cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Kinetic description of classical matter infalling in black holes
Creators: name: Nicolini, Piero
name: Tessarotto, Massimo
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A popular aspect of black holes physics is the mathematical analogy between their laws, coming from general relativity and the laws of thermodynamics. The analogy is achieved by identifying a suitable set of observables, precisely: \emph{(a)} $E=M$ (being $E$ the thermodynamic free energy and $M$ the mass of the BH), \emph{(b)} $T=ακ$ (with $T$ the absolute temperature, $κ$ the so-called surface gravity on event horizon and $% α$ a suitable dimensional constant) and \emph{(c)} $S=(1/8πα)A $ (where $S$ is the thermodynamic entropy of the black hole and $A$ the surface of the event horizon). However, despite numerous investigations and efforts spent on the subject, the theoretical foundations of such identifications between physical quantities belonging to apparently unrelated frameworks are not yet clear. The goal of this work is to provide the contribution to the black hole entropy, coming from matter in the black hole exterior. We propose a classical solution for the kinetic description of matter falling into a black hole, which permits to evaluate both the kinetic entropy and the entropy production rate of classical infalling matter at the event horizon. The formulation is based on a relativistic kinetic description for classical particles in the presence of an event horizon. An H-theorem is established which holds for arbitrary models of black holes and is valid also in the presence of contracting event horizons.
The role of British Columbia elementary school counsellors in assisting depressed students
Creators: name: Farquhar, Jacqueline Lee
Publisher: name: University of British Columbia
Year: 2009

description: This study examined British Columbia elementary school counsellors' perceptions in relation to assisting depressed students, including: (a) their knowledge about depression; (b) their ideal role; (c) their current role; (d) their current practices; (e) barriers to assisting depressed students; and (f) factors which would help them to better assist these students. A questionnaire specifically designed for this study was mailed to 333 elementary school counsellors, and 248 (74.5%) were completed and returned. The percentages of counsellors who perceived various functions as part of their current and ideal roles were calculated, as were the percentages who engaged in various counsellor activities, and indicated factors which would help them to better assist depressed students. Sample means and standard deviations were calculated for the extent to which various factors were barriers to assisting depressed students. Results indicated most counsellors perceived identification, referral, and prevention of student depression to be part of their ideal and current roles, and have used these functions to assist depressed students. However, respondents were divided on treating depressed students, and only slightly more than one-third had assessed students even though two-thirds perceived it as part of their ideal role. Most counsellors have been referred depressed students by teachers, and have referred students to mental health and medical professionals. Approximately one-half perceived art and play therapy to be a more effective method of treating depression. Counsellors lacked basic information on childhood depression, and more learned about it through their own initiative, rather than professional development activities. Too high a student-to-counsellor ratio and lack of time were most consistently rated as the highest barriers to assisting depressed students. Other major barriers included: priority being given to acting out students; lack of knowledge about depression, assessment techniques, and treatment strategies; and lack of community resources. Lack of a clear role policy was not perceived to be a major barrier to assisting depressed students. The most frequent recommendations for helping counsellors to assist depressed students were more information about effective treatment strategies and a lower student-to-counsellor ratio.
Optimal 1-NN Prototypes for Pathological Geometries
Creators: name: Sucholutsky, Ilia
name: Schonlau, Matthias
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Using prototype methods to reduce the size of training datasets can drastically reduce the computational cost of classification with instance-based learning algorithms like the k-Nearest Neighbour classifier. The number and distribution of prototypes required for the classifier to match its original performance is intimately related to the geometry of the training data. As a result, it is often difficult to find the optimal prototypes for a given dataset, and heuristic algorithms are used instead. However, we consider a particularly challenging setting where commonly used heuristic algorithms fail to find suitable prototypes and show that the optimal prototypes can instead be found analytically. We also propose an algorithm for finding nearly-optimal prototypes in this setting, and use it to empirically validate the theoretical results.
description: 8 pages
First local helioseismic experiments with CO5BOLD
Creators: name: Steiner, O.
name: Vigeesh, G.
name: Krieger, L.
name: Wedemeyer-Böhm, S.
name: Schaffenberger, W.
name: Freytag, B.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: With numerical experiments we explore the feasibility of using high frequency waves for probing the magnetic fields in the photosphere and the chromosphere of the Sun. We track a plane-parallel, monochromatic wave that propagates through a non-stationary, realistic atmosphere, from the convection-zone through the photosphere into the magnetically dominated chromosphere, where it gets refracted and reflected. We compare the wave travel time between two fixed geometrical height levels in the atmosphere (representing the formation height of two spectral lines) with the topography of the surface of equal magnetic and thermal energy density (the magnetic canopy or beta=1 contour) and find good correspondence between the two. We conclude that high frequency waves indeed bear information on the topography of the `magnetic canopy'.
description: 6 pages, 4 figures, to appear in Astron. Nachrichten, proceedings of the First HELAS Local Helioseismology Workshop "Roadmap for European Local Helioseismology", Nice, 2006
Universitas Sumatera Utara
Creators: name: Wan Nur Aini Lubis
Publisher: name: Zenodo
Year: 2024
Subjects: subject: 4G

