cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Οι αυτοτελείς ισχυρισμοί στην ποινική δίκη του Νόμου 4139/2013 Περί Ναρκωτικών
Creators: name: Κασάπη, Βασιλική Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Ναρκωτικά
Αυτοτελείς ισχυρισμοί
Ποινική δίκη
Drugs
Independent fleas
criminal procedure

description: Η παρούσα εργασία πραγματεύεται το ζήτημα της πρότασης, ανάπτυξης, αξιολόγησης και αιτιολογίας των αυτοτελών ισχυρισμών καθώς και την αιτιολογία των αποφάσεων του δικαστηρίου της ουσίας επί των προταθέντων ενώπιον του, αυτοτελών ισχυρισμών. Παρουσιάζει την επικρατούσα άποψη της νομολογίας και προσπαθεί να την αναλύσει βάσει του Συντάγματος, της Ποινικής Δικονομίας και ασφαλώς του Ν. 4139/2013 και της νομολογίας των ελληνικών δικαστηρίων επί των αδικημάτων που προβλέπονται στις διατάξεις του νόμου αυτού
description: Τhis dissertation deals with the issue of entering, submitting, assessing and reasoning/justification of independent pleas in law as well as the justification/reasoning of judicial decisions as far as the independent pleas in law that were submitted before the court of law, are concerned. It presents the prevailing view of jurisprudence and tries to examine it thoroughly, on the basis of the Greek Constitution, the Greek Code of Criminal Procedure and of course the Law 4139/2013 and the jurisprudence of the Greek courts on offences referred to in this law
description: Σε συνεργασία με τη Νομική Σχολή Πανεπιστημίου Λευκωσίας (Κύπρος)
The Rotor Model with spectral parameters and enumerations of Alternating Sign Matrices
Creators: name: Cantini, Luigi
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: Combinatorics (math.CO)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In this paper we study the Rotor Model of Martins and Nienhuis. After introducing spectral parameters, a combined use of integrability, polynomiality of the ground state wave function and a mapping into the fully-packed O(1)-model allows us to determine the sum rule and a family of maximally nested components for different boundary conditions. We see in this way the appearance of 3-enumerations of Alternating Sign Matrices.
description: 25 pages
A generalized mechanical model using stress-strain duality at large strain for amorphous polymers
Creators: name: Bernard, Ca
name: George, D
name: Ahzi, S
name: Rémond, Y
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Numerous models have been developed in the literature to simulate the thermomechanical behavior of amorphous polymer at large strain. These models generally show a good agreement with experimental results when the material is submitted to uniaxial loadings (tension or compression) or in case of shear loadings. However, this agreement is highly degraded when they are used in the case of combined load cases. A generalization of these models to more complex loads is scarce. In particular, models that are identified in tension or compression often overestimate the response in shear. One difficulty lies in the fact that 3D models must aggregate different physical modeling, described with different kinematics. This requires the use of transport operators complex to manipulate. In this paper, we propose a mechanical model for large strains, generalized in 3D, and precisely introducing the adequate transport operators in order to obtain an exact kinematic. The stress strain duality is validated in the writing of the power of internal forces. This generalized model is applied in the case of a polycarbonate amorphous polymers. The simulation results in tension/compression and shear are compared with the classical modeling and experimental results from the literature. The results highly improve the numerical predictions of the mechanical response of amorphous polymers submitted to any load case.
NAVIGATING THE TURBULENCE OF THE TOURISM INDUSTRY: FINDING THE BALANCE OF EXPLOITATION AND EXPLORATION THROUGH ORGANISATIONAL AMBIDEXTERITY
Creators: name: HERMINAWATY ABUBAKAR
name: ANTONG
name: SUKMAWATI
name: NURHIDAYANTI
name: ALLAN DIKA
Publisher: name: Zenodo
Year: 2024
Subjects: Organisational Ambidexterity; Tourism Industry; Turbulence; Exploration Exploitation; Adaptability.

description: Abstract

The COVID-19 epidemic is causing considerable disruptions to the global tourism industry. The city of Makassar in Indonesia is not exempt from this predicament. The purpose of this paper is to examine how organizational ambidexterity might help tourism businesses navigate change and gain a competitive edge over time. In addition to explaining organizational ambidexterity and its advantages for the tourism sector, this essay outlines opportunities and problems in the age of disruption and examines tactics for striking a balance between exploitation and exploration. The ability of the tourist sector to capitalize on innovative opportunities and maintain efficient operations while adapting to changes in the business environment is the key focus of the balance strategy. Quantitative approaches along with survey methodologies are used in this study. Information was gathered from 227 Makassar tourism-related industries. With the aid of SPSS (Statistical Product and Service Solution), data were analyzed using multiple linear regression statistical analysis and moderated regression analysis (MRA). The findings highlight how crucial it is for the tourism sector to strike a balance between exploration (innovation) and exploitation (efficiency). Achieving organizational success requires striking a compromise between adaptability-moderated business turbulence management and exploitation-exploration (also known as organizational ambidexterity). To achieve sustainable excellence and navigate through turbulent times, the tourism industry can benefit greatly from organizational ambidexterity.
Amphipoda Latreille 1916
Creators: name: Alves, Jessika
name: Neves, Elizabeth
name: Johnsson, Rodrigo
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda

