Postdoctoral Research

Regulations

Regulation of Postdoctoral Research at the Aristotle University of Thessaloniki – Government Gazette B’ 1191/04-04-2017

Last Update:
March 3, 2021
10:45 pm

Amendment of the Regulation of Postdoctoral Research at the Aristotle University of Thessaloniki – Government Gazette B’ 267/27-01-2021

Last Update:
March 3, 2021
10:46 pm

Amendment of the Regulation of Postdoctoral Research at the Aristotle University of Thessaloniki – Government Gazette B’ 5867/6-10-2023

Last Update:
October 20, 2023
10:45 pm

Antenna design of radiofrequency energy harvesting systems for mobile and wireless communication networks

Researcher: Boursianis Achilleas
Advisory Committee:
- Sotirios Goudos (supervisor)
Abstract/Objectives:
The objective of this postdoctoral research is the study and design of antennas operating in mobile and wireless communication networks for RF energy harvesting applications. These antennas should meet several constraints regarding the reflection coefficient, input impedance, realized gain, size, and complexity. The antenna systems that will be designed in this research will operate in both outdoor and indoor environments.

The milestones of this postdoctoral research include the design of a) an antenna system operating in several frequency bands of the outdoor environment for RF energy harvesting applications and b) an antenna system operating in the Wi-Fi frequency band of the indoor environment for RF energy harvesting applications.

Automated near real time monitoring of aerosol species profiles, trace gas profiles, and cloud layers based on the synergy of remote sensing instruments

Researcher: Siomos Nikolaos
Advisory Committee:
- Dimitrios Balis (supervisor)
Abstract/Objectives:
The current research is focused on developing techniques and algorithms that can be applied for the automated and continuous near real time monitoring of aerosol species profiles (e.g. dust, smoke, volcanic ash), trace gas profiles (e.g. O3, NO2, HCHO) and cloud layers based on the synergy of remote sensing instruments.

Calculation of updated pollutant emission inventories over Europe

Researcher: Maria Elissavet Koukouli
Advisory Committee:
- Dimitrios Balis (supervisor)
Abstract/Objectives:
The research proposal by Dr Maria Elissavet Koukouli aims to optimize the current capabilities of existing air quality forecasting models by using satellite atmospheric monitoring data to provide regularly updated emission inventories for air pollutants over Europe.

Characterization of Polymer Composite Materials

Researcher: Evangelia Tarani
Advisory Committee:
- Konstantinos Chrissafis (supervisor)
Abstract/Objectives:
Focusing on the development of additive-reinforced composites is undoubtedly a particularly attractive prospect for manufacturing multifunctional materials. The combined exploitation of the advantages of the individual elements of composite materials is expected to lead to the creation of materials with targeted properties and excellent performances, giving them a high added value, as requested by both research and industry on a global scale. Therefore, this thesis aims to measure, understand, model, and predict the effect of realistic processing conditions on polymer matrix properties.

Comprehensive assessment of the synergistic impact of air quality and thermal conditions on human mortality in urban areas of South Mediterranean

Researcher: Dafni Parliari
Advisory Committee:
- Dimitrios Melas (supervisor)
Abstract/Objectives:
The exposure of urban residents of the Southern Mediterranean to high concentrations of air pollutants, combined with extreme temperatures, leads to an increased risk of mortality. Meanwhile, the impact of various environmental factors on human health is often assessed in a non-interactive manner, despite recent evidence suggesting synergy between them. The aim of this post-doctoral research is the broad application of Non-linear Distributed Lag Models within the framework of Generalized Additive Models to study the concurrent effects of thermal stress and air pollution on human mortality in the urban areas of the Southern Mediterranean in a standardized and comparable way.

