cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
TESS Observations of the Luhman 16AB Brown Dwarf System: Rotational Periods, Lightcurve Evolution, and Zonal Circulation
Creators: name: Apai, Daniel
name: Nardiello, Domenico
name: Bedin, Luigi R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Brown dwarfs were recently found to display rotational modulations, commonly attributed to cloud cover of varying thickness, possibly modulated by planetary-scale waves. However, the long-term, continuous, high-precision monitoring data to test this hypothesis for more objects is lacking. By applying our novel photometric approach to TESS data, we extract a high-precision lightcurve of the closest brown dwarfs, which form the binary system Luhman 16AB. Our observations, that cover about 100 rotations of Luhman 16B, display continuous lightcurve evolution. The periodogram analysis shows that the rotational period of the component that dominates the lightcurve is 5.28 h. We also find evidence for periods of 2.5 h, 6.94 h, and 90.8 h. We show that the 2.5 h and 5.28 h periods emerge from Luhman 16B and that they consist of multiple, slightly shifted peaks, revealing the presence of high-speed jets and zonal circulation in this object. We find that the lightcurve evolution is well fit by the planetary-scale waves model, further supporting this interpretation. We argue that the 6.94 h peak is likely the rotation period of Luhman 16A. By comparing the rotational periods to observed v sin(i) measurements, we show that the two brown dwarfs are viewed at angles close to their equatorial planes. We also describe a long-period (P~91 h) evolution in the lightcurve, which we propose emerges from the vortex-dominated polar regions. Our study paves the way toward direct comparisons of the predictions of global circulation models to observations via periodogram analysis.
description: Published in the Astrophysical Journal on January 7 with a video abstract. Visualization of the lightcurve and Lomb-Scargle periodogram analysis is available at: https://youtu.be/1j9eRyohzg0 . 35 pages, 16 figures
2.19_Loenbaek: Method for initial rotor design with coupling of power and loads
Creators: name: Loenbaek, Kenneth
name: Dam, Bjarke
name: Madsen, Jens Ingemann
name: Bak, Christian
Publisher: name: Zenodo
Year: 2019
Subjects: Initial Rotor design

description: We present our work on initial rotor design, where we investigate the optimal load distribution for different load constrains.
Gravito-magnetic trapping of 87Rb
Creators: name: Bertoldi, A.
name: Ricci, L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Three-dimensional trapping of neutral atoms in a combined gravito-magnetic potential is reported. Clouds of cold rubidium atoms in different hyperfine states of the ground level were trapped with a lifetime of 4.5 s. Confinement exclusively occurred as a combination of the static magnetic force and the gravitational force.
description: 3 figures
Θεωρητική προσέγγιση του κοινωνικού άγχους από εξελικτική οπτική:
Creators: name: Καβαδάτος, Αλέξιος Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Κοινωνικό άγχος
Ψυχοβιολογικό μοντέλο
Εξελικτική θεωρία
Social anxiety
Psychosocial model
Evolutionary theory

description: Σκοπός της εργασίας αυτής είναι η σκιαγράφηση του ψυχοβιολογικού μοντέλου ερμηνείας του κοινωνικού άγχους των Trower και Gilbert και η εξέταση των βασικών ερευνητικών ευρημάτων υπό το πρίσμα της εξελικτικής θεώρησης της ψυχοπαθολογίας. Στην πρώτη ενότητα, γίνεται μία σύντομη αναφορά στα πιο γνωστά θεωρητικά μοντέλα, το γνωστικό και το μοντέλο αυτορύθμισης, μιας και οι Gilbert και Trower προτείνουν το μοντέλο τους ως ένα πλαίσιο σύνδεσης και διεύρυνσής τους. Στη συνέχεια, περιγράφεται το εξελικτικό πλαίσιο θεώρησης του κοινωνικού άγχους και τα βασικά στοιχεία του ψυχοβιολογικού μοντέλου. Τέλος, παρουσιάζονται τα βασικά ερευνητικά ευρήματα και ερμηνεύονται βάσει του μοντέλου.
description: The aim of this paper is to draw a picture of Trower’s and Gilbert’s psychobiological model of social anxiety as well as to exam the basic research findings under the evolutionary point of view of psychopathology. The first part, presents a short report concerning the most known theoretical models, the cognitive and the self regulation model, as trower and gilbert propose their model as a frame that combine and expand them. The next part, describes the evolutionary theoretical frame of social anxiety and the basic components of psychobiological model. Finaly, the basic research findings are representing and interpreting in the context of the model.
