cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A low mass cluster of extremely red galaxies at z=1.10 in the GOODS Southern Field
Creators: name: Díaz-Sánchez, Anastasio
name: Villo-Pérez, Isidro
name: Pérez-Garrido, Antonio
name: Rebolo, Rafael
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have studied the spatial clustering of high redshift (z > 1) extremely red objects (EROs) as a function of photometric redshift in the GOODS Southern Field using public data. A remarkable overdensity of extremely red galaxies (I-Ks > 4) is found at an average photometric redshift z=1.10. Nine objects (six are EROs) within 50 arcsec of the brightest infrared galaxy in this overdensity present spectroscopic redshifts in the range 1.094 < z < 1.101 with a line-of-sight velocity dispersion of 433 km/s typical of an Abell richness class R=0 cluster. Other potential members of this cluster, designated as GCL J0332.2-2752, have been identified using photometric redshifts and the galaxy density profile studied as a function of radius. The mass of the cluster is preliminary estimated at M ~ 5-7 x 10^{13} M_{\sun}. Using available Chandra data, we limit the rest-frame X-ray luminosity of the cluster to less than L_X = 7.3 x 10^{42} erg/s (0.5-2.0 keV). This low-mass, low L_X cluster at z > 1 shows the potential of EROs to trace clusters of galaxies at high redshift.
description: Accepted for publication in MNRAS, 18 Feb 07
Link Homotopy in S^n x R^{m-n} and Higher Order mu-invariants
Creators: name: Koschorke, Ulrich
Publisher: name: arXiv
Year: 2006
Subjects: subject: Algebraic Topology (math.AT)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: Given a suitable link map f into a manifold M, we constructed, in [10], link homotopy invariants kappa(f) and mu(f). In the present paper we study the case M=S^n x R^{m - n} in detail. Here mu(f) turns out to be the starting term of a whole sequence mu^(s)(f), s = 0, 1, ..., of higher mu-invariants which together capture all the information contained in kappa(f). We discuss the geometric significance of these new invariants. In several instances we obtain complete classification results. A central ingredient of our approach is the homotopy theory of wedges of spheres.
Precision Fe Kalpha and Fe Kbeta Line Spectroscopy of the Seyfert 1.9 Galaxy NGC 2992 with Suzaku
Creators: name: Yaqoob, Tahir
name: Murphy, Kendrah D.
name: Griffiths, Richard E.
name: Haba, Yoshito
name: Inoue, Hajime
name: Itoh, Takeshi
name: Kelley, Richard
name: Kokubun, Motohide
name: Markowitz, Alex
name: Mushotzky, Richard
name: Okajima, Takashi
name: Ptak, Andrew
name: Reeves, James
name: Serlemitsos, Peter J.
name: Takahashi, Tadayuki
name: Terashima, Yuichi
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present detailed time-averaged X-ray spectroscopy in the 0.5--10 keV band of the Seyfert~1.9 galaxy NGC 2992 with the Suzaku X-ray Imaging Spectrometers (XIS). We model the complex continuum in detail. There is an Fe K line emission complex that we model with broad and narrow lines and we show that the intensities of the two components are decoupled at a confidence level >3sigma. The broad Fe K line has an EW of 118 (+32,-61) eV and could originate in an accretion disk (with inclination angle greater than ~30 degrees). The narrow Fe Kalpha line has an EW of 163 (+47,-26) eV and is unresolved FWHM <4090 km/s) and likely originates in distant matter. The absolute flux in the narrow line implies that the column density out of the line-of-sight could be much higher than measured in the line-of-sight, and that the mean (historically-averaged) continuum luminosity responsible for forming the line could be a factor of several higher than that measured from the data. We also detect the narrow Fe Kbeta line with a high signal-to-noise ratio and describe a new robust method to constrain the ionization state of Fe responsible for the Fe Kalpha and Fe Kbeta lines that does not require any knowledge of possible gravitational and Doppler energy shifts affecting the line energies. For the distant line-emitting matter (e.g. the putative obscuring torus) we deduce that the predominant ionization state is lower than Fe VIII (at 99% confidence), conservatively taking into account residual calibration uncertainties in the XIS energy scale and theoretical and experimental uncertainties in the Fe K fluorescent line energies. From the limits on a possible Compton-reflection continuum it is likely that the narrow Fe Kalpha and Fe Kbeta lines originate in a Compton-thin structure.
description: Abstract is abridged. Accepted for publication in the Suzaku special issue of PASJ (November 2006). 18 pages, 6 figures
Sweet potato response to shading and potassium
Creators: name: Soenarto
Publisher: name: University of British Columbia
Year: 2009

