cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Η κτηματολογική δίκη με διάδικο Οργανισμό Τοπικής Αυτοδιοίκησης
Creators: name: Κατσαρού, Αγγελική Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Οργανισμός Τοπικής Αυτοδιοίκησης
Κτηματολογική δίκη
Εθνικό Κτηματολόγιο
Local Government Organization
Cadastral litigation
National Cadastre

description: Σκοπός της παρούσας εργασίας ήταν η παρουσίαση των νομοθετικών διατάξεων που διέπουν την κτηματολογική δίκη με διάδικο Οργανισμό Τοπικής Αυτοδιοίκησης, καθώς και τη νομολογιακή εφαρμογή των διατάξεων αυτών. Αρχικά επιχειρήθηκε μια συνοπτική παρουσίαση των διακρίσεων της ακίνητης περιουσίας των Ο.Τ.Α. και των προβλημάτων που αντιμετώπισαν κατά την σύνταξη του Εθνικού Κτηματολογίου. Στη συνέχεια εστιάσαμε στην ανάλυση των διαδικαστικών προϋποθέσεων και του ορισμένου της κτηματολογικής αγωγής με διάδικο Ο.Τ.Α., όπως αυτά έχουν αποτυπωθεί στη νομολογία. Ειδικότερη αναφορά έγινε στη κτηματολογική δίκη με αντικείμενο: α) ακίνητο διεκδικούμενο ως κοινόχρηστο, β) βοσκήσιμη γαία στις Νέες Χώρες, γ) ακίνητο που αποτελεί σχολική περιουσία και δ) έκταση διεκδικούμενη από Εκκλησιαστικό ΝΠΔΔ. Τέλος, αναφερθήκαμε στους προβληθέντες αμυντικούς ισχυρισμούς στις παραπάνω δίκες, ιδίως δε στον ισχυρισμό περί ιδίας κυριότητας θεμελιούμενης σε χρησικτησία και στο ειδικότερο ζήτημα της εφαρμογής της διάταξης του άρθρου 4 § 1 Ν. 3127/2003 κατά της ακίνητης περιουσίας των Ο.Τ.Α.
description: The aim of the present thesis was to present the legislative provisions governing the cadastral litigation with a Local Government Organization as a party, as well as the case law application of these provisions. At first, a brief presentation of the distinctions of the real property of the Local Authorities and the problems they faced during the preparation of the National Cadastre was attempted. We then focused on the analysis of the procedural requirements and the merits of a land registry action with a party being a Local Government Organization, as they have been reflected in the case law. Particular reference was made to the cadastral lawsuit involving: a) property claimed as common property, b) pasture land in the New Lands, c) property constituting school property and d) land claimed by a Church NPO. Finally, we referred to the defensive claims raised in the above-mentioned proceedings, in particular the claim of ownership based on usufruct and the more specific issue of the application of the provision of Article 4 § 1 of Law 3127/2003 against the real property of Local Government Organizations.
Biomarkers of dietary polyphenols and cognitive decline: a systematic review.
Creators: name: Tor-Roca, Alba
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Psychiatry and Psychology
subject: Dietetics and Clinical Nutrition
subject: Nutrition
subject: Medicine and Health Sciences
subject: Life Sciences
subject: Food Chemistry
subject: Food Science

description: Systematic review on the relationship between biomarkers of dietary polyphenols and cognitive decline.
How African countries respond to fake news and hate speech
Creators: name: Garbe, Lisa
name: Selvik, Lisa-Marie
name: Lemaire, Pauline
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: Medicine
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Science Policy
subject: Computational Biology

description: While scholars have already identified and discussed some of the most urgent problems in content moderation in the Global North, fewer scholars have paid attention to content regulation in the Global South, and notably Africa. In the absence of content moderation by Western tech giants themselves, African countries appear to have shifted their focus towards state-centric approaches to regulating content. We argue that those approaches are largely informed by a regime’s motivation to repress media freedom as well as institutional constraints on the executive. We use structural topic modelling on a corpus of news articles worldwide (N = 7′787) mentioning hate speech and fake news in 47 African countries to estimate the salience of discussions of legal and technological approaches to content regulation. We find that, in particular, discussions of technological strategies are more salient in regimes with little respect for media freedom and fewer legislative constraints. Overall, our findings suggest that the state is the dominant actor in shaping content regulation across African countries and point to the need for a better understanding of how regime-specific characteristics shape regulatory decisions.
Scaling limit of subcritical contact process
Creators: name: Deshayes, Aurelia
name: Rolla, Leonardo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: In this paper we describe the subcritical contact process on $\Z^d$ for large times, starting with all sites infected. The configuration is described in terms of the macroscopic locations of infected regions in space and the relative positions of infected sites in each such region.
Characterizing the Effects of Prostaglandin E2 on Tendon Mechanical Properties
Creators: name: Baum, Elyse Jeannette
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2007