Lattice QCD simulations with light dynamical quarks
Creators: name: Aoki, Sinya
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: I report recent results from full QCD simulations by CP-PACS and JLQCD collaborations.
description: 7 pages, 7 figures. Plenary talk given at "Quark Confinement and the Hadron Spectrum VII", Azores, Portugal, 2-7 September 2006
A geometric growth model interpolating between regular and small-world networks
Creators: name: Zhang, Zhongzhi
name: Zhou, Shuigeng
name: Wang, Zhiyong
name: Shen, Zhen
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We propose a geometric growth model which interpolates between one-dimensional linear graphs and small-world networks. The model undergoes a transition from large to small worlds. We study the topological characteristics by both theoretical predictions and numerical simulations, which are in good accordance with each other. Our geometrically growing model is a complementarity for the static WS model.
description: 10 pages, 6 figures
A Primary Noise Thermometer for Ultracold Bose Gases
Creators: name: Gati, R.
name: Esteve, J.
name: Hemmerling, B.
name: Ottenstein, T. B.
name: Appmeier, J.
name: Weller, A.
name: Oberthaler, M. K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We discuss in detail the experimental investigation of thermally induced fluctuations of the relative phase between two weakly coupled Bose-Einstein condensates. In analogy to superconducting Josephson junctions, the weak coupling originates from a tunneling process through a potential barrier which is obtained by trapping the condensates in an optical double-well potential. The observed fluctuations of the relative phase are in quantitative agreement with a many body two mode model at finite temperature. The agreement demonstrates the possibility of using the phase fluctuation measurements in a bosonic Josephson junction as a primary thermometer. This new method allows for measuring temperatures far below the critical temperature where standard methods based on time of flight measurements fail. We employ this new thermometer to probe the heat capacity of a degenerate Bose gas as a function of temperature.
description: 19 pages, 8 figures
Erratum - The many lives of AGN: cooling flows, black holes and the luminosities and colours of galaxies
Creators: name: Croton, Darren J.
name: Springel, Volker
name: White, Simon D. M.
name: De Lucia, G.
name: Frenk, C. S.
name: Gao, L.
name: Jenkins, A.
name: Kauffmann, G.
name: Navarro, J. F.
name: Yoshida, N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In Figure 6 we inadvertently labeled the proxy circular velocity as the virial velocity of the dark matter halo instead of what is actually plotted, the maximum circular velocity of the dark matter halo. The maximum halo circular velocity is a much better estimate of the disk V_c than is V_vir. This confusion influenced the discussion of the Tully-Fisher relation in our paper. In fact, Figure 6 demonstrates that it is possible to simultaneously reproduce both the local Tully-Fisher relation and luminosity function using semi-analytic techniques applied to the standard LCDM cosmology, thus contradicting previous studies of this issue and our own discussion in Section 3.6.
description: 1 page, accepted to MNRAS, erratum for MNRAS, 365, 11
High magnetic field phase diagram and weak FM breaking in (Ni0.93Co0.07)3V2O8
Creators: name: Wu, Jiating
name: Zhang, Minjie
name: Shi, Ke
name: Yin, Huxin
name: Han, Yuyan
name: Ling, Lansheng
name: Tong, Wei
name: Xi, Chuanying
name: Pi, Li
name: Wang, Zhaosheng
Publisher: name: arXiv
Year: 2024
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present magnetostriction and thermal expansion measurements on multiferroic (Ni0.93Co0.07)3V2O8. The high field phase diagrams up to 33 T along the a, b and c directions are built. For H//a, as the magnetic field increases, two intermediate phases appear between the incommensurate phase and the paramagnetic phase at about 7 K, and then a magnetically induced phase appears above the paramagnetic phase. For H//b,thermal expansion measurement indicates a mutation in the spin lattice coupling of the high field phases. The interlaced phase boundary suggests a mixed state in the optical high field phase. For H//c, an intermediate phase between the commensurate phase and the incommensurate phase is detected. A nonlinear boundary between the intermediate phase and the low temperature incommensurate phase, and a clear boundary between the commensurate phase and the paramagnetic phase are found. These results indicate that doping Co2+ breaks the weak ferromagnetic moment of the commensurate phase, which exists in the parent compound Ni3V2O8 and (Ni0.9Co0.1)3V2O8. This nonlinear influence reflects complicated spin modulation in Ni3V2O8 by doping Co2+.
description: 7 pages, 4 figures
Generating squeezing in an atom laser through self-interaction
Creators: name: Johnsson, Mattias T.
name: Haine, Simon A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We describe a scheme for creating quadrature- and intensity-squeezed atom lasers that do not require squeezed light as an input. The beam becomes squeezed due to nonlinear interactions between the atoms in the beam in an analogue to optical Kerr squeezing. We develop an analytic model of the process which we compare to a detailed stochastic simulation of the system using phase space methods. Finally we show that significant squeezing can be obtained in an experimentally realistic system and suggest ways of increasing the tunability of the squeezing.
description: v2. Incorporates changes due to referees' comments. We also demonstrate that our scheme generates number squeezing as well as quadrature squeezing
Microcanonical Approach to the Simulation of First-Order Phase Transitions
Creators: name: Martin-Mayor, V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: A generalization of the microcanonical ensemble suggests a simple strategy for the simulation of first order phase transitions. At variance with flat-histogram methods, there is no iterative parameters optimization, nor long waits for tunneling between the ordered and the disordered phases. We test the method in the standard benchmark: the Q-states Potts model (Q=10 in 2 dimensions and Q=4 in 3 dimensions), where we develop a cluster algorithm. We obtain accurate results for systems with more than one million of spins, outperforming flat-histogram methods that handle up to tens of thousands of spins.
