Theses (Department of Engineering Management and Enterprise)
Állandó link (URI) ehhez a gyűjteményhez
Theses collection of the Department of Engineering Management and Enterprise. The collection was started in 2023.
At the University of Debrecen, in accordance with the 2022 amendment to the 2011 Higher Education Act, student theses are only accessible from devices connected to the University's Eduroam WiFi network or from a university IP address.
“The thesis or diploma work of a student who has successfully passed the final examination shall be stored in full in the academic system of the higher education institution, and a record shall be maintained thereof. The stored theses and diploma works – with the exception of parts classified as confidential in accordance with the relevant legislation – must be made accessible and searchable without restriction through the academic system.” Further info on the National Higher Education Act in Hungarian: Felsőokt. tv. (új) - 2011. évi CCIV. törvény a nemzeti felsőoktatásról - Hatályos Jogszabályok Gyűjteménye.
Böngészés
legfrissebb feltöltések
Megjelenítve 1 - 20 (Összesen 107)
Tétel Korlátozottan hozzáférhető Lean Manufacturing Implementation in a Frozen Corn Packaging Line: Bottleneck Elimination and Waste ReductionFajraoui, Lobna; Mátrai, Norbert Zoltán; DE--Műszaki KarThis thesis investigated the frozen corn packaging process using Lean manufacturing principles with the objective of identifying inefficiencies and improving overall process performance. A current-state value stream map was developed based on Gemba observations, revealing significant wastes related to transport, waiting, excess inventory, and manual inspection. Based on the analysis, a future-state process was proposed, including layout integration of tote preparation and packaging, automation at the feeding station, and an upgraded camera system. These improvements enabled the elimination of forklift transport, manual inspection, and FIFO conveyor buffers, resulting in a significantly simplified and more stable process flow. The results demonstrate that targeted Lean interventions supported by automation can substantially improve flow efficiency, reduce labour dependency, and enhance overall process performance.Tétel Korlátozottan hozzáférhető Business Plan for a Sheep Wool Fertilizer Manufacturing Start-Up in MongoliaMunkh-Od, Erdenesuren; Jenei, Tünde Katalin; DE--Műszaki KarMongolia’s livestock industry is vital to its economy, yet low-grade sheep wool remains underused despite its potential for organic fertilizer production. The country’s reliance on imported chemical fertilizers increases vulnerability to currency and trade risks. This study evaluates the financial feasibility of establishing a sheep wool fertilizer company through cost, revenue, and risk analysis. The project aims to support rural development, reduce import dependence, and create a sustainable, profitable business. The thesis includes a financial model, scenario analysis, and funding strategy, structured across literature review, methodology, business planning, and conclusion chapters.Tétel Korlátozottan hozzáférhető Life Cycle Analysis and Health Monitoring of Power Transformers by Transformer Oil and Gas DiagnosticsPATANVADIYA, SUMITKUMAR KANUBHAI; Buri , Zsolt; DE--Műszaki KarThe thesis provides a clear and thorough analysis of transformer health monitoring using Dissolved Gas Analysis (DGA) and Oil Quality Analysis (OQA). It effectively explains common transformer failure causes and highlights how diagnostic techniques can detect faults early. The study uses real field data, standard testing methods, and graphical tools such as the Duval Triangle to interpret transformer conditions. Your results show how trends in gas and oil parameters help predict ageing, insulation degradation, and potential failures. Overall, the thesis contributes valuable insights for improving transformer reliability and supporting condition-based maintenance strategies.Tétel Korlátozottan hozzáférhető Preparation of Complex Polysaccharide Solid Foam with Gastro-Retentive Properties for Effective Drug DeliveryBou Akl, Mouawad; Budai, István; DE--Műszaki KarThe objective of this study is to create a stable, porous polysaccharide-based foam for the innovative incorporation of pharmaceutical ingredients. A large focus is to understand how these foams work for introducing drug compounds for real-world applications. To achieve this, selecting suitable polysaccharides and excipients for foam formulation, applying ultrasonic batch foaming to generate stable, lightweight structures, characterizing the resulting foams in terms of density, porosity, mechanical stability, and water absorption, and evaluating their potential as drug carriers based on the physical parameters achieved will be undergoneTétel Korlátozottan hozzáférhető Optimizing Microwave Transmission for 6G Networks: Advanced Techniques for Enhanced Air Interface PerformanceRizwan, Rasool; Buri , Zsolt; DE--Műszaki KarIn the Filed of IT and Mobile Communications, there is huge demand of growing Data Rates and low latency in Communication Networks. In ref to the on going Research in the Next Generation Networks and practical field Experiences, I have analyzed Several Techniques, made own point view and proposed Recommendations that in which aspects and dimensions we can more focus to obtain the desired results for enhancing air-interface performance in future 6G networks. It built the analysis base of cellular evolution from 2G to 5G to identify current microwave transmission limitations