cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The dynamical formation of LMXBs in dense stellar environments: globular clusters and the inner bulge of M31
Creators: name: Voss, Rasmus
name: Gilfanov, Marat
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The radial distribution of luminous L_X>10^{36} erg/s X-ray point sources in the bulge of M31 is investigated using archival Chandra observations. We find a significant increase of the specific frequency of X-ray sources, per unit stellar mass, within 1 arcmin from the centre of the galaxy. The radial distribution of surplus sources in this region follows the density squared law, suggesting that they are low-mass X-ray binaries formed dynamically in the dense inner bulge. We investigate dynamical formation of LMXBs, paying particular attention to the high velocity regime characteristic for galactic bulges, which has not been explored previously. Our calculations suggest that the majority of the surplus sources are formed in tidal captures of black holes by main sequence stars of low mass, M<0.3-0.4 M_sol, with some contribution of NS systems of same type. Due to the small size of the accretion discs a fraction of such systems may be persistent X-ray sources. Some of sources may be ultra-compact X-ray binaries with helium star/white dwarf companions. We also predict a large number of faint transients, both NS and BH systems, within 1 arcmin from the M31 galactic centre. Finally, we consider the population of dynamically formed binaries in Galactic globular clusters, emphasizing the differences between these two types of stellar environments
description: 18 pages, published in MNRAS
Ελευθερία της έκφρασης και ρατσιστικός λόγος: Η ειδική περίπτωση της δημόσιας άρνησης ή επιδοκιμασίας εγκλημάτων (άρ. 2 του ν. 4285/2014
Creators: name: Θεοδωρίδου, Μαρία Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Ελευθερία της έκφρασης
Ρατσιστικός λόγος
Άρνηση εγκλημάτων
Επιδοκιμασία εγκλημάτων
Άρνηση Ολοκαυτώματος
Freedom of expression
Hate speech
Denial of crimes
Approval of crimes
Holocaust denial

description: Σκοπός της παρούσας μελέτης είναι η εξέταση της σχέσης της ελευθερίας της έκφρασης με την ποινικοποίηση της δημόσιας άρνησης ή επιδοκιμασίας εγκλημάτων ως μορφής ρητορικής μίσους. Αρχικά, γίνεται μία σύντομη αναφορά στο θεμελιώδες δικαίωμα της ελευθερίας της έκφρασης και στους επιτρεπτούς περιορισμούς της. Στη συνέχεια παρουσιάζεται αναλυτικά το άρθρο 2 του νόμου 4285/2014 που ενσωμάτωσε την απόφαση-πλαίσιο 2008/913/ΔΕΥ του Συμβουλίου της Ευρώπης για την καταπολέμηση συγκεκριμένων μορφών και εκφράσεων ρατσισμού και ξενοφοβίας. Στο άρθρο αυτό προβλέπεται η ποινική τιμώρηση της δημόσιας άρνησης ή επιδοκιμασίας ή ευτελισμού των εγκλημάτων στην ελληνική έννομη τάξη. Έπειτα, παρατίθεται μία συγκριτική επισκόπηση της πρόβλεψης αυτού του εγκλήματος σ’ άλλες έννομες τάξεις της Ευρώπης με ειδικότερη μνεία στη Γαλλία. Τέλος, επιχειρείται μία κριτική ανάλυση με τα επιχειρήματα υπέρ και κατά της ποινικοποίησης της δημόσιας άρνησης και γίνεται μία προσπάθεια όχι μόνο απάντησης στο θεμιτό ή μη της ποινικοποίησης με βάση την ελευθερία της έκφρασης, αλλά και πρότασης αντιμετώπισης του αντισημιτισμού μέσω της κατάλληλης παιδείας
description: The purpose of this study is to examine the relation between the freedom of expression and the criminalization of public denial or approval of crimes as a form of hate speech. Initially, the fundamental right of freedom of expression and its legitimate limitations are cited. Afterwards, the article 2 of 4285/2014 law which incorporates the Council Framework Decision 2008/913/JHA on combating certain forms and expressions of racism and xenophobia is explicitly presented. In this article the criminalization of public denial or approval or trivialization of crimes is postulated in Greek legislation. Then, a comparison of penal punishment of the aforementioned crime in the other countries of Europe is stated with a specific mention in France. Finally, a critical review with all the arguments in favor and against the criminalization of public denial is attempted and an effort is made not only to answer if the criminalization of public denial is legitimate according to the freedom of expression, but also to suggest combating the anti - Semitism via appropriate education
Inverse design of plasma metamaterial devices for optical computing
Creators: name: Rodriguez, Jesse A.
name: Abdalla, Ahmed I.
name: Wang, Benjamin
name: Lou, Beicheng
name: Fan, Shanhui
name: Cappelli, Mark A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: Optics (physics.optics)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We apply inverse design methods to produce two-dimensional plasma metamaterial (PMM) devices. Backpropagated finite difference frequency domain (FDFD) simulations are used to design waveguides and demultiplexers operating under both transverse electric (TE) and transverse magnetic (TM) modes. Demultiplexing and waveguiding are demonstrated for devices composed of plasma elements with reasonable plasma densities ~7 GHz, allowing for future in-situ training and experimental realization of these designs. We also explore the possible applicability of PMMs to nonlinear boolean operations for use in optical computing. Functionally complete logical connectives (OR and AND) are achieved in the TM mode.