description: 4 pages, 3 postscript figures
An investigation into the Efficient Market Hypothesis: a canonical correlation analysis approach
Creators: name: Smith, Daren McCrossan
Publisher: name: University of British Columbia
Year: 2009

description: In this thesis we will consider the Efficient Market Hypothesis (EMH). Fama (1970) defined three levels in which to test market efficiency: weak, semi-strong, and strong, each level depending on the particular set of information being used to assess efficiency. We will mainly address weak level efficiency in which the information set is past security data. Before the mid 1980's it was widely believed that the E M H was true at the weak and semi-strong levels. It was not until the pioneering work of Shiller (1984) and Summers (1986) that some doubt was cast on the E M H . They proposed an inefficient model in which prices consist of a sum of a random walk component and a stationary (predictable) component which represents the market valuation error. Since their initial conjecture about a stationary component in stock prices much effort has been spent in trying to determine if it exists and if it does, determining how much of the variations in stock prices it accounts for. To investigate this problem we will use a combination of data filtering, canonical correlation analysis, simulations and bootstrapping. Using industry price data obtained from the Toronto Stock Exchange over the period January 1956 to June 1995, we find some evidence against the EMH.
Διερεύνηση της αποτελεσματικότητας των τεχνικών στοιχείων που συμβάλλουν στην νίκη ή στην ήττα στην πετοσφαίριση: Διαχρονική μελέτη των ελληνικών πρωταθλημάτων Α1 ανδρών
Creators: name: Χαριτωνίδου, Μαρία Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Σερβίς
Επίθεση
Υποδοχή
Service
Attack
Reception

description: Σκοπός της έρευνας ήταν να διαπιστώσει ποια τεχνικά στοιχεία που εμπλέκονται στο παιχνίδι βοήθησαν τις ομάδες του Ελληνικού Πρωταθλήματος Α1 Ανδρών να κατακτήσουν τη νίκη ή σε αντίθετη περίπτωση η έλλειψή τους οδήγησε στην ήττα. Το δείγμα αποτέλεσαν 12 ομάδες που ανταγωνίστηκαν στα πλαίσια του Ελληνικού πρωταθλήματος κατά τη διάρκεια της περιόδου 2006-2007 και 2007-2008. Για τη διερεύνηση της αποτελεσματικότητας των τεχνικών στοιχείων που συμβάλλουν στην ήττα ή στη νίκη χρησιμοποιήθηκε το εγκεκριμένο από την Ελληνική ομοσπονδία πετοσφαίρισης πρόγραμμα στατιστικής ανάλυσης Data Professional της εταιρείας Data Project. Επιπρόσθετες στατιστικές αναλύσεις των αποτελεσμάτων πραγματοποιήθηκαν με την χρησιμοποίηση του στατιστικού πακέτου SPSS 17.0. Η Discriminant analysis χρησιμοποιήθηκε για να επιλέξει ποιο υποσύνολο των μεταβλητών συνέβαλε σημαντικά στην πρόβλεψη της νίκης ή ήττας ενός αγώνα, ενώ παράλληλα χρησιμοποιήθηκε η στατιστική ανάλυση one-way ANOVA 2X5. Τα αποτελέσματα έδειξαν για την αγωνιστική περίοδο 2006-2007 ότι «ο συνολικός αριθμός σερβίς», «οι συνολικές υποδοχές», «οι πόντοι από επίθεση» και τέλος «τα λάθη στην επίθεση μετά από αρνητική υποδοχή» οδήγησαν στην πρόβλεψη της έκβασης του αγώνα (νίκη – ήττα ενός αγώνα). Παράλληλα, τα αποτελέσματα έδειξαν για την αγωνιστική περίοδο 2007-2008 ότι «ο συνολικός αριθμός σερβίς», «οι συνολικές υποδοχές» και «οι πόντοι από επίθεση» οδήγησαν στην πρόβλεψη της έκβασης του αγώνα (νίκη – ήττα ενός αγώνα).
description: The scope of this research was to explore what technical elements involved in the game assisted teams participating in the Greek Men Championship (A1 Division) to win or, in the contrary, lead them to defeat. The sample consisted of 12 teams that completed in the framework of the Greek Championship during the 2006 – 2007 and 2007 – 2008 periods. For exploring effectiveness of technical elements leading to win or defeat the officially approved by the Greek Volleyball Federation statistical package “Data professional” was used.Additional statistical analyses were conducted with the SPSS 17.0. Statistical Package. Discriminant analysis was used in order to conclude on which variables analysis was used significantly in the correct prediction of a match outcome. Moreover, one – way ANOVA 2 x 5 analysis was also conducted. Research results showed that for the 2006 – 2007 period that variables : “total number of serves”, “total receptions”, “total attack points” and finally “attacks faults after bad reception”, lead to correct prediction of game outcome. Moreover, for the 2007 – 2008 period the variables “total number of serves”, “total receptions” and “attack points” were crucial for correct prediction of a game outcome.