description: Untuk melestarikan kekayaan budaya bangsa, penting untuk mempertahankan dan mengumpulkan kosakata lokal. Bahasa lokal mencerminkan kearifan lokal yang telah diwariskan dari generasi ke generasi. Dengan mempertahankan kosakata daerah, kita tidak hanya mempertahankan keragaman linguistik tetapi juga mempertahankan nilai-nilai, tradisi, dan perspektif hidup yang terkandung dalam bahasa. Selain itu, karena dominasi bahasa asing dan kurangnya penutur, bahasa daerah terancam punah di era globalisasi saat ini. Oleh karena itu, untuk memastikan bahwa budaya lokal tetap hidup dan berdaya, penting untuk mengumpulkan kosakata daerah dan mewariskankannya kepada generasi berikutnya. Oleh karena itu, sebagai upaya untuk memperkenalkan kekayaan bahasa daerah di Indonesia, khususnya di wilayah Padang lawas, Sumatera Utara, penulis ingin membuat Kamus Sederhana bahasa Melayu Mandailing. Diharapkan dengan adanya kamus ini akan memperkaya bahasa daerah tersebut.
La « RADICALISATION » : enquête sur une notion à la croisée des politiques publiques et des sciences sociales
Creators: name: McLaughlin, Gilbert
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2021
Subjects: radicalisation
extrémisme violent

description: Le phénomène de la radicalisation est devenu, au cours des deux dernières décennies, une préoccupation croissante pour une majorité des gouvernements dans les démocraties occidentales. Il est devenu en quelques années un cadre conceptuel des sciences sociales visant à mieux comprendre et à expliquer le phénomène de l’engagement dans l’extrémisme violent. Partant du début des années 2000 jusqu’en 2018, nous proposons « une enquête conceptuelle » dans le contexte contemporain des sociétés des démocraties libérales occidentales. Dans un premier temps, nous proposerons une analyse de l’émergence du terme radicalisation comme objet de connaissance. Ensuite, nous étudierons l’étude de la constitution d’un nouveau domaine d’expertise autour de ce terme. Afin d’y arriver, nous aurons recours à une analyse des principaux discours des experts qui ont défini ce domaine d'étude.
Gillo “1910-1951”: un territorio in parte inesplorato
Creators: name: Civello, Gabriele
Publisher: name: Materiali di Estetica. Terza serie
Year: 2019

description: The author illustrates the first years of Gillo Dorfles’ life, starting from his childhood in Genoa during the First World War, the years of high schools in Trieste, his studies at the Faculty of Medicine in Milan and Rome. Subsequently, the author analyses Dorfles’ writings on Aesthetics, the poems and the pictorial works produced by Dorfles from the 1930s till 1948 (the year of the creation of the Movement for Concrete Art) and until 1951 (the year of the foundation of the magazine “Aut aut”).
description: Materiali di Estetica. Terza serie, N. 6.1 (2019): Gillo Dorfles. L'estetica al plurale
Gapless Fermi Surfaces in Superconducting CeCoIn5?
Creators: name: Barzykin, Victor
name: Gor'kov, L. P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: According to [M.A. Tanatar et al., Phys. Rev. Lett. 95, 067002 (2005)], in a multi-band d-wave superconductor CeCoIn5 electrons remain partially uncondensed. Interactions must induce superconducting order on all Fermi surfaces. We calculate specific heat and thermal conductivity in a two band model in presence of defects. Superconductivity originates on one Fermi surface, inducing a smaller gap on the other. Impurities diminish the induced gap and increase the density of states, restoring rapidly the Wiedemann-Franz law for this Fermi surface. Our calculations are in agreement with experiment.
description: 4 pages, 2 figures
Prediction of two-dimensional ferromagnetic ferroelectric VOF$_2$ monolayer
Creators: name: You, Hai-Peng
name: Ding, Ning
name: Chen, Jun
name: Dong, Shuai
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Nowadays, designing and searching for materials with multiple functional characteristics are the key to achieving high-performance electronic devices. Among many candidates, two-dimensional multiferroic materials have great potential to be applied in highly-integrated magnetoelectric devices, such as high-density non-volatile memories. Here, we predict a two-dimensional material VOF2 monolayer to possess intrinsic ferroelectric and ferromagnetic properties. The VOF$_2$ monolayer own the largest in-plane ferroelectric polarization ($332$ pC/m) in the family of VO$X_2$ ($X$: halogen) oxyhalides. Different from other VO$X_2$ monolayers whose magnetic ground states are antiferromagnetic or noncollinear spiral textures, the VOF$_2$ monolayer owns a robust ferromagnetic ground state, which is rare but highly desirable. Our theoretical prediction provides a good candidate and starting point for the further pursuit of more two-dimensional multiferroic materials with high-performance magnetoelectricity.
description: 5 figures
Στάσεις και απόψεις των εκπαιδευτικών ως προς την ενσωμάτωση μαθητών με νοητική ανεπάρκεια σε σχολικές μονάδες γενικής εκπαίδευσης:
Creators: name: Τσακνάκη, Φανή Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Eνσωμάτωση
Nοητική ανεπάρκεια
Σχολεία γενικής εκπαίδευσης
Στάσεις και απόψεις εκπαιδευτικών
Inclusion
Mental retardation
General education schools
Educators’ attitudes

