TECHSYS 2026: 15TH INTERNATIONAL SCIENTIFIC CONFERENCE ON ENGINEERING, TECHNOLOGY AND SYSTEMS – TECHSYS 2026

This page contains an index consisting of author-provided keywords.

3
3D printing	Research on impact resistance using free-falling dart drop testing of 3D printed parts made of ABS and PETG according ASTM D1709 Mechanical Characterization of PETG/TPU Multi-Material 3D-Printed Samples and Fabrication of a Test Part Application of 3D Printed Patterns in Sand Casting Tensile testing at elevated temperatures of PolyJet Digital ABS Plus material
3D-printed	The Influence of Infill Direction on the Tensile Strength of FDM 3D-printed ABS produced at high speed
A
ABS	The Influence of Infill Direction on the Tensile Strength of FDM 3D-printed ABS produced at high speed Investigation of Optimal Temperature Parameters in ABS Additive Printing
access control	Architecture and performance evaluation of real-time facial recognition for access control
accuracy	Prediction of Cutting Tool Wear in Turning
Accuracy assessment	Assessment of Accuracy in Measuring Distance with Ultra-sound
Adaptive and sustainable ecosystems	Design and Implementation of a FIWARE-Based Education Smart Data Model for University Campus Management
additive manufacturing	Investigation of Optimal Temperature Parameters in ABS Additive Printing Manufacturing Technologies Comparison for Nozzles Investigation of Overall Light Transmittance of PETG Material Investigation of the Influence of the k-Factor Parameter on the Quality of Printed Parts Using Ingeo Biopolymer 4043D
Additive technologie	Experimental Determination of Mechanical Characteristics: Hardness and Roughness of PolyJet Test Bodies for Digital ABS Plus Material
adversarial robustness	Adversarial Robustness and Explainability in AI-Generated Face Detection
adversarial training	Adversarial Robustness and Explainability in AI-Generated Face Detection
aerodynamics	Wind tunnel experiment and analysis of aerodynamic characteristics of eVTOL aircraft
aerodynamics of coaxial rotors	Applications of Twin Counter–Rotating Common–Axis Rotor Systems in Modern Rotorcraft and UAVs
aeroelastic responses of a helicopter rotor blade ground effect of a helicopter rotor	Assessment of Flutter Stability Constraints and the Impact on the Helicopter Rotor Aeroelastic Characteristics
AI	SQL Database Optimization as a Driver for SME Digital Transformation: A Case Study in the PV Sector
AI data center	AI Factories as the backbone for driving AI ecosystem in EU
AI ecosystem	AI Factories as the backbone for driving AI ecosystem in EU
AI factory	AI Factories as the backbone for driving AI ecosystem in EU
AI-generated faces	Adversarial Robustness and Explainability in AI-Generated Face Detection
air navigation	Compensations for Horizontal Inertial Components of INS/GNSS with Flight Altitude
Air Quality	HVAC Duct Contamination and Its Impact on Energy Efficien-cy and Indoor Air Quality: Evaluation and Ranking of Inspec-tion Methods Using Multi-Criteria Analysis
analysis	Analysis of Natural Frequencies of a MacPherson Suspension using Different Bushings Elastic Characteristics
analysis kinematic viscosity	Aging Behavior and Wear Metal Evolution of Low-Viscosity SAE 0W20 Engine Oil during the First Service Interval
analytical modeling	Analytical Recommendation for the Battery Capacity of a Photovoltaic System Influence of a Confuser–Diffuser Channel on the Energy Effi-ciency of an Idealized Theoretical Model of a Wind Turbine
analytical rubric	Automated Assessment of Cognitive Levels in Bloom's Taxonomy through RAG-Based Architecture with LLMs
anomaly detection	Anomaly Detection in ADS-B Air Traffic Data Using Distributed Machine Learning
Antarctica	Instrumentation used for VHF solar burst observations at the Bulgarian Antarctic Base during Solar Cycle 25.
antennas	Instrumentation used for VHF solar burst observations at the Bulgarian Antarctic Base during Solar Cycle 25.
application-layer protocols	Assessing MQTT, CoAP and HTTP performance in real-life scenarios on ESP32-C6 IoT node
approach of adjustable reliability	Integrating the Approach of Adjustable Reliability into the System Development Life Cycle
artificial intelligence	Quantum Machine Learning for Enhanced Cardiovascular Disease Risk Prediction Web-based financial diary: architecture, functionalities and application for personal finance management
artistic image	Exploring the Relationships between Material and Image in the Exquisite Graphics of Letterpress Printing
ascorbic acid	Effect of Plastic Deformation on the Corrosion Behavior of EN AW-2024 Aluminum Alloy in Acidic Environment in the Pres-ence of Eco-Friendly Inhibitors
ASP.NET 8	Implementing SLI/SLA/SLO Metrics in an ASP.NET 8 Microservices Architecture Using OpenTelemetry and Prometheus
asymmetric bridge converter	Simulation and experimental investigation of an SRM drive in motoring mode
attenuation	Investigation of Overall Light Transmittance of PETG Material
Authentication protocol
Autoencoders	Unsupervised Categorization of Hysteresis Loops: A Comparative Study of Expert-Driven Feature Engineering vs. Deep 1D-Convolutional Autoencoders
Automated Component Interconnection	AutoSignal: A Dart-based Programming Paradigm for Automatic Component Connection via Signal-Slot Architecture
automated grading	Automated Assessment of Cognitive Levels in Bloom's Taxonomy through RAG-Based Architecture with LLMs
automated incident response	Cyber response automation with dedicated AI agents
automated notifications	Integrating Automated Notifications and Geospatial Navigation into a Mobile Platform to Support Higher Education
automatic orienting	Low-cost automation system for sorting parts of type “Connector”
automatic speech recognition	Small Voice Bulgarian Language Model Generation Based on Vosk-Type Methods and Algorithms
autonomous navigation	Compensations for Horizontal Inertial Components of INS/GNSS with Flight Altitude
AutoSignal	AutoSignal: A Dart-based Programming Paradigm for Automatic Component Connection via Signal-Slot Architecture
average month’s power	Investigation of the Power Characteristics of a Photovoltaic Power Plant in Relation to Daylight Duration
average power	Investigation of the Power Characteristics of a Photovoltaic Power Plant in Relation to Daylight Duration
B
battery capacity	Analytical Recommendation for the Battery Capacity of a Photovoltaic System
battery storage	Minimizing the grid energy component when charging electric vehicles
behavioral biometrics	The Invisible Guardian: Big Data, Behavioral Biometrics, and the Era of Continuous Authentication
Betz limit	Influence of a Confuser–Diffuser Channel on the Energy Effi-ciency of an Idealized Theoretical Model of a Wind Turbine
Bidirectional Encoding	Bidirectional Transformer Representations for Transferable Statistical Language Models
big data analytics	The Invisible Guardian: Big Data, Behavioral Biometrics, and the Era of Continuous Authentication
Biodegradable	Design and technology development of an innovative biode-gradable single-use cup
biometrics	Architecture and performance evaluation of real-time facial recognition for access control
bitumen binder:	Rheological Properties of Bitumen Modified with Crumb Rubber and Devulcanized Rubber
blockchain	A Governance-Aware, Privacy-Preserving, Event-Driven Conceptual Model for Supply Chain Traceability Blockchain for EUPHEMIA Market Transparency
Bloom's Taxonomy	Automated Assessment of Cognitive Levels in Bloom's Taxonomy through RAG-Based Architecture with LLMs
boiling point	Analytical study of methods and diagnostic tools for evaluating automotive brake fluid quality under operational conditions
brake fluid	Analytical study of methods and diagnostic tools for evaluating automotive brake fluid quality under operational conditions
budgeting	Web-based financial diary: architecture, functionalities and application for personal finance management
Bulgarian language	Small Voice Bulgarian Language Model Generation Based on Vosk-Type Methods and Algorithms
Bulgarian population	Impact of SMOTE Oversampling on Machine Learning Classifiers for Preeclampsia Prediction Under Severe Class Imbalance: Evidence from a Bulgarian Screening Cohort
bushings	Analysis of Natural Frequencies of a MacPherson Suspension using Different Bushings Elastic Characteristics
buttress thread	A Parametric CNC Approach for Buttress Threads Machining
