cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Finite non-metabelian Schur sigma-Galois groups of class field towers
Creators: name: Mayer, Daniel C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Number Theory (math.NT)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20D15, 20E18, 20E22, 20F05, 20F12, 20F14, 20-04, 11R37, 11R29, 11R11, 11R20

description: For each odd prime p>=5, there exist finite p-groups G with derived quotient G/D(G)=C(p)xC(p) and nearly constant transfer kernel type k(G)=(1,2,...,2) having two fixed points. It is proved that, for p=7, this type k(G) with the simplest possible case of logarithmic abelian quotient invariants t(G)=(11111,111,21,21,21,21,21,21) of the eight maximal subgroups is realized by exactly 98 non-metabelian Schur sigma-groups S of order 7^11 with fixed derived length dl(S)=3 and metabelianizations S/D(D(S)) of order 7^7. For p=5, the type k(G) with t(G)=(2111,111,21,21,21,21) leads to infinitely many non-metabelian Schur sigma-groups S of order at least 5^14 with unbounded derived length dl(S)>=3 and metabelianizations S/D(D(S)) of fixed order 5^7. These results admit the conclusion that d=-159592 is the first known discriminant of an imaginary quadratic field with 7-class field tower of precise length L=3, and d=-90868 is a discriminant of an imaginary quadratic field with 5-class field tower of length L>=3, whose exact length remains unknown.
description: 13 pages, 3 figures, 5 tables
Nonclassical oscillations in pre- and post-selected quantum walks
Creators: name: Chen, Xiaoxiao
name: Meng, Zhe
name: Li, Jian
name: Yang, Jiazhi
name: Zhang, Anning
name: Kopyciuk, Tomasz
name: Kurzynski, Pawel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum walks are counterparts of classical random walks. They spread faster, which can be exploited in information processing tasks, and constitute a versatile simulation platform for many quantum systems. Yet, some of their properties can be emulated with classical light. This rises a question: which aspects of the model are truly nonclassical? We address it by carrying out a photonic experiment based on a pre- and post-selection paradox. The paradox implies that if somebody could choose to ask, either if the particle is at position x = 0 at even time steps, or at position x = d (d > 1) at odd time steps, the answer would be positive, no matter the question asked. Therefore, the particle seems to undergo long distance oscillations despite the fact that the model allows to jump one position at a time. We translate this paradox into a Bell-like inequality and experimentally confirm its violation up to eight standard deviations.
description: 7 pages, 6 figures
Μοντελοποίηση και προσομοίωση χρονοδρομολόγησης εργασιών σε πολλαπλά sites στο Grid
Creators: name: Ζήκος, Στυλιανός Αριστοτέλης
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Μοντελοποίηση και προσομοίωση
Προσομοίωση διακεκριμένων γεγονότων
Χρονοδρομολόγηση εργασιών
Πολιτικές δρομολόγησης
Συστήματα πλέγματος (grids)
Modeling and simulation
Discrete-event simulation
Job scheduling policies
Sites
Grid system
Grid scheduler

description: Σε αυτή την εργασία μελετάται ένα σύστημα grid που αποτελείται από τον Grid Scheduler και τέσσερα sites που επικοινωνούν με αυτόν. Εξετάζονται δύο διαφορετικές πολιτικές δρομολόγησης εργασιών από τον Grid Scheduler στα sites, η τυχαία πολιτική (Random) και η αναβαλλόμενη πολιτική (Deferred). Επίσης εξετάζονται τρεις διαφορετικές πολιτικές ανάθεσης εργασιών στους επεξεργαστές τοπικά στα sites. Οι πολιτικές αυτές είναι η Random, η Shortest Queue και η 2 Random Shortest Queue. Εφαρμόζονται όλοι οι δυνατοί συνδυασμοί των παραπάνω πολιτικών για να μελετηθεί η επίδρασή τους στην απόδοση του συστήματος. Ο στόχος είναι η όσο το δυνατόν καλύτερη εξισορρόπηση φόρτου μεταξύ των sites αλλά και μεταξύ των επεξεργαστών σε κάθε site και η ελάττωση του μέσου χρόνου απόκρισης των εργασιών.
description: This work studies a grid system which consists of a Grid Scheduler and four sites that communicate with it. Two different job scheduling policies from the Grid Scheduler to sites are examined, the Random policy and the Deferred policy. Three different local job allocation policies to processors inside sites are also examined. These are the Random, the Shortest Queue and the 2 Random Shortest Queue policies. All possible different combinations of the above policies are applied to study the effects on system's performance. The objectives are to balance the workload among the sites and among the processors in each site, and to minimize the job's mean response time in system.
The Spiderweb galaxy: a forming massive cluster galaxy at z~2
Creators: name: Miley, G. K.
name: Overzier, R. A.
name: Zirm, A. W.
name: Ford, H. C.
name: Kurk, J. D.
name: Pentericci, L.
name: Blakeslee, J. P.
name: Franx, M.
name: Illingworth, G. D.
name: Postman, M.
name: Rosati, P.
name: Rottgering, H. J. A.
name: Venemans, B. P.
