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Applied Sciences, Volume 10, Issue 2

2020 January-2 - 305 articles

Cover Story: Haematococcus pluvialis accumulates astaxanthin, which is a high-value antioxidant, during the red cyst stage of its lifecycle. Development of a rigid cell wall in the cysts hinders the recovery of astaxanthin. This article investigates morphological changes and cell disruption of mature Haematococcus pluvialis cysts while using high-pressure homogenization for astaxanthin extraction. Mechanical treatment resulted in 91% of cell disruption and a proportional increase in astaxanthin recovery. This study recommends a synergistic combination of rapid instrumental particle-volume-distribution analysis and microscope-based morphologic phenotyping for the development of practical biorefinery processes that co-produce various biological products, including lipids, proteins, carbohydrates, and astaxanthin. View this paper.
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Articles (305)

  • Article
  • Open Access
29 Citations
6,014 Views
14 Pages

Use of Smart Technology to Improve Management of Utility Tunnels

  • Isam Shahrour,
  • Hanbing Bian,
  • Xiongyao Xie and
  • Zixin Zhang

20 January 2020

This paper presents a smart solution for the utility tunnel, which allows hosting a wide range of water and energy utilities in an accessible underground space. It is well known that utility tunnels offer major advantages such as the possibility to i...

  • Article
  • Open Access
2 Citations
4,286 Views
10 Pages

Variable Curvature Displays: Optical Designs and Applications for VR/AR/MR Headsets

  • Eduard Muslimov,
  • Thibault Behaghel,
  • Emmanuel Hugot,
  • Kelly Joaquina and
  • Ilya Guskov

20 January 2020

In the present paper, we discuss the design of a projection system with curved display and its enhancement by variably adjusting the curvature. We demonstrate that the focal surface curvature varies significantly with a change of the object position...

  • Feature Paper
  • Article
  • Open Access
37 Citations
5,713 Views
13 Pages

20 January 2020

Object tracking has long been an active research topic in image processing and computer vision fields with various application areas. For practical applications, the object tracking technique should be not only accurate but also fast in a real-time s...

  • Article
  • Open Access
41 Citations
8,457 Views
23 Pages

Managing a Smart City Integrated Model through Smart Program Management

  • Vita Santa Barletta,
  • Danilo Caivano,
  • Giovanni Dimauro,
  • Antonella Nannavecchia and
  • Michele Scalera

20 January 2020

Context. A Smart city is intended as a city able to offer advanced integrated services, based on information and communication technology (ICT) technologies and intelligent (smart) use of urban infrastructures for improving the quality of life of its...

  • Article
  • Open Access
3,822 Views
18 Pages

20 January 2020

Subwavelength optical micro/nanofibers have been widely used as basic building blocks in the field of quantum sensing and quantum light source by virtue of their properties which include pronounced evanescent field, large surface area, and small opti...

  • Article
  • Open Access
8 Citations
4,322 Views
10 Pages

Development of a Structural Monitoring System for Cable Bridges by Using Seismic Accelerometers

  • Seong-Hoon Jeong,
  • Won-Seok Jang,
  • Jin-Won Nam,
  • Hohyun An and
  • Dae-Jin Kim

20 January 2020

In this study, a structural health monitoring system for cable-stayed bridges is developed. In the system, condition assessment of the structure is performed based on measured records from seismic accelerometers. Response indices are defined to monit...

  • Article
  • Open Access
22 Citations
3,881 Views
29 Pages

20 January 2020

Many studies on cracked rotors developed crack breathing models that assume that the neutral axis of bending always remains horizontal for simplification. These models may generate significant discrepancies and thus there is a need to develop more so...

  • Article
  • Open Access
6 Citations
3,913 Views
22 Pages

A New Integrated Approach Based on the Iterative Super-Resolution Algorithm and Expectation Maximization for Face Hallucination

  • K. Lakshminarayanan,
  • R. Santhana Krishnan,
  • E. Golden Julie,
  • Y. Harold Robinson,
  • Raghvendra Kumar,
  • Le Hoang Son,
  • Trinh Xuan Hung,
  • Pijush Samui,
  • Phuong Thao Thi Ngo and
  • Dieu Tien Bui

20 January 2020

This paper proposed and verified a new integrated approach based on the iterative super-resolution algorithm and expectation-maximization for face hallucination, which is a process of converting a low-resolution face image to a high-resolution image....

