cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Αριθμητικό μοντέλο πρόβλεψης πεδίων θερμοκρασίας και χημικά απαιτούμενου οξυγόνου (COD) σε αναερόβια δεξαμενή λυμάτων: εφαρμογή στη βελτιστοποίηση σχεδιασμού
Creators: name: Καρτέρης, Απόστολος
Publisher: name: Aristotle University of Thessaloniki
Year: 2004
Subjects: Αναερόβια δεξαμενή σταθεροποίησης
Υγρά απόβλητα
Υπολογιστική ρευστοδυναμική
Anaerobic pond
Wasterwater
Computational fluid dynamics

description: Οι στόχοι αυτής της διατριβής ήταν η ανάπτυξη ενός τρισδιάστατου αλγόριθμου πρόβλεψης της θερμοκρασίας και του χημικά απαιτούμενου οξυγόνου(COD) μιας ανερόβιας δεξαμενής σταθεροποίησης λυμάτων, η ρύθμιση και επαλήθευση του μοντέλου αυτού με αξιοποίηση σειράς πειραματικών μετρήσεων σε πλήρους κλίμακας δεξαμενή και η χρησιμοποίηση του μοντέλου προσομοίωσης COD ως εργαλείου πρόβλεψης της απόδοσης εναλλακτικών σεναρίων σχεδίασης αναερόβιας δεξαμενής με τελικό στόχο τη βελτιστοποίηση της απομάκρυνσης COD. Το μικτό υδροδυναμικό-βιοχημικό-ενεργειακό υπολογιστικό μοντέλο αναπτύχθηκε με βάση το εξειδικευμένο πρόγραμμα υπολογιστικής ρευστομηχανικής FLUENT
description: The objective of the thesis was to develop a three dimensional(3-D) algorithm that predicts temperature and Chemical Oxugen Demand(COD) of an anaerobic pond, to calibrate and validate the mathematical model based on experimental data series collected by the candidate from a full-scale experimental anaerobic pond and finally, the utilization of the COD simulation model, as a predictive tool of the performance of modified design scenarios aiming to improve the anaerobic ponds COD removal. The computational hydrodynamic, biochemical and thermal energy model was developed on a specialized software environment of computational fluid dynamics(FLUENT), based on the numerical method of solving fluid mechanics equations according to the finite technique
Brief History of Quantum Cryptography: A Personal Perspective
Creators: name: Brassard, Gilles
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum cryptography is the only approach to privacy ever proposed that allows two parties (who do not share a long secret key ahead of time) to communicate with provably perfect secrecy under the nose of an eavesdropper endowed with unlimited computational power and whose technology is limited by nothing but the fundamental laws of nature. This essay provides a personal historical perspective on the field. For the sake of liveliness, the style is purposely that of a spontaneous after-dinner speech.
description: 14 pages, no figures
Demonstration of a uniform, high-pressure, high-temperature gas cell with a dual frequency comb absorption spectrometer
Creators: name: Cole, Ryan K.
name: Draper, Anthony D.
name: Schroeder, Paul J.
name: Casby, Cameron M.
name: Makowiecki, Amanda S.
name: Coburn, Sean C.
name: Steinbrenner, Julie E.
name: Hoghooghi, Nazanin
name: Rieker, Gregory B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Accurate absorption models for gases at high pressure and temperature support advanced optical combustion diagnostics and aid in the study of harsh planetary atmospheres. Developing and validating absorption models for these applications requires recreating the extreme temperature and pressure conditions of these environments in static, uniform, well-known conditions in the laboratory. Here, we present the design of a new gas cell to enable reference-quality absorption spectroscopy at high pressure and temperature. The design centers on a carefully controlled quartz sample cell housed at the core of a pressurized ceramic furnace. The half-meter sample cell is relatively long compared to past high- pressure and temperature absorption cells, and is surrounded by a molybdenum heat spreader that enables high temperature uniformity over the full length of the absorbing gas. We measure the temperature distribution of the sample gas using in situ thermocouples, and fully characterize the temperature uniformity across a full matrix of conditions up to 1000 K and 50 bar. The results demonstrate that the new design enables highly uniform and precisely known conditions across the full absorbing path length. Uniquely, we test the new gas cell with a broadband, high-resolution dual frequency comb spectrometer that enables highly resolved absorption spectroscopy across a wide range of temperature and pressure conditions. With this system, we measure the spectrum of CO$_2$ between 6800 and 7000 cm$^{-1}$ at pressures between 0.2 and 20 bar, and temperatures up to 1000 K. The measurements reveal discrepancies from spectra predicted by the HITRAN2016 database with a Voigt line shape at both low- and high-pressure conditions. These results motivate future work to expand absorption models and databases to accurately model high-pressure and -temperature spectra in combustion and planetary science research.
Analysis of wheat pricing policy in Zimbabwe
Creators: name: Kaviza, Theodora M.