name: Helder, E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a deep image of the radio galaxy MRC 1138-262 taken with the Hubble Space Telescope (HST) at a redshift of z = 2.2. The galaxy is known to have properties of a cD galaxy progenitor and be surrounded by a 3 Mpc-sized structure, identified with a protocluster. The morphology shown on the new deep HST/ACS image is reminiscent of a spider's web. More than 10 individual clumpy features are observed, apparently star-forming satellite galaxies in the process of merging with the progenitor of a dominant cluster galaxy 11 Gyr ago. There is an extended emission component, implying that star formation was occurring over a 50 times 40 kpc region at a rate of more than 100 M_sun/yr. A striking feature of the newly named ``Spiderweb galaxy'' is the presence of several faint linear galaxies within the merging structure. The dense environments and fast galaxy motions at the centres of protoclusters may stimulate the formation of these structures, which dominate the faint resolved galaxy populations in the Hubble Ultra Deep Field. The new image provides a unique testbed for simulations of forming dominant cluster galaxies.
description: 5 pages, 2 figures (reduced to grayscale); ApJ Letters
Η υπέρβαση των χρονικών ορίων εργασίας
Creators: name: Αρβανιτίδου, Ανδρομάχη Χριστόδουλου
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Χρόνος εργασίας
Παραδοσιακό σύστημα οργάνωσης χρόνου εργασίας
Ευέλικτο σύστημα οργάνωσης χρόνου εργασίας
Υπερωρία
Απλή υπερεργασία
θεσμοθετημένη υπερεργασία
Working time
Traditional ystem of organizing working time
Flexible system of organizing working time
Overtime
Overwork

description: Χρόνος εργασίας είναι ο χρόνος κατά τον οποίο ο εργαζόμενος δικαιούται και υποχρεούται να προσφέρει την εργασία του στον εργοδότη. Ο χρόνος εργασίας ρυθμίζεται με νόμο, συλλογικές συμβάσεις, διαιτητικές απόφασης, κανονισμούς από την επιχειρησιακή συνήθεια και πρακτική. Απλή υπερεργασία είναι η απασχόληση του εργαζόμενου καθ'υπέρβαση του νόμιμου εβδομαδιαίου χρόνου εργασίας επαγγελματικής προέλευσης συμφωνηθέντος ατομικού χρόνου εργασίας και μέχρι 40 ώρες.Υπερεργασία θεσμοθετημένη είναι η υπέρβαση του ανώτατου επιτρεπτού νόμιμου χρόνου εργασίας επαγγελματικής προέλευσης και μέχρι τη συμπλήρωση του ανώτατου εβδομαδιαίου νόμιμου χρόνου εργασίας. Υπερωρία είναι η υπέρβαση του ανώτατου επιτρεπτού για κάθε εργαζόμενου ημερήσιου χρόνου εργασίας. Για την πρόσθετη αυτή εργασία οφείλεται και πρόσθετη αμοιβή. Η υπέρβαση των χρονικών ορίων εργασίας ρυθμίζεται σήμερα στο νόμο 3385/2005. Σε αυτόν ρυθμίζονται και τα ευέλικτα συστήματα του χρόνου εργασίας
description: The time period of work is the number of hours during which the employee is really occupied in a day, in the place of work for the purpose of work.The time period of work is arranged by law, by collective contract a works rule or an individual private contract always within the provisions of law. Overwork is any work done over the reduced limit set by private labour contract or works rule overtime is the work done over the limits of daily work set by law. For every hour of overwork and overtime a compersation proportionate to the salary must be given to the employee. Today overtime and overwork is defined by pct 3385/2005. The same act defines the flexible system of organizing working time
Numerical studies towards practical large-eddy simulation
Creators: name: Boudet, Jérôme
name: Caro, Joëlle
name: Shao, L.
name: Lévêque, Emmanuel
Publisher: name: arXiv
Year: 2008
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Large-eddy simulation developments and validations are presented for an improved simulation of turbulent internal flows. Numerical methods are proposed according to two competing criteria: numerical qualities (precision and spectral characteristics), and adaptability to complex configurations. First, methods are tested on academic test-cases, in order to abridge with fundamental studies. Consistent results are obtained using adaptable finite volume method, with higher order advection fluxes, implicit grid filtering and "low-cost" shear-improved Smagorinsky model. This analysis particularly focuses on mean flow, fluctuations, two-point correlations and spectra. Moreover, it is shown that exponential averaging is a promising tool for LES implementation in complex geometry with deterministic unsteadiness. Finally, adaptability of the method is demonstrated by application to a configuration representative of blade-tip clearance flow in a turbomachine.