description: Amphipoda Latreille, 1916  Senticaudata Lowry & Myers, 2013
description: Published as part of Alves, Jessika, Neves, Elizabeth & Johnsson, Rodrigo, 2018, A review of Quadrimaera Krapp-Schickel & Ruffo, 2000 (Amphipoda: Senticaudata) from Brazil, pp. 567-593 in Zootaxa 4532 (4) on page 569, DOI: 10.11646/zootaxa.4532.4.8, http://zenodo.org/record/2615683
The Connection between Gamma-Ray Bursts and Extremely Metal-Poor Stars as Nucleosynthetic Probes of the Early Universe
Creators: name: Nomoto, K.
name: Tominaga, N.
name: Tanaka, M.
name: Maeda, K.
name: Umeda, H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The connection between the long GRBs and Type Ic Supernovae (SNe) has revealed the interesting diversity: (i) GRB-SNe, (ii) Non-GRB Hypernovae (HNe), (iii) X-Ray Flash (XRF)-SNe, and (iv) Non-SN GRBs (or dark HNe). We show that nucleosynthetic properties found in the above diversity are connected to the variation of the abundance patterns of extremely-metal-poor (EMP) stars, such as the excess of C, Co, Zn relative to Fe. We explain such a connection in a unified manner as nucleosynthesis of hyper-aspherical (jet-induced) explosions Pop III core-collapse SNe. We show that (1) the explosions with large energy deposition rate, $\dot{E}_{\rm dep}$, are observed as GRB-HNe and their yields can explain the abundances of normal EMP stars, and (2) the explosions with small $\dot{E}_{\rm dep}$ are observed as GRBs without bright SNe and can be responsible for the formation of the C-rich EMP (CEMP) and the hyper metal-poor (HMP) stars. We thus propose that GRB-HNe and the Non-SN GRBs (dark HNe) belong to a continuous series of BH-forming stellar deaths with the relativistic jets of different $\dot{E}_{\rm dep}$.
description: 8 pages, 6 figures. To appear in "Massive Stars as Cosmic Engines", Proceedings of IAU Symposium 250 (December 2007, Kauai), eds. F. Bresolin, P.A. Crowther, & J. Puls (Cambridge Univ. Press)
Freezing of a disorder induced quantum spin liquid
Creators: name: Hu, Xiao
name: Pajerowski, Daniel M.
name: Zhang, Depei
name: Podlesnyak, Andrey A.
name: Qiu, Yiming
name: Huang, Qing
name: Zhou, Haidong
name: Klich, Israel
name: Kolesnikov, Alexander I.
name: Stone, Matthew B.
name: Lee, Seung-Hun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: $\rm{Sr_2CuTe_{0.5}W_{0.5}O_6}$ is a square-lattice magnet with super-exchange between S=1/2 $\rm{Cu^{2+}}$ spins mediated by randomly distributed Te and W ions. Here, using sub-K temperature and 20 $\rmμ$eV energy resolution neutron scattering experiments we show that this system transits from a gapless disorder-induced quantum spin liquid to a new quantum state below $\rm{T_f}$ = 1.7(1) K, exhibiting a weak frozen moment of /S ~ 0.1 and low energy dynamic susceptibility,$χ''({\hbarω})$ linear in energy which is surprising for such a weak freezing in this highly fluctuating quantum regime.
Μελέτη της συμπεριφοράς των Τελικών Χρηστών κατά τη διαδικασία ανάπτυξης ιστοσελίδων, σε πραγματικό χρόνο, με την χρήση Mousetracking
Creators: name: Καλλίτση, Αικατερίνη Πέτρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Περιβάλλον τελικών χρηστών
Μοντέλα συμπεριφοράς τελικών χρηστών
End user development
Mousetracking
Behevioral user modeling

