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Applied Sciences, Volume 11, Issue 6

2021 March-2 - 440 articles

Cover Story: The butterfly flaps its wings and simultaneously moves its main body to achieve different flying motions. Its wings and body are coupled in various flight states. Through the analysis of aerodynamic simulation of a multi-rigid butterfly model, an optimal kinematic model can be obtained, and the formation and development of vortex structures are presented. The results reveal that wing flapping and abdominal swinging play a key role in reorienting the “clap and peel” mechanism and that longitudinal flight performance is mainly related to the kinematic parameters of the wing and body, which are instructive for the design of butterfly-inspired aircraft. View this paper
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Articles (440)

  • Article
  • Open Access
25 Citations
4,794 Views
15 Pages

Psychological Stress Detection According to ECG Using a Deep Learning Model with Attention Mechanism

  • Pengfei Zhang,
  • Fenghua Li,
  • Lidong Du,
  • Rongjian Zhao,
  • Xianxiang Chen,
  • Ting Yang and
  • Zhen Fang

23 March 2021

To satisfy the need to accurately monitor emotional stress, this paper explores the effectiveness of the attention mechanism based on the deep learning model CNN (Convolutional Neural Networks)-BiLSTM (Bi-directional Long Short-Term Memory) As differ...

  • Review
  • Open Access
9 Citations
4,835 Views
7 Pages

Balneotherapy with the Use of Radon–Sulphide Water: The Mechanisms of Therapeutic Effect

  • Lilla Pawlik-Sobecka,
  • Joanna Górka-Dynysiewicz and
  • Jadwiga Kuciel-Lewandowska

23 March 2021

Despite its enormous therapeutic potential, spa treatment is not always properly perceived, hence the numerous attempts to assess its effectiveness. In the world literature, there are few reports on therapy using sulphur- and radon-containing therape...

  • Article
  • Open Access
26 Citations
6,102 Views
19 Pages

A Model for Working Environment Monitoring in Smart Manufacturing

  • Dalibor Dobrilovic,
  • Vladimir Brtka,
  • Zeljko Stojanov,
  • Gordana Jotanovic,
  • Dragan Perakovic and
  • Goran Jausevac

23 March 2021

The growing application of smart manufacturing systems and the expansion of the Industry 4.0 model have created a need for new teaching platforms for education, rapid application development, and testing. This research addresses this need with a prop...

  • Article
  • Open Access
13 Citations
5,008 Views
9 Pages

23 March 2021

Difficulty walking in older adults affects their independence and ability to execute daily tasks in an autonomous way, which can result in a negative effect to their health status and risk of morbidity. Very often, reduced walking speed in older adul...

  • Article
  • Open Access
7 Citations
3,740 Views
19 Pages

An MRI-Based Patient-Specific Computational Framework for the Calculation of Range of Motion of Total Hip Replacements

  • Maeruan Kebbach,
  • Christian Schulze,
  • Christian Meyenburg,
  • Daniel Kluess,
  • Mevluet Sungu,
  • Albrecht Hartmann,
  • Klaus-Peter Günther and
  • Rainer Bader

23 March 2021

The calculation of range of motion (ROM) is a key factor during preoperative planning of total hip replacements (THR), to reduce the risk of impingement and dislocation of the artificial hip joint. To support the preoperative assessment of THR, a mag...

  • Article
  • Open Access
23 Citations
4,094 Views
15 Pages

Photostabilization of Poly(vinyl chloride) Films Blended with Organotin Complexes of Mefenamic Acid for Outdoor Applications

  • Ahmed Ahmed,
  • Gamal A. El-Hiti,
  • Angham G. Hadi,
  • Dina S. Ahmed,
  • Mohammed A. Baashen,
  • Hassan Hashim and
  • Emad Yousif

23 March 2021

This study develops a process for enhancing the photostabilization of PVC films blended with a low concentration of mefenamate–tin complex. One tri-substituted and three di-substituted organotin complexes containing mefenamate unit are synthesized, a...

