cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Σύνταξη αντιστρόφου, Αρβανίτικο-Ελληνικού λεξικού, με βάση το Ελληνο-Αρβανίτικο Λεξικό του Π. Κουπιτώρη (γράμματα Λ-Ω). Φωνητικές και μορφολογικές παρατηρήσεις
Creators: name: Μπιλάλι, Ενκελέντ Βίκτωρ (Bilali, Enkeled)
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Αρβανίτικα
Φωνητική
Μορφολογία
Arvanitika
Phonetic
Morphology

description: Το ελληνο-αρβανιτο-αλβανικό λεξικό του Κουπιτώρη συντάχθηκε γύρω στο 1870-1880 και εκδόθηκε στην Αθήνα, το 2006 από τον ερευνητή Τίτο Γιοχαλά. Σκοπός της διπλωματικής ήταν πρώτον, η σύνταξη ενός αντιστρόφου, ελληνο-αρβανίτικου λεξικού των λημμάτων λ-ω. Στην συνέχεια, πραγματοποιείται η ανάλυση της φωνητικής προσαρμογής των ελληνικών δανείων στα αρβανίτικα και οι ιδιαίτερες διαλεκτικές φωνητικές αποκλίσεις που εντοπίσαμε. Τρίτον, παρουσιάσαμε αναλυτικά τις μορφολογικές ιδιαιτερότητες των λημμάτων. Άλλα θέματα που θίξαμε είναι οι πρακτικές δυσκολίες της συγγραφής του αρβανιτο-αλβανο-ελληνικού λεξικού και ο γλωσσικός θάνατος που απειλεί τα αρβανίτικα. Τέλος, μέσα από την σύνταξη ενός αντίστροφου λεξικού ήρθε στην επιφάνεια ένας κρυμμένος γλωσσικός πλούτος, τον οποίον, επιχειρήσαμε να αναλύσουμε και να δώσουμε ερμηνείες
description: The Greek-Arvanitika-Albanian dictionary of Panajot Kupitori was composed around 1870-1880 and it was published in Athens, in 2006, by the researcher Titos Jochalas. The aim of the present thesis was first of all, the composition of its’ reverse Albanian-Arvanitika-Greek form of the lemmas λ- ω. Furthermore, we examine the phonetic adjustments of the Greek loanwords in Arvanitika and some more special dialectical, phonetic, deviations. Thirdly, we presented the morphological features of the lemmas. We also examined some practical problems of composing an arvanit-albanian-greek dictionairy and the language death that threatens the dialect of Arvanitika. Finally, through the composition of its’ reverse form appeared many hidden linguistic treasures and we tried to analyze and then interpret them
Numerical Simulation of Noise in Pulsed Brillouin Scattering
Creators: name: Nieves, Oscar A.
name: Arnold, Matthew D.
name: Steel, Michael J.
name: Schmidt, Mikolaj K.
name: Poulton, Christopher G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present a numerical method for modelling noise in Stimulated Brillouin Scattering (SBS). The model applies to dynamic cases such as optical pulses, and accounts for both thermal noise and phase noise from the input lasers. Using this model, we compute the statistical properties of the optical and acoustic power in the pulsed spontaneous and stimulated Brillouin cases, and investigate the effects of gain and pulse width on noise levels. We find that thermal noise plays an important role in the statistical properties of the fields, and that laser phase noise impacts the SBS interaction when the laser coherence time is close to the time-scale of the optical pulses. This algorithm is applicable to arbitrary waveguide geometries and material properties, and thus presents a versatile way of performing noise-based SBS numerical simulations, which are important in signal processing, sensing, microwave photonics and opto-acoustic memory storage.
description: 10 pages, 12 figures
High resolution, High contrast optical interface for defect qubits
Creators: name: Moon, Jong Sung
name: Lee, Haneul
name: Lee, Jin Hee
name: Jeon, Woong Bae
name: Lee, Dowon
name: Lee, Junghyun
name: Paik, Seoyoung
name: Han, Sang-Wook
name: Reuter, Rolf
name: Denisenko, Andrej
name: Wrachtrup, Joerg
name: Lee, Sang-Yun
name: Kim, Je-Hyung
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Point defects in crystals provide important building blocks for quantum applications. To initialize, control, and read-out their quantum states, an efficient optical interface for addressing defects with photons is required. However, conventional confocal fluorescence microscopy with high refractive index crystals has limited photon collection efficiency and spatial resolution. Here, we demonstrate high resolution, high contrast imaging for defects qubits using microsphere-assisted confocal microscopy. A microsphere provides an excellent optical interface for point defects with a magnified virtual image that improves spatial resolution up to ~$λ$/5 as well as an optical signal-to-noise ratio by four times. These features enable individual optical addressing of single photons and single spins of spatially-unresolved defects in conventional confocal microscopy with improved signal contrast. The combined optical tweezers show the possibility of positioning or scanning the microspheres for deterministic coupling and wide-field imaging of defects. The approach does not require any complicated fabrication and additional optical system but uses simple micro-optics off-the-shelf. From these distinctive advantages of the microspheres, our approach can provide an efficient way for imaging and addressing closely-spaced defects with higher resolution and sensitivity.
description: 20 pages, 5 figures
Magnetic Instabilities and Phase Diagram of the Double-Exchange Model in Infinite Dimensions
Creators: name: Fishman, R. S.