Collapsing transition of spherical tethered surfaces with many holes
Creators: name: Koibuchi, Hiroshi
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We investigate a tethered (i.e. fixed connectivity) surface model on spherical surfaces with many holes by using the canonical Monte Carlo simulations. Our result in this paper reveals that the model has only a collapsing transition at finite bending rigidity, where no surface fluctuation transition can be seen. The first-order collapsing transition separates the smooth phase from the collapsed phase. Both smooth and collapsed phases are characterized by Hausdorff dimension H\simeq 2, consequently, the surface becomes smooth in both phases. The difference between these two phases can be seen only in the size of surface. This is consistent with the fact that we can see no surface fluctuation transition at the collapsing transition point. These two types of transitions are well known to occur at the same transition point in the conventional surface models defined on the fixed connectivity surfaces without holes.
description: 7 pages with 11 figures
Phonetic similarity influences learning word-object associations in 14-month-old infants
Creators: name: Stager, Christine Louise
Publisher: name: University of British Columbia
Year: 2009

description: This series of studies investigated the ability of 14-month-old infants to differentiate similar-sounding words in a word-object association task. Despite the remarkable speech perception abilities previously demonstrated in young infants, studies of word learning in older infants indicate they have difficulty learning similar-sounding words. This evidence suggests that infants may not be using their remarkable speech-perception abilities as they move into word learning. The purpose of my research was to test for evidence of the ability to form word-object associations for similar sounding words, at an early stage of word learning. Previous research has demonstrated infants are able to learn word-object associations for words that do not sound similar (Werker, Cohen, & Lloyd, 1995). The present studies used a similar design, in which infants are habituated to either one or two word-object pairings and are then tested with a pairing where either the object or the label is switched from those presented in the habituation phase. Across a series of three experiments it was demonstrated that infants notice when the switch that occurs is a switch in the object, but not when the switch is a switch in the label. This suggests older infants do have difficulty learning phonetically similar word-object associations.
When Do Stalled Stars Resume Spinning Down? Advancing Gyrochronology with Ruprecht 147
Creators: name: Curtis, Jason Lee
name: Agüeros, Marcel A.
name: Matt, Sean P.
name: Covey, Kevin R.
name: Douglas, Stephanie T.
name: Angus, Ruth
name: Saar, Steven H.
name: Cody, Ann Marie
name: Vanderburg, Andrew
name: Law, Nicholas M.
name: Kraus, Adam L.
name: Latham, David W.
name: Baranec, Christoph
name: Riddle, Reed
name: Ziegler, Carl
name: Lund, Mikkel N.
name: Torres, Guillermo
name: Meibom, Søren
name: Aguirre, Victor Silva
name: Wright, Jason T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Recent measurements of rotation periods ($P_\text{rot}$) in the benchmark open clusters Praesepe (670 Myr), NGC 6811 (1 Gyr), and NGC 752 (1.4 Gyr) demonstrate that, after converging onto a tight sequence of slowly rotating stars in mass$-$period space, stars temporarily stop spinning down. These data also show that the duration of this epoch of stalled spin-down increases toward lower masses. To determine when stalled stars resume spinning down, we use data from the $K2$ mission and the Palomar Transient Factory to measure $P_\text{rot}$ for 58 dwarf members of the 2.7-Gyr-old cluster Ruprecht 147, 39 of which satisfy our criteria designed to remove short-period or near-equal-mass binaries. Combined with the $Kepler$ $P_\text{rot}$ data for the approximately coeval cluster NGC 6819 (30 stars with $M_\star > 0.85$ M$_\odot$), our new measurements more than double the number of $\approx$2.5 Gyr benchmark rotators and extend this sample down to $\approx$0.55 M$_\odot$. The slowly rotating sequence for this joint sample appears relatively flat (22 $\pm$ 2 days) compared to sequences for younger clusters. This sequence also intersects the $Kepler$ intermediate period gap, demonstrating that this gap was not created by a lull in star formation. We calculate the time at which stars resume spinning down, and find that 0.55 M$_\odot$ stars remain stalled for at least 1.3 Gyr. To accurately age-date low-mass stars in the field, gyrochronology formulae must be modified to account for this stalling timescale. Empirically tuning a core$-$envelope coupling model with open cluster data can account for most of the apparent stalling effect. However, alternative explanations, e.g., a temporary reduction in the magnetic braking torque, cannot yet be ruled out.
description: 51 pages and 21 figures. Machine-readable tables for Ruprecht 147 and the Benchmark Clusters catalogs are included in arxiv source
Το μυστήριο της Θείας Οικονομίας στους αντιρρητικούς κατά Εικονομάχων λόγους του Αγίου Θεοδώρου του Στουδίτου:
Creators: name: Κοσμίδου, Ειρήνη Χαραλάμπους
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Θεόδωρος Στουδίτης
Εικονομαχία
Ενανθρώπηση
Theodore Studites
Iconoclastic controversy
Incarnation

description: Ο άγιος Θεόδωρος ο Στουδίτης έδρασε κατά την δεύτερη περίοδο της Εικονομαχίας (815-843). Το ερώτημα που κυριάρχησε την περίοδο αυτή από τους εικονομάχους ήταν τί ακριβώς απεικονίζει η εικόνα του Χριστού, την θεία ή την ανθρώπινη φύση; Ο άγιος Θεόδωρος στον αγώνα του υπέρ των εικόνων επιστράτευσε την διάκριση του δόγματος της Θεολογίας από αυτό της Οικονομίας και κατέδειξε ότι η εικόνα του Χριστού στηρίζεται στο δόγμα της ενσάρκωσης. Η εικόνα του Χριστού έχει σημείο αναφοράς το ανθρώπινο πρόσωπό Του και καταμαρτυρεί την ενανθρώπηση, γιατί παρουσιάζει το ανθρώπινο πρόσωπο του Χριστού ακριβώς όπως έγινε ορατό στον κόσμο. Ως άριστος δογματολόγος, στους τρείς Αντιρρητικούς Λόγους του, επισημαίνει την διδασκαλία της Ορθόδοξης Εκκλησίας για την υποστατική ένωση των δύο φύσεων του Χριστού. Για τον ίδιο, συνέπειες της ένωσης αυτής ήταν, μεταξύ άλλων, η δυνατότητα της περιγραφής του Χριστού καθώς και η μία προσκύνηση του Χριστού και της εικόνας Του.