C
CAE simulation	Application of 3D Printed Patterns in Sand Casting
Calibration results	Use of DCC Additional Information for the Expression of Calibration Results in Metrological Practice and Education
camera traps	Time series analysis of the behavior of wild animals using camera traps
capacity	Conducting an Assessment of the Operational Characteristics of an Existing Roundabout and a Comparative Analysis with Other Types of Intersections
carbon particles	Investigation of the Mechanical Properties and Electromagnetic Damping of Polymer Composites Reinforced with Carbon Particles and Cenospheres
Casting patterns	Application of 3D Printed Patterns in Sand Casting
cenospheres	Investigation of the Mechanical Properties and Electromagnetic Damping of Polymer Composites Reinforced with Carbon Particles and Cenospheres
CFD simulation	Investigation of Airflow Parameters in a G-Shaped Channel
chromium	Influence of Chemical Composition on Microstructure and Hardness of 24Cr–Ni Steels Alloyed with Nitrogen
citric acid	Effect of Plastic Deformation on the Corrosion Behavior of EN AW-2024 Aluminum Alloy in Acidic Environment in the Pres-ence of Eco-Friendly Inhibitors
classification	A Classification of Sensor Data Fusion Methods: Concepts and Recent Advances
CNC thread machining	A Parametric CNC Approach for Buttress Threads Machining
CNN	Adversarial Robustness and Explainability in AI-Generated Face Detection
CoAP	Assessing MQTT, CoAP and HTTP performance in real-life scenarios on ESP32-C6 IoT node
coaxial helicopter systems	Applications of Twin Counter–Rotating Common–Axis Rotor Systems in Modern Rotorcraft and UAVs
cold forging	Simulation Modelling of a Closed-Die Cold Forging Process by Use of the QForm Specialised Software
comparative analysis	Conducting an Assessment of the Operational Characteristics of an Existing Roundabout and a Comparative Analysis with Other Types of Intersections
Comparison of similar engines	Emissions and Dynamics: The Role of Software in Similar Automotive Platforms
complex viscosity	Rheological Properties of Bitumen Modified with Crumb Rubber and Devulcanized Rubber
composites	Investigation of the Mechanical Properties and Electromagnetic Damping of Polymer Composites Reinforced with Carbon Particles and Cenospheres Manufacturing Technologies Comparison for Nozzles
computational ergonomic optimization	Optimizing Computer Mouse Shells Design Based on Viet-namese Student Anthropometry
computer vision	A Hybrid Synthetic Dataset Generation for Robust Document Recognition Using Image Rendering and Domain Randomization Architecture and performance evaluation of real-time facial recognition for access control
concentrate	An investigation into the elemental composition and develop-ment of a scheme that is efficient in the enrichment of cop-per-bearing ores from the Yoshlik deposit (Uzbekistan)
concept learning	Heuristic Algorithm for Conceptual Learning
Conceptual	Constructive approach to the design of data protection systems. Models and transformation
conceptual framework	Integrating the Approach of Adjustable Reliability into the System Development Life Cycle
conceptual model	A Governance-Aware, Privacy-Preserving, Event-Driven Conceptual Model for Supply Chain Traceability
condition monitoring	Predictive Maintenance via Remaining Useful Life Estimation in Jet Engine Systems: A Comparative Analysis of Machine Learning Approaches Using NASA CMAPSS Dataset
Constructive	Constructive approach to the design of data protection systems. Models and transformation
consumer wearables	An Experimental Setup for Collecting Physiological Data from Vehicle Drivers
content	An investigation into the elemental composition and develop-ment of a scheme that is efficient in the enrichment of cop-per-bearing ores from the Yoshlik deposit (Uzbekistan)
continuous authentication	The Invisible Guardian: Big Data, Behavioral Biometrics, and the Era of Continuous Authentication
control	Low-cost automation system for sorting parts of type “Connector”
convolutional neural network	Deep Learning Estimation of Mechanical Power in Pressure-Controlled Ventilation Using a 1D CNN–Bidirectional LSTM Model
copper	An investigation into the elemental composition and develop-ment of a scheme that is efficient in the enrichment of cop-per-bearing ores from the Yoshlik deposit (Uzbekistan)
corrosion inhibitors	Effect of Plastic Deformation on the Corrosion Behavior of EN AW-2024 Aluminum Alloy in Acidic Environment in the Pres-ence of Eco-Friendly Inhibitors
corrosion rate	Investigation of the Corrosion of Steel S235JR in Common Beverages
corrosion resistance	Effect of Plastic Deformation on the Corrosion Behavior of EN AW-2024 Aluminum Alloy in Acidic Environment in the Pres-ence of Eco-Friendly Inhibitors
crossflow turbine	A combined approach for design concept variants assessment of a hydropower system
curve passing	Influence of Three-Axle Bogie Geometric Parameters on Inter-action Forces and Derailment Safety
curvilinear channel	Investigation of Airflow Parameters in a G-Shaped Channel
cybersecurity	The Invisible Guardian: Big Data, Behavioral Biometrics, and the Era of Continuous Authentication
cаrbidе mоrphоlоgy	Influеncе оf Chеmicаl Cоmpоsitiоn оn Micrоstructurе аnd Hаrdnеss оf High-Chrоmium Cаst Irоns
cаst irоn	Influеncе оf Chеmicаl Cоmpоsitiоn оn Micrоstructurе аnd Hаrdnеss оf High-Chrоmium Cаst Irоns
D
Dart	AutoSignal: A Dart-based Programming Paradigm for Automatic Component Connection via Signal-Slot Architecture
data augmentation	A Hybrid Synthetic Dataset Generation for Robust Document Recognition Using Image Rendering and Domain Randomization
data fusion	A Classification of Sensor Data Fusion Methods: Concepts and Recent Advances
Data models and frameworks	Design and Implementation of a FIWARE-Based Education Smart Data Model for University Campus Management
Data processing	Data driven electricity forecasting for small grid tied photovol-taic power plants in the transition from centralized to distributed generation
Data protection	Constructive approach to the design of data protection systems. Models and transformation
Data security	Constructive approach to the design of data protection systems. Models and transformation
database	Technology for Managing and Grouping Datasets regarding Protected Natural Areas and Species
Databricks	SQL Database Optimization as a Driver for SME Digital Transformation: A Case Study in the PV Sector
dataset generation	A Hybrid Synthetic Dataset Generation for Robust Document Recognition Using Image Rendering and Domain Randomization
datasets	Technology for Managing and Grouping Datasets regarding Protected Natural Areas and Species
day power	Investigation of the Power Characteristics of a Photovoltaic Power Plant in Relation to Daylight Duration
DB Optimization	SQL Database Optimization as a Driver for SME Digital Transformation: A Case Study in the PV Sector
DC–DC buck converter	A Fractal-Inspired Supervisory Layer for Robust PI Control of DC–DC Buck Converters
decision tree	Heuristic Algorithm for Conceptual Learning
deep learning	A Hybrid Synthetic Dataset Generation for Robust Document Recognition Using Image Rendering and Domain Randomization
deepfake detection	Adversarial Robustness and Explainability in AI-Generated Face Detection
dependable distributed systems	Integrating the Approach of Adjustable Reliability into the System Development Life Cycle
derailment safety	Influence of Three-Axle Bogie Geometric Parameters on Inter-action Forces and Derailment Safety
design configurations with coaxial rotors aerodynamic interactions	Applications of Twin Counter–Rotating Common–Axis Rotor Systems in Modern Rotorcraft and UAVs
design of experiment	Investigation of Optimal Temperature Parameters in ABS Additive Printing
Device management	Design and development of a microcontroller board for environmental control and device management
diffuser-augmented wind turbine (DAWT)	Influence of a Confuser–Diffuser Channel on the Energy Effi-ciency of an Idealized Theoretical Model of a Wind Turbine
Digital ABS Plus	Experimental Determination of Mechanical Characteristics: Hardness and Roughness of PolyJet Test Bodies for Digital ABS Plus Material
Digital Calibration Certificate	Use of DCC Additional Information for the Expression of Calibration Results in Metrological Practice and Education
