cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Projective Ring Line Encompassing Two-Qubits
Creators: name: Saniga, Metod
name: Planat, Michel
name: Pracna, Petr
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The projective line over the (non-commutative) ring of two-by-two matrices with coefficients in GF(2) is found to fully accommodate the algebra of 15 operators - generalized Pauli matrices - characterizing two-qubit systems. The relevant sub-configuration consists of 15 points each of which is either simultaneously distant or simultaneously neighbor to (any) two given distant points of the line. The operators can be identified with the points in such a one-to-one manner that their commutation relations are exactly reproduced by the underlying geometry of the points, with the ring geometrical notions of neighbor/distant answering, respectively, to the operational ones of commuting/non-commuting. This remarkable configuration can be viewed in two principally different ways accounting, respectively, for the basic 9+6 and 10+5 factorizations of the algebra of the observables. First, as a disjoint union of the projective line over GF(2) x GF(2) (the "Mermin" part) and two lines over GF(4) passing through the two selected points, the latter omitted. Second, as the generalized quadrangle of order two, with its ovoids and/or spreads standing for (maximum) sets of five mutually non-commuting operators and/or groups of five maximally commuting subsets of three operators each. These findings open up rather unexpected vistas for an algebraic geometrical modelling of finite-dimensional quantum systems and give their numerous applications a wholly new perspective.
description: 8 pages, three tables; Version 2 - a few typos and one discrepancy corrected; Version 3: substantial extension of the paper - two-qubits are generalized quadrangles of order two; Version 4: self-dual picture completed; Version 5: intriguing triality found -- three kinds of geometric hyperplanes within GQ and three distinguished subsets of Pauli operators
Impact of Massive Binary Star and Cosmic Evolution on Gravitational Wave Observations I: Black Hole-Neutron Star Mergers
Creators: name: Broekgaarden, Floor S.
name: Berger, Edo
name: Neijssel, Coenraad J.
name: Vigna-Gómez, Alejandro
name: Chattopadhyay, Debatri
name: Stevenson, Simon
name: Chruslinska, Martyna
name: Justham, Stephen
name: de Mink, Selma E.
name: Mandel, Ilya
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Mergers of black hole-neutron star (BHNS) binaries have now been observed by GW detectors with the recent announcement of GW200105 and GW200115. Such observations not only provide confirmation that these systems exist, but will also give unique insights into the death of massive stars, the evolution of binary systems and their possible association with gamma-ray bursts, $r$-process enrichment and kilonovae. Here we perform binary population synthesis of isolated BHNS systems in order to present their merger rate and characteristics for ground-based GW observatories. We present the results for 420 different model permutations that explore key uncertainties in our assumptions about massive binary star evolution (e.g. mass transfer, common-envelope evolution, supernovae), and the metallicity-specific star formation rate density, and characterize their relative impacts on our predictions. We find intrinsic local BHNS merger rates spanning $\mathcal{R}_{\rm{m}}^0 \approx 4$-$830\,\rm{Gpc}^{-3}\,\rm{yr}^{-1}$ for our full range of assumptions. This encompasses the rate inferred from recent BHNS GW detections, and would yield detection rates of $\mathcal{R}_{\rm{det}} \approx 1$-$180\, \rm{yr}^{-1}$ for a GW network consisting of LIGO, Virgo and KAGRA at design sensitivity. We find that the binary evolution and metallicity-specific star formation rate density each impact the predicted merger rates by order $\mathcal{O}(10)$. We also present predictions for the GW detected BHNS merger properties and find that all 420 model variations predict that $\lesssim 5\%$ of the BHNS mergers have BH masses $\gtrsim 18\,M_{\odot}$, total masses $ \gtrsim 20\,M_{\odot}$, chirp masses $\gtrsim 5.5\,M_{\odot}$, mass ratios $ \gtrsim 12$ or $\lesssim 2$. Moreover, we find that massive NSs $\gtrsim 2\,M_{\odot}$ are expected to be commonly detected in BHNS mergers in almost all our model variations.
description: 38 pages, 18 figures, accepted to MNRAS. The authors welcome suggestions and feedback. All data and code to reproduce the results in this paper are publicly available
Distributed architectures and databases for personal communications networks and services
Creators: name: Ng, Leslie J.
Publisher: name: University of British Columbia
Year: 2008