description: Tendinopathy is a common clinical problem, both athletically and occupationally. It develops from repetitive mechanical loading of tendon; however the molecular mechanisms are not well understood. It is thought that prostaglandin E2 (PGE2) and matrix metalloproteinases (MMPs) play a role in the early stages of tendinopathy development. This research utilizes a rat tail tendon fascicle explant model to characterize the effects of PGE2 in statically loaded and unloaded tendon. These effects were quantified through creep measurement during culture and tensile failure tests of the tissue after culture. Both specific and nonspecific MMP inhibitors were used in the system to better characterize the molecular mechanism of PGE2's action in the tissue. We found that MMP inhibitors and static loading prevents PGE2 from decreasing the mechanical properties of the tissue.
Freeness of spherical Hecke modules of unramified $U(2,1)$ in characteristic $p$
Creators: name: Xu, Peng
Publisher: name: arXiv
Year: 2016
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: Let $F$ be a non-archimedean local field of odd residue characteristic $p$. Let $G$ be the unramified unitary group $U(2, 1)(E/F)$ in three variables, and $K$ be a maximal compact open subgroup of $G$. For an irreducible smooth representation $σ$ of $K$ over $\overline{\mathbf{F}}_p$, we prove that the compactly induced representation $\text{ind}^G _K σ$ is free of infinite rank over the spherical Hecke algebra $\mathcal{H}(K, σ)$.
description: Final version, to appear in Journal of Number Theory
The effect of relative velocity and density perturbations between baryons and dark matter on the clustering of galaxies
Creators: name: Schmidt, Fabian
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Pre-recombination acoustic oscillations induce non-adiabatic perturbations between baryons and dark matter, corresponding to a constant relative-density $δ_{bc}$ and decaying relative-velocity perturbation $\vec{v}_{bc}$. Due to their significant large-scale correlations and prominent baryon acoustic oscillation (BAO) features, these modes are potentially important for the use of the BAO as standard ruler. We present a complete treatment of the effects of the baryon-CDM perturbations on galaxy clustering in the context of a rigorous perturbative bias expansion. The leading effects are proportional to $δ_{bc}$ and $θ_{bc} = \partial_i v_{bc}^i$. We estimate the magnitude of these terms through the excursion set approach. The contribution from $v_{bc}^2$, which has attracted significant attention recently, contributes at subleading (1-loop) order. The relative-density contribution $δ_{bc}$ is expected to be by far the largest contribution. We also point out contributions to the galaxy velocity bias, the largest of which is simply $v_{bc}$, leading to a term $\propto μ^2θ_{bc}$ in the redshift-space galaxy power spectrum $P_g^s(k,μ)$. Complete expressions of the galaxy power spectrum at 1-loop order are given, which contain several new terms.
description: 16 pages, 6 figures; v2: substantially extended version including relative density mode and more estimates of bias parameters; v3: expanded introduction and conclusions, corrected Eq (46); matches PRD accepted version
Methods Development for SARS-CoV-2 Wastewater Surveillance
Creators: name: Kelly, Leah
Publisher: name: University of Illinois at Chicago
Year: 2023

description: Wastewater surveillance has proven to be a useful tool to monitor pathogens such as SARS-CoV-2. Wastewater testing is a nonintrusive way to survey the whole population contributing to a sewershed and monitor COVID-19 levels over time. As the pandemic progressed, laboratory methods to process wastewater and quantify SARS-CoV-2 RNA levels transitioned and improved as technologies changed, projects expanded sample numbers, and supply chain issues resolved. Maintaining data continuity is crucial for labs undergoing a method transition so they are able to accurately assess COVID-19 levels over time and compare RNA detection values to public health data. Chapter I of this thesis describes an RNA extraction kit comparison project that was done to compare ThermoFisher, Promega and Macherey-Nagel RNA extraction kits. To evaluate the kits, we looked at their sensitivity, variability and efficiency and saw that the ThermoFisher RNA extraction kit was the best overall. In Chapter II of this thesis, a lab transition is described from a low-throughput manual filtration-based wastewater concentration and RNA extraction followed by qPCR to a high-throughput automated magnetic bead-based concentration and extraction followed by dPCR. During the two-month transition period, wastewater samples from across the Chicagoland area were processed with both methods in parallel. We evaluated a variety of models to relate the RNA measurements from both methods and found that a Log-Log model was most appropriate to relate the datasets after removing outliers and inconsistent points to improve model performance. This study demonstrates that data continuity can be maintained during a transition of laboratory methods if the labs maintain a period of overlap of both methods and construct a model to relate the datasets.
Προσομοιώσεις Μοριακής Δυναμικής Ενυδατωμένων Νανοσύνθετων Οξειδίου Του Γραφενίου Με Υπερδιακλαδισμένα Πολυμερή Πολυ (Αιθυλενιμίνης)
Creators: name: Κωνσταντίνου, Αποστόλης Αντωνίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Νανοσύνθετα
Προσομοιώσεις
Μοριακή Δυναμική
Nanocomposites
Simulations
Molecular Dynamic

description: Στα πλαίσια της παρούσας διπλωματικής εργασίας πραγματοποιήθηκε μέσω πλήρως ατομιστικών προσομοιώσεων Μοριακής Δυναμικής (ΜΔ) μελέτη ενυδατωμένων νανοσύνθετων συστημάτων υπερδιακλαδισμένων πολυμερών πολύ(αιθυλενιμίνης) (HBPEI) και φυλλιδίων οξειδίου του γραφενίου (GO) σε συνθήκες ουδέτερου pH. Μελετήθηκαν έξι συστήματα G0-HBPEI, τα οποία διέφεραν στην κατά βάρος σύστασή τους στα 2 συστατικά και στη γενεά του δενδριμερούς. Στόχο αποτέλεσε η μελέτη της επίδρασης της γενεάς και της συγκέντρωσης σε μορφολογικά αλλά και σε κάποια δυναμικά χαρακτηριστικά του νανοσύνθετου GO-HBPEI. Οι αναλύσεις των αποτελεσμάτων παρείχαν πληροφορίες για τυχόν μορφολογικές μεταβολές των μορίων και για τη σχετική χωροθέτηση των φυλλιδίων και του πολυμερούς στα νανοσύνθετα, ενώ μελετήθηκαν και οι μηχανισμοί αλληλεπίδρασης μεταξύ των μορίων. Συνοψίζοντας, εξήχθησαν για πρώτη φορά αποτελέσματα για τα μορφολογικά χαρακτηριστικά τέτοιων νανοσύνθετων και τέθηκαν οι βάσεις για μελλοντική μελέτη στατικών και δυναμικών τους χαρακτηριστικών, τα οποία μπορεί να επηρεάσουν σημαντικά τις φυσικές τους ιδιότητες.
description: Within the framework of this thesis, a study of hydrated nanocomposite systems of hyperbranched poly(polyethyleneimine) polymers (HBPEI) and graphene oxide (GO) flakes was carried out through fully atomistic Molecular Dynamics (MD) simulations at neutral pH conditions. Six G0-HBPEI systems were studied, differing in their 2-component weight composition and dendrimer generation. The aim was to study the effect of generation and concentration on morphological and on some dynamic characteristics of the GO-HBPEI nanocomposites. The analysis of the results provided information on some morphological changes of the molecules and on the relative arrangement of the leaflets and the polymer in the nanocomposites, while the interaction mechanisms between the molecules were also studied. In summary, results for the morphological characteristics of such nanocomposites were derived for the first time and the foundations were laid for future study of static and dynamic features which may significantly affect their physical properties.
The Defect of Random Hyperspherical Harmonics
Creators: name: Rossi, Maurizia
Publisher: name: arXiv
Year: 2016
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Random hyperspherical harmonics are Gaussian Laplace eigenfunctions on the unit $d$-sphere ($d\ge 2$). We investigate the distribution of their defect i.e., the difference between the measure of positive and negative regions. Marinucci and Wigman studied the two-dimensional case giving the asymptotic variance (Marinucci and Wigman 2011) and a Central Limit Theorem (Marinucci and Wigman 2014), both in the high-energy limit. Our main results concern asymptotics for the defect variance and quantitative CLTs in Wasserstein distance, in any dimension. The proofs are based on Wiener-Itô chaos expansions for the defect, a careful use of asymptotic results for all order moments of Gegenbauer polynomials and Stein-Malliavin approximation techniques by Nourdin and Peccati. Our argument requires some novel technical results of independent interest that involve integrals of the product of three hyperspherical harmonics.
description: Accepted for publication in Journal of Theoretical Probability
A Vindication of Feminism as Identity Politics: Towards a Combaheean Response to Zerilli's "Freedom-Centered Feminism"
Creators: name: Caver, Christopher Martin
Publisher: name: University of North Carolina at Chapel Hill
Year: 2013