description: Σε πολλές χώρες, υπήρξε μεγάλη εξέλιξη τα τελευταία χρόνια προς την κατεύθυνση της ενσωμάτωσης των μαθητών με ειδικές εκπαιδευτικές ανάγκες στη γενική εκπαίδευση. Κατά την τελευταία δεκαετία, αυτό έχει ως αποτέλεσμα ένα αυξημένο ενδιαφέρον για τη στάση που έχουν προς αυτή την εκπαιδευτική αλλαγή οι άμεσα εμπλεκόμενοι. Η παρούσα μελέτη διερεύνησε τις στάσεις ν 108 Ελλήνων εκπαιδευτικών για την ενσωμάτωση των παιδιών με νοητική ανεπάρκεια σε σχολεία γενικής εκπαίδευσης. Τους ζητήθηκε να συμπληρώσουν το Ερωτηματολόγιο για την ενσωμάτωση My Thinking About Inclusion Questionnaire των Stoiber, Goettinger, & Goetz (1998). Διαπιστώθηκε ότι οι εκπαιδευτικοί που συμμετείχαν στην έρευνα διατηρούσαν γενικά θετική στάση προς την ενσωμάτωση των παιδιών με νοητική ανεπάρκεια. Το φύλο και η ηλικία δεν βρέθηκε να επηρεάζει ιδιαίτερα σημαντικά τη στάση των δασκάλων ως προς την ενσωμάτωση μαθητών με νοητική ανεπάρκεια στην γενική τάξη. Οι συμμετέχοντες υπογραμμίζουν την ανάγκη να λάβουν κατάλληλη εκπαίδευση και βοήθεια, ώστε να μεγιστοποιηθούν τα οφέλη της ενσωμάτωσης για τα παιδιά. Οι δυσκολίες, όσον αφορά την εκπαίδευση χωρίς αποκλεισμούς, προκάλεσε το ενδιαφέρον της ερευνήτριας να ασχοληθεί με το θέμα αυτό. Αρκετοί συγγραφείς επισημαίνουν το σημαντικό ρόλο που διαδραματίζουν οι εκπαιδευτικοί στην υλοποίηση της συμμετοχικής εκπαίδευσης. Με τον προσδιορισμό προβλημάτων που αντιμετωπίζουν οι εκπαιδευτικοί στην ενσωμάτωση, θα μπορούμε να βελτιώσουμε το υπόβαθρο για μια επιτυχή ενσωμάτωση
description: In many countries, there has been a development towards the inclusion of students with special educational needs in regular education. Over the past decade, this has resulted in an increased interest in attitudes towards this educational change of those directly involved. This study investigated the attitudes of 108 Greek teachers towards the inclusion of children with mental retardation in mainstream schools. They were asked to complete My Thinking About Inclusion Questionnaire (Stoiber, Goettinger, & Goetz, 1998). It was found that teachers held overall positive attitudes towards the inclusion of children with mental retardation. Gender and age were found to slightly affect teachers’ attitudes. The participants emphasize the need to receive proper training and help in order to maximize the benefits of inclusion for children. The difficulties in making inclusive education happen, triggered researcher to think about the reasons for this. Several authors point at the key role that teachers play in realizing inclusive education. By finding the problems the teachers have in inclusion, we could improve the background for a successful inclusion.
RG decimation study of SU(2) gauge theory
Creators: name: Tomboulis, E. T.
name: Velytsky, Alexander
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We report on numerical studies of RG decimations in SU(2) gauge theory. We study in particular a class of plaquette actions involving sums of group representations. We measure a number of observables representative of different length scales in order to investigate the transformation of the system under different choices of spin blocking, and examine the flow of the effective action couplings. A need for a projection to some class of effective actions on the configurations resulting from the adopted numerical decimation procedures is demonstrated. A numerical decimation procedure resulting in the effective single plaquette Lagrangian tailored to reproduce different medium/large scale physics is devised.
description: 7 pages, Lattice 2006 (Confinement and Topology), several typos corrected
Novalis e Pascal. L’influsso degli “antichi maestri” nelle opere  di Thomas Bernhard
Creators: name: Apostolo, Stefano
Publisher: name: ACME
Year: 2015

description: L’elaborato si pone come obiettivo l’analisi degli influssi che due pensatori del calibro di Novalis e Pascal esercitarono sulla poetica e sulla produzione di Thomas Bernhard (1931-1989). Partendo da citazioni ricorrenti nei testi dell’autore, si passerà ad una loro contestualizzazione e ad un esame del ruolo che le due figure ricoprirono nella cosmogonia bernhardiana. Personalità di per sé molto diverse, poeta romantico il primo e teologo il secondo, vissute in epoche e contesti differenti, costituiscono tuttavia punti di riferimento fondamentali e ineludibili per la comprensione dei testi dell’autore austriaco. Novalis, teoreta di quella filosofia della malattia che così profondamente pervade le opere di Bernhard, influenzò fortemente la sua oscura poetica della morte e della Hoffnungslosigkeit, e proprio il frammento, l’unità minima e paradigmatica della produzione novalisiana, venne erto da Bernhard a modello compositivo, sia nella prosa che nel teatro. Altro campione di questo espediente stilistico, di questo testo breve ma ricchissimo di significato, fu Blaise Pascal, che nei Pensées, formidabile apologia del Cristianesimo nonché introspezione del rapporto tra l’uomo e il Divino, mise a nudo i punti cardini della miseria e della finitezza umana, sui quali Bernhard fece leva in maniera personalissima, per consolidare la propria visione del mondo e per dare vita alla teologia negativa che pervade le sue opere.
description: ACME, Vol 68, No 1 (2015)
Κινητικές και Αντιληπτικές δεξιότητες παιδιών με Σύνδρομο Down:
Creators: name: Τσιρλίδη, Ειρήνη Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Σύνδρομο Down
Αντιληπτικοκινητικές Δεξιότητες
Κινητικές Δεξιότητες
Down Syndrome
Perceptual Skills
Motor Skills

