cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Graph embeddings for Abusive Language Detection
Creators: name: Cecillon, Noé
name: Labatut, Vincent
name: Dufour, Richard
name: Linares, Georges
Publisher: name: arXiv
Year: 2021
Subjects: subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: Abusive behaviors are common on online social networks. The increasing frequency of antisocial behaviors forces the hosts of online platforms to find new solutions to address this problem. Automating the moderation process has thus received a lot of interest in the past few years. Various methods have been proposed, most based on the exchanged content, and one relying on the structure and dynamics of the conversation. It has the advantage of being languageindependent, however it leverages a hand-crafted set of topological measures which are computationally expensive and not necessarily suitable to all situations. In the present paper, we propose to use recent graph embedding approaches to automatically learn representations of conversational graphs depicting message exchanges. We compare two categories: node vs. whole-graph embeddings. We experiment with a total of 8 approaches and apply them to a dataset of online messages. We also study more precisely which aspects of the graph structure are leveraged by each approach. Our study shows that the representation produced by certain embeddings captures the information conveyed by specific topological measures, but misses out other aspects.
Logics for Unranked Trees: An Overview
Creators: name: Libkin, Leonid
Publisher: name: arXiv
Year: 2006
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Databases (cs.DB)
subject: FOS: Computer and information sciences
subject: H.2.3; H.2.1; I.7; F.2.3; F.4.1; F.4.3

description: Labeled unranked trees are used as a model of XML documents, and logical languages for them have been studied actively over the past several years. Such logics have different purposes: some are better suited for extracting data, some for expressing navigational properties, and some make it easy to relate complex properties of trees to the existence of tree automata for those properties. Furthermore, logics differ significantly in their model-checking properties, their automata models, and their behavior on ordered and unordered trees. In this paper we present a survey of logics for unranked trees.
Medium resolution 2.3 micron spectroscopy of the massive Galactic open cluster Westerlund 1
Creators: name: Mengel, Sabine
name: Tacconi-Garman, Lowell E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Galactic open cluster Westerlund 1 was found only a few years ago to be much more massive than previously thought, with evidence suggesting its mass to be in excess of ~10^5 Msun, in the range spanned by young extragalactic star clusters. Unlike those clusters its proximity makes spatially resolved studies of its stellar population feasible. It is therefore the ultimate template for a young, massive star cluster, permitting direct comparison of its properties with measurements of velocity dispersion and dynamical mass for spatially unresolved extragalactic clusters. To this end, we used the long slit near-infrared spectrograph VLT/ISAAC to observe the CO bandhead region near 2.29 micron scanning the slit across the cluster centre during the integration. Spatially collapsing the spectra along the slit results in a single co-added spectrum of the cluster, comparable to what one would obtain in the extragalactic cluster context. This spectrum was analysed the same way as the spectra of almost point-like extragalactic clusters, using red superiant cluster members as velocity templates. We detected four red supergiants which are included in the integrated spectrum, and our measured velocity dispersion is 5.8 km/s. Together with the cluster size of 0.86 pc, derived from archival near-infrared SOFI-NTT images, this yields a dynamical mass of 6.3x10^4 Msun. While this value is not to be considered the final word, there is at least so far no sign for rapid expansion or collapse.
description: 6 pages, 5 figures, A&A accepted
Η συμφωνία συνδιαλλαγής κατά τις διατάξεις του νέου Πτωχευτικού Κώδικα:
Creators: name: Ευθυμίου, Γεωργία-Αγάπη Ευθυμίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Διαδικασία
Συνδιαλλαγή
Πτώχευση
Procedure
Conciliation
Bankruptcy

