116 research outputs found
Dataset in support of the Southampton doctoral thesis 'The boatbuilding tradition of the Aegean during the Late Neolithic – Early Bronze Age periods. Typological classification, digital reconstruction and seakeeping assessment'
No full textDataset in support of the Southampton doctoral thesis 'The boatbuilding tradition of the Aegean during the Late Neolithic – Early Bronze Age periods. Typological classification, digital reconstruction and seakeeping assessment' Appendix D - Resistance data and Appendix C - Stability data.
This dataset is focused on two appendices:
Appendix D - Resistance data. D.1 Resistance data produced by the author via MAXSURF Resistance for this thesis.
Appendix C - Stability data
C1. Stability data – STIX and ISO criteria, produced by the author via MAXSURF Stability software for his thesis
This research was funded by Southampton Marine and Maritime Institute (SMMI), Vice-Chancellor's Scholarship, Greek Archaeological Committee UK (GACUK)
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Homophobic Statements, a Bishop, and the Limits of Freedom of Expression. An In-Depth Commentary on ECtHR 31.08.2023, Amvrosios-Athanasios Lenis v. Greece, no. 47833/20
No full textDichiarazioni omofobe, un vescovo e i limiti della libertà di espressione. Un commento approfondito su CEDU 31.08.2023, Amvrosios-Athanasios Lenis v. Greece, no. 47833/20.
ABSTRACT: The decision of the ECtHR of 31.08.2023, Amvrosios-Athanasios Lenis v. Greece (no. 47833/20), is a further step toward an increasingly dense jurisprudence on “hate speech” and the limits of freedom of expression. The public proclamation of religious doctrines that are in conflict with the values of the contracting States enshrined in the ECHR is protected to a certain extent by the fundamental right of freedom of religion and belief. However, the qualification of a statement as religious does not justify “hate speech.” The AUTHOR shows the tension between freedom of religion, freedom of expression, and protection against discrimination, and analyzes the decision against the backdrop of Article 17 of the ECHR (prohibition of abuse of rights).
SOMMARIO: 1. Preliminary Remarks - 2. The Concept of Hate Speech - 3. The Facts of the Case - 4. The Procedure and Reasoning of the Court - 4.1 The ECtHR’s Preliminary Considerations on Fundamental Rights - 4.2 Legal assessment - 4.3 Some Remarks on (the Non-Invoked) Article 9 of the ECHR - 5. Concluding Remarks
La tomba III di Haghios Athanasios e il valore semantico dell'incarnato
No full textThe tomb III at Haghios Athanasios stands out among the Macedonian tombs for the exceptional painted decoration of the temple-like façade. Excavated in the '90s by M. Tsimbidou-Avloniti it has been published by the scholar in full detail and the iconographic program of the monument has been the object of many publications. This article re-examines the different ways of reproducing the skin color (το ανδρείκελον) in the figures of the miniature frieze and in the megalographic figures beside the door. The realistic rendering of the megalographic figures of armed men in Macedonian attire, showing their sorrow for the lost of an etairos, is contrasting with the pale color of the participants to the symposion in the frieze above the door, a scene whose illusionistic overtone has been yet perceived by the critics. This symposion is articulated in three scenes and it can be interpeted as a necrodeipnon, but in the same time as a celebration of the Macedonian banquet style, centered on the royal court. The author suggests that the first figure on the right of the frieze, related to the group of armed men looking towards the banqueters feasting in the center of the frieze, can be read as the dead himself, for the particular rendering of his ανδρείκελον, showing the typical ochròtes or necròdes face color, according to the contemporary medical lexicon. The pathetic stance assumed by the same figure, the sole in the group which is not bearing arms, seems to confirm his role in the context of the scene
Analysis of the distance measurement using reflectorless total stations and research of the determination of points’ coordinates
