cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Superluminal propagation of an optical pulse in a Doppler broadened three-state, single channel active Raman gain medium
Creators: name: Jiang, K. J.
name: Deng, L.
name: Payne, M. G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Using a single channel active Raman gain medium we show a $(220\pm 20)$ns advance time for an optical pulse of $τ_{FWHM}=15.4 μ$s propagating through a 10 cm medium, a lead time that is comparable to what was reported previously. In addition, we have verified experimentally all the features associated with this single channel Raman gain system. Our results show that the reported gain-assisted superluminal propagation should not be attributed to the interference between the two frequencies of the pump field.
description: 4 pages, 3 figures
VALIDATED RP-HPLC METHOD DEVELOPMENT FOR THE ESTIMATION OF DECITABINE & CEDAZURIDINE IN ITS COMBINEDVALIDATED RP-HPLC METHOD DEVELOPMENT FOR THE ESTIMATION OF DECITABINE & CEDAZURIDINE IN ITS COMBINED DOSAGE FORMS.
Creators: name: A. Mahesh*, Mrs. K. Radhika, R. Madhulika, Dr. K. Shravankumar DOSAGE FORMS. A. Mahesh*, Mrs. K. Radhika, R. Madhulika, Dr. K. Shravankumar
Publisher: name: Zenodo
Year: 2024

description: A new, simple, rapid and precise reverse phase high performance liquid chromatographic method has been developed for the validation of Decitabine and Cedazuridine in its pure form as well as in combined marketed formulation. Chromatography was carried out on a Phenomenex Luna C18 (4.6mm×250mm) 5µm particle size column using a mixture of Methanol: Water (45:55% v/v) as the mobile phase at a flow rate of 1.0ml/min, the detection was carried out at 240nm. The retention time of the Decitabine and Cedazuridine was found to be was 2.133, 3.692 ± 0.02min respectively. The method was validated according to ICH guidelines for linearity, sensitivity, accuracy, precision, specificity and robustness. The method produce linear responses in the concentration range of 20-60mg/ml of Decitabine and 10-30mg/ml of Cedazuridine. The inter-day and intra-day precisions were found to be within limits. The method precision for the determination of assay was below 2.0%RSD. The method is useful in the quality control of bulk and pharmaceutical formulations.

Keywords: Decitabine and Cedazuridine, RP-HPLC, Validation, Accuracy, Precision.
CHIANTI Technical Report No. 3: Computing a synthetic spectrum with CHIANTI
Creators: name: Young, Peter R.
Publisher: name: Zenodo
Year: 2023
Subjects: Atomic data
Spectra
Astrophysics

description: This Technical Report describes how a synthetic spectrum is computed within the CHIANTI IDL software. CHIANTI consists of a critically evaluated set of up-to-date atomic data, together with user-friendly programs written in Interactive Data Language (IDL) and Python to calculate the spectra from astrophysical plasmas.
Quantum cosmology with a minimal length
Creators: name: Battisti, Marco Valerio
name: Montani, Giovanni
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Quantum cosmology in the presence of a fundamental minimal length is analyzed in the context of the flat isotropic and the Taub cosmological models. Such minimal scale comes out from a generalized uncertainty principle and the quantization is performed in the minisuperspace representation. Both the quantum Universes are singularity-free and (i) in the isotropic model no evidences for a Big-Bounce appear; (ii) in the Taub one a quasi-isotropic configuration for the Universe is predicted by the model.
description: 8 pages, 3 figures; to appear in the proceedings of the II Stueckelberg Workshop, Int.J.Mod.Phys.A, references added
Dartmouth CS at WNUT-2020 Task 2: Informative COVID-19 Tweet Classification Using BERT
Creators: name: Whang, Dylan
name: Vosoughi, Soroush
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: We describe the systems developed for the WNUT-2020 shared task 2, identification of informative COVID-19 English Tweets. BERT is a highly performant model for Natural Language Processing tasks. We increased BERT's performance in this classification task by fine-tuning BERT and concatenating its embeddings with Tweet-specific features and training a Support Vector Machine (SVM) for classification (henceforth called BERT+). We compared its performance to a suite of machine learning models. We used a Twitter specific data cleaning pipeline and word-level TF-IDF to extract features for the non-BERT models. BERT+ was the top performing model with an F1-score of 0.8713.
description: Proceedings of the 6th Workshop on Noisy User-generated Text (W-NUT) at EMNLP 2020
Το φαινόμενο της εισιτηριοδιαφυγής: η πρακτική της παραχώρησης εισιτηρίων στα ΜΜΕ των Αθηνών
Creators: name: Γκίτσας, Στέργιος Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Εισιτηριοδιαφυγή
Παραχώρηση εισιτηρίων
Κίνημα "Δεν Πληρώνω"
Fare evasion
Granting-tickets practise
Refuse to Pay, Movement

