cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Dynamical aspects of isotopic scaling
Creators: name: Veselsky, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Investigation of the effect of the dynamical stage of heavy-ion collisions indicates that the increasing width of the initial isospin distributions is reflected by a significant modification of the isoscaling slope for the final isotopic distributions after de-excitation. For narrow initial distributions, the isoscaling slope assumes the limiting value of the two individual initial nuclei while for wide initial isotopic distributions the slope for hot fragments approaches the initial value. The isoscaling slopes for final cold fragments increase due to secondary emissions. The experimentally observed evolution of the isoscaling parameter in multifragmentation of hot quasiprojectiles at E$_{inc}$=50 AMeV, fragmentation of $^{86}$Kr projectiles at E$_{inc}$=25 AMeV and multifragmentation of target spectators at relativistic energies was reproduced by a simulation with the dynamical stage described using the appropriate model (deep inelastic transfer and incomplete fusion at the Fermi energy domain and spectator-participant model at relativistic energies) and the de-excitation stage described with the statistical multifragmentation model. In all cases the isoscaling behavior was reproduced by a proper description of the dynamical stage and no unambiguous signals of the decrease of the symmetry energy coefficient were observed.
description: LaTeX, 18 pages, 9 figures, to appear in Phys. Rev. C
Neutron background measurement for rare event search experiments in the YangYang Underground Laboratory
Creators: name: Yoon, Young Soo
name: Kim, Jungho
name: Park, Hyeonseo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Several experiments have been conducted in the YangYang Underground Laboratory in the Republic of Korea such as the search for dark matter and the search for neutrinoless double-beta decay, which require an extremely low background event rate due to the detector system and the environment. In underground experiments, neutrons have been identified as one of the background sources. The neutron flux in the experimental site needs to be determined to design a proper shielding system and for precise background estimation. We measured the neutron spectrum with a Bonner sphere spectrometer, with Helium-3 ($^{3}$He) proportional counters. The neutron flux at the underground laboratory was so low that the radioactive decays from the radioisotopes contained in the detector created a significant background interference to the neutron measurement. Using Monte Carlo simulations, the intrinsic $α$ background distribution due to the radioactive isotopes in the detector materials, was estimated. The neutron count rate of each Bonner sphere was measured from the pulse height spectrum of the $^{3}$He proportional counter, after subtracting the $α$ particle background. The neutron flux and the energy spectrum were determined using the unfolding technique. The total neutron flux measured was (4.46 $\pm$ 0.66) $\times$ $10^{-5}$ $\rm{cm^{-2} s^{-1}}$, and the thermal and fast neutron flux (in the range 1 to 10 MeV) were (1.44 $\pm$ 0.15) $\times$ 10$^{-5}$ $\rm{cm^{-2} s^{-1}}$ and (0.71 $\pm$ 0.10) $\times$ 10$^{-5}$ $\rm{cm^{-2} s^{-1}}$, respectively.
Gravitating defects of codimension-two
Creators: name: Kofinas, Georgios
name: Tomaras, Theodore
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Thin gravitating defects with conical singularities in higher codimensions and with generalized Israel matching conditions are known to be inconsistent for generic energy-momentum. A way to remove this inconsistency is proposed and is realized for an axially symmetric gravitating codimension-two defect in six dimensional Einstein gravity. By varying with respect to the brane embedding fields, alternative matching conditions are derived, which are generalizations of the Nambu-Goto equations of motion of the defect, consistent with bulk gravity. For a maximally symmetric defect the standard picture is recovered. The four-dimensional perfect fluid cosmology coincides with conventional FRW in the case of radiation, but for dust it has rho^{4/3} instead of rho. A four-dimensional black hole solution is presented having the Schwarzschild form with a short-distance correction r^{-2}.
description: Minor changes, to appear in Classical and Quantum Gravity
Effect of interactions on the localization of a Bose-Einstein condensate in a quasi-periodic lattice
Creators: name: Lye, J. E.
name: Fallani, L.
name: Fort, C.
name: Guarrera, V.
name: Modugno, M.
name: Wiersma, D. S.
name: Inguscio, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The transport properties of a Bose-Einstein condensate in a 1D incommensurate bichromatic lattice are investigated both theoretically and experimentally. We observe a blockage of the center of mass motion with low atom number, and a return of motion when the atom number is increased. Solutions of the Gross-Pitaevskii equation show how the localization due to the quasi-disorder introduced by the incommensurate bichromatic lattice is affected by the interactions.
title: Experimental Investigation of Evaporation of Methanol and n-Pentane on a Submerged Capillary Structure
Creators: name: Margraf, Hendrik
name: Luke, Andreas
Publisher: name: Universität Kassel
Year: 2024
Subjects: subject: Evaporation
subject: Heat transfer
subject: High-flux tubes
subject: Pool boiling
subject: 620
subject: Wärmeübertragung
subject: Wäremerohr
subject: Verdunstung

description: Gefördert im Rahmen des Projekts DEAL
Οικονομική ανάλυση βοοτροφικών μονάδων κρεοπαραγωγικής κατεύθυνσης του νομού Ημαθίας
Creators: name: Καραΐσκου, Μαρία Γρηγορίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Βοοτροφία
Οικονομική αποτελεσματικότητα
Ημαθία
Cattle breeding
Economic efficiency
Imathia

