cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Quantum fluids in nanopores
Creators: name: Urban, Nathan M.
name: Cole, Milton W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We describe calculations of the properties of quantum fluids inside nanotubes of various sizes. Very small radius ($R$) pores confine the gases to a line, so that a one-dimensional (1D) approximation is applicable; the low temperature behavior of 1D $^4$He is discussed. Somewhat larger pores permit the particles to move off axis, resulting eventually in a transition to a cylindrical shell phase--a thin film near the tube wall; we explored this behavior for H$_2$. At even larger $R\sim 1$ nm, both the shell phase and an axial phase are present. Results showing strong binding of cylindrical liquids $^4$He and $^3$He are discussed.
description: 8 pages, 4 figures, uses ws-ijmpb, graphicx, xspace; minor revisions from version published in Proc. 13th Intl. Conference on Recent Progress in Many-Body Theories (QMBT13), Buenos Aires, 2006
Cascade production in the reactions gamma p --> K+ K+ (X) and gamma p --> K^+ K^+ pi- (X)
Creators: name: Guo, L.
name: Weygand, D. P.
name: Battaglieri, M.
name: De Vita, R.
name: Kubarovsky, V.
name: Stoler, P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Photoproduction of the cascade resonances has been investigated in the reactions $γp \to K^+ K^+ (X)$ and $γp \to K^+ K^+ π^- (X)$. The mass split of the $Ξ$ doublet is measured to be $5.4\pm 1.8$ MeV/c$^2$, consistent with existing measurements. The differential (total) cross sections for the $Ξ^{-}$ have been determined for photon beam energies from 2.75 to 3.85 (4.75) GeV, and are consistent with a possible production mechanism of $Y^*\to K^+Ξ^-$ through a $t$-channel process. The reaction $γp \to K^+ K^+ π^-[Ξ^0]$ has also been investigated in search of excited cascade resonances. No significant signal of excited cascade states other than the $Ξ^-(1530)$ is observed. The cross section results of the $Ξ^-(1530)$ have also been obtained for photon beam energies from 3.35 to 4.75 GeV.
description: 10 pages, 10 figures
Additional file 3 of The impact of reporting magnetic resonance imaging incidental findings in the Canadian alliance for healthy hearts and minds cohort
Creators: name: Luu, Judy M.
name: Sergeant, Anand K.
name: Anand, Sonia S.
name: Desai, Dipika
name: Schulze, Karleen
name: Knoppers, Bartha M.
name: Zawati, Ma’n H.
name: Smith, Eric E.
name: Moody, Alan R.
name: Black, Sandra E.
name: Larose, Eric
name: Marcotte, Francois
name: Kleiderman, Erika
name: Tardif, Jean-Claude
name: Lee, Douglas S.
name: Friedrich, Matthias G.
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Science Policy
subject: Mental Health

description: Additional file 3. Supplementary Comments 1 to 4: Additional background and discussion.
Dust Transport in Protoplanetary Disks with Wind-driven Accretion
Creators: name: Hu, Zitao
name: Bai, Xue-Ning
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: It has recently been shown that the inner region of protoplanetary disks (PPDs) is governed by wind-driven accretion, and the resulting accretion flow showing complex vertical profiles. Such complex flow structures are further enhanced due to the Hall effect, especially when the background magnetic field is aligned with disk rotation. We investigate how such flow structures impact global dust transport via Monte-Carlo simulations, focusing on two scenarios. In the first scenario, the toroidal magnetic field is maximized in the miplane, leading to accretion and decretion flows above and below. In the second scenario, the toroidal field changes sign across the midplane, leading to an accretion flow at the disk midplane, with decretion flows above and below. We find that in both cases, the contribution from additional gas flows can still be accurately incorporated into the advection-diffusion framework for vertically-integrated dust transport, with enhanced dust radial diffusion up to an effective $α^{\rm eff}\sim10^{-2}$ for strongly coupled dust, even when background turbulence is weak $α<10^{-4}$. Dust radial drift is also modestly enhanced in the second scenario. We provide a general analytical theory that accurately reproduces our simulation results, thus establishing a framework to model global dust transport that realistically incorporates vertical gas flow structures. We also note that the theory is equally applicable to the transport of chemical species.
description: 15 pages, 8 figures, accepted in MNRAS
The spherical collapse model with shell crossing
Creators: name: Sanchez-Conde, M. A.
name: Betancort-Rijo, J.
name: Prada, F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this work, we study the formation and evolution of dark matter halos by means of the spherical infall model with shell-crossing. We present a framework to tackle this effect properly based on the numerical follow-up, with time, of that individual shell of matter that contains always the same fraction of mass with respect to the total mass. In this first step, we do not include angular momentum, velocity dispersion or triaxiality. Within this framework - named as the Spherical Shell Tracker (SST) - we investigate the dependence of the evolution of the halo with virial mass, with the adopted mass fraction of the shell, and for different cosmologies. We find that our results are very sensitive to a variation of the halo virial mass or the mass fraction of the shell that we consider. However, we obtain a negligible dependence on cosmology. Furthermore, we show that the effect of shell-crossing plays a crucial role in the way that the halo reaches the stabilization in radius and the virial equilibrium. We find that the values currently adopted in the literature for the actual density contrast at the moment of virialization, delta_vir, may not be accurate enough. In this context, we stress the problems related to the definition of a virial mass and a virial radius for the halo. The question of whether the results found here may be obtained by tracking the shells with an analytic approximation remains to be explored.
description: 15 pages, 4 figures, 9 tables, replaced to match the published MNRAS version
A computational theory of decision networks
Creators: name: Zhang, Nevin Lianwen
Publisher: name: University of British Columbia
Year: 2009

