cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Provably Safe Control of Lagrangian Systems in Obstacle-Scattered Environments
Creators: name: Barbosa, Fernando S.
name: Lindemann, Lars
name: Dimarogonas, Dimos V.
name: Tumova, Jana
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: Robotics (cs.RO)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We propose a hybrid feedback control law that guarantees both safety and asymptotic stability for a class of Lagrangian systems in environments with obstacles. Rather than performing trajectory planning and implementing a trajectory-tracking feedback control law, our approach requires a sequence of locations in the environment (a path plan) and an abstraction of the obstacle-free space. The problem of following a path plan is then interpreted as a sequence of reach-avoid problems: the system is required to consecutively reach each location of the path plan while staying within safe regions. Obstacle-free ellipsoids are used as a way of defining such safe regions, each of which encloses two consecutive locations. Feasible Control Barrier Functions (CBFs) are created directly from geometric constraints, the ellipsoids, ensuring forward-invariance, and therefore safety. Reachability to each location is guaranteed by asymptotically stabilizing Control Lyapunov Functions (CLFs). Both CBFs and CLFs are then encoded into quadratic programs (QPs) without the need of relaxation variables. Furthermore, we also propose a switching mechanism that guarantees the control law is correct and well-defined even when transitioning between QPs. Simulations show the effectiveness of the proposed approach in two complex scenarios.
description: 8 pages, 4 figures, to be published in CDC 2020
A unified picture for gamma-ray burst prompt and X-ray afterglow emissions
Creators: name: Kumar, P.
name: McMahon, E.
name: Barthelmy, S. D.
name: Burrows, D.
name: Gehrels, N.
name: Goad, M.
name: Nousek, J.
name: Tagliaferri, G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Data from the Swift satellite has enabled us for the first time to provide a complete picture of the gamma-ray burst emission mechanism and its relationship with the early afterglow emissions. We show that gamma-ray photons for two bursts, 050126 & 050219A, for which we have carried out detailed analysis were produced as a result of the synchrotron self-Compton process in the material ejected in the explosion when it was heated to a mildly relativistic temperature at a distance from the center of explosion of order the deceleration radius. Both of these bursts exhibit rapidly declining early X-ray afterglow lightcurves; this emission is from the same source that produced the gamma-ray burst. The technique we exploit to determine this is very general and makes no assumption about any particular model for gamma-ray generation except that the basic radiation mechanism is some combination of synchrotron and inverse-Compton processes in a relativistic outflow. For GRB 050219A we can rule out the possibility that energy from the explosion is carried outward by magnetic fields, and that the dissipation of this field produced the $γ$-ray burst.
description: 5 pages 3 figures. to appear in MNRAS letter
Uniqueness of non-trivial spherically symmetric black hole solution in special classes of F(R) gravitational theory
Creators: name: Nashed, G. G. L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show, in detail, that the only non-trivial black hole (BH) solutions for a neutral as well as a charged spherically symmetric space-times, using the class ${\textit F(R)}={\textit R}\pm{\textit F_1 (R)} $, must-have metric potentials in the form $h(r)=\frac{1}{2}-\frac{2M}{r}$ and $h(r)=\frac{1}{2}-\frac{2M}{r}+\frac{q^2}{r^2}$. These BHs have a non-trivial form of Ricci scalar, i.e., $R=\frac{1}{r^2}$ and the form of ${\textit F_1 (R)}=\mp\frac{\sqrt{\textit R}} {3M} $. We repeat the same procedure for (Anti-)de Sitter, (A)dS, space-time and got the metric potentials of neutral as well as charged in the form $h(r)=\frac{1}{2}-\frac{2M}{r}-\frac{2Λr^2} {3} $ and $h(r)=\frac{1}{2}-\frac{2M}{r}+\frac{q^2}{r^2}-\frac{2Λr^2} {3} $, respectively. The Ricci scalar of the (A)dS space-times has the form ${\textit R}=\frac{1+8r^2Λ}{r^2}$ and the form of ${\textit F_1(R)}=\mp\frac{\textit 2\sqrt{R-8Λ}}{3M}$. We calculate the thermodynamical quantities, Hawking temperature, entropy, quasi-local energy, and Gibbs-free energy for all the derived BHs, that behaves asymptotically as flat and (A)dS, and show that they give acceptable physical thermodynamical quantities consistent with the literature. Finally, we prove the validity of the first law of thermodynamics for those BHs.
description: 12 pages, 16 figures
The role enactment questionnaire : reliability and validity testing
Creators: name: Sleigh, Kenna Marie
Publisher: name: University of British Columbia
Year: 2009