and the upcoming performance demands of 6G, including high data rates, low latency and increased capacity.Tétel Korlátozottan hozzáférhető The Impact of BIM in Building Construction and the Corresponding Low Adoption Rate in Developing MarketsSayegh, Nour; T. Kiss, Judit; DE--Műszaki KarThe aim of this thesis is to identify the reasons behind the limited adoption of Building Information Modeling (BIM) and to evaluate its impact on project performance in terms of quality, cost, and schedule. Additionally, the study examines how BIM contributes to sustainability throughout the construction process and What can help enhance and increase the use of BIM? .Tétel Korlátozottan hozzáférhető Relationship between servant leadership style and emotional intelligenceBattsengel, Sugarmaa; Matkó, Andrea Emese; DE--Műszaki KarA quantitative-correlational method was used to examine the relation between emotional intelligence and the servant leadership style. Data were collected through online questionnaires from 93 respondents working in the Mongolian construction business. The Wong and Law Emotional Intelligence Scale was used alongside a validated Servant Leadership Questionnaire, and the analyses were conducted using SPSS software. Results pointed positive correlation between emotional intelligence and servant leadership. The study also tested the moderating influences of gender and years of experience but did find no significant moderation on the relationship between emotional intelligence and the servant leadership style. Future researchers are encouraged to study other possible moderating variables, such as organizational culture, or extend this type of study to different industries and regions.Tétel Korlátozottan hozzáférhető Optimizing the Raw Material Picking Process: A Case Study in the Thyssenkrupp WarehosueGhanem, Kahtan; Buri, Zsolt; Sipos, Csanád; DE--Műszaki KarThis thesis applies lean management and ABC analysis to optimize raw materials transportation within the Thyssenkrupp warehouse in Debrecen, Hungary, focusing on improving the efficiency of the picking process. Growing global competition has led to the need for warehouse process enhancements. By applying lean manufacturing tools such as Value Strem Mapping (VSM), the PDCA cycle, root cause analysis and ABC analysis to this study we identified major inefficiencies related to material placement, travel distances, and storage management. Through detailed field observations, warehouse data analysis, and close collaboration with staff, the research highlights that 55% of materials were incorrectly placed, causing excessive picking time and unnecessary movement. Proposed countermeasures included reorganizing materials based on picking frequency and optimizing storage locations, resulting in reduced travel time and improved workflow. Initial improvements showed measurable gains in picking speed.Tétel Korlátozottan hozzáférhető Three Pillars of Corporate Social Responsibility (CSR): Green Leadership, Green Employee Behavior, and Green TechnologyTukyei, Gulmaral; Matkó, Andrea Emese; DE--Műszaki KarThis thesis explores how Green Leadership (GL), Green Employee Behavior (GEB), and Green Technology (GT) influence Corporate Social Responsibility (CSR) outcomes across economic, environmental, and social dimensions. While prior studies examined these elements separately, this research investigates their combined impact through Structural Equation Modeling (SEM) method, using a quantitative survey administered to 102 professionals. Results show that GEB and GT have significant positive effects on CSR outcomes, while GL has a positive but statistically insignificant impact. This implies that green leadership by itself will not necessarily enhance CSR outcomes unless complemented by employees' commitment to pro-environmental behavior and eco-friendly technology. The proposed structural model accounts for 61% of the variance in CSR outcomes, emphasizing the importance of a holistic approach. This thesis offers practical insights for companies aiming to improve their sustainability performance by integrating green innovation, employee engagement, and strategic leadership.Tétel Korlátozottan hozzáférhető Warehouse Space OptimizationMeoya, Jannatul; Kiss, Szabolcs; Sipos, Csanád; DE--Műszaki KarWarehouses are strategic logistics hubs in the competitive automotive sector, where space optimisation of storage is critical without physical extension to meet rising capacity. This mixed-method study at ThyssenKrupp Hungary identifies challenges: 40-45% underused vertical space due to cracked floors, modern 360° (multidirectional) forklifts enabling narrower aisles and extra shelves, and 23 pallet types causing complexity (standardizing to 10 groups). Solutions align with Industry 4.0, IoT, and WMS, boosting capacity and cutting costs. Recommendations include AGVs, simulations, staff training, and EV readiness for sustained efficiency.Tétel Korlátozottan hozzáférhető Factors Affecting Renewable Energy Consumption in EuropeHanoush, Elias; T. Kiss, Judit Gabriella; DE--Műszaki KarThis thesis investigates the key factors influencing renewable energy consumption across 21 European countries from 2013 to 2022. With rising concerns about climate change, resource depletion, and the transition away from fossil fuels, understanding the various drivers of renewable energy adoption has become essential. The study examines the impact of electricity prices, GDP per capita, foreign direct investment (FDI), urbanization, and gas prices on renewable energy usage. Using panel data