cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Performance of the UBC two-stage light-gas gun
Creators: name: Deforge, David James
Publisher: name: University of British Columbia
Year: 2008

description: The performance of UBC two-stage light-gas gun and the associated diagnostics systems were examined under a variety of shot conditions. In the gas gun, the expansion of gas from burning gun powder propels a piston which, in turn, compresses and accelerates the low molecular weight pump gas. The rising pressure of the pump gas eventually opens a petal valve permitting the pump gas to propel a projectile towards the target. At the front of the projectile is a metal disk - the flyer plate. In a typical experiment, the behaviour of the target material under the high pressure conditions that result from the impact between the flyer plate and the target is examined. In this study, the use of gun powder loads of 46 to 150 g, with helium pump gas, resulted in projectile velocities between 2 and 4 km/s for 5 to 9 g projectiles. The ability to measure the projectile velocity with 0.2% uncertainty was demonstrated. Such resolution is comparable to those obtained with systems used by other researchers. The internal ballistics of the gun were modelled with a 1½ dimension Arbitrary Lagrange Eulerian computer code. The calculations had limited success in obtaining the measured projectile velocity. The calculations were also used to estimate the time difference between the arrival of the piston at a preset location along the pump tube and the arrival of the projectile at a given distance from the muzzle of the launch tube. These calculations showed reasonable agreement with the measured values. Experiments were also performed to examine the orientation and curvature of the flyer plate on impact with target. The size and orientation of the tilt of the flyer plate were relatively reproducible for shots with large copper flyer plates in primarily stress-free sabots. The tilt values with these projectiles were less than 10 mrad. It was also demonstrated that the flyer plate curvature was consistently concave for copper flyer plate projectiles with radii of curvature of approximately 1 m.
Machine Learning Techniques for Image Forensics in Adversarial Setting
Creators: name: Nowroozi, Ehsan
Publisher: name: Zenodo
Year: 2020
Subjects: Adversarial machine learning, Adversarial multimedia forensics, Machine learning, Deep learning, Cybersecurity, Image forensics, Multimedia forensics, Multimedia security, Adversarial learning

description: The use of machine-learning for multimedia forensics is gaining more and more consensus, especially due to the amazing possibilities offered by modern machine learning techniques. By exploiting deep learning tools, new approaches have been proposed whose performance remarkably exceeds those achieved by state-of-the-art methods based on standard machine-learning and model-based techniques. However, the inherent vulnerability and fragility of machine learning architectures pose new serious security threats, hindering the use of these tools in security-oriented applications, and, among them, multimedia forensics. The analysis of the security of machine learning-based techniques in the presence of an adversary attempting to impede the forensic analysis, and the development of new solutions capable to improve the security of such techniques is then of primary importance, and, recently, has marked the birth of a new discipline, named Adversarial Machine Learning. By focusing on Image Forensics and image manipulation detection, in particular, this thesis contributes to the above mission by developing novel techniques for enhancing the security of binary manipulation detectors based on machine learning in several adversarial scenarios. The validity of the proposed solutions has been assessed by considering several manipulation tasks, ranging from the detection of double compression and contrast adjustment to the detection of geometric transformations and filtering operations.
description: Cite1: https://www.researchgate.net/publication/ 340402438_Machine_Learning_Techniques_for_Image_Forensics_in_Adversarial_Setting ***** Cite2: https://www.sciencedirect.com/science/article/pii/S0167404820303655
Data to Physicalization: A Survey of the Physical Rendering Process
Creators: name: Djavaherpour, Hessam
name: Samavati, Faramarz
name: Mahdavi-Amiri, Ali
name: Yazdanbakhsh, Fatemeh
name: Huron, Samuel
name: Levy, Richard
name: Jansen, Yvonne
name: Oehlberg, Lora
Publisher: name: arXiv
Year: 2021
Subjects: subject: Graphics (cs.GR)
subject: FOS: Computer and information sciences
subject: I.3.5; I.3.8

