cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Μοντελοποίηση, Προσομοίωση και Απόδοση Μεθόδων Ανάθεσης Πόρων σε Ετερογενή Υπολογιστικά Νέφη
Creators: name: Μπάγκος, Θωμάς Βάιου
Publisher: name: Aristotle University of Thessaloniki
Year: 2022
Subjects: Προσομοίωση
Απόδοση
Κατανεμημένα συστήματα
Simulation
Performance
Distributed Systems

description: Στη σημερινή εποχή, τα υπολογιστικά συστήματα διαδραματίζουν έναν πολύ σημαντικό ρόλο, σχεδόν σε κάθε τομέα της ζωής. Σε αυτό συνεισφέρει φυσικά και η συνεχής βελτίωση των υποδομών των δικτύων που εξασφαλίζουν συνδεσιμότητα και ταχεία μεταφορά δεδομένων. Ιδιαίτερο ενδιαφέρον παρουσιάζουν τα κατανεμημένα συστήματα και δη τα ετερογενή, των οποίων οι μονάδες μπορούν να έχουν διαφορετικά χαρακτηριστικά, αλλά λειτουργούν αρμονικά. Τα περισσότερο διαδεδομένα ετερογενή συστήματα είναι πλέον τα cloud και fog computing, των οποίων η μελέτη απασχολεί καθημερινά κορυφαίους ερευνητές ανά τον κόσμο. Για την αποτελεσματική μελέτη τους απαιτείται η γνώση μεθόδων χρονοδρομολόγησης και ανάθεσης πόρων, καθώς και ανάπτυξης και χρήσης μοντέλων προσομοίωσης, η οποία αποτελεί τον πιο αποτελεσματικό τρόπο εκτίμησης της απόδοσής τους σε ορισμένες συνθήκες που παρουσιάζουν ενδιαφέρον. Στο πρώτο σκέλος της εργασίας αναλύονται θεμελιώδεις έννοιες, όπως αυτές των παράλληλων και κυρίως των κατανεμημένων ετερογενών συστημάτων, καθώς και των μεθόδων χρονοδρομολόγησης και ανάθεσης πόρων, καθώς και οι βασικές αρχές προσομοίωσης. Στο δεύτερο σκέλος παρουσιάζεται διεξοδικά ένα σύστημα hybrid cloud που εξυπηρετεί linear workflows και αναλύεται η λειτουργία και απόδοσή του σε ορισμένες συνθήκες, μέσω του ειδικού λογισμικού προσομοίωσης που αναπτύχθηκε
description: Computer systems nowadays have a very important role in almost every field. Of course, the continuous improvement of network infrastructures that ensure connectivity and fast data transfer is also a contributing factor. Of particular interest are distributed systems, especially heterogeneous ones, whose units can have different characteristics, but work harmoniously. The most popular heterogeneous systems are currently cloud and fog computing, the study of which occupies leading researchers every day. Their effective study requires knowledge of scheduling and resource allocation methods, as well as the development and use of simulation models, which are the most effective way to study their performance under certain working conditions. In the first part of the project, fundamental concepts are analyzed, such as those of parallel and mainly distributed heterogeneous systems, as well as scheduling and resource allocation methods and the basic principles of computer systems simulation. In the second part, a hybrid cloud system in which linear workflows are allocated and served is thoroughly presented and its operation and performance under certain conditions are analyzed, through a simulation software developed
Streda formula for the Hofstadter-Wilson-Dirac model in two and four dimensions
Creators: name: Fukui, T.
name: Fujiwara, T.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We rederive the spectral asymmetry of the Wilson-Dirac model in external fields, paying attention to the Chern number due to the Berry connection. We interpret the smooth part of the spectral asymmetry as the Streda formula that is originally derived for the two-dimensional quantum Hall effect (QHE). We show by numerical calculations that the Streda formula reproduces the known first and second Chern numbers in a weak magnetic field limit. We conjecture that the Streda formula is valid even for stronger fields and for more generic systems in higher dimensions.
description: 7 pages, 5 figures, Final version
Trichoura torynopoda Londt 1994, sp. n.
Creators: name: Londt, Jason G. H.
Publisher: name: Zenodo
Year: 1994
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Asilidae
Trichoura
Trichoura torynopoda

description: torynopoda sp. n. ♂ metathoracic tarsomeres 2 and 3 laterally compressed, each with pair of dark red-brown leaf-like setae (Fig. 87); ♂ genitalia as in Figs 100-- 102...................... Material (NMSA - Type 1118): SOUTH AFRICA: Transvaal: 3 ♂ (HT & PT) 1 ♀ (PT): ' Bloernhof [27°39'S: 25°36'E] / Transvaal / 28.xii. [19]62 / Haeselbarth'; 1 ♂ (PT), Pretoria [25°45'S:28°1O'E], Waterkloof, xii. 1915, Munro. Etymology: Gr. toryne -ladle + podos - foot (refers to paddle-shaped tarsal setae).
description: Published as part of Londt, Jason G. H., 1994, Afrotropical Asilidae (Diptera) 25. A key to the genera of the subfamily Stenopogoninae with new synonymy and descriptions of six new genera, pp. 71-96 in ANNALS OF THE NATAL MUSEUM 35 on page 93, DOI: 10.5281/zenodo.8360701
Vulnerability of Married Women to HIV Infection and Factors Contributing to Vulnerability in Nazareth, Ethiopia
Creators: name: Abdishekur, Dursit
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2000