description: Σκοπός της διατριβής ήταν η μελέτη της «διαδικασίας συνδιαλλαγής», η οποία εισήχθη με το νέο Πτωχευτικό Κώδικα, ως ένα από τα πλέον κρίσιμα μέτρα για τη διάσωση επιχειρήσεων σε προπτωχευτικό επίπεδο. Η διαδικασία συνδιαλλαγής, χωρίς προηγούμενο πρότυπο στο ισχύον δίκαιο, έλαβε υπόψη το νεότερο γαλλικό θεσμό της procedure de conciliation και συνδυάζει τις συμβατικές ρυθμίσεις πιστωτών και οφειλέτη, ως συλλογική διαδικασία σε συμβατικό και δικαστικό πλαίσιο, προβλέπεται δε ότι θα δώσει στους οφειλέτες, πριν φτάσουν σε κατάσταση παύσης των πληρωμών, τη δυνατότητα αναζήτησης νέων χρηματικών μέσων για την ανόρθωση των επιχειρήσεών τους. Η δυνατότητα αυτή παρέχεται σε κάθε οφειλέτη, που θα πληρούσε τις υποκειμενικές προϋποθέσεις της πτώχευσης. Εξετάσαμε τη νομική φύση και τις προϋποθέσεις υπαγωγής στη διαδικασία συνδιαλλαγής. Στη συνέχεια παρουσιάσαμε τη συμφωνία συνδιαλλαγής και ειδικότερα τους όρους σύναψης της, το συμβατικό χαρακτήρα της, τον τύπο και το περιεχόμενό της. Τέλος, αναφερθήκαμε αναλυτικά στην τριπλή παρέμβαση του δικαστηρίου στη διαδικασία συνδιαλλαγής: κατά το άνοιγμα της διαδικασίας, κατά την επικύρωση της συμφωνίας και κατά τη λύση της συμφωνίας λόγω μη εκπλήρωσης των όρων της. Ένα άλλο θέμα που θίξαμε ήταν η δυνατότητα συμμετοχής το Δημοσίου στη διαδικασία συνδιαλλαγής.
description: The purpose of this study was to examine the “procedure of conciliation”, which was introduced with the new Bankruptcy Code, as one of the most critical steps to rescue an enterprise facing financial problems. The procedure of conciliation, took note of the latest French institution of the “procedure de conciliation” and combines arrangements between creditors and debtors, as a collective procedure with contractual and legal obligations. This procedure will give borrowers the ability to search for new financial resources to rebuild their businesses, before they reach a state of cessation of payments. This option is provided to each debtor, who fulfils the subjective conditions of bankruptcy. We examined the legal status and the prerequisites of this procedure. Then we presented the conciliation agreement and in particular the conditions, the contractual nature, its form and content. Finally, we analyzed the triple intervention of the court in the conciliation procedure: during the opening process, in the ratification of the agreement and the termination of the agreement due to non fulfilment of its conditions. Another issue we discussed was the state’s possibility to participate in the procedure of conciliation.
On the applicability of the level set method beyond the flamelet regime in thermonuclear supernova simulations
Creators: name: Schmidt, W.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In thermonuclear supernovae, intermediate mass elements are mostly produced by distributed burning provided that a deflagration to detonation transition does not set in. Apart from the two-dimensional study by Roepke & Hillebrandt (2005), very little attention has been payed so far to the correct treatment of this burning regime in numerical simulations. In this article, the physics of distributed burning is reviewed from the literature on terrestrial combustion and differences which arise from the very small Prandtl numbers encountered in degenerate matter are pointed out. Then it is shown that the level set method continues to be applicable beyond the flamelet regime as long as the width of the flame brush does not become smaller than the numerical cutoff length. Implementing this constraint with a simple parameterisation of the effect of turbulence onto the energy generation rate, the production of intermediate mass elements increases substantially compared to previous simulations, in which the burning process was stopped once the mass density dropped below 10^7 g/cm^3. Although these results depend on the chosen numerical resolution, an improvement of the constraints on the the total mass of burning products in the pure deflagration scenario can be achieved.
description: 8 pages, 5 figures. Accepted for publication in Astron. & Astrophys
Molecular and genetic analyses of the Bel1 gene regulating ovule development in Arabidopsis thaliana
Creators: name: Modrusan, Zora
Publisher: name: University of British Columbia
Year: 2009

description: Phenotypic characterization of the Arabidopsis thaliana mutant Bel1 revealed numerous morphological abnormalities of Bel1 ovules, including the absence of the inner integuments, homeotic transformation of the outer integuments into carpel-like structures, and incomplete development of the female gametophytes. The homeotic transformation of outer integuments into carpelloid structures in Bel1 has been correlated with abnormal expression of class C gene expression in the Arabidopsis ovule. Both direct and indirect evidence established such correlation: first, transcripts of AGAMOUS, the only class C gene identified to date, were detected throughout Bel1 ovules at the time of formation of carpel-like structures and second, the highest frequency of carpel-like structures was found in Bel1 plants grown under environmental conditions that also stimulate class C function. These data suggested that the BEL1 product functions as a negative regulator of AG during ovule development. Similar to Bel1, occasional transformation of ovules into structures with carpelloid features occurs in Ap2-6 mutant plants, indicating a role of the APETALA2 gene in ovule development not previously described. AP2 function during early Arabidopsis flower development is to suppress AG in the outermost whorls. My data suggests that AP2 functions in a similar manner during ovule development. Two mutant alleles, bel1-2 and bel1-3, originate from Agrobacterium T-DNA mutagenized populations of Arabidopsis and both of them are due to T-DNA insertions into the BEL1 locus. Genomic sequences adjacent to the T-DNA insert in the bel1-2 were used to isolate the putative BEL1 gene (L. Reiser and R. Fischer, unpublished data). The identity of the cloned BEL1 sequence was confirmed by cloning the bel1-3 allele and demonstrating that the T-DNA lies within putative BEL1 gene and by complementation of the Bel1 mutant phenotype with the cloned sequence. Characterization of the BEL1 gene revealed its amino acid sequence identity to DNA binding domain of the homeobox family of transcription factors, suggesting that the BEL1 protein itself may function as a transcriptional regulator. The search for genes homologous to BEL1 resulted in identification of three new homeobox genes, ABH1, ABH2, and ABH3. Together with BEL1, these three genes define a novel homeobox gene subfamily in Arabidopsis.
Instanton test of non-supersymmetric deformations of the AdS_5 x S^5
Creators: name: Durnford, Callum
name: Georgiou, George
name: Khoze, Valentin V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider instanton effects in a non-supersymmetric gauge theory obtained by marginal deformations of the N=4 SYM. This gauge theory is expected to be dual to type IIB string theory on the AdS_5 times deformed-S^5 background. From an instanton calculation in the deformed gauge theory we extract the prediction for the dilaton-axion field τin dual string theory. In the limit of small deformations where the supergravity regime is valid, our instanton result reproduces the expression for τof the supergravity solution found by Frolov.
description: 15 pages
Infinite Ergodicity that Preserves the Lebesgue Measure
Creators: name: Okubo, Ken-ichi
name: Umeno, Ken
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We proved that for the countably infinite number of one-parameterized one dimensional dynamical systems, they preserve the Lebesgue measure and they are ergodic for the measure (infinite ergodicity). Considered systems connect the parameter region in which dynamical systems are exact and the parameter region in which systems are dissipative, and correspond to the critical points of the parameter in which weak chaos occurs (the Lyapunov exponent converges to zero). These results are the generalization of the work by R. Adler and B. Weiss. We show that the distributions of normalized Lyapunov exponent for these systems obey the Mittag-Leffler distribution of order $1/2$ by numerical simulation.
Επίδραση της θερμοκρασίας και του φωτός στη φύτρωση των σπερμάτων των Erysimum naxense Snogerup και Erysimum krendlii Polatschek:
Creators: name: Γκίκα, Παρασκευή Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Φύτρωση σπερμάτων
Θερμοκρασία
Φως
Seed germination
Temperature
Light