  • Article
  • Open Access
34 Citations
4,014 Views
16 Pages

20 January 2020

The energy consumption used for domestic purposes in Europe is, to a considerable extent, due to heating and cooling. This energy is produced mostly by burning fossil fuels, which has a high negative environmental impact. The characteristics of a bui...

  • Article
  • Open Access
11 Citations
4,723 Views
15 Pages

20 January 2020

Three types of multi-wall shielding were experimentally investigated for their performances under the high-velocity impact of a cm-size cylindrical projectile by using a two-stage light-gas gun. The three shields contained the same two aluminum bumpe...

  • Article
  • Open Access
4 Citations
3,215 Views
11 Pages

20 January 2020

For the degree of orderly arrangement of the molecular chains at the interface of nanocomposites, the static and sheared polyethylene (PE)/carbon nanotube (CNT) models and the sheared pure PE model were constructed, and molecular simulation experimen...

  • Article
  • Open Access
15 Citations
6,382 Views
20 Pages

Improving Incident Response in Big Data Ecosystems by Using Blockchain Technologies

  • Julio Moreno,
  • Manuel A. Serrano,
  • Eduardo B. Fernandez and
  • Eduardo Fernández-Medina

20 January 2020

Big data ecosystems are increasingly important for the daily activities of any type of company. They are decisive elements in the organization, so any malfunction of this environment can have a great impact on the normal functioning of the company; s...

  • Article
  • Open Access
4 Citations
3,278 Views
14 Pages

20 January 2020

This paper proposes a hierarchical control strategy to coordinate battery energy storage devices based on a multi-agent system. The heterogeneous nature of the battery volume is paid much more attention in designing the proportional protocol of the c...

  • Editorial
  • Open Access
23,256 Views
176 Pages

20 January 2020

The editorial team greatly appreciates the reviewers who have dedicated their considerable time and expertise to the journal’s rigorous editorial process over the past 12 months, regardless of whether the papers are finally published or not [...]

  • Article
  • Open Access
32 Citations
6,451 Views
17 Pages

20 January 2020

The service-based architecture of the Fifth Generation(5G) had combined the services and security architectures and enhanced the authentication process of services to expand the coverage of the network, including heterogeneous devices. This architect...

  • Article
  • Open Access
3 Citations
4,645 Views
15 Pages

Optical Flow-Based Fast Motion Parameters Estimation for Affine Motion Compensation

  • Antoine Chauvet,
  • Yoshihiro Sugaya,
  • Tomo Miyazaki and
  • Shinichiro Omachi

20 January 2020

This study proposes a lightweight solution to estimate affine parameters in affine motion compensation. Most of the current approaches start with an initial approximation based on the standard motion estimation, which only estimates the translation p...

  • Article
  • Open Access
5 Citations
3,881 Views
13 Pages

Properties of Curved Parts Laser Cladding Based on Controlling Spot Size

  • Haibo Huang,
  • Wenlei Sun,
  • Yong Huang and
  • Jiangtong Yu

20 January 2020

In this study, a method based on controlling the laser spot size was proposed in the process of curved parts laser cladding, and the coatings obtained by this method were analysed through investigation of the microstructure, microhardness, adhesion p...

  • Article
  • Open Access
85 Citations
16,218 Views
15 Pages

Real-Time Hand Gesture Spotting and Recognition Using RGB-D Camera and 3D Convolutional Neural Network

  • Dinh-Son Tran,
  • Ngoc-Huynh Ho,
  • Hyung-Jeong Yang,
  • Eu-Tteum Baek,
  • Soo-Hyung Kim and
  • Gueesang Lee

20 January 2020

Using hand gestures is a natural method of interaction between humans and computers. We use gestures to express meaning and thoughts in our everyday conversations. Gesture-based interfaces are used in many applications in a variety of fields, such as...

  • Article
  • Open Access
17 Citations
4,413 Views
21 Pages

20 January 2020

Experiments with gypsum as a model rock material were conducted to investigate the characteristics of crack growth under monotonic and cyclic loading. The specimens had two pre-existing flaws that were placed at different inclination angle, spacing a...