description: HIV\AIDS was recognized as a disease of inequality and marginalization. Women are becoming more vulnerable to HIV infection than men. Africa leads the HIV infection at a forefront and nearly 60% of people living with HIV were women of child bearing age at the end of the year 2001. AIDS virus, also, appears to be increasingly infecting married women in developing countries A total of 1276 married women aged 15 to 49 were selected in Nazareth town, the capital city of Eastern Shoa zone, using multi stage sampling method. The study aimed at assessing vulnerability of married women to HIV infections and their risk-awareness level measured by reported history of STDs or high-risk sexual behaviors by married couples and worry to have been infected by HIV respectively, using a structured questionnaire. The study also attempted to assess socio-economic factors contributing to vulnerability to HIV Results showed significant proportion of married women (26.8%) to have been vulnerable to HIV infection as measured by either of the reported prevalence of STIs in married women, which was 16.8% or prevalence of extra marital sexual relationship in either of the couples which was 2.3% and 9.3% in married women and married men respectively. Also, of the 26.8% of married women who were vulnerable to HIV infection, more than two third (66.1%) did not know they were at risk. ix Women who depend economically on their husband and also whose marriage decision to have been motivated for the reason of financial security are found to be more vulnerable to HIV infection. Significant proportion of such women was also found to be not aware of their being at risk. In conclusion, significant proportion of married women were vulnerable to HIV infection and, the majority of married women who were vulnerable did not know they were at risk of acquiring HIV. Vulnerability is more in women who were economically dependent on their husband. Hence, there is a need in to empower women economically by creating job opportunity and also need of awareness creation on safe sex practices in married life and need on a skill of sexual negotiation especially by targeting married women and engaging married men as well.
Adherence to endocrine therapy including ovarian suppression: A large observational cohort study of US women with early breast cancer
Creators: name: Mayer, S.E.
name: Lund, J.L.
name: Reeder-Hayes, K.E.
Publisher: name: John Wiley and Sons Inc
Year: 2021

description: Background: Recent clinical trials support adding ovarian suppression (OS) to oral endocrine therapy (ET) for premenopausal women with early breast cancer. The adoption of OS among real-world populations and the impact of OS on ET adherence have not been evaluated. Methods: This study examined a retrospective, observational cohort of women under the age of 50 years with incident early breast cancer from 2001 to 2016. The IBM MarketScan Commercial insurance claims database was used to identify new users of ET with or without OS and to track discontinuation of or adherence to ET. In all, 21,948 women filled at least 1 prescription for ET within 12 months of their diagnosis after a washout period of 12 months with no prior claims. Patients who received an aromatase inhibitor without a synchronous OS drug were excluded. Results: Use of OS increased over time and reached 11.3% in 2016. In an unadjusted analysis, 40.2% of ET+OS users discontinued ET early, whereas 48.8% of tamoxifen-alone users did. In adjusted analyses, ET+OS users had a similar likelihood of discontinuing ET in comparison with tamoxifen-alone users (hazard ratio, 0.92; 95% confidence interval, 0.83-1.03). Approximately 30% of women had low adherence over the first year of use. The likelihood of high adherence was similar, regardless of OS exposure. Conclusions: The use of OS among young, commercially insured patients with breast cancer increased over time in agreement with recent clinical trial results but remained relatively low. Nonadherence to ET was common, but the use of OS was not associated with lower adherence to ET in this observational, nonrandomized cohort. These findings may reassure oncologists that use of OS does not endanger ET adherence, although prospective studies are needed for confirmation.
A catalytic asymmetric hydrogenation approach towards the synthesis of β-lactam antibiotics
Creators: name: Lim., Chin Yu
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Asymptotic Entropy Bounds
Creators: name: Bousso, Raphael
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show that known entropy bounds constrain the information carried off by radiation to null infinity. We consider distant, planar null hypersurfaces in asymptotically flat spacetime. Their focussing and area loss can be computed perturbatively on a Minkowski background, yielding entropy bounds in terms of the energy flux of the outgoing radiation. In the asymptotic limit, we obtain boundary versions of the Quantum Null Energy Condition, of the Generalized Second Law, and of the Quantum Bousso Bound.
description: 11 pages, 2 figures. v2: definition corrected, references updated
Trichoura tyligma Londt 1994, sp. n.
Creators: name: Londt, Jason G. H.
Publisher: name: Zenodo
Year: 1994
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Asilidae
Trichoura
Trichoura tyligma

