cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Examination of Flavor Symmetry in $B, B_s \to K π$ Decays
Creators: name: Chiang, Cheng-Wei
name: Gronau, Michael
name: Rosner, Jonathan L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study a relation between the weak phase $γ$ and the rates and CP asymmetries of several $K π$ decays of $B^+$, $B^0$, and $B_s$, emphasizing the impact of the latter measurements. Current data indicate large SU(3) breaking in the strong phases or failure of factorization (including its application to penguin amplitudes) in $K π$ modes of $B^0$ and $B_s$. SU(3) and factorization only remain approximately valid if the branching ratio for $B_s \to K^- π^+$ exceeds its current value of $(5.27 \pm 1.17) \times 10^{-6}$ by at least 42%, or if a parameter $ξ$ describing ratios of form factors and decay constants is shifted from its nominal value by more than twice its estimated error.
description: 10 pages, 4 figures. Misprints in some exponents corrected; one experimental value and some discussion updated
Determining Distances to Clusters of Galaxies using Resonant X-ray Emission Lines
Creators: name: Molnar, S. M.
name: Birkinshaw, M.
name: Mushotzky, R. F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Bright clusters of galaxies can be seen out to cosmological distances, and thus they can be used to derive cosmological parameters. Although the continuum X-ray emission from the intra-cluster gas is optically thin, the optical depth of resonant lines of ions of heavy elements can be larger than unity. In this Letter we study the feasibility of deriving distances to clusters of galaxies by determining the spatial distribution of the intra-cluster gas from X-ray imaging and the optical depth from resonant emission lines (the XREL method). We solve the radiative transfer problem for line scattering in the hot intra-cluster gas using Monte Carlo simulations. We discuss the spatial and spectral resolutions needed to use the XREL method for accurate determination of distances, and hence cosmological parameters, and show that accurate distances will be obtained by applying this technique with the next generation of high resolution X-ray spectrometers.
description: LateX, 4 pages, 2 figures, accepted for publication in The Astrophysical Journal Letters
Rethinking the Definition of Rate-Induced Tipping
Creators: name: Hoyer-Leitzel, Alanna
name: Nadeau, Alice
Publisher: name: arXiv
Year: 2021
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: The current definition of rate-induced tipping is tied to the idea of a pullback attractor limiting in forward and backward time to a stable quasi-static equilibrium. Here we propose a new definition that encompasses the standard definition in the literature for certain scalar systems and includes previously excluded $N$-dimensional systems that exhibit rate-dependent critical transitions.
description: 11 pages, 5 figures
Στρατηγικές για την ανάπτυξη του οπτικού γραμματισμού σε παιδιά προσχολικής ηλικίας μέσω της ανάγνωσης εικονοβιβλίων
Creators: name: Ζαφειρίου, Γερακίνα Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Οπτικός γραμματισμός
Προσχολική ηλικία
Εικονοβιβλία
Visual literacy
Preschool education
Picturebooks

description: Η παρούσα διπλωματική εργασία εστιάζει σε στρατηγικές διδασκαλίας και στην εφαρμογή δραστηριοτήτων, που θεωρούνται κατάλληλες για παιδιά προσχολικής ηλικίας, προκειμένου να αναπτύξουν την ικανότητα του οπτικού γραμματισμού. Στο θεωρητικό πλαίσιο γίνεται αναφορά στους όρους “παιδική λογοτεχνία”, “εικονογραφημένο βιβλίο”, “εικονοβιβλίο”, “οπτικός γραμματισμός”, “τροπικότητα” και “πολυτροπικότητα”. Επιπλέον, επισημαίνονται τα οφέλη της ανάγνωσης των εικόνων, αλλά και των εικονογραφημένων βιβλίων. Τέλος, προσδιορίζονται τα ιδιαίτερα χαρακτηριστικά του νηπίου-αναγνώστη. Στο επόμενο μέρος της εργασίας παρουσιάζεται η έρευνα που πραγματοποιήθηκε σε ένα τμήμα νηπιαγωγείου και τα αποτελέσματά της. Η μεθοδολογία που ακολουθήθηκε είναι η μεθοδολογική τριγωνοποίηση και η τριγωνοποίηση δεδομένων. Τα εργαλεία που χρησιμοποιήθηκαν για τη συλλογή των δεδομένων είναι το ερωτηματολόγιο, η προσωπική συνέντευξη, το προσωπικό ημερολόγιο της ερευνήτριας και η παρατήρηση. Η προσέγγιση που προτείνεται βασίζεται στην ανάγνωση εικονοβιβλίων, καθώς ο λεκτικός και ο εικονιστικός κώδικας που συνυπάρχουν σ’ αυτού του είδους τα βιβλία, μεταφέρουν συχνά διαφορετικές ή και αντιφατικές μεταξύ τους πληροφορίες.
description: The present thesis focuses on teaching strategies and the application of activities, which are considered suitable for pre-school children, so that these children can develop the skills needed for visual literacy. The theory involves the following terms: “children literature”, “illustrated book”, “picturebook”, “visual literacy”, “tropicality” and “multi-tropicality”. In addition, the benefits of reading pictures and picturebooks are clearly outlined along with the special characteristics of the infant-readers which are also defined. In the following part of the thesis, there is the presentation of a research conducted in a kinder garden class, with the conclusions drawn. The methodology used is the methodological triangulation and the triangulation of the data. Questionnaires, personal interviews, the teacher’s journal and observations are the tools used. The suggested approach is based on reading picturebooks, as well as the verbal and picture codes that co-exist in this kind of books, conveying different or contradicted information.
