cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Carrier Lifetimes in a III-V-N Intermediate Band Semiconductor
Creators: name: Heyman, J. N.
name: Schwartzberg, A. M.
name: Yu, K. M.
name: Luce, A. V.
name: Dubon, O. D.
name: Kuang, Y. J.
name: Tu, C. W.
name: Walukiewicz, W.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We have used transient absorption spectroscopy to measure carrier lifetimes in the multiband band semiconductor GaPAsN. These measurements probe the electron populations in the conduction band, intermediate band and valance band as a function of time after an excitation pulse. Following photoexcitation of GaP0.32As0.67N0.01 we find that the electron population in the conduction band decays exponentially with a time constant 23ps. The electron population in the intermediate band exhibits bimolecular recombination with recombination constant r = 2 10^-8 cm-3/s. In our experiment an optical pump pulse excited electrons from the valance band to the intermediate and conduction bands, and the change in interband absorption due to absorption saturation and induced absorption was probed with a delayed white light pulse. We modeled the optical properties of our samples using the band anti-crossing model to extract carrier densities as a function of time. These results indicate that the minority carrier lifetimes are too short for efficient solar power conversion and that improvements in material quality will be required for practical applications of GaPAsN based intermediate band solar cells.
description: 15 pages, 7 figures
Intracavity filtering in SESAM mode-locked fiber lasers: soliton effects and noise performance
Creators: name: Bogusławski, Jakub
name: Sterczewski, Łukasz
name: Stachowiak, Dorota
name: Soboń, Grzegorz
Publisher: name: arXiv
Year: 2024
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We characterized and analyzed the effect of intracavity spectral filtering in the Er:fiber laser mode-locked with a semiconductor saturable absorber mirror (SESAM). We studied the dispersive properties of bandpass filters and their influence on the characteristics of generated soliton pulses. Our analysis showed that various sideband structures were induced by the filter dispersion profiles and shaped through the interaction of the soliton with the dispersive wave. In addition, intracavity filtering improved the intensity and phase noise of the laser significantly, and we showed optimal filtering conditions for both types of noise. By adding a 10 nm bandpass filter to the laser resonator, the intensity and phase noise were improved 2- and 2.6 times, respectively.
description: 15 pages, 10 figures, 3 tables
Redundancy in English Translations of Chinese Patent Abstracts and its Effects on Accuracy, Readability and Reader Perception, and Implications for Quality Assurance in Professional Practice
Creators: name: Tsai, Yvonne
Publisher: name: IATIS and the Centre for Translation and Textual Studies (CTTS) at Dublin City University
Year: 2011
Subjects: patent abstract
patent translation
readability
redundancies
translation quality assessment

description: New Voices in Translation Studies, 7, 1, -
Writing through Translating and Translating through Writing: Antjie Krog as writer/translator
Creators: name: Vosloo, Frances Antoinette
Publisher: name: IATIS and the Centre for Translation and Textual Studies (CTTS) at Dublin City University
Year: 2011
Subjects: Antjie Krog
habitus
sociology of translation
self translation

description: New Voices in Translation Studies, 7, 1, -
LEMMA: Learning Language-Conditioned Multi-Robot Manipulation
Creators: name: Gong, Ran
name: Gao, Xiaofeng
name: Gao, Qiaozi
name: Shakiah, Suhaila
name: Thattai, Govind
name: Sukhatme, Gaurav S.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: Artificial Intelligence (cs.AI)
subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences

description: Complex manipulation tasks often require robots with complementary capabilities to collaborate. We introduce a benchmark for LanguagE-Conditioned Multi-robot MAnipulation (LEMMA) focused on task allocation and long-horizon object manipulation based on human language instructions in a tabletop setting. LEMMA features 8 types of procedurally generated tasks with varying degree of complexity, some of which require the robots to use tools and pass tools to each other. For each task, we provide 800 expert demonstrations and human instructions for training and evaluations. LEMMA poses greater challenges compared to existing benchmarks, as it requires the system to identify each manipulator's limitations and assign sub-tasks accordingly while also handling strong temporal dependencies in each task. To address these challenges, we propose a modular hierarchical planning approach as a baseline. Our results highlight the potential of LEMMA for developing future language-conditioned multi-robot systems.
description: 8 pages, 3 figures, accepted by RA-L
The Distribution of Dark and Luminous Matter in the Unique Galaxy Cluster Merger Abell 2146
Creators: name: King, Lindsay J.
