cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Collinder 135 and UBC 7: A Physical Pair of Open Clusters
Creators: name: Kovaleva, Dana
name: Ishchenko, Marina
name: Postnikova, Ekaterina
name: Berczik, Peter
name: Piskunov, Anatoly E.
name: Kharchenko, Nina V.
name: Polyachenko, Evgeny
name: Reffert, Sabine
name: Sysoliatina, Kseniia
name: Just, Andreas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Given the closeness of the two open clusters Cr 135 and UBC 7 on the sky, we investigate the possibility of the two clusters to be physically related. We aim to recover the present-day stellar membership in the open clusters Collinder 135 and UBC 7 (300 pc from the Sun), to constrain their kinematic parameters, ages and masses, and to restore their primordial phase space configuration. The most reliable cluster members are selected with our traditional method modified for the use of Gaia DR2 data. Numerical simulations use the integration of cluster trajectories backwards in time with our original high order Hermite4 code \PGRAPE. We constrain the age, spatial coordinates and velocities, radii and masses of the clusters. We estimate the actual separation of the cluster centres equal to 24 pc. The orbital integration shows that the clusters were much closer in the past if their current line-of-sight velocities are very similar and the total mass is more than 7 times larger the mass of the determined most reliable members. We conclude that the two clusters Cr 135 and UBC 7 might very well have formed a physial pair, based on the observational evidence as well as numerical simulations. The probability of a chance coincidence is only about $2\%$.
description: Accepted for publication as a Letter in Astronomy and Astrophysics. 5 pages, 2 figures
Determining the unitarity triangle angle $γ$ with a four-body amplitude analysis of $\rm B^\pm \to (K^+K^-π^+π^-)_D K^\pm$ decays
Creators: name: Rademacker, J.
name: Wilkinson, G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We explain how a four-body amplitude analysis of the $\rm D$ decay products in the mode $\rm B^\pm \to (K^+K^-π^+π^-)_D K^\pm$ is sensitive to the unitarity triangle angle $γ$. We present results from simulation studies which show that a precision on $γ$ of $15^\circ$ is achievable with 1000 events and assuming a value of 0.10 for the parameter $r_B$.
description: 8 pages, 3 figures. (This version has bug in equation 4 fixed, and minor modification to references.)
What ever happened to liberal feminism? : a discussion of the contribution of libral feminism to international relations theory
Creators: name: Sindle, Jenna
Publisher: name: University of British Columbia
Year: 2009

description: International relations, as a theoretical and practical subfield of political science, has recently been the subject of much criticism due to the apparent hostility of the dominant realist paradigm toward the incorporation of feminist inquiry. Recently, in light of changes brought about by the end of the Cold War, alternative ways of thinking and theorizing about international relations have found avenues of entry into the central debates. Despite the presentation of feminist inquiry as a coherent theoretical perspective, it is more adequately conceptualized as a fractured discourse. The prevailing interpretation of of feminist international relations theory has been captured by radical feminism to the exclusion of all other perspectives. Despite its current credibility, it is suggested that the radical critique is fundamentally limited. In seeking alternative approaches to the development of feminist international relations theory it has been suggested that a liberal feminist interpretation may provide a more adequate theoretical foundation. What is at stake in pursuing a reconstruction of liberal feminism in international relations is whether ideas such as the division between public and private space, the empirical foundation of knowledge and the gender neutrality of institutions like the division of public and private space can sufficiently represent the interests of women without being co-opted into the mainstream of theoretical inquiry. This thesis argues that liberal feminism makes only a very limited contribution to the study of international relations theory. In its predilection for continuity over destabilization and description over analysis, liberal feminism analysis fails to embrace a critical perspective on gender inequality in the international system. It is only by broadening the scope of its discussion, in understanding gender as a description of an unequal power relationship created and sustained by the structure of social, political, and economic institutions, instead of a more functionally defined inequality, that a liberal feminist perspective could be legitimately included within the scope of international relations theory, This task would, however, appear to be an inherent feature of the contradictory relationship between liberal and feminist theories and, in all probability, is a fundamentally irreconcilable tension.
An analytical decomposition protocol for optimal implementation of two-qubit entangling gates
Creators: name: Blaauboer, M.
name: de Visser, R. L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: This paper addresses the question how to implement a desired two-qubit gate U using a given tunable two-qubit entangling interaction H_int. We present a general method which is based on the K_1 A K_2 decomposition of unitary matrices in SU(4) to calculate analytically the smallest number of two-qubit gates U_int [based on H_int] and single-qubit rotations, and the explicit sequence of these operations that are required to implement U. We illustrate our protocol by calculating the implementation of (1) the transformation from standard basis to Bell basis, (2) the CNOT gate, and (3) the quantum Fourier transform for two kinds of interaction - Heisenberg exchange interaction and quantum inductive coupling - and discuss the relevance of our results for solid-state qubits.