name: Popescu, F.
name: Alvarez, G.
name: Moreno, J.
name: Maier, Th.
name: Jarrell, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Dynamical mean-field theory is used to study the magnetic instabilities and phase diagram of the double-exchange (DE) model with Hund's coupling J_H >0 in infinite dimensions. In addition to ferromagnetic (FM) and antiferromagnetic (AF) phases, the DE model supports a broad class of short-range ordered (SRO) states with extensive entropy and short-range magnetic order. For any site on the Bethe lattice, the correlation parameter q of a SRO state is given by the average q=, where theta_i is the angle between any spin and its neighbors. Unlike the FM (q=0) and AF (q=1) transitions, the transition temperature of a SRO state (T_{SRO}) with 00 but appears for J_H\neq 0. For p near 1, PS occurs between an AF with p=1 and either a SRO or a FM phase. The stability of a SRO state at T=0 can be understood by examining the interacting DOS,which is gapped for any nonzero J_H in an AF but only when J_H exceeds a critical value in a SRO state.
description: 38 pages, 11 figures, submitted to New Journal of Physics
All Summer in a Day: Inter-acting with the Εnvironment and Others through Literature. An EFL Teaching Portfolio
Creators: name: Φανάρα, Χάιδω Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Λογοτεχνία στην εκπαίδευση
Αγγλικά ως Ξένη Γλώσσα
Χαρακτήρας και περιβάλλον
Literature in education
English as a Foreign Language (EFL)
Character and setting

description: The use of literature in EFL has long been praised for its benefits, but little is done to incorporate it in the Greek classroom. This portfolio is an experiment on how literature in EFL can boost learner motivation, improve their critical thinking, and make them better readers both in and outside the classroom, while also enhancing their language skills. It was created based on my philosophy of teaching, and theories and techniques regarding the implementation of literature in EFL, such as those by Lazar, Showalter, Dunning, Rosenblatt, Carter and Long. The literary work “All Summer in a Day” was used to create a series of six lessons, focusing on the interrelationship between setting and character and how we may be shaped by the environment around us. The implementation of the lessons in the classroom proved highly beneficial for the learners, who offered positive feedback, made choices and judgements based on the story, were sensitized towards the phenomenon of bullying and understood the effect of setting on character—drawing from literature to better understand their own life.
description: Η χρήση της λογοτεχνίας στη διδασκαλία της Αγγλικής ως Ξένης Γλώσσας έχει πλέον αναγνωριστεί για τα οφέλη της, αλλά σπάνια ενσωματώνεται στην ελληνική τάξη. Αυτός ο φάκελος εργασιών είναι ένα πείραμα για να μελετηθεί πως με τη χρήση της λογοτεχνίας στη διδασκαλία της Αγγλικής ως Ξένης Γλώσσας μπορεί να αυξηθεί το κίνητρο των μαθητών, να βελτιωθεί η κριτική τους σκέψη, να γίνουν καλύτεροι αναγνώστες μέσα και έξω από την τάξη, ενώ παράλληλα βελτιώνονται οι γλωσσικές τους δεξιότητες. Δημιουργήθηκε με βάση τη δική μου φιλοσοφία για τη διδασκαλία και λαμβάνοντας υπόψη τις θεωρίες και τεχνικές σχετικά με την εφαρμογή της λογοτεχνίας στη διδασκαλία της Αγγλικής ως Ξένης Γλώσσας των Lazar, Showalter, Dunning, Rosenblatt, Carter και Long. Το λογοτεχνικό έργο «Όλο το Καλοκαίρι σε μια Μέρα» χρησιμοποιήθηκε για τη δημιουργία μιας σειράς έξι μαθημάτων, με έμφαση στην αλληλεπίδραση ανάμεσα στο περιβάλλον και τον χαρακτήρα και το πώς καθοριζόμαστε από το περιβάλλον γύρω μας. Η εφαρμογή των μαθημάτων στην τάξη αποδείχθηκε ιδιαίτερα ωφέλιμη για τους μαθητές, οι οποίοι διατύπωσαν θετικά σχόλια, έκαναν επιλογές και κρίσεις βασισμένες στην ιστορία, ευαισθητοποιήθηκαν για το φαινόμενο του σχολικού εκφοβισμού (bullying) και κατανόησαν το αντίκτυπο του περιβάλλοντος στον χαρακτήρα—αντλώντας από τη λογοτεχνία για να κατανοήσουν καλύτερα τη δική τους ζωή.