description: Τα άτομα με σύνδρομο Down, εκτός από τις διαφορές που αφορούν στα εξωτερικά τους χαρακτηριστικά σε σχέση με τα υπόλοιπα άτομα που αναπτύσσονται φυσιολογικά, παρουσιάζουν ιδιαιτερότητες και στη γνωστική και γλωσσική τους ανάπτυξη, καθώς και στις κινητικές, αντιληπτικοκινητικές και κοινωνικές τους δεξιότητες. Στην παρούσα εργασία με τη χρήση κατάλληλων μεθοδολογικών εργαλείων – checklist-, επiχειρήσαμε να διερευνήσουμε τα παραπάνω χαρακτηριστικά σε 30 παιδιά με σύνδρομο Down ηλικίας 8-12 χρονών. Τα παιδιά αυτά επιλέχθησαν συνολικά από 3 σχολεία (Θεσσαλονίκης, Εύοσμου και Ευκαρπίας) και τον Σύλλογο Down Βορείου Ελλάδος με βάση την ηλικία τους. Η μελέτη, είχε σκοπό να εφαρμόσει την επιστημονική μεθοδολογία και τα εργαλία που θα απαντήσουν σε 3 βασικά ερωτήματα.α)ποια είναι τα σημεία και οι δεξιότητες που εμφανίζουν δυσκολία,β) σε ποιους τομείς-άξονες ανήκουν αυτές οι δεξιότητες, γ) τον τρόπο με τον οποίο άξόνες και δεξιότητες είναι αλληλένδετες.
description: The individuals suffering from the Down syndrome show a range of particularities and complexities in terms of their cognitive and language development. Apart from their differences pertaining to their external characteristics when compared with the development of typical individuals, they also exhibit a difference in their kinetic, perceptive as well as social skills and competencies. In this essay, we examined the above characteristics in 30 children with Down syndrome aged 8-12 years old through the utilization of the proper methodological tools; checklists. The particular children were selected from 3 schools with in the extended area of Thessaloniki (Thessaloniki city centre, Evosmos, and Efkarpia) and from Northern Greece Down syndrome institution in based primarily on their age. The study aimed to apply scientific methodology and research tools so as to answer three key questions: a) what the areas and skills in which children with Down syndrome perform a difficulty are, b) which domain these skills belong to and, c) how these areas and skills are interrelated.
Inediti dalle «due tensioni» di Elio Vittorini. Nota al testo in dialogo con Dante Isella
Creators: name: Brigatti, Virna
Publisher: name: ACME
Year: 2015

description: Sono qui pubblicate alcune carte inedite contenute nei fondi archivistici del Centro APICE dell’Università degli Studi di Milano: si tratta in particolare di autografi appartenenti al Fondo Elio Vittorini (sottofascicolo 1, in Serie 5, UA 16) e non trascritti da Dante Isella per l’edizione delle carte appartenenti a tale faldone nel volume Le due tensioni. Appunti per una ideologia della letteratura, del 1967.
Il breve contributo propone inoltre una riflessione intorno alle scelte ecdotiche operate da Isella con l’obiettivo di ripensare le modalità di rappresentazione di carte manoscritte inedite in relazione alle nuove possibilità offerte dalla pubblicazione di contenuti su piattaforme online Open Access.
description: ACME, Vol 68, No 1 (2015)
The organisation, administration and implementation of an educational chamber music concerts series in an elementary school : a case study
Creators: name: Tempest, James Edward
Publisher: name: University of British Columbia
Year: 2009

description: Educational concerts for public school children have occurred for over a century in North America. During that time, they have evolved from orchestral concerts presented in symphony halls to chamber music concerts presented in school gymnasiums to highly interactive musician-in-residence programs. Each phase of their development has reflected popular education theories of the time and current economic influences on arts education. In addition, a central argument over whether music appreciation should be taught as experience or analysis has been at the heart of the many approaches developed to teaching music appreciation. The researcher was interested in how historical developments in music education theory and practice might have influenced musicians and teachers; the discovery of cultural and social issues that may have influenced decisions made by educators; administrative factors, past and present, that may have affected how educational concerts are conducted; the description of current educational chamber music concerts practices; the determination of the degree of integration these concerts have into the curriculum; discussions with musicians, teachers, and administrators regarding their reasons for making choices about how they conduct educational concerts; and finally, determining which of these factors, or combination, accounts for the success or failure of an ensemble's presentation. In attempting to study such things, a case study was carried out in one elementary school. The results of this study confirm findings of previous researchers. Data collected indicate that practices found in the contemporary classroom in support of educational concerts have not changed significantly. Although various projects have been instituted to test new approaches and theories using educational music concerts as the vehicle, none have survived for any length of time. Once research funds have been exhausted, these programs ceased and such developments appear to have had little effect on educational concert organisation and administration. At the heart of the situation is the contrast in attitudes towards music and music education held by educators and musicians. Educators' attitudes are similar to those of the general public in that they are primarily derived from popular music and culture. Attitudes of musicians reflect a a belief in the educational value of an in depth study of music. The conflict in attitudes leads to inefficiency in the use of school based concerts.
Postille
Creators: name: Esposito, A Cura Di Edoardo
Publisher: name: ACME
Year: 2015

description: Le postille di questo numero trattano dei seguenti volumi (fra parentesi il nome del recensore):