Lyman Alpha Emitters at Redshift 5.7 in the COSMOS Field
Creators: name: Murayama, T.
name: Taniguchi, Y.
name: Scoville, N. Z.
name: Ajiki, M.
name: Sanders, D. B.
name: Mobasher, B.
name: Aussel, H.
name: Capak, P.
name: Koekemoer, A.
name: Shioya, Y.
name: Nagao, T.
name: Carilli, C.
name: Ellis, R. S.
name: Garilli, B.
name: Giavalisco, M.
name: Kitzbichler, M. G.
name: LeFevre, O.
name: Maccagni, D.
name: Schinnerer, E.
name: Smolcic, V.
name: Tribiano, S.
name: Cimatti, A.
name: Komiyama, Y.
name: Miyazaki, S.
name: Sasaki, S. S.
name: Koda, J.
name: Karoji, H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present results from a narrow-band optical survey of a contiguous area of 1.95 deg^2, covered by the Cosmic Evolution Survey (COSMOS). Both optical narrow-band (lambda_c = 8150 AA and Delta_lambda = 120 AA) and broad-band (B, V, g', r', i', and z') imaging observations were performed with the Subaru prime-focus camera, Suprime-Cam on the Subaru Telescope. We provide the largest contiguous narrow-band survey, targetting Ly alpha emitters (LAEs) at z~5.7. We find a total of 119 LAE candidates at z~5.7. Over the wide-area covered by this survey, we find no strong evidence for large scale clustering of LAEs. We estimate a star formation rate (SFR) density of ~7*10^-4 M_sun yr^-1 Mpc^-3 for LAEs at z~5.7, and compare it with previous measurements.
description: 26 pages, 19 figures. to appear in the ApJ Supplement COSMOS Special Issue
Bootstrapping a Two-Loop Four-Point Form Factor
Creators: name: Guo, Yuanhong
name: Wang, Lei
name: Yang, Gang
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We compute the two-loop four-point form factor of a length-3 half-BPS operator in planar N=4 SYM, which belongs to the class of two-loop five-point scattering observables with one off-shell color-singlet leg. A new bootstrapping strategy is developed to obtain this result by starting with an ansatz expanded in terms of master integrals and then solving the master coefficients via various physical constraints. We find that consistency conditions of infrared divergences and collinear limits, together with the cancellation of spurious poles, can fix a significant part of the ansatz. The remaining degrees of freedom can be fixed by one simple type of two-double unitarity cut. Full analytic results in terms of both symbol and Goncharov polylogarithms are provided.
description: 11 pages, 3 figures, 4 tables; v2: references added, published version
Λογοτεχνία και Νέες Τεχνολογίες: συγγραφή έργου ηλεκτρονικής λογοτεχνίας για παιδιά και διερεύνηση αναγνωστικής συμπεριφοράς μαθητών
Creators: name: Πανίδου, Σοφία Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Ηλεκτρονική Λογοτεχνία
Υπερκείμενο
Αναγνωστική συμπεριφορά
E- literature
Hypertext
Reading behavior

description: Σκοπός της διατριβής ήταν η δημιουργία ενός πρωτότυπου έργου ηλεκτρονικής λογοτεχνίας για παιδιά και η διερεύνηση της ανταπόκρισής τους ως αναγνώστες. Μελετήσαμε την ιστορία και την εξέλιξη της ηλεκτρονικής λογοτεχνίας στο εξωτερικό και στη χώρα μας. Επικεντρωθήκαμε στο είδος του υπερκειμένου και στα χαρακτηριστικά του. Ακόμη αναφερθήκαμε στα πορίσματα προηγούμενων ερευνών με θέμα την αναγνωστική συμπεριφορά σε ηλεκτρονικό περιβάλλον. Στη συνέχεια κατασκευάσαμε ένα υπερκειμενικό έργο για μικρούς αναγνώστες, το «Παλαβοχώρι». Αναφερθήκαμε στην πορεία συγγραφής, στους περιορισμούς και τις επιλογές μας. Στη συνέχεια διερευνήσαμε την αναγνωστική συμπεριφορά μαθητών της Γ, Δ, Ε και ΣΤ τάξης στο έργο αυτό και στην εξαγωγή συμπερασμάτων.
description: The aim of the present thesis was the creation of an e- literature project for children and the exploration of student’s reading behavior. We studied the history and evolution of e- literature in Greece and abroad. We focused on hypertext and its characteristics. Furthermore, we made references to previous studies of reading behavior in electronic environments. Then we created a hypertext for children, “Palavohori”. We presented the creating process, the restrictions and we justified the choices we made. We explored the reading behavior of our students of the last four grades of primary school and we discussed our findings in the light of the existing literature and future directions.