Double-Hit Signature of Millicharged Particles in 3D segmented neutrino detector
Creators: name: Gorbunov, Dmitry
name: Krasnov, Igor
name: Kudenko, Yury
name: Suvorov, Sergey
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We calculate the production of hypothetical millicharged particles (MCPs) of sub-GeV masses by the J-PARC proton beam in the framework of T2K and future T2HK neutrino oscillation experiments. Concentrating on the region of model parameter space, where an MCP can hit the near neutrino detector twice, we adopt this background-free signature to estimate the sensitivity of T2K and T2HK experiments to MCPs. We find that a previously inaccessible in direct searches region of charges 5$\times$$10^{-4}$-$10^{-2}$ $e$ for MCP masses 0.1-0.5 GeV can be probed.
description: 15 pages, 8 figures; v2: replaced with published version
Probe D-branes in Superconformal Field Theories
Creators: name: Edelstein, Jose D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We overview the main configurations of D-brane probes in the AdS_5 x X^5 background of type IIB string theory (X^5 being a Sasaki-Einstein manifold), and examine their most salient features from the point of view of the dual quiver superconformal field theory.
description: 5 pages; contribution to the proceedings of the 2nd RTN Network Workshop and Midterm Meeting: Constituents, Fundamental Forces and Symmetries of the Universe, Naples, Italy, 9-13 Oct 2006; v2: a footnote and a reference added
Adaptive paper coating weight control
Creators: name: Chen, Yamei
Publisher: name: University of British Columbia
Year: 2009

description: Paper coating is the process of applying coating colour or functional materials to the surface of paper. The goal of coating is to improve the surface quality of the paper. In this thesis, the bevelled-blade coating process is modeled based on the force equilibrium at the tip of the blade using fluid mechanic principles. The effects of the factors influencing coating weight are analyzed using simulation results. Mill trials have been carried out to investigate the dynamics of the coating process and the interaction of the cross machine profilers. Machine-direction (MD) and cross-direction (CD) variations were estimated using an algorithm previously developed at the University of British Columbia. Coating weight variations were studied and possible achievements were indicated. From the estimated cross-direction profiles, the amplitude and width of the profile response to the bump test were analyzed, and then used to build the interaction model of CD actuators. The goals of both the machine-direction and the cross-direction coating weight controls are to improve the uniformity of coating weight Due to the advantages of Generalized Predictive Control, both MD and CD control loops are designed using adaptive constrained GPC. The machine-direction coating weight process is modeled as a first-order system with a time-varying gain defined by the nonlinear relationship between coating weight and the control variable. The time-varying parameters are estimated by the recursive least-squares (RLS) method with exponential forgetting and resetting factors. The cross-direction coating process is also modeled as a first-order system with a nonlinear gain determined by the relationship between the local blade pressure and the coating weight Based on the interaction of CD actuators, the interaction matrix of the first-order model is defined as a band-diagonal matrix. Multi-input, single-output RLS estimators are developed to perform on-line parameter estimation. Constraints on the control signal are considered in response to the limits of the industrial settings. The optimal solutions to both constrained univariate and multivariable GPC are obtained using the Lagrangian multiplier method. Simulation studies are carried out to evaluate the performance of the adaptive constrained GPC. The results of the simulations show that the controllers can track the set-point changes closely, while rejecting the disturbance and handling the model plant mismatch well.
Uniform saddlepoint approximations for ratios of quadratic forms
Creators: name: Butler, Ronald W.
name: Paolella, Marc S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: Ratios of quadratic forms in correlated normal variables which introduce noncentrality into the quadratic forms are considered. The denominator is assumed to be positive (with probability 1). Various serial correlation estimates such as least-squares, Yule--Walker and Burg, as well as Durbin--Watson statistics, provide important examples of such ratios. The cumulative distribution function (c.d.f.) and density for such ratios admit saddlepoint approximations. These approximations are shown to preserve uniformity of relative error over the entire range of support. Furthermore, explicit values for the limiting relative errors at the extreme edges of support are derived.
description: Published in at http://dx.doi.org/10.3150/07-BEJ6169 the Bernoulli (http://isi.cbs.nl/bernoulli/) by the International Statistical Institute/Bernoulli Society (http://isi.cbs.nl/BS/bshome.htm)
Νομιμότητα της επεξεργασίας προσωπικών δεδομένων κατά τη φορολογική διαδικασία και η περίπτωση της συνεργασίας μεταξύ φορολογικών διοικήσεων στην Ευρωπαϊκή Ένωση
Creators: name: Φωτσεινός, Αγγελος Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Προστασία προσωπικών δεδομένων
Γενικός Κανονισμός Προστασίας Δεδομένων
Φορολογική διαδικασία
Personal data protection
General Data Protection Regulation
Tax procedure

description: Στα πλαίσια της παρούσας διπλωματικής, επιχειρείται μια κριτική ανάλυση της νομιμότητας της επεξεργασίας δεδομένων προσωπικού χαρακτήρα από την αρμόδια ελληνική φορολογική αρχή, την Ανεξάρτητη Αρχή Δημοσίων Εσόδων (ΑΑΔΕ), τόσο κατά την εσωτερική φορολογική διαδικασία, όσο και κατά το πλαίσιο διαβίβασης προσωπικών δεδομένων σε έτερες φορολογικές διοικήσεις ευρωπαϊκών κρατών. Αρχικά, παρατίθεται το ισχύον κανονιστικό πλαίσιο για την προστασία δεδομένων προσωπικού χαρακτήρα και δίδεται έμφαση στην πλημμελή αντιμετώπιση επιμέρους θεμάτων από τον εθνικό νομοθέτη. Εν συνεχεία, ακολουθεί η καταγραφή της δραστηριότητας της ΑΑΔΕ ως Υπευθύνου Επεξεργασίας δεδομένων προσωπικού χαρακτήρα, εξετάζεται ο βαθμός απόκρισής της στις επιταγές του Γενικού Κανονισμού Προστασίας Δεδομένων (ΓΚΠΔ), παρουσιάζεται το ισχύον νομοθετικό πλαίσιο για τη διαβίβαση δεδομένων προσωπικού χαρακτήρα μεταξύ των ευρωπαϊκών φορολογικών διοικήσεων και εντοπίζεται η προβληματική της ανομοιομορφίας στη στάθμη του παρεχόμενου επιπέδου ασφαλείας των επεξεργαζόμενων προσωπικών δεδομένων από τις προκείμενες φορολογικές αρχές. Εν κατακλείδι, αποπειράται μια εξαγωγή συμπερασμάτων, αφορώντων το σύνολο των ανωτέρω παρατηρήσεων
description: At the present dissertation, a critical analysis of the lawfulness of the processing of personal data performed by the competent greek tax authority, the Independent Authority for Public Revenue (IAPR), during the internal tax procedure and the transmission of personal data to other tax administrations of the European States, is attempted. Initially, the existing regulatory framework for personal data protection is listed and the incomplete addressing of individual issues by the national legislature is emphasized. Thereafter, the recording of the activity of IAPR as Data Controller of personal data follows, the degree of her compliance to the requirements of the General Data Protection Regulation (GDPR) is examined, the existing regulatory framework for personal data transmission between European tax authorities is presented and the problem of the diversity of the offered level of security for the processed personal data by the abovementioned tax authorities is identified. In conclusion, drawing conclusions, relating to all the above observations, are attempted
ISOCAM Mid-infrared spectroscopy and NIR photometry of the HII complex N4 in LMC
Creators: name: Contursi, A.