- José Domínguez Caparrós, Métrica española (Maria Rosso)

- Giovan Battista Casti, Poema Tartaro, edizione critica e commento di Alessandro Metlica (Arnaldo Di Benedetto)

- Carla Riccardi, Montale dietro le quinte (Alberto Cadioli)

- Luigi Russo – Walter Binni, Carteggio 1934 – 1961 (Carlo Di Alesio)

- François Jullien, Contro la comparazione. Lo “scarto” e il “tra”: un altro accesso all’alterità (Tiziano Moresi)
description: ACME, Vol 68, No 1 (2015)
Indecomposable involutive solutions of the Yang-Baxter equation of multipermutational level 2 with abelian permutation group
Creators: name: Jedlička, Přemysl
name: Pilitowska, Agata
name: Zamojska-Dzienio, Anna
Publisher: name: arXiv
Year: 2020
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 16T25, 20B35

description: We present a construction of all finite indecomposable involutive solutions of the Yang-Baxter equation of multipermutational level at most 2 with abelian permutation group. As a consequence, we obtain a formula for the number of such solutions with a fixed number of elements. We also describe some properties of the automorphism groups in this case - in particular, we show they are regular abelian groups.
description: 14 pages
Experiments on the magnetorotational instability in helical magnetic fields
Creators: name: Stefani, Frank
name: Gundrum, Thomas
name: Gerbeth, Gunter
name: Rüdiger, Günther
name: Szklarski, Jacek
name: Hollerbach, Rainer
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The magnetorotational instability (MRI) plays a key role in the formation of stars and black holes, by enabling outward angular momentum transport in accretion disks. The use of combined axial and azimuthal magnetic fields allows the investigation of this effect in liquid metal flows at moderate Reynolds and Hartmann numbers. A variety of experimental results is presented showing evidence for the occurrence of the MRI in a Taylor-Couette flow using the liquid metal alloy GaInSn.
description: 15 pages, 13 figures, submitted to New Journal of Physics
Magnification-Temperature Correlation: the Dark Side of ISW Measurements
Creators: name: LoVerde, Marilena
name: Hui, Lam
name: Gaztanaga, Enrique
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Integrated Sachs-Wolfe (ISW) measurements, which involve cross-correlating the CMB with the foreground large-scale structure (e.g. galaxies/quasars), have proven to be an interesting probe of dark energy. We show that magnification bias, which is the inevitable modulation of the foreground number counts by gravitational lensing, alters both the shape and amplitude of the observed ISW signal. This is true especially at high redshifts because (1) the intrinsic galaxy-temperature signal diminishes greatly back in the matter dominated era, (2) the lensing efficiency increases with redshift and (3) the number count slope generally steepens with redshift in a magnitude limited sample. At z >~ 2, the magnification-temperature correlation dominates over the intrinsic galaxy-temperature correlation and causes the observed ISW signal to increase with z, despite dark energy subdominance -- a result of the fact that magnification probes structures between the observer and the sources. Ignoring magnification bias can then lead to erroneous conclusions about dark energy. While the lensing modulation opens up an interesting high z window for ISW measurements, high z measurements are not expected to add much new information to low z ones if dark energy is the cosmological constant. This is because lensing introduces significant covariance across redshifts. The most compelling reason to pursue high z ISW measurements is to look for a potential surprise such as early dark energy domination or the signature of modified gravity. We conclude with a discussion of existing measurements, the highest z of which is at the margin of being sensitive to magnification bias. We also develop a formalism which might be of general interest: to predict biases in estimating parameters when certain physical effects are ignored in interpreting data.
description: 14 pages, 12 figures, references added, minor typos corrected, accepted for publication by PRD
A Niching Indicator-Based Multi-modal Many-objective Optimizer
Creators: name: Tanabe, Ryoji
name: Ishibuchi, Hisao
Publisher: name: arXiv
Year: 2020
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: Multi-modal multi-objective optimization is to locate (almost) equivalent Pareto optimal solutions as many as possible. Some evolutionary algorithms for multi-modal multi-objective optimization have been proposed in the literature. However, there is no efficient method for multi-modal many-objective optimization, where the number of objectives is more than three. To address this issue, this paper proposes a niching indicator-based multi-modal multi- and many-objective optimization algorithm. In the proposed method, the fitness calculation is performed among a child and its closest individuals in the solution space to maintain the diversity. The performance of the proposed method is evaluated on multi-modal multi-objective test problems with up to 15 objectives. Results show that the proposed method can handle a large number of objectives and find a good approximation of multiple equivalent Pareto optimal solutions. The results also show that the proposed method performs significantly better than eight multi-objective evolutionary algorithms.
description: This is an accepted version of a paper published in Swarm and Evolutionary Computation
Η μεταβίβαση περιουσιακών στοιχείων ως μέτρο εξυγίανσης πιστωτικού ιδρύματος (διάσπαση σε καλή και κακή τράπεζα):
Creators: name: Τσιμπούρα, Ευαγγελία Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: εξυγίανση
μεταβίβαση
τράπεζα
restructuring
transfer
bank