The metallicity of M dwarfs: photometric calibrations with Markov Chain Monte Carlo and Bayesian inference
Creators: name: Duque-Arribas, Christian
name: Montes, David
name: Tabernero, Hugo M.
name: Marfil, Emilio
name: Caballero, Jose Antonio
Publisher: name: Zenodo
Year: 2021
Subjects: Cool Stars on the main sequence

description: In our on-going effort to characterize M dwarfs, we have carried out multi-band photometry calibrations of metallicity for early and intermediate M dwarfs using Gaia EDR3, 2MASS and AllWISE. These catalogs, combined with a sample of 5435 M dwarfs with additional parameters determined by APOGEE high-resolution spectroscopy, allow us to study the effect of the chemical composition in color-color and color-magnitude diagrams. We train the calibrations using Bayesian statistics and Markov Chain Monte Carlo (MCMC) techniques and derive several photometric calibrations aplicable to M dwarfs with metallicities of -0.4 ≤ [Fe/H] ≤ +0.4, obtaining estimations reliable to 0.10 dex. Lastly, we compare our results with previous photometric studies of metallicity for an additional sample of FGK+M common-proper-motion systems, finding a great predictive performance.
description: {"references": ["Birky, J. et al. 2020, ApJ, 892, 31", "Bressan, A. et al. 2012, MNRAS, 427, 127", "Davenport, J. R. A. & Dorn-Wallenstein, T. Z. 2019, RNAAS, 3, 54", "Mann, A. et al. 2013, AJ, 145, 52", "Montes, D. et al. 2018, MNRAS, 479, 1332"]}
Supersolidity and phase diagram of softcore bosons in a triangular lattice
Creators: name: Gan, Jing-Yu
name: Wen, Yu-Chuan
name: Yue-Yu
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study the softcore extended Bose Hubbard model in a two-dimensional triangular lattice by using the quantum Monte Carlo methods. The ground state phase diagram of the system exhibits a very fruitful structure. Except the Mott insulating state, four kinds of solid states with respect to the commensurate filling factors $ρ=1/3,2/3$ and $ρ=1$ are identified. Two of them (CDW II and CDW III) are newly predicted. In incommensurate fillings, superfluid, spuersolid as well as phase separation states are detected . As in the case for the hardcore bosons, a supersolid phase exists in $1/3
description: 4 pages, 5 figures
Fermion propagator in a rotating environment
Creators: name: Ayala, Alejandro
name: Hernández, L. A.
name: Raya, K.
name: Zamora, R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We apply the exponential operator method to derive the propagator for a fermion immersed within a rigidly rotating environment with cylindrical geometry. Given that the rotation axis provides a preferred direction, Lorentz symmetry is lost and the general solution is not translationally invariant in the radial coordinate. However, under the approximation that the fermion is completely dragged by the vortical motion, valid for large angular velocities, translation invariance is recovered. The propagator can then be written in momentum space. The result is suited to be used applying ordinary Feynman rules for perturbative calculations in momentum space.
description: Expanded discussion, version to appear in Phys. Rev. D
Review of New Rare Hadronic B-decay Results
Creators: name: Smith, James G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present a new result from Belle and many new results from BABAR for rare hadronic B decays. These include measurements of decays involving baryons, a Dalitz plot analysis of the three-charged-kaon system, many new results for B decays to eta'X and omegaX, and a limit for the decay B-> a_1 rho. Measurements of the vector-vector decays B->rhoKstar and B->omegaKstar are helping to understand the value of the longitudinal polarization fraction for these B->VV decays.
description: 7 pages, 10 figures, submitted to "Flavor Physics & CP Violation Conference, Vancouver, 2006"
Study of red giant stars in Galactic open clusters
Creators: name: Ziliotto, Tuila
name: Alves-Brito, Alan
Publisher: name: Zenodo
Year: 2021
Subjects: Stellar systems, clusters, and associations

description: Galactic open clusters are still the only example of single stellar populations: gravitationally bound stars that presents different masses but the same age and chemical composition. Despite multiple stellar populations are found in globular clusters, its existence in open clusters is still widely discussed in the literature. In globular clusters, one of the most common abundance variations found is the anticorrelation between CN and CH, which is the best studied since the molecular bands are easy to be measured using low resolution spectra. However, the sample of open clusters analysed is still small when comparable to that of globular clusters. Therefore, the UFRGS Open Cluster Survey (UOCS) aims to map over 150 red giant stars in 25 Galactic open clusters to seach for CN and CH abundance variations. We present partial results regarding the survey characterization, data reduction, kinematic analysis, and determination of a sample of observed stars’ effective temperature and surface gravity.
description: {"references": ["Alonso, A. et al. 1999, A&A, 140, 261", "Alves-Brito, A. et al. 2008, AAP, 486, 3, 941\u2013950", "Bastian, N.; Lardo, C. 2018, ARAA, 56, 83\u2013136", "Ciardi, D. R. et al. 2011, 141, 4, 108", "Dias, B. et al. 2018, A&A, 614, 146", "Gratton, R. et al. 2004, ARAA, 42, 1, 385\u2013440"]}
Large-Nc estimate of the chiral low-energy constants
Creators: name: Portoles, J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Chiral low-energy constants incorporate short-distance information from the dynamics involving heavier degrees of freedom not present in the chiral Lagrangian. We have studied the contribution of the lightest resonances to the chiral low-energy constants, up to O(p^6), within a systematic procedure guided by the large-Nc limit of QCD and also including short-distance asymptotic constraints.
description: 8 pages, 1 figure. Talk given at the Final Euridice Meeting "Effective Theories of colours and flavours : from EURODAPHNE to EURIDICE", 24th-27th August 2006, Kazimierz (Poland)
Critical Currents in Conventional Josephson Junctions With Grain Boundaries
Creators: name: Sulangi, Miguel Antonio
name: Bettmann, Laetitia
name: Weingartner, T. A.
name: Pokhrel, N.
name: Patrick, E.
name: Law, M.
name: Kreisel, A.
name: Hirschfeld, P. J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: It has been hypothesized that the variation of the critical currents in Nb/Al-AlO$_x$/Nb junctions is due to, among other effects, the presence of grain boundaries in the system. Motivated by this, we examine the effect of grain boundaries on the critical current of a Josephson junction. We assume that the hopping amplitudes are dependent on the interatomic distance, and derive a physically realistic model of distance-dependent hopping amplitudes. We find that the presence of a grain boundary and associated disorder is responsible for a very large drop in the critical current relative to a clean system. We also find that when a tunnel barrier is present, grain boundaries cause substantial variations in the critical currents due to the disordered hoppings near the tunnel barrier. We discuss the applicability of these results to Josephson junctions presently intended for use in superconducting electronics applications.
description: 10 pages, 11 figures, published version, includes minor changes
A heuristic system for environmental risk assessment of mercury from gold mining operations
Creators: name: Veiga, Marcello M.
