cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Απομάκρυνση μελανοϊδινών από πραγματικό υγρό απόβλητο βιομηχανίας ζυμών μέσω της προσρόφησης
Creators: name: Μιρκοπούλου, Ζωή-Ουρανία Σταύρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Μελανοϊδίνες
Προσρόφηση
Απόβλητα βιομηχανίας ζυμών
Melanoidin
adsorption
baker’s yeast wastewater

description: Οι μελανοϊδίνες είναι αζωτούχα βιοπολυμερή καστανού χρώματος που υπάρχουν στα απόβλητα βιομηχανιών παραγωγής ζύμης αρτοποιίας, οι οποίες χρησιμοποιούν ως πρώτη ύλη τη μελάσα. Σκοπός της παρούσας μελέτης είναι η απομάκρυνση των μελανοϊδινών από πραγματικά υγρά απόβλητα βιομηχανίας ζυμών(κατεργασμένα και ακατέργαστα) μέσω της προσρόφησης. Η προσρόφηση πραγματοποιήθηκε με χρήση των Macrosorb III (RTW Development Ltd) και Sevelamer (Formosa Laboratories). Η μέτρηση του χρωματικού περιεχομένου των αποβλήτων έγινε σε μονάδες ADMI και οι παράγοντες που μελετήθηκαν είναι: η ποσότητα των προσροφητικών, το ρΗ, ο χρόνος ανάμιξης, και η αναγέννηση των προσροφητικών χρησιμοποιώντας διαφορετικές συγκεντρώσεις HCL και NaΟΗ. Τα αποτελέσματα δείχνουν ότι o αποχρωματισμός των δύο αποβλήτων (βιολογικά κατεργασμένα και ακατέργαστα) ευνοείται σε όξινο περιβάλλον. Ο χρόνος επαφής που απαιτείται για την προσρόφηση είναι 15 λεπτά. Ο αποχρωματισμός και των δύο αποβλήτων ήταν σχεδόν 80% με χρήση [Macrosorb III]= 12 g/L σε ρΗ=4 και 90% με χρήση [Sevelamer]=8 g/L σε ρΗ=6. Μετά την προσρόφηση, τα φορτωμένα με τις μελανοϊδίνες προσροφητικά πλύθηκαν με διάλυμα ΝaΟΗ και πρόεκυψε ικανοποιητική ανάκτηση των μελανοϊδινών (~70%).
description: Melanoidins are nitrogenous brown biopolymers present in the wastewaters of fermentation industries that use molasses as feedstock. In this study, recovery of melanoidin from real untreated and treated molasses wastewaters was investigated by adsorption on Macrosorb III (RTW Development Ltd) and on Sevelamer (Formosa Laboratories). The studied operating variables, based on the maximum removal of color expressed in ADMI units, were sorbents dosage, pH, mixing time and the regeneration of sorbents using different concentrations of HCl and NaΟΗ. The results show that the decolorization of two samples (biologically treated and untreated) is favoured in alcalic environment. The contact time needed for adsorption is 15 min. Decolorization of all two samples exceeded 80% by employing [Macrosorb III]=12 g/L and pH=4 and 90% by employing [Sevelamer]=8 g/L and pH=6. After adsorption, melanoidin loaded Macrosorb III and Sevelamer was washed with NaOH solutions resulting a reasonable melanoidin recovery (70 %).
Collider Signatures of Singlet Extended Higgs Sectors
Creators: name: Barger, Vernon
name: Langacker, Paul
name: Shaughnessy, Gabe
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We explore the collider signatures of the Higgs sectors in singlet-extended MSSM models. We find that even with reduced couplings due to singlet mixing, a significant portion of the parameter spaces have a discoverable Higgs via traditional decay modes or via invisible decays (directly to neutralinos or through cascade decays to neutralinos and neutrinos). For illustrative points in parameter space we give the likelihood of Higgs discovery. In cases where neither traditional nor invisible modes can discover the Higgs, the neutralino sector may provide evidence for the extended models.
description: 21 pages, 8 figures. v2: Refs added
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the wreck of the Maid of Meirion (MADU Ref: 333)
Creators: name: James, Gwyneth M
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: Maid of Meirion was Aberystwyth built and owned throughout her working life. Her history demonstrates more than 40 years under sail carrying a variety of the items which underpinned the industrial wealth of Wales at the time. Cargoes of slate, coal, iron and copper are all recorded before she was finally abandoned on Maen Bugail, Bardsey Island.
Effects of exchange distortions in the magnetic Kagome lattice
Creators: name: Coker, A. A.
name: Saxena, A.
name: Haraldsen, J. T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: This study examines the effect of distorted triangular magnetic interactions in the Kagome lattice. Using a Holstein-Primakoff expansion, we determine the analytical solutions for classical energies and the spin-wave modes for various magnetic configurations. By understanding the magnetic phase diagram, we characterize the changes in the spin waves and examine the spin distortions of the ferromagnetic (FM), Antiferrimagnetic (AfM), and 120$^{\circ}$ phases that are produced by variable exchange interactions and lead to various non-collinear phases, which provides a deeper understanding of the magnetic fingerprints of these configurations for experimental characterization and identification.
