cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
African Peer Review Mechanism (APRM): A Building Block for Pan-Africanism
Creators: name: Michael Akin Popoola
name: Deborah Ebunoluwa Adeyomoye
name: Charles Akpuh
name: Enoch Olayiwola Oke
name: Odunayo Damilola Adeleke
Publisher: name: Zenodo
Year: 2024
Subjects: Development, Integration, Pan-Africanism, Peer-Review, Renaissance.

description: Abstract

The crave for solidarity and cooperation among African states is dated back to the pre-independent era when some African nationalists, ravished with the quest of freedom from the clutches of colonialism, enliven  pan-Africanism interest especially after the end of the Second World War. Following the political independence of some African states in early 1960s, the philosophy of Pan-Africanism inspired the establishment of the Organisation of African Unity (OAU) as the major driver of continental integration and unity among the newly independent African countries. Over the years, several institutions have been established and/or transformed in a bid to realise the vision of pan Africanism. The African Peer Review Mechanism (APRM) is one of such institutions. The APRM is a voluntary arrangements among African nations to evaluate and review the performance of a state by other states with the aim of promoting best practices, generating economic growth, encouraging good governance and ensuring political stability which would eventually culminate in sub-regional and continental integration. This study, which set out to access the performance of APRM over the years found that the institutions has been experiencing a serious slow-down in its performance since its establishment, due to lack of commitment to it by the leaders of African states and the primordial values and culture of African states. The research however observed that if well implemented, APRM could be a veritable avenue to improve governance, guarantee standards and best practices, generate high economic growth and accelerate sub-regional and continental economic and political integration which is also the dream of pan-Africanists.
S-matrix bootstrap in 3+1 dimensions: regularization and dual convex problem
Creators: name: He, Yifei
name: Kruczenski, Martin
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The S-matrix bootstrap maps out the space of S-matrices allowed by analyticity, crossing, unitarity, and other constraints. For the $2\rightarrow 2$ scattering matrix $S_{2\rightarrow 2}$ such space is an infinite dimensional convex space whose boundary can be determined by maximizing linear functionals. On the boundary interesting theories can be found, many times at vertices of the space. Here we consider $3+1$ dimensional theories and focus on the equivalent dual convex minimization problem that provides strict upper bounds for the regularized primal problem and has interesting practical and physical advantages over the primal problem. Its variables are dual partial waves $k_\ell(s)$ that are free variables, namely they do not have to obey any crossing, unitarity or other constraints. Nevertheless they are directly related to the partial waves $f_\ell(s)$, for which all crossing, unitarity and symmetry properties result from the minimization. Numerically, it requires only a few dual partial waves, much as one wants to possibly match experimental results. We consider the case of scalar fields which is related to pion physics.
description: 54 pages, 6 figures; v3: clarifications and comments added (footnote 1, end of section 2.3, after eqs.(2.26) and (3.33)), figures 5 and 6 comparing S-wave from primal/dual results added; accepted by JHEP
A conditional model of abduction
Creators: name: Becher, Verónica
Publisher: name: University of British Columbia
Year: 2008

description: We propose sometimes very plausible hypotheses as explanations for an observation, given what we know or believe. In light of new information, however, such explanations may become void. Under this view explanations are defeasible. In this thesis we present a general model of explanation in artificial intelligence based on a theory of belief revision, (or the process of expanding, correcting and contracting existing beliefs) which models the dynamics of belief in a given representation. We take seriously the notion that explanations can be constructed from default knowledge and should be determined relative to a background set of beliefs. Based on the idea that an explanation should not only render the observation plausible but be itself maximally plausible, a preference ordering on explanations naturally arises. Our model of abduction (the process of inferring the preferred explanations) uses existing conditional logics for default reasoning and belief revision, based on standard modal systems. We end up with a semantics for explanation in terms of sets of possible worlds, which are simple modal structures also suitable for other forms of defeasible reasoning. The result of this thesis is an object-level account of abduction based on the revision of the epistemic state of a program or agent. Abductive frameworks like Theorist, and consistency based diagnosis (today's "canonical" frameworks for diagnosis) are shown to be captured in our work.
Well-Founded Extensive Games with Perfect Information
Creators: name: Apt, Krzysztof R.
name: Simon, Sunil
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Science and Game Theory (cs.GT)
subject: FOS: Computer and information sciences

description: We consider extensive games with perfect information with well-founded game trees and study the problems of existence and of characterization of the sets of subgame perfect equilibria in these games. We also provide such characterizations for two classes of these games in which subgame perfect equilibria exist: two-player zero-sum games with, respectively, two and three outcomes.
description: In Proceedings TARK 2021, arXiv:2106.10886
Direct numerical computation of disorder parameters
Creators: name: D'Elia, Massimo
name: Tagliacozzo, Luca
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In the framework of various statistical models as well as of mechanisms for color confinement, disorder parameters can be developed which are generally expressed as ratios of partition functions and whose numerical determination is usually challenging. We develop an efficient method for their computation and apply it to the study of dual superconductivity in 4d compact U(1) gauge theory.
description: 5 pages, 6 figures. Final revised version published in PRD
Improving anaerobic digestion of various sludge types through alkaline pretreatment
Creators: name: Watcharapol Wonglertarak
name: Boonchai Wichitsathian
name: Phongthon Saengchut
name: Borano Te
Publisher: name: Faculty of Engineering, Khon Kaen University
Year: 2024
Subjects: Waste Activated Sludge (WAS)
NaOH pretreatment
Solubilization
Anaerobic sludge digestion
Biogas productivity