description: Physical representations of data offer physical and spatial ways of looking at, navigating, and interacting with data. While digital fabrication has facilitated the creation of objects with data-driven geometry, rendering data as a physically fabricated object is still a daunting leap for many physicalization designers. Rendering in the scope of this research refers to the back-and-forth process from digital design to digital fabrication and its specific challenges. We developed a corpus of example data physicalizations from research literature and physicalization practice. This survey then unpacks the "rendering" phase of the extended InfoVis pipeline in greater detail through these examples, with the aim of identifying ways that researchers, artists, and industry practitioners "render" physicalizations using digital design and fabrication tools.
Interacting Defects Generate Stochastic Fluctuations in Superconducting Qubits
Creators: name: Béjanin, J. H.
name: Earnest, C. T.
name: Sharafeldin, A. S.
name: Mariantoni, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Amorphous dielectric materials have been known to host two-level systems (TLSs) for more than four decades. Recent developments on superconducting resonators and qubits enable detailed studies on the physics of TLSs. In particular, measuring the loss of a device over long time periods (a few days) allows us to investigate stochastic fluctuations due to the interaction between TLSs. We measure the energy relaxation time of a frequency-tunable planar superconducting qubit over time and frequency. The experiments show a variety of stochastic patterns that we are able to explain by means of extensive simulations. The model used in our simulations assumes a qubit interacting with high-frequency TLSs, which, in turn, interact with thermally activated low-frequency TLSs. Our simulations match the experiments and suggest the density of low-frequency TLSs is about three orders of magnitude larger than that of high-frequency ones.
description: Submitted for publication. 13 pages, 5 figures, and 3 tables. Code available at https://gitlab.com/DQMLab/qubitfluctuations
Backreaction in Cosmology
Creators: name: Schander, S.
name: Thiemann, T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this review, we investigate the question of backreaction in different approaches to cosmological perturbation theory, and with a special focus on quantum theoretical aspects. By backreaction, we refer here to the effects of matter field or cosmological inhomogeneities on the homogeneous dynamical background degrees of freedom of cosmology. We begin with an overview of classical cosmological backreaction which is ideally suited for physical situations in the late time Universe. We then proceed backwards in time, considering semiclassical approaches such as semiclassical or stochastic (semiclassical) gravity which take quantum effects of the perturbations into account. Finally, we review approaches to backreaction in quantum cosmology that should apply to the very early Universe where classical and semiclassical approximations break down. The main focus is on a recently proposed implementation of backreaction in quantum cosmology using a Born-Oppenheimer inspired method.
description: 41 pages
Point-contact spectroscopy in neutron-irradiated Mg^{11}B_2
Creators: name: Daghero, D.
name: Calzolari, A.
name: Ummarino, G. A.
name: Tortello, M.
name: Gonnelli, R. S.
name: Stepanov, V. A.
name: Tarantini, C.
name: Manfrinetti, P.
name: Lehmann, E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report on recent results of point-contact spectroscopy measurements in Mg^{11}B_2 polycrystals irradiated at different neutron fluences up to 1.4 x 10^{20} cm^{-2}. The point contacts were made by putting a small drop of Ag paint -- acting as the counterelectrode -- on the cleaved surface of the samples. The gap amplitudes were extracted from the experimental conductance curves, showing Andreev-reflection features, through a two-band Blonder-Tinkham-Klapwijk fit and reported as a function of the Andreev critical temperature of the junctions, TcA. The resulting Delta_sigma(TcA) and Delta_pi(TcA) curves show a clear merging of the gaps when TcA ~ 9K that perfectly confirms the findings of specific-heat measurements in the same samples. Anomalous contacts with TcA > Tc (being Tc the bulk critical temperature) were often obtained, particularly in samples irradiated at very high fluences. Their fit gave a different dependence of Delta_pi on TcA. The possible origin of these contacts is discussed in terms of local current-induced annealing and/or nanoscale inhomogeneities observed by STM in the most irradiated samples.
description: 12 pages, 10 figures, revtex4. One figure removed; Figs. 4 and 8 changed. Text changed (particularly Sect. V)
Οι κεντρικές έννοιες της προστασίας προσωπικών δεδομένων όπως ισχύουν και υπό το πρίσμα του νέου κανονισμού (ΕΕ) 2016/679
Creators: name: Πάλλας, Ιωάννης Δημητρίου-Αγαμέμνονα
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Προσωπικά δεδομένα
Ανωνυμοποίηση
Κανονισμός (ΕΕ) 2016/679
Personal data
Anonymisation
Regulation (EU) 2016/679

description: Σκοπός της παρούσας διπλωματικής εργασίας ήταν η μελέτη και η ανάλυση των τεχνικών ορισμών που συναπαρτίζουν τον ενεστώτα και, μετά την ψήφιση του γενικού κανονισμού (ΕΕ) 2016/679, μελλοντικό εννοιολογικό κορμό του δικαίου προστασίας των προσωπικών δεδομένων. Με αφετηρία τη γραμματική διατύπωση των γενικών διατάξεων του α' κεφαλαίου (άρθρα 1-3) του ν. 2472/1997, εξετάσαμε ειδικά ζητήματα που αναφύονται από οριακές περιπτώσεις εφαρμογής της ειδικής αυτής νομοθεσίας καθώς και τις δικαιοπολιτικές επιλογές που απηχούν οι διαχρονικές θέσεις ελληνικών και ευρωπαϊκών θεσμικών οργάνων για τα ζητήματα αυτά. Επιπλέον, επιλεκτικά παρουσιάσαμε καινοφανείς ορισμούς που θα εισαχθούν από το έτος 2018 υπό το καθεστώς του νέου γενικού κανονισμού και διατυπώσαμε κάποια αρχικά συμπεράσματα και προβληματισμούς ως προς τη νομιμότητα σύγχρονων μεθόδων επεξεργασίας υπό το ισχύον και επερχόμενο νομικό καθεστώς.
description: The aim of the present thesis was the study and analysis of legal definitions that constitute the conceptual backbone of the current and prospective (EU regulation 2016/679) data protection law. Starting from a grammatical interpretation of the general provisions in the Greek law 2472/1997, Chapter I, we examined particular marginal cases and the definition issues that arise thereof, as well as the various policy choices that are reflected in the respective national and European stakeholder opinions. Moreover, we selectively presented novel definitions that are to be implemented in the new EU data protection regulation framework, effective 2018, and drew preliminary conclusions and concerns with regard to the legality of modern practices of data processing in light of the current and the prospective legal regime in data protection law.
Additional file 13: of Diel rewiring and positive selection of ancient plant proteins enabled evolution of CAM photosynthesis in Agave
Creators: name: Yin, Hengfu
name: Guo, Hao-Bo
name: Weston, David
name: Borland, Anne
name: Ranjan, Priya
name: Abraham, Paul
name: Jawdy, Sara
name: Wachira, James
name: Tuskan, Gerald
name: Tschaplinski, Timothy
name: Wullschleger, Stan
name: Guo, Hong
name: Hettich, Robert
name: M. Gross, Stephen
name: Wang, Zhong
name: Visel, Axel
name: Yang, Xiaohan
Publisher: name: figshare
Year: 2018
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Molecular Biology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Developmental Biology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: Computational Biology