description: 17 Pages, 13 Figures, Submitted for Publication
The Remarkable 60 x 2 kpc Optical Filament Associated with a Poststarburst Galaxy in Coma Cluster
Creators: name: Yagi, Masafumi
name: Komiyama, Yutaka
name: Yoshida, Michitoshi
name: Furusawa, Hisanori
name: Kashikawa, Nobunari
name: Koyama, Yusei
name: Okamura, Sadanori
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In the deep narrow band image of the Coma Cluster taken with Suprime-Cam of the Subaru telescope, we found an extremely long and narrow (~ 60 kpc x 2 kpc) Halpha emitting region associated with a poststarburst galaxy (D100). Follow up spectroscopy shows that the region has the same redshift as D100. The surface brightness of the region is typically 25 mag(AB) arcsec^-2 in Halpha, which corresponds to 0.5--4x10^-17 erg s^-1 cm^-2 arcsec^-2. We set two possible explanations for the origin of the region; gas stripped off from a merged dwarf, or gas stripped off from D100 by ram pressure. Either scenario has difficulty to fully explain all the observed characteristics of the region.
description: 6 pages, 9 figures, accepted for publication in ApJ
Hospital governance in British Columbia
Creators: name: Azad, Pamela Ann
Publisher: name: University of British Columbia
Year: 2009

description: This study examined hospital governance in British Columbia. Considered to be one of the most important issues facing the health care industry today, hospital governance is nevertheless an ill-defined and poorly understood concept. Foundational and exploratory in nature, the study’s primary objectives were: a) to define hospital governance within the context of British Columbia; b) to examine the structural and functional relationships among key participants; c) to investigate decision-making responsibilities; d) to investigate what, if any, variations exist in the governance of acute care, long term care, and specialized care hospitals; and e) to explore the critical issues which face hospital governance today and in the future under New Directions policy initiatives. All hospitals (N=107) in the province were studied, with the exception of diagnostic treatment centers, private for-profit facilities, military, and federal institutions. Utilizing documentary examination, survey administration, and interview techniques, the study included hospital chief executive officers (N=106), hospital board members (N=735), hospital board chairs (N=106), and selected high ranking senior officials from the Ministry of Health who had direct responsibility for hospital activities (N=15). Results of the study provide for in-depth demographic board profiles, and show that hospital governance is similarly defined across all hospital categories as “a complex relationship of overlapping structures and activities which has the responsibility and the authority to oversee the organization’s operation and to ensure its commitment of providing optimum health care to its residents.” The study identifies the key participants of hospital governance and delineates sixteen activities considered to be under the hospital board’s domain. Seven issues are identified as being critical for hospital governance in the future. Although there was general agreement as to the individuals most often responsible for recommending and implementing activities brought before the board, there were considerable perceptual differences between participants as to who possesses final decision-making responsibility. Data results consistently demonstrated important differences in responses between the hospital and Ministry populations. The study shows that overall, the participants of hospital governance are generally satisfied with the traditional roles and structures of hospital boards and are overwhelmingly dissatisfied with New Directions policy initiatives. This study further suggests that due to the discrepancies in priorities, perceptions, and ideologies of the hospital and Ministry populations, hospital governance is in a highly volatile and transitive state.
Unquenched complex Dirac spectra at nonzero chemical potential: two-colour QCD lattice data versus matrix model
Creators: name: Akemann, G.
name: Bittner, E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compare analytic predictions of non-Hermitian chiral random matrix theory with the complex Dirac operator eigenvalue spectrum of two-colour lattice gauge theory with dynamical fermions at nonzero chemical potential. The Dirac eigenvalues come in complex conjugate pairs, making the action of this theory real, and positive for our choice of two staggered flavours. This enables us to use standard Monte-Carlo in testing the influence of chemical potential and quark mass on complex eigenvalues close to the origin. We find an excellent agreement between the analytic predictions and our data for two different volumes over a range of chemical potentials below the chiral phase transition. In particular we detect the effect of unquenching when going to very small quark masses.
description: 4 pages, 6 figures; v2: grant no. added
Οι σύλλογοι στην αρχαία Θεσσαλονίκη κατά την αυτοκρατορική περίοδο
Creators: name: Καλαμαρά, Αργυρώ Σωτηρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Σύλλογοι
Θεσσαλονίκη
Αυτοκρατορική περίοδος
Associations
Thessaloniki
Imperial era

description: Η μελέτη των συλλόγων της πόλεως της Θεσσαλονίκης της αυτοκρατορικής περιόδου, επικεντρώνεται σε σαράντα τέσσερις επιγραφές, κυρίως προερχόμενες από επιτύμβια μνημεία του δεύτερου και τρίτου αι. μ.Χ., οι οποίες αναφέρουν συνολικά τριάντα εννέα συλλόγους. Κείμενα μπορεί να προέρχονται και από άλλου είδους επιγραφές όπως τιμητικά ψηφίσματα. Αν και μεθοδολογικά η κατάταξή τους δεν είναι πάντα σαφής, για τη διευκόλυνση της μελέτης τους διακρίνονται σε τέσσερις κατηγορίες, τους θρησκευτικούς και τους επαγγελματικούς συλλόγους, τους οικιακούς και τους συλλόγους των θεαμάτων και της αρένας,. Οι θρησκευτικοί, διακρίνονται για τον ίδιο λόγο, σε συλλόγους που αφορούν θεότητες και τοπικούς ήρωες, ενώ ξεχωριστά αναφέρονται λόγω των ιδιαίτερων χαρακτηριστικών τους οι σύλλογοι των Αιγυπτίων Θεών. Ακολουθούν οι επαγγελματικοί σύλλογοι ενώ εντοπίζονται και πέντε επιγραφικά κείμενα με συλλόγους που δεν εξακριβώνεται η ταυτότητά τους. Ενδιαφέροντα ζητήματα που προκύπτουν από τα επιγραφικά κείμενα είναι ο τρόπος εσωτερικής οργάνωσης και δομής των συλλόγων της πόλης, τα αξιώματα των μελών τους, ο τρόπος εισόδου, τα οικονομικά ζητήματα και το νομικό καθεστώς που τους πλαισίωνε. Επίσης, οι λειτουργίες τους που έχουν να κάνουν με ένα ευρύ φάσμα δραστηριοτήτων ταφικών, λατρευτικών και εορταστικών και κοινωνικών. Τέλος, τα συμπεράσματα που προκύπτουν από τη μελέτη των επιγραφών αυτών βοηθούν στην κατανόηση της θέσης τους στην κοινωνία της Θεσσαλονίκης της αυτοκρατορικής περιόδου.