description: 16 pages, published version
The imaginary part of the gap function in color superconductivity
Creators: name: Feng, Bo
name: Hou, Defu
name: Li, Jiarong
name: Ren, Hai-cang
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We clarify general properties of the energy gap regarding its functional dependence on the energy-momentum dictated by the invariance under a space inversion or a time reversal. Then we derive perturbatively the equation of the imaginary part of the gap function for dense QCD in weak coupling and generalize our results from 2SC case to CFL case. We confirm that the imaginary part is down by $g$ relative to the real part in weak coupling. The numerical results show that, up to the leading order, the imaginary part is no larger than one MeV at extremely large densities and can be as large as several MeV the densities are of physical interest.
description: 15 pages, 2 figures, typos corrected, a figure replaced. The version to be appeared in Nucl.Phys. B
Ο πατριάρχης Κύριλλος και η ανύψωση της Εκκλησίας της Βουλγαρίας στην πατριαρχική περιωπή
Creators: name: Chakarov, Miroslav, Mircho (Τσακάροβ Μιροσλάβ)
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Πατριάρχης Κύριλλος
Βουλγαρική Εκκλησία
Patriarch Cyril
Bulgarian Church

description: Ο Πατριάρχης Βουλγαρίας Κύριλλος είναι ο πρώτος πατριάρχης μετά την αποκατάσταση του Βουλγαρικού Πατριαρχείου, γεγονός που πραγματοποιείται στις 10 Μαΐου του 1953. Η ποιμεναρχία του συνεχίζει μέχρι τις 7 Μαρτίου του 1971- η ημέρα της μεταφοράς του στον Κύριο. Η αρχιερατική δραστηριότητα του Πατριάρχη Κυρίλλου διαβαίνει κάτω από το σημείο της αθεϊστικής κομουνιστικής εξουσίας που εγκατασταίνεται στην χώρα στις 9 Σεπτεμβρίου του 1945. Στις σχέσεις της Εκκλησίας με την βουλγαρική κυβέρνηση ο Πατριάρχης πολλές φορές αναγκάζεται να κάνει διάφορες αποχωρίσεις και συμβιβασμούς και όλα στο όνομα της ειρήνης και της ελευθερίας της ορθοδόξου ομολογίας στην χώρα. Εκτός από εξαιρετικός ηγέτης της Βουλγαρικής Εκκλησίας και ενεργός κοινωνικός παράγων, ο Πατριάρχης Κύριλλος είναι και διακεκριμένος ιστορικός, ο οποίος έχει αφήσει ένα μεγάλο σε έκταση και περιεχόμενο επιστημονικό έργο. Το βασικό μέρος της μελέτης του βασίζεται πάνω σε καινούργια έγγραφα, τα οποία ο Πατριάρχης Κύριλλος ανακαλύπτει σε διάφορα αρχειοφυλάκια της Βουλγαρίας και του εξωτερικού. Το πρωτότυπο έργο του έχει αξιόλογη αναφορά, κυρίως, στη μελέτη της βουλγαρικής Αναγέννησης. Από τις 8 μέχρι τις 10 Μαΐου 1953 στην Σόφια διενεργείται η ιστορική Γ’ Κληρικολαϊκή Συνέλευση. Κατά τη διάρκεια της Συνέλευσης επικυρώνεται η πατριαρχική περιωπή της Βουλγαρικής Εκκλησίας, ενώ εκλέγεται, επίσης, ο Πρωτοστάτης της - η Α. Μακαριότης, ο Пατριάρχης Σόφιας και πάσης Βουλγαρίας κ. κ. Κύριλλος.
description: Patriarch Cyril of Bulgaria was the first Patriarch after the restoration of the Bulgarian Patriarchate on 10 May 1953. Patriarch Cyril held this position until his death – 7 March 1971. His activity as Patriarch was carried out under the conditions of the atheistic communist regime in Bulgaria, established on 9 September 1944. The circumstances forced the Bulgarian Patriarch to make a number of concessions and compromises in the relations between the Church and the Bulgarian government – all of which were in the name of the peace and freedom of the Eastern Orthodox denomination in Bulgaria.Apart from being an exceptional leader of the Bulgarian Church and an active public figure, Patriarch Cyril was an eminent scholar and historian who left behind himself a great scientific work in both volume and content.The main part of his work was based on new documents that Patriarch Cyril had found in various foreign archive depositories. His original work has had an outstanding contribution to the study of the Bulgarian Renaissance.The historical Third Council of the Church and was convened in Sofia from 8 to 10 May 1953. During the Council, the Patriarchal dignity of the Bulgarian Church was restored and the first Patriarch was elected – His Holiness Patriarch Cyril of Bulgaria.
