cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Effect of Cloud Based Learning Management System on The Learning Management System Implementation Process: Faculty and Student Perspectives
Creators: name: Ekuase-Anwansedo, Ajayi
name: Smith, Akai
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: The concept of E-learning in Universities has grown rapidly over the years to include not just only a learning management system but also tools initially not designed for learning such as Facebook and advanced learning tools, for example games, simulations and virtualization. As a result, Cloud-based LMS is being touted as the next evolution of the traditional LMS. It is hoped that Cloud based LMS will resolve some of the challenges associated with the traditional LMS implementation process. In a previous study, we reported that lack of involvement of faculty and students in the LMS implementation process results in the limited use of the LMS by faculty and students. The question then is, Will the cloud-based LMS resolve these issues? We conducted a review of literature and presented an overview of the traditional LMS, cloud computing and the cloudbased LMS and we described how the cloud computing LMS resolve issues raised by faculty and students. we find that even though, cloud-based LMS resolve most of the technical issues associated with the traditional LMS, some of the human issues were not resolved. We hope that this study draws attention to non-technical issues associated with the LMS implementation process.
Additional file 5 of Gastrointestinal symptoms of long COVID-19 related to the ectopic colonization of specific bacteria that move between the upper and lower alimentary tract and alterations in serum metabolites
Creators: name: Zhang, Deyu
name: Weng, Siyuan
name: Xia, Chuanchao
name: Ren, Yuqing
name: Liu, Zaoqu
name: Xu, Yudi
name: Yang, Xiaoli
name: Wu, Ruhao
name: Peng, Lisi
name: Sun, Liqi
name: Zhu, Jiaqi
name: Liang, Xuesong
name: Jia, Yin
name: Wang, Huaizhou
name: Chen, Qian
name: Liu, Dongtian
name: Chen, Yi
name: Guo, Honglei
name: Han, Xinwei
name: Jin, Zhendong
name: Chen, Cui
name: Yang, Xia
name: Li, Zhaoshen
name: Huang, Haojie
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Cancer
subject: Virology

description: Additional file 5: Table S3. Differential metabolites in serum between follow-up group and normal group.
Transitioning from Blackboard to Moodle amidst Natural Disaster: Faculty and Students Perceptions
Creators: name: Ekuase-Anwansedo, Ajayi
name: Noguera, Jose
name: Dumas, Brandon
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Higher educational institutions continuously look for ways to improve the quality of their eLearning services and adapt learning solutions to suit the needs of the institution. During the 2016 Fall Semester, a university located in the Southern part of United States decided to transition from the Blackboard learning management system (LMS) to the Moodle learning management system. Typically such a transition presents a huge challenge for the University staff, faculty, and students. Additionally, on August 2016, what CNN themedthe worst natural disaster, to strike the United States since Hurricane Sandy, occurred in Louisiana during the transition. This led to massive disruptions in activities throughout the state. This paper examines the perceptions of both faculty and student on the transition from one LMS to another and also what impact, if any, the natural disaster had on the process. Faculty and students were surveyed to gain understanding of how they perceived the transitioning process, their perception of both systems, their preferences, and why. Furthermore, we identified issues peculiar to transitioning during a natural disaster. The results of this study can be used to anticipate issues that may be associated with transitioning from one LMS to the other and issues peculiar to transitioning amidst a natural disaster. It can also be used to identify areas for improvement.
Επίδραση των παραμέτρων συγκόλλησης Laser, φύλλων λαμαρίνας ωστενιτικού ανοξείδωτου χάλυβα, στη μικροδομή και τις ιδιότητές τους.
Creators: name: Αχιλλέως, Ιωάννης Ανδρέα
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Συγκόλληση λέιζερ
Ανοξείδωτη λαμαρίνα
Ιδιότητες συγκόλλησης
Laser Welding
Stainless Steel
Welding Properties

