cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Celestial Amplitudes from UV to IR
Creators: name: Arkani-Hamed, Nima
name: Pate, Monica
name: Raclariu, Ana-Maria
name: Strominger, Andrew
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Celestial amplitudes represent 4D scattering of particles in boost, rather than the usual energy-momentum, eigenstates and hence are sensitive to both UV and IR physics. We show that known UV and IR properties of quantum gravity translate into powerful constraints on the analytic structure of celestial amplitudes. For example the soft UV behavior of quantum gravity is shown to imply that the exact four-particle scattering amplitude is meromorphic in the complex boost weight plane with poles confined to even integers on the negative real axis. Would-be poles on the positive real axis from UV asymptotics are shown to be erased by a flat space analog of the AdS resolution of the bulk point singularity. The residues of the poles on the negative axis are identified with operator coefficients in the IR effective action. Far along the real positive axis, the scattering is argued to grow exponentially according to the black hole area law. Exclusive amplitudes are shown to simply factorize into conformally hard and conformally soft factors. The soft factor contains all IR divergences and is given by a celestial current algebra correlator of Goldstone bosons from spontaneously broken asymptotic symmetries. The hard factor describes the scattering of hard particles together with the boost-eigenstate clouds of soft photons or gravitons required by asymptotic symmetries. These provide an IR safe $\mathcal{S}$-matrix for the scattering of hard particles.
description: 43 pages
"Garbage Archaeology" in Carnuntum. Erste Überlegungen zu Tierknochen und deren Rolle als Schlüssel zur Rekonstruktion menschlichen Handelns
Creators: name: Kirchengast, Nisa Iduna
Publisher: name: Zenodo
Year: 2019
Subjects: subject: zooarchaeology
subject: classical archaeology
subject: Roman provincial archaeology
subject: Petronell/Carnuntum
subject: Lower Austria
subject: GIS
subject: http://vocab.getty.edu/page/aat/300251929
subject: http://vocab.getty.edu/page/aat/300054331

description: This working paper provides a first glimpse into current and future planned archaeozoological investigations in the Roman site of Petronell/Carnuntum (Lower Austria), which are carried out as part of a master's thesis at the Department of Classical Archeology at the University of Vienna. Selected samples of animal remains from the building unit "Haus 2" in the Roman civilian city of Carnuntum are analyzed and evaluated. As a preliminary result, the paper gives first insights into the possibilities of gathering new knowledge through analyzing ancient bone material with regard to deposition processes. Particular attention is paid to the reconstruction of possible economic production processes.
description: This report is a working paper that provides first insights into a master's thesis (supervised by Univ.-Prof Dr. Günther Schörner and Mag. Dr. Günther Karl Kunst) at the Department of Classical Archeology. The contents of this paper were presented as a poster presentation at the 17. Österreichischer Archäologentag 2018 at the University of Salzburg.
Απόψεις και αντιλήψεις των εκπαιδευτικών της πρωτοβάθμιας εκπαίδευσης σχετικά με την διαπολιτισμική εκπαίδευση:
Creators: name: Αποστολίδου, Χρυσούλα Βύρωνος-Κώστα
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Διαπολιτισμική εκπαίδευση
Μοντέλο Ενδυνάμωσης Cummins
Στρατηγικές, αρχές, μέθοδοι Διαπολιτισμικής διδασκαλίας
Multicultural education
Model of empowerment-Cummins
Strategies, principles, methods of intercultural learning

description: Διεθνείς έρευνες σε πολλές χώρες έχουν καταδείξει το γεγονός ότι τα εκπαιδευτικά συστήματα δεν είναι το ίδιο αποτελεσματικά σε όλα τα παιδιά, αυτό παρατηρείται συχνά και σε παιδιά που ανήκουν σε ομάδες διαφόρων μειονοτήτων, τα οποία βρίσκονται σε μειονεκτικότερη θέση σε σχέση με τα παιδιά της κυρίαρχης ομάδας. Στην εισήγηση μου θα προσπαθήσω να σκιαγραφήσω τις απόψεις και αντιλήψεις των εκπαιδευτικών της πρωτοβάθμιας εκπαίδευσης σχετικά με τη Διαπολιτισμική Εκπαίδευση. Μέσα από την ανάλυση στοιχείων από μια έρευνα, η οποία πραγματοποιήθηκε σε επτά Δημοτικά Σχολεία του νομού Δράμας και στην οποία συμμετείχαν 104 εκπαιδευτικοί, θα υποστηρίξω τη θέση ότι η Διαπολιτισμική Εκπαίδευση μπορεί να βοηθήσει τους εκπαιδευτικούς στην καλύτερη διαχείριση μιας πολιτισμικής τάξης.
description: International surveys in many countries have demonstrated the fact that educational systems are not equally effective to all children especially to the minority group children that are in a less favorable positive position when compared with children from the local families. In my presentation I intend to examine the beliefs and attitudes of the primary school teachers related to multicultural education. Drawing on some findings from a study that took place in seven primary schools of Drama with the participation of 104 teachers I will support that the multicultural education can help teachers to manage better the multicultural primary school classes. (Another important finding of this study is the fact that trained on multicultural education teachers have more positive attitudes to teach diverse student population.)
Large enhancement of the thermopower in Na$_x$CoO$_2$ at high Na doping
Creators: name: Lee, Minhyea
name: Viciu, Liliana
name: Li, Lu
name: Wang, Yayu
name: Foo, M. L.
name: Watauchi, S.
name: Pascal, R. A.
name: Cava, R. J.
name: Ong, N. P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Research on the oxide perovskites has uncovered electronic properties that are strikingly enhanced compared with those in conventional metals. Examples are the high critical temperatures of the cuprate superconductors and the colossal magnetoresistance in the manganites. The conducting layered cobaltate $\rm Na_xCoO_2$ displays several interesting electronic phases as $x$ is varied including water-induced superconductivity and an insulating state that is destroyed by field. Initial measurements showed that, in the as-grown composition, $\rm Na_xCoO_2$ displays moderately large thermopower $S$ and conductivity $σ$. However, the prospects for thermoelectric cooling applications faded when the figure of merit $Z$ was found to be small at this composition (0.6$$0.75, $S$ undergoes an even steeper enhancement. At the critical doping $x_p\sim$ 0.85, $Z$ (at 80 K) reaches values $\sim$40 times larger than in the as-grown crystals. We discuss prospects for low-temperature thermoelectric applications.
description: 6 pages, 7 figures
Iliad Pilot 07.01 demonstration from '24 review meeting
Creators: name: Brönner, Ute
name: Nepstad, Raymond
Publisher: name: Zenodo
Year: 2024