description: This thesis is about how to represent and solve decision problems in Bayesian decision the ory (e.g. Fishburn 1988). A general representation named decision networks is proposed based on influence diagrams (Howard and Matheson 1984). This new representation incorporates the idea, from Markov decision processes (e.g. Puterman 1990, Denardo 1982), that a decision may be conditionally independent of certain pieces of available information. It also allows multiple cooperative agents and facilitates the exploitation of separability in the utility function. Decision networks inherit the advantages of both influence diagrams and Markov decision processes. Both influence diagrams and finite stage Markov decision processes are stepwise solvable, in the sense that they can be evaluated by considering one decision at a time. However, the evaluation of a decision network requires, in general, simultaneous consider ation of all the decisions. The theme of this thesis is to seek the weakest graph-theoretic condition under which decision networks are guaranteed to be stepwise-solvable, and to seek the best algorithms for evaluating stepwise-solvable decision networks. A concept of decomposability is introduced for decision networks and it is shown that when a decision network is decomposable, a divide and conquer strategy can be utilized to aid its evaluation. In particular, when a decision network is stepwise-decomposable it can be evaluated not only by considering one decision at a time, but also by considering one portion of the network at a time. It is also shown that stepwise-decomposability is the weakest graphical condition that guarantees stepwise-solvability. Given a decision network, there are often nodes and arcs that can harmlessly removed. An algorithm is presented that is able to find and prune all graphically identifiable removable nodes and arcs. Finally, the relationship between stepwise-decomposable decision networks (SDDN‘s) and Markov decision process is investigated, which results in a two-stage approach for evaluating SDDN’s. This approach enables one to make use of the asymmetric nature of decision problems, facilitates parallel computation, and gives rises to an incremental way of computing the value of perfect information.
Unified language and operating system support for parallel processing
Creators: name: Acton, Donald William
Publisher: name: University of British Columbia
Year: 2009

description: The programming of parallel and distributed applications is difficult. The proliferation of net works of workstations, combined with the advent of shared memory-machines for desktop and office use, is making parallel and distributed environments more commonplace. And, there is an increasing demand for general purpose applications to be able to make use of these extra processing resources. This thesis explores the adding of language and system support for general purpose parallel and distributed programming to the object-oriented language and system Raven. The system is targeted for operation in shared-memory and distributed-memory environments where the processors are general purpose and execute their own independent instruction streams. Support for parallelism forms a fundamental part of Raven. To simplify the creation of parallelism Raven introduces the concepts of class-based and user-based parallelism. Class-based parallelism is parallelism created within a class and it is realized through early and delayed result. User-based parallelism results through the use of a class and is realized through companions and certificates. Raven also supplies automatic concurrency control, even across machine boundaries. Concurrency control is attached to an object through the more general property mechanism. Properties are a new way of supplying system services to objects on an individual object basis. Raven also introduces the notion of invoke streams which are a way for a third party to sequence invocation requests targeted at the same object. To demonstrate the viability of these ideas, an extensive implementation was performed. Raven runs on several different machines and operating systems including a 20 processor shared-memory machine. To demonstrate the usability of the parallel constructs, and the efficiency of the implementation, several parallel applications were written and performance measurements made. Included are implementations on shared-memory and distributed-memory machines that are identical except for a few lines of code specifying the system configuration. A distributed mail system is also presented to highlight the support for writing distributed applications.
H Μητρότητα ως Kενωτικό Γεγονός Ηθική, Kοινωνική και Παιδαγωγική Προσέγγιση
Creators: name: Στογιαννίδου, Ευστρατία Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Κένωση
Μητρότητα
Αγωγή
Emptying
Motherhood
Pedagogy