description: The objective of Personal Communications Services (PCS) is to enable subscribers to establish or receive calls at any user-network access point, independent of geographic location. A hierarchical, distributed database architecture has been developed to perform those mobility management functions required for PCS. This database architecture is developed in the context of a distributed microcellular network architecture based on the IEEE 802.6 Metropolitan Area Network (MAN). Several access MANs are inter-networked via a backbone MAN; these backbone MANs are themselves interconnected to serve an entire metropolitan area (MA). The proposed database architecture can also be applied to other network architectures, such as those based on Asynchronous Transfer Mode (ATM) switches. The physical and logical database structure and contents have been defined. The protocols necessary to perform the basic mobility management functions of subscriber location at call setup as well as tracking of a roaming subscriber have been developed. Two subscriber location algorithms have been proposed. The signalling traffic and database transaction rates required to support subscriber location and tracking are calculated. The worst-case database transaction rate of approximately 2300 transactions per second occurs at the highest level databases. The worst case signalling traffic overhead is approximately 500 kbps on the access MAN and 2.5 Mbps on the backbone MAN. Queueing theory has been applied to determine the means and standard deviations of the database processing times for call setup. The worst case expected time for the ripple search is under 20 ms. The worst case expected time for the directory search is bounded above by 40 msor 10 ms, depending on the database transaction capacity. The approximate database sizes are estimated at 14.5, 7, and 36.8 Mbytes for the access MAN, backbone MAN and MA level databases respectively. A similar analysis is completed for a centralized database architecture, where lower level access and backbone MAN databases are eliminated and mobility management functions are performed by the centralized high level Metropolitan Area databases. The worst case transaction rate is over 7000 persecond. The worst case signalling rate is approximately 6 Mbps on both the access and backbone MANs.The worst case expected database processing time is under 10 ms, but is only achievable with databases having a much higher transaction capacity than those considered for the distributed architecture. The central MA database size is estimated to be approximately 476 Mbytes. By utilizing the localized distribution of calls to spread query traffic among different database sites and levels, our distributed database architecture is expected to be responsive and flexible as PCS demand increases. Subscriber update traffic is distributed, with detailed information stored close to subscriber locations.
Nonaxisymmetric Effects in the Black Hole Accretion Inviscid Hydrodynamics: Formation and Evolution of a Tilted Torus
Creators: name: Janiuk, Agnieszka
name: Proga, Daniel
name: Kurosawa, Ryuichi
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on the fourth phase of our study of slightly rotating accretion flows onto black holes. The main new element of this study is that we used fully three dimensional (3-D) numerical simulations. We consider hydrodynamics of inviscid accretion flows. We assume a spherically symmetric density distribution at the outer boundary, but brake the flow symmetry by introducing a small, latitude-dependent angular momentum. We also consider cases where angular momentum at large radii is latitude- and azimuth-dependent. For the latitude-dependent angular momentum, 3-D simulations confirm axisymmetric results: the material that has too much angular momentum to be accreted forms a thick torus near the equator. Consequently, accretion proceeds only through the polar funnel, and the mass accretion rate through the funnel is constrained by the size and shape of the torus, not by the outer conditions. In 3-D simulations, we found that the torus precesses, even for axisymmetric conditions at large radii. For the latitude and azimuth-dependent angular momentum, the non-rotating gas near the equator can also significantly affect the evolution of the rotating gas. In particular, it may prevent the formation of a proper torus (i.e. its closing, in the azimuthal direction). In such models, the mass accretion rate is only slightly less than the corresponding Bondi rate.
description: 22 pages, 16 figures; Accepted to ApJ; higher resolution version of the paper can be downloaded from http://users.camk.edu.pl/agnes/preprints/tilted_torus.pdf
Η επίδραση του πλεονάσματος προσόντων στην πρόθεση των εργαζομένων να συστήσουν τον οργανισμό σε τρίτους
Creators: name: Ρίγγα, Αικατερίνη Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Πλεόνασμα Προσόντων
Ταίριασμα Ατόμου - Οργανισμού
Πρόθεση Σύστασης του Οργανισμού σε Τρίτους
Overqualification
Person – Organization Fit
Intention to Recommend the Organization to Third Parties

description: Τα τελευταία χρόνια το ερευνητικό ενδιαφέρον για το πλεόνασμα προσόντων διαρκώς αυξάνεται και αυτό συμβαίνει εξαιτίας των συνεπειών που επιφέρει το συγκεκριμένο «φαινόμενο». Στην παρούσα εργασία αναπτύσσεται μία έρευνα σχετικά με τις επιδράσεις του πλεονάσματος προσόντων στις στάσεις και συμπεριφορές των εργαζομένων, καθώς και τις επιπτώσεις του φαινομένου στον οργανισμό. Συγκεκριμένα, σκοπός της έρευνας είναι να διαπιστώσει αν το πλεόνασμα προσόντων επιδρά στην πρόθεση των εργαζομένων να συστήσουν τον οργανισμό σε τρίτους, ενώ ταυτόχρονα επιδιώκει να ανακαλύψει τους διαμεσολαβητικούς παράγοντες που κατευθύνουν και καθορίζουν τη δυναμική της σχέσης αυτής. Στην έρευνα που πραγματοποιήθηκε σε δείγμα 321 εργαζομένων ελληνικών επιχειρήσεων διαπιστώθηκε ότι υπάρχει αρνητική συσχέτιση μεταξύ του πλεονάσματος προσόντων και του ταιριάσματος ατόμου - οργανισμού και ακόμη, πως το ταίριασμα ατόμου - οργανισμού συσχετίζεται θετικά με την πρόθεση σύστασης του οργανισμού. Επιπρόσθετα, διαπιστώθηκε ότι το ταίριασμα ατόμου - οργανισμού διαμεσολαβεί στη σχέση μεταξύ του πλεονάσματος προσόντων και της πρόθεσης σύστασης του οργανισμού σε τρίτους.
description: In recent years, the «phenomenon» of overqualification has been increasing, stirring further interest in research. The present thesis is going to examine the effects overqualification has on employees’ attitudes and behaviors, as well as its impact on organizations. More precisely, the purpose of the research was to determine whether the surplus of qualifications affected the employees' intention to recommend the organization to third parties, and focused to discover the mediating factors that directed and determined the above-mentioned relationship. The research, carried out on a sample of 321 employees of Greek companies, showed that there is a negative correlation between the qualification surplus and the person-organization fit. It has also been discovered that the person - organization fit was positively correlated with the intention to recommend the organization to others. In conclusion, it has been established that the person - organization fit mediated the relationship between overqualification and the intention to recommend the organization to third parties.
Traffic jams induced by rare switching events in two-lane transport
Creators: name: Reichenbach, Tobias
name: Frey, Erwin
name: Franosch, Thomas
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We investigate a model for driven exclusion processes where internal states are assigned to the particles. The latter account for diverse situations, ranging from spin states in spintronics to parallel lanes in intracellular or vehicular traffic. Introducing a coupling between the internal states by allowing particles to switch from one to another induces an intriguing polarization phenomenon. In a mesoscopic scaling, a rich stationary regime for the density profiles is discovered, with localized domain walls in the density profile of one of the internal states being feasible. We derive the shape of the density profiles as well as resulting phase diagrams analytically by a mean-field approximation and a continuum limit. Continuous as well as discontinuous lines of phase transition emerge, their intersections induce multicritical behavior.
description: 27 pages, 9 figures. Minor changes, published version
Φορείς της εκπαίδευσης των Ελλήνων της Θεσσαλονίκης κατά το β΄ μισό του 19ου αιώνα
Creators: name: Καρύπη, Σεβαστή Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Ελληνική εκπαίδευση
Οθωμανοκρατούμενη Θεσσαλονίκη
Φορείς
Ορθόδοξη κοινότητα
Greek education
Ottoman-occupied Thessaloniki
Institutions
Orthodox community

