cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Photon polarization entanglement induced by biexciton: experimental evidence for violation of Bell's inequality
Creators: name: Oohata, Goro
name: Shimizu, Ryosuke
name: Edamatsu, Keiichi
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We have investigated the polarization entanglement between photon pairs generated from a biexciton in a CuCl single crystal via resonant hyper parametric scattering. The pulses of a high repetition pump are seen to provide improved statistical accuracy and the ability to test Bell's inequality. Our results clearly violate the inequality and thus manifest the quantum entanglement and nonlocality of the photon pairs. We also analyzed the quantum state of our photon pairs using quantum state tomography.
description: 4 pages, 5 figures
Corporate voluntary disclosures of pre-decision information
Creators: name: Sankar, Mandira R.
Publisher: name: University of British Columbia
Year: 2008

description: This dissertation consists of two essays in the area of corporate voluntary disclosure of predecision information. The first essay entitled, "Disclosure Choice in a Duopoly", focusses on the phenomenon of partial disclosure, where the manager of the firm discloses selected signals and withholds the rest. The manager may or may not receive private information which is related to both firm-specific and industry-wide common factors. The motivation for disclosure (non-disclosure) is derived from the proprietary nature of the manager's private information. The cost (benefit) of disclosure is modelled in an imperfectly competitive product market, where an uninformed opponent’s reaction to a disclosure affects the manager's expected profit. Our results indicate that the nature of the manager's optimal disclosure policy is crucially dependent on whether the signal is more informative about firm-specific or industry-wide common factors. Unfavourable news is disclosed and favourable news withheld if the signal is more informative about common factors. On the other hand, favourable news is disclosed and unfavourable news is withheld if the signal is more informative about firm-specific factors. Comparative statics show that the sensitivity of the optimal disclosure policy and the probability of disclosure to some key parameters are also dependent on this characteristic of a signal. The empirical implications of our results suggest that when testing hypotheses involving voluntary disclosures, failure to take the above characteristic into account may confound the results. The second essay entitled, "Disclosure and Reputation in Credit Markets", deals with a different aspect of voluntary disclosures. A reputation game is modelled in the absence of credible disclosure. The manager's ability with respect to obtaining predecision information is of interest to the firm's creditors. The manager's future nominal interest charges depend on the creditors' belief about the manager's ability, i.e., on his reputation. Hence, the manager attempts to communicate this ability through sub-optimal production choice and creditors learn about the manager by observing the end of period revenue realization. If credible disclosures are possible the manager may make direct disclosures to communicate his information gathering ability to the creditors. This alternative mechanism avoids the cost of reputation building incurred by selecting a suboptimal project. However, it is shown that if these two mechanisms for reputation acquisition are not "independent", then the possibility of disclosure increases the manager's incentive to select a sub-optimal action.
Evolutionary optimization of contexts for phonetic correction in speech recognition systems
Creators: name: Viana-Cámara, Rafael
name: Campos-Sobrino, Diego
name: Campos-Soberanis, Mario
Publisher: name: arXiv
Year: 2021
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Computation and Language (cs.CL)
subject: Sound (cs.SD)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Automatic Speech Recognition (ASR) is an area of growing academic and commercial interest due to the high demand for applications that use it to provide a natural communication method. It is common for general purpose ASR systems to fail in applications that use a domain-specific language. Various strategies have been used to reduce the error, such as providing a context that modifies the language model and post-processing correction methods. This article explores the use of an evolutionary process to generate an optimized context for a specific application domain, as well as different correction techniques based on phonetic distance metrics. The results show the viability of a genetic algorithm as a tool for context optimization, which, added to a post-processing correction based on phonetic representations, can reduce the errors on the recognized speech.
description: 13 pages, 4 figures, This article is a translation of the paper "Optimizaci\'on evolutiva de contextos para la correcci\'on fon\'etica en sistemas de reconocimiento del habla" presented in COMIA 2019
Cosmological Implications of the String Theory Landscape
Creators: name: Mersini-Houghton, Laura
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Progress in string theory has resulted in a whole landscape of vacua solutions.In this talk I describe a proposal for exploring the cosmological implications of the landscape, based on the dynamics of the wavefunction of the universe propagating on it. The landscape is taken as the phase space of the initial conditions since every of its vacua can potentially give rise to a universe. A superselection rule on the landscape phase space emerges when we include the backreaction of massive long wavelengths and the quantum dynamics of gravitational and matter degrees of freedom. The quantum dynamics of the system selects only high energy patches which survive the collapse induced by the gravitational instability of massive perturbations.
description: 7 pages, Talk given at 'The Dark Side of the Universe 2006', Madrid. To be published by AIP
Η σχέση της κοινωνιομετρικής θέσης με τη μαθησιακή και γλωσσική επάρκεια μαθητών προσχολικής ηλικίας.