digital identity	The Invisible Guardian: Big Data, Behavioral Biometrics, and the Era of Continuous Authentication
Digital Transformation	SQL Database Optimization as a Driver for SME Digital Transformation: A Case Study in the PV Sector
Dijkstra’s algorithm	Implementation and evaluation of the shortest-path algorithm for GIS Network Routing
Directed Energy Deposition	Manufacturing Technologies Comparison for Nozzles
Distance	Assessment of Accuracy in Measuring Distance with Ultra-sound
Django	Integrating Automated Notifications and Geospatial Navigation into a Mobile Platform to Support Higher Education
document analysis	A Hybrid Synthetic Dataset Generation for Robust Document Recognition Using Image Rendering and Domain Randomization
drift	Research on the Time Mutability Method for Stochastic Objects Drift Velocity Measurement - a review
driver perception and reaction	Driver Visibility and Pedestrian Detection Distance in Nighttime Traffic Accident Reconstruction
E
e-learning	Automated Assessment of Cognitive Levels in Bloom's Taxonomy through RAG-Based Architecture with LLMs
edge computing	Small Voice Bulgarian Language Model Generation Based on Vosk-Type Methods and Algorithms
edge cost function	Implementation and evaluation of the shortest-path algorithm for GIS Network Routing
elastic characteristics	Analysis of Natural Frequencies of a MacPherson Suspension using Different Bushings Elastic Characteristics
electric conductivity	Analytical study of methods and diagnostic tools for evaluating automotive brake fluid quality under operational conditions
electric current	Analytical study of methods and diagnostic tools for evaluating automotive brake fluid quality under operational conditions
electric vehicles	Minimizing the grid energy component when charging electric vehicles
Electrical grid system	Data driven electricity forecasting for small grid tied photovol-taic power plants in the transition from centralized to distributed generation
Electrical machines	A Priori Reliability of Electrical Machines and Its Verification by Testing
electricity	Investigation of the Power Characteristics of a Photovoltaic Power Plant in Relation to Daylight Duration
electromagnetic damping	Investigation of the Mechanical Properties and Electromagnetic Damping of Polymer Composites Reinforced with Carbon Particles and Cenospheres
elevated temperatures	Tensile testing at elevated temperatures of PolyJet Digital ABS Plus material
ellipsoidal geodesy	Compensations for Horizontal Inertial Components of INS/GNSS with Flight Altitude
Embedded systems	Microcontroller firmware for embedded systems in industrial applications Design and development of a microcontroller board for environmental control and device management
emissions	Experimental assessment of formaldehyde gas emissions from laminate and solid parquet under simulated fire conditions
EN AW-2024 aluminum alloy	Effect of Plastic Deformation on the Corrosion Behavior of EN AW-2024 Aluminum Alloy in Acidic Environment in the Pres-ence of Eco-Friendly Inhibitors
energy	Investigation of the Power Characteristics of a Photovoltaic Power Plant in Relation to Daylight Duration
energy conversion	Influence of a Confuser–Diffuser Channel on the Energy Effi-ciency of an Idealized Theoretical Model of a Wind Turbine
Energy Efficiency	HVAC Duct Contamination and Its Impact on Energy Efficien-cy and Indoor Air Quality: Evaluation and Ranking of Inspec-tion Methods Using Multi-Criteria Analysis
energy forecast	Electric Power Consumption Forecasting In Bulgaria
energy management	Minimizing the grid energy component when charging electric vehicles
Environmental control	Design and development of a microcontroller board for environmental control and device management
EPCIS 2.0	A Governance-Aware, Privacy-Preserving, Event-Driven Conceptual Model for Supply Chain Traceability
equilibrium reflux boiling point	Analytical study of methods and diagnostic tools for evaluating automotive brake fluid quality under operational conditions
ergonomic mouse	Optimizing Computer Mouse Shells Design Based on Viet-namese Student Anthropometry
ESP32-C6	Assessing MQTT, CoAP and HTTP performance in real-life scenarios on ESP32-C6 IoT node
EU regulation	AI Factories as the backbone for driving AI ecosystem in EU
EUPHEMIA	Blockchain for EUPHEMIA Market Transparency
Event-Driven Architecture	AutoSignal: A Dart-based Programming Paradigm for Automatic Component Connection via Signal-Slot Architecture
eVTOL	Wind tunnel experiment and analysis of aerodynamic characteristics of eVTOL aircraft
experimental	Analysis of Natural Frequencies of a MacPherson Suspension using Different Bushings Elastic Characteristics
explainable AI	Adversarial Robustness and Explainability in AI-Generated Face Detection
extraction	An investigation into the elemental composition and develop-ment of a scheme that is efficient in the enrichment of cop-per-bearing ores from the Yoshlik deposit (Uzbekistan)
F
Face recognition	Architecture and performance evaluation of real-time facial recognition for access control
facial embeddings	Architecture and performance evaluation of real-time facial recognition for access control
Fatigue defects	Assessment of Non-Destructive Testing Techniques for Detecting Fatigue Cracks in Railway Suspension Pivot Pins
FDM	The Influence of Infill Direction on the Tensile Strength of FDM 3D-printed ABS produced at high speed Investigation of the Influence of the k-Factor Parameter on the Quality of Printed Parts Using Ingeo Biopolymer 4043D
FDM/FFF	Application of 3D Printed Patterns in Sand Casting
Feature Engineering	Unsupervised Categorization of Hysteresis Loops: A Comparative Study of Expert-Driven Feature Engineering vs. Deep 1D-Convolutional Autoencoders
FFT	Identification of the Natural Frequencies of a MacPherson Suspension Using FFT, FRF, and Spectral Analysis
Field Measurement	Quantifying Tram Overhead Contact Line Stagger and Its Impact on Carbon Strip Wear
financial analysis	A combined approach for design concept variants assessment of a hydropower system
financial diary	Web-based financial diary: architecture, functionalities and application for personal finance management
financial literacy	Web-based financial diary: architecture, functionalities and application for personal finance management
fine graphics	Exploring the Relationships between Material and Image in the Exquisite Graphics of Letterpress Printing
Fine-tuning	Bidirectional Transformer Representations for Transferable Statistical Language Models
finite element analysis	Transient Numerical Simulation of Reheating Furnace Behavior for Continuous Casting Rail Steel Blooms Prior to Rolling
Firebase	Integrating Automated Notifications and Geospatial Navigation into a Mobile Platform to Support Higher Education
Firmware architecture	Microcontroller firmware for embedded systems in industrial applications
Firmware implementation	Microcontroller firmware for embedded systems in industrial applications
first-trimester screening	Impact of SMOTE Oversampling on Machine Learning Classifiers for Preeclampsia Prediction Under Severe Class Imbalance: Evidence from a Bulgarian Screening Cohort
FIWARE	Design and Implementation of a FIWARE-Based Education Smart Data Model for University Campus Management
flat wagon	Enhancing the Load Capacity of Flat Wagons: Theoretical Justification and Dynamic Simulation of a Prototype Three Axle Bogie
flotation	An investigation into the elemental composition and develop-ment of a scheme that is efficient in the enrichment of cop-per-bearing ores from the Yoshlik deposit (Uzbekistan)
Flutter	AutoSignal: A Dart-based Programming Paradigm for Automatic Component Connection via Signal-Slot Architecture
flutter stability dynamics	Assessment of Flutter Stability Constraints and the Impact on the Helicopter Rotor Aeroelastic Characteristics
food environments	Investigation of the Corrosion of Steel S235JR in Common Beverages
Forecasting	Data driven electricity forecasting for small grid tied photovol-taic power plants in the transition from centralized to distributed generation
formaldehyde	Experimental assessment of formaldehyde gas emissions from laminate and solid parquet under simulated fire conditions
Fractal control	A Fractal-Inspired Supervisory Layer for Robust PI Control of DC–DC Buck Converters
free-falling dart	Research on impact resistance using free-falling dart drop testing of 3D printed parts made of ABS and PETG according ASTM D1709