description: A study of the effects of shade and K on sweet potato was conducted to explore the possibility of the interaction between shade and potassium treatments. The response of sweet potato plants treated with combinations of four levels of shade and four levels of K in a factorial experiment was examined by using a split plot design with whole plots replicated three times. Plant growth analysis, two-dimensional partitioning analysis and path coefficient analysis were used to evaluate responses of sweet potato to the different environmental conditions created by the treatments applied. The growth of sweet potato plants was more influenced by shade than by K. The relationships between shade and tuberous root weight were largely influenced by negative indirect effects. Shade indirectly affected tuberous roots through stem number, stem length, stem weight and leaf number. These yield components significantly contributed to tuberous root weight. Potassium linearly contributed to tuberous root variation, but the contribution of K to tuberous root weight was smaller than that of shade. The interaction between shade and K contributed to variation of stem weight and of stem number, and also contributed to variation in leaf area and in leaf weight. It is suggested that sweet potato could tolerate 25% shade and under these conditions the optimum rate of K was approximately 120 kg . h1a of02K. Shade affected yield variation of large tuberous roots through its influence on total weight of tuberous roots, while K affected yield of large tuberous roots by way of total number of tuberous roots. The total tuberous root weight and number of tuberous roots both contributed to the weight variation of large tuberous roots. The interaction between shade and K significantly affected both of these two yield components. The P concentration in tuberous roots and the K concentrations in both leaves and stems increased with increasing levels of shade. Potassium application decreased the N concentration in tuberous roots, but increased the P concentration in stems and the K concentration in both stems and petioles. Leaf starch concentration was not significantly affected by either shade or K treatments.
3D Lattice-Boltzmann Model for Magnetic Reconnection
Creators: name: Mendoza, M.
name: Munoz, J. D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: In this paper we develop a 3D Lattice-Boltzmann model that recovers in the continuous limit the two-fluids theory for plasmas, and consecuently includes the generalizated Ohm's law. The model reproduces the magnetic reconnection process just by given the right initial equlibrium conditions in the magnetotail, without any assumption on the resistivity in the diffusive region. In this model, the plasma is handled like two fluids with an interaction term, each one with distribution functions associated to a cubic lattice with 19 velocities (D3Q19). The electromagnetic fields are considered like a third fluid with an external force on a cubic lattice with 13 velocities (D3Q13). The model can simulate either viscous fluids in the incompressible limit or non-viscous compressible fluids, and sucessfully reproduces both the Hartmann flow and the magnetic reconnection in the magnetotail. The reconnection rate obtained with this model is R=0.109, which is in excellent agreement with the observations.
description: Submitted to PRE, Computational Physics. 11 pages and 9 figures
Αφαίρεση βιοκεραμικού φυράματος από τους ριζικούς σωλήνες κατά την επανάληψη της ενδοδοντικής θεραπείας. Συγκριτική μελέτη
Creators: name: Κάκουρα, Φλώρα Σπυρίδων
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: BioRoot RCS
Φύραμα ενδοδοντίας
Επανάληψη
Root canal sealer
Retreatability

description: Σκοπός: Η αξιολόγηση του εναπομείναντος εμφρακτικού υλικού, της επαναπρόσβασης στο μήκος εργασίας και της επαναπόκτησης ακρορριζικής διαβατότητας μετά την επανάληψη εμφράξεων μονού κώνου γουταπέρκας και BioRoot RCS, και η σύγκρισή του με τα φυράματα TotalFill BC Sealer και AH 26. Υλικά και Μέθοδος: Χρησιμοποιήθηκαν 60 μονόρριζοι κυνόδοντες, οι οποίοι προπαρασκευάστηκαν έως το μέγεθος 40/.04. Τα δοκίμια εμφράχθηκαν με γουταπέρκα/AH 26 (Ομάδα 1), γουταπέρκα/TotalFill BC Sealer (Ομάδα 2), γουταπέρκα/BioRoot RCS (Ομάδα 3). Έγινε επανάληψη των ενδοδοντικών θεραπειών με το σύστημα μηχανοκίνητων ρινών Protaper Universal Retreatment και διεύρυνση του ριζικού σωλήνα έως 50/.04. Μετρήθηκε η ικανότητα επαναπρόσβασης στο μήκος εργασίας και η επαναπόκτηση ακρορριζικής διαβατότητας. Επιπλέον, τα δείγματα εξετάστηκαν κάτω από το ηλεκτρονικό μικροσκόπιο σάρωσης, με σκοπό την αξιολόγηση του εναπομείναντος εμφρακτικού υλικού. Οι έλεγχοι πραγματοποιήθηκαν με το λογισμικό SPSS 20.0 και το επίπεδο στατιστικής σημαντικότητας τέθηκε για P <0.05. Αποτελέσματα: Δεν υπήρξε στατιστικά σημαντική διαφορά σχετικά με το ποσοστό του εναπομείναντος εμφρακτικού υλικού (Kruskal Wallis test, P >0.05) και αναφορικά με την επαναπόκτηση ακρορριζικής διαβατότητας και επαναπρόσβασης στο μήκος εργασίας (Fisher’s exact test, P =1.00) μεταξύ των τριών υλικών. Συμπεράσματα: Εναπομείναν εμφρακτικό υλικό παρατηρήθηκε σε όλα τα δείγματα ανεξάρτητα από το φύραμα που χρησιμοποιήθηκε. Τα εμφρακτικά υλικά αφαιρέθηκαν στον ίδιο βαθμό σε όλες τις ομάδες.
description: Aim: To evaluate the residual filling material and the reestablishment of working length and apical patency after retreatment of BioROOT RCS, versus Totalfill BC Sealer and AH26, used in a single cone obturation technique. Materials and Methods: Sixty single-rooted permanent canines were instrumented up to size 40/.04. The samples were filled with GP/AH26 (Group 1), GP/Totalfill BC Sealer (Group 2), GP/ BioROOT RCS (Group 3). Canals were retreated using the Protaper Universal retreatment files and further instrumented up to size 50/.04. The ability to reestablish working length and apical patency were recorded. Furthermore, the samples were observed under a scanning electron microscope (SEM), in order to evaluate the residual filling material. Data were analyzed statistically with the Fisher’s exact (P =1.00) and the Kruskal-Wallis tests (P
FEM investigation of leaky modes in hollow core photonic crystal fibers
Creators: name: Pomplun, J.
name: Holzlöhner, R.
name: Burger, S.
name: Zschiedrich, L.
name: Schmidt, F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Optics (physics.optics)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Hollow-core holey fibers are promising candidates for low-loss guidance of light in various applications, e.g., for the use in laser guide star adaptive optics systems in optical astronomy. We present an accurate and fast method for the computation of light modes in arbitrarily shaped waveguides. Maxwell's equations are discretized using vectorial finite elements (FEM). We discuss how we utilize concepts like adaptive grid refinement, higher-order finite elements, and transparent boundary conditions for the computation of leaky modes in photonic crystal fibers. Further, we investigate the convergence behavior of our methods. We employ our FEM solver to design hollow-core photonic crystal fibers (HCPCF) whose cores are formed from 19 omitted cladding unit cells. We optimize the fiber geometry for minimal attenuation using multidimensional optimization taking into account radiation loss (leaky modes).
description: 8 pages
Heavy Quark Energy Loss Through Soft QCD Scattering in the QGP
Creators: name: Zapp, Korinna
name: Ingelman, Gunnar
name: Rathsman, Johan
name: Stachel, Johanna
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A strong suppression of non-photonic electrons in Au+Au collisions is observed at RHIC. This is in disagreement with the expected dominance of the energy loss via gluon radiation, which predicts a much weaker suppression of heavy flavours due to the dead cone effect. However, collisional energy loss is also important, as demonstrated recently by the Soft Colour Interaction Jet Quenching model. Based on this model we show that collisional energy loss of charm quarks gives a suppression of electrons of the observed magnitude, but the contribution from beauty decays, which dominates at intermediate and large pT, results in a somewhat weaker overall suppression of electrons than observed.
description: 6 pages, 4 figures, to be published in the poster proceedings of the 19th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions (QM2006), Shanghai, China, November 14-20, 2006
Ο Αυτισμός στη βρεφονηπιακή ηλικία. Δεδομένα από αφηγήσεις γονιών
Creators: name: Σεβασλίδου, Ησαΐα Ηλία
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Αυτισμός
Βρεφική ηλικία
Γονείς
Autism
Infancy
Parents