analysis, including Pooled Ordinary Least Squares (POLS), Fixed Effects Model (FEM), and Random Effects Model (REM), the research analyzes both the entire sample and subgroups categorized by GDP levels. The findings highlight that urbanization and gas prices are significant determinants of renewable energy adoption, particularly in low- and high-GDP countries, respectively. The results emphasize the need for targeted policies that consider country-specific economic structures and development levels to effectively support the shift toward sustainable energy systems.Tétel Korlátozottan hozzáférhető Supply Chain ManagementMoskvitin, Artem; Buri, Zsolt; DE--Műszaki KarThis thesis investigates six critical challenges in modern industrial supply chains, including lack of coordination, increased risks, poor efficiency, failed SCIS implementations, cargo loss, and storage shortages. Using real-world data from a production facility, the study analyzes root causes and proposes practical solutions such as digital platforms, strategic risk management, logistics optimization, and warehouse automation. Emphasis is placed on IT integration and human factors in change management. The results offer valuable guidance for manufacturers aiming to enhance supply chain reliability, reduce costs, and boost competitiveness.Tétel Korlátozottan hozzáférhető Quality Management Bibliometric Analysis and VisualizationAljoab , Mohsen Saeed Mohammed; Buri , Zsolt; DE--Műszaki KarThis study examines the evolution of Quality Management Systems (QMS) into Quality 4.0, which integrates digital technologies like AI, IoT, and big data analytics. Using bibliometric analysis of research from 2020 to 2025, data from Scopus was analyzed with VOSviewer and CiteSpace to identify key trends and relationships. Results show a strong focus on technology integration within quality management, highlighted by clusters on AI in manufacturing, sustainable TQM, and digital supply chains. Despite the progress, gaps remain such as limited global diversity, few empirical case studies, and incomplete integration of digital tools into existing QMS. The research suggests updating standards like ISO 9001 to better align with digital transformation and emphasizes studying the impact of technology on workers. Overall, Quality 4.0 represents a major shift towards real-time, automated quality systems, combining human and AI collaboration. This analysis provides valuable insights into current trends and future research directions in quality management.Tétel Korlátozottan hozzáférhető How Hungary Can Utilize Green Hydrogen for Steelmaking: Insights from GermanyAl Boshi, Alaa; Máté, Domicián; DE--Műszaki KarThe global pursuit of decarbonization has positioned green hydrogen as a cornerstone of sustainable industrial transformation, particularly in hard-to-abate sectors such as steel production. Green hydrogen, generated via electrolysis powered by renewable energy, offers a zero-emission alternative to fossil fuels and is central to climate strategies across the EU. However, scaling up its use requires addressing significant logistical, economic, and technical challenges in transport, storage, and supply chain integration. This thesis explores the sustainability and practicality of green hydrogen logistics in steelmaking, drawing insights from innovative initiatives in Germany and Sweden, particularly the HYBRIT project, and examining their relevance to Hungary's industrial landscape. A techno-economic analysis assesses the Levelized Cost of Hydrogen (LCOH) in both Germany and Hungary, pinpointing essential cost factors like electricity rates, electrolyzer performance, and infrastructure expenditures. Additionally, a streamlined life cycle assessment evaluates the potential carbon emissions reductions that can be achieved through the adoption of green hydrogen in steel production. The research examines hydrogen storage techniques, including compressed gas, liquid hydrogen (LH₂), and liquid organic hydrogen carriers (LOHCs), alongside transport methods like pipelines and cryogenic trucking. It evaluates their scalability, efficiency, and safety. Results suggest that while LOHCs and pipelines present good options for long-distance transport, LH₂ brings technical and economic challenges because of its cryogenic needs. The analysis emphasizes compressed gas as a cost-effective temporary solution, particularly in the initial stages of infrastructure development. Ultimately, the thesis provides tailored recommendations for Hungary, advocating policy incentives, infrastructure planning, and industrial collaboration to establish a cost-effective, low-carbon hydrogen supply chain. The research contributes to the discourse on industrial decarbonization by outlining a feasible path for integrating green hydrogen into steelmaking, thereby supporting Hungary's energy transition goals and aligning with broader EU climate targets.Tétel Korlátozottan hozzáférhető Examination of Macroeconomic Factors That Impact the Spread of Electric VehiclesBen Abdallah, Hazem; T. Kiss, Judit Gabriella; DE--Műszaki KarThis thesis examines the macroeconomic factors influencing electric vehicle (EV) adoption across a diverse set of developed and developing countries between 2010 and 2023. Using both linear and log-log regression models, it evaluates the effects of GDP per capita, FDI, urbanization, renewable energy use, CO₂ emissions, and government incentives on EV registration rates. The study finds that while linear models offer a basic understanding, log-log models provide more meaningful economic