description: Engineering and Applied Science Research, 51, 5, 673-679
Four-loop pressure of massless O(N) scalar field theory
Creators: name: Gynther, A.
name: Laine, M.
name: Schroder, Y.
name: Torrero, C.
name: Vuorinen, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Inspired by the corresponding problem in QCD, we determine the pressure of massless O(N) scalar field theory up to order g^6 in the weak-coupling expansion, where g^2 denotes the quartic coupling constant. This necessitates the computation of all 4-loop vacuum graphs at a finite temperature: by making use of methods developed by Arnold and Zhai at 3-loop level, we demonstrate that this task is manageable at least if one restricts to computing the logarithmic terms analytically, while handling the ``constant'' 4-loop contributions numerically. We also inspect the numerical convergence of the weak-coupling expansion after the inclusion of the new terms. Finally, we point out that while the present computation introduces strategies that should be helpful for the full 4-loop computation on the QCD-side, it also highlights the need to develop novel computational techniques, in order to be able to complete this formidable task in a systematic fashion.
description: 34 pages
A metric-based theory of test selection and coverage for communication protocols
Creators: name: Alilovic-Curgus, Jadranka
Publisher: name: University of British Columbia
Year: 2008

description: A metric-based theory is developed that gives a solution to the problem of test selection and coverage evaluation for the control behaviour of network protocol implementations. The key idea is that a fast, completely automated process can uniformly cover the execution subspace of a network protocol control behaviour when characterized by appropriate metric functions, each concerned with some aspect of the protocol behaviour. Efficient systematic approximation of complex systems behaviours is a crucial problem in software testing. This thesis gives a theoretically sound and completely automated solution to the approximation problem for the control behaviour space of network protocols generated by many concurrent and highly recursive network connections. This objective is accomplished in a series of steps. First, a metric-based theory is developed which introduces a rigorous mathematical treatment of the discipline of testing, through the definition of testing distance, test coverage metrics, and metric-based test selection method. It involves a metric characterization of infinite trace sets of protocol behaviour within complete and totally bounded metric spaces, and captures approximations of different patterns of system behaviour due to recursion and parallelism. It is shown that classes of fault coverages of well known protocol test methods form a metric hierarchy within these metric spaces. Next, a general mathematical framework is developed for reasoning about the interoperability of communicating systems. An interoperability relation is obtained which gives a theoretical upper bound for the test selection process. The two threads are drawn together in a specific test selection algorithm, showing that the generation of arbitrarily dense sets of test sequences that approximate some original test suite to some target accuracy within the theoretical upper bound, is a convergent process. Finally, the theory itself is tested on the examples of a multi-media network protocol. It is shown that very high densities of selected sets and coverage calculation can be achieved within reasonable time limits in a completely automated manner. These results indicate that there is no practical impediment to applying rigorous theoretical treatment to the discipline of testing for the case of systems that derive their complexity from highly concurrent and recursive subprocesses.
Dynamics of 8CB confined into porous silicon probed by incoherent neutron backscattering experiments
Creators: name: Guégan, Régis
name: Lefort, Ronan
name: Béziel, Wilfried
name: Morineau, Denis
name: Guendouz, Mohammed
name: Frick, Bernhard
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Confinement in the nanochannels of porous silicon strongly affects the phase behavior of the archetype liquid-crystal 4-n-octyl-4-cyanobiphenyl (8CB). A very striking phenom- enon is the development of a short-range smectic order, which occurs on a very broad temperature range. It suggests in this case that quenched disorder effects add to usual finite size and surface interaction effects. We have monitored the temperature variation of the molecular dynamics of the confined fluid by incoherent quasielastic neutron scat- tering. A strongly reduced mobility is observed at the highest temperatures in the liquid phase, which suggests that the interfacial molecular dynamics is strongly hindered. A continuously increasing slowdown appears on cooling together with a progressive growth of the static correlation length
title: Volunteer tourism : a path to buen vivir?
Creators: name: Owen, Steven
Publisher: name: University of St Andrews
Year: 2019