description: Σκοπός της παρούσας εργασίας είναι να δούμε τα σημεία του αυτισμού ,όπως αυτά εξελίσσονται κατά την βρεφονηπιακή ηλικία μέσα από μαρτυρίες των γονιών τους. Στην έρευνα συμμετείχαν τριάντα γονείς, τριάντα ένα παιδιών με αυτισμό(δυο από αυτά είναι αδέρφια) ,τα οποία σήμερα είναι έφηβοι και ενήλικες .Οι πλειοψηφία των γονιών είχαν απευθυνθεί στην Παιδοψυχιατρική Υπηρεσία του ΑΧΕΠΑ για μια πρώτη εκτίμηση , αφού είχαν παρατηρήσει ότι τα παιδιά τους είχαν κάποιες σοβαρές δυσκολίες . Μετά την ολοκλήρωση της διαγνωστικής διαδικασίας, τα παιδιά αυτά φάνηκε να παρουσιάζουν Διαταραχές στο φάσμα του αυτισμού. Οι γονείς αυτοί κλήθηκαν να αναπτύξουν ελεύθερα το ιστορικό του παιδιού τους μέσω ημιδομημένης συνέντευξης. Από τις συνεντεύξεις των γονιών προέκυψαν σημαντικές αναφορές σχετικά με την εγκυμοσύνη και το περιγεννητικό ιστορικό των παιδιών τους. Επίσης σημαντικές ήταν οι πληροφορίες που έδωσαν σχετικά με την πρώιμη αλληλεπίδραση και την συμπεριφορά του παιδιού , τα πρώτα σημεία και συμπτώματα που τους ανησύχησαν, καθώς και την πορεία της κατάστασης έως το τέλος της νηπιακής ηλικίας . Τέλος ιδιαίτερο ενδιαφέρον παρουσιάζουν τα συναισθήματα και οι δυσκολίες τις οποίες αντιμετώπισαν οι γονείς ,συνοδεύοντας τα παιδιά τους σε αυτό το δύσκολο ταξίδι.
description: The purpose of this research work is to describe the evolution of autism’s signs during pre-school based on their parents’ testimonies. In our study participated thirty parents of thirty one children with autism (two of them were brothers). Nowadays, the considered children have grown up and they are considered either teenagers or adults.Initially, the majority of the parents, after noticing that their children faced some serious difficulties, approached the AHEPA Child Psychiatric Service for a first assessment. The outcome of the initial diagnostic process indicated that these children appeared to have Autistic Spectrum Disorders.Then, their parents were interviewed in order to provide their child’s history, through a semi-structured interview. Parent’s interviews provided important information about pregnancy, prenatal history, early interactions and behavior of their children, the first signs and symptoms that worried them and the development of autism throughout children’s infancy. Finally, the difficulties that the parents were faced with as well as their sentimental state during the growing up of their autistic children are also presented.
Directional Sparse Filtering using Weighted Lehmer Mean for Blind Separation of Unbalanced Speech Mixtures
Creators: name: Watcharasupat, Karn
name: Nguyen, Anh H. T.
name: Ooi, Ching-Hui
name: Khong, Andy W. H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Machine Learning (cs.LG)
subject: Sound (cs.SD)
subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: In blind source separation of speech signals, the inherent imbalance in the source spectrum poses a challenge for methods that rely on single-source dominance for the estimation of the mixing matrix. We propose an algorithm based on the directional sparse filtering (DSF) framework that utilizes the Lehmer mean with learnable weights to adaptively account for source imbalance. Performance evaluation in multiple real acoustic environments show improvements in source separation compared to the baseline methods.
description: (c) 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works
Inclusive Semi-leptonic B Decays to order 1/m_b^4
Creators: name: Dassinger, Benjamin M.
name: Mannel, Thomas
name: Turczyk, Sascha
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We give a systematic way to compute higher orders in the 1/m_b expansion in inclusive semi-leptonic decays at tree level. We reproduce the known 1/m_b^3 terms and compute the 1/m_b^4 terms at tree level. The appearing non-perturbative parameters and the impact on the determination of V_{cb} are discussed.
description: 23 pages, 3 figures, uses phystex.sty
Holographic dark energy in Brans-Dicke theory
Creators: name: Banerjee, Narayan
name: Pavon, Diego
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this Letter it is shown that when the holographic dark energy is combined with the Brans-Dicke field equations the transition from decelerated to accelerated expansion of the Universe can be more easily accounted for than when resort to the Einstein field equations is made. Likewise, the coincidence problem of late cosmic acceleration gets more readily softened.
description: 12 pages, version to match published paper
A Payne-Weinberger eigenvalue estimate for wedge domains on spheres
Creators: name: Ratzkin, Jesse
name: Treibergs, Andrejs
Publisher: name: arXiv
Year: 2008
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35P15

