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In this issue

Usage of Light-Emitting Diode Lighting and Visible Light Communication Technology for Temperature Control
Svetlana Grigoryeva, Alexander Baklanov, Aslima Alimkhanova, Alexander Dmitriev, György Györök
DOI: 10.12700/APH.18.4.2021.4.1

Design of Multidimensional Classifiers using Fuzzy Brain Emotional Learning Model and Particle Swarm Optimization Algorithm
Yuan Sun, Chih-Min Lin
DOI: 10.12700/APH.18.4.2021.4.2

Methodology for the Water Injection System Design Based on Numerical Models
Miroslav Spodniak, Ladislav Főző, Rudolf Andoga, Karol Semrád, Károly Beneda
DOI: 10.12700/APH.18.4.2021.4.3

Cavitation Measurement in a Centrifugal Pump
Nikolett Fecser, István Lakatos
DOI: 10.12700/APH.18.4.2021.4.4

Identifying the Possibilities for Superior Recovery by Pelletization of Industry Related Small and Powdery Iron Containing Waste
Sorina Gabriela Serban, Imre Kiss
DOI: 10.12700/APH.18.4.2021.4.5

A Genetic Algorithm for the Minimum Vertex Cover Problem with Interval-Valued Fitness
Benedek Nagy, Péter Szokol
DOI: 10.12700/APH.18.4.2021.4.6

Bus Transport Process Networks with Arbitrary Launching Times
Zsolt Ercsey, Albert Nagy, József Tick, Zoltán Kovács
DOI: 10.12700/APH.18.4.2021.4.7

Possible Methods for Combining Tongue Contours of Dynamic MRI and Ultrasound Records
Réka Trencsényi and László Czap
DOI: 10.12700/APH.18.4.2021.4.8

Proactive Maintenance Model Based on the Law on Change of Mechanical Vibration
Goran Otić, Goran Jovanov, Živoslav Adamović, Nemanja Jovanov, Stevo Jaćimovski
DOI: 10.12700/APH.18.4.2021.4.9

Accurate Calculation of Stratified Ground Low-Frequency Return Impedance
Karolina Kaszás-Lažetić, Dragan Kljajić, Nikola Djurić and Miroslav Prša
DOI: 10.12700/APH.18.4.2021.4.10

Practical Application Possibilities for 3D Models Using Low-resolution Thermal Images
András Molnár, István Lovas, Zsolt Domozi
DOI: 10.12700/APH.18.4.2021.4.11

Three-Dimensional Modeling and Analysis of Mechanized Excavation for Tunnel Boring Machines
Danial Mohammadzadeh S., Nader Karballaeezadeh, Amirhossein Sanaei Zahed, Amir Mosavi, Felde Imre
DOI: 10.12700/APH.18.4.2021.4.12

A denotational semantics of a concatenative/compositional programming language
Jurij Mihelic, William Steingartner, Valerie Novitzká
DOI: 10.12700/APH.18.4.2021.4.13