Θερμική αποσταθεροποίηση γαλακτωμάτων που παρασκευάζονται με χρήση κρόκου του αυγού και επίδραση του τασενεργού tween 40
Creators: name: Νικηφορίδης, Κων/νος Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Κρόκος αυγού
Γαλακτώματα
Προσρόφηση πρωτεΐνης
Tween
Egg yolk
Emulsions
Protein adsorption

description: Μελετήθηκε ο μηχανισμός της θερμικής αποσταθεροποίησης γαλακτωμάτων που παρασκευάζονται με τη βοήθεια κρόκου αυγού. Επίσης, διερευνήθηκε η δυνατότητα παρεμπόδισης της θερμικής αποσταθεροποίησης των γαλακτωμάτων αυτών με την προσθήκη του τασενεργού Tween 40. Για το σκοπό αυτό παρασκευάσθηκαν γαλακτώματα τα οποία θερμάνθηκαν προκειμένου να μελετηθεί η μεταβολή του μέσου μεγέθους των σταγονιδίων και να παρατηρηθούν στο μικροσκόπιο.Διαπιστώθηκε ότι η θέρμανση του γαλακτώματος σε θερμοκρασίες υψηλότερες από 80-85οC προκάλεσε αποσταθεροποίηση του συστήματος, δηλαδή αύξηση του μέσου μεγέθους των σταγονιδίων, που ήταν το αποτέλεσμα της ταυτόχρονης συσσωμάτωσης και συγχώνευσης των σταγονιδίων. Διαπιστώθηκε επίσης ότι σημαντική επίδραση στη θερμική αποσταθεροποίηση των γαλακτωμάτων είχαν οι μη προσροφημένες στην επιφάνεια των σταγονιδίων πρωτεΐνες που είχαν παραμείνει στη συνεχή φάση, Παρατηρήθηκε, επίσης, ότι η προσθήκη του τασενεργού είχε ως αποτέλεσμα την προστασία των γαλακτωμάτων κατά τη θερμική επεξεργασία αποτρέποντας τη συσσωμάτωση αλλά και τη συγχώνευση των σταγονιδίων τους.Τα αποτελέσματα αυτά βοήθησαν στην καλύτερη κατανόηση του μηχανισμού της θερμικής αποσταθεροποίησης των γαλακτωμάτων που παρασκευάζονται με τη βοήθεια κρόκου αυγού και στην αποσαφήνιση του ρόλου τόσο των πρωτεϊνικών μορίων που προσροφώνται στην επιφάνεια των σταγονιδίων όσο και αυτών που παραμένουν στη συνεχή φάση του συστήματος. Επίσης, προέκυψαν χρήσιμα συμπεράσματα σχετικά με την ανταγωνιστική προσρόφηση των μορίων του τασενεργού και της πρωτεΐνης του κρόκου αυγού στη διεπιφάνεια των σταγονιδίων και τη σημασία της στην σταθεροποίηση των γαλακτωμάτων κατά τη θέρμανση.
description: The process of heat-induced destabilization of yolk-based emulsions and the role of Tween addition in inhibiting droplet aggregation/colaescence in the thermally treated emulsions were investigated in an attempt to understand the mechanism behind yolk emulsion destabilizaiton during the application of processes such as pasteurization/sterilization and/or cooking.Data on emulsion particle size distribution were combined with results on yolk protein adsorption to clarify the role of the unadsorbed yolk protein fraction in the destabilization of the thermally treated emulsion while surface tension measurements were conducted to investigate yolk protein-tween interactions at the air/water interface and their effect on emulsion stability
Two-Dimensional Order and Disorder Thermofields
Creators: name: Belvedere, L. V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The main objective of this paper was to obtain the two-dimensional order and disorder thermal operators using the Thermofield Bosonization formalism. We show that the general property of the two-dimensional world according with the bosonized Fermi field at zero temperature can be constructed as a product of an order and a disorder variables which satisfy a dual field algebra holds at finite temperature. The general correlation functions of the order and disorder thermofields are obtained.
description: 4 pages
Μελέτη της βιοδιεργασίας παραγωγής λυκοπενίου με το μύκητα Blakeslea Trispora. Εναλλακτική προσέγγιση επιλογής αναστολέα της β-κυκλάσης του λυκοπενίου
Creators: name: Πεγκλίδου, Κυριακή Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Βιοδιεργασία
Λυκοπένιο
Αναστολέας
Β-κυκλάση
Γλυκίνη
Μύκητας
Food-grade
Bioprocess
Inhibitor
lycopene b-cyclase
Glycine
Blakeslea trispora

description: Τις τελευταίες δεκαετίες έντονη ερευνητική δραστηριότητα έχει παραιτηθεί στους κόλπους της επιστημονικής κοινότητας για τη βιοτεχνολογική παραγωγή καροτενοειδών.Στα πλαίσια της παρουσίας μεταπτυχιακής εργασίας η έρευνα εστιάσθηκε στη βιοτεχνολογική παραγωγή, από το μύκητα Blakeslea Trispora, λυκοπένιου. Εγιναν προσπάθειες να κατανοηθεί ο μηχανισμός βιοσύνθεσης αυτού από το μύκητα και να δημιουργηθεί τεχνογνωσία για τη βιοτεχνολογική παραγωγή του.Σημαντική επίσης, προσπάθεια έγινε στην κατεύθυνση επιλογής ενός food grade αναστολέα της β-κυκλάσης του λυκοπενίου, παρεμποδίζοντας με τον τρόπο αυτό την κυκλοποίηση αυτούς σε γ και β καροτένιο. Για το σκοπό αυτό επιλέχθηκε το μόριο της γλυκίνης.
description: Lycopene from the fungus Blakeslea Trispora has been approved to be used as food colourant.The biosynthesis of this compound occurs during the process of sexual reproduction of the fungus. For lycopene production specific chemical inhibition of b-cyclase activity is required. Up to now, several chemical agents such as substituted amines and nitrogenous heterocyclic bases have been studied for their effect on the biosynthesis of b-carotene precursors. Most of these compounds are characterized as toxic or hazardous. In the course of testing carotenogenesis regulation, we employed glycine as a simple food-grade amino acid with a basic amino group in its molecule
Searching for signatures of chaos in gamma-ray light curves of selected Fermi-LAT blazars
Creators: name: Ostapenko, O.
name: Tarnopolski, M.
name: Żywucka, N.
name: Pascual-Granado, J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Blazar variability appears to be stochastic in nature. However, a possibility of low-dimensional chaos was considered in the past, but with no unambiguous detection so far. If present, it would constrain the emission mechanism by suggesting an underlying dynamical system. We rigorously searched for signatures of chaos in Fermi-Large Area Telescope light curves of 11 blazars. The data were comprehensively investigated using the methods of nonlinear time series analysis: phase-space reconstruction, fractal dimension, maximal Lyapunov exponent (mLE). We tested several possible parameters affecting the outcomes, in particular the mLE, in order to verify the spuriousness of the outcomes. We found no signs of chaos in any of the analyzed blazars. Blazar variability is either truly stochastic in nature, or governed by high-dimensional chaos that can often resemble randomness.
