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.
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.
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.
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.
Φαινόμενα πυρηνικής δομής και πυρηνικής αστροφυσικής με τη θεωρία σχετικιστικών συναρτησοειδών ενεργειακής πυκνότητας
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.
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.
Μετρικά-Αφινική Βαρύτητα και Κοσμολογία
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).
Κεραμικά βιοϋλικά: Σύνθεση και χαρακτηρισμός
Σύνθεση και μελέτη καινοτόμων υβριδικών ικριωμάτων με προσθήκη νανοσωματιδίων και μεσοπορωδών νανοφορέων για ενίσχυση της οστεογέννεσης
Σχεδίαση και υλοποίηση πειραματικών διατάξεων από απόσταση εργαστηριακών ασκήσεων του Γενικού Εργαστηρίου του τμήματος Φυσικής και διερεύνηση της αποδοχής τους από την φοιτητική κοινότητα
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.
Μελέτη νανοδομών και διεπιφανειών σε υλικά τεχνολογίας με μεθόδους ηλεκτρονικής μικροσκοπίας, με έμφαση στα υλικά οπτοηλεκτρονικών (νιτρίδια) και θερμοηλεκτρικών εφαρμογών
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.
Σχεδιασμός και αξιολόγηση Παιχνιδιών Εναλλακτικής Πραγματικότητας με ενσωμάτωση εμβυθιστικών τεχνολογιών για μαθητές δευτεροβάθμιας εκπαίδευσης αξιοποιώντας το επιστημονικό πεδίο της Μελέτης Έργων Τέχνης
Μελέτη σύνθετων υλικών
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
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.
Maria Elissavet Koukouli
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.
Κατασκευή Παρατηρητή για Ιδιόμορφα Συστήματα με Εφαρμογές στον Συγχρονισμό και στην Ασφάλεια Επικοινωνιών με Χρήση Χαοτικών Συστημάτων
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.
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.
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.
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.
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.
Σύνθεση και χαρακτηρισμός καινοτόμων νανοδομημένων θερμοηλεκτρικών υλικών με βιομηχανικού τύπου διεργασίες
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.
Χαρακτηριστικά συσκευών από πρώτες αρχές με πολλαπλούς βαθμούς ελευθερίας του ηλεκτρονίου
In the framework of postdoctoral research, the environmental impact of road transport is studied with an integrated computational tool that connects individual models and methodologies to assess all the significant variables that characterize the quality of the atmospheric environment, such as pollutant emissions, carbon footprint, traffic noise, energy efficiency, simulated while taking into account the atmospheric flow in the boundary layer and the real-world traffic conditions.