On the Generation of Electronic Ring Currents under Vibronic Coupling Effects
Creators: name: Nandipati, Krishna R.
name: Vendrell, Oriol
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We study the generation of electronic ring currents in the presence of nonadiabatic coupling using circularly polarized light. For this, we introduce a solvable model consisting of an electron and a nucleus rotating around a common center and subject to their mutual Coulomb interaction. The simplicity of the model brings to the forefront the non-trivial properties of electronic ring currents in the presence of coupling to the nuclear coordinates and enables the characterization of various limiting situations transparently. Employing this model, we show that vibronic coupling effects play a crucial role even when a single $E$ degenerate eigenstate of the system supports the current. The maximum current of a degenerate eigenstate depends on the strength of the nonadiabatic interactions. In the limit of large nuclear to electronic masses, in which the Born-Oppenheimer approximation becomes exact, constant ring currents and time-averaged oscillatory currents necessarily vanish.
description: 9 pages, 3 figures
Yaşlılarda Ağrısız Servikal Kırık
Creators: name: Erkman SANRI
Publisher: name: Zenodo
Year: 2017

description: Travma hastalarının yönetiminde, hastayı ilk değelendiren hekimler olarak acil servis hekimlerinin rolü oldukça önemli. Hastanın hemodinamik stabilitesinin sağlanmasının yanı sıra, mevcut patolojinin ivedilikle tanınması ve yönetimi de yine acil servis hekimlerinin görev tanımlamaları arasında. Yoğun acil servislerde, hangi travma hastasının öncelikli olduğuna, hangisinin görüntüleme ihtiyacı olduğuna veya hangisinin sadece gözlem ihtiyacı olduğuna karar vermek, bazen sandığımızdan zor olabilmekte. Ancak zamanla yarışılan travma hastası yönetimi sürecinde bu kararları doğru ve hızlı bir şekilde vermek hem hasta hem de hekim için olmazsa olmaz bir durum. Travma hastalarında servikal görüntüleme ihtiyacı belirlemede en sık kullanılan skorlama sistemleri; NEXUS ve KANADA skorlama sistemleridir. KANADA kriterlerinin kullanımı daha çok önerilmektedir. KANADA kriterlerinin herhangi birinin varlığında hastada görüntüleme önerilmektedir. Yine sık kullanılan NEXUS kriterlerinin ise hiçbirisinin olmaması durumunda görüntüleme yapılmaması önerilmektedir. Birçok klinisyen hata payını minimuma indirmek için, bu iki skorlama sistemi kombine etmektedir ki bu önerilmeyen bir uygulamadır. Çünkü bu iki skorlama sistemi, tamamiyle farklı hedef ve metodolojilerle yapılmış çalışmaların verilerine göre belirlenmiş skorlama sistemleridir. Birisi (NEXUS) hangi hastada görüntülemeye gerek olmadığı, diğeri ise hangi hastada görüntüleme yapılması gerektiği kararları üzerine sistemlerdir.
Nuclear transparencies from photoinduced pion production
Creators: name: Cosyn, W.
name: Martinez, M. C.
name: Ryckebusch, J.
name: Van Overmeire, B.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present a relativistic and cross-section factorized framework for computing nuclear transparencies extracted from A(γ,πN) reactions at intermediate energies. The proposed quantummechanical model adopts a relativistic extension to the multiple-scattering Glauber approximation to account for the final state interactions of the ejected nucleon and pion. The theoretical predictions are compared against the experimental ^4He(γ,p π^-) data from Jefferson Lab. For those data, our results show no conclusive evidence for the onset of mechanisms related to color transparency.
description: 5 pages, 3 figures
A Search for wide visual companions of exoplanet host stars - The Calar Alto Survey
Creators: name: Mugrauer, Markus
name: Neuhaeuser, R.
name: Mazeh, T.
name: Guenther, E.
name: Fernandez, M.
name: Broeg, C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have carried out a search for co-moving stellar and substellar companions around 18 exoplanet host stars with the infrared camera MAGIC at the 2.2m Calar Alto telescope, by comparing our images with images from the all sky surveys 2MASS, POSS I and II. Four stars of the sample namely HD80606, 55Cnc, HD46375 and BD-103166, are listed as binaries in the Washington Visual Double Star Catalogue (WDS). The binary nature of HD80606, 55Cnc, and HD46375 is confirmed with both astrometry as well as photometry, thereby the proper motion of the companion of HD46375 was determined here for the first time. We derived the companion masses as well as the longterm stability regions for additional companions in these three binary systems. We can rule out further stellar companions around all stars in the sample with projected separations between 270AU and 2500AU, being sensitive to substellar companions with masses down to \~60MJup (S/N=3). Furthermore we present evidence that the two components of the WDS binary BD-103166 are unrelated stars, i.e this system is a visual pair. The spectrophotometric distance of the primary (a K0 dwarf) is ~67pc, whereas the presumable secondary BD-103166B (a M4 to M5 dwarf) is located at a distance of 13pc in the foreground.