description: A Faber-Krahn type argument gives a sharp lower estimate for the first Dirichlet eigenvalue for subdomains of wedge domains in spheres, generalizing the inequality in the plane, found by Payne and Weinberger. An application is an alternative proof to the finiteness of a Brownian motion capture time estimate.
description: 10 pages
Gaussian Process Reconstruction of Reionization History
Creators: name: Krishak, Aditi
name: Hazra, Dhiraj Kumar
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We reconstruct the history of reionization using Gaussian process regression. Using the UV luminosity data compilation from Hubble Frontiers Fields we reconstruct the redshift evolution of UV luminosity density and thereby the evolution of the source term in the ionization equation. This model-independent reconstruction rules out single power-law evolution of the luminosity density but supports the logarithmic double power-law parametrization. We obtain reionization history by integrating ionization equations with the reconstructed source term. Using optical depth constraint from Planck Cosmic Microwave Background observation, measurement of UV luminosity function integrated till truncation magnitude of -17 and -15, and derived ionization fraction from high redshift quasar, galaxies and gamma-ray burst observations, we constrain the history of reionization. In the conservative case we find the constraint on the optical depth as $τ=0.052\pm0.001\pm0.002$ at 68% and 95% confidence intervals. We find the redshift duration between 10% and 90% ionization to be $2.05_{-0.21-0.30}^{+0.11+0.37}$. Longer duration of reionization is supported if UV luminosity density data with truncation magnitude of -15 is used in the joint analysis. Our results point out that even in a conservative reconstruction, a combination of cosmological and astrophysical observations can provide stringent constraints on the epoch of reionization.
description: 10 pages, 4 figures and 1 table
Minimal length implications on the Hartree-Fock theory
Creators: name: Sabet, M. Mohammadi
name: Moradpour, H.
name: Bahadoran, M.
name: ziaie, Amir Hadi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Hartree-Fock approximation suffers from two inabilities including i) the divergence of electron Fermi velocity , and ii) existence of bandwidth not confirmed experimentally. Here, we study the effects of minimal length on the ground state energy of the electron gas in the Hartree-Fock approximation. Our results indicate that considering some mathematical terms, similar to those of used for the minimal length correction to the Hamiltonian of system, can eliminate the weaknesses of Hartree-Fock approximation. These corrections, on the other hand, can be considered as relativistic corrections of electron in solids. Physically, it is obtained that electrons in metals can be employed to test the quantum gravity scenario, if the value of its parameter ($β$) lies within the range of 2 to 10, depending on the used metal. Indeed, the latter addresses an upper bound on $β$ which is comparable with previous works meaning that these types of systems may be employed in testing quantum gravity scenarios. To overcome the infinite Fermi velocity in Hartree-Fock method, the screening potential is used based on the Lindhard theory. We also found that considering the generalized Heisenberg uncertainly leads to some additional oscillating terms in the Friedel oscillations.
description: 10 pases, 5 figs
Η διόρθωση των σφαλμάτων που αφορούν σε γεωμετρικά στοιχεία των πρώτων κτηματολογικών εγγραφών
Creators: name: Ταρνατώρος, Πέτρος Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Γεωμετρικά στοιχεία
Σφάλματα Πρώτων Εγγραφών
Διόρθωση
Geometric data
Errors concerning initial registrations
Correction