Ο Αντιγνωστικισμός στο έργο του Κλήμεντος του Αλεξανδρέως
Creators: name: Χαμπίδης, Παντελεήμων Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Αντιγνωστικισμός
Γνωστικισμός
Κλήμης Αλεξανδρεύς
Antignosticism
Gnosticism
Clement of Alexandria

description: Η συγκεκριμένη μεταπτυχιακή εργασία αποσκοπεί στην παρουσίαση της πολεμικής του Κλήμεντος του Αλεξανδρέως κατά της πρωτοχριστιανικής αίρεσης του Γνωστικισμού. Αυτή χωρίζεται στο γραμματολογικό μέρος με τα πρώτα τρία κεφάλαια, την εργογραφία, την κριτική των κειμένων του συγγραφέα και τη θεολογία του, και στο θεολογικό με τέταρτο κεφάλαιο τον Αντιγνωστικισμό του. Μεθοδολογικά χρησιμοποιήθηκε η ιστορικοφιλολογική μέθοδος. Ο Αντιγνωστικισμός αποτελεί το τελευταίο κεφάλαιο της εργασίας, όπου εκεί σε ξεχωριστή ενότητα μελετώνται αρχικά τα χαρακτηριστικά του γνωστικισμού με ιδιαίτερη έμφαση στο σύστημα του Ουαλεντίνου, μετά οι βασικοί εκπρόσωποι του γνωστικισμού, όπως αυτοί εντοπίζονται στις κλημέντιες πραγματείες. Τέλος, παρουσιάζονται τα σημεία, όπου εκφράζεται ο αντιγνωστικισμός του συγγραφέα. Αυτά είναι η αποστροφή της ύλης από τους γνωστικούς, η διαρχία, η χριστολογία και η γνώση
description: The specific Master-Thesis aims to the presentation of Clement of Alexandria’s polemic against the ancient-Christian heresy of Gnosticism. It consists of the grammatological part with the first three chapters, the works, the critical approach of the writer’s texts and his theology, and of the theological with the fourth chapter, his Antignosticism. Concerning the methodology, the historic-philological method was applied. Antignosticism is the last chapter of the Thesis. There in different sections Gnosticism’s characteristics are examined, giving emphasis to the system of Valentine and after him to the basic representatives of Gnosticism, as they are to be found in Clement’s works. Finally, other points are presented, where his Antignosticism takes place. Those are the detestation of matter from the Gnostics, dualism, Christology and knowledge
Verschiedenes
Creators: name: IZGOnZeit, Redaktion
Publisher: name: IZGOnZeit. Onlinezeitschrift des Interdisziplinären Zentrums für Geschlechterforschung (IZG)
Year: 2014

description: IZGOnZeit. Onlinezeitschrift des Interdisziplinären Zentrums für Geschlechterforschung (IZG), IFFOnZeit Nr. 3 (2014)
Additional file 1 of Dominant mutations in MIEF1 affect mitochondrial dynamics and cause a singular late onset optic neuropathy
Creators: name: Charif, Majida
name: Wong, Yvette C.
name: Soojin Kim
name: Guichet, Agnès
name: Vignal, Catherine
name: Zanlonghi, Xavier
name: Bensaid, Philippe
name: Procaccio, Vincent
name: Bonneau, Dominique
name: Amati-Bonneau, Patrizia
name: Reynier, Pascal
name: Krainc, Dimitri
name: Lenaers, Guy
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Cancer
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Additional file 1: Supplementary Table 1. Targeted sequencing panel of ION genes and genes involved in mitochondrial dynamics.
Elicitation notes on tense, aspect, mood, and negation
Creators: name: Kelsey, Loretta
name: Crane, Thera
name: Fenton, Donna
name: Newbold, Lindsey
name: Hinton, Leanne
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: pom

description: 1 PDF file.
Kitap Tanıtımı: Ermeni Kilise Merkezi: Ecmiatzin
Creators: name: YEŞİL, Cüneyt
Publisher: name: Zenodo
Year: 2019
Subjects: Dinler Tarihi, Ecmiatzin, Ermeni Kilisesi

description: Ecmiatzin Kat’oğikosluğu, Hıristiyanlık içerisinde bağımsız bir kilise olan Ermeni Kilisesi’nin ana ruhani idari merkezidir. Ecmiatzin ise Ermenistan Cumhuriyeti başkenti Erivan’a 25 km uzaklıkta, Aras’ın kollarından Zengi Çayı’nın kenarında kurulmuş eski bir yerleşim yeridir. Eser, bir Ermeni Kilise merkezi olan kat’oğikosluğun oluşumu, taşınma süreci ve Ermeni Kilisesi’ndeki yeri konularını Ermeni Hıristiyan tarihinden yola çıkarak ayrıntılı şekilde ele almaktadır. Bu konusuyla kat’oğikosluk hakkında yapılmış ilk müstakil araştırma ve inceleme çalışması olması bakımından çalışma dikkate değerdir.
Additional file 1 of Mapping regional forest management units: a road-based framework in Southeastern Coastal Plain and Piedmont
Creators: name: Yang, Di
name: Chiung-Shiuan Fu
Publisher: name: figshare
Year: 2021
Subjects: subject: Space Science
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy
subject: Plant Biology
subject: Cardiology

description: Additional file 1.