description: Η παρούσα Μεταπτυχιακή Εργασία εξετάζει το φαινόμενο της εισιτηριοδιαφυγής στα Μέσα Μαζικής Μεταφοράς (ΜΜΜ) και ειδικότερα την πρακτική παραχώρησης εισιτηρίων, όπως αυτή εκτυλίσσεται στα ΜΜΜ της πόλης των Αθηνών. Στο πλαίσιο αυτό καταγράφονται και αναλύονται οι παράγοντες που σχετίζονται με την εισιτηριοδιαφυγή. Παρουσιάζονται οι μορφές με τις οποίες έχει συναντηθεί το φαινόμενο σε μεταφορικά συστήματα διεθνώς και παρατίθενται τρόποι που έχουν χρησιμοποιηθεί ώστε να μειωθεί η έντασή του. Παράλληλα, μελετάται βάσει κοινωνικών και οικονομικών στοιχείων η υφιστάμενη κατάσταση στην Αθήνα. Επιπλέον, διερευνάται με τη βοήθεια έρευνας ερωτηματολογίου η δυναμική της πρακτικής παραχώρησης εισιτηρίων μεταξύ επιβατών MMM για το έτος 2012. Γίνεται ανάλυση των απαντήσεων των μετακινούμενων και σύγκριση των απαντήσεων αυτών με στοιχεία αντίστοιχης έρευνας που διεξήχθη το 2008, ενώ παράλληλα επιχειρείται ερμηνεία των αποτελεσμάτων ώστε να καθοριστούν οι παράγοντες που οδήγησαν στη διάδοση του φαινομένου.
description: The present dissertation project examines the phenomenon of fare evasion in Public Transport Systems and particularly the granting-tickets practice as it currently exists in the transport system of Athens. In terms of the project, there are recorded and analyzed the factors that are related with fare evasion. There are defined the forms in which the phenomenon under examination manifests worldwide and there are quoted the measures that have been used in order to reduce its presentation. In addition, there is described on a social and financial basis the current situation in Athens. Moreover, the research conducted with the use of a questionnaire, scrutinizes the granting-ticket practice for the year 2012. There are analyzed the answers of the transporters which are then compared with those of previous research that was carried out four years ago. Furthermore, an effort is made to interpret the results so as to define the factors that lead to the expansion of the phenomenon.
LP WAN Gateway Location Selection Using Modified K-Dominating Set Algorithm
Creators: name: Frankiewicz, Artur
name: Glos, Adam
name: Grochla, Krzysztof
name: Łaskarzewski, Zbigniew
name: Miszczak, Jarosław
name: Połys, Konrad
name: Sadowski, Przemysław
name: Strzoda, Anna
Publisher: name: arXiv
Year: 2020
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Computer and information sciences
subject: C.2.5; B.8.1; G.2.0

description: The LP WAN networks use gateways or base stations to communicate with devices distributed on large distances, up to tens of kilometres. The selection of optimal gateway locations in wireless networks should allow providing the complete coverage for a given set of nodes, taking into account the limitations, such as the number of nodes served per access point or required redundancy. In this paper, we describe the problem of selecting the base stations in a network using the concept of $k$-dominating set. In our model, we include information about the required redundancy and spectral efficiency. We consider the additional requirements on the resulting connections and provide the greedy algorithm for solving the problem. The algorithm is evaluated in randomly generated network topologies and using the coordinates of sample real smart metering networks.
description: 14 pages, 7 figures
Differential Phase-Shift QKD in a 2:16-Split Lit PON with 19 Carrier-Grade Channels
Creators: name: Vokiic, Nemanja
name: Milovanvcev, Dinka
name: Schrenk, Bernhard
name: Hentschel, Michael
name: Hubel, Hannes
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the practical network integration of differential phase shift quantum key distribution following a cost-optimized deployment scheme where complexity is off-loaded to a centralized location. User terminal equipment for quantum state preparation at 1 GHz symbol rate is kept technologically lean through use of a directly-modulated laser as optical encoder. Integration in a passive optical network infrastructure is experimentally studied for legacy and modern optical access standards. We analyze the implications that result from Raman scattering arising from different spectral allocations of the classical channels in the O-, S-, C- and L-band, and prove that the quantum channel can co-exist with up to 19 classical channels of a fully-loaded modern access standard. Secure-key generation at a rate of 5.1 times 10e-7 bits per pulse at a quantum bit error ratio of 3.28 percent is obtained over a 13.5 km reach, 2 to 16 split passive network configuration. The high power difference of 93.8 dB between launched classical and quantum signals in the lit access network leads to a low penalty of 0.52 percent in terms of error ratio.
description: 9 pages, 10 figures, journal
Empirical Earth rotation model: a consistent way to evaluate Earth orientation parameters
Creators: name: Petrov, L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: It is customary to perform analysis of the Earth's rotation in two steps: first, to present results of estimation of the Earth orientation parameters in the form of time series based on a simplified model of variations of the Earth's rotation for a short period of time, and then to process this time series of adjustments by applying smoothing, re-sampling and other numerical algorithms. Although this approach saves computational time, it suffers from self-inconsistency: total Earth orientation parameters depend on a subjective choice of the apriori Earth orientation model, cross-correlations between points of time series are lost, and results of an operational analysis per se have a limited use for end users. An alternative approach of direct estimation of the coefficients of expansion of Euler angle perturbations into basis functions is developed. These coefficients describe the Earth's rotation over entire period of observations and are evaluated simultaneously with station positions, source coordinates and other parameters in a single LSQ solution. In the framework of this approach considerably larger errors in apriori EOP model are tolerated. This approach gives a significant conceptual simplification of representation of the Earth's rotation.
description: To be published in the Proceedings of the Geodetic Reference Frame symposium held in Muenchen in October 2006. 6 pages, 2 tables
CHIANTI Technical Report No. 3: Computing a synthetic spectrum with CHIANTI
Creators: name: Peter R. Young
Publisher: name: Zenodo
Year: 2024
Subjects: Atomic data
Spectra
Astrophysics

description: This Technical Report describes how a synthetic spectrum is computed within the CHIANTI IDL software.