Creators: name: Δόμνογλου, Μαρία Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: κοινωνιομετρική θέση
μαθησιακή επάρκεια
γλωσσική επάρκεια
sociometric status
learning aptitude
language aptitude

description: Η παρούσα έρευνα διερεύνησε την σχέση της μαθησιακής και γλωσσικής επάρκειας με την κοινωνιομετρική θέση που καταλαμβάνουν τα νήπια σε μια σχολική τάξη, μέσα από μια μελέτη περίπτωσης σε 55 νήπια, 4,05 έως 6 ετών που φοιτούν σε ιδιωτικό νηπιαγωγείο της Θεσσαλονίκης. Κατά τη διαδικασία συλλογής των δεδομένων, οι συμμετέχοντες απάντησαν σε κοινωνιομετρικό ερώτημα, αιτιολογώντας την θέση τους και έπειτα χορηγήθηκε σε αυτούς το κριτήριο μαθησιακής επάρκειας- Detroit και το κριτήριο γλωσσικής επάρκειας- Λατώ, τα οποία εξετάζουν τις υπό μελέτη μεταβλητές. Τα αποτελέσματα αυτά, συνδέθηκαν με την στάση των νηπιαγωγών των συγκεκριμένων παιδιών. Η αξιοπιστία των κριτηρίων για το ελληνικό δείγμα είναι υψηλή. Σχετικά με τα αποτελέσματα, ενώ επιβεβαιώνεται ισχυρή συσχέτιση κοινωνιομετρικής θέσης και μαθησιακής επάρκειας, δεν αποτυπώνεται σε επίπεδο αιτιολόγησης. Παρουσιάστηκε μαζική συγκέντρωση των μαθητών στο κοινωνιομετρικό πλαίσιο του μέσου όρου και τη μικρή συχνότητα θετικών ή αρνητικών ακραίων αποκλίσεων. Καταληκτικά, οι μαθησιακές και γλωσσικές ανεπάρκειες δύνανται να αποτελέσουν τροχοπέδη στην ένταξη του παιδιού στο κοινωνικό σχολικό σύνολο όμως δεν αποτελούν απόλυτα καθοριστικό παράγοντα. Εν ολίγοις, η μαθησιακή ή γλωσσική αδυναμία αναγνωρίζεται από τα παιδιά ως δυσμενής παράγοντας στην ανάπτυξη σχέσεων, ωστόσο παράλληλα συνεκτιμούνται κριτήρια διαφορετικής φύσης, όπως τα ποιοτικά χαρακτηριστικά της προσωπικότητας, τα συμπεριφορικά στοιχεία και η ποιότητα του παιχνιδιού που αναπτύσσεται μεταξύ τους.
description: The present Thesis investigates the connection between the sociometric status of kindergarten children and their learning and language aptitude, through a case study including 55 students of a private kindergarten in Thessaloniki, between the ages of 4,05 and 6. During the data’ collection process, participants answered the sociometric question, reasoning their answer, and they took the Detroit Test of Learning Aptitude Dtla-P:3 and the La-T-o Test of Lingual Aptitude, which measure the needed variables. The results were collated with what their teachers think. The tests’ reliability, regarding the Greek students, is considered high. The statistic analysis of the results showed strong correlation between a student’s learning aptitude and sociometric status, although this did not resulted out of the reasoning. The majority of students were sociometric ranked as average, whereas only a few were ranked at the sociometric edges. Concluding, the research shows that cognitive and linguistic weaknesses may cause difficulties into the child’s intergration in the school social system. They can also affect the creation of social relationships, although children tend to take under consideration other factors as well, such as behavior, personality and play quality.
On the classification of rank two representations of quasiprojective fundamental groups
Creators: name: Corlette, Kevin
name: Simpson, Carlos T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: Suppose $X$ is a smooth quasiprojective variety over $\cc$ and $ρ: π_1(X,x) \to SL(2,\cc)$ is a Zariski-dense representation with quasiunipotent monodromy at infinity. Then $ρ$ factors through a map $X\to Y$ with $Y$ either a DM-curve or a Shimura modular stack.
description: minor changes in exposition, citations
What Produces Dust Polarization in the HH 212 Protostellar Disk at 878 μm: Dust Self-Scattering or Dichroic Extinction?
Creators: name: Lee, Chin-Fei
name: Li, Zhi-Yun
name: Yang, Haifeng
name: Lin, Zhe-Yu Daniel
name: Ching, Tao-Chung
name: Lai, Shih-Ping
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report new dust polarization results of a nearly edge-on disk in the HH 212 protostellar system, obtained with ALMA at ~ 0.035" (14 au) resolution in continuum at lambda ~ 878 um. Dust polarization is detected within ~ 44 au of the central source, where a rotationally supported disk has formed. The polarized emission forms V-shaped structures opening to the east and probably west arising from the disk surfaces and arm structures further away in the east and west that could be due to potential spiral arms excited in the outer disk. The polarization orientations are mainly parallel to the minor axis of the disk, with some in the western part tilting slightly away from the minor axis to form a concave shape with respect to the center. This tilt of polarization orientations is expected from dust self-scattering, e.g., by 50-75 um grains in a young disk. The polarized intensity and polarization degree both peak near the central source with a small dip at the central source and decrease towards the edges. These decreases of polarized intensity and polarization degree are expected from dichroic extinction by grains aligned by poloidal fields, but may also be consistent with dust self-scattering if the grain size decreases toward the edges. It is possible that both mechanisms are needed to produce the observed dust polarization, suggesting the presence of both grain growth and poloidal fields in the disk.
description: 24 pages, 6 figures
Molecular configurations in a droplet detachment process of a complex liquid
Creators: name: Sattler, R.
name: Kityk, A.
name: Wagner, C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We studied the microscopic polymer conformations in the droplet detachment process of an elastic semi-dilute polyelectrolytic Xanthan solution by measuring the instantaneous birefringence. As in earlier studies, we observe the suppression of the finite time singularity of the pinch-off process and the occurrence of an elastic filament. Our microscopic measurements reveal that the relatively stiff Xanthan molecules are already significantly pre-stretched to about 90 % of their final extension at the moment the filament appears. At later stages of the detachment process, we find evidence of a concentration enhancement due to the elongational flow.