description: This paper is primarily an extended critique and meditation on Linda Zerilli's Feminism and The Abyss of Freedom. In that remarkable text Zerilli attempts to move beyond the perennial debates of identity reification, deconstruction, and calls to a strategic essentialism. Drawing on the work of Hannah Arendt, she helps us to refocus on the primacy of politics as an active doing instead of a rule-governed practice. However, in so doing she downplays the work of feminists committed to just the sort of political engagement she champions, yet who insist on making claims based on identity. I attempt to show that these identity claims should not be perceived as a rule which politics should follow, but as essentially political themselves. Using the Combahee River Collective Statement as an illustration of this, I show how identity claims are not necessarily claims to privileged knowledge or preferential treatment, nor are they confining caricatures that lock their claimants in oppressive stereotypes, binding them to the recognition they seek. Instead, the Combahee River Collective shows how identity politics names the exclusion felt by specific identity groups and enacts a new political discourse where their perspective and their interests are taken seriously.
Λοιμώδεις επιπλοκές λιθοθρυψίας
Creators: name: Koντολάτης, Νικόλαος Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Λοιμώδεις
Επιπλοκές
Λιθοθρυψία
Ιnfectious
Complications
Lithotripsy

description: Η εξωσωματική και ενδοσωματική λιθοθρυψία είναι συχνές επεμβάσεις οι οποίες διενεργούνται σε ασθενείς που πάσχουν από λιθίαση του ουροποιητικού συστήματος. Όπως όλες οι επεμβάσεις, μπορεί να εμφανίσουν μετεγχειρητικά επιπλοκές, και ιδιαίτερα οι URS και PCNL. Εξ αυτών οι λοιμώδεις επιπλοκές είναι οι πιο συχνές και σημαντικές. Για τον λόγο αυτό σκοπός της εργασίας αυτής είναι η ανασκόπηση της βιβλιογραφίας και η ανάλυση αρχικά των μηχανισμών λειτουργίας των μεθόδων λιθοθρυψίας, ώστε να είναι εύληπτη η παθογένεση των λοιμωδών επιπλοκών. Εν συνεχεία θα αναδειχθεί η συχνότητα και η μικροβιολογία των παραπάνω λοιμώξεων, καθώς και οι παράγοντες κινδύνου που προδιαθέτουν στην εκδήλωση τους. Τέλος, θα αναλυθεί διεξοδικά και η πρόληψη, η διάγνωση και η θεραπεία των λοιμωδων επιπλοκών.
description: Extracorporeal and intracorporeal lithotripsy consitute common interventions in patients who suffer from lithiasis of the urinary tract. Αs every intervention, they are associated with possible postoperative complications, especially the URS and PCNL. Out of them, infectious complications are the most common and important ones. The aim of this review is, firstly, to describe the pathogenesis of such complications by analyzing the different lithotripsy methods and their mechanism of action and secondly to highlight their incidence, microbiology and the risk factors involved in their development. Finally, preventive measures, diagnosis and treatment of infectious complications will be discussed thoroughly.
Derived categories of noncommutative quadrics and Hilbert squares
Creators: name: Belmans, Pieter
name: Raedschelders, Theo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Algebraic Geometry (math.AG)
subject: Quantum Algebra (math.QA)
subject: Rings and Algebras (math.RA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: A noncommutative deformation of a quadric surface is usually described by a three-dimensional cubic Artin-Schelter regular algebra. In this paper we show that for such an algebra its bounded derived category embeds into the bounded derived category of a commutative deformation of the Hilbert scheme of two points on the quadric. This is the second example in support of a conjecture by Orlov. Based on this example, we formulate an infinitesimal version of the conjecture, and provide some evidence in the case of smooth projective surfaces.
description: 21 pages. Small corrections + expanded proof of Lemma 2.1
Demonstrating the Importance of Multi-wave Assessment of Peer Victimization
Creators: name: Sheppard, Christopher S.
Publisher: name: University of North Carolina at Chapel Hill
Year: 2014