description: H παρούσα εργασία αποτελεί μια προσπάθεια να επισημανθεί η σύνδεση της θεολογίας της κένωσης του Χριστού με την κενωτική αγάπη της μητέρας. Αρχικά παρουσιάζεται η θεολογία της κένωσης του Χριστού, της Θεοτόκου και άλλων αγίων μητέρων. Η σύνδεση γίνεται με τη σύγχρονη μητέρα, η οποία καλείται μέσα από το έργο της ανατροφής και παιδαγωγίας των παιδιών της να μιμηθεί το κενωτικό πρότυπο του Χριστού. Η ανιδιοτελής προσφορά της ξεκινά ήδη από τη στιγμή της σύλληψης του εμβρύου εκδαπανάται και αυτόπροσφέρεται προς αύξηση του κυοφορούμενου. Η κενωτική προσφορά της διακρίνεται και στο έργο της διαπαιδαγώγησης˙ ένα ιδιαίτερο θέμα, η αγωγή στο δίπολο ελευθερίας-υπακοής. Πλάθει και προσφέρει στην κοινωνία ανεξάρτητες προσωπικότητες, ελεύθερους και ολοκληρωμένους ανθρώπους, πρόθυμους να ταυτίσουν τον θέλημά τους με το θέλημα του Θεού. Η κενωτική της πορεία αποτελεί συγχρόνως και τη «δόξα» της. Η θυσιαστική της αγάπη νοηματοδοτεί και δίνει πληρότητα στη ζωή της
description: This paper is an attempt to highlight the connection of Christ emptying theology with the emptying love of motherhood. At first, we present the emptying theology of Christ, the Virgin Mary and of other holy mothers. The connection is made with the contemporary mother, responsible for upbringing and the pedagogy of children to emulate Christ emptying. This selflessness starts from the moment of conception; it is spent and offered upbringing the unborn child. The emptying offering is distinctive in a pedagogy locale; a unique area, of nurturing on the freedom-obedience dipole. A mother forms and offers to the society a free and accomplished person, independent and willing to associate its wills to the will of God. The emptying process mother’s her "glory". Her sacrificial love gives her life meaning and fullness
Θρησκεία και Κοινωνικοποίηση στην Προσχολική Αγωγή. Κοινωνιολογική διερεύνηση
Creators: name: Αυλωνίτη, Ουρανία Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Προσχολική Εκπαίδευση και Αγωγή
Θρησκευτική Αγωγή
Απόψεις Νηπιαγωγών
Θεωρίες κοινωνικοποίησης
Ηθική ανάπτυξη
Θρησκευτική ανάπτυξη
ΔΕΠΠΣ-ΑΠΣ Νηπιαγωγείου
Διαπολιτισμική Εκπαίδευση
Early Childhood Education
Religious Education
Kindergarten Teachers’ Beliefs
Theories of Socialization
Ethical Development
Religious Development
Kindergarten Curriculum
Intercultural Education

description: Η παγκοσμιοποίηση της οικονομίας και του πολιτιστικού κεφαλαίου, η κοινωνία της γνώσης, η εκρηκτική ανάπτυξη της τεχνολογίας και η πολυπολιτισμικότητα συνθέτουν τις νέες ορίζουσες του εκπαιδευτικού οικοδομήματος και του θρησκευτικού προφίλ του σύγχρονου κόσμου. Λαμβάνοντας υπόψη τη σημερινή κοινωνικοικονομική και ηθική κρίση και την έξαρση εθνικιστικών φαινομένων, εγείρονται ερωτήματα και προβληματισμοί για τη θέση και την πορεία που διαδραματίζει η θρησκευτική αγωγή στην πρωτοβάθμια αλλά και στη δευτεροβάθμια εκπαίδευση. Η παρούσα διπλωματική διατριβή στοχεύει στο να αναδείξει και να διερευνήσει τη θέση της θρησκείας στην πρωτοβάθμια εκπαίδευση και ειδικότερα στην προσχολική εκπαίδευση και αγωγή, λαμβάνοντας υπόψη τη στάση και την εκπαιδευτική πρακτική των νηπιαγωγών της Κέρκυρας σε σχέση με τη θέση της θρησκευτικής αγωγής στο νηπιαγωγείο. Από την ανάλυση των ευρημάτων προέκυψε ότι οι εκπαιδευτικοί προσχολικής αγωγής εντάσσουν στον εκπαιδευτικό σχεδιασμό τους τη θρησκευτική αγωγή, λαμβάνοντας υπόψη της αρχές της διαπολιτισμικής εκπαίδευσης. Ωστόσο τα ευρήματα αποκαλύπτουν ότι οι εκπαιδευτικοί τείνουν να προβάλλουν και να διαχειρίζονται με μεγαλύτερη ένταση τα Ορθόδοξα χριστιανικά ήθη, έθιμα και παραδόσεις σε σχέση με τα αντίστοιχα άλλων θρησκειών
description: The globalization of economic and cultural capital, the society of information, the rapid technological progress, as well as multiculturalism, have formed a new educational and religious profile of the modern world. Considering the current social, economic and moral crisis and the uprising of far-rightism and racism, questions are being raised about the role of religious education in early childhood education. This study aims to investigate and to explore the knowledge, the beliefs and the teaching practices of Corfu’s kindergarten teachers regarding the role and the importance of religious education in early childhood education. The results indicate that the majority of the participants of this research think highly of the role of the religious education in early childhood education. Furthermore, based on the research findings, even though kindergarten teachers are taking into account the principles of intercultural education, their educational practice indicates that they display more intensely the Christian Orthodox customs and traditions, compared with those of other religions.
An Examination of the Correlation of Exploring Computer Science Course Performance and theDevelopment of Programming Expertise
Creators: name: McGee, Steven
name: Greenberg, Ron
name: McGee-Tekula, Randi
name: Duck, Jennifer
name: Rasmussen, Andrew
name: Dettori, Lucia
name: Reed, Dale
Publisher: name: University of Illinois at Chicago
Year: 2021
Subjects: Uncategorized

description: No description supplied
Mapping Organization Knowledge Network and Social Media Based Reputation Management
Creators: name: Alamsyah, Andry
name: Syawiluna, Maribella
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Economics (econ.GN)
subject: FOS: Economics and business

