cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Braided matter interactions in quantum gravity via 1-handle attachment
Creators: name: Gresnigt, Niels
name: Marciano, Antonino
name: Zappala, Emanuele
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In a topological description of elementary matter proposed by Bilson-Thompson, the leptons and quarks of a single generation, together with the electroweak gauge bosons, are represented as elements of the framed braid group of three ribbons. By identifying these braids with emergent topological excitations of ribbon networks, it has been possible to encode this braid model into the framework of quantum geometry provided by loop quantum gravity. In the case of trivalent networks, it has not been possible to generate particle interactions, because the braids correspond to noiseless subsystems, meaning they commute with the evolution algebra generated by the local Pachner moves. In the case of tetravalent networks, interactions are only possible when the model's original simplicity, in which interactions take place via the composition of braids, is sacrificed. We demonstrate that it possible to preserve both the original classification of fermions, as well as their interaction via the braid product, if we embed the braid in a trivalent scheme, and supplement the local Pachner moves, with a non-local and graph changing 1-handle attachment. Moreover, we use Kauffman-Lins recoupling theory to obtain invariants of braided networks that distinguish topological configurations associated to particles in the Bilson-Thompson model.
description: 15 pages, 7 figures. v4: Improvements on exposition. Final version to appear in Phys. Rev. D
title: Topological Light–Matter Design
title: Simulations in Polariton Profiles and Ultracold Atom Systems
titleType: Subtitle
Creators: name: Rips, Konstantin
Publisher: name: Lancaster University
Year: 2021
Subjects: Topological phases of matter
polaritonics
ultracold atoms
topological insulators
fibre bundles
artificial gauge fields

description: This work analyses novel schemes for realizing topological light-matter in ultracold atom and polaritonic systems. The observed phenomena can be formulated in the language of space fibrations, homotopy, homology-cohomology duality, and the geometry of gauge fields. The main aspects of this research work consist of: 1. Polaritonic lattice geometries in dimension D=2 can simulate topological insulators based on symmetry class A Hamiltonians by breaking time-reversal symmetry. The competing transverse electric--transverse magnetic (TE-TM) (δt) and Zeeman splitting term (B) yield gapped phases - these are described by Grassmann manifolds G2,6(C) and G3,6(C) with respect to the spectral-flattened Hamiltonian on the proposed lattice geometry. Valence Bloch bundles over the Brillouin zone are illustrated, and corresponding Chern numbers computed. We discover an index formula which relates the sum of valence band Chern numbers to the index of the projector onto the valence band states. This finding sheds new light on the bulk-boundary correspondence in polaritonic lattices, and allows to extrapolate some properties of single sheet 2D Chern insulators. The formulation is supported by careful numerical analysis of the gapped phases in the (δt, B)--space. Numerical evidence allows us to predict C=2-Chern insulators, which must be accompanied by topologically protected polaritonic edge mode states. 2. Laser--assisted coupling of hyperfine levels in cold Rubidium atoms provides a platform to simulate spherical spaces which host monopoles and carry a fibre bundle structure. Within the pseudo--spin 1 realization one finds non--Landau phase transitions between ground states of Chern numbers C=2,1,0 - we compute the corresponding spin texture configurations. An explanation is offered based on a topology change of the total space of the bundle, since no typical symmetry breaking occurs. Via careful combination of numerical and topological analysis we find transitions between spaces RP3, S3 and S2×U(1). Furthermore, I respond to the recent experiment of Sugawa et al. on a pseudo--spin 3/2 system: An alternative analytical derivation of the ground state second Chern number is provided by exploiting the full symmetry of the artificial non--abelian gauge field geometry. In fact, detailed bundle structure analysis reveals a symplectic geometry with a connection to an instanton type bundle (S7,S4, S3).
Wrapped NS5-Branes, Consistent Truncations and Inönü-Wigner Contractions
Creators: name: Cheung, K. C. Matthew
name: Leung, Rahim
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct consistent Kaluza-Klein truncations of type IIA supergravity on (i) $Σ_2\times S^3$ and (ii) $Σ_3\times S^3$, where $Σ_2 = S^2/Γ$, $\mathbb{R}^2/Γ$, or $\mathbb{H}^2/Γ$, and $Σ_3 = S^3/Γ$, $\mathbb{R}^3/Γ$, or $\mathbb{H}^3/Γ$, with $Γ$ a discrete group of symmetries, corresponding to NS5-branes wrapped on $Σ_2$ and $Σ_3$. The resulting theories are a $D=5$, $\mathcal{N}=4$ gauged supergravity coupled to three vector multiplets with scalar manifold $SO(1,1)\times SO(5,3)/(SO(5)\times SO(3))$ and gauge group $SO(2)\times\left(SO(2)\ltimes_{Σ_2}\mathbb{R}^4\right)$ which depends on the curvature of $Σ_2$, and a $D=4$, $\mathcal{N}=2$ gauged supergravity coupled to one vector multiplet and two hypermultiplets with scalar manifold $SU(1,1)/U(1)\times G_{2(2)}/SO(4)$ and gauge group $\mathbb{R}^+\times\mathbb{R}^+$ for truncations (i) and (ii) respectively. Instead of carrying out the truncations at the 10-dimensional level, we show that they can be obtained directly by performing Inönü-Wigner contractions on the 5 and 4-dimensional gauged supergravity theories that come from consistent truncations of 11-dimensional supergravity associated with M5-branes wrapping $Σ_2$ and $Σ_3$. This suggests the existence of a broader class of lower-dimensional gauged supergravity theories related by group contractions that have a 10 or 11-dimensional origin.
description: 2+73 pages, 1 figure; very minor changes, reference added, published version
Kuschiten in Theben: Eine archäologische Spurensuche
Creators: name: Budka, Julia
name: Kammerzell, Frank
Publisher: name: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Year: 2021

