cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Σχεδίαση εκτυπωμένων κεραιών MIMO κατάλληλων για ασύρματα δίκτυα νέας γενιάς
title: Printed MIMO antennas design for the next generation wireless network
titleType: AlternativeTitle
Creators: name: Γκιώνης, Ιωάννης
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2022
Subjects: 5G
Δίκτυα 5G
Στοιχειοκεραίες
MIMO
Κεραίες μικροταινίας
CST-STUDIO
Ασύρματες επικοινωνίες
Διαγράμματα ακτινοβολίας

description: Η παρούσα διπλωματική εργασία έχει σκοπό την μελέτη και την ανάλυση κεραιών MIMO για ασύρματα δίκτυα νέας γενιάς 5G. Η μελέτη περιλαμβάνει καλή γνώση θεωρίας στοιχειοκεραιών και επιπλέον εξοικείωση με το λογισμικό CST-STUDIO για την προσωμείωση της κεραίας. Το πρώτο κεφάλαιο ξεκινά με βασικές παραμέτρους των κεραιών, όπως τα χαρακτηριστικά ενός διαγράμματος ακτινοβολίας, το κέρδος, η κατευθυντικότητα είναι έννοιες που θα πρέπει κάποιος να γνωρίζει για την υλοποίηση μιας τέτοια είδους κατασκευής. Το δεύτερο κεφάλαιο αφορά της στοιχειοκεραίες που είναι βασικό κομμάτι της διπλωματικής εργασίας. Είναι φανερό πως οι στοιχεοκεραίες είναι το επίκεντρο για την δημιουργία ασυρμάτων δικτύων νέας γενιάς διότι μπορούν να σαρώνουν και στις τρεις διαστάσεις του χώρου. Επιπλέον γίνεται περιγραφή και άλλων στοιχειοκεραιών όπως η ευρύπλευρη και η ακροπυροδοτική στοιχειοκεραία καθώς και η ανάλυση σε πίνακες για διάφορους υπολογισμούς. Στο τρίτο κεφάλαιο γίνεται εισαγωγή για μικροταινιακές κεραίες και τους διάφορους τρόπους τροφοδοσίας τους. Είναι φανερό ότι μια τέτοια είδους κατασκευή έχει αρκετά πλεονεκτήματα σε συστήματα επικοινωνιών υψηλών αποδόσεων διότι είναι χαμηλού προφίλ, χαμηλού βάρους, με σύγχρονη τεχνολογία τυπωμένων κυκλωμάτων. Το τέταρτο κεφάλαιο αφορά τις ασύρματες επικοινωνίες και τους διάφορους τρόπους μετάδοσης του ηλεκτρομαγνητικούς κύματος από το πομπό στον δέκτη. Επίσης γίνεται περιγραφή της πολυδιαδρομικής διάδοσης, των συστημάτων κεραιών MIMO, της τεχνικής μετάδοσης OFDM και την λειτουργεία των έξυπνων κεραιών μέσω αλγορίθμων. Το τελευταίο κεφάλαιο της διπλωματικής εργασίας αποσκοπεί στην δημιουργία μιας στοιχειοκεραίας 4Χ4 στα 5GHz με τετράγωνα μικροταινιακά στοιχεία. Αρχικά εξετάζεται ως μεμονωμένο στοιχείο και ύστερα ως στοιχεοκεραία αναλύωντας της S-παραμέτρους και το διάγραμμα ακτινοβολίας. Επίσης κατασκευάζεται το δίκτυο τροφοδοσίας και γίνεται τοποθέτηση phase shifters για την περιστροφή του λοβού ακτινοβολίας ως προς οποιαδήποτε κατεύθυνση και έτσι να θεωρηθεί κεραία MIMO. Η κατασκευή γίνεται σύμφωνα με το λογισμικό CST-STUDIO.
Magnetic Dirac-harmonic maps
Creators: name: Branding, Volker
Publisher: name: arXiv
Year: 2013
Subjects: subject: Differential Geometry (math.DG)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We study a functional, whose critical points couple Dirac-harmonic maps from surfaces with a two form. The critical points can be interpreted as coupling the prescribed mean curvature equation to spinor fields. On the other hand, this functional also arises as part of the supersymmetric sigma model in theoretical physics. In two dimensions it is conformally invariant. We call critical points of this functional magnetic Dirac-harmonic maps. We study geometric and analytic properties of magnetic Dirac-harmonic maps including their regularity and the removal of isolated singularities.
Demonstration of Sub-micron UCN Position Resolution using Room-temperature CMOS Sensor
Creators: name: Lin, S.
name: Baldwin, J. K.
name: Blatnik, M.
name: Clayton, S. M.
name: Cude-Woods, C.
name: Currie, S. A.
name: Filippone, B.
name: Fries, E. M.
name: Geltenbort, P.
name: Holley, A. T.
name: Li, W.
name: Liu, C. Y.
name: Makela, M.
name: Morris, C. L.
name: Musedinovic, R.
name: O'Shaughnessy, C.
name: Pattie, R. W.
name: Salvat, D. J.
name: Saunders, A.
name: Sharapov, E. I.
name: Singh, M.
name: Sun, X.
name: Tang, Z.
name: Uhrich, W.
name: Wei, W.
name: Wolfe, B.
name: Young, A. R.
name: Wang, Z.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: High spatial resolution of ultracold neutron (UCN) measurement is of growing interest to UCN experiments such as UCN spectrometers, UCN polarimeters, quantum physics of UCNs, and quantum gravity. Here we utilize physics-informed deep learning to enhance the experimental position resolution and to demonstrate sub-micron spatial resolutions for UCN position measurements obtained using a room-temperature CMOS sensor, extending our previous work [1, 2] that demonstrated a position uncertainty of 1.5 microns. We explore the use of the open-source software Allpix Squared to generate experiment-like synthetic hit images with ground-truth position labels. We use physics-informed deep learning by training a fully-connected neural network (FCNN) to learn a mapping from input hit images to output hit position. The automated analysis for sub-micron position resolution in UCN detection combined with the fast data rates of current and next generation UCN sources will enable improved precision for future UCN research and applications.