Copper and Cerium or Nanostructured ceria coatings on titanium with antibacterial and anti-inflammatory properties

Deployment of Machine Learning-based Methods for Radio Propagation Prediction

Researcher: Sotirios Sotiroudis
Advisory Committee:
- Aikaterini (Katherine) Siakavara (supervisor)
Abstract/Objectives:
Machine learning-based methods for the prediction of propagation path loss in urban environments are deployed. Tabular data, as well as footprints of the built-up areas, are used as inputs. Image processing and Deep Learning techniques are applied. Moreover, effective combination of the standalone prediction models is being investigated through the implementation of Ensemble Learning methods.

Determination of trace elements and radionuclides concentrations close to lignite power plants in West Macedonia using the moss bag technique

Researcher: Chrysoula Betsou
Advisory Committee:
- Alexandra Ioannidou (supervisor)
Abstract/Objectives:
During this research, the concentrations of trace elements and radionuclides in mosses in the region of West Macedonia are studied. More specifically, mosses are placed in moss bags close to the lignite power plants in the region of West Macedonia, and the levels of trace elements and radionuclides are determined using nuclear methods (NAA, gamma spectrometry).

Development of a low power instrumentation system for earthquake monitoring

Researcher: Konstantakos Vasileios
Advisory Committee:
- Stylianos Siskos (supervisor)
Abstract/Objectives:
This research focuses on the study and implementation of instrumentation systems for earthquake monitoring, with modern commercial sensors, and modern instrumentation algorithms. Individual goals consist the optimal acquisition of linear acceleration characterized by low signal-to-noise ratio and low frequency and the development of an instrumentation system with modern power consumption behavior and with advanced embedded processing, storage and communication functionality.

Development of advanced methods for the assessment and analysis of satellite data of aerosol properties from polar orbit observations using lidar ground based remote sensing data

Development of technological nanomaterials based on industrial byproducts

Researcher: Symeonidis Konstantinos
Advisory Committee:
- George Vourlias (supervisor)
Abstract/Objectives:
The objective of this study is the synthesis of inorganic nanomaterials by using raw materials originating from industrial by-products (mining and manufacture processes e.g. dolomitic marbles, wood residuals, whitestone, dyes, adsorbents) and their incorporation in added value innovative products oriented to gas or water treatment as well as to the direct feeding of large construction formation.

Dynamics of extrasolar planetary systems

Researcher: Kyriaki Antoniadou
Advisory Committee:
- Georgios Vougiatzis (supervisor)
Abstract/Objectives:
Hitherto unprecedented detections of exoplanets have been triggered by missions and ground based telescopes. Dynamical studies can help ascertain information regarding the neighbourhood of exoplanets. In particular, the periodic orbits can lead to the identification of the regular domains in the phase space, where the long-term stability and hence, the survival of exoplanets can be guaranteed. Guided by the stable periodic orbits, we unveil such boundaries via maps of dynamical stability and either validate or constrain the observational data, which are oftentimes given with large deviations.

Electrochemical and strain Raman study of 2D materials

Researcher: Filintoglou Kyriakos
Advisory Committee:
- Konstantinos Papagelis (supervisor)
Abstract/Objectives:
Two- dimensional (2D) materials (graphene, TMDCs) have attracted attention recently due their unique physical properties. Doping and mechanical strain in 2D materials is a strategy to precisely control their electronic and optical properties, without causing any induced structural disorder. The sinngle and few layer 2D materials are grown by CVD method and are mainly investigated by Raman spectroscopy.

Evaluation of the CloudSat products with ACTRIS lidar/radar measurements over the Eastern Mediterranean

Researcher: Kalliopi-Artemis Boudouri
Advisory Committee:
- Dimitrios Balis (supervisor)
Abstract/Objectives:
Aim of this research is to evaluate the NASA CloudSat products using ground-based measurements performed in ACTRIS stations. Combined ground-based lidar-radar observations performed in the framework of the PRE-TECT experiment during April 2017 at the Greek Atmospheric Observatory are used to evaluate the CloudSat performance in detecting hydrometeors. Moreover, ground-based lidar measurements performed with THEssaloniki’s Lidar SYStem will be used for evaluating CloudSat performance in detecting ice crystals clouds.The outcome of this work is a step towards the use of CloudSat products for performing a decade-long cloud statistical analysis over the poorly studied East Mediterranean region and to evaluate the upcoming EARTHCARE algorithms and cloud products.

