cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Ground-state Competition of Two-Component Bosons in Optical Lattice near a Feshbach Resonance
Creators: name: Guo, Liping
name: Zhang, Yunbo
name: Chen, Shu
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We investigate the ground state properties of an equal mixture of two species of bosons in its Mott-insulator phase at a filling factor two per site. We identify one type of spin triplet-singlet transition through the competition of ground state. When the on-site interaction is weak ($UU_c$), higher band will be populated. Due to the orbital coupling term $S^+S^-$ in the Hamiltonian, the two atoms in different orbits on a site would form an on-site singlet. For a non-SU(2)-symmetric model, easy-axis or easy-plane ferromagnetic spin exchange models may be realized corresponding to phase separation or counter-flow superfluidity, respectively.
description: Final version in PRA
Performance versus Complexity Study of Neural Network Equalizers in Coherent Optical Systems
Creators: name: Freire, Pedro J.
name: Osadchuk, Yevhenii
name: Spinnler, Bernhard
name: Napoli, Antonio
name: Schairer, Wolfgang
name: Costa, Nelson
name: Prilepsky, Jaroslaw E.
name: Turitsyn, Sergei K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We present the results of the comparative analysis of the performance versus complexity for several types of artificial neural networks (NNs) used for nonlinear channel equalization in coherent optical communication systems. The comparison has been carried out using an experimental set-up with transmission dominated by the Kerr nonlinearity and component imperfections. For the first time, we investigate the application to the channel equalization of the convolution layer (CNN) in combination with a bidirectional long short-term memory (biLSTM) layer and the design combining CNN with a multi-layer perceptron. Their performance is compared with the one delivered by the previously proposed NN equalizer models: one biLSTM layer, three-dense-layer perceptron, and the echo state network. Importantly, all architectures have been initially optimized by a Bayesian optimizer. We present the derivation of the computational complexity associated with each NN type -- in terms of real multiplications per symbol so that these results can be applied to a large number of communication systems. We demonstrated that in the specific considered experimental system the convolutional layer coupled with the biLSTM (CNN+biLSTM) provides the highest Q-factor improvement compared to the reference linear chromatic dispersion compensation (2.9 dB improvement). We examine the trade-off between the computational complexity and performance of all equalizers and demonstrate that the CNN+biLSTM is the best option when the computational complexity is not constrained, while when we restrict the complexity to lower levels, the three-layer perceptron provides the best performance. Our complexity analysis for different NNs is generic and can be applied in a wide range of physical and engineering systems.
Metastable States in Two-Lane Traffic Flow Models With Slow-To-Start Rule
Creators: name: Moussa, Najem
Publisher: name: arXiv
Year: 2006
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Using computer simulations, we show that metastable states still occur in two-lane traffic models with slow to start rules. However, these metastable states no longer exist in systems where aggressive drivers (\textit{which do not look back before changing lanes}) are present. Indeed, the presence of only one aggressive driver in the circuit, triggers the breakdown of the high flow states. In these systems, the steady state is unique and its relaxation dynamics should depend on the lane changing probability $p_{ch}$ and the number of aggressive drivers present in the circuit. It is found also that the relaxation time $τ$ diverges as the form of a power-law : $τ\propto p_{ch}^{-β}, β=1$.
description: 7 pages, 6 figures
Spitzer Space Telescope Observations of Kepler's Supernova Remnant: A Detailed Look at the Circumstellar Dust Component
Creators: name: Blair, William P.
name: Ghavamian, Parviz
name: Long, Knox S.
name: Williams, Brian J.
name: Borkowski, Kazimierz J.
name: Reynolds, Stephen P.
name: Sankrit, Ravi
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present 3.6 - 160 micron infrared images of Kepler's supernova remnant (SN1604) obtained with the IRAC and MIPS instruments on the Spitzer Space Telescope. We also present MIPS SED low resolution spectra in the 55 - 95 micron region. The observed emission in the MIPS 24 micron band shows the entire shell. Emission in the MIPS 70 micron and IRAC 8 micron bands is seen only from the brightest regions of 24 micron emission, which also correspond to the regions seen in optical Halpha images. Shorter wavelength IRAC images are increasingly dominated by stars, although faint filaments are discernible. The SED spectrum of shows a faint continuum dropping off to longer wavelengths and confirms that strong line emission does not dominate the mid-IR spectral region. The emission we see is due primarily to warm dust emission from dust heated by the primary blast wave; no excess infrared emission is observed in regions where supernova ejecta are seen in X-rays. We use models of the dust to interpret the observed 70/24 micron ratio and constrain the allowed range of temperatures and densities. We estimate the current mass of dust in the warm dust component to be 5.4 x 10^{-4} solar masses, and infer an original mass of about 3 x 10^{-3} solar masses before grain sputtering. The MIPS 160 micron band shows no emission belonging to the remnant. We place a conservative but temperature dependent upper limit on any cold dust component roughly a factor of 10 below the cold dust mass inferred from SCUBA observations. Finally, we comment on issues relevant to the possible precursor star and the supernova type.
