Nicolae Stelian Ungureanu

Scopus Publications

Analytical Research Regarding the Implementation of a Prescriptive Maintenance System Applied to IT&C Equipment
Ana-Diana Pop-Suărășan, Nicolae Stelian Ungureanu, Adrian Petrovan
Machines, 2025
In the era of digitalization, prescriptive maintenance and equipment condition monitoring are essential for ensuring the continuity of operations in various industries. The proposed software solution provides an integrated solution for monitoring and maintaining equipment, facilitating the collection, processing and interpretation of data related to their performance. Prioritization of prescriptive maintenance recommendations for alerts within the application is based on a set of well-defined criteria that integrate both the analysis of physical sensor data and computer logs. This is achieved through a hierarchical classification mechanism, combining predefined thresholds, prescriptive assessments and severity levels. The proposed project is a prescriptive equipment monitoring and maintenance application focused on the collection and analysis of sensor data to identify and prevent potential failures. The application structure integrates components such as data processing, machine learning, databases and recommendation generation, each of which has a specific role in the project workflow. The integration of sensor data and logs enhances robustness, scalability and efficiency, ensuring both high performance and adaptability to the varying needs of users. The proposed system processes and analyzes large data volumes. It combines threshold-based logic with machine learning to enhance adaptability.
Comparative Assessment of Tool Wear and Surface Topography After Superfinish Turning of Inconel 718 with Carbide and Ceramic Inserts
Piotr Szablewski, Stanisław Legutko, Nicolae Ungureanu, Jana Petru, Krzysztof Smak, et al.
Applied Sciences Switzerland, 2025
Cutting inserts made of ceramic materials are used in rough machining processes of Inconel 718. This article compares sintered carbide S205 inserts with 6160 ceramic inserts after finish turning of Inconel 718 with a hardness of 45 HRC. The evaluation focused on insert wear, surface topography and changes in cutting edge radius. The results show differences in the wear of S205 and 6160 inserts. S205 inserts characterize the formation of buildup on the rake face, while 6160 inserts tend to form buildup on the flank face. Furthermore, ceramic 6160 inserts are more prone to notch wear. Surface topography analysis revealed the formation of individual high peaks on surfaces machined with ceramic inserts. The Sa parameter for all cutting conditions studied did not exceed 0.45 µm.
Tribological Aspects Concerning the Study of Overhead Crane Brakes
Miorita Ungureanu, Nicolae Medan, Nicolae Stelian Ungureanu, Nicolae Pop, Krzysztof Nadolny
Materials, 2022
The aim of the study is the tribological analysis of the crane drum brakes. A theoretical analysis of the wear processes for brake lining was performed and the coefficient of friction under tribological conditions was determined experimentally simulating the operating conditions for three types of brakes. The theoretical study of the wear was oriented towards of determining the lifetime of the brake lining. In the experimental determination of the coefficient of friction, the following parameters were taken into account: the contact pressure between the shoe and the drum; the initial speed of the brake drum; the humidity of the working environment; and the temperature of the drum-brake lining friction surfaces. After