description: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V., Nr. 18 (2007): Der Antike Sudan
Exchange Control of Nuclear Spin Diffusion in a Double Quantum Dot
Creators: name: Reilly, D. J.
name: Taylor, J. M.
name: Petta, J. R.
name: Marcus, C. M.
name: Hanson, M. P.
name: Gossard, A. C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Coherent two-level systems, or qubits, based on electron spins in GaAs quantum dots are strongly coupled to the nuclear spins of the host lattice via the hyperfine interaction. Realizing nuclear spin control would likely improve electron spin coherence and potentially enable the nuclear environment to be harnessed for the long-term storage of quantum information. Toward this goal, we report experimental control of the relaxation of nuclear spin polarization in a gate-defined two-electron GaAs double quantum dot. A cyclic gate-pulse sequence transfers the spin of an electron pair to the host nuclear system, establishing a local nuclear polarization that relaxes on a time scale of seconds. We find nuclear relaxation depends on magnetic field and gate-controlled two-electron exchange, consistent with a model of electron mediated nuclear spin diffusion.
description: related papers at http://marcuslab.harvard.edu
title: Ocena dostosowania systemu zarządzania jakością do wymagań normy ISO 9001:2015 w przedsiębiorstwie produkcyjnym
Creators: name: Konieczka, Kinga
Publisher: name: Publishing House of Poznan University of Technology
Year: 2018

description: Zeszyty Naukowe Politechniki Poznańskiej. Organizacja i Zarządzanie, 78, 77-86
Chiral Magic-Angle Twisted Bilayer Graphene in a Magnetic Field: Landau Level Correspondence, Exact Wavefunctions and Fractional Chern Insulators
Creators: name: Sheffer, Yarden
name: Stern, Ady
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We show that the flat bands in the chiral model of magic-angle twisted bilayer graphene remain exactly flat in the presence of a perpendicular magnetic field. This is shown by an exact mapping between the model and the lowest Landau level wavefunctions at an effective magnetic field, in which the external field is either augmented or reduced by one flux quantum per unit cell. When the external field reaches one flux quantum per unit cell, the model exhibits a topological phase transition. These findings allow us to analyze a Jain-series of Fractional Chern Insulators states in the exactly flat band, and to point out an unconventional dependence of the energy gap on the magnetic field.
description: 10 pages, 2 figures
Tone, nasals
Creators: name: Doko, Jeanne
name: Koutouan, Evelyne
name: Jarvis, Rebecca
name: Kapner, Julianne
name: Russell, Katherine
name: Kouadio, Timothée
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: ebr

description: Elicitation of possible nominal tone melodies, paradigms with future and negative auxiliaries with verbs of different tones
Hydrodynamics of granular gases of inelastic and rough hard disks or spheres. I. Transport coefficients
Creators: name: Megías, Alberto
name: Santos, Andrés
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The transport coefficients for dilute granular gases of inelastic and rough hard disks or spheres with constant coefficients of normal ($α$) and tangential ($β$) restitution are obtained in a unified framework as functions of the number of translational ($d_t$) and rotational ($d_r$) degrees of freedom. The derivation is carried out by means of the Chapman--Enskog method with a Sonine-like approximation in which, in contrast to previous approaches, the reference distribution function for angular velocities does not need to be specified. The well-known case of purely smooth $d$-dimensional particles is recovered by setting $d_t=d$ and formally taking the limit $d_r\to 0$. In addition, previous results [G. M. Kremer, A. Santos, and V. Garzó, Phys. Rev. E 90, 022205 (2014)] for hard spheres are reobtained by taking $d_t=d_r=3$, while novel results for hard-disk gases are derived with the choice $d_t=2$, $d_r=1$. The singular quasismooth limit ($β\to -1$) and the conservative Pidduck's gas ($α=β=1$) are also obtained and discussed.
description: 14 pages, 7 figures; v2: Minor changes
Catalytic majorization and $\ell_p$ norms
Creators: name: Aubrun, Guillaume
name: Nechita, Ion
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: An important problem in quantum information theory is the mathematical characterization of the phenomenon of quantum catalysis: when can the surrounding entanglement be used to perform transformations of a jointly held quantum state under LOCC (local operations and classical communication) ? Mathematically, the question amounts to describe, for a fixed vector $y$, the set $T(y)$ of vectors $x$ such that we have $x \otimes z \prec y \otimes z$ for some $z$, where $\prec$ denotes the standard majorization relation. Our main result is that the closure of $T(y)$ in the $\ell_1$ norm can be fully described by inequalities on the $\ell_p$ norms: $\|x\|_p \leq \|y\|_p$ for all $p \geq 1$. This is a first step towards a complete description of $T(y)$ itself. It can also be seen as a $\ell_p$-norm analogue of Ky Fan dominance theorem about unitarily invariant norms. The proofs exploits links with another quantum phenomenon: the possibiliy of multiple-copy transformations ($x^{\otimes n} \prec y^{\otimes n}$ for given $n$). The main new tool is a variant of Cramér$ theorem on large deviations for sums of i.i.d. random variables.
Handoff enhancement in mobile-ip environment
Creators: name: Woo, William
Publisher: name: University of British Columbia
Year: 2009