  • Article
  • Open Access
5 Citations
3,567 Views
15 Pages

Evaluation of Algae-Based Biodiesel Production Topologies via Inherent Safety Index (ISI)

  • Angel Darío González-Delgado,
  • Janet B. García-Martínez and
  • Andrés F. Barajas-Solano

23 March 2021

Increasing energy needs have led to soaring fossil fuel consumption, which has caused several environmental problems. These environmental aspects along with the energy demand have motivated the search for new energy systems. In this context, biofuels...

  • Article
  • Open Access
6 Citations
2,859 Views
16 Pages

23 March 2021

This article presents a macroscopic swarm foraging behavior obtained using deep reinforcement learning. The selected behavior is a complex task in which a group of simple agents must be directed towards an object to move it to a target position witho...

  • Article
  • Open Access
4 Citations
3,944 Views
13 Pages

23 March 2021

The aim of this study was to investigate the effect of cold-water immersion (CWI) on lipid peroxides and antioxidant enzymes in adult Taekwondo athletes after a match. A cross-sectional study was performed. After a Taekwondo match, the control group...

  • Review
  • Open Access
8 Citations
7,831 Views
19 Pages

Design of a Computed Tomography Automation Architecture

  • Nicholas Hashem,
  • Mitchell Pryor,
  • Derek Haas and
  • James Hunter

23 March 2021

This paper presents a literature review on techniques related to the computed tomography procedure that incorporate automation elements in their research investigations or industrial applications. Computed tomography (CT) is a non-destructive testing...

  • Article
  • Open Access
4 Citations
2,217 Views
10 Pages

A Symmetric Three-Layer Plate with Two Coaxial Cracks under Pure Bending

  • Mykhaylo Delyavskyy,
  • Viktor Opanasovych,
  • Roman Seliverstov and
  • Oksana Bilash

23 March 2021

The purpose of this research was to investigate the effect of mechanical features and geometrical parameters on the stress–strain state of a cracked layered plate under pure bending (bending moments are uniformly distributed at infinity). The sixth-o...

  • Article
  • Open Access
16 Citations
4,720 Views
14 Pages

Uncovering Hidden Community Structure in Multi-Layer Networks

  • Faiza Riaz Khawaja,
  • Jinfang Sheng,
  • Bin Wang and
  • Yumna Memon

23 March 2021

Community detection, also known as graph clustering, in multi-layer networks has been extensively studied in the literature. The goal of community detection is to partition vertices in a network into densely connected components so called communities...

  • Feature Paper
  • Article
  • Open Access
23 Citations
6,246 Views
12 Pages

Efficiency of Machine Sanding of Wood

  • Maciej Sydor,
  • Radosław Mirski,
  • Kinga Stuper-Szablewska and
  • Tomasz Rogoziński

23 March 2021

We hypothesized that the type of wood, in combination with the grit size of sandpapers, would affect sanding efficiency. Fixed factors were used in the experiment (a belt sander with pressure p = 3828 Pa, and a belt speed of vs = 14.5 m/s) as well as...

  • Article
  • Open Access
7 Citations
5,553 Views
13 Pages

Foot Contact Dynamics and Fall Risk among Children Diagnosed with Idiopathic Toe Walking

  • Rahul Soangra,
  • Michael Shiraishi,
  • Richard Beuttler,
  • Michelle Gwerder,
  • LouAnne Boyd,
  • Venkatesan Muthukumar,
  • Mohamed Trabia,
  • Afshin Aminian and
  • Marybeth Grant-Beuttler

23 March 2021

Children that are diagnosed with Idiopathic Toe walking (cITW) are characterized by persistent toe-to-toe contacts. The objective of this study was to explore whether typical foot contact dynamics during walking predisposes cITW to a higher risk of f...

  • Article
  • Open Access
2 Citations
3,829 Views
19 Pages

23 March 2021

The current and torque ripple of inverter-fed induction motor drives is an inherent problem of control strategies working with switching frequencies in the range of multiple kilohertz, such as direct torque and, more recently, predictive torque contr...