description: The study of Thessaloniki’s associations of the imperial era involves studying forty- four inscriptions mostly of the second and third centuries C.E.. Most of these inscriptions come from funerary monuments and give evidence for thirty-nine associations. These associations are classified in four categories, religious, professional, household and associations of arena and theatre devotees. The religious associations are classified, in order to be studied, in associations dedicated to deities and local heroes, while the ones dedicated to the Egyptian Gods are being studied apart because of their different organizational characteristics. There are also five epigraphic texts indicating associations which cannot be identified. The study of Thessaloniki’s associations can be rather interesting because of the subjects erased as the internal organization and administration, membership, financial and law issues. In addition, the associational activities are interesting to be studied as they include a wide variety such as funerary activities, memorial celebrations, rituals and banquets. Finally, there are many conclusions, concerning the social as well the political place of the associations of Thessaloniki of the imperial era.
Spin melting and refreezing driven by uniaxial compression on a dipolar hexagonal plate
Creators: name: Matsushita, Katsuyoshi
name: Sugano, Ryoko
name: Kuroda, Akiyoshi
name: Tomita, Yusuke
name: Takayama, Hajime
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigate freezing characteristics of a finite dipolar hexagonal plate by the Monte Carlo simulation. The hexagonal plate is cut out from a piled triangular lattice of three layers with FCC-like (ABCABC) stacking structure. In the present study an annealing simulation is performed for the dipolar plate uniaxially compressed in the direction of layer-piling. We find spin melting and refreezing driven by the uniaxial compression. Each of the melting and refreezing corresponds one-to-one with a change of the ground states induced by compression. The freezing temperatures of the ground-state orders differ significantly from each other, which gives rise to the spin melting and refreezing of the present interest. We argue that these phenomena are originated by a finite size effect combined with peculiar anisotropic nature of the dipole-dipole interaction.
description: Proceedings of the Highly Frustrated Magnetism (HFM2006) conference. To appear in a special issue of J. Phys. Condens. Matter
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the wreck of the: Margaret Lloyd
Creators: name: Perks, Graeme
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: The Margaret Lloyd was built by Thomas Watkins at Aberystwyth for William Lloyd in 1854, and named after his wife. Margaret Lloyd was a dandy rigged smack of 52 tons trading between Wales, England, Scotland, Ireland and France carrying coal or slates outwards and any available cargo onwards. The Margaret Lloyd was sheltering at St Tudwall's Roads when the Royal Charter Storm struck and attempted to enter Aberystwyth harbour at night for refuge, but the guiding lights for the harbour were not lit. Margaret Lloyd was seen signalling for the guiding lights but was forced to seek shelter elsewhere and foundered, off Cardigan Island with the loss of all the crew. An inquiry led to the dismissal of the Aberystwyth harbour master.
Dark matter vs. modifications of the gravitational inverse-square law. Results from planetary motion in the solar system
Creators: name: Sereno, M.
name: Jetzer, Ph.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Dark matter or modifications of the Newtonian inverse-square law in the solar-system are studied with accurate planetary astrometric data. From extra-perihelion precession and possible changes in the third Kepler's law, we get an upper limit on the local dark matter density, rho_{DM} < 3*10^{-16} kg/m^3 at the 2-sigma confidence level. Variations in the 1/r^2 behavior are considered in the form of either a possible Yukawa-like interaction or a modification of gravity of MOND type. Up to scales of 10^{11} m, scale-dependent deviations in the gravitational acceleration are really small. We examined the MOND interpolating function mu in the regime of strong gravity. Gradually varying mu suggested by fits of rotation curves are excluded, whereas the standard form mu(x)= x/(1+x^2)^{1/2} is still compatible with data. In combination with constraints from galactic rotation curves and theoretical considerations on the external field effect, the absence of any significant deviation from inverse square attraction in the solar system makes the range of acceptable interpolating functions significantly narrow. Future radio ranging observations of outer planets with an accuracy of few tenths of a meter could either give positive evidence of dark matter or disprove modifications of gravity.
description: 7 pages, 4 figures, accepted for publication in MNRAS
Light quark energy loss in a soft-wall AdS/QCD model
Creators: name: Zhu, Xiangrong
name: Zhang, Zi-qiang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate the energy loss of light quarks in a holographic QCD model with conformal invariance broken by a background dilaton. We perform the analysis within falling string and shooting string, respectively. It turns out that the two methods give the same result: the presence of chemical potential and confining scale tends to enhance the energy loss, in accord with previous findings of drag force and jet quenching parameter.
