Skip to Content

Applied Sciences, Volume 11, Issue 18

2021 September-2 - 515 articles

Cover Story: Swarm Intelligence (SI) algorithms imitate the collective behavior of various swarms or groups in nature. In this work, three representative examples of SI algorithms were selected, namely, the Grey Wolf Optimizer (GWO), the Whale Optimization Algorithm (WOA), and the Salp Swarm Algorithm (SSA). These SI algorithms were applied to the synthesis of linear antenna arrays to optimize the peak sidelobe level (pSLL). Numerical tests showed that the WOA outperforms the GWO and SSA algorithms. Finally, the WOA was exploited to solve the synthesis problem of a dual-band aperture-coupled E-shaped antenna operating in 5G frequency bands. 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 (515)

  • Article
  • Open Access
8 Citations
3,883 Views
20 Pages

Toward a Mechanism for the Emergence of Gravity

  • Carlos Barceló,
  • Raúl Carballo-Rubio,
  • Luis J. Garay and
  • Gerardo García-Moreno

21 September 2021

One of the main problems that emergent-gravity approaches face is explaining how a system that does not contain gauge symmetries ab initio might develop them effectively in some regime. We review a mechanism introduced by some of the authors for the...

  • Review
  • Open Access
66 Citations
8,989 Views
27 Pages

Recent Advances on Machine Learning Applications in Machining Processes

  • Francesco Aggogeri,
  • Nicola Pellegrini and
  • Franco Luis Tagliani

21 September 2021

This study aims to present an overall review of the recent research status regarding Machine Learning (ML) applications in machining processes. In the current industrial systems, processes require the capacity to adapt to manufacturing conditions con...

  • Article
  • Open Access
12 Citations
3,173 Views
10 Pages

21 September 2021

Grasslands play an irreplaceable role in maintaining carbon balance and stabilizing the entire Earth’s ecosystem. Although the grasslands in Inner Mongolia are sensitive and vulnerable to climate change, a generalized effect of climate change on the...

  • Article
  • Open Access
13 Citations
4,224 Views
18 Pages

SPIN: A Blockchain-Based Framework for Sharing COVID-19 Pandemic Information across Nations

  • Yazeed Alabdulkarim,
  • Abdulmajeed Alameer,
  • Mohammed Almukaynizi and
  • Abdulaziz Almaslukh

21 September 2021

The COVID-19 pandemic has caused many countries around the globe to put strict policies and measures in place in an attempt to control the rapid spread of the virus. These measures have affected economic activities and have impacted a broad range of...

  • Feature Paper
  • Article
  • Open Access
6 Citations
2,752 Views
12 Pages

An Enhanced Photonic Quantum Finite Automaton

  • Alessandro Candeloro,
  • Carlo Mereghetti,
  • Beatrice Palano,
  • Simone Cialdi,
  • Matteo G. A. Paris and
  • Stefano Olivares

21 September 2021

In a recent paper we have described an optical implementation of a measure-once one-way quantum finite automaton recognizing a well-known family of unary periodic languages, accepting words not in the language with a given error probability. To proce...

  • Article
  • Open Access
3 Citations
2,657 Views
19 Pages

21 September 2021

Cross-modal hashing technology is a key technology for real-time retrieval of large-scale multimedia data in real-world applications. Although the existing cross-modal hashing methods have achieved impressive accomplishment, there are still some limi...

  • Article
  • Open Access
34 Citations
6,557 Views
21 Pages

21 September 2021

In recent years, Historic Building Information Modelling (HBIM) methodology has strengthened the documentation and interpretation of archaeological contexts and is regarded as a breakthrough in relation to established methodologies and analyses. Chan...