description: The current study assessed the extent to which chronic victimization is a unique type of peer victimization. This was examined using stability analyses, trajectory analyses, and comparisons of victimization and adjustment outcomes both concurrently and longitudinally over a 3-year period. A community sample of 652 adolescent (50% females) in Grades 6-8 participated in the study. Participants completed measures of peer-reported victimization and associated adjustment correlates (both self and peer-report) at three time points. Peer victimization was not stable for all victims, and four trajectories of victimization were identified: chronic, high decreasing, low increasing, and low stable. The chronic victimization trajectory was associated with worse overall outcomes than the other trajectories. Results provided additional support for the idea that the chronicity of peer victimization influences the impact of victimization on youth, and that a single time point assessment of victimization is insufficient to capture the nuances of this construct.
Η γλυκαιμική ρύθμιση παιδιών και εφήβων με Σακχαρώδη Διαβήτη τύπου 1, που ακολούθησαν δίαιτα χαμηλών και πολύ χαμηλών υδατανθράκων: Συστηματική Ανασκόπηση
Creators: name: Κωτόγλου, Κωνσταντίνα Πολυχρόνη
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Δίαιτα χαμηλών και πολύ χαμηλών υδατανθράκων
Παιδιά και έφηβοι με Σακχαρώδη Διαβήτη τύπου 1
Γλυκαιμικός έλεγχος
Low and very low carbohydrate diet
Children and adolescents with type 1 diabetes mellitus
Glycemic control

description: Η παρούσα εργασία στοχεύει στην εξέταση του αν και κατά πόσο οι δίαιτες χαμηλών και πολύ χαμηλών υδατανθράκων μπορούν να επηρεάσουν τον γλυκαιμικό έλεγχο παιδιών και εφήβων με σακχαρώδη διαβήτη τύπου 1 χωρίς να επιφέρουν επιπρόσθετες επιπλοκές στην υγεία τους. Η έρευνα βασίστηκε σε συστηματική ανασκόπηση της υπάρχουσας βιβλιογραφίας με σκοπό να βρεθούν και να αναλυθούν τα αποτελέσματα σχετικών ερευνών. Συνολικά επιλέχθηκαν 18 σχετικές μελέτες οι οποίες αφορούσαν σε 28 μελέτες περιπτώσεων. Φάνηκε πως μια δίαιτα χαμηλών ή/ και πολύ χαμηλών υδατανθράκων μπορεί να επηρεάσει θετικά τους δείκτες γλυκαιμικής ρύθμισης, βελτιώνοντας την υγεία των παιδιών και εφήβων με διαβήτη τύπου 1. Αυτό το αποτέλεσμα ισχύει ανεξάρτητα του φύλου και της ηλικίας των ασθενών, αλλά και ανεξάρτητα του αν η δίαιτα που ακολουθήθηκε ήταν χαμηλών ή πολύ χαμηλών υδατανθράκων. Ωστόσο, κρίνεται απαραίτητη η υιοθέτηση αυτού του είδους δίαιτας μόνο έπειτα από τη συστηματική συμβολή ενός διαιτολόγου εξειδικευμένου στον σακχαρώδη διαβήτη, για την αποφυγή ανεπιθύμητων παρενεργειών.
description: The present work aimed to examine whether and to what extent low- and very-low-carbohydrate diets can affect glycemic control in children and adolescents with type 1 diabetes without causing additional health complications. The research was based on a systematic review of the existing literature in order to analyze the results of relevant research. A total of 18 relevant studies were selected, which related to 28 case studies. The systematic review showed that a low- and/or very low- carbohydrate diet can positively influence glycemic control indices, improving the health of children and/or adolescents with type 1 diabetes. This result is valid regardless of the gender and age of the patients, but also regardless of whether the diet followed was low- or very low- carb. However, it is considered necessary to use this type of diet only after the prompting of an expert dietician in the context of diabetes mellitus, in order to avoid any unpleasant outcomes.
Scalar-multi-tensorial equivalence for higher order $f\left( R,\nabla_μ R,\nabla_{μ_{1}}\nabla_{μ_{2}}R,...,\nabla_{μ_{1}}...\nabla_{μ_{n} }R\right)$ theories of gravity
Creators: name: Cuzinatto, R. R.
name: de Melo, C. A. M.
name: Medeiros, L. G.
name: Pompeia, P. J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The equivalence between theories depending on the derivatives of $R$, i.e. $f\left( R,\nabla R,...,\nabla^{n}R\right) $, and scalar-multi-tensorial theories is verified. The analysis is done in both metric and Palatini formalisms. It is shown that $f\left( R,\nabla R,...,\nabla^{n}R\right) $ theories are equivalent to scalar-multi-tensorial ones resembling Brans-Dicke theories with kinetic terms $ω_{0}=0$ and $ω_{0}= - \frac{3}{2}$ for metric and Palatini formalisms respectively. This result is analogous to what happens for $f(R)$ theories. It is worthy emphasizing that the scalar-multi-tensorial theories obtained here differ from Brans-Dicke ones due to the presence of multiple tensorial fields absent in the last. Furthermore, sufficient conditions are established for $f\left( R,\nabla R,...,\nabla^{n}R\right) $ theories to be written as scalar-multi-tensorial theories. Finally, some examples are studied and the comparison of $f\left( R,\nabla R,...,\nabla^{n}R\right) $ theories to $f\left( R,\Box R,...\Box^{n}R\right) $ theories is performed.
description: 12 pages, minor corrections
Αθλητική καρδιά σε εφήβους αθλητές
Creators: name: Κουλίνα, Κωνσταντίνα Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Αθλητική καρδιά
Έφηβοι
Καρδιακή αναδιαμόρφωση
Athlete’s heart
Adolescents
Cardiac remodelling