No full text179 σ.Μεταπτυχιακή Εργασία - - Εθνικό Μετσόβιο Πολυτεχνείο. Διεπιστημονικό - Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (Δ.Π.Μ.Σ.) "Γεωπληροφορική"Αντικείμενο της εργασίας είναι η διερεύνηση των δυνατοτήτων των γεωδαιτικών σταθμών, οι οποίοι μετρούν μήκη χωρίς τη χρήση ανακλαστήρα (Reflectorless), κατά τον προσδιορισμό της θέσης σημείων σε εφαρμογές υψηλής ακρίβειας. Η εργασία αποτελείται από έξι κεφάλαια: Στο πρώτο κεφάλαιο παρουσιάζεται αναλυτικά η λειτουργία των reflectorless γεωδαιτικών σταθμών. Δίνονται ιστορικά στοιχεία σχετικά με την εξέλιξη των γεωδαιτικών σταθμών καθώς και τα χαρακτηριστικά της μέτρησης μηκών με ακτινοβολία laser όλων των τάξεων. Το κεφάλαιο επικεντρώνεται στις δύο μεθόδους που χρησιμοποιούν σήμερα τα όργανα αυτά για τη μέτρηση μηκών χωρίς τη χρήση ανακλαστήρα και στη μεταξύ τους σύγκριση αλλά και στη νέα μέθοδο που συνδυάζει και αξιοποιεί τα πλεονεκτήματα των δύο χρησιμοποιούμενων μεθόδων. Το κεφάλαιο ολοκληρώνεται με την καταγραφή των κυριότερων γεωδαιτικών σταθμών που χρησιμοποιούνται σήμερα και των χαρακτηριστικών τους. Στο δεύτερο κεφάλαιο περιγράφονται οι μέθοδοι προσδιορισμού της θέσης σημείων, οι οποίες χωρίζονται σε μεθόδους προσδιορισμού υψομετρικών διαφορών (3η διάσταση) και σε μεθόδους προσδιορισμού θέσης στο επίπεδο ή στο χώρο (2 και 3 διαστάσεις αντίστοιχα), όπου και αναλύονται η ακρίβεια κάθε μεθόδου και οι παράγοντες που την επηρεάζουν. Γίνεται εκτεταμένη ανάλυση της μεθόδου της Τριγωνομετρικής Υψομετρίας Ακριβείας (ΤΡΥΑ) για τον προσδιορισμό υψομετρικών διαφορών προσιτών και απρόσιτων σημείων, η οποία χρησιμοποιείται στην πρώτη εφαρμογή με reflectorless γεωδαιτικούς σταθμούς (μέτρηση του υψομετρικού δικτύου του γηπέδου Καραϊσκάκη). Στο τρίτο κεφάλαιο αναπτύσσεται η εφαρμογή της συγκεκριμένης μεθόδου στη μέτρηση του υψομετρικού δικτύου του Γηπέδου Καραϊσκάκη. Το δίκτυο μετράται και συνορθώνεται καταλήγοντας έτσι στα υψόμετρα των σημείων ελέγχου. Πραγματοποιείται σύγκριση σε συγκεκριμένες υψομετρικές συνδέσεις που είχαν μετρηθεί σε προηγούμενη εργασία με τη διαδικασία της ψηφιακής γεωμετρικής χωροστάθμησης. Στο τέταρτο κεφάλαιο αναλύεται διεξοδικά η διαδικασία μέτρησης μιας γερανογέφυρας στο χώρο της Χαλυβουργικής. Οι μετρήσεις πραγματοποιούνται με τη μέθοδο των πολικών συντεταγμένων. Σκοπός της παρούσας εφαρμογής είναι η διερεύνηση των ακριβειών που επιτυγχάνονται με τη μέθοδο των πολικών συντεταγμένων (σε σχέση με τη μέθοδο της εμπροσθοτομίας που παραδοσιακά χρησιμοποιείται σε παρόμοιες εφαρμογές) και η καταλληλότητά της για τον έλεγχο των προδιαγραφών ασφαλείας της γερανογέφυρας. Στο πέμπτο κεφάλαιο αναπτύσσεται η διαδικασία προσδιορισμού της θέσης απρόσιτων σημείων (συγκεκριμένα ενός καλωδίου μεταφοράς ηλεκτρικού ρεύματος). Αναπτύσσεται η διαδικασία της γεωμετρικής τεκμηρίωσης του καλωδίου και η διερεύνηση προσαρμογής σε αυτό πολυωνυμικής καμπύλης, αλλά και η σύγκριση μεταξύ δύο διαφορετικών μετρήσεων σε διάστημα 3 μηνών. Τέλος, το έκτο κεφάλαιο αποτελεί τον επίλογο της εργασίας, καθώς αναφέρονται σε αυτό τα τελικά συμπεράσματα σχετικά με τη χρήση των reflectorless γεωδαιτικών σταθμών στις τρεις εφαρμογές που αναπτύχθηκαν, γίνεται μια ανακεφαλαίωση και αξιολόγηση των εργασιών και δίνονται ενδεικτικά ορισμένες προτάσεις για περαιτέρω χρήση των αποτελεσμάτων.In the first chapter the operation of the modern reflectorless total stations is presented extensively. Historical elements with regard to the development of total stations, as well as the characteristics of the distance measurement using laser radiation are given. The chapter is focused in both used methods for the distance measurement by the total stations. The methods are compared. A brand new method that combines the advantages of the two previous methods is described. The chapter ends with a detailed list of the today widely used total stations including their characteristics. In the second chapter some of the classical methods for the points’ coordinates determination are described. Methods for the height determination (3rd dimension) and for 2D and 3D determination are referred. The precision of each one and the factors that affect them are also analyzed. Extensive analysis of the method of the Accurate Trigonometric Heighting (ATH) for the determination of the height differences between accessible or/and inaccessible points is attained. The precision of the intersection method is also analyzed. The third chapter presents the use of the method of ATH for the vertical control network of the Karaiskaki Stadium. The network is measured and adjusted. The heights of the control points are calculated. The results are evaluated in reference to the precision succeeded and the time needed. Comparisons between specific height differences that had been measured using spirit levelling in a previous work is carried out. The fourth chapter deals with the process of the measurement of a crane. The method of polar coordinates is used. The aim of the present application is the investigation of the precision could achieved using the polar coordinates’ method (instead of the intersection method that is traditionally used in similar applications) and its appropriateness for the control of the safety specifications of the crane. In the fifth chapter the process for the determination of the position of the inaccessible points of an electric power transportation cable is developed. The process of the geometric documentation of the cable and the investigation of the best polynomial fitting curve are analyzed. Finally, in the last chapter (6th) the conclusions and the proposals that were came out by this work are presented.Αθανάσιος Ε. Ηλιοδρομίτη