freight wagon	Influence of Three-Axle Bogie Geometric Parameters on Inter-action Forces and Derailment Safety
frequency-domain modeling	Frequency-Domain Modal Characterization and Multi-Injection Resonance Assessment of a Zeta DC–DC Converter
FRF	Identification of the Natural Frequencies of a MacPherson Suspension Using FFT, FRF, and Spectral Analysis
functional reliability	Expediency Assessment Of An Information System Based On The Reliability Characteristics Of Its Elements
Fused Deposition Modeling	Investigation of the Influence of the k-Factor Parameter on the Quality of Printed Parts Using Ingeo Biopolymer 4043D
G
G-shaped channel	Investigation of Airflow Parameters in a G-Shaped Channel
Gaussian Mixture Model	Anomaly Detection in ADS-B Air Traffic Data Using Distributed Machine Learning
GDPR	Architecture and performance evaluation of real-time facial recognition for access control
geolocation	A Portable IoT-Enabled System for Georeferenced Soil Nutrient Screening in Agricultural Fields
geospatial navigation	Integrating Automated Notifications and Geospatial Navigation into a Mobile Platform to Support Higher Education
GIS routing	Implementation and evaluation of the shortest-path algorithm for GIS Network Routing
governance	A Governance-Aware, Privacy-Preserving, Event-Driven Conceptual Model for Supply Chain Traceability
Grad-CAM	Adversarial Robustness and Explainability in AI-Generated Face Detection
gradient boosting	Machine Learning-Based Heart Disease Prediction: A Comparative Analysis with Feature Importance Evaluation Electric Power Consumption Forecasting In Bulgaria
grouping	Technology for Managing and Grouping Datasets regarding Protected Natural Areas and Species
H
hardness	Influence of Chemical Composition on Microstructure and Hardness of 24Cr–Ni Steels Alloyed with Nitrogen Experimental Determination of Mechanical Characteristics: Hardness and Roughness of PolyJet Test Bodies for Digital ABS Plus Material
Hardware architecture	Design and development of a microcontroller board for environmental control and device management
harmonic analysis	Frequency-Domain Modal Characterization and Multi-Injection Resonance Assessment of a Zeta DC–DC Converter
HDBSCAN	Unsupervised Categorization of Hysteresis Loops: A Comparative Study of Expert-Driven Feature Engineering vs. Deep 1D-Convolutional Autoencoders
heart disease prediction	Machine Learning-Based Heart Disease Prediction: A Comparative Analysis with Feature Importance Evaluation
heat distribution	Transient Numerical Simulation of Reheating Furnace Behavior for Continuous Casting Rail Steel Blooms Prior to Rolling
Heat Sink	Numerical Analysis of Fluid Flow and Heat Transfer in Wavy Microchannels with Pin Inserts
heat transfer	Transient Numerical Simulation of Reheating Furnace Behavior for Continuous Casting Rail Steel Blooms Prior to Rolling
heuristic approach	Heuristic Algorithm for Conceptual Learning
high print speeds	The Influence of Infill Direction on the Tensile Strength of FDM 3D-printed ABS produced at high speed
high-chrоmium	Influеncе оf Chеmicаl Cоmpоsitiоn оn Micrоstructurе аnd Hаrdnеss оf High-Chrоmium Cаst Irоns
higher education	Integrating Automated Notifications and Geospatial Navigation into a Mobile Platform to Support Higher Education
Hinge pins	Assessment of Non-Destructive Testing Techniques for Detecting Fatigue Cracks in Railway Suspension Pivot Pins
Horizontal Dynamic Passport	Influence of Three-Axle Bogie Geometric Parameters on Inter-action Forces and Derailment Safety
HTTP	Assessing MQTT, CoAP and HTTP performance in real-life scenarios on ESP32-C6 IoT node
human–computer interaction	Optimizing Computer Mouse Shells Design Based on Viet-namese Student Anthropometry
HVAC Systems	HVAC Duct Contamination and Its Impact on Energy Efficien-cy and Indoor Air Quality: Evaluation and Ranking of Inspec-tion Methods Using Multi-Criteria Analysis
hydropower system	A combined approach for design concept variants assessment of a hydropower system
hygroscopic	Analytical study of methods and diagnostic tools for evaluating automotive brake fluid quality under operational conditions
Hysteresis	Unsupervised Categorization of Hysteresis Loops: A Comparative Study of Expert-Driven Feature Engineering vs. Deep 1D-Convolutional Autoencoders
hаrdnеss	Influеncе оf Chеmicаl Cоmpоsitiоn оn Micrоstructurе аnd Hаrdnеss оf High-Chrоmium Cаst Irоns
I
ID card recognition	A Hybrid Synthetic Dataset Generation for Robust Document Recognition Using Image Rendering and Domain Randomization
Identification	Identification of the Natural Frequencies of a MacPherson Suspension Using FFT, FRF, and Spectral Analysis
illumination	Investigation of Overall Light Transmittance of PETG Material
impact resistance	Research on impact resistance using free-falling dart drop testing of 3D printed parts made of ABS and PETG according ASTM D1709
Increase torque and power output	Emissions and Dynamics: The Role of Software in Similar Automotive Platforms
indoor air toxicity	Experimental assessment of formaldehyde gas emissions from laminate and solid parquet under simulated fire conditions
industrial application	Overview of the Application of Innovation Management Tools and Methods in Industry
infill direction	The Influence of Infill Direction on the Tensile Strength of FDM 3D-printed ABS produced at high speed
influence	The Influence of Infill Direction on the Tensile Strength of FDM 3D-printed ABS produced at high speed
information system	Expediency Assessment Of An Information System Based On The Reliability Characteristics Of Its Elements
innovation management	Overview of the Application of Innovation Management Tools and Methods in Industry
innovation management systems	Overview of the Application of Innovation Management Tools and Methods in Industry
innovation management tools and methods	Overview of the Application of Innovation Management Tools and Methods in Industry
Innovative education	Design and Implementation of a FIWARE-Based Education Smart Data Model for University Campus Management
INS/GNSS	Compensations for Horizontal Inertial Components of INS/GNSS with Flight Altitude
Installer Segmentation	SQL Database Optimization as a Driver for SME Digital Transformation: A Case Study in the PV Sector
Intelligent campus technology	Design and Implementation of a FIWARE-Based Education Smart Data Model for University Campus Management
intelligent systems	Predictive Maintenance via Remaining Useful Life Estimation in Jet Engine Systems: A Comparative Analysis of Machine Learning Approaches Using NASA CMAPSS Dataset
intermodal transport	Enhancing the Load Capacity of Flat Wagons: Theoretical Justification and Dynamic Simulation of a Prototype Three Axle Bogie
internal combustion engine	Aging Behavior and Wear Metal Evolution of Low-Viscosity SAE 0W20 Engine Oil during the First Service Interval
Internet of Things (IoT)	Data driven electricity forecasting for small grid tied photovol-taic power plants in the transition from centralized to distributed generation
Interoperability standards	Design and Implementation of a FIWARE-Based Education Smart Data Model for University Campus Management
IoT	A Portable IoT-Enabled System for Georeferenced Soil Nutrient Screening in Agricultural Fields Assessing MQTT, CoAP and HTTP performance in real-life scenarios on ESP32-C6 IoT node
ISO 56000 series of standards	Overview of the Application of Innovation Management Tools and Methods in Industry
Isolation Forest	Anomaly Detection in ADS-B Air Traffic Data Using Distributed Machine Learning
Izod impact strength test	Mechanical Characterization of PETG/TPU Multi-Material 3D-Printed Samples and Fabrication of a Test Part
J
JWT	Integrating Automated Notifications and Geospatial Navigation into a Mobile Platform to Support Higher Education
K
k-Factor	Investigation of the Influence of the k-Factor Parameter on the Quality of Printed Parts Using Ingeo Biopolymer 4043D
Kaldi	Small Voice Bulgarian Language Model Generation Based on Vosk-Type Methods and Algorithms
L
laminate	Experimental assessment of formaldehyde gas emissions from laminate and solid parquet under simulated fire conditions
Language Modeling	Bidirectional Transformer Representations for Transferable Statistical Language Models
lateral interaction forces	Influence of Three-Axle Bogie Geometric Parameters on Inter-action Forces and Derailment Safety