name: Clowe, Douglas I.
name: Coleman, Joseph E.
name: Russell, Helen R.
name: Santana, Rebecca
name: White, Jacob A.
name: Canning, Rebecca E. A.
name: Deering, Nicole J.
name: Fabian, Andrew C.
name: Lee, Brandyn E.
name: Li, Baojiu
name: McNamara, Brian R.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Abell 2146 ($z$ = 0.232) consists of two galaxy clusters undergoing a major merger. The system was discovered in previous work, where two large shock fronts were detected using the $\textit{Chandra X-ray Observatory}$, consistent with a merger close to the plane of the sky, caught soon after first core passage. A weak gravitational lensing analysis of the total gravitating mass in the system, using the distorted shapes of distant galaxies seen with ACS-WFC on $\textit{Hubble Space Telescope}$, is presented. The highest peak in the reconstruction of the projected mass is centred on the Brightest Cluster Galaxy (BCG) in Abell 2146-A. The mass associated with Abell 2146-B is more extended. Bootstrapped noise mass reconstructions show the mass peak in Abell 2146-A to be consistently centred on the BCG. Previous work showed that BCG-A appears to lag behind an X-ray cool core; although the peak of the mass reconstruction is centred on the BCG, it is also consistent with the X-ray peak given the resolution of the weak lensing mass map. The best-fit mass model with two components centred on the BCGs yields $M_{200}$ = 1.1$^{+0.3}_{-0.4}$$\times$10$^{15}$M$_{\odot}$ and 3$^{+1}_{-2}$$\times$10$^{14}$M$_{\odot}$ for Abell 2146-A and Abell 2146-B respectively, assuming a mass concentration parameter of $c=3.5$ for each cluster. From the weak lensing analysis, Abell 2146-A is the primary halo component, and the origin of the apparent discrepancy with the X-ray analysis where Abell 2146-B is the primary halo is being assessed using simulations of the merger.
description: 12 pages, 9 figures, published in MNRAS
A Study of English-Indonesian Translation of Humor in Walt Disney’s Donald Duck Comics from a Pragmatic Perspective
Creators: name: Issy Yuliasri
Publisher: name: IATIS and the Centre for Translation and Textual Studies (CTTS) at Dublin City University
Year: 2011
Subjects: comics
cooperative maxims
humor
implicature
translation

description: New Voices in Translation Studies, 7, 1, -
Exact partition functions for the $Ω$-deformed $\mathcal N=2^{*}$ $SU(2)$ gauge theory
Creators: name: Beccaria, Matteo
name: Macorini, Guido
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the low energy effective action of the $Ω$-deformed $\mathcal N =2^{*}$ $SU(2) $ gauge theory. It depends on the deformation parameters $ε_{1},ε_{2}$, the scalar field expectation value $a$, and the hypermultiplet mass $m$. We explore the plane $(\frac{m}{ε_{1}}, \frac{ε_{2}}{ε_{1}})$ looking for special features in the multi-instanton contributions to the prepotential, motivated by what happens in the Nekrasov-Shatashvili limit $ε_{2}\to 0$. We propose a simple condition on the structure of poles of the $k$-instanton prepotential and show that it is admissible at a finite set of points in the above plane. At these special points, the prepotential has poles at fixed positions independent on the instanton number. Besides and remarkably, both the instanton partition function and the full prepotential, including the perturbative contribution, may be given in closed form as functions of the scalar expectation value $a$ and the modular parameter $q$ appearing in special combinations of Eisenstein series and Dedekind $η$ function. As a byproduct, the modular anomaly equation can be tested at all orders at these points. We discuss these special features from the point of view of the AGT correspondence and provide explicit toroidal 1-blocks in non-trivial closed form. The full list of solutions with 1, 2, 3, and 4 poles is determined and described in details.
description: 25 pages, one pdf figure. v2: references added
Magnetoelectrical control of nonreciprocal microwave response in a multiferroic helimagnet
Creators: name: Iguchi, Y.
name: Nii, Y.
name: Onose, Y.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Control of physical property in terms of external fields is essential for contemporary technologies. The conductance can be controlled by a gate electric field in a field effect transistor, which is a main component of the integrated circuit. Optical phenomena induced by an electric field such as electroluminescence and electrochromism are useful for display and other technologies. Control of microwave propagation seems also imperative for future wireless communication technology. Microwave properties in solids are dominated mostly by magnetic excitations, which cannot be easily controlled by an electric field. One of the solutions for this problem is utilizing magnetically induced ferroelectrics (multiferroics). Here we show that microwave nonreciprocity, which is difference between oppositely propagating microwaves, can be reversed by the external electric field in a multiferroic helimagnet Ba$_2$Mg$_2$Fe$_{12}$O$_{22}$. This result offers a new avenue for the electrical control of microwave properties.