description: Σε αυτήν την εργασία έχει γίνει μελέτη της μεθόδου συγκόλλησης με δέσμη laser αερίου CO² σε ανοξείδωτη λαμαρίνα τύπου 304L. Οι κατεργασίες με την χρήση laser όλο και αποκτούν μεγαλύτερο εύρος εφαρμογών και αντικαθιστούν συμβατικές μεθόδους κατεργασιών. Έτσι θεωρείται πολύ ενδιαφέρον πεδίο για την έρευνα σήμερα αλλά και στο μέλλον. Η πρακτική ανάγκη που ώθησε στην μελέτη αυτού του τύπου συγκόλλησης είναι η μειωμένη βιβλιογραφία στη συγκεκριμένη διεργασία δηλαδή συγκόλληση μεταξύ δύο φύλλων ανοξείδωτης λαμαρίνας του πάχους που μας ενδιαφέρει (1mm πάνω λαμαρίνα και 2 mm κάτω λαμαρίνα), η ανάγκη για μελέτη της αντοχής των συγκολλημένων περιοχών όπως και η παρατήρηση της δομής μετά από πλαστική παραμόρφωση, η ανάγκη να γίνει σύνδεση των αποτελεσμάτων της δομής σε σχέση με την αντοχή των κολλημάτων και η βελτιστοποίηση των παραμέτρων της διεργασίας ούτως ώστε να επιτευχθούν τα καλύτερα αποτελέσματα όσο αφορά την αντοχή μεταξύ των δυο συγκολλημένων φύλλων λαμαρίνας, η μελέτη της μεταλλουργικής πλευράς της περιοχής της συγκόλλησης.
description: In this project has been the study of welding method CO² gas laser beam at stainless steel type 304L sheet metal. The treatments using laser gain increasingly wider range of applications and replace conventional machining methods. This is considered very interesting field for research today and in the future. The practical need that led to the study of this type of welding is reduced literature in this process that is welding between the stainless steel of a thickness of interest (1mm top sheet and 2 mm in the lower sheet), the need to study the welded areas of resistance like the observation of structure after plastic deformation, the need to make connection of the structure results in relation to the strength of the join and the optimization of process parameters in order to achieve the best results as regards resistance between the two welded sheets sheet metal, the study of metallurgical side of the weld region.
Superconducting pipes and levitating magnets
Creators: name: Levin, Yan
name: Rizzato, Felipe B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Classical Physics (physics.class-ph)
subject: Superconductivity (cond-mat.supr-con)
subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: Motivated by a beautiful demonstration of the Faraday's and Lenz's law in which a small neodymium magnet falls slowly through a conducting non-ferromagnetic tube, we consider the dynamics of a magnet falling through a superconducting pipe. Unlike the case of normal conducting pipes, in which the magnet quickly reaches the terminal velocity, inside a superconducting tube the magnet falls freely. On the other hand, to enter the pipe the magnet must overcome a large electromagnetic energy barrier. For sufficiently strong magnets, the barrier is so large that the magnet will not be able to penetrate it and will be suspended over the front edge. We calculate the work that must done to force the magnet to enter a superconducting tube. The calculations show that superconducting pipes are very efficient at screening magnetic fields. For example, the magnetic field of a dipole at the center of a short pipe of radius $a$ and length $L \approx a$ decays, in the axial direction, with a characteristic length $ξ\approx 0.26 a$. The efficient screening of the magnetic field might be useful for shielding highly sensitive superconducting quantum interference devices, SQUIDs. Finally, the motion of the magnet through a superconducting pipe is compared and contrasted to the flow of ions through a trans-membrane channel.
Fate of symmetry protected coherence in open quantum system
Creators: name: Deng, Tian-Shu
name: Pan, Lei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We investigate the fate of coherence in the dynamical evolution of a symmetry protected quantum system. Under the formalism of system-plus-bath for open quantum system, the anti-unitary symmetry exhibits significant difference from the unitary one in protecting initial coherence. Specifically, taking advantage of Lindblad master equation, we find that a pure state in the symmetry protected degenerate subspace will decohere even though both the system Hamiltonian and system-environment interaction respect the same anti-unitary symmetry. In contrast, the coherence will persist when the protecting symmetry is unitary. We provide an elaborate classification table to illustrate what kinds of symmetry combinations are able to preserve the coherence of initial state, which is confirmed by several concrete models in spin-$3/2$ system. Our results could help to explore the possible experimental realization of stable time-reversal symmetric topological states.
description: 8 pages, 3 figures and 3 tables
Νικηφόρου Θεοτόκη, Θεματικές Ομιλίες στις Ευαγγελικές Περικοπές
Creators: name: Τσορμπατζίδου, Ευφραιμία Παναγιώτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Κυριακοδρόμιο
Εκπαίδευση
Κήρυγμα
Kyriakodromio
Education
Preaching
1. Καραμανίδου, Άννα, επίκ. καθηγήτρια
2. Λάμπρου, Σουλτάνα, επίκ. καθηγήτρια
3. Τσομπάνης, Τρύφων, επίκ. καθηγητής