Publisher: name: University of British Columbia
Year: 2009

description: Mercury pollution in the Amazon region represents today one of the most serious environmental issues faced by mankind. Quantities from 70 to 170 tonnes of mercury are discharged into the Amazonian environment annually from gold mining operations conducted by so-called “garjmpeiros” or informal miners. The transformations of mercury in the environment are not well understood by non-technical people and neither are methods to alleviate dangerous situations. As the issue is fraught with complex and vague concepts, Expert Systems can play an important role in transferring heuristic knowledge to non-technical people interacting directly with miners. A synergy is obtained if these people are also made aware of the toxic effects of mercury, methods to minimize emissions and of methods to diagnose critical situations. This work shows how an Expert System, HgEx, was developed to assist non-expert people to obtain a preliminary Hg bioaccumulation risk assessment without conducting a complex monitoring program. Fuzzy Logic techniques and a new weighted inference method allow program users to input imprecise field observations and still obtain conclusions about pollution extent and bioaccumulation possibilities. Because of its simplicity and ability to combine complex technical issues together with heuristic operational observations, the technology of an Expert System can play an important role in providing a rapid risk assessment for non-technical people. An initial picture of the contamination potential of a region or mining site together with measures to minimize mercury emissions and remedy critical situations are the main results presented to users who might include health workers, environmental and mining inspectors, engineers, biologists, etc. This work also stresses the importance of organic-rich environments in Hg-complex formation and points out the importance of vegetation fires as an additional source of Hg not previously considered in the Amazon. The tutorial part of the system can give guidelines for mercury-monitoring field work as well as an overview on the mercury biogeochemical cycle.
Rotation periods for cool stars in the open cluster Ruprecht 147 (NGC 6774)
Creators: name: Gruner, David
name: Barnes, Sydney
Publisher: name: Zenodo
Year: 2021
Subjects: Cool Stars on the main sequence

description: We present rotation periods for cool stars in the oldest (2.7 Gyr) nearby (305 pc) open cluster Ruprecht 147, whose location allows lower-mass stars to be measured than in the similarly-aged Kepler cluster NGC 6819. A significant fraction of the cluster was observed for 82 days by the Kepler satellite during the 7th campaign (C7) of its K2 mission. We re-evaluated the membership of the cluster stars and carefully constructed light curves for 102 cluster members after performing principal component analysis across the entire C7 field. We identified reliable rotation periods for 21 of these member stars, 10 of them in the K-M region redder than the G-K region observed in NGC 6819. The distribution is notably flatter than most prior predictions from rotational stellar evolution models. We compare the distribution of periods in Ru 147 with those of other relevant clusters, such as the 2.5 Gyr-old NGC 6819 (to whose periods the Ru 147 distribution connects reasonably smoothly) and to those in M 67, which lie securely above. Consequently, we find that the Ru147 stars continue to populate a single surface in rotation period-mass-age space. We find that the recent Spada & Lanzafame (2020) model of stellar spindown comes closest to describing the Ru 147 data with an economical use of parameters. However, it requires the use of a third, mass-dependent timescale in comparison with the two timescales of prior models.
description: {"references": ["Barnes, S. A. 2010, ApJ, 722, 222", "Barnes, S. A., Weingrill, J., Fritzewski, D., Strassmeier, K. G., & Platais, I. 2016a, ApJ, 823, 16", "Curtis, J. L., Ag\u00fceros, M. A., Douglas, S. T., & Meibom, S. 2019, ApJ, 879, 49", "Fritzewski, D. J., Barnes, S. A., James, D. J., & Strassmeier, K. G. 2020, A&A,641, A51", "Gruner, D. & Barnes, S. A. 2020, A&A, 644, A16", "Luger, R., Agol, E., Kruse, E., et al. 2016, AJ, 152, 100", "Meibom, S., Barnes, S. A., Latham, D. W., et al. 2011, ApJ, 733, L9", "Meibom, S., Barnes, S. A., Platais, I., et al. 2015, Nature, 517, 589", "Radick, R. R., Thompson, D. T., Lockwood, G. W., Duncan, D. K., & Baggett, W. E. 1987, ApJ, 321, 459", "Spada, F. & Lanzafame, A. C. 2020, A&A, 636, A76"]}
Proper-time method for unequal masses
Creators: name: Osipov, A. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The result of removing of heavy non-equal mass particles from the theory can be described, at low energy, by the effective action, which is a series in inverse-square powers of the mass. We propose a new efficient tool to calculate the leading terms of this series based on the Schwinger proper-time method. Unequal masses give rise to a large number of effective vertices describing the explicit flavour symmetry breaking effects with well-defined coupling constants. Our method is pertinent to the theory with explicit and spontaneous chiral symmetry breaking, chiral gauge theory, standard and beyond standard model effective field theory, the theory of critical phenomena, cosmology, etc.