description: Η παρούσα μελέτη αφορά ανασκόπηση βιβλιογραφίας σχετικά με το φαινόμενο της αθλητικής καρδιάς στον εφηβικό πληθυσμό. Η αθλητική καρδιά συμπεριλαμβάνει φυσιολογικές προσαρμογές των καρδιακών κοιλοτήτων, με αποτέλεσμα τη βέλτιστη λειτουργία της καρδιάς κατά την άθληση. Κάποια χαρακτηριστικά της αθλητικής καρδιάς επικαλύπτονται με χαρακτηριστικά υποκείμενων παθολογιών της καρδιάς, καθιστώντας τη διαφορική διάγνωση πιο δύσκολη. Συνδυαστικά, η αθλητική καρδιά έχει μελετηθεί κυρίως σε ενήλικο πληθυσμό, δημιουργώντας ένα ερευνητικό κενό ως προς τον εφηβικό. Οι έρευνες που απευθύνονται σε εφήβους έχουν διαπιστώσει διαφορές ως προς την ηλικία και το φύλο και φαίνεται ότι τα πιο έντονα χαρακτηριστικά της αθλητικής καρδιάς παρατηρούνται σε άντρες μεγαλύτερης ηλικίας. Αναφορικά με τις υποκείμενες παθολογίες, ένα μεγάλο ποσοστό αφορούν κληρονομικές παθήσεις και σε ορισμένες από αυτές η άθληση λειτουργεί ως καταλύτης για την εμφάνισή τους. Ως εκ τούτου, οι οδηγίες της Ευρωπαϊκής Καρδιολογικής Εταιρίας συστήνουν για τον προαθλητικό έλεγχο τη λήψη ατομικού και οικογενειακού ιστορικού, την κλινική εξέταση και το ηλεκτροκαρδιογράφημα. Η μελέτη ολοκληρώνεται με μια σύντομη ανασκόπηση της αιτιολογίας των πιο κοινών υποκείμενων παθήσεων, και των κοινών χαρακτηριστικών που παρουσιάζουν με την αθλητική καρδιά, καθώς και της καταγραφής των περιορισμών στην έρευνα, αλλά και προτάσεων για μελλοντική διερεύνηση.
description: The present study focuses on a literature review of the “athlete’s heart” syndrome in the adolescent population. The syndrome comprises of physiological cardiac remodelling that results in the optimal function of the heart during exercise. However, some of the characteristic features of “athlete’s heart” overlap with underlying diseases of the heart, making difficult the differential diagnosis. In addition, the “athlete’s heart” syndrome has been examined mainly in adult populations, so there is a gap in research for adolescents. Research interest that focuses on the adolescent population, emphasizes that the various characteristics of “athlete’s heart” are more pronounced in older men. As for the underlying diseases, they are mainly hereditary diseases and, in some cases, sports activity acts as manifestation trigger. Therefore, the guidelines of the European Society of Cardiology recommend that the preparticipation screening should include personal and family history, physical examination and an electrocardiogram. Furthermore, the study is completed with a brief review of the most common underlying cardiovascular diseases, which could mimic the “athlete’s heart”, as well as the research limitations and suggestions for future research.
Search for single production of a vector-like quark via a heavy gluon in the $4b$ final state with the ATLAS detector in $pp$ collisions at $\sqrt{s} = 8$ TeV
Creators: name: ATLAS Collaboration
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A search is performed for the process $pp \to G^* \to B_H\bar b/\bar B_H b \to H b \bar b \to b\bar bb\bar b$, predicted in composite Higgs scenarios, where $G^*$ is a heavy colour octet vector resonance and $B_H$ a vector-like quark of charge $-1/3$. The data were obtained from $pp$ collisions at a centre-of-mass energy of 8 TeV corresponding to an integrated luminosity of 19.5 fb$^{-1}$, recorded by the ATLAS detector at the LHC. The largest background, multijet production, is estimated using a data-driven method. No significant excess of events with respect to Standard Model predictions is observed, and upper limits on the production cross section times branching ratio are set. Comparisons to the predictions from a specific benchmark model are made, resulting in lower mass limits in the two-dimensional mass plane of $m_{G^*}$ vs. $m_{B_H}$.
description: 36 pages, 5 figures, 5 tables. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2014-19
Οι Ειδικές Ανακριτικές Πράξεις της Ανακριτικής Διείσδυσης και της Συγκαλυμμένης Έρευνας
Creators: name: Κουτζαφάρας, Δημήτριος Στυλιανού
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: subject: Νομική
subject: Ειδικές Ανακριτικές Πράξεις
subject: Ανακριτική Διείσδυση και Συγκαλυμμένη Έρευνα
subject: Law
subject: FOS: Law
subject: Special investigative acts
subject: Interrogation penetration end Covert research