description: Με την παρούσα διπλωματική εργασία στοχεύουμε στην ανάδειξη και μελέτη της θεματολογίας και των θεολογικών απόψεων του Νικηφόρου Θεοτόκη μέσα από το έργο του «Κυριακοδρόμιον», καθώς χαρακτηρίζονται από διαχρονικότητα και αναδύουν τις αλήθειες της ορθόδοξης πίστης. Αρχικά επιχειρήσαμε μία προσέγγιση του ιστορικο-κοινωνικού πλαισίου της εποχής, με εστίαση στον 18ο αιώνα, αναφορικά με την κατάσταση και την πορεία της παιδείας, το σπουδαίο ρόλο της εκκλησίας στην εκπαίδευση, την κηρυκτική γραμματεία και τους εκπροσώπους της, διότι όλα αυτά σχετίζονται άμεσα με το πρόσωπο του Θεοτόκη. Επιπλέον έγινε μία ιστορική αναδρομή του κηρύγματος εν γένει αλλά και των Κυριακοδρομίων. Στη συνέχεια αφού αναφερθήκαμε στο βίο του Νικηφόρου και την εκπαιδευτική του δράση, στην εργογραφία του, την οποία διαχωρίσαμε σε εκδεδομένα και σε ανέκδοτα έργα αλλά και σε επιστολές, στα βασικά γνωρίσματα και τις εκδόσεις του έργου του, κατόπιν παρουσιάσαμε σύντομα το περιεχόμενο των ομιλιών του «Κυριακοδρομίου» ομαδοποιημένο βάσει σημαντικών περιόδων και εορτών της ορθόδοξης εκκλησίας. Τέλος ασχοληθήκαμε με τη βασική θεολογική θεματολογία του «Κυριακοδρομίου», η οποία εμπίπτει σε δέκα θεματικές που περιλαμβάνουν τα επιμέρους θέματα του εν λόγω έργου, τα οποία κρίναμε ότι έχουν άμεση σχέση μεταξύ τους. Επιπρόσθετα, κατά τη θεώρησή μας, η σειρά παρουσίασης των θεματικών που ακολουθήσαμε αναδεικνύει την πνευματική πορεία που οδηγεί στη σωτηρία της ψυχής και είναι άξια σπουδής. Οι θεολογικές απόψεις του συγγραφέα καθίστανται εμφανείς κατά τη μελέτη της θεματολογίας και αφορούν τόσο πρακτικά όσο και πνευματικά ζητήματα που πιθανόν να απασχολούν το σύγχρονο άνθρωπο, στον οποίο δύνανται να προσφέρουν ό,τι αναζητά.
description: The aim of this thesis is to highlight and study the theological opinions on a series of issues of Nikiforos Theotokis through “ Kyriakodromio “. Initially, we quoted on the characteristics of his time, educational system and preaching. We also commended on Theotokis life and operations. Furthermore we briefly presented his speeches in “ Kyriakodromio” and resulted in his main theological themes through which the author̓s opinions became clear not only on religious issues but on practical ones as well pointing aut the everlastic effects of his ideas.
Statistical aspects of birth--and--growth stochastic processes
Creators: name: Aletti, Giacomo
name: Bongiorno, Enea G.
name: Capasso, Vincenzo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: The paper considers a particular family of set--valued stochastic processes modeling birth--and--growth processes. The proposed setting allows us to investigate the nucleation and the growth processes. A decomposition theorem is established to characterize the nucleation and the growth. As a consequence, different consistent set--valued estimators are studied for growth process. Moreover, the nucleation process is studied via the hitting function, and a consistent estimator of the nucleation hitting function is derived.
description: simpler notations typos
Prism international
Creators: name: Prism International
Publisher: name: Vancouver : The Creative Writing Program of the University of British Columbia
Year: 2015

description: The following description is provided by the publisher:
 FICTION
 “Naked in a Dirty Lake” by Charlotte Bondy
 “Graduation” by Amanda Leduc
 “King Arthur on Fire” by Mark Jordan Manner
 “The Date” by Sarah Meehan Sirk
 POETRY
 “An Infrequent Flyer Looks Down”, “Breach”, “Lacunae”, “A Guide to Modern Verse”, and “Swept Away” by Robyn Sarah
 “Flying” by Don Coles
 “The afternoon before the clocks turn back” by Alice Major
 “Reflections on a Perceived Moment of Solitude” by Stephen Brockwell
 “Shift” by Stephanie Yorke
 “Mary, at home, thinking on things” by Pamela Mordecai
 “Picking Blackberries With My Daughter” and “Jail” by Russell Thornton
 “Tar Songs: Maestro” and “Tar Songs: In the Mines of Mordor” by Laurelyn Whitt
 “Grief” by Susan Alexander
 “De Facto” by Rocco de Giacomo
 NON-FICTION
 “Correctives” by Liz Windhorst Harmer
 “Hornets” by Ayelet Tsabari
 “Warren” by Trisha Cull
 TRANSLATION
 “Reading Seamus Heaney” by Marina Moretti, translation by Patricia Hanley
 COVER IMAGE
 “Ice Dreams VII” by Paul Zizka
Cosmic String Structure at the Gravitational Radiation Scale
Creators: name: Polchinski, Joseph
name: Rocha, Jorge V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We use our model of the small scale structure on cosmic strings to develop further the result of Siemens, Olum, and Vilenkin that the gravitational radiation length scale on cosmic strings is smaller than the previously assumed $ΓGμt$. We discuss some of the properties of cosmic string loops at this cutoff scale, and we argue that recent network simulations point to two populations of cosmic string loops, one near the horizon scale and one near the gravitational radiation cutoff.
description: 15 pages, 1 figure. v2, v3: small corrections, updated references
Additional file 3 of Gastrointestinal symptoms of long COVID-19 related to the ectopic colonization of specific bacteria that move between the upper and lower alimentary tract and alterations in serum metabolites
Creators: name: Zhang, Deyu
name: Weng, Siyuan
name: Xia, Chuanchao
name: Ren, Yuqing
name: Liu, Zaoqu
name: Xu, Yudi
name: Yang, Xiaoli
name: Wu, Ruhao
name: Peng, Lisi
name: Sun, Liqi
name: Zhu, Jiaqi
name: Liang, Xuesong
name: Jia, Yin
name: Wang, Huaizhou
name: Chen, Qian
name: Liu, Dongtian
name: Chen, Yi
name: Guo, Honglei
name: Han, Xinwei
name: Jin, Zhendong
name: Chen, Cui
name: Yang, Xia
name: Li, Zhaoshen
name: Huang, Haojie
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Cancer
subject: Virology

description: Additional file 3: Figure S1. Diversity differences in the gut microbiome. Figure S2. Comparison of gut microbiota between recovers without GI symptoms at 3 months of follow-up after COVID-19 and those with mild disease. Figure S3. Diversity differences in the oral microbiome. Figure S4. Comparison of oral microbiota between recovers without GI symptoms at 3 months of follow-up after COVID-19 and those with mild disease. Figure S5. Alteration of specific metabolites in patient serum.
How the Mastery Rubric for Bioinformatics (MR-Bi) supports course and curriculum development
Creators: name: Lindvall, Jessica
name: Attwood, Teresa
name: Via, Allegra
name: Tractenberg, Rochelle
Publisher: name: F1000 Research Limited
Year: 2019

description: Abstract for poster and talk to presented 25 July 2019 at ISMB/ECCB 2019 as part of the Education COSI:

Background: As the life sciences have become more computational and data intensive, the pressure to incorporate the requisite training into life-science education and training programs has increased. To facilitate curriculum development, various sets of bioinformatics competencies have been articulated; however, these have proved difficult to implement in practice. Addressing this issue, we have created a curriculum design and evaluation tool – the Mastery Rubric for Bioinformatics (MR-Bi) - to support the development of specific Knowledge, Skills and Abilities (KSAs) that promote bioinformatics practice and the achievement of competencies.

Methods: 12 KSAs were extracted, and stages along a developmental trajectory were identified. The KSAs and their performance level descriptors at each stage were formulated, ultimately yielding the MR-Bi.

Results and Conclusions: The MR-Bi prioritizes the development of independence and scientific reasoning. It can be used by practicing scientists at all career stages to direct their (and their team’s) acquisition of new, or to deepen existing, bioinformatics KSAs. It can be used to strengthen teaching and learning and for curriculum building. It can thereby contribute to the cultivation of a next generation of bioinformaticians who can design reproducible and rigorous research, and to critically analyze results from their own, and others’, work.
Gravitational lensing in fourth order gravity
Creators: name: Capozziello, S.
name: Cardone, V. F.
name: Troisi, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Gravitational lensing is investigated in the weak field limit of fourth order gravity in which the Lagrangian of the gravitational field is modified by replacing the Ricci scalar curvature R with an analytical expression $f(R)$. Considering the case of a pointlike lens, we study the behaviour of the deflection angle in the case of power law Lagrangians, i.e. with f(R) = f_0 R^n. In order to investigate possible detectable signatures, the position of the Einstein ring and the solutions of the lens equation are evaluated considering the change with respect to the standard case. Effects on the amplification of the images and the Paczynski curve in microlensing experiments are also estimated.
description: 10 pages, 3 figures, accepted for publication on Physical Review D
Learning Efficient Navigation in Vortical Flow Fields
Creators: name: Gunnarson, Peter
name: Mandralis, Ioannis
name: Novati, Guido
name: Koumoutsakos, Petros
name: Dabiri, John O.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Efficient point-to-point navigation in the presence of a background flow field is important for robotic applications such as ocean surveying. In such applications, robots may only have knowledge of their immediate surroundings or be faced with time-varying currents, which limits the use of optimal control techniques for planning trajectories. Here, we apply a novel Reinforcement Learning algorithm to discover time-efficient navigation policies to steer a fixed-speed swimmer through an unsteady two-dimensional flow field. The algorithm entails inputting environmental cues into a deep neural network that determines the swimmer's actions, and deploying Remember and Forget Experience replay. We find that the resulting swimmers successfully exploit the background flow to reach the target, but that this success depends on the type of sensed environmental cue. Surprisingly, a velocity sensing approach outperformed a bio-mimetic vorticity sensing approach by nearly two-fold in success rate. Equipped with local velocity measurements, the reinforcement learning algorithm achieved near 100% success in reaching the target locations while approaching the time-efficiency of paths found by a global optimal control planner.
description: 6 pages, 6 figures
A Kirchhoff-like theory for hard magnetic rods under geometrically nonlinear deformation in three dimensions
Creators: name: Sano, Tomohiko G.
name: Pezzulla, Matteo
name: Reis, Pedro M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Magneto-rheological elastomers (MREs) are functional materials that can be actuated by applying an external magnetic field. MREs comprise a composite of hard magnetic particles dispersed into a nonmagnetic elastomeric matrix. By applying a strong magnetic field, one can magnetize the structure to program its deformation under the subsequent application of an external field. Hard MREs, whose coercivities are large, have been receiving particular attention because the programmed magnetization remains unchanged upon actuation. Hence, once a structure made of a hard MRE is magnetized, it can be regarded as magnetized permanently. Motivated by a new realm of applications, there have been significant theoretical developments in the continuum description of hard MREs. By reducing the 3D description into 1D or 2D via dimensional reduction, several theories of hard magnetic slender structures such as linear beams, elastica, and shells have been recently proposed. In this paper, we derive an effective theory for MRE rods under geometrically nonlinear 3D deformation. Our theory is based on reducing the 3D magneto-elastic energy functional for the hard MREs into a 1D Kirchhoff-like description. Restricting the theory to 2D, we reproduce previous works on planar deformations. For further validation in the general case of 3D deformation, we perform precision experiments with both naturally straight and curved rods under either constant or constant-gradient magnetic fields. Our theoretical predictions are in excellent agreement with both discrete simulations and precision-model experiments. Finally, we discuss some limitations of our framework, as highlighted by the experiments, where long-range dipole interactions, which are neglected in the theory, can play a role.
description: 33 pages, 10 figures
title: Stillstand der Körper im Krieg. Von den Pflichten des Heroischen und dem Reiz des Alltags in der illustrierten Massenpresse des Nationalsozialismus (1939-1945)
Creators: name: Marstaller, Vera
Publisher: name: ZZF - Centre for Contemporary History: Visual History
Year: 2019