Electronic structure and magnetic properties of graphitic ribbons
Creators: name: Pisani, L.
name: Chan, J. A.
name: Montanari, B.
name: Harrison, N. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: First principles calculations are used to establish that the electronic structure of graphene ribbons with zig-zag edges is unstable with respect to magnetic polarisation of the edge states. The magnetic interaction between edge states is found to be remarkably long ranged and intimately connected to the electronic structure of the ribbon. Various treatments of electronic exchange and correlation are used to examine the sensitivity of this result to details of the electron-electron interactions and the qualitative features are found to be independent of the details of the approximaton. The possibility of other stablisation mechanisms, such as charge ordering and a Peierls distortion, are explicitly considered and found to be unfavourable for ribbons of reasonable width. These results have direct implications for the control of the spin dependent conductance in graphitic nano-ribbons using suitably modulated magnetic fields.
description: 10 pages, 12 figures
Elicitation notes on imperative mood, demonstrative adjectives, and verbs of motion
Creators: name: Kelsey, Loretta
name: Hong, Jisup
name: Lee-Goldman, Russell
name: Piqueras-Brunet, Marta
name: Hinton, Leanne
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: pom

description: 1 PDF file.
Additional file 2 of Incidence and predictors of tuberculosis among HIV patients after initiation of antiretroviral treatment in Ethiopia: a systematic review and meta-analysis
Creators: name: Melkalem Mamuye Azanaw
name: Nebiyu Mekonnen Derseh
name: Gebeyehu Shumuye Yetemegn
name: Angaw, Dessie Abebaw
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Additional file 2. The funnel plot and Egger’s regression tests.
Additional file 1 of Evaluating the effects of electronic health records system adoption on the performance of Malaysian health care providers
Creators: name: Salleh, Mohd Idzwan Mohd
name: Rosni Abdullah
name: Nasriah Zakaria
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Science Policy

description: Additional file 1. Survey Questionnaire.
Quasiclassical theory of electronic transport in mesoscopic systems: Luttinger liquids revisited
Creators: name: Eckern, U.
name: Schwab, P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The method of the quasiclassical Green's function is used to determine the equilibrium properties of one-dimensional (1D) interacting Fermi systems, in particular, the bulk and the local (near a hard wall) density of states. While this is a novel approach to 1D systems, our findings do agree with standard results for Luttinger liquids obtained with the bosonization method. Analogies to the so-called $P(E)$ theory of tunneling through ultrasmall junctions are pointed out and are exploited. Further applications of the Green's function method for 1D systems are discussed.
description: 7 pages, Proceedings of ECNM06, Ustron, Poland (references added)
Τρισδιάστατη μοντελοποίηση της ελαστικότητας και του σχήματος του ερυθροκυττάρου
Creators: name: Σκαλτσογιάννης, Αθανάσιος Απόστολου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Μοντελοποίηση
Ελαστικότητα
Ερυθροκύτταρο
Modelling
Elasticity
Red blood cell

description: Σκοπός της παρούσας εργασίας είναι η ανάπτυξη και αξιολόγηση ενός γενικευμένου μαθηματικού μοντέλου για την περιγραφή της δομής του ερυθροκυττάρου στις τρεις διαστάσεις. Η κυτταρική μεμβράνη αναπαραστάθηκε χρησιμοποιώντας σωματίδια που ενώνονται με ελατήρια με τη συνολική ενέργεια να περιλαμβάνει μία συνεισφορά στο επίπεδο, μία λόγω κάμψης και περιορισμούς για τον συνολικό όγκο που περικλείεται εντός της, καθώς και για τη συνολική επιφάνεια. Το μοντέλο που αναπτύχθηκε περιλαμβάνει τον αριθμό των κόμβων ως παράμετρο ώστε να επιτρέπεται η μείωση των βαθμών ελευθερίας και άρα του υπολογιστικού κόστους. Στα αποτελέσματα της εργασίας αυτής είναι η ανάπτυξη του αλγορίθμου και τελικά το γνωστό αμφίκοιλο δισκοειδές σχήμα που έχει παρατηρηθεί πειραματικά. Η τιμή του όγκου και της επιφάνειας για το σχήμα που προέκυψε είναι V=87,9 μm3 και Α=139 μm2. Υπολογίστηκαν επίσης ο συντελεστής διάτμησης της μεμβράνης μ = 8,6 μΝ/m, το μέτρο συμπιεστότητας της επιφάνειας Κ = 17 μΝ/m, το μέτρο Young Ε = 21,8 μΝ/m και ο λόγος Poisson v = 1/3. Οι τιμές αυτές είναι σε απόλυτη συμφωνία με πειραματικές μετρήσεις. Το μοντέλο εφαρμόστηκε για 400 και 100 κόμβους και έδωσε τα ίδια αποτελέσματα αποδεικνύοντας την εγκυρότητα του για οποιονδήποτε αριθμό κόμβων. Τέλος μελετήθηκε η επίδραση των συντελεστών Κ των ενεργειών στο σχήμα ισορροπίας και ταυτοποιήθηκαν περιπτώσεις σχημάτων που έχουν αναφερθεί σε παθολογικές περιπτώσεις, όπως η δρεπανοκυτταρική αναιμία και η ελλειπτοκυττάρωση
description: The purpose of this master thesis is to develop and evaluate a generalized mathematical model for describing the erythrocyte 3D structure. The cell membrane was described using springs joined together with the total energy comprising an in-plane and a bending contribution as well as limitations for the total volume and surface. The model developed includes the number of nodes as a parameter to allow for the reduction of degrees of freedom and thus the computational cost. The results of this work include the development of the algorithm and the biconcave shape that has been observed experimentally. The values of the volume and the surface area for the resulting shape are V = 87.9 μm3 and A = 139 μm2 respectively. The macroscopic mechanical properties of the membrane were also calculated (shear modulus of the membrane μ = 8.6 μN / m, dilatational modulus K = 17 μN / m, Young modulus E = 21.8 μN / m and Poisson ration v = 1/3). These values are in full agreement with experimental measurements. The model was applied for 400 and 100 nodes and gave the same results demonstrating its validity for any number of nodes. Finally, the effect of the energy constants K on the equilibrium shape was also studied and cases of patterns reported in pathological cases, such as sickle-cell anemia and elliptocytosis, were identified
Additional file 1 of Incidence and predictors of tuberculosis among HIV patients after initiation of antiretroviral treatment in Ethiopia: a systematic review and meta-analysis
Creators: name: Melkalem Mamuye Azanaw
name: Nebiyu Mekonnen Derseh
name: Gebeyehu Shumuye Yetemegn
name: Angaw, Dessie Abebaw
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Additional file 1. Egger test for publication bias for incidences of tuberculosis in Ethiopia.