description: St. Theodore the Studite acted during the second period of Iconoclasm (815-843). The question that dominated during that period was what does the image of Christ depicts: the divine or the human nature. St. Theodore in his struggle defending the images he adopted the doctrine of Theology than that of Economy and proved that the image of Christ is based on the doctrine of incarnation. The image of Christ has as reference point His human face and reveals the incarnation, since it presents Christ’s human face exactly as it was seen by the people. St. Theodore the Studite being an excellent dogmatist, in his Three Refutations, makes remarks of the Orthodox Church teaching regarding the hypostatic union of Christ’s two natures. For St. Theodore, the consequences of that union, among other, include Christ’s describable nature and also the one proskynesis of both Christ and His image.
Development of High Granulated Straw Chambers of Large Sizes
Creators: name: Davkov, V.
name: Davkov, K.
name: Myalkovskiy, V. V.
name: Naumann, L.
name: Peshekhonov, V. D.
name: Savenkov, A. A.
name: Viryasov, K. S.
name: Zhukov, I. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We have developed the baseline design for the straw drift tube tracking detectors for high rate environment application. The low-mass inner straw elements and the technology of the multianode straws assembly was devised and checked. The prototype chamber was constructed and studied the granularity of similar chambers can be reduced to one cm2. Submitted to Physics of Elementary Particles and Atomic Nuclei, Letters
description: 6 pages, 10 figures
Το Τεχνικό Επιμελητήριο Ελλάδος ως μη δικαιούχος διάδικος στην πολιτική δίκη
Creators: name: Αμπατζής, Ευστράτιος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Τεχνικό Επιμελητήριο Ελλάδος
Μη δικαιούχος διάδικος
Πολιτική δίκη
Technical Chamber of Greece
Action in one’s own name but on another’s behalf
Civil procedure

description: Αντικείμενο της παρούσας μελέτης είναι το Τεχνικό Επιμελητήριο Ελλάδος ως μη δικαιούχος διάδικος στην πολιτική δίκη. Εξετάζεται ειδικότερα εάν και σε ποιες περιπτώσεις αυτό έχει το δικαίωμα να ασκεί αγωγές για λογαριασμό του μηχανικού μέλους του. Επίσης, μεταξύ άλλων, αναλύονται ζητήματα που άπτονται δικονομικών θεσμών όπως το δεδικασμένο, η εκκρεμοδικία και η παρέμβαση.
description: The object of the present study is the Technical Chamber of Greece bringing an action on behalf of its member in civil procedure. The study specifically examines whether and in which occasions the TCG has the right to bring actions on behalf of its members. Furthermore, among others, it analyses matters related to procedural institutions such as the legal finality of a judgment (res iudicata), the pendency and the intervention.
Correlation based Multi-phasal models for improved imagined speech EEG recognition
Creators: name: Sharon, Rini A
name: Murthy, Hema A
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: Machine Learning (cs.LG)
subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Translation of imagined speech electroencephalogram(EEG) into human understandable commands greatly facilitates the design of naturalistic brain computer interfaces. To achieve improved imagined speech unit classification, this work aims to profit from the parallel information contained in multi-phasal EEG data recorded while speaking, imagining and performing articulatory movements corresponding to specific speech units. A bi-phase common representation learning module using neural networks is designed to model the correlation and reproducibility between an analysis phase and a support phase. The trained Correlation Network is then employed to extract discriminative features of the analysis phase. These features are further classified into five binary phonological categories using machine learning models such as Gaussian mixture based hidden Markov model and deep neural networks. The proposed approach further handles the non-availability of multi-phasal data during decoding. Topographic visualizations along with result-based inferences suggest that the multi-phasal correlation modelling approach proposed in the paper enhances imagined-speech EEG recognition performance.
Net-baryon number fluctuations
Creators: name: Schmidt, C.
name: Goswami, J.
name: Nicotra, G.
name: Ziesché, F.
name: Dimopoulos, P.
name: Di Renzo, F.
name: Singh, S.
name: Zambello, K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The appearance of large, none-Gaussian cumulants of the baryon number distribution is commonly discussed as a signal for the QCD critical point. We review the status of the Taylor expansion of cumulant ratios of baryon number fluctuations along the freeze-out line and also compare QCD results with the corresponding proton number fluctuations as measured by the STAR Collaboration at RHIC. To further constrain the location of a possible QCD critical point we discuss poles of the baryon number fluctuations in the complex plane. Here we use not only the Taylor coefficients obtained at zero chemical potential but perform also calculations of Taylor expansion coefficients of the pressure at purely imaginary chemical potentials.