Το δόγμα της «ευθύνης προστασίας» και η επέμβαση του ΝΑΤΟ στη Λιβύη. Η περίπτωση της Συριακής κρίσης
Creators: name: Παπαδόπουλος, Διομήδης Αναστάσιος
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Ευθύνη προστασίας
ΝΑΤΟ
Λιβύη - Συρία
Responsibility to protect
Libya - Syria

description: Σκοπός της διατριβής ήταν η μελέτη της επέμβασης του ΝΑΤΟ στη Λιβύη στο πλαίσιο του δόγματος της ευθύνης προστασίας καθώς και η εφαρμογή του από τη διεθνή κοινότητα στην περίπτωση της Συριακής κρίσης. Αρχικά γίνεται μια προσέγγιση του δόγματος της ευθύνης προστασίας από τη γέννηση του και την ανάδυση του από την έννοια της ανθρωπιστικής επέμβασης, ενώ στην συνέχεια αναλύονται τα βασικά συστατικά του καθώς και συνοπτικά οι πυλώνες στους οποίους εδράζεται η εφαρμογή του. Ακολούθως διερευνώνται τα ζητήματα και οι προβληματισμοί που προκύπτουν τόσο από την ευθύνη των ίδιων των κρατών, όσο και των διεθνών οργανισμών (περιφερειακών και μη) υπό το πρίσμα του διεθνούς δικαίου. Έπειτα εξετάζεται η σχέση της κρατικής κυριαρχίας και της διεθνούς ευθύνης προστασίας, ενώ παράλληλα επιχειρείται η σύνδεση της διεθνούς ευθύνης και της εθνικής κυριαρχίας στο πλαίσιο εφαρμογής του δόγματος της ευθύνης προστασίας. Τέλος αναλύονται οι σημαντικότερες μελέτες περίπτωσης εφαρμογής του με ιδιαίτερη έμφαση στην επέμβαση του ΝΑΤΟ στη Λιβύη το οποίο διεξήγαγε επιχειρήσεις για την ανατροπή του καθεστώτος του Καντάφι. Επιπλέον θα παρατεθούν αναλυτικά και οι περιπτώσεις του Κοσσόβου με την αμφιβόλου νομιμότητας επέμβαση του ΝΑΤΟ, καθώς και της Συρίας η οποία έχει στιγματιστεί από την αδράνεια της διεθνούς κοινότητας.
description: The aim of the present thesis was to study the NATO intervention in Libya under the responsibility to protect doctrine and its implementation by the international community in the case of the Syrian crisis. First we are approaching the doctrine of the responsibility to protect from its birth and the emergence of the concept of humanitarian intervention. Τhen we are analyzing the main components of r2p as well as the pillars on which rests the application. Furthermore are being investigated the issues and concerns that arise both from the responsibility of the states, and international organizations (regional or otherwise) in the light of international law. It is also examined the relationship of state sovereignty and international responsibility to protect, while we are attempting to connect the international liability and sovereignty in the context of implementation of the responsibility to protect doctrine. Another aim of this study was to analyze the most important case studies, with particular emphasis on NATO’s intervention in Libya which has conducted military operations in order to overthrow the Gaddafi regime. In addition it is analyzed the case of Kosovo with the questionable legitimacy of the NATO intervention, as well as the case of Syrian crisis which has been stigmatized by the inaction of the international community.
Η΄Εννοια της Ατομικής Ελευθερίας στον Τζον Λοκ και τον Φρίντριχ Χάγιεκ
Creators: name: Μίχος, Βασίλειος Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Λοκ
Χάγιεκ
Ελευθερία
Locke
Hayek
Freedom

description: Σκοπός της εργασίας ήταν η παρουσίαση και η συγκριτική αποτίμηση της έννοιας της ατομικής ελευθερίας στο έργο των Τζον Λοκ και Φρίντριχ Χάγιεκ. Παρουσιάσαμε, ξεχωριστά στον κάθε συγγραφέα, την έννοια της ελευθερίας, έτσι όπως αυτή εντάσσεται στο πλαίσιο του θεωρητικού του σχήματος. Ακόμη, αναφερθήκαμε στην αντίληψη του καθενός για τη φύση της πολιτικής κοινωνιας και του Ορθού Λόγου. Στη συνέχεια, εξετάσαμε τη σχέση της ελευθερίας με άλλες θεμελιώδεις έννοιες της πολιτικής φιλοσοφίας, όπως η ισότητα και η ατομική ιδιοκτησία. Επιπλέον, παρουσιάσαμε τη θεωρητική διάκριση μεταξύ της αρνητικής και θετικής ελευθερίας και εξετάσαμε τις δύο εκδοχές της ελευθερίας εν όψει αυτής της διάκρισης. Τέλος, επιχειρήσαμε να αναδέιξουμε τις συγκλίσεις και τις αποκλίσεις μεταξύ των δύο θεωριών.
description: The aim of the thesis was to present the comparative assessment of the concept of individual freedom in the work of John Locke and Friedrich Hayek. We presented separately to each author, the concept of freedom, as a part of each theoretical scheme. Furthermore, we discussed the view of each thinker about the nature of civil society and Reason. Then, we examined the relationship of the concept of freedom to other fundamental concepts of political philosophy, such as equality and private property. Furthermore, we presented the theoretical distinction between negative and positive liberty and tested the two versions of freedom in view of this distinction. Finally, we tried to highlight the convergences and divergences between the two theories.
Spatial competition and nonlinear responses in marketing
Creators: name: Krider, Robert E.