description: 6 pages, 4figures
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the wreck of the: Margaretta
Creators: name: Perks, Graeme
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: The Margaretta was a snow built by Thomas Forsythe of South Shields and launched September 1844. In 1846 three of the crew died of scurvy after leaving Africa for Patagonia to load guano. The Margaretta usually sailed to Black sea and Danube ports in Romania via Malta, Constantinople and other ports where the Margaretta delivered coals, returning with wheat, beans, maize, barley or Linseed. The Margaretta lost her mainmast in 1853, off Cape Trafalgar and was repaired at Gibraltar. The Margaretta on passage from Troon to Malta in October 1853 struck St Patricks Causeway in Carnarvon Bay in fog, losing her rudder, drifting towards Pwllheli where the crew abandoned the Margaretta safely, before coming ashore and wrecking.
Heat transport in overdamped quantum systems
Creators: name: Kadijani, Sadeq S.
name: Schmidt, Thomas L.
name: Esposito, Massimiliano
name: Freitas, Nahuel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We obtain an analytical expression for the heat current between two overdamped quantum oscillators interacting with local thermal baths at different temperatures. The total heat current is split into classical and quantum contributions. We show how to evaluate both contributions by taking advantage of the time scale separation associated with the overdamped regime, and without assuming the usual weak coupling and Markovian approximations. We find that non-trivial quantum corrections survive even when the temperatures are high compared to the frequency scale relevant for the overdamped dynamics of the system.
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the wreck of: SS Margarita (Steamship)
Creators: name: Davies, Gareth J.S.
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: This project is to discover information relating to the history of the steamship SS Margarita built at Ailsa Shipbuilding Co. Ltd., Ayr in 1902. On Feb 14 1917, the SS Margarita was stopped by the German U-boat UC-65 approximately 20 miles SW by S of Bardsey Island. The crew was offloaded and the SS Margarita sunk.
The Solar Neighborhood XLVII: Comparing M Dwarf Models with Hubble Space Telescope Dynamical Masses and Spectroscopy
Creators: name: Dieterich, Serge B.
name: Simler, Andrew
name: Henry, Todd J.
name: Jao, Wei-Chun
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We use HST/STIS optical spectroscopy of ten M dwarfs in five closely separated binary systems to test models of M dwarf structure and evolution. Individual dynamical masses ranging from 0.083 to 0.405 Mo for all stars are known from previous work. We first derive temperature, radius, luminosity, surface gravity, and metallicity by fitting the BT-Settl atmospheric models. We verify that our methodology agrees with empirical results from long baseline optical interferometry for stars of similar spectral types. We then test whether or not evolutionary models can predict those quantities given the stars' known dynamical masses and the conditions of coevality and equal metallicity within each binary system. We apply this test to five different evolutionary model sets: the Dartmouth models, the MESA/MIST models, the models of Baraffe et al. 2015, the PARSEC models, and the YaPSI models. We find marginal agreement between evolutionary model predictions and observations, with few cases where the models respect the condition of coevality in a self-consistent manner. We discuss the pros and cons of each family of models and compare their predictive power.
description: Accepted for publication in the Astronomical Journal
Neural Crossbreed: Neural Based Image Metamorphosis
Creators: name: Park, Sanghun
name: Seo, Kwanggyoon
name: Noh, Junyong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Graphics (cs.GR)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We propose Neural Crossbreed, a feed-forward neural network that can learn a semantic change of input images in a latent space to create the morphing effect. Because the network learns a semantic change, a sequence of meaningful intermediate images can be generated without requiring the user to specify explicit correspondences. In addition, the semantic change learning makes it possible to perform the morphing between the images that contain objects with significantly different poses or camera views. Furthermore, just as in conventional morphing techniques, our morphing network can handle shape and appearance transitions separately by disentangling the content and the style transfer for rich usability. We prepare a training dataset for morphing using a pre-trained BigGAN, which generates an intermediate image by interpolating two latent vectors at an intended morphing value. This is the first attempt to address image morphing using a pre-trained generative model in order to learn semantic transformation. The experiments show that Neural Crossbreed produces high quality morphed images, overcoming various limitations associated with conventional approaches. In addition, Neural Crossbreed can be further extended for diverse applications such as multi-image morphing, appearance transfer, and video frame interpolation.
description: 16 pages
Επανατοποθέτηση πόλων στον χώρο των καταστάσεων
Creators: name: Διδασκάλου, Μαριλένα Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Ελεγξιμότητα
Κανονική Μορφή Ελεγξιμότητας
Ανάδραση Κατάστασης
Επανατοποθέτηση Ιδιοτιμών-Ιδιοδιανυσμάτων
Πίνακας Κέρδους
Controllability
Controller Form
State Feedback
Eigenvalue- Eigenstructure Assignment
State Feedback Matrix

description: Στην παρούσα εργασία περιγράφονται μέθοδοι επανατοποθέτησης ιδιοτιμών και ιδιοδιανυσμάτων μέσω ανάδρασης κατάστασης. Σκοπός όλων των μεθόδων είναι ο υπολογισμός ενός πίνακα κέρδους που να επανατοποθετεί όλες τις ιδιοτιμές και τα ιδιοδιανύσματα του κλειστού συστήματος. Κάθε μέθοδος συνοδεύεται από παραδείγματα για τον υπολογισμό του πίνακα κέρδους. Οι παραπάνω μέθοδοι αναλύονται για συστήματα μίας εισόδου αλλά και για συστήματα πολλών εισόδων , τα οποία παρουσιάζουν ιδιαίτερο ενδιαφέρον.Στα πρώτα κεφάλαια της εργασίας παρουσιάζονται κάποιες εισαγωγικές έννοιες καθώς επίσης γίνεται εκτενής αναφορά στις έννοιες της ελεγξιμότητας και των κανονικών μορφών ελεγξιμότητας ενός συστήματος που είναι απαραίτητες για την περιγραφή και την κατανόηση των παραπάνω μεθόδων.Τέλος γίνεται αναφορά εντολών του προγραμματιστικού περιβάλλοντος “ Matlab” και παρουσίαση αλγορίθμων που βοηθούν στον υπολογισμό του πίνακα κέρδους.