description: Numerous efforts have been made in extending network connectivity to mobile computers using the Internet as a backbone. The Internet Engineering Task Force (IETF) has compiled a series of technical discussions into a basic IETF mobile-IP draft proposal. At the time of writing, the draft is in the process of becoming an Internet standard. In addition to this extension, there is a compatible route optimization scheme, Internet Mobile Host Protocol (IMHP), which can be employed to improve routing efficiency of the basic proposal. In a Wireless and Mobile Data Network (WMDN), handoffs are required whenever a mobile host crosses cell boundaries. These handoffs introduce momentary disruptions and could significantly reduce the throughput at the transport layer. In this research, a new Handoff Enhanced scheme is introduced to further extend IMHP to improve both the routing efficiency and the transport layer performance during handoffs. This new scheme uses finite size buffers to store inbound datagrams for mobile hosts during handoffs. As a result, datagram losses are eliminated. This is found to improve the transport layer performance by a significant extent. The transport layer performance of the three different schemes were evaluated using the OPNET simulation package. It is found that the IMHP yields very poor performance at high handoff rates. With the new enhanced scheme, the transport layer performance improves significantly. Besides, the new enhanced scheme employs route optimization and gives better performance than the basic IETF scheme.
Geschichte der frühen Erforschung Nordostafrikas
Creators: name: Endesfelder, Erika
Publisher: name: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Year: 2021

description: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V., Nr. 18 (2007): Der Antike Sudan
NN scattering in higher derivative formulation of baryon chiral perturbation theory
Creators: name: Djukanovic, D.
name: Gegelia, J.
name: Scherer, S.
name: Schindler, M. R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider a new approach to the nucleon-nucleon scattering problem in the framework of the higher-derivative formulation of baryon chiral perturbation theory. Starting with a Lorentz-invariant form of the effective Lagrangian we work out a new symmetry-preserving framework where the leading-order amplitude is calculated by solving renormalizable equations and corrections are taken into account perturbatively. Analogously to the KSW approach, the (leading) renormalization scale dependence to any finite order is absorbed in the redefinition of a finite number of parameters of the effective potential at given order. On the other hand, analogously to Weinberg's power counting, the one-pion-exchange potential is of leading order and is treated non-perturbatively.
description: 15 pages, 4 figures, REVTeX 4, journal version. Title changed, numerical results added
Sociolinguistic interview and French reading
Creators: name: Koutouan, Evelyne
name: Kapner, Julianne
name: Kouadio, Timothée
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: Ivorian French language

description: Sociolinguistic interview conducted in French with Mrs. Koutouan, accompanied by Timothee Kouadio. Includes reading of a passage and wordlist taken from the PFC French Corpus.
Πνευματικά δικαιώματα και δημοσιογραφία
Creators: name: Εμινίδου, Ειρήνη Ρόλαντ-Γεώργιος
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Πνευματική Ιδιοκτησία
Δημοσιογραφικό έργο
Κοινωνία της Πληροφορίας
Copyrights
Journalistic project
Internet

description: Η παρούσα διπλωματική εργασία έχει ως στόχο να αναδείξει το δημοσιογραφικό έργο σε έργο πνευματικής ιδιοκτησίας και την παρουσίαση του προβλεπόμενου πλαισίου για την προστασία των πνευματικών δικαιωμάτων των δημοσιογράφων σε ένα ψηφιακό περιβάλλον που διαρκώς μεταβάλλεται . Ειδικότερα, η ανάπτυξη της εργασίας πραγματοποιείται σε πέντε μέρη-κεφάλαια . Στο πρώτο μέρος, παρουσιάζεται το ρυθμιστικό πλαίσιο που αφορά την προστασία της πνευματικής ιδιοκτησίας και καταγράφεται ο ορισμός του δημοσιογραφικού επαγγέλματος, οι κανόνες δεοντολογίας που ακολουθούνται κατά την άσκηση της και πραγματοποιείται η αναγωγή του δημοσιογραφικού έργου σε «πνευματικό έργο». Στο δεύτερο μέρος, παρουσιάζονται τα πνευματικά δικαιώματα των δημοσιογράφων είτε ως ελεύθερων επαγγελματικών είτε ως μισθωτών ενώ αναφέρονται και οι προβλεπόμενοι περιορισμοί τους . Στο τρίτο μέρος, διεξάγεται μελέτη ειδικότερων ζητημάτων που αφορούν την προστασία των πνευματικών δικαιωμάτων των δημοσιογράφων στα νέα μέσα ενημέρωσης και επικοινωνίας. ΄Έτσι , αναπτύσσονται όλα τα νομικά ζητήματα που προκύπτουν από την χρήση των νέων τεχνολογιών αλλά και υποθέσει που απασχόληση τα εθνικά και ευρωπαϊκά δικαστήρια . Στο τέταρτο μέρος, καταγράφονται όλες οι εθνικές προσπάθειες καταπολέμησης της προσβολής του πρωτότυπου πνευματικού έργου ενώ το πέμπτο και τελευταίο μέρος αποτελείται από τις συνεντεύξεις που παραχωρήθηκαν στην ερευνήτρια κα εκφράζονται τα συμπεράσματα που εξήχθησαν από την έρευνα.
description: This diploma thesis aims at highlighting the journalistic work on an intellectual property project and presenting the foreseen framework for the protection of the journalists copyrights in a digital environment that is constantly changing. In particular, the development of the work takes place in five parts-chapters. In the first part, the regulatory framework for the protection of intellectual property is presented and the definition of the journalistic profession, the rules of ethics followed in its exercise and the reduction of the journalistic work to "spiritual work" are recorded. In the second part, the journalists copyrights are presented either as freelancers or as wage earners, and their foreseen restrictions are mentioned. In the third part, a study of specific issues concerning the protection of the journalists intellectual rights in the new media and communication is being conducted. Thus, all legal issues arising from the use of new technologies, but also assumed by national and European courts, are being developed. In the fourth part, all national efforts to combat the challenge of the original intellectual work are recorded, while the fifth and final part consists of the interviews given to the researcher and the conclusions drawn from the research are expressed
Question of Names, Titles, and Iconography
Creators: name: Vittmann, Günter
Publisher: name: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Year: 2021