Publisher: name: University of British Columbia
Year: 2008

description: Spatial competition, in the context of industry-wide changes in retailing formats and strategies, is addressed in this dissertation from a theoretical modelling perspective. Chapter2 develops a normative individual choice model to explore how "power retailers" affect grocery shopping behaviour, and, consequently, market share. Power retailers are very large retail outlets that compete primarily on price, and are known variously as warehouse clubs, category killers, and superstores. The model shows that consideration of consumer stockpiling can lead to an "increasing returns" nonlinear response of market share to price reductions, and that the effect is not noticeable when competitors have small price differences. The model also differentiates between perishable and nonperishable goods, and shows that this may drive planned multistore shopping. Chapter 3 starts with the observation that competent management in many sectors of retailing, including grocery retailing, requires an ability to respond quickly and effectively to unexpected adversity. This dynamic is included in an oligopolistic spatial interaction model, and the system is shown to evolve to a novel and robust stochastic steady state known as self-organized criticality (SOC). One characteristic of the SOC state is that it allows small exogenous shocks to produce large responses at a rate greater than would be expected if the law of large numbers applied. This work represents the first known investigation of SOC in a marketing setting.
Interaction-induced beats of Friedel oscillations in quantum wires
Creators: name: Urban, D. F.
name: Komnik, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We analyze the spectrum of electron density oscillations in an interacting one-dimensional electron system with an impurity. The system's inhomogeneity is characterized by different values of Fermi wave vectors $k_F=k_{L/R}$ on left/right side of the scatterer, leading to a Landauer dipole formation. We demonstrate, that while in the noninteracting system the Friedel oscillations possess only one periodicity related to the local $k_F$, say $k_L$ on the left side, the interplay of the interactions and the Landauer dipole generates an additional peak in the spectrum of density oscillations at the counterpart $k_R$. Being only present in correlated systems, the position and shape of this spectral feature, which in coordinate space is observable as a beating pattern in the Friedel oscillations, reveals many important details about the nature of interactions. Thus it has a potential to become an investigation tool in condensed matter physics.
description: 5 pages, 4 figures
Ising spin glass models versus Ising models: an effective mapping at high temperature II. Applications to graphs and networks
Creators: name: Ostilli, Massimo
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: By applying a recently proposed mapping, we derive exactly the upper phase boundary of several Ising spin glass models defined over static graphs and random graphs, generalizing some known results and providing new ones.
description: 11 pages, 1 Postscript figure
Σύμμορφα αναλλοίωτες ποσότητες στο μιγαδικό επίπεδο και σχέσεις μεταξύ τους
Creators: name: Καραφυλλιά, Χριστίνα Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Σύμμορφα αναλλοίωτη
Αρμονικό μέτρο
Μεγιστικό μήκος
Conformal invariant
Harmonic measure
Extremal length

description: Σκοπός της διπλωματικής εργασίας ήταν η μελέτη των κυριότερων σύμμορφα αναλλοίωτων ποσοτήτων συμπεριλαμβανομένου του αρμονικού μέτρου, της συνάρτησης του Green, της υπερβολικής μετρικής και του μεγιστικού μήκους. Θεωρώντας γνωστή τη βασική θεωρία της μιγαδικής ανάλυσης, των ολόμορφων και αρμονικών συναρτήσεων, αρχικά αναφέραμε συνοπτικά τους ορισμούς των εννοιών καθώς και θεωρήματα που χρησιμοποιήσαμε στη συνέχεια. Κάναμε εκτενή αναφορά στην έννοια του αρμονικού μέτρου και της συνάρτησης του Green, τις αποδείξεις των βασικότερων ιδιοτήτων τους και τον ακριβή υπολογισμό τους μέσω ποικίλλων παραδειγμάτων. Επιπλέον, ορίσαμε την υπερβολική απόσταση και εστιάσαμε στο γεγονός ότι είναι σύμμορφα αναλλοίωτη και σε παραδείγματα υπολογισμού της υπερβολικής μετρικής. Τέλος αποδείξαμε αναλυτικά θεμελιώδεις ιδιότητες του μεγιστικού μήκους, τους τύπους υπολογισμού του σε συνήθεις τόπους καθώς και τις σχέσεις που συνδέουν τις προαναφερθέντες σύμμορφα αναλλοίωτες ποσότητες. Παρουσιάσαμε με σαφήνεια και επαρκή ανάλυση τις αποδείξεις των θεωρημάτων, των παραδειγμάτων και των σχέσεων μεταξύ των παραπάνω ποσοτήτων ώστε η μελέτη μας να καταστεί κατανοητή και πλήρης.
description: The aim of the present thesis was the study of the most important conformal invariant quantities included harmonic measure, Green’s function, hyperbolic distance and extremal length. Considering the basic theory of complex analysis, holomorphic and harmonic functions as known, first we mentioned briefly the definitions of the meanings and some theorems which we used subsequently. We explained in detail the sense of harmonic measure and Green’s function, the proofs of their most important properties and their precise calculation through diverse examples. Furthermore, we defined hyperbolic distance and focused on the fact that it is conformal invariant and on some examples of hyperbolic metric calculation. Finally, we proved analytically the fundamental properties of extremal length, the formulas of its calculation in common domains and the relations between all these conformal invariant quantities. We presented with clear and adequate explanations the proofs of theorems, examples and relations between the quantities mentioned above in order to make our thesis comprehensible and complete.