description: tyligma sp. n. ♂ metathoracic tarsomeres 2 and 3 of more usual form...................................... 2 Distal part of ♂ epandrium and proctiger downwardly directed; epandrium broadly rounded distally; fused gonocoxites with U-shaped distal part in ventral view............................................................................................. _....................... 3 ♂ proctiger short, bulbous and truncate in lateral view; ♂ genitalia as in Figs 103-105........................................................................................... Material (NMSA - Type 1119): SOUTH AFRICA: Cape Province: I ♂ (HT): ' Sth Africa: Cape Prov / Richtersveld 1 km N / Kuboes l. ix.1989 200 m / 28°25'30"S: 16°59'30"E / 1 Londt B Stuckenberg / & P Croeser Rocky E slope Euphorbia scrub'. Etymology: Gr. tyligma - swelling (refers to bulbous appearance of d terminalia).
description: Published as part of Londt, Jason G. H., 1994, Afrotropical Asilidae (Diptera) 25. A key to the genera of the subfamily Stenopogoninae with new synonymy and descriptions of six new genera, pp. 71-96 in ANNALS OF THE NATAL MUSEUM 35 on page 95, DOI: 10.5281/zenodo.8360701
Escape and collision dynamics in the planar equilateral restricted four-body problem
Creators: name: Zotos, Euaggelos E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We consider the planar circular equilateral restricted four body-problem where a test particle of infinitesimal mass is moving under the gravitational attraction of three primary bodies which move on circular orbits around their common center of gravity, such that their configuration is always an equilateral triangle. The case where all three primaries have equal masses is numerically investigated. A thorough numerical analysis takes place in the configuration $(x,y)$ as well as in the $(x,C)$ space in which we classify initial conditions of orbits into four main categories: (i) bounded regular orbits, (ii) trapped chaotic orbits, (iii) escaping orbits and (iv) collision orbits. Interpreting the collision motion as leaking in the phase space we related our results to both chaotic scattering and the theory of leaking Hamiltonian systems. We successfully located the escape and the collision basins and we managed to correlate them with the corresponding escape and collision times of orbits. We hope our contribution to be useful for a further understanding of the escape and collision properties of motion in this interesting dynamical system.
description: Published in International Journal of Non-Linear Mechanics (IJNLM). arXiv admin note: previous papers with related context: arXiv:1512.08676, arXiv:1508.05209, arXiv:1505.04185, arXiv:1511.04881
A machine learning-based tool for open cluster membership determination in Gaia DR3
Creators: name: van Groeningen, M. G. J.
name: Castro-Ginard, A.
name: Brown, A. G. A.
name: Casamiquela, L.
name: Jordi, C.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Membership studies characterising open clusters with Gaia data, most using DR2, are so far limited at magnitude G = 18 due to astrometric uncertainties at the faint end. Our goal is to extend current open cluster membership lists with faint members and to characterise the low-mass end, which members are important for many applications, in particular for ground-based spectroscopic surveys. We use a deep neural network architecture to learn the distribution of highly reliable open cluster member stars around known clusters. After that, we use the trained network to estimate new open cluster members based on their similarities in a high-dimensional space, five-dimensional astrometry plus the three photometric bands. Due to the improved astrometric precisions of Gaia DR3 with respect to DR2, we are able to homogeneously detect new faint member stars (G > 18) for the known open cluster population. Our methodology can provide extended membership lists for open clusters down to the limiting magnitude of Gaia, which will enable further studies to characterise the open cluster population, e.g. estimation of their masses, or their dynamics. These extended membership lists are also ideal target lists for forthcoming ground-based spectroscopic surveys.
description: 10 pages, 6 figures. Submitted to Astronomy & Astrophysics
Evaluating master integrals in non-factorizable corrections to $t$-channel single-top production at NNLO QCD
Creators: name: Wu, Zihao
name: Long, Ming-Ming
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We studied the two-loop non-factorizable Feynman diagrams for the $t$-channel single-top production process in quantum chromodynamics. We present a systematic computation of master integrals of the two-loop Feynman diagrams with one internal massive propagator in which a complete uniform transcendental basis can be built. The master integrals are derived by means of canonical differential equations and uniform transcendental integrals. The results are expressed in the form of Goncharov polylogarithm functions, whose variables are the scalar products of external momenta, as well as the masses of the top quark and the $W$ boson. We also gave a discussion on the diagrams with potential elliptic sectors.
description: solving the differential equations and perform numerical checks in physical region
Quantum Kerr-de Sitter black holes in three dimensions
Creators: name: Panella, Emanuele
name: Svesko, Andrew
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We use braneworld holography to construct a three-dimensional quantum-corrected Kerr-de Sitter black hole, exactly accounting for semi-classical backreaction effects due to a holographic conformal field theory. By contrast, classically there are no de Sitter black holes in three-dimensions, only geometries with a single cosmological horizon. The quantum Kerr black hole shares many qualitative features with the classical four-dimensional Kerr-de Sitter solution. Of note, backreaction induces inner and outer black hole horizons which hide a ring singularity. Moreover, the quantum-corrected geometry has extremal, Nariai, and ultracold limits, which appear as fibered products of a circle and two-dimensional anti-de Sitter, de Sitter, and Minkowski space, respectively. The thermodynamics of the classical bulk black hole, described by the rotating four-dimensional anti-de Sitter C-metric, has an interpretation on the brane as thermodynamics of the quantum black hole, obeying a semi-classical first law where the Bekenstein-Hawking area entropy is replaced by the generalized entropy. For purposes of comparison, we derive the renormalized quantum stress-tensor due to a free conformally coupled scalar field in the classical Kerr-de Sitter conical geometry and perturbatively solve for its backreaction.
description: 31 pages + appendices, 3 figures; v2: references added, JHEP version
Trichoura tankwa Londt 1994, sp. n.
Creators: name: Londt, Jason G. H.
Publisher: name: Zenodo
Year: 1994
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Asilidae
Trichoura
Trichoura tankwa