description: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V., Nr. 18 (2007): Der Antike Sudan
Präislamische Gräber in Nordost-Somalia
Creators: name: Gabriel, Baldur
Publisher: name: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Year: 2021

description: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V., Nr. 18 (2007): Der Antike Sudan
Ανάλυση Καρδιοτοκογραφικών Δεδομένων
Creators: name: Ξέρρας, Αθανάσιος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Καρδιοτοκογράφημα
Ανάλυση σήματος
Μεταβλητότητα της καρδιακής συχνότητας
Cardiotocography
Signal analysis
Heart Rate Variability

description: Σκοπός της πτυχιακής εργασίας ήταν η μελέτη υπάρχουσας βάσης δεδομένων καρδιοτοκογραφηματων , Physionet , CTU-UHB Intrapartum Cardiotocography Database, και ο υπολογισμός χαρακτηριστικών του καρδιοτοκογραφήματος , καθώς και η αξιολόγηση της χρησιμότητά τους στην αναγνώριση παθολογικών καταστάσεων εγκυμοσύνης και τοκετού. Έγινε προ επεξεργασία για καθαρισμό και ομογενοποίηση των δεδομένων της βάσης και στη συνέχεια υπολογισμός χαρακτηριστικών του καρδιοτοκογραφικού σήματος, βασισμένα στη διεθνή βιβλιογραφία . Στη συνέχεια εφαρμόστηκαν στατιστικές μέθοδοι συσχέτισης των χαρακτηριστικών του καρδιοτοκογραφήματος και του εμβρύου με τα κλινικά χαρακτηριστικά της εγκύου και με την πιθανή παθολογία που εμφανίστηκε (Σακχαρώδης Διαβήτης, Αρτηριακή Υπέρταση , Προεκλαμψία )
description: The aim of the present thesis was the study of one existing online database of cardiotocography examples, Physionet , CTU-UHB Intrapartum Cardiotocography Database , and to calculate the characteristics of the cardiogram, as well as to assess their usefulness in the identification of pathological conditions of pregnancy and childbirth . It was pre-processed to clean and homogenize the base data, and then calculate the cardiotocographic signal characteristics, based on the international literature. Statistical methods of correlation of cardiogram and embryo characteristics with the clinical characteristics of the pregnant woman and the possible pathology that occurred (Diabetes, Arterial Hypertension, Preeclampsia) were then applied
Magisch-religiöse Zeichen der meroitischen und postmeroitischen Epochen in Nubien
Creators: name: Kleinitz, Cornelia
Publisher: name: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Year: 2021

description: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V., Nr. 18 (2007): Der Antike Sudan
Quantifying Mn diffusion through transferred versus directly-grown graphene barriers
Creators: name: Strohbeen, Patrick J.
name: Manzo, Sebastian
name: Saraswat, Vivek
name: Su, Katherine
name: Arnold, Michael S.
name: Kawasaki, Jason K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We quantify the mechanisms for manganese (Mn) diffusion through graphene in Mn/graphene/Ge (001) and Mn/graphene/GaAs (001) heterostructures for samples prepared by graphene layer transfer versus graphene growth directly on the semiconductor substrate. These heterostructures are important for applications in spintronics; however, challenges in synthesizing graphene directly on technologically important substrates such as GaAs necessitate layer transfer and anneal steps, which introduce defects into the graphene. \textit{In-situ} photoemission spectroscopy measurements reveal that Mn diffusion through graphene grown directly on a Ge (001) substrate is 1000 times lower than Mn diffusion into samples without graphene ($D_{gr,direct} \sim 4\times10^{-18}$cm$^2$/s, $D_{no-gr} \sim 5 \times 10^{-15}$ cm$^2$/s at 500$^\circ$C). Transferred graphene on Ge suppresses the Mn in Ge diffusion by a factor of 10 compared to no graphene ($D_{gr,transfer} \sim 4\times10^{-16}cm^2/s$). For both transferred and directly-grown graphene, the low activation energy ($E_a \sim 0.1-0.5$ eV) suggests that Mn diffusion through graphene occurs primarily at graphene defects. This is further confirmed as the diffusivity prefactor, $D_0$, scales with the defect density of the graphene sheet. Similar diffusion barrier performance is found on GaAs substrates; however, it is not currently possible to grow graphene directly on GaAs. Our results highlight the importance of developing graphene growth directly on functional substrates, to avoid the damage induced by layer transfer and annealing.
Asymptotics of random density matrices
Creators: name: Nechita, Ion
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate random density matrices obtained by partial tracing larger random pure states. We show that there is a strong connection between these random density matrices and the Wishart ensemble of random matrix theory. We provide asymptotic results on the behavior of the eigenvalues of random density matrices, including convergence of the empirical spectral measure. We also study the largest eigenvalue (almost sure convergence and fluctuations).
title: Selecting the most efficient maintenance approach using AHP multiple criteria decision making at haditha hydropower plant
Creators: name: Muhsen, Abdulmuttalib A.
name: Szymański, Grzegorz M.
name: Mankhi, Tahseen A.
name: Attiya, Bashar
Publisher: name: Publishing House of Poznan University of Technology
Year: 2018