description: Στην παρούσα Διπλωματική εργασία διερευνάται η εφαρμογή της ποσοτικής μεθόδου Data Envelopment Analysis (DEA) στην αξιολόγηση της οικονομικής αποτελεσματικότητας 10 βοοτροφικών εκμεταλλεύσεων κρεοπαραγωγικής κατεύθυνσης για το έτος 2018. Τα πρωτογενή δεδομένα που χρησιμοποιήθηκαν στην ανάλυση συλλέχθηκαν με την χρήση ερωτηματολογίων. Ως εξαρτημένη μεταβλητή χρησιμοποιήθηκε η ακαθάριστη πρόσοδος σε ευρώ, ενώ ως ανεξάρτητες μεταβλητές το κόστος εργασίας, τα πάγια κόστη, τα κόστη παραγωγής και οι ζημίες (εκφρασμένα σε ευρώ). Τα αποτελέσματα έδειξαν ότι για τη βελτίωση της αποτελεσματικότητας των κτηνοτροφικών εκμεταλλεύσεων, οι εισροές πρέπει να μειωθούν κατά 22,8% (VRS) με δεδομένο επίπεδο εκροών, ενώ 6 βοοτροφικές εκμεταλλεύσεις παρουσιάζουν αρίστη τεχνική αποτελεσματικότητα. Ακόμη, όταν στην εξαρτημένη μεταβλητή προστέθηκαν και οι επιδοτήσεις (εκφρασμένες σε ευρώ), με τις ίδιες ανεξάρτητες μεταβλητές, τα αποτελέσματα της οικονομικής αποτελεσματικότητας έδειξαν πως οι εισροές θα πρέπει να μειωθούν κατά μέσο όρο 42,2% ώστε οι εκμεταλλεύσεις να έχουν με τη δεδομένη εκροή το μεγαλύτερο κέρδος. Μόνο μία εκμετάλλευση παρουσίασε άριστη οικονομική αποτελεσματικότητα, αυτή με το μικρότερο αριθμό ζώων και τα ελάχιστα έξοδα παραγωγής
description: This postgraduate thesis investigates the application of the quantitative method of Data Envelopment Analysis (DEA) to the evaluation of the financial viability of 10 bovine farm holdings for 2018. The primary data used in the analysis were collected using questionnaires. The gross income in euro was used as a dependent variable, while labor costs, fixed costs, production costs and losses (expressed in euro) were used as independent variables. The results showed that in order to improve the efficiency of the livestock farms, the inputs had to be reduced by 22.8% (VRS) at a given outlet level, while 6 farms had excellent technical efficiency. Moreover, when subsidies (expressed in euro) were added to the dependent variable with the same independent variables, the results of economic efficiency showed that inputs would have to be reduced by an average of 42.2% in order the farms with the stable output, have the biggest profit. Only one farm had excellent economic efficiency, this was the farm with the lowest number of animals and with minimal production costs
A new symmetry-based extraction method of Schottky diode parameters from resistance-compensated I-V characteristics
Creators: name: Ocaya, Richard Opio
name: Yakuphanoglu, Fahrettin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a novel resistance-compensated I-V method to extract the series resistance, ideality factor, barrier height and built-in potential of a metal-semiconductor diode. We show that a reduced equation arises from a unique but hitherto unreported symmetry in the Schottky equation when it is written as an ordinary differential equation. In spite of the intense mathematical justification, we show how this new equation is directly applicable to an empirical data set through a simple algorithm. We test the method on a new Al/p-Si/Bi$_2$Se$_3$/Al Schottky diode and compare it with the Cheung-Cheung method on the same data. The series resistance was found to change exponentially with applied bias with a rate constant that depends on the incident illumination. The barrier height decreased with bias but was independent of the incident illumination. The trends in the results of the method agree strongly with the literature and may yield more accurate diode parameters compared to other electrical methods.
description: 32 pages, 11 figures in 7 graphics
On fault coverage and fault simulation for multiple signature analysis BIST schemes
Creators: name: Zhang, Chun
Publisher: name: University of British Columbia
Year: 2008

description: Fault coverage and fault simulation issues related to multiple signature analysis (MSA) built-in self-test (BIST) schemes are treated here. A model to predict the fault coverage is presented. Based on this model, the nature of the fault coverage for MSA is discussed. The fault coverage of MSA is a function of both the signature sizes and the schedulings. The problem of optimal signature scheduling in MSA to minimize fault simulation time is discussed. Using the developed model, for an arbitrary circuit under test (CUT), given the optimal scheduling positions, given the fault coverage data before data compaction, and given an aliasing threshold, the optimal MSA for the CUT can be readily designed in terms of signature sizes and number of signatures. Analysis and experimental results are presented.
Multiparticle production in the Glasma at NLO and plasma instabilities
Creators: name: Venugopalan, Raju
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss the relation between multi-particle production in the Glasma at next-to-leading order and the physics of plasma instabilities.
description: 4 pages, talk at Quark Matter 2006
Χιούμορ και μελαγχολία στο έργο τριών πεζογράφων της δεύτερης μεταπολεμικής γενιάς: Χάκκας – Καζαντζής – Μάρκογλου
Creators: name: Ζέρβου, Ελένη Αλέξανδρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: χιούμορ
μελαγχολία
Μάριος Χάκκας
Τόλης Καζαντζής
Πρόδρομος Μάρκογλου
humour
melancholy
Marios Chakkas
Tolis Kazantzis
Prodromos Markoglou