performing the experiments, a statistical analysis was conducted, that shows the amount the coefficient of friction is influenced by the previously mentioned parameters: the highest weight was humidity with a value of 35.58%, followed by temperature with a percentage of 23.95%, velocity with 4.54%, and lastly pressure with 4.19%. Furthermore, the equation that expresses the dependence between the coefficient of friction and the parameters is determined. We consider that the results obtained are important for brake manufacturers in order to improve braking efficiency and the safety of overhead cranes.
DEVELOPMENT OF THE SYSTEM FOR CUTTING TOOL FLOWS MANAGEMENT IN A SMALL MANUFACTURING COMPANY
University of Novi Sad, Faculty of Technical Sciences, Novi Sad, Serbia, Dejan Lukić, Dejan Božić, University of Novi Sad, Faculty of Technical Sciences, Novi Sad, Serbia, Mijodrag Milošević, et al.
Advanced Engineering Letters, 2022
Information systems in small manufacturing companies can have a big impact on increasing economy and productivity. Due to limited human and financial resources, these companies generally use cheaper commercial solutions or develop specialized information system solutions that are adapted to their needs. In order to properly solve the problem of introducing an information system, a thorough analysis of information flows in the company and corresponding business processes is necessary. The main subject and goal of the research in this work is related to the investigation of time losses due to the absence of an information system from the aspect of managing the flow of cutting tools, as well as the presentation of the foundations for its development in a small manufacturing company.
Research regarding the energy recovery from municipal solid waste in maramures county using incineration
Miorita Ungureanu, Juhasz Jozsef, Valeria Mirela Brezoczki, Peter Monka, Nicolae Stelian Ungureanu
Processes, 2021
This paper presents a part of the study referring to exploring Energy Recovery from Municipal Solid Waste in Maramures County. In order to analyze the possibility of energetic recovery of municipal solid waste (MSW), data referring to the management system of MSW from Maramures county were cumulated and processed in a first stage in order to estimate the quantity of municipal solid waste and its composition, which might be recovered energetically. In the next stage, samples of municipal solid waste were collected from landfills, which were submitted to specific processing and analyses. The experimental data were processed and in the end the energy potential of municipal solid waste from Maramures county was found. This study will help stakeholders and those involved in waste management to assess the possibility of energy recovery. The analysis of the study concluded that municipal solid waste in Maramures County is a potential source of renewable energy.
Nano Particles as Lubricant Additive: A Concise Review
Roberto D’Amato, Alessandro Ruggiero, Petr Valašek, Nicolae Ungureanu
Lecture Notes in Mechanical Engineering, 2021
Friction Comparison on Tribological Pairs HXLPE/Ti6Al4V Alloy and VE-HXLPE/Ti6Al4V Alloy Under Dry and Physiological Lubricated Conditions
Alessandro Ruggiero, Roberto D’Amato, Nicolae Ungureanu, Saverio Affatato
Lecture Notes in Mechanical Engineering, 2021
Design and Verification of an Acoustic Mitigation Intervention for an Air-Cooled Inverter Heat Pump: A Case Study
Alessandro Ruggiero, Domenico Russo, Roberto D’Amato, Nicolae Ungureanu
Lecture Notes in Mechanical Engineering, 2021