description: Zeszyty Naukowe Politechniki Poznańskiej. Organizacja i Zarządzanie, 78, 113-136
High resolution wide angle optical position detector
Creators: name: Tan, Chang Kian
Publisher: name: University of British Columbia
Year: 2009

description: A wide angle high resolution position sensing system for telerobotic system endpoint tracking and position calibration has been developed and tested. Compared to existing commercial products, the system developed has the following important features: (a) wide angle detection without any moving parts; (b) high resolution; (c) fast response; (d) low cost; and (e) robustness. The system consists of a light source, a simple optical mask, a CCD camera and a basic signal processing system. The optical mask contains specially arranged pinholes, each is dedicated to sense the position of the light source when it is within a small designated solid angle. The solid angles associated with adjacent pinholes overlap sufficiently to ensure continuity of the position sensing. The position is sensed through processing the pattern of the few light spots cast through pinholes on the mask onto the CCD sensor. Depending on the pinhole arrangement, the signal processing needed to determine the light source angular position can be cut down significantly. In general, the optical mask can be in any convex shape with the pinholes arranged in any known and easily processed pattern.
Changing patterns of violence at Qustul and Ballana in the post-Meroitic period
Creators: name: Dann, Rachael J.
Publisher: name: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Year: 2021

description: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V., Nr. 18 (2007): Der Antike Sudan
Γειωτικές δομές της ελληνικής: Από τα “κύρια” στα “βοηθητικά” έχω και είμαι
Creators: name: Ιωάννου, Δήμητρα Σταματίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Γνωσιακή Γραμματική
Υποκειμενικοποίηση
Βοηθητικά Ρήματα
Cognitive Grammar
Subjectification
Auxiliaries

description: Χρησιμοποιώντας την οπτική της γνωσιακής γλωσσολογίας για τη γραμματική, και πιο συγκεκριμένα τη Γνωσιακή Γραμματική του Roland Langacker, η παρούσα έρευνα επιχειρεί μια ανασκόπηση των βοηθητικών ρημάτων της ελληνικής, έχω και είμαι. Σημείο έναρξης αποτελούν οι γλωσσικές χρήσεις όπου τα ρήματα έχω και είμαι λειτουργούν ως κύρια ρήματα, στη συνέχεια εξετάζονται περισσότερο γραμματικοποιήμενες γλωσσικές περιφράσεις (έχω/έχει να και είμαι/είναι να) και καταλήγουμε στις δομές του παρακειμένου (έχω -ει/ έχει -εί και έχω -μένο/ είναι -μένο). Βασικός μας στόχος είναι να διατρέξουμε όλο το φάσμα της γραμματικοποίησης των δύο ρημάτων προκειμένου να δούμε πώς οι γλωσσικές δομές συνδέονται σημασιολογικά μεταξύ τους και πως η υποκειμενικότητα είναι ο βασικός μηχανισμός που επιτρέπει τις σημασιολογικές μετακινήσεις που λαμβάνουν χώρα
description: Using the perspective of cognitive linguistics in grammar, and more precisely Langacker‘s Cognitive Grammar, this study is attempting to reconsider the Greek auxiliaries έχω and είμαι. The starting points of this research were those expressions which contain the lexical verbs έχω (have) and είμαι (be). In addition, we focused on more grammaticalized expressions such as έχω/έχει να (have to) and είμαι/είναι να (am to) and finally we examined the Greek perfect (έχω -ει/ έχει -ει and έχω -μενο/ είναι -μένο). The aim of this study was to examine the entire spectrum of grammaticalization in order to understand how those expressions are semantically connected and more importantly to pinpoint how subjectification is the main mechanism that governs semantic change
H.U.N.E. 2007 – die Kirche SR022.A
Creators: name: Billig, Daniela
Publisher: name: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Year: 2021

description: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V., Nr. 18 (2007): Der Antike Sudan
title: Zastosowanie szarego modelu decyzyjnego w ocenie ryzyka zawodowego
Creators: name: Nowak, Marcin
name: Matella, Bartosz
name: Hanusko, Ewelina
Publisher: name: Publishing House of Poznan University of Technology
Year: 2018

description: Zeszyty Naukowe Politechniki Poznańskiej. Organizacja i Zarządzanie, 78, 137-149
Reliability of expert CAS diagnosis (Murray et al., 2024)
Creators: name: murray, elizabeth
name: Velleman, Shelley
name: Preston, Jonathan L.
name: Heard, Rob
name: Shibu, Akhila
name: McCabe, Patricia
Publisher: name: ASHA journals
Year: 2024
Subjects: classificationCode: 470402
subject: Child language acquisition
classificationCode: 420110
subject: Speech pathology
classificationCode: 460211
subject: Speech production