description: The popularity of volunteer tourism stems from its discursive positioning as fostering mutually beneficial relations between volunteer tourists and the host destination. Despite extensive scholarly work, the outcomes of this activity for host communities and volunteer tourists are still unclear. This study examines how volunteer tourism is interpreted across a range of stakeholders in two indigenous communities in Ecuador - one Kichwa community in the town of Chilcapamba and one Tsa'chila community near the town of Santa Domingo. Employing qualitative research methods of interviews, focus groups, participant observation, document analysis and diary analysis, this study makes multiple contributions to existing literatures. Through the inclusion of host community members, it provides new insights into a tourist practice, predominantly understood from the perspective of volunteer tourists from the Global North. Moreover, it provides an alternative reading of volunteer tourism by framing this activity through a worldview and political discourse originating from the Global South - Buen Vivir or 'good living'. The study argues that volunteer tourism functions through and reinforces the structures and imaginaries of an unequal and uneven global economic system. Chapter Four contextualises the study, deducing that despite using the discourses of Buen Vivir the Ecuadorian state employs practices typical of the neoliberal agenda. Chapter Five illustrates how host community members adopt and negotiate knowledge and practices from the Global North, to satisfy the demands of the volunteer tourism industry. Following this, Chapter Six argues that marginalised community members mobilise the discourses of Buen Vivir, to challenge neoliberal practices, which perpetuate existing inequalities in the communities. Finally, Chapter Seven proposes that volunteer tourists demonstrate a neoliberal subjectivity in how they manage and narrate their experience in the host communities. The study concludes that volunteer tourism embodies the spirit of neoliberal development models, whilst Buen Vivir provides a critical avenue for unsettling this agenda, by providing a framework through which alternative possibilities can be imagined.
Corrections to the ns-levels of hydrogen atom in deformed space with minimal length
Creators: name: Stetsko, M. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigated the hydrogen atom problem with deformed Heisenberg algebra leading to the existence of minimal length. Using modified perturbation theory developed in our previous work [M. M. Stetsko and V. M. Tkachuk, Phys. Rev. A 74, 012101 (2006)] we calculated the corrections to the arbitrary s-levels for hydrogen atom. We received a simple relation for the estimation of minimal length. We also compared the estimation of minimal length obtained here with the results obtained in the preceding investigations.
description: 9 pages, 1 figure
Ο θεσμός της προσωρινής κράτησης και η άμυνα του κατηγορουμενου
Creators: name: Ιορδανίδου, Κυριακή Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Προσωρινή κράτηση
Κατηγορούμενος
Άμυνα
Detention
Defendant
Defence

description: Η Ελληνική Πολιτεία απέτυχε να αναμορφώσει το θεσμό της προσωρινής κράτησης και να εξαλείψει την καταχρηστική εφαρμογή της στην πράξη. Τεκμήρια αυτής της άποψης αποτελούν αφ’ ενός ο όγκος των οικείων νομοθετικών τροποποιήσεων (13 τα τελευταία 28 χρόνια) και αφ’ ετέρου το ανεπαρκές περιεχόμενο τους.Ειδικότερα, το περιεχόμενο κρίνεται ανεπαρκές καθώς περιορίζεται είτε στην επανάληψη διατάξεων (άρθρο 139 ΚΠΔ που επαναλαμβάνει την υποχρέωση για ειδική και εμπεριστατωμένη αιτολογία των δικαστικών κρίσεων που αξιώνει το άρθρο 93 παρ.3 Συντ.), είτε στην υπόμνηση της σχέσης επικουρικότητας που συνδέει τα περιοριστικά μέτρα με την προσωρινή κράτηση (ν 3811/2009).Ο μόνος τρόπος εξάλειψης της κατάχρησης της είναι η ουσιαστικοποίηση του ελέγχου των σχετικών δικονομικών πράξεων, με την πρόβλεψη της απόλυτης ακυρότητας των σχετικών ανακριτικών διατάξεων και την έκδοση εκτελεστικού νόμου που θα ορίζει τις συνέπειες της παραβίασης της υποχρέωσης για ειδική και εμπεριστατωμένη αιτιολογία των δικαστικών κρίσεων
description: The Greek state has failed to reform the institution of detention and to eliminate its abuse in practice.This is proven, on the one hand,from the numerous legislative amendments (13 over the last 28 years) and, on the other hand,from the inefficiency of their content.In particular, the content is inadequate because it’s either restricted to the repetition of constitutional provisions (Article 139 of the Criminal Procedurerequires a specific and detailed justification of the judicial crises just likethe Article 93 paragraph 3 of the Constitution), or to remind the subsidiarity relationship linking the restrictive measures with detention (law 3811/2009). The only way to eliminate the abuse of detention is to substantiate the control of the relevant procedural acts, by adopting an implementing law that will define the consequences of the violation of the obligation for a specific and detailed justification of judicial crises
Detection of Functional Communities in Networks of Randomly Coupled Oscillators Using the Dynamic-Mode Decomposition
Creators: name: Curtis, Christopher W.
name: Porter, Mason A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Social and Information Networks (cs.SI)
subject: Dynamical Systems (math.DS)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Dynamic-mode decomposition (DMD) is a versatile framework for model-free analysis of time series that are generated by dynamical systems. We develop a DMD-based algorithm to investigate the formation of "functional communities" in networks of coupled, heterogeneous Kuramoto oscillators. In these functional communities, the oscillators in the network have similar dynamics. We consider two common random-graph models (Watts--Strogatz networks and Barabási--Albert networks) with different amounts of heterogeneities among the oscillators. In our computations, we find that membership in a community reflects the extent to which there is establishment and sustainment of locking between oscillators. We construct forest graphs that illustrate the complex ways in which the heterogeneous oscillators associate and disassociate with each other.
Review of alpha_s Measurements
Creators: name: Kluth, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a review of measurements of alpha_S. The individual measurements are discussed and intermediate averages for classes of related measurements are found. The final average is built using the intermediate values. Correlations are treated consistently. The ICHEP 2006 world average is alpha_S(M_Z) = 0.1175 +/- 0.0011 dominated by the recent result from lattice QCD.
description: 4 pages, 1 figure, 1 table, contribution to ICHEP 2006 (Moscow) proceedings
Minimal Modification To The Tri-bimaximal Neutrino Mixing
Creators: name: He, Xiao-Gang
name: Zee, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Current experimental data on neutrino oscillations are consistent with the tri-bimaximal mixing. If future experimental data will determine a non-zero $V_{e3}$ and/or find CP violations in neutrino oscillations, there is the need to modify the mixing pattern. We find that a simple neutrino mass matrix, resulting from $A_4$ family symmetry breaking with residual $Z_3$ and $Z_2$ discrete symmetries respectively for the Higgs sectors generating the charged lepton and neutrino mass matrices, can satisfy the required modifications. The neutrino mass matrix is minimally modified with just one additional complex parameter compared with the one producing the tri-bimaximal mixing. In this case, the CP violating Jarlskog factor $J$ has a simple form ($|J|=|V_{e1}V_{e3}|/2\sqrt{3}$ for real neutrino mass matrix), and also $V_{μi} = 1/\sqrt{3}$. We also discuss how this mixing matrix can be tested experimentally.
description: Latex 11 pages with no figures. References added
Η θέαση ως δράση: το πολιτικό στο μεταδραματικό θέατρο
Creators: name: Σουλτάνης, Κωνσταντίνος Αγγελου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: θέαση
μεταδραματικό θέατρο
πολιτικό
spectatorship
postdramatic theatre
political