description: Figure S3. Positive selection region in chloroplast Î˛-amylase (CT-BMY). (PDF 171 kb)
Neutron Scattering Study on Yttrium Iron Garnet for Spintronics
Creators: name: Nambu, Yusuke
name: Shamoto, Shin-ichi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Spin current -- a flow of the spin degree of freedom in matter -- has vital importance in spintronics. Propagation of the spin current ranges over a whole momentum space; however, generated spin currents are mainly detected in the long-wavelength limit. To facilitate practical uses of spintronics and magnonics, microscopic understanding of the spin current is necessary. We here address yttrium iron garnet, which is a well-employed ferrimagnet for spintronics, and review {\it in re} the momentum- and energy-resolved characteristics of its magnetism. Using {\it unpolarized} neutrons, we refined its detailed crystal and magnetic structure, and examined magnetic excitations through four decades (10~$μ$eV-100~meV) using chopper spectrometers in J-PARC, Japan. We also measured mode-resolved directions of the precessional motion of the magnetic moment, i.e., magnon polarization, which carries the spin current in insulators through {\it polarized} neutron scattering, using a triple-axis spectrometer in ILL, France. The magnon polarization is a hitherto untested fundamental property of magnets, affecting the thermodynamic properties of the spin current. Our momentum- and energy-resolved experimental findings provide an intuitive understanding of the spin current and demonstrate the importance of neutron scattering techniques for spintronics and magnonics.
description: 15 pages, 17 figures
Διερεύνηση συσχέτισης σεισμικών χρονοσειρών
Creators: name: Βουγιούκα, Γεωργία Εμμανουήλ
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Συσχέτιση
Σεισμικά δεδομένα
Χρονοσειρές
Correlation
Seismic data
Time series

description: Εδώ και χρόνια, κέντρο μελέτης και προσοχής είναι το κατά πόσο μπορούν οι σεισμοί να μελετηθούν με τη βοήθεια των μαθηματικών και συγκεκριμένα με την προσέγγιση των χρονοσειρών. Αυτός ήταν και ο στόχος της παρούσας διατριβής, καθώς μελετάει την ύπαρξη συσχέτισης γεγονότων με εφαρμογή στη σεισμολογία. Συγκεκριμένα, γνωρίζοντας ότι δύο από τις πλέον σεισμικά ενεργές ζώνες σε παγκόσμια κλίμακα βρίσκονται στην Νότια Αμερική και στην Ιαπωνία, χρησιμοποιήθηκαν ιστορικά δεδομένα για 230 και 277 σεισμούς αντίστοιχα, αναφορικά με το μέγεθος του κάθε σεισμού και τη χρονική απόκλιση. Τα γεγονότα αυτά αντλήθηκαν και αφορούν το διάστημα των τελευταίων 110 χρόνων (1899-2012). Η έρευνα επεκτάθηκε στην ύπαρξη συσχέτισης μεταξύ των εκάστοτε μεγεθών και ενδιαμέσων χρόνων των σεισμικών φαινομένων, τόσο σε ταυτόχρονη, όσο και σε αυτόνομη κλίμακα. Εφαρμόστηκαν ποικίλοι έλεγχοι, όπως η αυτοσυσχέτιση, γραμμική και μη-γραμμική, η διασυσχέτιση, γραμμική και μη-γραμμική, καθώς και ο συγχρονισμός γεγονότων και η μελέτη του εκθέτη Hurst με τη μέθοδο των αυξομειώσεων με απαλοιφή τάσης για την ύπαρξη συγχρονισμού. Η επεξεργασία των δεδομένων έγινε με προγράμματα σε Matlab, όπου χρησιμοποιήθηκαν υπάρχοντες, αλλά και νεοσύστατοι κώδικες που δημιουργήθηκαν για το σκοπό αυτής της εργασίας. Η παρούσα διατριβή εκπονήθηκε στο πλαίσιο του μεταπτυχιακού προγράμματος «Στατιστική και Μοντελοποίηση» του Αριστοτελείου Πανεπιστημίου Θεσσαλονίκης.
description: Last decades, huge attention has been paid on whether earthquakes could be studied through mathematics and particularly with the approach of time series analysis. This was also the main objective of the present thesis, which studies the existence of cross correlation of events with application to seismology. Specifically, knowing that two of the largest seismic zones worldwide are located in South America and Japan, historical data of big earthquakes, 230 and 277 respectively, are studied with respect to the earthquake intensity and the time divergence. These events refer to the last 110 years (1899-2012). The research was extended to a possible relationship between the respective sizes and split times of seismic events, both in simultaneous and in independent scale. A variety of tools was applied such as linear and nonlinear autocorrelation, linear and nonlinear cross correlation, as well as event synchronization and the Hurst exponent estimated using detrended fluctuation analysis (DFA). The data processing was done with programs in Matlab, where existing codes were used along with newly established codes created for this task. This thesis was developed for the Master's program "Statistics and Modeling" of Aristotle University of Thessaloniki.
A Study of Guidelines for Prevention and Resolution of Termination of Student Status and Monitoring of Academic Performance of Undergraduate Student in the Higher Education Institution under the Office of the Higher Education Commission, Ministry of Higher Education, Science, Research and Innovation
Creators: name: Sawat Wicharapote
Publisher: name: mahasarakham university
Year: 2020
Subjects: Guidelines for Prevention, Resolution of Termination of Student Status, Monitoring of Academic Performance, Undergraduate Student