Publisher: name: University of British Columbia
Year: 2008

description: In Zimbabwe, wheat is the principal crop planted in winter occupying about 95 percent of winter planted acreage, it is also one of the most tightly regulated of the controlled crops. Even though Zimbabwe's wheat industry is well developed by regional standards, domestic production has not kept pace with demand making imports necessary, draining scarce foreign exchange and heightening concerns about national food security. The study has reviewed how pricing policy has to date affected production and consumption trends of wheat. Three forms of policy intervention have been identified in the wheat industry in Zimbabwe: -- The producer price of wheat is consistently set below the world price. --A subsidy on imported wheat to the millers is maintained in order to keep the consumer price of wheat and wheat products low. --The government through foreign currency controls limit the amount of wheat that can be imported into the country. Using a Nerlovian Dynamic Supply Response Model the price supply elasticity of wheat in Zimbabwe was estimated, and used to construct a model of the wheat industry. The results of the model were then used to evaluate the impact of different policy interventions on wheat production, through policy simulation. Government policy in Zimbabwe taxes wheat producers while subsidising the consumers, thus current policy acts as a disincentive to increased output supply on the one hand, while it encourages increased demand on the other. Although studies from other countries show that wheat production is responsive to price incentives, the results of this study however show a very low short run price responsiveness (0.11). Thus raising producer prices, without redressing all the other factors affecting wheat production such as cost and availability of irrigation facilities, prices of substitutes etc, would have limited impact on total production. This study quantified the welfare effects and foreign exchange costs of current and alternative policy scenarios. Current policy in the wheat industry taxes the producers in excess of $39 million which is partly transferred to consumers and partly to government as revenue. Imports cost the country about $33 million in foreign currency in addition to a consumer subsidy of $4 million. The study also showed that uncompensated losses accounted for $1.08 million. The question for Zimbabwe is how to create the necessary conditions to increase price responsiveness, i.e what policy changes are necessary to increase total supply of wheat. The verall conclusion is that there is not a simple low cost option to redress the situation in the wheat industry in Zimbabwe. The situation calls for a review of all the policy instrumentsc currently in place, in addition to external factors such as the world price of wheat.
Αναπτυξιακά σχήματα ύπνου σε παιδιά νηπιακής ηλικίας και ο ρόλος της μητέρας
Creators: name: Ντέρη, Ιωάννα Α.
Publisher: name: Aristotle University of Thessaloniki
Year: 2004
Subjects: Σχήματα ύπνου
Υπνος νηπίων
Patterns of sleep
Sleep in prescholl children

description: Η παρούσα μελέτη ενδιαφέρεται να διερευνήσει τη συνθήκη του υπνου σε παιδιά νηπιακής ηλικίας, να καταγράψει τη συμμετοχή της μητέρας σε καθήκοντα παροχής φροντίδας και να σημειώσει διαφοροποιήσεις στη συνθήκη του ύπνου, οι οποίες οφείλονται στο φύλο, την ηλικία των παιδιών και την ύπαρξη ή μη αδελφών. Το δείγμα αποτελούν 182 παιδιά ηλικίας 4 έως 6 χρόνων που φοιτούν σε 19 δημόσια νηπιαγωγεία της πόλεως Θεσ/νίκης και του ευρύτερου πολεοδομικού συγκροτήματος. Λύφθηκαν συνεντεύξεις από μητέρες. Οι οικογένειες ανήκουν στα μεσαία και χαμηλά κοινωνικά στρώματα, ενώ χαρακτηριστικό είναι το γεγονός πως οι μητέρες σε ποσοστό 82,9% δεν εργάζονται εκτός σπιτιού. Η στατιστική επεξεργασία οδήγησε στα ακόλουθα συμπεράσματα. Η συνθήκη του ύπνου υπαγορεύεται από πρακτικές ανατροφής που εφαρμόζουν οι μητέρες. Η διαφοροποίηση επηρεάζεται από δύο χαρακτηριστικά των παιδιών που είναι η ηλικία και η ύπαρξη ή μη αδελφών. Το φύλο δε διαφοροποιεί τις συνήθειες που έχουν και τη στάση της μητέρας απέναντί τους. Τα μικρότερα σε ηλικία παιδιά και τα μονοχοπαίδια δέχονται σε περισσότερες περιστάσεις τη φυσική παρουσία της μητέρας
description: The present study is interested in investigated the sleep conditions of preschool children to record the mother's part in duties of care provision and to point out diffentation in sleep conditions which depend on the sex, the age and the existence or not of brothers and sisters. The sample consisted of 182 children between the age of four and six, who attend 19 public infant schools in the city of Thessaloniki and the wider urban group. The mothers were interviewed. The families are classified in the intermediate and law social strata and mothers work only as housewives in a percentage of 82.9%. The statistical process of the data led to the following conclusions. The sleep conditions are dictated by the mother's upbringing practices. The age and the existence of brothers or sisters, affected the differentiation. The children's sex does not differentiate their habits and their mother's attitude towards them. Younger children and only children accept in more cases the natural presence of their mother
Kirkwood-Dirac nonclassicality, support uncertainty and complete incompatibility
Creators: name: De Bievre, Stephan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Given two orthonormal bases in a d-dimensional Hilbert space, one associates to each state its Kirkwood-Dirac (KD) quasi-probability distribution. KD-nonclassical states - for which the KD-distribution takes on negative and/or nonreal values - have been shown to provide a quantum advantage in quantum metrology and information, raising the question of their identification. Under suitable conditions of incompatibility between the two bases, we provide sharp lower bounds on the support uncertainty of states that guarantee their KD-nonclassicality. In particular, when the bases are completely incompatible, a notion we introduce, states whose support uncertainty is not equal to its minimal value d+1 are necessarily KD-nonclassical. The implications of these general results for various commonly used bases, including the mutually unbiased ones, and their perturbations, are detailed.