Cyclic phase in F=2 spinor condensate: Long-range order, kinks, and roughening transition
Creators: name: Pogosov, W. V.
name: Machida, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the effect of thermal fluctuations on homogeneous infinite Bose-Einstein condensate with spin F=2 in the cyclic state, when atoms occupy three hyperfine states with $m_{F}=0, \pm 2$. We use both the approach of small-amplitude oscillations and mapping of our model on the sine-Gordon model. We show that thermal fluctuations lead to the existence of the rough phase in one- and two-dimensional systems, when presence of kinks is favorable. The structure and energy of a single kink are found. We also discuss the effect of thermal fluctuations on spin degrees of freedom in F=1 condensate.
description: 6 pages, 1 figure; final version, accepted for publication in Phys. Rev. A
Asymptotic Optimality in Bayesian Change-Point Detection Problems Under Global False Alarm Probability Constraint
Creators: name: Tartakovsky, Alexander G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistics Theory (math.ST)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: Primary 62L10; secondary 60G40

description: In 1960s Shiryaev developed Bayesian theory of change detection in independent and identically distributed (i.i.d.) sequences. In Shiryaev's classical setting the goal is to minimize an average detection delay under the constraint imposed on the average probability of false alarm. Recently, Tartakovsky and Veeravalli (2005) developed a general Bayesian asymptotic change-point detection theory (in the classical setting) that is not limited to a restrictive i.i.d. assumption. It was proved that Shiryaev's detection procedure is asymptotically optimal under traditional average false alarm probability constraint, assuming that this probability is small. In the present paper, we consider a less conventional approach where the constraint is imposed on the global, supremum false alarm probability. An asymptotically optimal Bayesian change detection procedure is proposed and thoroughly evaluated for both i.i.d. and non-i.i.d. models when the global false alarm probability approaches zero.
Obstruction to lagrangian transversality
Creators: name: Karoubi, Max
name: de Souza, Maria Luiza Lapa
Publisher: name: arXiv
Year: 2007
Subjects: subject: Differential Geometry (math.DG)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics
subject: 55R10

description: We give a necessary and sufficient condition for lagrangians in a symplectic vector bundle to be deformed stably into transversal lagrangians. In the case of three lagrangians, we show that the associated Grothendieck group can be identified with a Hermitian K-theory group.
description: 7 pages ; see also http://www.math.jussieu.fr/~karoubi/
Adaptive Cheapest Path First Scheduling in a Transport-Layer Multi-Path Tunnel Context
Creators: name: Pieska, Marcus
name: Rabitsch, Alexander
name: Brunstrom, Anna
name: Kassler, Andreas
name: Amend, Markus
Publisher: name: arXiv
Year: 2021
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Bundling multiple access technologies increases capacity, resiliency and robustness of network connections. Multi-access is currently being standardized in the ATSSS framework in 3GPP, supporting different access bundling strategies. Within ATSSS, a multipath scheduler needs to decide which path to use for each user packet based on path characteristics. The Cheapest Path First (CPF) scheduler aims to utilize the cheapest path (e.g. WiFi) before sending packets over other paths (e.g. cellular). In this paper, we demonstrate that using CPF with an MP-DCCP tunnel may lead to sub-optimal performance. This is due to adverse interactions between the scheduler and end-to-end and tunnel congestion control. Hence, we design the Adaptive Cheapest Path First (ACPF) scheduler that limits queue buildup in the primary bottleneck and moves traffic to the secondary path earlier. We implement ACPF over both TCP and DCCP congestion controlled tunnels. Our evaluation shows that ACPF improves the average throughput over CPF between 24% to 86%.
description: To appear at Applied Networking Research Workshop (ANRW 2021)
Text of "Bondole Pit" II
Creators: name: Marah, Kondowulay
name: Rolle, Nicholas
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: lma

description: 6 MOV files. This is a text part of a series on bondole pit. This is the second part. It was recorded using a Zoom recorder and lapel microphone. It is a step-by-step guide on how to use the giant bondole pit to make palm oil. This is a community activity and many people are in the video. The narrator is Kondowulay Marah.
การจัดการเรียนการสอนแบบผสมผสานและการบูรณาการเกมมิฟิเคชั่นกระตุ้นการเรียนรู้ในรายวิชาโครงสร้างข้อมูลและอัลกอริทึม
Creators: name: ศรัณย์ลิตา โชติรัตน์
Publisher: name: สำนักวิทยบริการ มหาวิทยาลัยสงขลานครินทร์ วิทยาเขตปัตตานี
Year: 2019
Subjects: การจัดการเรียนการสอนแบบผสมผสาน, เกมมิฟิเคชั่น, การกระตุ้นการเรียนรู้, blended learning approach, Gamification, motivating learning

description: วารสารวิทยบริการ มหาวิทยาลัยสงขลานครินทร์, 30, 2, 69-79
A semiclassical trace formula for the canonical partition function of one dimensional systems
Creators: name: Parisio, Fernando
name: de Aguiar, M. A. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a semiclassical trace formula for the canonical partition function of arbitrary one-dimensional systems. The approximation is obtained via the stationary exponent method applied to the phase-space integration of the density operator in the coherent state representation. The formalism is valid in the low temperature limit, presenting accurate results in this regime. As illustrations we consider a quartic Hamiltonian that cannot be split into kinetic and potential parts, and a system with two local minima. Applications to spin systems are also presented.
description: 22 pages, 4 figures new section with applications to spin systems
Localized Wannier function based tight-binding models for two-dimensional allotropes of bismuth
Creators: name: Li, Qile
name: Smith, Jackson S.
name: Yin, Yuefeng
name: Wang, Chutian
name: Klymenko, Mykhailo V.
name: Cole, Jared H.