description: Es gibt keinen Krieg ohne Heldengeschichten. Gegenwärtige Forschungen zum NS-Heldenkult knüpfen an diesen Gedanken unmittelbar an, vertreten jedoch zwei sehr unterschiedliche Ansichten, ohne dass dies eine Forschungsdebatte ausgelöst hätte: Auf der einen Seite steht die Vermutung, erst nach dem Ende des Zweiten Weltkriegs, und somit nachdem der soldatische Heldenkult mit den Verbrechen der Nazis in Verbindung gebracht werden konnte, sei Abstand genommen worden von heroisierenden Kriegserzählungen. Auf der anderen Seite steht der Befund, schon während des Zweiten Weltkriegs und vor allem mit der Niederlage der 6. Armee in Stalingrad 1943 sei die Heroisierung der Wehrmacht unglaubhaft geworden. Mein Dissertationsprojekt überprüft diese These in Bezug auf die Wehrmachtssoldaten durch die Analyse der in illustrierten Zeitschriften veröffentlichten Bilder, die von Fotografen der NS-Propagandakompanien aufgenommen wurden und damit der Zensur des Reichsministeriums für Volksaufklärung und Propaganda und des Oberkommandos der Wehrmacht unterstanden.
Collective Excitations of a Two-Component Bose Condensate at Finite Temperature
Creators: name: Zhang, C. -H.
name: Fertig, H. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We compare the collective modes for Bose-condensed systems with two degenerate components with and without spontaneous intercomponent coherence at finite temperature using the time-dependent Hartree-Fock approximation. We show that the interaction between the condensate and non-condensate in these two cases results in qualitatively different collective excitation spectra. We show that at zero temperature the single-particle excitations of the incoherent Bose condensate can be probed by intercomponent excitations.
description: 4 pages, 3 figures, Submitted to PRL
Defining effective participation : a case study of the Vancouver International Airport Environmental Assessment and Review Process
Creators: name: Rowson, Juliet Mary
Publisher: name: University of British Columbia
Year: 2009

description: Since the late 1960’s, public participation in environmental decision making has become increasingly common. Such participation, however, has often been performed in an uncoordinated fashion, with little reflection upon the forms of participation which are most effective in terms of meeting societal goals. In a democracy such as Canada, effective participation is the form of participation deemed most desirable by the general population. Therefore, the aim of this study is to obtain a ‘democratic’ definition of effective participation in environmental decision making. I have selected the Vancouver International Airport Environmental Assessment and Review Process as a case study. Interviews with forty-three participants were carried out in order to determine their definition of effective public participation. Public participation has been conceptualized as being composed of a primary dimension, the degree of power sharing between elected officials and the public; and five secondary criteria which are necessary to reach effective participation in practice. These five criteria are: who is permitted to participate in environmental decision making; the degree of access to resources; the nature of the participatory mechanism; the scope of the participatory process; and finally the stage in the decision making process that participation is solicited. In terms of the primary dimension of participation, it was found that the consultative model of decision making was the most popular definition of effective participation. The Environmental Assessment and Review Process itself was a consultative process, therefore, the majority of the interviewees considered the ‘status quo’ level of power sharing to be most conducive to effective participation. Opinions of effective participation in terms of power sharing were dependent upon individuals’ participatory experiences, motivation for participation, and sociological makeup. In terms of the five secondary effectiveness criteria, a third of the participants found that the Environmental Assessment and Review Process was already conducive to effective participation. Alternative visions of effective participation in practice were expressed, and they were commonly associated with an individual’s motivation for participation.
Joule Heating and Current-Induced Instabilities in Magnetic Nanocontacts
Creators: name: Kadigrobov, A.
name: Kulinich, S. I.
name: Shekhter, R. I.
name: Jonson, M.
name: Korenivski, V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We consider the electrical current through a magnetic point contact in the limit of a strong inelastic scattering of electrons. In this limit local Joule heating of the contact region plays a decisive role in determining the transport properties of the point contact. We show that if an applied constant bias voltage exceeds a critical value, the stationary state of the system is unstable, and that periodic, non-harmonic oscillations in time of both the electrical current through the contact and the local temperature in the contact region develop spontaneously. Our estimations show that the necessary experimental conditions for observing such oscillations with characteristic frequencies in the range $10^8 ÷10^9$ Hz can easily be met. We also show a possibility to manipulate upon the magnetization direction of a magnetic grain coupled through a point contact to a bulk ferromagnetic by exciting the above-mentioned thermal-electric oscillations.
description: 9 pages, 6 figures, submitted to Physical Review B
CRAFTS for Fast Radio Bursts Extending the dispersion-fluence relation with new FRBs detected by FAST
Creators: name: Niu, Chen-Hui
name: Li, Di
name: Luo, Rui
name: Wang, Wei-Yang
name: Yao, Jumei
name: Zhang, Bing
name: Zhu, Wei-Wei
name: Wang, Pei
name: Ye, Haoyang
name: Zhang, Yong-Kun
name: Niu, Jia-rui
name: Tang, Ning-yu
name: Duan, Ran
name: Krco, Marko
name: Dai, Shi
name: Feng, Yi
name: Miao, Chenchen
name: Pan, Zhichen
name: Qian, Lei
name: Xue, Mengyao
name: Yuan, Mao
name: Yue, Youling
name: Zhang, Lei
name: Zhang, Xinxin
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report three new FRBs discovered by the Five-hundred-meter Aperture Spherical radio Telescope (FAST), namely FRB 181017.J0036+11, FRB 181118 and FRB 181130, through the Commensal Radio Astronomy FAST Survey (CRAFTS). Together with FRB 181123 that was reported earlier, all four FAST-discovered FRBs share the same characteristics of low fluence ($\leq$0.2 Jy ms) and high dispersion measure (DM, $>1000$ \dmu), consistent with the anti-correlation between DM and fluence of the entire FRB population. FRB 181118 and FRB 181130 exhibit band-limited features. FRB 181130 is prominently scattered ($τ_s\simeq8$ ms) at 1.25 GHz. FRB 181017.J0036+11 has full-bandwidth emission with a fluence of 0.042 Jy ms, which is one of the faintest FRB sources detected so far. CRAFTS starts to built a new sample of FRBs that fills the region for more distant and fainter FRBs in the fluence-$\rm DM_E$ diagram, previously out of reach of other surveys. The implied all sky event rate of FRBs is $1.24^{+1.94}_{-0.90} \times 10^5$ sky$^{-1}$ day$^{-1}$ at the $95\%$ confidence interval above 0.0146 Jy ms. We also demonstrate here that the probability density function of CRAFTS FRB detections is sensitive to the assumed intrinsic FRB luminosity function and cosmological evolution, which may be further constrained with more discoveries.
description: 9 Pages, 4 Plots and 1 Table. The Astrophysical Journal Letter Accepted
Additional file 4 of Gastrointestinal symptoms of long COVID-19 related to the ectopic colonization of specific bacteria that move between the upper and lower alimentary tract and alterations in serum metabolites
Creators: name: Zhang, Deyu
name: Weng, Siyuan
name: Xia, Chuanchao
name: Ren, Yuqing
name: Liu, Zaoqu
name: Xu, Yudi
name: Yang, Xiaoli
name: Wu, Ruhao
name: Peng, Lisi
name: Sun, Liqi
name: Zhu, Jiaqi
name: Liang, Xuesong
name: Jia, Yin
name: Wang, Huaizhou
name: Chen, Qian
name: Liu, Dongtian
name: Chen, Yi
name: Guo, Honglei
name: Han, Xinwei
name: Jin, Zhendong
name: Chen, Cui
name: Yang, Xia
name: Li, Zhaoshen
name: Huang, Haojie
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Cancer
subject: Virology