description: In dual-earner research, there i s a dearth of psychometrically sound instruments that measure role quality. The author examined the reliability and validity of a new instrument, the Role Enactment Questionnaire (REQ). The REQ measures two role stressors: role intensity and role disparity, in the paid-work, spouse, parent, and individual roles. Reliability was assessed by calculating the REQ1s internal consistency and test-retest reliability. Construct validity was evaluated through confirmatory factor analysis (CFA) and hypothesis testing. The REQ was administered to 165 dual-earner parents with children six years or younger. The sample was very homogeneous with respect to age, education, and income levels. With the exception of two subscales that captured the intensity dimension in the paid-work and individual roles, Cronbach's alphas were high. Test-retest calculations indicated that the REQ was stable. Ten hypotheses were developed from demographic predictors of role intensity and role disparity. Seven of the hypotheses were confirmed by statistically significant results. CFA was somewhat supportive of construct validity but also demonstrated some lack of consistency in capturing the construct being measured by the instrument. Hypothesis testing identified the continuing influence of gender role norms on the dual-earner lifestyle, in this sample. A traditional division of labour dominated the allocation of domestic duties and work-role involvement. Nurses who work with dual-earner parents can use demographic predictors to identify individuals vulnerable to role stress as measured by role intensity and role disparity. Similarly, administrators and nurse educators can use these predictors to address issues affecting personnel and students, respectively. Although the study recommends some refinement of the REQ based on reliability and validity results, the instrument shows promise for use in the field of dual-earner research.
What if the urban car parks become the urban farms: a case study of daylight availability in Singapore
Creators: name: Chien, Szu-Cheng
name: Soh, Chew Beng
Publisher: name: Singapore Institute of Technology
Year: 2024

description: Singapore, facing land scarcity, launched the "30 by 30" initiative to produce 30% of its food locally by 2030. This study explores transforming urban car parks into farms for Nai Bai cultivation. We set up two experimental cells mimicking car park conditions with different façade openings. Using Rhino 7 and Climate Studio v1.9, we created models to study urban farming feasibility. Initial findings show potential for car park farming, but cells with limited openings may provide insufficient light. The study provides a basis for "farmscape" development in car parks, promoting food security in dense cities. Future work will refine models and extend to other crops and spaces.
Ο ρόλος των κινήτρων στο σχολείο κατά την Ορθόδοξη Χριστιανική Αγωγή:
Creators: name: Μιχαλά, Μαρία Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Κίνητρα
Παρακίνηση
Παρώθηση
Ενθάρρυνση
Διαπροσωπικές σχέσεις
Θρησκευτική αγωγή
Motive
inducement
Motivation
Encouragement
Interpersonal relations

description: Η εργασία αυτή έχει ως κεντρικό θέμα το ρόλο των κινήτρων στο σχολείο κατά την ορθόδοξη χριστιανική αγωγή. Ως γενικός σκοπός ορίζεται η παρουσίαση των κινήτρων μάθησης, καθώς και η ανάλυση των παρωθητικών παραγόντων που λειτουργούν ως επιπλέον κίνητρα στη μάθηση. Προκειμένου, ωστόσο, να καταδειχθεί η αναγκαιότητα των κινήτρων στο χώρο του σχολείου, παρουσιάζονται, επίσης, οι τρόποι διαμόρφωσής τους στην αγωγή γενικότερα και τη θρησκευτική αγωγή ειδικότερα.
description: The main theme of this essay is the role of motivation at school according to the christian orthodox education. The main purpose is the presentation of the learning incentives as well as the analysis of the aspects that serve as extra incentives in learning. Their formation during education in general and religious education in particular is also presented in order to show their necessity at school.
Dynamic State Analysis of a Driven Magnetic Pendulum using Ordinal Partition Networks and Topological Data Analysis
Creators: name: Myers, Audun
name: Khasawneh, Firas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The use of complex networks for time series analysis has recently shown to be useful as a tool for detecting dynamic state changes for a wide variety of applications. In this work, we implement the commonly used ordinal partition network to transform a time series into a network for detecting these state changes for the simple magnetic pendulum. The time series that we used are obtained experimentally from a base-excited magnetic pendulum apparatus, and numerically from the corresponding governing equations.The magnetic pendulum provides a relatively simple, non-linear example demonstrating transitions from periodic to chaotic motion with the variation of system parameters. For our method, we implement persistent homology, a shape measuring tool from Topological Data Analysis (TDA), to summarize the shape of the resulting ordinal partition networks as a tool for detecting state changes. We show that this network analysis tool provides a clear distinction between periodic and chaotic time series. Another contribution of this work is the successful application of the networks-TDA pipeline, for the first time, to signals from non-autonomous nonlinear systems. This opens the door for our approach to be used as an automatic design tool for studying the effect of design parameters on the resulting system response. Other uses of this approach include fault detection from sensor signals in a wide variety of engineering operations.
Η θρησκευτική αγωγή στο πλαίσιο της εκπαίδευσης στην Κρήτη κατά την περίοδο της Κρητικής Πολιτείας (1898-1913):
Creators: name: Μαλεφάκη, Δέσποινα Αλέξανδρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Ορθοδοξία
Οθωμανική κυριαρχία
Κρητικός λαός
Θρησκευτική αγωγή
Ανεξιθρησκεία
Πολυπολιτισμικότητα
Πολυθρησκευτικότητα
Orthodox
Turkish domination
cretian people
religious education
multicultural

description: Κεντρικό θέμα της εργασίας είναι η εκπαιδευτική δραστηριότητα της Κρητικής Πολιτείας από την πλευρά της θρησκευτικής αγωγής κατά την περίοδο 1898-1913. Μελετούνται οι ιστορικές, κοινωνικές, οικονομικές και πολιτικές συνθήκες στις οποίες αναπτύσσεται η εκπαίδευση στην Κρήτη. Πιο συγκεκριμένα παρουσιάζεται η οργάνωση, η πνευματική ζωή και η ορθόδοξη εκκλησιαστική εκπαίδευση καθώς και η εκπαίδευση των αλλοθρήσκων και ετεροδόξων πληθυσμών στην Κρήτη, που εκείνη την εποχή αποτελούσε πολυπολιτισμική κοιτίδα.
description: The main theme of this essay is the education in the Cretian State and especially the religious education in 1898-1913. Historical, social, financial and political circumstances are studied in Cretian education. Furthermore, it is presented the organization, the spiritual life and the Christian orthodox education as also the education of people who believe in other religions in Crete, a place that at this period was multicultural.
On extending actions of groups
Creators: name: Ageev, Sergei M.
name: Repovš, Dušan
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Topology (math.GN)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 54F11, 54H20, 58E60

