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Μελέτη διώροφου κτιρίου
No full textThe present thesis focuses on the structural study of a two-story reinforced concrete building, employing specialized software tools for its analysis and design. The primary aim is to present a simplified yet comprehensive procedure that familiarizes students with these programs while demonstrating their connection to university coursework.
The study addresses key aspects of building construction, including the applicable standards and regulations (Eurocodes), the materials used, and the analytical methods employed, (modal response spectrum method), highlighting their impact on the design process. Using dedicated software, a three-dimensional model of the building was developed, and following a thorough analysis, the reinforcement requirements of the structural elements were calculated. Manual verifications were concurrently performed to compare and validate the software results. Subsequently, the necessary performance checks were conducted to ensure compliance with Eurocode requirements. Finally, the completed design drawings are presented, constituting the final product of the design process, including dimensions, reinforcement details, and essential construction specifications to guarantee the safe and efficient execution of the building.Σκοπός της παρούσας εργασίας είναι η μελέτη ενός διώροφου κτηρίου κατασκευασμένου από οπλισμένο σκυρόδεμα, με τη χρήση κατάλληλων λογισμικών για την ανάλυση και τον σχεδιασμό του. Η εργασία αποσκοπεί στην παρουσίαση μιας όσο το δυνατόν απλουστευμένης διαδικασίας, η οποία στοχεύει στην εξοικείωση των φοιτητών με τα εν λόγω προγράμματα, προβάλλοντας παράλληλα τη σύνδεσή τους με τα μαθήματα του πανεπιστημίου.
Στο πλαίσιο της μελέτης, εξετάζονται οι κύριες πτυχές της διαδικασίας κατασκευής ενός κτηρίου, τα πρότυπα και οι κανονισμοί (Ευρωκώδικες) που λαμβάνονται υπόψη, τα χρησιμοποιούμενα υλικά, και οι μέθοδοι ανάλυσης της κατασκευής (Ιδιομορφική μέθοδος φάσματος απόκρισης) , καθώς και ο τρόπος με τον οποίο αυτά επηρεάζουν τον σχεδιασμό. Με τη βοήθεια του λογισμικού προγράμματος πραγματοποιήθηκε η τρισδιάστατη μοντελοποίηση του κτηρίου και μετά την ολοκληρωμένη ανάλυση του, υπολογίστηκαν οι απαιτήσεις οπλισμού των δομικών στοιχείων. Παράλληλα της διαδικασίας διενεργούνται χειρόγραφοι έλεγχοι προκειμένου να γίνει η σύγκριση και επαλήθευση των αποτελεσμάτων που προκύπτουν από το λογισμικό. Ακολούθως, πραγματοποιούνται οι απαραίτητοι έλεγχοι επιτελεστικότητας, προκειμένου να διασφαλιστεί η συμμόρφωση του κτηρίου με τις απαιτήσεις των Ευρωκωδίκων. Καταλήγοντας, παρουσιάζονται τα τελικά σχέδια τα οποία αποτελούν το τελικό προϊόν της μελετητικής διαδικασίας και περιλαμβάνουν τις διαστάσεις, τον οπλισμό, καθώς και τις απαραίτητες λεπτομέρειες κατασκευής, ώστε να διασφαλίζεται η ασφαλής και αποδοτική υλοποίηση του κτηρίου.Complete
Rethinking mental healthcare: operationalising intersectionality through a community-driven social clinic model
No full textHere we examine the critical need for rethinking mental healthcare through a social clinic model, informed by intersectional equity perspective. Drawing on insights from the INtersectional Network Of community and stakeholder Voices, And research to Tackle (in)Equities (INNOVATE) project, we highlight significant gaps in current mental health services, including fragmentation, stigmatisation, and lack of person-centred care. Intersectionality recognises intersecting disadvantages that shape differential mental healthcare access and outcomes. By applying an intersectionality lens, we reveal how overlapping forms of disadvantage arising from social positions such as race and ethnicity, gender, geography, and immigration status interact with social drivers like socio-economic deprivation, legal status, and exclusion to create complex barriers to accessing care. For instance, young people in remote areas, asylum seekers with housing insecurity and experiencing disability, and those in socioeconomically deprived areas carry a disproportionate burden of poor mental health in Essex, UK. Social clinics, as autonomous, self-managed centres that combine medical care with social support and community participation, constitute a promising approach to reduce the gap. We argue for a community-led process of the integration of intersectionality into community engagement processes for establishing and implementing social clinics to build sustainable, inclusive, and responsive mental health services. We propose a five-step framework for operationalising this model, centred around co-design, collective action, and participatory governance, aiming to address power asymmetries and promote equity in mental health service delivery