name: Rubio, M.
name: Sauvage, M.
name: Cesarsky, D.
name: Barba, R.
name: Boulanger, F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: [Abridged] We present the analysis of ISOCAM-CVF and NIR photometry data of the HII region complex N4 in LMC. The aim is twofold: 1) to study the connection between the ISM and the star content of this region; 2)to investigate the effects of the lower than galactic metallicity on dust properties. A dust features -- gas lines -- continuum fitting technique on the data, allows the production of images in each single emission and the detailed analysis of dust, and ionized gas. The NIR photometry provides, for the first time, information on the stellar content of N4. The images in single dust feature bands and gas lines clearly show that the HII region core is completely devoid of the carriers responsible for the Aromatic Features (AFs). On the other hand, the ionized gas arises almost completely in this dust cavity, where also the two main exciting stars of N4 are located. We find evidences that the effect of lower than Galactic metallicity on the carriers responsible for the AFs, is not to prevent their formation or to modify their chemical properties, but to enhance their destruction by the high and hard ISRF. We show that this mechanism is more efficient on smaller dust particles/molecules thus affecting the dust-size distribution. We argue that effects on dust--size distribution, rather than thedifferent dust properties due to a lower metallicity, should be taken into account when analyzing more distant relatively low metallicity galaxies. Finally, the analysis of the stellar content of N4 reveals 7 stars: 4 reddened O MS stars and 3 stars with envelopes. In particular, one of these, seems to be an Ultra Compact HII region containing an embedded YSO.
description: 14 pages including 16 figures, Accepted for publication in A&A
Αλγόριθμοι μηχανικής μάθησης σε ασύρματες τηλεπικοινωνίες
Creators: name: Ρέκκας, Βασίλειος-Παναγιώτης Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Μηχανική μάθηση
Αλγόριθμοι
Ασύρματες τηλεπικοινωνίες
Machine learning
Algorithms
Wireless communications

description: Σκοπός της παρούσας διπλωματικής εργασίας είναι η μελέτη και πρόβλεψη της απώλειας διαδρομής σε περιβάλλον ασύρματης επικοινωνίας. Συγκεκριμένα, αξιοποιούνται αλγόριθμοι μηχανικής μάθησης και βαθιάς μηχανικής μάθησης για την πρόβλεψη της απώλειας διαδρομής από κεραία εκπομπής. Στους αλγορίθμους αυτούς χρησιμοποιήθηκαν,ως δεδομένα, τα αποτελέσματα πειραματικών μετρήσεων απωλειών διαδρομής, όπου είχε ληφθεί υπόψιν το ύψος της κεραίας και τις συντεταγμένες μέτρησης ώς προς τον σταθμό βάσης. Ένα τμήμα των δεδομένων αυτών, το σετ εκπαίδευσης, χρησιμοποιείται για τη ρύθμιση βέλτιστων παραμέτρων και την εκπαίδευση του κάθε αλγορίθμου. Τα εναπομένοντα δεδομένα συνθέτουν το σετ ελέγχου, με το οποίο πραγματοποιούνται προβλέψεις και αξιολογείται η απόδοση του εκάστοτε μοντέλου μηχανικής μάθησης. Για την αξιολόγηση της απόδοσης χρησιμοποιούνται τα αποτελέσματα των εξής στατιστικών μετρήσεων: Μέσο Απόλυτο Σφάλμα, Μέσο Τετραγωνικό Σφάλμα, Τετραγωνική Ρίζα Μέσου Τετραγωνικού Σφάλματος και Μέσο Απόλυτο Ποσοστιαίο Σφάλμα. Βασικό κριτήριο της απόδοσης του μοντέλου μηχανικής μάθησης της παρούσας εργασίας αποτέλεσε το Μέσο Απόλυτο Ποσοστιαίο Σφάλμα. Τα αποτελέσματα της εφαρμογής των παραπάνω μοντέλων κρίνονται ικανοποιητικά λόγω της χαμηλής τιμής του Μέσου Απόλυτου Ποσοστιαίου Σφάλματος, συμπεραίνοντας μια καλή συσχέτιση πραγματικών πειραματικών δεδομένων και προβλεπόμενων.