description: 43 pages, 9 figures
Σύστημα αυτοματοποιημένης αξιολόγησης πηγαίου κώδικα
Creators: name: Αθανασιάδης, Παύλος Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Διαδικτυακή εφαρμογή
Σύστημα αυτόνομης αξιολόγησης
Ηλεκτρονικό σύστημα βαθμολόγησης
Web application
Autonomous assessment
Online Grading System

description: Η παρούσα διπλωματική εργασία αφορά το σχεδιασμό και την ανάπτυξη μιας διαδικτυακής εφαρμογής, αναπτυγμένης με εργαλεία ανοιχτού κώδικα, που θα χρησιμοποιείται για εκπαιδευτικούς σκοπούς για την αξιολόγηση κώδικα γραμμένο στη γλώσσα προγραμματισμού C. Η εφαρμογή αυτή αποσκοπεί στη διευκόλυνση του εκπαιδευτικού έργου, τόσο του διδάσκοντα όσο και του φοιτητή, δεδομένου ότι παρέχει τη δυνατότητα της αυτοματοποιημένης αξιολόγησης του κώδικα και της άμεσης εμφάνισης των αποτελεσμάτων. Πρόκειται για ένα σύστημα με δύο διακριτούς ρόλους, τον διδάσκοντα – διαχειριστή και τον φοιτητή, καθένας από τους οποίους έχει διαφορετικά δικαιώματα. Αρχικά γίνεται μια εισαγωγή σε βασικές έννοιες οι οποίες σχετίζονται με το αντικείμενο. Εν συνεχεία γίνεται μια γενική περιγραφή του εγχειρήματος. Και τέλος, γίνεται αναφορά στις λειτουργίες που απαρτίζουν το σύστημα διαχωρίζοντας τες ανά ρόλο χρήστη
description: This diploma thesis concerns the design and development of a web-based application developed with open source tools to be used for educational purposes to evaluate a code written in programming language C. This application aims at facilitating the teaching work of both the lecturer and the student, as it provides the possibility of automated code evaluation and immediate display of results. It is a system with two distinct roles, the teacher-manager and the student, each of whom has different rights. Initially, an introduction to basic concepts related to the subject is made. Then a general description of the operation takes place. Finally, reference is made to the functions that make up the system by separating them by user role
"HALOLLIK" UMUMIY SEMALI ATOV BIRLIKLARNING SEMANTIK STRUKTURASI
Creators: name: Xo'jayeva, Umida
Publisher: name: Zenodo
Year: 2024

description: Mazkur maqolada “Halollik” umumiy semali atov birliklarning semantik strukturasi tahlil etilgan. Tahlil jarayonida o‘zbek tilidagi halollikka oid leksimalarning turli nutq jarayonlarida voqelanishi yoritilgan. Maqolada “halollik” umumiy ma’noli atov birliklarning semantik strukturasini analiz qilish jarayoni badiiy matnlar hamda ilmiy manbalarga tayanilgan holda yoritilgan.
On the generation of multipartite entangled states in Josephson architectures
Creators: name: Migliore, Rosanna
name: Yuasa, Kazuya
name: Nakazato, Hiromichi
name: Messina, Antonino
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose and analyze a scheme for the generation of multipartite entangled states in a system of inductively coupled Josephson flux qubits. The qubits have fixed eigenfrequencies during the whole process in order to minimize decoherence effects and their inductive coupling can be turned on and off at will by tuning an external control flux. Within this framework, we will show that a W state in a system of three or more qubits can be generated by exploiting the sequential one by one coupling of the qubits with one of them playing the role of an entanglement mediator.
description: 10 pages, 3 figures
Phase analyses for compact, charged boson stars and shells harboring black holes in the $\mathbb{C}P^N$ nonlinear sigma model
Creators: name: Sawado, Nobuyuki
name: Yanai, Shota
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Phase diagrams of the boson stars and shells of the $U(1)$ gauged $\mathbb{C}P^N$ nonlinear sigma model are studied. The solutions of the model exhibit both the ball- and the shell-shaped charge density depending on $N$. There appear four independent regions of the solutions which are essentially caused from the coexistence of electromagnetism and gravity. We examine several phase diagrams of the boson stars and the shells and discuss what and how the regions are emerged. A coupling with gravity allows for harboring of the charged black holes for the $Q$-shell solutions. Some solutions are strongly affected by the presence of the black holes and they allow to be smoothly connected. As a result, the regions are integrated by the harboring black holes.
description: 12 pages, 10 figures. v2:Journal version. arXiv admin note: text overlap with arXiv:2006.03424
The cosmological implications of a fundamental length: a DSR inspired de-Sitter spacetime
Creators: name: Khosravi, N.
name: Sepangi, H. R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study a de-Sitter model in the framework of a Deformed Special Relativity (DSR) inspired structure. The effects of this framework appear as the existence of a fundamental length which influences the behavior of the scale factor. We show that such a deformation can either be used to control the unbounded growth of the scale factor in the present accelerating phase or account for the inflationary era in the early evolution of the universe.