description: Additional file 4: Table S2. Differential metabolites in serum between follow-up group and mild group.
Model selection for $K^+Σ^-$ photoproduction within isobar model
Creators: name: Bydžovský, Petr
name: Cieplý, Aleš
name: Petrellis, Dimitrios
name: Skoupil, Dalibor
name: Zachariou, Nicholas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We utilise an isobar model to investigate the $K^+ Σ^-$ photoproduction off a neutron in the resonance region. Except for the Born terms, we include high-spin (spin-3/2 and spin-5/2) nucleon resonances in the consistent formalism together with a few $Δ$ and kaon resonances to achieve an acceptable agreement with data. Interestingly, we reveal that no hyperon resonances are needed to achieve a reasonable description of data. On the other hand the $N(1720)3/2^+$ resonance was found to be very important for correct description of data. The free parameters of the model were fitted to experimental data from the LEPS and CLAS Collaborations on either differential cross sections or photon beam asymmetry. The novel feature of the fitting procedure is the use of a regularization method, the Least Absolute Shrinkage Selection Operator, and information criteria in order to choose the best fit.
description: 14 pages, 10 figures
Period and index in the Brauer group of an arithmetic surface (with an appendix by Daniel Krashen)
Creators: name: Lieblich, Max
Publisher: name: arXiv
Year: 2007
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 14D15 (Primary), 14G27, 16K50 (Secondary)