name: Medhekar, Nikhil V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: With its monoelemental composition, various crystalline forms and an inherently strong spin-orbit coupling, bismuth has been regarded as an ideal prototype material to expand our understanding of topological electronic structures. In particular, two-dimensional bismuth thin films have attracted a growing interest due to potential applications in topological transistors and spintronics. This calls for an effective physical model to give an accurate interpretation of the novel topological phenomena shown by two-dimensional bismuth. However, the conventional semi-empirical approach of adapting bulk bismuth hoppings fails to capture the topological features of two-dimensional bismuth allotropes because the electronic band topology is heavily influenced by crystalline symmetries as well as atom spacings. Here we provide a new parameterization using localized Wannier functions derived from the Bloch states in first-principles calculations. We construct new tight-binding models for three types of two-dimensional bismuth allotropes: a Bi (111) bilayer, bismuthene and a Bi(110) bilayer. We demonstrate that our tight-binding models can successfully reproduce the band structures, symmetries and topological features of these two-dimensional allotropes. We anticipate that these models can be extended to other similar two-dimensional topological structures such as antimonene and arsenene. Moreover, these models can serve as a starting point for investigating the electron/spin transport and electromagnetic response in low-dimensional topological devices.
description: 20 pages, 6 figures
A multifamily group for adolescents with emotion regulation difficulties: adolescent, parent and clinician experiences
Creators: name: Cleary, Ruth
name: Houghton, Sharon
name: O’Driscoll-Lawrie, Claire
name: Dowling, Clodagh
name: O'Hanrahan, Kevin
name: Devoy, Susan
Publisher: name: University of Limerick
Year: 2024
Subjects: classificationCode: 42
subject: Health sciences
subject: FOS: Health sciences
classificationCode: 52
subject: Psychology
subject: FOS: Psychology

description: Background: Dialectical behaviour therapy (DBT) has been successfully adapted for use with adolescents experiencing difficulties associated with the maladaptive un-dercontrol of emotion. However, clinical observation and research findings suggest that adolescents may exhibit traits of both undercontrol and overcontrol—where over-regulation of emotion predominates. In the adult population, distinct groups of individuals with under- and overcontrolled regulation styles can be identified, and treatments such as Group Radical Openness (GRO) have shown promise in treating difficulties associated with the latter. However, there are difficulties identifying distinct groups of under- and overcontrolled adolescents.
Aims: The present study therefore sought to qualitatively explore the experiences of participants (adolescents and parents) and facilitators of an intervention integrating DBT for adolescents’ skills training with GRO.
Method: Six adolescents, seven parents and six clinicians completed semi-structured interviews. Data were analysed using thematic analysis. Nine themes and six sub-themes were generated.
Findings: Findings suggested that an intervention of this type may have particular utility for adolescents with emotion regulation difficulties in the context of both over-control and undercontrol. Participants described improvements in symptoms and relational functioning, which they attributed to the evelopment of a shared language for communicating about emotion and the multifamily group context within which the intervention was delivered. Findings also emphasised the utility of rolling groups.
Discussion: Further research investigating the efficacy of this intervention is war-ranted. Strengths, limitations, future directions and implications for practice are discussed.
Αμερικανικές εκτιμήσεις για την εσωτερική και εξωτερική πολιτική της δικτατορίας του Ίον Αντονέσκου στη Ρουμανία, 1940-1944
Creators: name: Μαντζανάς, Χρήστος Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Ίον Αντονέσκου
Υπουργείο Εξωτερικών Η.Π.Α.
Β΄ Παγκόσμιος Πόλεμος
Ion Antonescu
U.S. State Department
World War II

description: Στόχος της μεταπτυχιακής διπλωματικής εργασίας ήταν η μελέτη των πληροφοριών και των εκτιμήσεων της κυβέρνησης των Η.Π.Α. για την περίοδο της ηγεσίας του Ίον Αντονέσκου στη Ρουμανία (Σεπτέμβριος 1940-Αύγουστος 1944). Για αυτόν τον σκοπό παρατέθηκαν πληροφορίες μέσα από επιλογή διπλωματικών εγγραφών, κυρίως από την αμερικανική πρεσβεία του στο Βουκουρέστι και από τον γενικό πρόξενο στην Κωνσταντινούπολη. Δόθηκαν οι πληροφορίες σχετικά με τις εξελίξεις σε ζητήματα εσωτερικής πολιτικής και για την πορεία των πολεμικών επιχειρήσεων στο Ανατολικό Μέτωπο. Ακόμη έγινε αναφορά στην αντιπολίτευση και στον Βασιλιά Κάρολο Β΄. Επίσης αφιερώθηκε μέρος για την διοίκηση στην Υπερδνειστερία κατά την περίοδο που η περιοχή είχε προσαρτηθεί στο ρουμανικό κράτος, και μέσα από αποσπάσματα ομιλιών και μαρτυρίες προσώπων γίνεται προσπάθεια να δοθεί μία εικόνα για τον χαρακτήρα του Ίον Αντονέσκου. Επιπλέον, εξετάστηκε η περίπτωση του ολοκαυτώματος στη Ρουμανία, κάνοντας αναφορά στα αντισημιτικά μέτρα της εποχής αλλά και στις διαδικασίες που οδήγησαν στην προσπάθεια εξόντωσης του εβραϊκού στοιχείου της Ρουμανίας. Τέλος, γίνεται σχολιασμός για τα πρόσωπα, τα γεγονότα της εποχής που εξετάστηκαν και για τις πληροφορίες που αντλήσαμε από τα έγγραφα.
description: The aim of this thesis was to study the information and the assessments of the U.S. Government for the period of Ion Antonescu’s leadership in Romania (September 1940-August 1944). For this purpose, information is cited through selection of diplomatic records, mostly from the U.S. embassy in Bucharest and from the consulate general in Istanbul. Information was provided on the developments in internal policy issues and on the course of the military operations on the Eastern Front. Furthermore, reference was made to the Antonescu’s opposition and to King Charles II. Also, a part of this thesis is devoted to the administration of Transistria when the region was annexed to the Romanian state, and there is an attempt to give an insight into Ion Antonescu’s character through his speeches and through references about him from various people. Moreover, we examined the case of the holocaust in Romania with reference to the anti-Semitic measures of the time and to the processes that led to the effort of exterminating the Jewish element in Romania. Finally, we comment on the people and the events of the examined period and on the information derived from the records that were used.
