523 research outputs found
The Δρομοδείχτης της Ελλάδος of 1824 and Athanasios Stageirites (Τίτλος περίληψης)
No full textσ. [281]-290Κείμενο στα ελληνικά με περίληψη στα αγγλικά με τον τίτλο: The Δρομοδείχτης της Ελλάδος of 1824 and Athanasios StageiritesThe article first examines the close relationship between the publication “Δρομοδείχτης της Ελλάδος” [1824] and the publication “Ηπειρωτικά” (1819) by Athanasios Stageirites and then suggests that Athanasios Stageirites is the likeliest author of the “Δρομοδείχτης της Ελλάδος”.Δωδώνη: Τεύχος Πρώτο: επιστημονική επετηρίδα του Τμήματος Ιστορίας και Αρχαιολογίας της Φιλοσοφικής Σχολής του Πανεπιστημίου Ιωαννίνων; Τόμ. 43-44 (2014-2015
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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The EU's role in catalyzing a settlement in Cyprus : Providing incentives and imposing conditionality in the Cyprus conflict
No full textΤο 1987 η Τουρκία και το 1990 η Κυπριακή Δημοκρατία- ως η αναγνωρισμένη αρχή που εκπροσωπεί όλο το νησί- υπέβαλαν την αίτησή του για ένταξη στις Ευρωπαϊκές Κοινότητες (αργότερα Ευρωπαϊκή Ένωση/ Ε.Ε). Η γνωμοδότηση της Commission πάνω στην ενταξιακή πορεία της Κύπρου (1993) υπογραμμίζει την επίλυση του Κυπριακού ως προϋπόθεση για την ένταξη της Κύπρου στην Ε.Ε. Την ίδια τακτική ακολούθησαν οι Ευρωπαϊκοί θεσμοί και με την Τουρκία, αφού η επίλυση του Κυπριακού και η καλή θέληση της χώρας κατά τις διαπραγματεύσεις-υπό την αιγίδα των Ηνωμένων Εθνών- αποτελούσαν πολιτική προϋπόθεση για την ένταξη της χώρας στην Ε.Ε. Η σταδιακή άρση της αιρεσιμότητας του Κυπριακού προβλήματος στους Ελληνοκυπρίους, στην οποία συνέβαλε και ο ρόλος της Ελλάδας στα ευρωπαϊκά όργανα, άλλαξε τα δεδομένα και ευνόησε την ένταξη της Κυπριακής Δημοκρατίας, την περίοδο που η Τουρκική αίτηση φαινόταν να είναι στάσιμη. Ο ιστορικός συμβιβασμός που επετεύχθη στο Ευρωπαϊκό Συμβούλιο στο Ελσίνκι το 1999, κατέστη σχεδόν βέβαιη τη συμπερίληψη της Κύπρου στην 5η διεύρυνση ενώ η Τουρκία απέκτησε τον τίτλο του υποψήφιου για ένταξη στην Ε.Ε κράτους. Το 1999 εγκαινιάζεται και μια νέα περίοδος επαναπροσέγγισης και βελτίωσης ελληνο-τουρκικών σχέσεων μετά την παγωμένη περίοδο του 1993-1998 όπου το Ελληνικό και το Τουρκικό στοιχείο (Ελλάδα-Τουρκία και Ελληνοκύπριοι- Τουρκοκύπριοι) είχαν επικίνδυνες τριβές (Ίμια 1996, τα γεγονότα της Πράσινης Γραμμής το 1996, Πύραυλοι S-300 κλπ.). Οι διαπραγματεύσεις στις αρχές του 2000' είχαν ως βάση το σχέδιο του Γενικού Γραμματέα του Οργανισμού Ηνωμένων Εθνών ,Kofi Annan. Ο Πρόεδρος της Κύπρου Γλαύκος Κληρίδης, αν και είχε δείξει ειλικρινή διάθεση για εξεύρεση λύσης αντικαταστάθηκε το 2003 από τον Τάσσο Παπαδόπουλο, ο οποίος ήταν αρνητικά διακείμενος προς το Σχέδιο Ανάν. Οι βουλευτικές εκλογές στη βόρεια Κύπρο το 2003 ανέδειξαν ένα νέο πολιτικό προσωπικό διατεθειμένο να δεχθεί το σχέδιο Ανάν και να προσχωρήσει στην Ε.Ε παρά την δυσαρέσκεια του Προέδρου Ντενκτάς για την προτεινόμενη λύση. Τέλος, η εκλογή του Κόμματος Δικαιοσύνης και Ανάπτυξης (AKP) το 2002 στην Τουρκία, έφερε στο προσκήνιο βουλευτές με φιλο-ευρωπαϊκή ατζέντα και διάθεση για υποχωρήσεις στο θέμα του Κυπριακού. Στο δημοψήφισμα της 24ης Απριλίου 2004, περίπου 65% των Τουρκοκυπρίων ψήφισαν υπέρ του Σχεδίου Ανάν, ενώ το 76.8% των Ελληνοκυπριακού πληθυσμού το καταψήφισαν. Ποιός ήταν ο ρόλος της Ευρωπαϊκής Ένωσης και πώς επηρέασε το αποτέλεσμα; Κρίνοντας εκ του αποτελέσματος ήταν αποτυχημένη η πολιτική της Ε.Ε προς τους κύριους παίχτες της Κυπριακής διένεξης και πως επηρέασε τη συμπεριφορά του καθενός; Σε τι οφείλεται η αρνητική στάση των Ελληνοκυπρίων προς το σχέδιο Ανάν; Τι θα μπορούσε να είχε κάνει η Ε.Ε διαφορετικά; Τέλος, το Σχέδιο Ανάν ήταν συμβατό με τις κύριες διεκδικήσεις των Ελληνοκυπρίων;Turkey in 1987 and the Republic of Cyprus- as the recognized authority representing the whole island- in 1990 applied for European Communities’ membership signaling the beginning of EC’s (later European Union/E.U) interference in the Cyprus Conflict. Commission’s Opinion on Cyprus’ EC application (1993) underlined that a settlement in Cyprus was a prerequisite for the island’s EU accession. The European institutions followed the same policy for Turkey, since a settlement in Cyprus and Turkey’s good will during the negotiations- under the United Nations aegis- constituted a political requirement for Turkey’s EU membership. The gradual lifting of the settlement conditionality for the Greek-Cypriots, to which Greece contributed by utilizing its role in the European fora, brought a major change and favored Cyprus’ accession course, while Turkey’s application seemed to be at a stalemate. The historical compromise that took place in Helsinki during the 1999 European Council, certified Cyprus’ inclusion in the fifth enlargement, while Turkey was granted candidate status. The 1993-1998 period of hostility and tension between Greece and Turkey but also between the two communities in Cyprus (Imia 1996, Green line events in 1996, S-300 missiles’ crisis etc.) was succeeded by a new era of rapprochement and improvement of inter-state and intra-state relations. The basis for the early 2000’s negotiations was the plan proposed by the UN Secretary General Kofi Annan. The President of the Republic of Cyprus, Glafcos Clerides displayed a compromising stance towards the Plan but was succeeded after the 2003 