Sustainability of the Production Process by Applying Lean Manufacturing Through the PDCA Cycle – A Case Study in the Machinery Industry
Marko Milosevic, Marko Djapan, Roberto D’Amato, Nicolae Ungureanu, Alessandro Ruggiero
Lecture Notes in Mechanical Engineering, 2021
Wear of three-treads uncoated and coated integral hob milling tools
S Sovilj-Nikić, B Sovilj, G Varga, N Ungureanu
Iop Conference Series Materials Science and Engineering, 2020
Tribological Processes in the gear cutting of cylindrical gears on cutting elements of hob milling tools develop under specific conditions. The particular requirements under which the contacts between the hob milling tools and the workpiece material are made, make it difficult to become familiar with the tribological processes on them so that today there is more knowledge about their consequences on the machined surface of the teeth and the cutting elements of the hob milling tool, and less about their nature. In this paper, based on the experimental investigations, the wear analysis of three-treads uncoated and coated integral hob milling tools in the gear cutting of cylindrical gears is given.
Musculoskeletal multibody simulations for the optimal tribological design of human prostheses: The case of the ankle joint
A Ruggiero, R D’Amato, N Ungureanu
Iop Conference Series Materials Science and Engineering, 2020
A texture based descriptors used for real time tool condition monitoring
A Antic, M Milosevic, R Cep, N Ungureanu
Iop Conference Series Materials Science and Engineering, 2020
Preface
Iop Conference Series Materials Science and Engineering, 2020
Thermal analysis of the industrial shoe brakes to reduce the risk of failure during braking
Mioriţa Ungureanu, Nicolae Ungureanu, Marius Cosma
Archives of Mining Sciences, 2020
Intelligent process planning for smart factory and smart manufacturing
Mijodrag Milošević, Mića Đurđev, Dejan Lukić, Aco Antić, Nicolae Ungureanu
Lecture Notes in Mechanical Engineering, 2020
Analysis of tribological damages of plain bearings
S Sovilj-Nikić, B Sovilj, G Varga, R Antunović, N Ungureanu
Iop Conference Series Materials Science and Engineering, 2019
Fluid film pressure description in finite turbulent lubricated journal bearings by using the warner’s theory
Alessandro Ruggiero, Roberto D’Amato, Nicolae Ungureanu
Lecture Notes in Mechanical Engineering, 2019
Contributions to the development of an ontology in logistics of manufacturing
Nicolae Stelian Ungureanu, Adrian Petrovan, Miorita Ungureanu
Lecture Notes in Mechanical Engineering, 2019
Measurements of the friction coefficient: Discussion on the results in the framework of the time series analysis
Alessandro Ruggiero, Roberto D’Amato, Roque Calvo, Petr Valašek, Nicolae Ungureanu
Lecture Notes in Mechanical Engineering, 2019
Data network related to an object manufacturing inside of exerted Intelligent System
Katarina Monkova, Peter Monka, Miorita Ungureanu, Nicolae Ungureanu, Oleksandr Gusak, et al.
Eai Endorsed Transactions on Industrial Networks and Intelligent Systems, 2019
Modal Analysis as a Tool of Problem Identification of Gear Mechanism
Katarina Monkova, Peter Monka, Miorita Ungureanu, Nicolae Ungureanu
Proceedings of 2018 9th International Conference on Mechanical and Aerospace Engineering Icmae 2018, 2018
Analysis of the tool life of coated hob milling tools for gear cutting of cylindrical gear
Sandra Sovilj-Nikić, Bogdan Sovilj, Gyula Varga, Nicolae Ungureanu, Vladimir Blanuša
Matec Web of Conferences, 2018
The effect of active surface morphology of grinding wheel with zone-diversified structure on the form of chips in traverse internal cylindrical grinding of 100Cr6 steel