description: Η παρούσα διπλωματική εργασία εξετάζει το έργο τριών πεζογράφων της δεύτερης μεταπολεμικής γενιάς, του Μάριου Χάκκα, του Τόλη Καζαντζή και του Πρόδρομου Μάρκογλου, μέσα από το πρίσμα του παραπληρωματικού ζεύγους «χιούμορ – μελαγχολία». Αρχικά, στο πρώτο κεφάλαιο σκιαγραφούμε το γραμματολογικό πλαίσιο στο οποίο εντάσσονται οι παραπάνω συγγραφείς επιχειρώντας μια σύντομη επισκόπηση στα ιστορικά συμφραζόμενα της μεταπολεμικής ελληνικής λογοτεχνίας, καθώς και μια θεωρητική προσέγγιση των εννοιών της μνήμης, του τραύματος, των μικροαφηγήσεων, του χιούμορ και της μελαγχολίας. Στη συνέχεια, προσεγγίζουμε το έργο τους με άξονες, αφενός μια μελαγχολική μνήμη, και αφετέρου τη χιουμοριστική εκτροπή της. Έτσι, στο δεύτερο κεφάλαιο διερευνούμε τη λειτουργία της μνήμης ως αφετηρίας μιας αφήγησης μελαγχολικής, που αδυνατεί να υπερκεράσει τις τραυματικές εμπειρίες του παρελθόντος και να συμφιλιωθεί με ένα απωθητικό παρόν. Και, τέλος, στο τρίτο κεφάλαιο εξετάζουμε χιουμοριστικές εκφάνσεις αυτής της αφήγησης, από την ήπια ειρωνεία μέχρι τη σάτιρα και τον αυτοσαρκασμό, σε συνάρτηση με τη στόχευση που κάθε φορά υπηρετείται και που δεν είναι άλλη από την κοινωνικοπολιτική πραγματικότητα που διαμορφώνεται στη μετεμφυλιακή ελληνική κοινωνία
description: This M.A. dissertation examines the literary work of three second-generation post-war authors, namely Marios Chakkas, Tolis Kazantzis and Prodromos Markoglou, through the prism of the alternating ‘humour-melancholy’ motif. In the first chapter we delineate the grammatological genre which the aforementioned authors belong to, in an attempt to first, briefly provide historical context for the post-war Greek literature, and second, to employ a theoretical approach of key concepts, including memory, trauma, episodes, humour and melancholy. Afterwards, we study how an initially melancholic memory appears to be ultimately diverted in a humorous fashion. In the second chapter we explore the function of memory as a trigger of a melancholic narration that fails to overcome the traumatic experiences of the past and to reconcile with the repulsive present. Lastly, in the third chapter we investigate the humorous expressions of such narrations, ranging from mild irony to satire and self-sarcasm, within the context of the ultimate goal of these literary works: to present and criticise the contemporary socio-political situation of the post-civil-war Greek society
Enhanced coherence of all-nitride superconducting qubits epitaxially grown on silicon substrate
Creators: name: Kim, Sunmi
name: Terai, Hirotaka
name: Yamashita, Taro
name: Qiu, Wei
name: Fuse, Tomoko
name: Yoshihara, Fumiki
name: Ashhab, Sahel
name: Inomata, Kunihiro
name: Semba, Kouichi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Improving the coherence of superconducting qubits is a fundamental step towards the realization of fault-tolerant quantum computation. However, coherence times of quantum circuits made from conventional aluminium-based Josephson junctions are limited by the presence of microscopic two-level systems in the amorphous aluminum oxide tunnel barriers. Here, we have developed superconducting qubits based on NbN/AlN/NbN epitaxial Josephson junctions on silicon substrates which promise to overcome the drawbacks of qubits based on Al/AlO$_{x}$/Al junctions. The all-nitride qubits have great advantages such as chemical stability against oxidation, resulting in fewer two-level fluctuators, feasibility for epitaxial tunnel barriers that reduce energy relaxation and dephasing, and a larger superconducting gap of $\sim$5.2 meV for NbN, compared to $\sim$0.3 meV for aluminium, which suppresses the excitation of quasiparticles. By replacing conventional MgO by a silicon substrate with a TiN buffer layer for epitaxial growth of nitride junctions, we demonstrate a qubit energy relaxation time $T$$_{1}$=16.3 $μ$s and a spin-echo dephasing time $T$$_{2}$=21.5 $μ$s. These significant improvements in quantum coherence are explained by the reduced dielectric loss compared to previously reported NbN-based qubits with MgO substrates ($T$$_{1}$$\approx$$T$$_{2}$$\approx$0.5 $μ$s). These results are an important step towards constructing a new platform for superconducting quantum hardware.
description: 22 pages, 4 figures
On the asymptotic joint distribution of sample space--time covariance estimators
Creators: name: Li, Bo
name: Genton, Marc G.
name: Sherman, Michael
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: We study the asymptotic joint distribution of sample space--time covariance estimators of strictly stationary random fields. We do this without any marginal or joint distributional assumptions other than mild moment and mixing conditions. We consider several situations depending on whether the observations are regularly or irregularly spaced and whether one part or the whole domain of interest is fixed or increasing. A simulation experiment illustrates the theoretical results.
description: Published in at http://dx.doi.org/10.3150/07-BEJ6196 the Bernoulli (http://isi.cbs.nl/bernoulli/) by the International Statistical Institute/Bernoulli Society (http://isi.cbs.nl/BS/bshome.htm)
BOSHLANGʻICH SINF OʻQUVCHILARINING IJODIY  QOBILIYATLARINI RIVOJLANTIRISHDA INNOVATSION  TEXNOLOGIYALARDAN FOYDALANISH
Creators: name: Niyazmetova Nargiza , Jurayeva Shaxlo , Xidirova Iroda
Publisher: name: Zenodo
Year: 2024

description: Annotatsiya: maqolada kichik maktab o’quvchilarining ijodiy qobiliyatlarini rivojlantirish va innovatsion o’yin texnologiyalaridan foydalanish mazmuni yoritilgan.