Data Lake Semantic Enrichment via Traditional Systems and LLMs
No full textIn todays era, Big Data is often referred to as the ”new oil”. Businesses heavily rely on Data Lakes to
store massive amounts of heterogeneous data, however without proper metadata mechanisms in place,
these repositories turn into data swamps. This thesis explores alternative systems for traditional semantic
enrichment of data sources by adapting a pre-existing semantic blueprint model in Apache Hive and comparing
it in terms of insertion time, query performance and storage efficiency against a well established
system, Apache Jena. Experimental results show that Hive offers significant scalability and storage efficiency
benefits over Jena, however Jena is more suitable for small to medium-size Data Lakes that require
dynamic schema evolution, complex relationships between data sources and perform infrequent queries
for metadata retrieval. Additionally, this thesis explores the feasibility of LLM-driven approaches for
semantic enrichment by proposing two novel pipelines and evaluating four different configurations. The
results demonstrate that LLMs can be used as an alternative solution but often rely on high quality metadata
to produce maximum accuracy. Expert-curated metadata produced the highest accuracy and low
response times, while LLM-generated metadata offered a promising, semi-automated alternative with
important trade offs. Finally, FAISS-based retrieval excelled in reducing operational costs as well as
response times.Complete
Υλοποίηση πλατφόρμας για την δημιουργία παιχνιδιών σοβαρού σκοπού
No full textThis bachelor thesis presents the design and development of a general-purpose web platform for the creation and management of serious games. The games are based on speech therapy activities and aim to support therapists in digitizing and organizing their therapy sessions. The starting point was the need of the University Rehabilitation Clinic for unified evaluation and training of children, aiming to reduce errors, improve data recording efficiency, and enable timely therapeutic decision-making for children with speech and learning difficulties. The platform allows the creation of games with scenarios and levels, user management, game execution, and session result recording. Additionally, it supports the import and export of game data through XML files. The development was based on web technologies such as PHP and JavaScript, while data storage was implemented using MySQL. The system can be utilized in therapeutic, educational, and research environments, offering flexibility and reusability.Η παρούσα πτυχιακή εργασία παρουσιάζει τον σχεδιασμό και την ανάπτυξη μιας διαδικτυακής πλατφόρμας γενικού σκοπού για τη δημιουργία και διαχείριση παιχνιδιών σοβαρού σκοπού. Τα παιχνίδια βασίζονται σε λογοθεραπευτικές δραστηριότητες και έχουν στόχο την υποστήριξη των θεραπευτών στην ψηφιοποίηση και οργάνωση των συνεδριών τους. Αφετηρία αποτέλεσε η ανάγκη της Πανεπιστημιακής Κλινικής Αποκατάστασης για ενιαία αξιολόγηση και εκπαίδευση παιδιών, με στόχο τη μείωση σφαλμάτων, την αποτελεσματικότερη καταγραφή δεδομένων και την έγκαιρη λήψη θεραπευτικών αποφάσεων για παιδιά με δυσκολίες λόγου και μάθησης. Η πλατφόρμα επιτρέπει τη δημιουργία παιχνιδιών με σενάρια και επίπεδα, τη διαχείριση χρηστών, καθώς και την εκτέλεση αυτών των παιχνιδιών και την καταγραφή των αποτελεσμάτων με την λήξη της συνεδρίας. Παράλληλα, υποστηρίζεται εισαγωγή και εξαγωγή δεδομένων παιχνιδιών μέσω XML. Η ανάπτυξη βασίστηκε σε τεχνολογίες διαδικτύου, όπως PHP και JavaScript, ενώ η αποθήκευση των δεδομένων υλοποιήθηκε με χρήση MySQL. Το σύστημα μπορεί να αξιοποιηθεί σε θεραπευτικά, εκπαιδευτικά και ερευνητικά περιβάλλοντα, προσφέροντας ευελιξία και επαναχρησιμοποίηση.Complete
Spatio-Temporal Diffusion Model for Satellite Imagery
No full textGenerative AI models have proven exceptionally useful for learning representations of the real world and creating novel data. The aim of this work is therefore the use of open-source data from satellites such as the Landsat and Sentinel series to learn the progression of landscapes over time under various influences and predict their potential future appearances using a diffusion model
Noise Characterization and Robust Signal Detection in Yeast Pheromone Molecular Communication