description: Σκοπός της διατριβής με τίτλο «Οι Ειδικές Ανακριτικές Πράξεις της Ανακριτικής Διείσδυσης και της Συγκαλυμμένης Έρευνας» ήταν η καταγραφή του γενικότερου πλαισίου του συνόλου των Ειδικών Ανακριτικών πράξεων, το πώς και για ποιους σκοπούς αυτές εισήχθησαν στην Ελληνική έννομη τάξη καθώς και μία ειδικότερη παρουσίαση των δύο πράξεων που ήταν το κύριο αντικείμενο της παρούσας μελέτης. Εξετάστηκε το νομοθετικό πλαίσιο αυτών τόσο με το προϊσχύον καθεστώς όσο και με τον Νέο Κώδικα Ποινικής Δικονομίας όπως ισχύει σήμερα. Ακολούθως, αποτυπωθήκαν οι βασικές προϋποθέσεις, οι οποίες πρέπει να συντρέχουν έτσι ώστε οι διενέργεια των ως άνω πράξεων να είναι σύννομες και τα ευρήματα αυτών να είναι αξιοποιήσιμα. Εν συνεχεία διατυπώθηκαν σκέψεις υπέρ και κατά του θεσμού που έχουν υποστηριχθεί σε θεωρία και νομολογία πάντοτε υπό το πρίσμα του Συντάγματος. Τέλος, ενσωματώθηκαν πλήθος νομολογιακών παραδειγμάτων του ΕΔΔΑ και του Αρείου Πάγου που αποτύπωσαν χρήσιμα συμπεράσματα σχετικά με τη διαφορετική αντιμετώπιση των Ειδικών Ανακριτικών Πράξεων από την Ευρωπαϊκή και την εγχώρια νομολογία.
description: The purpose of the thesis entitled “The Special Investigative Acts of Investigative Penetration and Covert Research” was to record the general context of all Special Investigative Acts, how and for what purposes they were introduced into the Greek legal order as well as a more specific presentation of the two acts that were the main subject of this study. The legislative framework of these was examined both with the previous regime and with the New Code of Criminal Procedure as currently in force. Subsequently, the basic conditions were depicted, which must be met in order for the execution of the above acts to be lawful and their findings to be usable. Subsequently, considerations for and against the institution were expressed, which have been supported in theory and jurisprudence, always in the light of the Constitution. Finally, a number of case-law examples of the ECtHR and the Supreme Court were incorporated that reflected useful conclusions regarding the different treatment of Special Investigative Acts by European and domestic jurisprudence.
description: Σε συνεργασία με: Νομικής (Δημοκρίτειο Πανεπιστήμιο Θράκης)
A tunable low-drift laser stabilized to an atomic reference
Creators: name: Leopold, Tobias
name: Schmöger, Lisa
name: Feuchtenbeiner, Stefanie
name: Grebing, Christian
name: Micke, Peter
name: Scharnhorst, Nils
name: Leroux, Ian D.
name: López-Urrutia, José R. Crespo
name: Schmidt, Piet O.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present a laser system with a linewidth and long-term frequency stability at the 50 kHz level. It is based on a Ti:Sapphire laser emitting radiation at 882 nm which is referenced to an atomic transition. For this, the length of an evacuated transfer cavity is stabilized to a reference laser at 780 nm locked to the $^{85}$Rb D$_2$-line via modulation transfer spectroscopy. Gapless frequency tuning of the spectroscopy laser is realized using the sideband locking technique to the transfer cavity. In this configuration, the linewidth of the spectroscopy laser is derived from the transfer cavity, while the long-term stability is derived from the atomic resonance. Using an optical frequency comb, the frequency stability and linewidth of both lasers are characterized by comparison against an active hydrogen maser frequency standard and an ultra-narrow linewidth laser, respectively. The laser system presented here will be used for spectroscopy of the $1s^{2}2s^{2}2p\ ^{2}P_{1/2} -\ ^{2}P_{3/2}$ transition in sympathetically cooled Ar$^{13+}$ ions at 441nm after frequency doubling.
description: 7 pages, 8 figures
On the similarities of representations in artificial and brain neural networks for speech recognition.
Creators: name: Wingfield, Cai
name: Zhang, Chao
name: Devereux, Barry
name: Fonteneau, Elisabeth
name: Thwaites, Andrew
name: Liu, Xunying
name: Woodland, Phil
name: Marslen-Wilson, William
name: Su, Li
Publisher: name: Apollo - University of Cambridge Repository
Year: 2022
Subjects: Neuroscience
automatic speech recognition
deep neural network
representational similarity analysis
auditory cortex
speech recognition

description: Peer reviewed: True
description: Acknowledgements: The authors thank Anastasia Klimovich-Smith, Hun Choi, Lorraine Tyler, Andreas Marouchos, and Geoffrey Hinton for thoughtful comments and discussions. RSA computation was done in the RSA toolbox for Matlab (Nili et al., 2014) using custom EMEG and ssRSA extensions, to which Isma Zulfiqar, Fawad Jamshed, and Jana Klímová also contributed.
description: INTRODUCTION: In recent years, machines powered by deep learning have achieved near-human levels of performance in speech recognition. The fields of artificial intelligence and cognitive neuroscience have finally reached a similar level of performance, despite their huge differences in implementation, and so deep learning models can-in principle-serve as candidates for mechanistic models of the human auditory system. METHODS: Utilizing high-performance automatic speech recognition systems, and advanced non-invasive human neuroimaging technology such as magnetoencephalography and multivariate pattern-information analysis, the current study aimed to relate machine-learned representations of speech to recorded human brain representations of the same speech. RESULTS: In one direction, we found a quasi-hierarchical functional organization in human auditory cortex qualitatively matched with the hidden layers of deep artificial neural networks trained as part of an automatic speech recognizer. In the reverse direction, we modified the hidden layer organization of the artificial neural network based on neural activation patterns in human brains. The result was a substantial improvement in word recognition accuracy and learned speech representations. DISCUSSION: We have demonstrated that artificial and brain neural networks can be mutually informative in the domain of speech recognition.
Παχώμιος Ρουσάνος. Η συνεισφορά του ως Διδασκάλου στην Λειμωνιάδα Σχολή της Ιεράς Μονής Λειμώνος. Το έργο και η διδασκαλία του
Creators: name: Κράλλης, Ιωάννης Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Παχώμιος Ρουσάνος
Παιδεία
Λειμωνιάδα Σχολή
Pachomios Rousanos
Education
Leimonian School

