cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Reconstruction of Gas Temperature and Density Profiles of the Galaxy Cluster RX J1347.5-1145
Creators: name: Yuan, Qiang
name: Zhang, Tong-Jie
name: Wang, Bao-Quan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We use observations of Sunyaev-Zel'dovich effect and X-ray surface brightness to reconstruct the radial profiles of gas temperature and density under the assumption of a spherically symmetric distribution of the gas. The method of reconstruction, first raised by Silk & White, depends directly on the observations of the Sunyaev-Zel'dovich effect and the X-ray surface brightness, without involving additional assumptions such as the equation of state of the gas or the conditions of hydrostatic equilibrium. We applied this method to the cluster RX J1347.5-1145, which has both the Sunyaev-Zel'dovich effect and X-ray observations with relative high precision. It is shown that it will be an effective method to obtain the gas distribution in galaxy clusters. Statistical errors of the derived temperature and density profiles of gas were estimated according to the observational uncertainties.
description: 6 pages, 1 figure. The published version, 2008, Chin. J. Astron. Astrophys., 8, 671
lCARE -- localizing Conditional AutoRegressive Expectiles
Creators: name: Xu, Xiu
name: Mihoci, Andrija
name: Härdle, Wolfgang Karl
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Finance (q-fin.ST)
subject: FOS: Economics and business

description: We account for time-varying parameters in the conditional expectile-based value at risk (EVaR) model. The EVaR downside risk is more sensitive to the magnitude of portfolio losses compared to the quantile-based value at risk (QVaR). Rather than fitting the expectile models over ad-hoc fixed data windows, this study focuses on parameter instability of tail risk dynamics by utilising a local parametric approach. Our framework yields a data-driven optimal interval length at each time point by a sequential test. Empirical evidence at three stock markets from 2005-2016 shows that the selected lengths account for approximately 3-6 months of daily observations. This method performs favorable compared to the models with one-year fixed intervals, as well as quantile based candidates while employing a time invariant portfolio protection (TIPP) strategy for the DAX, FTSE 100 and S&P 500 portfolios. The tail risk measure implied by our model finally provides valuable insights for asset allocation and portfolio insurance.
Smoothing of patterned gallium arsenide surfaces during epitaxial growth
Creators: name: Ballestad, Anders
Publisher: name: University of British Columbia
Year: 2009

description: Control over the surface structure of semiconductor films during growth is critical for devices of recent technological importance. Typically the length scales of interest range from nanometers to micrometers. Examples include the size and spacing of quantum dots in quantum dot lasers, and the pitch and amplitude of grating structures for distributed Bragg reflectors. Elastic light scattering has atomic height sensitivity to this surface structure, on lateral length scales as low as half the incident wavelength, and is easily implemented for in-situ monitoring during film growth [1]. For the smooth surfaces of interest here, the distribution of the scattered light intensity as a function of scattering angle directly maps out the power spectral density (PSD). The PSD gives the 'root mean square' roughness of the surface structure as a function of inverse length scale, or spatial frequency. Here we present in-situ light scattering measurements performed during III-V semiconductor film growth by molecular beam epitaxy (MBE). We have used the technique to monitor the smoothing of one-dimensional grating structures during regrowth. For the regrowth experiments, the grating pitch was chosen such that the detection angle of the in-situ measurement coincided with the scattering peak associated with a harmonic of the grating periodicity. Because the initial shape of the patterned surface is known, it is possible to reconstruct the shape of the grating from the PSD as it evolves in time during growth. We find that for homoepitaxy of gallium arsenide (GaAs) on textured substrates, the time evolution follows the Kardar-Parisi-Zhang (KPZ) model [2].
Η απονομή της δικαιοσύνης μέσω της τεχνητής νοημοσύνης. Ηθικοί και νομικοί συλλογισμοί
Creators: name: Μαρκάτης, Γεώργιος Γρηγορίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2024
Subjects: Τεχνητή
Νοημοσύνη
Δικαιοσύνη
Artificial
Intelligence
Justice