  • Article
  • Open Access
1 Citations
3,621 Views
12 Pages

The Intake of Pain Medication among Dentists and Dental Assistants with Musculoskeletal Disorders in Germany

  • Yvonne Haas,
  • Antonia Naser,
  • Eileen M. Wanke,
  • Jasmin Haenel,
  • Laura Fraeulin,
  • Fabian Holzgreve,
  • Christina Erbe,
  • Werner Betz,
  • Doerthe Brueggmann and
  • Daniela Ohlendorf
  • + 2 authors

21 September 2021

Background: Dentists (Ds) and dental assistants (DAs) have a high lifetime prevalence of musculoskeletal disorders (MSDs). In this context, it is assumed that they have an increased intake of substances such as pain medication. Currently, there exist...

  • Article
  • Open Access
4 Citations
9,479 Views
12 Pages

Modeling of Metabolic Equivalents (METs) during Moderate Resistance Training Exercises

  • Muhammad Adeel,
  • Chien-Hung Lai,
  • Chun-Wei Wu,
  • Jiunn-Horng Kang,
  • Jian-Chiun Liou,
  • Hung-Chou Chen,
  • Bor-Shing Lin,
  • Meng-Jyun Hong,
  • Chun-Ta Feng and
  • Chih-Wei Peng

21 September 2021

Energy expenditure through metabolic equivalent (MET) prediction during resistance exercises in humans can be modeled by using cardiorespiratory parameters. In this study, we aimed to predict MET during six moderate-intensity resistance training sess...

  • Article
  • Open Access
3,166 Views
18 Pages

Improving the Discriminability of Haptic Icons: The Haptic Tuning Fork

  • Laura Raya,
  • Sara A. Boga,
  • Marcos Garcia-Lorenzo and
  • Sofia Bayona

21 September 2021

Technological advances enable the capture and management of complex data sets that need to be correctly understood. Visualisation techniques can help in complex data analysis and exploration, but sometimes the visual channel is not enough, or it is n...

  • Article
  • Open Access
22 Citations
6,149 Views
12 Pages

Analysis of Running Performance in the Offensive and Defensive Phases of the Game: Is It Associated with the Team Achievement in the UEFA Champions League?

  • Toni Modric,
  • Sime Versic,
  • Patrik Drid,
  • Marko Stojanovic,
  • Łukasz Radzimiński,
  • Cyril Bossard,
  • Tomasz Aftański and
  • Damir Sekulic

21 September 2021

Although associations between running performance (RP) with ball possession and team achievement in soccer are often hypothesized, actual knowledge of this association in elite soccer remains limited. Therefore, this study aimed to evaluate players’...

  • Article
  • Open Access
3 Citations
3,322 Views
7 Pages

Resonant X-ray Emission Spectroscopy with a SASE Beam

  • Wojciech Błachucki,
  • Yves Kayser,
  • Anna Wach,
  • Rafał Fanselow,
  • Christopher Milne,
  • Jacinto Sá and
  • Jakub Szlachetko

21 September 2021

Aqueous iron (III) oxide nanoparticles were irradiated with pure self-amplified spontaneous emission (SASE) X-ray free-electron laser (XFEL) pulses tuned to the energy around the Fe K-edge ionization threshold. For each XFEL shot, the incident X-ray...

  • Article
  • Open Access
12 Citations
11,993 Views
13 Pages

21 September 2021

This study examines the relationship between speech characteristics and personality traits by drawing on pseudo-naturalistic conversations and on personality dimensions identified by the Myers–Briggs Type Indicator (MBTI) model which assesses four pe...

  • Article
  • Open Access
16 Citations
4,344 Views
20 Pages

21 September 2021

Optimal controllers, namely Model Predictive Control (MPC), H Control (H), and Linear Quadratic Gaussian control (LQG), are designed for a 5 MW horizontal-axis variable-speed wind turbine. The control design models required as part of the optimal c...

  • Article
  • Open Access
2 Citations
2,977 Views
10 Pages

Optimization of Storage Medium for Hematological Reference Samples in External Quality Assessment

  • Ngoc Nguyen Vo,
  • Huu Tam Tran,
  • Quan Thuy Truong and
  • Thuy Huong Nguyen

21 September 2021

Hematological reference samples for external quality assessment (EQA) in hematology are essential for many laboratories in Vietnam, however, the prices are high along with short storing time. This study attempted to establish an optimal formula for t...