Lattice
letterpress	Exploring the Relationships between Material and Image in the Exquisite Graphics of Letterpress Printing
light	Investigation of Overall Light Transmittance of PETG Material
light transmittance	Investigation of Overall Light Transmittance of PETG Material
LightGBM	Electric Power Consumption Forecasting In Bulgaria
Linear Advance	Investigation of the Influence of the k-Factor Parameter on the Quality of Printed Parts Using Ingeo Biopolymer 4043D
Living laboratories	Design and Implementation of a FIWARE-Based Education Smart Data Model for University Campus Management
LLM	Automated Assessment of Cognitive Levels in Bloom's Taxonomy through RAG-Based Architecture with LLMs
LM5118 controller	A Study and Small-Signal Modeling of a Two-Switch Buck–Boost Converter Considering Parasitic Elements
load capacity	Enhancing the Load Capacity of Flat Wagons: Theoretical Justification and Dynamic Simulation of a Prototype Three Axle Bogie
logical function minimization	Heuristic Algorithm for Conceptual Learning
logistic regression	Impact of SMOTE Oversampling on Machine Learning Classifiers for Preeclampsia Prediction Under Severe Class Imbalance: Evidence from a Bulgarian Screening Cohort Machine Learning-Based Heart Disease Prediction: A Comparative Analysis with Feature Importance Evaluation
LolyDash	Web-based financial diary: architecture, functionalities and application for personal finance management
loss modulus:	Rheological Properties of Bitumen Modified with Crumb Rubber and Devulcanized Rubber
low-cost automation	Low-cost automation system for sorting parts of type “Connector”
lubricant aging	Aging Behavior and Wear Metal Evolution of Low-Viscosity SAE 0W20 Engine Oil during the First Service Interval
lubricant degradation	Aging Behavior and Wear Metal Evolution of Low-Viscosity SAE 0W20 Engine Oil during the First Service Interval
M
M7C3 cаrbidеs	Influеncе оf Chеmicаl Cоmpоsitiоn оn Micrоstructurе аnd Hаrdnеss оf High-Chrоmium Cаst Irоns
machine learning	Quantum Machine Learning for Enhanced Cardiovascular Disease Risk Prediction The Invisible Guardian: Big Data, Behavioral Biometrics, and the Era of Continuous Authentication Machine Learning-Based Heart Disease Prediction: A Comparative Analysis with Feature Importance Evaluation Anomaly Detection in ADS-B Air Traffic Data Using Distributed Machine Learning Electric Power Consumption Forecasting In Bulgaria Predictive Maintenance via Remaining Useful Life Estimation in Jet Engine Systems: A Comparative Analysis of Machine Learning Approaches Using NASA CMAPSS Dataset
MacPherson suspension	Identification of the Natural Frequencies of a MacPherson Suspension Using FFT, FRF, and Spectral Analysis
macro programming in CNC	A Parametric CNC Approach for Buttress Threads Machining
material	Exploring the Relationships between Material and Image in the Exquisite Graphics of Letterpress Printing
material composition	An investigation into the elemental composition and develop-ment of a scheme that is efficient in the enrichment of cop-per-bearing ores from the Yoshlik deposit (Uzbekistan)
MATLAB	Identification of the Natural Frequencies of a MacPherson Suspension Using FFT, FRF, and Spectral Analysis
maximal	Investigation of the Power Characteristics of a Photovoltaic Power Plant in Relation to Daylight Duration
MCP agents	Cyber response automation with dedicated AI agents
measurement	Investigation of Overall Light Transmittance of PETG Material
Measurement system	Assessment of Accuracy in Measuring Distance with Ultra-sound
Measurement uncertainty	Use of DCC Additional Information for the Expression of Calibration Results in Metrological Practice and Education
mechanical power	Deep Learning Estimation of Mechanical Power in Pressure-Controlled Ventilation Using a 1D CNN–Bidirectional LSTM Model
mechanical properties	Research on impact resistance using free-falling dart drop testing of 3D printed parts made of ABS and PETG according ASTM D1709 Investigation of the Mechanical Properties and Electromagnetic Damping of Polymer Composites Reinforced with Carbon Particles and Cenospheres
Medical Data	Quantum Machine Learning for Enhanced Cardiovascular Disease Risk Prediction
Metherological data	Electric Power Consumption Forecasting In Bulgaria
method	Research on the Time Mutability Method for Stochastic Objects Drift Velocity Measurement - a review
Metrological practice	Use of DCC Additional Information for the Expression of Calibration Results in Metrological Practice and Education
Microchannel	Numerical Analysis of Fluid Flow and Heat Transfer in Wavy Microchannels with Pin Inserts
Microcontroller board	Design and development of a microcontroller board for environmental control and device management
Microcontroller boards	Microcontroller firmware for embedded systems in industrial applications
Microcontroller firmware	Microcontroller firmware for embedded systems in industrial applications
microservice architecture	Implementing SLI/SLA/SLO Metrics in an ASP.NET 8 Microservices Architecture Using OpenTelemetry and Prometheus
microstructure	Influence of Chemical Composition on Microstructure and Hardness of 24Cr–Ni Steels Alloyed with Nitrogen
mineral	An investigation into the elemental composition and develop-ment of a scheme that is efficient in the enrichment of cop-per-bearing ores from the Yoshlik deposit (Uzbekistan)
ML	Impact of SMOTE Oversampling on Machine Learning Classifiers for Preeclampsia Prediction Under Severe Class Imbalance: Evidence from a Bulgarian Screening Cohort
modal impedance	Frequency-Domain Modal Characterization and Multi-Injection Resonance Assessment of a Zeta DC–DC Converter
mode shapes	Analysis of Natural Frequencies of a MacPherson Suspension using Different Bushings Elastic Characteristics
Models	Constructive approach to the design of data protection systems. Models and transformation
moisture content	Analytical study of methods and diagnostic tools for evaluating automotive brake fluid quality under operational conditions
Monitoring	Assessment of Accuracy in Measuring Distance with Ultra-sound Data driven electricity forecasting for small grid tied photovol-taic power plants in the transition from centralized to distributed generation
Moodle	Automated Assessment of Cognitive Levels in Bloom's Taxonomy through RAG-Based Architecture with LLMs
motoring mode PWM control	Simulation and experimental investigation of an SRM drive in motoring mode
MQTT	Assessing MQTT, CoAP and HTTP performance in real-life scenarios on ESP32-C6 IoT node
Multi-material	Mechanical Characterization of PETG/TPU Multi-Material 3D-Printed Samples and Fabrication of a Test Part
multi-modal data synchronization	An Experimental Setup for Collecting Physiological Data from Vehicle Drivers
multibody simulation	Enhancing the Load Capacity of Flat Wagons: Theoretical Justification and Dynamic Simulation of a Prototype Three Axle Bogie
Multiple measurements	Assessment of Accuracy in Measuring Distance with Ultra-sound
Multiscale supervisory control	A Fractal-Inspired Supervisory Layer for Robust PI Control of DC–DC Buck Converters
mutability	Research on the Time Mutability Method for Stochastic Objects Drift Velocity Measurement - a review
mаgnеsium	Influеncе оf Chеmicаl Cоmpоsitiоn оn Micrоstructurе аnd Hаrdnеss оf High-Chrоmium Cаst Irоns
mоdificаtiоn	Influеncе оf Chеmicаl Cоmpоsitiоn оn Micrоstructurе аnd Hаrdnеss оf High-Chrоmium Cаst Irоns
N
Namespace Isolation	AutoSignal: A Dart-based Programming Paradigm for Automatic Component Connection via Signal-Slot Architecture
NASA CMAPSS	Predictive Maintenance via Remaining Useful Life Estimation in Jet Engine Systems: A Comparative Analysis of Machine Learning Approaches Using NASA CMAPSS Dataset
natural frequencies	Analysis of Natural Frequencies of a MacPherson Suspension using Different Bushings Elastic Characteristics Identification of the Natural Frequencies of a MacPherson Suspension Using FFT, FRF, and Spectral Analysis
Neural Networks	Quantum Machine Learning for Enhanced Cardiovascular Disease Risk Prediction
NGSI-LD	Design and Implementation of a FIWARE-Based Education Smart Data Model for University Campus Management
nickel	Influence of Chemical Composition on Microstructure and Hardness of 24Cr–Ni Steels Alloyed with Nitrogen
night visibility	Driver Visibility and Pedestrian Detection Distance in Nighttime Traffic Accident Reconstruction