description: Η παρούσα διπλωματική εργασία αποσκοπεί να παραθέσει τους προβληματισμούς όσον αφορά τη χρήση των συστημάτων Τεχνητής Νοημοσύνης, εφεξής Τ.Ν., στο χώρο απονομής της δικαιοσύνης. Αρχικά, αναλύεται η έννοια της Τ.Ν. μέσα από την παράθεση του ορισμού της καθώς παρατίθεται και μία σύντομη επισκόπηση της ιστορικής της εξέλιξης. Επιπλέον, διατυπώνονται οι τέσσερις προσεγγίσεις-θεωρίες όσον αφορά τη μελέτη της εν λόγω έννοιας. Επίσης, στο τρίτο κατά σειρά κεφάλαιο του παρόντος πονήματος περιγράφεται η σύνδεση των εφαρμογών και συστημάτων της Τ.Ν. στον τομέα της δικαιοσύνης καθώς και ορισμένες πρακτικές εφαρμογές ανά τους διαφόρους κλάδους του δικαίου. Στο επόμενο κατά σειρά κεφάλαιο, διατυπώνεται το υφιστάμενο νομοθετικό πλαίσιο γύρω από τα εν λόγω συστήματα, τόσο σε εθνικό όσο και σε ευρωπαϊκό-διεθνές επίπεδο. Στη συνέχεια, ο αναγνώστης έχει την ευκαιρία να κατανοήσει το τελικό αποτέλεσμα της νέας αυτής τεχνολογίας μέσα από ορισμένα δείγματα γραφής της νομολογιακής πρακτικής των δικαστηρίων. Το πέμπτο και έκτο κεφάλαιο ασχολείται με τους προβληματισμούς που γεννά η χρήση των μεθόδων και συστημάτων Τ.Ν., ηθικού και νομικού τύπου αντίστοιχα. Επιπλέον, το προτελευταίο μέρος του παρόντος πονήματος καταπιάνεται με την παράθεση των βασικών λύσεων και προτάσεων, ως προς αποφυγή άμβλυνσης των προεκτεθέντων ζητημάτων. Εν κατακλείδι, διατυπώνονται ορισμένες συμπερασματικές και κριτικές σκέψεις που δημιουργήθηκαν κατά τη δημιουργία της προκείμενης εργασίας.
description: This thesis aims to present the concerns regarding the use of Artificial Intelligence systems, hereinafter A.I., in the administration of justice. First, the concept of A.I. is analyzed, through the citation of its definition as well as a brief overview of its historical development. In addition, the four approaches-theories regarding the study of this concept are formulated. Also, in the third consecutive chapter of this work, the connection of A.I.'s applications and systems are described. in the field of justice as well as some practical applications across the various branches of law. In the next chapter in order, the existing legislative framework around these systems is formulated, both at national and European-international level. The reader then has the opportunity to understand the end result of this new technology through some writing samples of the jurisprudence of the courts. The fifth and sixth chapters deal with the problems raised by the use of A.I. methods and systems, moral and legal respectively. In addition, the penultimate part of this paper deals with listing the main solutions and proposals, in order to avoid mitigating the extrapolated issues. In conclusion, some concluding and critical thoughts that were created during the creation of the present work are formulated.
Viscous dissipative Chaplygin gas dominated homogenous and isotropic cosmological models
Creators: name: Pun, C. S. J.
name: Gergely, L. Á.
name: Mak, M. K.
name: Kovács, Z.
name: Szabó, G. M.
name: Harko, T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The generalized Chaplygin gas, which interpolates between a high density relativistic era and a non-relativistic matter phase, is a popular dark energy candidate. We consider a generalization of the Chaplygin gas model, by assuming the presence of a bulk viscous type dissipative term in the effective thermodynamic pressure of the gas. The dissipative effects are described by using the truncated Israel-Stewart model, with the bulk viscosity coefficient and the relaxation time functions of the energy density only. The corresponding cosmological dynamics of the bulk viscous Chaplygin gas dominated universe is considered in detail for a flat homogeneous isotropic Friedmann-Robertson-Walker geometry. For different values of the model parameters we consider the evolution of the cosmological parameters (scale factor, energy density, Hubble function, deceleration parameter and luminosity distance, respectively), by using both analytical and numerical methods. In the large time limit the model describes an accelerating universe, with the effective negative pressure induced by the Chaplygin gas and the bulk viscous pressure driving the acceleration. The theoretical predictions of the luminosity distance of our model are compared with the observations of the type Ia supernovae. The model fits well the recent supernova data. From the fitting we determine both the equation of state of the Chaplygin gas, and the parameters characterizing the bulk viscosity. The evolution of the scalar field associated to the viscous Chaplygin fluid is also considered, and the corresponding potential is obtained. Hence the viscous Chaplygin gas model offers an effective dynamical possibility for replacing the cosmological constant, and to explain the recent acceleration of the universe.
description: 14 pages, 9 figures, to appear in PRD
You Have a Point There: Object Selection Inside an Automobile Using Gaze, Head Pose and Finger Pointing
Creators: name: Aftab, Abdul Rafey
name: von der Beeck, Michael
name: Feld, Michael
Publisher: name: arXiv
Year: 2020
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Sophisticated user interaction in the automotive industry is a fast emerging topic. Mid-air gestures and speech already have numerous applications for driver-car interaction. Additionally, multimodal approaches are being developed to leverage the use of multiple sensors for added advantages. In this paper, we propose a fast and practical multimodal fusion method based on machine learning for the selection of various control modules in an automotive vehicle. The modalities taken into account are gaze, head pose and finger pointing gesture. Speech is used only as a trigger for fusion. Single modality has previously been used numerous times for recognition of the user's pointing direction. We, however, demonstrate how multiple inputs can be fused together to enhance the recognition performance. Furthermore, we compare different deep neural network architectures against conventional Machine Learning methods, namely Support Vector Regression and Random Forests, and show the enhancements in the pointing direction accuracy using deep learning. The results suggest a great potential for the use of multimodal inputs that can be applied to more use cases in the vehicle.
Atmosphere escape inferred from modelling the H$α$ transmission spectrum of WASP-121b
Creators: name: Yan, Dongdong
name: Guo, Jianheng
name: Huang, Chenliang
name: Xing, Lei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The escaping atmospheres of hydrogen driven by stellar X-ray and extreme Ultraviolet (XUV) have been detected around some exoplanets by the excess absorption of Ly$α$ in far ultraviolet band. In the optical band the excess absorption of H$α$ is also found by the ground-based instruments. However, it is not certain so far if the escape of the atmosphere driven by XUV can result in such absorption. Here we present the XUV driven hydrodynamic simulation coupled with the calculation of detailed level population and the process of radiative transfer for WASP-121b. Our fiducial model predicts a mass loss rate of $\sim$1.28$\times$10$^{12}$g/s for WASP-121b. Due to the high temperature and Ly$α$ intensity predicted by the fiducial model, many hydrogen atoms are populated into the first excited state. As a consequence, the transmission spectrum of H$α$ simulated by our model is broadly consistent with the observation. Comparing with the absorption of H$α$ at different observation times, the stellar XUV emission varies in the range of 0.5-1.5 times fiducial value, which may reflect the variation of the stellar activity. Finally, we find that the supersonic regions of the planetary wind contribute a prominent portion to the absorption of H$α$ by comparing the equivalent width of H$α$, which hints that a transonic outflow of the upper atmosphere driven by XUV irradiation of the host star can be detected by the ground-based telescope and the H$α$ can be a good indicator of escaping atmosphere.
description: 14 pages, 6 figures. Accepted for publication in ApJL. Typing errors corrected
The Singular Ideal and the Socle of Incidence Algebras
Creators: name: Kanuni, Muge
name: Ozkan, Ozkay
Publisher: name: arXiv
Year: 2020
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 16D25