description: The pilot for Smart monitoring in aquaculture builds on Iliad pilot 03 by using numerical modelling to asses dispersion of pollution in the ocean. This pilot transports numerical particles to assess contact between aquaculture locations based on public social-economic and metocean data.

The results can be used as proxy for infection networks etc. but should be based on a more suitable transport model in these cases.

The presentation is a recorded demonstration from the 2024 project review meeting.
Τρισδιάστατη αποτύπωση του Ι.Ν. της Παναγίας Αχειροποιήτου Θεσσαλονίκης με Laser Scanner
Creators: name: Τσερπέλη, Εμμανουέλα Παναγιώτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Αχειροποίητος
Αποτύπωση
Τρισδιάστατος σαρωτής
Acheiropoietos
Survey
Laser scanner

description: Σκοπός της παρούσας διπλωματικής είναι η τοπογραφική αποτύπωση με laser scanner του Ιερού Ναού της Παναγίας Αχειροποιήτου στη Θεσσαλονίκη εσωτερικά και εξωτερικά, με αποτέλεσμα τη δημιουργία του τρισδιάστατου μοντέλου και μιας σειράς σχεδίων του ναού. Αρχικά αναφέραμε κάποια ιστορικά στοιχεία του ναού και περιγράφηκε η αρχιτεκτονική του. Στη συνέχεια περιγράφηκαν οι μέθοδοι αποτύπωσης μνημείων και αναλύθηκε σε ξεχωριστό κεφάλαιο η μέθοδος αποτύπωσης με το laser scanner. Περιγράφηκε η αρχή λειτουργίας του, η μέθοδος των μετρήσεων και ο τρόπος επεξεργασίας των δεδομένων. Στα επόμενα κεφάλαια αναφερθήκαμε αναλυτικά στη διαδικασία που ακολουθήσαμε κατά την αποτύπωση της Αχειροποιήτου - μετρήσεις στο πεδίο και επεξεργασία των δεδομένων στο γραφείο με τα διάφορα λογισμικά. Το τελικό αποτέλεσμα της επεξεργασίας είναι μια σειρά σχεδίων σε μορφή εικόνας: κάτοψη, κάτοψη γυναικωνιτών, τέσσερις τομές, τέσσερις όψεις, η άνοψη και το ψηφιδωτό δάπεδο του βορείου κλίτους. Όλες αυτές οι εικόνες έχουν εισαχθεί στο Autocad υπό κλίμακα και έγινε γραμμική απόδοση στην κάτοψη ισογείου, σε μία κατά μήκος τομή, στη βόρεια και στη δυτική όψη.
description: The aim of the current thesis is the topographic survey with laser scanner of the church of Panagia Acheiropoietos in Thessaloniki, indoor and outdoor, in order to create the three-dimensional model and a series of drawings of the temple. At the beginning we mention some historical information of the church and describe its architecture. We describe in general about the methods of surveying monuments and we analyze in a separate chapter about the method of laser scanner. In the next chapters we analyze the procedure we followed for the survey of Acheiropoietos- the field measurements and the data processing at the office by using different kinds of software. The result of the process is a number of drawings exported as image files: floor plan, plan of the upper galleries, four sections, four elevations, roof plan and the mosaic floor of the south side. All these pictures were imported into AutoCAD at the correct scale and we designed the floor plan, one longitudinal section, the north elevation and west elevation.
LAMOST/HRS Spectroscopic Analysis of Two New Li-rich Giants
Creators: name: Zhou, Zeming
name: Shi, Jianrong
name: Yan, Hongliang
name: Hou, Yonghui
name: Zhang, Kai
name: Gao, Qi
name: Xu, Xiaodong
name: Yuan, Hailong
name: Zhou, Yutao
name: Pan, Kaike
name: Sang, Ziye
name: Zhao, Yongheng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Two Li-rich candidates, TYC 1338-1410-1 and TYC 2825-596-1, were observed with the new high-resolution echelle spectrograph, LAMOST/HRS. Based on the high-resolution and high-signal-to-noise ratio (SNR) spectra, we derived stellar parameters and abundances of 14 important elements for the two candidates. The stellar parameters and lithium abundances indicate that they are Li-rich K-type giants, and they have A(Li)$_\mathrm{NLTE}$ of 1.77 and 2.91 dex, respectively. Our analysis suggests that TYC 1338-1410-1 is likely a red giant branch (RGB) star at the bump stage, while TYC 2825-596-1 is most likely a core helium-burning red clump (RC) star. The line profiles of both spectra indicate that the two Li-rich giants are slow rotators and do not show infrared (IR) excess. We conclude that engulfment is not the lithium enrichment mechanism for either star. The enriched lithium of TYC 1338-1410-1 could be created via Cameron-Fowler mechanism, while the lithium excess in TYC 2825-596-1 could be associated with either non-canonical mixing processes or He-flash.
description: 12 pages, 5 figures, to be published in Research in Astronomy and Astrophysics
Integrating the building blocks of agronomy and biocontrol into an IPM strategy for wheat stem sawfly
Creators: name: Beres, Brian L.; Cárcamo, Héctor A.; Weaver, David K.; Dosdall, Lloyd M.; Evenden, Maya L.; Hill, Bernard D.; McKenzie, Ross H.; Yang, Rong-Cai; Spaner, Dean M.
Publisher: name: University of Alberta Libraries
Year: 2011