description: tankwa sp. n. ♂ proctiger elongate (almost as long as gonocoxite)........................................... 4 Postpronotallobe yellowish; ♂ genitalia as in Figs 97-99............. Material (NMSA - Type 1120): SOUTH AFRICA: Cape Province: 3 ♂ (HT & PT) 2 ♀ (PT) 1?: ' Tankwa Karoo / Waterval [?j / c.P. / Mus., Expd., / Nov. 1952 ' (SAMC, NMSA - 1 ♂ PT). Etymology: From the Tankwa Karoo.
description: Published as part of Londt, Jason G. H., 1994, Afrotropical Asilidae (Diptera) 25. A key to the genera of the subfamily Stenopogoninae with new synonymy and descriptions of six new genera, pp. 71-96 in ANNALS OF THE NATAL MUSEUM 35 on page 95, DOI: 10.5281/zenodo.8360701
Die Morse-Thue Folge und Begabungsförderung
Creators: name: Rosebrock, Stephan
Publisher: name: Gesellschaft für Didaktik der Mathematik
Year: 2014
Subjects: subject: 510

description: Im ersten Teil wird eine Folge von Symbolen vorgestellt, die Morse-Thue Folge, die viele spannende Eigenschaften hat. Diese Folge lässt sich leicht erzeugen und untersuchen. Sie führt auf elementare Weise zu einem Fraktal, der Koch-Kurve. Im zweiten Teil wird knapp begründet, warum sich diese Folge hervorragend zur Begabungsförderung von Schülern in der Sekundarstufe eignet. Sie ist motivierend und an ihr lässt sich wirkliches mathematisches Arbeiten erleben.
Dealings with the firm of Dombey and Son, no. 17
Creators: name: Dickens, Charles, 1812-1870
Publisher: name: University of Victoria Libraries
Year: 2018
Subjects: subject: Social classes
valueUri: http://id.worldcat.org/fast/1122346
subject: Social conflict
valueUri: http://id.worldcat.org/fast/1122378
subject: Child abuse
valueUri: http://id.worldcat.org/fast/854223
subject: Fathers and daughters
valueUri: http://id.worldcat.org/fast/921890
subject: Dysfunctional families
valueUri: http://id.worldcat.org/fast/1728523
subject: Families
valueUri: http://id.worldcat.org/fast/1728849

description: Follows the fortunes of a shipping firm owner, who is frustrated at the lack of a son to follow him in his footsteps; he initially rejects his daughter's love before eventually becoming reconciled with her before his death. The original parts issued from October 1846 to April 1848. Chapters 52-54: Chapter 52. Secret intelligence -- Chapter 53. More intelligence -- Chapter 54. The fugitives
title: Rede Ma(g)dalena Internacional
title: Teatro das Oprimidas
titleType: Subtitle
Creators: name: Santos, Bárbara
Publisher: name: CICS.NOVA - Centro Interdisciplinar de Ciências Sociais, Faculdade de Ciências Sociais e Humanas, Universidade NOVA de Lisboa
Year: 2018

description: Texto de Estado da Questão sobre o "Teatro das Oprimidas", por Bárbara Santos.
description: Santos, B. (2018). Rede Ma(g)dalena Internacional: Teatro das Oprimidas. Faces de Eva. Estudos sobre a Mulher, (39), 113-117. ISSN: 0874-6885
The metastable minima of the Heisenberg spin glass in a random magnetic field
Creators: name: Sharma, Auditya
name: Yeo, Joonhyun
name: Moore, M. A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We have studied zero temperature metastable states in classical $m$-vector component spin glasses in the presence of $m$-component random fields (of strength $h_{r}$) for a variety of models, including the Sherrington Kirkpatrick (SK) model, the Viana Bray (VB) model and the randomly diluted one-dimensional models with long-range power law interactions. For the SK model we have calculated analytically its complexity (the log of the number of minima) for both the annealed case and the quenched case, both for fields above and below the de Almeida Thouless (AT) field ($h_{AT} > 0$ for $m>2$). We have done quenches starting from a random initial state by putting spins parallel to their local fields until convergence and found that in zero field it always produces minima which have zero overlap with each other. For the $m=2$ and $m=3$ cases in the SK model the final energy reached in the quench is very close to the energy $E_c$ at which the overlap of the states would acquire replica symmetry breaking features. These minima have marginal stability and will have long-range correlations between them. In the SK limit we have analytically studied the density of states $ρ(λ)$ of the Hessian matrix in the annealed approximation. Despite the absence of continuous symmetries, the spectrum extends down to zero with the usual $\sqrtλ$ form for the density of states for $h_{r}h_{AT}$, there is a gap in the spectrum which closes up as $h_{AT}$ is approached. For the VB model and the other models our numerical work shows that there always exist some low-lying eigenvalues and there never seems to be a gap. There is no sign of the AT transition in the quenched states reached from infinite temperature for any model but the SK model, which is the only model which has zero complexity above $h_{AT}$.
description: 16 pages, 8 figures (with modifications), rewritten text and abstract
Chirality Changing RG Flows: Dynamics and Models
Creators: name: Shirman, Yuri
name: Shukla, Shreya
name: Waterbury, Michael
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Chirality plays an important role in understanding the dynamics of quantum field theories. In this paper, we study the dynamics of models where renormalization group flows change the chiral structure of the theory. We introduce model building tools and construct models with a variety of chirality flows: from the appearance of new massless composite matter, to the development of mass gaps to completely general changes in the chiral matter content. The stability of chirally symmetric vacua is sensitive to the interplay between non-perturbative dynamics and deformations necessary to generate chirality flows. In particular, we show that chirality flows can be easily induced by deformations of s-confining models. On the other hand, in the absence of true s-confinement, the required deformations destabilize chirally symmetric ground states.
description: 21 pages
Trichoura proctomeces Londt 1994, sp. n.
Creators: name: Londt, Jason G. H.
Publisher: name: Zenodo
Year: 1994
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Asilidae
Trichoura
Trichoura proctomeces