description: Στην παρούσα εργασία αναπτύξαμε ένα εργαλείο mousetracking και μελετήσαμε την συμπεριφορά των τελικών χρηστών κατά την αλληλεπίδρασή τους με το εργαλείο ανάπτυξης ιστοσελίδων Wix το οποίο ανήκει στην κατηγορία των EUD συστημάτων. Αρχικά μελετήσαμε τα παρακάτω μοτίβα συμπεριφοράς 'μοτίβο σε ευθεία', 'μοτίβο δισταγμού', 'τυχαίο μοτίβο', 'σταθερό μοτίβο', 'μοτίβο καθοδήγησης' και καθορίσαμε τα βασικά χαρακτηριστικά και τις μετρικές του κάθε μοτίβου. Στην συνέχεια αναπτύξαμε ένα εργαλείο mouse tracking για την καταγραφή και ανάλυση των κινήσεων του ποντικιού σε πραγματικό χρόνο. Έγινε πειραματική χρήση σε ένα μικρό δείγμα τελικών χρηστών όπου ο σκοπός ήταν να εξετάσουμε εάν υπάρχει συσχέτιση μεταξύ κάποιων συμπεριφοριστικών γνωρισμάτων με τα μοτίβα που αναγνωρίζει το εργαλείο. Παρατηρήσαμε κάποια συσχέτιση μεταξύ του μοτίβου σε ευθεία και της μεταβλητής που αφορά την ευκολία στην χρήση καθώς επίσης και του τυχαίου μοτίβου και του μοτίβου δισταγμού με τη μεταβλητή που αφορά την αντίληψη κινδύνου
description: In this paper we developed a mouse tracking plugin and analyze the behavior of end-users during their interaction with the Wix platform, which is a web-based tool for creating websites and belongs to the EUD systems category. We studied the basic behavior patterns 'straight pattern', 'hesitation pattern', 'random pattern', 'fixed pattern', 'guided pattern' and defined the basic characteristics and metrics for each one. We also developed a mouse tracking tool in order to record and analyze the mouse movements and clicks, in real time. The tool was tested by a small sample of end users in order to study if there is any correlation between behavior factors and patterns recognized by the tool. The results showed us that there is correlation between the straight pattern and the 'easy of use' factor and between random and hesitation pattern and the 'risk perception' factor
description: Σε συνεργασία με: Λογιστικής και Χρηματοοικονομικής (Πανεπιστήμιο Μακεδονίας)
A gravitational explanation for quantum theory - non-time-orientable manifolds
Creators: name: Hadley, Mark J
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Spacetime manifolds that are not time orientable play a key role in a gravitational explanation of quantum theory. Such manifolds allow topology change, but also have fascinating additional properties such as net charge from source-free equations and spin half transformation properties. It is shown how the logical structure of propositions and the probabilities of quantum theory arise from such acausal space times
description: 7 pages Talk given at FFP8 in Madrid 2006
NAVIGATING THE TURBULENCE OF THE TOURISM INDUSTRY: FINDING THE BALANCE OF EXPLOITATION AND EXPLORATION THROUGH ORGANISATIONAL AMBIDEXTERITY
Creators: name: HERMINAWATY ABUBAKAR
name: ANTONG
name: SUKMAWATI
name: NURHIDAYANTI
name: ELFRINA
Publisher: name: Zenodo
Year: 2024
Subjects: Organisational Ambidexterity; Tourism Industry; Turbulence; Exploration Exploitation; Adaptability.

description: Abstract

The COVID-19 epidemic is causing considerable disruptions to the global tourism industry. The city of Makassar in Indonesia is not exempt from this predicament. The purpose of this paper is to examine how organizational ambidexterity might help tourism businesses navigate change and gain a competitive edge over time. In addition to explaining organizational ambidexterity and its advantages for the tourism sector, this essay outlines opportunities and problems in the age of disruption and examines tactics for striking a balance between exploitation and exploration. The ability of the tourist sector to capitalize on innovative opportunities and maintain efficient operations while adapting to changes in the business environment is the key focus of the balance strategy. Quantitative approaches along with survey methodologies are used in this study. Information was gathered from 227 Makassar tourism-related industries. With the aid of SPSS (Statistical Product and Service Solution), data were analyzed using multiple linear regression statistical analysis and moderated regression analysis (MRA). The findings highlight how crucial it is for the tourism sector to strike a balance between exploration (innovation) and exploitation (efficiency). Achieving organizational success requires striking a compromise between adaptability-moderated business turbulence management and exploitation-exploration (also known as organizational ambidexterity). To achieve sustainable excellence and navigate through turbulent times, the tourism industry can benefit greatly from organizational ambidexterity.
title: Larcher, Pierre (2012). Le système verbal de l’arabe classique. 2e édition revue etaugmentée. Aix-en-Provence: Presses Universitaires de Provence, pp. 188
Creators: name: Diez, Martino
Publisher: name: Edizioni Ca' Foscari - Digital Publishing
Year: 2015

description: Annali di Ca’ Foscari. Serie orientale, 51 | 2015
Privacy-preserving Identity Broadcast for Contact Tracing Applications
Creators: name: Dyo, Vladimir
name: Ali, Jahangir
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Wireless Contact tracing has emerged as an important tool for managing the COVID19 pandemic and relies on continuous broadcasting of a person's presence using Bluetooth Low Energy beacons. The limitation of current contact tracing systems in that a reception of a single beacon is sufficient to reveal the user identity, potentially exposing users to malicious trackers installed along the roads, passageways, and other infrastructure. In this paper, we propose a method based on Shamir secret sharing algorithm, which lets mobile nodes reveal their identity only after a certain predefined contact duration, remaining invisible to trackers with short or fleeting encounters. Through data-driven evaluation, using a dataset containing 18 million BLE sightings, we show that the method drastically reduces the privacy exposure of users. Finally, we implemented the approach on Android phones to demonstrate its feasibility and measure performance for various network densities.
description: Paper presented at 2021 IEEE Wireless Days Conference (30 June - 2 July 2021)
Anomalous diffusion in silo drainage
Creators: name: Arevalo, R.
name: Garcimartin, A.
name: Maza, D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The silo discharge process is studied by molecular dynamics simulations. The development of the velocity profile and the probability density function for the displacements in the horizontal and vertical axis are obtained. The PDFs obtained at the beginning of the discharge reveal non-Gaussian statistics and superdiffusive behaviors. When the stationary flow is developed, the PDFs at shorter temporal scales are non-Gaussian too. For big orifices a well defined transition between ballistic and diffusive regime is observed. In the case of a small outlet orifice, no well defined transition is observed. We use a nonlinear diffusion equation introduced in the framework of non-extensive thermodynamics in order to describe the movements of the grains. The solution of this equation gives a well defined relationship ($γ= 2/(3-q)$) between the anomalous diffusion exponent $γ$ and the entropic parameter $q$ introduced by the non-extensive formalism to fit the PDF of the fluctuations.
description: 18 pages, 6 figures. Substantially enlarged with new results. Accepted for EPJ-E
Johnson, Timothy A. (2011). John Adams’s «Nixon in China»: Musical Analysis, Historical and Political Perspectives. Farnham; Burlington: Ashgate, pp. 294 (printed ed.); 5737 positions (dig. ed. Kindle)
Creators: name: Greselin, Federico
Publisher: name: Università Ca’ Foscari Venezia, Italia
Year: 2015