description: Σκοπός της διπλωματικής εργασίας ήταν η μελέτη του τρόπου διόρθωσης των σφαλμάτων που αφορούν σε γεωμετρικά στοιχεία των πρώτων εγγραφών. Για το λόγο αυτό παρατέθηκε η έννοια των γεωμετρικών χαρακτηριστικών των ακινήτων, καθώς και των γεωμετρικών μεταβολών και εξετάστηκε η σύνδεση της διόρθωσης των σφαλμάτων που αφορούν σε γεωμετρικά στοιχεία των ακινήτων με την υπηρέτηση των αρχών λειτουργίας και την εκπλήρωση των σκοπών του Εθνικού Κτηματολογίου. Η διπλωματική εργασία εξέτασε αρχικά την εξωδικαστική διαδικασία διόρθωση αυτών των σφαλμάτων, όπως πρα- γματώνεται με απόφαση του Προϊσταμένου του οικείου Κτηματολογικού Γρα- φείου και, στη συνέχεια, τη δικαστική διαδικασία διόρθωσής τους, η οποία λαμβάνει χώρα με την άσκηση ένδικου βοηθήματος και την έκδοση δικαστικής απόφασης. Τέλος, προτάθηκαν νομοθετικές τροποποιήσεις, με τις οποίες βελτιώνεται και απλοποιείται η διαδικασία διόρθωσης των σφαλμάτων που αφορούν σε γεωμετρικά στοιχεία των ακινήτων προς όφελος του Έλληνα πολίτη.
description: The aim of the present thesis was the study of correction of initial registrations’ geometric data. For this purpose it was cited the meaning of spatial elements that constitute real property and the meaning of spatial changes and it was examined the connection between the correction of initial registrations’ geometric data, the serving of fundamental principles and the fulfillment of goals of National Cadastre. The present thesis examined at first the administrative correction of initial registrations’ geometric data by the Head of the Cadastral Office and subsequently the judicial correction of these errors by legal action and judicial decision. Finally, legislative amendments were proposed towards the improvement and simplification of the procedures concerning the correction of initial registrations’ geometric data in the interest of Greek citizens.
Microbiology of the built environment: The changing microbiome of New York City College of Technology
Creators: name: Smyth, Davida
Publisher: name: F1000Research
Year: 2015

description: There is much interest in understanding what constitutes the microbiome of buildings. The surfaces of buildings can often harbor pathogens, acting as fomites, capable of transmitting pathogens to hands. A better understanding of how bacteria transmit from surfaces to human hands would reveal insights into how bacteria prevail and persist in the environment potentially enabling better surveillance and prevention of the dissemination of community-associated and hospital associated bacteria.

To address these questions, we have been sampling the biodiversity of a particular genus of bacteria, the Staphylococci, in our academic building over three semesters. We have focused our sampling on elevator buttons of the NAMM building, composed of 11 floors. Each button was sampled using a chromogenic contact plate, selective for antibiotic resistant Staphylococci on a single day at the same time to get a snapshot of circulating Staphylococci. Presumptive Staphylococci were sub-cultured, DNA was extracted and subjected to PCR and sequencing to identify the species. We have also surveyed for total bacterial load using metagenomics in occupied and non-occupied buildings of CUNY. Our poster shall describe our findings to date and reveal insights into the non- and potentially-pathogenic microbial residents of our campus.
A Potts model for the distortion transition in LaMnO$_3$
Creators: name: Ahmed, Mahrous R.
name: Gehring, G. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The Jahn-Teller distortive transition of \lmo is described by a modified 3-state Potts model. The interactions between the three possible orbits depends both on the orbits and their relative orientation on the lattice. Values of the two exchange parameters which are chosen to give the correct low temperature phase and the correct value for the transition temperature are shown to be consistent with microscopy theory. The model predicts a first order transitions and also a value for the entropy above the transition in good agreement with experiment. The theory with the same parameters also predicts the temperature dependence of the order parameter of orbital ordering agreeing well with published experimental results. Finally, the type of the transition is shown to be close to one of the most disordered phases of the generalised Potts model. The short range order found experimentally above the transition is investigated by this model.
description: 16 pages, 7 figures and no tables. Re-submitted to Phys. Rev. B
The effects of eccentricity and separation on interocular positional judgements in amblyopia
Creators: name: Hussain, Zahra
name: McGraw, Paul
name: Webb, Ben
Publisher: name: F1000Research
Year: 2015

description: We show that amblyopes' positional judgements are disproportionately worse than normal not just near the fovea, but at small stimulus separations anywhere in the visual field (up to 7 deg here). This is unlike normal subjects who are more accurate (and precise) at small stimulus separations. We suggest that the separation deficit in amblyopes may be associated with interocular suppression outside the immediate foveal region (both monocular and dichoptic conditions were tested; see poster for details).
Ο Πελοποννησιακός Πόλεμος: Προεπισκόπηση με Ν-grams & Παραγοντική Ανάλυση
Creators: name: Koutsoupias, Nikos
name: Mikelis, Kyriakos
Publisher: name: Zenodo
Year: 2023

description: 10o Συνέδριο Ελληνικής Εταιρίας Ανάλυσης Δεδομένων / Θεσσαλονίκη 2019