Quantum States and Phases in Driven Open Quantum Systems with Cold Atoms
Creators: name: Diehl, S.
name: Micheli, A.
name: Kantian, A.
name: Kraus, B.
name: Büchler, H. P.
name: Zoller, P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: An open quantum system, whose time evolution is governed by a master equation, can be driven into a given pure quantum state by an appropriate design of the system-reservoir coupling. This points out a route towards preparing many body states and non-equilibrium quantum phases by quantum reservoir engineering. Here we discuss in detail the example of a \emph{driven dissipative Bose Einstein Condensate} of bosons and of paired fermions, where atoms in an optical lattice are coupled to a bath of Bogoliubov excitations via the atomic current representing \emph{local dissipation}. In the absence of interactions the lattice gas is driven into a pure state with long range order. Weak interactions lead to a weakly mixed state, which in 3D can be understood as a depletion of the condensate, and in 1D and 2D exhibits properties reminiscent of a Luttinger liquid or a Kosterlitz-Thouless critical phase at finite temperature, with the role of the ``finite temperature'' played by the interactions.
description: 9 pages, 2 figures
Dropping rho and A1 Meson Masses at the Chiral Phase Transition in the Generalized Hidden Local Symmetry
Creators: name: Harada, Masayasu
name: Sasaki, Chihiro
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In this contribution to the proceedings, we present our recent analysis on the chiral symmetry restoration in the generalized hidden local symmetry (GHLS) which incorporates the rho meson, $A_1$ meson and the pion consistently with the chiral symmetry of QCD. It is shown that a set of parameter relations, which ensures the first and second Weinberg sum rules, is invariant under the renormalization group evolution. Then, it is found that the Weinberg sum rules together with the matching of the vector and axial-vector current correlators to the OPE inevitably leads to {\it the dropping masses of both rho and $A_1$ mesons} at the symmetry restoration point, and that the mass ratio flows into one of three fixed points.
description: Contribution to the proceedings of 2006 International Workshop on ``Origin of Mass and Strong Coupling Gauge Theories'' (SCGT06)
Part VII: Review of Methods Customarily Used in Postsecondary Educational Research
Creators: name: Archibald, Jo-Ann
name: Bowman, Sheena Selkirk
name: Pepper, Floy
name: Urion, Carl
Publisher: name: Canadian Journal of Native Education
Year: 2021

description: NA
description: Canadian Journal of Native Education, Vol. 21 No. 1 (1995)
Remarkably high mass and high velocity dispersion of molecular gas associated with a regular, absorption-selected type-I quasar
Creators: name: Noterdaeme, P.
name: Balashev, S.
name: Combes, F.
name: Gupta, N.
name: Srianand, R.
name: Krogager, J. -K.
name: Laursen, P.
name: Omont, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present 3-mm observations of the quasar J0015+1842 at z=2.63 with the NOrthern Extended Millimeter Array (NOEMA). Our data reveals molecular gas, traced via a Gaussian CO(3-2) line, with a remarkably large velocity dispersion (FWHM=1010+/-120 km/s) and corresponding to a total molecular mass MH2~(3.4-17)x10^10 Msun, depending on the adopted CO-to-H2 conversion factor alphaCO=(0.8-4.0) Msun (km/s pc^2)^-1. Assuming the 3-mm continuum emission is thermal, we derive a dust mass of the order of Mdust ~5x10^8 Msun. J0015+1842 is located in the molecular gas-rich region in the IR vs CO line luminosity diagram, in-between the main locus of main-sequence and sub-millimetre galaxies and that of most other AGNs targeted so far for CO measurements. While the large velocity dispersion of the CO line suggests a merging system, J0015+1842 is observed to be a regular, only very moderately dust-reddened (Av~0.3-0.4) type-I quasar from its UV-optical spectrum, from which we infer a mass of the super-massive black hole be around MBH~6x10^8 Msun. We suggest that J0015+1842 is observed at a galaxy evolutionary stage where a massive merger has brought significant amounts of gas towards an actively accreting super-massive black hole (quasar). While the host still contains a large amount of dust and molecular gas with high velocity dispersion, the quasar has already cleared the way towards the observer, likely through powerful outflows as recently revealed by optical observations of the same object. High angular resolution observations of this and similar systems} should help determining better the respective importance of evolution and orientation in the appearance of quasars and their host galaxies and have the potential to investigate early feedback and star-formation processes in galaxies in their quasar phases.
description: 5 pages, 5 figures, accepted for publication in A\&A
Dielectric catastrophe at the magnetic field induced insulator to metal transition in Pr1-xCaxMnO3 (x=0.30, 0.37) crystals
Creators: name: Kundys, B.
name: Bellido, N.
name: Martin, C.
name: Simon, Ch.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The dielectric permittivity and resistivity have been measured simultaneously as a function of magnetic field in Pr1-xCaxMnO3 crystals with different doping. A huge increase of dielectric permittivity was detected near percolation threshold. The dielectric and conductive properties are found to be mutually correlated throughout insulator to metal transition evidencing the dielectric catastrophe phenomenon. Data are analyzed in a framework of Maxwell-Garnett theory and the Mott-Hubbard theory attributed to the role of strong Coulomb interactions.
description: 5 pages, 5 figures
Microscopic Theory of Superconductor-Constriction-Superconductor Josephson Junctions in a Magnetic Field
Creators: name: Gumann, A.
name: Dahm, T.