description: Pages : 7, figures: 5, accepted in MNRAS
X-ray pushing of a mechanical microswing
Creators: name: Siria, A.
name: Rodrigues, M. S.
name: Dhez, O.
name: Schwartz, W.
name: Torricelli, G.
name: Denmat, S. Le
name: Rochat, N.
name: Auvert, G.
name: Bikondoa, O.
name: Metzger, T. H.
name: Wermeille, D.
name: Felici, R.
name: Comin, F.
name: Chevrier, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Nanoelectromechanical Systems (NEMS) are among the best candidates to measure interactions at nanoscale [1-6], especially when resonating oscillators are used with high quality factor [7, 8]. Despite many efforts [9, 10], efficient and easy actuation in NEMS remains an issue [11]. The mechanism that we propose, thermally mediated Center Of Mass (COM) displacements, represents a new actuation scheme for NEMS and MEMS. To demonstrate this scheme efficiency we show how mechanical nanodis- placements of a MEMS is triggered using modulated X-ray microbeams. The MEMS is a microswing constituted by a Ge microcrystal attached to a Si microcantilever. The interaction is mediated by the Ge absorption of the intensity modulated X-ray microbeam impinging on the microcrystal. The small but finite thermal expansion of the Ge microcrystal is large enough to force a nanodisplacement of the Ge microcrystal COM glued on a Si microlever. The inverse mechanism can be envisaged: MEMS can be used to shape X-ray beams. A Si microlever can be a high frequency X-ray beam chopper for time studies in biology and chemistry.
description: 5 pages, 4 figure
How to deform an egg yolk? On the Study of Soft Matter Deformation in a Liquid Environment
Creators: name: Lang, Ji
name: Nathan, Rungun
name: Wu, Qianhong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: In this paper, we report a novel experimental and theoretical study to examine the response of a soft capsule bathed in a liquid environment to sudden external impacts. Taking an egg yolk as an example, we found that the soft matter is not sensitive to translational impacts, but is very sensitive to rotational, especially decelerating-rotational impacts, during which the centrifugal force and the shape of the membrane together play a critical role causing the deformation of the soft object. This finding, as the first study of its kind, reveals the fundamental physics behind the motion and deformation of a membrane-bound soft object, e.g., egg yolk, cells, soft brain matter, etc., in response to external impacts.
description: *To whom correspondence should be addressed: qianhong.wu@villanova.edu
Περιβάλλοντα υποστήριξης της επιχειρηματολογίας
Creators: name: Δελημπέη, Ελένη Αριστοτέλη
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Επιχειρηματολογία
Ασαφώς ορισμένα προβλήματα
Scripts
Ηλεκτορνικά περιβάλλοντα μάθησης
Argumentation
ill-defined problems
Computer supported collaborative learning environments

description: Η επιχειρηματολογία μπορεί να θεωρηθεί ως μια διαδικασία που έχει ως σκοπό τόσο την εκμάθηση επιχειρηματολογικών δεξιοτήτων στους συμμετέχοντες καθώς κατασκευάζουν επιχειρήματα σε ανάδραση με τους συνομιλητές τους (Kuhn, 1997), όσο και την απόκτηση γνώσεων σχετικά με το αντικείμενο προς συζήτηση (Weinberger & Fischer, 2006; Αndriessen, Baker & Suthers, 2003). Τα παραπάνω μπορούν να λάβουν χώρα όταν οι εκπαιδευόμενοι εμπλέκονται ενεργά σε συζητήσεις, όπου «ασαφώς ορισμένα» (ill-defined) προβλήματα θέτονται προς συζήτηση-επίλυση, και μοιράζονται έναν κοινό στόχο που είναι η εύρεση μιας κοινά αποδεκτής λύσης.Στη συγκεκριμένη εργασία, αρχικά, γίνεται μια προσπάθεια συνοπτικής παρουσίασης των θεωριώνμάθησης που δικαιολογούν τα θετικά μαθησιακά αποτελέσματα που μπορούν να προκύψουν από τηνεπιχειρηματολογία. Στη συνέχεια παρουσιάζονται η δομή του επιχειρήματος και της επιχειρηματολογίαςκαι αναπαρίστανται με τη μορφή οντολογίας. Έπειτα παραθέτονται μια σειρά ηλεκτρονικώνπεριβαλλόντων επιχειρηματολογίας και καταγράφεται η τυπολογία των περιβαλλόντων αυτών,σχολιάζοντας ελλείψεις ή επιπλέον στοιχεία σε σχέση με την οντολογία που παρουσιάστηκε. Τέλος,γίνεται μια πρόταση σχεδίασης ενός πρωτότυπου ηλεκτρονικού περιβάλλοντος επιχειρηματολογίας πουθεωρείται πως ενσωματώνει τόσο τα θετικά στοιχεία των υπολοίπων περιβαλλόντων όσο και στοιχείαπου αναφέρθηκαν στην οντολογία αλλά δεν υλοποιήθηκαν από τα προαναφερθέντα περιβάλλοντα.
description: Argumentation can be considered as a process that aims in acquiring armentative skills (Kuhn, 1997) as well as domain specific knowledge. (Weinberger & Fischer, 2006; Andriessen, Baker & Suthers, 2003). The aforementioned can happen when they share a common goal, which is the solution of the problem. In this project, initially, it is made an effort to present all these theoretical principles, which may justify the positive outcomes of argumentative knowledge construction. Then, the structure of an argument and the structure of argumentation are presented and an ontology is constructed. Apart from that some electronic argumentation supported environments are examined and, lastly, a design of a new environment is made, which incorporates the positive elements of the aforementioned environments and leaves out the negative.