МОТИВАЦИЯ КАК МЕХАНИЗМ ЭФФЕКТИВНОГО УПРАВЛЕНИЯ ПЕРСОНАЛОМ
Creators: name: ШИНКАРЮК ДАРЬЯ ВАЛЕРЬЕВНА
Publisher: name: Наука, образование и культура
Year: 2020
Subjects: УПРАВЛЕНИЕ ПЕРСОНАЛОМ
МОТИВАЦИЯ
МОТИВЫ
САМОМОТИВАЦИЯ
АЛГОРИТМ УПРАВЛЕНИЯ
УДОВЛЕТВОРЕНИЕ ПОТРЕБНОСТЕЙ

description: В статье анализируется проблемы подхода различных авторов к эффективному управлению персоналом, проводится анализ данных литературных источников по вопросам оценки методов управления персоналом. Рассматривается понятие «мотивация» как один из инструментов эффективного управления. Изучается взаимосвязь амбиций и мотивации; влияние самомотивации на успешность профессиональной деятельности.
The electronic structure of the silicon vacancy color center in diamond
Creators: name: Hepp, Christian
name: Müller, Tina
name: Waselowski, Victor
name: Becker, Jonas N.
name: Pingault, Benjamin
name: Sternschulte, Hadwig
name: Steinmüller-Nethl, Doris
name: Gali, Adam
name: Maze, Jeronimo R.
name: Atatüre, Mete
name: Becher, Christoph
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The negatively charged silicon vacancy (SiV) color center in diamond has recently proven its suitability for bright and stable single photon emission. However, its electronic structure so far has remained elusive. We here explore the electronic structure by exposing single SiV defects to a magnetic field where the Zeeman effect lifts the degeneracy of magnetic sublevels. The similar response of single centers and a SiV ensemble in a low strain reference sample proves our ability to fabricate almost perfect single SiVs, revealing the true nature of the defect's electronic properties. We model the electronic states using a group-theoretical approach yielding a good agreement with the experimental observations. Furthermore, the model correctly predicts polarization measurements on single SiV centers and explains recently discovered spin selective excitation of SiV defects.
description: 5 pages, 4 figures, 1 table
Testing Chern-Simons gravity with black holes?
Creators: name: Vincent, F. H.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the possibility to distinguish the small-coupling, slow-rotation black hole solution of Chern-Simons (CS) gravity from the Kerr solution. We develop simulations of electromagnetic observables in the vicinity of CS and Kerr black holes. We show that the typical relative observable difference between CS and Kerr spacetimes is of the order of 0.1% thus beyond reach of current or near-future instruments.
description: 14 pages, 5 figures, accepted by CQG
Rotation reduces convective mixing in Jupiter and other gas giants
Creators: name: Fuentes, J. R.
name: Anders, Evan H.
name: Cumming, Andrew
name: Hindman, Bradley W.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Recent measurements of Jupiter's gravitational moments by the Juno spacecraft and seismology of Saturn's rings suggest that the primordial composition gradients in the deep interior of these planets have persisted since their formation. One possible explanation is the presence of a double-diffusive staircase below the planet's outer convection zone, which inhibits mixing across the deeper layers. However, hydrodynamic simulations have shown that these staircases are not long-lasting and can be disrupted by overshooting convection. In this paper we suggests that planetary rotation could be another factor for the longevity of primordial composition gradients. Using rotational mixing-length theory and 3D hydrodynamic simulations, we demonstrate that rotation significantly reduces both the convective velocity and the mixing of primordial composition gradients. In particular, for Jovian conditions at $t\sim10^{8}~\mathrm{yrs}$ after formation, rotation reduces the convective velocity by a factor of 6, and in turn, the kinetic energy flux available for mixing gets reduced by a factor of $6^3\sim 200$. This leads to an entrainment timescale that is more than two orders of magnitude longer than without rotation. We encourage future hydrodynamic models of Jupiter and other gas giants to include rapid rotation, because the decrease in the mixing efficiency could explain why Jupiter and Saturn are not fully mixed.
description: Accepted for publication in the Astrophysical Journal Letters
Some results on energy-conserving lattice Boltzmann models
Creators: name: Lallemand, Pierre
name: Dubois, François
Publisher: name: arXiv
Year: 2013
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We consider the problem of ''energy conserving'' lattice Boltzmann models. A major difficulty observed in previous studies is the coupling between the viscous and thermal waves even at moderate wave numbers. We propose a theoretical framework based founded on the knowledge of the partial equivalent equations of the lattice Boltzmann scheme at several orders of precision. With the help of linearized models (inviscid and dissipative advective acoustics and classical acoustics), we suggest natural sets of relations for the parameters of lattice Boltzmann schemes. The application is proposed for three two-dimensional schemes. Numerical test cases for simple linear and nonlinear waves establish that the main difficulty in the previous contributions can now be overcome.