nitrogen alloying	Influence of Chemical Composition on Microstructure and Hardness of 24Cr–Ni Steels Alloyed with Nitrogen
nitrogen ferrochromium	Influence of Chemical Composition on Microstructure and Hardness of 24Cr–Ni Steels Alloyed with Nitrogen
Non-destructive testing (NDT)	Assessment of Non-Destructive Testing Techniques for Detecting Fatigue Cracks in Railway Suspension Pivot Pins
non-inverting two-switch buck–boost converter	A Study and Small-Signal Modeling of a Two-Switch Buck–Boost Converter Considering Parasitic Elements
numerical modeling	Investigation of Airflow Parameters in a G-Shaped Channel
Nusselt number	Numerical Analysis of Fluid Flow and Heat Transfer in Wavy Microchannels with Pin Inserts
O
objects	Research on the Time Mutability Method for Stochastic Objects Drift Velocity Measurement - a review
OEM bushing	Identification of the Natural Frequencies of a MacPherson Suspension Using FFT, FRF, and Spectral Analysis
offline ASR	Small Voice Bulgarian Language Model Generation Based on Vosk-Type Methods and Algorithms
open-ended questions	Automated Assessment of Cognitive Levels in Bloom's Taxonomy through RAG-Based Architecture with LLMs
OpenTelemetry	Implementing SLI/SLA/SLO Metrics in an ASP.NET 8 Microservices Architecture Using OpenTelemetry and Prometheus
optimal printing temperatures	Investigation of Optimal Temperature Parameters in ABS Additive Printing
optimization	Minimizing the grid energy component when charging electric vehicles
Optimize combustion process	Emissions and Dynamics: The Role of Software in Similar Automotive Platforms
ore	An investigation into the elemental composition and develop-ment of a scheme that is efficient in the enrichment of cop-per-bearing ores from the Yoshlik deposit (Uzbekistan)
Orientation of printing	Experimental Determination of Mechanical Characteristics: Hardness and Roughness of PolyJet Test Bodies for Digital ABS Plus Material
P
Pantograph Carbon Strip Wear	Quantifying Tram Overhead Contact Line Stagger and Its Impact on Carbon Strip Wear
partial information decomposition	A Classification of Sensor Data Fusion Methods: Concepts and Recent Advances
participation factors	Frequency-Domain Modal Characterization and Multi-Injection Resonance Assessment of a Zeta DC–DC Converter
pedestrian	Driver Visibility and Pedestrian Detection Distance in Nighttime Traffic Accident Reconstruction
Pedestrian Crossings	Research of Traffic Delays Caused by Pedestrian Crossing at a Light Regulated Intersection: Case Study of City of Sofia
Pedestrian Flows	Research of Traffic Delays Caused by Pedestrian Crossing at a Light Regulated Intersection: Case Study of City of Sofia
Performance evaluation criterion	Numerical Analysis of Fluid Flow and Heat Transfer in Wavy Microchannels with Pin Inserts
performance monitoring	Implementing SLI/SLA/SLO Metrics in an ASP.NET 8 Microservices Architecture Using OpenTelemetry and Prometheus
personal finance	Web-based financial diary: architecture, functionalities and application for personal finance management
PETG	Mechanical Characterization of PETG/TPU Multi-Material 3D-Printed Samples and Fabrication of a Test Part
Phased array ultrasonic testing (PAUT)	Assessment of Non-Destructive Testing Techniques for Detecting Fatigue Cracks in Railway Suspension Pivot Pins
photovoltaic	Investigation of the Power Characteristics of a Photovoltaic Power Plant in Relation to Daylight Duration
photovoltaic system	Analytical Recommendation for the Battery Capacity of a Photovoltaic System
photovoltaics	Minimizing the grid energy component when charging electric vehicles Data driven electricity forecasting for small grid tied photovol-taic power plants in the transition from centralized to distributed generation
physiological monitoring	An Experimental Setup for Collecting Physiological Data from Vehicle Drivers
PI control	A Fractal-Inspired Supervisory Layer for Robust PI Control of DC–DC Buck Converters
pid	A Classification of Sensor Data Fusion Methods: Concepts and Recent Advances
Pin insert	Numerical Analysis of Fluid Flow and Heat Transfer in Wavy Microchannels with Pin Inserts
PIV	Wind tunnel experiment and analysis of aerodynamic characteristics of eVTOL aircraft
PLA	Design and technology development of an innovative biode-gradable single-use cup
plastic deformation	Effect of Plastic Deformation on the Corrosion Behavior of EN AW-2024 Aluminum Alloy in Acidic Environment in the Pres-ence of Eco-Friendly Inhibitors
Pneumatic Suspension System	Design and Feasibility Assessment of Implementing a Pneumatic Suspension System in a Vehicle with a Conventional Suspension System
PolyJet	Tensile testing at elevated temperatures of PolyJet Digital ABS Plus material Experimental Determination of Mechanical Characteristics: Hardness and Roughness of PolyJet Test Bodies for Digital ABS Plus Material
polymer matrix	Investigation of the Mechanical Properties and Electromagnetic Damping of Polymer Composites Reinforced with Carbon Particles and Cenospheres
polyurethane bushing	Identification of the Natural Frequencies of a MacPherson Suspension Using FFT, FRF, and Spectral Analysis
PostGIS	Implementation and evaluation of the shortest-path algorithm for GIS Network Routing
power	Investigation of the Power Characteristics of a Photovoltaic Power Plant in Relation to Daylight Duration
Power BI	SQL Database Optimization as a Driver for SME Digital Transformation: A Case Study in the PV Sector
power electronics	Frequency-Domain Modal Characterization and Multi-Injection Resonance Assessment of a Zeta DC–DC Converter
precision agriculture	A Portable IoT-Enabled System for Georeferenced Soil Nutrient Screening in Agricultural Fields
predictive maintenance	Predictive Maintenance via Remaining Useful Life Estimation in Jet Engine Systems: A Comparative Analysis of Machine Learning Approaches Using NASA CMAPSS Dataset
preeclampsia	Impact of SMOTE Oversampling on Machine Learning Classifiers for Preeclampsia Prediction Under Severe Class Imbalance: Evidence from a Bulgarian Screening Cohort
Pressure Advance	Investigation of the Influence of the k-Factor Parameter on the Quality of Printed Parts Using Ingeo Biopolymer 4043D
pressure-controlled ventilation	Deep Learning Estimation of Mechanical Power in Pressure-Controlled Ventilation Using a 1D CNN–Bidirectional LSTM Model
Pretraining	Bidirectional Transformer Representations for Transferable Statistical Language Models
Privacy	Architecture and performance evaluation of real-time facial recognition for access control
privacy-preserving traceability	A Governance-Aware, Privacy-Preserving, Event-Driven Conceptual Model for Supply Chain Traceability
proactive cyber security	Cyber response automation with dedicated AI agents
Probability of detection (POD)	Assessment of Non-Destructive Testing Techniques for Detecting Fatigue Cracks in Railway Suspension Pivot Pins
Probability of failure-free operation	A Priori Reliability of Electrical Machines and Its Verification by Testing
process flow chart	An investigation into the elemental composition and develop-ment of a scheme that is efficient in the enrichment of cop-per-bearing ores from the Yoshlik deposit (Uzbekistan)
Prometheus	Implementing SLI/SLA/SLO Metrics in an ASP.NET 8 Microservices Architecture Using OpenTelemetry and Prometheus
protected natural areas and species	Technology for Managing and Grouping Datasets regarding Protected Natural Areas and Species
PROV-O	A Governance-Aware, Privacy-Preserving, Event-Driven Conceptual Model for Supply Chain Traceability
provenance	A Governance-Aware, Privacy-Preserving, Event-Driven Conceptual Model for Supply Chain Traceability
punch	Simulation Modelling of a Closed-Die Cold Forging Process by Use of the QForm Specialised Software
PyQGIS	Implementation and evaluation of the shortest-path algorithm for GIS Network Routing
Q
QGIS	Implementation and evaluation of the shortest-path algorithm for GIS Network Routing
quality control	Investigation of Optimal Temperature Parameters in ABS Additive Printing
quantitative evaluations	Analytical Recommendation for the Battery Capacity of a Photovoltaic System
Quantum Computing	Quantum Machine Learning for Enhanced Cardiovascular Disease Risk Prediction
R
radiometer	Instrumentation used for VHF solar burst observations at the Bulgarian Antarctic Base during Solar Cycle 25.