description: 10 pages, 5 figures, talk presented at the Workshop "Criticality in QCD and the Hadron Resonance Gas", 29-31 July 2020, Online
Partially directed paths in a wedge
Creators: name: van Rensburg, E. J. Janse
name: Prellberg, T.
name: Rechnitzer, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05A15

description: The enumeration of lattice paths in wedges poses unique mathematical challenges. These models are not translationally invariant, and the absence of this symmetry complicates both the derivation of a functional recurrence for the generating function, and solving for it. In this paper we consider a model of partially directed walks from the origin in the square lattice confined to both a symmetric wedge defined by $Y = \pm pX$, and an asymmetric wedge defined by the lines $Y= pX$ and Y=0, where $p > 0$ is an integer. We prove that the growth constant for all these models is equal to $1+\sqrt{2}$, independent of the angle of the wedge. We derive functional recursions for both models, and obtain explicit expressions for the generating functions when $p=1$. From these we find asymptotic formulas for the number of partially directed paths of length $n$ in a wedge when $p=1$. The functional recurrences are solved by a variation of the kernel method, which we call the ``iterated kernel method''. This method appears to be similar to the obstinate kernel method used by Bousquet-Melou. This method requires us to consider iterated compositions of the roots of the kernel. These compositions turn out to be surprisingly tractable, and we are able to find simple explicit expressions for them. However, in spite of this, the generating functions turn out to be similar in form to Jacobi $θ$-functions, and have natural boundaries on the unit circle.
description: 26 pages, 5 figures. Submitted to JCTA
Silicate Dust in Evolved Protoplanetary Disks: Growth, Sedimentation, and Accretion
Creators: name: Sicilia-Aguilar, Aurora
name: Hartmann, L. W.
name: Watson, Dan
name: Bohac, Chris
name: Henning, Thomas
name: Bouwman, Jeroen
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the Spitzer IRS spectra for 33 young stars in Tr 37 and NGC 7160. The sample includes the high- and intermediate-mass stars with MIPS 24 microns excess, the only known active accretor in the 12 Myr-old cluster NGC 7160, and 19 low-mass stars with disks in the 4 Myr-old cluster Tr 37. We examine the 10 microns silicate feature, present in the whole sample of low-mass star and in 3 of the high- and intermediate-mass targets, and we find that PAH emission is detectable only in the Herbig Be star. We analyze the composition and size of the warm photospheric silicate grains by fitting the 10 microns silicate feature, and study the possible correlations between the silicate characteristics and the stellar and disk properties (age, SED slope, accretion rate, spectral type). We find indications of dust settling with age and of the effect of turbulent enrichment of the disk atmosphere with large grains. Crystalline grains are only small contributors to the total silicate mass in all disks, and do not seem to correlate with any other property, except maybe binarity. We also observe that spectra with very weak silicate emission are at least 3 times more frequent among M stars than among earlier spectral types, which may be an evidence of inner disk evolution. Finally, we find that 5 of the high- and intermediate-mass stars have SEDs and IRS spectra consistent with debris disk models involving planet formation, which could indicate debris disk formation at ages as early as 4 Myr.
description: 54 pages, 21 figures
Single-Pixel Pattern Recognition with Coherent Nonlinear Optics
Creators: name: Bu, Ting
name: Kumar, Santosh
name: Zhang, He
name: Huang, Irwin
name: Huang, Yuping
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Image and Video Processing (eess.IV)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We propose and experimentally demonstrate a nonlinear-optics approach to pattern recognition with single-pixel imaging and deep neural network. It employs mode selective image up-conversion to project a raw image onto a set of coherent spatial modes, whereby its signature features are extracted nonlinear-optically. With 40 projection modes, the classification accuracy reaches a high value of 99.49% for the MNIST handwritten digit images, and up to 95.32% even when they are mixed with strong noise. Our experiment harnesses rich coherent processes in nonlinear optics for efficient machine learning, with potential applications in online classification of large size images, fast lidar data analyses, complex pattern recognition, and so on.
description: 5 pages, 5 figures
A scheme for unconventional geometric quantum computation in cavity QED
Creators: name: Feng, Xun-Li
name: Wang, Zisheng
name: Wu, Chunfeng
name: Kwek, L. C.
name: Oh, C. H.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a scheme for implementing the unconventional geometric two-qubit phase gate with nonzero dynamical phase by using the two-channel Raman interaction of two atoms in a cavity. We show that the dynamical phase acquired in a cyclic evolution is proportional to the geometric phase acquired in the same cyclic evolution, hence the the total phase possesses the same geometric features as the geometric phase. In our scheme the atomic excited state is adiabatically eliminated and the operation of the proposed logic gate involves only in the metastable states of the atom and hence is not affected by spontaneous emission.
description: 4 pages, 1 figure
Initial Reports of the Deep Sea Drilling Project - Volume 77
Creators: name: Buffler, R.T.
name: Schlager, W.