description: Problems of dense and closed extension of actions of compact transformation groups are solved. The method developed in the paper is applied to problems of extension of equivariant maps and of construction of equivariant compactifications.
Quantum Noise Analysis of Spin Systems Realized with Cold Atoms
Creators: name: Cherng, R. W.
name: Demler, Eugene
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider the use of quantum noise to characterize many-body states of spin systems realized with ultracold atomic systems. These systems offer a wealth of experimental techniques for realizing strongly interacting many-body states in a regime with a large but not macroscropic number of atoms where fluctuations of an observable such as the magnetization are discernable compared to the mean value. The full distribution function is experimentally relevant and encodes high order correlation functions that may distinguish various many-body states. We apply quantum noise analysis to the Ising model in a transverse field and find a distinctive even versus odd splitting in the distribution function for the transverse magnetization that distinguishes between the ordered, critical, and disordered phases. We also discuss experimental issues relevant for applying quantum noise analysis for general spin systems and the specific results obtained for the Ising model.
description: 18 pages, 4 figures, updated acknowledgements
Coherent acoustic vibration of metal nanoshells
Creators: name: Guillon, C.
name: Langot, P.
name: Del Fatti, N.
name: Vallee, F.
name: Kirakosyan, A. S.
name: Shahbazyan, T. V.
name: Cardinal, T.
name: Treguer, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Using time-resolved pump-probe spectroscopy we have performed the first investigation of the vibrational modes of gold nanoshells. The fundamental isotropic mode launched by a femtosecond pump pulse manifests itself in a pronounced time-domain modulation of the differential transmission probed at the frequency of nanoshell surface plasmon resonance. The modulation amplitude is significantly stronger and the period is longer than in a gold nanoparticle of the same overall size, in agreement with theoretical calculations. This distinct acoustical signature of nanoshells provides a new and efficient method for identifying these versatile nanostructures and for studying their mechanical and structural properties.
description: 5 pages, 3 figures
Decentralization and local innovation : the role of British Columbia’s municipalities in affordable housing policy
Creators: name: Britton, Hayley S.
Publisher: name: University of British Columbia
Year: 2009

description: This thesis examines the changing role of British Columbia's municipal governments in affordable housing policy. In recent years, the federal government of Canada has withdrawn from active involvement in affordable housing provision, and has passed responsibility back to the provinces. The government of British Columbia has, in turn, amended its Municipal Act through Bills 20 (1992), 57 (1993) and 31 (1994), to grant municipal governments increased planning powers in the field of affordable housing. This thesis examines the responses of municipal governments to these changes and specifically investigates whether the decentralization of responsibility has to led to policy innovation. This research question is addressed in three ways. First, through a review of the theoretical literature and legislation, a discussion is presented concerning the issue of decentralization and the ways it has been enacted in the case of housing policy in British Columbia. Secondly, the results of a postal survey of 52 municipalities in British Columbia are presented, reflecting the range of local responses to the provincial housing legislation. Thirdly, case studies, derived from key informant interviews and document analysis in three municipalities (Burnaby, Sidney and Prince George) are presented. These provide more detailed illustrations of housing strategies in different geographical contexts. The research suggests that housing is a dynamic area of public policy in British Columbia, with a distinct pattern of innovation. In particular, some 'entrepreneurial' municipalities exhibited a shorter response time in reacting to the provincial legislation, and have adopted more innovative approaches to housing policy; these in turn, serve as examples to other jurisdictions. The wide range of innovative housing strategies adopted by local governments across the province, which are highlighted in this thesis, suggest that decentralization has ensured the potential for a greater fit between the preferences and needs of a particular locale. To the extent that it provides municipalities with the powers and resources they need, the decentralization policy allows communities to capitalize on their existing strengths and to more readily meet their housing needs.
Discovery of segmented Fermi surface induced by Cooper pair momentum
Creators: name: Zhu, Zhen
name: Papaj, Michał
name: Nie, Xiao-Ang
name: Xu, Hao-Ke
name: Gu, Yi-Sheng
name: Yang, Xu
name: Guan, Dandan
name: Wang, Shiyong
name: Li, Yaoyi
name: Liu, Canhua
name: Luo, Jianlin
name: Xu, Zhu-An
name: Zheng, Hao
name: Fu, Liang
name: Jia, Jin-Feng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Since the early days of Bardeen-Cooper-Schrieffer theory, it has been predicted that a sufficiently large supercurrent can close the energy gap in a superconductor and creates gapless Bogoliubov quasiparticles through the Doppler shift of quasiparticle energy due to the Cooper pair momentum. In this gapless superconducting state, zero-energy quasiparticles reside on a segment of the normal state Fermi surface, while its remaining part is still gapped. The finite density of states of field-induced quasiparticles, known as the Volovik effect, has been observed in tunneling and specific heat measurements on d- and s-wave superconductors. However, the segmented Fermi surface of a finite-momentum state carrying a supercurrent has never been detected directly. Here we use quasiparticle interference (QPI) technique to image field-controlled Fermi surface of Bi$_2$Te$_3$ thin films proximitized by the superconductor NbSe$_2$. By applying a small in-plane magnetic field, a screening supercurrent is induced which leads to finite-momentum pairing on topological surface states of Bi$_2$Te$_3$. Our measurements and analysis reveal the strong impact of finite Cooper pair momentum on the quasiparticle spectrum, and thus pave the way for STM study of pair density wave and FFLO states in unconventional superconductors.
description: 25 pages, 14 figures
On some free products of von Neumann algebras which are free Araki-Woods factors
Creators: name: Houdayer, Cyril
Publisher: name: arXiv
Year: 2006
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 46L10; 46L54