description: Purpose: The current standard for clinical diagnosis of childhood apraxia of speech (CAS) is expert clinician judgment. The psychometric properties of this standard are not well understood; however, they are important for improving clinical diagnosis. The purpose of this study is to determine the extent to which experts agree on the clinical diagnosis of CAS using two cohorts of children with mixed speech sound disorders (SSDs).Method: Speech samples of children with SSDs were obtained from previous and ongoing research from video recordings of children aged 3–8 years (n = 36) and audio recordings of children aged 8–17 years (n = 56). A total of 23 expert, English-speaking clinicians were recruited internationally. Three of these experts rated each speech sample to provide a description of the observed features and a diagnosis. Intrarater reliability was acceptable at 85% agreement.Results: Interrater reliability on the presence or absence of CAS among experts was poor both as a categorical diagnosis (κ = .187, 95% confidence interval [CI] [0.089, 0.286]) and on a continuous “likelihood of CAS” scale (0–100; intraclass correlation = .183, 95% CI [.037, .347]). Reliability was similar across the video-recorded and audio-only samples. There was greater agreement on other diagnoses (such as articulation disorder) than on the diagnosis of CAS, although these too did not meet the predetermined standard. Likelihood of CAS was greater in children who presented with more American Speech-Language-Hearing Association CAS consensus features.Conclusions: Different expert raters had different thresholds for applying the diagnosis of CAS. If expert clinician judgment is to be used for diagnosis of CAS or other SSDs, further standardization and calibration is needed to increase interrater reliability. Diagnosis may require operationalized checklists or reliable measures that operate along a diagnostic continuum.Supplemental Material S1. Qualtrics Rating Form.Supplemental Material S2. Rating instructions.Supplemental Material S3. Rating definitions.Supplemental Material S4. Correlations between features and the likelihood of CAS.Supplemental Material S5. Data sheets and read me file.Murray, E., Velleman, S., Preston, J. L., Heard, R., Shibu, A., & McCabe, P. (2024). The reliability of expert diagnosis of childhood apraxia of speech. Journal of Speech, Language, and Hearing Research, 67(9S), 3309–3326. https://doi.org/10.1044/2023_JSLHR-22-00677Publisher Note: This article is part of the Special Issue: Selected Papers From the 2022 Apraxia Kids Research Symposium.
Experimental verification of rapid tracking by a robot manipulator in short duration processes
Creators: name: Lin, Sunny X. Y.
Publisher: name: University of British Columbia
Year: 2009

description: This thesis presents results of a series of experiments carried out to evaluate the applicability and performance of the recently developed Rapid Tracking Control Methodology on a robot manipulator. The control experiments were done on the UBC Parallelogram Direct Drive Arm (PDDARM), with the objective to control the arm to track an almost arbitrarily specified short but complex trajectory precisely. This experimental research project consists of two phases. The first involves estimation of the dynamic model of the direct drive manipulator. A practical and effective procedure was developed from the PDDARM Dynamic Equations of Motion to generate a dynamic equation which is linear in terms of the manipulator inertial parameters. This was then used to identify a dynamic model of the direct drive manipulator suitable for the purposes of control. The identification results were quite good since the applied torques can be predicted quite accurately from the estimated parameters. The second phase of the research is to apply the estimated dynamic model of the PDDARM to evaluate the trajectory following control performance of the Rapid Tracking Control algorithm. Observations and analysis of the experimental results show that the Rapid Tracking Control algorithm can significantly improve the trajectory following capability of a robot manipulator, as well it has all of the nice properties predicted by the previous theoretical analysis. It was further found that the application of this algorithm actually reduces the amount of time during which the system actuators may saturate when tracking a complex trajectory. Due to the fact that the algorithm is equivalent to a very high order feedback/feedforward controller, its output excites the controlled system quite persistently during operation. As a result, its application also facilitates identification of the system model for adaptive control.
Στάσεις και Πρακτικές εκπαιδευτικών Πρωτοβάθμιας Εκπαίδευσης απέναντι στη Διαπολιτισμικότητα και τη συνεργατική μάθηση ανάμεσα σε γηγενείς και δίγλωσσους μαθητές
Creators: name: Κιουρτσίδου, Δέσποινα Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Ομαδοσυνεργατική Διδασκαλία και Μάθηση
Πρωτοβάθμια Εκπαίδευση
Μέθοδοι Διδασκαλίας, Απόψεις Εκπαιδευτικών.
Cooperative Learning
Primary Education
Educational methods, Teachers’ opinions

description: Σκοπός της παρούσας έρευνας είναι να μελετηθούν οι στάσεις και οι απόψεις των εκπαιδευτικών που εργάζονται σε δημοτικά σχολεία της Πτολεμαΐδας και της γύρω αγροτικής περιοχής του νομού Κοζάνης όσον αφορά αφενός την εργασία των μαθητών/τριών σε ομάδες, δηλαδή τις συνεργατικές μορφές μάθησης και η διερεύνηση της συμβολής που μπορεί να έχει στη δημιουργία σχέσεων αναγνώρισης μεταξύ γηγενών και δίγλωσσων μαθητών/τριών. Στην έρευνα συμμετείχαν 115 εκπαιδευτικοί πρωτοβάθμιας εκπαίδευσης. Τα αποτελέσματα από την ανάλυση των απαντήσεων επιβεβαιώνουν τα οφέλη της χρήσης των ομάδων εργασίας τόσο για τους/τις μαθητές/τριες όσο και για τους/τις εκπαιδευτικούς, αλλά και τα οφέλη που μπορεί να έχει σε σχέση με την ενδυνάμωση των σχέσεων μεταξύ γηγενών και δίγλωσσων μαθητών/τριών
description: The purpose of this research is to study the attitudes and views of teachers working in elementary schools in Ptolemaida city and the surrounding rural area of the prefecture of Kozani regarding the work of pupils in groups, is cooperative forms of learning and exploration contributing to the creation of recognition relationships between native and bilingual learners. 115 primary school teachers participated in the survey. The results of the analysis of the answers confirm the benefits of using the working groups for both students and teachers, as well as the benefits it can have in terms of strengthening the relations between native and bilingual students
Reliability of expert CAS diagnosis (Murray et al., 2023)
Creators: name: murray, elizabeth
name: Velleman, Shelley
name: Preston, Jonathan L.
name: Heard, Rob
name: Shibu, Akhila
name: McCabe, Patricia
Publisher: name: ASHA journals
Year: 2023
Subjects: classificationCode: 470402
subject: Child language acquisition
classificationCode: 420110
subject: Speech pathology
classificationCode: 460211
subject: Speech production