description: In this paper we introduce two new ways to split ramification of Brauer classes on surfaces using stacks. Each splitting method gives rise to a new moduli space of twisted stacky vector bundles. By studying the structure of these spaces we prove new results on the standard period-index conjecture. The first yields new bounds on the period-index relation for classes on curves over higher local fields, while the second can be used to relate the Hasse principle for forms of moduli spaces of stable vector bundles on pointed curves over global fields to the period-index problem for Brauer groups of arithmetic surfaces. We include an appendix by Daniel Krashen showing that the local period-index bounds are sharp.
description: 29 pages. Major revision: completely different methods, an earlier error corrected, paper reorganized. Comments are still welcome!
Genetic Meta-Structure Search for Recommendation on Heterogeneous Information Network
Creators: name: Han, Zhenyu
name: Xu, Fengli
name: Shi, Jinghan
name: Shang, Yu
name: Ma, Haorui
name: Hui, Pan
name: Li, Yong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: Machine Learning (cs.LG)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: In the past decade, the heterogeneous information network (HIN) has become an important methodology for modern recommender systems. To fully leverage its power, manually designed network templates, i.e., meta-structures, are introduced to filter out semantic-aware information. The hand-crafted meta-structure rely on intense expert knowledge, which is both laborious and data-dependent. On the other hand, the number of meta-structures grows exponentially with its size and the number of node types, which prohibits brute-force search. To address these challenges, we propose Genetic Meta-Structure Search (GEMS) to automatically optimize meta-structure designs for recommendation on HINs. Specifically, GEMS adopts a parallel genetic algorithm to search meaningful meta-structures for recommendation, and designs dedicated rules and a meta-structure predictor to efficiently explore the search space. Finally, we propose an attention based multi-view graph convolutional network module to dynamically fuse information from different meta-structures. Extensive experiments on three real-world datasets suggest the effectiveness of GEMS, which consistently outperforms all baseline methods in HIN recommendation. Compared with simplified GEMS which utilizes hand-crafted meta-paths, GEMS achieves over $6\%$ performance gain on most evaluation metrics. More importantly, we conduct an in-depth analysis on the identified meta-structures, which sheds light on the HIN based recommender system design.
description: Published in Proceedings of the 29th ACM International Conference on Information and Knowledge Management (CIKM '20)
Coulomb electron drag mechanism of terahertz plasma instability in n+-i-n-n+ graphene FETs with ballistic injection
Creators: name: Ryzhii, V.
name: Ryzhii, M.
name: Mitin, V.
name: Shur, M. S.
name: Otsuji, T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We predict the self-excitation of terahertz (THz) oscillations due to the plasma instability in the lateral n+-i-n-n+$ graphene field-effect transistors (G-FET). The instability is associated with the Coulomb drag of the quasi-equilibrium electrons in the gated channel by the injected ballistic electrons resulting in a positive feedback between the amplified dragged electrons current and the injected current. The plasma excitations arise when the drag effect is sufficiently strong. The drag efficiency and the plasma frequency are determined by the quasi-equilibrium electrons Fermi energy (i.e., by their density). The conditions of the terahertz plasma oscillation self-excitation can be realized in the G-FETs with realistic structural parameters at room temperature enabling the potential G-FET-based radiation sources for the THz applications.
description: 5 pages, 3 figures
Prism international
Creators: name: Prism International
Publisher: name: Vancouver : The Creative Writing Program of the University of British Columbia
Year: 2017

description: The following description is provided by the publisher:
 NON-FICTION CONTEST ISSUE
 (judged by Charles Demers)
 GRAND PRIZE
 “Doughnut Eaters” by Diane Bracuk
 RUNNERS-UP
 “Sea Salt” by Sarah Mitchell
 “The Generation After” by Ann Cavlovic
 FICTION
 “Four Nocturnes for Left Hand” by Scott Nadelson
 “Plus One” by Greg Rhyno
 “I Thought I’d Get More” by Richard Kelly Kemick
 POETRY
 “Five Excerpts from Joy, breathe” by Nora Gould
 “Breathe” by Katy E. Ellis
 “Something Funny” and “Sun Rises in a Chinese Hospital” by Michelle Brown
 “L’Immigrant” by Patrick Warner
 “Cycling” by Nicholas Bradley
 “Petoskey Stone”, “Folds”, “I Find It Lovely That We Name Our Boats” and “A Hoard of Driftwood” by Todd Boss
 “Forget the Mousetrap, Build the Better Bomb” by Angela Rebrec
 “Locus” by Evelyn Lau
 “Made in America” and “A Glass for You” by Derek Sheffield
 “autobiography of grief 1”, “autobiography of grief 2” and “what remains” by Daniela Elza
 “North Street” by Margo Wheaton
 COVER IMAGE
 “Pizza Pug 2.” by Jonpaul Douglass
An absorption origin for the X-ray spectral variability of MCG-6-30-15
Creators: name: Miller, L.
name: Turner, T. J.
name: Reeves, J. N.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Seyfert I galaxy MCG-6-30-15 shows one of the best examples of a broad "red wing" of emission in its X-ray spectrum at energies 2 < E < 6.4 keV, commonly interpreted as being caused by relativistically-blurred reflection close to the event horizon of the black hole. We aim to test an alternative model in which absorption creates the observed spectral shape, explains the puzzling lack of variability of the red wing and reduces the high reflection albedo, substantially greater than unity, that is otherwise inferred at energies E > 20 keV. We compiled all the available long-exposure, high-quality data for MCG-6-30-15: 522 ks of Chandra HETGS, 282 ks of XMM-Newton pn/RGS and 253 ks of Suzaku XIS/PIN data. This is the first analysis of this full dataset. We investigated the spectral variability on timescales >20 ks using principal components analysis and fitted spectral models to "flux state" and mean spectra over the energy range 0.5-45 keV (depending on detector). The absorber model was based on the zones previously identified in the high-resolution grating data. Joint fits were carried out to any data that were simultaneous. Multiple absorbing zones covering a wide range of ionisation are required by the grating data, including a highly ionised outflowing zone. A variable partial-covering zone plus absorbed low-ionisation reflection, distant from the source, provides a complete description of the variable X-ray spectrum. A single model fits all the data. We conclude that these zones are responsible for the red wing, its apparent lack of variability, the absorption structure around the Fe K-alpha line, the soft-band "excess" and the high flux seen in the hard X-ray band. A relativistically-blurred Fe line is not required in this model. We suggest the partial covering zone is a clumpy wind from the accretion disk.
description: Accepted for publication in Astronomy and Astrophysics. Corrected version
Kink properties in Lorentz-violating scalar field theory
Creators: name: Moazzemi, Reza
name: Ettefaghi, Mohammad Mehdi
name: Mojavezi, Amirhosein
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider topological defects for the $λϕ^4$ theory in (1+1) dimensions with a Lorentz-violating background. It has been shown, by M. Barreto et al. (2006) \cite{barreto2006defect}, one cannot have original effects in (the leading order of) single scalar field model. Here, we introduce a new Lorentz-violating term, next to leading order which cannot be absorbed by any redefinition of the scalar field or coordinates. Our term is the lowest order term which leads to concrete effects on the kink properties. We calculate the corrections to the kink shape and the corresponding mass. Quantization of the kink is performed and the revised modes are obtained. We find the bound and continuum states are affected due to this Lorentz symmetry violation.
description: 18 pages, 2 figures, elsarticle format, to appear in NPB
Measurement of the ttbar Production Cross Section in ppbar collisions at sqrt{s} = 1.96 TeV using Lepton+Jets Events with Jet Probability b-tagging
Creators: name: CDF Collaboration
name: Abulencia, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present a measurement of the ttbar production cross section using events with one charged lepton and jets from ppbar collisions at a center-of-mass energy of 1.96 TeV. A b-tagging algorithm based on the probability of displaced tracks coming from the event interaction vertex is applied to identify b quarks from top decay. Using 318 pb^{-1} of data collected with the CDF II detector, we measure the ttbar production cross section in events with at least one restrictive (tight) b-tagged jet and obtain 8.9 +1.0-1.0 (stat.) +1.1-1.0 (syst.) pb. The cross section value assumes a top quark mass of m_{t}=178 GeV in the acceptance corrections. The dependence of the cross section on m_t is presented in the paper. This result is consistent with other CDF measurements of the ttbar cross section using different samples and analysis techniques, and has similar systematic uncertainties. We have also performed consistency checks by using the b-tagging probability function to vary the signal to background ratio and also using events that have at least two b-tagged jets.
description: 45 pages, 27 figures, submitted to Physical Review D
Παρασκευή και μελέτη πράσινων νανοσύνθετων εποξειδικών ρητινών με χρήση μονομερών από ανανεώσιμες πηγές
Creators: name: Νικολαΐδης, Βασίλειος
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Εποξειδικές ρητίνες
Νανοσύνθετες
Ανανεώσιμες πηγές
Epoxy resins
Nanocomposites
Renewable Sources