description: Στην Οθωμανοκρατούμενη Θεσσαλονίκη του δεύτερου μισού του 19ου αιώνα αρχίζει να σημειώνεται μια αξιοσημείωτη εκπαιδευτική άνθηση, όπως αποτυπώνεται στην ανάπτυξη ενός πυκνού σχολικού δικτύου, στην πολυποίκιλη δράση των φιλεκπαιδευτικών συλλόγων και στη γενικότερη αναβάθμιση των εκπαιδευτικών πραγμάτων στην ευρύτερη περιοχή της Μακεδονίας. Στην εκπαιδευτική αυτή ανάταση συνέβαλαν διάφοροι φορείς, σε μεμονωμένο και, κυρίως, συλλογικό επίπεδο, ανοίγοντας τελικά τον δρόμο για την απελευθέρωση της πόλης σε συνάρτηση με άλλους κοινωνικοοικονομικούς παράγοντες και σχετικές εθνικές και πολιτικές εξελίξεις. Σκοπός της παρούσας διπλωματικής μεταπτυχιακής εργασίας είναι η διερεύνηση του ρόλου που διαδραμάτισαν οι διάφοροι αυτοί φορείς στην εκπαιδευτική και συνολικά πνευματική ανάταση της Θεσσαλονίκης κατά το δεύτερο μισό του 19ου αιώνα. Ιδιαίτερη έμφαση στην παρούσα μελέτη αποδίδεται στον ρόλο της Εκκλησίας και της ελληνορθόδοξης κοινότητας της πόλης, στους φιλεκπαιδευτικούς και άλλους πολιτιστικούς συλλόγους, στους ευεργέτες και δωρητές, καθώς και στους λόγιους και εκπαιδευτικούς, οι οποίοι συνέβαλαν τα μέγιστα στην πύκνωση του σχολικού δικτύου και στην ευρύτερη εκπαιδευτική άνθηση της Θεσσαλονίκης.
description: In the Ottoman-occupied Thessaloniki of the second half of the 19th century a remarkable educational boom began to take place, as reflected in the development of a dense school network, the multifarious activity of educational institutions and the general upgrading of the educational reality in the wider area of Macedonia. Various actors, both individually and collectively, contributed to this educational upheaval, eventually paving the way for the liberation of the city on the basis of other socio-economic factors and related national and political developments. The aim of this postgraduate thesis is to explore the role of these various institutions that played in the educational and overall spiritual upgrade of Thessaloniki during the second half of the 19th century. Particular emphasis is given to the role of the Church and the Greek-Orthodox community in the city, educational and other cultural associations, benefactors and donors, as well as scholars and educators, who have contributed greatly to the expansion of the school network and education’s flourishing of Thessaloniki.
Almost exact diagonal reflection symmetries and three-zero texture
Creators: name: Yang, Masaki J. S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper, we consider a three-zero texture with diagonal reflection symmetries in the SM. The three-zero texture has two less assumptions ($(M_{u})_{11} , (M_ν)_{11} \neq 0$) than the universal four-zero texture of mass matrices $(M_{f})_{11} = (M_{f})_{13,31} = 0$ for $f = u,d,ν, e$. The texture allows diagonal reflection symmetries to be almost exact and $d$\,-\,$e$ unification. They reproduce the CKM and MNS matrices with accuracies of $O(10^{-4})$ and $O(10^{-3})$. Some perturbative diagonalizations yield two relations with good accuracy for quark mass and mixing. Although this calculation is done in a special basis, it is a general result in a sense, because other textures and generalized $CP$ symmetries exist by some weak basis transformation. By assuming a $d$\,-\,$e$ unified relation ($M_{d} \sim M_{e}$), we obtain the lightest neutrino mass $m_{1} \simeq 2.12\, - \, 5.64\,$[meV] and the effective mass of the double beta decay $|m_{ee}| \simeq 1.23 - 2.15 \,$[meV].
description: 18 pages, the final version published in Nuclear Physics B
Antenna boresight calibration using optimal estimation techniques
Creators: name: Christianson, John G.
Publisher: name: University of British Columbia
Year: 2008