description: 21 pages
Modelling Circumbinary Planets: The case of Kepler-38
Creators: name: Kley, Wilhelm
name: Haghighipour, Nader
Publisher: name: arXiv
Year: 2014
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Recently, a number of planets orbiting binary stars have been discovered by the Kepler space telescope. In a few systems the planets reside close to the dynamical stability limit. Due to the difficulty of forming planets in such close orbits, it is believed that they have formed further out in the disk and migrated to their present locations. Our goal is to construct more realistic models of planet migration in circumbinary disks, and to determine the final position of these planets. In our work, we focus on the system Kepler-38. The evolution of the circumbinary disk is studied using two-dimensional hydrodynamical simulations. We study locally isothermal disks as well as more realistic models with viscous heating, radiative cooling from the disk surfaces, and radiative diffusion in the disk mid plane. After the disk has been brought into equilibrium, a 115 Earth-mass planet is embedded and its evolution is followed. In all cases the planets stop inward migration near the inner edge of the disk. In isothermal disks with a typical disk scale height of H/r = 0.05, the final outcome agrees very well with the observed location of planet Kepler-38b. For the radiative models, the disk thickness and location of the inner edge is determined by the mass in the system. For surface densities in the order of 3000 g/cm^2 at 1 AU, the inner gap lies close to the binary and planets stop in the region between the 5:1 and 4:1 mean-motion resonances with the binary. A model with a disk with approximately a quarter of the mass yields a final position very close to the observed one. For planets migrating in circumbinary disks, the final position is dictated by the structure of the disk. Knowing the observed orbits of circumbinary planets, radiative disk simulations with embedded planets can provide important information on the physical state of the system during the final stages of its evolution.
description: 14 pages, accepted by Astronomy & Astrophysics, Animations available under: http://www.tat.physik.uni-tuebingen.de/~kley/projects/kep38/
Top-Ranked Cycle Flux Network Analysis of Molecular Photocells
Creators: name: Gupt, Nikhil
name: Ghosh, Shuvadip
name: Ghosh, Arnab
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We introduce a top-ranked cycle flux ranking scheme of network analysis to assess the performance of molecular junction solar cells. By mapping the Lindblad master equation to the quantum-transition network, we propose a microscopic Hamiltonian description underpinning the rate equations commonly used to characterize molecular photocells. Our approach elucidates the paramount significance of edge flux and unveils two pertinent electron transfer pathways that play equally important roles in robust photocurrent generation. Furthermore, we demonstrate that non-radiative loss processes impede the maximum power efficiency of photocells, which may otherwise be above the Curzon-Ahlborn limit. These findings shed light on the intricate functionalities that govern molecular photovoltaics and offer a comprehensive approach to address them in a systematic way.
description: 14 pages, 8 figures
Ακριβείς και αναδρομικές σχέσεις για τις ροπές του χρόνου χρεοκοπίας στο κλασικό πρότυπο της θεωρίας κινδύνων
Creators: name: Ζορμπά, Φωτεινή
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2023
Subjects: subject: Ροπές στο χρόνο χρεοκοπίας
subject: Χρόνος χρεοκοπίας
subject: Προσέγγιση De Vylder

description: Η αναλογιστική επιστήμη είναι ο κλάδος ο οποίος εφαρμόζει στατιστικές και μαθηματικές μεθόδους για να εκτιμήσει τον κίνδυνο της αβεβαιότητας σε μελλοντικά γεγονότα σε ασφαλιστικές, χρηματοοικονομικές επενδύσεις και σε άλλους κλάδους και να τον ελαχιστοποιήσει. Η θεωρία χρεοκοπίας, που αποτελεί κλάδο της θεωρίας κινδύνων, με τα κατάλληλα μαθηματικά μοντέλα μας περιγράφει τις ποσότητες για την πιθανότητα χρεοκοπίας και μελετάει την κατανομή του πλεονάσματος πριν τη χρεοκοπία και του ελλείματος τη στιγμή της χρεοκοπίας. Στην παρούσα διπλωματική εργασία θα γίνει μελέτη για την ελλειμματική τυχαία μεταβλητή που αναφέρεται στο χρόνο, Τ, όπου θα συμβεί η χρεοκοπία στο κλασσικό πρότυπο. Ενδιαφέρον έχει να εξεταστεί η τυχαία μεταβλητή που προκύπτει 𝑇𝑐 (ο χρόνος χρεοκοπίας, δοθέντος, ότι θα συμβεί η χρεοκοπία) η οποία είναι μη ελλειμματική και δεν είναι γνωστή η πυκνότητα της. Γενικά είναι δύσκολο να προσδιοριστούν αυτές οι ροπές με ακριβή υπολογισμό, για αυτό το λόγο χρησιμοποιούνται προσεγγίσεις. Για τη συγκεκριμένη εργασία θα προσπαθήσουμε να εξετάσουμε τις δεσμευμένες ροπές του χρόνου χρεοκοπίας και ποσότητες που συνδέονται με τις τρεις πρώτες ροπές της μεταβλητής 𝑇𝑐, όπως ο συντελεστής μεταβλητότητας και ο συντελεστής ασυμμετρίας μέσω παραδειγμάτων και διαγραμμάτων,. Αυτό θα γίνει με τη βοήθεια του μαθηματικού πακέτου Mathematica και της γλώσσας προγραμματισμού R. Διάφορες προσεγγίσεις έχουν χρησιμοποιηθεί για τη μελέτη και τις ιδιότητες των πιθανοτήτων χρεοκοπίας στο χρόνο. Οι έρευνες του Gerber (1987) και των Dufresne & Gerber (1988) επικεντρώνονται στην ανάλυση της έκφρασης για την πιθανότητα χρεοκοπίας και στη συνάρτηση της κατανομής του πλεονάσματος πριν από το χρόνο χρεοκοπίας. Υπάρχουν μέθοδοι για τον υπολογισμό και προσέγγιση των ροπών και της πυκνότητας 𝑇𝑐 (Dickson & Waters, 2002), όμως η πιο ακριβής προσέγγιση είναι του De Vylder (1978). Το μέγεθος των αποζημιώσεων στα παραδείγματα που θα εξεταστούν είναι είτε συνδυασμός Εκθετικών κατανομών είτε Γάμμα κατανομών.