  • Article
  • Open Access
30 Citations
5,307 Views
11 Pages

19 January 2020

The effect of airflow rate, biomass moisture content, particle size, and compactness on the surface properties of biochar produced in a top-lit updraft gasifier was investigated. Pine woodchips were studied as the feedstock. The carbonization airflow...

  • Article
  • Open Access
14 Citations
4,325 Views
15 Pages

19 January 2020

The prediction aptitude of an artificial neural network (ANN) is improved by incorporating two novel metaheuristic techniques, namely, the shuffled frog leaping algorithm (SFLA) and wind-driven optimization (WDO), for the purpose of soil shear streng...

  • Article
  • Open Access
3 Citations
4,500 Views
11 Pages

Immediate Effect of Whole-Body Vibration on Skin Temperature and Lower-Limb Blood Flow in Older Adults with Type 2 Diabetes: Pilot Study

  • Kennedy Freitas Pereira Alves,
  • Ana Paula de Lima Ferreira,
  • Luana Caroline de Oliveira Parente,
  • François Talles Medeiros Rodrigues,
  • Thais Vitorino Marques,
  • Gabriel Barreto Antonino,
  • Luiz Carlos de Melo,
  • Débora Wanderley Villela,
  • Marcelo Renato Guerino and
  • Maria das Graças Rodrigues de Araújo
  • + 4 authors

19 January 2020

The purpose of this study was to evaluate the response of a single whole-body vibration (WBV) training session to peripheral skin temperature and peripheral blood flow of older adults with type 2 diabetes. A double-blind, controlled clinical trial wa...

  • Article
  • Open Access
10 Citations
3,249 Views
28 Pages

19 January 2020

Due to the accelerating pace of environmental concerns and fear of the depletion of conventional sources of energy, researchers are working on finding renewable energy sources of power for different axes of life. The transportation sector has interve...

  • Article
  • Open Access
4 Citations
3,749 Views
8 Pages

High-Speed Light Signal Transmitters for Optical Communication Based on Ultraviolet Radiation

  • Xin Li,
  • Yue Wu,
  • Jialei Yuan,
  • Shuyu Ni,
  • Chuan Qin,
  • Yan Jiang,
  • Jie Li and
  • Yongjin Wang

19 January 2020

A light signal transmitter based on ultraviolet radiation is realized on GaN-on-silicon platform. The light signal transmitter with ultra-small active area is fabricated by a double-etching process. The absolute value of negative junction capacitance...

  • Article
  • Open Access
10 Citations
4,194 Views
22 Pages

19 January 2020

A simplified numerical model is introduced to predict ice impact force acting on the ship hull in level ice condition. The model is based on ice-hull collision mechanisms and the essential ice breaking characteristics. The two critical ice failure mo...

  • Article
  • Open Access
19 Citations
5,709 Views
11 Pages

Failure Trends of High-Voltage Porcelain Insulators Depending on the Constituents of the Porcelain

  • Simpy Sanyal,
  • Taeyong Kim,
  • Junsin Yi,
  • Ja-Bin Koo,
  • Ju-Am Son and
  • In-Hyuk Choi

19 January 2020

The aging of porcelain insulators is responsible for the failure of power utilities. Porcelain insulators from different places in South Korea, possessing various aging times and years of installation, have been investigated to carry out lifetime sta...

  • Article
  • Open Access
3 Citations
4,503 Views
16 Pages

A Division Algorithm in a Redundant Residue Number System Using Fractions

  • Nikolay Chervyakov,
  • Pavel Lyakhov,
  • Mikhail Babenko,
  • Irina Lavrinenko,
  • Maxim Deryabin,
  • Anton Lavrinenko,
  • Anton Nazarov,
  • Maria Valueva,
  • Alexander Voznesensky and
  • Dmitry Kaplun

19 January 2020

The residue number system (RNS) is widely used for data processing. However, division in the RNS is a rather complicated arithmetic operation, since it requires expensive and complex operators at each iteration, which requires a lot of hardware and t...

  • Article
  • Open Access
45 Citations
5,718 Views
18 Pages

19 January 2020

Aiming at the problems inherent in the traditional fuzzy energy management strategy (F-EMS), such as poor adaptive ability and lack of self-learning, a neural network fuzzy energy management strategy (NNF-EMS) for hybrid electric vehicles (HEVs) base...