description: Purpose: The current standard for clinical diagnosis of childhood apraxia of speech (CAS) is expert clinician judgment. The psychometric properties of this standard are not well understood; however, they are important for improving clinical diagnosis. The purpose of this study is to determine the extent to which experts agree on the clinical diagnosis of CAS using two cohorts of children with mixed speech sound disorders (SSDs).Method: Speech samples of children with SSDs were obtained from previous and ongoing research from video recordings of children aged 3–8 years (n = 36) and audio recordings of children aged 8–17 years (n = 56). A total of 23 expert, English-speaking clinicians were recruited internationally. Three of these experts rated each speech sample to provide a description of the observed features and a diagnosis. Intrarater reliability was acceptable at 85% agreement.Results: Interrater reliability on the presence or absence of CAS among experts was poor both as a categorical diagnosis (κ = .187, 95% confidence interval [CI] [0.089, 0.286]) and on a continuous “likelihood of CAS” scale (0–100; intraclass correlation = .183, 95% CI [.037, .347]). Reliability was similar across the video-recorded and audio-only samples. There was greater agreement on other diagnoses (such as articulation disorder) than on the diagnosis of CAS, although these too did not meet the predetermined standard. Likelihood of CAS was greater in children who presented with more American Speech-Language-Hearing Association CAS consensus features.Conclusions: Different expert raters had different thresholds for applying the diagnosis of CAS. If expert clinician judgment is to be used for diagnosis of CAS or other SSDs, further standardization and calibration is needed to increase interrater reliability. Diagnosis may require operationalized checklists or reliable measures that operate along a diagnostic continuum.Supplemental Material S1. Qualtrics Rating Form.Supplemental Material S2. Rating instructions.Supplemental Material S3. Rating definitions.Supplemental Material S4. Correlations between features and the likelihood of CAS.Supplemental Material S5. Data sheets and read me file.Murray, E., Velleman, S., Preston, J. L., Heard, R., Shibu, A., & McCabe, P. (2023). The reliability of expert diagnosis of childhood apraxia of speech. Journal of Speech, Language, and Hearing Research. Advance online publication. https://doi.org/10.1044/2023_JSLHR-22-00677Publisher Note: This article is part of the Special Issue: Selected Papers From the 2022 Apraxia Kids Research Symposium.
D5.2.1-Flight Test Report
Creators: name: I. De Angelis
name: F. Lolli
Publisher: name: Zenodo
Year: 2021
Subjects: Flight Test Report
Radar
Anti Collision

description: This document is the ODESSA System Test report. Aim of the document is to report and analyse the different test in order to:  Collecting data with the aim of verifying the detection performances of the ODESSA sensor “B” Model  Characterising the ODESSA sensor “B Model” behaviour in different environmental condition The following specific objectives will be pursued:  Radar sensor calibration in order to take into account masking created by the platform  Sensor remote control (On, Off, Radar Inhibition, …)  Scan area verification during helicopter/VTOL take –off, landing and on ground phases  Verification of radar dynamic aperture  Detection performances in different operational conditions  Characterisation of detection performances in different environmental conditions  Classification of target as provided in the SSS  Verification of HMI formats.
H.U.N.E. 2007: Arbeiten auf der Insel Us
Creators: name: Lange, Mathias
Publisher: name: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Year: 2021

description: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V., Nr. 18 (2007): Der Antike Sudan
Felskunst im Fluss: Die Bilderwelt der Insel Us am Vierten Nilkatarakt
Creators: name: Kleinitz, Cornelia
Publisher: name: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Year: 2021

description: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V., Nr. 18 (2007): Der Antike Sudan
Humboldt University Nubian Expedition 2007: Arbeiten auf Us und Sur
Creators: name: Näser, Claudia
Publisher: name: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Year: 2021

description: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V., Nr. 18 (2007): Der Antike Sudan
Thermal and dissipative effects in Casimir physics
Creators: name: Brown-Hayes, M
name: Brownell, J. H.
name: Dalvit, D. A. R.
name: Kim, W. J.
name: Lambrecht, A.
name: Lombardo, F. C.
name: Mazzitelli, F. D.
name: Middleman, S. M.
name: Nesvizhevsky, V. V.
name: Onofrio, R.
name: Reynaud, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We report on current efforts to detect the thermal and dissipative contributions to the Casimir force. For the thermal component, two experiments are in progress at Dartmouth and at the Institute Laue Langevin in Grenoble. The first experiment will seek to detect the Casimir force at the largest explorable distance using a cylinder-plane geometry which offers various advantages with respect to both sphere-plane and parallel-plane geometries. In the second experiment, the Casimir force in the parallel-plane configuration is measured with a dedicated torsional balance, up to 10 micrometers. Parallelism of large surfaces, critical in this configuration, is maintained through the use of inclinometer technology already implemented at Grenoble for the study of gravitationally bound states of ultracold neutrons, For the dissipative component of the Casimir force, we discuss detection techniques based upon the use of hyperfine spectroscopy of ultracold atoms and Rydberg atoms. Although quite challenging, this triad of experimental efforts, if successful, will give us a better knowledge of the interplay between quantum and thermal fluctuations of the electromagnetic field and of the nature of dissipation induced by the motion of objects in a quantum vacuum.
description: Contribution to QFEXT'06, appeared in special issue of Journal of Physics A
Development of a wireless, motion measuring device for athletic or other activities. Validation and evaluation for swimming
Creators: name: Κοζαλάκης, Κωνσταντίνος Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Καταγραφή κίνησης
Αισθητήρας MEM
Ασύρματη επικοινωνία
Motion measuring
MΕΜ sensor
Wireless communication