  • Feature Paper
  • Article
  • Open Access
49 Citations
6,170 Views
14 Pages

21 September 2021

Natural and synthetic rubber is gaining increased interest in various industrial applications and daily life sectors (automotive industry, acoustic and electrical isolators, adhesives, impermeable surfaces, and others) due to its remarkable physicome...

  • Article
  • Open Access
9 Citations
3,766 Views
12 Pages

21 September 2021

In this study, a compact 2 × 2 circularly polarized (CP) sequentially rotated (SR) dielectric resonator antenna (DRA) array operating in the IEEE 802.11a band is presented. To acquire the CP radiation, an elliptical slot (ES) was introduced to couple...

  • Review
  • Open Access
8 Citations
3,913 Views
20 Pages

21 September 2021

The purpose of smart grid architecture as compared to the conventional grid is to ensure more stability, reliability and bi-directional communication between the utility and the consumer. The deployment of the same has succeeded in improving the effi...

  • Communication
  • Open Access
11 Citations
10,235 Views
14 Pages

Ensuring Data Integrity in Databases with the Universal Basis of Relations

  • Vitalii Yesin,
  • Mikolaj Karpinski,
  • Maryna Yesina,
  • Vladyslav Vilihura and
  • Kornel Warwas

21 September 2021

The objective of the paper was to reveal the main techniques and means of ensuring the integrity of data and persistent stored database modules implemented in accordance with the recommendations of the Clark–Wilson model as a methodological basis for...

  • Editorial
  • Open Access
3 Citations
3,065 Views
4 Pages

21 September 2021

The study of human–environment interactions is one of the mainstream topics in archaeological research, with increasing interest in the context of current societal challenges concerning environmental shifts related to climate change, sea-level rise,...

  • Article
  • Open Access
3,528 Views
14 Pages

21 September 2021

Purpose: this study investigated the effects of the intensity of machine-based bicep curl resistance exercise on ultrafast ultrasound-derived muscle strain rate and carotid ultrafast pulse wave velocity (ufPWV), and examined the association between m...

  • Feature Paper
  • Article
  • Open Access
2 Citations
3,080 Views
9 Pages

21 September 2021

Cruciferous vegetables are very popular in latitudes corresponding to central and eastern Europe. They are rich in bioactive compounds such as chlorophylls, carotenoids, and polyphenols. The type and quality of fertilization has a significant impact...

  • Article
  • Open Access
12 Citations
4,963 Views
18 Pages

21 September 2021

Unmanned aerial vehicles (UAVs) nowadays represent an interesting tool capable of performing various missions. The multirotor type of UAV is proven to be a potential solution in missions that require precise movements, such as environmental objects m...

  • Article
  • Open Access
43 Citations
11,157 Views
16 Pages

21 September 2021

Evaluating the site-selection process for photovoltaic (PV) plants is essential for securing available areas for solar power plant installation in limited spaces. Although the vicinities of highway networks can be suitable for installing PV plants, i...

  • Review
  • Open Access
10 Citations
5,706 Views
22 Pages

Facing Phototrophic Microorganisms That Colonize Artistic Fountains and Other Wet Stone Surfaces: Identification Keys

  • Fernando Bolivar-Galiano,
  • Oana Adriana Cuzman,
  • Clara Abad-Ruiz and
  • Pedro Sánchez-Castillo

21 September 2021

All fountains are inhabited by phototrophic microorganisms, especially if they are functional and located outdoors. This fact, along with the regular presence of water and the intrinsic bioreceptivity of stone material, easily favors the biological d...

  • Article
  • Open Access
11 Citations
5,832 Views
20 Pages

Optimization of Electricity Generation Technologies to Reduce Carbon Dioxide Emissions in Egypt

  • Ahmed Abdel-Hameed,
  • Juyoul Kim,
  • Joung-Hyuk Hyun,
  • Hilali Hussein Ramadhan,
  • Soja Reuben Joseph and
  • Mercy Nandutu

21 September 2021

In February 2016, the Egyptian government introduced Egyptian Vision 2030. An important pillar of this vision is energy. Egyptian Vision 2030 presented renewable energy as the best solution to reduce the emission of greenhouse gases (GHGs) in the ene...