description: 10 pages, 3 figures, to appear in JCAP
Invariant quantities of Scalar-Tensor Theories for stellar structure
Creators: name: Kozak, Aleksander
name: Wojnar, Aneta
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present the relativistic hydrostatic equilibrium equations for a wide class of gravitational theories possessing a scalar-tensor representation. It turns out that the stellar structure equations can be written with respect to the scalar-tensor invariants, allowing to interpret their physical role.
description: 13 pages, 2 tables, version accepted to EPJC
Unbounded regions of Infinitely Logconcave Sequences
Creators: name: Uminsky, David
name: Yeats, Karen
Publisher: name: arXiv
Year: 2007
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: Primary 05A10; Secondary 39B12

description: We study the properties of a logconcavity operator on a symmetric, unimodal subset of finite sequences. In doing so we are able to prove that there is a large unbounded region in this subset that is $\infty$-logconcave. This problem was motivated by the conjecture of Moll and Boros in that the binomial coefficients are $\infty$-logconcave.
description: 12 pages, final version incorporating referee's comments. Now published by the Electronic Journal of Combinatorics http://www.combinatorics.org/index.html
Family characteristics of anorexic, bulimic, psychiatric control, and nonpsychiatric control female adolescents
Creators: name: Taylor, Lori Anne
Publisher: name: University of British Columbia
Year: 2008

description: The aim of the present study was to investigate the characteristics and interaction patterns in the families of adolescent eating—disordered patients. Four groups of female adolescents and their mothers (restrictive anorexic, bulimic type, psychiatric control, and nonpsychiatric control) were assessed on a number of self-report instruments: The Family Environment Scale, Dyadic Adjustment Scale, Work and Family Orientation Questionnaire, Sex Role Ideology Scale, Food Fitness and Looks Questionnaire, and Body Esteem Scale. Support was found for the hypothesis that the families of bulimic type and psychiatric control subjects are characterized as more dysfunctional than the families of restrictive anorexic and nonpsychiatric control subjects. In particular, restrictive anorexic and nonpsychiatric control mothers and daughters characterized their families as more cohesive than did bulimic type and psychiatric control mothers and daughters. No differences were found amongst the four groups on expressiveness, conflict, independence, organization, control, or marital adjustment. These family interaction data were found to vary with the adolescent’s level of depression, general psychiatric distress, and impulsivity, but only for daughters, not for mothers. Little support was found for the hypothesis that restrictive anorexic and bulimic type mothers and daughters are characterized as higher in achievement orientation, traditional sex role ideology, and weight and appearance orientation than psychiatric control mothers and daughters. There were no group differences with respect to individual or family achievement orientation; however, restrictive anorexic and nonpsychiatric control daughters did have higher school grades than psychiatric control daughters. No differences in sex role ideology were found amongst the groups. Restrictive anorexic and bulimic type daughters, but not mothers, ascribed greater importance to weight and had more negative attitudes toward their own weight than psychiatric and nonpsychiatric control daughters. No group differences were found for mothers or daughters with respect to attitude toward one’s own attractiveness or importance ascribed to appearance or fitness. Potential explanations for lack of congruence with the theoretical literature are advanced, and the possible specificity of family pseudocohesiveness and problem denial to eating disorders is discussed.
Phonological elicitation: Glottal stops and ejectives
Creators: name: Sales, Henry
name: Bertet, Denis
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: mam

description: Elicitation of words that feature word-final glottal stops (<'>) or uvular (), plain velar (), and palatalized velar () ejective stops, or that feature such phonemes in their San Ildefonso Ixtahuacán Mam cognates.
Fundamental Bounds on the Performance of Monochromatic Passive Cloaks
Creators: name: Jelinek, Lukas
name: Gustafsson, Mats
name: Capek, Miloslav
name: Schab, Kurt
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Fundamental bounds on the performance of monochromatic scattering-cancellation and field-zeroing cloaks made of prescribed linear passive materials occupying a predefined design region are formulated by projecting field quantities onto a sub-sectional basis and applying quadratically constrained quadratic programming. Formulations are numerically tested revealing key physical trends as well as advantages and disadvantages between the two classes of cloaks. Results show that the use of low-loss materials with high dielectric contrast affords the highest potential for effective cloaking.
description: 15 pages, 4 figures
The Quantum Dynamics of Heterotic Vortex Strings
Creators: name: Tong, David
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the quantum dynamics of vortex strings in N=1 SQCD with U(N_c) gauge group and N_f=N_c quarks. The classical worldsheet of the string has N=(0,2) supersymmetry, but this is broken by quantum effects. We show how the pattern of supersymmetry breaking and restoration on the worldsheet captures the quantum dynamics of the underlying 4d theory. We also find qualitative matching of the meson spectrum in 4d and the spectrum on the worldsheet.