description: proctomeces sp. n. Postpronotallobe blackish; ♂ genitalia as in Figs 94-96........ Material (NMSA - Type 1121): SOUTH AFRICA: Cape Province: 1 ♂ (HT): ' Knersvlakte north / of Vanrhynsdorp [31 °37'S: 18°44'Ej / south-west Cape / 6-9 October 1964 / B & P Stuckenberg'; 1 ♂ 1 ♀ (PT), Knersvlakte, x. 1939, Mus. Staff (SAMC). Etymology: Gr. procto- - anus, tail (proctiger) + mekos -long (refers to elongate ♂ proctiger).
description: Published as part of Londt, Jason G. H., 1994, Afrotropical Asilidae (Diptera) 25. A key to the genera of the subfamily Stenopogoninae with new synonymy and descriptions of six new genera, pp. 71-96 in ANNALS OF THE NATAL MUSEUM 35 on page 95, DOI: 10.5281/zenodo.8360701
Hofstadter butterfly of a quasicrystal
Creators: name: Fuchs, J. -N
name: Vidal, J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The energy spectrum of a tight-binding Hamiltonian is studied for the two-dimensional quasiperiodic Rauzy tiling in a perpendicular magnetic field. This spectrum known as a Hofstadter butterfly displays a very rich pattern of bulk gaps that are labeled by four integers, instead of two for periodic systems. The role of phason-flip disorder is also investigated in order to extract genuinely quasiperiodic properties. This geometric disorder is found to only preserve main quantum Hall gaps.
description: 9 pages, 5 figures, published version
Antiferromagnet-mediated interlayer exchange: hybridization versus proximity effect
Creators: name: Polishchuk, D. M.
name: Tykhonenko-Polishchuk, Yu. O.
name: Lytvynenko, Ya. M.
name: Rostas, A. M.
name: Kuncser, V.
name: Kravets, A. F.
name: Tovstolytkin, A. I.
name: Gomonay, O. V.
name: Korenivski, V.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the interlayer coupling between two thin ferromagnetic (F) films mediated by an antiferromagnetic (AF) spacer in F*/AF/F trilayers and show how it transitions between different regimes on changing the AF thickness. Employing layer-selective Kerr magnetometry and ferromagnetic-resonance techniques in a complementary manner enables us to distinguish between three functionally distinct regimes of such ferromagnetic interlayer coupling. The F layers are found to be individually and independently exchange-biased for thick FeMn spacers - the first regime of no interlayer F-F* coupling. F-F* coupling appears on decreasing the FeMn thickness below 9 nm. In this second regime found in structures with 6.0-9.0 nm thick FeMn spacers, the interlayer coupling exists only in a finite temperature interval just below the effective Néel temperature of the spacer, which is due to magnon-mediated exchange through the thermally softened antiferromagnetic spacer, vanishing at lower temperatures. The third regime, with FeMn thinner than 4 nm, is characterized by a much stronger interlayer coupling in the entire temperature interval, which is attributed to a magnetic-proximity induced ferromagnetic exchange. These experimental results, spanning the key geometrical parameters and thermal regimes of the F*/AF/F nanostructure, complemented by a comprehensive theoretical analysis, should broaden the understanding of the interlayer exchange in magnetic multilayers and potentially be useful for applications in spin-thermionics.
description: 14 pages, 9 figures
Uncovering the hidden quantum critical point in disordered massless Dirac and Weyl semi-metals
Creators: name: Pixley, J. H.
name: Huse, David A.
name: Sarma, S. Das
Publisher: name: arXiv
Year: 2016
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the properties of the avoided or hidden quantum critical point (AQCP) in three dimensional Dirac and Weyl semi-metals in the presence of short range potential disorder. By computing the averaged density of states (along with its second and fourth derivative at zero energy) with the kernel polynomial method (KPM) we systematically tune the effective length scale that eventually rounds out the transition and leads to an AQCP. We show how to determine the strength of the avoidance, establishing that it is not controlled by the long wavelength component of the disorder. Instead, the amount of avoidance can be adjusted via the tails of the probability distribution of the local random potentials. A binary distribution with no tails produces much less avoidance than a Gaussian distribution. We introduce a double Gaussian distribution to interpolate between these two limits. As a result we are able to make the length scale of the avoidance sufficiently large so that we can accurately study the properties of the underlying transition (that is eventually rounded out), unambiguously identify its location, and provide accurate estimates of the critical exponents $ν=1.01\pm0.06$ and $z=1.50\pm0.04$. We also show that the KPM expansion order introduces an effective length scale that can also round out the transition in the scaling regime near the AQCP.
description: 5 pages 4 figures, Supplemental Material 2 pages 4 figures, replaced with published version
The Formation and Evolution of Ordinary Chondrite Parent Bodies
Creators: name: Vernazza, Pierre
name: Zanda, Brigitte
name: Nakamura, Tomoki
name: Scott, Edward
name: Russell, Sara
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Ordinary chondrites (OCs) are by far the most abundant meteorites (80% of all falls). Their origin has long been the matter of a heated debate. About thirty years ago (e.g., Pellas 1988), it was proposed that OCs should originate from S-type bodies (the most abundant asteroid spectral types in the inner part of the asteroid belt), but the apparent discrepancy between S-type asteroid and OC reflectance spectra generated what was known as the S-type--OC conundrum. This paradox has gradually been resolved over the years. It is now understood that space weathering processes are responsible for the spectral mismatch between S-type bodies and OCs. Furthermore, both telescopic observations and the first asteroid sample return mission (Hayabusa) indicate that most S-type bodies have mineralogies similar to those of OCs. Importantly, the S-type/OC link, which has remained sterile for more than 30 years, has been delivering fundamental constraints on the formation and evolution of planetesimals over the recent years.
description: Book chapter
Lernpfade − Ein Weg zur selbständigen und sinnvollen Nutzung von digitalen Werkzeugen durch Schüler/innen
Creators: name: Roth, Jürgen
name: Wiesner, Heike
Publisher: name: Gesellschaft für Didaktik der Mathematik
Year: 2014
Subjects: subject: 510