  • Article
  • Open Access
5 Citations
4,231 Views
14 Pages

21 September 2021

Folk dance is a collection of traditional dances that requires years of practicing to perform correctly. The aim of the present study was to develop a complex biomechanical measurement procedure that investigated Hungarian folk dancers’ balancing abi...

  • Article
  • Open Access
6 Citations
4,244 Views
13 Pages

Nannochloropsis oceanica as a Sustainable Source of n-3 Polyunsaturated Fatty Acids for Enrichment of Hen Eggs

  • Marta Neves,
  • Ana Ferreira,
  • Madalena Antunes,
  • Joana Laranjeira Silva,
  • Susana Mendes,
  • Maria M. Gil and
  • Carla Tecelão

20 September 2021

This study aimed to evaluate the potential of the marine microalgae Nannochloropsis oceanica as a sustainable source of n-3 polyunsaturated fatty acids (n-3 PUFA) for hen eggs enrichment. During 4 weeks, hens were fed with 3% (w/w) of Nannochloropsis...

  • Article
  • Open Access
8 Citations
9,835 Views
8 Pages

20 September 2021

We aimed to investigate the changes caused by focused extracorporeal shock wave pain therapy (f-ESWT) in patients with patellar tendinopathy by means of ultrasound imaging. We included 18 knees from 11 college athletes with patellar tendinopathy. We...

  • Feature Paper
  • Article
  • Open Access
6 Citations
4,739 Views
12 Pages

20 September 2021

The Power-Split Continuously Variable Transmission is one of the most promising architectures for Hybrid Electric Vehicles. These systems have been introduced to improve vehicle global efficiency since they can maximize the efficiency in varying oper...

  • Article
  • Open Access
4 Citations
4,377 Views
29 Pages

20 September 2021

Mobile Augmented Reality (MAR) is designed to keep pace with high-end mobile computing and their powerful sensors. This evolution excludes users with low-end devices and network constraints. This article presents ModAR, a hybrid Android prototype tha...

  • Article
  • Open Access
3 Citations
2,982 Views
12 Pages

20 September 2021

In this paper, we consider two mechanisms capable of inducing strain localisation in particulate geomaterials in compression: the apparent negative stiffness and the incremental incompressibility caused by dilatancy. It is demonstrated that the appar...

  • Article
  • Open Access
9 Citations
3,649 Views
16 Pages

A Hardware-Oriented Algorithm for Real-Time Music Key Signature Recognition

  • Paulina Kania,
  • Dariusz Kania and
  • Tomasz Łukaszewicz

20 September 2021

The algorithm presented in this paper provides the means for the real-time recognition of the key signature associated with a given piece of music, based on the analysis of a very small number of initial notes. The algorithm can easily be implemented...

  • Feature Paper
  • Article
  • Open Access
18 Citations
4,001 Views
17 Pages

Key-Parameters in Chemical Stabilization of Soils with Multiwall Carbon Nanotubes

  • António Alberto S. Correia,
  • Pedro D. F. Casaleiro,
  • Diogo T. R. Figueiredo,
  • Marta S. M. R. Moura and
  • Maria Graça Rasteiro

20 September 2021

Chemical stabilization is one of the most successful techniques that has been applied to improve the geomechanical behavior of soil. Several additives have been studied to be a sustainable alternative to traditional additives (Portland cement and lim...

  • Article
  • Open Access
73 Citations
15,797 Views
24 Pages

Interactions in Augmented and Mixed Reality: An Overview

  • Theofilos Papadopoulos,
  • Konstantinos Evangelidis,
  • Theodore H. Kaskalis,
  • Georgios Evangelidis and
  • Stella Sylaiou

20 September 2021

“Interaction” represents a critical term in the augmented and mixed reality ecosystem. Today, in mixed reality environments and applications, interaction occupies the joint space between any combination of humans, physical environment, and computers....