description: Μελετάται η επίδραση της θερμοκρασίας και του φωτός στη φύτρωση των σπερμάτων των ενδημικών ειδών Erysimum naxense Snogerup και E. krendlii Polatschek με σκοπό την ανάπτυξη μεθόδων πολλαπλασιασμού. Τα σπέρματα που χρησιμοποιήθηκαν για την διεξαγωγή των πειραμάτων προέρχονταν από τη τράπεζα γενετικού υλικού (τράπεζα σπερμάτων) του εργαστηρίου Προστασίας και Αξιοποίησης Αυτοφυών και Ανθοκομικών Ειδών (ΕΘ.Ι.ΑΓ.Ε.). Η βιωσιμότητα των σπερμάτων εκτιμήθηκε, πριν την έναρξη των πειραμάτων, με τη μέθοδο του τετραζολίου. Η φυτρωτική ικανότητα των σπερμάτων διερευνήθηκε σε συγχρονισμένους κύκλους πέντε (5) και τεσσάρων (4) εναλλασσόμενων θερμοκρασιών για το E. naxense και το E. krendlii αντίστοιχα και σε πέντε (5) ποιότητες φωτός (κόκκινο, μπλε, πράσινο, λευκό και σκοτάδι). Υπολογίστηκε το ποσοστό και ο ρυθμός φύτρωσης (Τ50) των σπερμάτων. Το ποσοστό και ο ρυθμός φύτρωσης των σπερμάτων των ειδών E. naxense και E. krendlii ήταν μεγαλύτερο σε χαμηλές εναλλασσόμενες θερμοκρασίες (10/5 οC και 15/10 οC). Η φύτρωση των σπερμάτων του E. naxense δεν επηρεάστηκε από το φως (κόκκινο, μπλε, πράσινο, λευκό, σκοτάδι) στις χαμηλές θερμοκρασίες, αλλά στις υψηλές αυξήθηκε με το κόκκινο φως. Ωστόσο, η φύτρωση των σπερμάτων του E. krendlii δεν επηρεάστηκε από το φως (κόκκινο, μπλε, πράσινο, λευκό και σκοτάδι) σε όλες τις θερμοκρασίες. δεν διαπιστώθηκε ενδογενής λήθαργος στα σπέρματα των δύο ειδών.
description: The effect of temperature and light on seed germination of the endemic species Erysimum naxense Snogerup and E. krendlii Polatschek was investigated to develop propagation methods for ex situ conservation. The seeds used in the experiments were supplied by the gene bank (seed bank) of the Laboratory of Conservation and Evaluation of Native and Floricultural Crops, National Agricultural Research Foundation. Seed viability was estimated by the tetrazolium method (TTC test). Seed germination was studied in synchronized cycles of five (5) and four (4) alternating temperatures for E. naxense and E. krendlii respectively, and five (5) light regimes (red, blue, green, white and dark). Percentage and rate of germination (T50) of seeds was estimated. Percentage and rate of germination of E.naxense and E. krendlii increased at low alternating temperatures (10/5 °C and 15/10 °C). Seed germination of E. naxense at low temperatures was light independent at all light regimes (red, blue, green, white and dark), whereas at high temperatures seed germination (%) increased with red light. However, seed germination of E. krendlii was not affected by light at any of the temperatures studied. Innate dormancy was not observed in either of the two species.
Time Evolving Social Networks' Overview:
Creators: name: Στάχτιαρη, Εμμανουέλα Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Κοινωνικά δίκτυα
Εξελισσόμενα δίκτυα
Οπτικοποίηση γράφου
Social Networks
Evolving Networks
Graph Visualization