description: Knowledge management is an important aspect of an organization, especially in the ICT industry. Having more control of it is essentials for the organization to stay competitive in the business. One way to assess the organization's knowledge capital is by measuring employee knowledge networks and their personal reputation in social media. Using this measurement, we see how employees build relationships around their peer networks or clients virtually. We are also able to see how knowledge networks support organizational performance. The research objective is to map knowledge network and reputation formulation in order to fully understand how knowledge flow and whether employee reputation has a higher degree of influence in the organization's knowledge network. We particularly develop formulas to measure knowledge networks and personal reputation based on their social media activities. As a case study, we pick an Indonesian ICT company that actively build their business around their employee peer knowledge outside the company. For the knowledge network, we perform data collection by conducting interviews. For reputation management, we collect data from several popular social media. We base our work on Social Network Analysis (SNA) methodology. The result shows that employees' knowledge is directly proportional to their reputation, but there are different reputations level on different social media observed in this research.
description: 9 pages, 8 figues, 2 tables
Assessing the Effectiveness of Computer Science RPPs: The Case of CafeCS
Creators: name: Henrick, Erin
name: McGee, Steven
name: Greenberg, Ron
name: Dettori, Lucia
name: Rasmussen, Andrew
name: Yanek, Don
name: Reed, Dale
Publisher: name: University of Illinois at Chicago
Year: 2021
Subjects: Uncategorized

description: No description supplied
Volumes of highly twisted knots and links
Creators: name: Purcell, Jessica S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57M50, 57M25

description: We show that for a large class of hyperbolic knots and links, we can determine bounds on the volume of the link complement from combinatorial information given by a link diagram. Specifically, there is a universal constant C such that if a knot or link admits a prime, twist reduced diagram with at least 2 twist regions and at least C crossings per twist region, then the link complement is hyperbolic with volume bounded below by 3.3515 times the number of twist regions in the diagram. C is at most 113.
description: 14 pages, 4 figures. Minor changes to clarify exposition, fix typos, and correct a historical inaccuracy in the introduction. Paper has now appeared in AGT
Μελέτη και Επεξεργασία Top-k Ερωτημάτων Κυριαρχίας με Apache Spark
Creators: name: Οικονομίδης, Γεώργιος Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: ερωτήματα top-k κυριαρχίας
ανάλυση μεγάλων δεδομένων
Apache Spark
top-k dominating queries
big data analytics

description: Τα ερωτήματα top-k κυριαρχίας, τα οποία υπάγονται στην κατηγορία των ερωτημάτων προτίμησης, αποτελούν ένα πολύ ισχυρό εργαλείο για τον αναλυτή δεδομένων, καθώς του προσφέρουν έναν ευκολονόητο τρόπο εντοπισμού σημαντικών αντικειμένων μέσα σε ένα σύνολο δεδομένων. Ως εκ τούτου, αυτού του είδους τα ερωτήματατα βρίσκουν ευρεία ε- φαρμογή σε διάφορες περιοχές όπως υποστήριξη λήψης αποφάσεων, εξόρυξη δεδομένων, αναζήτηση στον ιστό και σε εφαρμογές πολυκριτηριακής ανάκτησης. Στην εποχή της πληροφορίας, όπου ο όγκος των δεδομένων συνεχώς αυξάνεται, οι υπάρχοντες σειρια- κοί αλγόριθμοι επεξεργασίας τέτοιων ερωτημάτων δεν μπορούν να ανταπεξέλθουν σε πραγματικά δεδομένα. Στην παρούσα εργασία προτείνεται ένας κατανεμημένος αλγόριθ- μος επεξεργασίας top-k ερωτημάτων κυριαρχίας, υλοποιημένος στο προγραμματιστικό περιβάλλον Apache Spark. Ο προτεινόμενος αλγόριθμος, στηριζόμενος σε έναν υπάρ- χων σειριακό, εκμεταλεύεται τη δύναμη του παραλληλισμού που προσφέρει το Spark και οδηγεί σε πολύ καλύτερους χρόνους εκτέλεσης
description: Top-k dominating queries, a type of preference-based queries, are a powerful tool to the data analyst, as they provide an intuitive way for finding significant objects in a dataset. As a result, they are widely used in decision support systems, data mining, web search and multi-criteria retrieval applications. In the era of information, where data size continuously grows, existing sequential algorithms that process those queries cannot cope with real-world data anymore. In this thesis, a distributed algorithm for processing top-k dominating queries, implemented in Apache Spark, is proposed. The proposed algorithm, based on an existing sequential one, utilizes the power of parallelism offered by Spark and delivers way faster execution times
Theory of the $sp-d$ coupling of transition metal impurities with free carriers in ZnO
Creators: name: Ciechan, Anna
name: Bogusławski, Piotr
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The $s,p-d$ exchange coupling between the spins of band carriers and of transition metal (TM) dopants ranging from Ti to Cu in ZnO is studied within the density functional theory. The $+U$ corrections are included to reproduce the experimental ZnO band gap and the dopant levels. The $p-d$ coupling reveals unexpectedly complex features. In particular, (i) the $p-d$ coupling constants $N_0β$ vary about 10 times when going from V to Cu, (ii) not only the value but also the sign of $N_0β$ depends on the charge state of the dopant, (iii) the $p-d$ coupling with the heavy holes and the light holes is not the same; in the case of Fe, Co and Ni, $N_0β$s for the two subbands can differ twice, and for Cu the opposite sign of the coupling is found for light and heavy holes. The main features of the $p-d$ coupling are determined by the $p-d$ hybridization between the $d$(TM) and $p$(O) orbitals. In contrast, the $s-d$ coupling constant $N_0α$ is almost the same for all TM ions, and does not depend on the charge state of the dopant. The TM-induced spin polarization of the $p$(O) orbitals contributes to the $s-d$ coupling, enhancing $N_0α$.
description: 16 pages, 11 figures, 1 table
Ηθική και πολιτική στο έργο «Κρίτων» του Πλάτωνα
Creators: name: Εξαρχος, Ιωάννης Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Πλάτων
Κρίτων
Ηθική και πολιτική
Platon
Criton
Ethics and politics