No full textA critical aspect of Molecular Communications (MC) is the implementation of signal detection policies amidst noise. To date, noise characterizations within the MC field have predominantly drawn from methodologies found in wireless communications literature. In this study, we diverge from existing MC research by utilizing a newly developed experimental platform that employs yeast, allowing us to consider more realistic noise characterizations based on the relevant signaling pathways. We propose suitable signal detection mechanisms tailored to this experimental setup, which focuses on yeast cell-to-cell communications. Our analysis identifies gene transcription as the primary source of noise, and we utilize a Markov birth-death process model with Poisson arrivals and departures to characterize it. The noisy expression of the FUS1 gene is best represented using a mixed Gaussian distribution model. This model serves as a foundation for evaluating the performance of Maximum Likelihood Detection mechanisms in terms of Bit Error Rate (BER) for both symbol-by-symbol and sequence transmission schemes. Error analysis indicates that appropriate adjustments to the signal threshold can reduce errors to as low as 10%, which is not negligible. In contrast, the detection of symbol sequences demonstrates enhanced error performance, achieving error rates as low as 0.4%, albeit at the cost of increased computational complexity.This work was supported by the Project BRIDGE2HORIZON/0823D/004 (YeasPSense) which is implemented under the Cohesion Policy Funds “THALIA 2021-2027” with EU co-fundin
From Digital Twin to Memory Twin: A Holistic Framework for Cultural Heritage Documentation, Interpretation, and Adaptive Reuse
No full textCultural heritage worldwide is increasingly at risk due to climate change, armed conflict, urbanisation, illicit trafficking, and the broader forces of globalisation. These natural and human-induced threats contribute to the irreversible loss of both tangible and intangible cultural assets. In response, heritage digitisation has advanced significantly - from basic 2D documentation to sophisticated 3D technologies - underscoring the urgent need for structured, ethically grounded methodologies in data acquisition.
This paper introduces the Memory Twin: an innovative framework that redefines digital heritage representation by integrating high-fidelity visuals with Paradata, Metadata, Data and intangible cultural values. Building on and extending the Holistic Historic Building Information Modelling (HHBIM) approach, the Memory Twin enriches digital heritage environments with narrative, emotional, and community-driven content, fostering inclusive access, transparency, and long-term cultural significance.
Developed within the framework of the EU-funded HERITALISE project, this paper explores both the theoretical foundations and practical application of the Memory Twin through a detailed case study of Villa Portelli in Malta. By integrating 3D scanning, archival research, oral histories, and participatory engagement, the project constructs a multi-dimensional digital portrayal of the site’s material, historical, and social layers.
Aligned with the FAIR (Findable, Accessible, Interoperable, Reusable) and CARE (Collective Benefit, Authority to Control, Responsibility, Ethics) principles, the Memory Twin ensures semantic interoperability, ethical stewardship, and community empowerment. It marks a paradigm shift in heritage digitisation - from static documentation toward participatory, value-driven preservation - offering a scalable, sustainable model for safeguarding cultural heritage amid global challenges
Quality Certification in Data Acquisition for Cultural Heritage: The Power of Paradata for High Quality Digital 3D Cultural Heritage Assets
No full textPublished in 2022, the European Commission’s study VIGIE 2020/654: Study on Quality in 3D Digitisation of Tangible Cultural Heritage provided a comprehensive overview of the state-of-the-art in Cultural Heritage (CH) digitisation, proposing detailed guidelines toward a standardised framework for evaluating digitisation projects. The Study introduced a key distinction between the Complexity of the data acquisition methodology and the Quality of the expected results. It argued that Quality can only be meaningfully assessed by understanding the preconditions - namely, the Complexity - surrounding data acquisition (DAQ). By managing risks, faithfully documenting paradata (i.e., the processes and methods used to create the digital record), and reducing DAQ complexity, confidence in the digitisation outcomes is increased and better reflected in the overall Quality of results.