Language Models for German Text Simplification: Overcoming Parallel Data Scarcity through Style-specific Pre-training
Creators: name: Anschütz, Miriam
name: Oehms, Joshua
name: Wimmer, Thomas
name: Jezierski, Bartłomiej
name: Groh, Georg
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Automatic text simplification systems help to reduce textual information barriers on the internet. However, for languages other than English, only few parallel data to train these systems exists. We propose a two-step approach to overcome this data scarcity issue. First, we fine-tuned language models on a corpus of German Easy Language, a specific style of German. Then, we used these models as decoders in a sequence-to-sequence simplification task. We show that the language models adapt to the style characteristics of Easy Language and output more accessible texts. Moreover, with the style-specific pre-training, we reduced the number of trainable parameters in text simplification models. Hence, less parallel data is sufficient for training. Our results indicate that pre-training on unaligned data can reduce the required parallel data while improving the performance on downstream tasks.
description: Accepted to ACL Findings 2023
ПАРАДОКСЫ ГРАВИТАЦИИ И ЭЛЕКТРОМАГНЕТИЗМА ИЛИ ЧТО НЕ МОГ ЗНАТЬ ФОН БРАУН. ЧАСТЬ 3. МАГНЕТИЗМ И ЭЛЕКТРИЧЕСКИЙ ТОК
Creators: name: ИЛЬЧЕНКО ЛЕОНИД ИВАНОВИЧ
name: ИЛЬЧЕНКО ДМИТРИЙ ВЛАДИСЛАВОВИЧ
Publisher: name: Проблемы современной науки и образования
Year: 2020
Subjects: МАГНИТНОЕ ПОЛЕ
ЭЛЕКТРОМАГНЕТИЗМ
ВИХРЬ ВСЕПРОНИКАЮЩЕЙ СРЕДЫ
ЗАКОНЫ АМПЕРА
ЛОРЕНЦА
ЛЕНЦА
G-ФАКТОР
ЛАРМОРОВСКАЯ ПРЕЦЕССИЯ
СПИН
ЗАРЯД
МОДЕЛЬ ЭЛЕКТРОНА
ЭФИР
ИНДУКЦИЯ
ЭЛЕКТРИЧЕСКИЙ ТОК
КОВАЛЕНТНАЯ СВЯЗЬ
ДИАМАГНЕТИЗМ
КУПЕРОВСКАЯ ПАРА
СВЕРХПРОВОДИМОСТЬ
THE MAGNETIC FIELD
ELECTROMAGNETISM
WHIRLWIND OF ВСЕПРОНИКАЮЩЕЙ ENVIRONMENT
LAWS OF AMPERE
LOURENC
LENC
SPIN
CHARGE
MODEL OF ELECTRON
ETHER
INDUCTION
ELECTRIC CURRENT
COVALENTLY CONNECTION
DIAMAGNETISM
COOPER’S PAIR
SUPERCONDUCTIVITY

description: Показана несостоятельность современной интерпретации взаимодействий двух проводников с током как результат искаженного представления о природе электромагнетизма. Применен нетрадиционный подход на основе трех принципов к выяснению природы сил взаимодействия Ампера, Лоренца. По аналогии с опытами Герлаха-Штерна, обосновывающих наличие спина, предложено представление о “заряде” микрочастиц их вращательным движением. Строится физическая модель электрона, включающая спин, заряд, стабильность. Объяснена природа сил ковалентной химической связи, связей в металлической кристаллической решетке и диамагнетизма на основе предлагаемой модели орбитального вращения электронов. Примерами из опытов дается обоснование природы электрического тока как направленного потока всепроникающей среды (субстанции, эфира) передаваемый к потребителю по проводам в каналах «проводимости», которые образуютcя благодаря орбитальному вращению электронов.
Schottky mass measurements of heavy neutron-rich nuclides in the element range $70\leZ \le79$ at the ESR
Creators: name: Shubina, D.
name: Cakirli, R. B.
name: Litvinov, Yu. A.
name: Blaum, K.
name: Brandau, C.
name: Bosch, F.
name: Carroll, J. J.
name: Casten, R. F.
name: Cullen, D. M.
name: Cullen, I. J.
name: Deo, A. Y.
name: Detwiler, B.
name: Dimopoulou, C.
name: Farinon, F.
name: Geissel, H.
name: Haettner, E.
name: Heil, M.
name: Kempley, R. S.
name: Kozhuharov, C.
name: Knöbel, R.
name: Kurcewicz, J.
name: Kuzminchuk, N.
name: Litvinov, S. A.
name: Liu, Z.
name: Mao, R.
name: Nociforo, C.
name: Nolden, F.
name: Patyk, Z.
name: Plass, W. R.
name: Prochazka, A.
name: Reed, M. W.
name: Sanjari, M. S.
name: Scheidenberger, C.
name: Steck, M.
name: Stöhlker, Th.
name: Sun, B.
name: Swan, T. P. D.
name: Trees, G.
name: Walker, P. M.
name: Weick, H.
name: Winckler, N.
name: Winkler, M.
name: Woods, P. J.
name: Yamaguchi, T.
name: Zhou, C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Storage-ring mass spectrometry was applied to neutron-rich $^{197}$Au projectile fragments. Masses of $^{181,183}$Lu, $^{185,186}$Hf, $^{187,188}$Ta, $^{191}$W, and $^{192,193}$Re nuclei were measured for the first time. The uncertainty of previously known masses of $^{189,190}$W and $^{195}$Os nuclei was improved. Observed irregularities on the smooth two-neutron separation energies for Hf and W isotopes are linked to the collectivity phenomena in the corresponding nuclei.
description: 10 pages, 9 figures, 2 tables
title: Plan von Wien und dessen Vorstädten 1848; [1848]
title: 1. Burg 2. Löbl 3. Mölker ... 29. Stephan-Kirche ; Lager von Windisch-Grätz ... Lager v. Auerberg ... Lager v. Iellalich
titleType: Subtitle
Creators: name: (:Unav)
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2018

description: Vorlageform der Veröffentlichungsangabe: Steind. v. L Schmitt Offenbach ...