description: The specific study analyzes methods for eigenvalue-eigenvector assignment, by state feedback. The main purpose of these methods is the calculation of a state feedback matrix, which will assign all of the eigenvalues-eigenvectors of the closed-loop system. Each method is followed by several examples for the calculation of the state feedback matrix. The above methods are not only relevant to single-input systems, but they-even more- refer to the multi-input case, which requires special attention. In the first unit of the study lies a thorough analysis of several introductory definitions, as well as an extensive report on the concepts of “controllability” and “controller form” of a system, which are indispensible for the description and comprehension of the above methods. Finally, there is a reference to the commands of "Matlab" computing environment and presentation of algorithms that assist in the computation of the state feedback matrix.
How robust are inflation model and dark matter constraints from cosmological data?
Creators: name: Hamann, Jan
name: Hannestad, Steen
name: Sloth, Martin S.
name: Wong, Yvonne Y. Y.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: High-precision data from observation of the cosmic microwave background and the large scale structure of the universe provide very tight constraints on the effective parameters that describe cosmological inflation. Indeed, within a constrained class of LambdaCDM models, the simple lambda phi^4 chaotic inflation model already appears to be ruled out by cosmological data. In this paper, we compute constraints on inflationary parameters within a more general framework that includes other physically motivated parameters such as a nonzero neutrino mass. We find that a strong degeneracy between the tensor-to-scalar ratio r and the neutrino mass prevents lambda phi^4 from being excluded by present data. Reversing the argument, if lambda phi^4 is the correct model of inflation, it predicts a sum of neutrino masses at 0.3-0.5 eV, a range compatible with present experimental limits and within the reach of the next generation of neutrino mass measurements. We also discuss the associated constraints on the dark matter density, the dark energy equation of state, and spatial curvature, and show that the allowed regions are significantly altered. Importantly, we find an allowed range of 0.094 < Omega_c h^2 < 0.136 for the dark matter density, a factor of two larger than that reported in previous studies. This expanded parameter space may have implications for constraints on SUSY dark matter models.
description: 9 pages, 9 figures, references updated
Exact analytical evaluation of time dependent transmission coefficient from the method of reactive flux for an inverted parabolic barrier
Creators: name: Chakrabarti, Rajarshi
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In this paper we derive a general expression for the transmission coefficient using the method of reactive flux for a particle coupled to a harmonic bath surmounting a one dimensional inverted parabolic barrier. Unlike Kohen and Tannor [J. Chem. Phys. 103, 6013 (1995)] we use a normal mode analysis where the unstable and the other modes have a complete physical meaning. Importantly our approach results a very general expression for the time dependent transmission coefficient not restricted to overdamped limit. Once the spectral density for the problem is know one can use our formula to evaluate the time dependent transmission coefficient. We have done the calculations with time dependent friction used by Xie [Phys. Rev. Lett 93, 180603 (2004)] and also the one used by Kohen and Tannor [J. Chem. Phys. 103, 6013 (1995)]. Like the formula of Kohen and Tannor our formula also reproduces the results of transition state theory as well as the Kramers theory in the limits t->0 and t->infinity respectively.
Εισαγωγή στον Εγγραμματισμό για μικρούς μαθητές της Αγγλικής ως Ξένης Γλώσσας: Mια συγκριτική μελέτη Ολιστικής και συστηματικής αναλυτικό-συνθετικής προσέγγισης (Phonics)
Creators: name: Τσιαδήμος, Νικόλαος Σωτηρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Εγγραμματισμός
Αγγλική ως Ξένη Γλώσσα
Αναλυτικο-συνθετική προσέγγιση
Ολιστική προσέγγιση
Literacy
English as a Foreign Language
Phonics-based approach

description: Πλήθος ερευνών έχουν εντοπίσει θετικό συσχετισμό ανάμεσα στην ευχέρεια και ακρίβεια στην μεγαλόφωνη ανάγνωση καθώς και την ικανότητα στην ορθογραφία και την ικανότητα κατανόησης γραπτού λόγου αλλά και την γενικότερη γλωσσική ευχέρεια. Ταυτόχρονα, υπάρχουν πολλές έρευνες που αναφέρουν πλεονεκτήματα στην μεγαλόφωνη ανάγνωση και τις ορθογραφικές δεξιότητες για νεαρούς μαθητές που έχουν την αγγλική ως μητρική γλώσσα καθώς και για μαθητές για τους οποίους η αγγλική είναι δεύτερη γλώσσα και οι οποίοι εισήχθησαν στον εγγραμματισμό μέσω μιας συστηματικής αναλυτικό-συνθετικής προσέγγισης (phonics). Σε αντίθεση, και εξ όσων γνωρίζουμε, δεν έχει προς το παρόν υπάρξει κάποια έρευνα σχετικά με την επίδραση που μπορεί να έχει η εν λόγω μέθοδος διδασκαλίας στην αναγνωστική ικανότητα των μικρών μαθητών της αγγλικής ως ξένης γλώσσας. Η παρούσα έρευνα στόχο έχει να επιβεβαιώσει ευρήματα που αφορούν στην υπεροχή της αναλυτικό-συνθετικής προσέγγισης (phonics) στο περιβάλλον της Πρωτοβάθμιας Εκπαίδευσης στην Ελλάδα. Έτσι, διεξάγουμε μια μέτρηση της ευχέρειας και ακρίβειας στην μεγαλόφωνη ανάγνωση μαθητών που έχουν εκτεθεί στην αναλυτικό-συνθετική μέθοδο (phonics), οι επιδόσεις των οποίων συγκρίνονται με αυτές μαθητών που έχουν εκτεθεί σε διαφορετικές προσεγγίσεις στον εγγραμματισμό. Επιπλέον, οι ίδιοι συμμετέχοντες υποβάλλονται σε δοκιμασία ορθογραφίας για να εντοπιστούν πιθανοί θετικοί συσχετισμοί ανάμεσα στην αναλυτικό-συνθετική διδασκαλία των phonics και τις ορθογραφικές δεξιότητες στην αγγλική.