description: Η ανά χείρας εργασία, μέσω της μελέτης των ιστορικών πηγών και των νεότερων ιστορικών επιστημονικών συγγραμμάτων, αποτέλεσε καρπό μιας προσπάθειας για την παρουσίαση του έργου του Παχωμίου Ρουσάνου, ιδιαίτερα στη Λειμωνιάδα Σχολή, όπου καταγράφεται ουσιαστικά η όλη ιστορία της παιδείας κατά την περίοδο της τουρκοκρατίας. Στην εισαγωγή γίνεται αναφορά εν συντομία στην περίοδο της τουρκοκρατίας και στην παρουσία των Λογίων διδασκάλων του Γένους, εξαιρέτως δε στον βίο και το έργο του Παχωμίου Ρουσάνου. Στο Πρώτο Κεφάλαιο γίνεται εκτεταμένη αναφορά και καταγραφή του ζητήματος της παιδείας κατά την Τουρκοκρατία, καθώς και της μέριμνας της Εκκλησίας για την παιδεία των υποδούλων Ελλήνων. Στο Δεύτερο, Τρίτο και Τέταρτο Κεφάλαιο παρουσιάζεται η Ιερά Μονή Λειμώνος μέσα στο χρόνο, καθώς και η λειτουργία της Λειμωνιάδος Σχόλης. Στο Πέμπτο Κεφάλαιο καταγράφεται η σχέση του Παχωμίου Ρουσάνου με την Λειμωνιάδα Σχολή και στο Έκτο γίνεται αναφορά στην παιδαγωγική σκέψη και το παιδαγωγικό έργο του Παχωμίου Ρουσάνου, σκιαγραφόντας συγχρόνως και την φυσιογνωμία του ως διδασκάλου. Τέλος καταγράφονται τα συμπεράσματα που εξάγονται από την γενομένη έρευνα και παρατίθεται η σχετική βιβλιογραφία.
description: The present work, through the study of historical sources and recent historical scientific texts, is the result of an effort to present the work of Pachomios Rousanos, particularly in the Leimonian School, which essentially records the entire history of education during the period of Turkish rule. The introduction briefly references the period of Turkish rule and the presence of the Scholars teachers of the Great School of Genus, focusing specifically on the life and work of Pachomios Rousanos. The First Chapter extensively discusses the issue of education of enslaved Greeks. The Second, Third, and Fourth Chapters present the Holy Monastery of Lemonos over time, as well as the functioning of the Lemonian School. The Fifth Chapter records the relationship between Pachomios Rousanos and the Lemonian School, while the Sixth Chapter refers to his pedagogical thoughts and educational work, also portraying his profile as a teacher. Finally, the conclusions drawn from the conducted research are recorded, along with the relevant bibliography.
description: Σε συνεργασία με: Κοινωνικής Θεολογίας (Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών)
Molecular force spectroscopy of kinetochore-microtubule attachment {\it in silico}: Mechanical signatures of an unusual catch bond and collective effects
Creators: name: Ghanti, Dipanwita
name: Patra, Shubhadeep
name: Chowdhury, Debashish
Publisher: name: arXiv
Year: 2016
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Subcellular Processes (q-bio.SC)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Measurement of the life time of attachments formed by a single microtubule (MT) with a single kinetochore (kt) {\it in-vitro} under force-clamp conditions had earlier revealed a catch-bond-like behavior. In the past the physical origin of this apparently counter-intuitive phenomenon was traced to the nature of the force-dependence of the (de-)polymerization kinetics of the MTs. Here first the same model MT-kt attachment is subjected to external tension that increases linearly with time until rupture occurs. In our {\it force-ramp} experiments {\it in-silico}, the model displays the well known `mechanical signatures' of a catch-bond probed by molecular force spectroscopy. Exploiting this new evidence, we have further strengthened the analogy between MT-kt attachments and common ligand-receptor bonds in spite of the crucial differences in their underlying physical mechanisms. We then extend the formalism to model the stochastic kinetics of an attachment formed by a bundle of multiple parallel microtubules with a single kt considering the effect of rebinding under force-clamp and force-ramp conditions. From numerical studies of the model we predict the trends of variation of the mean life time and mean rupture force with the increasing number of MTs in the bundle. Both the mean life time and the mean rupture force display nontrivial nonlinear dependence on the maximum number of MTs that can attach simultaneously to the same kt.
description: Thoroughly revised final version; published in Physical Review E
Συμμετοχή στον ν. 4139/2013
Creators: name: Κυριακοπούλου, Βιργινία Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Συμμετοχή
ν. 4139/2013
Ναρκωτικά
Participation
Law 4139/2013
Drugs

description: Στόχος της παρούσας διπλωματικής εργασίας αποτέλεσε η παρουσίαση μιας σειράς σημαντικών παραδειγμάτων συμμετοχής στα εγκλήματα διακίνησης του ν. 4139/2013, η ανάλυση ορισμένων από των πιο ενδιαφερόντων ζητημάτων συμμετοχής που αντιμετώπισε η πρόσφατη ποινική νομολογία στα εν λόγω εγκλήματα, αλλά και η διατύπωση μιας τεκμηριωμένης επιστημονικής κριτικής πάνω στα ζητήματα αυτά. Μια κριτική που είναι επιβεβλημένη, διότι οδηγεί σε έναν γόνιμο διάλογο μεταξύ της επιστήμης και της νομολογίας, καθώς σε πολλά ζητήματα υπάρχει διάσταση απόψεων. Περαιτέρω, έγινε μια προσπάθεια να αναλυθούν και να σχολιασθούν κάποια πιο οριακά ζητήματα άμεσης και απλής συνέργειας, η περίπτωση του προβοκάτορα ηθικού αυτουργού, αλλά και ένα ειδικότερο ζήτημα συμμετοχής, που είναι η εφαρμογή του ά. 49 παρ. 2 του ΠΚ σε εγκλήματα διακίνησης ναρκωτικών. Τέλος, κρίθηκε σκόπιμη η αναφορά στις αλλαγές που επέφερε ο νέος Ποινικός Κώδικας στα άρθρα 45 και 47 ΠΚ, δηλαδή στις διατάξεις της συναυτουργίας και της συνέργειας.
description: The purpose of the present thesis is to present a series of important examples of participation in the drug trafficking crimes of Law 4139/2013, the analysis of the most interesting issues of participation faced by recent criminal case law in these crimes, but also a scientific criticism on these issues. A necessary criticism, because it leads to a fruitful dialogue between science and case law, as on many issues there are different opinions. Moreover, an attempt has been made to analyze and comment on some more marginal issues of direct and simple accessory, the case of the moral provocateur, but also a more specific issue of participation, which is the application of the 49 par. 2 of the Penal Code in drug trafficking crimes. Finally, it was deemed appropriate to refer to the changes brought by the new Penal Code in articles 45 and 47 to the provisions of complicity and accessory.
The effect of estrogen on inflammatory markers following prolonged aerobic exercise in eumenorrheic women
Creators: name: Walz, Elizabeth
Publisher: name: University of North Carolina at Chapel Hill
Year: 2014