Krzysztof Nadolny, Wojciech Kapłonek, Grzegorz Królczyk, Nicolae Ungureanu
Proceedings of the Institution of Mechanical Engineers Part B Journal of Engineering Manufacture, 2018
Dependence of surface roughness on depth of cut for aluminum alloy AlCu4Mg1
Dusan Mital, Michal Hatala, Andrej Bernat, Andrej Czan, Jaroslav Vybostek, et al.
Manufacturing Technology, 2018
Optical and electron microscopy investigation of damaged storz firehose couplings microstructure
Cornel Băbuţ, Nicolae Ungureanu, Gheorghe Iepure
Materials Science Forum, 2018
Tool condition monitoring system based on a texture descriptors
University of Novi Sad, Faculty of Technical Sciences, Aco Antić, Milan Zeljković, University of Novi Sad, Faculty of Technical Sciences, Nicolae Ungureanu, et al.
International Journal of Industrial Engineering and Management, 2018
Wear intensity of mine hoist brake materials
Mioriţa Ungureanu, Nicolae Ungureanu
Tehnicki Vjesnik, 2017
Study on friction behaviour of brake shoe materials for mining hoist
M Ungureanu, N S Ungureanu, I Crăciun
Iop Conference Series Materials Science and Engineering, 2017
Functioning condition monitoring of industrial equipment
N S Ungureanu, A Petrovan, M Ungureanu, M Alexandrescu
Iop Conference Series Materials Science and Engineering, 2017
Research on fire hose couplings damages
C Babut, N Ungureanu, M Ungureanu
Iop Conference Series Materials Science and Engineering, 2017
A novel fully fast recovery EMG amplifier for the control of neural prosthesis
V. Ilić, Nikola Jorgovanović, Aco Antić, Slobodan Morača, Ungureanu, Nikolae
Tehnicki Vjesnik, 2016
Innovation and technology transfer for business development
Mioriţa Ungureanu, Nicolae Pop, Nicolae Ungureanu
Procedia Engineering, 2016
Comparative Study Between The Alternative Used By The IMP Type Pecussion Drills And The Version Using Fluid Elements Regarding The Supplying, Command And Automatic Adjustment Systems Of The Injection Water Pressure
Adriana Cotetiu, Radu Cotetiu, Nicolae Ungureanu
Archives of Mining Sciences, 2015
Using Edgecam for creating CNC programs in education process
Frantisek Botko, Michal Hatala, Miroslav Kormos, Nicolae Ungureanu, Peter Soltes
Sami 2015 IEEE 13th International Symposium on Applied Machine Intelligence and Informatics Proceedings, 2015
Research about automatic adjustment solution of the advance force at the perffusion drills using fluid elements
Adriana Cotetiu, Radu Cotetiu, Nicolae Ungureanu
Archives of Mining Sciences, 2013
Contributions regarding, the mining drilling tribo-system
Archives of Mining Sciences, 2011
Transfer matrix method for orthotropic cylindrical shells with variable wall thickness
Proceedings of the Romanian Academy Series A Mathematics Physics Technical Sciences Information Science, 2010
Implementing ieee 1451-based sensor for natural disaster monitoring
Annals of Daaam and Proceedings of the International Daaam Symposium, 2010
Computer model for sieves' vibrations analysis, using an algorithm based on the false-position method
Dinu I. Stoicovici, Miorita Ungureanu, Nicu Ungureanu, Mihai Banica
American Journal of Applied Sciences, 2009
Experimental aspects regarding pressure determination to the narrow sliding radial bearing (L/D < 0,6) working under hard shocks
Annals of Daaam and Proceedings of the International Daaam Symposium, 2009
Evaluation of maintenance systems
Annals of Daaam and Proceedings of the International Daaam Symposium, 2008
Technical development program with friendly materials
Annals of Daaam and Proceedings of the International Daaam Symposium, 2008