Two Groups of Red Giants with Distinct Chemical Abundances in the Bulge Globular Cluster NGC 6553 Through the Eyes of APOGEE
Creators: name: Tang, Baitian
name: Cohen, Roger E.
name: Geisler, Doug
name: Schiavon, Ricardo
name: Majewski, Steven R.
name: Villanova, Sandro
name: Carrera, Ricardo
name: Zamora, Olga
name: Garcia-Hernandez, D. A.
name: Shetrone, Matthew
name: Frinchaboy, Peter
name: Meza, Andres
name: Fernández-Trincado, J. G.
name: Muñoz, Ricardo R.
name: Lin, Chien-Cheng
name: Lane, Richard R.
name: Nitschelm, Christian
name: Pan, Kaike
name: Bizyaev, Dmitry
name: Oravetz, Daniel
name: Simmons, Audrey
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Multiple populations revealed in globular clusters (GCs) are important windows to the formation and evolution of these stellar systems. The metal-rich GCs in the Galactic bulge are an indispensable part of this picture, but the high optical extinction in this region has prevented extensive research. In this work, we use the high resolution near-infrared (NIR) spectroscopic data from APOGEE to study the chemical abundances of NGC 6553, which is one of the most metal-rich bulge GCs. We identify ten red giants as cluster members using their positions, radial velocities, iron abundances, and NIR photometry. Our sample stars show a mean radial velocity of $-0.14\pm5.47$ km s$^{-1}$, and a mean [Fe/H] of $-0.15\pm 0.05$. We clearly separate two populations of stars in C and N in this GC for the first time. NGC 6553 is the most metal-rich GC where the multiple stellar population phenomenon is found until now. Substantial chemical variations are also found in Na, O, and Al. However, the two populations show similar Si, Ca, and iron-peak element abundances. Therefore, we infer that the CNO, NeNa, and MgAl cycles have been activated, but the MgAl cycle is too weak to show its effect on Mg. Type Ia and Type II supernovae do not seem to have significantly polluted the second generation stars. Comparing with other GC studies, NGC 6553 shows similar chemical variations as other relatively metal-rich GCs. We also confront current GC formation theories with our results, and suggest possible avenues for improvement in the models.
description: MNRAS accepted
Discontinuous PWM Strategy with Frequency Modulation for Vibration Reduction in Asynchronous Machines
Creators: name: Ruiz-Gonzalez, A
name: Heredia-Larrubia, JR
name: Perez-Hidalgo, FM
name: Meco-Gutierrez, M
Publisher: name: arXiv
Year: 2024
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The objective of this research is to mitigate vibrations in induction motors. To achieve this goal, a discontinuous pulse width modulation (PWM) control strategy based on carrier wave modulation is proposed for multilevel inverters. This study provides justification for the reduction of machine vibrations compared to existing control techniques documented in the technical literature. Additionally, the proposed technique offers the advantage of attenuating the Total Harmonic Distortion of the multilevel inverter's output voltage while simultaneously achieving a higher RMS value for the same DC level. By modifying a parameter of the carrier wave, the control strategy allows for variations in the electrical spectrum while avoiding natural mechanical resonance frequencies, thereby reducing motor vibrations. Laboratory results demonstrating the application of different modulation strategies in a multilevel inverter for an induction motor and a comparison with the presented strategy are provided
title: Description of the Bratislava Regional Court records (1940-1945) at the Bratislava State Archive with a focus on abortion
Creators: name: Nešťáková, Denisa
Publisher: name: Herder-Institut für historische Ostmitteleuropaforschung – Institut der Leibniz-Gemeinschaft
Year: 2022
Subjects: subject: 943 Geschichte Mitteleuropas; Deutschlands

description: The description deals with one particular holding of the State Archive in Bratislava, that is the collection of the Regional Court in Bratislava (1940-1945) with focus on the topic of abortion. The collection holds selected court case records related to the region of southwestern Slovakia including the capital Bratislava, towns such as Trnava, Sereď and Hlohovec, and numerous villages. It contains extensive holdings of criminal investigations carried out during the existence of the Slovak State, in particular in the years 1940-1945. These records include sixteen criminal cases against providers of abortion and women who were suspected of undergoing an abortion. The State Archive in Bratislava is the sole owner of these documents. The archive’s inventory description includes a geographical index and provides the historical context for the family politics of the Slovak State during the Second World War.