Tulczyjew's Triplet for Lie Groups III : Higher Order Dynamics and Reductions for Iterated Bundles
Creators: name: Esen, Oğul
name: Gümral, Hasan
name: Sütlü, Serkan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Symplectic Geometry (math.SG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Given a Lie group $G$, we elaborate the dynamics on $T^*T^*G$ and $T^*TG$, which is given by a Hamiltonian, as well as the dynamics on the Tulczyjew symplectic space $TT^*G$, which may be defined by a Lagrangian or a Hamiltonian function. As the trivializations we adapted respect the group structures of the iterated bundles, we exploit all possible subgroup reductions (Poisson, symplectic or both) of higher order dynamics.
description: arXiv admin note: substantial text overlap with arXiv:1503.06568
Cooperative behavior of qutrits with dipole-dipole interactions
Creators: name: Mandilara, A.
name: Akulin, V. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We have identified a class of many body problems with analytic solution beyond the mean-field approximation. This is the case where each body can be considered as an element of an assembly of interacting particles that are translationally frozen multi-level quantum systems and that do not change significantly their initial quantum states during the evolution. In contrast, the entangled collective state of the assembly experiences an appreciable change. We apply this approach to interacting three-level systems.
description: 5 pages, 3 figures. Minor corrections
Η κουλτούρα στη διδασκαλία μιας ξένης γλώσσας: πώς ο ελληνικός πολιτισμός μπορεί να λειτουργήσει σαν κίνητρο για την εκμάθηση της ελληνικής ως ξένης γλώσσας
Creators: name: Βασιλειάδου, Αντιγόνη Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Ελληνική γλώσσα
Ελληνικός πολιτισμός ως Κίνητρο
Greek language
Greek culture as Motivation

description: Η ένταξη της διδασκαλίας στοιχείων της ελληνικής ιστορίας και του ελληνικού πολιτισμού στο πλαίσιο προγραμμάτων διδασκαλίας της ελληνικής ως δεύτερης και ξένης γλώσσας θεσμοθετείται με νόμο από το 2005. Έτσι, τα τελευταία χρόνια η συζήτηση για τη σχέση της διδασκαλίας μιας γλώσσας ως δεύτερης ή ξένης με τη διδασκαλία στοιχείων πολιτισμού αποκτά ένα διευρυμένο ενδιαφέρον λόγω της θεσμοθέτησης προγραμμάτων που αναφέρονται στη διδασκαλία της ελληνικής γλώσσας καθώς και στοιχείων της ελληνικής ιστορίας και του πολιτισμού σε ενήλικους μαθητές, της σύνδεσής τους με διαδικασίες πιστοποίησης (πτυχίο ελληνομάθειας), αλλά κυρίως επειδή μια μεγάλη μερίδα εκπαιδευτικών θεωρεί «ανώτερης ποιότητας» το κίνητρο της «αγάπης για την Ελλάδα» στην περίπτωση των μαθητών που μαθαίνουν ελληνικά. Αρκετοί μαθητές είναι διανοούμενοι και λάτρεις του ελληνικού πολιτισμού, είναι δηλαδή ενός επιπέδου μαθαίνοντας ελληνικά από συγκίνηση και αγάπη για την Ελλάδα, όχι απλώς για πρακτικούς λόγους. Συνεπώς, λειτουργούν και μαθαίνουν διαφορετικά από τους άλλους: με κέφι!
description: The integration of the teaching of the elements of Greek history and culture into the curriculum of Greek as a secondary language has been institutionalized by law since 2005. In recent years, the debate on the relationship between education from a secondary or foreign language to educational data culture acquires a wider participation. It is true that the institutionalization programs aimed at teaching the language and elements of Greek history and culture for adult Greek students and their link with certification processes (in Greek degree). But above all because a large majority of teachers consider the "love for Greece" argument more on the part of students learning Greek. Several students are intellectuals and lovers of Greek culture: their learning of Greek takes place through the vector of emotion and love for Greece, not just for practical reasons. Therefore, they work differently from others: with pleasure!