name: Schopohl, N.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Self-consistent solutions of microscopic Eilenberger theory are presented for a two-dimensional model of a superconducting channel with a geometric constriction. Magnetic fields, external ones as well as those caused by the supercurrents, are included and the relevant equations are solved numerically without further assumptions. Results concerning the influence of temperature, geometric parameters, of $κ=λ_L/ξ_0$ and of external magnetic fields on the Andreev bound states in the weak link and on the current-phase relation are presented. We find that the Andreev bound states within the junction obtain peculiar substructure when a finite supercurrent flows. As long as the London penetration depth is comparable to or bigger than the extension of the constriction, the Josephson effect is independent of $κ$. Furthermore, the weak link is very insensitive to external magnetic fields. Features restricted to a self-consistent calculation are discussed.
description: 15 pages, 16 figures; New, shortened version. Some additional clarifications added. Accepted for publication in Phys. Rev. B
Underground Water Cherenkov Muon Detector Array with the Tibet Air Shower Array for Gamma-Ray Astronomy in the 100 TeV Region
Creators: name: The Tibet AS Gamma Collaboration
name: Amenomori, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We propose to build a large water-Cherenkov-type muon-detector array (Tibet MD array) around the 37,000 m$^{2}$ Tibet air shower array (Tibet AS array) already constructed at 4,300 m above sea level in Tibet, China. Each muon detector is a waterproof concrete pool, 6 m wide $\times$ 6 m long $\times$ 1.5 m deep in size, equipped with a 20 inch-in-diameter PMT. The Tibet MD array consists of 240 muon detectors set up 2.5 m underground. Its total effective area will be 8,640 m$^{2}$ for muon detection. The Tibet MD array will significantly improve gamma-ray sensitivity of the Tibet AS array in the 100 TeV region (10-1000 TeV) by means of gamma/hadron separation based on counting the number of muons accompanying an air shower. The Tibet AS+MD array will have the sensitivity to gamma rays in the 100 TeV region by an order of magnitude better than any other previous existing detectors in the world.
description: 4 pages, 4 figures, Accepted for publication in Astrophysics and Space Science, proceeding of "The Multi-Messenger Approach to High-Energy Gamma-Ray Sources", Barcelona, July 4-7, 2006
Updated systematics of intermediate-energy single-nucleon removal cross sections
Creators: name: Tostevin, J. A.
name: Gade, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The body of experimental measurements of intermediate-energy reactions that remove a single nucleon from a secondary beam of neutron- or proton-rich nuclei continues to grow. These data have been analysed consistently using an approximate, eikonal-model treatment of the reaction dynamics combined with appropriate shell-model descriptions of the projectile initial state, the bound final states spectrum of the reaction residue and single-particle removal strengths computed from their wave-function overlaps. The systematics of the ratio $R_s$ of the measured inclusive cross-section to all bound final states and the calculated cross-section to bound shell-model states -- in different regions of the nuclear chart and involving both very weakly-bound and strongly-bound valence nucleons -- is important in relating the empirically deduced orbital occupancies to those from the best available shell-model predictions. Importantly, several new higher-energy measurements, for which the sudden-approximation aspect of the dynamical description is placed on an even stronger footing, now supplement the previously-analysed measurements. These additional data sets are discussed. Their $R_s$ values are shown to conform to and reinforce the earlier-observed systematics, with no indication that the approximately linear reduction in $R_s$ with increasing nucleon separation energy is a consequence of a breakdown of the sudden approximation.
description: 8 pages, 2 figures
Ultrarelativistic electrons in counterpropagating laser beams
Creators: name: Lv, Q. Z.
name: Raicher, E.
name: Keitel, C. H.
name: Hatsagortsyan, K. Z.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The dynamics and radiation of ultrarelativistic electrons in strong counterpropagating laser beams are investigated. Assuming that the particle energy is the dominant scale in the problem, an approximate solution of classical equations of motion is derived and the characteristic features of the motion are examined. A specific regime is found with comparable strong field quantum parameters of the beams, when the electron trajectory exhibits ultrashort spike-like features, which bears great significance to the corresponding radiation properties. An analytical expression for the spectral distribution of spontaneous radiation is derived in the framework of the Baier-Katkov semiclassical approximation based on the classical trajectory. All the analytical results are further validated by exact numerical calculations. We consider a non-resonant regime of interaction, when the laser frequencies in the electron rest frame are far from each other, avoiding stimulated emission. Special attention is devoted to settings when the description of radiation via the local constant field approximation fails and to corresponding spectral features. Periodic and non-periodic regimes are considered, when lab frequencies of the laser waves are always commensurate. The sensitivity of spectra with respect to the electron beam spread, focusing and finite duration of the laser beams is explored.
description: 23 papes, 10 figures
Part VI: First Nations Postsecondary Education: A Review
Creators: name: Archibald, Jo-Ann
name: Bowman, Sheena Selkirk
name: Pepper, Floy
name: Urion, Carl
Publisher: name: Canadian Journal of Native Education
Year: 2021

description: NA
description: Canadian Journal of Native Education, Vol. 21 No. 1 (1995)
Measuring Ages and Elemental Abundances from Unresolved Stellar Populations: Fe, Mg, C, N, and Ca
Creators: name: Graves, Genevieve J.