description:

description: Annali di Ca’ Foscari. Serie orientale
Interference of Fock states in a single measurement
Creators: name: Dragan, Andrzej
name: Zin, Pawel
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study analytically the structure of an arbitrary order correlation function for a pair of Fock states and prove without any approximations that in a single measurement of particle positions interference effects must occur as experimentally observed with Bose-Einstein condensates. We also show that the noise level present in the statistics is slightly lower than for a respective measurement of phase states.
description: 4 pages
Η διαγλώσσα ρουμανόφωνων σπουδαστών της ελληνικής ως δεύτερης/ξένης γλώσσας: δεδομένα από το ΕΣΚΕΙΜΑΘ
Creators: name: Σκορδή, Βασιλική-Σόνια Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Γ1 ρουμανική – κατάκτηση ελληνικής ως Γ2
ανάλυση λαθών
διαγλώσσα
Ελληνικό Σώμα κειμένων μαθητών
romanian L1-greek L2 acquisition
error analysis
interlanguage

description: The present study aims at investigating and analyzing the interlanguage of Romanian learners of Greek as L2. Written productions have selected from the Greek Learner Corpus (GLC) and they were digitally annotated in order to analyze the error frequencies. The sample consists of 47 written production of 29 Romanian students from the initial state of learning till the proficiency level B2. The data from the error annotation have shown that the most frequent error categories are detected in the domains of spelling and the use of accent. The categories of nominal and verbal systems that have examined seem to be acquirable, although the verbal aspect and the agreement in clitics remain problematic
description: Η παρούσα έρευνα επιχειρεί την ανάλυση και μελέτη της διαγλώσσας ρουμανόφωνων μαθητών της ελληνικής ως δεύτερης/ξένης γλώσσας. Οι γραπτές παραγωγές συλλέχτηκαν στο πλαίσιο της δημιουργίας του ΕΣΚΕΙΜΑΘ και επισημειώθηκαν με σκοπό την ανάλυση των λαθών. Το δείγμα αποτελείται από 47 γραπτές παραγωγές 29 ρουμανόφωνων μαθητών από το αρχικό στάδιο κατάκτησης έως το επίπεδο Β2. Τα δεδομένα από την επισημείωση έδειξαν ότι οι συχνότερες κατηγορίες λαθών εντοπίζονται στους τομείς της ορθογραφίας και της χρήσης του τονισμού. Οι κατηγορίες του ονοματικού και του ρηματικού συστήματος που μελετήθηκαν παρουσιάζονται κατακτημένες, ωστόσο, τα λάθη στη ρηματική όψη και τη συμφωνία των κλιτικών εμφανίζονται ως οι πιο προβληματικές
Cometary Activity Begins at Kuiper Belt Distances: Evidence from C/2017 K2
Creators: name: Jewitt, David
name: Kim, Yoonyoung
name: Mutchler, Max
name: Agarwal, Jessica
name: Li, Jing
name: Weaver, Harold
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We study the development of activity in the incoming long-period comet C/2017 K2 over the heliocentric distance range 9 < r_H < 16 AU. The comet continues to be characterized by a coma of sub-millimeter and larger particles ejected at low velocity. In a fixed co-moving volume around the nucleus we find that the scattering cross-section of the coma is related to the heliocentric distance by a power law with heliocentric index $s = 1.14\pm0.05$. This dependence is significantly weaker than the inverse square variation of the insolation as a result of two effects. These are, first, the heliocentric dependence of the dust velocity and, second, a lag effect due to very slow-moving particles ejected long before the observations were taken. A Monte Carlo model of the photometry shows that dust production beginning at r_H ~ 35 AU is needed to match the measured heliocentric index, with only a slight dependence on the particle size distribution. Mass loss rates in dust at 10 AU are of order 1000 kg/s, while loss rates in gas may be much smaller, depending on the unknown dust to gas ratio. Consequently, the ratio of the non-gravitational acceleration to the local solar gravity may, depending on the nucleus size, attain values comparable to values found in short-period comets at much smaller distances. Non-gravitational acceleration in C/2017 K2 and similarly distant comets, while presently unmeasured, may limit the accuracy with which we can infer the properties of the Oort cloud from the orbits of long-period comets.
description: 40 pages, 9 figures
Errors in trapped-ion quantum gates due to spontaneous photon scattering
Creators: name: Ozeri, R.
name: Itano, W. M.
name: Blakestad, R. B.
name: Britton, J.
name: Chiaverini, J.
name: Jost, J. D.
name: Langer, C.
name: Leibfried, D.
name: Reichle, R.
name: Seidelin, S.
name: Wesenberg, J. H.
name: Wineland, D. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We analyze the error in trapped-ion, hyperfine qubit, quantum gates due to spontaneous scattering of photons from the gate laser beams. We investigate single-qubit rotations that are based on stimulated Raman transitions and two-qubit entangling phase-gates that are based on spin-dependent optical dipole forces. This error is compared between different ion species currently being investigated as possible quantum information carriers. For both gate types we show that with realistic laser powers the scattering error can be reduced to below current estimates of the fault-tolerance error threshold.
description: 15 pages and 6 figures, updated, fixed typos
Μελέτη της οριζόντιας ορατότητας στο αεροδρόμιο Θεσσαλονίκης ̈Μακεδονία ̈ σε συσχέτιση με διάφορες ατμοσφαιρικές παραμέτρους
Creators: name: Μιχαλόπουλος, Στυλιανός Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Ορατότητα-Θεσσαλονίκη
Συσχέτιση με διάφορες ατμοσφαιρικές παραμέτρους
Visibility -Thessaloniki
in conjunction with various atmospheric parameters