description: Let $R$ be a ring with identity and $I(X,R)$ be the incidence algebra of a locally finite partially ordered set $X$ over $R.$ In this paper, we compute the socle and the singular ideal of the incidence ring for some $X$ in terms of the socle of $R$ and the singular ideal of $R$, respectively.
description: 23 pages
Η φυσιογνωμία του Σωκράτη με επίκεντρο την Απολογία του
Creators: name: Δραγκιώτη, Φλωρεντία Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Σωκράτης
Απολογία
Πλάτων
Socratis
Apoloty
Platon

description: Ο φιλόσοφος Σωκράτης μέσα από τα έργα του Πλάτωνα, αναδεικνύεται ως ένας από τους σπουδαιότερους ανθρώπους της εποχής του αλλά και όλων των εποχών.Η φυσιογνωμία του μέσα από το έργο του Πλάτωνος "Απολογία Σωκράτους"σκιαγραφείται με αξεπέραστο τρόπο. Προβάλλεται η πρωτοτυπία της φιλοσοφίας του μεγάλου δασκάλου, οι καινοτομίες του έργου του και τονίζεται ο άδικος και δυσαναπλήρωτος θάνατός του
description: Socrates, the philosopher especially in the books that Platon wrote, is one of the greatest men of his season and all of the ages. His physiognomy into Platon's "The apology of Socrates" is given in a way that cannot be passed. He gives the characteristics of the philosophy of the great teacher in an uncommon way and insist in his unpleasant death
Electromagnetic Corrections in Partially Quenched Chiral Perturbation Theory
Creators: name: Bijnens, Johan
name: Danielsson, Niclas
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We introduce photons in Partially Quenched Chiral Perturbation Theory and calculate the resulting electromagnetic loop-corrections at NLO for the charged meson masses and decay constants. We also present a numerical analysis to indicate the size of the different corrections. We show that several phenomenologically relevant quantities can be calculated consistently with photons which couple only to the valence quarks, allowing the use of gluon configurations produced without dynamical photons.
description: 11 pages
Generic Optical Singularities in Brewster-reflected Post-paraxial Beam-fields
Creators: name: Debnath, Anirban
name: Viswanathan, Nirmal K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Brewster-reflection of a post-paraxial optical beam at a plane dielectric interface unravels fundamentally significant optical singularity dynamics. We express the simulated field-component profiles of a Brewster-reflected post-paraxial beam-field via empirical functions, using which we demonstrate optical beam-shifts and formation of phase singularities. These occurrences naturally reveal the presence and complex transitional-dynamics of generic polarization-singularities -- which we observe via simulation and experiments. A single reflection being the core process, our method becomes a fundamentally appealing way to generate optical singularities and to study their dynamics.
description: 9 pages, 7 figures
Μελέτη οργάνωσης και επεξεργασίας μεγάλων γράφων σε δευτερεύουσα μνήμη
Creators: name: Κοκκινίδης, Βασίλειος Παναγιώτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Χωρικά δίκτυα δεδομένων
Μέθοδοι προσπέλασης
Υπολογισμοί πάνω σε δίκτυα
Χωρικές βάσεις δεδομένων
Spatial networks
Access methods
Network computations
Spatial databases