Annotation: the article describes the development of creative abilities of junior schoolchildren and the use of innovative game technologies.

Kalit so'zlar: Boshlang'ich ta'lim, metodlar, dars, interfaol, klaster, qora quti, videotopishmoq, juft barmoqchalar, beshinchi(oltinchisi, yettinchisi…) ortiqcha.

Key words: Elementary education, methods, lesson, interactive, cluster, black box, video puzzle, pair of fingers, fifth (sixth, seventh...) plus.
Quantum Parametric Oscillator Heat Engines in Squeezed Thermal Baths: Foundational Theoretical Issues
Creators: name: Arısoy, Onat
name: Hsiang, Jen-Tsung
name: Hu, Bei-Lok
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we examine some foundational issues of a class of quantum engines where the system consists of a single quantum parametric oscillator, operating in an Otto cycle consisting of 4 stages of two alternating phases: the isentropic phase is detached from any bath (thus a closed system) where the natural frequency of the oscillator is changed from one value to another, and the isothermal phase where the system (now rendered open) is put in contact with one or two squeezed baths of different temperatures, whose nonequilibrium dynamics follows the Hu-Paz-Zhang (HPZ) master equation for quantum Brownian motion. The HPZ equation is an exact nonMarkovian equation which preserves the positivity of the density operator and is valid for a) all temperatures, b) arbitrary spectral density of the bath, and c) arbitrary coupling strength between the system and the bath. Taking advantage of these properties we examine some key foundational issues of theories of quantum open and squeezed systems for these two phases of the quantum Otto engines. This include, i) the nonMarkovian regimes for non-Ohmic, low temperature baths, ii) what to expect in nonadiabatic frequency modulations, iii) strong system-bath coupling, as well as iv) the proper junction conditions between these two phases. Our aim here is not to present ways for attaining higher efficiency but to build a more solid theoretical foundation for quantum engines of continuous variables covering a broader range of parameter spaces hopefully of use for exploring such possibilities.
description: 33 pages, 2 figures
Bottlenecks in Blockchain Consensus Protocols
Creators: name: Alqahtani, Salem
name: Demirbas, Murat
Publisher: name: arXiv
Year: 2021
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Most of the Blockchain permissioned systems employ Byzantine fault-tolerance (BFT) consensus protocols to ensure that honest validators agree on the order for appending entries to their ledgers. In this paper, we study the performance and the scalability of prominent consensus protocols, namely PBFT, Tendermint, HotStuff, and Streamlet, both analytically via load formulas and practically via implementation and evaluation. Under identical conditions, we identify the bottlenecks of these consensus protocols and show that these protocols do not scale well as the number of validators increases. Our investigation points to the communication complexity as the culprit. Even when there is enough network bandwidth, the CPU cost of serialization and deserialization of the messages limits the throughput and increases the latency of the protocols. To alleviate the bottlenecks, the most useful techniques include reducing the communication complexity, rotating the hotspot of communications, and pipelining across consensus instances.
description: 8 pages
Beam-Based Alignment of the NuMI Target Station Components at FNAL
Creators: name: Zwaska, R.
name: Bishai, M.
name: Childress, S.
name: Drake, G.
name: Escobar, C.
name: Gouffon, P.
name: Harris, D. A.
name: Hylen, J.
name: Indurthy, D.
name: Koizumi, G.
name: Kopp, S.
name: Lucas, P.
name: Marchionni, A.
name: Para, A.
name: Pavlovic, Z.
name: Smart, W.
name: Talaga, R.
name: Viren, B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The Neutrinos at the Main Injector (NuMI) facility is a conventional horn-focused neutrino beam which produces muon neutrinos from a beam of mesons directed into a long evacuated decay volume. The relative alignment of the primary proton beam, target, and focusing horns affects the neutrino energy spectrum delivered to experiments. This paper describes a check of the alignment of these components using the proton beam.
description: higher resolution figures available on Fermilab Preprint Server (see SPIRES entry), accepted for publication in Nucl. Instr. and Meth. A
Model for l/f Flux Noise in SQUIDs and Qubits
Creators: name: Koch, Roger H.
name: DiVincenzo, David P.
name: Clarke, John
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a model for 1/f flux noise in superconducting devices (f is frequency). The noise is generated by the magnetic moments of electrons in defect states which they occupy for a wide distribution of times before escaping. A trapped electron occupies one of the two Kramers-degenerate ground states, between which the transition rate is negligible at low temperature. As a result, the magnetic moment orientation is locked. Simulations of the noise produced by randomly oriented defects with a density of 5*10^17 m^-2 yield 1/f noise magnitudes in good agreement with experiments.
description: 16 pages, 4 figures; v2: Various minor changes. Physical Review Letters, in press
Numerical instabilities in power system transient simulations
Creators: name: Araújo, António E. A.
Publisher: name: University of British Columbia
Year: 2008