description: Σκοπός της παρούσας Διπλωματικής εργασίας είναι να παρατηρήσουμε πως συμπεριφέρεται η ορατότητα στο αεροδρόμιο Θεσσαλονίκης ¨Μακεδονία¨ σε συσχέτιση με το οπτικό βάθος των aerosol στην ατμόσφαιρα, της ευρύτερης περιοχής ενδιαφέροντος καθώς και η συσχέτιση με την σχετική υγρασία τις επίμαχες ημέρες και ώρες που παρατηρήθηκαν και καταγράφηκαν αυτά τα επεισόδια
description: The purpose of this analysis is to observe how the visibility at Thessaloniki 'Macedonia' airport behaves in relation to the aerosol optical depth of the atmosphere, for the area of interest as well as the relation to the relative humidity these episodes were recorded
An investigation of open cluster Melotte 72 using Gaia DR2
Creators: name: Hendy, Yasser
name: Tadross, Ashraf
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The estimation of the main parameters of star clusters is significant in astrophysical studies. The most important aspect of using the Gaia DR2 survey lies in the positions, parallax, and proper motions of cluster stars with homogeneous photometry that make the membership probability determine with high accuracy. In this respect, depending on Gaia DR2 database, an analysis of the open star cluster Melotte 72 is taking place here. It is located at a distance of 2345+/-108 pc with an age of 1.0+/-0.5 Gyr. In studying the radial density profile, the radius is found to be 5.0+/-0.15 arcmin. The reddening, the luminosity and mass functions, the total mass of the cluster, and the galactic geometrical distances (X_Sun, Y_Sun, Z_Sun), and the distance from the galactic center (R_g ) have been estimated as well. Our study has shown a dynamical relaxation behavior of Melotte 72.
description: 10 pages, 11 figures, 2 tables, accepted for publication in Astronomische Nachrichten
Oscillations of the purity in the repeated-measurement-based generation of quantum states
Creators: name: Militello, B.
name: Yuasa, K.
name: Nakazato, H.
name: Messina, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Repeated observations of a quantum system interacting with another one can drive the latter toward a particular quantum state, irrespectively of its initial condition, because of an {\em effective non-unitary evolution}. If the target state is a pure one, the degree of purity of the system approaches unity, even when the initial condition of the system is a mixed state. In this paper we study the behavior of the purity from the initial value to the final one, that is unity. Depending on the parameters, after a finite number of measurements, the purity exhibits oscillations, that brings about a lower purity than that of the initial state, which is a point to be taken care of in concrete applications.
description: 5 pages, 3 figures
Structure of the Queen Charlotte Basin and underlying crust from modelling and inversion of three-dimensional seismic refraction data
Creators: name: Hole, John A.
Publisher: name: University of British Columbia
Year: 2008

description: A combined seismic reflection and refraction survey was carried out in 1988 to investigate the structure and tectonic evolution of the Queen Charlotte (QC) Basin and underlying crust off the northern coast of British Columbia. While the marine multichannel reflection data were being collected, refracted and wide-angle reflected energy from the large airgun array were recorded at surrounding land sites in both inline (2d) and broadside (3d) geometries. The broadside refraction data recorded on the QC Islands provide good 3d coverage beneath western Hecate Strait. In this study, these data are interpreted to determine the 3d structure of the basin and underlying crust. Modelling procedures are developed to interpret densely sampled 3d seismic travel time data. An inversion algorithm to determine the depth of a refracting interface and atomographic inversion algorithm to determine velocity structure are described. Travel times for 3d models are computed using a rapid finite difference algorithm that is extended to allow large velocity contrasts, the determination of rays, variable sampling of the model, and the computation of reflection times. The inversion in both algorithms is parameterized in a simple manner that eliminates the need to store or solve large systems of linear equations. Iterative nonlinear procedures allow arbitrarily large 3d anomalous velocities and interface structures to be determined. The advantages in computational speed of the procedures allow dense spatial sampling of the models, providing spatially well-resolved 3d images. Variations of the first arrival travel times from the broadside refraction data are inverted to determine the 3d basement depth structure of the QC Basin. The thickness of the basin varies rapidly between ,,,200 m and km in a complex sequence of 3d fault-bounded subbasins. The orientation of, and topography across, several major faults and the overall complexity of the subbasins support a distributed strike-slip extension evolutionary model for the basin. The first arrival travel times are then inverted to determine the 3d velocity structure of the upper (<12 km depth) crust beneath western Hecate Strait. The average 1 d velocity structure and the significant lateral variations are interpreted in terms of regional geology. Wide angle reflection travel times from the Moho constrain the thickness of the crust to be 29 km beneath the eastern coast of the QC Islands. The Moho is deeper under the QC Islands than under Hecate Strait or QC Sound, suggesting that crustal thinning during Tertiary extension was greatest beneath the surface expression of the QC Basin. In an alternate or additional explanation, compression at the plate margin during the last 4 Mamay have been taken up by thickening or under plating of the continental crust adjacent to the margin beneath the QC Islands.
Elicitation of vocabulary from the Hupa Language Dictionary
Creators: name: Parker, Verdena
name: Campbell, Amy
name: Newbold, Lindsey
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: hup