description: Παρατηρείται τελευταία ολοένα και αυξανόμενο ερευνητικό ενδιαφέρον για μεθόδους αποδοτική προσπέλασης και διαχείρισης των δικτύων χωρικών δεδομένων, που μοντελοποιούνται ως ισχυρά συνεκτικοί γράφοι. Ζητούμενο είναι η αποτελεσματική υποστήριξη σε πράξεις έως τα συναθροιστικά ερωτήματα. Οι προϋπάρχουσες ερευνητικές προτάσεις δεν εκμεταλλεύονται την συνεκτικότητα των δικτύων που μας ενδιαφέρουν. Οι Shashi Shekhat και D.R. Liu πρότειναν μια ολοκληρωμένη μέθοδο προσπέλασης, την "Connectivity-clustered Access Method" η οποία αυξάνει το ποσοστό ανακτήσεων από την κύρια μνήμη, μειώνοντας το κόστος Ι/0 προσπέλασης στη δευτερεύουσα μνήμη. Η παρούσα εργασία αξιολογεί το CCAM σε σχέση με τις άλλες προτάσεις. Παρέχονται πειραματικά αποτελέσματα που τονίζουν τα πλεονεκτήαμτα της συγκεκριμένης μεθόδου και αναλύονται με σκοπό την βελτίωσή της
description: There is a current research trend towards the discovery of efficient storage and access methods for spatial networks which can be modeled as strongly connected graphs. The main goal is to efficiently support aggregate queries on such networks. A key observation is the fact that existing research does not take advantage of the connectivity properties of graphs. S. Shekhar and D.R. Liu have proposed "Connectivity-Clustered Accus Method" which increases the ration of the successfulf retrieval from main memory, thus reducing the expected I/O cost in secondary storage. The current thesis evaluated ECAM. Experimental results stating its superiority are provided and discusses in an effort to further improve it
Same-sign single dilepton productions at the LHC
Creators: name: Chen, Chian-Shu
name: Geng, Chao-Qiang
name: Zhuridov, Dmitry V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We examine the same-sign single dilepton productions of $\ell_i^{\pm}\ell_j^{\pm} (\ell_{i,j}=e,μ)$ in high-energy proton-proton collisions at the Large Hadron Collider (LHC) in models with doubly charged Higgs scalars as well as heavy Majorana neutrinos. We demonstrate that these spectacular productions can be detected at the LHC for a class model in which the doubly charged Higgs scalars couple only to the right-handed charged leptons. The ranges of the possible doubly charged Higgs masses and mixings to observe the processes at the LHC are discussed.
description: 10 pages, 5 figures
Mito sobre Yompor Santo, Nuestro Padre Santo
Creators: name: Quinchuya López, Amador
name: Santos Granero, Fernando
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: ame

description: Personaje mítico relacionado con la figura histórica de Juan Santos Atahuallpa. Transcrito, traducido, mecanografiado y digitalizado.
Green natural zeolite catalyst-preparation, characterization and acid catalytic performance
Creators: name: Muhammad, Riaz
Publisher: name: Universität Rostock
Year: 2018
Subjects: subject: 540 Chemistry & allied sciences

description: Natural clinoptilolite zeolite-CLIN was acidified by ammonium ion exchange followed by calcination and HCl treatment under soft conditions. The influence of the modification type and treatment conditions on the structure, morphology and acidity was studied by XRD, SEM, FTIR, ICP-AES, TG/DSC, ammonia-TPD, 1H, 27Al and 29SI MAS NMR and N2-ads-des. High temperature calcination of NH4-CLIN and concentrated acid has a more severe impact on the clinoptilolite structure. H-CLIN catalysts are potential and active acid catalysts and synthesis-structure-porosity-acidity-activity relationship was found.
O-device: ενα αντικειμενοστραφές σύστημα συμπερασμών για Owl lite οντολογίες
Creators: name: Μεδίτσκος, Γεώργιος Πέτρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Αντικειμενοστραφές μοντέλο
Owl οντολογίες
Σύστημα συμπερασμού
Σημασιολογία διαδίκτυο
Κανόνες παραγωγής
Object-oriented model
Owl ontologies
Reasoning system
Semantic web
Production rules

description: Σε αυτή την εργασία παρουσιάζουμε ένα σύστημα συμπερασμού, το O-device. Το O-device είναι ένα σύστημα βασισμένο σε κανόνες παραγωγής (Production rules) για την υλοποίηση της διαδικασίας συμπερασμού σε οντολογίες εκφρασμένες στην Owl. Υπάρχει ένα σύνολο της OWL το οποίο μπορεί να μετατραπεί σε κανόνες Horn, το οποίο αναφέρεται ως DLP(Description Logic Programs), επιτρέποντας τη χρήση γλωσσών κανόνων για το χειρισμό του. Βασισμένα σε αυτό το υποσύνολο για την OWL και στους συμπερασματικούς κανόνες της (entailment rules), χρησιμοποιούμε ένα ήδη υπάρχον σύστημα κανόνων, το CLIPS και εκμεταλλευόμενοι την ταχύτητά του και την αποδοτικότητά του, ορίζουμε μια διαδικασία αντιστοίχισης την OWL οντολογίων σε ένα αντικειμενοστραφές σχήμα. Στην υλοποίησή μας καλύπτουμε τόσο το DLP υποσύνολο της OWL όσο και την πλήρη γλώσσα OWL life
description: In this work we present O-device, a reasoning system for Owl life ontologies. O-device uses production rules in order to perform inferencing. There is a subject of the PWL referred as DLP(Description Logic Programs) that allows the utilization of the rule languages. Based on this subset and on the effort to define entailment rules for OWL, we use an existing rule system, called CLIPS and we defien a mapping procedure of OWL constructs and semantics into an Object-oriented schema. The implementation covers the DLP subset as well as the complete OWL Life language
Orthogonality for $(0,-1)$ tropical normal matrices
Creators: name: Bakhadly, Bakhad
name: Guterman, Alexander
name: de la Puente, María Jesús
Publisher: name: arXiv
Year: 2020
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 15B33, 14T10, 15A80

description: We study pairs of mutually orthogonal normal matrices with respect to tropical multiplication. Minimal orthogonal pairs are characterized. The diameter and girth of three graphs arising from the orthogonality equivalence relation are computed.
Well-Balanced and Asymptotic Preserving IMEX-Peer Methods
Creators: name: Schneider, Moritz
name: Lang, Jens
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65L04, 65L06, 65M20