Abstract
Space-time codes with controllable ML decoding complexity for any number of transmit antennas
Creators: name: Sharma, Naresh
name: Pinnamraju, Pavan R.
name: Papadias, Constantinos B.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We construct a class of linear space-time block codes for any number of transmit antennas that have controllable ML decoding complexity with a maximum rate of 1 symbol per channel use. The decoding complexity for $M$ transmit antennas can be varied from ML decoding of $2^{\lceil \log_2M \rceil -1}$ symbols together to single symbol ML decoding. For ML decoding of $2^{\lceil \log_2M \rceil - n}$ ($n=1,2,...$) symbols together, a diversity of $\min(M,2^{\lceil \log_2M \rceil-n+1})$ can be achieved. Numerical results show that the performance of the constructed code when $2^{\lceil \log_2M \rceil-1}$ symbols are decoded together is quite close to the performance of ideal rate-1 orthogonal codes (that are non-existent for more than 2 transmit antennas).
description: 5 pages, to appear in ISIT, June 2007, Nice, France
Algebraic and geometric structures of Special Relativity
Creators: name: Giulini, Domenico
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences
subject: 83A05

description: I review, some of the algebraic and geometric structures that underlie the theory of Special Relativity. This includes a discussion of relativity as a symmetry principle, derivations of the Lorentz group, its composition law, its Lie algebra, comparison with the Galilei group, Einstein synchronization, the lattice of causally and chronologically complete regions in Minkowski space, rigid motion (the Noether-Herglotz theorem), and the geometry of rotating reference frames. Representation-theoretic aspects of the Lorentz group are not included. A series of appendices present some related mathematical material.
description: 66 pages, 4 figures; v2 references added, misprints corrected
The relativity of indeterminacy
Creators: name: Del Santo, Flavio
name: Gisin, Nicolas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: A long-standing tradition, largely present in both the physical and the philosophical literature, regards the advent of (special) relativity -- with its block-universe picture -- as the failure of any indeterministic program in physics. On the contrary, in this paper, we note that upholding reasonable principles of finiteness of information hints at a picture of the physical world that should be both relativistic and indeterministic. We thus rebut the block-universe picture by assuming that fundamental indeterminacy itself should as well be regarded as a relational property when considered in a relativistic scenario. We discuss the consequence that this view may have when correlated randomness is introduced, both in the classical case and in the quantum one.
description: 6 pages, 3 figures
Classical Two-parabolic T-Schottky groups
Creators: name: Gilman, Jane
name: Waterman, Peter
Publisher: name: arXiv
Year: 2007
Subjects: subject: Geometric Topology (math.GT)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 14H15, 30F40, 32G15, 14H55,20H10,30F10;57M60; 14H10

