Philip Mavrepis

Mr. Philip Mavrepis

University of Piraeus, Piraeus, Attikí, Greece
+1
orcid

Research Focus & Metrics

Academic Career Length

7Years (2020-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

View All Publications

7 May 2022 in Remote Sensing
Verified
Journal Article
Open access
PDF file
Branislav PejakBranislav Pejak
Branislav Pejak
PLPredrag Lugonja
Predrag Lugonja
AAAleksandar Antić
Aleksandar Antić
Marko Neven PanićMarko Neven Panić
Marko Neven Panić
MPMiloš Pandžić
Miloš Pandžić
VCVladimir Crnojević
Vladimir Crnojević
Agriculture is the backbone and the main sector of the industry for many countries in the world. Assessing crop yields is key to optimising on-field decisions and defining sustainable agricultural strategies. Remote sensing applications have greatly enhanced our ability to monitor and manage farming operation. The main objective of this research was to evaluate machine learning system for within-field soya yield prediction trained on Sentinel-2 multispectral images and soil parameters. Multispectral images used in the study came from ESA’s Sentinel-2 satellites. A total of 3 cloud-free Sentinel-2 multispectral images per year from specific periods of vegetation were used to obtain the time-series necessary for crop yield prediction. Yield monitor data were collected in three crop seasons (2018, 2019 and 2020) from a number of farms located in Upper Austria. The ground-truth database consisted of information about the location of the fields and crop yield monitor data on 411 ha of farmland. A novel method, namely the Polygon-Pixel Interpolation, for optimal fitting yield monitor data with satellite images is introduced. Several machine learning algorithms, such as Multiple Linear Regression, Support Vector Machine, eXtreme Gradient Boosting, Stochastic Gradient Descent and Random Forest, were compared for their performance in soya yield prediction. Among the tested machine learning algorithms, Stochastic Gradient Descent regression model performed better than the others, with a mean absolute error of 4.36 kg/pixel (0.436 t/ha) and a correlation coefficient of 0.83%.

15 October 2020
Verified
Book Chapter
Closed access
PDF file
GMGeorgios Makridis
Georgios Makridis
Philip MavrepisPhilip Mavrepis
Philip Mavrepis
DKDimosthenis Kyriazis
Dimosthenis Kyriazis
IPIoanna Polychronou
Ioanna Polychronou
SKStathis Kaloudis
Stathis Kaloudis

18 December 2025 in Journal on Computing and Cultural Heritage
Verified
Journal Article
Open access
EAEmmanouil Alexakis
Emmanouil Alexakis
ARAlexandros Raikos
Alexandros Raikos
Philip MavrepisPhilip Mavrepis
Philip Mavrepis
ARAntonis Rifios
Antonis Rifios
Dimosthenis KyriazisDimosthenis Kyriazis
Dimosthenis Kyriazis
Antonia MoropoulouAntonia Moropoulou
Antonia Moropoulou
This study introduces an Integrated Information System (IIS) for the management, analysis, and visualization of Cultural Heritage (CH) data. Emphasizing the critical importance of digital technologies for the preservation, accessibility, and understanding of CH assets, the article presents a comprehensive case study of the Holy Aedicule of the Holy Sepulchre. It highlights the necessity for a unified system that efficiently integrates diverse data types and analytical methods. The proposed web-based platform is designed to support various stakeholders by providing advanced tools for data management, analytics, and visualization, thereby facilitating the sustainable preservation and educational utilization of CH assets. Through this framework, the study contributes to the advancement of CH management practices, addressing both current challenges and anticipating future needs.