description: The purpose of this thesis is to study and if possible to predict the path-loss in a wireless communication environment. Specifically, different machine and deep learning algorithms were implemented, such as k-nearest neighbors, Adaboost, Gradient Tree Boosting, Random Forest, Support Vector Machine και neural networks(as part of deep learning) for the prediction of the path-loss of a transmitting antenna. Experimental data, taking into account the height of the antenna and the measurement coordinates from the station, served as inputs to the algorithms used. A part of the experimental data, the training set, is used to tune the hypermarameters and train each algorithm. The rest of the data consist the test set, which is used to predict data and evaluate the performance of each machine learning model. For the evaluation of the performance we use the following statistic metrics: Mean Absolute Error (MAE), Mean Squared Error (MSE), Root Mean Squared Error (RMSE) και Mean Absolute Percentage Error (MAPE). The most important metric for our evaluation is MAPE. The results of this thesis are considered adequate due to the low MAPE value and good correlation of actual experimental values and predicted ones that were produced.
The Gell-Mann -- Okubo mass relation among baryons from fully-dynamical mixed-action lattice QCD
Creators: name: Beane, Silas R.
name: Orginos, Kostas
name: Savage, Martin J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We explore the Gell-Mann--Okubo mass relation among the octet baryons using fully-dynamical, mixed-action (domain-wall on rooted-staggered) lattice QCD calculations at a lattice spacing of b ~ 0.125 fm and pion masses of m_pi ~ 290 MeV, 350 MeV, 490 MeV and 590 MeV. Deviations from the Gell-Mann--Okubo mass relation are found to be small at each quark mass.
description: 10 pages, 7 figures
An integrated low-cost functional tester for CMOS logic
Creators: name: Low, William
Publisher: name: University of British Columbia
Year: 2009

description: This thesis focuses on improving the quality of tests performed by low-cost testers for Very Large Scale Integration (VLSI) chips. The testing of timing parameters become increasingly important with higher performance technology. Circuits that operate correctly at low speeds may fail at higher speeds because of timing problems. Most low-end test systems lack the performance required to conduct the timing diagnostics needed to perform more advanced testing of modern VLSI chips. Areas of improvement in low-cost test systems include increasing vector memory, test speed, or I/O timing and wave formatting capability. Increasing I/O timing and wave formatting capability provides a good compromise of improved tester functionality at a reasonable cost. These features provide considerably more improvements in test quality than simply increasing the raw test speed (or test pattern rate). A test strategy was developed that exploits this improved timing and I/O waveform for matting capability to generate short high-speed clock bursts which can be used to perform testing at speeds equivalent to a much higher rate than the tester’s pattern rate. This strategy can be used to test many digital designs. However, using this strategy for “high-speed” testing requires more effort in test pattern development and more test vectors than an equivalent test performed on a high-speed tester. This approach can also be used in existing high-end testers that already have the required timing and waveform formatting capabilities. A functional tester system for CMOS logic was developed that provides these improved timing and I/O formatting features. This system integrates most of tester circuits into modular functional tester chips (FTCs) which are used in parallel to form a tester. Vector encoding combined with an internal lookup table was used to reduce the memory bandwidth required to support the increased functionality. A single-channel FTC was designed and implemented on a 3.8mm x 2.9mm die and requires only 40-pins which gives considerable allowance for future increases in memory width and channels. Measurements from earlier prototypes of the FTC waveform formatter give worst case timing resolutions of 1ns and maximum rise-fall skews of 1.2ns. Worst case skews between devices were on the order of 1ns. These results are very reasonable considering the relatively conservative standard cell design using 1.2m CMOS.
AGB stars in extragalactic systems
Creators: name: Groenewegen, M. A. T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: I will be reviewing three methods to identify late-type giants in extragalactic systems, based on the main characteristics of AGB stars (they are infrared bright, variable, and have spectral peculiarities).
description: Invited review in: ``Why Galaxies Care About AGB Stars'', Eds. Franz Kerschbaum, Corinne Charbonnel, and Bob Wing
Maximum Energy Growth Rate in Dilute Quantum Gases
Creators: name: Qi, Ran
name: Shi, Zhe-yu
name: Zhai, Hui
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: In this letter we study how fast the energy density of a quantum gas can increase in time, when the inter-atomic interaction characterized by the $s$-wave scattering length $a_\text{s}$ is increased from zero with arbitrary time dependence. We show that, at short time, the energy density can at most increase as $\sqrt{t}$, which can be achieved when the time dependence of $a_\text{s}$ is also proportional to $\sqrt{t}$, and especially, a universal maximum energy growth rate can be reached when $a_\text{s}$ varies as $2\sqrt{\hbar t/(πm)}$. If $a_\text{s}$ varies faster or slower than $\sqrt{t}$, it is respectively proximate to the quench process and the adiabatic process, and both result in a slower energy growth rate. These results are obtained by analyzing the short time dynamics of the short-range behavior of the many-body wave function characterized by the contact, and are also confirmed by numerical solving an example of interacting bosons with time-dependent Bogoliubov theory. These results can also be verified experimentally in ultracold atomic gases.