description: Peer methods are a comprehensive class of time integrators offering numerous degrees of freedom in their coefficient matrices that can be used to ensure advantageous properties, e.g. A-stability or super-convergence. In this paper, we show that implicit-explicit (IMEX) Peer methods are well-balanced and asymptotic preserving by construction without additional constraints on the coefficients. These properties are relevant when solving (the space discretisation of) hyperbolic systems of balance laws, for example. Numerical examples confirm the theoretical results and illustrate the potential of IMEX-Peer methods.
description: 8 pages, 1 figure
Spin current and rectification in one-dimensional electronic systems
Creators: name: Braunecker, Bernd
name: Feldman, D. E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Spin and charge currents can be generated by an ac voltage through a one-channel quantum wire with strong electron interactions in a static uniform magnetic field. In a certain range of low voltages, the spin current can grow as a negative power of the voltage bias as the voltage decreases. The spin current expressed in units of hbar/2 per second can become much larger than the charge current in units of the electron charge per second. The system requires neither spin-polarized particle injection nor time-dependent magnetic fields.
description: 5 pages, 2 figures
Design studies on the axial injection system of the cyclone-44 cyclotron
Creators: name: Lachinov, Mikhail V.
Publisher: name: University of British Columbia
Year: 2009

description: A comprehensive feasibility study of axial injection has been carried out for a compact cyclotron (CYCLONE-44) which the University of Louvain-la-Neuve is building as a post-accelerator/ separator for radioactive ion beams. To achieve a high overall injection efficiency it is necessary to ensure proper 6D beam matching of the injected beam to the cyclotron central region. The results presented encompass all major aspects of a working system: 4D phase-space matching, injection trajectories, spiral inflector calculations, beam bunching in spiral inflectors, choice of the bunching system and discussion of the possible approaches to resolving trade-offs in the 6D matching problem. We began by optimizing the transverse (4D) phase-space matching by reducing the emittance growth that results from the mismatch of the beam emittance with respect to the cyclotron eigenellipses, when the beam is injected by means of a spiral inflector. The matching procedure was based on the method implemented in the TRANSOPTR beam optics code. Results are presented for various sizes and tilts of the inflector and for various shapes and orientations of the cyclotron eigenellipses. Specific results for the CYCLONE-44 cyclotron are also presented. The technique used to generate inflector transfer matrices is described. Since we assumed linear optics in the inflector it was important to ensure that the derived transfer matrices were consistent with the laws of Hamiltonian mechanics and represented a real physical problem. This goal was achieved by performing 15 tests proving compliance with the symplectic conditions imposed on a (6 x 6) transfer matrix. Using semi-analytical methods, involving transfer matrix techniques, the first-order effect of a spiral inflector on the beam's longitudinal phase space was studied. The conditions for obtaining minimized bunch lengths at the inflector exit were derived. Consistent with some earlier publications, the time spread of the beam at the inflector exit for the large injected emittances required in this application was significant. It is shown that this result is a direct consequence of the inflector optics. To enhance the cyclotron acceptance of the dc beam, several bunching systems were considered with particular emphasis given to a linear buncher modulated by ideal sawtooth waveform and a double-drift bunching system consisting of two double-gap sinusoidal bunchers. Finally, since the overall goal of this work was to maximize the amount of beam that could be injected into the cyclotron, a trade-off between transverse and longitudinal beam matching was considered. As the beam sizes in the inflector increase, so do the non-linear effects, and it becomes harder to get clean transverse emittances at the entrance to the cyclotron's central region. Therefore it seems prudent to put more emphasis on obtaining good longitudinal capture into the cyclotron and limit the injected beam emittances to about 15-20 mm-mrad.
Diagnosing a Solar Flaring Core with Bidirectional Quasi-Periodic Fast Propagating Magnetoacoustic Waves
Creators: name: Miao, Yuhu
name: Li, Dong
name: Yuan, Ding
name: Jiang, Chaowei
name: Elmhamdi, Abouazza
name: Zhao, Mingyu
name: Anfinogentov, Sergey
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Quasi-periodic fast propagating (QFP) waves are often excited by solar flares, and could be trapped in the coronal structure with low Alfvén speed, so they could be used as a diagnosing tool for both the flaring core and magnetic waveguide. As the periodicity of a QFP wave could originate from a periodic source or be dispersively waveguided, it is a key parameter for diagnosing the flaring core and waveguide. In this paper, we study two QFP waves excited by a GOES-class C1.3 solar flare occurring at active region NOAA 12734 on 8 March 2019. Two QFP waves were guided by two oppositely oriented coronal funnel. The periods of two QFP waves were identical and were roughly equal to the period of the oscillatory signal in the X-ray and 17 GHz radio emission released by the flaring core. It is very likely that the two QFP waves could be periodically excited by the flaring core. Many features of this QFP wave event is consistent with the magnetic tuning fork model. We also investigated the seismological application with QFP waves, and found that the magnetic field inferred with magnetohydrodynamic seismology was consistent with that obtained in magnetic extrapolation model. Our study suggest that the QFP wave is a good tool for diagnosing both the flaring core and the magnetic waveguide.
description: ApJL,10 pages,5 figures
Δίκαιο του ηλεκτρονικού εμπορίου. Η ευθύνη των φορέων παροχής υπηρεσιών
Creators: name: Σαββίδου, Ολγα Ευαγγέλου
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: subject: Ηλεκτρονικό εμπόριο
subject: Ευθύνη
subject: Φορέας παροχής υπηρεσιών
subject: Δίκαιο
subject: Διαδίκτυο
subject: Νομοθεσία
subject: E-commerce
subject: Liability
subject: Internet service provider
subject: Law
subject: FOS: Law
subject: Internet
subject: Legislation