Local symmetry dynamics in one-dimensional aperiodic lattices
Creators: name: Morfonios, C.
name: Schmelcher, P.
name: Kalozoumis, P. A.
name: Diakonos, F. K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A unifying description of lattice potentials generated by aperiodic one-dimensional sequences is proposed in terms of their local reflection or parity symmetry properties. We demonstrate that the ranges and axes of local reflection symmetry possess characteristic distributional and dynamical properties which can be determined for every aperiodic binary lattice. A striking aspect of such a property is given by the return maps of sequential spacings of local symmetry axes, which typically traverse few-point symmetry orbits. This local symmetry dynamics allows for a classification of inherently different aperiodic lattices according to fundamental symmetry principles. Illustrating the local symmetry distributional and dynamical properties for several representative binary lattices, we further show that the renormalized axis spacing sequences follow precisely the particular type of underlying aperiodic order. Our analysis thus reveals that the long-range order of aperiodic lattices is characterized in a compellingly simple way by its local symmetry dynamics.
description: 15 pages, 12 figures
SwiftCloud: Fault-Tolerant Geo-Replication Integrated all the Way to the Client Machine
Creators: name: Zawirski, Marek
name: Bieniusa, Annette
name: Balegas, Valter
name: Duarte, Sérgio
name: Baquero, Carlos
name: Shapiro, Marc
name: Preguiça, Nuno
Publisher: name: arXiv
Year: 2013
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: Client-side logic and storage are increasingly used in web and mobile applications to improve response time and availability. Current approaches tend to be ad-hoc and poorly integrated with the server-side logic. We present a principled approach to integrate client- and server-side storage. We support mergeable and strongly consistent transactions that target either client or server replicas and provide access to causally-consistent snapshots efficiently. In the presence of infrastructure faults, a client-assisted failover solution allows client execution to resume immediately and seamlessly access consistent snapshots without waiting. We implement this approach in SwiftCloud, the first transactional system to bring geo-replication all the way to the client machine. Example applications show that our programming model is useful across a range of application areas. Our experimental evaluation shows that SwiftCloud provides better fault tolerance and at the same time can improve both latency and throughput by up to an order of magnitude, compared to classical geo-replication techniques.
ТРЕУГОЛЬНИК ПАСКАЛЯ - ОСНОВНОЙ ОБЪЕКТ ТЕОРИИ ВЕРОЯТНОСТЕЙ И КОМБИНАТОРИКИ ДЛИННЫХ ПОСЛЕДОВАТЕЛЬНОСТЕЙ
Creators: name: ФИЛАТОВ ОЛЕГ ВЛАДИМИРОВИЧ
Publisher: name: Проблемы современной науки и образования
Year: 2020
Subjects: КОМБИНАТОРИКА
ТРЕУГОЛЬНИК ПАСКАЛЯ
СЛУЧАЙНАЯ БИНАРНАЯ ПОСЛЕДОВАТЕЛЬНОСТЬ
COMBINATORICS
PASCAL'S TRIANGLE
RANDOM BINARY SEQUENCE

description: Треугольник Паскаля - это один из старейших математических объектов, он связан с биномом Ньютона и с комбинаторными перестановками. Теперь оказалось, что треугольник Паскаля является важным объектом в теории вероятностей, так как по его комбинаторным коэффициентам можно рассчитать численности составных событий, которые образуют случайные бинарные последовательности. ДНК и мтДНК оказались так же «родственниками» треугольника Паскаля по линии составных событий, поэтому ДНК и мтДНК хорошо раскладываются в матрицу случайных составных событий. Также у треугольника Паскаля существует такая же, как и у ДНК, комбинаторная связь со многими разговорными языками мира. В статье даны формулы, связывающие треугольник Паскаля со случайными бинарными последовательностями и «Комбинаторикой длинных последовательностей».
Modelling magnetism of C at O and B monovacancies in graphene
Creators: name: Kaloni, T. P.
name: Kahaly, M. Upadhyay
name: Faccio, R.
name: Schwingenschlögl, U.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The presence of defects can introduce important changes in the electronic structure of graphene, leading to phenomena such as C magnetism. In addition, vacancies are reactive and permit the incorporation of dopants. This paper discusses the electronic properties of defective graphene for O and B decoration. Phonon calculations allow us to address directly the stability of the systems under study. We show that it is possible to obtain magnetic solutions with and without dangling bonds, demonstrating that C magnetism can be achieved in the presence of B and O.
description: 11 pages, 4 figures, and 1 Table
ОСОБЕННОСТИ НЕВЕРБАЛЬНОЙ СЕМИОТИКИ УЗБЕКОВ ТАШКЕНТА: ЗАЩИТНЫЕ ФУНКЦИИ ТКАНЫХ ИЗДЕЛИЙ
Creators: name: ЗУНУНОВА ГУЛЬЧЕХРА ШАВКАТОВНА
Publisher: name: Проблемы современной науки и образования
Year: 2020
Subjects: ПОВЕРЬЯ
ОДЕЖДА
УЗБЕКИ
МАХАЛЛЯ
ОБРЯД
РИТУАЛ
ОБЕРЕГ
BELIEFS
CLOTHING
UZBEKS
MAHALLA
RITE
RITUAL
AMULET

description: В статье рассматриваются поверья узбеков Ташкента, связанные с защитными функциями тканых изделий. Автор прослеживает идею о том, что их обережные свойства можно трактовать как невербальный код коммуникации в том числе. Обрядово-ритуальная одежда и другие элементы тканых изделий интерпретируются как апотропейный пласт средств, направленный на отвращение вредоносных сил. Показано, что обережные функции одежды и тканей охватывают гетерогенные явления, уходящие своими корнями в магию, фетишизм и другие формы религии, а самобытные поверья объединены в веру в сверхъестественные силы и в то, что их можно «укрощать». Отмечается, что многие представления, связанные с ритуально-обрядовой одеждой и другими ткаными изделиями в настоящее время забыты, но тем не менее ее апотропейная суть продолжает иметь значение.