name: Schiavon, Ricardo P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a method for determining mean light-weighted ages and abundances of Fe, Mg, C, N, and Ca, from medium resolution spectroscopy of unresolved stellar populations. The method, pioneered by Schiavon (2007), is implemented in a publicly available code called EZ_Ages. The method and error estimation are described, and the results tested for accuracy and consistency, by application to integrated spectra of well-known Galactic globular and open clusters. Ages and abundances from integrated light analysis agree with studies of resolved stars to within +/-0.1 dex for most clusters, and to within +/-0.2 dex for nearly all cases. The results are robust to the choice of Lick indices used in the fitting to within +/-0.1 dex, except for a few systematic deviations which are clearly categorized. The realism of our error estimates is checked through comparison with detailed Monte Carlo simulations. Finally, we apply EZ_Ages to the sample of galaxies presented in Thomas et al. (2005) and compare our derived values of age, [Fe/H], and [alpha/Fe] to their analysis. We find that [alpha/Fe] is very consistent between the two analyses, that ages are consistent for old (Age > 10 Gyr) populations, but show modest systematic differences at younger ages, and that [Fe/H] is fairly consistent, with small systematic differences related to the age systematics. Overall, EZ_Ages provides accurate estimates of fundamental parameters from medium resolution spectra of unresolved stellar populations in the old and intermediate-age regime, for the first time allowing quantitative estimates of the abundances of C, N, and Ca in these unresolved systems. The EZ_Ages code can be downloaded at http://www.ucolick.org/~graves/EZ_Ages.html
description: Accepted to ApJS
Quantum Theory of a Resonant Photonic Crystal
Creators: name: Chong, Y. D.
name: Pritchard, David E.
name: Soljacic, Marin
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present a quantum model of two-level atoms localized in a 3D lattice, based on the Hopfield theory of exciton polaritons. In addition to a polaritonic gap at the exciton energy, a photonic bandgap opens up at the Brillouin zone boundary. Upon tuning the lattice period or angle of incidence to match the photonic gap with the exciton energy, one obtains a combined polaritonic and photonic gap as a generalization of Rabi splitting. For typical experimental parameters, the size of the combined gap is on the order of 25 cm^{-1}, up to 10^5 times the detuned gap size. The dispersion curve contains a branch supporting slow-light modes with vanishing exciton probability density.
description: 4 pages, 3 figures
Εκτεταμένες ατέλειες σε ημιαγωγικές ενώσεις
Creators: name: Κιoσέογλου, Ιωσήφ
Publisher: name: Aristotle University of Thessaloniki
Year: 2004
Subjects: Ηλεκτρονική μικροσκοπία
Εμπειρικό δυναμικό
Εκτεταμένες ατέλειες
Electron microscopy
Empirical potential
Extended defects

description: Ο στόχος της παρούσας διατριβής είναι η ανάλυση των δομικών ιδιοτήτων και η μελέτη της ενέργειας και των δομών ηρεμίας των εκτεταμένων ατελειών των υμενίων GaN. Η μελέτη της μικροδομής των υμενίων γίνεται σε ατομικό επίπεδο από πειραματικές παρατηρήσεις ηλεκτρονικής μικροσκοπίας διερχόμενης δέσμης υψηλής διακριτικής ικανότητας(HRTEM). Η μορφολογική και δομική ανάλυση των εκτεταμένων ατελειών γίνεται με τη βοήθεια της τοπολογικής θεωρίας, της απεικόνισης και ανάλυσης φάσης των ARTEM παρατηρήσεων και των εικόνων προσομοίωσης. Ειδικότερα, οι αρχικές ατομικές δομές προσδιορίζονται είτε με τη βοήθεια της κρυσταλλογραφίαςκαι της τοπολογικής θεωρίας έιτε με τον υπολογισμό του πεδίου μετατοπίσεων βάσει της ελαστικής θεωρίας. Ενεργειακοί υπολογισμοί με την χρήση εμπειρικού δυναμικού και αβ initio μεθόδων χρησιμοποιούνται για την εύρεση των ατομικών δομών χαμηλότερης ενέργειας και άλλων χαρακτηριστικών των εκτεταμένων ατελειών
description: The aim of this thesis is to analyse the structural and energetic characteristic of extended defects in GaN layers. Experimental observations, using high resolution election microscops (HRTEM), provide the microstructural investigation at the atomic level. Morphological and structural analysis at extended defects in GaN film is pesformed using the topological theory of interfacial defects, the geometric phase method and copmutes simulation of HRTEM imager. In particular, the initial atomic configuration were established a priori using crystallography and topological theory or by employing displacements expected from elasticity theory. Empirical potential and ab-initio calculation are employed to define the energetic relaxation of the defect configurations and the energetic favourable models, which are encounter in GaN films
Statistical methods applied to composition studies of ultrahigh energy cosmic rays
Creators: name: Catalani, F.
name: Chinellato, J. A.
name: de Souza, V.
name: Takahashi, J.
name: Vasconcelos, G. M. S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The mass composition of high energy cosmic rays above $10^{17}$ eV is a crucial issue to solve some open questions in astrophysics such as the acceleration and propagation mechanisms. Unfortunately, the standard procedures to identify the primary particle of a cosmic ray shower have low efficiency mainly due to large fluctuations and limited experimental observables. We present a statistical method for composition studies based on several measurable features of the longitudinal development of the CR shower such as $N_{max}$, $X_{max}$, asymmetry, skewness and kurtosis. Principal component analysis (PCA) was used to evaluate the relevance of each parameter in the representation of the overall shower features and a linear discriminant analysis (LDA) was used to combine the different parameters to maximize the discrimination between different particle showers. The new parameter from LDA provides a separation between primary gammas, proton and iron nuclei better than the procedures based on $X_{max}$ only. The method proposed here was successfully tested in the energy range from $10^{17}$ to $10^{20}$ eV even when limitations of shower track length were included in order to simulate the field of view of fluorescence telescopes.