description: Η παρούσα διπλωματική στοχεύει σε δύο θέματα: αφενός πραγματεύεται την ανάπτυξη μιας τεχνικής για την παρακολούθηση και τον χαρακτηρισμό αλλαγών σε μεγάλα κοινωνικά δίκτυα με τεχνικές γράφου, αφετέρου προτείνει ένα πλαίσιο παρουσίασης αυτής της πληροφορίας με τρόπο που αναδεικνύει την ύπαρξη ομάδων, ως "θεματικές". Η τεχνική παρακολούθησης της εξέλιξης συνίσταται στην εύρεση κρίσιμων γεγονότων που σχετίζονται με τις ομάδες και τη συμπεριφορά των κόμβων. Στη συνέχεια χρησιμοποιούμε κατάλληλους στατιστικούς "δείκτες" για να βγάλουμε χρήσιμα συμπεράσματα από τα γεγονότα σχετικά με το ρόλο των κόμβων και των ομάδων στο κοινωνικό δίκτυο. Η παρουσίαση των θεματικών του δικτύου, γίνεται με την οπτικοποίηση του γράφου που σχηματίζουν οι πιο χαρακτηριστικοί κόμβοι των ομάδων. Για την οπτική ανάδειξη των ομάδων, υλοποιήσαμε έναν αλγόριθμο που επεκτείνει force-directed τεχνικές και ενσωματώνει ένα μέτρο ομοιότητας των κόμβων, που βασίζεται στις ομάδες που ανήκουν.
description: This master's thesis has a two-fold target. In the first part, it examines a method for tracking and characterizing evolution in big social networks with graph techniques. In the second part, it suggests a framework for the presentation of such evolutionary information, in a way that it would highlight the community structure. The method of tracking the evolutionary behavior of the network consists of the detection of critical events, which are related to the behavior of communities and vertices. In the process, we use appropriate statistical indices to make inferences from the events concerning the role of communities and vertices. In order to visualize representative objects and objects that are descriptors of each topic of interest, we implement a method, which generates a graph built on the most representative objects of the communities, or “worlds”. In the frame of visualization, we propose a graph drawing algorithm, which extends existing force-directed techniques and incorporates a measure of similarity between vertices based on their community membership.
Artificial Intelligence enabled Smart Learning
Creators: name: Khan, Faisal
name: Bose, Debdeep
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Artificial Intelligence (AI) is a discipline of computer science that deals with machine intelligence. It is essential to bring AI into the context of learning because it helps in analysing the enormous amounts of data that is collected from individual students, teachers and academic staff. The major priorities of implementing AI in education are making innovative use of existing digital technologies for learning, and teaching practices that significantly improve traditional educational methods. The main problem with traditional learning is that it cannot be suited to every student in class. Some students may grasp the concepts well, while some may have difficulties in understanding them and some may be more auditory or visual learners. The World Bank report on education has indicated that the learning gap created by this problem causes many students to drop out (World Development Report, 2018). Personalised learning has been able to solve this grave problem.
description: 4
Archival searches for stellar-mass binary black holes in LISA
Creators: name: Ewing, Becca
name: Sachdev, Surabhi
name: Borhanian, Ssohrab
name: Sathyaprakash, B. S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Stellar-mass binary black holes will sweep through the frequency band of the Laser Interferometer Space Antenna (LISA) for months to years before appearing in the audio-band of ground-based gravitational-wave detectors. One can expect several tens of these events up to a distance of $500 \,\mathrm{Mpc}$ each year. The LISA signal-to-noise ratio for such sources even at these close distances will be too small for a blind search to confidently detect them. However, next generation ground-based gravitational-wave detectors, expected to be operational at the time of LISA, will observe them with signal-to-noise ratios of several thousands and measure their parameters very accurately. We show that such high fidelity observations of these sources by ground-based detectors help in archival searches to dig tens of signals out of LISA data each year.
description: 12 pages, 7 figures
Stochastic limit-cycle oscillations of a nonlinear system under random perturbations
Creators: name: Cheng, Yu-Chen
name: Qian, Hong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Dynamical systems with $ε$ small random perturbations appear in both continuous mechanical motions and discrete stochastic chemical kinetics. The present work provides a detailed analysis of the central limit theorem (CLT), with a time-inhomogeneous Gaussian process, near a deterministic limit cycle in $\mathbb{R}^n$. Based on the theory of random perturbations of dynamical systems and the WKB approximation respectively, results are developed in parallel from both standpoints of stochastic trajectories and transition probability density and their relations are elucidated. We show rigorously the correspondence between the local Gaussian fluctuations and the curvature of the large deviation rate function near its infimum, connecting the CLT and the large deviation principle of diffusion processes. We study uniform asymptotic behavior of stochastic limit cycles through the interchange of limits of time $t\to\infty$ and $ε\to 0$. Three further characterizations of stochastic limit cycle oscillators are obtained: (i) An approximation of the probability flux near the cycle; (ii) Two special features of the vector field for the cyclic motion; (iii) A local entropy balance equation along the cycle with clear physical meanings. Lastly and different from the standard treatment, the origin of the $ε$ in the theory is justified by a novel scaling hypothesis via constructing a sequence of stochastic differential equations.
Οι αυτοπαθητικές αντωνυμίες σε ιστορικά κείμενα της ύστερης ελληνιστικής περιόδου.:
Creators: name: Κλείδωνα, Ευγενία Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Αυτοπαθητικές αντωνυμίες
Μορφολογία
Σύνταξη
Reflexive pronouns
Morphology
Syntax