In the rapidly evolving landscape of digital technologies and their application to the CH domain, alongside the growing need to monitor monuments and sites affected by natural and human-induced hazards and interventions, this article reflects on three years of real-world implementation. It reviews the lessons learnt, identifies existing gaps, and explores emerging technologies to enhance and adapt the Study to the current and future needs of the sector. These insights are essential to ensure the continued relevance and effective adoption of the Study’s recommendations
Assessing the Readiness for 15-Minute Cities: Spatial Analysis of Accessibility and Urban Sprawl in Limassol, Cyprus
No full textThis study evaluates Limassol’s readiness to adopt the 15-minute city model through a spatial accessibility and urban-form analysis. Using openly available geo-referenced Points of Interest (POIs), road network data, land-use records, and census information, we generated 15-minute walking and cycling isochrones for eight essential urban functions: Education, Food, Green Areas, Health, Services, Shopping, Tourism, and Transport. Residential coverage within each isochrone was calculated to assess accessibility equity across the city. Urban sprawl was quantified using size, density, and fragmentation metrics derived from historical planning zones. Results show that while cycling accessibility is high for most categories (85–95% of residential areas), walking accessibility is considerably lower and unevenly distributed, with several critical functions, particularly Green Areas, Education, and Transport, serving less than half of the residential zones. The analysis also reveals increasing spatial fragmentation and outward population shifts consistent with low-density sprawl, driven by planning policies and development pressures. These findings indicate that Limassol is only partially aligned with the principles of the 15-minute city, with significant gaps in walkable access and decentralized service provision. The study concludes that targeted planning reforms, improved active-mobility infrastructure, and polycentric redistribution of amenities are necessary for enhancing accessibility equity and advancing the city’s transition toward a more sustainable and human-scaled urban model
Μελέτη της έκλυσης μεταλλικών ιόντων από ιατρικά εμφυτεύματα
No full textMedical implants have a key application in modern medicine for restoring functions of the human body. However, their stay in the body may be accompanied by the release of metal ions, which in case of release of large quantities may lead to negative effects on the human body. In order to properly assess the corrosion and release of metal ions, important tools for modelling and simulation of the toxicological risk of medical devices have been developed to reduce clinical testing methods. In this thesis, an extensive literature review was initially performed to identify, categorize and group release data from non-living organism experiments in laboratory conditions (in vitro) and in living organism experiments (in vivo) implantation studies. Furthermore, a toxicokinetic model was parameterized to predict the time-dependent concentration of ions in organs, tissues and body fluids. Comparing the metal concentrations indicated by the model for nickel and chromium respectively, it was observed that the experimental data show good convergence compared to the model. However, there is a need to improve the model to achieve better and more accurate convergence, especially for nickel, to which the model was parameterized. In conclusion, there is potential to improve the model by introducing time-dependent parameters to simulate physiological phenomena such as the gradual change in absorption by tissues. More generally, however, linking experiments with mathematical modelling is a powerful tool for safety assessment in future research.Τα ιατρικά εμφυτεύματα έχουν βασική εφαρμογή στη σύγχρονη ιατρική για την αποκατάσταση λειτουργιών του ανθρώπινου σώματος. Ωστόσο, η παραμονή τους στον οργανισμό μπορεί να συνοδεύεται από έκλυση μεταλλικών ιόντων, γεγονός που σε περίπτωση απελευθέρωσης μεγάλων ποσοτήτων μπορεί να οδηγήσει σε αρνητικές επιδράσεις για τον ανθρώπινο οργανισμό. Για την σωστή αξιολόγηση της διάβρωσης και της απελευθέρωσης μεταλλικών ιόντων αναπτύχθηκαν σημαντικά εργαλεία μοντελοποίησης και προσομοίωσης του τοξικολογικού κίνδυνου των ιατρικών συσκευών με στόχο τη μείωση των κλινικών μεθόδων δοκιμών. Στην παρούσα πτυχιακή εργασία, αρχικά πραγματοποιήθηκε εκτενής βιβλιογραφική ανασκόπηση με στόχο τον εντοπισμό, την κατηγοριοποίηση και την ομαδοποίηση δεδομένων έκλυσης που προέρχονται από πειράματα εκτός του ζωντανού οργανισμού σε συνθήκες εργαστηρίου (in vitro) και σε πειράματα σε ζωντανούς οργανισμούς (in vivo) μελέτες εμφύτευσης. Τέλος, παραμετροποιήθηκε ένα τοξικοκινητικό μοντέλο με σκοπό την πρόβλεψη της χρονικά εξαρτώμενης συγκέντρωσης των ιόντων σε όργανα, ιστούς και σωματικά υγρά. Συγκρίνοντας τις μεταλλικές συγκεντρώσεις που ανέδειξε το μοντέλο για νικέλιο και χρώμιο αντίστοιχα, παρατηρήθηκε ότι τα πειραματικά δεδομένα παρουσιάζουν καλή σύγκλιση συγκριτικά με το μοντέλο. Ωστόσο, χρειάζεται να γίνει βελτίωση του μοντέλου ώστε να επιτευχθεί η καλύτερη και ακριβέστερη σύγκλιση, ιδιαίτερα για το νικέλιο, στο οποίο το μοντέλο είχε παραμετροποιηθεί. Συμπερασματικά, υπάρχει η δυνατότητα βελτίωσης του μοντέλου με την εισαγωγή χρονικά εξαρτώμενων παραμέτρων με σκοπό την προσομοίωση φυσιολογικών φαινομένων όπως η σταδιακή μεταβολή της απορρόφησης από τους ιστούς. Γενικότερα όμως, η σύνδεση πειραμάτων με μαθηματική μοντελοποίηση αποτελεί ισχυρό εργαλείο για την αξιολόγηση της ασφάλειας σε μελλοντικές έρευνες.Complete