description: Journal of Humanities and Social Sciences, 39, 4, .109-119
Solutions of the Multivariate Inverse Frobenius--Perron Problem
Creators: name: Fox, Colin
name: Hsiao, Li-Jen
name: Lee, Jeong Eun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation (stat.CO)
subject: FOS: Computer and information sciences

description: We address the inverse Frobenius--Perron problem: given a prescribed target distribution $ρ$, find a deterministic map $M$ such that iterations of $M$ tend to $ρ$ in distribution. We show that all solutions may be written in terms of a factorization that combines the forward and inverse Rosenblatt transformations with a uniform map, that is, a map under which the uniform distribution on the $d$-dimensional hypercube as invariant. Indeed, every solution is equivalent to the choice of a uniform map. We motivate this factorization via $1$-dimensional examples, and then use the factorization to present solutions in $1$ and $2$ dimensions induced by a range of uniform maps.
description: Submitted to Entropy. v2: a few typos fixed
Role of Fe substitution on the anomalous magnetocaloric and magnetoresistance behavior in Tb(Ni1-xFex)2 compounds
Creators: name: Singh, Niraj K.
name: Suresh, K. G.
name: Rana, D. S.
name: Nigam, A. K.
name: Malik, S. K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report the magnetic, magnetocaloric and magnetoresistance results obtained in Tb(Ni1-xFex)2 compounds with x=0, 0.025 and 0.05. Fe substitution leads to an increase in the ordering temperature from 36 K for x=0 to 124 K for x=0.05. Contrary to a single sharp MCE peak seen in TbNi2, the MCE peaks of the Fe substituted compounds are quite broad. We attribute the anomalous MCE behavior to the randomization of the Tb moments brought about by the Fe substitution. Magnetic and magnetoresistance results seem to corroborate this proposition. The present study also shows that the anomalous magnetocaloric and magnetoresistance behavior seen in the present compounds is similar to that of Ho(Ni,Fe)2 compounds.
Text analysis: "Making Palm Oil" and "Palm Tree Cutting" texts
Creators: name: Mansaray, Kondeh
name: Sesay, Albert Korloi
name: Rolle, Nicholas
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: lma

description: M4A and WAV files of recording. See "red notebook" (file bundle 2022-06.004) for the notes.
Additional file 15: of Diel rewiring and positive selection of ancient plant proteins enabled evolution of CAM photosynthesis in Agave
Creators: name: Yin, Hengfu
name: Guo, Hao-Bo
name: Weston, David
name: Borland, Anne
name: Ranjan, Priya
name: Abraham, Paul
name: Jawdy, Sara
name: Wachira, James
name: Tuskan, Gerald
name: Tschaplinski, Timothy
name: Wullschleger, Stan
name: Guo, Hong
name: Hettich, Robert
name: M. Gross, Stephen
name: Wang, Zhong
name: Visel, Axel
name: Yang, Xiaohan
Publisher: name: figshare
Year: 2018
Subjects: subject: Biochemistry
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Evolutionary Biology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: Computational Biology

description: Table S12. List of Agave americana genes with afternoon-to-night shift in expression pattern as compared with the orthologous genes in Arabidopsis. (PDF 69 kb)
Additional file 1: of Neural sentence embedding models for semantic similarity estimation in the biomedical domain
Creators: name: Blagec, Kathrin
name: Xu, Hong
name: Agibetov, Asan
name: Samwald, Matthias
Publisher: name: figshare
Year: 2019
Subjects: Medicine
Molecular Biology
Neuroscience
Biological Sciences not elsewhere classified
Information Systems not elsewhere classified
Mathematical Sciences not elsewhere classified
Developmental Biology

description: Supplementary tables and figures. (DOCX 181 kb)
Higher topological cyclic homology and the Segal conjecture for tori
Creators: name: Carlsson, Gunnar
name: Douglas, Christopher L.
name: Dundas, Bjørn Ian
Publisher: name: arXiv
Year: 2008
Subjects: subject: Algebraic Topology (math.AT)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics
subject: 55P43, 19D55 (Primary) 55P91 (Secondary)