description: Στην παρούσα εργασία επιχειρείται μια φιλοσοφική προσέγγιση της σχέσης της Ηθικής με την Πολιτική γίνεται με βάση το έργο Κρίτων του Πλάτωνα. Στην εργασία παρουσιάζονται το ηθικό και πολιτικό βίωμα -και διακύβευμα- του Σωκράτη, καθώς επίσης η ηθική και πολιτική του παρακαταθήκη. Οφείλει ο πολίτης να υπακούει τους νόμους σε κάθε περίπτωση; Τι θα συμβεί αν οι πολίτες δεν υπακούσουν τους νόμους; Υπό ποιες προϋποθέσεις είναι δυνατή και αποδεκτή -αν πράγματι είναι- μια μορφή ανυπακοής των νόμων; Αποτελεί ή θα πρέπει να αποτελεί η πολιτική, τη βασική έκφανση της ηθικής; Ποια είναι η αληθινή σχέση της ηθικής με την πολιτική; Τα ερωτήματα αυτά τίθενται με έμμεσο ή άμεσο τρόπο στην παρούσα εργασία και επιχειρείται να δοθεί, όχι μία αληθοφανής απάντηση, αλλά η Πλατωνική φιλοσοφική προσέγγιση του ζητήματος, καθώς επίσης η φιλοσοφική προσέγγιση του συγγραφέα
description: Which is the relationship between Ethics and Politics on Plato’s Criton? Are citizens obligated to obey the city’s laws? What happens if citizens don’t obligate the city’s laws? Is Politics an other face of Ethics? Does Socrates obey to the Athens law or not? This Master Thesis presents a philosophical approach of Ethics and Politics on Plato’s Criton
Procurement of medicines to treat cancer, 2015–2020, China_Appendix
Creators: name: Pan, Mengyuan
name: Hu, Shuchen
name: Zhang, Jieqiong
name: Xiang, Cheng
name: Babar, Zaheer-Ud-Din
name: Yang, Caijun
Publisher: name: figshare
Year: 2022
Subjects: subject: 111204 Cancer Therapy (excl. Chemotherapy and Radiation Therapy)
subject: FOS: Clinical medicine

description: Some supplementary information and data files for the paper
Van der Waals Interactions in a Magneto-Dielectric Medium
Creators: name: Spagnolo, S.
name: Dalvit, D. A. R.
name: Milonni, P. W.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The van der Waals interaction between two ground-state atoms is calculated for two electrically or magnetically polarizable particles embedded in a dispersive magneto-dielectric medium. Unlike previous calculations which infer the atom-atom interaction from the dilute-medium limit of the macroscopic, many-body van der Waals interaction, the interaction is calculated directly for the system of two atoms in a magneto-dielectric medium. Two approaches are presented, the first based on the quantized electromagnetic field in a dispersive medium without absorption and the second on Green functions that allow for absorption. We show that the correct van der Waals interactions are obtained regardless of whether absorption in the host medium is taken into account.
description: 9 pages, 1 figure
Coarse-grained V-representability
Creators: name: Lammert, Paul E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The unsolved problem of determining which densities are ground state densities of an interacting electron system in some external potential is important to the foundations of density functional theory. A coarse-grained version of this ensemble V-representability problem is shown to be thoroughly tractable. Averaging the density of an interacting electron system over the cells of a regular partition of space produces a coarse-grained density. It is proved that every strictly positive coarse-grained density is coarse-grained ensemble V-representable: there is a unique potential, constant over each cell of the partition, which has a ground state with the prescribed coarse-grained density. For a system confined to a box, the (coarse-grained) Lieb [Intl. J. Quantum Chem. 24, 243 (1983)] functional is also shown to be Gateaux differentiable. All results extend to open systems.
description: 10 pages, no figures, revtex4. J Chem Phys official version at http://link.aip.org/link/?jcp/125/074114
Privacy Preference Signals: Past, Present and Future
Creators: name: Hils, Maximilian
name: Woods, Daniel W.
name: Böhme, Rainer
Publisher: name: arXiv
Year: 2021
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Privacy preference signals are digital representations of how users want their personal data to be processed. Such signals must be adopted by both the sender (users) and intended recipients (data processors). Adoption represents a coordination problem that remains unsolved despite efforts dating back to the 1990s. Browsers implemented standards like the Platform for Privacy Preferences (P3P) and Do Not Track (DNT), but vendors profiting from personal data faced few incentives to receive and respect the expressed wishes of data subjects. In the wake of recent privacy laws, a coalition of AdTech firms published the Transparency and Consent Framework (TCF), which defines an opt-in consent signal. This paper integrates post-GDPR developments into the wider history of privacy preference signals. Our main contribution is a high-frequency longitudinal study describing how TCF signal gained dominance as of February 2021. We explore which factors correlate with adoption at the website level. Both the number of third parties on a website and the presence of Google Ads are associated with higher adoption of TCF. Further, we show that vendors acted as early adopters of TCF 2.0 and provide two case-studies describing how Consent Management Providers shifted existing customers to TCF 2.0. We sketch ways forward for a pro-privacy signal.
Viscocapillary Instability in Cellular Spheroids
Creators: name: Martin, Matthieu
name: Risler, Thomas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Medical Physics (physics.med-ph)
subject: Tissues and Organs (q-bio.TO)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: We describe a viscocapillary instability that can perturb the spherical symmetry of cellular aggregates in culture, also called multicellular spheroids. In the condition where the cells constituting the spheroid get their necessary metabolites from the immediate, outer microenvironment, a permanent cell flow exists within the spheroid from its outer rim where cells divide toward its core where they die. A perturbation of the spherical symmetry induces viscous shear stresses within the tissue that can destabilise the aggregate. The proposed instability is viscocapillary in nature and does not rely on external heterogeneities, such as a pre-existing pattern of blood vessels or the presence of a substrate on which the cells can exert pulling forces. It arises for sufficiently large cell-cell adhesion strengths, cell-renewal rates, and metabolite supplies, as described by our model parameters. Since multicellular spheroids in culture are good model systems of small, avascular tumours, mimicking the metabolite concentration gradients found in vivo, we can speculate that our description applies to microtumour instabilities in cancer progression.
description: 22 pages, 5 figures. This is the manuscript version of an article accepted for publication in New Journal of Physics. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it
Does Exploring Computer Science Increase Computer Science Enrollment
Creators: name: McGee, Steven
name: McGee-Tekula, Randi
name: Duck, Jennifer
name: Dettori, Lucia
name: Yanek, Don
name: Rasmussen, Andrew
name: Greenberg, Ron
name: Reed, Dale
Publisher: name: University of Illinois at Chicago
Year: 2021
Subjects: Uncategorized