description: In power system simulations, control systems act upon the electric power system in a variety of ways. There is, therefore, a necessity of simulating the control system equations together with the power system equations. This is the case not only instability studies, but also in the simulation of electromagnetic transient phenomena. Because of the different structure of the two sets of equations, computational efficiency can be improved if both sets of equations are solved separately, with the result from one set of equations showing up in the other set of equations one or more time steps later. This procedure, however efficient, can lead to numerical instability. In the simulation of the control system itself, the modelling of nonlinearities in closed loops poses some problems as well. The most efficient way of handling a nonlinear block is to open the closed loop and use, instead of the current value of the variable, a predicted value of the feedback path. This can also lead to numerical instabilities. In this thesis a simultaneous solution of the control and power system equations is proposed. For the cases of nonlinearities in closed loops, an iterative solution is suggested. The implementation of the method is carried out in the Electromagnetic Transients Program (EMTP). Several comparisons between the proposed and other methods are performed. Incases in which the analytical solution is not available, the comparison is made against the results of the TAGS package ("Transient Analysis of Control Systems") which is integrated with the EMTP version of DCG/EPRI ("Development Coordination Group/Electric Power Research Institute"). It is shown through simple, but typical, case studies that the proposed method is not only accurate and efficient, but also numerically stable, thus representing a significant improvement to the ability of the EMTP to reliably simulate electromagnetic transients in power systems when control systems are involved.
Efficient verification of entangled continuous-variable quantum states with local measurements
Creators: name: Liu, Ye-Chao
name: Shang, Jiangwei
name: Zhang, Xiangdong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Continuous-variable quantum states are of particular importance in various quantum information processing tasks including quantum communication and quantum sensing. However, a bottleneck has emerged with the fast increasing in size of the quantum systems which severely hinders their efficient characterization. In this work, we establish a systematic framework for verifying entangled continuous-variable quantum states by employing local measurements only. Our protocol is able to achieve the unconditionally high verification efficiency which is quadratically better than quantum tomography as well as other nontomographic methods. Specifically, we demonstrate the power of our protocol by showing the efficient verification of entangled two-mode and multimode coherent states with local measurements.
description: 7+11 pages, 2 figures, close to the published version
Postprandial morphological response of the intestinal epithelium of the Burmese python (Python molurus)
Creators: name: Lignot, Jean-Hervé
name: Helmstetter, Cécile
name: Secor, Stephen M
Publisher: name: arXiv
Year: 2006
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: The postprandial morphological changes of the intestinal epithelium of Burmese pythons were examined using fasting pythons and at eight time points after feeding. In fasting pythons, tightly packed enterocytes possess very short microvilli and are arranged in a pseudostratified fashion. Enterocyte width increases by 23% within 24 h postfeeding, inducing significant increases in villus length and intestinal mass. By 6 days postfeeding, enterocyte volume had peaked, following as much as an 80% increase. Contributing to enterocyte hypertrophy is the cellular accumulation of lipid droplets at the tips and edges of the villi of the proximal and middle small intestine, but which were absent in the distal small intestine. At 3 days postfeeding, conventional and environmental scanning electron microscopy revealed cracks and lipid extrusion along the narrow edges of the villi and at the villus tips. Transmission electron microscopy demonstrated the rapid postprandial lengthening of enterocyte microvilli, increasing 4.8-fold in length within 24 h, and the maintaining of that length through digestion. Beginning at 24 h postfeeding, spherical particles were found embedded apically within enterocytes of the proximal and middle small intestine. These particles possessed an annular-like construction and were stained with the calcium-stain Alizarine red S suggesting that they were bone in origin. Following the completion of digestion, many of the postprandial responses were reversed, as observed by the atrophy of enterocytes, the shortening of villi, and the retraction of the microvilli. Further exploration of the python intestine will reveal the underlying mechanisms of these trophic responses and the origin and fate of the engulfed particles.
Chiral charge transfer along magnetic field lines in a Weyl superconductor
Creators: name: Lemut, G.
name: Pacholski, M. J.
name: Beenakker, C. W. J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We identify a signature of chirality in the electrical conduction along magnetic vortices in a Weyl superconductor: The conductance depends on whether the magnetic field is parallel or antiparallel to the vector in the Brillouin zone that separates Weyl points of opposite chirality.
description: 7 pages, 4 figures
About Substitution Tilings with Statistical Circular Symmetry
Creators: name: Frettlöh, Dirk
Publisher: name: arXiv
Year: 2008
Subjects: subject: Spectral Theory (math.SP)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 46F12, 78A45, 52C23

description: Two results about equidistribution of tile orientations in primitive substitution tilings are stated, one for finitely many, one for infinitely many orientations. Furthermore, consequences for the associated diffraction spectra and the dynamical systems are discussed.
description: 7 pages, 2 figures
Data Sharing and PIDs: Ongoing Dialogues in the Global Community
Creators: name: Sulaiman, Madiareni
Publisher: name: Zenodo
Year: 2024
Subjects: data sharing
persistent identifiers
PIDs

description: Panel 1: The current state of open data and the role of libraries:

This panel session will consider the context for open data including creating data sharing cultures, and understanding and overcoming resistance to data sharing and data publication. While policy matters, training, incentives, and sustainable infrastructures are essential. This session will draw on the role of libraries in creating environments for data sharing, publication, and reuse, and how these roles interact with other stakeholders. Participants will leave this session with a practical understanding of examples from different libraries that have been successful and how they can apply these to their own context.