description: As part of the Canadian Department of National Defence Spotlight SAR program, the Defence Research Establishment Ottawa (DREO) has been developing a Synthetic Aperture Radar Motion Compensation System (SARMCS). The SARMCS processes accelerometer and gyro measurements from an inertial measurement unit (IMU) to estimate and compensate for radar antenna motion. Uncompensated azimuth misalignment of the antenna boresight with respect to the IMU is a significant contributor to motion compensation error. Currently, an awkward to perform, laser based antenna boresight calibration procedure is employed. This thesis investigates an alternative approach in which the antenna azimuth misalignment is estimated in-flight by means of a Kalman filter. The filter integrates data from an inertial navigation system (INS), a Global Positioning System receiver (GPS) and the IMU to maintain position, velocity and orientation information. During calibration, measurements of the antenna azimuth angle to a fixed radar target are provided by a Target Acquisition Unit (TAU). A measurement of antenna azimuth misalignment is obtained by comparing the TAU-determined antenna azimuth with a computed value based on the IMU position and heading and the known target location. Several of these measurements are processed by the Kalman filter to obtain an accurate estimate of the antenna azimuth misalignment. The current SARMCS Kalman filter integrates INS, GPS and IMU data for navigation and motion compensation purposes. Formulation of an antenna boresight calibration Kalman filter is discussed with the objective of augmenting the SARMCS filter for antenna calibration. Much of the investigation involves simulations to determine a flight trajectory and aircraft/target geometry that will allow the filter to accurately estimate antenna misalignment in a minimum amount of time. A computer simulation software package, developed to support this effort, is described and the analysis methods and results of the simulations are presented. It is shown that two horizontal manoeuvres a few minutes apart followed by a period of TAU measurements while flying directly toward the target is effective. A performance evaluation using synthesized sensor data provided by DREO suggests that calibration to an accuracy of better than 4 arc minutes rms within a 20 minute period is feasible.
Πολυπολιτισμικότητα, θρησκευτικός πλουραλισμός και Εκπαίδευση. Κριτική προσέγγιση του νομοθετικού πλαισίου από την οπτική της Κοινωνιολογίας του Δικαίου.
Creators: name: Πετροπούλου, Αλεξάνδρα Πέτρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Πολυπολιτισμικότητα
Θρησκεία
Εκπαίδευση
Multiculturalism
Religion
Education

description: Σκοπός της εργασίας μου ήταν η κριτική προσέγγιση από την οπτική της Κοινωνιολογίας του Δικαίου του εάν και κατά πόσο το ελληνικό εκπαιδευτικό νομοθετικό πλαίσιο ανταποκρίνεται στις ανάγκες του πολιτισμικά ανομοιογενούς μαθητικού πληθυσμού του ελληνικού σχολείου. Ασχοληθήκαμε αρχικά με την ανάλυση των εννοιών της ταυτότητας, του έθνους, του κράτους, της εξελικτικής διαδρομής από τη σύσταση εθνών κρατών ως την ύπαρξη πολυπολιτισμικών εντός αυτών, των μοντέλων πολιτικής διαχείρισης πολυπολιτισμικών κοινωνιών και των επιπτώσεων στις πολιτισμικές ομάδες που τις συγκροτούν. Έπειτα εξετάσαμε τη διαχείριση της πολιτισμικής ετερότητας από τον πολιτικό θεσμό της Εκπαίδευσης, παρατέθηκαν τα διάφορα μοντέλα εκπαιδευτικής προσέγγισης της πολιτισμικής ετερότητας και αναφέρθηκαν οι προσπάθειες της Διεθνούς και Ευρωπαϊκής Κοινότητας να διασφαλίσουν, ανάμεσα στα άλλα, την κατοχύρωση στο δικαίωμα ισότιμης πρόσβασης σε ποιοτική εκπαίδευση για όλα τα παιδιά χωρίς διακρίσεις. Τέλος, παραθέσαμε την εξέλιξη της εκπαιδευτικής πολιτικής και του νομοθετικού πλαισίου από τη σύσταση του νεοελληνικού κράτους έως τις μέρες μας και τους λόγους εξαιτίας των οποίων το ελληνικό σχολείο στην πράξη δεν είναι πολυπολιτισμικό και η νομική διευθέτηση του θρησκευτικού πλουραλισμού στην εκπαίδευση παραμένει προβληματική.
description: The purpose of my thesis was to critically approach, from the perspective of Sociology of Law, of whether and to what extent the educational legal framework responds to the needs of the culturally heterogeneous student population of the Greek school. We initially dealt with the analysis of the concepts of identity, nation, state, the evolution from the constitution of nation states to the existence of multicultural societies within them, models of political management of multicultural societies and the impact on the cultural groups that constitute them. Furthermore, we examined the management of cultural diversity by the political institution of Education and outlined the various models of the educational approach to cultural diversity, as well as the efforts of the International and European Community to ensure, among other human rights, the right to equal access to high quality education for all children without cultural or other discriminations. Finally, we cited the evolution of educational policy and its legislative framework from the establishment of the Modern Greek State to the present day, as well as the reasons why the Greek School in practice is not multicultural and the legal settlement of religious pluralism in Education still remains an unresolved problem.
Constructing Parish-level Data and RSD-level Data on Transport Infrastructure in England and Wales 1851-1911
Creators: name: Satchell, Andrew
name: Bennett, Robert
name: Shaw Taylor, Leigh
name: Bogart, Dan
Publisher: name: Apollo - University of Cambridge Repository
Year: 2019
Subjects: Entrepreneurship
Railways
Water transport
Road transport
Census