Ageing Behavior of Porous and Dense Asphalt Mixtures in the Field
No full textBitumen ageing is one of the principal factors causing the deterioration of asphalt pavements. As bitumen ages, the pavement loses its ability to relax stresses during loading/unloading and thermal cooling process, thus the risk of cracking increases. Oxidation and ultraviolet (UV) radiation are believed to be the main factors that can cause bitumen ageing during pavement service life. The aim of this study is to evaluate the mechanical behavior of porous and dense asphalt pavements during field ageing. Pavement test sections were constructed in 2014 and are being exposed to actual environmental conditions since then. To investigate the effect of UV radiation on ageing, UV reflective glass-plates were utilized to cover part of the pavement surface. To study the evolution of the pavements’ mechanical properties, asphalt cores were collected from the test sections periodically (at one-year intervals). The changes in the stiffness modulus of the mixtures were determined via cyclic indirect tensile tests. The results show that the effect of mineral aggregate packing, and hence of air-void distribution and connectivity, on the ageing sensitivity (both thermal and UV ageing sensitivity) of the pavements with time was found to be significant, as the changes of the stiffness of the porous mixtures were greater than that of dense mixtures.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Pavement Engineerin
Impact of synthetic fibres on asphalt concrete mix
No full textThe use of synthetic fibres has been reported to enhance the performance of asphalt pavement materials in terms of permanent deformation, fatigue and thermal cracking. However, limited results about the benefits of synthetic fibres in the reinforced warm-mix asphaltic materials, and the exact mechanism of reinforcing the binding part in pavement structures is still unclear. In this contribution, a semi-circular bending test was per-formed by using various fibre amounts as well as fibre length inside the bituminous mix. The results indicate that the inclusion of fibre can improves the warm-mix performance. Tensile strength as the first criterion is en-hanced proportionally by increasing fibre dosage. The reinforcing effect brought by 38-mm fibre is higher than the one with 19-mm.Pavement Engineerin
Hierarchical frameworks for efficient prehensile rearrangement with a robotic manipulator
No full textRearranging multiple objects is a critical skill for robots so that they can effectively deal with clutter in human spaces. This is a challenging problem as it involves combinatorially large, continuous C-spaces involving multiple movable bodies and complex kinematic constraints. This work aims to identify ways of decomposing such problems into a hierarchy of challenges that can be addressed effectively individually, while their composition can provide a solution to the overall instance. The first direction for such a hierarchical decomposition aims to take advantage of developments in the multi-robot community, where there are efficient solvers for the “pebble motion on a graph” problem. Unlabeled rearrangement problems with a robotic manipulator are decomposed into a sequence of subproblems, each one of which can be viewed as a “pebble motion on a graph” problem. The labeled case, however, is not easily decomposed to a “pebble motion on a graph” problem instances. To deal with general object rearrangement, including both the labeled and the unlabeled case, this work builds on top of prior work that was able to compute solutions for labeled monotone instances through a backtracking search process. Monotone instances are those where every object needs to be transferred at most once to achieve a desired arrangement. This thesis extends the backtracking process to a method that addresses many non-monotone challenges. In order to solve the non-monotone cases the method is using solutions to the Minimum Constraint Removal (MCR) path problem so as to transfer each object to its target. An MCR path minimizes the number of constraints that need to be removed from the path of an object. This work then utilizes the monotone or the non-monotone backtracking search process as local connection primitives in the context of a higher-level task planner, which operates similar to a Probabilistic Roadmap Method (PRM), that searches the space of object placements. It is shown that the integration of these