description: Η παγκόσμια εξάπλωση του internet έχει επιφέρει δραστικές αλλαγές στη δομή και τη λειτουργία ολόκληρης της κοινωνίας. Δημιούργησε πολλές ευκαιρίες ολόκληρης της κοινωνίας. Δημιούργησε πολλές ευκαιρίες για εξέλιξη και ανάπτυξη, αλλά ταυτόχρονα γέννησε πολλούς νέους κινδύνους. Το ηλεκτρονικό εμπόριο αποτελεί ένα από τα θετικά αποτελέσματα του διαδικτύου, ωστόσο προέκυψαν πολλά νομικά προβλήματα λόγω της διασυνοριακής φύσης των συναλλαγών. Η εργασία παρουσιάζει την κοινοτική οδηγία και το προεδρικό διάταγμα που ψηφίστηκαν για τη ρύθμιση των νομικών αυτών προβλημάτων, και εστιάζει στην ενδεχόμενη αξιόποινη συμπεριφορά των φορέων παροχής υπηρεσιών στα πλαίσια της κοινωνίας της πληροφορίας, όπως αυτοί ορίζονται στις εν λόγω διατάξεις
description: The world spread of internet has brought drastic changes in the structure and the operation of entire society. It created a lot of occasions for development and growth, but it also gave birth to many new dangers. The electronic commerce constitutes one from the positive results of internet, however arised a lot of legal problems because of the cross-border nature of the transactions. The essay presents the e-commerce directive 2000/31/EC and the degree-law that were voted for the regulation of these legal problems, and it focuses in the potential criminal behaviour of the internet service providers
Huygens' principle and anomalously small radiation tails
Creators: name: Bizoń, Piotr
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This is a short account of recent joint work with T. Chmaj and A. Rostworowski on asymptotic behavior of linear and nonlinear waves, as presented at the conference devoted to Myron Mathisson held at the Banach Center, Warsaw 2007.
description: 9 pages, for the proceedings of the Mathisson conference held in Warsaw, 2007
Joint H-alpha and X-ray Observations of Massive X-ray Binaries. I. The B-Supergiant System LS I +65 010 = 2S 0114+650
Creators: name: Grundstrom, E. D.
name: Blair, J. L.
name: Gies, D. R.
name: Huang, W.
name: McSwain, M. V.
name: Raghavan, D.
name: Riddle, R. L.
name: Subasavage, J. P.
name: Wingert, D. W.
name: Levine, A. M.
name: Remillard, R. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on a three year spectroscopic monitoring program of the H-alpha emission in the massive X-ray binary LS I +65 010 = 2S 0114+650, which consists of a B-supergiant and a slowly rotating X-ray pulsar. We present revised orbital elements that yield a period of P=11.5983 +/- 0.0006 d and confirm that the orbit has a non-zero eccentricity e=0.18 +/- 0.05. The H-alpha emission profile is formed in the base of the wind of the B-supergiant primary, and we show how this spectral feature varies on timescales that are probably related to the rotational period of the B-supergiant. We also examine the X-ray fluxes from the Rossi X-ray Timing Explorer All-Sky Monitor instrument, and we show that the X-ray orbital light curve has a maximum at periastron and a minimum at the inferior conjunction of the B-supergiant. We also show that the wind emission strength and the high energy X-ray flux appear to vary in tandem on timescales of approximately a year.
description: accepted to ApJ, 19 pages including 6 figures and 3 tables
Meet homological mirror symmetry
Creators: name: Ballard, Matthew Robert
Publisher: name: arXiv
Year: 2008
Subjects: subject: Algebraic Geometry (math.AG)
subject: Category Theory (math.CT)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics

description: In this paper, we introduce the interested reader to homological mirror symmetry. After recalling a little background knowledge, we tackle the simplest cases of homological mirror symmetry: curves of genus zero and one. We close by outlining the current state of the field and mentioning what homo- logical mirror symmetry has to say about other aspects of mirror symmetry.
description: 34 pages. Published version. Comments still very welcome
Gamma-Ray Burst afterglows as probes of environment and blastwave physics I: absorption by host galaxy gas and dust
Creators: name: Starling, R. L. C.
name: Wijers, R. A. M. J.
name: Wiersema, K.
name: Rol, E.
name: Curran, P. A.
name: Kouveliotou, C.
name: van der Horst, A. J.
name: Heemskerk, M. H. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We use a new approach to obtain limits on the absorbing columns towards an initial sample of 10 long Gamma-Ray Bursts observed with BeppoSAX and selected on the basis of their good optical and nIR coverage, from simultaneous fits to nIR, optical and X-ray afterglow data, in count space and including the effects of metallicity. In no cases is a MW-like extinction preferred, when testing MW, LMC and SMC extinction laws. The 2175A bump would in principle be detectable in all these afterglows, but is not present in the data. An SMC-like gas-to-dust ratio or lower value can be ruled out for 4 of the hosts analysed here (assuming SMC metallicity and extinction law) whilst the remainder of the sample have too large an error to discriminate. We provide a more accurate estimate of the line-of-sight extinction and improve upon the uncertainties for the majority of the extinction measurements made in previous studies of this sample. We discuss this method to determine extinction values in comparison with the most commonly employed existing methods.
description: 25 pages, 5 figures, ApJ accepted. Minor revisions to Table 1, Sections 4.1.4 and 5.1.5
Starlight coupling through atmospheric turbulence into few-mode fibers and photonic lanterns in the presence of partial adaptive optics correction
Creators: name: Diab, Momen
name: Dinkelaker, Aline N.
name: Davenport, John
name: Madhav, Kalaga
name: Roth, Martin M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Starlight corrupted by atmospheric turbulence cannot couple efficiently into astronomical instruments based on integrated optics as they require light of high spatial coherence to couple into their single-mode waveguides. Low-order adaptive optics in combination with photonic lanterns offer a practical approach to achieve efficient coupling into multiplexed astrophotonic devices. We investigate, aided by simulations and an experimental testbed, the trade-off between the degrees of freedom of the adaptive optics system and those of the input waveguide of an integrated optic component leading to a cost-effective hybrid system that achieves a signal-to-noise ratio higher than a standalone device fed by a single-mode fiber.
description: 12 pages, 10 figures
Impact of income inequality on socio-economic developpement in morocco : Evaluation using a micro-macro analysis (CGE Model)
Creators: name: CHTOUKI, Zakaria
Publisher: name: Zenodo
Year: 2022
Subjects: income inequlity
CGE model
Socioeconomic impact
Developing economy

description: Abstract - Although the world has experienced increased affluence, disparities among its inhabitants have continued to rise, reshaping our understanding of the concept of "poverty". This executive summary of my thesis dissertation presents a condensed version of a comprehensive theoretical and empirical inquiry into the socioeconomic ramifications of income inequality on the stability of a developing economy, specifically the Moroccan economy. The theoretical segment of this research involves an exploration of the underlying theories surrounding income inequality in order to conceptualize its influence on economic advancement. The empirical component is bifurcated into two distinct phases, an exploratory phase and a modeling phase. The former stage is concerned with assessing the dynamic nature of inequality in Morocco and identifying the factors contributing to its growth. The latter phase employs a static ECG model, calibrated on Moroccan SAM 2016, to simulate multiple scenarios in order to scrutinize the socioeconomic impacts of a mere 1% increase in income inequality. Our results reveal that a 1% increase in inequality precipitates a 1.73% decline in GDP.

Keywords : Income inequality, socioeconomic impact, developing economy, fiscal policy, CGE model.

JEL CODE : C68, D63, E62, H31
description: Note : This document is an executive summary of the author's thesis, aimed at providing a concise version of the study. The findings of this research have been published in the indexed Scopus journal "Statistika" (Issue No. 1/2023, published on March 17, 2023).
Early Formation of Dust in the Ejecta of Type Ib SN 2006jc and Temperature and Mass of the Dust
Creators: name: Nozawa, T.
name: Kozasa, T.
name: Tominaga, N.
name: Sakon, I.
name: Tanaka, M.
name: Suzuki, T.
name: Nomoto, K.
name: Maeda, K.
name: Umeda, H.
name: Limongi, M.
name: Onaka, T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: SN 2006jc is a peculiar supernova (SN), in which the formation of dust has been confirmed at an early epoch of ~50 days after the explosion. We investigate the possibility of such an earlier formation of dust grains in the expanding ejecta of SN 2006jc, applying the Type Ib SN model that is developed to reproduce the observed light curve. We find that the rapid decrease of the gas temperature in SN 2006jc enables the condensation of C grains in the C-rich layer at 40-60 days after the explosion, which is followed by the condensation of silicate and oxide grains until ~200 days. The average radius of each grain species is confined to be less than 0.01 micron due to the low gas density at the condensation time. The calculated total dust mass reaches ~1.5 Msun, of which C dust shares 0.7 Msun. On the other hand, based on the calculated dust temperature, we show that the dust species and mass evaluated to reproduce the spectral energy distribution observed by AKARI and MAGNUM at day 200 are different from those obtained by the dust formation calculations; the dust species contributing to the observed flux are hot C and FeS grains with masses of $5.6 \times 10^{-4}$ Msun and $2.0 \times 10^{-3}$ Msun, respectively, though we cannot defy the presence of a large amount of cold dust such as silicate and oxide grains up to 0.5 Msun. One of the physical processes responsible for the difference between calculated and evaluated masses of C and FeS grains could be considered to be the destruction of small-sized clusters by energetic photons and electrons prevailing within the ejecta at the earlier epoch.
description: 25 pages including 6 figures and 1 table. Accepted for publication in ApJ
Θεωρητική μελέτη λοβαστατίνης. Συναρμογή με νουκλεοβάσεις, νουκλεοτίδια και αμινοξέα. Συναγωνιστική αναστολή της HMG-CoA αναγωγάσης
Creators: name: Περτσεμλή, Ελένη Ευαγγέλου
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Λοβαστατίνη
HMG-CoA αναγωγάση
Ab initio μέθοδοι
Hartree-fock
Στατίνες
Μοριακή μηχανική
Lovastatin
HMG-CoA reductase
Ab initio methods
Statins
Molecular mechanics