description: accepted for publication in AN, 7 pages, 4 figures
title: Paper 1 of the MindMINT study: Digital mindset intervention to boost students' STEM mindsets
Creators: name: Karlen, Yves
name: Maria-Luisa Schmitz
name: Wohlfender, Bettina
name: Compagnoni, Miriam
Publisher: name: OSF Registries
Year: 2024
Subjects: subject: Educational Psychology
subject: Education

description: This study aims to foster a positive mindset among students, with a particular focus on encouraging female participation in Science, Technology, Engineering, and Mathematics (STEM) fields. To achieve this, we have developed a novel digital mindset intervention designed to enhance students' confidence and resilience when facing academic challenges in STEM subjects. The intervention is being tested with lower secondary school students, providing valuable insights into its effectiveness at this critical stage of their educational development.
Theta dependence of SU(N) gauge theories in the presence of a topological term
Creators: name: Vicari, Ettore
name: Panagopoulos, Haralambos
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We review results concerning the theta dependence of 4D SU(N) gauge theories and QCD, where theta is the coefficient of the CP-violating topological term in the Lagrangian. In particular, we discuss theta dependence in the large-N limit. Most results have been obtained within the lattice formulation of the theory via numerical simulations, which allow to investigate the theta dependence of the ground-state energy and the spectrum around theta=0 by determining the moments of the topological charge distribution, and their correlations with other observables. We discuss the various methods which have been employed to determine the topological susceptibility, and higher-order terms of the theta expansion. We review results at zero and finite temperature. We show that the results support the scenario obtained by general large-N scaling arguments, and in particular the Witten-Veneziano mechanism to explain the U(1)_A problem. We also compare with results obtained by other approaches, especially in the large-N limit, where the issue has been also addressed using, for example, the AdS/CFT correspondence. We discuss issues related to theta dependence in full QCD: the neutron electric dipole moment, the dependence of the topological susceptibility on the quark masses, the U(1)_A symmetry breaking at finite temperature. We also consider the 2D CP(N) model, which is an interesting theoretical laboratory to study issues related to topology. We review analytical results in the large-N limit, and numerical results within its lattice formulation. Finally, we discuss the main features of the two-point correlation function of the topological charge density.
description: A typo in Eq. (3.9) has been corrected. An additional subsection (5.2) has been inserted to demonstrate the nonrenormalizability of the relevant theta parameter in the presence of massive fermions, which implies that the continuum (a -> 0) limit must be taken keeping theta fixed
Network-Based Marketing: Identifying Likely Adopters via Consumer Networks
Creators: name: Hill, Shawndra
name: Provost, Foster
name: Volinsky, Chris
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: Network-based marketing refers to a collection of marketing techniques that take advantage of links between consumers to increase sales. We concentrate on the consumer networks formed using direct interactions (e.g., communications) between consumers. We survey the diverse literature on such marketing with an emphasis on the statistical methods used and the data to which these methods have been applied. We also provide a discussion of challenges and opportunities for this burgeoning research topic. Our survey highlights a gap in the literature. Because of inadequate data, prior studies have not been able to provide direct, statistical support for the hypothesis that network linkage can directly affect product/service adoption. Using a new data set that represents the adoption of a new telecommunications service, we show very strong support for the hypothesis. Specifically, we show three main results: (1) ``Network neighbors''--those consumers linked to a prior customer--adopt the service at a rate 3--5 times greater than baseline groups selected by the best practices of the firm's marketing team. In addition, analyzing the network allows the firm to acquire new customers who otherwise would have fallen through the cracks, because they would not have been identified based on traditional attributes. (2) Statistical models, built with a very large amount of geographic, demographic and prior purchase data, are significantly and substantially improved by including network information. (3) More detailed network information allows the ranking of the network neighbors so as to permit the selection of small sets of individuals with very high probabilities of adoption.
description: Published at http://dx.doi.org/10.1214/088342306000000222 in the Statistical Science (http://www.imstat.org/sts/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Perturbation of complex polynomials and normal operators
Creators: name: Rainer, Armin
Publisher: name: arXiv
Year: 2006
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 26C10; 30C15; 47A55; 47A56

description: We study the regularity of the roots of complex monic polynomials $P(t)$ of fixed degree depending smoothly on a real parameter $t$. We prove that each continuous parameterization of the roots of a generic $C^\infty$ curve $P(t)$ (which always exists) is locally absolutely continuous. Generic means that no two of the continuously chosen roots meet of infinite order of flatness. Simple examples show that one cannot expect a better regularity than absolute continuity. This result will follow from the proposition that for any $t_0$ there exists a positive integer $N$ such that $t \mapsto P(t_0\pm (t-t_0)^N)$ admits smooth parameterizations of its roots near $t_0$. We show that $C^n$ curves $P(t)$ (where $n = °P$) admit differentiable roots if and only if the order of contact of the roots is $\ge 1$. We give applications to the perturbation theory of normal matrices and unbounded normal operators with compact resolvents and common domain of definition: The eigenvalues and eigenvectors of a generic $C^\infty$ curve of such operators can be arranged locally in an absolutely continuous way.