description: Audio files VP-050807-03 through VP-050807-06: elicitation of vocabulary from the Hupa Language Dictionary. English headwords 'sturgeon' to 'suspicious' (VP-050807-03), 'suspicious' to 'sweetheart' (VP-050807-04), 'swell' to 'teeth', (VP-050807-05), and 'telephone' to 'three' (VP-050807-06).
Fast model-based clustering of partial records
Creators: name: Goren, Emily M.
name: Maitra, Ranjan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Methodology (stat.ME)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Machine Learning (cs.LG)
subject: Computation (stat.CO)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences
subject: I.5.3
subject: 62H30, 62G07, 62-04, 62P99

description: Partially recorded data are frequently encountered in many applications and usually clustered by first removing incomplete cases or features with missing values, or by imputing missing values, followed by application of a clustering algorithm to the resulting altered dataset. Here, we develop clustering methodology through a model-based approach using the marginal density for the observed values, assuming a finite mixture model of multivariate $t$ distributions. We compare our approximate algorithm to the corresponding full expectation-maximization (EM) approach that considers the missing values in the incomplete data set and makes a missing at random (MAR) assumption, as well as case deletion and imputation methods. Since only the observed values are utilized, our approach is computationally more efficient than imputation or full EM. Simulation studies demonstrate that our approach has favorable recovery of the true cluster partition compared to case deletion and imputation under various missingness mechanisms, and is at least competitive with the full EM approach, even when MAR assumptions are violated. Our methodology is demonstrated on a problem of clustering gamma-ray bursts and is implemented at https://github.com/emilygoren/MixtClust.
description: 18 pages, 8 figures, 1 table
Slowly rotating black holes and their scalarization
Creators: name: Myung, Yun Soo
name: Zou, De-Cheng
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study scalarization of slowly rotating black holes in the Einstein-scalar-Gauss-Bonnet (GB)-Chern-Simons (CS) theory. In the slow rotation approximation of $a\ll1$ with rotation parameter $a$, the GB term is given by a term for Schwarzschild black hole, whereas the CS term takes a linear term of $a$. The tachyonic instability for slowly rotating black holes represents the onset of spontaneous scalarization. We use the (2+1)-dimensional hyperboloidal foliation method to show the tachyonic instability for slowly rotating black holes by considering the time evolution of a spherically symmetric scalar mode. A threshold (existence) curve is obtained from the constant scalar modes under time evolution, which means the boundary between stable and unstable black holes. It is found that the slowly rotating black holes turn out to be unstable against a spherically symmetric scalar-mode propagation for positive coupling $α$. However, we could not find tachyonic instability and any $a$-bound for scalarization for negative coupling $α$.
description: 16 pages, 4 figures. version to appear in PRD
Understanding the attitudes, knowledge sharing behaviors and task performance of core developers: A longitudinal study
Creators: name: Licorish, Sherlock A.
name: MacDonell, Stephen G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Context: Prior research has established that a few individuals generally dominate project communication and source code changes during software development, regardless of task assignments at project initiation. Objective: While this phenomenon has been noted, prior research has not sought to understand these dominant individuals. Previous work has found that core communicators are the gatekeepers of their teams' knowledge, and the performance of these members was correlated with their teams' success. Building on this work, we have employed a longitudinal approach to study the way core developers' attitudes, knowledge sharing behaviors and task performance change over the course of their project. Method: We first used Social Network Analysis (SNA) and standard statistical analysis techniques to identify and select artifacts and central practitioners from ten different software development teams. We then applied psycholinguistic analysis and directed content analysis (CA) techniques to interpret the content of these practitioners' messages. Finally, we inspected core developers' activities at various points in time during systems' development. Results: Among our findings, we observe that core developers' attitudes and knowledge sharing behaviors were linked to their involvement in actual software development and the demands of their wider project teams. However, core developers appeared to naturally possess high levels of insightful characteristics. Conclusion: Project performance would likely benefit from strategies aimed at surrounding core developers with other competent communicators. Core developers should also be supported by a wider team who are willing to ask questions and challenge their ideas. Finally, the availability of adequate communication channels would help with maintaining positive team climate especially in distributed developments.(Abridged)
description: Journal Paper, 25 pages, 6 figures, 8 tables
Elicitation of vocabulary from the Hupa Language Dictionary
Creators: name: Parker, Verdena
name: Campbell, Amy
name: Newbold, Lindsey
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: hup