description: Η παρούσα εργασία επιχειρεί να εντοπίσει την έννοια του πολιτικού στο μεταδραματικό θέατρο, εστιάζοντας στον «ρόλο» των θεατών. Κεντρικό επιχείρημα της μελέτης είναι πως το μεταδραματικό θέατρο, εκφεύγοντας της ακτινοβολίας του κειμενικού λόγου και δίνοντας έμφαση στη σχέση που δημιουργείται μεταξύ θεατών και ηθοποιών μιας παράστασης, προτείνει έναν νέο τρόπο θεώρησης του πολιτικού. Σε αντίθεση με το δραματικό θέατρο, του οποίου η πολιτική διάσταση περιοριζόταν στην αναζήτηση νέων τρόπων συνύπαρξης εντός ενός υπόρρητα δεδομένου και αδιαπραγμάτευτου κόσμου, το πολιτικό στο μεταδραματικό θέατρο προβάλλει τη δυνατότητα δημιουργίας νέων κόσμων, δηλαδή νέων τρόπων αισθητικής αντίληψης. Στο πλαίσιο αυτό, το πολιτικό εμφανίζεται ως η επί σκηνής αναπαράσταση της αδυναμίας κάθε λόγου να ηγεμονεύσει μόνιμα στο πεδίο που σχηματίζεται μεταξύ ηθοποιών και θεατών: όλες οι εδραιωμένες αντιλήψεις -θεατρικές και μη- τίθενται υπό αμφισβήτηση και όλα τα ενδεχόμενα φαίνονται ανοιχτά. Με τον τρόπο αυτό, η θέαση μιας παράστασης μπορεί να αποτελέσει μια μορφή αισθητικο-πολιτικής «δράσης» που παρεμβαίνει στις κοινωνικές σχέσεις στην κατεύθυνση της αναδιαμόρφωσής τους
description: The present thesis attempts to detect the notion of the political in terms of the postdramatic theatre, focusing on the spectators' "role". The main argument of the study is that the postdramatic theatre initiates a new way to perceive the political, keeping distance from the dramatic text and emphasizing on the relation created between the spectators and the actors. In contrast to the dramatic theatre, the political dimension of which was constrained only in the context of searching new ways of co-existence in an nonnegotiable world, the political in terms of postdramatic theatre reflects the potential of creating new worlds, that is new means of aesthetic perception. In this frame, the political emerges on stage as the representation of the inability of any discourse to hegemonize permanently on the relation formed between actors and spectators; all the established perceptions -theatrical or not- are doubted and different approaches are considered. In this way, spectatorship can be a form of aesthetic-political "action" which intervenes with social relations leading to their alteration
Correlation analysis of node and edge centrality measures in artificial complex networks
Creators: name: Ficara, Annamaria
name: Fiumara, Giacomo
name: De Meo, Pasquale
name: Liotta, Antonio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: The importance of a node in a social network is identified through a set of measures called centrality. Degree centrality, closeness centrality, betweenness centrality and clustering coefficient are the most frequently used metrics to compute node centrality. Their computational complexity in some cases makes unfeasible, when not practically impossible, their computations. For this reason we focused on two alternative measures, WERW-Kpath and Game of Thieves, which are at the same time highly descriptive and computationally affordable. Our experiments show that a strong correlation exists between WERW-Kpath and Game of Thieves and the classical centrality measures. This may suggest the possibility of using them as useful and more economic replacements of the classical centrality measures.
A Kiefer--Wolfowitz comparison theorem for Wicksell's problem
Creators: name: Wang, Xiao
name: Woodroofe, Michael
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62G05, 62G08, 62G20 (Primary)

description: We extend the isotonic analysis for Wicksell's problem to estimate a regression function, which is motivated by the problem of estimating dark matter distribution in astronomy. The main result is a version of the Kiefer--Wolfowitz theorem comparing the empirical distribution to its least concave majorant, but with a convergence rate $n^{-1}\log n$ faster than $n^{-2/3}\log n$. The main result is useful in obtaining asymptotic distributions for estimators, such as isotonic and smooth estimators.
description: Published in at http://dx.doi.org/10.1214/009053606000001604 the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Η επίδραση της αφήγησης και της χρήσης της εικόνας στη διδασκαλία της Αγγλικής ως ξένης γλώσσας σε παιδιά προσφυγικής καταγωγής
Creators: name: Παπαδοπούλου, Χάρις Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: παραμύθι
πολυτροπικότητα
πρόσφυγες
storytelling
multimodality
refugees

