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Applied Sciences, Volume 13, Issue 8

April-2 2023 - 570 articles

Cover Story: In this work, a novel metamaterial lens (metalens) is designed and optimized to improve the radiation performance of an antipodal Vivaldi antenna for wideband applications. The metalens is integrated into the antenna substrate and placed close to the tapered slot in the end-fire direction, allowing the antenna to maintain its light weight and compactness. The prototype has been fabricated and characterized, demonstrating good agreement with the simulations. The insertion of the metalens allows, with respect to the pristine Vivaldi, a measured maximum gain of Gmax=14.2  dB, increased by about ΔGmax=4.8 dB; an operating bandwidth of f=3÷14.7 GHz, increased by Δf=1.2 GHz; and a radiation pattern with a maximum reduction in half-power beamwidth of ΔHPBWmax=31.3°, which is more symmetrical in the E and H planes. View this paper
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Articles (570)

  • Article
  • Open Access
1 Citations
2,176 Views
16 Pages

21 April 2023

This paper investigates a rapid modeling method and robust analysis of hypersonic vehicles using multidisciplinary integrated techniques. First, the geometrical configuration is described using parametric methods based on the class–shape techni...

  • Article
  • Open Access
5 Citations
78,441 Views
32 Pages

Deep Learning Methods for Bug Bite Classification: An End-to-End System

  • Bojan Ilijoski,
  • Katarina Trojachanec Dineva,
  • Biljana Tojtovska Ribarski,
  • Petar Petrov,
  • Teodora Mladenovska,
  • Milena Trajanoska,
  • Ivana Gjorshoska and
  • Petre Lameski

21 April 2023

A bite from a bug may expose the affected person to serious, life-threatening conditions, which may require immediate medical attention. The identification of the bug bite may be challenging even for experienced medical personnel due to the different...

  • Article
  • Open Access
9 Citations
3,831 Views
14 Pages

Decision Support System for Predicting Mortality in Cardiac Patients Based on Machine Learning

  • Ashir Javeed,
  • Muhammad Asim Saleem,
  • Ana Luiza Dallora,
  • Liaqat Ali,
  • Johan Sanmartin Berglund and
  • Peter Anderberg

21 April 2023

Researchers have proposed several automated diagnostic systems based on machine learning and data mining techniques to predict heart failure. However, researchers have not paid close attention to predicting cardiac patient mortality. We developed a c...

  • Article
  • Open Access
6 Citations
3,632 Views
17 Pages

Analysis of a Motocross Knee Brace: From the Real Model to the Numerical Finite Element Model via 3D Scanning and Reverse Engineering

  • Lucrezia Lazzarini,
  • Marco Civera,
  • Vito Burgio,
  • Mariana Rodriguez Reinoso,
  • Paola Antonaci and
  • Cecilia Surace

21 April 2023

Musculoskeletal injuries often occur when performing motocross; almost half of the overall ligamentous injuries (42%) are knee ligaments injuries. Lesions can be greatly reduced with knee braces. Commercial knee braces are expected to oppose and limi...

  • Article
  • Open Access
1,930 Views
12 Pages

A New Instrument Monitoring Method Based on Few-Shot Learning

  • Beini Zhang,
  • Liping Li,
  • Yetao Lyu,
  • Shuguang Chen,
  • Lin Xu and
  • Guanhua Chen

21 April 2023

As an important part of the industrialization process, fully automated instrument monitoring and identification are experiencing an increasingly wide range of applications in industrial production, autonomous driving, and medical experimentation. How...

  • Article
  • Open Access
8 Citations
3,253 Views
27 Pages

21 April 2023

In the era of digital transformation, industry is facing multiple challenges due to the need for implementation of the Industry 4.0 standards, as well as the volatility of customer demands. The latter has created the need for the design and operation...

  • Article
  • Open Access
7 Citations
3,298 Views
22 Pages

Numerical Performance of a Buoy-Type Wave Energy Converter with Regular Short Waves

  • Carlos Sosa,
  • Ismael Mariño-Tapia,
  • Rodolfo Silva and
  • Rodrigo Patiño

21 April 2023

The numerical performance of a buoy-type wave energy converter (WEC) under regular wave conditions is described in this paper. The open-source computational fluid dynamics software OpenFOAM® was used to couple a grid for the solid body motion of...

  • Article
  • Open Access
6 Citations
3,272 Views
19 Pages

21 April 2023

Graphite stone is widely used in various industries, including the refractory, battery making, steel making, expanded graphite, brake pads, casting coatings, and lubricants industries. In the mineral processing industry, an effective and accurate dia...

  • Article
  • Open Access
3 Citations
2,381 Views
13 Pages

21 April 2023

For decades, researchers have been concerned with house price modeling, and recognition has grown for the necessity of considering environmental and contextual variables in the process. This research examines the association between neighborhood char...

  • Communication
  • Open Access
9 Citations
2,519 Views
8 Pages

21 April 2023

The incorporation of hysteresis models in computational electromagnetic software is of paramount importance for the accurate prediction of the ferromagnetic devices’ performance. The Preisach and Jiles-Atherton (J-A) models are frequently used...

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Appl. Sci. - ISSN 2076-3417