Ferroelectric and topological materials characteristics from first principles with the aid of advanced data processing techniques

Researcher: Eleni Chatzikyriakou
Advisory Committee:
- Joseph Kioseoglou (supervisor)
Abstract/Objectives:
In this project, we are studying the dynamical lattice properties of 2D ferroelectric and topological materials, such as phonon effects, as well as electronic transport and optical conductivity. We are using high throughput techniques for handling the number of simulations. Our results open the route to the use of Machine Learning methods in ferroelectric materials research, a field that has been explored very little.

Generalized Bragg Law in Higher Dimensions and Applications of Bosonization Theories in Condensed Matter Physics

Researcher: Filothodoros Evangelos
Advisory Committee:
- Anastasios Petkou (supervisor)
Abstract/Objectives:
In this research proposal, four clear and timely questions / problems have been set that will lead us to new directions. They are challenges from a mathematical point of view, as well as from a physical point in directions related to Physics of higher dimensions at finite temperatures, Crystallography issues about hyperbolic crystals and radiation scattering theories by introducing a Generalized Bragg Law and mathematical innovations that will help us to understand the properties of Clausen and Bloch-Wigner-Ramakrishnan functions.

Gravitational waves from neutron stars

Researcher: Pnigouras Pantelis
Advisory Committee:
- Charalampos Moustakidis (supervisor)
Abstract/Objectives:
Our main objective is to study how neutron star oscillations and tidal effects in neutron star binaries influence the gravitational-wave emission and the neutron star evolution, in order to obtain information about the (otherwise inaccessible) neutron star interior, i.e., about the dense nuclear matter equation of state. The role of nonlinear interactions among stellar oscillation modes and their implications are the main focus of this study.

High spatiotemporal resolution atmospheric constituents analysis based on geostationary satellite orbits

Researcher: Maria Elissavet Koukouli
Advisory Committee:
- Dimitrios Balis (supervisor)
Abstract/Objectives:
The main aim of this research is to develop the tools required to analyse high spatiotemporal resolution observations of atmospheric constituents sensed by instruments on a geostationary orbit, as well as to perform quality assessment and validation of these observations. Αir quality monitoring from geostationary orbits is a very recent development in the field rendering the extensive validation and analysis of these observations paramount. Since the Sentinel-4 UVNS instrument, which will cover the European domain, is due for launch in 2024, this study focused on the development of the necessary algorithms for the GEMS/KOMPSAT-B instrument, which observes the Asian domain from 2020 onwards.

Investigating the interaction between sea breeze and urban heat island effect in the city of Thessaloniki

Researcher: Stavros Keppas
Advisory Committee:
- Dimitrios Melas (supervisor)
Abstract/Objectives:
The present research aims to study the phenomenon of Urban Heat Island (UHI) in the urban and suburban areas of the city of Thessaloniki. This will be achieved through the use of a densely distributed network of meteorological stations (>1 station per 1 km^2), which will be correlated with land use. Simultaneously, the residents’ discomfort levels in various areas will be assessed. As the sea breeze mechanism is an integral part of the city’s climatology, the intensity and extent of the sea breeze’s impact will be investigated, along with its interaction with the UHI. Finally, an analysis of all the aforementioned mechanisms and phenomena will be conducted during heatwave episodes to identify areas with the highest and lowest levels of burden.