description: Στην παρούσα εργασία επιχειρείται η διερεύνηση του τρόπου με τον οποίο επηρεάζει ο συνδυασμός της προσωποποιημένης αφήγησης -μιας αφήγησης δηλαδή με πρωταγωνιστές τα ίδια τα παιδιά- και της πολυτροπικής και παιγνιώδους χρήσης της εικόνας, την γλωσσική διδασκαλία των Αγγλικών σε μαθητές προσφυγικής καταγωγής. Το πλαίσιο της διδακτικής προσέγγισης που εφαρμόστηκε στην παρούσα έρευνα υιοθετεί τις παιδαγωγικές αρχές της μη τυπικής εκπαίδευσης. Τα ερευνητικά δεδομένα συλλέχθηκαν μέσα από καταγραφές ημερολογίου της εκπαιδευτικού αλλά και από σχόλια της κριτικής της φίλης, αναφορικά με έντεκα εκπαιδευτικές παρεμβάσεις που διεξήχθησαν στο πλαίσιο της ενισχυτικής διδασκαλίας των Αγγλικών σε τρία προσφυγόπουλα, σε δημοτικό σχολείο της Δυτικής Θεσσαλονίκης. Επιπλέον πραγματοποιήθηκαν συνεντεύξεις με τα ίδια τα παιδιά, με την κριτική φίλη και με εκπαιδευτικούς του σχολείου. Το σύνολο των δεδομένων αναλύθηκε ποιοτικά υπό το πρίσμα της έρευνας δράσης και από τη διαδικασία αυτή προέκυψαν τρεις μεγάλες θεματικές κατηγορίες: η κατανόηση προφορικού λόγου, η παράγωγη προφορικού λόγου και η ενεργητική συμμετοχή των μαθητών. Γενικό συμπέρασμα της ανάλυσης αποτελεί ότι η πολυτροπική προσωποποιημένη αφήγηση επηρεάζει θετικά την διδασκαλία των Αγγλικών σε παιδιά προσφυγικής καταγωγής, άλλα και την ενεργητική συμμετοχή των παιδιών αυτών στην μαθησιακή διαδικασία
description: The present paper attempts to explore the ways in which the combination of a personalized narrative -the type of narrative that uses the students as protagonists of the plot- and the multimodal and playful use of image, impacts on the teaching of English to refugee children. Τhe context of the teaching approach used in the present study adopts the pedagogical principles of non-formal education. The research data were collected through the teacher’s/researcher’s diary entries and her critical friend’s comments on the eleven educational interventions conducted within the context of English Language Teaching in a Greek formal primary school classroom in Western Thessaloniki. In addition, interviews were conducted with the students themselves, with the researcher’s critical friend and with the children’s school teachers. All the data were analyzed qualitatively in the light of action research, and this process resulted in three major thematic categories: verbal language comprehension, verbal language production and active participation. The overall conclusion of the analysis is that the multimodal, personalized narrative positively influences the teaching of English to refugee children, but also the active involvement of these children in the learning process
Elicitation of inceptive verbs
Creators: name: Parker, Verdena
name: Campbell, Amy
name: Escamilla, Ramón
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: hup

description: Audio file VP-101107-09: Elicitation of verbs involving the inception of activities (setting out to do things, such as 'he went off hunting').
Chaos in Newtonian iterations: Searching for zeros which are not there
Creators: name: Skowronek, Lukasz
name: Gora, P. F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We show analytically that Newtonian iterations, when applied to a polynomial equation, have a positive topological entropy. In a specific example of an attempt to ``find'' the real solutions of the equation $x^2+1=0$, we show that the Newton method is chaotic. We analytically find the invariant density and show how this problem relates to that of a piecewise linear map.
Uncertainty-Based Semantics for Multi-Agent Knowing How Logics
Creators: name: Areces, Carlos
name: Fervari, Raul
name: Saravia, Andrés R.
name: Velázquez-Quesada, Fernando R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences
subject: F.4.1