RECENT SCHOLAR PUBLICATIONS

OPTIMIZING PREDICTIVE MAINTENANCE FOR MAINTENANCE MANAGEMENT DEVELOPMENT: A HYBRID APPROACH USING VIBRATION AND SHOCK-PULSE MONITORING
G GOMES, NS UNGUREANU, G KALACSKÁ
Review of Management and Economic Engineering 24 (4), 260-271 , 2025
2025
Citations: 1
OCCUPATIONAL HEALTH AND SAFETY (OHS) CHALLENGES IN THE MAINTENANCE FOR INDUSTRY 5.0
NS UNGUREANU, M UNGUREANU, M BANICA
ACTA TECHNICA NAPOCENSIS-Series: APPLIED MATHEMATICS, MECHANICS, and … , 2025
2025
EXPERIMENTAL VALIDATION TECHNIQUES SPECIFIC TO AUTOMATED MAINTENANCE PROCESSES
AD Pop-Suărășan, NS Ungureanu
Journal on Emerging Topics in Industrial Engineering, ISSN: 2960-5407 (Online) , 2025
2025
Analytical Research Regarding the Implementation of a Prescriptive Maintenance System Applied to IT&C Equipment
AD Pop-Suărășan, NS Ungureanu, A Petrovan
Machines 13 (5), 412 , 2025
2025
Citations: 1
Comparative assessment of tool wear and surface topography after superfinish turning of Inconel 718 with carbide and ceramic inserts
P Szablewski, S Legutko, N Ungureanu, J Petru, K Smak, B Krawczyk
Applied Sciences 15 (8), 4265 , 2025
2025
Citations: 4
FAILURE FORECASTING-INTELLIGENT SOFTWARE AGENTS IN THE CONTEXT OF INDUSTRY 4.0
POPS Ana-Diana, N UNGUREANU
Review of Management and Economic Engineering 23 (3), 199-206 , 2024
2024
AN ANALYSIS OF INNOVATION OF THE DIGITALIZATION PROCESS FOR THE DEVELOPMENT OF PRESCRIPTIVE MAINTENANCE PLANS
POPS Ana-Diana, NS UNGUREANU
ACTA TECHNICA NAPOCENSIS-Series: APPLIED MATHEMATICS, MECHANICS, and … , 2024
2024
THE IMPLICATIONS OF IoT STRUCTURES IN PRESCRIPTIVE MAINTENANCE
AD Pop-Suărășan, NS Ungureanu
Journal on Emerging Topics in Industrial Engineering, ISSN: 2960-5407 (Online) , 2024
2024
THERMAL ANALYSIS OF DISC BRAKE USING FINITE ELEMENT METHOD.
C DARABA, NS UNGUREANU, D DARABA
Buletinul AGIR 29 (2) , 2024
2024
Process optimization through advanced technologies.
AM Savu, NS Ungureanu
Scientific Bulletin Series C: Fascicle Mechanics, Tribology, Machine … , 2024
2024
Experimental research methodology for testing DLC-coated milling tools used in machining parts in the aeronautical industry.
NI Pasca, M Banica, M Cosma, N Ungureanu, V Nasui
Scientific Bulletin Series C: Fascicle Mechanics, Tribology, Machine … , 2024
2024
THE LONG-TERM EFFECTS OF TECHNOLOGY DIFFUSION
RF DRENȚA, NS UNGUREANU
Review of Management and Economic Engineering 22 (4), 277-286 , 2023
2023
THE IMPLICATIONS IMPOSED BY PRESCRIPTIVE MAINTENANCE IMPLEMENTATION INTO THE INDUSTRY 4.0-A CURRENT STATE ANALYSIS
POPS Ana-Diana, NS UNGUREANU
ACTA TECHNICA NAPOCENSIS-Series: APPLIED MATHEMATICS, MECHANICS, and … , 2023
2023
MAINTENANCE DEVELOPMENT IN RELATION TO THE EVOLUTION OF CURRENT TECHNOLOGICAL PROCESSES
POPS Ana-Diana, N UNGUREANU
Review of Management and Economic Engineering 22 (2), 144-154 , 2023
2023
Closing the Gap between Relationship Marketing, Customer Relationship Management and Customer Complaint Management.
D Manoliu, NS Ungureanu
Scientific Bulletin Series C: Fascicle Mechanics, Tribology, Machine … , 2023
2023
Citations: 5
Complaint Management in the Manufacturing Industry
D Manoliu, NS Ungureanu
Scientific Bulletin Series C: Fascicle Mechanics, Tribology, Machine … , 2023
2023
Tribological aspects concerning the study of overhead crane brakes
M Ungureanu, N Medan, NS Ungureanu, N Pop, K Nadolny
Materials 15 (19), 6549 , 2022
2022
Citations: 14
RISKS MANAGEMENT-EVALUATION AND MINIMIZATION. SCREENING ARTICLE
POP Călin-Dumitru, RF DRENŢA, NS UNGUREANU
Review of Management and Economic Engineering 21 (2), 176-184 , 2022
2022
Development of the system for cutting tool flows management in a small manufacturing company
D Lukić, D Božić, M Milošević, N Ungureanu, S Borojević, A Antić
Adv. Eng. Lett 1, 88-97 , 2022
2022
Citations: 4
Barometer for Identifying and Measuring Economic and Financial Risks
D Călin, V BÎRLE, N UNGUREANU
2021