Ο Πελοποννησιακός Πόλεμος:Προεπισκόπηση με Ν-grams & ΠαραγοντικήΑνάλυσηΝικόλαος Κουτσουπιάς & Κυριάκος ΜικέληςΠανεπιστήμιο Μακεδονίας
Developing a programme to educate archivists in Sri Lanka
Creators: name: Samarasinghe, Nayani
Publisher: name: University of British Columbia
Year: 2009

description: This study investigates the possibilities of educating and training archivists in Sri Lanka. It aims to determine the viability of educating archivists and to propose the location, requirements, and curriculum suitable to the Sri Lankan circumstance. The first part of the study examines aspects of the Sri Lankan context that affect the question of archival education, in particular the constitutional and political evolution of the country, the history of its archives and their preservation and treatment, together with an account of past education and training of archivists and records personnel. It then synthesizes the international literature on archival education in order to see the various patterns of education which have emerged the world over in order to reflect on the best model for Sri Lanka. Although aspects of several different patterns are applicable to the Sri Lankan situation, it is proposed a programme of studies in purely professional areas should be located in a Sri Lankan university, in a manner more and more becoming the norm the world over. This literature also identifies certain issues of location in the university and related to the curriculum which are addressed in later chapters. The next two chapters support the idea of establishing a diploma prograirane at the post-graduate level lasting one year and located in conjunction with library and information studies. The particular requirements of Sri Lanka are taken into account, but international trends and standards are also observed. The study concludes that it is both possible and desirable to take a gradualist approach by first building a diploma program of purely professional courses to educate archivists and records personnel for both public and private employment in the Sri Lankan context.
Single-shot discrimination of coherent states beyond the standard quantum limit
Creators: name: Thekkadath, G. S.
name: Sempere-Llagostera, S.
name: Bell, B. A.
name: Patel, R. B.
name: Kim, M. S.
name: Walmsley, I. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The discrimination of coherent states is a key task in optical communication and quantum key distribution protocols. In this work, we use a photon-number-resolving detector, the transition-edge sensor, to discriminate binary-phase-shifted coherent states at a telecom wavelength. Owing to its dynamic range and high efficiency, we achieve a bit error probability that unconditionally exceeds the standard quantum limit (SQL) by up to 7.7 dB. The improvement to the SQL persists for signals containing up to approximately seven photons on average and is achieved in a single shot (i.e. without measurement feedback), thus making our approach compatible with larger bandwidths.
description: 4 pages, 3 figures
Coherent spin dynamics in quantum wells in quantizing magnetic field
Creators: name: Sherman, E. Ya.
name: Sipe, J. E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We investigate theoretically the coherent longitudinal and transversal spin relaxation of photoexcited electrons in quantum wells in quantized magnetic fields. We find the relaxation time for typical quantum well parameters between 100 and 1000 ps. For a realistic random potential the relaxation process depends on the electron energy and g-factor, demonstrating oscillations in the spin polarization accompanying the spin relaxation. The dependence of spin relaxation on applied field, and thus on the corresponding "magnetic" length, can be used to characterize the spatial scale of disorder in quantum wells.
description: 13 pages, 4 figures
Rethinking poverty and peasant in Vietnam after revolution and war
Creators: name: Nguyen-Marshall, Van
Publisher: name: University of British Columbia
Year: 2009