description: No description supplied
Collective coordinate model of kink-antikink collisions in $ϕ^4$ theory
Creators: name: Manton, N. S.
name: Oles, K.
name: Romanczukiewicz, T.
name: Wereszczynski, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The fractal velocity pattern in symmetric kink-antikink collisions in $ϕ^4$ theory is shown to emerge from a dynamical model with two effective moduli, the kink-antikink separation and the internal shape mode amplitude. The shape mode usefully approximates Lorentz contractions of the kink and antikink, and the previously problematic null-vector in the shape mode amplitude at zero separation is regularized.
description: the metric and potential of the effective model are now included
On the stellar clustering and architecture of planetary systems
Creators: name: Adibekyan, V.
name: Santos, N. C.
name: Demangeon, O. D. S.
name: Faria, J. P.
name: Barros, S. C. C.
name: Oshagh, M.
name: Figueira, P.
name: Mena, E. Delgado
name: Sousa, S. G.
name: Israelian, G.
name: Campante, T.
name: Hakobyan, A. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Revealing the mechanisms shaping the architecture of planetary systems is crucial for our understanding of their formation and evolution. In this context, it has been recently proposed that stellar clustering might be the key in shaping the orbital architecture of exoplanets. The main goal of this work is to explore the factors that shape the orbits of planets. We used a homogeneous sample of relatively young FGK dwarf stars with RV detected planets and tested the hypothesis that their association to phase space (position-velocity) over-densities ('cluster' stars) and under-densities ('field' stars) impacts the orbital periods of planets. When controlling for the host star properties, on a sample of 52 planets orbiting around 'cluster' stars and 15 planets orbiting around 'field' star, we found no significant difference in the period distribution of planets orbiting these two populations of stars. By considering an extended sample of 73 planets orbiting around 'cluster' stars and 25 planets orbiting 'field' stars, a significant different in the planetary period distributions emerged. However, the hosts associated to stellar under-densities appeared to be significantly older than their 'cluster' counterparts. This did not allow us to conclude whether the planetary architecture is related to age, environment, or both. We further studied a sample of planets orbiting 'cluster' stars to study the mechanism responsible for the shaping of orbits of planets in similar environments. We could not identify a parameter that can unambiguously be responsible for the orbital architecture of massive planets, perhaps, indicating the complexity of the issue. Conclusions. Increased number of planets in clusters and in over-density environments will help to build large and unbiased samples which will then allow to better understand the dominant processes shaping the orbits of planets.
description: Revised following Referee's comments. A&A
Φράκταλς-μελέτη των Julia sets πολυωνυμικών απεικονίσεων 2ου και 3ου βαθμού και απεικονίσεων της μεθόδου Newton-Raphson
Creators: name: Κοσμίδης, Σάββας Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Μορφοκλασματικά σύνολα
Επαναληπτική Απεικόνιση
Σύνολο Julia
Fractals
Iteration map
Julia Set