description: Die Beschreibung widmet sich einem Bestand des Staatsarchivs in Bratislava, nämlich der Sammlung von Gerichtsakten des Bezirksgerichts Bratislava (1940-1945) mit Schwerpunkt auf dem Thema Schwangerschaftsabbruch. Die Sammlung enthält ausgewählte Gerichtsakten, die sich auf die Region Südwestslowakei beziehen, darunter die Hauptstadt Bratislava, Städte wie Trnava, Sereď und Hlohovec sowie zahlreiche Dörfer. Der Bestand enthält umfangreiche Akten an strafrechtlichen Ermittlungen, die während des Bestehens des slowakischen Staates, insbesondere in den Jahren 1940-1945, durchgeführt wurden. Zu diesen Akten gehören sechzehn Strafverfahren gegen Anbieter von Abtreibungen und Frauen, die verdächtigt wurden, eine Abtreibung vorgenommen zu haben. Das Staatsarchiv in Bratislava ist der alleinige Eigentümer dieser Dokumente. Die Bestandsbeschreibung des Archivs enthält einen geografischen Index und bietet eine historische Kontextualisierung für die Familienpolitik des slowakischen Staates während des Zweiten Weltkriegs.
PUMA: The Positional Update and Matching Algorithm
Creators: name: Line, J. L. B.
name: Webster, R. L.
name: Pindor, B.
name: Mitchell, D. A.
name: Trott, C. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present new software to cross-match low-frequency radio catalogues: the Positional Update and Matching Algorithm (PUMA). PUMA combines a positional Bayesian probabilistic approach with spectral matching criteria, allowing for confusing sources in the matching process. We go on to create a radio sky model using PUMA based on the Murchison Widefield Array Commissioning Survey, and are able to automatically cross-match 98.5% of sources. Using the characteristics of this sky model, we create simple simulated mock catalogues on which to test PUMA, and find that PUMA can reliably find the correct spectral indices of sources, along with being able to recover ionospheric offsets. Finally, we use this sky model to calibrate and remove foreground sources from simulated interferometric data, generated using OSKAR (the Oxford University visibility generator). We demonstrate that there is a substantial improvement in foreground source removal when using higher frequency and higher resolution source positions, even when correcting positions by an average of 0.3 given a synthesized beam-width of 2.3.
description: Accepted for publication in Publications of the Astronomical Society of Australia (PASA) - 34 pages - 20 figures - PUMA github repository: https://github.com/JLBLine/PUMA
Word Connections Teacher Manual
Creators: name: Toste, Jessica R.
name: Capin, Philip
name: Williams, Kelly J.
name: Kearns, Devin M.
name: Vaughn, Sharon
Publisher: name: figshare
Year: 2022
Subjects: Other education not elsewhere classified
Special education and disability

description: The Word Connections Teacher Manual includes scripts for all 40 lessons. The introduction to the manual presents an overview of the program and descriptions of the lesson structure, instructional routines, and organization of materials. Please refer to the Instructional Scope & Sequence for a listing of the components included in each lesson and other specific activity details. The Teacher Reference section includes additional reference guides that summarize vowel patterns taught during warm-up, new affixes taught each lesson, word-building game descriptions, and key word definitions for text reading. For questions or to share feedback, please contact Dr. Jessica Toste via email or visit her website. Word Connections: A Multisyllabic Word Reading Program©
Lattice energies of molecular solids from the random phase approximation with singles corrections
Creators: name: Klimeš, Jiří
Publisher: name: arXiv
Year: 2016
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We use the random phase approximation (RPA) method with the singles correlation energy contributions to calculate lattice energies of ten molecular solids. While RPA gives too weak binding, underestimating the reference data by $13.7$\% on average, much improved results are obtained when the singles are included at the GW singles excitations (GWSE) level, with average absolute difference to the reference data of only $3.7$\%. Consistently with previous results, we find a very good agreement with the reference data for hydrogen bonded systems, while the binding is too weak for systems where dispersion forces dominate. In fact, the overall accuracy of the RPA+GWSE method is similar to an estimated accuracy of the reference data.