description: 5 pages, no figures, the version has been accepted for publication in Physics Letters B
Ο Ωριγένης και το πρόβλημα του κακού
Creators: name: Ορφανουδάκη, Μερόπη Χαράλαμπου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Ωριγένης
Κακό
Ελεύθερη βούληση
Origen
Evil
Free will

description: Αντικείμενο της παρούσας εργασίας είναι η σκέψη του χριστιανού φιλοσόφου Ωριγένη, ώστε να εξαχθούν συμπεράσματα σχετικά με το τι συνιστά κακό στην κοσμοθεολογία του, αλλά πάντα συνυφασμένο με τον άνθρωπο και την ελεύθερη βούληση, της οποίας άμεση συνάρτηση είναι το ηθικό κακό. Παρουσιάζεται το ταξίδι και η “πτώση”-ενσάρκωση της ανθρώπινης ψυχής και ακολούθως η επιστροφή πίσω στον Θεό. Αναδεικνύεται μέσα από τα σωζόμενα κείμενά του η θέση της ύλης και της ελεύθερης επιλογής στο οντολογικό και ηθικό σύστημα του ιδιαίτερα ασκητικού Ωριγένη∙ η προσωπική του διαμάχη με την αμαρτία. Εξετάζεται ακόμη ποια είναι η θέση του Θεού σε έναν κόσμο όπου το κακό και η δυστυχία έχουν τον πρώτο λόγο. Το πρόβλημα του κακού, επίσης, είναι άρρηκτα συνυφασμένο με την ελεύθερη βούληση. Αν δεν υπάρχει ελεύθερη βούληση δεν υπάρχει έπαινος και ψόγος, επομένως δεν υφίστανται ηθικά αγαθές ή αξιόμεμπτες πράξεις. Στον Ωριγένη η ελεύθερη βούληση έχει τη δική της ξεχωριστή σημασία για τη σχέση του ανθρώπου με τον Θεό, αλλά και με την προσωπική του αυτοβελτίωση και εν τέλει την ανάβαση στον επουράνιο κόσμο.
description: The present thesis aims to analyze and enquire about the concept of evil, in relation to man’s free will, as presented through Origen’s Christian thought, theology and cosmology. Based on a reading of the original sources, I trace Origen’s views on the “fall” of Man, as well as the journey back to God, while examining the true nature of matter, as well as that of free will in the ontological and ethical system of the early Christian theologian. Furthermore, I attempt to determine the exact position of God in a world full of despair and misery. The problem of evil goes hand in hand with free will, for if there was not free will there would neither be praise and punishment, or virtuous and malevolent actions. For Origen, free will has its own special place in the relationship of Man and God and is crucial to one’s personal self-improvement and the ascent to the heavenly world.
Lande g-tensor in semiconductor nanostructures
Creators: name: Alegre, T. P. Mayer
name: Hernández, F. G. G.
name: Pereira, A. L. C.
name: Medeiros-Ribeiro, G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Understanding the electronic structure of semiconductor nanostructures is not complete without a detailed description of their corresponding spin-related properties. Here we explore the response of the shell structure of InAs self-assembled quantum dots to magnetic fields oriented in several directions, allowing the mapping of the g-tensor modulus for the s and p shells. We found that the g-tensors for the s and p shells show a very different behavior. The s-state in being more localized allows the probing of the confining potential details by sweeping the magnetic field orientation from the growth direction towards the in-plane direction. As for the p-state, we found that the g-tensor modulus is closer to that of the surrounding GaAs, consistent with a larger delocalization. These results reveal further details of the confining potentials of self-assembled quantum dots that have not yet been probed, in addition to the assessment of the g-tensor, which is of fundamental importance for the implementation of spin related applications.
description: 4 pages, 4 figures
External pressure dependence of Granular Orifice Flow: transition to Beverloo flow
Creators: name: Peng, Zheng
name: Zhou, Jiangmeng
name: Zhou, Jiahao
name: Miao, Yuan
name: Cheng, Liyu
name: Jiang, Yimin
name: Hou, Meiying
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: In this paper, we have designed and employed a suspended-wall silo to remove Janssen effect in order to explore directly the local pressure dependence of Granular Orifice Flow (GOF) systematically. We find that as Janssen effect is removed, the flow rate Q changes linearly with the external pressure. The slope α of the linear change decays exponentially with the ratio of the silo size and the size of the orifice Φ/D, which suggests the existence of a characteristic ratio λ (~2.4). When Φ/D > λ, α gradually decays to zero, and the effect of external pressure on the GOF becomes negligible, where the Beverloo law retrieves. Our results show that Janssen effect is not a determining factor of the constant rate of GOF, although it may contribute to shield the top load. The key parameter in GOF is Φ/D. In small Φ/D, the flow rate of GOF can be directly adjusted by the external pressure via our suspended-wall setup, which may be useful to the transportation of granules in microgravity environment where the gravity-driven Beverloo law is disabled.