description: Σκοπός της εργασίας ήταν η παρασκευή των εποξειδικών ρητινών από ανανεώσιμες πηγές πρώτων υλών και η μελέτη της εξέλιξης της αντίδρασης δικτύωσης, καθώς και επίδραση των προσθέτων στην θερμική σταθερότητα της ρητίνης. Έτσι και η συγκεκριμένη εργασία επικεντρώθηκε στην παρασκευή εποξειδικών ρητινών από εποξειδωμένο έλαιο σόγιας με το δικαρβοξυλικό οξύ γλουταρικό οξύ. Επίσης, χρησιμοποιήθηκαν νανοπρόσθετα για την βελτίωση των μηχανικών και θερμικών ιδιοτήτων. Μελετηθήκαν οι μηχανικές ιδιότητες με μέτρηση της αντοχής στον εφελκυσμό καθώς και ο ρυθμός βιοαποικοδόμησης τους με αποικοδόμηση στο έδαφος. Όλα τα στάδια μελετήθηκαν με φωτογραφίες από το ηλεκτρονικό μικροσκόπιο σάρωσης.
description: The aim of this thesis was the the preparation of epoxy resins from renewable raw materials and the study of the curing reaction process, also the response and the effect of additives on the resin’s thermal stability. So this particular work focused on the manufacture of epoxy resins of epoxidized soybean oil with the dicarboxylic acid glutaric acid. Also nanoadditives used to improve the mechanical and thermal properties. We studied the mechanical properties by measuring tensile strength as well as their rate of degradation by biodegradation in soil. All stages were studied with photographs from scanning electron microscopy.
Spin light of electron in matter
Creators: name: Grigoriev, Alexander
name: Shinkevich, Sergey
name: Studenikin, Alexander
name: Ternov, Alexei
name: Trofimov, Ilya
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We further generalize the powerful method, which we have recently developed for description of the background matter influence on neutrinos, for the case of an electron moving in matter. On the basis of the modified Dirac equation for the electron, accounting for the standard model interaction with particles of the background, we predict and investigate in some detail a new mechanism of the electromagnetic radiation that is emitted by moving in matter electron due to its magnetic moment. We have termed this radiation the ``spin light of electron" in matter and predicted that this radiation can have consequences accessible for experimental observations in astrophysical and cosmological settings.
description: 5 pages in LaTex, in: "Particle Physics at the Year of 250th Anniversary of Moscow University", ed. by A.Studenikin, World Scientific, Singapore, 2006, p. 73 (Proceedings of the 12th Lomonosov Conference on Elementary Particle Physics, August 2005, Moscow)