description: Audio files VP-040807-02 through VP-040807-07: Elicitation of vocabulary from the Hupa Language Dictionary. English headwords 'scratch' to 'share' (VP-040807-02), 'sharp' to 'side' (VP-040807-03), 'side' to 'slightly' (VP-040807-04), 'slim' to 'sound, there is a' (VP-040807-05), 'sourdough' to 'spoil' (VP-040807-06), and 'spoil' to 'step' (VP-040807-07).
Star Formation in Satellite Galaxies
Creators: name: Gutierrez, C. M.
name: Alonso, M. S.
name: Funes, J. G.
name: Ribeiro, M. B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present narrow-band observations of the H$α$ emission in a sample of 31 satellite orbiting isolated giant spiral galaxies. The sample studied spans the range $-19
description: 25 pages, 11 figures. Accepted for publication in AJ
Relating IS Developers' Attitudes to Engagement
Creators: name: Licorish, Sherlock A.
name: MacDonell, Stephen G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Increasing effort is being directed to understanding the personality profiles of highly engaged information systems (IS) developers and the impact of such profiles on development outcomes. However, there has been a lesser degree of attention paid to studying attitudes at a fine-grained level, and relating such attitudes to developers' in-process activities, in spite of the fact that social motivation theory notes the importance of such a relationship in general group work. We have therefore applied linguistic analysis, text mining and visualization, and statistical analysis techniques to artefacts developed by 474 developers to study these issues. Our results indicate that our sample of IS developers conveyed a range of attitudes while working to deliver systems features, and those practitioners who communicated the most were also the most engaged. Additionally, of eight linguistic dimensions considered, expressions regarding work and achievement, as well as insightful attitudes, were most closely related to developers' engagement. Accordingly, team diversity and the provision of active support for outcome-driven developers may contribute positively to maintaining team balance and performance.
description: Conference paper, 10 pages, 3 figures, 3 tables
Global structures in a composite system of two scale-free discs with a coplanar magnetic field
Creators: name: Lou, Yu-Qing
name: Bai, Xue-Ning
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate a theoretical MHD disc problem involving a composite disc system of gravitationally coupled stellar and gaseous discs with a coplanar magnetic field in the presence of an axisymmetric dark matter halo. The two discs are expediently approximated as razor-thin, a ring-like magnetic field, and a power-law rotation curve in radius . By imposing the scale-free condition, we construct analytically stationary global MHD perturbation configurations for both aligned and logarithmic spiral patterns. MHD perturbation configurations in a composite system of partial discs in the presence of an axisymmetric dark matter halo are also considered. We derive analytically the stationary MHD dispersion relations for both aligned and unaligned perturbation structures and analyze the corresponding phase relationships between surface mass densities and the magnetic field. Compared with earlier results, we obtain three solution branches corresponding to super fast MHD density waves, fast MHD density waves and slow MHD density waves, respectively. By evaluating the unaligned $m=0$ case, we determine the marginal stability curves where the two unstable regimes corresponding to Jeans collapse instability and ring fragmentation instability are identified. We find that the aligned $m=0$ case is simply the limit of the unaligned $m=0$ case with the radial wavenumber $ξ\to0$. We further show that a composite system of partial discs behaves much differently from a composite system of full discs in certain aspects. Our formalism provides a useful theoretical framework in the study of stationary global perturbation configurations for MHD disc galaxies with bars, spirals and barred spirals.
description: 35 pages, 24 figures, Accepted for publication in MNRAS
Understanding the CO₂cycle in the North Pacific Ocean using inverse box models
Creators: name: Matear, Richard J.
Publisher: name: University of British Columbia
Year: 2008