description: Oral Reading Accuracy and Fluency and spelling competence have consistently been found to correlate positively with overall Reading Competence and language fluency in general. At the same time, there are many studies which report advantages in oral reading fluency and spelling skills for young native speakers of the English language as well as for ESL learners who have been introduced to literacy through systematic phonics approaches. In contrast, and to the best of our knowledge, there has been so far no systematic investigation of the effect of phonics instruction on young EFL learners' early reading abilities. Our proposed study sets to confirm findings concerning the supremacy of the phonics approach over other approaches in the context of primary education in Greece. Reading accuracy and fluency of a phonics group are measured and compared to those of a group exposed to non-phonics approaches. Additionally, a spelling test is administered to the same participants in order to establish any positive links between phonics instruction and performance in English spelling.
Meeting skills demand for data stewardship
Creators: name: Stokes, Liz
Publisher: name: Zenodo
Year: 2019
Subjects: data stewardship
data skills
roles

description: As research data management services evolve across the research sector, data stewardship is itself emerging as signifier of maturity (Cox et al 2017), and unfolding as a multilayered engagement which incorporates data governance, research integrity, repository management, training and advocacy of good data practices as well as technical solutions for the sharing and interoperation of data services globally. For organisations, the scope can increase exponentially, incorporating large scale technical infrastructure, faculty level administrative processes and a multiplicity of roles of people who manage diverse data assets, from research management intelligence to repositories of research data and other primary materials which underpin research. In order to meet the different skill demands across functional requirements of good data stewardship, establishing core competencies and supporting community development can help organisations identify their skill gaps. There are opportunities to use skills training to foster communities of practice which can have far greater impact than the sum of their parts. Pursuing this strategy could strengthen collaborative engagement of a national research data commons to sustain and transform the research sector.
Characterizing (Un)moderated Textual Data in Social Systems
Creators: name: de Lima, Lucas Henrique Costa
name: Reis, Julio
name: Melo, Philipe
name: Murai, Fabricio
name: Benevenuto, Fabricio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: Despite the valuable social interactions that online media promote, these systems provide space for speech that would be potentially detrimental to different groups of people. The moderation of content imposed by many social media has motivated the emergence of a new social system for free speech named Gab, which lacks moderation of content. This article characterizes and compares moderated textual data from Twitter with a set of unmoderated data from Gab. In particular, we analyze distinguishing characteristics of moderated and unmoderated content in terms of linguistic features, evaluate hate speech and its different forms in both environments. Our work shows that unmoderated content presents different psycholinguistic features, more negative sentiment and higher toxicity. Our findings support that unmoderated environments may have proportionally more online hate speech. We hope our analysis and findings contribute to the debate about hate speech and benefit systems aiming at deploying hate speech detection approaches.
description: Accepted to IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining (ASONAM, 2020)
Peculiarities of Abundances of Selected Elements in Metal-Rich Field RR Lyrae Stars
Creators: name: Gozha, M. L.
name: Marsakov, V. A.
name: Koval', V. V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We use the data of our extended catalog of spectroscopic determinations of elemental abundances in the atmospheres of Galactic-field RR Lyrae type variables to show that metal-rich RR Lyraes ($\rm{[Fe/H]} > -1.0$) have anomalous abundances of some elements. In particular, the relative abundances of scandium, titanium, and yttrium in metal-rich RR Lyrae type variables are lower than the corresponding abundances in field stars of similar metallicity beyond the errors. We discuss the errors of the determination of the abundances of the above elements and point out the fact that no europium, zirconium, and lanthanum abundance determinations are available for metal-rich RR Lyrae type variables. We also analyze various possible causes of the observed peculiarities of the chemical composition of metal-rich RR Lyrae type variables.
description: 12 pages, 2 figures, 2 tables
Πολιτικές και οικονομικές πρακτικές πριν την άλωση του Βυζαντίου. Το πρόγραμμα του Γεωργίου Γεμιστού ή Πλήθωνος.