Controlling a Software-Defined Network via Distributed Controllers
Creators: name: Yazici, Volkan
name: Sunay, M. Oguz
name: Ercan, Ali O.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: In this paper, we propose a distributed OpenFlow controller and an associated coordination framework that achieves scalability and reliability even under heavy data center loads. The proposed framework, which is designed to work with all existing OpenFlow controllers with minimal or no required changes, provides support for dynamic addition and removal of controllers to the cluster without any interruption to the network operation. We demonstrate performance results of the proposed framework implemented over an experimental testbed that uses controllers running Beacon.
description: 6 pages, 4 figures
ИСТОРИЯ ДРЕВНЕЙ ХОРЕЗМСКОЙ КУЛЬТУРЫ. РОЛЬ И ЗНАЧЕНИЕ ДРЕВНИХ РЕЛИГИОЗНЫХ ИДЕЙ И РЕЛИГИОЗНЫХ ВЗГЛЯДОВ
Creators: name: АЛЛАНАЗАРОВ СИРОЖБЕК БЕКЧАНОВИЧ
Publisher: name: Academy
Year: 2020
Subjects: ХОРЕЗМИЙЦЫ
РЕЛИГИОЗНЫЕ ВЕРОВАНИЯ
ОБРЯДЫ
ЛЕГЕНДЫ
ПРОРОК СОЛОМОН
ВЕЛИКАНЫ
ОБЫЧАИ
СЕМЬЯ И БРАК

description: В статье обсуждаются легенды о хорезмийцах и некоторые аспекты малоизученной истории культуры. В статье также подробно рассказывается о примитивных религиозных представлениях хорезмийцев, о различных обрядах и традициях, возникших в связи с условиями повседневной работы.
Haunting History: Virginia Woolf, Vivian Maier, and the Twentieth-Century Flâneuse
Creators: name: Reeves, Abbie
Publisher: name: University of Chicago
Year: 2019
Subjects: subject: flâneuse
subject: Virginia Woolf
subject: Vivian Maier
subject: gender inequality
subject: arts & culture
subject: urban life

description: This paper will examine the work of two female artists who attest to the historical presence of the flâneuse and exemplify the practice of flânerie at various points during the twentieth century: Virginia Woolf and Vivian Maier. In her 1930 essay “Street Haunting,” Woolf challenges the convention that flânerie is a male practice. Taking on the persona of the flâneuse, she engages in the same type of imaginative ambulation usually reserved for the male flâneur, forging a sense of identity through her wanderings and channeling the nineteenth-century flâneur’s curiosity about city life. In turn, Maier uses the medium of photography to capture both the spectacular and the quotidian aspects of the mid-twentieth century American city. Her photographs of Chicago and New York evoke the inquisitive spirit of the flâneuse in their portrayal of everyday scenes. While these artists practice a form of flânerie that is similar to male flânerie in its basic premise and its creative output, it is fundamentally different in its more empathetic relationship with the city crowds as well as its fraught relationship with domesticity and consumerism. Drawing on the work of twentieth and twenty-first century literary critics and social thinkers, I argue that Woolf and Maier reclaim and revise the outdated practice of flânerie in a way that is informed by the gendered history of urban space and urban mobility. Understanding these artists as flâneuses allows us to trace the evolution of flânerie into the twentieth century, to acknowledge the lived reality of the female flâneur, and to turn a more critical eye to the social structures and economic institutions that shape the goings-on of city life.
ДНК КОМБИНАТОРИКА, ПРИМЕНЕНИЕ МТДНК МАТРИЦ ДЛЯ РАСЧЁТА РОДСТВЕННЫХ СВЯЗЕЙ. ТЕОРЕМА О РАВЕНСТВЕ НУЛЮ КОРРЕКТИРУЮЩЕЙ МТДНК МАТРИЦЫ
Creators: name: ФИЛАТОВ ОЛЕГ ВЛАДИМИРОВИЧ
Publisher: name: Проблемы современной науки и образования
Year: 2020
Subjects: МТДНК
КОМБИНАТОРИКА
МАТРИЦА
ЭЛЕМЕНТАРНОЕ СОБЫТИЕ
ЭЛ
КДП
AMPHIBIANS
MTDNA
COMBINATORICS
MATRIX
ELEMENTARY EVENT
EL
KDP

description: В последнее время в математике открыты новые фундаментальные законы, которые позволили создать ещё совсем недавно невозможный раздел - «Комбинаторика Длинных Последовательностей» - КДП. Законы КДП позволили оценивать отклонение ДНК структур от структуры идеальной случайной последовательности, что позволяет анализировать ДНК с позиций законов комбинаторики и случайности. Комбинаторная структуризация ДНК позволила резко сократить размеры отображаемой визуальной информации при визуализации структуры ДНК и резко повысить информативную ёмкость отображаемой информации, за счёт введения матричной формы отображения структур КДП в ДНК. В статье на примере анализа мтДНК Amphibians методами КДП сделана попытка ввести чисто математический расчёт близости родственных связей среди тестовой выборки Amphibians.