Learning Synthetic Environments for Reinforcement Learning with Evolution Strategies
Creators: name: Ferreira, Fabio
name: Nierhoff, Thomas
name: Hutter, Frank
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: This work explores learning agent-agnostic synthetic environments (SEs) for Reinforcement Learning. SEs act as a proxy for target environments and allow agents to be trained more efficiently than when directly trained on the target environment. We formulate this as a bi-level optimization problem and represent an SE as a neural network. By using Natural Evolution Strategies and a population of SE parameter vectors, we train agents in the inner loop on evolving SEs while in the outer loop we use the performance on the target task as a score for meta-updating the SE population. We show empirically that our method is capable of learning SEs for two discrete-action-space tasks (CartPole-v0 and Acrobot-v1) that allow us to train agents more robustly and with up to 60% fewer steps. Not only do we show in experiments with 4000 evaluations that the SEs are robust against hyperparameter changes such as the learning rate, batch sizes and network sizes, we also show that SEs trained with DDQN agents transfer in limited ways to a discrete-action-space version of TD3 and very well to Dueling DDQN.
EPIC 216747137: a new HW Vir eclipsing binary with a massive sdOB primary and a low-mass M-dwarf companion
Creators: name: Silvotti, R.
name: Schaffenroth, V.
name: Heber, U.
name: Østensen, R. H.
name: Telting, J. H.
name: Vos, J.
name: Kilkenny, D.
name: Mancini, L.
name: Ciceri, S.
name: Irrgang, A.
name: Drechsel, H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: EPIC 216747137 is a new HW~Virginis system discovered by the Kepler spacecraft during its K2 "second life". Like the other HW Vir systems, EPIC 216747137 is a post-common-envelope eclipsing binary consisting of a hot subluminous star and a cool low-mass companion. The short orbital period of 3.87 hours produces a strong reflection effect from the secondary (~9% in the R band). Together with AA Dor and V1828 Aql, EPIC 216747137 belongs to a small subgroup of HW Vir systems with a hot evolved sdOB primary. We find the following atmospheric parameters for the hot component: Teff=40400$\pm$1000 K, logg=5.56$\pm$0.06, log(N(He)/N(H))=$-$2.59$\pm$0.05. The sdOB rotational velocity vsini=51$\pm$10 km/s implies that the stellar rotation is slower than the orbital revolution and the system is not synchronized. When we combine photometric and spectroscopic results with the Gaia parallax, the best solution for the system corresponds to a primary with a mass of about 0.62 Msun close to, and likely beyond, the central helium exhaustion, while the cool M-dwarf companion has a mass of about 0.11 Msun.
description: 16 pages, 16 figures, MNRAS, accepted for publication
Witnessing the formation of a brightest cluster galaxy at z>2
Creators: name: Overzier, Roderik A.
name: Miley, George K.
name: Ford, Holland C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present deep observations taken with the HST Advanced Camera for Surveys of the central massive galaxy in a forming cluster at z=2.2. The galaxy hosting the powerful radio source MRC 1138-262 is associated with one of the most extensive merger systems known in the early universe. Our HST/ACS image shows many star-forming galaxies merging within a ~200 kpc region that emits both diffuse line emission and continuum in the rest-frame UV. Because this galaxy lives in an overdense environment, it represents a rare view of a brightest cluster galaxy in formation at z>2 which may serve as a testbed for predictions of massive cluster galaxy formation.
description: Contribution to the proceedings of "The Fate of Gas in Galaxies", Dwingeloo, July 2006, with 2 colour figures. To appear in New Astronomy Reviews, Vol. 51 (2007), eds. Morganti, Oosterloo, Villar-Martin & van Gorkom
Additional file 1 of Evaluating level of adherence to nicotine replacement therapy and its impact on smoking cessation: a systematic review and meta-analysis
Creators: name: Mersha, Amanual Getnet
name: Parivash Eftekhari
name: Bovill, Michelle
name: Tollosa, Daniel Nigusse
name: Gould, Gillian Sandra
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1: Draft Medline search – Ovid interface.
Conjectures and Open Questions on the Structure and Regularity of Spaces with Lower Ricci Curvature Bounds
Creators: name: Naber, Aaron
Publisher: name: arXiv
Year: 2020
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: In this short note we review some known results on the structure and regularity of spaces with lower Ricci curvature bounds. We present some known and new open questions about next steps.