CHIANTI consists of a critically evaluated set of up-to-date atomic data, together with user-friendly programs written in Interactive Data Language (IDL) and Python to calculate the spectra from astrophysical plasmas.
Textural transformations in islands on free standing Smectic C* liquid crystal films
Creators: name: Lee, Jong-Bong
name: Konovalov, Dmitri
name: Meyer, Robert B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We report on and analyze the textural transformations in islands, thicker circular domains, floating in very thin free standing chiral Smectic C* liquid crystal films. As an island is growing, an initial pure bend texture of the c-director changes into a reversing spiral at a critical size. Another distinct spiral texture is induced by changing the boundary condition at the central point defect in the island. To understand these transformations from a pure bend island, a linear stability analysis of the c-director free energy is developed, which predicts a state diagram for the island. Our observations are consistent with the theoretical phase diagram.
description: 15 pages, 8 figures
Magnetic-buoyancy-induced mixing in AGB Stars: a theoretical explanation of the non-universal [Y/Mg]-age relation
Creators: name: L., Magrini
name: D., Vescovi
name: G., Casali
name: S., Cristallo
name: C., Viscasillas Vazquez
name: G., Cescutti
name: L., Spina
name: M., Van Der Swaelmen
name: S, Randich
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The use of abundance ratios involving Y, or other slow-neutron capture elements, are routinely used to infer stellar ages.Aims.We aim to explain the observed [Y/H] and [Y/Mg] abundance ratios of star clusters located in the inner disc with a new prescription for mixing in Asymptotic Giant Branch (AGB) stars. In a Galactic chemical evolution model, we adopt a new set of AGB stellar yields in which magnetic mixing is included. We compare the results of the model with a sample of abundances and ages of open clusters located at different Galactocentric distances. The magnetic mixing causes a less efficient production of Y at high metallicity. A non-negligible fraction of stars with super-solar metallicity is produced in the inner disc, and their Y abundances are affected by the reduced yields. The results of the new AGB model qualitatively reproduce the observed trends for both [Y/H] and [Y/Mg] vs age at different Galactocetric distances. Our results confirm from a theoretical point of view that the relationship between [Y/Mg] and stellar age cannot be universal, i.e., the same in every part of the Galaxy. It has a strong dependence on the star formation rate, on the s-process yields and their relation with metallicity, and thus it varies across the Galactic disc.
description: Accepted for publication as an A&A Letter
On dynamic cumulative past inaccuracy measure based on extropy
Creators: name: Hashempour, Majid
name: Mohammadi, Morteza
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Pharmacology
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Plant Biology
subject: FOS: Biological sciences

description: An alternate measure of extropy based on the cumulative distribution function rather than the probability density function of a random variable is called the cumulative past extropy (CPE). In this communication, the concept of CPE has been extended to cumulative past extropy inaccuracy (CPEI) and then to a dynamic version of it. A characterization problem for the proposed dynamic extropy inaccuracy measure has been studied under the proportional reversed hazard rate model. We also discuss the stochastic ordering of dynamic cumulative past extropy and certain results based on it. Some well-known lifetime distributions have been characterized using the proposed dynamic cumulative past extropy inaccuracy (DCPEI) measure. Three methods for nonparametric estimation of the DCPEI measure based on kernel and empirical estimators are proposed. Simulation results show that the kernel-based estimators of the DCPEI measure perform better than the empirical-based estimator under different sample sizes and times. A real data set is considered to show the behavior of the estimators in real cases.
Η σχέση των εσωτερικών και των εξωτερικών κινήτρων για ασκηση με την τακτική συμμετοχή και εγκατάλειψη ατόμων τρίτης ηλικίας
Creators: name: Μηλούση, Αθανασία Παναγιώτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Θεωρία αυτοκαθορισμού
Ηλικιωμένοι
Τύποι ρύθμισης συμπεριφοράς
Self determination theory
Intrinsic and extrinsic motives
Older individuals