Creators: name: Γεωργακάκης, Γεώργιος Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Γεώργιος Γεμιστός ( Πλήθων )
Μανουήλ Β΄ Παλαιολόγος
Δεσποτάτο Μορέως / Μυστρά
Georgios Gemistos ( Plethon )
Manuel II Paleologus
Despotate of Morea / Mystra

description: Σκοπός της παρούσας μεταπτυχιακής εργασίας ήταν η μελέτη του πολιτικού και οικονομικού προγράμματος, το οποίο ανέπτυξε ο λόγιος Γεώργιος Γεμιστός ( Πλήθων ) με σκοπό την ανασυγκρότηση του Δεσποτάτου του Μορέως προς αντιμετώπιση της οθωμανικής απειλής. Επιπροσθέτως εξετάσαμε συνολικά την πολιτική σκέψη και δράση του λογίου στα κρίσιμα χρόνια πριν από την άλωση της Κωνσταντινούπολης. Παράλληλα αναδείξαμε τον μετασχηματισμό του βυζαντινού κράτους κατά τη συγκεκριμένη περίοδο σε επίπεδο πολιτικό, οικονομικό, κοινωνικό και ιδεολογικό. Ένα άλλο θέμα που θίξαμε ήταν η στάση των Βυζαντινών εν όψει του οθωμανικού κινδύνου και της επερχόμενης πτώσης προβάλλοντας τις ποικίλες πολιτικές λύσεις και τα ιδεολογικά ρεύματα που αναδύθηκαν.
description: The aim of the present postgraduate thesis was the study of the political and economic program, which was presented by the scholar Georgios Gemistos ( Plethon ) with the aim of the reorganization of the Despotate of Morea in order to face the ottoman menace. Moreover we examined the scholar’s political thought and action as a whole during the crucial years before the fall of Constantinople. In parallel we brought to notice the transformation of the byzantine state during this period at political, economic, social and ideological level. We also examined the attitude of Byzantine people towards the ottoman danger and the inevitable state’s fall by presenting the various political solutions and the ideological currents, which came forth.
Ο Σολωμός και η Mεταφυσική. Διερευνώντας τα έργα Κρητικός, Ελεύθεροι Πολιορκημένοι, Πόρφυρας.
Creators: name: Βίτσου, Χαραλαμπία-Ιωάννα Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Σολωμός
Μεταφυσική
Ελευθερία
Solomos
Metaphysics
Freedom

description: Σκοπός της διατριβής ήταν η απόδειξη της βαθιάς σχέσης της ποίησης του Διονυσίου Σολωμού με τη μεταφυσική στα έργα Ελεύθεροι Πολιορκιμένοι, Κρητικός και Πόρφυρας. Αρχικά, συστήθηκε ο ποιητής καθώς και το περιβάλλον στο οποίο έζησε και διαμόρφωσε το πνευματικό του προφίλ. Στη συνέχεια, παρουσιάστηκαν τα έργα και μια ενδεικτική ερμηνεία τους, η οποία αποτέλεσε το εφαλτήριο για την φιλοσοφική ερμηνεία τους. Κατευθυντήρια ιδέα ήταν η ανάγκη του ποιητή να ενσωματώσει υψηλές ιδέες στον ποιητικό λόγο. Έτσι, η συλλογιστική που ακολουθήθηκε σχετίστηκε με την έννοια της δοκιμασίας των ποιητικών του υποκειμένων στα έργα αυτά και πώς μέσα από αυτήν οι ήρωες υπερβαίνουν τα προσωπικά τους όρια, κατακτούν την αυτογνωσία τους και τελικά την εσωτερική ελευθερία τους.
description: The purpose of the thesis was to prove the deep relation between the poetry of Dionysios Solomos with metaphysics in the works “Eleftheroi Poliorkimenoi” (The Free Besieged), “Kritikos” (The Cretan) and “Porfyras” (The Whale). Initially, the poet was introduced as well as the environment in which he lived and shaped his intellectual profile were presented. Then, the works and an indicative interpretation thereof which constituted the stepping stone for their philosophical interpretation were presented. The poet’s need to incorporate high ideas in his poetry was his guiding line. Thus, the reasoning that was followed was associated with the meaning of the poetic subjects’ trial and how the heroes supersede their own limits through it, how they gain their self-awareness and finally their inner freedom.
Fraser River white sturgeon long-term management : objectives, strategies and uncertainties
Creators: name: Echols, James Christopher
Publisher: name: University of British Columbia
Year: 2009

description: The sharp decline of Fraser River white sturgeon (Acipenser transmontanus) in the late 1800s was the result of large catches in response to a market demand for caviar and smoked sturgeon. After a long period of indifference, the British Columbian public became concerned with the lack of white sturgeon information and probable large stock decline during the summer of 1993 with the discovery of several large white sturgeon carcasses. In September of 1994, a "catch and release" policy was implemented and met with mixed reactions. Nevertheless, uncertainties about stock reactions to harvest favoured the current cautious approach to limit retention. The objectives of this thesis are to: clarify objectives and struucture strategies for white sturgeon management; analyze uncertainty under these strategies in a stock harvest model; and discuss the role of uncertainty in management decisions and structure. It must be recognized that no perfect management solution exists. However, structuring fisheries management objectives and exploring uncertain stock reactions must be the first, crucial step to success. By simulating future events based on past stock reaction patterns, various white sturgeon harvest strategies and their ability to achieve management objectives is evaluated. This study focuses on how Fraser River white sturgeon might react under various harvest strategies designed to achieve management objectives by treating recruitment stochastically in a delay-difference model as unpredictable "states of nature." Results indicate that the probability of over harvest changes surprisingly little. This may help managers and stakeholders to assess their roles in the management process. Thus, uncertainty was quantified to show that the role of risk assessment in developing strategies to achieve long-term harvest objectives for Fraser River white sturgeon is important. While theoretical arguments are not too convincing, in practice, white sturgeon may be suitable for unusual harvest management initiatives such as individual quotas.