description: Σκοπός της παρούσας εργασίας είναι να παρουσιαστεί η μεταβίβαση περιουσιακών στοιχείων πιστωτικού ιδρύματος σε άλλο πιστωτικό ίδρυμα ή σε άλλο πρόσωπο, καθώς και η μεταβίβαση των περιουσιακών στοιχείων πιστωτικού ιδρύματος σε μεταβατικό πιστωτικό ίδρυμα που συστήνεται για αυτόν τον σκοπό, ως μέτρα εξυγίανσης πιστωτικού ιδρύματος, που θεσπίστηκαν με τον Ν. 4021/2011 και ενσωματώθηκαν στον Ν.3601/2007 στα άρθρα 63 Δ και 63 Ε. Στο πρώτο κεφάλαιο, αναλύεται ο σκοπός λήψεως των προαναφερόμενων μέτρων εξυγίανσης, εντάσσονται αυτά στο δίκαιο της τραπεζικής αφερεγγυότητας, περιγράφεται το υποκειμενικό και αντικειμενικό πλαίσιο εφαρμογής τους και η μεταξύ των μέτρων αυτών σχέση. Ακολούθως, στο δεύτερο κεφάλαιο γίνεται ειδικότερη ανάλυση της διαδικασίας που ακολουθείται στο πλαίσιο εκάστου μέτρου εξυγίανσης. Στο τρίτο κεφάλαιο, παρουσιάζονται οι συνέπειες αυτών των μέτρων. Στο τέταρτο κεφάλαιο αναλύονται οι ρυθμίσεις που είναι κοινές και στις δύο διαδικασίες εξυγίανσης και στο πέμπτο κεφάλαιο αναφέρονται οι περιπτώσεις πρακτικής εφαρμογής των εν λόγω μέτρων μέχρι σήμερα για την εξυγίανση των εγχώριων τραπεζών. Τέλος, γίνεται μία εν γένει αναφορά στην επίδραση της χρηματοπιστωτικής κρίσης στο εγχώριο τραπεζικό σύστημα και σκιαγραφείται η μεταβολή σε ευρωπαϊκό επίπεδο των αρχών αναφορικά με την εποπτεία του χρηματοπιστωτικού συστήματος.
description: The aim of the present thesis is to present plans/measures established by Law 4021/2011 and incorporated in Law 3601/2007 in articles 63 D and 63 E. for the restructuring of credit institutions including the transfer of (bank) assets belonging to a credit institution to another institution or other person and the transfer of assets of a credit institution to a credit transitional institution established for this purpose. The first chapter provides an analysis of the purpose of making the aforementioned reorganization measures, these are included in the law of bank insolvency, is described the subjective and objective framework for their implementation and the relation between these measures. Then, in the second chapter, becomes more specific analysis of the process followed within each reorganization measure. In the third chapter, are presented the effects of these measures. The fourth chapter analyzes the settings that are common to both proceedings of consolidation and in the fifth chapter are presented the cases of practical application of such measures to date for consolidation of domestic banks. Finally, becomes a general reference to the impact of financial crisis on the domestic banking system and are outlined the changes at European level principles on the supervision of the financial system.
Μελέτη της κατανομής των Πολυκυκλικών Αρωματικών Υδρογονανθράκων (ΠΑΥ) στα εισπνεύσιμα και αναπνεύσιμα αιωρούμενα σωματίδια αστικών περιοχών.:
Creators: name: Καραγκιοζίδου, Ολγα Γρηγορίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Πολυκυκλικοί Αρωματικοί Υδρογονάνθρακες
Εκχύλιση με μικροκύματα
Διαγνωστικοί λόγοι
Polycyclic Aromatic Hydrocarbons
Microwave Extraction
Diagnostic ratios