description: We investigate higher topological cyclic homology as an approach to studying chromatic phenomena in homotopy theory. Higher topological cyclic homology is constructed from the fixed points of a version of topological Hochschild homology based on the n-dimensional torus, and we propose it as a computationally tractable cousin of n-fold iterated algebraic K-theory. The fixed points of toral topological Hochschild homology are related to one another by restriction and Frobenius operators. We introduce two additional families of operators on fixed points, the Verschiebung, indexed on self-isogenies of the n-torus, and the differentials, indexed on n-vectors. We give a detailed analysis of the relations among the restriction, Frobenius, Verschiebung, and differentials, producing a higher analog of the structure Hesselholt and Madsen described for 1-dimensional topological cyclic homology. We calculate two important pieces of higher topological cyclic homology, namely topological restriction homology and topological Frobenius homology, for the sphere spectrum. The latter computation allows us to establish the Segal conjecture for the torus, which is to say to completely compute the cohomotopy type of the classifying space of the torus.
Superradiance and anomalous hyperfine splitting in inhomogeneous ensembles
Creators: name: Andrejić, Petar
name: Pálffy, Adriana
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Collective effects in the interaction of light with ensembles of identical scatterers play an important role in many fields of physics. However, often the term ``identical'' is not accurate due to the presence of hyperfine fields which induce inhomogeneous transition shifts and splittings. Here we develop a formalism based on the Green function method to model the linear response of such inhomogeneous ensembles in one-dimensional waveguides. We obtain a compact formula for the collective spectrum, which exhibits deviations from the uniform frequency shift and broadening expected of two level systems. In particular, if the coherent contribution to the collective coupling is large, the effect of inhomogeneous broadening can be suppressed, with the linewidth approaching that of the superradiant value. We apply this formalism to describe collective effects in x-ray scattering off thin-film waveguides for inhomogeneous hyperfine parameters.
An optical fiber-taper probe for wafer-scale microphotonic device characterization
Creators: name: Michael, C. P.
name: Borselli, M.
name: Johnson, T. J.
name: Chrystal, C.
name: Painter, O.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A small depression is created in a straight optical fiber taper to form a local probe suitable for studying closely spaced, planar microphotonic devices. The tension of the "dimpled" taper controls the probe-sample interaction length and the level of noise present during coupling measurements. Practical demonstrations with high-Q silicon microcavities include testing a dense array of undercut microdisks (maximum Q = 3.3x10^6) and a planar microring (Q = 4.8x10^6).
description: 8 pages, 5 figures, for high-res version see http://copilot.caltech.edu/publications/index.htm
Epsilon expansion for a Fermi gas at infinite scattering length
Creators: name: Nishida, Yusuke
name: Son, Dam Thanh
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We show that there exists a systematic expansion around four spatial dimensions for Fermi gas in the unitarity regime. We perform the calculations to leading and next-to-leading orders in the expansion over epsilon=4-d, where d is the dimensionality of space. We find the ratio of chemical potential and Fermi energy to be mu/eF=1/2 epsilon^3/2 + 1/16 epsilon^5/2 ln epsilon -0.0246 epsilon^5/2 and the ratio of the gap in the fermion quasiparticle spectrum and the chemical potential to be Delta/mu=2/epsilon-0.691. The minimum of the fermion dispersion curve is located at |p|=(2m epsilon_0)^1/2 where epsilon_0/mu=2+O(epsilon). Extrapolation to d=3 gives results consistent with Monte Carlo simulations.
description: 4 pages, 4 figures, revtex4; version to appear in Phys. Rev. Lett
Homogeneous cosmologies and the Maupertuis-Jacobi principle
Creators: name: Elias, Luciana A.
name: Saa, Alberto
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A recent work showing that homogeneous and isotropic cosmologies involving scalar fields are equivalent to the geodesics of certain effective manifolds is generalized to the non-minimally coupled and anisotropic cases. As the Maupertuis-Jacobi principle in classical mechanics, such result permits us to infer some dynamical properties of cosmological models from the geometry of the associated effective manifolds, allowing us to go a step further in the study of cosmological dynamics. By means of some explicit examples, we show how the geometrical analysis can simplify considerably the dynamical analysis of cosmological models.
description: 5 pages
Οι καθημερινότητες της πολιτικής, οι πολιτικές της καθημερινότητας: Αντιλήψεις και συμπεριφορές στην Ελλάδα της κρίσης. Το παράδειγμα της ακροδεξιάς.
Creators: name: Γαλάνης, Γεώργιος Πέτρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Ακροδεξιά - Ελλάδα
Εθνικισμός – Ελλάδα – 21ος αιώνας
Μετανάστευση – Ελλάδα – 21ος αιώνας
Far-right - Greece
Nationalism – Greece – 21st century
Immigration – Greece – 21st century