description: Στην παρούσα εργασία ασχολούμαστε με μια ιδιαίτερη οικογένεια των φράκταλς, τα λεγόμενα Julia Sets. Στο πρώτο κεφάλαιο ορίζουμε την έννοια της επαναληπτικής απεικόνισης και πραγματευόμαστε ορισμένες από τις γενικές της ιδιότητες. Στο δεύτερο κεφάλαιο εστιάζουμε στις πολυωνυμικές απεικονίσεις 2ου βαθμού και εισάγουμε τις έννοιες τoυ Παραμένοντος και Διαφεύγοντος συνόλου, όπως και την έννοια του Julia Set. Επίσης, αναπτύσσουμε αλγορίθμους για να σχεδιάσουμε τα Julia Sets. Στο τρίτο κεφάλαιο διαχωρίζουμε τα Julia Sets βάσει της συνεκτικότητάς τους και κατασκευάζουμε το σύνολο Mandelbrot. Επιπλέον, προσπαθούμε να κατανοήσουμε τη φύση των περιοδικών περιοχών του συνόλου Mandelbrot και να τις χρησιμοποιήσουμε σαν «οδηγό» για τα Julia Sets. Στη συνέχεια διερευνούμε μερικές αξιοσημείωτες ιδιότητες του συνόλου Mandelbrot χρησιμοποιώντας το διάγραμμα διακλαδώσεων και τον εκθέτη Lyapunov. Στο τρίτο κεφάλαιο ο σκοπός μας είναι να δείξουμε τη δυναμική κοντά σε rationally indifferent σταθερά σημεία και irrationally indifferent σταθερά σημεία. Στο πέμπτο κεφάλαιο μελετάμε τις πολυωνυμικές απεικονίσεις 3ου βαθμού (κυβικά πολυώνυμα) και τα αντίστοιχα Julia Sets. Επίσης, κατασκευάζουμε το Cubic Mandelbrot Set. Στο τελευταίο κεφάλαιο επεξηγούμε τα χαρακτηριστικά των Julia Sets της μεθόδου Newton-Raphson και τις ιδιότητες των polynomial-like απεικονίσεων
description: In this paper, we explore a special type of fractals, the so-called Julia Sets. In the first chapter we give the definition of the iteration sequence and discuss some of its general properties. In the second chapter we focus on the Basic Quadratic Family and introduce the terms of Escape Set, Keep Set and Julia Set. We also develop algorithms so as to plot Julia Sets. In the third chapter we classify the Julia Sets by connectedness and construct the Mandelbrot Set. Furthermore, we try to understand the nature of the periodic regions of the Mandelbrot Set and use them as a “road map” for the quadratic Julia Sets. Additionally, we explore some notable characteristics of the Mandelbrot Set by using the bifurcation diagram and Lyapunov Exponent. In the fourth chapter our aim is to show the dynamics near rationally and irrationally indifferent fixed points. In the fifth chapter we focus on cubic polynomials and the related Julia Sets. We also construct the Cubic Mandelbrot Set. In the last chapter we illustrate the characteristics of the Newton-Raphson Julia Sets and the properties of polynomial-like maps
Phase diagram of the spin-1 XXZ Heisenberg ferromagnet with a single-ion anisotropy
Creators: name: Strecka, Jozef
name: Dely, Jan
name: Canova, Lucia
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Phase diagram of the spin-1 quantum Heisenberg model with both exchange as well as single-ion anisotropy is constructed within the framework of pair approximation formulated as a variational procedure based on the Gibbs-Bogoliubov inequality. In this form adapted variational approach is used to obtain the results equivalent with the Oguchi's pair approximation. It is shown that the single-ion anisotropy induces a tricritical behaviour in the considered model system and a location of tricritical points is found in dependence on the exchange anisotropy strength.
description: 12 pages, 3 figures, preprint submitted to Chin. J. Phys
This is What Diversity Looks Like: Making ECS Culturally Relevant for Spanish-speaking Puerto Ricans
Creators: name: Carroll-Miranda, Joseph
name: Ordonez, Patricia
name: Edusmildo Orozco
name: Bravo, Milagros
name: Borrero, Michelle
name: Lopez, Luis
name: Gerriann Houser
name: Eliud Gerena
name: Reed, Dale
name: Santiago, Brenda
name: Corchado, Agustin
name: Andreshka Santana
Publisher: name: University of Illinois at Chicago
Year: 2021
Subjects: Uncategorized

description: No description supplied
Modes of a stellar system II: non-ergodic systems
Creators: name: Lau, Jun Yan
name: Binney, James
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: An equation is derived for the energy of a small disturbance in a system that is generated by a distribution function (DF) of the form $f(\vJ)$ -- most galaxies and star clusters can be closely approximated by such a DF. The theory of van Kampen modes is extended to such general systems. An inner product on the space of DFs is defined such that the energy of a disturbance is its norm under this product. It is shown that van Kampen modes that differ in frequency are then orthogonal, with the consequence that the energies of van Kampen modes are additive. Consequently, most of the insight into the dynamics of ergodic systems that was gained in a recent paper on the van Kampen modes of ergodic systems applies to real clusters and galaxies.
description: 6 pages, submitted to MNRAS
An Infrared Imaging Study of the Bipolar Proto-Planetary Nebula IRAS 16594-4656
Creators: name: Volk, Kevin
name: Hrivnak, Bruce J.
name: Su, Kate Y. L.
name: Kwok, Sun
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: High-resolution mid-infrared images have been obtained in N-band and Q-band for the proto-planetary nebula IRAS 16594-4656. A bright equatorial torus and a pair of bipolar lobes can clearly be seen in the infrared images. The torus appears thinner at the center than at the edges, suggesting that it is viewed nearly edge-on. The infrared lobes correspond to the brightest lobes of the reflection nebula seen in the Hubble Space Telescope (HST) optical image, but with no sign of the point-symmetric structure seen in the visible image. The lobe structure shows a close correspondence with a molecular hydrogen map obtained with HST, suggesting that the dust emission in the lobes traces the distribution of the shocked gas. The shape of the bipolar lobes shows clearly that the fast outflow is still confined by the remnant circumstellar envelope of the progenitor asymptotic giant branch (AGB) star. However, the non-detection of the dust outside of the lobes suggests that the temperature of the dust in the AGB envelope is too low for it to be detected at 20 microns.
description: Accepted by the Astrophysical Journal
Summarizing Online Conversation of Indonesia Tourism Industry using Network Text Analysis
Creators: name: Alamsyah, Andry
name: Shafira, Sheila
name: Yudhistira, Muhamad Alfin
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Economics (econ.GN)
subject: FOS: Economics and business