description: A $T$-Schottky group is a discrete group of Möbius transformations whose generators identify pairs of, possibly-tangent, Jordan curves on the complex sphere, ${\hat{\IC}}$. If the curves are Euclidean circles then the group is termed classical $T$-Schottky. We describe the boundary of the space of classical $T$-Schottky groups affording two parabolic generators within the larger parameter space of all $T$-Schottky groups with two parabolic generators. This boundary is surprisingly different from that of the larger space. It is analytic while the boundary of the larger space appears to be fractal. Approaching the boundary of the smaller space does not correspond to pinching, circles necessarily become tangent but extra parabolics need not develop. As an application we construct an explicit one parameter family of two parabolic generator non-classical $T$-Schottky groups.
description: one pdf file
Towards a Topological Quantum Chemistry description of correlated systems: the case of the Hubbard diamond chain
Creators: name: Iraola, Mikel
name: Heinsdorf, Niclas
name: Tiwari, Apoorv
name: Lessnich, Dominik
name: Mertz, Thomas
name: Ferrari, Francesco
name: Fischer, Mark H.
name: Winter, Stephen M.
name: Pollmann, Frank
name: Neupert, Titus
name: Valentí, Roser
name: Vergniory, Maia G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The recently introduced topological quantum chemistry (TQC) framework has provided a description of universal topological properties of all possible band insulators in all space groups based on crystalline unitary symmetries and time reversal. While this formalism filled the gap between the mathematical classification and the practical diagnosis of topological materials, an obvious limitation is that it only applies to weakly interacting systems-which can be described within band theory. It is an open question to which extent this formalism can be generalized to correlated systems that can exhibit symmetry protected topological phases which are not adiabatically connected to any band insulator. In this work we address the many facettes of this question by considering the specific example of a Hubbard diamond chain. This model features a Mott insulator, a trivial insulating phase and an obstructed atomic limit phase. Here we discuss the nature of the Mott insulator and determine the phase diagram and topology of the interacting model with infinite density matrix renormalization group calculations, variational Monte Carlo simulations and with many-body topological invariants. We then proceed by considering a generalization of the TQC formalism to Green's functions combined with the concept of topological Hamiltonian to identify the topological nature of the phases, using cluster perturbation theory to calculate the Green's functions. The results are benchmarked with the above determined phase diagram and we discuss the applicability and limitations of the approach and its possible extensions.
description: 16 pages, 13 figures
Maximum mass of hybrid star formed via shock induced phase transition in cold neutron stars
Creators: name: Mallick, Ritam
name: Singh, Shailendra
name: Nandi, Rana
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: This article studies the maximum mass limit of the quark star formed after the shock-induced phase transition of a cold neutron star. By employing hadronic and quark equation of state that satisfies the current mass bound, we use combustion adiabat conditions to find such a limit. The combustion adiabat condition results in a local or a global maximum pressure at an intermediate density range. The maximum pressure corresponds to a local or global maximum mass for the phase transformed hybrid star. The phase transition is usually exothermic if we have a local maximum mass. The criteria for exothermic or endothermic phase transition depend on whether the quark pressure/energy ratios to nuclear pressure/energy are smaller or greater than 1. We find that exothermic phase transition in a cold neutron star usually results in hybrid stars whose mass is smaller than a parent neutron star. The phase transition is endothermic for a global maximum pressure; thereby, one gets a global maximum mass. Hybrid stars much massive than phase transformed local maximum mass can be formed, provided there is some external energy source during the phase transition process. However, for some cases, even massive hybrid stars can form with exothermic phase transition for EoSs having global maximum pressure.
description: 10 pages, 4 figures, 4 tables
Teachers’ responses to students with behavior problems : attributions, affect and interventions
Creators: name: Robinson, Georgina McIver
Publisher: name: University of British Columbia
Year: 2009

description: School psychologists are often called upon to act as consultants for teachers in the development of intervention plans for students with behavioral difficulties in the classroom. Information about the antecedents which may influence teacher behavior (i.e., response and interventions), especially with regard to students with behavioral difficulties can be valuable for the psychologist to use in the development of the intervention plan. The purpose of this study was to examine teachers' causal attributions, affective reactions and behavioral responses (in the form of classroom interventions) from the theoretical perspectives of Weiner's attribution theory (1995) and Bandura's self-efficacy theory (1977). A primary assumption of the study was that teachers are responding to natural attributions (mediated by affect) when they intervene with students with behavioral difficulties in the classroom, and that teachers respond differently to students depending on the type of behavior problem. Participants were 112 preservice elementary teachers at the end of a two year training program. Teachers were given one of three student-descriptions and vignettes depicting a student with defiant, hyperactive, or social rejection behavior difficulties. Measures included the Problem Behavior Scale (attributions), The Teacher Emotion Questionnaire, and the Teacher Interventions Rating Scale. Results of analyses of variance and t-tests suggest different patterns of responses to each ofthe three problem-behavior students and significant differences by case on many of the dimensions measured. Correlational analysis suggests many significant inter-relationships between attributions, emotions and interventions. Results of stepwise multiple regression analysis indicate that punishment interventions are predicted by feelings of anger and pity, accounting for 43 percent of the variance; and counselling/supportive interventions are predicted by feelings of pity and hopelessness, accounting for 28 percent ofthe variance. In addition, results suggest that overall, teachers do respond to natural attributions, but this does not seem to be the only influence on their choice of interventions. Implications for consultants and School Psychologists are discussed.
Conformal Floquet dynamics with a continuous drive protocol
Creators: name: Das, Diptarka
name: Ghosh, Roopayan
name: Sengupta, Krishnendu
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the properties {of a conformal field theory} (CFT) driven periodically with a continuous protocol characterized by a frequency $ω_D$. Such a drive, in contrast to its discrete counterparts (such as square pulses or periodic kicks), does not admit exact analytical solution for the evolution operator $U$. In this work, we develop a Floquet perturbation theory which provides an analytic, albeit perturbative, result for $U$ that matches exact numerics in the large drive amplitude limit. We find that the drive yields the well-known heating (hyperbolic) and non-heating (elliptic) phases separated by transition lines (parabolic phase boundary). Using this and starting from a primary state of the CFT, we compute the return probability ($P_n$), equal ($C_n$) and unequal ($G_n$) time two-point primary correlators, energy density($E_n$), and the $m^{\rm th}$ Renyi entropy ($S_n^m$) after $n$ drive cycles. Our results show that below a crossover stroboscopic time scale $n_c$, $P_n$, $E_n$ and $G_n$ exhibits universal power law behavior as the transition is approached either from the heating or the non-heating phase; this crossover scale diverges at the transition. We also study the emergent spatial structure of $C_n$, $G_n$ and $E_n$ for the continuous protocol and find emergence of spatial divergences of $C_n$ and $G_n$ in both the heating and non-heating phases. We express our results for $S_n^m$ and $C_n$ in terms of conformal blocks and provide analytic expressions for these quantities in several limiting cases. Finally we relate our results to those obtained from exact numerics of a driven lattice model.
description: 20 pages, many figures
Low temperature photoluminescence imaging and time-resolved spectroscopy of single CdS nanowires
Creators: name: Titova, L. V.
name: Hoang, Thang Ba
name: Jackson, H. E.
name: Smith, L. M.
name: Yarrison-Rice, J. M.
name: Lensch, J. L.
name: Lauhon, L. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Time-resolved photoluminescence (PL) and micro-PL imaging were used to study single CdS nanowires at 10 K. The low-temperature PL of all CdS nanowires exhibit spectral features near energies associated with free and bound exciton transitions, with the transition energies and emission intensities varying along the length of the nanowire. In addition, several nanowires show spatially localized PL at lower energies which are associated with morphological irregularities in the nanowires. Time-resolved PL measurements indicate that exciton recombination in all CdS nanowires is dominated by non-radiative recombination at the surface of the nanowires.
description: 9 pages, 3 figures, to be published in Applied Physics Letters
Coupling Methodology within the Software Platform Alliances
Creators: name: Montarnal, Philippe
name: Dimier, Alain
name: Deville, Estelle
name: Adam, Erwan
name: Gaombalet, Jérôme
name: Bengaouer, Alain
name: Loth, Laurent
name: Chavant, Clément
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Software (cs.MS)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences

description: CEA, ANDRA and EDF are jointly developing the software platform ALLIANCES which aim is to produce a tool for the simulation of nuclear waste storage and disposal repository. This type of simulations deals with highly coupled thermo-hydro-mechanical and chemical (T-H-M-C) processes. A key objective of Alliances is to give the capability for coupling algorithms development between existing codes. The aim of this paper is to present coupling methodology use in the context of this software platform.
description: 7 pages
Full Counting Statistics of Phonon Transport in Disordered Systems
Creators: name: Zhang, Chao
name: Xu, Fuming
name: Wang, Jian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The coherent potential approximation (CPA) within full counting statistics (FCS) formalism is shown to be a suitable method to investigate average electric conductance, shot noise as well as higher order cumulants in disordered systems. We develop a similar FCS-CPA formalism for phonon transport through disordered systems. As a byproduct, we derive relations among coefficients of different phonon current cumulants. We apply the FCS-CPA method to investigate phonon transport properties of graphene systems in the presence of disorders. For binary disorders as well as Anderson disorders, we calculate up to the $8$-th phonon transmission moments and demonstrate that the numerical results of the FCS-CPA method agree very well with that of the brute force method. The benchmark shows that the FCS-CPA method achieves $20$ times more speedup ratio. Collective features of phonon current cumulants are also revealed.
description: 11 pages, 8 figures
From Tinkering to Engineering: Measurements in Tensorflow Playground
Creators: name: Hoeiness, Henrik
name: Harstad, Axel
name: Friedland, Gerald
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: I.2
subject: 68T07

description: In this article, we present an extension of the Tensorflow Playground, called Tensorflow Meter (short TFMeter). TFMeter is an interactive neural network architecting tool that allows the visual creation of different architectures of neural networks. In addition to its ancestor, the playground, our tool shows information-theoretic measurements while constructing, training, and testing the network. As a result, each change results in a change in at least one of the measurements, providing for a better engineering intuition of what different architectures are able to learn. The measurements are derived from various places in the literature. In this demo, we describe our web application that is available online at http://tfmeter.icsi.berkeley.edu/ and argue that in the same way that the original Playground is meant to build an intuition about neural networks, our extension educates users on available measurements, which we hope will ultimately improve experimental design and reproducibility in the field.
description: 3 pages, 3 figures, ICPR 2020
[Data set for replication] Valenzuela, S., Piña, M., & Ramírez, J. (2017). Behavioral effects of framing on social media users: How conflict, economic, human interest, and morality frames drive news sharing. Journal of Communication, 67(5), 803-826.
Creators: name: Valenzuela, Sebastián
Publisher: name: OSF Registries
Year: 2023
Subjects: subject: Communication
subject: Social and Behavioral Sciences

description: CSV file contains the code for each news item along with its corresponding frames. Additionally, a folder (TXT; compressed) contains the full text for each article, where the file name corresponds to the news item code.
Informative Words and Discreteness
Creators: name: Gilman, Jane
Publisher: name: arXiv
Year: 2007
Subjects: subject: Geometric Topology (math.GT)
subject: Group Theory (math.GR)
subject: FOS: Mathematics