description: Σκοπός της εργασίας είναι η σκιαγράφηση του προφίλ της ελληνικής ακροδεξιάς. Η έρευνα δεν αφορά στα πολιτικά κόμματα της ακροδεξιάς, αλλά στους ψηφοφόρους και στους υποστηρικτές τους. Διήρκησε από τον Δεκέμβριο του 2014 μέχρι και τον Απρίλιο του 2015 και έλαβε χώρα στην περιοχή της δυτικής Θεσσαλονίκης. Τα κόμματα των οποίων οι ψηφοφόροι επιλέγησαν είναι η Χρυσή Αυγή και ο Λαϊκός Ορθόδοξος Συναγερμός. Έγινε προσπάθεια να ανακαλυφθούν οι αναπαραστάσεις των συγκεκριμένων υποκειμένων σε σχέση με τρεις βασικούς θεματικούς άξονες οι οποίοι απασχολούν την επικαιρότητα στην Ελλάδα του σήμερα. Οι άξονες αυτοί είναι η οικονομική κρίση, το μεταναστευτικό και η κρίση στο πολιτικό σύστημα. Για την έρευνα χρησιμοποιήθηκε η μέθοδος των συνεντεύξεων καθώς κρίθηκε ως η καταλληλότερη ώστε να οδηγήσει τη συζήτηση σε μεγαλύτερο βάθος. Ξεκινώντας η εργασία κάνει μια σύντομη παρουσίαση της δημοσιογραφικής και ακαδημαϊκής βιβλιογραφίας πάνω στην ακροδεξιά. Στη συνέχεια διαιρείται σε τρία μέρη, αντίστοιχα με τους θεματικούς άξονες που αναφέρθηκαν παραπάνω, όπου και οι αναπαραστάσεις των πληροφορητών μου παρουσιάζονται και αναλύονται με βάση τη σχετική βιβλιογραφία.
description: The aim of this paper is the delineation of the Greek far-right. The research does not concern the actual political parties of far-right, but mainly those people who vote them and support them. It took place from December 2014 to April 2015 in the area of western Thessaloniki. The political parties whose supporters were chosen were Golden Dawn and Peoples Orthodox Alert. There has been made an effort to discover the thoughts of these subjects in reference to three of the biggest issues in today’ s Greece. Those issues are the economic crisis, the big wave of immigration entering Greece and the crisis in the political system. For the research there have been used interviews as a way of achieving greater depth in the conversation. In the beginning of the paper there is a short presentation of journalistic and academic approaches to the far-right. Subsequently the paper is divided in three chapters accordingly to the issues i mentioned above. Then my subjects’ thoughts are laid down and analyzed based on relevant bibliography.
On the nature of the anomalous event in 2021 in the dwarf nova SS Cygni and its multi-wavelength transition
Creators: name: Kimura, Mariko
name: Yamada, Shinya
name: Nakaniwa, Nozomi
name: Makita, Yoshihiro
name: Negoro, Hitoshi
name: Shidatsu, Megumi
name: Kato, Taichi
name: Enoto, Teruaki
name: Isogai, Keisuke
name: Mihara, Tatehiro
name: Akazawa, Hidehiko
name: Gendreau, Keith C.
name: Hambsch, Franz-Josef
name: Dubovsky, Pavol A.
name: Kudzej, Igor
name: Kasai, Kiyoshi
name: Tordai, Tamás
name: Pavlenko, Elena
name: Sosnovskij, Aleksei A.
name: Babina, Julia V.
name: Antonyuk, Oksana I.
name: Itoh, Hiroshi
name: Maehara, Hiroyuki
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: SS Cyg has long been recognized as the prototype of a group of dwarf novae that show only outbursts. However, this object has entered a quite anomalous event in 2021, which at first appeared to be standstill, i.e., an almost constant luminosity state, observed in Z Cam-type dwarf novae. This unexpected event gives us a great opportunity to reconsider the nature of standstill in cataclysmic variables. We have observed this anomalous event and its forerunner, a gradual and simultaneous increase in the optical and X-ray flux during quiescence, through many optical telescopes and the X-ray telescopes NICER and NuSTAR. We have not found any amplification of the orbital hump during quiescence before the anomalous event, which suggests that the mass transfer rate did not significantly fluctuate on average. The estimated X-ray flux was not enough to explain the increment of the optical flux during quiescence via X-ray irradiation of the disk and the secondary star. It would be natural to consider that viscosity in the quiescent disk was enhanced before the anomalous event, which increased mass accretion rates in the disk and raised not only the optical flux but also the X-ray flux. We suggest that enhanced viscosity also triggered the standstill-like phenomenon in SS Cyg, which is considered to be a series of small outbursts. The inner part of the disk would always stay in the outburst state and only its outer part would be unstable against the thermal-viscous instability during this phenomenon, which is consistent with the observed optical color variations. This scenario is in line with our X-ray spectral analyses which imply that the X-ray emitting inner accretion flow became hotter than usual and vertically expanded and that it became denser and was cooled down after the onset of the standstill-like state.
description: Accepted for publication in PASJ. 18 pages, 10 figures, and 2 tables
The influence of salal on planted hemlock and cedar saplings on northern Vancouver Island
Creators: name: Fraser, Lauchlan
Publisher: name: University of British Columbia
Year: 2008

description: Through correlation analyses between 2- and 4-year-old conifer performance (western hemlock (Tsuga heterophylla (Raf.) Sarg.) and western red cedar (Thujaplicata Donn ex D. Don)) and salal (Gaultheria shallon Pursh) leaf area index, and the effect of salal leaf area index on the 2-year growth increment of western red cedar andwestern hemlock, this study determines the influence of salal on poorly growing western red cedar and western hemlock plantations growing on clear-cut and burned old-growth western red cedar and western hemlock stands in the Coastal Western Hemlock biogeoclimatic zone. This study was set up on a pre-existing experimental site involving 8 site x treatment combinations: 2 sites (cedar-hemlock and hemlock-fir) and 4 treatments (control, fertilized, scarified, and fertilized plus scarified). It is shown that increasing salal leaf area index reduces the growth of western hemlock more than western red cedar. When growing with western hemlock, it is inferred that salal is strongly competitive in control plots on CH sites, fertilized plots on CH sites, control plots on HA sites, and fertilized plots on HA sites. When growing with cedar, it is inferred that salal is wealdy competitive on fertilized plots on CH sites,and control plots on HA sites. However, the negative influence of salal on western red cedar only occurred on 2-year-old trees, not 4-year-old trees, suggesting that the influence is waning. For hemlock, the opposite occurred. It is concluded that scarification is the best way to reduce the influence of salal on western hemlock and western red cedar.
A Robust Test of Evolution near the Tip of the Red Giant Branch and Missing Giants in NGC 2808
Creators: name: Sandquist, Eric L.
name: Martel, André R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We describe a new method for robustly testing theoretical predictions of red giant evolution near the tip of the giant branch. When theoretical cumulative luminosity functions are shifted to align the tip in I-band and normalized at a luminosity level slightly brighter than the red giant bump, virtually all dependence on age and composition (heavy elements and helium abundance) is eliminated. While significant comparisons with observations require large samples of giant stars, such samples are available for some of the most massive Milky Way globular clusters. We present comparisons with the clusters NGC 2808 and M5, and find that NGC 2808 has a deficiency of bright giants (with a probability of less than about 3% that a more extreme distribution of giant stars would have happened by chance). We discuss the possibilities that underestimated neutrino losses or strong mass loss could be responsible for the deficit of giants. While we cannot rule out the neutrino hypothesis, it cannot explain the apparent agreement between the M5 observations and models. On the other hand, strong mass loss provides a potential link between the giant star observations and NGC 2808's unusually blue horizontal branch. If the mass loss hypothesis is true, there is likely a significant population of He white dwarfs that could be uncovered with slightly deeper UV observations of the cluster.
description: 6 pages, 2 figures, uses emulateapj, accepted for ApJ Letters
Nested weighted automata
Creators: name: Chatterjee, Krishnendu
name: Henzinger, Thomas
name: Otop, Jan
Publisher: name: IST Austria
Year: 2014
Subjects: 000 Computer science, knowledge & general works