RAG	Automated Assessment of Cognitive Levels in Bloom's Taxonomy through RAG-Based Architecture with LLMs
rail steel blooms	Transient Numerical Simulation of Reheating Furnace Behavior for Continuous Casting Rail Steel Blooms Prior to Rolling
random forest	Machine Learning-Based Heart Disease Prediction: A Comparative Analysis with Feature Importance Evaluation Predictive Maintenance via Remaining Useful Life Estimation in Jet Engine Systems: A Comparative Analysis of Machine Learning Approaches Using NASA CMAPSS Dataset
Reactive Programming	AutoSignal: A Dart-based Programming Paradigm for Automatic Component Connection via Signal-Slot Architecture
real-time systems	Architecture and performance evaluation of real-time facial recognition for access control
real-world driving	An Experimental Setup for Collecting Physiological Data from Vehicle Drivers
Reduce exhaust emissions	Emissions and Dynamics: The Role of Software in Similar Automotive Platforms
redundant information	A Classification of Sensor Data Fusion Methods: Concepts and Recent Advances
reheating furnace	Transient Numerical Simulation of Reheating Furnace Behavior for Continuous Casting Rail Steel Blooms Prior to Rolling
Reliability	A Priori Reliability of Electrical Machines and Its Verification by Testing
reliability characteristics	Expediency Assessment Of An Information System Based On The Reliability Characteristics Of Its Elements
remaining useful life	Predictive Maintenance via Remaining Useful Life Estimation in Jet Engine Systems: A Comparative Analysis of Machine Learning Approaches Using NASA CMAPSS Dataset
Remote monitoring and control	Design and development of a microcontroller board for environmental control and device management
Renewable Energy	Data driven electricity forecasting for small grid tied photovol-taic power plants in the transition from centralized to distributed generation
renewable energy sources	Minimizing the grid energy component when charging electric vehicles
renewable source	A combined approach for design concept variants assessment of a hydropower system
resonance analysis	Frequency-Domain Modal Characterization and Multi-Injection Resonance Assessment of a Zeta DC–DC Converter
rheological properties:	Rheological Properties of Bitumen Modified with Crumb Rubber and Devulcanized Rubber
Ride Comfort Analysis	Design and Feasibility Assessment of Implementing a Pneumatic Suspension System in a Vehicle with a Conventional Suspension System
road safety	Driver Visibility and Pedestrian Detection Distance in Nighttime Traffic Accident Reconstruction
Robustness analyses	A Fractal-Inspired Supervisory Layer for Robust PI Control of DC–DC Buck Converters
rotor blade dynamic responses	Assessment of Flutter Stability Constraints and the Impact on the Helicopter Rotor Aeroelastic Characteristics
Roughness	Experimental Determination of Mechanical Characteristics: Hardness and Roughness of PolyJet Test Bodies for Digital ABS Plus Material
roundabout	Conducting an Assessment of the Operational Characteristics of an Existing Roundabout and a Comparative Analysis with Other Types of Intersections
route optimization	Implementation and evaluation of the shortest-path algorithm for GIS Network Routing
running safety	Enhancing the Load Capacity of Flat Wagons: Theoretical Justification and Dynamic Simulation of a Prototype Three Axle Bogie
S
S235JR	Investigation of the Corrosion of Steel S235JR in Common Beverages
SAE 0W-20 engine oil	Aging Behavior and Wear Metal Evolution of Low-Viscosity SAE 0W20 Engine Oil during the First Service Interval
Sand casting	Application of 3D Printed Patterns in Sand Casting
Security
sensor	A Classification of Sensor Data Fusion Methods: Concepts and Recent Advances
sensors	A Portable IoT-Enabled System for Georeferenced Soil Nutrient Screening in Agricultural Fields
service diagnostics	Analytical study of methods and diagnostic tools for evaluating automotive brake fluid quality under operational conditions
Shore D hardness test	Mechanical Characterization of PETG/TPU Multi-Material 3D-Printed Samples and Fabrication of a Test Part
shortest path	Implementation and evaluation of the shortest-path algorithm for GIS Network Routing
Signal Processing	Unsupervised Categorization of Hysteresis Loops: A Comparative Study of Expert-Driven Feature Engineering vs. Deep 1D-Convolutional Autoencoders
Signal-Slot Architecture	AutoSignal: A Dart-based Programming Paradigm for Automatic Component Connection via Signal-Slot Architecture
simulation modelling	Simulation Modelling of a Closed-Die Cold Forging Process by Use of the QForm Specialised Software
Single Day-Ahead Coupling	Blockchain for EUPHEMIA Market Transparency
Single-use cup	Design and technology development of an innovative biode-gradable single-use cup
Site Reliability Engineering	Implementing SLI/SLA/SLO Metrics in an ASP.NET 8 Microservices Architecture Using OpenTelemetry and Prometheus
SLA	Implementing SLI/SLA/SLO Metrics in an ASP.NET 8 Microservices Architecture Using OpenTelemetry and Prometheus
SLI	Implementing SLI/SLA/SLO Metrics in an ASP.NET 8 Microservices Architecture Using OpenTelemetry and Prometheus
SLO	Implementing SLI/SLA/SLO Metrics in an ASP.NET 8 Microservices Architecture Using OpenTelemetry and Prometheus
Smart campus	Design and Implementation of a FIWARE-Based Education Smart Data Model for University Campus Management
SMOTE	Impact of SMOTE Oversampling on Machine Learning Classifiers for Preeclampsia Prediction Under Severe Class Imbalance: Evidence from a Bulgarian Screening Cohort
soaking uniformity	Transient Numerical Simulation of Reheating Furnace Behavior for Continuous Casting Rail Steel Blooms Prior to Rolling
Software management role	Emissions and Dynamics: The Role of Software in Similar Automotive Platforms
solar burst detection	Instrumentation used for VHF solar burst observations at the Bulgarian Antarctic Base during Solar Cycle 25.
sorting	Low-cost automation system for sorting parts of type “Connector”
space weather	Instrumentation used for VHF solar burst observations at the Bulgarian Antarctic Base during Solar Cycle 25.
spatial network analysis	Implementation and evaluation of the shortest-path algorithm for GIS Network Routing
spectral analysis	Identification of the Natural Frequencies of a MacPherson Suspension Using FFT, FRF, and Spectral Analysis
spectral measurement	Instrumentation used for VHF solar burst observations at the Bulgarian Antarctic Base during Solar Cycle 25.
spectrometer	Instrumentation used for VHF solar burst observations at the Bulgarian Antarctic Base during Solar Cycle 25.