Multi-Objective Optimization in Massive MIMO Networks

Optimizing Magnetic Hyperthermia through adequate combination of particles and fields

Researcher: Eirini Myrovali
Advisory Committee:
- Mavroeidis Angelakeris (supervisor)
Abstract/Objectives:
In this work we address Magnetic Particle Hyperthermia, an alternative cancer treatment, based on the heat released by magnetic nanoparticles whenever subjected to Alternating Magnetic Field. The samples are prepared by coprecipitation aqueous method, while a further post-synthetic step includes their 3D assembly in linear chains under the guidance of a bias static field inside an agarose matrix that mimic tissue features as a tool to optimize their heating efficiency

Study of microparticle composition and the existence of exotic matter in neutron stars

Study of nonlinear dynamical systems with hidden attractors

Researcher: Maaita Jamal-Odysseas
Advisory Committee:
- Efthymia Meletlidou (supervisor)
Abstract/Objectives:
Systems with hidden attractors are called dynamical systems that are studied in regions far from equilibrium points. Hidden attractors are a modern field of research with great prospects. In our research we intend to expand the study of hidden attractions in three main directions: 1. Use of analytical methods. 2. Systems of higher dimensions. 3. Applications in mechanical systems and new areas of natural problems.

Study of the interaction of Aerosols and Clouds in the Eastern Mediterranean region with the synergistic use of groundbased and satellite remote sensing systems

Researcher: Voudouri Kalliopi-Artemis
Advisory Committee:
- Dimitrios Balis (supervisor)
Abstract/Objectives:
Aim of this work is to provide a detailed characterization of the aerosol cloud interactions above Eastern Mediterranean as well as the effect of the different atmospheric conditions.
The synergistic information of groundbased and satellite remote sensing instruments will provide a full aerosol characterization above the study area and a better understanding of the aerosol-cloud interactions in the field of heterogeneous ice formation.

Studying the carbon cycle in evolved molecular clouds and identifying the most appropriate tracer for molecular gas in galaxies

Researcher: Bisbas Thomas
Advisory Committee:
- Padelis Papadopoulos (supervisor)
Abstract/Objectives:
The goal of this project is to study the full carbon cycle in relation to the atomic-to-molecular transition in different environments of the interstellar medium and understand its properties in the low- and high- redshift Universe. The main objective is to fully investigate the utilities of the ionized and atomic carbon as accurate and alternative tracers of the molecular gas in the wider context of extragalactic observations. We will also build an online interactive platform and a publicly available database consisting of the outputs of this project.

Synthesis of an antenna system (rectenna) for harvesting ambient microwave radiation

Researcher: Mourtzios Christos
Advisory Committee:
- Aikaterini (Katherine) Siakavara (supervisor)
Abstract/Objectives:
The proposed postdoctoral research aligned with the evolution of Wireless Energy Harvesting (W.E.Η.) technology, will focus on the synthesis of innovative RF energy harvesting antenna systems (“rectenna”), which will meet the required specifications, in order to power wireless sensors. The rectenna will include a novel antenna, a rectifier and a custom matching network.

The natural radionuclide 7Be as a tracer in the study of the hydrodynamics of artificial wetlands

Researcher: Eleftheria Ioannidou
Advisory Committee:
- Alexandra Ioannidou (supervisor)
Abstract/Objectives:
The object of the study is the use of a natural radioactive tracer (7Be) to study and simulate the hydrodynamic behavior of artificial wetlands (constructed wetlands, CWs), which are an environmentally friendly method for the treatment of wastewater (industrial, urban and other). Simulation scenarios will be applied to theoretical and existing artificial wetland(s) in order to determine the optimal boundary conditions and available simulation codes that will yield the optimal artificial wetland decontamination technique.

The three—body problem (“Retrogarde” Periodic Orbits)— An application to the asteroid belt and to the Kuiper belt

Researcher: Thomas Kotoulas
Advisory Committee:
- Georgios Vougiatzis (supervisor)
Abstract/Objectives:
We study the dynamics of Kuiper—belt objects which are located in exterior mean motion resonances with Neptune and they have been observed at very high inclination (i>90°). The basic model is the restricted 3-body problem. We find planar and three—dimensional retrograde periodic orbits and study their stability type. We shall produce dynamical stability maps in the diagrams a—e or i—e in order to study the phase space structure of the above resonances. Our survey will be continued to the asteroid belt.