description: 15 pages, small corrections, accepted for publication in Math. Nach
General relativity, differential geometry, and unitary theories in the work of Mira Fernandes
Creators: name: Lemos, José P. S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: History and Overview (math.HO)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: An analysis of the work of Mira Fernandes on unitary theories is presented.
description: 3 pages
Estimation of gravity variations at absolute stations in the Czech Republic from measurements compatible with ITGRS
Creators: name: Pálinkáš, Vojtech
Publisher: name: Zenodo
Year: 2025
Subjects: gravimetry
absolute gravimeter

description: Absolute gravity measurements with the FG5-215 and FG5X-251 gravimeters have been repeatedly conducted in the Czech Republic since 2001. At the same period, the gravimeters regularly took part at 12 international comparisons of absolute gravimeters and the gravity reference function at the reference station Pecný has been continuously maintained through the combination of absolute measurements with the measurements of the superconducting gravimeter OSG-050. The absolute gravity measurements in the Czech gravity network have been significantly extended since 2020 aiming to determine gravity variations at the stations, focusing on seasonal variations. These measurements have already been realized under the scope of CIPM MRA with declared uncertainty of 2.2 µGal. This uncertainty has been reached thanks to extensive investigation of systematic effects, enhanced measurement techniques and data re-processing. On the example of relevant data sets and investigations, we are presenting our approach to reach gravity results fully compatible with ITGRS, which could be characterized by exceptional accuracy with possibility to validate the measurement consistency and also to estimate the gravity variations mainly due to hydrological effects.
Theory and Applications of Financial Chaos Index
Creators: name: Ataei, Masoud
name: Chen, Shengyuan
name: Yang, Zijiang
name: Peyghami, M. Reza
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Finance (q-fin.ST)
subject: Applications (stat.AP)
subject: FOS: Economics and business
subject: FOS: Computer and information sciences

description: We develop a new stock market index that captures the chaos existing in the market by measuring the mutual changes of asset prices. This new index relies on a tensor-based embedding of the stock market information, which in turn frees it from the restrictive value- or capitalization-weighting assumptions that commonly underlie other various popular indexes. We show that our index is a robust estimator of the market volatility which enables us to characterize the market by performing the task of segmentation with a high degree of reliability. In addition, we analyze the dynamics and kinematics of the realized market volatility as compared to the implied volatility by introducing a time-dependent dynamical system model. Our computational results which pertain to the time period from January 1990 to December 2019 imply that there exist a bidirectional causal relation between the processes underlying the realized and implied volatility of the stock market within the given time period, where it is shown that the later has a stronger causal effect on the former as compared to the opposite. This result connotes that the implied volatility of the market plays a key role in characterization of the market's realized volatility.
INDICATORS FOR DETERMINING THE MOTIVATION OF SOCIAL WORKERS
Creators: name: Munira Juraevna Makhmudova, Ph.D. candidate in the Department of Social Work, National University of Uzbekistan
Publisher: name: Zenodo
Year: 2024

description: The social protection system plays a crucial role in ensuring the social stability of any society. The effectiveness of this system primarily depends on the work efficiency and motivation of the social workers involved. As President Shavkat Mirziyoyev emphasized in his speeches: "Our main task is to ensure the social protection and well-being of people. For this, it is necessary to appreciate the work and importance of social workers."

Identifying and enhancing the motivation of social workers is a pressing issue not only in Uzbekistan but also worldwide. Various countries and international organizations are striving to implement effective measures in this regard. By leveraging international research and experiences, we can develop effective mechanisms to improve the motivation of social workers in our context as well.
High-energy effective theory for orbifold branes
Creators: name: Shiromizu, Tetsuya
name: Fujii, Shunsuke
name: de Rham, Claudia
name: Yoshino, Hirotaka
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We derive an effective theory on the orbifold branes of the Randall-Sundrum 1 (RS1) braneworld scenario in the presence of a bulk brane. We concentrate on the regime where the three branes are close and consider a scenario where the bulk brane collides with one of the orbifold branes. This theory allows us to understand the corrections to a low-energy approach due to the presence of higher velocity terms, coming from the Kaluza-Klein modes. We consider the evolution of gravitational waves on a cosmological background and find that, within the large velocity limit, the boundary branes recover a purely four-dimensional behavior.
description: 4 pages, accepted for publication in Phys. Rev. D
The Imker Case Study - Practice with the Bee-Up Tool
Creators: name: Karagiannis, Dimitris
name: Burzynski, Patrik
name: Miron, Elena-Teodora
Publisher: name: Zenodo
Year: 2017
Subjects: conceptual modelling
BPMN
UML
ER
EPC
Petri Nets

description: Conceptual modelling is a technique which is essential for building enterprise information systems. The reason is not only because software systems have to be built, but also since domain specific requirements coming from the application area should be represented adequately. For this reason different modelling languages for data modelling, process modelling and systems modelling are developed. In this case study we deal with the fundamental conceptual modelling languages, like BPMN, EPC, ER, UML and Petri Nets. A tool support through Bee-Up is also given (www.omilab.org). This case study focuses on the domain of beekeeping throughout different areas, like the production of honey, bees in general and beekeepers (called Imker in German).