description: 13 pages
Power, resistance and the law in a British Columbia land title trial
Creators: name: Solnick, Tim
Publisher: name: University of British Columbia
Year: 2008

description: In Canada the law and the law courts have played and continue to play a prominent part in First Nations struggles for self-government and for their land. As such, the role of law demands assessment. Is the legalization of these struggles working to diffuse the efforts of the First Nations? Or do the law and the courts facilitate the process of decolonization in Canada? In this thesis, I investigate these questions with respect to a 1992 British Columbia Supreme Court trial, Delgamuukw v. Province of British Columbia and the Attorney-General of Canada. In this case, the Gitksan and Wet'suwet'en First Nations sued the province of British Columbia for ownership and jurisdiction of their territories. Analysing this trial, I suggest first, that the practices and procedures of the legal process reinforced colonialist power relations. The decision to the trial configures strategies of colonization with legal knowledge practices, and re-writes the Gitksan and Wet'suwet'en struggle for their land into legal question formulated on the basis of colonialist discourses. As a site of debate, the court-room encourages the configuration of legal and colonial modes of power because its form and structure promote the exclusion and devalorization of First Nations discourses and knowledges. But, secondly, the specific aspects of the trial indicate that First Nations use of and resistance in the court-room has the potential to enter into and substantively alter the law. Gitksan and Wet'suwet'en people and their lawyers use the court-room, its procedures and the knowledge practices associated with them, such as mapping and writing, to oppose the operations of colonialist strategies. The emergence of a group of lawyers who accept the validity of First Nations knowledge in court, in association with these resistances, suggests the possibility for substantive changes to the law. Inherent in the struggle of this group of lawyers for control over the means of legal interpretation is the potential for the widespread legitimation of First Nations knowledges and discourses in the legal sphere. In this way, my analysis indicates that during Delgamuukw the law and the courts operated in a dual fashion, on the one hand working with colonialist power, but on the other providing space for First Nations resistance to that power; it also underscores the efficacy of that resistance.
Identifying Collective Modes via Impurities in the Cuprate Superconductors
Creators: name: Nyberg, Roy H.
name: Rossi, Enrico
name: Morr, Dirk K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We show that the pinning of collective charge and spin modes by impurities in the cuprate superconductors leads to qualitatively different fingerprints in the local density of states (LDOS). In particular, in a pinned (static) spin droplet, the creation of a resonant impurity state is suppressed, the spin-resolved LDOS exhibits a characteristic spatial pattern, and the LDOS undergoes significant changes with increasing magnetic field. Since all of these fingerprints are absent in a charge droplet, impurities are a new probe for identifying the nature and relative strength of collective modes.
description: 4 pages, 4 figures
title: Umgang mit jüdischem Grundeigentum, Rothenbaumchaussee 38
Creators: name: Althoff, Hendrik
Publisher: name: Institut für die Geschichte der deutschen Juden
Year: 2021
Subjects: subject: Erinnern und Gedenken
subject: Organisationen und Institutionen
subject: Recht und Politik

description: Die Schwarz-Weiß-Fotografie zeigt die Fassade des Verwaltungsgebäudes der Jüdischen Gemeinde in Hamburg (JGH) in der Rothenbaumchaussee 38. Eine unbekannte Person hat das Bild schräg aus dem Vorgarten aufgenommen, sodass auch das linke Nachbarhaus zu sehen ist. Im Zentrum des Bildes weht eine etwa zwei Meter lange Israelflagge an einer Fahnenstange, die von einem Balkon im zweiten Obergeschoss des Gebäudes in Richtung Straße ragt. Der Widmung auf der Rückseite des Fotos zufolge wurde es am 14.5.1949 aufgenommen, dem ersten Jahrestag der Staatsgründung Israels. Der erste Vorsitzende der 1945 gegründeten Jüdischen Gemeinde in Hamburg, Harry Goldstein, schickte das Bild an Carl Heinz Rosner, der 1929 in Hamburg geboren wurde und nach der Flucht seiner Eltern vorübergehend unter der Vormundschaft Goldsteins gestanden hatte. Rosner hatte das Konzentrationslager Buchenwald überlebt, wohin er im Juni 1944 deportiert worden war, und war nach dem Krieg nach Schweden und 1948 nach Israel emigriert. Heute lebt er in den USA. Das Foto ist Teil seiner Dokumentensammlung, die im Archiv des United States Holocaust Memorial Museum liegt.
Custodial Symmetry and Extensions of the Standard Model
Creators: name: Montero, J. C.
name: Pleitez, V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show that the extension of the approximate custodial $SU(2)_{L+R}$ global symmetry to all the Yukawa interactions of the standard model Lagrangian implies the introduction of sterile right-handed neutrinos and the seesaw mechanism in this sector. In this framework, the observed quark and lepton masses may be interpreted as an effect of physics beyond the standard model. The mechanism used for breaking this symmetry in the Yukawa sector could be different from the one at work in the vector boson sector. We give three model independent examples of these mechanisms.
description: RevTex, 12 pages and one eps figure. Extended version to be published in Physical Review D
RoboSTEAM School Meeting
Creators: name: Conde-González, M. Á.