description: Σκοπός της παρούσας έρευνας ήταν να εξετάσει τη σχέση των εσωτερικών και των εξωτερικών κινήτρων για άσκηση των ατόμων της τρίτης ηλικίας με την πρόγνωση της συνέχισης ή της εγκατάλειψης της άσκησης των ατόμων αυτών, μέσα στα πλαίσια της θεωρίας του αυτοκαθορισμού (Deci & Ryan, 2000). Στη μελέτη συμμετείχαν 202 υγιείς ηλικιωμένοι, γυναίκες και άνδρες, ηλικίας 64 έως 76 ετών, που ασκούνται σε οργανωμένα προγράμματα άσκησης ιδιωτικών και δημοτικών γυμναστηρίων. Οι ασκούμενοι συμπλήρωσαν την Κλίμακα Ρύθμισης της Συμπεριφοράς στην Άσκηση-2 (Markland & Tobin, 2004) πριν την έναρξη του προγράμματος άσκησης. Έξι μήνες αργότερα αξιολογήθηκε η παραμονή τους στο γυμναστήριο. H ανάλυση διωνυμικής λογαριθμικής παλινδρόμησης έδειξε ότι ο μόνος στατιστικά σημαντικός παράγοντας πρόγνωσης της παραμονής στο γυμναστήριο ( p
description: The purpose of the study was to examine the relationship of intrinsic and extrinsic motives for exercise participation with exercise adherence/dropout among older individuals, from the Self-Determination Theory viewpoint (Deci & Ryan, 2000). Participants were 202 physically active Greek older adults, men and women (64 to 76 years), who completed the Behavioral Regulation in Exercise Questionnaire-2. They completed the instrument before initiation of their exercise activities in fitness centers. Six months later, the status of their adherence or dropout from the fitness center was determined. Binomial logistic regression analysis revealed that the only statistically significant predictor of exercise adherence was introjected regulation with an odds ratio of .20. The remaining regulations predicted the outcome in theoretically expected ways, but not in a statistically significant manner. Behavioral regulations correctly classified 84.97% of the participants in the adherence/dropout groups. The results supported in part the hypothesis, that more internalized behavioural regulations would mainly explain exercise adherence/dropout among older individuals.
Heat Evacuation from Active Raman Media Heat Evacuation from Active Raman Media Using Quasi-PT Symmetry Coupling
Creators: name: Nemova, Galina
name: Caloz, Christophe
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We propose to use frequency-selective quasi parity-time symmetry to reduce the heat generated by coherent anti-Stokes Raman scattering (CARS) reversed cycles in active Raman media with phase mismatch. This is accomplished using a coupled-waveguide structure, which includes the active Raman waveguide (RW), where the Stokes signal undergoes amplification via stimulated Stokes Raman scattering (SSRS), and a dissipative waveguide (DW), which is tuned to the anti-Stokes wavelength so as to evacuate the corresponding anti-Stokes photons from the RW by coupling. The DW introduces optical loss that partially offsets the growth of the anti-Stokes signal in the RW and hence suppress the reversed CARS cycles that would otherwise result into heat generation in the RW. It is shown that the frequency-selective quasi parity-time symmetry provided by the DW can reduce the heat in active Raman media by a very factor of up to five when the CARS phase mismatch is compensated for by the optimum level of coupling between the RW and the DW.
description: 8 pages, 9 figures
Projection tests for linear hypothesis in the functional response model
Creators: name: Smaga, Łukasz
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Physiology
subject: Mathematical Sciences not elsewhere classified
subject: Cancer
subject: Mental Health

description: This article concerns the linear hypothesis testing problem in the functional response model, which is one of the regression models considered in functional data analysis. In this model, the response is a function represented as a random process, while the predictors are random variables. To test the linear hypothesis, projection tests are constructed and theoretically justified. Namely, a kind of equivalence between the functional null hypothesis and its projected version is established. Different Gaussian processes and numbers of projections are considered in the implementation of new solutions. Moreover, as there is no one test having the best power for all correlation cases, a simple combining test is also proposed. It has satisfactory power in all cases. In simulation studies, the new tests are compared with existing methods in terms of size control and power. A real data example is also provided to illustrate the results.
Μια ‘‘διπλωματική περιπλοκή’’: το ζήτημα των Εβραίων με ιταλική, ισπανική και πορτογαλική υπηκοότητα στη Θεσσαλονίκη της Κατοχής, 1941-1944:
Creators: name: Φράγκου, Μαρία Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Διπλωματία
Γερμανική κατοχή
Θεσσαλονίκη
Diplomacy
Germany occupation
Thessaloniki