description: Οι Πολυκυκλικοί Αρωματικοί Υδρογονάνθρακες (ΠΑΥ) είναι ημιπτητικές οργανικές ενώσεις που σχηματίζονται κατά την ατελή καύση και την πυρόλυση της οργανικής ύλης. Η ανησυχία για την ύπαρξη αυτών των ενώσεων στο περιβάλλον είναι απόλυτα δικαιολογημένη δεδομένου ότι είναι παντού στον ατμοσφαιρικό αέρα και μερικοί από αυτούς είναι ανάμεσα στα ισχυρότερα γνωστά καρκινογόνα. Σκοπός της παρούσας διπλωματικής εργασίας είναι η μελέτη της κατανομής των Πολυκυκλικών Αρωματικών Υδρογονανθράκων (ΠΑΥ) στα εισπνεύσιμα και αναπνεύσιμα αιωρούμενα σωματίδια αστικών περιοχών. Για το σκοπό αυτό μελετήθηκε η παρουσία των ΠΑΥ σε δείγματα σωματιδιακής φάσης δυο κλασμάτων των αιωρούμενων σωματιδίων της ατμόσφαιρας (PM2.5 και PM10) σε δυο περιοχές στην πόλη της Θεσσαλονίκης, σε δύο χρονικές περιόδους, καλοκαίρι 2011 και χειμώνα 2012. Για την εκτίμηση των πιθανών πηγών εκπομπής των ΠΑΥ στις δυο περιοχές δειγματοληψίας, έγινε ανάλυση των προφίλ τους και χρήση διαγνωστικών λόγων.
description: Polycyclic Aromatic Hydrocarbons (PAHs) are SVOCs formed during incomplete combustion and pyrolysis of organic matter. Concern about the existence of these compounds in the environment is fully justified as they are ubiquitous in the air and some of them are among the strongest known carcinogens. The aim of this thesis is to study the distribution of Polycyclic Aromatic Hydrocarbons (PAH) in inspirable and respirable particles of urban areas. For this purpose we studied the presence of PAHs in samples of two fractions of particulate matter (PM2.5 and PM10) at two locations in the city of Thessaloniki, in two periods, summer 2011 and winter 2012. For the assessment of potential emission sources of PAHs, an analysis of the profile of PAHs and use of diagnostic ratios were held in the two sampling sites.
Merging of Elliptical Galaxies as Possible Origin of the Intergalactic Stellar Population
Creators: name: Stanghellini, Letizia
name: Gonzalez-Garcia, A. Cesar
name: Manchado, Arturo
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present N-body simulations of elliptical galaxy encounters into dry mergers to study the resulting unbound intergalactic stellar population, in particular that of the post-Main Sequence stars. The systems studied are pairs of spherical galaxies without dark halos. The stellar content of the model galaxies is distributed into mass-bins representing low- and intermediate-mass stars (0.85 -- 8 solar masses) according to Salpeter's initial mass function. Our models follow the dynamical evolution of galaxy encounters colliding head-on from initial low-energy parabolic or high-energy mildly-hyperbolic orbits, and for a choice of initial-mass ratios. The merging models with initial parabolic orbits have M2/M1 =1 and 10, and they leave behind respectively 5.5 % and 10 % of the total initial mass as unbound stellar mass. The merging model with initial hyperbolic orbit has M2/M1 =1, and leaves behind 21 % of its initial stellar mass as unbound mass, showing that the efficiency in producing intergalactic stars through a high-energy hyperbolic encounter is about four times than through a parabolic encounter of the same initial mass ratio. By assuming that all progenitor galaxies as well as the merger remnants are homologous systems we obtained that the intergalactic starlight is 17 % and 28 % of the total starlight respectively for the parabolic and hyperbolic encounters with M2/M1 =1. In all models, different mass stars have the same probability of becoming unbound and feeding the intergalactic stellar population.
description: The Astrophysical Journal, in press
Visual Causality Analysis of Event Sequence Data
Creators: name: Jin, Zhuochen
name: Guo, Shunan
name: Chen, Nan
name: Weiskopf, Daniel
name: Gotz, David
name: Cao, Nan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Causality is crucial to understanding the mechanisms behind complex systems and making decisions that lead to intended outcomes. Event sequence data is widely collected from many real-world processes, such as electronic health records, web clickstreams, and financial transactions, which transmit a great deal of information reflecting the causal relations among event types. Unfortunately, recovering causalities from observational event sequences is challenging, as the heterogeneous and high-dimensional event variables are often connected to rather complex underlying event excitation mechanisms that are hard to infer from limited observations. Many existing automated causal analysis techniques suffer from poor explainability and fail to include an adequate amount of human knowledge. In this paper, we introduce a visual analytics method for recovering causalities in event sequence data. We extend the Granger causality analysis algorithm on Hawkes processes to incorporate user feedback into causal model refinement. The visualization system includes an interactive causal analysis framework that supports bottom-up causal exploration, iterative causal verification and refinement, and causal comparison through a set of novel visualizations and interactions. We report two forms of evaluation: a quantitative evaluation of the model improvements resulting from the user-feedback mechanism, and a qualitative evaluation through case studies in different application domains to demonstrate the usefulness of the system.
Optical transfer cavity stabilization using current-modulated injection-locked diode lasers
Creators: name: Bohlouli-Zanjani, P.
name: Afrousheh, K.
name: Martin, J. D. D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Optics (physics.optics)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: It is demonstrated that RF current modulation of a frequency stabilized injection-locked diode laser allows the stabilization of an optical cavity to adjustable lengths, by variation of the RF frequency. This transfer cavity may be used to stabilize another laser at an arbitrary wavelength, in the absence of atomic or molecular transitions suitable for stabilization. Implementation involves equipment and techniques commonly used in laser cooling and trapping laboratories, and does not require electro- or acousto-optic modulators. With this technique we stabilize a transfer cavity using a RF current-modulated diode laser which is injection locked to a 780 nm reference diode laser. The reference laser is stabilized using polarization spectroscopy in a Rb cell. A Ti:sapphire ring laser at 960 nm is locked to this transfer cavity and may be precisely scanned by varying the RF modulation frequency. We demonstrate the suitability of this system for the excitation of laser cooled Rb atoms to Rydberg states.
An edge-based architecture to support the execution of ambience intelligence tasks using the IoP paradigm
Creators: name: Alanezi, Khaled
name: Mishra, Shivakant
Publisher: name: arXiv
Year: 2020
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: In an IoP environment, edge computing has been proposed to address the problems of resource limitations of edge devices such as smartphones as well as the high-latency, user privacy exposure and network bottleneck that the cloud computing platform solutions incur. This paper presents a context management framework comprised of sensors, mobile devices such as smartphones and an edge server to enable high performance, context-aware computing at the edge. Key features of this architecture include energy-efficient discovery of available sensors and edge services for the client, an automated mechanism for task planning and execution on the edge server, and a dynamic environment where new sensors and services may be added to the framework. A prototype of this architecture has been implemented, and an experimental evaluation using two computer vision tasks as example services is presented. Performance measurement shows that the execution of the example tasks performs quite well and the proposed framework is well suited for an edge-computing environment.
description: Journal paper
IRCS/Subaru Observations of Water in the Inner Coma of Comet 73P-B/Schwassmann-Wachmann 3: Spatially Resolved Rotational Temperatures and Ortho-Para Ratios
Creators: name: Bonev, Boncho P .
name: Mumma, Michael J.
name: Kawakita, Hideyo
name: Kobayashi, Hitomi
name: Villanueva, Geronimo L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Comet 73P-B/Schwassmann-Wachmann 3 was observed with IRCS/Subaru at geocentric distance of 0.074 AU on UT 10 May 2006. Multiple H2O emission lines were detected in non-resonant fluorescence near 2.9 microns. No significant variation in total H2O production rate was found during the (3 hour) duration of our observations. H2O rotational temperatures and ortho-to-para abundance ratios were measured for several positions in the coma. The temperatures extracted from two different time intervals show very similar spatial distributions. For both, the rotational temperature decreased from ~110 K to ~90 K as the projected distance from the nucleus increased from ~5 to ~30 km. We see no evidence for OPR change in the coma. The H2O ortho-para ratio is consistent with the statistical equilibrium value (3.0) for all spatially resolved measurements. This implies a nuclear spin temperature higher than ~ 45 K.
description: accepted for Icarus
Actinium-225 Production with an Electron Accelerator
Creators: name: Diamond, W. T.
name: Ross, C. K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: There has been growing clinical evidence of the value of targeted alpha therapy for treatment of several cancers. The work has been slowed by the lack of availability of the key alpha emitting isotopes, especially Ac-225. Until this time, most of the supply has been from three Th-229 generators that are milked to produce hundreds of mCi of Ac-225 every month. There has been a growing effort to produce new sources of Ac-225 from several different accelerator-based routes. It can be produced with medical-isotope cyclotrons with a proton energy of at least 16 MeV using the reaction Ra-226(p,2n)Ac-225. It can also be produced by using high-energy protons (150 to 800 MeV) for spallation of a thorium target. Significant experimental work has been applied to both processes. It can also be produced by the photonuclear reaction, Ra-226(γ,n)Ra-225. The Ra-225 decays via beta decay to Ac-225 with a half life of 14.9 days. The photons are produced by an intense beam of electrons with an energy about 25 to 30 MeV. This paper will provide a technical description of radium targets and a target chamber that would be capable of producing a yield of four curies of Ra-225 from a 10-day irradiation of one gram of radium segmented into two to four separate encapsulated targets, at a beam power of 20 kW. These targets could be milked at least three times, yielding nearly four curies of Ac-225. There is also a description of a method to reduce production of Ac-227 to values less than a few parts per million of the yield of Ac-225. The Monte Carlo code Fluka has been used to model the yields of Ra-225 and support the design concept to reduce the production of Ac-227. It has also been used to model the experimental results by Maslov et al. [https://doi.org/10.1134/S1066362206020184] to provide reasonable confidence in the cross-section value used by the code.
description: 37 pages, 19 figures, 6 tables Submitted to Journal of Applied Physics
Computer art in an elementary school computer studio : how do students learn to develop computer art images?
Creators: name: Bell, Joanne Marjorie
Publisher: name: University of British Columbia
Year: 2009