Phase coherent transport in a side-gated mesoscopic graphite wire
Creators: name: Graf, D.
name: Molitor, F.
name: Ihn, T.
name: Ensslin, K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigate the magnetotransport properties of a thin graphite wire resting on a silicon oxide substrate. The electric field effect is demonstrated with back and side gate electrodes. We study the conductance fluctuations as a function of gate voltage, magnetic field and temperature. The phase coherence length extracted from weak localization is larger than the wire width even at the lowest carrier densities making the system effectively one-dimensional. We find that the phase coherence length increases linearly with the conductivity suggesting that at 1.7 K dephasing originates mainly from electron-electron interactions.
description: 5 pages, 4 figures
IGRINS RV: A Precision RV Pipeline for IGRINS Using Modified Forward-Modeling in the Near-Infrared
Creators: name: Stahl, Asa G.
name: Tang, Shih-Yun
name: Johns-Krull, Christopher M.
name: Prato, L.
name: Llama, Joe
name: Mace, Gregory M.
name: Lee, Jae Joon
name: Oh, Heeyoung
name: Luna, Jessica
name: Jaffe, Daniel T.
Publisher: name: Zenodo
Year: 2021
Subjects: Young stars
Radial velocities
Planet Detection

description: Applications of the radial velocity (RV) technique to the near infrared (NIR) are valuable for their diminished susceptibility to the impact of stellar activity and their suitability for studying late-type stars. In this paper, we present the \texttt{IGRINS RV} open source \texttt{python} pipeline for computing infrared RV measurements from reduced spectra taken with IGRINS, a R$\equiv \lambda/\Delta \lambda \sim$45,000 spectrograph with simultaneous coverage of the H band (1.49--1.80 $\mu$m) and K band (1.96--2.46 $\mu$m). Using a modified forward modeling technique, we construct high resolution telluric templates from A0 standard observations on a nightly basis to provide a source of common-path wavelength calibration while mitigating the need to mask or correct for telluric absorption. A0 standard observations are also used to model the variations in instrumental resolution across the detector, including a yearlong period when the K band was defocused. Without any additional instrument hardware, such as a gas cell or laser frequency comb, we are able to achieve precisions of 26.8 \ms in the K band and 31.1 \ms in the H band for narrow-line hosts. These precisions are validated by a monitoring campaign of two RV standard stars as well as the successful retrieval of planet-induced RV signals for both HD\,189733 and $\tau$\,Boo\,A; furthermore, our results affirm the presence of the Rossiter-McLaughlin effect for HD\,189733. The \texttt{IGRINS RV} pipeline extends another important science capability to IGRINS, with publicly available software designed for widespread use.
Dipole Ordering of Water Molecules in Cordierite: Monte Carlo Simulations
Creators: name: Abalmasov, Veniamin A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Electric dipoles of water molecules, enclosed singly in regularly spaced nanopores of a cordierite crystal, become ordered at low temperature due to their mutual interaction and show the frequency dependence of their dielectric susceptibility, typical for relaxor ferroelectrics, according to recent experimental data. The corresponding phase transition is accompanied by anomalies in thermodynamic quantities, such as heat capacity and dielectric susceptibility, which are calculated here using the Monte Carlo method, and their agreement the experimental data is discussed. Despite the increase in the correlation length, the partially filled dipole lattice at low temperatures, according to the calculations, does not have long-range order and corresponds to a dipole glass. This simulation gives a microscopical insight into the formation of polar nanoregions in relaxor ferroelectrics and the temperature dependence of their size.
description: 6 pages, 5 figures; revised introduction and analytical considerations, references added, results unchanged
High-energy Emission from Pulsar Magnetospheres
Creators: name: Hirotani, Kouichi
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A synthesis of the present knowledge on gamma-ray emission from the magnetosphere of a rapidly rotating neutron star is presented, focusing on the electrodynamics of particle accelerators. The combined curvature, synchrotron, and inverse-Compton emission from ultra-relativistic positrons and electrons, which are created by two-photon and/or one-photon pair creation processes, or emitted from the neutron-star surface, provide us with essential information on the properties of the accelerator -- electric potential drop along the magnetic field lines. A new accelerator model, which is a mixture of traditional inner-gap and outer gap models, is also proposed, by solving the Poisson equation for the electrostatic potential together with the Boltzmann equations for particles and gamma-rays in the two-dimensional configuration and two-dimensional momentum spaces.