description: Η εργασία διερευνά την χρονική περίοδο που εισέβαλε ο Άξονας στα ελληνικά εδάφη. Και είχε ως βασική του μέριμνα να επιβάλει μια ισχυρή αντισημιτική προπαγάνδα. Πιο συγκεκριμένα αναλύεται η κατάσταση που επικράτησε στη Θεσσαλονίκη η οποία βρέθηκε από την αρχή υπό την ναζιστική γερμανική διοίκηση. Τη χρονιά που εκδόθηκαν στην πόλη τα αντιεβραϊκά διατάγματα όπου και είχαν ως σκοπό την άμεση δίωξη και εκτόπιση του εβραϊκού πληθυσμού της Θεσσαλονίκης στα ναζιστικά στρατόπεδα. Αφού πρώτα κατάσχονταν όλες οι εβραϊκές περιουσίες. Ένας αριθμός Εβραίων κατοίκων της Θεσσαλονίκης εξαιρέθηκε από τις ναζιστικές διώξεις. Αφού οι ίδιες οι γερμανικές αρχές έδωσαν την δυνατότητα εξαίρεσης των Ισπανών και Ιταλών Εβραίων υπηκόων. Η έκδοση του διατάγματος της γερμανικής κυβέρνησης περί εκτόπισης των Εβραίων ελληνικής υπηκοότητας της Θεσσαλονίκης και περί απέλασης των Εβραίων υπηκόων άλλων κρατών, είχε ως αποτέλεσμα μια σειρά από εξαντλητικές διπλωματικές διαβουλεύσεις. Μεταξύ της γερμανικής, της ισπανικής και της ιταλικής κυβέρνησης να φθάσουν σε συμβιβασμό δυνάμει του οποίου οι Ισπανοί και Ιταλοί υπήκοοι θα επαναπατρίζονταν. Οι προστατευόμενοι Ισπανοί, Πορτογάλοι και Ιταλοί Εβραίοι υπό την εποπτεία των προξενείων τους αρχικά, βρέθηκαν σε καθεστώς εξαιρέσιμης κατηγορίας. Δεν εκτοπίστηκαν σε στρατόπεδα εξόντωσης αλλά επαναπατρίστηκαν στις χώρες καταγωγής τους, είτε διέφυγαν από τη Θεσσαλονίκη σε ιταλική ζώνη κατοχής, στην Αθήνα.
description: This paper explores the period Axis invaded the Greek territories. And had as its basic responsibility to impose a strong anti-Semitic propaganda. More specifically it is analyzed the situation that prevailed in Thessaloniki, which was found from the beginning under nazi German administration. The year in the city there were issued antijewish decrees, which intended the direct pursuit and displacement of the Jewish population of Thessaloniki in the nazi camps. Having first seized all Jewish property. A number of Jewish inhabitants of Thessaloniki were excluded from nazi persecution. After the German authorities themselves gave the option to exclude Jews from Spain and Italian nationals. The issuance of the decree of the German government for deportation of nationals of other countries had resulted in a series of gruelling diplomatic consultations. Among the Spanish, German and Italian government to reach a compromise under which Spanish and Italian nationals will be repatriated. Protected Spaniards, Italians and Portuguese Jews under supervision of their consulates were found in a status of excludable category. Not displaced in camps but were repatriated to their home countries or fled from Thessaloniki in the Italian occupation zone in Athens.
High energy neutrino yields from astrophysical sources I: Weakly magnetized sources
Creators: name: Kachelriess, M.
name: Tomas, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate the yield of high energy neutrinos produced in astrophysical sources with negligible magnetic fields varying their interaction depth from nearly transparent to opaque. We take into account the scattering of secondaries on background photons as well as the direct production of neutrinos in decays of charm mesons. If multiple scattering of nucleons becomes important, the neutrino spectra from meson and muon decays are strongly modified with respect to transparent sources. Characteristic for neutrino sources containing photons as scattering targets is a strong energy-dependence of the ratio $R^0$ of $ν_μ$ and $ν_e$ fluxes at the sources, ranging from $R^0=ϕ_μ/ϕ_e\sim 0$ below threshold to $R^0\sim 4$ close to the energy where the decay length of charged pions and kaons equals their interaction length on target photons. Above this energy, the neutrino flux is strongly suppressed and depends mainly on charm production.
description: 10 pages, 16 figures, references added, matches published version
Universal conductance of a PT-symmetric Luttinger liquid after a quantum quench
Creators: name: Moca, Cătălin Paşcu
name: Dóra, Balázs
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the non-equilibrium dynamics and transport of a PT-symmetric Luttinger liquid (LL) after an interaction quench. The system is prepared in domain wall initial state. After a quantum quench to spatially homogeneous, PT-symmetric LL, the domain wall develops into a flat central region that spreads out ballistically faster than the conventional Lieb-Robinson maximal speed. By evaluating the current inside the regular lightcone, we find a universal conductance $e^2/h$, insensitive to the strength of the PT-symmetric interaction. On the other hand, by repeating the very same time evolution with a hermitian LL Hamiltonian, the conductance is heavily renormalized by the hermitian interaction as $e^2/hK$ with $K$ the LL parameter. Our analytical results are tested numerically, confirming the universality of the conductance in the non-hermitian realm.
description: 5 pages, 2 figures, 2 pages of supplementary material
Improvements and Extensions on Metaphor Detection
Creators: name: Ma, Weicheng
name: Liu, Ruibo
name: Wang, Lili
name: Vosoughi, Soroush
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Metaphors are ubiquitous in human language. The metaphor detection task (MD) aims at detecting and interpreting metaphors from written language, which is crucial in natural language understanding (NLU) research. In this paper, we introduce a pre-trained Transformer-based model into MD. Our model outperforms the previous state-of-the-art models by large margins in our evaluations, with relative improvements on the F-1 score from 5.33% to 28.39%. Second, we extend MD to a classification task about the metaphoricity of an entire piece of text to make MD applicable in more general NLU scenes. Finally, we clean up the improper or outdated annotations in one of the MD benchmark datasets and re-benchmark it with our Transformer-based model. This approach could be applied to other existing MD datasets as well, since the metaphoricity annotations in these benchmark datasets may be outdated. Future research efforts are also necessary to build an up-to-date and well-annotated dataset consisting of longer and more complex texts.
Permutation asymmetry inducing entanglement between degrees of freedom in multiphoton states
Creators: name: Sun, F. W.
name: Liu, B. H.
name: Wong, C. W.
name: Guo, G. C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We describe and examine entanglement between different degrees of freedom in multiphoton states based on the permutation properties. From the state description, the entanglement comes from the permutation asymmetry. According to the different permutation properties, the multiphoton states can be divided into several parts. It will help to deal with the multiphoton interference, which can be used as the measurement of the entanglement.
description: Final version
Constraints on Dark Energy from Supernovae, Gamma Ray Bursts, Acoustic Oscillations, Nucleosynthesis and Large Scale Structure and the Hubble constant
Creators: name: Wright, Edward L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The luminosity distance vs. redshift law is now measured using supernovae and gamma ray bursts, and the angular size distance is measured at the surface of last scattering by the CMB and at z = 0.35 by baryon acoustic oscillations. In this paper this data is fit to models for the equation of state with w = -1, w = const, and w(z) = w_0+w_a(1-a). The last model is poorly constrained by the distance data, leading to unphysical solutions where the dark energy dominates at early times unless the large scale structure and acoustic scale constraints are modified to allow for early time dark energy effects. A flat LambdaCDM model is consistent with all the data.
description: 19 pages Latex with 8 Postscript figure files. A new reference and constraint, w vs w' contour plots updated. Version accepted by the the ApJ
SH$α$DE: Survey description and mass-kinematics scaling relations for dwarf galaxies
Creators: name: Barat, Dilyar
name: D'Eugenio, Francesco
name: Colless, Matthew
name: Sweet, Sarah M.
name: Groves, Brent
name: Cortese, Luca
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Study of H$α$ from Dwarf Emissions (SH$α$DE) is a high spectral resolution (R=13500) H$α$ integral field survey of 69 dwarf galaxies with stellar masses $10^6
description: 19 pages, 13 figures, 5 tables; published in MNRAS
Spin dynamics in semiconductor nanostructures
Creators: name: Wu, M. W.
name: Weng, M. Q.
name: Cheng, J. L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We review our theoretical investigation on the spin relaxation/dephasing in spin precession and spin diffusion/transport in semiconductor nanostructures based on the kinetic spin Bloch equation approach.
description: 4 pages; An invited talk to be presented at nanomeeting-2007 (http://www.nanomeeting.org/). To be published in Physics, Chemistry and Application on Nanostructures, 2007 (World Scientific, Singapore, 2007)
Imaging polar and dipolar sources of geophysical anomalies by probability tomography. Part I: theory and synthetic examples
Creators: name: Mauriello, Paolo
name: Patella, Domenico
Publisher: name: arXiv
Year: 2006
Subjects: subject: Geophysics (physics.geo-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: We develop the theory of a generalized probability tomography method to image source poles and dipoles of a geophysical vector or scalar field dataset. The purpose of the new generalized method is to improve the resolution power of buried geophysical targets, using probability as a suitable paradigm allowing all possible equivalent solution to be included into a unique 3D tomography image. The new method is described by first assuming that any geophysical field dataset can be hypothesized to be caused by a discrete number of source poles and dipoles. Then, the theoretical derivation of the source pole occurrence probability (SPOP) tomography, previously published in detail for single geophysical methods, is symbolically restated in the most general way. Finally, the theoretical derivation of the source dipole occurrence probability (SDOP) tomography is given following a formal development similar to that of the SPOP tomography. The discussion of a few examples allows us to demonstrate that the combined application of the SPOP and SDOP tomographies can provide the best core-and-boundary resolution of the most probable buried sources of the anomalies detected within a datum domain.
description: 6 pages, 3 figures
Μελέτη έντασης των σχέσεων σε κοινωνικά δίκτυα μουσικής
Creators: name: Μαρτινίδου, Γλυκερία Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Ομοφιλία
Ένταση σχέσης
Κοινωνικό δίκτυο
Homophily
Relationship strength
Social network