description: This research was concerned with how grade four and five students developed original computer art images. I was the teacher-researcher, using action research to investigate my own interests within my classroom, and the District Computer Helping Teacher was my "critical friend". Twelve cycles of planning, acting, observing, and reflecting took place as data was gathered using qualitative data gathering techniques. Data was then analyzed and organized into two themes, Image Development and Cooperative Interactions. Though many guiding questions were used, three main research questions were focussed on. The secondary research question was how do students use cooperative interactions to develop individual and shared original computer art images? A key finding was that students exhibit more cooperative interactions with a partner when developing a shared image than when working on individual images. The primary research question was how does the student's original computer art change over the course of the study? A key finding was that when developing their images, students should be encouraged to do their own problem solving, but if they copy teachers should encourage them to extend the copied image. The overarching research question, How do students learn to develop original computer art images?, was ever present throughout the study. A significant finding was that students' use of boundaries, shape and size of image perimeter, for their computer images need to enhance their ideas for their image. The study concludes with questions for further research that the findings from this study uncovered.
Yang-Mills condensate dark energy coupled with matter and radiation
Creators: name: Zhang, Y.
name: Xia, T. Y.
name: Zhao, W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The coincidence problem is studied for the dark energy model of effective Yang-Mills condensate in a flat expanding universe during the matter-dominated stage. The YMC energy $ρ_y(t)$ is taken to represent the dark energy, which is coupled either with the matter, or with both the matter and the radiation components. The effective YM Lagrangian is completely determined by quantum field theory up to 1-loop order. It is found that under very generic initial conditions and for a variety of forms of coupling, the existence of the scaling solution during the early stages and the subsequent exit from the scaling regime are inevitable. The transition to the accelerating stage always occurs around a redshift $z\simeq (0.3\sim 0.5)$. Moreover, when the Yang-Mills condensate transfers energy into matter or into both matter and radiation, the equation of state $w_y$ of the Yang-Mills condensate can cross over -1 around $z\sim 2$, and takes on a current value $\simeq -1.1$. This is consistent with the recent preliminary observations on supernovae Ia. Therefore, the coincidence problem can be naturally solved in the effective YMC dark energy models.
description: 24 pages, 18 figures