description: Η λοβαστατίνη είναι ένα γνωστό αντιχοληστερολαιμικό φάρμακο που ανήκει στην κατηγορία των στατινών. Εχει αποδειχθεί η πιθανή αντικαρκινική της δράση μέσω συναρμογής της με νουκλεοβάσεις. Στην παρούσα εργασία δίνεται ο τρόπος συναρμογής της με νουκλεοβάσεις, νουκλεοτίδια και αμινοξέα. Εχει την ιδιότητα να αναστέλλει την δράση της με HMG-CoA αναγωγάσης
description: Lovastatin is a well known anticholesterol pharmaceutical agent, of the statins family. It his shown it's anticancer action by making addicts with aminoacids and nucleotides. It has the ability to inhibit HMG-CoA reductases action by competitive inhibition
Impact of income inequality on socio-economic developpement in morocco : Evaluation using a micro-macro analysis (CGE Model)
Creators: name: CHTOUKI, Zakaria
Publisher: name: University Mohammed V - Rabat
Year: 2022
Subjects: income inequlity
CGE model
Socioeconomic impact
Developing economy
fiscal policy

description: Abstract - Although the world has experienced increased affluence, disparities among its inhabitants have continued to rise, reshaping our understanding of the concept of "poverty". This executive summary of my thesis dissertation presents a condensed version of a comprehensive theoretical and empirical inquiry into the socioeconomic ramifications of income inequality on the stability of a developing economy, specifically the Moroccan economy. The theoretical segment of this research involves an exploration of the underlying theories surrounding income inequality in order to conceptualize its influence on economic advancement. The empirical component is bifurcated into two distinct phases, an exploratory phase and a modeling phase. The former stage is concerned with assessing the dynamic nature of inequality in Morocco and identifying the factors contributing to its growth. The latter phase employs a static ECG model, calibrated on Moroccan SAM 2016, to simulate multiple scenarios in order to scrutinize the socioeconomic impacts of a mere 1% increase in income inequality. Our results reveal that a 1% increase in inequality precipitates a 1.73% decline in GDP.

Keywords : Income inequality, socioeconomic impact, developing economy, fiscal policy, CGE model.

JEL CODE : C68, D63, E62, H31
description: Note - This executive summary highlights the key findings of the author's thesis. The research was presented at the annual Global Economic Analysis Conference, organized by the Global Trade Analysis Project (GTAP) in collaboration with UNECA, and published in the Scopus-indexed journal Statistika (Issue 1/2023, March 17, 2023).
Η παιδεία στην αυτοκρατορία της Νίκαιας (1204-1261)
Creators: name: Σχοινάς, Παναγιώτης Χαριλάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Η εκπαιδευτική πολιτική των Λασκάρεων
Νικηφόρος Βλεμμύδης
Σχολεία Μέσης Εκπαίδευσης
Σχολή Αγίου Τρύφωνος
Μαθητές
Καθηγητές
Nicephorus Blemmydes
Schools of Higher Education
University of Saint Tryphon
Students
Teachers, professors

description: Στην αυτοκρατορία της Νίκαιας (1204-1261) οι βυζαντινοί επανασύστασαν το εκπαιδευτικό σύστημα που υπήρχε στην Πόλη προ του 1204. Ο Θεόδωρος Α' Λάσκαρις μετά το 1208 επαναλειτούργησε το εκπαιδευτικά αξιώματα του υπάτου των φιλοσόφων και των τριών διδασκάλων του Ευαγγελίου του Αποστόλου και του Ψαλτήρος. Στην Νίκαια μορφώθηκε και έδρασε ο Νικηφόρος Βλεμμύδης, ο οποίος υπήρξε ιερομόναχος και καθηγητής. Ο Ιωάννης Γ' χρηματοδότησε το σχολείο τοτ Γεώργιου Βαβουσκωμίτη, και διόρισε τον Ιωάννη Εξαπτέρυγο και Νικηφόρο Βλεμμύση ως καθηγητές των αρχοντόπουλων. Ο Θεόδωρος Β' ήταν περισσότερο λόγιος παρά αυτοκράτορας. Ιδρυσε τη Σχολή του Αγ. Τρύφωνος όπου δίδασκαν ο Μιχαήλ Σεναχερείμ και ο Ιωάννης Φραγγόπουλος. Εξέταζε τους δημόσιους υπάλληλους και τους μαθητές. Μετά τον θάνατο του Θεόδωρο β', δύο μαθητές της σχολής του Αγ. Τρύφωνος, ο Γρηγόριος Κύπριος και Μανουήλ Ολόβολος αναφέρουν ότι η σχολή παρήκμησε
description: In Nicaean Empire, Byzantines recreated the education system which was existed in Constantinople before 1204. Theodorus A' Laskaris recreated the educational officials after 1208 Nicephorus Blemmydes who was priest and professor, was educated and acted in Nicaea. John I' Vatatzes gave money to the scholls of highers education, one of them was the school of George Babouscomites. Theodorous 2th was more scholar than emperor. He found the University of S. Tryphon, where Michael Senacherim and John Gragopoulos were teaching. Theodorus 2th examined the public empoyers and the students. After the death of Theodorus 2th students, Gregorius St Cyprus and Manouel Holobolos reported that the University was in darestrate