description: Recently there has been a significant effort to add quantitative properties in formal verification and synthesis. While weighted automata over finite and infinite words provide a natural and flexible framework to express quantitative properties, perhaps surprisingly, several basic system properties such as average response time cannot be expressed with weighted automata. In this work, we introduce nested weighted automata as a new formalism for expressing important quantitative properties such as average response time. We establish an almost complete decidability picture for the basic decision problems for nested weighted automata, and illustrate its applicability in several domains.
Σύμβαση πρακτορείας επιχειρηματικών απαιτήσεων- Factoring
Creators: name: Χάσκου, Μάρθα Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Χρηματοδότηση
Πράκτορας
Εξαγωγέας
Financing
Factor
Forfaitist

description: Σκοπός της διπλωματικής εργασίας ήταν η μελέτη των σύγχρονων μορφών χρηματοδότησης και επιχειρηματικής συνεργασίας, οι οποίες έχουν γνωρίσει ιδιαίτερη ανάπτυξη στο εξωτερικό, ενώ τα τελευταία χρόνια έχουν γίνει ιδιαίτερα γνωστές και στη χώρα μας. Στη συνέχεια, παρουσιάσαμε αναλυτικά τα χαρακτηριστικά δύο από τους πιο καινοτόμους χρηματοοικονομικούς θεσμούς, εκτός από το Leasing και το Franchising, ήτοι το Factoring και το Forfaiting. Στη χώρα μας, ο νόμος 1905/1990 έχει καθιερώσει το θεσμό της πρακτορείας επιχειρηματικών απαιτήσεων, ο οποίος περιλαμβάνει στην ουσία το Factoring και το Forfaiting, ως μέσα χρηματοδότησης μικρομεσαίων επιχειρήσεων στο εγχώριο και εξαγωγικό εμπόριο αντίστοιχα. Βασικό κοινό χαρακτηριστικό των δύο συμβάσεων είναι η ανάληψη από τον πράκτορα της υποχρέωσης να παρέχει στον προμηθευτή τις υπηρεσίες του, είτε αυτές αφορούν στην παρακολούθηση των απαιτήσεων του τελευταίου (μόνο στη σύμβαση Factoring) έναντι των πελατών του, είτε αφορούν και την είσπραξη των εν λόγω απαιτήσεων από τους πελάτες του εξαγωγέα με ταυτόχρονη προεξόφληση του τελευταίου
description: The aim of this thesis was the study of modern forms of financing and business cooperation, which have experienced particular growth abroad, while in recent years have become very well known in our country. Then we presented in detail the characteristics of the two of the most innovative financial institutions, except Leasing and Franchising, namely Factoring and Forfaiting. In Greece, Law 1905/1990 has introduced the institution of factoring, which includes virtually the Factoring and Forfaiting, as means of financing in the domestic and export trade respectively. A key common feature of the two contracts is the commitment by the operator of the obligation to provide the supplier of the services, whether they relate to the monitoring requirements of the latter (only in Factoring contract) to its customers, either concern the recovery of such demands from the exporter customers while discounting the latter.
The inertia of stress
Creators: name: Medina, Rodrigo
Publisher: name: arXiv
Year: 2006
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: We present a simple example in which the importance of the inertial effects of stress is evident. The system is an insulating solid narrow disc whose faces are uniformly charged with charges of equal magnitude and opposite signs. The motion of the system in two different directions is considered. It is shown how the contributions to energy and momentum of the stress that develops inside the body to balance the electrostatic forces have to be added to the electromagnetic contributions to obtain the results predicted by the relativistic equivalence of mass and energy.
description: revtex4, 5 pages, 5 figures. Accepted by the American Journal of Physics
Optimal tree-decomposition balancing and reachability on low treewidth graphs
Creators: name: Chatterjee, Krishnendu
name: Ibsen-Jensen, Rasmus
name: Pavlogiannis, Andreas
Publisher: name: IST Austria
Year: 2014
Subjects: 000 Computer science, knowledge & general works

description: We consider graphs with n nodes together with their tree-decomposition that has b = O ( n ) bags and width t , on the standard RAM computational model with wordsize W = Θ (log n ) . Our contributions are two-fold: Our first contribution is an algorithm that given a graph and its tree-decomposition as input, computes a binary and balanced tree-decomposition of width at most 4 · t + 3 of the graph in O ( b ) time and space, improving a long-standing (from 1992) bound of O ( n · log n ) time for constant treewidth graphs. Our second contribution is on reachability queries for low treewidth graphs. We build on our tree-balancing algorithm and present a data-structure for graph reachability that requires O ( n · t 2 ) preprocessing time, O ( n · t ) space, and O ( d t/ log n e ) time for pair queries, and O ( n · t · log t/ log n ) time for single-source queries. For constant t our data-structure uses O ( n ) time for preprocessing, O (1) time for pair queries, and O ( n/ log n ) time for single-source queries. This is (asymptotically) optimal and is faster than DFS/BFS when answering more than a constant number of single-source queries.
Clause structure, agreement and case in Gitksan
Creators: name: Hunt, Katharine D.
Publisher: name: University of British Columbia
Year: 2008