Honoring What They Say Part V: Reflections and Recommendations
Creators: name: Archibald, Jo-Ann
name: Bowman, Sheena Selkirk
name: Pepper, Floy
name: Urion, Carl
Publisher: name: Canadian Journal of Native Education
Year: 2021

description: I could write a book about how my experience at NITEP and Ts"Kel has influenced my life. It has been great! What I have gained I am able to return. That's the beauty of it. The expression I like that describes the feeling is: "My Heart Soars."
description: Canadian Journal of Native Education, Vol. 21 No. 1 (1995)
Phenomenological Quantum Gravity
Creators: name: Hossenfelder, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Planck scale physics represents a future challenge, located between particle physics and general relativity. The Planck scale marks a threshold beyond which the old description of spacetime breaks down and conceptually new phenomena must appear. In the last years, increased efforts have been made to examine the phenomenology of quantum gravity, even if the full theory is still unknown.
description: To appear in Proceedings of SUSY06, the 14th International Conference on Supersymmetry and the Unification of Fundamental Interactions, UC Irvine, California, 12-17 June 2006
Publishing (and Forgetting) the Small or Medium-sized Scholarly Edition or Cultural Heritage Collection as Linked Open Data: Using Zenodo and Github to Publish the Visionary Cross Project (slides)
Creators: name: O'Donnell, Daniel Paul
name: Singh, Gurpreet
name: Porter, Dot
name: Rosselli Del Turco, Roberto
name: Callieri, Marco
name: Dellepiane, Matteo
name: Scopigno, Roberto
Publisher: name: Zenodo
Year: 2019
Subjects: Zenodo
GitHub
Open Research Methods
Digital Libraries
Digital Scholarly Editing

description: We discuss an approach to publishing heterogeneous file data and long-form humanities research as both linked open data and a (human readable) digital scholarly edition using Zenodo and Github. This approach is broadly generalisable and answers a number of long-standing issues surrounding the publication of data and results in DH: It promotes the discovery and long-term survival of published data and results with no requirement for future maintenance; It conforms to archival standards and principles; It is fully available for future extension, addition, excerption, reuse, repurposing, or reanalysis by others without negotiation; It ensures that data and contextual analysis are linked bi-directionally meaning that users are always able both to access the discrete data points from which a Humanities-focused analysis and commentary is build and understand each data point in the context of these larger synthetic research products. This is a slightly modified version presented at IIT Gandhinagar for the Winter Institute In Digital Humanities 2019
description: This is a slightly modified version of the DH2019 talk, presented at IITGN for the Winter Institute in Digital Humanities.
PHILOSOPHICAL IDEAS AND THEIR CLASSIFICATION IN THE EMIRATE OF BUKHARA AT THE BEGINNING OF THE 20TH CENTURY
Creators: name: Abdullayeva, Saodat
Publisher: name: Zenodo
Year: 2023

description: This article provides information about a number of philosophical ideas and their classification that prevailed in Central Asia, especially in the Emirate of Bukhara, at the beginning of the 20th century. Special attention is paid to the research of the scientific heritage of our ancestors who lived and created during this period, and in particular, attention is paid to its place in the education of young people. In addition to these, the purpose and activity of the philosophy of the 20th century, its importance and development are highlighted.
Publishing (and Forgetting) the Small or Medium-sized Scholarly Edition or Cultural Heritage Collection as Linked Open Data: Using Zenodo and Github to Publish the Visionary Cross Project (slides)
Creators: name: O'Donnell, Daniel Paul
name: Singh, Gurpreet
name: Porter, Dot
name: Rosselli Del Turco, Roberto
name: Callieri, Marco
name: Dellepiane, Matteo
name: Scopigno, Roberto
Publisher: name: Zenodo
Year: 2019
Subjects: Zenodo
GitHub
Open Research Methods
Digital Libraries
Digital Scholarly Editing

description: We discuss an approach to publishing heterogeneous file data and long-form humanities research as both linked open data and a (human readable) digital scholarly edition using Zenodo and Github. This approach is broadly generalisable and answers a number of long-standing issues surrounding the publication of data and results in DH: It promotes the discovery and long-term survival of published data and results with no requirement for future maintenance; It conforms to archival standards and principles; It is fully available for future extension, addition, excerption, reuse, repurposing, or reanalysis by others without negotiation; It ensures that data and contextual analysis are linked bi-directionally meaning that users are always able both to access the discrete data points from which a Humanities-focused analysis and commentary is build and understand each data point in the context of these larger synthetic research products.