insights by capturing elasticities. Notably, the inclusion of government incentives significantly improved model performance, with the log-log model achieving an R² of 0.827. GDP per capita and renewable energy consumption emerged as the most consistent and significant predictors. In contrast, the impact of urbanization, CO₂ emissions, and policy incentives varied depending on country context. The research highlights a pronounced disparity between developed and developing nations in their readiness for EV adoption, driven by differences in institutional capacity and infrastructure. Overall, the study offers valuable insights for policymakers and underscores the importance of tailored strategies to support a sustainable and inclusive EV transition.Tétel Korlátozottan hozzáférhető The Role of Artificial Intelligence in Automating Lead GenerationImanolinov, Dastan; Matkó , Andrea Emese; DE--Műszaki KarThis thesis provides a thorough examination of how AI can automate and optimize lead generation processes in marketing, especially in social selling. Using the Event-Processing Chain framework, this thesis effectively points out where AI tools like GPT-4 and Salesforce Einstein can reduce manual tasks and increase efficiency. The integration of real-world examples and AI-powered platforms demonstrates clear improvements in content creation, lead qualification, and task automation. The detailed analysis of AI-driven tools highlights their potential to significantly accelerate marketing workflows and improve lead conversion rates. Overall, the thesis presents a convincing case for AI’s transformative impact on digital marketing and lead management strategies.Tétel Korlátozottan hozzáférhető DESIGN OF CUSTOMIZED MACHINE PRODUCTION LINE AT BURKLE HUNGARY KFT USING LEAN TOOLSOsmanova, Havva; Matkó, Andrea Emese; DE--Műszaki KarThis study aimed to identify waste types, root causes, and solutions in the production cell at Bürkle Hungary Kft using Lean tools, particularly Multi-Moment Analysis (MMA) and time measurement.The findings indicated that 62.5% of activities were non-value-adding and only 37.5% were value-adding.This inefficiency was verified by time measurements, which showed that 60% of the time was spent on Non value added activities. A Fishbone Diagram and Pareto charts highlighted important problems, such as an unsufficient layout, disorganized tools, and ineffective production techniques. The study suggested implementing the 5S principle, providing employee training, and switching to a line production system with six workstations in order to address these issues. The goals of these interventions are to improve labor utilization, decrease motion waste, and streamline workflows. All things considered, it is anticipated that the suggested adjustments increased Bürkle Kft's output and effectiveness.Tétel Korlátozottan hozzáférhető Harmonization of The Supply Chain between Europe and Best-Cost Countries by Unique Machine ProductionByambasandui, Ariunsan; Matkó , Andrea Emese; DE--Műszaki KarThis thesis investigates the harmonization of Engineer-to-Order (ETO) and Configure-to-Order (CTO) supply chains by developing a Hybrid model, using Bürkle Hungary as a case study. The study focuses on optimizing lead time, total cost, customization, and inventory turnover in producing the LAMVS 500 machine. Internal company data was used to map processes and calculate performance indicators for ETO, CTO, and Hybrid models. The Analytic Hierarchy Process (AHP) was applied to prioritize KPIs and evaluate each model's effectiveness. Results show that the Hybrid model offers the best balance, combining the flexibility of ETO with the efficiency of CTO. Ultimately, the Hybrid approach supports a lean, responsive, and harmonized global supply chain.Tétel Korlátozottan hozzáférhető The Examination of the Economic and Environmental Efficiency of Renewable Energy Sources Use.Gasimov, Kanan; T. Kiss, Judit Gabriella; DE--Műszaki KarThis study analyzes the economic and environmental performance of renewable energy using national case studies and both linear and power regression models. It explores how renewable energy impacts greenhouse gas emissions in relation to GDP per capita, fossil fuel and renewable energy use, R&D expenditure, industrial value added, and urbanization. The findings show that renewable energy promotes economic growth by creating jobs, driving innovation, and improving energy security while also reducing emissions. However, challenges such as technology limits, material scarcity, financial barriers, and public perception remain. The study emphasizes the need for strong political support, continuous innovation, effective financing, public engagement, and circular economy practices to overcome these issues. Ultimately, the research aims to inform stakeholders and support efforts toward a sustainable and effective global energy transition.Tétel Korlátozottan hozzáférhető Bio-Brick ProjectAlliance , Ishimwe; Budai, István; DE--Műszaki KarEvaluating the mechanical, financial, and environmental feasibility of bio-bricks was the main goal, with an emphasis on lowering the carbon footprint and construction waste related to traditional brick manufacturing. Using varying ratios of the elements, new brick combinations were created using experimental procedures. These ratios' impacts on durability, water absorption, cohesiveness, and compressive strength were all thoroughly examined. Furthermore, a comparison of the production costs, embodied energy, and resource usage of fired and unburned bio-bricks was carried out.