 

Morning short talks 

Ginny Barbour, Editor-in-Chief, Medical Journal of Australia  – open data, indigenous data and and journals

Lilly Ho, Manager Information Services, Northern Territory Geological Survey, Australia – data strategy for open geoscience

Elisabet Rundqvist, Special Advisor, National Library of Sweden – National guidelines for open science

Madiareni Sulaiman, National Research and Innovation Agency (BRIN Indonesia) and PhD Student University College London, Indonesia/United Kingdom – data sharing and PIDs
Political Warfare: The Applied Case of Serbia and Croatia
Creators: name: Dragan, Vitorovic Milenko
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Ο πολιτικός πόλεμος
Aλληλεξάρτηση
Γιουγκοσλαβία
Political warfare
Ιnterdependence
Yugoslavia

description: States compete with each other. Although the direct military clash remains a distant possibility, states steadily increase their military spending and deploy alternative means of warfare, relying on financial, psychological and intellectual capabilities. Political warfare, a comprehensive strategy widely adopted, discards the plain use of force, because of complex interdependence between the states. This specific strategic approach mobilizes the broad societal and technological resources and does not have easily observable destructive capabilities like classical warfare. However, political warfare changes societies both from inside and from outside. In order to wage political warfare, states manipulate the hearts and minds of the opponent, through propaganda, identity reengineering, and geopolitical narratives. The Republic of Serbia and the Republic of Croatia are in political warfare for a long time, continuously competing for recognition and power.
description: Tα κράτη ανταγωνίζονται μεταξύ τους. Αν και η άμεση στρατιωτική σύγκρουση παραμένει μια μακρινή πιθανότητα, τα κράτη αναμένεται να αυξήσουν σταθερά τις στρατιωτικές τους δαπάνες και να αναπτύξουν εναλλακτικούς τρόπους πολέμου, βασιζόμενα σε οικονομικές, ψυχολογικές και πνευματικές ικανότητες. Ο πολιτικός πόλεμος, μια σφαιρική στρατηγική που υιοθετείται ευρέως, απορρίπτει την απλή χρήση βίας, λόγω της πολύπλοκης αλληλεξάρτησης μεταξύ των κρατών. Αυτή η συγκεκριμένη στρατηγική προσέγγιση κινητοποιεί τους ευρύτερους κοινωνικούς και τεχνολογικούς πόρους και δεν έχει εύκολα παρατηρήσιμες καταστρεπτικές δυνατότητες, όπως ο κλασικός πόλεμος. Ωστόσο, ο πολιτικός πόλεμος αλλάζει κοινωνίες τόσο εσωτερικά όσο και εξωτερικά. Προκειμένου να διεξάγουν πολιτικό πόλεμο, τα κράτη χειραγωγούν την καρδιά και το μυαλό του αντιπάλου, μέσω της προπαγάνδας, της αναδιοργάνωσης της ταυτότητας και των γεωπολιτικών αφηγήσεων. Η Δημοκρατία της Σερβίας και η Δημοκρατία της Κροατίας βρίσκονται σε πολιτικό πόλεμο για μεγάλο χρονικό διάστημα, ανταγωνιζόμενες συνεχώς για αναγνώριση και εξουσία.
Singular limits for 4-dimensional semilinear elliptic problems with exponential nonlinearity
Creators: name: Baraket, Sami
name: Dammak, Makkia
name: Ouni, Taieb
name: Pacard, Frank
Publisher: name: arXiv
Year: 2006
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 35J60, 53C21, 58J05