description: Η εργασία αφορά την μελέτη, τον σχεδιασμό και την υλοποίηση μιας μετρητικής συσκευής, η οποία μπορεί, σε πραγματικό χρόνο, να καταγράφει και να εκπέμπει σε έναν υπολογιστή μετρήσεις επιτάχυνσης και προσανατολισμού. Η συσκευή κατασκευάστηκε ώστε να χρησιμοποιηθεί στην κολύμβηση, ως εργαλείο προπόνησης. Σημαντικό είναι το γεγονός, πως η επεξεργασία των δεδομένων γίνεται με την βοήθεια ειδικού λογισμικού στον υπολογιστή και όχι στην μετρητική συσκευή. Η συσκευή μπορεί εύκολα να χρησιμοποιηθεί σε κάποιο άλλο άθλημα, αλλά και για την καταγραφή κίνησης οχημάτων, μηχανισμών ή φυσικών φαινομένων, απλά προσαρμόζοντας το εξειδικευμένο λογισμικό του υπολογιστή. Η κατασκευή στηρίζεται στον μικροεπεξεργαστή ATmega328. Χρησιμοποιεί το MPU-9250, έναν αισθητήρα που επιστρέφει μετρήσεις επιτάχυνσης γωνιακής ταχύτητας και έντασης μαγνητικού πεδίου. Για την ασύρματη μετάδοση των δεδομένων χρησιμοποιεί το NRF24L01+. Στα πλαίσια της εργασίας κατασκευάστηκε επιτυχώς ένα δίκτυο έξι μετρητικών συσκευών και ενός δέκτη που συνδέεται στον υπολογιστή. Επίσης έγινε ανάπτυξη του προγράμματος των μικροελεγκτών, καθώς και ανάπτυξη λογισμικού για την λήψη και ανάλυση των δεδομένων. Κατά την χρήση της συσκευής για καταγραφή της κίνησης ενός κολυμβητή, επιβεβαιώθηκε η ορθή λειτουργία του υλικού. Tα δεδομένα που συλλέχθηκαν περιέχουν διαχωρίσιμη από τον θόρυβο και τα σφάλματα πληροφορία, και έτσι μπορούν να εξαχθούν συμπεράσματα για την κίνηση του αθλητή
description: This project is about the study, design and implementation of a sensing device, which can obtain and transmit acceleration and orientation data to a personal computer, acceleration and orientation data, in real time. The device was designed to be used in swimming as a training tool. It is important that acquired data are processed by a special software on the computer instead of the device’s processor. The device can be easily used in other sports, but also for recording vehicle movements or physical phenomenon, simply by customizing the computer's specialized software. The construction is based on the ATmega328 microprocessor. It uses the MPU-9250, a 9-degree of freedom sensor, returning acceleration, angular speed and magnetic field strength measurements. Also, NRF24L01+ was used to wirelessly transmit the data. For this project, a network of six sensing devices and a receiver connected to the computer were successfully built. Also, the microcontroller program as well as the computer software for data acquisition and analysis were developed. Using the device to record the movement of a swimmer, the correct functioning of the hardware was confirmed. Also, the data collected contains information that can be separable from noise and error, and conclusions about the athlete's movement can be exported
title: Analiza różnic kulturowych na przykładzie przedsiębiorstwa międzynarodowego
Creators: name: Ragin-Skorecka, Katarzyna
name: Stempińska, Roksana
Publisher: name: Publishing House of Poznan University of Technology
Year: 2018

description: Zeszyty Naukowe Politechniki Poznańskiej. Organizacja i Zarządzanie, 78, 169-186
Non-Abelian Hybrid Fracton Orders
Creators: name: Tantivasadakarn, Nathanan
name: Ji, Wenjie
name: Vijay, Sagar
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We introduce lattice gauge theories which describe three-dimensional, gapped quantum phases exhibiting the phenomenology of both conventional three-dimensional topological orders and fracton orders, starting from a finite group $G$, a choice of an Abelian normal subgroup $N$, and a choice of foliation structure. These hybrid fracton orders -- examples of which were introduced in arXiv:2102.09555 -- can also host immobile, point-like excitations that are non-Abelian, and therefore give rise to a protected degeneracy. We construct solvable lattice models for these orders which interpolate between a conventional, three-dimensional $G$ gauge theory and a pure fracton order, by varying the choice of normal subgroup $N$. We demonstrate that certain universal data of the topological excitations and their mobilities are directly related to the choice of $G$ and $N$, and also present complementary perspectives on these orders: certain orders may be obtained by gauging a global symmetry which enriches a particular fracton order, by either fractionalizing on or permuting the excitations with restricted mobility, while certain hybrid orders can be obtained by condensing excitations in a stack of initially decoupled, two-dimensional topological orders.
description: 17+11 pages, 4 figures, 7 tables. Added discussion on planons supported in multiple layers. Published version
title: Kastomizacja jako czynnik ryzyka organizacyjnego
Creators: name: Stasiuk-Piekarska, Anna K.
name: Wyrwicka, Magdalena K.
name: Hadaś, Łukasz
Publisher: name: Publishing House of Poznan University of Technology
Year: 2018

description: Zeszyty Naukowe Politechniki Poznańskiej. Organizacja i Zarządzanie, 78, 187-200