String Scale Thermal Anti-de Sitter Spaces
Creators: name: Ashok, Sujay K.
name: Troost, Jan
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study finite temperature string scale $AdS_3$ backgrounds. One background is $AdS_3 \times S^1 \times T^2$ in which the anti-de Sitter space-time and the circle are at the radius $\sqrt{α'}$. Using path integral techniques, we show that the bulk spectrum includes a continuum of states as well as Ramond-Ramond ground states that agree with those of the symmetric orbifold of the two-torus after second quantization. We also examine the one-loop free energy of the background $AdS_3 \times S^1$ at curvature radius $\sqrt{2 α'/3}$. In the space-time NSNS sector, the string theory spontaneously breaks conformal symmetry as well as R-charge conjugation symmetry. We prove that the minimum in the boundary energy is reached for a singly wound string. In the RR sector, we classify the infinite set of ground states with fractional R-charges. Moreover, we remark on the behaviour of critical temperatures as the curvature scale becomes smaller than the string scale. In an appendix, we derive the Hawking-Page transition in string theory by integrating a world sheet one-point function.
description: 20 pages
Pion electromagnetic form factor with Minkowskian dynamics
Creators: name: Ydrefors, Emanuel
name: de Paula, Wayne
name: Nogueira, Jorge H Alvarenga
name: Frederico, Tobias
name: Salmé, Giovanni
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The pion electromagnetic form factor has been calculated for the first time from the solutions of the Bethe-Salpeter equation, obtained directly in Minkowski space by using the Nakanishi integral representation of the Bethe-Salpeter amplitude. The one-gluon exchange kernel contains as inputs the quark and gluon masses, as well as a scale parameter featuring the extended quark-gluon vertex. The range of variability of these parameters is suggested by lattice calculations. After presenting a very successful comparison with the existing data in the whole range of the momentum transfer, we show how inserting the light-front (LF) formalism in our approach allows to achieve further interesting results, like the evaluation of the LF valence form factor and a first investigation of the end-points effects.
Μέτρα ομοιότητας με εναλλακτικές μεθόδους για συστήματα συλλογιστικής των περιπτώσεων(Case-Based Reasoning)
Creators: name: Νικολαϊδης, Σάββας Ι.
Publisher: name: Aristotle University of Thessaloniki
Year: 2004
Subjects: Συλλογιστική των περιπτώσεων
Συστήματα γνώσης
Case-Based Reasoning
Knowledge Based Systems

description: Τα συστήματα Συλλογιστικής των Περιπτώσεων(Case-Based Reasoning systems) ή συστήματα βασισμένης σε Περιπτώσεις Συλλογιατικής, αποτελεούν κλάδο την λεγομένω "Οκνηρών" συστημάτων Μηχανικής Μάθησης. Επιτυγχάνουν τη μάθηση με την αποθήκευση παλαιοτέρων εμπειριών και τα τελευταία χρόνια γνωρίζουν μεγάλη ανάπτυξη. Η χρήση μιας συνάρτησης ομοιότητας, η οποία χρησιμοποιείται για τον εντοπισμό και την ανάκτηση της πιο όμοιας περίπτωσης από τη Βάση Περιπτώσεων, είναι ένα κρίσιμο σημείο για την λειτουργία συστημάτων Βασισμένης σε Περιπτώσεις Συλλογιστικής. Οι κλασικές μετρικές ομοιότητας που χρησιμοποιούνται στα καθιερωμένα συστήματα συλλογιστικής των περιπτώσεων περιλαμβάνου την ευκλείδια απόσταση και παραλλαγές της. Εναλλακτικές μέθοδοι μπορούν να εφαρμοστούν σε συνάρτηση με τη φύση των δεδομένων και τις ιδιαιτερότητες του προβλήματος. Η παρούσα διατριβή μελετάει μη καθιερωμένες τεχνικές ομοιότητας, όπως μετρικές βασισμένες στην Ασαφή Λογική και την Απόσταση Διόρθωσης, οι οποίες μπορούν να χρησιμοποιηθούν σε συστήματα βασιζόμενα σε περιπτώσεις. Τέτοιες προσεγγίσεις περιγράφονται και εκτελούνται πειράματα με συστήματα που τις χρησιμοποιούν. Προτείνεται επίσης συνδυασμός χρήσης περισσότερων από μια τεχνικών σε συστήματα συλλογιστικής των περιπτώσεων
description: Case-based Reasoning systems constitute sector of "Lazy" Machine Learning systems. They reach the learning with the storage of older experiences and during the recent years they have known big growth. The use of a similarity function, which is used for the retrieval of most similar case from the Case Base, is a critical point for the operation of Case-based Reasoning systems. Classic resemblance metric that is used in the established Case-based Reasoning systems include the Euclidean distance and its variants. Alternative methods can be applied in connection with the nature of data and the particularities of the problem. In this thesis we present and study non established techniques of resemblance that they can be used in systems based on cases. Such approaches, which include using fuzzy logic and the edit distance function, are described and experiments are executed with systems that use them. Combination of use of more than one techniques in case based reasoning systems is also proposed
A relationship between scalar Green functions on hyperbolic and Euclidean Rindler spaces
Creators: name: Haba, Z.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We derive a formula connecting in any dimension the Green function on the D+1 dimensional Euclidean Rindler space and the one for a minimally coupled scalar field with a mass m in the D dimensional hyperbolic space. The relation takes a simple form in the momentum space where the Green functions are equal at the momenta (p_0,\bf p) for Rindler and (m,\bf p) for hyperbolic space with a simple additive relation between the squares of the mass and the momenta. The formula has applications to finite temperature Green functions, Green functions on the cone and on the 9compactified) Milne space-time. Analytic continuations and interacting quantum fields are briefly discussed.