description: We prove that certain free products of factors of type ${\rm I}$ and other von Neumann algebras with respect to nontracial, almost periodic states are almost periodic free Araki-Woods factors. In particular, they have the free absorption property and Connes' Sd invariant completely classifies these free products. For example, for $λ, μ\in ]0, 1[$, we show that $$(M_2(\C), ω_λ) \ast (M_2(\C), ω_μ)$$ is isomorphic to the free Araki-Woods factor whose Sd invariant is the subgroup of $\R^*_+$ generated by $λ$ and $μ$. Our proofs are based on algebraic techniques and amalgamated free products. These results give some answers to questions of Dykema and Shlyakhtenko.
description: 14 pages
Information of Structures in Galaxy Distribution
Creators: name: Fang, Fan
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: We introduce an information-theoretic measure, the Renyi information, to describe the galaxy distribution in space. We discuss properties of the information measure, and demonstrate its relationship with the probability distribution function and multifractal descriptions. Using the First Look Survey galaxy samples observed by the Infrared Array Camera onboard Spitzer Space Telescope, we present measurements of the Renyi information, as well as the counts-in-cells distribution and multifractal properties of galaxies in mid-infrared wavelengths. Guided by multiplicative cascade simulation based on a binomial model, we verify our measurements, and discuss the spatial selection effects on measuring information of the spatial structures. We derive structure scan functions at scales where selection effects are small for the Spitzer samples. We discuss the results, and the potential of applying the Renyi information to measuring other spatial structures.
description: 25 pages, 8 figures, submitted to ApJ; To appear in The Astrophysical Journal 2006, 644, 678 (June 20th)
Counting Links in Complete Graphs
Creators: name: Fleming, Tom
name: Mellor, Blake
Publisher: name: arXiv
Year: 2006
Subjects: subject: Combinatorics (math.CO)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 05C10; 57M15

description: We find the minimal number of links in an embedding of any complete $k$-partite graph on 7 vertices (including $K_7$, which has at least 21 links). We give either exact values or upper and lower bounds for the minimal number of links for all complete $k$-partite graphs on 8 vertices. We also look at larger complete bipartite graphs, and state a conjecture relating minimal linking embeddings with minimal book embeddings.
description: 21 pages, several figures
Encoding Incremental NACs in Safe Graph Grammars using Complementation
Creators: name: Corradini, Andrea
name: Saadat, Maryam Ghaffari
name: Heckel, Reiko
Publisher: name: arXiv
Year: 2020
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences
subject: Parallelism and concurrency

description: In modelling complex systems with graph grammars (GGs), it is convenient to restrict the application of rules using attribute constraints and negative application conditions (NACs). However, having both attributes and NACs in GGs renders the behavioural analysis (e.g. unfolding) of such systems more complicated. We address this issue by an approach to encode NACs using a complementation technique. We consider the correctness of our encoding under the assumption that the grammar is safe and NACs are incremental, and outline how this result can be extended to unsafe, attributed grammars.
description: In Proceedings GCM 2020, arXiv:2012.01181
E0 emission in alpha + ^12C fusion at astrophysical energies
Creators: name: Baur, G.
name: Snover, K. A.
name: Typel, S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We show that E0 emission in alpha + ^12C fusion at astrophysically interesting energies is negligible compared to E1 and E2 emission.
description: submitted to Phys. Rev. C, Brief Reports
Η κατάλυση του φύλου στο έργο της Σάρα Κέιν:
Creators: name: Λυκουργιώτη, Ασπασία Αλέξη
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Σάρα Κέιν
Τζούντιθ Μπάτλερ
Φεμινισμός
Sarah Kane
Judith Butler
Feminism