description: Pointiert formuliert geht es beim Einsatz von Computerwerkzeugen im Mathematikunterricht darum, die Selbsttätigkeit der Schüler/innen zu unterstützen und digitale Werkzeuge sinnvoll zu nutzen, um die Ziele des Mathematikunterrichts zu erreichen. Probleme die dabei in der Praxis auftreten, drehen sich um den Umgang mit digitalen Werkzeugen. „Umgang“ umfasst hier drei Aspekte, nämlich die Handhabung (Werkzeugkompetenz), die methodische Unterrichtseinbindung (Methodenkompetenz) und die technisch-organisatorische Verfügbarkeit. Ein Weg zur konstruktiven Auseinandersetzung mit diesen Problemen ist der Einsatz von Lernpfaden.
Trichoura krugeri Londt 1994, sp. n.
Creators: name: Londt, Jason G. H.
Publisher: name: Zenodo
Year: 1994
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Asilidae
Trichoura
Trichoura krugeri

description: krugeri sp. n. Distal part of ♂ epandrium and proctiger straight, not downwardly directed; epandrium pointed or narrowly rounded distally; fused gonocoxites not Ushaped distally in ventral view............................................................................ 5 ♂ epandrium longer than proctiger and gonocoxite in lateral view; ♂ genitalia as in Figs 88-90................................................................................... Material (NMSA - Type 1122): SOUTH AFRICA: Transvaal: 2 ♂ (HT & PT): ' South Africa. Transvaal / Kruger Park 9-xii. I 972 / Timbetene Tswiri waterholes / savanna woodland nr Skukuza / B & P Stuckenberg 243IDc'. Etymology: Named after President Paul Kruger, after whom the Kruger National Park was named
description: Published as part of Londt, Jason G. H., 1994, Afrotropical Asilidae (Diptera) 25. A key to the genera of the subfamily Stenopogoninae with new synonymy and descriptions of six new genera, pp. 71-96 in ANNALS OF THE NATAL MUSEUM 35 on page 95, DOI: 10.5281/zenodo.8360701
Assessing clinical trial effects on outcomes among pediatric and adolescent and young adult (AYA) patients with cancer
Creators: name: Lund, J.L.
name: Thai, S.
name: Webster-Clark, M.
name: Yang, J.Y.
name: Shmuel, S.
Publisher: name: John Wiley and Sons Inc
Year: 2021