description: A discussion of rural poverty necessarily involves two slippery concepts: that of the peasant and that of poverty. The early 1970s marked the beginning of renewed interest among Western scholars in uncovering the nature of the peasantry. Their efforts focused on how to define the peasants as well as how to evaluate their behaviour. Today the debate between the "moral economist" and the "rational peasant" schools remains controversial. And as for poverty itself, there is no agreement among sociologists as to what is poverty and why poverty exists in almost all societies throughout time. This M.A. thesis will examine the plight of Vietnamese intellectuals in post-revolutionary (1954) Vietnam in their attempt to solve rural poverty. Similar to Western sociologists, Vietnamese thinkers are in a quandary about the problem of poverty. The definition and solutions are not conclusive, and they change with the political climate. For the Vietnamese, however, the re-assessment of rural poverty presents a graver consequence: the re-defining of the nature of the peasantry. It is no longer satisfactory to view the peasants as the embodiment of communalistic traditions; the Vietnamese thinkers are conceding that perhaps there was never any innate qualities about the peasants that made them more inclined toward collectivization rather than private ownership. In effect, the re-evaluation of the nature of the peasantry is a challenge to theraison d'être of the Vietnamese Socialist program and ultimately, the Socialist Revolution itself.
Anisotropy of Solar-Wind Turbulence in the Inner Heliosphere at Kinetic Scales: PSP Observations
Creators: name: Duan, Die
name: He, Jiansen
name: Bowen, Trevor A.
name: Woodham, Lloyd D.
name: Wang, Tieyan
name: Chen, Christopher H. K.
name: Mallet, Alfred
name: Bale, Stuart D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Space Physics (physics.space-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The anisotropy of solar wind turbulence is a critical issue in understanding the physics of energy transfer between scales and energy conversion between fields and particles in the heliosphere. Using the measurement of \emph{Parker Solar Probe} (\emph{PSP}), we present an observation of the anisotropy at kinetic scales in the slow, Alfvénic, solar wind in the inner heliosphere. \textbf{The magnetic compressibility behaves as expected for kinetic Alfvénic turbulence below the ion scale.} A steepened transition range is found between the inertial and kinetic ranges in all directions with respect to the local background magnetic field direction. The anisotropy of $k_\perp \gg k_\parallel$ is found evident in both transition and kinetic ranges, with the power anisotropy $P_\perp/P_\parallel > 10$ in the kinetic range leading over that in the transition range and being stronger than that at 1 au. The spectral index varies from $α_{t\parallel}=-5.7\pm 1.0$ to $α_{t\perp}=-3.7\pm 0.3$ in the transition range and $α_{k\parallel}=-3.12\pm 0.22$ to $α_{k\perp}=-2.57\pm 0.09$ in the kinetic range. The corresponding wavevector anisotropy has the scaling of $k_\parallel \sim k_\perp^{0.71\pm 0.17}$ in the transition range, and changes to $k_\parallel \sim k_\perp^{0.38\pm 0.09}$ in the kinetic range, consistent with the kinetic Alfvénic turbulence at sub-ion scales.
description: 4 figures; submitted to apjl
Physics-Aware Downsampling with Deep Learning for Scalable Flood Modeling
Creators: name: Giladi, Niv
name: Ben-Haim, Zvika
name: Nevo, Sella
name: Matias, Yossi
name: Soudry, Daniel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Background: Floods are the most common natural disaster in the world, affecting the lives of hundreds of millions. Flood forecasting is therefore a vitally important endeavor, typically achieved using physical water flow simulations, which rely on accurate terrain elevation maps. However, such simulations, based on solving partial differential equations, are computationally prohibitive on a large scale. This scalability issue is commonly alleviated using a coarse grid representation of the elevation map, though this representation may distort crucial terrain details, leading to significant inaccuracies in the simulation. Contributions: We train a deep neural network to perform physics-informed downsampling of the terrain map: we optimize the coarse grid representation of the terrain maps, so that the flood prediction will match the fine grid solution. For the learning process to succeed, we configure a dataset specifically for this task. We demonstrate that with this method, it is possible to achieve a significant reduction in computational cost, while maintaining an accurate solution. A reference implementation accompanies the paper as well as documentation and code for dataset reproduction.
PROVAT : A Tool for Voronoi Tessellation Analysis of Protein Structures and Complexes
Creators: name: Swanand Gore
name: Burke David
name: Blundell Tom
Publisher: name: F1000Research
Year: 2015

description: Voronoi tessellation has proved to be a useful tool in protein structure analysis. But a versatile, public-domain tool for calculating and visualizing tessellations at various levels of granularities is not available. To meet this requirement, we developed PROVAT, a set of Python scripts, which integrate freely available specialized software (Qhull, Gromacs, Pymol etc.) into a pipeline that can be easily manipulated at command-line or web-server.

A major feature of the tool is flexible definition of sites required as input to tessellation calculation. With PROVAT, it is easy to specify one site per amino acid residue or one site each for mainchain and sidechain, or a site for any other arbitrary atom-group. For each site, it is possible to specify a physicochemical character which is later used for coloring Voronoi faces. If 3 atoms are specified for determining local reference frame for a site, PROVAT can compute orientations of each Voronoi neighbour in that frame. Site-specific information is read from an XML file, hence it is easy to experiment with different tessellation strategies by using different XML specifications. Solvation of a system, vital for reasonable tessellation at the solvent-exposed surface, can be done with Gromacs or by a cubic grid parametrized on protein-solvent and solvent-solvent interatomic distance. The calculation component extracts sites according to XML specification, computes Voronoi polyhedra and neighbour lists, and stores this as a text file and python pickle file. Various styles of text files are provided. The visualization component, a Pymol plug-in, offers a GUI to render the pickle file and enables visual exploration of tessellation. It is possible to visualize individual polyhedra colored according to their neighbours, solvent exposed surfaces and interfaces between protein and other protein/ligand/DNA.

PROVAT source code can be downloaded from http://raven.bioc.cam.ac.uk/~swanand/Provat1, which also provides a webserver for its calculation component, documentation and examples. An application note on this work was recently published in Bioinformatics.
Ionizing radiation injury of the skin: histologic and metabolomic evaluation in the pig as a model for testing the potential benefits of topical treatments for cutaneous radiation injury
Creators: name: Tytell, Michael
name: Robinson, Mac B.
name: Dorand, Jennifer E.
name: Gabard, Alexis R.
name: Hurt, Julie K.
name: Anderson, Andrea M.
name: J. Daniel Bourland
name: Lui, Jie
name: Burnett, Luke R.
Publisher: name: F1000Research
Year: 2015

description: We characterized the gross, histological, and biochemical responses of porcine skin exposed to a range of doses of β-ray and x-ray radiation and followed for up to 70 days. The goal was to validate a detailed, longitudinal model of cutaneous radiation injury correlating the gross, histological and biochemical effects. This model will guide future treatment development and be used for assessing treatment efficacy.
Recursive Relaxation Identification of Linear Multivariable Systems with its Parallel Algorithm
Creators: name: Lu, Mi
Publisher: name: figshare
Year: 2021
Subjects: subject: 80201 Analysis of Algorithms and Complexity
subject: FOS: Computer and information sciences
subject: 80302 Computer System Architecture