Magnetic shielding properties of high-temperature superconducting tubes subjected to axial fields
Creators: name: Denis, Samuel
name: Dusoulier, Laurent
name: Dirickx, Michel
name: Vanderbemden, Philippe
name: Cloots, Rudi
name: Ausloos, Marcel
name: Vanderheyden, Benoit
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We have experimentally studied the magnetic shielding properties of a cylindrical shell of BiPbSrCaCuO subjected to low frequency AC axial magnetic fields. The magnetic response has been investigated as a function of the dimensions of the tube, the magnitude of the applied field and the frequency. These results are explained quantitatively by employing the method of Brandt (1998 Phys. Rev. B 58 6506) with a Jc(B) law appropriate for a polycrystalline material. Specifically, we observe that the applied field can sweep into the central region either through the thickness of the shield or through the opening ends, the latter mechanism being suppressed for long tubes. For the first time, we systematically detail the spatial variation of the shielding factor (the ratio of the applied field over the internal magnetic field) along the axis of a high-temperature superconducting tube. The shielding factor is shown to be constant in a region around the centre of the tube, and to decrease as an exponential in the vicinity of the ends. This spatial dependence comes from the competition between two mechanisms of field penetration. The frequency dependence of the shielding factor is also discussed and shown to follow a power law arising from the finite creep exponent n.
description: 22 pages, 10 figures
The Fourier spectrum of critical percolation
Creators: name: Garban, Christophe
name: Pete, Gábor
name: Schramm, Oded
Publisher: name: arXiv
Year: 2008
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 82C43, 60K35, 42B05

description: Consider the indicator function $f$ of a two-dimensional percolation crossing event. In this paper, the Fourier transform of $f$ is studied and sharp bounds are obtained for its lower tail in several situations. Various applications of these bounds are derived. In particular, we show that the set of exceptional times of dynamical critical site percolation on the triangular grid in which the origin percolates has dimension 31/36 a.s., and the corresponding dimension in the half-plane is 5/9. It is also proved that critical bond percolation on the square grid has exceptional times a.s. Also, the asymptotics of the number of sites that need to be resampled in order to significantly perturb the global percolation configuration in a large square is determined.
description: 99 pages. In Section 4.4 of the published version, MathSciNet reviewer Antal J\'arai discovered some mistakes, which are corrected in this version
Hybrid Epidemics - A Case Study on Computer Worm Conficker
Creators: name: Zhang, Changwang
name: Zhou, Shi
name: Chain, Benjamin M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cryptography and Security (cs.CR)
subject: Artificial Intelligence (cs.AI)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Conficker is a computer worm that erupted on the Internet in 2008. It is unique in combining three different spreading strategies: local probing, neighbourhood probing, and global probing. We propose a mathematical model that combines three modes of spreading, local, neighbourhood and global to capture the worm's spreading behaviour. The parameters of the model are inferred directly from network data obtained during the first day of the Conifcker epidemic. The model is then used to explore the trade-off between spreading modes in determining the worm's effectiveness. Our results show that the Conficker epidemic is an example of a critically hybrid epidemic, in which the different modes of spreading in isolation do not lead to successful epidemics. Such hybrid spreading strategies may be used beneficially to provide the most effective strategies for promulgating information across a large population. When used maliciously, however, they can present a dangerous challenge to current internet security protocols.
Nonuniform Spin Triplet Superconductivity due to Antisymmetric Spin-Orbit Coupling in Noncentrosymmetric Superconductor CePt$_3$Si
Creators: name: Tanaka, Hiroko
name: Kaneyasu, Hirono
name: Hasegawa, Yasumasa
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We show that the nonuniform state (Fulde-Ferrel-Larkin-Ovchinnikov (FFLO) state) of the spin triplet superconductivity in noncentrosymmetric systems is stabilized by antisymmetric spin-orbit coupling even if the magnetic field is absent. The transition temperature of the spin triplet superconductivity is reduced by the antisymmetric spin-orbit coupling in general. This pair breaking effect is shown to be similar to the Pauli pair breaking effect due to magnetic field for the spin singlet superconductivity, in which FFLO state is stabilized near the Pauli limit (or Chandrasekhar-Clogston limit) of external magnetic field. Since there are gapless excitations in nonuniform superconducting state, some physical quantities such as specific heat and penetration depth should obey the power low temperature-dependences. We discuss the possibility of the realization of nonuniform state in CePt$_3$Si.