  • Article
  • Open Access
4 Citations
2,571 Views
13 Pages

Laser Assisted Size Reduction of Gold (Au) Particles onto a Titanium (Ti) Substrate Surface

  • Oktawian Bialas,
  • Tomasz Poloczek,
  • Mateusz Lis,
  • Adam Skowronek,
  • Jacek Górka and
  • Marcin Adamiak

20 September 2021

This paper aims to perform laser assisted size reduction to nanoparticles of gold (Au) sputtered layer on titanium (Ti) base material using an innovative method that could potentially be applied in novel blood contact and thromboresistive devices in...

  • Article
  • Open Access
8 Citations
3,740 Views
14 Pages

Rutile in Amphibolite Facies Metamorphic Rocks: A Rare Example from the East Qinling Orogen, China

  • Changming Wang,
  • Shicheng Rao,
  • Kangxing Shi,
  • Leon Bagas,
  • Qi Chen,
  • Jiaxuan Zhu,
  • Hongyu Duan and
  • Lijun Liu

20 September 2021

Rutile is an important ore mineral to meet the increasing demand of critical metal Ti in various sectors. Here we report a rare example of rutile deposits hosted within the Baishugang–Wujianfang amphibolite-facies metamorphic rocks in the East Qinlin...

  • Article
  • Open Access
9 Citations
2,811 Views
21 Pages

Experimental Campaign to Verify the Suitability of Ultrasound Testing Method for Steel Fiber Reinforced Concrete Fortification Structures

  • Eva Zezulová,
  • Kamila Hasilová,
  • Petr Dvořák,
  • Branislav Dubec,
  • Tereza Komárková and
  • Jiří Štoller

20 September 2021

Fortification structures, both military and civilian, are designed to resist a blast explosion to some extent. Their technical condition after a blast load must be assessed in a fast and reliable way to enable the users’ decision about the future use...

  • Communication
  • Open Access
10 Citations
5,883 Views
10 Pages

Hepatoprotective Effects of Extract of Helicteres hirsuta Lour. on Liver Fibrosis Induced by Carbon Tetrachloride in Rats

  • Dac Thang Hoang,
  • Thi Thu Hien Truong,
  • Ngo Viet Duc,
  • Le Tuan Anh Hoang,
  • Thi Thao Do,
  • Le Ba Vinh,
  • Seo Young Yang,
  • Gao Dan and
  • Le Tuan Anh

20 September 2021

Helicteres hirsuta Lour. is a traditional Vietnamese medicine for treating chronic liver diseases such as cirrhosis and liver cancer. Many in vitro and in vivo experiments have demonstrated that the extracts and isolated compounds from H. hirsuta hav...

  • Article
  • Open Access
36 Citations
15,525 Views
21 Pages

A Novel Slicing Strategy to Print Overhangs without Support Material

  • Michael Wüthrich,
  • Maurus Gubser,
  • Wilfried J. Elspass and
  • Christian Jaeger

20 September 2021

Fused deposition modeling (FDM) 3D printers commonly need support material to print overhangs. A previously developed 4-axis printing process based on an orthogonal kinematic, an additional rotational axis around the z-axis and a 45° tilted nozzle ca...

  • Article
  • Open Access
58 Citations
7,078 Views
15 Pages

Homomorphic Encryption Based Privacy-Preservation for IoMT

  • Mikail Mohammed Salim,
  • Inyeung Kim,
  • Umarov Doniyor,
  • Changhoon Lee and
  • Jong Hyuk Park

20 September 2021

Healthcare applications store private user data on cloud servers and perform computation operations that support several patient diagnoses. Growing cyber-attacks on hospital systems result in user data being held at ransom. Furthermore, mathematical...