description: This dissertation proposes an analysis of certain aspects of the syntax and morphology of Gitksan, a Tsimshianic language of northwestern British Columbia. In particular, the goal of the dissertation is to show that, despite claims and surface appearances to the contrary, the structure of a Gitksan sentence conforms to the putatively universal constraints on sentence structure proposed in Government and Binding theory. In order to defend this claim, I show that other structures which have been proposed for the language are not well-motivated by data, and that the structure I propose is able to account for the complex case and agreement facts observed in declarative Gitksan sentences. The thesis is structured in the following way. Chapter 1 briefly sketches the theoretical framework I assume, while Chapter 2 consists of a short introduction to some salient aspects of Gitksan phonology, morphology and syntax. Chapter 3 contains a comprehensive discussion of typological and structural properties of Gitksan sentences. I review those characteristics of the language which have led researchers to claim that Gitksan is either an ergative or a non-configurational language, but I argue that these surface characteristics do not provide compelling evidence that Gitksan should be assigned any divergent type of syntactic structure. On the contrary, I show that there is syntactic evidence in Gitksan to support a standard structure. I conclude Chapter 3 by examining a possible alternative proposal, namely that Gitksan is a pronominal argument language.’ Once again, however, I argue that the data are more consistent with a conservative account- in this case, one in which nominals function as arguments rather than adjuncts. In Chapter 4, I present in some detail data relating to agreement, case and the distribution of overt and silent pronominals in Gitksan, showing how these complex data can be accounted for under the structure I assume. The analysis presented in this chapter has important consequences for the treatment of morphological agreement and case in GB theory.
Harer-Zagier formulas for knot matrix models
Creators: name: Morozov, Alexei
name: Popolitov, Aleksandr
name: Shakirov, Shamil
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Geometric Topology (math.GT)
subject: Quantum Algebra (math.QA)
subject: Representation Theory (math.RT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Knot matrix models are defined so that the averages of characters are equal to knot polynomials. From this definition one can extract single trace averages and generation functions for them in the group rank - which generalize the celebrated Harer-Zagier formulas for Hermitian matrix model. We describe the outcome of this program for HOMFLY-PT polynomials of various knots. In particular, we claim that the Harer-Zagier formulas for torus knots factorize nicely, but this does not happen for other knots. This fact is mysteriously parallel to existence of explicit beta = 1 eigenvalue model construction for torus knots only, and can be responsible for problems with construction of a similar model for other knots.
Vector spaces as unions of proper subspaces
Creators: name: Khare, Apoorva
Publisher: name: arXiv
Year: 2008
Subjects: subject: Commutative Algebra (math.AC)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 15A03

description: In this note, we find a sharp bound for the minimal number (or in general, indexing set) of subspaces of a fixed (finite) codimension needed to cover any vector space V over any field. If V is a finite set, this is related to the problem of partitioning V into subspaces.
description: 8 pages, LaTex; to appear in "Linear Algebra and its Applications"
Supplementary Material from Can mass drug administration of moxidectin accelerate onchocerciasis elimination in Africa?
Creators: name: Kura, Klodeta
name: Milton, Philip
name: Hamley, Jonathan I. D.
name: Walker, Martin
name: Bakajika, Didier K.
name: Kanza, Eric M.
name: Opoku, Nicholas O.
name: Howard, Hayford
name: Nigo, Maurice M.
name: Asare, Sampson
name: Olipoh, George
name: Attah, Simon K.
name: Mambandu, Germain L.
name: Kennedy, Kambale Kasonia
name: Kataliko, Kambale
name: Mumbere, Mupenzi
name: Halleux, Christine M.
name: Hopkins, Adrian
name: Kuesel, Annette C.
name: Kinrade, Sally
name: Basáñez, Maria-Gloria
Publisher: name: The Royal Society
Year: 2023

description: Epidemiological and modelling studies suggest that elimination of Onchocerca volvulus transmission (EoT) throughout Africa may not be achievable with annual mass drug administration (MDA) of ivermectin alone, particularly in areas of high endemicity and vector density. Single-dose Phase II and III clinical trials demonstrated moxidectin's superiority over ivermectin for prolonged clearance of O. volvulus microfilariae. We used the stochastic, individual-based EPIONCHO-IBM model to compare the probabilities of reaching EoT between ivermectin and moxidectin MDA for a range of endemicity levels (30% to 70% baseline microfilarial prevalence), treatment frequencies (annual and biannual) and therapeutic coverage/adherence values (65% and 80% of total population, with, respectively, 5% and 1% of systematic non-adherence). EPIONCHO-IBM's projections indicate that biannual (six-monthly) moxidectin MDA can reduce by half the number of years necessary to achieve EoT in mesoendemic areas and might be the only strategy that can achieve EoT in hyperendemic areas. Data needed to improve modelling projections include (i) the effect of repeated annual and biannual moxidectin treatment; (ii) inter- and intra-individual variation in response to successive treatments with moxidectin or ivermectin; (iii) the effect of moxidectin and ivermectin treatment on L3 development into adult worms and (iv) patterns of adherence to moxidectin and ivermectin MDA.This article is part of the theme issue ‘Challenges in the Fight Against Neglected Tropical Diseases’.