Publisher: name: Zenodo
Year: 2019
Subjects: RoboSTEAM, Erasmus+, STEAM, Robots, Computational Thinking, EU

description: Introduction of the RoboSTEAM School Meeting held at Bragança, Portugal on July 17th 2019, related to the RoboSTEAM Erasmus+ Project (Ref. 2018-1-ES01-KA201-050939)
A proposal for relative in-flight flux self-calibrations for spectro-photometric surveys
Creators: name: Davini, S.
name: Risso, I.
name: Scodeggio, M.
name: Paganin, L.
name: Caprioli, S.
name: Bonici, M.
name: Caminata, A.
name: Di Domizio, S.
name: Testera, G.
name: Tosi, S.
name: Valerio, B.
name: Fumana, M.
name: Franzetti, P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present a method for the in-flight relative flux self-calibration of a spectro-photometer instrument, general enough to be applied to any upcoming galaxy survey on satellite. The instrument response function, that accounts for a smooth continuous variation due to telescope optics, on top of a discontinuous effect due to the segmentation of the detector, is inferred with a $χ^2$ statistics. The method provides unbiased inference of the sources count rates and of the reconstructed relative response function, in the limit of high count rates. We simulate a simplified sequence of observations following a spatial random pattern and realistic distributions of sources and count rates, with the purpose of quantifying the relative importance of the number of sources and exposures for correctly reconstructing the instrument response. We present a validation of the method, with the definition of figures of merit to quantify the expected performance, in plausible scenarios.
description: Updated to the version accepted by the journal for publication
Functional-renormalization-group approach to classical liquids with short-range repulsion: a scheme without repulsive reference system
Creators: name: Yokota, Takeru
name: Haruyama, Jun
name: Sugino, Osamu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The renormalization-group approaches for classical liquids in previous works require a repulsive reference such as a hard-core one when applied to systems with short-range repulsion. The need for the reference is circumvented here by using a functional renormalization group approach for integrating the hierarchical flow of correlation functions along a path of variable interatomic coupling. We introduce the cavity distribution functions to avoid the appearance of divergent terms and choose a path to reduce the error caused by the decomposition of higher order correlation functions. We demonstrate using an exactly solvable one-dimensional models that the resulting scheme yields accurate thermodynamic properties and interatomic distribution at various densities when compared to integral-equation methods such as the hypernetted chain and the Percus-Yevick equation, even in the case where our hierarchical equations are truncated with the Kirkwood superposition approximation, which is valid for low-density cases.
description: 17 pages, 7 figures, v2: some sentences added, some subsections added, minor modifications for figures and sentences made, references added
The structure of the jet in 3C 15 from multi-band polarimetry
Creators: name: Dulwich, F.
name: Worrall, D. M.
name: Birkinshaw, M.
name: Padgett, C. A.
name: Perlman, E. S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the structure of the kpc-scale jet in the nearby (z = 0.073) radio galaxy 3C 15, using new optical Hubble Space Telescope (HST) ACS/F606W polarimetry together with archival multi-band HST imaging, Chandra X-ray data and 8.4 GHz VLA radio polarimetry. The new data confirm that synchrotron radiation dominates in the optical. With matched beams, the jet is generally narrower in the optical than in the radio, suggesting a stratified flow. We examine a simple two-component model comprising a highly relativistic spine and lower-velocity sheath. This configuration is broadly consistent with polarization angle differences seen in the optical and radio data. The base of the jet is relatively brighter in the ultraviolet and X-ray than at lower energies, and the radio and optical polarization angles vary significantly as the jet brightens downstream. Further out, the X-ray intensity rises again and the apparent magnetic field becomes simpler, indicating a strong shock. Modelling the synchrotron spectrum of this brightest X-ray knot provides an estimate of its minimum internal pressure, and a comparison with the thermal pressure from X-ray emitting gas shows that the knot is overpressured and likely to be a temporary, expanding feature.
description: 12 pages, 7 figures, accepted by MNRAS
The MOSDEF Survey: The Mass-Metallicity relationship and the existence of the FMR at z~1.5
Creators: name: Topping, Michael W.
name: Shapley, Alice E.
name: Sanders, Ryan L.
name: Kriek, Mariska
name: Reddy, Naveen A.
name: Coil, Alison L.
name: Mobasher, Bahram
name: Siana, Brian
name: Freeman, William R.
name: Shivaei, Irene
name: Azadi, Mojegan
name: Price, Sedona H.
name: Leung, Gene C. K.
name: Fetherolf, Tara
name: de Groot, Laura
name: Zick, Tom
name: Fornasini, Francesca M.