description: 16 pages, 9 figures, Mod. Phys. Lett. A in press (Brief Review)
Causative Organisms in Neonatal Sepsis in Neonatal Intensive Care Unit of HRH Princess Maha Chakri Sirindhorn Medical Center
Creators: name: Kannikar Vongbhavit, Olarn Prommalikit
Publisher: name: Faculty of Medicine,Srinakharinwirot University
Year: 2015
Subjects: neonatal sepsis, causative organisms, antimicrobial susceptibility

description: 1, 22, Journal of Medicine and Health Sciences
Critical View of Safety: A Safe Method to Prevent Bile Duct Injury from Laparoscopic Cholecystectomy
Creators: name: Thawatchai Tullavardhana
Publisher: name: Faculty of Medicine,Srinakharinwirot University
Year: 2015
Subjects: laparoscopic cholecystectomy, safe surgical technique, bile duct injury

description: 1, 22, Journal of Medicine and Health Sciences
Σχολιασμένη διερμηνεία στο πλαίσιο της πρακτικής άσκησης της κατεύθυνσης διερμηνείας του ΔΠΜΣ διερμηνείας και μετάφρασης, με έμφαση στον ρόλο του επικεφαλής διερμηνέων
Creators: name: Βλάμου, Αικατερίνη Ευστρατίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Επικεφαλής Διερμηνέων
Διερμηνεία Συνεδρίων
Chef de Cabine
Conference Interpreting
JPPS in Conference Interpreting and Translation

description: Σκοπός αυτής της εργασίας είναι η παρουσίαση των εμπειριών της γραφούσας, κατά τη διάρκεια της πρακτικής άσκησης διερμηνείας, το τελευταίο έτος φοίτισής της στο Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών Μετάφρασης και Διερμηνείας, στην κατεύθυνση Διερμηνείας. Στις ενότητες αυτής της εργασίας γίνεται αναφορά στα συνέδρια και τις εκδηλώσεις που συμμετείχε η συντάκτρια, στους ομιλητές που συμμετείχαν σε αυτά, στην προετοιμασία πριν από αυτά, ενώ γίνεται αξιολόγηση της απόδοσής της, περιγράφονται οι δυσκολίες που αντιμετώπισε, καθώς επίσης και ο τρόπος αντιμετώπισής τους. Ιδιαίτερη αναφορά γίνεται στο ρόλο του επκεφαλής διερμηνέων, ρόλο που ανέλαβε η γραφούσα, κατά τη διάρκεια της πρακτικής άσκησης. Στο τέλος της εργασίας, γίνεται παρουσίαση των συμπερασμάτων από την εμπειρία της γραφούσας μέσα από την πρακτική άσκηση. Επιπλέον, στην εργασία υπάρχει παράρτημα στο οποίο περιέχονται τα προγράμματα των συνεδρίων και τα έγγραφα αξιολόγησης της διερμηνείας
description: The aim of this thesis is to document the author’s experiences as an interpreter, during student internship, on the final year in the Joint Postgraduate Studies Programme in Conference Interpreting and Translation. This paper contains a detailed presentation of the conferences, of their speakers, of the preparation before, while there is an evaluation of the interpreting services. Apart from the evaluation, difficulties faced during interpreting are described in this paper, as well as the strategies used, for tackling these difficulties. There is special focus on the role of “chef de cabine”, a crucial role for an interpreter. The conclusions that have been drawn during the internship, are presented in the final chapter of the paper. Also, there is an appendix, containing the conferences’ programmes along with the evaluation forms
Intermittent mildly magnetized jets as the source of GRBs
Creators: name: Gottlieb, Ore
name: Bromberg, Omer
name: Levinson, Amir
name: Nakar, Ehud
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Gamma-ray bursts (GRBs) are powered by relativistic jets that exhibit intermittency over a broad range of timescales - from $ \sim $ ms to seconds. Previous numerical studies have shown that hydrodynamic (i.e., unmagnetized) jets that are expelled from a variable engine are subject to strong mixing of jet and cocoon material, which strongly inhibits the GRB emission. In this paper we conduct 3D RMHD simulations of mildly magnetized jets with power modulation over durations of 0.1 s and 1 s, and a steady magnetic field at injection. We find that when the jet magnetization at the launching site is $σ\sim 0.1$, the initial magnetization is amplified by shocks formed in the flow to the point where it strongly suppresses baryon loading. We estimate that a significant contamination can be avoided if the magnetic energy at injection constitutes at least a few percent of the jet energy. The variability timescales of the jet after it breaks out of the star are then governed by the injection cycles rather than by the mixing process, suggesting that in practice jet injection should fluctuate on timescales as short as $ \sim 10 $ ms in order to account for the observed light curves. Better stability is found for jets with shorter modulations. We conclude that for sufficiently hot jets, the Lorentz factor near the photosphere can be high enough to allow efficient photospheric emission. Our results imply that jets with $ 10^{-2} < σ< 1 $ injected by a variable engine with $ \sim 10 $ ms duty cycle are plausible sources of long GRBs.
Dimension and Torsion Theories for a Class of Baer *-Rings
Creators: name: Vas, Lia
Publisher: name: arXiv
Year: 2007
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 16W99, 16S90

description: Many known results on finite von Neumann algebras are generalized, by purely algebraic proofs, to a certain class ${\mathcal C}$ of finite Baer *-rings. The results in this paper can also be viewed as a study of the properties of Baer *-rings in the class ${\mathcal C}$. First, we show that a finitely generated module over a ring from the class ${\mathcal C}$ splits as a direct sum of a finitely generated projective module and a certain torsion module. Then, we define the dimension of any module over a ring from ${\mathcal C}$ and prove that this dimension has all the nice properties of the dimension studied in [W. Lück, Dimension theory of arbitrary modules over finite von Neumann algebras and $L^2$-Betti numbers I: Foundations, J. Reine Angew. Math. 495 (1998) 135--162] for finite von Neumann algebras. This dimension defines a torsion theory that we prove to be equal to the Goldie and Lambek torsion theories. Moreover, every finitely generated module splits in this torsion theory. If $R$ is a ring in ${\mathcal C},$ we can embed it in a canonical way into a regular ring $Q$ also in ${\mathcal C}.$ We show that $K_0(R)$ is isomorphic to $K_0(Q)$ by producing an explicit isomorphism and its inverse of monoids Proj$ (P)\to$ Proj$ (Q)$ that extends to the isomorphism of $K_0(R)$ and $K_0(Q)$.