description: Η διπλωματική αυτή εργασία έχει ως αντικείμενό της τη μορφολογική και συντακτική περιγραφή των αυτοπαθητικών αντωνυμιών που εμφανίζονται σε κείμενα της ύστερης ελληνιστικής περιόδου. Αρχικός στόχος στο επίπεδο της μορφολογίας είναι μια γενική στατιστική παρουσίαση των δεδομένων όσον αφορά α) το θέμα της αντωνυμίας β) τον αριθμό, γ) το πρόσωπο και δ) την πτώση, ενώ στο επίπεδο της σύνταξης εξετάζουμε το είδος της φράσης στην οποία εμφανίζεται η αυτοπαθητική αντωνυμία, η απόσταση από τον όρο στον οποίο αναφέρεται (αν δηλαδή αυτός εμφανίζεται στην ίδια φράση με την αυτοπαθητική αντωνυμία ή σε διαφορετική) και βεβαίως η συντακτική θέση της αντωνυμίας. Εκτός από τη γενική περιγραφή η εργασία αυτή εστιάζει και σε κάποια πιο συγκεκριμένα ζητήματα, όπως τη χρήση των τριτοπρόσωπων μονολεκτικών τύπων για το α’ και β’ πρόσωπο και την ενδεχόμενη διαφορετική χρήση των διαφορετικών θεμάτων των μονολεκτικών τύπων του γ’ προσώπου. Τέλος, ιδιαίτερη έμφαση δίνεται στο ζήτημα της κατανομής των αντωνυμιών, έτσι όπως αυτή καθορίζονται τόσο από την παραδοσιακή γραμματική όσο και τη σύγχρονη γενετική μετασχηματιστική γραμματική, και συγκεκριμένα από τη Θεωρία της Αναφορικής Δέσμευσης. Έτσι, ένας ακόμα στόχος της συντακτικής εξέτασης είναι να διερευνηθεί κατά πόσο τα δεδομένα μας υπακούουν στις αρχές της Θεωρίας της Αναφορικής Δέσμευσης.
description: This thesis is concerned with the morphological and syntactic analysis of the reflexive pronouns found in historical texts of the late Hellenistic period. The primary aim of the morphological analysis is a statistic presentation of the data concerning a) the morphology of the pronoun theme, b) number, c) person and d) case, while on the syntactic level we examine the phrase type that the pronoun can be found in, the distance from the antecedent and the syntactic position of the reflexive pronouns. Apart from this general analysis, we focus on some issues, like the use of the third person types for the first and second person and the different use that the different types of the third person reflexive might present. Finally, we examine some distribution issues as they are approached both by the traditional grammar and modern linguistic theories, like Binding Theory.
Exclusive radiative production of fully-charmed tetraquarks at $B$ Factory
Creators: name: Feng, Feng
name: Huang, Yingsheng
name: Jia, Yu
name: Sang, Wen-Long
name: Zhang, Jia-Yue
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We apply the newly developed NRQCD factorization formula to analyze the exclusive production of the fully-charmed tetraquark $T_{4c}$ plus a hard photon at $B$ factory. For simplicity, in this work we have concentrated on the associated production of the $0^{++}$ and $2^{++}$ tetraquarks with a photon. With some rough estimates about the size of the unknown nonperturbative NRQCD matrix elements, we predict the production rates of these types of exclusive channels at $\sqrt{s}=10.6$ GeV and also assess their observation prospect at {\tt Belle 2} experiment.
description: 11 pages, 3 figures
Gomphus assimilis Schneider 1854
Creators: name: Hagen, H.
Publisher: name: Zenodo
Year: 1863
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Odonata
Gomphidae
Gomphus
Gomphus assimilis

description: 21. G. assimilis Schneid.
Kellemisch in Kleín-Asien.
description: Published as part of Hagen, H., 1863, Die Odonaten- und Nenropteren-Fauna Syriens und Klein-Asiens, pp. 193-199 in Wiener Entomologische Monatschrift 7 on page 196, DOI: 10.5281/zenodo.3528093
Neutrino production in Population III microquasars
Creators: name: Carulli, Agustín M.
name: Reynoso, Matías M.
name: Romero, Gustavo E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Microquasars (MQs) are binary systems composed by a star feeding mass to a compact object through an accretion disk. The compact object, usually a black hole, launches oppositely directed jets which are typically observed in our galaxy through their broadband electromagnetic emission. These jets are considered potential galactic neutrino sources. MQs can also have been formed by the first generations of stars in the universe, i.e., Population III (Pop III) stars, which are considered essential contributors to the ionization processes that took place during the period of 'cosmic reionization'. In the present work, we develop a model that accounts for the main particle processes occurring within Pop III MQ jets, with the aim to obtain the diffuse neutrino flux at the Earth [...] We find that, for a range of parameters suitable for Pop III MQ jets, the most relevant site for neutrino production in the jets is the base of the inner conical jet. Additionally, if protons accelerated at the forward shock formed at terminal jet region can escape from the outer shell, they would produce further neutrinos via $pγ$ interactions with the cosmic microwave background (CMB). The latter contribution to the diffuse neutrino flux turns out to be dominant in the range $10^7 {\rm GeV} \lesssim E_ν \lesssim 10^9 {\rm GeV}$, while the neutrinos produced in the inner jet could only account for a small fraction of the IceCube flux for $E_ν\sim 10^5$ GeV. The co-produced multiwavelength photon background is also computed and it is checked to be in agreement with observations.
description: 20 pages, 13 figures, accepted for publication in Astroparticle Physics
Gomphus flexuosus Schneider 1854
Creators: name: Hagen, H.
Publisher: name: Zenodo
Year: 1863
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Odonata
Gomphidae
Gomphus
Gomphus flexuosus

description: 22. G. flexuosus Schneid.
Kelleınisch in Klein-Asien, Elisabethopol im Caucasus.
description: Published as part of Hagen, H., 1863, Die Odonaten- und Nenropteren-Fauna Syriens und Klein-Asiens, pp. 193-199 in Wiener Entomologische Monatschrift 7 on page 196, DOI: 10.5281/zenodo.3528093
Προγραμματισμός, ανάγωγα, πολυώνυμα και αυτομορφισμοί:
Creators: name: Γουνιώτης, Νικόλαος Ελευθερίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Ανάγωγο πολυώνυμο
Τάξη πολυωνύμου
Προγράμματα ανάγωγων πολυωνύμων
Irreducible polynomial
Order of a polynomial
Programs of irreducible polynomial