description: Tracer transports across 35°N were computed using the hydrographic data from a synoptic section (INDOPAC) and from the Levitus annual mean section. The tracer transports calculated from the INDOPAC section were better able to close the tracer budgets in the North Pacific than the Levitus section. The transport calculations showed that highly resolved hydrographic data are necessary to accurately determine the tracer transports, and pointed out the sensitivity of the calculation to errors in the Ekman transports and air-sea exchanges of fresh water. The inverse box model was applied to data generated from the Hamburg LSGOC-biogeochemical model. For this data, the mixing transports of the tracers were important for closing the tracer budgets. Applying the inverse box model to the temperature, salinity, total CO2, alkalinity, phosphate, oxygen, POC, calcite, and 14C fields produced poor results. With the addition of velocity shear information, the inverse box model extracted the correct velocity fields and produced air-sea exchanges and detrital rain rates consistent with the known values from the Hamburg model. A model of the nutrient and carbon cycles in the North Pacific north of 24°N is formulated, and water flow rates, eddy mixing coefficients, particle fluxes and air-sea exchange rates of fresh water, heat, CO2 and 02 are calculated. The model incorporates geostrophy, wind-driven Ekman transports and budget equations for a suite of seven tracers. Geostrophic transports are based on two highly resolved synoptic sections across the North Pacific at 24°N (Roemmich et al., 1991) and 47°N (Talley et al., 1991). Tracer distributions are obtained from historical station data. Budgets of mass, heat, salt, oxygen, phosphate, silicate, CO2 and alkalinity are satisfied simultaneously in the North Pacific. The water transports in the model are in agreement with other transport calculations for the Pacific. The calculated heat transport showed that the subtropical North Pacific transfers heat into the atmosphere while the subarctic ocean gains heat. The net heat lost by the North Pacific ocean was 0.12 ± 0.08 PW. The North Pacific Ocean was calculated to be a sink of 0.1 ± 0.1 Gt C yr-1 of atmospheric carbon. The calculated maximum values of new production for the subarctic and subtropical regions are 42 g C m-2 yr-1 and 12 g C m-2 yr-1respectively. The influence of the dissolved organic matter on the nutrient and carbon cycles is investigated using the data reported by Suzuki et al., (1985). The model showed that the dissolved organic matter had little influence on the carbon and nutrient cycles. More data for the dissolved organic matter should be collected to verify this result.
Classical simulation of infinite-size quantum lattice systems in two spatial dimensions
Creators: name: Jordan, J.
name: Orus, R.
name: Vidal, G.
name: Verstraete, F.
name: Cirac, J. I.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present an algorithm to simulate two-dimensional quantum lattice systems in the thermodynamic limit. Our approach builds on the {\em projected entangled-pair state} algorithm for finite lattice systems [F. Verstraete and J.I. Cirac, cond-mat/0407066] and the infinite {\em time-evolving block decimation} algorithm for infinite one-dimensional lattice systems [G. Vidal, Phys. Rev. Lett. 98, 070201 (2007)]. The present algorithm allows for the computation of the ground state and the simulation of time evolution in infinite two-dimensional systems that are invariant under translations. We demonstrate its performance by obtaining the ground state of the quantum Ising model and analysing its second order quantum phase transition.
description: 4 pages, 6 figures, 1 table. Revised version, with new diagrams and plots. The results on classical systems can now be found at arXiv:0711.3960
Numerical and experimental studies to model and reduce the impedance in the CERN Super Proton Synchrotron (SPS)
Creators: name: Beck, Mario
Publisher: name: Universität Rostock
Year: 2018
Subjects: subject: 530 Physics
subject: 621.3 Electrical Engineering, Electronics

description: Intensity-driven beam instabilities are studied in simulations with a refined impedance model and in experimental measurements for this thesis. The High Luminosity Large Hadron Collider (HL-LHC) project at CERN aims for an increase in the integrated luminosity in the Large Hadron Collider (LHC). To achieve this goal the LHC injector chain has to be upgraded. The last LHC injector, the Super Proton Synchrotron (SPS), intends to accelerate beams with twice the present intensity.
AGN Heating through Cavities and Shocks
Creators: name: Nulsen, P. E. J.
name: Jones, C.
name: Forman, W. R.
name: David, L. P.
name: McNamara, B. R.
name: Rafferty, D. A.
name: Birzan, L.
name: Wise, M. W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Three comments are made on AGN heating of cooling flows. A simple physical argument is used to show that the enthalpy of a buoyant radio lobe is converted to heat in its wake. Thus, a significant part of ``cavity'' enthalpy is likely to end up as heat. Second, the properties of the repeated weak shocks in M87 are used to argue that they can plausibly prevent gas close to the AGN from cooling. As the most significant heating mechanism at work closest to the AGN, shock heating probably plays a critical role in the feedback mechanism. Third, results are presented from a survey of AGN heating rates in nearby giant elliptical galaxies. With inactive systems included, the overall AGN heating rate is reasonably well matched to the total cooling rate for the sample. Thus, intermittent AGN outbursts are energetically capable of preventing the hot atmospheres of these galaxies from cooling and forming stars.
description: 6 pages, 2 figures, for proceedings of "Heating vs. Cooling in Galaxies and Clusters of Galaxies," eds H. Boehringer, P. Schuecker, G. W. Pratt & A. Finoguenov, in Springer-Verlag series "ESO Astrophysics Symposia."
On Automatic Parsing of Log Records
Creators: name: Rand, Jared
name: Miranskyy, Andriy
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Software log analysis helps to maintain the health of software solutions and ensure compliance and security. Existing software systems consist of heterogeneous components emitting logs in various formats. A typical solution is to unify the logs using manually built parsers, which is laborious. Instead, we explore the possibility of automating the parsing task by employing machine translation (MT). We create a tool that generates synthetic Apache log records which we used to train recurrent-neural-network-based MT models. Models' evaluation on real-world logs shows that the models can learn Apache log format and parse individual log records. The median relative edit distance between an actual real-world log record and the MT prediction is less than or equal to 28%. Thus, we show that log parsing using an MT approach is promising.
description: Shortened version accepted for publication in Proceedings of the 43rd International Conference on Software Engineering: New Ideas and Emerging Results, 2021
Elicitation of vocabulary from the Hupa Language Dictionary
Creators: name: Parker, Verdena
name: Newbold, Lindsey
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: hup

description: Audio file VP-050807-01: Elicitation of vocabulary from the Hupa Language Dictionary. English headwords 'step-relative' to 'sturgeon'.