description: Συνεργαζόμενα Τμήματα Πανεπιστήμιο Λε Μαν (Maine France, Γαλλία)
Δίκτυα συνεργασιών επιστημόνων
Creators: name: Κουσίδου, Ολγα Ευσταθίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Δίκτυα-Συνεργασία επιστημόνων
Ελληνικό Στατιστικό Ινστιτούτο
Networks-Scientific collaboration
Greek Statistical Institute

description: Κατά την τελευταία εικοσαετία, παράλληλα με την εξέλιξη της ισχύος επεξεργασίας των υπολογιστών, ένα πλήθος πολύπλοκων συστημάτων μελετήθηκε και μελετάται μέσα από την αναπαράστασή τους ως γραφήματα – δίκτυα με τη βοήθεια της θεωρίας γραφημάτων και δικτύων. Στην παρούσα μελέτη παρουσιάζεται ένα πλήθος δεικτών που χρησιμοποιείται στη στατιστική ανάλυση για την εύρεση των τοπολογικών ιδιοτήτων σε πραγματικά δίκτυα με βάρη ή χωρίς βάρη. Στη συνέχεια γίνεται εφαρμογή των δεικτών αυτών και η ερμηνεία των αποτελεσμάτων στο δίκτυο των Ελλήνων Στατιστικών που αποτελεί ένα δίκτυο επιστημονικής συνεργασίας (Scientific Collaboration Network) μεταξύ των επιστημόνων που έχουν συμμετάσχει στα ετήσια συνέδρια του Ελληνικού Στατιστικού Ινστιτούτου με εργασία που δημοσιεύτηκε στα αντίστοιχα Πρακτικά τουλάχιστον μια φορά κατά τα 20 έτη πραγματοποίησής του (1990 - 2009). Δύο συγγραφείς θεωρούνται συνεργάτες εάν έχουν συγγράψει από κοινού μία ή περισσότερες εργασίες. Κατ’ αυτό τον τρόπο κάθε συνεργασία γίνεται αντιληπτή ως σύνδεση μεταξύ δυο ατόμων και κάθε ετήσια Έκδοση των Πρακτικών μπορεί να παρασταθεί ως ένα μη κατευθυνόμενο γράφημα – δίκτυο, στο οποίο οι επιστήμονες αποτελούν τις κορυφές και οι κατά ζεύγη συνεργασίες τις ακμές. Παρουσιάζονται οι στατιστικές ιδιότητες του δικτύου που αντιστοιχεί στα 20 έτη εκδόσεων των πρακτικών, η ερμηνεία τους καθώς και αντίστοιχες αναφορές σε παρόμοια δίκτυα που έχουν παρουσιαστεί στη βιβλιογραφία.
description: During the last two decades, simultaneously with the development of the processing power of computers, a multitude of complex systems has been and is still being studied through their representation as graphs – networks using the graph and network theory. This study presents some of the indicators used in the statistical analysis to find the topological properties of real weighted or unweighted networks. Then, an application of these indicators is being made, and the results are interpreted on the network of the Greek Statisticians forming a Scientific Collaboration Network (SCN) among the scientists who have participated in the annual conferences of the Greek Statistical Institute with at least one article published in the corresponding Proceedings in the 20-year period in which the conference is taking place (1990 - 2009). Two authors are associates if they have written together one or more articles. In this way, every collaboration can be thought as a connection between two people and each annual edition of the Proceedings can be represented as an undirected graph – network, in which scientists are the vertices and pairwise collaborations are the edges. Statistical properties of the network that corresponds to the 20-year long period of the Proceedings publishing are presented, as well as their interpretation and cross-references to similar networks that have been presented in the literature.
Search for sub-millicharged particles at J-PARC
Creators: name: Kim, Jeong Hwa
name: Hwang, In Sung
name: Yoo, Jae Hyeok
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We studied the feasibility of an experiment searching for sub-millicharged particles ($χ$s) using 30 GeV proton fixed-target collisions at J-PARC. The detector is composed of two layers of stacked scintillator bars and PMTs and is proposed to be installed 280 m from the target. The main background is a random coincidence between two layers due to dark counts in PMTs, which can be reduced to a negligible level using the timing of the proton beam. With $N_\textrm{POT}=10^{22}$ which corresponds to running the experiment for three years, the experiment provides sensitivity to $χ$s with the charge down to $5\times10^{-5}$ in $m_χ<0.2$ $\textrm{GeV}/\textrm{c}^2$ and $8\times10^{-4}$ in $m_χ<1.6$ $\textrm{GeV}/\textrm{c}^2$. This is the regime largely uncovered by the previous experiments. We also explored a few detector designs to achieve an optimal sensitivity to $χ$s. The photoelectron yield is the main driver, but the sensitivity does not have a strong dependence on the detector configuration in the sub-millicharge regime.
description: 11 pages, 3 figures. arXiv admin note: substantial text overlap with arXiv:2007.06329
Non-linear vector perturbations in a contracting universe
Creators: name: Mena, Filipe C.
name: Mulryne, David J.
name: Tavakol, Reza
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A number of scalar field models proposed as alternatives to the standard inflationary scenario involve contracting phases which precede the universe's present phase of expansion. An important question concerning such models is whether there are effects which could potentially distinguish them from purely expanding cosmologies. Vector perturbations have recently been considered in this context. At first order such perturbations are not supported by a scalar field. In this paper, therefore, we consider second order vector perturbations. We show that such perturbations are generated by first order scalar mode-mode couplings, and give an explicit expression for them. We compare the magnitude of vector perturbations produced in collapsing models with the corresponding amplitudes produced during inflation, using a number of suitable power-law solutions to model the inflationary and collapsing scenarios. We conclude that the ratios of the magnitudes of these perturbations depend on the details of the collapsing scenario as well as on how the hot big bang is recovered, but for certain cases could be large, growing with the duration of the collapse.
description: 16 pages, no figures
Probing the chiral weak Hamiltonian at finite volumes
Creators: name: Hernandez, P.
name: Laine, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Non-leptonic kaon decays are often described through an effective chiral weak Hamiltonian, whose couplings ("low-energy constants") encode all non-perturbative QCD physics. It has recently been suggested that these low-energy constants could be determined at finite volumes by matching the non-perturbatively measured three-point correlation functions between the weak Hamiltonian and two left-handed flavour currents, to analytic predictions following from chiral perturbation theory. Here we complete the analytic side in two respects: by inspecting how small ("epsilon-regime") and intermediate or large ("p-regime") quark masses connect to each other, and by including in the discussion the two leading Delta I = 1/2 operators. We show that the epsilon-regime offers a straightforward strategy for disentangling the coefficients of the Delta I = 1/2 operators, and that in the p-regime finite-volume effects are significant in these observables once the pseudoscalar mass M and the box length L are in the regime ML \lsim 5.0.
description: 37 pages. v2: some additions and clarifications; published version