description: Σκοπός της παρούσας διπλωματικής εργασίας είναι η ανάλυση του Λήμματος της εργασίας του Α. Ι. Πάπιστα με τίτλο “Non-tame automorphisms of a free group of rank in , Glasgow Math. J.49 (2007) 449-467.” με την βοήθεια Η/Υ. Δημιουργώντας δέκα προγράμματα για την κατασκευή άπειρων ανάγωγων πολυωνύμων.Η κατασκευή άπειρων ανάγωγων πολυωνύμων χρησιμοποιείται για την κατασκευή non-tame αυτομορφισμών της σχετικά ελεύθερης ομάδας βαθμίδας στην πολλαπλότητα ομάδων με πρώτο αριθμό ( Θεώρημα ).Καθώς και την απόδειξη ότι σε κάθε πεπερασμένο σώμα χαρακτηριστικής p, όπου p πρώτος αριθμός, υπάρχει ένα τουλάχιστον ανάγωγο πολυώνυμο. Το κίνητρο είναι ότι σε σώματα με μεγάλη χαρακτηριστική η απόδειξη αυτήν είναι πολύ χρονοβόρα ενώ με την χρήση του υπολογιστή ο χρόνος εκμηδενίζεται. Στο κεφάλαιο ορίζουμε την τάξη ενός πολυωνύμου. Στο αναφέρουμε κάποιες ιδιότητες των ανάγωγων πολυωνύμων. Στο επόμενο κατασκευάζουμε ανάγωγα πολυώνυμα γνωρίζοντας ένα. Στην συνέχεια στο κεφάλαιο αναφέρεται σε μια ιδιότητα των διωνύμων. Όλα αυτά χρησιμοποιούνται στην απόδειξη των αλγορίθμων παραγωγής ανάγωγων πολυωνύμων στο κεφάλαιο και στο τελευταίο κεφάλαιο παραθέτονται τα προγράμματα που δημιουργήθηκαν για αυτόν τον σκοπό.
description: The aim of this dissertation is the analysis of the Lemma of A. I. Papista’s project titled “Non-tame automorphisms of a free group of rank in, Glasgow Math. J.49 (2007) 449-467.” with the help of P/C. Creating ten programs for the constructing of infinite irreducible polynomial. The construction of infinite irreducible polynomials is used for the construction non-tame automorphisms of the free group rank in the variety of groups where prime number ( theorem). As well as to prove that in every finite field of characteristic p, where p is an prime number, there is at least one irreducible polynomial. The motive is that in fields where the characteristic is too big, the proof of this thing is too time-consuming while by using the computer the time is reduced to the minimum. In the section we define the order of a polynomial. In the we repost some properties of irreducible polynomials. In the next we construct irreducible polynomials, as long as we know one. Then the section is about a property of binomials. In the section all the above are used to prove the algorithm production of irreducible polynomials and in the last paragraph we present the programs which we have created for this purpose.
Gomphus pumilio Rambur 1842
Creators: name: Hagen, H.
Publisher: name: Zenodo
Year: 1863
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Odonata
Gomphidae
Gomphus
Gomphus pumilio

description: 23. G. pumilio Rbr.
 Syrien. (Lederer). In Afrika in Egypten und Abyssinien. Ich ﬁnde unter meinen alten Noten auch G. Genei aus Syrien (Mus. Berol.) angegeben. Vielleicht ist diess doch _ eine Verwechslung mit G. pumilio.
description: Published as part of Hagen, H., 1863, Die Odonaten- und Nenropteren-Fauna Syriens und Klein-Asiens, pp. 193-199 in Wiener Entomologische Monatschrift 7 on page 196, DOI: 10.5281/zenodo.3528093
Schwarzschild black hole and the generalized second law in phantom-dominated universe
Creators: name: Sadjadi, H. Mohseni
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the conditions required for validity of the generalized second law in phantom dominated universe in the presence of Schwarzschild black hole. Our study is independent of the origin of the phantom like behavior of the considered universe. We also discuss the generalized second law in the neighborhood of transition (from quintessence to phantom regime) time. We show that even for a constant equation of state parameter the generalized second law may be satisfied provided the temperature is not taken as de Sitter temperature. It is shown that in models with (only) a transition from quintessence to phantom regime the generalized second law does not hold in the transition epoch.
description: 10 pages, references added, typos corrected, accepted for publication in Physics Letters B
Microstructural Changes Influencing the Magnetoresistive Behavior of Bulk Nanocrystalline Materials
Creators: name: Wurster, Stefan
name: Stueckler, Martin
name: Weissitsch, Lukas
name: Mueller, Timo
name: Bachmaier, Andrea
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Bulk nanocrystalline materials of small and medium ferromagnetic content were produced using severe plastic deformation by high-pressure torsion at roomtemperature. Giant magnetoresistive behavior was found for as deformed materials, which was further improved by adjusting the microstructure with thermal treatments. The adequate range of annealing temperatures was assessed with in-situ synchrotron diffraction measurements. Thermally treated CuCo materials show larger giant magnetoresistance after annealing for 1 h at 300C, while for CuFe this annealing temperature is too high and decreases the magnetoresistive properties. The improvement of magnetoresistivity by thermal treatments is discussed with respect to the microstructural evolution as observed by electron microscopy and ex situ synchrotron diffraction measurements.
Cordulegaster annulatus Selys 1843
Creators: name: Hagen, H.
Publisher: name: Zenodo
Year: 1863
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Odonata
Cordulegastridae
Cordulegaster
Cordulegaster annulatus