MOST CITED SCHOLAR PUBLICATIONS

Innovation and technology transfer for business development
M Ungureanu, N Pop, N Ungureanu
Procedia Engineering 149, 495-500 , 2016
2016
Citations: 71
Sustainability of the production process by applying lean manufacturing through the PDCA cycle–a case study in the machinery industry
M Milosevic, M Djapan, R D’Amato, N Ungureanu, A Ruggiero
International Conference on Manufacturing Engineering and Materials, 199-211 , 2021
2021
Citations: 24
Development of Progressive Technologies-Computer Support for Progressive Technologies
I Kuric, J Novák-Marcinčin, R Cotetiu, N Ungureanu
International DAAAM Vienna, 253 , 2007
2007
Citations: 23
Computer model for sieves' vibrations analysis, using an algorithm based on the false-position method
DIA Stoicovici, M Ungureanu, N Ungureanu, M Banica
American journal of applied sciences 6 (1), 48 , 2009
2009
Citations: 18
New trends in mechanical design and technologies
RI Coteţiu, I Kuric, J Novák-Marcinčin, NS Ungureanu
Risoprint , 2005
2005
Citations: 18
The effect of active surface morphology of grinding wheel with zone-diversified structure on the form of chips in traverse internal cylindrical grinding of 100Cr6 steel
K Nadolny, W Kapłonek, G Królczyk, N Ungureanu
Proceedings of the Institution of Mechanical Engineers, Part B: Journal of … , 2018
2018
Citations: 15
Fiabilitate si diagnoza
NS Ungureanu
Risoprint , 2003
2003
Citations: 15
Tribological aspects concerning the study of overhead crane brakes
M Ungureanu, N Medan, NS Ungureanu, N Pop, K Nadolny
Materials 15 (19), 6549 , 2022
2022
Citations: 14
Intelligent process planning for smart factory and smart manufacturing
M Milošević, M Đurđev, D Lukić, A Antić, N Ungureanu
Proceedings of 5th International Conference on the Industry 4.0 Model for … , 2020
2020
Citations: 13
Measurements of the friction coefficient: Discussion on the results in the framework of the time series analysis
A Ruggiero, R D’Amato, R Calvo, P Valašek, N Ungureanu
Advances in Manufacturing Engineering and Materials: Proceedings of the … , 2018
2018
Citations: 11
Principles of the maintenance management
N Ungureanu, M Ungureanu, A Cotetiu, B Barisic, S Grozav
Scientific Bulletin Series C: Fascicle Mechanics, Tribology, Machine … , 2010
2010
Citations: 11
Research regarding the energy recovery from municipal solid waste in maramures county using incineration
M Ungureanu, J Jozsef, VM Brezoczki, P Monka, NS Ungureanu
Processes 9 (3), 514 , 2021
2021
Citations: 10
Using Edgecam for creating CNC programs in education process
F Botko, M Hatala, M Kormoš, N Ungureanu, P Šoltés
2015 IEEE 13th International Symposium on Applied Machine Intelligence and … , 2015
2015
Citations: 9
System of Predictive Maintenance.
N Ungureanu, M UNGUREANU
Scientific Bulletin Series C: Fascicle Mechanics, Tribology, Machine … , 2015
2015
Citations: 8
Integrating risk analysis with safety dyagnostic in complex industrial systems: modeling hazard
CL Ionel, MR Iosif, BG Bujor, UN Stelian
2015
Citations: 8
An experimental approach to optimize the screening in the real operating conditions
DI Stoicovici, M Ungureanu, N Ungureanu, M Bănică
Manufacturing Engineering 2, 75-78 , 2008
2008
Citations: 8
Logistica activităţilor de mentenanţă
NS Ungureanu, P Duval, M Mocan, IM Tăucean
Editura Universităţii de Nord , 2010
2010
Citations: 7
Theoretical correlations regarding the instantaneous carrying force in the case of the narrow sliding radial HD working bearing under hard shocks
IM Alexandrescu, R Cotetiu, N Ungureanu
Automation in Production Planning and Manufacturing. 8th International … , 2007
2007
Citations: 7
Study on friction behaviour of brake shoe materials for mining hoist
M Ungureanu, NS Ungureanu, I Crăciun
IOP Conference Series: Materials Science and Engineering 174 (1), 012016 , 2017
2017
Citations: 6
Research about automatic adjustment solution of the advance force at the perffusion drills using fluid elements
A Cotetiu, R Cotetiu, N Ungureanu
Archives of Mining Sciences 58 (4) , 2013
2013
Citations: 6

Nicolae Stelian Ungureanu

RESEARCH, TEACHING, or OTHER INTERESTS

Scopus Publications

RECENT SCHOLAR PUBLICATIONS

MOST CITED SCHOLAR PUBLICATIONS