description: This paper documents the methods used to construct a database at parish and RSD-level of transport infrastructure in England and Wales for each census year 1851-1911: for ports; turnpike roads (1851 only); first class roads (1911 only); railway lines and stations; waterways; and presence of sea coasts.
Measuring cosmogenic Li9 background in a reactor neutrino experiment
Creators: name: Wen, Liangjian
name: Cao, Jun
name: Luk, Kam-Biu
name: Ma, Yuqian
name: Wang, Yifang
name: Yang, Changgen
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Cosmogenic isotopes 9Li and 8He produced in the detector are the most problematic background in the reactor neutrino experiments designed to determine precisely the neutrino mixing angle theta13. The average time interval of cosmic-ray muons in the detector is often on the order of the lifetimes of the 9Li and 8He isotopes. We have developed a method for determining this kind of background from the distribution of time since last muon for muon rate up to about 20 Hz when the background-to-signal ratio is small, on the order of a few percents.
description: 9 pages, 3 figures. To appear in NIM A
Statistical Analysis of Complex Computer Models in Astronomy
Creators: name: Lukemire, Joshua
name: Xiao, Qian
name: Mandal, Abhyuday
name: Wong, Weng Kee
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We introduce statistical techniques required to handle complex computer models with potential applications to astronomy. Computer experiments play a critical role in almost all fields of scientific research and engineering. These computer experiments, or simulators, are often computationally expensive, leading to the use of emulators for rapidly approximating the outcome of the experiment. Gaussian process models, also known as Kriging, are the most common choice of emulator. While emulators offer significant improvements in computation over computer simulators, they require a selection of inputs along with the corresponding outputs of the computer experiment to function well. Thus, it is important to select inputs judiciously for the full computer simulation to construct an accurate emulator. Space-filling designs are efficient when the general response surface of the outcome is unknown, and thus they are a popular choice when selecting simulator inputs for building an emulator. In this tutorial we discuss how to construct these space filling designs, perform the subsequent fitting of the Gaussian process surrogates, and briefly indicate their potential applications to astronomy research.
Linear temperature dependence of conductivity in Si two-dimensional electrons near the apparent metal-to-insulator transition
Creators: name: Lai, K.
name: Pan, W.
name: Tsui, D. C.
name: Lyon, S.
name: Muhlberger, M.
name: Schaffler, F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In a high mobility two-dimensional electron system in Si, near the critical density, $n_c=0.32\times10^{11}$cm$^{-2}$, of the apparent metal-to-insulator transition, the conductivity displays a linear temperature ($T$) dependence around the Fermi temperature. When $σ_0$, the extrapolated T=0 conductivity from the linear T-dependence, is plotted as a function of density, two regimes with different $σ_0(n)$ relations are seen, suggestive of two different phases. Interestingly, a sharp transition between these two regimes coincides with $n_c$, and $σ_0$ of the transition is $\sim$ $e^2/h$, the quantum conductance, per square. Toward T=0, the data deviate from linear $σ(T)$ relation and we discuss the possible percolation type of transition in our Si sample.
description: 4 Revtex pages, 3 figures
Study of the Standard Model with weak decays of charmed hadrons at BESIII
Creators: name: Li, Hai-Bo
name: Lyu, Xiao-Rui
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A comprehensive review of weak decays of charmed hadrons ($D^{0/+}$, $D^+_s$ and $Λ^+_c$) based on analyses of the threshold data from $e^+e^-$ annihilation in the BESIII experiment is presented. Current experimental challenges and successes in understanding decays of the charmed hadrons are discussed. Precise calibrations of QCD and tests of the Standard Model are provided by measurements of purely leptonic and semi-leptonic decays of charmed hadrons, and lepton universality is probed in purely leptonic decays of charmed mesons to three generations of leptons. Quantum correlations in threshold data samples provide access to strong phases in the neutral $D$ meson decays and probe the decay dynamics of the charmed $Λ_c$ baryon. Charm physics studies with near-threshold production of charmed particle pairs are unique to BESIII, and provide many important opportunities and challenges.
description: 24 pages, 10 figures, accepted version by the National Science Review
First Order Relativistic Three-Body Scattering
Creators: name: Lin, T.
name: Elster, Ch.
name: Polyzou, W. N.
name: Gloeckle, W.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Relativistic Faddeev equations for three-body scattering at arbitrary energies are formulated in momentum space and in first order in the two-body transition-operator directly solved in terms of momentum vectors without employing a partial wave decomposition. Relativistic invariance is incorporated within the framework of Poincare invariant quantum mechanics, and presented in some detail. Based on a Malfliet-Tjon type interaction, observables for elastic and break-up scattering are calculated up to projectile energies of 1 GeV. The influence of kinematic and dynamic relativistic effects on those observables is systematically studied. Approximations to the two-body interaction embedded in the three-particle space are compared to the exact treatment.
description: 26 pages, 13 figures
DAVLAT XIZMATINI TASHKIL ETISHDA RIVOJLANGAN OSIYO MAMLAKATLARI TAJRIBASI
Creators: name: Raximov Dilmurodjon G'ulomjon o'g'li O'zbekiston Respublikasi Prezidenti huzuridagi  Davlat boshqaruvi akademiyasi katta o'qituvchisi,  yuridik fanlar bo'yicha falsafa doktori (PhD)
Publisher: name: Zenodo
Year: 2024