name: Barro, Guillermo
name: Runco, Jordan N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We analyze the rest-optical emission-line ratios of z~1.5 galaxies drawn from the MOSFIRE Deep Evolution Field (MOSDEF) survey. Using composite spectra we investigate the mass-metallicity relation (MZR) at z~1.5 and measure its evolution to z=0. When using gas-phase metallicities based on the N2 line ratio, we find that the MZR evolution from z~1.5 to z=0 depends on stellar mass, evolving by $Δ\rm log(\rm O/H)\sim0.25$ dex at $M_*<10^{9.75}M_{\odot}$ down to $Δ\rm log(\rm O/H)\sim0.05$ at $M_*>10^{10.5}M_{\odot}$. In contrast, the O3N2-based MZR shows a constant offset of $Δ\rm log(\rm O/H)\sim0.30$ across all masses, consistent with previous MOSDEF results based on independent metallicity indicators, and suggesting that O3N2 provides a more robust metallicity calibration for our z~1.5 sample. We investigated the secondary dependence of the MZR on SFR by measuring correlated scatter about the mean $M_*$-specific SFR and $M_*-\log(\rm O3N2)$ relations. We find an anti-correlation between $\log(\rm O/H)$ and sSFR offsets, indicating the presence of a $M_*$-SFR-Z relation, though with limited significance. Additionally, we find that our z~1.5 stacks lie along the z=0 metallicity sequence at fixed $μ=\log(M_*/M_{\odot})-0.6\times\log(\rm SFR / M_{\odot} yr^{-1})$ suggesting that the z~1.5 stacks can be described by the z=0 fundamental metallicity relation (FMR). However, using different calibrations can shift the calculated metallicities off of the local FMR, indicating that appropriate calibrations are essential for understanding metallicity evolution with redshift. Finally, understanding how [NII]/H$α$ scales with galaxy properties is crucial to accurately describe the effects of blended [NII] and H$α$ on redshift and H$α$ flux measurements in future large surveys utilizing low-resolution spectra such as with Euclid and the Roman Space Telescope.
description: 14 Pages, 9 figures, Accepted to MNRAS
Effects of Galaxy Formation on Thermodynamics of the Intracluster Medium
Creators: name: Nagai, Daisuke
name: Kravtsov, Andrey V.
name: Vikhlinin, Alexey
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present detailed comparisons of the intracluster medium (ICM) in cosmological Eulerian cluster simulations with deep Chandra observations of nearby relaxed clusters. To assess the impact of galaxy formation, we compare two sets of simulations, one performed in the non-radiative regime and another with radiative cooling and several physical processes critical to various aspects of galaxy formation: star formation, metal enrichment and stellar feedback. We show that the observed ICM properties outside cluster cores are well-reproduced in the simulations that include cooling and star formation, while the non-radiative simulations predict an overall shape of the ICM profiles inconsistent with observations. In particular, we find that the ICM entropy in our runs with cooling is enhanced to the observed levels at radii as large as half of the virial radius. We also find that outside cluster cores entropy scaling with the mean ICM temperature in both simulations and Chandra observations is consistent with being self-similar within current error bars. We find that the pressure profiles of simulated clusters are also close to self-similar and exhibit little cluster-to-cluster scatter. The X-ray observable-total mass relations for our simulated sample agree with the Chandra measurements to \~10%-20% in normalization. We show that this systematic difference could be caused by the subsonic gas motions, unaccounted for in X-ray hydrostatic mass estimates. The much improved agreement of simulations and observations in the ICM profiles and scaling relations is encouraging and the existence of tight relations of X-ray observables, such as Yx, and total cluster mass and the simple redshift evolution of these relations hold promise for the use of clusters as cosmological probes.
description: 14 pages, 6 figures. Matches version accepted to ApJ
Identifying key determinants of effective dietary weight management interventions for night shift workers: A mixed methods study
Creators: name: Davis, Corinne Susanne
Publisher: name: Monash University
Year: 2024
Subjects: classificationCode: 321099
subject: Nutrition and dietetics not elsewhere classified

description: Night shift workers are an essential part of our workforce population, who experience a greater risk of developing obesity, type 2 diabetes and cardiovascular disease. Compelling evidence suggests that night work is associated with disrupted circadian rhythms and eating patterns that heighten weight gain compared with non-shift workers. Current weight management guidance tailored for night shift workers is lacking. This Thesis identifies key determinants of effective weight management interventions for night shift workers via a mixed methods systematic literature review and a mixed methods evaluation of a world-first study - the Shifting Weight using Intermittent Fasting in night shift workers.
X-ray Localization of the Globular Cluster G1 with XMM-Newton
Creators: name: Kong, Albert K. H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present an accurate X-ray position of the massive globular cluster G1 by using XMM-Newton and the Hubble Space Telescope (HST). The X-ray emission of G1 has been detected recently with XMM-Newton. There are two possibilities for the origin of the X-ray emission. It can be either due to accretion of the central intermediate-mass black hole, or by ordinary low-mass X-ray binaries. The precise location of the X-ray emission might distinguish between these two scenarios. By refining the astrometry of the XMM-Newton and HST data, we reduced the XMM-Newton error circle to 1.5". Despite the smaller error circle, the precision is not sufficient to distinguish an intermediate-mass black hole and luminous low-mass X-ray binaries. This result, however, suggests that future Chandra observations may reveal the origin of the X-ray emission.