elections by Tassos Papadopoulos, who was skeptical of the Annan Plan. The parliamentary elections in northern Cyprus featured a new wave of MPs willing to accept the Annan Plan and seek EU membership, despite Denktash’ disappointment for the proposed resolution. Finally, the election of AKP (Justice and Development Party) in 2002 in Turkey highlighted a pro-European agenda and willingness to make concessions regarding the Cyprus issue. During the 24th April 2004 referenda, 65% of the Turkish-Cypriots voted in favor of the Annan Plan, while 76.8% of the Greek-Cypriot people voted against it. What was the EU’s role in the process and how did it affect the outcome? Judging by the referenda, was the EU’s policy towards the main players of the Cyprus conflict failing and how did it influence the policy of each player? How could the EU have acted differently? Last but not least, was the Annan Plan aligned to the main Greek-Cypriot demands
Peak power reduction algorithms in asymmetric digital subscriber line modems
No full textThesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.Includes bibliographical references (leaves 94-96).This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.This thesis investigates peak-to-average ratio (PAR) reduction techniques for multicarrier modulation systems, such as discrete multitone (DMT) modems and orthogonal frequency-division multiplexed (OFDM) terrestrial broadcast transmitters. Through simulation and test implementation on a state-of-the-art programmable ADSL development platform, this thesis pursues a suitable solution for minimizing PAR given the resources of a programmable platform. This solution is integrated as a prototype implementation into a fully-functional ADSL modem and optimized for maximum PAR reduction performance within modem complexity constraints.by Athanasios Dimitri Dousis.M.Eng
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
Computational Modelling of Compaction in Asphaltic Mixtures and Geomaterials
No full textAsphaltic mixtures are heterogeneous composite materials consisting of aggregates coated and bound by asphalt binder. The long term performance of asphaltic pavements is highly dependent on the mechanical behaviour of the asphaltic mixture during construction (mixing and compaction) and operation; inadequate mixture compaction leads to faster moisture and oxygen diffusion, ravelling, rutting and poor fatigue life
Moisture damage susceptibility of asphalt mixtures: Experimental characterization and modelling
No full textA well-functioning, long-lasting and safe highway infrastructure network ensures the mobility of people and facilitates the transport of goods, promoting thus environmental, economic, and social sustainability. The development of sustainable highway infrastructure requires, among other activities, the construction of pavement systems with enhanced durability. Moisture damage in asphalt pavements is associated with inferior performance, unexpected failures and reduced service life. All of these contribute to the increase of operational and maintenance costs in order to fulfill the intended service life of the pavement system. Moreover, global warming and climate change events such as temperature extremes, high mean precipitation and rainfall intensity may further increase the probability and rate of pavement deterioration. This dissertation aims to obtain an advanced understanding of the influence of moisture on pavement durability by developing a set of tools, i.e. experimental methods and computational models, which will provide insight into the fundamental moisture damage processes and on their impact on pavement systems. Based on this knowledge, researchers and practitioners will be able not only to design pavements with increased resiliency, thereby providing reliable services to road users, but also to minimize the risks in the face of changing climate conditions.Moisture diffusion is well-known to degrade the mechanical properties of asphalt mortars, namely bitumen, filler and sand, thus increasing the propensity of pavements to cracking. To determine the changes in the cohesion properties of the mortar, uniaxial tension tests were performed. Mortar samples were prepared and then subjected to five combinations of moisture and thermal conditioning, in an attempt to reproduce the various conditioning states that pavements undergo in the field, before being tested. Tensile strength and fracture energy were used to evaluate the changes in mechanical properties due to the various conditioning protocols. To post-process the experimental data, a new data analysis procedure was suggested in order to obtain a more accurate calculation of fracture energy. The procedure uses nonlinear finite element analysis to specify the unloading response outside the fracture zone, and then utilizes this information to compute the fracture energy of the binders. This methodology yields a framework for the calculation of fracture energy when only force-displacement data are available and therefore the estimation of the true stress-strain curve is not feasible.The experimental investigation revealed the deteriorating impact of moisture on the fracture characteristics of asphalt mortars, especially as regards to their low temperature properties. These effects were not reversible