description: v2: Corollary 2.20 corrected
A comparison theorem for cosmological lightcones
Creators: name: Carfora, Mauro
name: Familiari, Francesca
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Let $(M, g)$ denote a cosmological spacetime describing the evolution of a universe which is isotropic and homogeneous on large scales, but highly inhomogeneous on smaller scales. We consider two past lightcones, the first, $\mathcal{C}^-_L(p, g)$, is associated with the physical observer $p\in\,M$ who describes the actual physical spacetime geometry of $(M, g)$ at the length scale $L$, whereas the second, $\mathcal{C}^-_L(p, \hat{g})$, is associated with an idealized version of the observer $p$ who, notwithstanding the presence of local inhomogeneities at the given scale $L$, wish to model $(M, g)$ with a member $(M, \hat{g})$ of the family of Friedmann-Lemaitre-Robertson-Walker spacetimes. In such a framework, we discuss a number of mathematical results that allows a rigorous comparison between the two lightcones $\mathcal{C}^-_L(p, g)$ and $\mathcal{C}^-_L(p, \hat{g})$. In particular, we introduce a scale dependent ($L$) lightcone-comparison functional, defined by a harmonic type energy, associated with a natural map between the physical $\mathcal{C}^-_L(p, g)$ and the FLRW reference lightcone $\mathcal{C}^-_L(p, \hat{g})$. This functional has a number of remarkable properties, in particular it vanishes iff, at the given length-scale, the corresponding lightcone surface sections (the celestial spheres) are isometric. We discuss in detail its variational analysis and prove the existence of a minimum that characterizes a natural scale-dependent distance functional between the two lightcones. We also indicate how it is possible to extend our results to the case when caustics develop on the physical past lightcone $\mathcal{C}^-_L(p, g)$. Finally, we show how the distance functional is related to spacetime scalar curvature in the causal past of the two lightcones, and briefly illustrate a number of its possible applications.
description: 19 pages; A few notational quirks and typos corrected
A promising approach for the real-time quantification of cytosolic protein-protein interactions in living cells
Creators: name: Incaviglia, Ilaria
name: Frutiger, Andreas
name: Blickenstorfer, Yves
name: Treindl, Fridolin
name: Ammirati, Giulia
name: Lüchtefeld, Ines
name: Dreier, Birgit
name: Plückthun, Andreas
name: Vörös, Janos
name: Reichmuth, Andreas M
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: Subcellular Processes (q-bio.SC)
subject: FOS: Biological sciences

description: In recent years, cell-based assays have been frequently used in molecular interaction analysis. Cell-based assays complement traditional biochemical and biophysical methods, as they allow for molecular interaction analysis, mode of action studies and even drug screening processes to be performed under physiologically relevant conditions. In most cellular assays, biomolecules are usually labeled to achieve specificity. In order to overcome some of the drawbacks associated with label-based assays, we have recently introduced cell-based molography as a biosensor for the analysis of specific molecular interactions involving native membrane receptors in living cells. Here, we expand this assay to cytosolic protein-protein interactions. First, we created a biomimetic membrane receptor by tethering one cytosolic interaction partner to the plasma membrane. The artificial construct is then coherently arranged into a two-dimensional pattern within the cytosol of living cells. Thanks to the molographic sensor, the specific interactions between the coherently arranged protein and its endogenous interaction partners become visible in real-time without the use of a fluorescent label. This method turns out to be an important extension of cell-based molography because it expands the range of interactions that can be analyzed by molography to those in the cytosol of living cells.
description: 22 pages, 4 figures
Additional file 2 of Evaluating level of adherence to nicotine replacement therapy and its impact on smoking cessation: a systematic review and meta-analysis
Creators: name: Mersha, Amanual Getnet
name: Parivash Eftekhari
name: Bovill, Michelle
name: Tollosa, Daniel Nigusse
name: Gould, Gillian Sandra
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 2: Quality Assessment Tool for observational studies.
Deformed two-dimensional rogue waves in the (2+1)-dimensional Korteweg-de Vries equation
Creators: name: Cao, Yulei
name: Hu, Peng-Yan
name: Cheng, Yi
name: He, Jingsong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: Within the (2 + 1)-dimensional Korteweg-de Vries equation framework, new bilinear Backlund transformation and Lax pair are presented based on the binary Bell polynomials and gauge transformation. By introducing an arbitrary function, a family of deformed soliton and deformed breather solutions are presented with the improved Hirotas bilinear method. Choosing the appropriate parameters, their interesting dynamic behaviors are shown in three-dimensional plots. Furthermore, novel rational solutions are generated by taking the limit of obtained solitons. Additionally, two dimensional [2D] rogue waves (localized in both space and time) on the soliton plane are presented, we refer to it as deformed 2D rogue waves. The obtained deformed 2D rogue waves can be viewed as a 2D analog of the Peregrine soliton on soliton plane, and its evolution process is analyzed in detail. The deformed 2D rogue wave solutions are constructed successfully, which are closely related to the arbitrary function. This new idea is also applicable to other nonlinear systems.
description: "Chinese Physics B, in press"
Modeling compact binary signals and instrumental glitches in gravitational wave data
Creators: name: Chatziioannou, Katerina
name: Cornish, Neil
name: Wijngaarden, Marcella
name: Littenberg, Tyson B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Transient non-gaussian noise in gravitational wave detectors, commonly referred to as glitches, pose challenges for inference of the astrophysical properties of detected signals when the two are coincident in time. Current analyses aim towards modeling and subtracting the glitches from the data using a flexible, morphology-independent model in terms of sine-gaussian wavelets before the signal source properties are inferred using templates for the compact binary signal. We present a new analysis of gravitational wave data that contain both a signal and glitches by simultaneously modeling the compact binary signal in terms of templates and the instrumental glitches using sine-gaussian wavelets. The model for the glitches is generic and can thus be applied to a wide range of glitch morphologies without any special tuning. The simultaneous modeling of the astrophysical signal with templates allows us to efficiently separate the signal from the glitches, as we demonstrate using simulated signals injected around real O2 glitches in the two LIGO detectors. We show that our new proposed analysis can separate overlapping glitches and signals, estimate the compact binary parameters, and provide ready-to-use glitch-subtracted data for downstream inference analyses.
description: 9 pages, 15 figures, published version
Mito sobre el pajarito Oshecllell
Creators: name: Ortiz Potesta, Pedro
name: Santos Granero, Fernando
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: ame

description: Acusó a los humanos de despilfarradores ante la divinidad solar Yompor Ror. Transcrito, traducido, mecanografiado y digitalizado.