Uncertainty evaluation of potential sources of error in magnetic hyperthermia

Researcher: Makridis Antonios
Advisory Committee:
- Mavroeidis Angelakeris (supervisor)
Abstract/Objectives:
Measurement of specific loss power (SLP) of magnetic nanoparticles is crucial to assert the heating potential in magnetic hyperthermia. In this work, we propose a step by step standardization protocol, starting from definition and recording of potential uncertainty and error sources, present during a typical magnetic hyperthermia experimental protocol. The error of each specific parameter is estimated and translated to ultimate heating efficiency evaluation. All parameters involved in the heating efficiency evaluation and their associated uncertainties analysis presented in this work, are included in a standardization protocol, a handy guideline for determining accurate, reliable and reproducible SLP values, thus adequately evaluating its impact in potential bioapplications.

Understanding Scientific Models and modeling processes through Modern Physics teaching

Researcher: Stavros Koukioglou
Advisory Committee:
- Anastasios Molohidis (supervisor)
Abstract/Objectives:
The research will focus on developing the epistemological awareness of secondary school students and pre-service student-teachers, regarding Scientific Models. In this context, the use of an inquiry based Teaching Learning Sequence (T.L.S.) based on Scientific Models is recommended. Through the use of the T.L.S. the aspects of Scientific Models are expected to be developed. The activities integrated in the T.L.S. include real and virtual experiments using Information and Communication Technologies (I.C.T.). The assessment of subjects’ epistemological awareness about the aspects of Scientific Models will be conducted with the use of research based questionnaires and semi-structured interview.

Αναζήτηση Νέας Φυσικής στον LHC με τον ανιχνευτή ATLAS

Ανάλυση δεδομένων για κυματομορφές από συγχωνεύσεις διπλών συστημάτων αστέρων νετρονίων

Ανάπτυξη, δομικός, και μαγνητικός χαρακτηρισμός νανοδομημένων υλικών

Ανίχνευση ψευδών ειδήσεων σε πλατφόρμες κοινωνικής δικτύωσης με τεχνικές Στατιστικής Φυσικής και Μηχανικής Μάθησης

Απεικονιστικές τεχνικές φασματοσκοπίας υπερύθρου: Εφαρμογή στον χαρακτηρισμό υλικών με έμφαση σε δείγματα από αντικείμενα πολιτιστικής κληρονομιάς

Researcher: Lambrini Malletzidou
Advisory Committee:
- Konstantinos Chrissafis (supervisor)
Abstract/Objectives:
Απεικονιστικές τεχνικές φασματοσκοπίας υπερύθρου: Εφαρμογή στον χαρακτηρισμό υλικών με έμφαση σε δείγματα από αντικείμενα πολιτιστικής κληρονομιάς

Δυναμικά Συστήματα-Χαοτικοί Δείκτες

Ενίσχυση μέσω της εκπαιδευτικής ρομποτικής της διδασκαλίας με διερεύνηση βασικών εννοιών της μηχανικής στη Δευτεροβάθμια Εκπαίδευση

Επιδράσεις στο σύνορο φλοιού-πυρήνα τάχιστα περιστρεφόμενων αστέρων νετρονίων

Εφαρμογή σύγχρονων υλικών αποκαταστατικής οδοντιατρικής ως προσωπικών δοσιμέτρων ιοντιζουσών ακτινοβολιών

Κατασκευή Παρατηρητή για Ιδιόμορφα Συστήματα με Εφαρμογές στον Συγχρονισμό και στην Ασφάλεια Επικοινωνιών με Χρήση Χαοτικών Συστημάτων