description: Στο πλαίσιο αυτής της εργασίας θα αποπειραθώ να αντιπαραβάλλω το έργο της Σάρα Κέιν με τη φεμινιστική και κουήρ θεωρία. Θα προσπαθήσω δηλαδή να εντοπίσω τη σύγκληση αλλά και την πιθανή απόκλιση των έργων της από τα αιτήματα και τις φιλοσοφικές παραδοχές της δεύτερης και της τρίτης φάσης του φεμινισμού. Πριν περάσω όμως σε μια φεμινιστική και κουήρ προσέγγιση των έργων - στο τρίτο κεφάλαιο της εργασίας, στο πρώτο και στο δεύτερο κεφάλαιο θα παραθέσω μεμονωμένα τα αιτήματα και τις φιλοσοφικές παραδοχές του φεμινισμού. Στο πρώτο κεφάλαιο θα ασχοληθώ με την πρώτη και τη δεύτερη φάση του φεμινισμού, όπως αυτές διαμορφώνονται ιστορικά και επηρεάζουν τη γυναικεία θεατρική δημιουργία, ενώ στο δεύτερο κεφάλαιο θα εστιάσω στην τρίτη φάση του φεμινισμού και στις νέες έννοιες της θεωρίας του κουήρ που καθιερώνονται την ίδια περίπου περίοδο με αυτή που γράφονται τα έργα της Κέιν. Τα σημαντικά σημεία που στοχεύω να υπογραμμίσω σε αυτή την εργασία και προκύπτουν από την αντιπαραβολή του φεμινισμού και της θεωρίας του Κουήρ με το έργο της Κέιν είναι δύο. Το πρώτο σημείο είναι η αντιθετική συνύπαρξη στο έργο της του χριστιανικού προτύπου της ανιδιοτελούς γυναίκας, με τα επιθετικά στην πατριαρχική εξουσία αιτήματα χειραφέτησής της, που θέτει ο υλιστικός φεμινισμός. Μια συνύπαρξη που ευθύνεται σε μεγάλο βαθμό για την εξπρεσιονιστική ποιητική εικόνα του έργου της. Το δεύτερο σημείο που θα ήθελα να υπογραμμίσω αφορά τη σχέση της Κέιν με την τρίτη κυρίως φάση του φεμινισμού και τη θεωρία του κουήρ καθώς αναφέρεται στη σταδιακή – όλο και μεγαλύτερη από έργο σε έργο – αποδόμηση του σεξουαλικού φύλου των προσώπων. Αυτό που κάνει ιδιαίτερα ενδιαφέρουσα την αποδόμηση του φύλου στο έργο της Κέιν είναι ότι γίνεται ταυτόχρονα με μια άλλη σταδιακή αποδόμηση, την αποδόμηση του ίδιου του δραματικού προσώπου. Το περιεχόμενο δηλαδή περνάει στη μορφή και τα χαρακτηριστικά της ταυτότητας των προσώπων χάνονται όλο και περισσότερο από έργο σε έργο, ενώ τα ίδια τείνουν να γίνουν αόρατα πίσω από τις λέξεις.
description: In this work, I try to analyze the work of Sarah Kane in relation to feminist theory. I deal separately with the demands of the second and third phase of feminism. I try to focus on a comparison of feminist demands posed by Butler and those posed by Kane…
Η Κατασκευή της εθνικής ταυτότητας στα σχολικά εγχειρίδια ‘Κείμενα Νεοελληνικής Λογοτεχνίας’ του Γυμνασίου
Creators: name: Περπιράκη, Μαρία Κοσμά
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: εθνική ταυτότητα
σχολικά εγχειρίδια
λογοτεχνία
national identity
school textbooks
literature

description: Σκοπός της εργασίας αυτής είναι η ανάδειξη των χαρακτηριστικών της εθνικής ταυτότητας αλλά και των τρόπων με τους οποίους αυτά κατασκευάζονται μέσα από τα σχολικά εγχειρίδια του Γυμνασίου για το μάθημα της λογοτεχνίας. Το θεωρητικό μέρος της εργασίας εξετάζει τις θεωρίες της λογοτεχνίας και της εθνικής ταυτότητας επιλέγοντας την αποδομιστική προσέγγιση. Στο δεύτερο μέρος των αναλύσεων αναλύονται οι ενότητες των σχολικών εγχειριδίων με επιλεκτική παρουσίαση λογοτεχνικών αποσπασμάτων, με τη μέθοδο της κριτικής ανάλυσης λόγου, της αποδομιστικής λογοτεχνικής κριτικής και της θεωρίας της αναπλαισίωσης.
description: Οbject of this paper is to reveal the characteristics, the elements of the Greek national identity and to show the ways by which this identity is constructed through the school textbooks for the teaching of Literature in the secondary school. The theoretical part of the paper examines the literary theories and the theories of national identities and explains why a deconstructive approach is necessary. In the second part of the paper each chapter of the schoolbooks has been analyzed. One literary text from each chapter has been chosen as the example of the analysis which follows the methodological paradigms of the critical discourse analysis, the deconstructive literary criticism and the decontextualization theory.
Light baryon spectrum using improved interpolating operators
Creators: name: Lattice Hadron Physics Collaboration
name: Basak, S.
name: Edwards, R. G.
name: Fleming, G. T.
name: Juge, J.
name: Lichtl, A.
name: Richards, C. Morningstar D. G.
name: Sato, I.
name: Wallace, S. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Energies for excited light baryons are computed in quenched QCD with a pion mass of 490 MeV. Operators used in the simulations include local operators and the simplest nonlocal operators that have nontrivial orbital structures. All operators are designed with the use of Clebsch-Gordan coefficients of the octahedral group so that they transform irreducibly under the group rotations. Matrices of correlation functions are computed for each irreducible representation, and then the variational method is applied to separate mass eigenstates. We obtained 17 states for isospin 1/2 and 11 states for isospin 3/2 in various spin-parity channels including $J^P=5/2^\pm$. The pattern of the lowest-lying energies from each irrep is discussed. We use anisotropic lattices of volume $24^3\times 64$ with temporal lattice spacing $a_t^{-1}=6.05$ GeV with renormalized anisotropy $ξ=3.0$.
description: 7 pages, 3 figures, talk given at Lattice 2006 (spectroscopy)
Three dimensional DKP oscillator in a curved Snyder space
Creators: name: Hamil, B.
name: Merad, M.
name: Birkandan, T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The Snyder-de Sitter model is an extension of the Snyder model to a de Sitter background. It is called triply special relativity (TSR) because it is based on three fundamental parameters: speed of light, Planck mass, and the cosmological constant. In this paper, we study the three dimensional DKP oscillator for spin zero and one in the framework of Snyder-de Sitter algebra in momentum space. By using the technique of vector spherical harmonics the energy spectrum and the corresponding eigenfunctions are obtained for both cases.
description: 12 pages, 4 figures
Μέτρηση της τεχνικής αποτελεσματικότητας στην ελληνική εκπαίδευση:
Creators: name: Παντελίδης, Βασίλειος Θεόδωρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Τεχνική αποτελεσματικότητα
Μη παραμετρικές μέθοδοι
Περιβάλλοντα ανάλυσης δεδομένων
Technical efficiency
Non-parametric methods
Data envelopment analysis