description: We introduce a new semantics for a multi-agent epistemic operator of knowing how, based on an indistinguishability relation between plans. Our proposal is, arguably, closer to the standard presentation of knowing that modalities in classical epistemic logic. We study the relationship between this semantics and previous approaches, showing that our setting is general enough to capture them. We also define a sound and complete axiomatization, and investigate the computational complexity of its model checking and satisfiability problems.
description: In Proceedings TARK 2021, arXiv:2106.10886
TSTG I: Single-Particle and Many-Body Hamiltonians and Hidden Non-local Symmetries of Trilayer Moiré Systems with and without Displacement Field
Creators: name: Călugăru, Dumitru
name: Xie, Fang
name: Song, Zhi-Da
name: Lian, Biao
name: Regnault, Nicolas
name: Bernevig, B. Andrei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We derive the Hamiltonian for trilayer moiré systems with the Coulomb interaction projected onto the bands near the charge neutrality point. Motivated by the latest experimental results, we focus on the twisted symmetric trilayer graphene (TSTG) with a mirror-symmetry with respect to the middle layer. We provide a full symmetry analysis of the non-interacting Hamiltonian with a perpendicular displacement field coupling the band structure made otherwise of the twisted bilayer graphene (TBG) and the high velocity Dirac fermions, and we identify a hidden non-local symmetry of the problem. In the presence of this displacement field, we construct an approximate single-particle model, akin to the tripod model for TBG, capturing the essence of non-interacting TSTG. We also derive more quantitative perturbation schemes for the low-energy physics of TSTG with displacement field, obtaining the corresponding eigenstates. This allows us to obtain the Coulomb interaction Hamiltonian projected in the active band TSTG wavefunctions and derive the full many-body Hamiltonian of the system. We also provide an efficient parameterization of the interacting Hamiltonian. Finally, we show that the discrete symmetries at the single-particle level promote the $\mathrm{U} \left( 2 \right) \times \mathrm{U} \left( 2 \right)$ spin-valley symmetry to enlarged symmetry groups of the interacting problem under different limits. The interacting part of the Hamiltonian exhibits a large $\mathrm{U} \left( 4 \right) \times \mathrm{U} \left( 4 \right) \times \mathrm{U} \left( 4 \right) \times \mathrm{U} \left( 4 \right)$ symmetry in the chiral limit. Moreover, by identifying a new symmetry which we dub spatial many-body charge conjugation, we show that the physics of TSTG is symmetric around charge neutrality.
description: 18+43 pages, 2+7 figures
Local Tunneling Study of Three-Dimensional Order Parameter in the $π$-band of Al-doped MgB$_2$ Single Crystals
Creators: name: Giubileo, F.
name: Bobba, F.
name: Scarfato, A.
name: Cucolo, A. M.
name: Kohen, A.
name: Roditchev, D.
name: Zhigadlo, N.
name: Karpinski, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We have performed local tunneling spectroscopy on high quality Mg$_{1-x}$Al$_x$B$_2$ single crystals by means of Variable Temperature Scanning Tunneling Spectroscopy (STS) in magnetic field up to 3 Tesla. Single gap conductance spectra due to c-axis tunneling were extensively measured, probing different amplitudes of the three-dimensional $Δ_π$ as a function of Al content. Temperature and magnetic field dependences of the conductance spectra were studied in S-I-N configuration: the effect of the doping resulted in a monotonous reduction of the locally measured $T_C$ down to 24K for x=0.2. On the other hand, we have found that the gap amplitude shows a maximum value $Δ_π= 2.3$ meV for x=0.1, while the $Δ_π/ T_C$ ratio increases monotonously with doping. The locally measured upper critical field was found to be strongly related to the gap amplitude, showing the maximum value $H_{c2}\simeq3T$ for x=0.1 substituted samples. For this Al concentration the data revealed some spatial inhomogeneity in the distribution of $Δ_π$ on nanometer scale.
description: 4 pages, 3 figures
Η χρήση της εξωσωματικής κυκλοφορίας στις παιδοκαρδιοχειρουργικές επεμβάσεις
Creators: name: Τζιτζίδης, Χαράλαμπος Σταύρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Καρδιοχειρουργική
Παιδιατρική
Εξωσωματική κυκλοφορία
cardiothoracic surgery
pediatric
extracorporeal circulation

description: Υπάρχουν αρκετές διαφορές στη χρήση της εξωσωματικής κυκλοφορίας ανάμεσα στους ενήλικες και στους παιδιατρικούς ασθενείς. Σε γενικές γραμμές, οι βασικές αρχές της εξωσωματικής παραμένουν ίδιες και με πολλές ομοιότητες ανάμεσα στις δύο ομάδες (επιμέρους τμήματα κυκλώματος, χρήση ηπαρίνης, καρδιοπληγία). Παρ’ όλ’ αυτά, υπάρχουν σημαντικές αλλαγές κατά την κυκλοφοριακή υποστήριξη των παιδιών κυρίος στη διαχείριση διαφόρων παραμέτρων από τον τεχνικό (perfusionist). Ειδικότερα, τα παιδιατρικά κυκλώματα αποτελούνται από μικρότερους σωλήνες, κάνουλες, οξυγονωτές και ρεζερβουάρ. Όλα τα παραπάνω αποσκοπούν στη μείωση της αιμοαρραίωσης. Επίσης, εμφανίζονται διαφοροποιήσεις στη διαχείριση των αερίων του αίματος κυρίως στην υποθερμία, στις ροές της αντλίας, στις κάνουλες, στη φλεβική επιστροφή και στη διαχείριση του όγκου. Τέλος, είναι υψίστης σημασίας η εφαρμογή κριτικής σκέψης από τον τεχνικό, ο οποίος ζυγίζει διάφορες παραμέτρους και αποφασίζει την καλύτερη στρατηγική για τον κάθε παιδιατρικό ασθενή
description: There are several differences regarding the usage of extracorporeal circulation between adult and pediatric patients. In general, the basic principles of the application of extracorporeal circulation remain the same regarding both of these groups (components of the circuit, heparin usage, cardioplegia Nevertheless, there are important differences when applying circulatory support in children, regarding the management of different parameters from the perfusionist. In more depth pediatric circuits consist of smaller tubes, cannulas, oxygenators and reservoirs. All of the above have the positive effect of reducing hemodilution. In pediatric patients there is also differentiation regarding the management of blood gases especially during hypothermia. Furthermore there are differences about the pump flows, the cannulas, the venus return and total volume of prime. Lastly, the most important aspect that has to be mentioned is that the technician who has to consider all the aspects of the surgical procedure and the condition of the pediatric patient in order to choose the best approach for each case
Solvable intermittent shell model of turbulence
Creators: name: Mailybaev, Alexei A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We introduce a shell model of turbulence featuring intermittent behaviour with anomalous power-law scaling of structure functions. This model is solved analytically with the explicit derivation of anomalous exponents. The solution associates the intermittency with the hidden symmetry for Kolmogorov multipliers, making our approach relevant for real turbulence.
description: 12 pages, 2 figures
Μουσειολογικός Νοηματικός Σχεδιασμός Έκθεσης αναφορικά με την επιρροή του Φρίντριχ Νίτσε στη Μεταφυσική Ζωγραφική του Τζόρτζιο ντε Κίρικο
Creators: name: Μαύρου, Ελισάβετ Παντελή
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Τζόρτζιο ντε Κίρικο
Φρίντριχ Νίτσε
Μεταφυσική Ζωγραφική
Giorgio de Chirico
Friedrich Nietzsche
Metaphysical Painting