description: There are certain families of words and word sequences (words in the generators of a two-generator group) that arise frequently in the Teichm{ü}ller theory of hyperbolic three-manifolds and Kleinian and Fuchsian groups and in the discreteness problem for two generator matrix groups. We survey some of the families of such words and sequences: the semigroup of so called {\sl good} words of Gehring-Martin, the so called {\sl killer} words of Gabai-Meyerhoff-NThurston, the Farey words of Keen-Series and Minsky, the discreteness-algorithm Fibonacci sequences of Gilman-Jiang and {\sl parabolic dust} words. We survey connections between the families and establish a new connection between good words and Farey words.
description: one pdf file
Μια νέα φασματική μέθοδος για την αναταξινόμηση χρωμοσωμάτων
Creators: name: Χότζογλου, Ελισσάβετ Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Χρωμοσώματα
Αναταξινόμηση
Φασματική
Chromosomes
Post-classification
Spectral

description: Η ανάλυση των ανθρώπινων χρωμοσωμάτων είναι μία ιδιαίτερα ση- μαντική διεργασία στην κυτταρογενετική, ειδικά σε προγεννητικές ανα- λύσεις, στην διάγνωση διαφόρων συνδρόμων(Down, Ανευπλοειδία) και στην καρκινική έρευνα. Τις τελευταίες τέσσερις δεκαετίες έχουν γίνει σημαντικές προσπάθειες για την ανάπτυξη συστημάτων αυτόματης κα- τάταξης χρωμοσωμάτων. Ένα σύστημα κατηγοριοποίησης χρωμοσωμά- των χωρίς την παρέμβαση ειδικού θα πρέπει να περιλαμβάνει τα στάδια της ανάκτησης της εικόνας ενός κυττάρου από το μικροσκόπιο, του δια- χωρισμού των χρωμοσωμάτων, της εξαγωγής των χαρακτηριστικών των χρωμοσωμάτων και τέλος της ταξινόμησής τους βάσει αυτών των χαρα- κτηριστικών σε ζεύγη-κλάσεις. Σε αυτήν την εργασία μελετάται κυρίως το κομμάτι της ταξινόμησης των χρωμοσωμάτων και ειδικότερα της αναταξινόμησης. Τα χρωμοσώματα του συνόλου δεδομένων τα οποία επεξεργαζόμαστε έχουν ταξινομηθεί με τη βοήθεια των μηχανών διανυσμάτων υποστήριξης (SVM). Μετά όμως από την αρχική ταξινόμηση κάποια χρωμοσώματα έχουν ταξινομηθεί λάθος. Για τη διόρθωση αυτών των λαθών προτείνεται ένας αλγόριθμος ο οποίος επανακατανέμει τα λάθος χρωμοσώματα στις κλάσεις. Βασική ιδέα του αλγορίθμου είναι η κατασκευή του πίνακα γειτνίασης ενός γράφου, του οποίου ο κάθε κόμβος αντιστοιχεί σε μία πιθανή ανάθεση κλάσης σε ένα ζεύγος χρωμοσωμάτων και οι ακμές του περιγράφουν το πόσο ‘σύμφωνες’ είναι αυτές οι αναθέσεις μεταξύ τους.
description: The analysis of human chromosomes is a highly important process in Cytogenetics, specially in prenatal analysis, several syndromes diagnosis (Down syndrome, Aneuploidy) and cancer research. During the last four decades, there have been significant attempts to develop automated chromosome classification systems. A chromosome classification system without specialist’s intervention, consists of cell image retrieval from a microscope, chromosome segmentation, feature extraction out of the chromosomes and eventually classification, based on these features, in pairs-classes. In this thesis, the chromosome classification part is mainly studied focusing specially on the process of post-classification. The dataset of chromosomes we process, have been classified using Support Vector Machines. However, after initial classification, some chromosomes will have been classified incorrectly. Aiming to correct these errors, an algorithm that reallocates the misclassified chromosomes to classes, is proposed. The basic concept of the algorithm is the construction of the adjacency matrix of a graph whose each node corresponds to a possible class assignment to a pair of chromosomes and the edges describe how much these assignments ‘agree’ between them.
description: Σε συνεργασία με το τμήμα Λογιστικής και Χρηματοοικονομικής (Πανεπιστήμιο Μακεδονίας)
Revealing Lung Affections from CTs. A Comparative Analysis of Various Deep Learning Approaches for Dealing with Volumetric Data
Creators: name: Miron, Radu
name: Moisii, Cosmin
name: Breaban, Mihaela
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: I.2.6

description: The paper presents and comparatively analyses several deep learning approaches to automatically detect tuberculosis related lesions in lung CTs, in the context of the ImageClef 2020 Tuberculosis task. Three classes of methods, different with respect to the way the volumetric data is given as input to neural network-based classifiers are discussed and evaluated. All these come with a rich experimental analysis comprising a variety of neural network architectures, various segmentation algorithms and data augmentation schemes. The reported work belongs to the SenticLab.UAIC team, which obtained the best results in the competition.
description: ImageClef2020 Tuberculosis task
Φορολογία στην κατοχή ακίνητης περιουσίας:
Creators: name: Τενεκετζή, Αικατερίνη Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: φορολογία
ακίνητα
κατοχή
taxation
real estate
ownership