Καθημερινές, τελετουργικές, θεραπευτικές χρήσεις των φυτών στη σύγχρονη αγροτική Ελλάδα
Creators: name: Χτενέλης, Γεώργιος Ανδρέα
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Μνήμη
Υλικός Πολιτισμός
Γουμένισσα
Memory
Material Culture
Goumenissa

description: Η Μεταπτυχιακή Διπλωματική Εργασία βασίζεται σε επιτόπια εθνογραφική έρευνα που έγινε στη Γουμένισσα του Νομού Κιλκίς. Στόχοι της εργασίας ήταν η καταγραφή των χρή-σεων των φυτών στη Γουμένισσα, όπως των καλλιεργητικών δραστηριοτήτων και των διατροφικών χρήσεων τους. Μεγαλύτερη έμφαση δίνεται στην αμπελοκαλλιέργεια και στις χρήσεις των προϊόντων της, καθώς αποτελεί έμβλημα της περιοχής για τους κατοί-κους. Πιο συγκεκριμένα, εξετάζεται η διαδικασία παραγωγής των οίνων Ονομασίας Προ-έλευσης «Γουμένισσα» ως προς τις πρακτικές των ερασιτεχνών αμπελουργών της Γουμέ-νισσας. Μέσα από αυτήν τη σύγκριση γίνονται εμφανείς διαφορές μεταξύ εμπορευμα-τοποιημένης «παράδοσης» και μη-εμπορικών πρακτικών που ακολουθούνται μέχρι σή-μερα. Στη συνέχεια, γίνεται αναφορά στις μνήμες των κατοίκων της Γουμένισσας, οι ο-ποίες είναι μια ανάκληση ενός συνόλου γεύσεων και άλλων σωματικών αισθήσεων. Πρό-κειται για μνήμες που αναδεικνύουν μια διαφορετική εικόνα του παρελθόντος από αυ-τήν που παρουσιάζεται στο επίσημο αφήγημα περί «παραδόσεων». Τέλος, εξετάζονται οι παραπάνω βιωματικές εικόνες των ανθρώπων της Γουμένισσας ως προς τις μονοδιάστα-τες αναπαραστάσεις του παρελθόντος που παρουσιάζουν οι πολιτιστικοί σύλλογοι της κωμόπολης. Οι προσπάθειες αναβίωσης, διάσωσης και διατήρησης της «παράδοσης» από τους συλλόγους διαφέρουν σε μεγάλο βαθμό από τον τρόπο με τον οποίο η παρα-δοσιακή γνώση μεταβιβαζόταν στο παρελθόν από άτομο σε άτομο και από γενιά σε γε-νιά μέσα από τις καθημερινές δραστηριότητες των ανθρώπων
description: This thesis is based on ethnographic fieldwork done in Goumenissa, in the Prefecture of Kilkis. Goals of this thesis were the recording of the uses of plants in Goumenissa, such as agriculture practices and culinary uses. Main emphasis is put on viticulture and its products, since it constitutes emblem of the region for its residents. Specifically, the process of pro-ducing wine with Designation of Origin “Goumenissa” is examined in relation to the prac-tices of the amateur viticulturists of Goumenissa. Through this comparison, differences between the commercialised “tradition” and non-commercialised practices used to this day become apparent. Afterwards, the memories of the residents of Goumenissa are touched upon, which are evocations of a set of tastes and other embodied sentiments. They are memories showing a picture of the past differently from the picture the official narrative about “traditions” presents. Lastly, the above lived pictures of the people of Goumenissa are examined in comparison to the town’s cultural associations’ one-dimensional repre-sentations of the past. The effort of the associations to revive, rescue and conserve the “tradition” differs, to a great degree, from the way traditional knowledge passed from per-son to person and from generation to generation, in the past, through the daily practices of people
Chiralities of nodal points along high symmetry lines with screw rotation symmetry
Creators: name: González-Hernández, Rafael
name: Tuiran, Erick
name: Uribe, Bernardo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Algebraic Topology (math.AT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Screw rotations in nonsymmorphic space group symmetries induce the presence of hourglass and accordion shape band structures along screw invariant lines whenever spin-orbit coupling is nonnegligible. These structures induce topological enforced Weyl points on the band intersections. In this work we show that the chirality of each Weyl point is related to the representations of the cyclic group on the bands that form the intersection. To achieve this, we calculate the Picard group of isomorphism classes of complex line bundles over the 2-dimensional sphere with cyclic group action, and we show how the chirality (Chern number) relates to the eigenvalues of the rotation action on the rotation invariant points. Then we write an explicit Hamiltonian endowed with a cyclic action whose eigenfunctions restricted to a sphere realize the equivariant line bundles described before. As a consequence of this relation, we determine the chiralities of the nodal points appearing on the hourglass and accordion shape structures on screw invariant lines of the nonsymmorphic materials PI3 (SG: P63), Pd3N (SG: P6322), AgF3 (SG: P6122) and AuF3 (SG: P6122), and we corroborate these results with the Berry curvature and symmetry eigenvalues calculations for the electronic wavefunction.