description: 5 pages main text plus 5 pages supplementary
Spin-charge separation in transport through Luttinger liquid rings
Creators: name: Friederich, S.
name: Meden, V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate how the different velocities characterizing the low-energy spectral properties and the low-temperature thermodynamics of one-dimensional correlated electron systems (Luttinger liquids) affect the transport properties of ring-like conductors. The Luttinger liquid ring is coupled to two noninteracting leads and pierced by a magnetic flux. We study the flux dependence of the linear conductance. It shows a dip structure which is governed by the interaction dependent velocities. Our work extends an earlier study which was restricted to rather specific choices of the interaction parameters. We show that for generic repulsive two-particle interactions the number of dips can be estimated from the ratio of the charge current velocity and the spin velocity. In addition, we clarify the range of validity of the central approximation underlying the earlier study.
description: 10 pages including figures
Stellar populations in the Magellanic Clouds: looking through the dust
Creators: name: De Marchi, Guido
name: Panagia, Nino
name: Romaniello, Martino
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the first results of our study of stellar populations in the Large and Small Magellanic Clouds based on multi-band WFPC2 observations of "random" fields taken as part of the "pure parallel" programme carried out with the HST as a service to the community.
description: Two pages, one figure, to appear in the proceedings of IAU Symposium 241 "Stellar Populations as Building Blocks of Galaxies", eds. A. Vazdekis and R. Peletier
Messenger inflation in gauge mediation and superWIMP dark matter
Creators: name: Kawai, Shinsuke
name: Okada, Nobuchika
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss phenomenological viability of a novel inflationary model in the minimal gauge mediated supersymmetry breaking scenario. In this model, cosmic inflation is realized in the flat direction along the messenger supermultiplets and a natural dark matter candidate is the gravitino from the out-of-equilibrium decay of the bino-like neutralino at late times, which is called the superWIMP scenario. The produced gravitino is warmish and can have a large free-streaming length; thus the cusp anomaly in the small scale structure formation may be mitigated. We show that the requirement of the Standard Model Higgs boson mass to be $m_{h^0}=125.1$ GeV gives a relation between the spectrum of the cosmic microwave background and the messenger mass $M$. We find, for the e-folding number $N_e=60$, the Planck 2018 constraints (TT, TE, EE+lowE+lensing+BK15+BAO, 68% confidence level) give $M > 3.64\times 10^7$ GeV. The gravitino dark matter mass is $m_{3/2} < 5.8$ GeV and the supersymmetry breaking scale $Λ$ is found to be in the range $(1.28-1.33)\times 10^6$ GeV. Future CMB observation is expected to give tighter constraints on these parameters.
description: 9 pages, 3 figures. Version to be published
Dynamics of resistive double tearing modes with broad linear spectra
Creators: name: Bierwage, Andreas
name: Benkadda, Sadruddin
name: Hamaguchi, Satoshi
name: Wakatani, Masahiro
Publisher: name: arXiv
Year: 2006
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The nonlinear evolution of resistive double tearing modes (DTMs) with safety factor values q=1 and q=3 is studied in a reduced cylindrical model of a tokamak plasma. We focus on cases where the resonant surfaces are a small distance apart. Recent numerical studies have shown that in such configurations high-m modes are strongly unstable. In this paper, it is first demonstrated that linear DTM theory predicts the dominance of high-m DTMs. A semi-empirical formula for estimating the poloidal mode number of the fastest growing mode, m_peak, is obtained from the existing linear theory. Second, using nonlinear simulations, it is shown that the presence of fast growing high-m modes leads to a rapid turbulent collapse in an annular region, whereby small magnetic island structures form. Furthermore, consideration is given to the evolution of low-m modes, in particular the global m=1 internal kink, which can undergo nonlinear driving through coupling to fast growing linear high-m DTMs. Factors influencing the details of the dynamics are discussed. These results may be relevant for the understanding of the magnetohydrodynamic (MHD) activity near the minimum of q and may thus be of interest to studies concerned with stability and confinement in advanced tokamaks.
description: 11 pages, 10 figures
Dispersive calculation of the massless multi-loop sunrise diagram
Creators: name: Aste, Andreas
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The massless sunrise diagram with an arbitrary number of loops is calculated in a simple but formal manner. The result is then verified by rigorous mathematical treatment. Pitfalls in the calculation with distributions are highlighted and explained. The result displays the high energy behaviour of the massive sunrise diagrams, whose calculation is involved already for the two-loop case.
description: 10 pages, 1 figure, LATEX, uses kluwer.cls, some references added
Musical Mix Clarity Predication using Decomposition and Perceptual Masking Thresholds
Creators: name: Parker, Andrew
name: Fenton, Steven
Publisher: name: arXiv
Year: 2021
Subjects: subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Objective measurement of perceptually motivated music attributes has application in both target driven mixing and mastering methodologies and music information retrieval. This work proposes a perceptual model of mix clarity which decomposes a mixed input signal into transient, steady-state, and residual components. Masking thresholds are calculated for each component and their relative relationship is used to determine an overall masking score as the model's output. Three variants of the model were tested against subjective mix clarity scores gathered from a controlled listening test. The best performing variant achieved a Spearman's rank correlation of rho = 0.8382 (p<0.01). Furthermore, the model output was analysed using an independent dataset generated by progressively applying degradation effects to the test stimuli. Analysis of the model suggested a close relationship between the proposed model and the subjective mix clarity scores particularly when masking was measured using linearly spaced analysis bands. Moreover, the presence of noise-like residual signals was shown to have a negative effect on the perceived mix clarity.