description: Θεματικός πυρήνας της διπλωματικής διατριβής καθίσταται η επιρροή της φιλοσοφίας του Φρίντριχ Νίτσε στην Μεταφυσική Ζωγραφική του Τζόρτζιο ντε Κίρικο. Ως εκ τούτου, η εν λόγω εργασία χωρίζεται σε δύο μέρη, όπου το πρώτο μέρος αφορά την θεωρητική πλαισίωση της επιρροής αυτής, ενώ το δεύτερο επικεντρώνεται στον Μουσειολογικό Νοηματικό Σχεδιασμό μιας περιοδικής μουσειακής έκθεσης αναφορικά με την πνευματική αυτή συνάντηση. Κεντρική νοηματική ιδέα της έκθεσης αυτής, η οποία τιτλοφορείται ως «Προς την αναζήτηση του φωτός – Ένα ταξίδι μέσα από τα έργα του ντε Κίρικο», είναι το ταξίδι και οι αμφιταλαντεύσεις της ύπαρξης μέσα από τις επιρροές που άσκησε ο Νίτσε στην ζωγραφική του Τζόρτζιο ντε Κίρικο και η εν τέλει συνειδητοποίηση, ότι η πορεία της ζωής δεν είναι παρά μια διαρκή αναζήτηση του φωτός. Παράλληλα, το Μουσειολογικό Σκεπτικό της έκθεσης καλύπτει ως επί το πλείστον το ταξίδι του νιτσεϊκού Ζαρατούστρα προς την κατάκτηση του υπεράνθρωπου. Συμπερασματικά, βασική επιδίωξη της διατριβής αυτής είναι η σύζευξη της φιλοσοφίας και της τέχνης, καθώς και η έμμεση ίσως αναφορά στο σήμερα σχετικά με την παροντική κατάσταση του ανθρώπου και την μετέπειτα εξέλιξη του
description: The aim of this dissertation is to examine the way that Friedrich Nietzsche exerts influence on Giorgio de Chirico’s Metaphysical Painting. As so, this essay can be separated in two parts. The first part examines the notional framing of this philosophical impact on painting. The main course of the second part is a museological conceptual planning about this mental meeting. Basic conceptual idea of this periodical exhibition, which is entitled as “In the search of the sun – A mental journey through de Chirico’s art”, is the journey and the vacillation of human existence, through Nietzsche’s philosophical impact on Giorgio de Chirico’s Metaphysical Art and the apprehension that life is nothing more than a continuous search for the sun. Furthermore, the museological thinking behind this idea is the journey of the nietzschean character Zarathustra, whose final purpose is to possess the inner strength of the superior being, superman. In conclusion, the main purpose of this essay is the correlation between philosophy and art and the implicit reference to the human being of the present and its mental evolution in the upcoming years
description: Σε συνεργασία με Παιδαγωγικό Δημοτικής Εκπαίδευσης (Πανεπιστήμιο Δυτικής Μακεδονίας)
Variable selection in semiparametric regression modeling
Creators: name: Li, Runze
name: Liang, Hua
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62G08, 62G10 (Primary) 62G20 (Secondary)

description: In this paper, we are concerned with how to select significant variables in semiparametric modeling. Variable selection for semiparametric regression models consists of two components: model selection for nonparametric components and selection of significant variables for the parametric portion. Thus, semiparametric variable selection is much more challenging than parametric variable selection (e.g., linear and generalized linear models) because traditional variable selection procedures including stepwise regression and the best subset selection now require separate model selection for the nonparametric components for each submodel. This leads to a very heavy computational burden. In this paper, we propose a class of variable selection procedures for semiparametric regression models using nonconcave penalized likelihood. We establish the rate of convergence of the resulting estimate. With proper choices of penalty functions and regularization parameters, we show the asymptotic normality of the resulting estimate and further demonstrate that the proposed procedures perform as well as an oracle procedure. A semiparametric generalized likelihood ratio test is proposed to select significant variables in the nonparametric component. We investigate the asymptotic behavior of the proposed test and demonstrate that its limiting null distribution follows a chi-square distribution which is independent of the nuisance parameters. Extensive Monte Carlo simulation studies are conducted to examine the finite sample performance of the proposed variable selection procedures.
description: Published in at http://dx.doi.org/10.1214/009053607000000604 the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Transcription of "Panther and Bobcat"
Creators: name: Parker, Verdena
name: Escamilla, Ramón
name: Newbold, Lindsey
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: hup