description: 10 pages, 4 figures
Primordial black holes from a cosmic phase transition: The collapse of Fermi-balls
Creators: name: Kawana, Kiyoharu
name: Xie, Ke-Pan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose a novel primordial black hole (PBH) formation mechanism based on a first-order phase transition (FOPT). If a fermion species gains a huge mass in the true vacuum, the corresponding particles get trapped in the false vacuum as they do not have sufficient energy to penetrate the bubble wall. After the FOPT, the fermions are compressed into the false vacuum remnants to form non-topological solitons called Fermi-balls, and then collapse to PBHs due to the Yukawa attractive force. We derive the PBH mass and abundance, showing that for a $\mathcal{O}({\rm GeV})$ FOPT the PBHs could be $\sim10^{17}$ g and explain all of dark matter. If the FOPT happens at higher scale, PBHs are typically overproduced and extra dilution mechanism is necessary to satisfy current constraints.
description: 5 pages + 2 figures + references and appendix. To appear on PLB
Quantum decoherence of a charge qubit in a spin-fermion model
Creators: name: Lutchyn, R. M.
name: Cywinski, L.
name: Nave, Cody P.
name: Sarma, S. Das
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider quantum decoherence in solid-state systems by studying the transverse dynamics of a single qubit interacting with a fermionic bath and driven by external pulses. Our interest is in investigating the extent to which the lost coherence can be restored by the application of external pulses to the qubit. We show that the qubit evolution under various pulse sequences can be mapped onto Keldysh path integrals. This approach allows a simple diagrammatic treatment of different bath excitation processes contributing to qubit decoherence. We apply this theory to the evolution of the qubit coupled to the Andreev fluctuator bath in the context of widely studied superconducting qubits. We show that charge fluctuations within the Andreev-fluctuator model lead to a 1/f noise spectrum with a characteristic temperature depedence. We discuss the strategy for suppression of decoherence by the application of higher-order (beyond spin echo) pulse sequences.
description: 7 pages, 4 figures; extended version (accepted to Phys. Rev. B)
Collinear antiferromagnetic order in URu$_2$Si$_{2-x}$P$_x$ revealed by neutron diffraction
Creators: name: Rahn, M. C.
name: Gallagher, A.
name: Orlandi, F.
name: Khalyavin, D. D.
name: Hoffmann, C.
name: Manuel, P.
name: Baumbach, R.
name: Janoschek, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The hidden order phase in URu$_2$Si$_2$ is highly sensitive to electronic doping. A special interest in silicon-to-phosphorus substitution is due to the fact that it may allow one, in part, to isolate the effects of tuning the chemical potential from the complexity of the correlated $f$ and $d$ electronic states. We investigate the new antiferromagnetic phase that is induced in URu$_2$Si$_{2-x}$P$_x$ at $x\gtrsim0.27$. Time-of-flight neutron diffraction of a single crystal ($x=0.28$) reveals $c$-axis collinear $\mathbf{q}_\mathrm{m}=(\frac12,\frac12,\frac12)$ magnetic structure with localized magnetic moments ($\approx2.1\,μ_\mathrm{B}$). This points to an unexpected analogy between the (Si,P) and (Ru,Rh) substitution series. Through further comparisons with other tuning studies of URu$_2$Si$_2$, we are able to delineate the mechanisms by which silicon-to-phosphorus substitution affects the system. In particular, both the localization of itinerant 5$f$ electrons as well as the choice of $\mathbf{q}_m$ appears to be consequences of the increase in chemical potential. Further, enhanced exchange interactions are induced by chemical pressure and lead to magnetic order, in which an increase in inter-layer spacing may play a special role.
Polarimetry toward the IRAS Vela Shell. II. Extinction and Magnetic Fields
Creators: name: Pereyra, A.
name: Magalhães, A. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We explore correlations between visual extinction and polarization along the western side of the IRAS Vela Shell using a published polarimetric catalog of several hundreds of objects. Our extinction maps along this ionization front (I-front) find evidence of clumpy structure with typical masses between 1.5 and 6 solar masses and a mean length scale L ~ 0.47pc. The polarimetric data allowed us to investigate the distribution of the local magnetic field in small (~pc) scales across the I-front. Using the dispersion of polarization position angles, we find variations in the kinetic-to-magnetic energy density ratio of, at least, one order of magnitude along the I-front, with the magnetic pressure generally dominating over the turbulent motions. These findings suggest that the magnetic component has a significant contribution to the dynamical balance of this region. Along the I-front, the mean magnetic field projected on the sky is [0.018 +/- 0.013]mG. The polarization efficiency seems to change along the I-front. We attribute high polarization efficiencies in regions of relatively low extinction to an optimum degree of grain alignment. Analysis of the mass-to-magnetic flux ratio shows that this quantity is consistent with the subcritical regime (lambda < 1), showing that magnetic support is indeed important in the region. Our data extend the overall lambda-N(H2) relation toward lower density values and show that such trend continues smoothly toward low N(H2) values. This provides general support for the evolution of initially subcritical clouds to an eventual supercritical stage.
description: 31 pages, 9 figures. Accepted for publication in ApJ
One qubit almost completely reveals the dynamics of two
Creators: name: Jordan, Thomas F.
