorizing the black and white microscope pictures in distinctive and different ways,  and the results have shown large improvements over the previously set baseline. View this paper

Articles (10)

  • Article
  • Open Access
3 Citations
2,619 Views
14 Pages

Early Signatures of Brain Injury in the Preterm Neonatal EEG

  • Hamid Abbasi,
  • Malcolm R. Battin,
  • Robyn Butler,
  • Deborah Rowe,
  • Benjamin A. Lear,
  • Alistair J. Gunn and
  • Laura Bennet

6 September 2023

Reliable prognostic biomarkers are needed to support the early diagnosis of brain injury in extremely preterm infants, and to develop effective neuroprotective protocols that are tailored to the progressing phases of injury. Experimental and clinical...

  • Article
  • Open Access
2 Citations
2,265 Views
13 Pages

Auditing Accessibility of Pavements and Points of Interest in Urban Areas: The ‘Seek & Go’ Tool

  • Charisios Achillas,
  • Dimitrios Aidonis,
  • Naoum Tsolakis,
  • Ioannis Tsampoulatidis,
  • Alexandros Mourouzis,
  • Christos Bialas and
  • Kyriakos Koritsoglou

23 August 2023

In recent years, accessibility has become a topic of great interest on a global scale across the scientific, business, and policy sectors. There are two primary reasons for this growing trend. Firstly, accessibility serves as a vital indicator reflec...

  • Article
  • Open Access
1 Citations
2,007 Views
13 Pages

Resource Allocation of UAV-Assisted IoT Node Secure Communication System

  • Biyun Ma,
  • Diyuan Xu,
  • Xinyu Ren,
  • Yide Wang and
  • Jiaojiao Liu

21 August 2023

To balance the information security and energy harvest for massive internet-of-things (IoT) devices, an unmanned aerial vehicle (UAV)–assisted secure communication model is proposed in this paper. We extend the secure transmission model with ph...

  • Article
  • Open Access
1,983 Views
16 Pages

A Nonlinear Optimization Design Algorithm for Nearly Linear-Phase 2D IIR Digital Filters

  • Abdussalam Omar,
  • Dale Shpak,
  • Panajotis Agathoklis and
  • Belaid Moa

2 August 2023

In this paper, a new optimization method for the design of nearly linear-phase two-dimensional infinite impulse (2D IIR) digital filters with a separable denominator is proposed. A design framework for 2D IIR digital filters is formulated as a nonlin...

  • Review
  • Open Access
11 Citations
6,754 Views
36 Pages

24 July 2023

Structural deterioration is a primary long-term concern resulting from material wear and tear, events, solicitations, and disasters that can progressively compromise the integrity of a cement-based structure until it suddenly collapses, becoming a po...

  • Article
  • Open Access
4 Citations
1,895 Views
15 Pages

Improving Foraminifera Classification Using Convolutional Neural Networks with Ensemble Learning

  • Loris Nanni,
  • Giovanni Faldani,
  • Sheryl Brahnam,
  • Riccardo Bravin and
  • Elia Feltrin

17 July 2023

This paper presents a study of an automated system for identifying planktic foraminifera at the species level. The system uses a combination of deep learning methods, specifically convolutional neural networks (CNNs), to analyze digital images of for...

  • Article
  • Open Access
3 Citations
2,268 Views
17 Pages

11 July 2023

We present an algorithm for extracting basis functions from the chaotic Lorenz system along with timing and bit-sequence statistics. Previous work focused on modifying Lorenz waveforms and extracting the basis function of a single state variable. Imp...

  • Article
  • Open Access
3,033 Views
18 Pages

Beyond Frequency Band Constraints in EEG Analysis: The Role of the Mode Decomposition in Pushing the Boundaries

  • Eduardo Arrufat-Pié,
  • Mario Estévez-Báez,
  • José Mario Estévez-Carreras,
  • Gerry Leisman,
  • Calixto Machado and
  • Carlos Beltrán-León

5 July 2023

This study investigates the use of empirical mode decomposition (EMD) to extract intrinsic mode functions (IMFs) for the spectral analysis of EEG signals in healthy individuals and its possible biological interpretations. Unlike traditional EEG analy...

  • Article
  • Open Access
1 Citations
1,572 Views
11 Pages

Search Space Reduction for Localization and Tracking of an Acoustic Source

  • Orlando Camargo Rodríguez,
  • Lilun Zhang and
  • Xinghua Cheng

26 June 2023

Experimental data from the SACLANTCEN 1993 Mediterranean Experiment are reviewed to assess the reduction of the search space for the localization and tracking of an acoustic source in a three-dimensional environment. Key to this goal is the availabil...