description: 8 pages, 6 figures
Winding up a finite size holographic superconducting ring beyond Kibble-Zurek mechanism
Creators: name: Xia, Chuan-Yin
name: Zeng, Hua-Bi
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We studied the dynamics of the order parameter and the winding numbers $W$ formation of a quenched normal-to-superconductor state phase transition in a finite size holographic superconducting ring. There is a critical circumference $\tilde{C}$ below it no winding number will be formed, then $\tilde{C}$ can be treated as the Kibble-Zurek mechanism (KZM) correlation length $ξ$ which is proportional to the fourth root of its quench rate $τ_Q$, which is also the average size of independent pieces formed after a quench. When the circumference $C \geq 10 ξ$, the key KZM scaling between the average value of absolute winding number and the quench rate $\langle|W|\rangle \propto τ_Q^{-1/8}$ is observed. At smaller sizes, the universal scaling will be modified, there are two regions. The middle size $5ξ
description: 8 pages, 6 figures
Light-cone sum rules for the $NγΔ$ transitions for real photons
Creators: name: Rohrwild, J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We examine the radiative $Δ\to γN$ transition at the real photon point $Q^2=0$ using the framework of light-cone QCD sum rules. In particular, the sum rules for the transition form factors $G_M(0)$ and $R_{EM}$ are determined up to twist 4. The result for $G_M(0)$ agrees with experiment within 10% accuracy. The agreement for $R_{EM}$ is also reasonable. In addition, we derive new light-cone sum rules for the magnetic moments of nucleons, with a complete account of twist-4 corrections based on a recent reanalysis of photon distribution amplitudes.
description: 34 pages, 9 figures, revised version, published in Phys. Rev. D, one misplaced reference corrected
Optimizing Hybrid Spreading in Metapopulations
Creators: name: Zhang, Changwang
name: Zhou, Shi
name: Miller, Joel C.
name: Cox, Ingemar J.
name: Chain, Benjamin M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Artificial Intelligence (cs.AI)
subject: Social and Information Networks (cs.SI)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: Epidemic spreading phenomena are ubiquitous in nature and society. Examples include the spreading of diseases, information, and computer viruses. Epidemics can spread by local spreading, where infected nodes can only infect a limited set of direct target nodes and global spreading, where an infected node can infect every other node. In reality, many epidemics spread using a hybrid mixture of both types of spreading. In this study we develop a theoretical framework for studying hybrid epidemics, and examine the optimum balance between spreading mechanisms in terms of achieving the maximum outbreak size. We show the existence of critically hybrid epidemics where neither spreading mechanism alone can cause a noticeable spread but a combination of the two spreading mechanisms would produce an enormous outbreak. Our results provide new strategies for maximising beneficial epidemics and estimating the worst outcome of damaging hybrid epidemics.
Probing the Warm-Hot Circumgalactic Medium with broad OVI and X-rays
Creators: name: Mathur, Smita
name: Gupta, Anjali
name: Das, Sanskriti
name: Krongold, Yair
name: Nicastro, Fabrizio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Most of the baryonic mass in the circumgalactic medium (CGM) of a spiral galaxy is believed to be warm-hot, with temperature around $10^6$K. The narrow OVI absorption lines probe a somewhat cooler component at $\log \rm T(K)= 5.5$, but broad OVI absorbers have the potential to probe the hotter CGM. Here we present 376 ks Chandra LETG observations of a carefully selected galaxy in which the presence of broad OVI together with the non-detection of Lya was indicative of warm-hot gas. The strongest line expected to be present at $\approx 10^6$K is OVII $λ21.602$. There is a hint of an absorption line at the redshifted wavelength, but the line is not detected with better than $2σ$ significance. A physical model, taking into account strengths of several other lines, provides better constraints. Our best-fit absorber model has $\log \rm T(K) =6.3\pm 0.2$ and $\log \rm N_{H} (cm^{-2})=20.7^{+0.3}_{-0.5}$. These parameters are consistent with the warm-hot plasma model based on UV observations; other OVI models of cooler gas phases are ruled out at better than $99$% confidence. Thus we have suggestive, but not conclusive evidence for the broad OVI absorber probing the warm-hot gas from the shallow observations of this pilot program. About 800ks of XMM-Newton observations will detect the expected absorption lines of OVII and OVIII unequivocally. Future missions like XRISM, Arcus and Athena will revolutionize the CGM science.