name: Shaji, Anil
name: Sudarshan, E. C. G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: From the time dependence of states of one of them, the dynamics of two interacting qubits is determined to be one of two possibilities that differ only by a change of signs of parameters in the Hamiltonian. The only exception is a simple particular case where several parameters in the Hamiltonian are zero and one of the remaining nonzero parameters has no effect on the time dependence of states of the one qubit. The mean values that describe the initial state of the other qubit and of the correlations between the two qubits also are generally determined to within a change of signs by the time dependence of states of the one qubit, but with many more exceptions. An example demonstrates all the results. Feedback in the equations of motion that allows time dependence in a subsystem to determine the dynamics of the larger system can occur in both classical and quantum mechanics. The role of quantum mechanics here is just to identify qubits as the simplest objects to consider and specify the form that equations of motion for two interacting qubits can take.
description: 6 pages with new and updated material
First measurement of large area jet transverse momentum spectra in heavy-ion collisions
Creators: name: CMS Collaboration
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Jet production in lead-lead (PbPb) and proton-proton (pp) collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV is studied with the CMS detector at the LHC, using PbPb and pp data samples corresponding to integrated luminosities of 404 $μ$b$^{-1}$ and 27.4 pb$^{-1}$, respectively. Jets with different areas are reconstructed using the anti-$k_\mathrm{T}$ algorithm by varying the distance parameter $R$. The measurements are performed using jets with transverse momenta ($p_\mathrm{T}$) greater than 200 GeV and in a pseudorapidity range of $|η|$ $\lt$ 2. To reveal the medium modification of the jet spectra in PbPb collisions, the properly normalized ratio of spectra from PbPb and pp data is used to extract jet nuclear modification factors as functions of the PbPb collision centrality, $p_\mathrm{T}$ and, for the first time, as a function of $R$ up to 1.0. For the most central collisions, a strong suppression is observed for high-$p_\mathrm{T}$ jets reconstructed with all distance parameters, implying that a significant amount of jet energy is scattered to large angles. The dependence of jet suppression on $R$ is expected to be sensitive to both the jet energy loss mechanism and the medium response, and so the data are compared to several modern event generators and analytic calculations. The models considered do not fully reproduce the data.
description: Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/HIN-18-014 (CMS Public Pages)
Preparation of Many-body Ground States by Time Evolution with Variational Microscopic Magnetic Fields and Incomplete Interactions
Creators: name: Lu, Ying
name: Li, Yue-Min
name: Zhou, Peng-Fei
name: Ran, Shi-Ju
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: State preparation is of fundamental importance in quantum physics, which can be realized by constructing the quantum circuit as a unitary that transforms the initial state to the target, or implementing a quantum control protocol to evolve to the target state with a designed Hamiltonian. In this work, we study the latter on quantum many-body systems by the time evolution with fixed couplings and variational magnetic fields. In specific, we consider to prepare the ground states of the Hamiltonians containing certain interactions that are missing in the Hamiltonians for the time evolution. An optimization method is proposed to optimize the magnetic fields by "fine-graining" the discretization of time, in order to gain high precision and stability. The back propagation technique is utilized to obtain the gradients of the fields against the logarithmic fidelity. Our method is tested on preparing the ground state of Heisenberg chain with the time evolution by the XY and Ising interactions, and its performance surpasses two baseline methods that use local and global optimization strategies, respectively. Our work can be applied and generalized to other quantum models such as those defined on higher dimensional lattices. It enlightens to reduce the complexity of the required interactions for implementing quantum control or other tasks in quantum information and computation by means of optimizing the magnetic fields.
Additional file 6 of Circadian clock gene Clock-Bmal1 regulates cellular senescence in Chronic obstructive pulmonary disease
Creators: name: Li, Lingling
name: Zhang, Min
name: Zhao, Chunyang
name: Cheng, Yusheng
name: Liu, Chuanmei
name: Shi, Minhua
Publisher: name: figshare
Year: 2022
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Molecular Biology
subject: Physiology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Science Policy
subject: Hematology
subject: Plant Biology

description: Additional file 6.
Primordial perturbations in kinetically dominated regimes of general relativity and hybrid quantum cosmology
Creators: name: Navascués, Beatriz Elizaga
name: Jiménez-Llamas, Rafael
name: Marugán, Guillermo A. Mena
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Scalar fields with an energy density dominated by its kinetic part may have played a relevant role in the very early stages of the Universe. Compared to the standard inflationary paradigm, they may lead to modifications in observable quantities, e.g. the anisotropies found in the cosmic microwave background. Kinetically dominated regimes arise in classical fast-roll scenarios as well as in quantum bouncing cosmologies. For instance, kinetic dominance is typical in interesting preinflationary phases of Loop Quantum Cosmology. In this work, we analyze the leading-order effects that the presence of a scalar field potential causes on the primordial cosmological perturbations in these kinetically dominated epochs. These effects can be grouped in two sets, namely, those that affect the effective mass of the perturbations and those that affect the choice of their vacuum state. The effective mass is modified directly by terms that include the potential, but also indirectly by the change in the background dynamics and the relation between the parameterization of these dynamics and the conformal time, usually employed to describe the evolution of the perturbations. On the other hand, away from de Sitter inflation, the Bunch-Davies state is no longer the most natural vacuum at all scales. Recent proposals suggest to modify it by carrying out certain Hamiltonian diagonalization with a suitable asymptotic behavior at large wavenumber scales. Both this diagonalization condition and the imposed asymptotic behavior depend on the effective mass of the perturbations, and therefore the selected vacuum state varies in the presence of the scalar field potential.