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the wreck of the: Marion (1853-1885)
Creators: name: Borghi, Stefano
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: The history of the wooden schooner Marion, wrecked in 1885 in Criccieth (Wales).
The Clustering Evolution of Distant Red Galaxies in the GOODS-MUSIC Sample
Creators: name: Grazian, A.
name: Fontana, A.
name: Moscardini, L.
name: Salimbeni, S.
name: Menci, N.
name: Giallongo, E.
name: De Santis, C.
name: Gallozzi, S.
name: Nonino, M.
name: Cristiani, S.
name: Vanzella, E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We use the GOODS-MUSIC sample, a catalog of ~3000 Ks-selected galaxies based on VLT and HST observation of the GOODS-South field with extended multi-wavelength coverage (from 0.3 to 8 micron) and accurate estimates of the photometric redshifts to select 179 DRGs with J-Ks>1.3 in an area of 135 sq. arcmin. We first show that the J-Ks>1.3 criterion selects a rather heterogeneous sample of galaxies, going from the targeted high-redshift luminous evolved systems, to a significant fraction of lower redshift (1
description: paper submitted to A&A, version revised accounting for all referee Comments, uses aa.cls, 12 pages, 10 figures
Οι απόψεις των εκπαιδευτικών γενικής και ειδικής εκπαίδευσης για τη λειτουργία των τμημάτων ένταξης στο γενικό γυμνάσιο
Creators: name: Στεφάνου, Αλεξάνδρα Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Τμήματα Ένταξης στο Γυμνάσιο
Απόψεις Εκπαιδευτικών
Ένταξη
Εκπαιδευτικοί Γενικής και Ειδικής Εκπαίδευσης
Resource Room
Teachers’ Views
Mainstream Secondary Schools
General and Special Education Teachers
Inclusion

description: Σκοπός της παρούσας εργασίας είναι η διερεύνηση των απόψεων των εκπαιδευτικών γενικής και ειδικής εκπαίδευσης για τη λειτουργία των τμημάτων ένταξης στο γυμνάσιο. Στα πλαίσια της εργασίας καταγράφηκαν οι απόψεις συνολικά 86 εκπαιδευτικών, 42 που εργάζονταν στις γενικές τάξεις και 44 που εργάζονταν σε τμήματα ένταξης γυμνασίου στη Θεσσαλονίκη. Το εργαλείο της έρευνας ήταν το ερωτηματολόγιο. Τα ευρήματα της έρευνας έδειξαν ότι οι εκπαιδευτικοί στο σύνολό τους είναι πολύ θετικοί απέναντι στην ένταξη των μαθητών με ειδικές εκπαιδευτικές ανάγκες στο γυμνάσιο με τμήμα ένταξης. Διαπιστώνουν, όμως, ότι οι μαθητές ανταποκρίνονται σε διαφορετικό βαθμό στο αναλυτικό πρόγραμμα της τάξης και στους κανόνες λειτουργίας του σχολείου, ανάλογα με τη φύση και τη σοβαρότητα της ανεπάρκειάς τους. Ακόμα, υποστηρίζουν ότι οι επιδράσεις της λειτουργίας των τμημάτων ένταξης είναι σημαντικά λιγότερο θετικές στους μαθητές με νοητική ανεπάρκεια σε σχέση με τους μαθητές με ειδικές μαθησιακές δυσκολίες. Επιπλέον, οι εκπαιδευτικοί της γενικής τάξης είναι λιγότερο θετικοί από τους εκπαιδευτικούς των τμημάτων ένταξης, τόσο ως προς την καταλληλότητα του πλαισίου για την ένταξη των μαθητών με ειδικές εκπαιδευτικές ανάγκες, όσο και ως προς τον βαθμό ανταπόκρισης στις απαιτήσεις του σχολείου, καθώς και ως προς τη βελτίωση που επιφέρει η φοίτησή τους στο τμήμα ένταξης. Τέλος, η συντριπτική πλειοψηφία των εκπαιδευτικών διατυπώνει την ανάγκη υποστηρικτικών πρακτικών, που θα συμβάλλουν στη βελτίωση της ενταξιακής διαδικασίας.
description: The purpose of this study is to examine general and special education teachers’ views about the functioning of resource rooms in mainstream secondary schools. A total of 86 teachers participated in the study and completed the questionnaire, 42 of them worked in ordinary classes and 44 of them worked in resource rooms in mainstream secondary schools in Thessaloniki. It was found that teachers in secondary schools with resource rooms hold strong positive views towards inclusion. They believe that students with special educational needs respond at different degree to the demands of curriculum and rules of school, according to the nature and severity of their deficiency. They also believe that the positive effect of resource rooms significantly differs between students with special learning difficulties and students with mental deficiency. Teachers in secondary schools admit that there are serious obstacles to inclusion and they agree that specific practices can improve it. Another significant finding is that teachers of ordinary classes are less positive towards the results of inclusion for students with special educational needs in secondary school than teachers of resource rooms.