name: The Leg 77 Science Party
Publisher: name: U.S. Government Printing Office
Year: 1984
Subjects: Deep Sea Drilling Project
Glomar Challenger
DSDP
Leg 77
Site 535
Site 536
Site 537
Site 538
Site 539
Site 540
Gulf of Mexico
Straits of Florida
Gulf Basin
Florida Bank
Yucatan Basin
Campeche Bank

description: This volume covers Leg 77 of the cruises of the Drilling Vessel Glomar Challenger. The drilling of Leg 77 in the southeastern Gulf of Mexico, western Straits of Florida is part of an overall program by the JOIDES Passive Margin Panel to study the evolution of the western North Atlantic passive margin. The nature and origin of the transitional crust and the overlying Mesozoic sedimentary sequences in the southeastern Gulf was the main objective of Leg 77. By drilling these rocks, it is possible to test, at least in part, the model for the early evolution of the Gulf basin. It also should provide information about the geologic history of adjoining provinces such as the Florida Bank, the Straits of Florida-Bahamas area, Cuba, the Yucatan Basin, and the Campeche Bank. More specifically, some of the general problems that these holes address include: 1) the tectonic evolution of the southeastern Gulf of Mexico and how it relates to the formation of the deep Gulf basin; 2) the nature, age, and origin of (a) the rifted basement (transitional crust) beneath the southeastern Gulf, (b) the synrift sediments associated with tilted basement blocks; and (c) the postrift pre-mid-Cretaceous sedimentary sequence of the southeastern Gulf; 3) a comparison between deep Gulf of Mexico sedimentation and deep North Atlantic Basin sedimentation, and the determination of the time at which the Straits of Florida opened up as a seaway between the Gulf and the Atlantic; 4) a key link for the Mesozoic paleogeography, paleoenvironments, and paleoceanography of the region; 5) the structural history of the southeastern Gulf and how it affected sedimentation; 6) the subsidence and thermal history of the southeastern Gulf; 7) the nature, age, and origin of the prominent mid-Cretaceous unconformity in the area; 8) The post-mid-Cretaceous sedimentary and paleoceanographic history of the western Straits of Florida. Taken a step further, the above objectives are part of the larger question of the early Mesozoic continent assembly and the low-latitude connection of Tethys and the Pacific. Leg 77 began in Ft. Lauderdale, Florida in December 1980 and ended in San Juan, Puerto Rico in February 1981.
Tidal torques. A critical review of some techniques
Creators: name: Efroimsky, Michael
name: Williams, James G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: Classical Physics (physics.class-ph)
subject: Geophysics (physics.geo-ph)
subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: We point out that the MacDonald formula for body-tide torques is valid only in the zeroth order of e/Q, while its time-average is valid in the first order. So the formula cannot be used for analysis in higher orders of e/Q. This necessitates corrections in the theory of tidal despinning and libration damping. We prove that when the inclination is low and phase lags are linear in frequency, the Kaula series is equivalent to a corrected version of the MacDonald method. The correction to MacDonald's approach would be to set the phase lag of the integral bulge proportional to the instantaneous frequency. The equivalence of descriptions gets violated by a nonlinear frequency-dependence of the lag. We explain that both the MacDonald- and Darwin-torque-based derivations of the popular formula for the tidal despinning rate are limited to low inclinations and to the phase lags being linear in frequency. The Darwin-torque-based derivation, though, is general enough to accommodate both a finite inclination and the actual rheology. Although rheologies with Q scaling as the frequency to a positive power make the torque diverge at a zero frequency, this reveals not the impossible nature of the rheology, but a flaw in mathematics, i.e., a common misassumption that damping merely provides lags to the terms of the Fourier series for the tidal potential. A hydrodynamical treatment (Darwin 1879) had demonstrated that the magnitudes of the terms, too, get changed. Reinstating of this detail tames the infinities and rehabilitates the "impossible" scaling law (which happens to be the actual law the terrestrial planets obey at low frequencies).
description: arXiv admin note: sections 4 and 9 of this paper contain substantial text overlap with arXiv:0712.1056
title: Τεχνικές για αξιόπιστα συστήματα παρακολούθησης
titleType: AlternativeTitle
title: Techniques for reliable surveillance systems
Creators: name: Lalos, Constantinos G.
Publisher: name: National Technological University of Athens
Year: 2014
Subjects: Όραση υπολογιστών
Συστήματα παρακολούθησης
Μέθοδοι μηχανών μάθησης
Ανίχνευση αντικειμένων
Αλγόριθμοι
Computer vision
Surveillance systems
Machine learning
Object detection
Algorithms

description: 169 σ.