description: Maqola davlat xizmatini tashkil etishda rivojlangan Osiyo davlatlari, xususan Singapur, Yaponiya va Koreya Respublikasi tajribasini tahlil qilishni maqsad qilgan. Ushbu davlatlarning davlat xizmatchilarini tayyorlash, ularning kasbiy kompetensiyasini rivojlantirish, tanlab olish kabi yoʻnalishlardagi amaliyoti tadqiq etilib, mamlakatimizga ushbu tajribalarning eng yaxshilarini tatbiq etish takliflari ishlab chiqilgan,

Kalit soʻzlar: davlat xizmati, davlat fuqarolik xizmati, davlat xizmatchilari, kadr, Osiyo, Singapur, Yaponiya, Koreya Respublikasi
Excitation and visibility of slow modes in rotating B-type stars
Creators: name: Dziembowski, W. A.
name: Daszynska-Daszkiewicz, J.
name: Pamyatnykh, A. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We use the traditional approximation to describe oscillations with frequencies comparable to the angular rotation rate. Validity of this approximation in application to main-sequence B stars is discussed. Numerical results regarding mode stability and visibility are presented for a model of the Be star HD 163868. For this object, Walker et al.(2005) detected a record number of mode frequencies using data from the small space telescope MOST. Our interpretation of these data differs from that of Walker et al. In particular, we interpret peaks in the lowest frequency range as retrograde g modes. We find instability in a large number of modes that remain undetectable because of unfavourable aspect and/or effect of cancellation. There is no clear preference to excitation of prograde modes.
description: 9 pages, 3 figures, accepted for publication in MNRAS
Additional file 6 of Human menstrual blood-derived stem cells mitigate bleomycin-induced pulmonary fibrosis through anti-apoptosis and anti-inflammatory effects
Creators: name: Chen, Xin
name: Wu, Yi
name: Wang, Yanling
name: Chen, Lijun
name: Zheng, Wendi
name: Zhou, Sining
name: Xu, Huikang
name: Li, Yifei
name: Yuan, Li
name: Xiang, Charlie
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Pharmacology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: Marine Biology
subject: Cancer
subject: Hematology

description: Additional file 6.
Eπισιτιστική ανασφάλεια στη τρίτη ηλικία
Creators: name: Παπαηλία, Θεοπούλα Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Επισιτιστική ανασφάλεια
Κίνδυνος υποθρεψίας,
Νοσηρότητα
Food insecurity
Risk of malnutrition
Comorbidity

description: Η εργασία αυτή αποτελείται από τέσσερα κεφάλαια, κάθε ένα από τα οποία συνοψίζεται συνοπτικά ακολούθως. Μετά από το εισαγωγικό κεφάλαιο παρατίθεται το κεφάλαιο ανασκόπησης της βιβλιογραφίας. Στο κεφάλαιο αυτό τονίζονται τα κενά που καλύφθηκαν από τη παρούσα εργασία. Παρουσιάζεται εν συντομία το ιστορικό της επισιτιστικής ασφάλειας και οι ορισμοί αυτής. Στη συνέχεια, περιγράφονται οι διαστάσεις της επισιτιστικής ασφάλειας και η κατάσταση που επικρατεί αναφορικά με αυτή στην Ελλάδα και στους ηλικιωμένους. Έπειτα ακολουθεί το κεφάλαιο που περιγράφει τη μεθοδολογία που ακολουθήθηκε για την επίτευξη του ερευνητικού στόχου και τα αποτελέσματα αυτής. Επί της ουσίας, στο εν λόγω κεφάλαιο παρατίθενται και αναλύονται τα αποτελέσματα της έρευνας. Τέλος, στο τέταρτο κεφάλαιο πραγματοποιείται μια συζήτηση σχετικά με τα ευρήματα που προέκυψαν και καταγράφονται τα συμπεράσματα και οι συστάσεις για μελλοντική έρευνα. Ο κύριος ερευνητικός στόχος της εργασίας αυτής είναι να προσδιοριστεί η κατάσταση της επισιτιστικής ανασφάλειας των νοικοκυριών σε ηλικιωμένους ανθρώπους στην Ελλάδα. Επιπλέον, η εργασία αποσκοπεί στο να προσδιοριστούν οι υποομάδες ηλικιωμένων που είναι πιο ευάλωτες στην επισιτιστική ανασφάλεια των νοικοκυριών, καθώς και οι παράγοντες πρόβλεψης της επισιτιστικής ανασφάλειας στα νοικοκυριά των ηλικιωμένων.
description: This present thesis consists of four chapters, each of which is summarized below. Following the introductory chapter comes the literature review chapter. This chapter highlights the gaps that were covered by this paper. The history of food insecurity and its definitions are briefly presented. Next, the dimensions of food security are described and the situation regarding this dimension in Greece and the elderly, as well. Then, the chapter describing the methodology used to achieve the research objective and its results is coming next. In essence, this chapter presents and analyzes the results of the investigation. Finally, chapter four discusses the findings and the conclusions and recommendations for future research. The main research objective of this work is to determine the state of food insecurity of households in older people in Greece. In addition, the work aims to identify the subgroups of the elderly who are most vulnerable to food insecurity in households, as well as the factors predicting food insecurity in older households.
description: Σε συνεργασία με: Ιατρικής (Δημοκρίτειο Πανεπιστήμιο Θράκης), Πολιτικών Μηχανικών T.E. (Αλεξάνδρειο Τ.Ε.Ι. Θεσσαλονίκης)
Simulating full-sky interferometric observations
Creators: name: McEwen, J. D.
name: Scaife, A. M. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Aperture array interferometers, such as that proposed for the Square Kilometre Array (SKA), will see the entire sky, hence the standard approach to simulating visibilities will not be applicable since it relies on a tangent plane approximation that is valid only for small fields of view. We derive interferometric formulations in real, spherical harmonic and wavelet space that include contributions over the entire sky and do not rely on any tangent plane approximations. A fast wavelet method is developed to simulate the visibilities observed by an interferometer in the full-sky setting. Computing visibilities using the fast wavelet method adapts to the sparse representation of the primary beam and sky intensity in the wavelet basis. Consequently, the fast wavelet method exhibits superior computational complexity to the real and spherical harmonic space methods and may be performed at substantially lower computational cost, while introducing only negligible error to simulated visibilities. Low-resolution interferometric observations are simulated using all of the methods to compare their performance, demonstrating that the fast wavelet method is approximately three times faster that the other methods for these low-resolution simulations. The computational burden of the real and spherical harmonic space methods renders these techniques computationally infeasible for higher resolution simulations. High-resolution interferometric observations are simulated using the fast wavelet method only, demonstrating and validating the application of this method to realistic simulations. The fast wavelet method is estimated to provide a greater than ten-fold reduction in execution time compared to the other methods for these high-resolution simulations.
description: 16 pages, 9 figures, replaced to match version accepted by MNRAS (major additions to previous version including new fast wavelet method)
Brain as Quantum-like Machine for Transferring Time into Mind
Creators: name: Khrennikov, Andrei Yu.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Biological sciences