description: The study purpose was to determine if estrogen (E2) concentrations attenuate inflammation after exercise-induced muscle damage. Blood responses of pro-inflammatory cytokine biomarker TNF-a, and pro- and anti-inflammatory cytokine biomarker IL-6 were measured. Ten, eumenorrheic, endurance-trained women (Mean±SD; 21±1 years, 24.1±2.8 body fat%) were studied. They completed a 60 minute running protocol at ~60-65% of their oxygen uptake (VO2peak 53.5±4.7ml/kg/min) during two hormonal conditions (low E2 and high E2). Inflammation was assessed at rest, immediately post exercise, 30 minutes post exercise, and 24 hours post exercise. There was not a significant interaction effect for TNF-a (p=0.60). There was a significant interaction effect for IL-6 (p=0.001). The response at 30 minutes post exercise was significantly elevated from rest and significantly reduced in high E2. Results suggest high E2 conditions attenuate the IL-6 response. Due to the pro- and anti-inflammatory influence of IL-6, it is unclear whether this attenuation is positive or negative.
The A-Cycle Problem for Transverse Ising Ring
Creators: name: Dong, Jian-Jun
name: Li, Peng
name: Chen, Qi-Hui
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Traditionally, the transverse Ising model is mapped to the fermionic c-cycle problem, which neglects the boundary effect due to thermodynamic limit. If persisting on a perfect periodic boundary condition, we can get a so-called a-cycle problem that has not been treated seriously so far (Lieb et al., 1961 \textit{Ann. of Phys.} \textbf{16} 407). In this work, we show a little surprising but exact result in this respect. We find the odevity of the number of lattice sites, $N$, in the a-cycle problem plays an unexpected role even in the thermodynamic limit, $N\rightarrow\infty$, due to the boundary constraint. We pay a special attention to the system with $N(\in Odd)\rightarrow\infty$, which is in contrast to the one with $N(\in Even)\rightarrow\infty$, because the former suffers a ring frustration. As a new effect, we find the ring frustration induces a low-energy gapless spectrum above the ground state. By proving a theorem for a new type of Toeplitz determinant, we demonstrate that the ground state in the gapless region exhibits a peculiar longitudinal spin-spin correlation. The entangled nature of the ground state is also disclosed by the evaluation of its entanglement entropy. At low temperatures, new behavior of specific heat is predicted. We also propose an experimental protocol for observing the new phenomenon due to the ring frustration.
description: 24 pages, 9 figures
The art of customer segmentation using a machine learning clustering method
Creators: name: Γαλάνης, Χρήστος Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Μηχανική μάθηση
Μέθοδος συσταδοποίησης
Συστηματική βιβλιογραφική προσέγγιση
Machine learning
Clustering method
Systematic literature review

description: The purpose of the study was the research that was conducted to discover the current status of machine learning clustering algorithms used mainly for customer segmentation. Furthermore, an application of a traditional and well-known clustering model i.e. K-means on a dataset took place. Also, regarding the methodology, in order the objective of the study to be achieved a thoroughly Systematic Literature Review (SLR) approach was followed. This method provides a systematic way of identifying articles based on criteria set by the author and eventually it is completed by determining the remaining articles. These articles are used in the research. Furthermore, a dataset selected from Kaggle was analyzed. This analysis was done using the python programming language in the jupyter notebook environment. Lastly, the findings, using the SLR method the past and present literature remained were presented. Moreover, using the k-means algorithm in the dataset 5 groups were created. The appropriate number to be taken as the optimal was supported by the elbow method. A variety of figures were used to draw insights after the implementation of the algorithm for example the distribution of the segments and the groups behavior based on specific features.
description: Σκοπός της μελέτης ήταν η έρευνα που πραγματοποιήθηκε με σκοπό να ανακαλύψει την τρέχουσα κατάσταση των αλγορίθμων συσταδοποίησης μηχανικής μάθησης που χρησιμοποιούνται κυρίως για την τμηματοποίηση των πελατών. Επιπλέον, πραγματοποιήθηκε η εφαρμογή ενός παραδοσιακού και γνωστού μοντέλου συσταδοποίησης, δηλαδή του K-means, σε ένα σύνολο δεδομένων. Επίσης, σχετικά με την μεθοδολογία, προκειμένου να επιτευχθεί ο στόχος της μελέτης, ακολουθήθηκε μια περιεκτική μέθοδος Συστηματικής Ανασκόπησης της Βιβλιογραφίας (Systematic Literature Review - SLR). Αυτή η μέθοδος παρέχει ένα συστηματικό τρόπο αναγνώρισης άρθρων βάσει των κριτηρίων που ορίζει ο συγγραφέας και τελικά ολοκληρώνεται με τον προσδιορισμό των εναπομείναντων άρθρων. Αυτά τα άρθρα χρησιμοποιήθηκαν στην έρευνα. Επιπλέον, αναλύθηκε ένα σύνολο δεδομένων που επιλέχθηκε από το Kaggle. Αυτή η ανάλυση πραγματοποιήθηκε χρησιμοποιώντας τη γλώσσα προγραμματισμού Python στο περιβάλλον του jupyter notebook. Τέλος, αναφορικά με αποτελέσματα, χρησιμοποιώντας τη μέθοδο της Συστηματικής Ανασκόπησης της Βιβλιογραφίας (SLR), παρουσιάστηκαν η παλαιότερη και η παρούσα βιβλιογραφία που παρέμειναν. Επιπλέον, χρησιμοποιώντας τον αλγόριθμο k-means στο σύνολο δεδομένων, δημιουργήθηκαν 5 ομάδες. Το κατάλληλο αριθμό για να θεωρηθεί ως βέλτιστος υποστηρίχθηκε από τη μέθοδο του "elbow". Χρησιμοποιήθηκε μια ποικιλία γραφημάτων για να αναδειχθούν εργαστηριακά συμπεράσματα μετά την εφαρμογή του αλγορίθμου, για παράδειγμα η κατανομή των τμημάτων και η συμπεριφορά των ομάδων βάσει συγκεκριμένων χαρακτηριστικών.