description: Τα συστήματα παρακολούθησης έχουν σημαντικό ρόλο στις εφαρμογές ανίχνευσης συμβάντων και ανάλυσης. Ωστόσο, οι τεχνικές παρακολούθησης αντικειμένων εξακολουθούν να είναι μία από τις μεγαλύτερες προκλήσεις στον τομέα της όρασης υπολογιστών, παρόλο που έχουν μελετηθεί εκτενώς κατά τη διάρκεια των προηγούμενων ετών. Στην παρούσα διατριβή, παρουσιάζεται η ροή αντικείμενου, η οποία χρησιμοποιείται για την εκτίμηση της μετατόπισης και της κατεύθυνσης ενός συγκεκριμένου αντικειμένου. Σε σύγκριση με τις τεχνικές ανίχνευσης και παρακολούθησης, η προτεινόμενη προσέγγιση μπορεί να υπολογίσει την κατεύθυνση του αντικειμένου με απευθείας τρόπο, ενώ παράλληλα μπορεί να αγνοεί άλλες άσχετες κινήσεις μέσα στην σκηνή. Ως εκ τούτου, η ροή αντικείμενου έχει τη δυνατότητα να εστιάζει συνεχώς σε ένα συγκεκριμένο αντικείμενο και να υπολογίζει το πεδίο της κίνησης του. Επίσης, η ροή αντικείμενου ενσωματώνεται σε μία αξιόπιστη προσέγγιση παρακολούθησης, η οποία χρησιμοποιεί ένα παραγωγικό prior, με στόχο να αντιμετωπίσει τις αλλαγές της εμφάνισης ενός αντικειμένου. Επιπλέον, προτείνεται ένας μηχανισμός επαλήθευσης δείγματος πραγματικού χρόνου. Η αποτελεσματικότητα της προτεινόμενης μεθόδου παρουσιάζεται σε ποικίλες ακολουθίες, όπως σε ένα σύνθετο βιομηχανικό περιβάλλον. Τα πειραματικά αποτελέσματα δείχνουν ότι η προτεινόμενη τεχνική είναι αξιόπιστη και έχει καλύτερη απόδοση από άλλες μοντέρνες τεχνικές παρακολούθησης αντικειμένων.
description: Camera based supervision is a critical part of event detection and analysis applications. However, visual tracking still remains one of the biggest challenges in the area of computer vision, although it has been extensively discussed during in the previous years. In this thesis, object flow is introduced, for estimating both the displacement and the direction of an object-of-interest. Compared to the detection and tracking techniques, the proposed approach obtains the object displacement directly, while ignoring other irrelevant movements in the scene. Hence, object flow has the ability to continuously focus on a specific object and calculate its motion field. A robust tracking approach based on object flow and an observation model that utilizes a generative prior are adopted to tackle the pitfalls that derive from the appearance changes of the object-of-interest. In addition, an on-line sample verification mechanism is proposed. The efficiency of the proposed technique is demonstrated on various sequences, such as a complex industrial environment. The experimental results show that the proposed technique is sound, yielding improved performance in comparison with other tracking approaches.
Graph Convolutional Neural Networks for Body Force Prediction
Creators: name: Ogoke, Francis
name: Meidani, Kazem
name: Hashemi, Amirreza
name: Farimani, Amir Barati
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Many scientific and engineering processes produce spatially unstructured data. However, most data-driven models require a feature matrix that enforces both a set number and order of features for each sample. They thus cannot be easily constructed for an unstructured dataset. Therefore, a graph based data-driven model to perform inference on fields defined on an unstructured mesh, using a Graph Convolutional Neural Network (GCNN) is presented. The ability of the method to predict global properties from spatially irregular measurements with high accuracy is demonstrated by predicting the drag force associated with laminar flow around airfoils from scattered velocity measurements. The network can infer from field samples at different resolutions, and is invariant to the order in which the measurements within each sample are presented. The GCNN method, using inductive convolutional layers and adaptive pooling, is able to predict this quantity with a validation $R^{2}$ above 0.98, and a Normalized Mean Squared Error below 0.01, without relying on spatial structure.
Determination of Stellar Ellipticities in Future Microlensing Surveys
Creators: name: Han, Cheongho
name: Chang, Heon-Young
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We propose a method that can determine the ellipticities of source stars of microlensing events produced by binary lenses. The method is based on the fact that the products of the caustic-crossing timescale, $Δt$, and the cosine of the caustic incidence angle of the source trajectory, $κ$, of the individual caustic crossings are different for events involving an elliptical source, while the products are the same for events associated with a circular source. The product $Δt_\perp =Δt \cosκ$ corresponds to the caustic-crossing timescale when the incidence angle of the source trajectory is $κ=0$. For the unique determination of the source ellipticity, resolutions of at least three caustic crossings are required. Although this requirement is difficult to achieve under the current observational setup based on alert/follow-up mode, it will be possible with the advent of future lensing experiments that will survey wide fields continuously at high cadence. For typical Galactic bulge events, the difference in $Δt_\perp$ between caustic crossings is of the order of minutes depending on the source orientations and ellipticities. Considering the monitoring frequency of the future lensing surveys of $\sim 6$ times/hr and the improved photometry especially of the proposed space-based survey, we predict that ellipticity determinations by the proposed method will be possible for a significant fraction of multiple caustic-crossing binary lens events involving source stars having non-negligible ellipticities.
description: 6 pages, 4 figures, ApJ, submitted
Long-term power-law fluctuation in Internet traffic
Creators: name: Tadaki, Shin-ichi
Publisher: name: arXiv
Year: 2006
Subjects: subject: Physics and Society (physics.soc-ph)
subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: Power-law fluctuation in observed Internet packet flow are discussed. The data is obtained by a multi router traffic grapher (MRTG) system for 9 months. The internet packet flow is analyzed using the detrended fluctuation analysis. By extracting the average daily trend, the data shows clear power-law fluctuations. The exponents of the fluctuation for the incoming and outgoing flow are almost unity. Internet traffic can be understood as a daily periodic flow with power-law fluctuations.
description: 10 pages, 8 figures