Linear Optical Random Projections Without Holography
Creators: name: Ohana, Ruben
name: Hesslow, Daniel
name: Brunner, Daniel
name: Gigan, Sylvain
name: Müller, Kilian
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We introduce a novel method to perform linear optical random projections without the need for holography. Our method consists of a computationally trivial combination of multiple intensity measurements to mitigate the information loss usually associated with the absolute-square non-linearity imposed by optical intensity measurements. Both experimental and numerical findings demonstrate that the resulting matrix consists of real-valued, independent, and identically distributed (i.i.d.) Gaussian random entries. Our optical setup is simple and robust, as it does not require interference between two beams. We demonstrate the practical applicability of our method by performing dimensionality reduction on high-dimensional data, a common task in randomized numerical linear algebra with relevant applications in machine learning.
description: 7 pages, 4 figures
Air quality prediction using optimal neural networks with stochastic variables
Creators: name: Russo, Ana
name: Raischel, Frank
name: Lind, Pedro G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: We apply recent methods in stochastic data analysis for discovering a set of few stochastic variables that represent the relevant information on a multivariate stochastic system, used as input for artificial neural networks models for air quality forecast. We show that using these derived variables as input variables for training the neural networks it is possible to significantly reduce the amount of input variables necessary for the neural network model, without considerably changing the predictive power of the model. The reduced set of variables including these derived variables is therefore proposed as optimal variable set for training neural networks models in forecasting geophysical and weather properties. Finally, we briefly discuss other possible applications of such optimized neural network models.
Pulsar timing noise from superfluid turbulence
Creators: name: Melatos, Andrew
name: Link, Bennett
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Shear-driven turbulence in the superfluid interior of a neutron star exerts a fluctuating torque on the rigid crust, causing the rotational phase to walk randomly. The phase fluctuation spectrum is calculated analytically for incompressible Kolmogorov turbulence and is found to be red; the half-power point is set by the observed spin-down rate, the crust-superfluid lag, and the dynamical response time of the superfluid. Preliminary limits are placed on the latter quantities using selected time- and frequency-domain data. It is found that measurements of the normalization and slope of the power spectrum are reproduced for reasonable choices of the turbulence parameters. The results point preferentially to the neutron star interior containing a turbulent superfluid rather than a turbulent Navier-Stokes fluid. The implications for gravitational wave detection by pulsar timing arrays are discussed briefly.
description: 27 pages, 3 figures, accepted for publication in Monthly Notices of the Royal Astronomical Society
The statistical mechanics of random set packing and a generalization of the Karp-Sipser algorithm
Creators: name: Lucibello, Carlo
name: Ricci-Tersenghi, Federico
Publisher: name: arXiv
Year: 2013
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We analyse the asymptotic behaviour of random instances of the Maximum Set Packing (MSP) optimization problem, also known as Maximum Matching or Maximum Strong Independent Set on Hypergraphs. We give an analytical prediction of the MSPs size using the 1RSB cavity method from statistical mechanics of disordered systems. We also propose a heuristic algorithm, a generalization of the celebrated Karp-Sipser one, which allows us to rigorously prove that the replica symmetric cavity method prediction is exact for certain problem ensembles and breaks down when a core survives the leaf removal process. The $e$-phenomena threshold discovered by Karp and Sipser, marking the onset of core emergence and of replica symmetry breaking, is elegantly generalized to $c_s = \frac{e}{d-1}$ for one of the ensembles considered, where $d$ is the size of the sets.
The ALHAMBRA survey: reliable morphological catalogue of 22,051 early- and late-type galaxies
Creators: name: Pović, M.
name: Huertas-Company, M.
name: Aguerri, J. A. L.
name: Márquez, I.
name: Masegosa, J.
name: Husillos, C.
name: Molino, A.
name: Cristóbal-Hornillos, D.
name: Perea, J.
name: Benítez, N.
name: del Olmo, A.
name: Jiménez-Teja, Y.
name: Moles, M.
name: Alfaro, E.
name: Aparicio-Villegas, T.
name: Ascaso, B.
name: Broadhurst, T.
name: Cabrera-Caño, J.
name: Castander, F. J.
name: Cepa, J.
name: Cerviño, M.
name: Lorenzo, M. Fernández
name: Fernández-Soto, A.
name: Delgado, R. M. González
name: Infante, L.
name: López-Sanjuan, C.
name: Martínez, V. J.
name: Matute, I.
name: Oteo, I.
name: Pérez-García, A. M.
name: Prada, F.
name: Quintana, J. M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: ALHAMBRA is a photometric survey designed to trace the cosmic evolution and cosmic variance. It covers a large area of ~ 4 sq. deg in 8 fields, where 7 fields overlap with other surveys, allowing to have complementary data in other wavelengths. All observations were carried out in 20 continuous, medium band (30 nm width) optical and 3 near-infrared (JHK) bands, providing the precise measurements of photometric redshifts. In addition, morphological classification of galaxies is crucial for any kind of galaxy formation and cosmic evolution studies, providing the information about star formation histories, their environment and interactions, internal perturbations, etc. We present a morphological classification of > 40,000 galaxies in the ALHAMBRA survey. We associate to every galaxy a probability to be early-type using the automated Bayesian code galSVM. Despite of the spatial resolution of the ALHAMBRA images (~ 1 arcsec), for 22,051 galaxies we obtained the contamination by other type of less than 10%. Of those, 1,640 and 10,322 galaxies are classified as early- (down to redshifts ~ 0.5) and late-type (down to redshifts ~ 1.0), respectively, with magnitudes F613W < 22.0. In addition, for magnitude range 22.0 < F613W < 23.0 we classified other 10,089 late-type galaxies with redshifts < 1.3. We show that the classified objects populate the expected regions in the colour-mass and colour-magnitude planes. The presented dataset is especially attractive given the homogeneous multi-wavelength coverage available in the ALHAMBRA fields, and is intended to be used in a variety of scientific applications. The low-contamination catalogue (< 10%) is made publicly available with the present paper.