description: 4 pages, 2 figures; accepted for publication in ApJ
Statistical recovery of the BAO scale from multipoles of the beam-convolved 21cm correlation function
Creators: name: Kennedy, Fraser
name: Bull, Philip
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Despite being designed as an interferometer, the MeerKAT radio array (an SKA pathfinder) can also be used in autocorrelation (`single-dish') mode, where each dish scans the sky independently. Operating in this mode allows extremely high survey speeds to be achieved, albeit at significantly lower angular resolution. We investigate the recovery of the baryon acoustic oscillation (BAO) scale from multipoles of the redshift-space correlation function as measured by a low angular resolution 21cm intensity mapping survey of this kind. Our approach is to construct an analytic model of the multipoles of the correlation function and their covariance matrix that includes foreground contamination and beam resolution effects, which we then use to generate an ensemble of mock data vectors from which we attempt to recover the BAO scale. In line with previous studies, we find that recovery of the transverse BAO scale $α_{\perp}$ is hampered by the strong smoothing effect of the instrumental beam with increasing redshift, while the radial scale $α_\parallel$ is much more robust. The multipole formalism naturally incorporates transverse information when it is available however, and so there is no need to perform a radial-only analysis. In particular, the quadrupole of the correlation function preserves a distinctive BAO `bump' feature even for large smoothing scales. We also investigate the robustness of BAO scale recovery to beam model accuracy, severity of the foreground removal cuts, and accuracy of the covariance matrix model, finding in all cases that the radial BAO scale can be recovered in an accurate, unbiased manner.
description: Updated to MNRAS accepted version. 20 pages, 14 figures. For the busy reader: see Figs. 4, 5, and 8
Οι ψυχολογικές και κοινωνιολογικές προσεγγίσεις για το έγκλημα
Creators: name: Κουρκουλή, Χριστίνα Μαργαρίτα Ηλία
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: subject: Ψυχολογία
subject: Κοινωνιολογία
subject: Έγκλημα
subject: Psychology
subject: FOS: Psychology
subject: Sociology
subject: FOS: Sociology
subject: Crime

description: Σκοπός της διπλωματικής εργασίας ήταν η εξέταση των ψυχολογικών και κοινωνιολογικών θεωριών για το έγκλημα. Αναλύθηκαν, αρχικά, οι ψυχολογικές προσεγγίσεις που επιδιώκουν να δώσουν μία ερμηνεία στο εγκληματικό φαινόμενο αποδίδοντάς το σε παράγοντες σχετικούς με τον ψυχισμό του εγκληματία. Στη συνέχεια, έγινε αναφορά στις κοινωνιολογικές θεωρίες, οι οποίες προσεγγίζουν το έγκλημα από διαφορετική σκοπιά. Με βάση τις θεωρίες αυτές, τα αίτια που οδηγούν στο έγκλημα αποδίδονται στις κοινωνικές αλληλεπιδράσεις και συγκρούσεις. Το έγκλημα με βάση αυτές τις προσεγγίσεις δεν μπορεί να οφείλεται σε παράγοντες ατομικούς αλλά κοινωνικούς. Το ερώτημα που εξετάζεται ανάγεται στο κατά πόσο επαρκεί η κάθε προσέγγιση από μόνη της να ερμηνεύσει το εγκληματικό φαινόμενο ή απαιτείται μία συνδυαστική ερμηνεία προκειμένου να κατανοηθεί με τον καλύτερο δυνατό τρόπο το έγκλημα
description: The aim of the present thesis was to examine the psychological and sociological theories about crime. Initially, I examine the psychological approaches that seek to give an interpretation of the criminal phenomenon by attributing it to factors related to the criminal's psychological state. Then I presented the sociological theories, which approach the crime from a different perspective. Based on these theories, the causes that lead to crime can be attributed to social interactions and conflicts. Crime based on these approaches cannot be due to individual but social factors. The question under consideration is whether it is sufficient for each approach alone to interpret the criminal phenomenon or requires a combined interpretation in order to understand the crime in the best possible way
Σχεδιασμός και ανάπτυξη διαδικτυακής εφαρμογής στο Πανεπιστημιακό δάσος του Ταξιάρχη
Creators: name: Βουλγαρούδης, Στέφανος Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Διαδικτυακή εφαρμογή
Πανεπιστημιακό δάσος
Ταξιάρχης
Web application
University Forest
Taxiarhis

description: Το αντικείμενο της παρούσας μεταπτυχιακής εργασίας είναι o σχεδιασμός και η ανάπτυξη διαδικτυακής εφαρμογής για το Πανεπιστημιακού Δάσος του Ταξιάρχη. Για το σκοπό αυτό θα σχεδιαστεί διαδικτυακό πληροφοριακό σύστημα, με το λογισμικό Wordpress που στοχεύει στην ενημέρωση των επισκεπτών όπως και στην συγκέντρωση υλικού σχετικού με το δάσος. Γίνεται πλήρης περιγραφή της μεθοδολογίας που ακολουθήσαμε για την υλοποίηση, όπως επίσης και αναφορά για την αιτία που επιλέξαμε το συγκεκριμένο σύστημα. Η παρούσα εργασία χωρίζεται σε δύο μέρη, το θεωρητικό και το πρακτικό. Το θεωρητικό κομμάτι αναφέρεται γενικά στον ορισμό του διαδικτύου και της χρήσης του στη καθημερινότητα του χρήστη καθώς επίσης και στον τρόπο υλοποίησης του πρακτικού σχεδίου της εργασίας κάνοντας αναφορά σε κάποιες μελλοντικές επεκτάσεις που μπορούν να πραγματοποιηθούν στην ιστοσελίδα. Το πρακτικό κομμάτι αποτελείται αποκλειστικά από την ανάπτυξη της ιστοσελίδας. Κύριος στόχος μας είναι η ιστοσελίδα να περιλαμβάνει σημαντικές πληροφορίες σχετικά με το Πανεπιστημιακό Δάσος Ταξιάρχη με όσο τον δυνατόν πιο ευπαρουσίαστο τρόπο ώστε οι χρήστες να έχουν μία ευχάριστη περιήγηση. Ο σχεδιασμός σε συνδυασμό με την εισαγωγή εικόνων υψηλής ανάλυσης δίνουν στη σελίδα ξεχωριστή παρουσίαση προς το ευρύ κοινό. Τέλος η ανάπτυξη της ιστοσελίδας για έναν οργανισμό είναι σημαντική καθώς μέσω αυτής, ο ενδιαφερόμενος χρήστης μπορεί να έρθει άμεσα σε επαφή μαζί του