description: Using some nonlinear domain decomposition method, we prove the existence of singular limits for solution of semilinear elliptic problems with exponential nonlinearity.
description: 29 pages
Continuous Real-Time Sensing with a Nitrogen Vacancy Center via Coherent Population Trapping
Creators: name: Wu, Shu-Hao
name: Turner, Ethan
name: Wang, Hailin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We propose and theoretically analyze the use of coherent population trapping of a single diamond nitrogen vacancy (NV) center for continuous real-time sensing. The formation of the dark state in coherent population trapping prevents optical emissions from the NV center. Fluctuating magnetic fields, however, can kick the NV center out of the dark state, leading to a sequence of single-photon emissions. A time series of the photon counts detected can be used for magnetic field estimations, even when the average photon count per update time interval is much smaller than 1. For a theoretical demonstration, the nuclear spin bath in a diamond lattice is used as a model fluctuating magnetic environment. For fluctuations with known statistical properties, such as an Ornstein-Uhlenbeck process, Bayesian inference-based estimators can lead to an estimation variance that approaches the classical Cramer-Rao lower bound and can provide dynamical information on a timescale that is comparable to the inverse of the average photon counting rate. Real-time sensing using coherent population trapping adds a new and powerful tool to the emerging technology of quantum sensing.
Multi-site campaign on the open cluster M67. I. Observations and photometric reductions
Creators: name: Stello, D.
name: Arentoft, T.
name: Bedding, T. R.
name: Bouzid, M. Y.
name: Bruntt, H.
name: Csubry, Z.
name: Dind, Z. E.
name: Frandsen, S.
name: Gilliland, R. L.
name: Jacob, A. P.
name: Jensen, H. R.
name: Kang, Y. B.
name: Kim, S. -L.
name: Kiss, L. L.
name: Kjeldsen, H.
name: Koo, J. -R.
name: Lee, J. -A.
name: Lee, C. -U.
name: Nuspl, J.
name: Sterken, C.
name: Szabo, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on an ambitious multi-site campaign aimed at detecting stellar variability, particularly solar-like oscillations, in the red giant stars in the open cluster M67 (NGC 2682). During the six-week observing run, which comprised 164 telescope nights, we used nine 0.6-m to 2.1-m class telescopes located around the world to obtain uninterrupted time-series photometry. We outline here the data acquisition and reduction, with emphasis on the optimisation of the signal-to-noise of the low amplitude (50-500 micromag) solar-like oscillations. This includes a new and efficient method for obtaining the linearity profile of the CCD response at ultra high precision (~10 parts per million). The noise in the final time series is 0.50 mmag per minute integration for the best site, while the noise in the Fourier spectrum of all sites combined is 20 micromag. In addition to the red giant stars, this data set proves to be very valuable for studying high-amplitude variable stars such as eclipsing binaries, W UMa systems and delta Scuti stars.
description: 12 pages, 13 figures, accepted by MNRAS
The Robin problem on rectangles
Creators: name: Rudnick, Zeév
name: Wigman, Igor
Publisher: name: arXiv
Year: 2021
Subjects: subject: Spectral Theory (math.SP)
subject: Analysis of PDEs (math.AP)
subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: We study the statistics and the arithmetic properties of the Robin spectrum of a rectangle. A number of results are obtained for the multiplicities in the spectrum, depending on the Diophantine nature of the aspect ratio. In particular, it is shown that for the square, unlike the case of Neumann eigenvalues where there are unbounded multiplicities of arithmetic origin, there are no multiplicities in the Robin spectrum for sufficiently small (but nonzero) Robin parameter except a systematic symmetry. In addition, uniform lower and upper bounds are established for the Robin-Neumann gaps in terms of their limiting mean spacing. Finally, that the pair correlation function of the Robin spectrum on a Diophantine rectangle is shown to be Poissonian.
description: 3 figures. Arguments in section 2 simplified thanks to a referee. Accepted for publication in the Journal of Mathematical Physics, special collection of papers honoring Freeman Dyson
The double Compton emissivity in a mildly relativistic thermal plasma within the soft photon limit
Creators: name: Chluba, J.
name: Sazonov, S. Yu.
name: Sunyaev, R. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We provide simple and accurate analytic approximations for the low frequency double Compton emission coefficient that are applicable in a broad range of physical situations up to mildly relativistic temperatures. These approximations may be useful for checking in which circumstances the double Compton process is important. We perform series expansions of the double Compton emission integral for low energies of the incident photon and electron and compare the derived analytic expressions with the results obtained by numerical integrations of the full double Compton cross section. We explicitly derived analytic approximations to the low frequency double Compton emission coefficient for initial monochromatic photons and Wien spectra. We show that combining the analytic approximations given in this paper, an accuracy of better than 5% over a very broad range of temperatures and under various physical conditions can be achieved. The double Compton emissivity strongly depends on the ratio of the incoming photon and electron energies: for hard photons and cold electrons the emission is strongly suppressed compared to the case of similar photon and electron energy, whereas in the opposite situation, i.e. hot electrons and soft initial photons, the emission is enhanced. For photons and electrons close to thermodynamic equilibrium the double Compton emissivity increases less rapidly with temperature than in the Lightman-Thorne approximation and the corrections exceed ~10% for temperatures above 4 keV.
description: 12 pages, 8 figures, accepted version
A fault-tolerant building block for transputer networks for real-time processing
Creators: name: Fei, Yueying
Publisher: name: University of British Columbia
Year: 2008

description: Software Implementation of Multi-Processor Fault Tolerance for Real-Time processing is addressed in this thesis with the research focused on: • Fault-Tolerant cells as building blocks that can survive concurrent transient physical faults and permanent failures in large parallel processing systems with potential for real-time processing. • Efficient group communications for redundant data exchanges through multiple communication links that connect the group peers. • Transparent fault-tolerance. • On-Line Forward Fault-Repair using the live execution image from the non-faulty peer with a bounded delay. By systematically connecting the redundant processing modules, the architecture offers regularity and recursiveness which can be used as building blocks for construction of fault-tolerant parallel machines. The communication service protocols take advantage of redundant linkages to ensure reliable and efficient message deliveries among the fault-tolerant abstract transputer peer nodes through the concept of activity observation. The multiple redundant linkages provide a means for parallel communications. This is essential for redundant information exchanges in fault-tolerance. The activity observation concept further reduces the effort for reliable message delivery and simplifies the system design. As a result, messages are dynamically and optimally routed when link failure or processor failure occurs. Through the group communication mechanism underlying the platform, application processes on each FTAT peer node are transparent to details that they are replicated, repaired upon fault detections, and reintegrated after fault repair. Based on a dynamic Triple Modular Redundancy scheme, each application process can survive up to two concurrent faults under the assumption that the probability of two faulty peer applications having the same fault is very small. In a large interconnected network, the cost of fault-tolerance can be very expensive in terms of time and communication due to the cost of either synchronization or rollback recovery. The use of redundant live execution images to repair the faulty module guarantees forward fault recoveries.
Drama in education techniques in EFL classes for students with disability
Creators: name: Σιδηροπούλου, Φωτεινή Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Αγγλικά ως ξένη γλώσσα
Εκπαιδευτικό δράμα
Τεχνικές εκπαιδευτικού δράματος
Αναπηρία
Σύνδρομο Ντάουν
Σύνδρομο Άσπεργκερ
Εκμάθηση ξένης γλώσσας
Κοινωνικές δεξιότητες
EFL
Drama education
Drama techniques
Disability
Down syndrome
Asperger’s syndrome
Foreign language learning
Social skills