Wenz, Gunther: Theologie der Bekenntnisschriften der evangelisch-lutherischen Kirche
Creators: name: Gassmann, Günther
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 46 Nr. 3 (1997): Ökumenische Rundschau, Band 46, Heft 3
Trait and self-presentation dimensions of perfectionism among women with anorexia nervosa
Creators: name: Cockell, Sarah Jane
Publisher: name: University of British Columbia
Year: 2009

description: The purpose of this study was twofold: first to examine trait and self-presentation dimensions of perfectionism among women with anorexia nervosa compared to psychiatric and normal control women; and second, to explore the relationship between perfectionism dimensions and anorexic symptomatology. Twenty-one women meeting operationalized DSM-IV criteria for anorexia nervosa were recruited for the study. They were compared with 21 psychiatric and normal control women who were matched as closely as possible to the anorexic group on age and education. Self-report and interview measures of trait and self-presentation dimensions of perfectionism were administered along with measures of anorexic symptomatology, depression, self-esteem, and psychiatric disturbance. It was found that women with anorexia nervosa endorsed significantly higher levels of trait and self-presentation dimensions of perfectionism, compared to both control groups. Self-Oriented and Socially-Prescribed Perfectionism, as well as the Nondisclosure of Imperfection, were significantly higher in women with anorexia nervosa than women in the psychiatric and normal control groups, even after controlling for depression, self-esteem, and severity of psychiatric disturbance. In addition, different dimensions of perfectionism were associated with anorexic symptom severity. The results suggest that various dimensions of trait and self-presentation perfectionism may play an important role in anorexia nervosa. Theoretical and clinical implications with regard to the role of these dimensions of perfectionism in the etiology and treatment of anorexia nervosa are discussed.
III-Nitride nanophotonics for beyond-octave soliton generation and self-referencing
Creators: name: Liu, Xianwen
name: Gong, Zheng
name: Bruch, Alexander W.
name: Surya, Joshua B.
name: Lu, Juanjuan
name: Tang, Hong X.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Frequency microcombs, successors to mode-locked laser and fiber combs, enable miniature rulers of light for applications including precision metrology, molecular fingerprinting, and exoplanet discoveries. To enable the frequency ruling function, microcombs must be stabilized by locking their carrier-envelop offset frequency. So far, the microcomb stabilization remains compounded by the elaborate optics external to the chip, thus evading its scaling benefit. To address this challenge, here we demonstrate a nanophotonic chip solution based on aluminum nitride thin films, which simultaneously offer optical Kerr nonlinearity for generating octave soliton combs and Pockels nonlinearity for enabling heterodyne detection of the offset frequency. The agile dispersion control of crystalline III-Nitride photonics permits high-fidelity generation of solitons with features including 1.5-octave comb span, dual dispersive waves, and sub-terahertz repetition rates down to 220 gigahertz. These attractive characteristics, aided by on-chip phase-matched aluminum nitride waveguides, allow the full determination of the offset frequency. Our proof-of-principle demonstration represents an important milestone towards fully-integrated self-locked microcombs for portable optical atomic clocks and frequency synthesizers.
description: 17 pages, 11 figures
Absolutely summing linear operators into spaces with no finite cotype
Creators: name: Botelho, Geraldo
name: Pellegrino, Daniel
Publisher: name: arXiv
Year: 2008
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 47B10

description: Given an infinite-dimensional Banach space $X$ and a Banach space $Y$ with no finite cotype, we determine whether or not every continuous linear operator from $X$ to $Y$ is absolutely $(q;p)$-summing for almost all choices of $p$ and $q$, including the case $p=q$. If $X$ assumes its cotype, the problem is solved for all choices of $p$ and $q$. Applications to the theory of dominated multilinear mappings are also provided.
description: 7 pages
A New Beam Polarimeter at COSY to Search for Electric Dipole Moments of Charged Particles
Creators: name: Müller, F.
name: Javakhishvili, O.
name: Shergelashvili, D.
name: Keshelashvili, I.
name: Mchedlishvili, D.
name: Abusaif, F.
name: Aggarwal, A.
name: Barion, L.
name: Basile, S.
name: Böker, J.
name: Canale, N.
name: Ciullo, G.
name: Dymov, S.
name: Felden, O.
name: Gagoshidze, M.
name: Gebel, R.
name: Demary, N.
name: Grigoryev, K.
name: Grzonka, D.
name: Hahnraths, T.
name: Hejny, V.
name: Kacharava, A.
name: Kamerdzhiev, V.
name: Karanth, S.
name: Kulikov, A.
name: Lehrach, A.
name: Lenisa, P.
name: Lomidze, N.
name: Lorentz, B.
name: Macharashvili, G.
name: Magiera, A.
name: Metreveli, Z.
name: Nass, A.
name: Nikolaev, N. N.
name: Nioradze, M.
name: Pesce, A.
name: Poncza, V.
name: Prasuhn, D.
name: Pretz, J.
name: Rathmann, F.
name: Saleev, A.
name: Sefzick, T.
name: Senichev, Yu.
name: Shmakova, V.
name: Slim, J.
name: Soltner, H.
name: Stephenson, E.