description: The main thesis objective is the development and the design of a web-based application of the University Forest Taxiarhis. To accomplish our goal, we will develop a web-based information system based on Wordpress which will aim to inform visitors and to gather Taxiarxis related material. We present the methodology of our implementation and we mention the reason why we selected this platform for the implementation of the website. This thesis consists of two parts, the theoretical part and the practical one. The theoretical part mentions terminology related with the web and how the web is useful in the human's life. Furthermore, this part mentions the techniques and the tools, we used, in the implementation of the website and it also indicates some future developments that can be made on the website. On the other hand, the practical part is related with the implementation of the website. The main aim of the website is to present useful information about the University Forest of Taxiarhis without adopting a complex website structure. The modern and careful design along with the available high definition images indicate the need of such a website for every organization. Finally, the website building for an organization is crucial due to the fact that people who are interested about such activities, have the opportunity to be informed and to easily contact with the organization
Ultralong-distance quantum correlations in three-terminal Josephson junctions
Creators: name: Mélin, Régis
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The production of entangled pairs of electrons in ferromagnet-superconductor-ferromagnet or normal metal-superconductor-normal metal three-terminal structures has aroused considerable interest in the last twenty years. In these studies, the distance between the contacts is limited by the zero-energy superconducting coherence length. Here, we demonstrate nonlocality and quantum correlations in voltage-biased three-terminal Josephson junctions over the ultralong distance that exceeds the superconducting coherence length by orders of magnitude. The effect relies on} the interplay between the time-periodic Floquet-Josephson dynamics, Cooper pair splitting and long-range coupling similar to the two-terminal Tomasch effect. We find cross-over between the ``Floquet-Andreev quartets'' (if the spatial separation is smaller than the superconducting coherence length), and the ``ultralong-distance Floquet-Tomasch clusters of Cooper pairs'' if the separation exceeds the superconducting coherence length, possibly reaching the same $\simeq 30\,μ$m as in the Tomasch experiments. The effect can be detected with DC-transport and zero-frequency quantum current-noise cross-correlation experiments, and it can be used for fundamental studies of superconducting quasiparticle quantum coherence in the circuits of quantum engineering.
description: Revised version: 21 pages, 11 figures, changes following suggestions of the Referees, discussion of AC-density of state oscillations added
Hypocrisy and heresy : language and concepts in early modern England
Creators: name: Stewart, Patricia Weightman
Publisher: name: University of British Columbia
Year: 2008

description: The two concepts of hypocrisy and heresy are completely disparate in modern use, and yet they were related in two ways during the early modern period. Firstly, both terms were prominent charges in the polemical exchanges of the English Reformation. Consequently, in this thesis they provide useful tools for studying the effects of controversy on language. The meaning of hypocrisy and of heresy was of considerable concern to many controversialists, and yet the resulting attempts at defining these terms contributed to their destabilization and incoherence. These terms were also related in a second respect throughout the early modern period. Given the universal conviction at that time that there was only one “true” church, and given the consequent pressures imposed by churches (both Catholic and Protestant) to enforce conformity to their own religions, it was inevitable that judgements had to be made concerning the convictions and internal beliefs of others. Such judgements were central in charges of heresy and hypocrisy; hence in this thesis the concepts of hypocrisy and heresy provide useful tools for studying early modern understandings of intentionality and judgement. The writings of Sir John Cheke, William Perkins, Bishop Joseph Hall and Sir Francis Bacon are shown to display concern combined with confusion and incoherence over these topics. However, Sir Thomas More’s Dialogue Concerning Heresies is shown to contain an intricate and coherent analysis of intentionality and judgement vis a vis heresy. But, More’s foundation for judgement and knowledge was the consensus fidelium, a foundation which simply was not available to the later Protestant writers. Lastly, Thomas Hobbes’s treatments of hypocrisy and heresy are examined. In effect, Hobbes negated the judgement of intentions where both concepts were concerned. He acknowledged and accepted the separation of internal belief from external profession. Likewise he accepted the impenetrable nature of the human mind and heart in a way his forebears had not. By examining Hobbes’s treatment of these concepts in light of the polemical confusion and conceptual incoherence of the preceeding century, a better understanding of Hobbes’s philosophy is obtained and the relevance of early modern theology for intellectual history is demonstrated.