description: Το κοινωνικό δίκτυο είναι μια κοινωνική δομή η οποία αποτελείται από ένα σύνολο ατόμων ή οργανισμών και από τις δυαδικές σχέσεις μεταξύ αυτών. Τα κοινωνικά δίκτυα λοιπόν, αποκτούν όλο και μεγαλύτερη σημασία στη σύγχρονη εποχή γιατί αντικατοπτρίζουν τις τάσεις μιας κοινωνίας. Επομένως, αξίζει ιδιαίτερα να μελετηθούν οι σχέσεις μεταξύ των χρηστών σε ένα κοινωνικό δίκτυο γιατί μέσα από τη μελέτη των σχέσεων αυτών μπορούν να βγουν χρήσιμα συμπεράσματα και να γίνουν προβλέψεις που αφορούν τους χρήστες του. Έρευνες του παρελθόντος επικεντρώθηκαν στη μελέτη φιλικών σχέσεων σε ένα κοινωνικό δίκτυο. Ωστόσο σε ένα διαδικτυακό κοινωνικό δίκτυο υπάρχουν όλα τα είδη σχέσεων καθώς επίσης και ένα μεγάλο φάσμα εντάσεων αυτών των σχέσεων. Στη συγκεκριμένη εργασία αναπτύσσουμε ένα μοντέλο χωρίς επίβλεψη για να υπολογίσουμε την ένταση των σχέσεων από τον συνδυασμό των ομοιοτήτων των προφίλ και των αλληλεπιδράσεων ενός ζεύγους ατόμων. Έγινε η εφαρμογή του μοντέλου σε δεδομένα του μουσικού κοινωνικού δικτύου Last.fm και έγινε η αξιολόγηση των αποτελεσμάτων.
description: The social network is a social structure consisting of a set of individuals or organizations and of binary relations between them. Social networks are therefore becoming increasingly important in modern times to reflect the trends of a society. Therefore, it is important to study the relationships between users in a social network because through the study of these relationships can come useful conclusions and make predictions on users. Surveys in the past have focused on the study of friendships in a social network. However, in an online social network are all kinds of relationships as well as a wide range of intensities of these relationships. In this thesis we develop an unsupervised model to calculate the intensity of the relationships by the combination of the similarities of the profiles and the interactions of a pair of users. We applied the model to data of the music social network Last.fm and we evaluated the results.
Energy and system size dependence of charged particle elliptic flow and $v_2/\eps$ scaling
Creators: name: Voloshin, Sergei A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We report measurements of charged particle elliptic flow %($v_2$) at mid-rapidity in Au+Au and Cu+Cu collisions at $\sqrt{s_{_{NN}}}=62$ and 200 GeV. Using correlations between main STAR TPC and Forward TPCs ensures minimal bias due to non-flow effects. We further investigate the effect of flow fluctuations on $v_2/\eps$ scaling studying initial geometry eccentricity fluctuations in Monte-Carlo Glauber model, consistent with STAR direct measurements of elliptic flow fluctuations. It is found that accounting for the effect of flow fluctuations improves $v_2/\eps$ scaling.
description: 4 pages, Quark Matter 2006 proceedings
Production of strange particles at intermediate pT at RHIC
Creators: name: Hwa, Rudolph C.
name: Yang, C. B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The recombination model is applied to the production of $K, ϕ, Λ$ and $Ω$ at all $p_T$ in central Au+Au collisions. The thermal-shower component of the recombination is found to be important for $K$ and $Λ$, but only in a minor way for $ϕ$ and $Ω$ in the intermediate to high $p_T$ region. The normalization and inverse slope of the thermal partons in the strange sector are determined by fitting the low-$p_T$ data. At higher $p_T$ the data of $K, ϕ, Λ$ and $Ω$ in the log scale are all well reproduced in our study that extends the thermal contribution and includes the shower contribution. The calculated result on the $Λ/K$ ratio rises to a maximum of around 2 at $p_T\approx 4$ GeV/c, arching over the data in linear scale. The production of $ϕ$ and $Ω$ are shown to arise mainly from the recombination of thermal partons, thus exhibiting exponential $p_T$ dependences in agreement with the data. Their ratio, $R_{Ω/ϕ}$, rises linearly to $p_T\approx 4$ GeV/c and develops a maximum at $p_T\approx 5.5$ GeV/c. It is argued that the $p_T$ spectra of $ϕ$ and $Ω$ reveal directly the partonic nature of the thermal source that characterizes quark-gluon plasma. Comments are made on the $Ω$ puzzle due to the simultaneous observation of both the exponential behavior of the $Ω$ spectrum in $p_T$ and the existence of low-$p_T$ particles associated with $Ω$ as trigger.
description: Revised manuscript with new figures
Quantification of mismatch error in randomly switching linear state-space models
Creators: name: Karimi, Parisa
name: Zhao, Zhizhen
name: Butala, Mark
name: Kamalabadi, Farzad
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Switching Kalman Filters (SKF) are well known for their ability to solve the piecewise linear dynamic system estimation problem using the standard Kalman Filter (KF). Practical SKFs are heuristic, approximate filters that are not guaranteed to have optimal performance and require more computational resources than a single mode KF. On the other hand, applying a single mode mismatched KF to a switching linear dynamic system (SLDS) results in erroneous estimation. This paper aims to quantify the average error an SKF can eliminate compared to a mismatched, single mode KF in a known SLDS before collecting measurements. Mathematical derivations for the first and second moments of the estimators errors are provided and compared. One can use these derivations to quantify the average performance of filters beforehand and decide which filter to run in operation to have the best performance in terms of estimation error and computation complexity. We further provide simulation results that verify our mathematical derivations.
Γλωσσική επάρκεια σε μαθητές δημοτικού από γλωσσικές μειονότητες με δυσκολίες στη σχολική μάθηση:
Creators: name: Λουλά, Μαρία Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Γλωσσική Επάρκεια
Διγλωσσία
Δυσκολίες στη σχολική μάθηση
Linguistic awareness
Bilingualism
Learning Difficulties