description: 18 pages, 7 figures, 2 tables
The Stability of an Isentropic Model for a Gaseous Relativistic Star
Creators: name: Negi, P. S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We show that the isentropic subclass of Buchdahl's exact solution for a gaseous relativistic star is stable and gravitationally bound for all values of the compactness ratio $u [\equiv (M/R)$, where $M$ is the total mass and $R$ is the radius of the configuration in geometrized units] in the range, $0 < u \leq 0.20$, corresponding to the {\em regular} behaviour of the solution. This result is in agreement with the expectation and opposite to the earlier claim found in the literature.
description: 9 pages (including 1 table); accepted for publication in GRG
Implementation of a hierarchical open architecture multiprocessor computer numerical controller
Creators: name: Newell, Nicholas A.
Publisher: name: University of British Columbia
Year: 2008

description: A hierarchical open architecture multiprocessor (ROAM) implementation of a computer numerical controller (CNC) is presented. An advanced control system consisting of a hierarchy of independent buses is developed and tested for the purposes of providing unattended intelligent machining systems. Loosely coupled subsystems, which handle process monitoring and control, are located on a primary bus structure. An advanced digital signal processing (DSP) subsystem acts as the HOAM-CNC master processor for a secondary CNC bus. Inexpensive embedded axis controllers on the CNC bus perform interpolation, control and data collection tasks. The axis controllers have high speed communications with the HOAM-CNC master by using dual ported memory. Within the HOAM-CNC subsystem, data collection, process control and monitoring tasks are executed in a real-time multitasking environment, which also performs position control. This system demonstrates an open architecture controller, which allows any process control and monitoring task in the system to manipulate the feed, acceleration, control parameters and position commands in real time. This open approach also allows the easy integration of new process control, monitoring and position control algorithms or subsystems.
Closed-Form, Provable, and Robust PCA via Leverage Statistics and Innovation Search
Creators: name: Rahmani, Mostafa
name: Li, Ping
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: The idea of Innovation Search, which was initially proposed for data clustering, was recently used for outlier detection. In the application of Innovation Search for outlier detection, the directions of innovation were utilized to measure the innovation of the data points. We study the Innovation Values computed by the Innovation Search algorithm under a quadratic cost function and it is proved that Innovation Values with the new cost function are equivalent to Leverage Scores. This interesting connection is utilized to establish several theoretical guarantees for a Leverage Score based robust PCA method and to design a new robust PCA method. The theoretical results include performance guarantees with different models for the distribution of outliers and the distribution of inliers. In addition, we demonstrate the robustness of the algorithms against the presence of noise. The numerical and theoretical studies indicate that while the presented approach is fast and closed-form, it can outperform most of the existing algorithms.
description: Published in IEEE Transactions on Signal Processing. arXiv admin note: text overlap with arXiv:1912.12988
Overview of South-Bound Interfaces for Software-Defined Optical Networks
Creators: name: Garrich Alabarce, Miquel
name: Bravalheri, Anderson
Publisher: name: Zenodo
Year: 2018

description: Presentation of the paper "Overview of South-Bound Interfaces for Software-Defined Optical Networks", at ICTON 2018, Bucharest, Romania, July 1-5, 2018.
Work Fluctuations in the Active Ornstein- Uhlenbeck Particle model
Creators: name: Semeraro, Massimiliano
name: Suma, Antonio
name: Petrelli, Isabella
name: Cagnetta, Francesco
name: Gonnella, Giuseppe
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the large deviations of the power injected by the active force for an Active Ornstein-Uhlenbeck Particle (AOUP), free or in a confining potential. For the free-particle case, we compute the rate function analytically in d-dimensions from a saddle-point expansion, and numerically in two dimensions by it a) direct sampling of the active work in numerical solutions of the AOUP equations and b) Legendre-Fenchel transform of the scaled cumulant generating function obtained via a cloning algorithm. The rate function presents asymptotically linear branches on both sides and it is independent of the system's dimensionality, apart from a multiplicative factor. For the confining potential case, we focus on two-dimensional systems and obtain the rate function numerically using both methods a) and b). We find a different scenario for harmonic and anharmonic potentials: in the former case, the phenomenology of fluctuations is analogous to that of a free particle, but the rate function might be non-analytic; in the latter case the rate functions are analytic, but fluctuations are realised by entirely different means, which rely strongly on the particle-potential interaction. Finally, we check the validity of a fluctuation relation for the active work distribution. In the free-particle case, the relation is satisfied with a slope proportional to the bath temperature. The same slope is found for the harmonic potential, regardless of activity, and for an anharmonic potential with low activity. In the anharmonic case with high activity, instead, we find a different slope which is equal to an effective temperature obtained from the fluctuation-dissipation theorem.