description: more on analytic continuation,references added, the version to appear in Journ.Phys.A
Optimal mechanical harvester route planning for sugarcane f ield operations using particle swarm optimization
Creators: name: Woraya Neungmatcha
name: Kanchana Sethanan
Publisher: name: Faculty of Engineering, Khon Kaen University
Year: 2015
Subjects: Sugarcane,Harvester,Route planning,Particle swarm optimization

description: 2, 42, KKU Engineering Journal
An evaluation of speed limit measure: A case of the Mittraphap highway passing through Khon Kaen city
Creators: name: Phongphan Tankasem
name: Wichuda Satiennam
name: Thaned Satiennam
Publisher: name: Faculty of Engineering, Khon Kaen University
Year: 2015
Subjects: Speed,Speed limit,Driver's attitude,Urban arterial road,Accident

description: 2, 42, KKU Engineering Journal
Strong Near-Infrared Emission Interior to the Dust-Sublimation Radius of Young Stellar Objects MWC275 and AB Aur
Creators: name: Tannirkulam, A.
name: Monnier, J. D.
name: Millan-Gabet, R.
name: Harries, T. J.
name: Pedretti, E.
name: Brummelaar, T. A. ten
name: McAlister, H.
name: Turner, N.
name: Sturmann, J.
name: Sturmann, L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Using the longest optical-interferometeric baselines currently available, we have detected strong near-infrared (NIR) emission from inside the dust-destruction radius of Herbig Ae stars MWC275 and AB Aur. Our sub-milli-arcsecond resolution observations unambiguously place the emission between the dust-destruction radius and the magnetospheric co-rotation radius. We argue that this new component corresponds to hot gas inside the dust-sublimation radius, confirming recent claims based on spectrally-resolved interferometry and dust evaporation front modeling.
description: 12 pages, 4 figures, Accepted for publication in ApJL
Η εκκλησιαστική γεωγραφία του Οικουμενικού Πατραρχείου από τον 9ο αιώνα μέχρι το 1453
Creators: name: Ακριτίδης, Νικόλαος Σ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2004
Subjects: Ιστορική γεωγραφία
Εκκλησιαστική διοίκηση
Κανόνας 28ος
Historical geography
Ecclesiastical administration
Canon 28th

description: Ο χώρος στον οποίο το Πατριαρχείο Κων/πόλεως ασκούσε διοικητική δικαιοδοσία ήταν χώρος των γεωγραφικών αντιθέσεων, όπου τα κύρια χαρακτηριστικά της Βαλκανικής, της Μ. Ασίας, της Μεσογείου, του Κυκάσου και της Ρωσικής στέπας επηρέαζαν τις ιστορικο-πολιτικές και κοινωικο-οικονομικές εξελίξεις της υπό μελέτης χρονικής περιόδου. Η γεωγραφική θέση του Πατριαρχείου Κων/πόλεως στην "καρδιά" της Βυζαντινής Αυτοκρατορίας και η στενή σχέση του με το κέντρο εξουσίας του κράτους, ήταν αποφασιστικοί παράγοντες όχι μόνο για την εξέλιξη της δικαιοδοσίας του, αλλά και για την ιστορική εξελικτική μορφή του γεωγραφικού χώρου που λαταλάμβανε σε διάφορες περιόδους. Παρουσιάζει μεγάλο ενδιαφέρον λοιπόν, για τον ερευνητή, η ιστορική μελέτη της γεωγραφικής ενότητας του Πατριαρχείου Κων/πόλεως, τόσο ως προς τη σχέση του με το Βυζαντινό κράτος, όσο και ως αυτόνομη περιοχή, από τηην άποψη της διοικητικής και φυσικής διάρθωσής του
description: The place that the Patriarchate of Constantinople exercised administrative authority was a place of geographical clashes, where the main characteristics of the Balkan area, Asia Minor, Mediterranean, Caucasus and Russian steppe influenced the historical - political and the social - economical development of the period referred in this research. The geographical position of Constantinople's Patriarchate, which was in the "heart" of the Byzantine Empire and its' close relation to the power center of the state, where decisive factors in the development of it;s authority as well as in the historical evolutionary form of the geographical area which occupied in different periods. So, the historical study of the gepgraphical unity of Constantinople's Patriarchate is of great interest for the researcher, both for its' relation with the Byzantine Empire and as an autonomous region, in respect of its' administrative and physical structure
BAO angular scale at z_eff = 0.11 with the SDSS blue galaxies
Creators: name: de Carvalho, E.
name: Bernui, A.
name: Avila, F.
name: Novaes, C. P.
name: Nogueira-Cavalcante, J. P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We measure the transverse baryon acoustic oscillations (BAO) signal in the local Universe using a sample of blue galaxies from the Sloan Digital Sky Survey (SDSS) survey as a cosmological tracer. The method is weakly dependent on a cosmological model and is suitable for 2D analyses in thin redshift bins to investigate the SDSS data in the interval $z {\in} [0.105, 0.115]$. We detect the transverse BAO signal $θ_{BAO} = 19.8^° {\pm} 1.05^°$ at $z_{eff} = 0.11$, with a statistical significance of $2.2 σ$. Additionally, we perform tests that confirm the robustness of this angular BAO signature. Supported by a large set of log-normal simulations, our error analyses include statistical and systematic contributions. In addition, considering the sound horizon scale calculated by the Planck Collaboration, $r_{s}^{Planck}$, and the $θ_{BAO}$ value obtained here, we obtain a measurement of the angular diameter distance $D_{A}(0.11) = 258.31 {\pm} 13.71 \,Mpc/h$. Moreover, combining this $θ_{BAO}$ measurement at low redshift with other BAO angular scale data reported in the literature, we perform statistical analyses for the cosmological parameters of some Lambda cold dark matter ($Λ$CDM) type models.
description: 7 pages, 7 figures