description: We read with great interest the study by Schapira and colleagues which compared overall survival and morbidity among pediatric and adolescent and young adult (AYA) cancer patients treated in phase 3 clinical trials to matched patients receiving care off-trial. This thought-provoking study raises key considerations for ongoing efforts to improve access and equity in clinical trial enrollment, as well as for future research studies comparing outcomes of patients enrolled in trials to those receiving care in clinical practice.
Canonical singularities of dimension three in characteristic 2 which do not follow Reid's rules
Creators: name: Hirokado, Masayuki
Publisher: name: arXiv
Year: 2016
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We continue to study and present concrete examples in characteristic 2 of compound Du Val singularities defined over an algebraically closed field which have one dimensional singular loci but cannot be written as products (a rational double point) x (a curve) up to analytic isomorphism at any point of the loci. Unlike in other characteristics, we find a large number of such examples whose general hyperplane sections have rational double points of type D. We consider these compound Du Val singularities as a special class of canonical singularities, intend to complete classification in arbitrary characteristic reinforcing Miles Reid's result in characteristic zero.
Uplift and towers of states in warped throat
Creators: name: Seo, Min-Seok
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the connection between the distance conjecture and the uplift potential. For this purpose, we consider the concrete model, the warped deformed conifold embedded into Type IIB flux compactifications, with the uplift potential produced by $\overline{\rm D3}$-branes at the tip of the throat. Whereas the various mass scales associated with towers of states can be found, it turns out that the lightest tower mass scale satisfies the scaling behavior with respect to the uplift potential, which is meaningful provided the number of $\overline{\rm D3}$-branes is nonzero. This indicates that the effective theory becomes invalid in the vanishing limit of the uplift potential by the descent of an infinite tower of states from UV, as predicted in the distance conjecture. Since too large uplift potential is also problematic due to the runaway behavior of the moduli potential as well as the sizeable backreaction of $\overline{\rm D3}$-branes, the uplift potential is bounded from both above and below. In the simple model like the KKLT or the large volume scenario in which non-perturbative effect is dominatd by the single term, this bound can be rewritten as the bound on the size of the superpotential.
description: 29 pages, version published in JHEP
Impact of Dimension-8 SMEFT operators on Diboson Productions
Creators: name: Degrande, Céline
name: Li, Hao-Lin
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We for the first time identify all the dimension-8 (dim-8) SMEFT operators that can have an interference with the SM with $E^4/Λ^4$ enhancement in the high energy limit for the processes $q\bar{q}\to WW/WZ$. Our results therefore explicitly show that the non-interference observed for the dimension-six does not extend to dimension-eight. We compute the contributions of those dimension-8 operators to the cross-section at the 14 TeV Large Hadron Collider and compare the results with dimension-6 (dim-6) originated corrections at the order of dim-6-SM interference and dim-6 squared. We find one (two) dim-8 operator(s) can generate amplitudes of a similar order of magnitude compared with their dim-6 squared counterparts assuming unity dimensionless Wilson coefficients. During the study, new non-interference scenarios are found due to the selection rule of angular momentum as well as strong suppression due to the symmetric initial state for the proton-proton collider.
description: 30 pages, 9 figures
Trichoura mesochora Londt 1994, sp. n.
Creators: name: Londt, Jason G. H.
Publisher: name: Zenodo
Year: 1994
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Asilidae
Trichoura
Trichoura mesochora

description: mesochora sp. n. ♂ epandrium shorter than proctiger and gonocoxite in lateral view; ♂ genitalia as in Figs 91-93............................................................................. Material (NMSA - Type 1123): SOUTH AFRICA: Orange Free State: 1 ♂ (HT) 1 ♀ (PT): 'South Africa O.F.S. / 30 km East of Boshof / 2825DA 16.iii.1982 / 1. Londt & L. Schoeman / Dry area near koppie'; 5 ♀ (PT), Krugersdrift Dam, Bloemfontein, SE 2926Aa, i.1982, Entomology Dept. (BMSA). Cape Province: 1 ♀ (PT), 35 km W Kimberley, 2824CB, 17.iii. 1982, Londt & Schoeman. Etymology: Gr. f. mesotes - middle, central part + choros - place, country (refers to the species inhabiting the central parts of southern Africa).
description: Published as part of Londt, Jason G. H., 1994, Afrotropical Asilidae (Diptera) 25. A key to the genera of the subfamily Stenopogoninae with new synonymy and descriptions of six new genera, pp. 71-96 in ANNALS OF THE NATAL MUSEUM 35 on page 95, DOI: 10.5281/zenodo.8360701
Spin structure factors of chiral quantum spin liquids on the kagome lattice
Creators: name: Halimeh, Jad C.
name: Punk, Matthias
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We calculate dynamical spin structure factors for gapped chiral spin liquid states in the spin-1/2 Heisenberg antiferromagnet on the kagome lattice using Schwinger-boson mean-field theory. In contrast to static (equal-time) structure factors, the dynamical structure factor shows clear signatures of time-reversal symmetry breaking for chiral spin liquid states. In particular, momentum inversion $\bm{k} \to -\bm{k}$ symmetry as well as the six-fold rotation symmetry around the $Γ$-point are lost. We highlight other interesting features, such as a relatively flat onset of the two-spinon continuum for the \emph{cuboc1} state. Our work is based on the projective symmetry group classification of time-reversal symmetry breaking Schwinger-boson mean-field states by Messio, Lhuillier, and Misguich.
description: 8 pages, 6 figures, journal paper
Dealings with the firm of Dombey and Son, no. 06
Creators: name: Dickens, Charles, 1812-1870
Publisher: name: University of Victoria Libraries
Year: 2018
Subjects: subject: Social classes
valueUri: http://id.worldcat.org/fast/1122346
subject: Social conflict
valueUri: http://id.worldcat.org/fast/1122378
subject: Child abuse
valueUri: http://id.worldcat.org/fast/854223
subject: Fathers and daughters
valueUri: http://id.worldcat.org/fast/921890
subject: Dysfunctional families
valueUri: http://id.worldcat.org/fast/1728523
subject: Families
valueUri: http://id.worldcat.org/fast/1728849