description: We propose a model of processing of information in the brain which has the following distinguishing features: a). It is quantum-like (QL). The brain uses the quantum rule (given by von Neumann trace formula) for calculation of averages for psychological functions. b). Those functions are considered as self-observations of the brain. c). The QL-representation has the temporal basis. The brain is a machine transferring time into cognition. d). Any cognitive process is based on (at least) two time scales: precognitive time scale (which is very fine) and cognitive time scale (which is essentially coarser). To couple our model to physiology, behavioral science, and psychology, we consider a number of known fundamental time scales in the brain. Although the elaboration of those scales was based on advanced experimental research, there are still many controversial approaches and results. The temporal structure of the brain functioning is very complex.
Lightweight Selective Disclosure for Verifiable Documents on Blockchain
Creators: name: Saito, Kenji
name: Watanabe, Satoki
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: To achieve lightweight selective disclosure for protecting privacy of document holders, we propose an XML format for documents that can hide arbitrary elements using a cryptographic hash function and salts, which allows to be partially digitally signed and efficiently verified, as well as a JSON format that can be converted to such XML. The documents can be efficiently proven to exist by representing multiple such structures as a Merkle tree and storing its root in blockchain. We show that our proposal has advantages over known methods that represent the document itself as a Merkle tree and partially hide it.
description: 10 pages, 4 figures, 1 table
Open Access: istruzioni per l'uso
Creators: name: Commissione Open Science Università di Milano
name: Direzione Performance, assicurazione qualità, valutazione e politiche di Open Science Università di Milano
Publisher: name: Zenodo
Year: 2024

description: La Commissione Open Science di Ateneo, seguendo l'utile esempio dell'Università di Utrecht (de Boer, J., Bosman, J., Holwerda, F., Jetten, N., Livio, C., Ryane, N., Shetty, R., de Vries, H., & Utrecht University Library - Publishing Support. (2024). Open Access Faculty Toolkit. Zenodo. https://doi.org/10.5281/zenodo.12703515), mette a disposizione dei professori e ricercatori dell'ateneo delle "istruzioni per l'uso" sulla pubbicazione ad accesso aperto che considerano le diverse possibilità a disposizione e ne mettono in evidenza pro e contro, sottolineando anche le azioni che gli autori possono fare.
On distinguishing trees by their chromatic symmetric functions
Creators: name: Martin, Jeremy L.
name: Morin, Matthew
name: Wagner, Jennifer D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C05