description: Αντικείμενο της εργασίας είναι η παρουσίαση και κριτική προσέγγιση των ρυθμίσεων των φόρων που επιβάλλονται στην κατοχή της ακίνητης περιουσίας στην Ελλάδα. Μέσω της ιστορικής εξέλιξης των βασικών ρυθμίσεων και των κρίσιμων ζητημάτων που σχετίζονται με τους φόρους στην κατοχή ακίνητης περιουσίας, επιχειρήθηκε η πληρέστερη κατανόηση των ρυθμίσεων που ισχύουν σήμερα και η κριτική προσέγγιση της επιβολής των φόρων στην κατοχή ακινήτων. Έτσι, στο πρώτο μέρος της εργασίας, αναλύεται η νομική φύση των φόρων αυτών, γίνεται μια σύντομη αναδρομή στην επιβολή φόρων κατοχής και διευκρινίζονται βασικές συνταγματικές αρχές που σχετίζονται με αυτούς. Παράλληλα, γίνεται αναφορά στο δικαιολογητικό λόγο της επιβολής των φόρων για την κατοχή ακινήτων και τίθενται κρίσιμα ζητήματα που σχετίζονται με αυτούς. Το δεύτερο μέρος της εργασίας αναφέρεται στο ισχύον δίκαιο. Παρουσιάζονται οι βασικές ρυθμίσεις και τίθενται οι κύριοι προβληματισμοί σχετικά με την νομιμότητα της επιβολής των φόρων στην κατοχή ακινήτων. Το ερώτημα που ανακύπτει εν προκειμένω συνίσταται στο κατά πόσο η σωρευτική επιβολή φόρων στην ακίνητη περιουσία, προσλαμβάνει επαχθείς διαστάσεις. Τέλος, τίθενται οι συμπερασματικές παρατηρήσεις και προτάσεις που σχετίζονται με την επιβολή φόρων στην κατοχή της ακίνητης περιουσίας.
description: The purpose of this thesis is the presentation and the critical approach of tax regulations concerning real estate ownership in Greece. Through the historical development of principal settings and critical issues related to real estate taxes, an attempt was made to illustrate the present legal status and a critical approach to the imposition of real estate taxes. Though, the first part of the thesis analyzes the legal nature of these taxes and continues with a short overview of taxes concerning ownership and ends by clarifying the basic constitutional principles related to these taxes. Furthermore, the paper analyzes the reasoning behind the imposition of taxes on land property and sets the critical issues related to them. The second part refers to the present law. It presents the basic settings and sets the main concerns concerning the legality of land property taxes. The question that arises here is, whether the cumulative imposition of taxes on real estate, equals to burdensome proportions. Finally, the paper concludes with remarks and proposals related to taxation of land property.
Biocausality, the Cell and the Schrödinger Machine Concept
Creators: name: Powell, Alexander
Publisher: name: Zenodo
Year: 2019
Subjects: life
thermodynamics
metabolism
ATP
bioenergetics
molecular dynamics
causality
Schrödinger Machine
systems biology
cell physiology
thermal energy

description: Slides from 2015 setting out the significance of thermal energy-driven molecular dynamics as a central causal player in living systems, along with ATP as a metabolic driver. Subsequent related preprint available at https://osf.io/8ms6u/.
The Hidden Scalar Lagrangians within Horndeski Theory
Creators: name: Horndeski, Gregory W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this essay I show that there exists a new way to obtain scalar-tensor field theories by combining a special scalar field on the tangent bundle of a four-dimensional manifold with a scalar field on that manifold. These two scalar fields act as a generating function for the metric tensor. When using these two scalar fields in the Horndeski Lagrangians, we discover, while seeking Friedmann-Lemaitre-Robertson-Walker type cosmological solutions, that hidden in the Horndeski Lagrangians are non-degenerate second-order scalar Lagrangians. In accordance with Ostrogradsky's work, these hidden scalar Lagrangians lead to multiple vacuum solutions, and thereby predict the existence of a multiverse. The multiverse is comprised of numerous different types of individual universes. E.g., some begin explosively, and then coast along exponentially forever at an accelerated rate, while some begin in that manner, and then stop expanding and contract to their original initial stage.
description: 9 pages. This essay won an honorable mention in the Gravitational Research Foundation's 2020 competition for essays on gravitation
Ο πλατωνικός Θεαίτητος υπό το πρίσμα της Ρητορικής του Αριστοτέλη:
Creators: name: Ραμαντάνης, Νίκος Σπύρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Θεαίτητος
Ρητορική
Γνώση
Theaetetus
Rhetoric
Knowledge