  • Article
  • Open Access
14 Citations
4,705 Views
12 Pages

In Vitro Cytotoxic Evaluation and Apoptotic Effects of Datura innoxia Grown in Saudi Arabia and Phytochemical Analysis

  • Mohammed Al-Zharani,
  • Fahd A. Nasr,
  • Ali S. Alqahtani,
  • Mary Anne W. Cordero,
  • Amal A. Alotaibi,
  • Asmatanzeem Bepari,
  • Saud Alarifi,
  • Ali Daoud,
  • Ibrahim O. Barnawi and
  • Haytham M. Daradka

23 March 2021

Datura innoxia is an important species of Solanaceae family with several purposes in folk medicine. This study intends to explore the cytotoxic effect of D. innoxia on various cancer cell proliferation. D. innoxia ethanolic extract’s effect on the pr...

  • Article
  • Open Access
3 Citations
2,944 Views
19 Pages

23 March 2021

At relatively low effort level tasks, surface electromyogram (sEMG) spectral parameters have demonstrated an inconsistent ability to monitor localized muscle fatigue and predict endurance capacity. The main purpose of this study was to assess the pot...

  • Article
  • Open Access
5 Citations
5,615 Views
14 Pages

23 March 2021

In this paper, we propose a new method for code-switching (CS) automatic speech recognition (ASR) in Korean. First, the phonetic variations in English pronunciation spoken by Korean speakers should be considered. Thus, we tried to find a unified pron...

  • Feature Paper
  • Article
  • Open Access
22 Citations
3,584 Views
13 Pages

The Triad Hsp60-miRNAs-Extracellular Vesicles in Brain Tumors: Assessing Its Components for Understanding Tumorigenesis and Monitoring Patients

  • Francesca Graziano,
  • Domenico Gerardo Iacopino,
  • Giacomo Cammarata,
  • Gianluca Scalia,
  • Claudia Campanella,
  • Antonino Giulio Giannone,
  • Rossana Porcasi,
  • Ada Maria Florena,
  • Everly Conway de Macario and
  • Celeste Caruso Bavisotto
  • + 2 authors

23 March 2021

Brain tumors have a poor prognosis and progress must be made for developing efficacious treatments, but for this to occur their biology and interaction with the host must be elucidated beyond current knowledge. What has been learned from other tumors...

  • Feature Paper
  • Article
  • Open Access
6 Citations
3,960 Views
23 Pages

23 March 2021

This paper presents a geohazard assessment along the European continental margins and adjacent areas. This assessment is understood in the framework of the seafloor’s susceptibility to (i.e., likelihood of) being affected by the presence of hydrate d...

  • Article
  • Open Access
8 Citations
3,982 Views
24 Pages

Development of Robot Patient Lower Limbs to Reproduce the Sit-to-Stand Movement with Correct and Incorrect Applications of Transfer Skills by Nurses

  • Chingszu Lin,
  • Taiki Ogata,
  • Zhihang Zhong,
  • Masako Kanai-Pak,
  • Jukai Maeda,
  • Yasuko Kitajima,
  • Mitsuhiro Nakamura,
  • Noriaki Kuwahara and
  • Jun Ota

23 March 2021

Recently, human patient simulators have been widely developed as substitutes for real patients with the objective of applying them as training tools in nursing education. Such simulated training is perceived as beneficial for imparting the required p...

  • Article
  • Open Access
34 Citations
4,828 Views
14 Pages

Abrasive Surface Finishing on SLM 316L Parts Fabricated with Recycled Powder

  • Jakub Mesicek,
  • Quoc-Phu Ma,
  • Jiri Hajnys,
  • Jan Zelinka,
  • Marek Pagac,
  • Jana Petru and
  • Ondrej Mizera

23 March 2021

Improving the surface roughness quality of 3D printed components, especially metallic ones, which are fabricated from the selective laser melting (SLM) method, has drawn enormous attention from the research community. It should be noted that various...

  • Article
  • Open Access
14 Citations
5,396 Views
30 Pages

23 March 2021

With the rapid development of interactive technology, creating systems that allow users to define their interactive envelope freely and provide multi-interactive modalities is important to build up an intuitive interactive space. We present an indoor...