upon drying. On the contrary, the application of a drying cycle caused embrittlement of the mortars and indicated that continuous wet and drying cycles in the field may result in materials with poor performance characteristics. Also, the application of freeze-thaw cycles was shown to increase the susceptibility of mortars to low temperature cracking. Nevertheless, on the whole, the effect of freeze-thaw on fracture properties was observed to depend on the conditioning state (dry or wet) and composition of the mortars. The use of additives, such as hydrated lime filler and SBS modifiers, were found to improve the wet strength and fracture energy of the mortars. On the basis of moisture uptake measurements, it was confirmed that the chemical composition influences significantly the diffusivity characteristics of the mortars. Also, the maximum moisture uptake was found to be the main parameter that dictates the intensity of mortar damage. In addition, moisture susceptibility was studied at mixture level. At this level, besides moisture diffusion, excess pore pressure can contribute to the degradation of mixture performance depending on the mixture type, the traffic loading and the environmental conditions. Hence, a moisture conditioning protocol that comprises two conditioning types, namely bath immersion and pore pressure application, was proposed for evaluating susceptibility of asphalt mixtures to moisture. Also, evidence was collected of the effect that dynamic pore pressure has on mixture degradation by means of X-ray computed tomography and image analysis techniques. The two damage mechanisms were found to be relatively independent from each other, suggesting that an asphalt mixture can be more prone to one damage mode than the other, depending on its composition. The proposed protocol captures both processes that occur when water interacts with a pavement and can provide more reliable conclusions with regard to mixture sensitivity.In order to improve our perception of the influence of material microstructures on moisture sensitivity of the asphalt composite, an energy-based elasto-visco-plastic model with softening was implemented to model damage due to the coupled effects of moisture diffusion and mechanical loading. The model consists of a generalized Maxwell model, with hyperelastic springs and viscous time-dependent components, in series with an inelastic component that accounts for the irreversible processes within the microstructure of the material. Then, a computational scheme was proposed by means of a staggered approach: first a three-dimensional diffusion model was applied to obtain information on the accumulation of moisture within the mixtures and then the elasto-visco-plastic model was used to quantify mortar damage due to moisture diffusion. This method was successfully applied to study the influence of mixture morphology on moisture sensitivity. The results demonstrated that moisture content in a mixture strongly depends on its morphology, whereas the interconnectivity of the voids network controls the rate of damage development. Also, the analysis revealed the positive effect of using binders with high resistivity against moisture and quantified the benefits that would arise due to this choice, especially when designing porous mixtures that have an intrinsic sensitivity to moisture due to their morphological characteristics.More broadly, frost damage can be classified as part of the moisture damage related mechanisms. In the field, frost damage can be mainly attributed to the expansion of water accumulated in the pores of the pavement at sub-zero temperatures that causes additional stresses to the pavement structure. A numerical scheme to simulate frost damage was proposed. This scheme comprises a model that simulates the volume expansion of water during the water-to-ice phase-change, a thermal conduction model to simulate temperature distribution in the pavement, and the elasto-visco-plastic model to determine critical areas with a propensity to cracking on the basis of the pavement stresses.In conclusion, this thesis contributes to establishing a relationship of the physico-mechanical properties of the constituent materials and mixture morphology with the moisture susceptibility of pavement structures. The proposed experimental methods and computational models can serve as tools to investigate a great variety of parameters before a pavement structure is actually built. This allows for new materials and mixture designs to be investigated and the risks involved with their use to be minimized.<br/
Aging of Asphalt Symposium: Delft, the Netherlands September 17th 2014