description: Σκοπός της εργασίας είναι η κατανόηση του πλατωνικού διαλόγου Θεαίτητος υπό το πρίσμα της Ρητορικής του Αριστοτέλη. Η αναγκαιότητα εξοικείωσης του αναγνώστη με την Ρητορική είναι η κατανόηση της σοβαρής δυσκολίας διαχωρισμού της Ρητορικής από την διαλεκτική μεθόδευση της γνώμης. Γι αυτό τον λόγο δίνεται μια εκτεταμένη περιγραφή της Ρητορικής. Εν συνεχεία πραγματοποιείται μια μετάβαση στο πλατωνικό διάλογο Θεαίτητος για να επαναδιατυπωθεί το βασικό ερώτημα του διαλόγου ‘τι είναι γνώση’. Συνέπεια της επαναδιατύπωσης είναι το συμπέρασμα ότι οι τρείς ορισμοί της γνώσης που δίνονται στον διάλογο αποτελούν ατελείς μορφές της γνώσης δηλαδή γνώμες. Καλούμαστε λοιπόν, στην συγκεκριμένη εργασία, να κατανοήσουμε την διαλεκτική συγκρότηση των γνωμών με την συνεισφορά της Ρητορικής του Αριστοτέλη.
description: The main idea of this dissertation is to help the reader understand one of Plato’s dialogue Theaetetus under the prism of Aristotle’ Rhetoric. The reader should be familiar with the Rhetoric in order to be able to understand the differences between Rhetoric and the method of dialectic manipulation of one’s opinion. In order to achieve this goal, the dissertation includes an extensive description of Aristotle’ Rhetoric. Furthermore, there is an analysis of the platonic dialogue Theaetetus in order to reconsider the fundamental question of the dialogue that is ‘how can we define knowledge’. As a result, one can come to the conclusion that the three definitions of knowledge given in this dialogue are simply incomplete forms of knowledge, just opinions. Thus, in this dissertation, these three opinions are going to be examined about the way that they have been formed through dialogue by using Aristotle’ Rhetoric.
Fast and Accurate Pseudoinverse with Sparse Matrix Reordering and Incremental Approach
Creators: name: Jung, Jinhong
name: Sael, Lee
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: How can we compute the pseudoinverse of a sparse feature matrix efficiently and accurately for solving optimization problems? A pseudoinverse is a generalization of a matrix inverse, which has been extensively utilized as a fundamental building block for solving linear systems in machine learning. However, an approximate computation, let alone an exact computation, of pseudoinverse is very time-consuming due to its demanding time complexity, which limits it from being applied to large data. In this paper, we propose FastPI (Fast PseudoInverse), a novel incremental singular value decomposition (SVD) based pseudoinverse method for sparse matrices. Based on the observation that many real-world feature matrices are sparse and highly skewed, FastPI reorders and divides the feature matrix and incrementally computes low-rank SVD from the divided components. To show the efficacy of proposed FastPI, we apply them in real-world multi-label linear regression problems. Through extensive experiments, we demonstrate that FastPI computes the pseudoinverse faster than other approximate methods without loss of accuracy. %and uses much less memory compared to full-rank SVD based approach. Results imply that our method efficiently computes the low-rank pseudoinverse of a large and sparse matrix that other existing methods cannot handle with limited time and space.
Internal shocks in relativistic outflows: collisions of magnetized shells
Creators: name: Mimica, Petar
name: Aloy, Miguel-Angel
name: Mueller, Ewald
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: (Abridged): We study the collision of magnetized irregularities (shells) in relativistic outflows in order to explain the origin of the generic phenomenology observed in the non-thermal emission of both blazars and gamma-ray bursts. We focus on the influence of the magnetic field on the collision dynamics, and we further investigate how the properties of the observed radiation depend on the strength of the initial magnetic field and on the initial internal energy density of the flow. The collisions of magnetized shells and the radiation resulting from these collisions are calculated using the 1D relativistic magnetohydrodynamics code MRGENESIS. The interaction of the shells with the external medium prior to their collision is also determined using an exact solver for the corresponding 1D relativistic magnetohydrodynamic Riemann problem. Our simulations show that two magnetization parameters - the ratio of magnetic energy density and thermal energy density, α_B, and the ratio of magnetic energy density and mass-energy density, σ- play an important role in the pre-collision phase, while the dynamics of the collision and the properties of the light curves depend mostly on the magnetization parameter σ. The interaction of the shells with the external medium changes the flow properties at their edges prior to the collision. For sufficiently dense shells moving at large Lorentz factors (\simgt 25) these properties depend only on the magnetization parameter σ. Internal shocks in GRBs may reach maximum efficiencies of conversion of kinetic into thermal energy between 6% and 10%, while in case of blazars, the maximum efficiencies are \sim 2%.
description: 17 pages, 18 figures. 2 new references have been added. Accepted for publication in Astronomy and Astrophysics
Phase-Amplitude Coupling in Neuronal Oscillator Networks
Creators: name: Qin, Yuzhen
name: Menara, Tommaso
name: Bassett, Danielle S.
name: Pasqualetti, Fabio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Dynamical Systems (math.DS)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Biological sciences
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Phase-amplitude coupling (PAC) describes the phenomenon where the power of a high-frequency oscillation evolves with the phase of a low-frequency one. We propose a model that explains the emergence of PAC in two commonly-accepted architectures in the brain, namely, a high-frequency neural oscillation driven by an external low-frequency input and two interacting local oscillations with distinct, locally-generated frequencies. We further propose an interconnection structure for brain regions and demonstrate that low-frequency phase synchrony can integrate high-frequency activities regulated by local PAC and control the direction of information flow across distant regions.
description: 6 pages, 5 figures