SQL	SQL Database Optimization as a Driver for SME Digital Transformation: A Case Study in the PV Sector
Stagger	Quantifying Tram Overhead Contact Line Stagger and Its Impact on Carbon Strip Wear
stanchion	Investigation of the Power Characteristics of a Photovoltaic Power Plant in Relation to Daylight Duration
statistical analysis	Investigation of the Corrosion of Steel S235JR in Common Beverages
statistical process control	Investigation of Optimal Temperature Parameters in ABS Additive Printing
steel	Investigation of the Corrosion of Steel S235JR in Common Beverages
steels	Influence of Chemical Composition on Microstructure and Hardness of 24Cr–Ni Steels Alloyed with Nitrogen
stochastic	Research on the Time Mutability Method for Stochastic Objects Drift Velocity Measurement - a review
storage modulus:	Rheological Properties of Bitumen Modified with Crumb Rubber and Devulcanized Rubber
students’ time management	Integrating Automated Notifications and Geospatial Navigation into a Mobile Platform to Support Higher Education
sudden illnesses	An Experimental Setup for Collecting Physiological Data from Vehicle Drivers
sulfide	An investigation into the elemental composition and develop-ment of a scheme that is efficient in the enrichment of cop-per-bearing ores from the Yoshlik deposit (Uzbekistan)
supercomputers	AI Factories as the backbone for driving AI ecosystem in EU
supply chain traceability	A Governance-Aware, Privacy-Preserving, Event-Driven Conceptual Model for Supply Chain Traceability
Support Vector Machines	Quantum Machine Learning for Enhanced Cardiovascular Disease Risk Prediction
Suspension Design Optimization	Design and Feasibility Assessment of Implementing a Pneumatic Suspension System in a Vehicle with a Conventional Suspension System
Suspension Retrofit	Design and Feasibility Assessment of Implementing a Pneumatic Suspension System in a Vehicle with a Conventional Suspension System
Switched Reluctance Motor (SRM)	Simulation and experimental investigation of an SRM drive in motoring mode
synergistic information	A Classification of Sensor Data Fusion Methods: Concepts and Recent Advances
synthetic data	A Hybrid Synthetic Dataset Generation for Robust Document Recognition Using Image Rendering and Domain Randomization
System	Constructive approach to the design of data protection systems. Models and transformation
system design	Integrating the Approach of Adjustable Reliability into the System Development Life Cycle
System Development Life Cycle (SDLC)	Integrating the Approach of Adjustable Reliability into the System Development Life Cycle
T
TDNN	Small Voice Bulgarian Language Model Generation Based on Vosk-Type Methods and Algorithms
technical operation	Analytical study of methods and diagnostic tools for evaluating automotive brake fluid quality under operational conditions
Techno-Economic Feasibility	Design and Feasibility Assessment of Implementing a Pneumatic Suspension System in a Vehicle with a Conventional Suspension System
technology	Technology for Managing and Grouping Datasets regarding Protected Natural Areas and Species
tensile strength	Tensile testing at elevated temperatures of PolyJet Digital ABS Plus material The Influence of Infill Direction on the Tensile Strength of FDM 3D-printed ABS produced at high speed
texture fusion	A Hybrid Synthetic Dataset Generation for Robust Document Recognition Using Image Rendering and Domain Randomization
theory of inertial navigation	Compensations for Horizontal Inertial Components of INS/GNSS with Flight Altitude
three axle bogie	Influence of Three-Axle Bogie Geometric Parameters on Inter-action Forces and Derailment Safety
three-axle bogie	Enhancing the Load Capacity of Flat Wagons: Theoretical Justification and Dynamic Simulation of a Prototype Three Axle Bogie
Time	Research on the Time Mutability Method for Stochastic Objects Drift Velocity Measurement - a review
time series	Time series analysis of the behavior of wild animals using camera traps Technology for Managing and Grouping Datasets regarding Protected Natural Areas and Species
TMIS
tool orchestration with MCP	Cyber response automation with dedicated AI agents
tool wear	Prediction of Cutting Tool Wear in Turning
tool wear prediction	Prediction of Cutting Tool Wear in Turning
total base number	Aging Behavior and Wear Metal Evolution of Low-Viscosity SAE 0W20 Engine Oil during the First Service Interval
TPU	Mechanical Characterization of PETG/TPU Multi-Material 3D-Printed Samples and Fabrication of a Test Part
traffic accident	Driver Visibility and Pedestrian Detection Distance in Nighttime Traffic Accident Reconstruction
Traffic Flows	Research of Traffic Delays Caused by Pedestrian Crossing at a Light Regulated Intersection: Case Study of City of Sofia
Traffic Jams	Research of Traffic Delays Caused by Pedestrian Crossing at a Light Regulated Intersection: Case Study of City of Sofia
Tram Overhead Line	Quantifying Tram Overhead Contact Line Stagger and Its Impact on Carbon Strip Wear
transfer functions	A Study and Small-Signal Modeling of a Two-Switch Buck–Boost Converter Considering Parasitic Elements
Transfer Learning	Bidirectional Transformer Representations for Transferable Statistical Language Models
Transformation	Constructive approach to the design of data protection systems. Models and transformation
Transformer	Bidirectional Transformer Representations for Transferable Statistical Language Models
transmittance	Investigation of Overall Light Transmittance of PETG Material
transparency	Investigation of Overall Light Transmittance of PETG Material
turning	Prediction of Cutting Tool Wear in Turning
Type-Safe Connections	AutoSignal: A Dart-based Programming Paradigm for Automatic Component Connection via Signal-Slot Architecture
U
UAVs coaxial scheme	Applications of Twin Counter–Rotating Common–Axis Rotor Systems in Modern Rotorcraft and UAVs
Ultrasonic testing	Assessment of Non-Destructive Testing Techniques for Detecting Fatigue Cracks in Railway Suspension Pivot Pins
Ultrasound	Assessment of Accuracy in Measuring Distance with Ultra-sound
UMAP	Unsupervised Categorization of Hysteresis Loops: A Comparative Study of Expert-Driven Feature Engineering vs. Deep 1D-Convolutional Autoencoders
unique information	A Classification of Sensor Data Fusion Methods: Concepts and Recent Advances
Univer-sal Mechanism	Enhancing the Load Capacity of Flat Wagons: Theoretical Justification and Dynamic Simulation of a Prototype Three Axle Bogie
unsupervised learning	Anomaly Detection in ADS-B Air Traffic Data Using Distributed Machine Learning
upper-limb biomechanics	Optimizing Computer Mouse Shells Design Based on Viet-namese Student Anthropometry
V
Vehicle Dynamics	Design and Feasibility Assessment of Implementing a Pneumatic Suspension System in a Vehicle with a Conventional Suspension System
velocity	Research on the Time Mutability Method for Stochastic Objects Drift Velocity Measurement - a review
velocity field	Investigation of Airflow Parameters in a G-Shaped Channel
Venturi channel	Influence of a Confuser–Diffuser Channel on the Energy Effi-ciency of an Idealized Theoretical Model of a Wind Turbine
Vision Transformer	Adversarial Robustness and Explainability in AI-Generated Face Detection
visual analytics	Web-based financial diary: architecture, functionalities and application for personal finance management
voice language	Small Voice Bulgarian Language Model Generation Based on Vosk-Type Methods and Algorithms
volatility	Electric Power Consumption Forecasting In Bulgaria
Vosk	Small Voice Bulgarian Language Model Generation Based on Vosk-Type Methods and Algorithms
W
water wheel	A combined approach for design concept variants assessment of a hydropower system
web application	Web-based financial diary: architecture, functionalities and application for personal finance management
Welding	Manufacturing Technologies Comparison for Nozzles
WFST	Small Voice Bulgarian Language Model Generation Based on Vosk-Type Methods and Algorithms
wheelbase optimization	Influence of Three-Axle Bogie Geometric Parameters on Inter-action Forces and Derailment Safety
wild animals	Time series analysis of the behavior of wild animals using camera traps
wind turbine	Investigation of Airflow Parameters in a G-Shaped Channel
wind turbine efficiency	Influence of a Confuser–Diffuser Channel on the Energy Effi-ciency of an Idealized Theoretical Model of a Wind Turbine
wind-tunnel	Wind tunnel experiment and analysis of aerodynamic characteristics of eVTOL aircraft
wing–propeller lifting system	Wind tunnel experiment and analysis of aerodynamic characteristics of eVTOL aircraft
wood parquet	Experimental assessment of formaldehyde gas emissions from laminate and solid parquet under simulated fire conditions
wеаr-rеsistаnt аllоys	Influеncе оf Chеmicаl Cоmpоsitiоn оn Micrоstructurе аnd Hаrdnеss оf High-Chrоmium Cаst Irоns
Y
YOLOv8n model	Time series analysis of the behavior of wild animals using camera traps
Z
Zeolite	Design and technology development of an innovative biode-gradable single-use cup
Zero-Knowledge Proofs	Blockchain for EUPHEMIA Market Transparency
Zeta DC–DC converter	Frequency-Domain Modal Characterization and Multi-Injection Resonance Assessment of a Zeta DC–DC Converter
zk-STARKs	Blockchain for EUPHEMIA Market Transparency

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