description: 33 pages, 12 figures
Scale-Free Thin Discs with an Isopedic Magnetic Field
Creators: name: Wu, Yue
name: Lou, Yu-Qing
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Global stationary configurations of both aligned and logarithmic spiral MHD perturbations are constructed analytically within an axisymmetric background ofrazor-thin scale-free gas disc, which is embedded in an axisymmetric gravitational potential of a dark matter halo and involves an isopedic magnetic field almost vertically threaded through the disc plane. The scale-free index $β$ of the disc rotation speed $v_θ\propto R^{-β}$ falls in the rangeof $(-1/2 , 1/2)$ where $R$ is the cylindrical radius. With the holding-back of a deep background dark matter halo potential, the isopedic magnetic field may be strong enough to allow for the magnetic tension force overtaking the disc self-gravity, which can significantly influence global stationary MHD perturbation configurations and stability properties of the scale-free disc system. Only for stationary logarithmic spiral MHD perturbations with a perturbation scale-free index $β_1=1/4$ or for aligned stationary MHD perturbations, can the MHD disc maintain a constant radial flux of angularmomentum. The variable radial flux of angular momentum in the radial direction corresponds to a complex dispersion relation. The marginal instabilities foraxisymmetric MHD disturbances are also examined for a special case as an example. When the magnetic tension force overtakes the disc self-gravity, the scale-free disc can be completely stable against axisymmetric MHD disturbances of all wavelengths. We predict the possible existence of an isopedicallymagnetized gas disc system in rotation primarily confined by a massive dark matter halo potential.
description: 31 pages, 7 figures, Accepted for publication in MNRAS
Anisotropic Flow of Strange Particles at SPS
Creators: name: Stefanek, Grzegorz
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The elliptic flow for Lambda hyperons and K0s mesons was measured by the NA49 experiment in semicentral Pb+Pb collisions at 158A GeV. The standard method of correlating particles with an event plane has been used. Measurements of v2 near mid-rapidity are reported as a function of centrality, rapidity and transverse momentum. Elliptic flow of Lambda and K0s particles increases both with the impact parameter and with the transverse momentum. It is compared with v2 for pions and protons as well as with various model predictions. The NA49 results are compared with data from NA45/CERES and STAR experiments.
Longitudinal Magnetization and specific heat of the anisotropic Heisenberg antiferromagnet on Honeycomb lattice
Creators: name: Azizi, F.
name: Rezania, H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the effects of longitudinal magnetic field and temperature on the thermodynamic properties of two dimensional Heisenberg antiferromagnet on the honeycomb lattice in the presence of anisotropic Dzyaloshinskii-Moriya interaction and next nearest neighbor coupling exchange constant. In particular, the temperature dependence of specific heat have been investigated for various physical parameters in the model Hamiltonian. Using a hard core bosonic representation, the behavior of thermodynamic properties has been studied by means of excitation spectrum of mapped bosonic gas. The effect of Dzyaloshinskii-Moriya interaction term on thermodynamic properties has also been studied via the bosonic model by Green's function approach. Furthermore we have studied the magnetic field dependence of specific heat and magnetization for various anisotropy parameters. At low temperatures, the specific heat is found to be monotonically increasing with temperature for magnetic fields in the gapped field induced phase region. We have found the magnetic field dependence of specific heat shows a monotonic decreasing behavior for various magnetic fields due to increase of energy gap in the excitation spectrum. Also we have studied the dependence of magnetization on Dzyaloshinskii-Moriya interaction strength for different next nearest neighbor coupling constant.
description: arXiv admin note: text overlap with arXiv:1801.07042 by other authors
Performance evaluation of adaptive hybrid ARQ systems
Creators: name: Bakhtiyari, Sattar E.
Publisher: name: University of British Columbia
Year: 2009

description: In the analysis of ARQ schemes, it is typically assumed that the feedback channel is noiseless and perfect synchronization can be achieved. These assumptions may not be valid for the situations where the channel error rate is high especially with memory ARQ schemes. In such cases, a more realistic evaluation of the performance is required to provide accurate results for the schemes in question. A general investigation of ARQ schemes with and without memory, taking into account the sensitivity of frame header and return channel errors, is presented and the resulting throughput expressions are obtained. Knowing the influence of these parameters on the system performance, we propose efficient techniques to reduce their effects on the performance degradation. These techniques range from employing more powerful error correction codes to transmitting a few copies of the same sequence for the header and acknowledgment message consecutively and combining the noisy sequences at the receiver. Even though ARQ schemes offer appreciable throughput improvement in AWGN, their performance suffers greatly in the Rayleigh fading environment. In such a scenario, the optimum solution is to adapt the rate of error correction code to the prevailing channel conditions. An adaptive Type-I Hybrid ARQ (HARQ) scheme, in which the transmitter selects the code rate for each message based on the assessed channel conditions, is proposed and investigated. A model for evaluating the throughput of the scheme is presented, and it is illustrated that an accurate assessment of the channel conditions is crucial in the achievement of high throughput. Moreover, an adaptive Type-II HARQ with Complementary Punctured Convolutional Codes (CPC) is presented. This protocol stores the corrupted copies of a packet encoded with CPC codes at the receiver and combines them to improve the reliability of the system and reduce the number of unnecessary retransmissions.