description: Σκοπός της διατριβής ήταν η διερεύνηση της γλωσσικής επάρκειας και η σχέση της με τη χαμηλή επίδοση των δίγλωσσων μαθητών. Τα τελευταία χρόνια στο επίκεντρο του ερευνητικού ενδιαφέροντος βρίσκονται οι παράγοντες οι οποίοι συνθέτουν το πλαίσιο μέσα στο οποίο οι δίγλωσσοι μαθητές οικοδομούν τη γνώση. Από τα πορίσματα των πολλών ερευνών που διεξάχθηκαν σχετικά, φαίνεται ότι η βεβιασμένη απόδοση ευθυνών για τη σχολική αποτυχία των δίγλωσσων μαθητών είτε στο ίδιο το παιδί είτε στη μειονοτική γλωσσική ομάδα είτε στον ίδιο τον εκπαιδευτικό θα πρέπει να προβληματίσει περισσότερο τους εμπλεκόμενους φορείς του εκπαιδευτικού συστήματος. Στην παρούσα έρευνα έγινε μια προσπάθεια διερεύνησης του γλωσσικού προφίλ σε επίπεδο επάρκειας μαθητών που φοιτούν στο δημοτικό και προέρχονται από γλωσσικές μειονότητες. Κοινό χαρακτηριστικό των παιδιών που συμμετείχαν στην έρευνα ήταν τα προβλήματα μάθησης που αντιμετώπιζαν στο σχολείο και η παρουσία διαταραχών στο λόγο.
description: The aim of the present thesis is to investigate linguistic awareness and its implication in low achieving bilingual students. During the last years the factors which compose the framework within which bilingual students acquire knowledge, have been at the heart of research. From the findings of many researches, it has become obvious that putting the blame for school failure of bilingual students on either the students themselves, the minority language or the teacher, should be given a second thought by the people responsible. In the present thesis there has been an effort to explore the linguistic profile as far as language proficiency is concerned, in minority children who attend primary school. All children who took part in the research were experiencing learning problems at school and language disorders.
Τα Θρησκευτικά Σύμβολα στα Ευρωπαϊκά Εκπαιδευτικά Ιδρύματα. – Παρουσίαση και κριτική προσέγγιση νομολογιακών περιπτώσεων:
Creators: name: Λαχανά, Χριστίνα Κλέωνος
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Θρησκευτικά Σύμβολα
Εκπαιδευτικά Ιδρύματα
Νομολογιακές Περιπτώσεις
Religious Symbols
Educational Institutions
Jurisprudential Cases