Κβαντικές Ανωμαλίες σε Σύμμορφες Θεωρίες Πεδίου

Μελέτη Κλιματικών Μεταβολών στη Τροπόσφαιρα και Στρατόσφαιρα με δεδομένα από Μοντέλα Ατμοσφαιρικής Κυκλοφορίας του προγράμματος CMIP6

Μελέτη νανοδομών και διεπιφανειών σε υλικά τεχνολογίας με μεθόδους ηλεκτρονικής μικροσκοπίας, με έμφαση στα υλικά οπτοηλεκτρονικών (νιτρίδια) και θερμοηλεκτρικών εφαρμογών

Researcher: Ganatsiou Alexandra
Advisory Committee:
- Christos Lioutas (supervisor)
Abstract/Objectives:
Μελέτη νανοδομών και διεπιφανειών σε υλικά τεχνολογίας με μεθόδους ηλεκτρονικής μικροσκοπίας, με έμφαση στα υλικά οπτοηλεκτρονικών (νιτρίδια) και θερμοηλεκτρικών εφαρμογών

Μελέτη πολυμερών με βιο-προερχόμενα υλικά κατάλληλα για την βιομηχανία σανίδων από ξύλο και άλλες βιομάζες

Μελέτη σύνθετων υλικών

Μελέτη της ανάκαμψης του στρατοσφαιρικού όζοντος με ανάλυση παρατηρήσεων και αποτελεσμάτων μοντέλων

Μελέτη της ποιότητας του αέρα στην ανατολική Μεσόγειο υπό το πρίσμα της κλιματικής αλλαγής

Μελέτη των συγκεντρώσεων αερίων ιχνών και αιωρούμενων σωματιδίων στην ατμόσφαιρα με φασματοσκοπία διαφορικής οπτικής απορρόφησης

Μελέτη υλικών και ιδιοτήτων για Οργανικές Διόδους Εκπομπής Φωτός

Μελέτη υλικών με τεχνικές ακτινών-Χ και θερμικής ανάλυσης

Μετρικά-Αφινική Βαρύτητα και Κοσμολογία

Πλασμονικά Νανοσωματίδια για εφαρμογές στο βιολογικό παράθυρο του κοντινού υπέρυθρου

Σύνθεση και χαρακτηρισμός καινοτόμων νανοδομημένων θερμοηλεκτρικών υλικών με βιομηχανικού τύπου διεργασίες

Σχεδίαση χαοτικών συστημάτων και κβαντικών εκδοχών τους για ανάπτυξη μεθόδων κρυπτογραφίας και ασφαλούς μετάδοσης σημάτων

Το πρόβλημα των τεσσάρων σωμάτων («Ευθύδρομες και ανάδρομες» περιοδικές τροχιές): Εφαρμογή στη ζώνη αστεροειδών και σε πλανητικά συστήματα

Researcher: Thomas Kotoulas
Advisory Committee:
- Georgios Vougiatzis (supervisor)
Abstract/Objectives:
Το πρόβλημα των τεσσάρων σωμάτων («Ευθύδρομες και ανάδρομες» περιοδικές τροχιές): Εφαρμογή στη ζώνη αστεροειδών και σε πλανητικά συστήματα

Υπολογισμός ανθρωπογενών εκπομπών αέριων και σωματιδιακών ρύπων για τρέχοντα και μελλοντικά έτη αναφοράς

Υπολογιστική αναζήτηση ημιαγωγικών υλικών βασισμένων σε στοιχεία σε αφθονία

Υπολογιστική ανάλυση ιδιοτήτων μαγνητικών υλικών σε ατομιστική κλίμακα

Φαινόμενα πυρηνικής δομής και πυρηνικής αστροφυσικής με τη θεωρία σχετικιστικών συναρτησοειδών ενεργειακής πυκνότητας

Χαρακτηριστικά συσκευών από πρώτες αρχές με πολλαπλούς βαθμούς ελευθερίας του ηλεκτρονίου