  • Article
  • Open Access
14 Citations
6,353 Views
17 Pages

Turbine Blade Temperature Field Prediction Using the Numerical Methods

  • Miroslav Spodniak,
  • Karol Semrád and
  • Katarína Draganová

23 March 2021

Nowadays, material science and stress characteristics are crucial in the field of jet engines. There are methods for fatigue life, stress, and temperature prediction; however, the conventional methods are ineffective and time-consuming. The article i...

  • Article
  • Open Access
6 Citations
3,561 Views
12 Pages

Comparative Tissue Responses of Marine Mollusks on Seasonal Changes in the Northern Adriatic Sea

  • Natalija Topić Popović,
  • Martina Krbavčić,
  • Josip Barišić,
  • Blanka Beer Ljubić,
  • Ivančica Strunjak-Perović,
  • Sanja Babić,
  • Vanesa Lorencin,
  • Daniel Matulić,
  • Tea Tomljanović and
  • Rozelindra Čož-Rakovac

23 March 2021

In the shallow Northern Adriatic, marine mollusks are affected by bottom trawling and seafood disturbance. Seasonal oscillations of oceanographic factors additionally influence their physiology, stress responses and survival. Tissue responses to seas...

  • Article
  • Open Access
7 Citations
4,763 Views
18 Pages

Frequency-Based Haze and Rain Removal Network (FHRR-Net) with Deep Convolutional Encoder-Decoder

  • Dong Hwan Kim,
  • Woo Jin Ahn,
  • Myo Taeg Lim,
  • Tae Koo Kang and
  • Dong Won Kim

23 March 2021

Removing haze or rain is one of the difficult problems in computer vision applications. On real-world road images, haze and rain often occur together, but traditional methods cannot solve this imaging problem. To address rain and haze problems simult...

  • Article
  • Open Access
22 Citations
3,791 Views
24 Pages

Biogeochemical Modelling of Uranium Immobilization and Aquifer Remediation Strategies Near NCCP Sludge Storage Facilities

  • Alexey V. Safonov,
  • Anatoly E. Boguslavsky,
  • Olga L. Gaskova,
  • Kirill A. Boldyrev,
  • Olga S. Shvartseva,
  • Albina A. Khvashchevskaya and
  • Nadezhda M. Popova

23 March 2021

Nitrate is a substance which influences the prevailing redox conditions in groundwater, and in turn the behaviour of U. The study of groundwater in an area with low-level radioactive sludge storage facilities has shown their contamination with sulpha...

  • Article
  • Open Access
11 Citations
3,783 Views
20 Pages

23 March 2021

Fixed base structures subjected to earthquake forces are prone to various issues, such as the attraction of greater forces to structure, amplified accelerations to non-structural components, expensive design for better seismic performance, and so for...

  • Article
  • Open Access
23 Citations
6,328 Views
18 Pages

23 March 2021

A comprehensive process model is proposed to simulate the steam gasification of biomass in a bubbling fluidized bed reactor using the Aspen Plus simulator. The reactor models are implemented using external FORTRAN codes for hydrodynamic and reaction...

  • Article
  • Open Access
77 Citations
6,781 Views
13 Pages

Structural Crack Detection and Recognition Based on Deep Learning

  • Cheng Yang,
  • Jingjie Chen,
  • Zhiyuan Li and
  • Yi Huang

23 March 2021

The detection and recognition of surface cracks are of great significance for structural safety. This paper is based on a deep-learning methodology to detect and recognize structural cracks. First, a training dataset of the model is built. Then, thre...

  • Review
  • Open Access
6 Citations
4,793 Views
20 Pages

Applicability of Clinical Decision Support in Management among Patients Undergoing Cardiac Surgery in Intensive Care Unit: A Systematic Review

  • Miguel Pereira,
  • Patricia Concheiro-Moscoso,
  • Alexo López-Álvarez,
  • Gerardo Baños,
  • Alejandro Pazos and
  • Javier Pereira

23 March 2021

The advances achieved in recent decades regarding cardiac surgery have led to a new risk that goes beyond surgeons’ dexterity; postoperative hours are crucial for cardiac surgery patients and are usually spent in intensive care units (ICUs), where th...