description: Σκοπός της παρούσας μεταπτυχιακής εργασίας ήταν η έρευνα της θέσεως των θρησκευτικών συμβόλων στα ευρωπαϊκά εκπαιδευτικά ιδρύματα. Αρχικά, προσεγγίσαμε την έννοια των θρησκευτικών συμβόλων και του πεδίου προστασίας τους στο πλαίσιο της ΕΣΔΑ. Ακολούθως, παρουσιάσαμε τα ζητήματα που ανέκυψαν στα δικαστήρια της Γαλλίας, της Γερμανίας, της Αγγλίας, της Ιταλίας και του ΕΔΑΔ, σχετικά με την παρουσία τους στα ευρωπαϊκά εκπαιδευτικά ιδρύματα. Αναφερθήκαμε συνοπτικά στις σχέσεις Εκκλησίας και Κράτους των συγκεκριμένων κρατών, αναλύσαμε τις αποφάσεις των δικαστηρίων και τις μελετήσαμε συγκριτικά.
description: The aim of this thesis was the study of the status of religious symbols in European educational institutions. At first, we bordered on the meaning of religious symbols and the scope of their protection under the ECHR. Then, we presented the issues raised before the courts of France, Germany, England, Italy and before the ECtHR on the presence of religious symbols in European educational institutions. We touched upon the relationships between State and Church in those countries, we analyzed the decisions of the courts and we studied them comparatively.
Time Dependent Hadronization via HERMES and EMC Data Consistency
Creators: name: Gallmeister, K.
name: Mosel, U.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Using QCD-inspired time dependent cross sections for pre-hadrons we provide a combined analysis of available experimental data on hadron attenuation in DIS off nuclei as measured by HERMES with 12 and 27 GeV and by EMC with 100 and 280 GeV lepton beam energies. We extract the complete four-dimensional evolution of the pre-hadrons using the JETSET-part of PYTHIA. We find a remarkable sensitivity of nuclear attenuation data to the details of the time-evolution of cross sections. Only cross sections evolving linearly in time describe the available data in a wide kinematical regime. Predictions for experimental conditions at JLAB (5 and 12 GeV beam energies) are included.
description: version as published
Optimal control of differential quasivariational inequalities with applications in contact mechanics
Creators: name: Sofonea, Mircea
name: Bollati, Julieta
name: Tarzia, Domingo A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35M87, 35R35, 47J20, 49J40

description: We consider a differential quasivariational inequality for which we state and prove the continuous dependence of the solution with respect to the data. This convergence result allows us to prove the existence of at least one optimal pair for an associated control problem. Finally, we illustrate our abstract results in the study of a free boundary problem which describes the equilibrium of a viscoelastic body in frictionless contact with a foundation made of a rigid body coveblack by a rigid-elastic layer.
description: 23 pages, 0 figures
Inverse-design magnonic devices
Creators: name: Wang, Qi
name: Chumak, Andrii V.
name: Pirro, Philipp
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: The field of magnonics offers a new type of low-power information processing, in which magnons, the quanta of spin waves, carry and process data instead of electrons. Many magnonic devices were demonstrated recently, but the development of each of them requires specialized investigations and, usually, one device design is suitable for one function only. Here, we introduce the method of inverse-design magnonics, in which any functionality can be specified first, and a feedback-based computational algorithm is used to obtain the device design. Our proof-of-concept prototype is based on a rectangular ferromagnetic area which can be patterned using square shaped voids. To demonstrate the universality of this approach, we explore linear, nonlinear and nonreciprocal magnonic functionalities and use the same algorithm to create a magnonic (de-)multiplexer, a nonlinear switch and a circulator. Thus, inverse-design magnonics can be used to develop highly efficient rf applications as well as Boolean and neuromorphic computing building blocks.
description: 19 Pages, 6 Figures