  • Article
  • Open Access
62 Citations
12,273 Views
27 Pages

A Method for Detecting Coffee Leaf Rust through Wireless Sensor Networks, Remote Sensing, and Deep Learning: Case Study of the Caturra Variety in Colombia

  • David Velásquez,
  • Alejandro Sánchez ,
  • Sebastian Sarmiento ,
  • Mauricio Toro ,
  • Mikel Maiza and
  • Basilio Sierra 

19 January 2020

Agricultural activity has always been threatened by the presence of pests and diseases that prevent the proper development of crops and negatively affect the economy of farmers. One of these pests is Coffee Leaf Rust (CLR), which is a fungal epidemic...

  • Article
  • Open Access
16 Citations
5,858 Views
23 Pages

19 January 2020

The autonomous navigation of unmanned vehicles in GPS denied environments is an incredibly challenging task. Because cameras are low in price, obtain rich information, and passively sense the environment, vision based simultaneous localization and ma...

  • Feature Paper
  • Article
  • Open Access
45 Citations
6,769 Views
19 Pages

Global MPPT Based on Machine-Learning for PV Arrays Operating under Partial Shading Conditions

  • Christos Kalogerakis,
  • Eftichis Koutroulis and
  • Michail G. Lagoudakis

19 January 2020

A global maximum power point tracking (GMPPT) process must be applied for detecting the position of the GMPP operating point in the minimum possible search time in order to maximize the energy production of a photovoltaic (PV) system when its PV arra...

  • Article
  • Open Access
6 Citations
3,680 Views
22 Pages

19 January 2020

A flexible chassis (FC) is a type of electric vehicle driven by in-wheel motors that can be used in narrow conditions in agricultural facilities. The FC is composed primarily of four off-center steering mechanisms (OSMs) that can be controlled indepe...

  • Article
  • Open Access
6 Citations
2,683 Views
12 Pages

Structural Optimization of Slotting Nozzle Used to Improve Coal-Seam Permeability

  • Zhaolong Ge,
  • Jianyu Zhong,
  • Jianguo Zhang,
  • Yingwei Wang,
  • Youchang Lvu and
  • Sai Zhang

19 January 2020

Slotting directional hydraulic fracturing is a new method for improving permeability of a coal seam in underground coal mines that can solve problems related to non-uniform permeability enhancement in the seam. A slotting nozzle is the key to this te...

  • Article
  • Open Access
8 Citations
3,846 Views
8 Pages

Plasma Electrolysis Spraying Al2O3 Coating onto Quartz Fiber Fabric for Enhanced Thermal Conductivity and Stability

  • Aiming Bu,
  • Yongfu Zhang,
  • Yan Xiang,
  • Yunjie Yang,
  • Weiwei Chen,
  • Huanwu Cheng and
  • Lu Wang

19 January 2020

This manuscript reported the synthesis of Al2O3 coating onto quartz fiber fabric by plasma electrolysis spray for enhanced thermal conductivity and stability. The nano- and micro-sized clusters were partially observed on the coating, while most coati...

  • Article
  • Open Access
26 Citations
6,216 Views
15 Pages

19 January 2020

Because semiconductors absorb wavelengths dependent on the light absorption coefficient, photovoltaic (PV) energy output is affected by the solar spectrum. Therefore, it is necessary to consider the solar spectrum for highly accurate PV output estima...

  • Article
  • Open Access
14 Citations
4,392 Views
24 Pages

19 January 2020

The regulating performance degradation of the stepless capacity regulation system for reciprocating compressors occurs frequently in long-term operations. It affects the safe and stable operation of the compressor seriously. The degradation mechanism...

  • Article
  • Open Access
16 Citations
4,517 Views
18 Pages

19 January 2020

This paper proposes a machine-learning based reduced-order model that can provide fast and accurate prediction of the glottal flow during voice production. The model is based on the Bernoulli equation with a viscous loss term predicted by a deep neur...

  • Article
  • Open Access
20 Citations
7,205 Views
14 Pages

19 January 2020

We present the quantum-like model of information processing by the brain’s neural networks. The model does not refer to genuine quantum processes in the brain. In this model, uncertainty generated by the action potential of a neuron is represen...