  • Article
  • Open Access
4 Citations
3,225 Views
23 Pages

23 March 2021

Energy efficiency optimization techniques for steady state operation of induction machines are the state-of-the-art, and many methods have already been developed. However, many real-world industrial and electric vehicle applications cannot be conside...

  • Review
  • Open Access
239 Citations
22,765 Views
14 Pages

The Application of Virtual Reality in Engineering Education

  • Maged Soliman,
  • Apostolos Pesyridis,
  • Damon Dalaymani-Zad,
  • Mohammed Gronfula and
  • Miltiadis Kourmpetis

23 March 2021

The advancement of VR technology through the increase in its processing power and decrease in its cost and form factor induced the research and market interest away from the gaming industry and towards education and training. In this paper, we argue...

  • Review
  • Open Access
17 Citations
7,428 Views
11 Pages

The Effect of Removable Orthodontic Appliances on Oral Microbiota: A Systematic Review

  • Alessandra Lucchese,
  • Chiara Bonini,
  • Maddalena Noviello,
  • Maria Teresa Lupo Stanghellini,
  • Raffaella Greco,
  • Jacopo Peccatori,
  • Antonella Biella,
  • Elena Tassi,
  • Valeria Beretta and
  • Maurizio Manuelli
  • + 3 authors

23 March 2021

Background (1): Removable orthodontic appliances may favor plaque accumulation and oral microbe colonization. This might be associated with intraoral adverse effects on enamel or periodontal tissues. The proposed systematic review was carried out to...

  • Feature Paper
  • Article
  • Open Access
6 Citations
3,606 Views
21 Pages

23 March 2021

One of the main issues related to robotic deburring is that the tool can get damaged or stopped when the burr thickness exceeds a certain threshold. The aim of this work is to devise a mechanism that can reduce cutting forces automatically, in the ev...

  • Article
  • Open Access
1 Citations
2,679 Views
16 Pages

23 March 2021

DC short-circuit faults are one of the challenges for modular multilevel converter (MMC) based DC grid. It is vital for proper design of protection system to estimate the fault currents and voltages. The existing calculation methods based on RLC equi...

  • Article
  • Open Access
7 Citations
3,808 Views
14 Pages

23 March 2021

An autonomous robot osteotomy using direct coordinate determination for registering was developed, and the accuracy of the designed osteotomy along the preprogrammed plan was evaluated. Furthermore, the accuracy of the robotic and manual osteotomy wa...

  • Article
  • Open Access
9 Citations
5,122 Views
11 Pages

Spondias mombin Seed Oil Compounds Identification by Raman Spectroscopy and NMR

  • Perla Yolanda López-Camacho,
  • Juan Carlos Martínez-Espinosa,
  • Gustavo Basurto-Islas,
  • Andrea Torres-Zarraga,
  • José Martín Márquez-Villa,
  • Mariana Macías-Alonso and
  • Joaquin G. Marrero

23 March 2021

Spondias mombin L. has been used in traditional medicine to treat some cases such as infections and inflammations. Some researchers have reported that its biological components, such as carotenoids, carotenes, and phenols, have been characterized pri...

  • Article
  • Open Access
45 Citations
7,144 Views
29 Pages

COVID-19 Diagnosis in Chest X-rays Using Deep Learning and Majority Voting

  • Marwa Ben Jabra,
  • Anis Koubaa,
  • Bilel Benjdira,
  • Adel Ammar and
  • Habib Hamam

23 March 2021

The COVID-19 disease has spread all over the world, representing an intriguing challenge for humanity as a whole. The efficient diagnosis of humans infected by COVID-19 still remains an increasing need worldwide. The chest X-ray imagery represents, a...

  • Article
  • Open Access
27 Citations
6,635 Views
11 Pages

Estimating Recycling Return of Integrated Circuits Using Computer Vision on Printed Circuit Boards

  • Leandro H. de S. Silva,
  • Agostinho A. F. Júnior,
  • George O. A. Azevedo,
  • Sergio C. Oliveira and
  • Bruno J. T. Fernandes

22 March 2021

The technological growth of the last decades has brought many improvements in daily life, but also concerns on how to deal with electronic waste. Electrical and electronic equipment waste is the fastest-growing rate in the industrialized world. One o...