  • Article
  • Open Access
6 Citations
3,776 Views
42 Pages

20 September 2021

One of the main challenges in studying brain signals is the large size of the data due to the use of many electrodes and the time-consuming sampling. Choosing the right dimensional reduction method can lead to a reduction in the data processing time....

  • Feature Paper
  • Article
  • Open Access
31 Citations
5,564 Views
15 Pages

Optimum Design of Flexural Strength and Stiffness for Reinforced Concrete Beams Using Machine Learning

  • Nazim Abdul Nariman,
  • Khader Hamdia,
  • Ayad Mohammad Ramadan and
  • Hamed Sadaghian

20 September 2021

In this paper, an optimization approach was presented for the flexural strength and stiffness design of reinforced concrete beams. Surrogate modeling based on machine learning was applied to predict the responses of the structural system in three-poi...

  • Article
  • Open Access
14 Citations
5,673 Views
12 Pages

19 September 2021

Faults represent important analytical targets for the identification of perceptual ground motions and associated seismic hazards. In particular, during oil production, important data such as the path and flow rate of fluid flows can be obtained from...

  • Feature Paper
  • Article
  • Open Access
27 Citations
12,068 Views
25 Pages

Vulnerability Management Models Using a Common Vulnerability Scoring System

  • Michał Walkowski,
  • Jacek Oko and
  • Sławomir Sujecki

19 September 2021

Vulnerability prioritization is an essential element of the vulnerability management process in data communication networks. Accurate prioritization allows the attention to be focused on the most critical vulnerabilities and their timely elimination;...

  • Article
  • Open Access
1 Citations
4,430 Views
9 Pages

19 September 2021

Temporary anchorage devices (TADs) allow molar intrusion as an additional treatment option to conventional treatment for open bite cases. We investigated the treatment option criteria for open bite treatment. A total of 33 patients with skeletal Clas...

  • Article
  • Open Access
3 Citations
3,482 Views
57 Pages

Empirical Study of Constraint-Handling Techniques in the Optimal Synthesis of Mechanisms for Rehabilitation

  • José Saúl Muñoz-Reina,
  • Miguel Gabriel Villarreal-Cervantes and
  • Leonel Germán Corona-Ramírez

19 September 2021

Currently, rehabilitation systems with closed kinematic chain mechanisms are low-cost alternatives for treatment and health care. In designing these systems, the dimensional synthesis is commonly stated as a constrained optimization problem to achiev...

  • Feature Paper
  • Article
  • Open Access
12 Citations
4,745 Views
17 Pages

Remote Monitoring of Ground Motion Hazards in High Mountain Terrain Using InSAR: A Case Study of the Lake Sarez Area, Tajikistan

  • Stephen Grebby,
  • Andrew Sowter,
  • David Gee,
  • Ahmed Athab,
  • Betsabé De la Barreda-Bautista,
  • Renoy Girindran and
  • Stuart Marsh

19 September 2021

High mountain terrains, with steep slopes and deep valleys, are generally challenging areas to monitor using satellite earth observation techniques since the terrain creates perspective distortions and differences in illumination that can occlude or...

  • Article
  • Open Access
5 Citations
3,729 Views
13 Pages

19 September 2021

This work uses sequence-to-sequence (seq2seq) models pre-trained on monolingual corpora for machine translation. We pre-train two seq2seq models with monolingual corpora for the source and target languages, then combine the encoder of the source lang...

  • Review
  • Open Access
22 Citations
6,598 Views
11 Pages

Effects of Heat Treatment Processes: Health Benefits and Risks to the Consumer

  • Miguel Cascais,
  • Pedro Monteiro,
  • Diana Pacheco,
  • João Cotas,
  • Leonel Pereira,
  • João Carlos Marques and
  • Ana M. M. Gonçalves

19 September 2021

Macroalgae are a biological group that has mainly been used in Asian countries; however, the interest shown by Western society is recent, its application in the industrial sector having increased in the last few decades. Seaweeds are filled with prop...

of 11

Get Alerted

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

XFacebookLinkedIn
Appl. Sci. - ISSN 2076-3417