primitives with the higher-level planner achieves probabilistic completeness guarantees for the general object rearrangement problems. To improve the efficiency of the above hierarchical framework, this work introduces approximate but significantly faster primitives for monotone and non-monotone rearrangement instances. The methods avoid backtracking search by building a dependency graph between objects given solutions to the Minimum Constraint Removal (MCR) path planning problem to transfer each object to its target. From this graph, the approach discovers the order of moving objects by performing topological sorting. These new approximate but fast primitives that do not need backtracking search are incorporated in a higher-level incremental search algorithm for general rearrangement planning, which operates similar to a Bi-directional Rapidly-exploring Random Tree (Bi-RRT). Given a start and a goal object arrangement, tree structures of reachable new arrangements are generated by using the new and fast approximate primitives as an expansion procedure. These methods have been evaluated in simulation using models of robotics manipulators, such as a Baxter or a Motoman robot arm, in order to study their capability in solving difficult instances of rearrangement problems. This work compares the different alternatives in terms of success ratio, running time, scalability and path quality. Overall, this work aims to emphasize the benefit of using more powerful primitives, which are reasoning about the combinatorial and the underlying multi-object nature of the rearrangement problem, in the context of high-level task planning for robotic manipulation.Ph.D.Includes bibliographical referencesby Athanasios Krontiri
Human disease on stage
No full textTheater, being in most cases a representation of real life, can refer to anyone of its aspects, including disease. Human disease is a specific condition associated with several effects in the behavior of both, the patient and his environment, as well as their interrelationship. Several play writers, even from the ancient years, have tried to present these effects. Furthermore, another topic for the theater can be the way Medicine is practiced, usually with a critical approach.
Of course play writers have not in general studied Medicine and so their references to disease may not be always absolutely right, especially if they represent aspects of past time. Furthermore, if we refer to poetic or symbolic drama it may express unrealistic situations only to serve the main idea of the author
A gauge-invariant unique continuation criterion for waves in asymptotically Anti-de Sitter spacetimes
No full textWe reconsider the unique continuation property for a general class of
tensorial Klein-Gordon equations of the form \begin{align*} \Box_{g} \phi +
\sigma \phi = \mathcal{G}(\phi,\nabla \phi) \text{,} \qquad \sigma \in
\mathbb{R} \end{align*} on a large class of asymptotically anti-de Sitter
spacetimes. In particular, we aim to generalize the previous results of
Holzegel, McGill, and the second author [14,15,24] (which established the
above-mentioned unique continuation property through novel Carleman estimates
near the conformal boundary) in the following ways: (1) We replace the
so-called null convexity criterion (the key geometric assumption on the
conformal boundary needed in [24] to establish the unique continuation
properties) by a more general criterion that is also gauge invariant. (2) Our
new unique continuation property can be applied from a larger, more general
class of domains on the conformal boundary. (3) Similar to [24], we connect the
failure of our generalized null convexity criterion to the existence of certain
null geodesics near the conformal boundary. These geodesics can be used to
construct counterexamples to unique continuation. Finally, our gauge-invariant
criterion and Carleman estimate will constitute a key ingredient in proving
unique continuation results for the full nonlinear Einstein-vacuum equations,
which will be addressed in a forthcoming paper of Holzegel and the second
author [16].Comment: 46 pages, 5 figures, minor changes, added references. Matches the
published versio
Author Correction: Future response of global coastal wetlands to sea-level rise (Nature, (2018), 561, 7722, (231-234), 10.1038/s41586-018-0476-5)
No full text
Change history: In Fig. 2b of this Letter, ‘Relative wetland change (km
2
)’ should have read ‘Relative wetland change (%)’ and equations (2) and (3) have been changed from ‘RSLR
crit
= (m × TR
e
) × Sed + i’ and ‘Sed
crit
= (RSLR − i)/(m × TR
e
)’, respectively. The definition of the variables in equation (2) has been updated. These errors have been corrected online.
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