description: Audio files VP-101107-05 and VP-101107-06: Transcription of the story of Panther and Bobcat, file VP-200107-01, starting at 1:19.
Predictive power for superheavy nuclear mass and possible stability beyond the neutron drip line in deformed relativistic Hartree-Bogoliubov theory in continuum
Creators: name: Zhang, Kaiyuan
name: He, Xiaotao
name: Meng, Jie
name: Pan, Cong
name: Shen, Caiwan
name: Wang, Chen
name: Zhang, Shuangquan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The predictive power of the deformed relativistic Hartree-Bogoliubov theory in continuum (DRHBc) for nuclear mass is examined in the superheavy region, $102 \le Z \le 120$. The accuracy of predicting the 10 (56) measured (measured and empirical) masses is $0.635$ ($0.642$) MeV, in comparison with $0.515$ ($1.360$) MeV by WS4 and $0.910$ ($2.831$) MeV by FRDM. Possible stability against multineutron emission beyond the two-neutron drip line is explored by the DRHBc theory, which takes into account simultaneously the deformation effects, the pairing correlations, and the continuum effects. Nuclei stable against two- and multineutron emissions beyond the two-neutron drip line are predicted in $_{106}$Sg, $_{108}$Hs, $_{110}$Ds, and $_{112}$Cn isotopic chains, forming a peninsula of stability adjacent to the nuclear mainland. This stability is mainly due to the deformation which significantly affects the shell structure around the Fermi surface. The pairing correlations and continuum influence the stability peninsula in a self-consistent way.
description: 13 pages, 5 figures, minor updates according to the published version
Packets in Grothendieck's Section Conjecture
Creators: name: Esnault, Hélène
name: Hai, Phùng Hô
Publisher: name: arXiv
Year: 2007
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: Using the identification of sections of the Galois group of the ground field into the arithmetic fundamental group with neutral fiber functors of the category of finite connections, we define the "packets" in Grothendieck's section conjecture and show their properties predicted by him.
description: 22 pages (no changes on the mathematical content but the exposition has been shortened)
Revisiting Epistemic Logic with Names
Creators: name: Bílková, Marta
name: Christoff, Zoé
name: Roy, Olivier
Publisher: name: arXiv
Year: 2021
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: This paper revisits the multi-agent epistemic logic presented in [10], where agents and sets of agents are replaced by abstract, intensional "names". We make three contributions. First, we study its model theory, providing adequate notions of bisimulation and frame morphisms, and use them to study the logic's expressive power and definability. Second, we show that the logic has a natural neighborhood semantics, which in turn allows to show that the axiomatization in [10] does not rely on possibly controversial introspective properties of knowledge. Finally, we extend the logic with common and distributed knowledge operators, and provide a sound and complete axiomatization for each of these extensions. These results together put the original epistemic logic with names in a more modern context and opens the door for a logical analysis of epistemic phenomena where group membership is uncertain or variable.
description: In Proceedings TARK 2021, arXiv:2106.10886
Οι αναδιατυπώσεις έργων-σταθμών του Μοντερνισμού στην εικονογραφία του Μεταμοντερνισμού
Creators: name: Αχεριώτη, Ελλάδα Χρίστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Μοντερνισμός
Μεταμοντερνισμός
Τέχνη
Modernism
Post-modernism
Art

description: Η παρούσα εργασία έχει ως στόχο της κατ’ αρχήν να παρουσιάσει και έπειτα να ερμηνεύσει το φαινόμενο αναδιατύπωσης έργων-σταθμών του Μοντερνισμού στην εικονογραφία του Μεταμοντερνισμού. Αφορμή επιλογής του συγκεκριμένου θέματος στάθηκε η διαπίστωση πως η παρακαταθήκη της μοντέρνας τέχνης στοιχειώνει ένα πολύ μεγάλο μέρος των μεταμοντέρνων καλλιτεχνών που δραστηριοποιούνται στο πεδίο τόσο των εικαστικών όσο και των εφαρμοσμένων τεχνών. Έτσι, στην εργασία αυτή, αφού γίνουν ορισμένες διευκρινίσεις σχετικά με τους όρους που χρησιμοποιούνται, δείχνονται και σχολιάζονται όσο το δυνατόν περισσότερες εικόνες έργων που στηρίζονται σε σημαντικούς πίνακες του Μοντερνισμού. Οι ερμηνευτικές προσεγγίσεις που επιχειρούνται έχουν σκοπό να αιτιολογήσουν αυτού του είδους την επιστροφή σε πηγές του παρελθόντος και να παράσχουν μερικά στοιχεία-κλειδιά που θα διευκολύνουν ή θα εμπλουτίσουν τις δυνατές αναγνώσεις των έργων που εντάσσονται σε αυτό το πλαίσιο
description: The aim of the present thesis is to present and then to interpret the phenomenon of recasting emblematic works of art of Modernism in the imagery of Post-modernism. The choice of this topic was the realization that the visual stock of Modernism haunts a large part of the postmodern artists who are active in the field of both visual and applied arts. Thus, in this thesis, after clarifying the terms used, I show and I comment as many as possible images of works based on important modernist works of art. Then, I attempt various interpretative approaches aiming to justify this kind of return to sources of the past and to provide some key elements that will facilitate or even enrich the possible readings of the works of art inscribed in this framework