description: 17 pages
Halo Assembly Bias in Hierarchical Structure Formation
Creators: name: Dalal, Neal
name: White, Martin
name: Bond, J. Richard
name: Shirokov, Alexander
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the origin of halo assembly bias, the dependence of halo clustering on assembly history. We relate halo assembly to peak properties measured in the Lagrangian space of the initial linear Gaussian random density field, and show how these same Lagrangian properties determine large-scale bias. We focus on the two regimes where assembly bias has been observed to be significant: at masses very large and very small compared to the nonlinear mass scale. At high masses, we show that assembly bias is expected from the statistics of the peaks of Gaussian random fluctuations, and we show that the extent of assembly bias found in N-body simulations of rare halos is in excellent agreement with our theoretical prediction. At low masses, we argue that assembly bias largely arises from a sub-population of low mass halos whose mass accretion has ceased. Due to their arrested development, these halos naturally become unbiased, in contrast to their anti-biased peers. We show that a simple toy model incorporating these effects can roughly reproduce the bias trends found in N-body simulations.
description: 10 pages, color figures, downgraded resolution
Η φωνολογική αναπαράσταση του ημιφώνου της Κοινής Νέας Ελληνικής: Μια προσέγγιση με βάση τη Διαβαθμισμένη Αρμονική Γραμματική
Creators: name: Αποστολοπούλου, Ειρήνη Θωμά
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: ημίφωνο
Κοινή Νέα Ελληνική
Διαβαθμισμένη Αρμονική Γραμματική
glide
Standard Modern Greek
Gradient Harmonic Grammar

description: Η παρούσα εργασία πραγματεύεται το ζήτημα της φωνολογικής αναπαράστασης του νεοελληνικού ημιφώνου j και της σχέσης του με το υψηλό φωνήεν i. Εξετάζονται οι ποικίλες ημιφωνικές πραγματώσεις [j, ʝ, ç, c, ɟ, ʎ, ɲ] (στο εξής [J]) συγκριτικά με τη φωνηεντική πραγμάτωση [i] και προτείνεται μια ανάλυση στο πλαίσιο της Διαβαθμισμένης Αρμονικής Γραμματικής (Smolensky & Goldrick 2016). Συγκεκριμένα, υποστηρίζεται ότι το φωνολογικό σύστημα της Ελληνικής περιλαμβάνει δύο διακριτά φωνήματα /j/ και /i/, τα οποία διαφέρουν ως προς το διακριτικό χαρακτηριστικό [φων]. Βασικό σημείο της ανάλυσης αποτελεί η υπόθεση ότι το συγκεκριμένο χαρακτηριστικό δεν είναι δυαδικό, αλλά διαθέτει στην υποκείμενη δομή ένα διαβαθμισμένο επίπεδο ενέργειας, το οποίο κυμαίνεται μεταξύ των τιμών 0 και 1. Με βάση την παραπάνω υπόθεση υποστηρίζεται ότι το /j/ είναι προσδιορισμένο ως [0φων], ενώ το /i/ ως [xφων], όπου 0 μικρότερο του x μικρότερο ή ίσο του 1, και ότι και οι δύο φωνολογικές αναπαραστάσεις μπορούν να πραγματωθούν είτε ως [i[1φων]] είτε ως [J[0φων]], ανάλογα με το ποια πραγμάτωση παράγει το πιο αρμονικό εξαγόμενο με βάση το σύστημα φωνολογικών περιορισμών της Ελληνικής. Υπό αυτό το πρίσμα δίνεται μια συνολική ερμηνεία για τις σταθερές πραγματώσεις [i] και [J], π.χ. [áðʝa] – [áðia], τις περιπτώσεις συστηματικής εναλλαγής μεταξύ των δύο πραγματώσεων στο πλαίσιο κλιτικών παραδειγμάτων, π.χ. [máti] ~ [mátça], [píno] ~ [ípça], αλλά και τις περιπτώσεις όπου οι δύο πραγματώσεις βρίσκονται σε σχέση ελεύθερης ποικιλίας, π.χ. [neɾájða] ~ [neɾáiða], [téʎosa] ~ [telíosa]
description: This MA thesis explores the underlying representation of the various realizations of the Greek glide j, namely [j, ʝ, ç, c, ɟ, ʎ, ɲ] (henceforth [J]), and its distribution in relation to the high vowel i. Under the framework of Gradient Harmonic Grammar (Smolensky & Goldrick 2016), we propose an analysis that postulates two distinct phonemes /j/ and /i/, which differ in terms of the feature [voc]. Crucially, rather than being binary, [voc] is considered to have a gradient activity level between 0 and 1. Following this hypothesis, we maintain that /j/ is specified as [0voc] and /i/ as [xvoc], where 0 < x ≤ 1, and that both phonological representations can surface as either [i[1voc]] or [J[0voc]], depending on which one yields the most harmonic output on the basis of the Greek constraint system. The proposed analysis provides a comprehensive account for the invariable realizations [i] and [J], e.g. [áðʝa] – [áðia], the systematic alternation between these realizations across inflectional forms, e.g. [máti] ~ [mátça], [píno] ~ [ípça], and the free variation attested in certain lexical environments, e.g. [neɾájða] ~ [neɾáiða], [téʎosa] ~ [telíosa]
Carboniferous variation of crustal thickness and subduction angles in Eastern Tianshan, NW China: evidence from the petrogenesis of the magmatic rocks in the Aqishan–Yamansu Belt
Creators: name: Wu, Bin
name: Long, Xiaoping
name: Zhang, Shitao
name: Zhang, Yunying
name: Huang, Zongying
name: Du, Long
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified

description: New geochronological and geochemical data were presented for the Early Carboniferous basaltic to andesitic volcanic rocks and Late Carboniferous granitic intrusions in the Aqishan–Yamansu Belt of Eastern Tianshan, NW China. Zircon U–Pb dating indicates that the andesite and granite were emplaced at 330 Ma and 321 Ma, respectively. The andesitic rocks of the Yamansu Formation (FM) display subalkaline to calc-alkaline characteristics with moderate SiO2, relatively high Mg# values, and low Cr, Co and Ni, indicating an origin from mantle-derived melts. Their relatively low εNd(t) values (–0.02 ~ +0.61) and old TDM ages (TDM = 1.39–1.40 Ga) suggest a mantle source with addition of old crustal materials. Their high Rb/Y and Ba/La, low Nb/Y and Th/Yb ratios elucidate that the magma sources were probably metasomatized by slab-derived fluids. Besides, the high Th and low Ce/Th and Ba/Th ratios of the andesites suggest a contribution from subducted sediment–derived melts. Integrated with the depletion in high field strength elements and enrichment in light rare earth elements (LREEs), we suggest that the Yamansu andesites were formed by partial melting of relatively enriched mantle wedge metasomatized by both subducted sediment-derived melts and fluids. The basalts of the Tugutublak Formation (TF) have high MgO, Mg# (56–58) and εNd(t) (+5.9 ~ +6.3) values with enriched in LREEs and depleted in Nb–Ta–Ti anomalies, implying an arc setting. Their high Ba/Th, Ba/La and low Th/Ta, Th/Yb ratios suggest that the slab-derived fluids were involved. The basaltic andesites of the TF have higher SiO2, lower Mg# (48–50), Cr, Ni and εNd(t) (+1.21) values than the basalts of this formation, indicating that they were evolved from the basaltic magma. Therefore, the Carboniferous volcanic rocks in this study indicate that the Aqishan–Yamansu Belt was in a subduction background. The granites intruding into the TF show typical characteristics of I-type granite. Their highly positive εHf(t) values (+14 ~ +17) suggest a significant contribution from juvenile basaltic lower crust. Moreover, changes in the Dy/Yb and Ho/Yb ratios of Late Paleozoic felsic igneous rocks in the Aqishan–Yamansu Belt imply that the crust underwent four periods of thickening and thinning, which were likely triggered by the variation of subduction angles.
Προτιμήσεις των μεταπτυχιακών φοιτητών ΑΠΘ κατά την αναζήτηση πληροφοριών: σύγκριση μεταξύ φοιτητών προερχόμενων από διαφορετικά επιστημονικά πεδία
Creators: name: Αλεξανδρίδου, Σοφία Πασχάλη
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: συμπεριφορά πληροφοριακής αναζήτησης
μεταπτυχιακοί φοιτητές
information seeking behavior
postgraduate students

description: Σκοπός της παρούσας έρευνας ήταν η μελέτη της συμπεριφοράς των μεταπτυχιακών φοιτητών κατά τη διάρκεια της πληροφοριακής αναζήτησης και συγκεκριμένα η μελέτη του ρόλου που πιθανόν διαδραματίζει η επιστημονική τους εξειδίκευση στην εν λόγω συμπεριφορά. Για το σκοπό αυτό συντάχθηκε διαδικτυακό ερωτηματολόγιο και στάλθηκε πρόσκληση συμμετοχής στο σύνολο των μεταπτυχιακών φοιτητών του ΑΠΘ. Συνολικά 289 πλήρη ερωτηματολόγια συλλέχθηκαν και αναλύθηκαν. Τα αποτελέσματα καταδεικνύουν τη σαφή προτίμηση των συμμετεχόντων στο Google / Google Scholar ως πρώτη τους επιλογή, καθώς επίσης και τη γενικότερη προτίμηση στις ηλεκτρονικές πηγές αναζήτησης. Η ευχρηστία, η ευκολία πρόσβασης και η εξοικείωση είναι οι λόγοι που προτάχθηκαν για αυτή την επιλογή. Η διαφοροποίηση μεταξύ των φοιτητών διαφορετικών επιστημονικών πεδίων εντοπίζεται στη δεύτερή τους επιλογή. Οι φοιτητές των θετικών / εφαρμοσμένων επιστημών προσπαθώντας να ανταποκριθούν στην ανάγκη τους για επίκαιρη και έγκυρη πληροφόρηση απευθύνονται σε εξειδικευμένες ηλεκτρονικές πληροφοριακές πηγές, ενώ οι φοιτητές των ανθρωπιστικών / κοινωνικών επιστημών στρέφονται στον κατάλογο της βιβλιοθήκης
description: The aim of this study was to study the information seeking behavior of postgraduate students and more specifically, to define the possible influence of their scientific expertise on that behavior. An online questionnaire was created for this purpose and an invitation to participate was sent to all the postgraduate students of the Aristotle University of Thessaloniki. 289 questionnaires were collected and analyzed. The results showed that the students choοse Google / Google Scholar as their first resource preference and as a start point for their research. It is also important to mention their preference for electronic resources and not for the traditional printed ones. Usefulness, ease of access and familiarization with the resource were reported as the main reasons for their choice. Differentiation among students of different scientific fields is identified in their second choice. Applied Sciences and Science students, as they have to stay up to date with the evolution in their scientific field, prefer specialized electronic resources, in contrast to Humanities and Social sciences students who prefer library’s catalog