description: 25. C. bidentatus Selys.
Klein-Asien, Brussa (Mus. Vienn.) Süd- und Mittel-Europa.
description: Published as part of Hagen, H., 1863, Die Odonaten- und Nenropteren-Fauna Syriens und Klein-Asiens, pp. 193-199 in Wiener Entomologische Monatschrift 7 on page 196, DOI: 10.5281/zenodo.3528093
Twisted semilocal strings in the MSSM
Creators: name: Brihaye, Y.
name: Honorez, L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The standard electroweak model is extended by means of a second Brout-Englert-Higgs-doublet. The symmetry breaking potential is chosen is such a way that (i) the Lagrangian possesses a custodial symmetry, (ii) a stationary, axially symmetric ansatz of the bosonic fields consistently reduces the Euler-Lagrange equations to a set of differential equations. The potential involves, in particular, a direct interaction between the two doublets. Stationary, axially-symmetric solutions of the classical equations are constructed. Some of them can be assimilated to embedded Nielsen-Olesen strings. From these solutions there are bifurcations and new solutions appear which exhibit the characteristics of the recently constructed twisted semilocal strings. A special emphasis is set on "doubly-twisted" solutions for which the two doublets present different time-dependent phase factors. They are regular and have a finite energy which can be lower than the energy of the embedded twisted solution. Electric-type solutions, such that the fields oscillate asymptotically far from the symmetry-axis, are also reported.
description: 17 pages, 11 figures, discussion extended, new solutions obtained
Relational interpretation of the wave function and a possible way around Bell's theorem
Creators: name: Filk, Thomas
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The famous ``spooky action at a distance'' in the EPR-szenario is shown to be a local interaction, once entanglement is interpreted as a kind of ``nearest neighbor'' relation among quantum systems. Furthermore, the wave function itself is interpreted as encoding the ``nearest neighbor'' relations between a quantum system and spatial points. This interpretation becomes natural, if we view space and distance in terms of relations among spatial points. Therefore, ``position'' becomes a purely relational concept. This relational picture leads to a new perspective onto the quantum mechanical formalism, where many of the ``weird'' aspects, like the particle-wave duality, the non-locality of entanglement, or the ``mystery'' of the double-slit experiment, disappear. Furthermore, this picture cirumvents the restrictions set by Bell's inequalities, i.e., a possible (realistic) hidden variable theory based on these concepts can be local and at the same time reproduce the results of quantum mechanics.
description: Accepted for publication in "International Journal of Theoretical Physics"
The nuclear to host galaxy relation of high redshift quasars
Creators: name: Kotilainen, J. K.
name: Falomo, R.
name: Labita, M.
name: Treves, A.
name: Uslenghi, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present near-infrared imaging with ESO VLT+ISAAC of the host galaxies of low luminosity quasars in the redshift range 1 < z < 2, aimed at investigating the relationship between the nuclear and host galaxy luminosities at high redshift. This work complements our previous study to trace the cosmological evolution of the host galaxies of high luminosity quasars (Falomo et al. 2004). The new sample includes 15 low luminosity quasars, nine radio-loud (RLQ) and six radio-quiet (RQQ). They have similar distribution of redshift and optical luminosity, and together with the high luminosity quasars they cover a large range (~4 mag) of the quasar luminosity function. The host galaxies of both types of quasars are in the range of massive inactive ellipticals between L* and 10 L*. RLQ hosts are systematically more luminous than RQQ hosts by a factor of ~2. This difference is similar to that found for the high luminosity quasars. This luminosity gap appears to be independent of the rest-frame U-band luminosity but clearly correlated with the rest-frame R-band luminosity. The color difference between the RQQs and the RLQs is likely a combination of an intrinsic difference in the strength of the thermal and nonthermal components in the SEDs of RLQs and RQQs, and a selection effect due to internal dust extinction. For the combined set of quasars, we find a reasonable correlation between the nuclear and the host luminosities. This correlation is less apparent for RQQs than for RLQs. If the R-band luminosity is representative of the bolometric luminosity, and assuming that the host luminosity is proportional to the black hole mass, as observed in nearby massive spheroids, quasars emit with a relatively narrow range of power with respect to their Eddington luminosity and with the same distribution for RLQs and RQQs.
description: Accepted for publication in ApJ, 24 pages, 4 figures
An empirical model of exceptional teaching
Creators: name: Mitchell, Jeffrey Lorne
Publisher: name: University of British Columbia
Year: 2009

description: Ideas from philosophy, developmental psychology, cognitive psychology, and teacher education are molded into a description of exceptional teaching. Especially important for establishing a model of exceptional teaching is Habermas's (1970) theory of knowledge-constitutive interests. Specifically, Habermas's three knowledgeconstitutive interests (technical, practical, and emancipatory) are expected to define wisdom in teaching. By adopting technical, practical, and emancipatory knowledge as the basis for a model of exceptional teaching this study will extend some current descriptions of exceptional teaching (i.e., Berliner, 1986) that define exceptional teaching as expertise. Evidence for this conclusion stems from the results of a principal components analysis on respondents' ratings of descriptors of "wise" teaching, as compared to the results from a principal components analysis on respondents' ratings of descriptors of "expert" teaching. Wise teaching seems to involve all three of Habermas's ways of knowing, whereas, "expert" teaching involves practical and especially technical ways of knowing. Therefore, the difference between "wise" and "expert" teaching seems to be in what Habermas has called emancipatory knowing. A second set of findings supports the above findings by showing that teachers hypothesized to be closer to the prototype of a wise teacher (department heads) utilize their "wisdom" in response to two general questions about education; whereas, a sample of teachers who were not department heads and a sample of student teachers do not utilize these three ways of knowing to the same extent. The difference between the three samples of teachers was primarily in the use of emancipatory knowledge by the department heads. In a third set of findings a teacher hypothesized to be "wise" was observed to determine whether or not Habermas's three ways of knowing were evident in her teaching practice. This was found to be the case. The general conclusion from the present study is that a comprehensive description of exceptional teaching seems to be possible based upon people's everyday conceptions of what it means to be a "wise" teacher. Thus, an empirical model is provided for future research on exceptional teaching. This empirical model seems to best fit into a developmental framework based on constructivism because the essence of constructivist descriptions of exceptional teachers (e.g., Arlin, 1993; Lee, 1993; Prawat 1992) correspond closely with the present description of exceptional teachers.
Διαφορές στην οικοφυσιολογία του Pinus halepensis Miller subsp. halepensis και ειδών του υπορόφου:
Creators: name: Τσιόγκα, Βασιλική Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Υδατική καταπόνηση
Υδατικές σχέσεις
Μεσογειακά είδη
Water stress
Plant water relations
Meditterranean species