description: The tourism industry is one of the potential revenues and has an important role in economics in Indonesia. The tourism Industry brings job and business opportunities, foreign exchange earnings, and infrastructure development, tourism also plays the role of one of the main drivers in socio-economic progress in Indonesia. The number of foreign tourists visiting Indonesia increase cumulatively and has reached 10.41 million visits or an increase of 10.46 percent from the same period in the previous year. Government trying to increase the number of tourists to visit Indonesia by promoting many Indonesian tourist attractions.
description: 6 pages, 2 figures, 2 tables
On the Impact of Interpretability Methods in Active Image Augmentation Method
Creators: name: Santos, Flavio
name: Zanchettin, Cleber
name: Matos, Leonardo
name: Novais, Paulo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Robustness is a significant constraint in machine learning models. The performance of the algorithms must not deteriorate when training and testing with slightly different data. Deep neural network models achieve awe-inspiring results in a wide range of applications of computer vision. Still, in the presence of noise or region occlusion, some models exhibit inaccurate performance even with data handled in training. Besides, some experiments suggest deep learning models sometimes use incorrect parts of the input information to perform inference. Activate Image Augmentation (ADA) is an augmentation method that uses interpretability methods to augment the training data and improve its robustness to face the described problems. Although ADA presented interesting results, its original version only used the Vanilla Backpropagation interpretability to train the U-Net model. In this work, we propose an extensive experimental analysis of the interpretability method's impact on ADA. We use five interpretability methods: Vanilla Backpropagation, Guided Backpropagation, GradCam, Guided GradCam, and InputXGradient. The results show that all methods achieve similar performance at the ending of training, but when combining ADA with GradCam, the U-Net model presented an impressive fast convergence.
description: published in Logic Journal of the IGPL (2021)
The Ribbon-Like Hard X-Ray Emission in a Sigmoidal Solar Active Region
Creators: name: Liu, Chang
name: Lee, Jeongwoo
name: Gary, Dale E.
name: Wang, Haimin
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Solar flare emissions at Halpha and EUV/UV wavelengths often appear in the form of two ribbons, which has been regarded as evidence for a typical configuration of solar magnetic reconnection. However, such a ribbon structure has rarely been observed in hard X-rays (HXRs), although it is expected as well. In this letter, we report a ribbon-like HXR source observed with the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) at energies as high as 25-100 keV during the 2005 May 13 flare. For a qualitative understanding of this unusual HXR morphology, we also note that the source active region appeared in a conspicuous sigmoid shape before the eruption and changed to an arcade structure afterward as observed with the Transition Region and Coronal Explorer (TRACE) at 171 A. We suggest that the ribbon-like HXR structure is associated with the sigmoid-to-arcade transformation during this type of reconnection.
description: 4 pages, 4 figures, The Astrophysical Journal Letters, 2007, accepted
Multilevel quantum thermodynamic swap engines
Creators: name: Sacchi, Massimiliano F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study energetic exchanges and fluctuations in two-stroke quantum thermodynamic engines where the working fluid is represented by two multilevel quantum systems, i.e. qudits, the heat flow is allowed by relaxation with two thermal reservoirs at different temperatures, and the work exchange is operated by a partial-swap unitary interaction. We identify three regimes of operation (heat engine, refrigerator, and thermal accelerator), present the thermodynamic uncertainty relations between the entropy production and the signal-to-noise ratio of work and heat, and derive the full joint probability of the stochastic work and heat. Our results bridge the gap between two-qubit and two-mode bosonic swap engines, and show which properties are maintained (e.g., a non fluctuating Otto efficiency) and which are lost for increasing dimension (e.g., small violations of the standard thermodynamic uncertainty relations or the possibility of beating the Curzon-Ahlborn efficiency).
description: 14 pages, 8 figures; improved and accepted version
The $SL(2,\mathbb{C}) character variety ofa class of torus knots
Creators: name: Oller, Antonio M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Geometric Topology (math.GT)
subject: Algebraic Topology (math.AT)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 57M27

description: In this paper we present some families of polynomials and use them to find, using the techniques in \cite{gma}, a defining polynomial for the $SL(2,\mathbb{C})$ character variety (as defined in \cite{cus}) of the torus knots of type $(m,2)$ with $m>1$ being an odd integer.