description: Το ενδιαφέρον για την αποτελεσματικότητα του εκπαιδευτικού συστήματος κάθε χώρας είναι πολύ υψηλό καθώς και των παραγόντων που επηρεάζουν άμεσα ή έμμεσα την αποτελεσματικότητα αυτή. Η παρούσα εργασία εξετάζει την περίπτωση της Δευτεροβάθμιας Εκπαίδευσης του Νομού Φλώρινας κατά την περίοδο 2001-2008. Τα αποτελέσματα που βρέθηκαν έδειξαν ότι η τεχνική αποτελεσματικότητα των λυκείων του Νομού Φλώρινας είναι σχετικά ικανοποιητική, ενώ υπάρχουν χρονιές που κάποια σχολεία κατάφεραν να έχουν πλήρη αποτελεσματικότητα. Η ανάλυση υποδεικνύει ότι οι κύριοι παράγοντες επιρροής της τεχνικής αποτελεσματικότητας (ΤΕ) είναι οι παράγοντες της εντοπιότητας των μαθητών, καθώς και της βάσης του «δέκα (10)» που εισήχθη το 2005 για την εισαγωγή μαθητών στην Τριτοβάθμια εκπαίδευση.
description: The interest for the effectiveness of educational system of each country is very high as well as the factors that influence directly or indirectly this effectiveness. The present work examines the case of Secondary Education of Prefecture Florina at period 2001-2008. The results that were found showed that the technical effectiveness of lycea of Prefecture Florina is relatively satisfactory, while certain schools accomplished to have complete effectiveness specific years. The analysis indicates that the main factors of influence of technical effectiveness ([TE]) are the factors of students being local inhabitants , as well as the base of “ten (10)” that was the main criterion for the access of students to the imported the Third degree education in 2005.
GAN-GA: A Generative Model based on Genetic Algorithm for Medical Image Generation
Creators: name: AbdulRazek, M.
name: Khoriba, G.
name: Belal, M.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: I.2.10; I.4.9; J.3
subject: 68T05, 68T07, 68T45, 68U10 (Primary), 92C55 (Secondary)

description: Medical imaging is an essential tool for diagnosing and treating diseases. However, lacking medical images can lead to inaccurate diagnoses and ineffective treatments. Generative models offer a promising solution for addressing medical image shortage problems due to their ability to generate new data from existing datasets and detect anomalies in this data. Data augmentation with position augmentation methods like scaling, cropping, flipping, padding, rotation, and translation could lead to more overfitting in domains with little data, such as medical image data. This paper proposes the GAN-GA, a generative model optimized by embedding a genetic algorithm. The proposed model enhances image fidelity and diversity while preserving distinctive features. The proposed medical image synthesis approach improves the quality and fidelity of medical images, an essential aspect of image interpretation. To evaluate synthesized images: Frechet Inception Distance (FID) is used. The proposed GAN-GA model is tested by generating Acute lymphoblastic leukemia (ALL) medical images, an image dataset, and is the first time to be used in generative models. Our results were compared to those of InfoGAN as a baseline model. The experimental results show that the proposed optimized GAN-GA enhances FID scores by about 6.8\%, especially in earlier training epochs. The source code and dataset will be available at: https://github.com/Mustafa-AbdulRazek/InfoGAN-GA.
description: 10 pages, 2 figures. Abstract published in Frontiers in Medical Technology, presented at the 27th Conference on Medical Image Understanding and Analysis 2023. DOI: 10.3389/978-2-8325-1231-9. URL: https://doi.org/10.3389/978-2-8325-1231-9
When is a Bol loop Moufang?
Creators: name: Chein, Orin
name: Goodaire, Edgar G.
name: Kinyon, Michael
Publisher: name: arXiv
Year: 2008
Subjects: subject: Group Theory (math.GR)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 20N05, 17D15

description: There are a number of identities which, if satisfied by a Bol loop, imply that the loop is actually Moufang. In this paper we show that in a number of cases, the Moufang identity is also forced not by a single identity, but by giving elements a choice of equations to satisfy.
description: 11 pages. V.2: new result: no SRAR loops of odd order; other minor revisions. V3: final version with referee's suggestions, to appear in Alg. Colloq. Note new title and abstract
A Fast Graph Program for Computing Minimum Spanning Trees
Creators: name: Courtehoute, Brian
name: Plump, Detlef
Publisher: name: arXiv
Year: 2020
Subjects: subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences

description: When using graph transformation rules to implement graph algorithms, a challenge is to match the efficiency of programs in conventional languages. To help overcome that challenge, the graph programming language GP 2 features rooted rules which, under mild conditions, can match in constant time on bounded degree graphs. In this paper, we present an efficient GP 2 program for computing minimum spanning trees. We provide empirical performance results as evidence for the program's subquadratic complexity on bounded degree graphs. This is achieved using depth-first search as well as rooted graph transformation. The program is based on Boruvka's algorithm for minimum spanning trees. Our performance results show that the program's time complexity is consistent with that of classical implementations of Boruvka's algorithm, namely O(m log n), where m is the number of edges and n the number of nodes.
description: In Proceedings GCM 2020, arXiv:2012.01181
The Search for Feebly-Interacting Particles
Creators: name: Lanfranchi, Gaia
name: Pospelov, Maxim
name: Schuster, Philip
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: At the dawn of a new decade, particle physics faces the challenge of explaining the mystery of dark matter, the origin of matter over antimatter in the Universe, the apparent fine-tuning of the electro-weak scale, and many other aspects of fundamental physics. Perhaps the most striking frontier to emerge in the search for answers involves new physics at mass scales comparable to familiar matter, below the GeV scale, but with very feeble interaction strength. New theoretical ideas to address dark matter and other fundamental questions predict such feebly interacting particles (FIPs) at these scales, and indeed, existing data may even provide hints of this possibility. Emboldened by the lessons of the LHC, a vibrant experimental program to discover such physics is under way, guided by a systematic theoretical approach firmly grounded on the underlying principles of the Standard Model. We give an overview of these efforts, their motivations, and the decadal goals that animate the community involved in the search for FIPs, with special focus on accelerator-based experiments.
description: 42 pages, 9 figures
Eulerian 2-Complexes
Creators: name: Hammack, Richard H.
name: Kainen, Paul C.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 57Q35, 05C40

description: It is shown that Euler's theorem for graphs can be generalized for 2-complexes. Two notions that generalize cycle and Eulerian tour are introduced (``circlet'' and ``Eulerian cover''), and we show that for a strongly-connected, pure 2-complex, the following are equivalent: (i) each edge meets a positive even number of 2-cells (faces), (ii) the complex can be decomposed as the face-disjoint union of circlets, and (iii) the complex has an Eulerian cover. A number of examples are provided.
description: 13 pages, 15 figures
title: Αριθμητική ανάλυση βέλτιστου ελέγχου διαφορικών εξισώσεων
titleType: AlternativeTitle
title: Numerical analysis of optimal control governed differential equations
Creators: name: Krimpeni, Asimina A.
Publisher: name: National Technological University of Athens
Year: 2012
Subjects: Βέλτιστος έλεγχος
Διαφορικές εξισώσεις
Βελτιστοποίηση
Γενικευμένος (Μη Κυρτός) έλεγχος
Διακριτοποίηση
Αριθμητικές εφαρμογές
Optimal control
Differential equations
Optimization
Relaxed (Non-Convex) control
Discretization
Numerical applications

description: 85 σ.
description: Η παρούσα διατριβή έχει στόχο την ανάπτυξη της θεωρίας, κυρίως διακριτών, προβλημάτων κλασικού και γενικευμένου βέλτιστου ελέγχου μη γραμμικών, ως προς τον έλεγχο και την κατάσταση, συνήθων διαφορικών εξισώσεων με περιορισμούς στον έλεγχο και στην κατάσταση. Η μεθοδολογία που χρησιμοποιούμε είναι αυτή των μη γραμμικών διαφορικών εξισώσεων, της βελτιστοποίησης, και της μελέτης της συμπεριφοράς στο όριο των διακριτών ιδιοτήτων βελτιστότητας, καθώς και της αποδεκτότητας της βελτιστοποίησης και των αναγκαίων και ικανών συνθηκών βελτιστότητας. Το αποτέλεσμα της παραπάνω θεωρίας είναι η ανάπτυξη αντιστοίχων αριθμητικών μεθόδων διακριτοποίησης-βελτιστοποίησης για την επίλυση των παραπάνω προβλημάτων σε Υπολογιστή, οι οποίες εξασφαλίζουν οικονομικά και αποτελεσματικά την εύρεση λύσεων στα εν λόγω προβλήματα, και μάλιστα στα δυσεπίλυτα μη κυρτά προβλήματα βέλτιστου ελέγχου.
description: The goal of this thesis is the development of the theory and numerical applications to classical and relaxed optimal control problems for non-linear ordinary differential equations. In addition, we develop, parallely to the continuous theory, a discrete analogue and show its convergence to the continuous. To this end, we have used the methodology of non-linear differential equations, of optimization, and in addition we studied the limiting behavior of discrete optimality, of discrete admissibility, of discrete extremality a la Pontryagin and the necessary and sufficient conditions for optimality. The result of all the above is the development of efficient discretization/optimization algorithms for solving the problems-in-question by computer. These methods provide economical and efficient solutions to the above non-convex problems of optimal control.
title: Ischämische Veränderungen im OCT beim frischen Zentralarterienverschluss innerhalb verschiedener Zeitfenster
Creators: name: Schultheiss, Maximilian
name: Ochakovski, A.
name: Dimopoulos, S.
name: Fischer, D.
name: Sinan, M.
name: Kromer, R.
name: Spitzer, M.S.
Publisher: name: German Medical Science GMS Publishing House
Year: 2019
Subjects: subject: 610 Medical sciences; Medicine