description: Follows the fortunes of a shipping firm owner, who is frustrated at the lack of a son to follow him in his footsteps; he initially rejects his daughter's love before eventually becoming reconciled with her before his death. The original parts issued from October 1846 to April 1848. Chapters 17-19: Chapter 17. Captain Cuttle does a little business for the young people -- Chapter 18. Father and daughter -- Chapter 19. Walter goes away
Optimum mixed-state discrimination for noisy entanglement-enhanced sensing
Creators: name: Zhuang, Quntao
name: Zhang, Zheshen
name: Shapiro, Jeffrey H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum metrology utilizes nonclassical resources, such as entanglement or squeezed light, to realize sensors whose performance exceeds that afforded by classical-state systems. Environmental loss and noise, however, easily destroy nonclassical resources, and thus nullify the performance advantages of most quantum-enhanced sensors. Quantum illumination (QI) is different. It is a robust entanglement-enhanced sensing scheme whose 6 dB performance advantage over a coherent-state sensor of the same average transmitted photon number survives the initial entanglement's eradication by loss and noise. Unfortunately, an implementation of the optimum quantum receiver that would reap QI's full performance advantage has remained elusive, owing to its having to deal with a huge number of very noisy optical modes. We show how sum-frequency generation (SFG) can be fruitfully applied to optimum multi-mode Gaussian-mixed-state discrimination. Applied to QI, our analysis and numerical evaluations demonstrate that our SFG receiver saturates QI's quantum Chernoff bound. Moreover, augmenting our SFG receiver with a feed-forward (FF) mechanism pushes its performance to the Helstrom bound in the limit of low signal brightness. The FF-SFG receiver thus opens the door to optimum quantum-enhanced imaging, radar detection, state and channel tomography, and communication in practical Gaussian-state situations.
description: 15 pages, 5 figures, missing references corrected
Supercurrent-induced Skyrmion dynamics and Tunable Weyl points in Chiral Magnet with Superconductivity
Creators: name: Takashima, Rina
name: Fujimoto, Satoshi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Recent studies show superconductivity provides new perspectives on spintronics. We study a heterostructure composed of an s-wave superconductor and a cubic chiral-magnet that can stabilize a topological spin texture, a skyrmion. We propose a supercurrent-induced spin torque that originates from the spin-orbit coupling, and we show that the spin torque can drive a skyrmion in an efficient way that reduces Joule heating. We also study the band structure of Bogoliubov quasiparticles and show the existence of Weyl points, whose positions can be controlled by the direction of the magnetization. This results in an effective magnetic field acting on the quasiparticles in the presence spin textures. Furthermore, the tilt of the Weyl cones can also be tuned by the strength of the spin-orbit coupling, and we propose a possible realization of type-II Weyl points.
description: An appendix is added. 10 pages, 6 figures
Η εκχώρηση και ο συμψηφισμός στο Ιδιωτικό Διεθνές Δίκαιο
Creators: name: Δρούγκα, Ελένη Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2022
Subjects: Εκχώρηση απαίτησης
Συμψηφισμός απαίτησης
Ιδιωτικό Διεθνές Δίκαιο
Assignment
Set Off
Private International Law

description: Αντικείμενο της παρούσας διπλωματικής εργασίας αποτελεί η μελέτη της ενοχικής έννομης σχέσης της εκχώρησης και του συμψηφισμού απαιτήσεων στο ιδιωτικό διεθνές δίκαιο. Η μελέτη επικεντρώνεται στη συνολική επισκόπηση της θεσμικής ρύθμισης και νομολογιακής αντιμετώπισης των συγκεκριμένων ενοχικών δικαιοπραξιών και των επιμέρους εννοιών που τις απαρτίζουν, τόσο δυνάμει του ελληνικού όσο και του ευρωπαϊκού και διεθνούς δικαίου. Ειδικότερα εξετάζονται εκτενώς και διακριτά τα άρθρ. 14 (εκχώρηση και υποκατάσταση) και 17 (συμψηφισμός) του ΚανΡ Ι, ως μέρος της ανεξάρτητης ενότητας του δεύτερου κεφαλαίου του ΚανΡ Ι αλλά και οι διεθνείς συμβάσεις που ρυθμίζουν τις συγκεκριμένες σύνθετες έννομες σχέσεις στην σύγχρονη οικονομική πραγματικότητα
description: The subject of this thesis is the study of the assignment and the set-off of claims in private international law. My study focuses on the overview of the legislative framework and jurisprudence regarding these specific legal transactions, both in the light of greek, european and international law. In particular, the articles examined extensively and separately are article 14 (assignment and substitution) and 17 (set off) of Rome I Regulation, as part of the independent section of the second chapter of the above mentioned Regulation and also the international agreements that govern these specific legal relationships in the modern constantly regenerating economic reality
The role of benthic microalgae in ecosystem function of a temperate, shallow-water marine embayment
Creators: name: Light., Brett R.
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
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