description: In this paper, we propose a new method for the identification of discrete-time linear multivariable systems. This method comprises three recursive computation schemesincluding two parameter estimate schemes for both state equation and observation equation, respectively, and the state estimate scheme via Kalman filtering. We call thismethod the recursive relaxation identification, abbreviated as RRI. Compared with the existing methods, the RRI algorithm has advantages of simplification, fast computation,and high efficiency, and is suitable for fast real-time on-line adaptive identification of linear multivariable systems.
Εμπειρική μελέτη μαθησιακής αποτελεσματικότητας ψηφιακού παιχνιδιού Φωτοσύνθεσης
Creators: name: Ιορδανίδου, Σημέλα Παναγιώτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Ψηφιακό παιχνίδι
Φωτοσύνθεση
Ομαδοσυνεργατική συμμετοχή
Digital game
Photosynthesis
Collaborative participation

description: Τα ψηφιακά εκπαιδευτικά παιχνίδια μπορούν να συμβάλουν στην αύξηση της εμπλοκής των μαθητών στην εκπαιδευτική διαδικασία βελτιώνοντας τη μαθησιακή αποτελεσματικότητα σύνθετων διαδικασιών όπως αυτό της φωτοσύνθεσης στον τομέα της βιολογίας. Υπάρχουν πολλές παρανοήσεις για το μηχανισμό της φωτοσύνθεσης και ιδιαίτερα για τον ενεργειακό της ρόλο στην ανάπτυξη των φυτών. Η παρούσα ερευνητική εργασία αποσκοπεί στην εμπειρική μελέτη της μαθησιακής αποτελεσματικότητας ψηφιακού παιχνιδιού φωτοσύνθεσης που σχεδιάστηκε με Unity 3d. Η ενεργή συμμετοχή των μαθητών στο ψηφιακό αυτό παιχνίδι της φωτοσύνθεσης διερευνήθηκε τόσο ατομικά όσο και ομαδοσυνεργτικά σε μαθητές της Α΄ τάξης του Γυμνασίου Ωραιοκάστρου μέσω των επιδόσεων τους. Τα αποτελέσματα ήταν ιδιαίτερα ενθαρρυντικά, οι μαθητές μέσα από τη συμμετοχή στο ψηφιακό αυτό παιχνίδι κατανόησαν τον ενεργειακό της ρόλο, η δε ομαδική συμμετοχή ενίσχυσε τη μαθησιακή αποτελεσματικότητα του παιχνιδιού και κατέδειξε την ουσιαστική συμβολή της ομαδοσυνεργατικής μάθησης. Ως προς την εκπαιδευτική αξιοποίηση του το ψηφιακό αυτό παιχνίδι θα μπορούσε να αποτελέσει ένα σημαντικό μαθησιακό εργαλείο προς τους μαθητές για την προώθηση της κατανόησης του ενεργειακού ρόλου της φωτοσύνθεσης.
description: Educational digital games can contribute to the increase of student’s engagement in the learning process by enhancing the learning efficiency of complex processes such as photosynthesis. In the sector of biology there are many misconceptions about the mechanism of photosynthesis and especially about its energy role in plant growth. This research aims at the empirical study of the learning efficiency of the digital photosynthesis game designed with Unity 3d. Students' active in the mechanism of photosynthesis has been explored both individually and collectively through their performance in the environment of first grade of junior high school in Oraiokastro. The results were particularly encouraging students through their active participation in the digital game of photosynthesis understood its energy role, whereas group participation enhanced the learning effectiveness of the game and at the same time demonstrated the essential contribution of collaborative learning. In terms of educational use, this digital game could be a particularly important learning tool for students to promote understanding of the energy role of photosynthesis.
description: Σε συνεργασία με: Παιδαγωγικό Δημοτικής Εκπαίδευσης (Πανεπιστήμιο Ιωαννίνων)
Automated lesion delineation using advanced normalization and image intensity histogram matching

Creators: name: Herron, Timothy
name: Schendel, Krista
name: And Turken
Publisher: name: F1000Research
Year: 2015

description: Accurate automated lesion delineation can assist expert lesion characterization or can be used alone in group studies with sufficient patient numbers. We have developed a method of lesion delineation using robust spatial normalization, histogram-based image intensity matching, and comparisons of patient scans to those of controls or to the patients’ healthy hemispheres. We tested the method's specificity and sensitivity as applied to T1, T2, and diffusion images (Fractional Anisotropy & Mean Diffusivity) against a gold standard of expert delineated lesion boundaries.  The method has good median and mean sensitivity and specificity, 90+% median accuracy when allowing for 5% false positives, but it is strongly discrepant with manual reconstruction in ~10% of cases and can occasionally mark healthy areas as lesioned from brain displacement due to distant lesions. Finally, using patients' healthy hemispheres as a control via symmetric templates may improve sensitivity as there were fewer case of poor performance than when using control subjects (i.e. medians were higher) with similar mean performance while requiring less smoothing.