name: Ströher, H.
name: Tabidze, M.
name: Tagliente, G.
name: Uzikov, Yu.
name: Valdau, Yu.
name: Wagner, T.
name: Wrońska, A.
name: Wüstner, P.
name: Żurek, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A calorimetric polarimeter based on inorganic LYSO scintillators is described. It has been designed for use in a storage ring to search for electric dipole moments (EDM) of charged particles such as the proton and deuteron. Its development and first use was on the Cooler Synchrotron (COSY) at the Forschungszentrum Jülich with 0.97 GeV/c polarized deuterons, a particle and energy suitable for an EDM search. The search requires a polarimeter with high efficiency, large analyzing power, and stable operating characteristics. With typical beam momenta of about 1 GeV/c, the scattering of protons or deuterons from a carbon target into forward angles becomes a nearly optimal choice of an analyzing reaction. The polarimeter described here consists of 52 LYSO detector modules, arranged in 4 symmetric blocks (up, down, left, right) for energy determination behind plastic scintillators for particle identification via energy loss. The commissioning results of the current setup demonstrate that the polarimeter is ready to be employed in a first direct search for an EDM on the deuteron, which is planned at COSY in the next two years.
Additional file 1 of d-Allulose 3-epimerase of Bacillus sp. origin manifests profuse heat‐stability and noteworthy potential of d-fructose epimerization
Creators: name: Patel, Satya Narayan
name: Kaushal, Girija
name: Singh, Sudhir P.
Publisher: name: figshare
Year: 2021
Subjects: subject: Biophysics
subject: Biochemistry
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Molecular Biology
subject: Neuroscience
subject: Biotechnology
subject: Evolutionary Biology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Hematology

description: Additional file 1: Figure S1. Identity (%) matrix of DaeB with the previously characterized ketose 3-epimerases. Figure S2. Conserved domain analysis in DaeB protein. Figure S3. Predicted secondary structure of DaeB protein sequence. The information has been collected by Phyre2 web-based service. Figure S4. (A) A predicted 3D homology model of DaeB. A total of 288 amino acid residues of DaeB were modelled at 100% confidence. (B) Superimposition of the homology model of DaeB over the tertiary structure of C. cellulolyticum H10 (RMSD value 0.0Å). Figure S5. Effect of temperature on the heat stability of DaeB at pH 8.0. Figure S6. Time-point conversion of D-allulose from D-fructose (100-700 g L−1) using DaeB enzyme. Figure S7. Homology model of DaeB showing acidic amino acid residues (Asp and Glu) on the surface of the protein. Table S1. Comparison of native molecular mass, kinetic parameters, and specific activity of DaeB and other ketose 3-epimerases. Table S2. The conserved active site amino acid residues in the ketose 3-epimerases for which protein structure has been determined, and the homologous residues identified in DaeB. Table S3. In silco determination of allergenicity in DaeB protein. Table S4. Total number of acidic amino acid residues (Asp+Glu), and acidic amino acid residues on the protein's surface of DAEases.
Hawking radiation in a $d$-dimensional static spherically-symmetric black Hole surrounded by quintessence
Creators: name: Chen, Songbai
name: Wang, Bin
name: Su, Rukeng
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present a solution of Einstein equations with quintessential matter surrounding a $d$-dimensional black hole, whose asymptotic structures are determined by the state of the quintessential matter. We examine the thermodynamics of this black hole and find that the mass of the black hole depends on the equation of state of the quintessence, while the first law is universal. Investigating the Hawking radiation in this black hole background, we observe that the Hawking radiation dominates on the brane in the low-energy regime. For different asymptotic structures caused by the equation of state of the quintessential matter surrounding the black hole, we learn that the influences by the state parameter of the quintessence on Hawking radiation are different.
description: 16 pages, Accepted for publication in Phys. Rev. D
Conductance Switching and Inhomogeneous Field Melting in the Charge Ordered Manganites
Creators: name: Mukherjee, Anamitra
name: Pradhan, Kalpataru
name: Majumdar, Pinaki
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The field induced switching of conductance in the charge ordered half-doped manganites is controlled by the combination of metastability, an inhomogeneous high field state, and cation disorder. We study this non-equilibrium problem via real space Monte Carlo on a disordered strong coupling model appropriate to the manganites. We reproduce the variation of the switching fields with the mean ionic radius r_A and cation disorder σ_A, and demonstrate how the experimental features arise from the proximity of several phases in the Landau free energy landscape. Our prediction for the field melted state is consistent with a growing body of experimental evidence.
description: 5 pages, pdflatex, 5 png figures To appear in Europhys. Lett
Production of $X(3872)$ at High Multiplicity
Creators: name: Braaten, Eric
name: He, Li-Ping
name: Ingles, Kevin
name: Jiang, Jun
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The dependence of the production of the $X(3872)$ meson on the hadron multiplicity in $pp$ collisions has been used as evidence against $X$ being a charm-meson molecule. The argument is based in part on the incorrect assumption that the cross section for the breakup of $X$ by scattering with comovers can be approximated by a geometric cross section inversely proportional to the binding energy of $X$. The breakup cross section should instead be approximated by the probability-weighted sum of the cross sections for the scattering of comoving pions from the charm-meson constituents of $X$, which is insensitive to the binding energy. A simple modification of the comover interaction model gives excellent fits to the data from the LHCb collaboration on the multiplicity dependence of the production of $X$ and $ψ(2S)$ using parameters compatible with $X$ being a loosely bound charm-meson molecule.
description: 6 pages, 3 figures