description: Submitted to ApJ
Gauge-noninvariance of quantum cosmology and vacuum dark energy
Creators: name: Dymnikova, Irina
name: Fil'chenkov, Michael
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We address the question how to adapt cosmological constant $Λ$ for description of a vacuum dark energy density jumping from the big initial value to the small today value suggested by observations. We find such a possibility in the gauge-noninvariance of quantum cosmology which leads to a connection between a choice of the gauge and quantum spectrum for a certain physical quantity which can be specified in the framework of the minisuperspace model. We introduce a particular gauge in which the cosmological constant $Λ$ is quantized and show that making a measurement of $Λ$ today one can find its small value with the biggest probability, while at the beginning of the evolution, the biggest probability corresponds to its biggest value. Transitions between quantum levels of $Λ$ in the course of the Universe evolution, could be related to several scales for symmetry breaking.
description: 5 pages, 1 figure
Hybrid spreading mechanisms and T cell activation shape the dynamics of HIV-1 infection
Creators: name: Zhang, Changwang
name: Zhou, Shi
name: Groppelli, Elisabetta
name: Pellegrino, Pierre
name: Williams, Ian
name: Borrow, Persephone
name: Chain, Benjamin M.
name: Jolly, Clare
Publisher: name: arXiv
Year: 2015
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Artificial Intelligence (cs.AI)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Biological Physics (physics.bio-ph)
subject: Cell Behavior (q-bio.CB)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: HIV-1 can disseminate between susceptible cells by two mechanisms: cell-free infection following fluid-phase diffusion of virions and by highly-efficient direct cell-to-cell transmission at immune cell contacts. The contribution of this hybrid spreading mechanism, which is also a characteristic of some important computer worm outbreaks, to HIV-1 progression in vivo remains unknown. Here we present a new mathematical model that explicitly incorporates the ability of HIV-1 to use hybrid spreading mechanisms and evaluate the consequences for HIV-1 pathogenenesis. The model captures the major phases of the HIV-1 infection course of a cohort of treatment naive patients and also accurately predicts the results of the Short Pulse Anti-Retroviral Therapy at Seroconversion (SPARTAC) trial. Using this model we find that hybrid spreading is critical to seed and establish infection, and that cell-to-cell spread and increased CD4+ T cell activation are important for HIV-1 progression. Notably, the model predicts that cell-to-cell spread becomes increasingly effective as infection progresses and thus may present a considerable treatment barrier. Deriving predictions of various treatments' influence on HIV-1 progression highlights the importance of earlier intervention and suggests that treatments effectively targeting cell-to-cell HIV-1 spread can delay progression to AIDS. This study suggests that hybrid spreading is a fundamental feature of HIV infection, and provides the mathematical framework incorporating this feature with which to evaluate future therapeutic strategies.
Effects of flush solutions on radial artery catheter patency
Creators: name: Budz, Bernice
Publisher: name: University of British Columbia
Year: 2009

description: This randomized, double blind experimental study was designed to test the effects of flush solutions on radial arterial catheter patency. Factors influencing haemostasis, endothelial damage, rate and turbidity of blood flow, and inherent coagulation factors, provide the framework to examine the arterial catheter flush system. The purpose of this study was to compare the effectiveness of two concentrations of heparin, 2 U/mL and 1 U/mL, and one of normal saline in maintaining patency of radial artery catheters. It was hypothesized that when subjects' radial arterial catheters were provided routine catheter care and continuous flushing with 3 .mL/hr of either heparin 2.0 U/mL, heparin 1.0 U/mL, or saline flush solution there would be: (1) no difference in occlusion risk between flush solution groups as indicated by: prothrombin time (PT), partial thromboplastin time (PTT), platelet count, and the presence of clots in the solution flushed through the catheter and/or on the catheter tip after removal; and (2) no difference in frequency of occlusion between flush solutions groups as indicated by removal of the catheter for any of the following reasons: (a) the inability to flush the catheter, (b) the inability to aspirate blood from the catheter, (c) loss of arterial catheter waveform on the monitor. Thirty cardiac surgery patients were randomly assigned to one of three groups. Each group consisted of 10 subjects who received a flush solution containing either heparin 2.0 U/mL, heparin 1.0 U/mL or saline. Hypothesis one could not be supported. Of the coagulation tests, measured two to three times postoperatively, the 1 U/mL group had more normal PT times on admission and significantly higher platelet counts at 24 hours than the saline and 2 U/mL groups. Since the 1 U/mL group also had significantly shorter pump times, these findings may be related to the mechanical actions of the pump, the high concentration of heparin on pump, and the dilutional effect on the coagulation factors. The finding that seems to be most related to the amount of heparin in the flush solution, is that three catheters in the saline group had clots when removed, while there were no clots in the catheters for the other 2 groups. Hypothesis two also could not be supported. Although there were no significant differences in the frequency of difficulty with flushing the catheter, dampened waveform pattern, and complete loss of arterial waveform pattern, the saline group had significantly more difficulties with aspirating blood and more catheters removed because of occlusion. Furthermore, although not statistically different, the saline group had more positional catheters and their catheters were flushed more often. Although the sample was small, the results of this study tend to indicate that heparin continues to be required in the flush solution to maintain arterial catheter patency.