Archiving: The Overlooked Spreadsheet Risk
Creators: name: Lemieux, Victoria
Publisher: name: arXiv
Year: 2008
Subjects: subject: Software Engineering (cs.SE)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences
subject: D.2.4; D.2.5; H.4.1; K.6.4; K.8.1

description: This paper maintains that archiving has been overlooked as a key spreadsheet internal control. The case of failed Jamaican commercial banks demonstrates how poor archiving can lead to weaknesses in spreadsheet control that contribute to operational risk. In addition, the Sarbanes-0xley Act contains a number of provisions that require tighter control over the archiving of spreadsheets. To mitigate operational risks and achieve compliance with the records-related provisions of Sarbanes-Oxley, the author argues that organisations should introduce records management programmes that provide control over the archiving of spreadsheets. At a minimum, spreadsheet archiving controls should identify and ensure compliance with retention requirements, support document production in the event of regulatory inquiries or litigation, and prevent unauthorised destruction of records.
description: 16 Pages. Recovered by OCR from paper conference proceedings
Fast estimation of aperture mass statistics II: Detectability of higher order statistics in current and future surveys
Creators: name: Porth, Lucas
name: Smith, Robert E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We explore an alternative method to the usual shear correlation function approach for the estimation of aperture mass statistics in weak lensing survey data. Our approach builds on the direct estimator method. In this paper, we extend our analysis to statistics of arbitrary order and to the multiscale aperture mass statistics. We show that there always exists a linear order algorithm to retrieve any of these generalised aperture mass statistics from shape catalogs when the direct estimator approach is adopted. We validate our approach through application to a large number of Gaussian mock lensing surveys where the true answer is known and we do this up to 10th order statistics. We then apply our estimators to an ensemble of real-world mock catalogs obtained from N-body simulations - the SLICS mocks, and show that one can expect to retrieve detections of higher order clustering up to fourth order in a KiDS-1000 like survey. We expect that these methods will be of most utility for future wide-field surveys like Euclid and the Rubin Telescope.
description: 13 pages + 11 pages appendix, 10 figures. Matches version published in MNRAS
Online Annex for "Toward Specifying Regulatory and Business Requirements for Monitoring Fund Activities"
Creators: name: Sannier, Nicolas
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 461205
subject: Requirements engineering

description: This repository contains the annex material for the paper titled: "Toward Specifying Regulatory and Business Requirements for Monitoring Fund Activities"In particular, it contains the final version of the conceptual model as well as additional material from the qualitative study that were performed for its creation
Estimation of electric field impact in deep brain stimulation from axon diameter distribution in the human brain
Creators: name: Johansson, Johannes D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Background: Finite element method (FEM) simulations of the electric field magnitude (EF) are commonly used to estimate the affected tissue surrounding the active contact of deep brain stimulation (DBS) leads. Previous studies have found that DBS starts to noticeably activate axons at approximately 0.2 V/mm, corresponding to activation of 3.4 $μ$m axons in simulations of individual axon triggering. Most axons in the brain are considerably smaller however, and the effect of the electric field is thus expected to be stronger with increasing EF as more and more axons become activated. Objective: To estimate the fraction of activated axons as a function of electric field magnitude. Methods: The EF thresholds required for axon stimulation of myelinated axon diameters between 1 and 5 $μ$m were obtained from a combined cable and Hodgkin-Huxley model in a FEM-simulated electric field from a Medtronic 3389 lead. These thresholds were compared with the average axon diameter distribution from literature from several structures in the human brain to obtain an estimate of the fraction of axons activated at EF levels between 0.1 and 1.8 V/mm. Results: The effect of DBS is estimated to be 41$\cdot$EF - 7.4 % starting at a threshold level EFt0 = 0.18 V/mm. Conclusion: The fraction of activated axons from DBS in a voxel is estimated to increase linearly with EF above the threshold level of 0.18 V/mm. This means linear regression between EF above 0.18 V/mm and clinical outcome is a suitable statistical method when doing improvement maps for DBS.
description: 11 pages, 6 figures
A new Neptune-mass planet orbiting HD 219828
Creators: name: Melo, C.
name: Santos, N. C.
name: Gieren, W.
name: Pietrzynski, G.
name: Ruiz, M. T.
name: Sousa, S. G.
name: Bouchy, F.
name: Lovis, C.
name: Mayor, M.
name: Pepe, F.
name: Queloz, D.
name: da Silva, R.
name: Udry, S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Two years ago a new benchmark for the planetary survey was set with the discoveries of three extrasolar planets with masses below 20$M_\oplus$. In particular, the serendipitous discovery of the 14$M_\oplus$ planet around $μ$ Ara found with HARPS with a semi-amplitude of only 4 m s$^{-1}$ put in evidence the tremendous potential of HARPS for the search of this class of very low-mass planets. Aiming to discovering new worlds similar to $μ$ Ara b, we carried out an intensive campaign with HARPS to observe a selected sample of northern stars covering a range of metallicity from about solar to twice solar. Two stars in our program were found to present radial velocity variations compatible with the presence of a planet-mass companion. The first of these, HD 219218, was found to be orbited by a planet with a minimum mass of 19.8 $M_\oplus$ and an orbital period of 3.83 days. It is the 11th Neptune-mass planet found so far orbiting a solar-type star. The radial velocity data clearly show the presence of an additional body to the system, likely of planetary mass. The second planet orbits HD 102195, has a mass of 0.45$M_{Jup}$ and an orbital period of 4.11 days. This planet has been already announced by Ge et al. (2006). Our data confirm and improve the orbital solution found by these authors. We also show that the high residuals of the orbital solution are caused by stellar activity, and use the bisectors of the HARPS cross-correlation function to correct the noise introduced by stellar activity. An improved orbital solution is obtained after this correction. This kind of analysis may be used in the future to correct the radial-velocities for stellar activity induced noise.
description: Accepted for publication in A&A. In a few occasions in the text, HD219828 was mistyped as HD219218. This has been now corrected