description: Accepted for publication in MNRAS, 19 pages, 14 figures
ДНК - КОМБИНАТОРНОЕ ОБЪЯСНЕНИЕ ЗАПИСИ ИНФОРМАЦИИ, ПРЕОДОЛЕНИЕ ФУНДАМЕНТАЛЬНОГО ПОРОГА СЖАТИЯ
Creators: name: ФИЛАТОВ ОЛЕГ ВЛАДИМИРОВИЧ
Publisher: name: Проблемы современной науки и образования
Year: 2020
Subjects: МТДНК
ДНК
КОМБИНАТОРИКА
КДП
ЦУГА
СОСТАВНОЕ СОБЫТИЕ
MTDNA
DNA
COMBINATORICS
CDP
TRAIN
COMPOUND EVENT

description: В настоящее время происходит объединение знаний о ДНК, полученных разными науками. В статье, с позиций информатики (которая рассматривает ДНК как информационный носитель) и «Комбинаторики длинных последовательностей», приводится объяснение существования двух нитей ДНК как способа достижения большей информационной ёмкости. Анализируя возможные способы записи бинарной информации в ДНК, с позиции комбинаторики длинных последовательностей, было обнаружено, что природная бинарная запись ДНК информации на семнадцать процентов более плотная, чем та которую сейчас обеспечивают современные алгоритмы сжатия информации, то есть природа в ДНК преодолела фундаментальный порог сжатия информации, который присущ современной вычислительной технике. В статье раскрывается способ сверхплотной бинарной записи информации в ДНК с позиций информатики и комбинаторики длинных последовательностей.
HEMANGIOMA CAVERNOSO COSTAL GIGANTE: IMAGENES MACROSCOPICAS
Creators: name: quintero, marcel leonardo
name: rubiano pedroza, jose
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 320226
subject: Surgery

description: Los tumores primarios de la pared torácica representan globalmente el 2% de los tumores, en este grupo se encuentran los hemangiomas, que son clasificados como neoplasias benignas no reactivas con un frecuente número de aparición de vasos normales o anormales, el hemangioma óseo representa aproximadamente el 1% de todas las neoplasias óseas siendo los hematomas costales tumores vasculares benignos extremadamente raros.
The Celestial Buffet: multiple populations and globular cluster formation in dwarf galaxies
Creators: name: Maxwell, Aaron J.
name: Wadsley, James
name: Couchman, H. M. P.
name: Sills, Alison
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a framework that explains the commonly observed variation in light element abundances in globular clusters. If globular clusters form in the centres of dwarf galaxies, they will be pumped onto larger orbits as star formation progresses. The potential well will only retain the moderate velocity AGB ejecta, the expected source of enrichment, but not supernova ejecta. There is no need to increase the initial cluster mass, a requirement of self-enrichment scenarios, as all the stars within the dwarf can contribute. As the clusters move through the dwarf centre they sweep up a mix of AGB ejecta and in-falling pristine gas to form a second generation of stars. The specific mix will vary in time and is thus able to explain the spread in second generation abundances observed in different clusters. The globular clusters will survive to the present day or be stripped as part of the hierarchical merging process of larger galaxies. We illustrate how this process may operate using a high-resolution simulation of a dwarf galaxy at high redshift.
description: 8 pages, 3 figures, accepted for publication in MNRAS
Generalized Kac-Moody Lie algebras, free Lie algebras and the structure of the Monster Lie algebra
Creators: name: Jurisich, Elizabeth
Publisher: name: arXiv
Year: 2013
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: It is shown that any generalized Kac-Moody Lie algebra g that has no mutually orthogonal imaginary simple roots can be written as the vector space direct sum of a Kac-Moody subalgebra and subalgebras isomorphic to free Lie algebras over certain modules for the Kac-Moody subalgebra. Also included is a detailed discussion of Borcherds' construction of the Monster Lie algebra from a vertex algebra and an elementary proof of Borcherds' theorem relating Lie algebras with `an almost positive definite bilinear form' to generalized Kac-Moody algebras. (Preprint version 1996)
description: Preprint version (from 1996) of the published paper
Changing tools, changing habits, changing workflows: Recent evolutions of the interlibrary loan service at ULiege Library
Creators: name: Prosmans, Fabienne
name: Renaville, François
Publisher: name: arXiv
Year: 2023
Subjects: subject: Digital Libraries (cs.DL)
subject: FOS: Computer and information sciences

description: Over the last few years, the interlibrary loan (ILL) service of the University of Liège Library has evolved considerably, both in terms of habits and workflows. In this article, we will explain the main stages of this evolution: (1) first reduction in the number of ILL units (from eight to five) and involved operators (from 15 to 10) within the homemade ILL solution (2015); (2) use of the resource sharing (RS) functionality in the new Alma library management system (2015); (3) second reduction in the number of ILL units (from five to only one) and in involved operators (from 10 to six) (2018); (4) subscription to an international broker ILL system (RapidILL) for electronic and digital materials and its integration with Alma (2020); (5) project of peer-to-peer resource sharing for print materials between Alma instances of university and research libraries in Belgium (2022), and (temporary) free ILL service to all University users (2020-2022). The aim of these changes is to harmonise the practices of ILL operators, reduce the quantity of manual and administrative operations and tasks devoted to ILL and supply materials that do not belong to the library collections in a fairer, faster and more fluid way. While all of these changes have been implemented gradually over the years, not all of them have been deployed in a concerted manner among all stakeholders.
description: 10 pages, with charts and tables
title: Удаленная работа – тренд современной экономики
Creators: name: Кузьменко, В.
name: Чупина, Э.
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2020

description: Статья посвящена рассмотрению быстро развивающегося тренда на удаленную работу. Автором проведено исследование по изучению отношения населения к удалённой работе, рассмотрены причины возникновения тренда и варианты развития ситуации.