description: Η παρούσα μεταπτυχιακή εργασία διερευνά τον τρόπο επίδρασης των τεχνικών εκπαιδευτικού δράματος στη βελτίωση των γλωσσικών και κοινωνικών δεξιοτήτων των μαθητών με διανοητική αναπηρία στο πλαίσιο διδασκαλίας της Αγγλικής ως ξένης γλώσσας. Με βάση τους παραπάνω στόχους πραγματοποιήθηκε ποιοτική έρευνα, η οποία περιλάμβανε τις εξής δύο μελέτες περίπτωσης μαθητών: α) μια γυναίκα είκοσι επτά ετών με σύνδρομο Ντάουν, β) έναν άνδρα είκοσι έξι ετών με σύνδρομο Άσπεργκερ. Η έρευνα διεξήχθη στο Κέντρο Αποκατάστασης και Δημιουργικής Απασχόλησης Ατόμων με Αναπηρία «Σωτήρ» στη Θεσσαλονίκη το χρονικό διάστημα μεταξύ Απριλίου και Μαΐου 2019. Η ερευνήτρια πραγματοποίησε τέσσερα σαρανταπεντάλεπτα μαθήματα χωρίς τη χρήση τεχνικών εκπαιδευτικού δράματος και τέσσερα σαρανταπεντάλεπτα μαθήματα κάνοντας χρήση τεχνικών εκπαιδευτικού δράματος, ώστε να μπορεί να προχωρήσει σε σύγκριση των εκπαιδευτικών αποτελεσμάτων. Με βάση την ποιοτική ανάλυση των ερευνητικών δεδομένων φαίνεται ότι οι τεχνικές εκπαιδευτικού δράματος μπορούν να ενισχύσουν τους μαθητές με σύνδρομο Ντάουν και με σύνδρομο Άσπεργκερ, ώστε να βελτιώσουν τις γλωσσικές και τις κοινωνικές τους δεξιότητες. Η συγκεκριμένη έρευνα μπορεί να αποτελέσει βάση για τη διεξαγωγή αντίστοιχων ερευνών στο μέλλον, αναφορικά με τη χρήση τεχνικών εκπαιδευτικού δράματος στη διδασκαλία της Αγγλικής ως ξένης γλώσσας σε μαθητές με αναπηρία
description: This dissertation explores the impact of drama techniques as means to promote language learning and the social skills of students with cognitive disability when incorporated in an EFL classroom. In order to investigate that, a qualitative research with two single case studies was conducted on a 27-year-old woman with Down syndrome and a 26-year-old man with Asperger’s syndrome. The study had a total duration of 1.5 months and took place in Sotiras, a rehabilitation and creative engagement center for people with various disabilities located in Thessaloniki during April and May 2019. Two cycles of lessons, with four 45-minute lessons each were created to test the hypotheses: the first cycle did not include drama techniques to serve as a basis for comparison, while the second cycle did. The findings indicate that drama techniques can benefit students with Down and Asperger’s syndrome promote both their language learning and their social skills. Future research should be conducted using this study as basis to further investigate this issue in order to shed more light on how to better incorporate drama techniques in an EFL classroom with students who have disabilities
Quantum coherent microwave-optical transduction using high overtone bulk acoustic resonances
Creators: name: Blésin, Terence
name: Tian, Hao
name: Bhave, Sunil
name: Kippenberg, Tobias J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A device capable of converting single quanta of the microwave field to the optical domain is an outstanding endeavour in the context of quantum interconnects between distant superconducting qubits, but likewise can have applications in other fields, such as radio astronomy or, in the classical realm, microwave photonics. A variety of transduction approaches, based on optomechanical or electro-optical interactions, have been proposed and realized, yet the required vanishing added noises and an efficiency approaching unity, have not yet been attained. Here we present a new transduction scheme that could in theory satisfy the requirements for quantum coherent bidirectional transduction. Our scheme relies on an intermediary mechanical mode, a high overtone bulk acoustic resonance (HBAR), to coherently couple microwave and optical photons through the piezoelectric and strain-optical effects. Its efficiency results from the combination of integrated Si3N4 photonic circuits with ultra low loss sustaining high intracavity photon numbers with the highly efficient microwave to mechanical transduction offered by piezoelectrically coupled HBAR. We develop a quantum theory for this multipartite system by first introducing a quantization method for the piezoelectric interaction between the microwave mode and the mechanical mode from first principles (which to our knowledge has not been presented in this form), and link the latter to the conventional Butterworth-Van Dyke model. The HBAR is subsequently coupled to a pair of hybridized optical modes from coupled optical ring cavities via the strain-optical effect. We analyze the conversion capabilities of the proposed device using signal flow graphs, and demonstrate that near quantum coherent transduction is possible, with realistic experimental parameters.
description: 18 pages, 5 figures, 2 tables,submitted to PRX Quantum