No full textTechnical specifications for the asphalt concrete properties are developed to be able to specify mixtures that will perform well in pavement applications. Being able to identify and determine properties related to pavement performance in practice is crucial for both road authorities and contractors, since it allows for design and risk management by determining design life times and reliability. However, the properties of Asphalt Concrete (AC) change over its lifetime and since most pavement layers last for a decade or more these changes are crucial in determining the performance in practice.For many of the standard materials the effect of aging is implicitly dealt with in the safety factors that also account for other effects such as the variation rest periods/healing and variations in traffic and weather in the design methods and specifications. Rapid changes in the materials used (increasing percentages reclaimed asphalt, bio‐bitumen, rejuvenators, waste materials) and in theproduction of both bitumen (new refining methods resulting in different composition of bitumen) and asphalt concrete itself (warm mix asphalt, porous asphalt concrete, rubber asphalt mixtures) lead to increased uncertainty in the effects of aging. As a result, the uncertainties in pavement performance increase, which means the prediction of maintenance and the necessary budgets is getting more inaccurate.In order to maintain the ability to reliably design and maintain pavements and determine the most cost‐effective solutions for a given situation, a better understanding of the aging processes and objective methods to take into account aging effects on material properties is needed. This need is widely recognized, in the USA the Mechanical Empirical Design Guide takes aging into account through aging tests on the bitumen used and in Europe CEN TC227 works on establishing a method to assess the aging sensitivity of asphalt mixtures. This symposium aimed at combining the existing information and insights from ongoing research into recommendations that will allow thedevelopment of methods to determine aging sensitivity and the impact on pavement performance, facilitate the exchange of obtained data and stimulate further developments The resulting recommendations are: Do make long term aging sensitivity of binders part of the bitumen standards and take the results from the aging sensitivity of binders into consideration when assessing AC properties.Be aware that RTFOT testing only gives an indication of the sensitivity of a penetration grade binder to aging during hot mix production and construction, it doesn’t work for hard grades, PMB’s or warm mixes. Because of the many variables involved, developing one test method to characterise aging sensitivity seems improbable. However, PAV aging is both practical and, if tests at various conditions are carried out, able to give kinematic properties. A PAV protocol for testing at two temperatures and time intervals could provide practical characterisation information forthe short term and enable model development and validation on the long term. RCAT and other aging procedures could also be used in this sense, but considering the availability of equipment and the wide spread experience, PAV is the best candidate to allow the rapid development of international experience with the approach.Based on the current standards and the work presented during the symposium, PAV tests at 90 and 100 degrees Celsius and 20 and 40 hours, respectively, are suggested. The low values for temperature and duration are based on the current standards and fit both the USA and CEN procedure, while research shows that after 40 hours at 100 degrees the chemical (FTIR) and rheological (DSR) properties of laboratory aged and field samples were similar (Section6.5 and 8.5). At 100oC the temperature is low enough so that the effect of secondary reactions is negligible. As such, these conditions are appropriate for kinetic expressions for in service pavement performance. For high temperature processes and possibly also for repeated recycling (very long term) more sophisticated methods are needed. Set‐up and maintain field monitoring of temperature and UV radiation in various climate zones, as well as regular sampling over time and height to keep checking the predicted changes (from both tests and models), versus the actual changes in properties order to ensure reliability of the data as well as the applicability for pavement performance prediction. In setting up field tests, it is important to get both the composition of the virgin bitumen and the composition after mixing, transport and placement in the pavement. Thesecompositions provide the starting points from both the material and pavement structure point of view and can be used to assess the development of aging products over time. There is a lot of discussion about the impact of binder recovery methods on the observed composition, so until it is proven that this does not have an influence, for comparisons the same recovery method should be used. Set up a coordination and support action on AC‐Aging to continue to exchange information and experiences, both in research and in construction projects. develop an IR testing protocol, to facilitate the exchange of results and information. Compare the bitumen composition that is found through various recovery methods toestablish if there is an effect and if so, develop a procedure to address this. To further understanding of aging, a Round Robin test on the differences in test conditions between US and EU, allowing better access to each other’s data and knowledge would be seful. When developing aging tests for AC, it would be useful to look at the US experience. As long as there is no fundamentally correct method for assessing the aging, it would be preferable to standardize it as much as possible in order to allow cooperation and exchange of data.Pavement Engineerin
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