description: Let $T$ be an unrooted tree. The \emph{chromatic symmetric function} $X_T$, introduced by Stanley, is a sum of monomial symmetric functions corresponding to proper colorings of $T$. The \emph{subtree polynomial} $S_T$, first considered under a different name by Chaudhary and Gordon, is the bivariate generating function for subtrees of $T$ by their numbers of edges and leaves. We prove that $S_T = $, where $$ is the Hall inner product on symmetric functions and $Φ$ is a certain symmetric function that does not depend on $T$. Thus the chromatic symmetric function is a stronger isomorphism invariant than the subtree polynomial. As a corollary, the path and degree sequences of a tree can be obtained from its chromatic symmetric function. As another application, we exhibit two infinite families of trees (\emph{spiders} and some \emph{caterpillars}), and one family of unicyclic graphs (\emph{squids}) whose members are determined completely by their chromatic symmetric functions.
description: 16 pages, 3 figures. Added references [2], [13], and [15]
Gluon PDF from Quark dressing in the Nucleon and Pion
Creators: name: Freese, Adam
name: Cloët, Ian C.
name: Tandy, Peter C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Gluon dressing of the light quarks within hadrons is very strong and extremely important in that it dynamically generates most of the observable mass through the breaking of chiral symmetry. The quark and gluon parton densities, $q(x)$ and $g(x)$, are necessarily interrelated since any gluon emission and absorption process, especially dressing of a quark, contributes to $g(x)$ and modifies $q(x)$. Guided by long-established results for the parton-in-parton distributions from a strict 1-loop perturbative analysis of a quark target, we extend the non-perturbative QCD approach based on the Rainbow-Ladder truncation of the Dyson-Schwinger equations to describe the interrelated valence $q_{\rm v}(x)$ and the dressing-gluon $g(x)$ for a hadron at its intrinsic model scale. We employ the pion description from previous DSE work that accounted for the gluon-in-quark effect and introduce a simple model of the nucleon for exploratory purposes. We find typically \mbox{$\langle x \rangle_g \sim 0.20$} for both pion and nucleon at the model scale, and the valence quark helicity contributes 52\% of nucleon spin. We deduce both $q_{\rm v}(x)$ and $g(x)$ from 30 calculated Mellin moments, and after adopting existing data analysis results for $q_{\rm sea}(x)$, we find that NLO scale evolution produces $g(x)$ in good agreement with existing data analysis results for the pion at 1.3 GeV and the nucleon at 5 GeV$^2$. At the scale 2 GeV typical of lattice-QCD calculations, we obtain \mbox{$\langle x \rangle_g^{\rm N} = 0.42$} in good agreement with 0.38 from the average of recent lattice-QCD calculations.
description: 8 pages, 5 figures. Removed 1 figure, added 1 figure, addded explanatory text, corrected typos, added several new references. This version to be published
Additional file 7 of Human menstrual blood-derived stem cells mitigate bleomycin-induced pulmonary fibrosis through anti-apoptosis and anti-inflammatory effects
Creators: name: Chen, Xin
name: Wu, Yi
name: Wang, Yanling
name: Chen, Lijun
name: Zheng, Wendi
name: Zhou, Sining
name: Xu, Huikang
name: Li, Yifei
name: Yuan, Li
name: Xiang, Charlie
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Pharmacology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: Marine Biology
subject: Cancer
subject: Hematology

description: Additional file 7.
N-jettiness soft function at NNLO in QCD
Creators: name: Agarwal, Prem
name: Pedron, Ivan
Publisher: name: Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Year: 2024

description: In this proceeding we present our derivation of a compact representation of the renormalized NN-jettiness soft function free of infrared and collinear divergences through next-to-next-to-leading order (NNLO) in perturbative QCD. The number NN of hard partons enters as a parameter in the formula of the finite remainder. We demonstrate analytically the cancellation of all infrared and collinear singularities between the bare soft function and its renormalization matrix in color space and we compare our results with the ones available in the literature.
Torsion pendulum facility for direct force measurements of LISA GRS related disturbances
Creators: name: Carbone, L.
name: Cavalleri, A.
name: Ciani, G.
name: Dolesi, R.
name: Hueller, M.
name: Tombolato, D.
name: Vitale, S.
name: Weber, W. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A four mass torsion pendulum facility for testing of the LISA GRS is under development in Trento. With a LISA-like test mass suspended off-axis with respect to the pendulum fiber, the facility allows for a direct measurement of surface force disturbances arising in the GRS. We present here results with a prototype pendulum integrated with very large-gap sensors, which allows an estimate of the intrinsic pendulum noise floor in the absence of sensor related force noise. The apparatus has shown a torque noise near to its mechanical thermal noise limit, and would allow to place upper limits on GRS related disturbances with a best sensitivity of 300 fN/Hz^(1/2) at 1mHz, a factor 50 from the LISA goal. Also, we discuss the characterization of the gravity gradient noise, one environmental noise source that could limit the apparatus performances, and report on the status of development of the facility.
description: Submitted to Proceedings of the 6th International LISA Symposium, AIP Conference Proceedings 2006
Hydrodynamic non-linear response of interacting integrable systems
Creators: name: Fava, Michele
name: Biswas, Sounak
name: Gopalakrishnan, Sarang
name: Vasseur, Romain
name: Parameswaran, S. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We develop a formalism for computing the non-linear response of interacting integrable systems. Our results are asymptotically exact in the hydrodynamic limit where perturbing fields vary sufficiently slowly in space and time. We show that spatially resolved nonlinear response distinguishes interacting integrable systems from noninteracting ones, exemplifying this for the Lieb-Liniger gas. We give a prescription for computing finite-temperature Drude weights of arbitrary order, which is in excellent agreement with numerical evaluation of the third-order response of the XXZ spin chain. We identify intrinsically nonperturbative regimes of the nonlinear response of integrable systems.
description: 8 pages, 3 figures + supplementary material (18 pages, 2 figures)