description: Fragestellung: Die Behandlung eines frischen Zentralarterienverschlusses (ZAV) ist zeitabhängig. Häufig ist Zeitpunkt des Beginns jedoch in der klinischen Praxis schwierig bestimmbar – auch da zahlreiche Zentralarterienverschlüsse während des Schlafs auftreten. Im Rahmen der[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 32. Jahrestagung der Retinologischen Gesellschaft
title: Die Bedeutung des Spot-Signs bei Patienten mit Zentralarterienverschluss
Creators: name: Fischer, Charlotte
name: Schmieder, M.
name: Bemme, S.
name: Liman, J.
name: Feltgen, N.
Publisher: name: German Medical Science GMS Publishing House
Year: 2019
Subjects: subject: 610 Medical sciences; Medicine

description: Hintergrund: Der sonographische Nachweis eines retrobulbären Spot-Signs (SpS), eines hyperreflektiven Signals in der Zentralarterie bei Patienten mit Zentralarterienverschluss (ZAV), gilt als Korrelat eines kalzifizierten Embolus und gibt Hinweis auf die Genese des ZAV. Bisher ist noch unklar, [zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 32. Jahrestagung der Retinologischen Gesellschaft
Phonological representation of Spanish vibrants
Creators: name: Valerga, Vanessa N.
Publisher: name: University of British Columbia
Year: 2009

description: Spanish has two rhotics: a tap [r] and a trill [r]. Their distribution is interesting because they are found to be in contrast, in complementary distribution and in free variation depending on their position within the syllable and on the adjacent segments. I intend here to explore how to account for the observed distributions and to propose an appropriate phonological representation for these sounds. It will be claimed that the difference between a tap and a trill is prosodic in nature. I also explore the possibility of relating the facts that describe the distribution of r-sounds with those of the well-studied cases of stop/fricative alternations in the same language and whether a unified account of both phenomena is possible. In order to achieve this, I examine data from syllable structure, stress assignment, dialectal variation and historical development. The analysis put forth here is constructed within the theoretical frameworks of Moraic Theory (Hyman 1985, Hayes 1989), the Nuclear Moraic Model (Shaw 1992), Autosegmental Phonology (Goldsmith 1976) and Optimality Theory (Prince and Smolensky 1993).
D8.2 Project website and baseline dissemination materials
Creators: name: Loureiro, Tatiana
name: Sterling, Raymond
name: Loureiro, Tiago
Publisher: name: Zenodo
Year: 2019

description: Information about the creation, architecture, design, implementation and maintenance of the project’s website, as well as details of the plan for the social media networks of DRIvE (Twitter and LinkedIn). Presentation of the branding materials developed, and in plan to produce, used for the communication of the project.
The cost of universality: A comparative study of the overhead of state distillation and code switching with color codes
Creators: name: Beverland, Michael E.
name: Kubica, Aleksander
name: Svore, Krysta M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Estimating and reducing the overhead of fault tolerance (FT) schemes is a crucial step toward realizing scalable quantum computers. Of particular interest are schemes based on two-dimensional (2D) topological codes such as the surface and color codes which have high thresholds but lack a natural implementation of a non-Clifford gate. In this work, we directly compare two leading FT implementations of the T gate in 2D color codes under circuit noise across a wide range of parameters in regimes of practical interest. We report that implementing the T gate via code switching to a 3D color code does not offer substantial savings over state distillation in terms of either space or space-time overhead. We find a circuit noise threshold of 0.07(1)% for the T gate via code switching, almost an order of magnitude below that achievable by state distillation in the same setting. To arrive at these results, we provide and simulate an optimized code switching procedure, and bound the effect of various conceivable improvements. Many intermediate results in our analysis may be of independent interest. For example, we optimize the 2D color code for circuit noise yielding its largest threshold to date 0.37(1)%, and adapt and optimize the restriction decoder finding a threshold of 0.80(5)% for the 3D color code with perfect measurements under Z noise. Our work provides a much-needed direct comparison of the overhead of state distillation and code switching, and sheds light on the choice of future FT schemes and hardware designs.
description: 69 pages
Witten effect, anomaly inflow, and charge teleportation
Creators: name: Fukuda, Hajime
name: Yonekura, Kazuya
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study a phenomenon that electric charges are "teleported" between two spatially separated objects without exchanging charged particles at all. For example, this phenomenon happens between a magnetic monopole and an axion string in four dimensions, two vortices in three dimensions, and two M5-branes in M-theory in which M2-charges are teleported. This is realized by anomaly inflow into these objects in the presence of cubic Chern-Simons terms. In particular, the Witten effect on magnetic monopoles can be understood as a general consequence of anomaly inflow, which implies that some anomalous quantum mechanics must live on them. Charge violation occurs in the anomalous theories living on these objects, but it happens in such a way that the total charge is conserved between the two spatially separated objects. We derive a formula for the amount of the charge which is teleported between the two objects in terms of the linking number of their world volumes in spacetime.
description: 28 pages, 5 figures