  • Article
  • Open Access
29 Citations
5,844 Views
21 Pages

Numerical Study for the Effects of Temperature Dependent Viscosity Flow of Non-Newtonian Fluid with Double Stratification

  • Hafiz Abdul Wahab,
  • Hussan Zeb,
  • Saira Bhatti,
  • Muhammad Gulistan,
  • Seifedine Kadry and
  • Yunyoung Nam

19 January 2020

The main aim of the current study is to determine the effects of the temperature dependent viscosity and thermal conductivity on magnetohydrodynamics (MHD) flow of a non-Newtonian fluid over a nonlinear stretching sheet. The viscosity of the fluid de...

  • Article
  • Open Access
3 Citations
2,624 Views
14 Pages

19 January 2020

Rice husks as common agricultural remnants with low density and good thermal conductivity properties have been used in infill walls in the northern area of China. Accordingly, many tests and numerical simulations were conducted to address a difficult...

  • Article
  • Open Access
20 Citations
5,151 Views
13 Pages

19 January 2020

This paper deals with the robust control method for permanent magnet synchronous motor (PMSM) speed-regulation system based on active disturbance compensation. Different from the classical PMSM disturbance compensation scheme, a novel disturbance fee...

  • Article
  • Open Access
71 Citations
8,178 Views
19 Pages

Evaluation of Condition of Concrete Structures Using Ultrasonic Pulse Velocity Method

  • Seonguk Hong,
  • Sangki Yoon,
  • Jonghyun Kim,
  • Changjong Lee,
  • Seunghun Kim and
  • Yongtaeg Lee

19 January 2020

The purpose of this study is to estimate the compressive strength according to the age of the concrete structure using ultrasonic pulse velocity method. If the correlation between the ultrasonic pulse velocity and the compressive strength according t...

  • Article
  • Open Access
2 Citations
2,990 Views
16 Pages

18 January 2020

The life prediction is crucial to guarantee the reliability and safety of the mechanical system. The current prediction methods predict the life only based on the historical usage pattern of the mechanical system, and do not consider the mission prof...

  • Article
  • Open Access
12 Citations
5,115 Views
17 Pages

Evolving Matrix-Factorization-Based Collaborative Filtering Using Genetic Programming

  • Raúl Lara-Cabrera,
  • Ángel González-Prieto,
  • Fernando Ortega and
  • Jesús Bobadilla

18 January 2020

Recommender systems aim to estimate the judgment or opinion that a user might offer to an item. Matrix-factorization-based collaborative filtering typifies both users and items as vectors of factors inferred from item rating patterns. This method fin...

  • Article
  • Open Access
5 Citations
3,581 Views
16 Pages

18 January 2020

Applying computer vision to mobile robot navigation has been studied for over two decades. One of the most challenging problems for a vision-based mobile robot involves accurately and stably tracking a guide path in the robot limited field of view un...

  • Article
  • Open Access
12 Citations
3,750 Views
12 Pages

18 January 2020

The effects of operational conditions such as permeate recirculation velocity, mixing intensity, and trans-membrane temperature on the performances of hydrophobic polyethylene (PE) hollow-fiber membrane were investigated by operating the submerged di...

  • Article
  • Open Access
13 Citations
4,645 Views
19 Pages

18 January 2020

In the “full world” and Anthropocene, global ecological consumption is beyond natural capital’s regenerative and absorptive abilities, and ecological consumption of humanity has to be reduced to have an ecologically sustainable futu...

  • Article
  • Open Access
10 Citations
3,076 Views
19 Pages

18 January 2020

Cyclic void growth model (CVGM) and continuum damage mechanics (CDM) model are suitable for predicting the damage of ultra-low-cycle fatigue (ULCF) theoretically. However, studies on the prediction of ultra-low-cycle fatigue (ULCF) damage is lacking....

  • Article
  • Open Access
4 Citations
5,497 Views
14 Pages

18 January 2020

Materials used for creating fabrics featuring insulation and thermoregulation are typically made of multi-layer materials consisting of two outer layers and inner padding, traditionally made from goose or duck feathers or even with synthetic material...

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Appl. Sci. - ISSN 2076-3417