description: Στην παρούσα εργασία μελετήθηκαν οι υδατικές σχέσεις τριών ειδών που συνυπάρχουν στη λεκάνη της Μεσογείου: Pinus halepensis Miller subsp. halepensis, Quercus coccifera L. και Pistacia lentiscus L. κατά τη διάρκεια της θερμής περιόδου 2010 στο Δάσος Σταυρονικήτα Χαλκιδικής. Μετρήθηκαν το υδατικό δυναμικό, το ωσμωτικό δυναμικό σε σπαργή, το περιεχόμενο νερό και ο δείκτης περιεχόμενης χλωροφύλλης φύλλων. Το υδατικό δυναμικό παρέμεινε υψηλό κατά την περίοδο των μετρήσεων και για τα τρία είδη, πιθανώς λόγω της σχετικά υψηλής βροχόπτωσης. Δεν παρατηρήθηκε εποχιακή μεταβολή στο ωσμωτικό δυναμικό σε σπαργή σε κανένα είδος. Το περιεχόμενο νερό ήταν υψηλό και δε σημειώθηκε σημαντική μείωση κατά τη θερμή περίοδο, απόκριση χαρακτηριστική των ειδών που αντέχουν στην έλλειψη ύδατος. Κατά τη θερμή περίοδο παρατηρήθηκε μεταβολή του δείκτη περιεχόμενης χλωροφύλλης και στα τρία είδη. Οι υψηλότερες τιμές του δείκτη περιεχόμενης χλωροφύλλης παρατηρήθηκαν στα δύο είδη αειφύλλων πλατυφύλλων. Οι διαφορές που παρατηρήθηκαν στις φυσιολογικές παραμέτρους μεταξύ των ειδών σχετίζονται περισσότερο με την απόκριση τους στην ηλιακή ακτινοβολία και όχι στην υδατική καταπόνηση, δεδομένου ότι η εδαφική διαθεσιμότητα νερού ήταν υψηλή κατά την περίοδο μελέτης.
description: In the present study we investigated the water relations of the three Mediterranean co-existing species Pinus halepensis Miller subsp. halepensis, Quercus coccifera L. and Pistacia lentiscus L. throughout the growing season of 2010 in the forest of Stavronikita in Chalkidiki. We measured leaf water potential, leaf osmotic potential at full turgor, leaf relative water content and leaf chlorophyll content index. During measurement period high water potential observed probably due to the relatively increased rainfall. Osmotic potential at full turgor did not display any clear seasonal patterns. Leaf relative water content remained high during the growing season and there was no significant reduction during warm period; a response which is characteristic of drought-tolerant species. During summer period variation has been observed in chlorophyll content index. The highest values of chlorophyll content index were found in the two evergreen broad-leaved species. The observed differences among the species were mostly related to their response to radiation and not to drought stress, since soil water availability was adequate during the study period.
A Survey on Deep Learning with Noisy Labels: How to train your model when you cannot trust on the annotations?
Creators: name: Cordeiro, Filipe R.
name: Carneiro, Gustavo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Noisy Labels are commonly present in data sets automatically collected from the internet, mislabeled by non-specialist annotators, or even specialists in a challenging task, such as in the medical field. Although deep learning models have shown significant improvements in different domains, an open issue is their ability to memorize noisy labels during training, reducing their generalization potential. As deep learning models depend on correctly labeled data sets and label correctness is difficult to guarantee, it is crucial to consider the presence of noisy labels for deep learning training. Several approaches have been proposed in the literature to improve the training of deep learning models in the presence of noisy labels. This paper presents a survey on the main techniques in literature, in which we classify the algorithm in the following groups: robust losses, sample weighting, sample selection, meta-learning, and combined approaches. We also present the commonly used experimental setup, data sets, and results of the state-of-the-art models.
description: Paper published at SIBRAPI, 2020 (camera ready version)
Cordulegaster insignis Schneider 1843
Creators: name: Hagen, H.
Publisher: name: Zenodo
Year: 1863
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Odonata
Cordulegastridae
Cordulegaster
Cordulegaster insignis

description: 26. C. insignis Schn.
Syrien, (Mus. Berol.) Klein-Asien. (Kellemisch.)
description: Published as part of Hagen, H., 1863, Die Odonaten- und Nenropteren-Fauna Syriens und Klein-Asiens, pp. 193-199 in Wiener Entomologische Monatschrift 7 on page 197, DOI: 10.5281/zenodo.3528093
Range descriptions for the spherical mean Radon transform
Creators: name: Agranovsky, M.
name: Kuchment, P.
name: Quinto, E. T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 44A12, 92C55, 65R32

description: The transform considered in the paper averages a function supported in a ball in $\RR^n$ over all spheres centered at the boundary of the ball. This Radon type transform arises in several contemporary applications, e.g. in thermoacoustic tomography and sonar and radar imaging. Range descriptions for such transforms are important in all these areas, for instance when dealing with incomplete data, error correction, and other issues. Four different types of complete range descriptions are provided, some of which also suggest inversion procedures. Necessity of three of these (appropriately formulated) conditions holds also in general domains, while the complete discussion of the case of general domains would require another publication.
description: LATEX file, 55 pages, two EPS figures