  • Article
  • Open Access
10 Citations
4,294 Views
13 Pages

A Novel Longitudinal Speed Estimator for Four-Wheel Slip in Snowy Conditions

  • Dongmin Zhang,
  • Qiang Song,
  • Guanfeng Wang and
  • Chonghao Liu

22 March 2021

This article proposes a novel longitudinal vehicle speed estimator for snowy roads in extreme conditions (four-wheel slip) based on low-cost wheel speed encoders and a longitudinal acceleration sensor. The tire rotation factor, η, is introduced to re...

  • Article
  • Open Access
6 Citations
2,866 Views
16 Pages

22 March 2021

In this study, we propose a multi-scale ensemble learning method for thermal image enhancement in different image scale conditions based on convolutional neural networks. Incorporating the multiple scales of thermal images has been a tricky task so t...

  • Feature Paper
  • Article
  • Open Access
7 Citations
3,343 Views
15 Pages

Substitution of Material Solutions in the Operating Phase of a Building

  • Anna Sobotka,
  • Kazimierz Linczowski and
  • Aleksandra Radziejowska

22 March 2021

During the operation of buildings, repairs, modernizations, adaptations, renovations, and reconstructions of parts of historic objects are performed. There is often the problem of using a different material or construction technology than was origina...

  • Article
  • Open Access
9 Citations
3,592 Views
9 Pages

The Effect of Cement Aging on the Stability of a Cement-in-Cement Revision Construct

  • Mareike Schonhoff,
  • Therese Bormann,
  • Kevin Knappe,
  • Tobias Reiner,
  • Linda Stange and
  • Sebastian Jaeger

22 March 2021

A revision surgery can be a complicated procedure. The prevention of the removal of a well-integrated cement mantle can minimize intraoperative complications. With the cement-in-cement technique, the implant will be fixated with a layer of bone cemen...

  • Article
  • Open Access
1 Citations
3,628 Views
15 Pages

22 March 2021

Digital radiography is currently the main method of medical imaging diagnosis. It also has a wide range of applications across different fields. This study used radiation to conduct non-destructive visual imaging, and further established a quantitati...

  • Feature Paper
  • Article
  • Open Access
40 Citations
5,040 Views
22 Pages

Ontology-Based Semantic Conceptualisation of Historical Built Heritage to Generate Parametric Structured Models from Point Clouds

  • Elisabetta Colucci,
  • Xufeng Xing,
  • Margarita Kokla,
  • Mir Abolfazl Mostafavi,
  • Francesca Noardo and
  • Antonia Spanò

22 March 2021

Nowadays, cultural and historical built heritage can be more effectively preserved, valorised and documented using advanced geospatial technologies. In such a context, there is a major issue concerning the automation of the process and the extraction...

  • Article
  • Open Access
2 Citations
3,616 Views
18 Pages

22 March 2021

A recommender system (RS) refers to an agent that recommends items that are suitable for users, and it is implemented through collaborative filtering (CF). CF has a limitation in improving the accuracy of recommendations based on matrix factorization...

  • Feature Paper
  • Article
  • Open Access
6 Citations
3,816 Views
12 Pages

22 March 2021

The transfer function-generalized sidelobe canceller (TF-GSC) is one of the most popular structures for the adaptive beamformer used in multi-channel speech enhancement. Although the TF-GSC has shown decent performance, a certain amount of steering e...

  • Article
  • Open Access
1 Citations
1,934 Views
24 Pages

22 March 2021

In order to examine nerve impulses by means of simulation methodology, the models of all parts of nervous system, well suited for numerical modeling, are needed. In this paper the problem of setting up such a model, namely, that of a presynaptic bout...

  • Communication
  • Open Access
21 Citations
4,194 Views
9 Pages

22 March 2021

Bio-based polymers have been considered as an alternative to oil-based materials for their “carbon-neutral” environmentally degrative features. However, degradation is a complex system in which environmental factors and preparation conditions are inv...

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Appl. Sci. - ISSN 2076-3417