Quantum gate algorithm for reference-guided DNA sequence alignment
Creators: name: Varsamis, G. D.
name: Karafyllidis, I. G.
name: Gilkes, K. M.
name: Arranz, U.
name: Martin-Cuevas, R.
name: Calleja, G.
name: Dimitrakis, P.
name: Kolovos, P.
name: Sandaltzopoulos, R.
name: Jessen, H. C.
name: Wong, J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Biomolecules (q-bio.BM)
subject: Quantum Physics (quant-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Reference-guided DNA sequencing and alignment is an important process in computational molecular biology. The amount of DNA data grows very fast, and many new genomes are waiting to be sequenced while millions of private genomes need to be re-sequenced. Each human genome has 3.2 B base pairs, and each one could be stored with 2 bits of information, so one human genome would take 6.4 B bits or about 760 MB of storage (National Institute of General Medical Sciences). Today most powerful tensor processing units cannot handle the volume of DNA data necessitating a major leap in computing power. It is, therefore, important to investigate the usefulness of quantum computers in genomic data analysis, especially in DNA sequence alignment. Quantum computers are expected to be involved in DNA sequencing, initially as parts of classical systems, acting as quantum accelerators. The number of available qubits is increasing annually, and future quantum computers could conduct DNA sequencing, taking the place of classical computing systems. We present a novel quantum algorithm for reference-guided DNA sequence alignment modeled with gate-based quantum computing. The algorithm is scalable, can be integrated into existing classical DNA sequencing systems and is intentionally structured to limit computational errors. The quantum algorithm has been tested using the quantum processing units and simulators provided by IBM Quantum, and its correctness has been confirmed.
description: 19 pages, 13 figures
Kick it over - No. 17
Creators: name: :Unav
Publisher: name: University of Victoria Libraries
Year: 2020
Subjects: subject: Anarchism
valueUri: http://id.worldcat.org/fast/808387
subject: Social movements
valueUri: http://id.worldcat.org/fast/1122657
subject: Anarchism--Periodicals
valueUri: http://id.worldcat.org/fast/808394
subject: Anarchists
valueUri: http://id.worldcat.org/fast/808401

description: A social anarchist and anti-authoritarian quarterly publication. In this issue: Art and community, Red and green: Gorz and Bahro, Kirkpatrick Sale interview, Anarchy in Toronto: an oral history, Anarchy down on the farm, Eco-feminism.
Fatigue behavior of Cu-Zr metallic glasses under cyclic loading
Creators: name: Priezjev, Nikolai V.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The effect of oscillatory shear deformation on the fatigue life, yielding transition, and flow localization in metallic glasses is investigated using molecular dynamics simulations. We study a well-annealed Cu-Zr amorphous alloy subjected to periodic shear at room temperature. We find that upon loading for hundreds of cycles at strain amplitudes just below a critical value, the potential energy at zero strain remains nearly constant and plastic events are highly localized. By contrast, at strain amplitudes above the critical point, the plastic deformation is gradually accumulated upon continued loading until the yielding transition and the formation of a shear band across the entire system. Interestingly, when the strain amplitude approaches the critical value from above, the number of cycles to failure increases as a power-law function, which is consistent with the previous results on binary Lennard-Jones glasses.
description: 21 pages, 8 figures. arXiv admin note: text overlap with arXiv:2301.07857
Evolution of robustness in growing random networks
Creators: name: Tyloo, Melvyn
Publisher: name: arXiv
Year: 2023
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Networks are widely used to model the interaction between individual dynamical systems. In many instances, the total number of units as well as the interaction coupling are not fixed in time, but rather constantly evolve. In terms of networks, this means that the number of nodes and edges change in time. Various properties of coupled dynamical systems essentially depend on the structure of the interaction network, such as their robustness to noise. It is therefore of interest to predict how these properties are affected when the network grows and what is their relation to the growing mechanism. Here, we focus on the time-evolution of the network's Kirchhoff index. We derive closed form expressions for its variation in various scenarios including both the addition of edges and nodes. For the latter case, we investigate the evolution where a single node with one and two edges connecting to existing nodes are added recursively to a network. In both cases we derive relations between the properties of the nodes to which the new one connects, and the global evolution of the network robustness. In particular, we show how different scalings of the Kirchhoff index as a function of the number of nodes are obtained. We illustrate and confirm the theory with numerical simulations of growing random networks.
description: 11 pages, 5 figures
Algebraic solution of tropical best approximation problems
Creators: name: Krivulin, Nikolai
Publisher: name: arXiv
Year: 2023
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 15A80 (Primary), 90C24, 41A50, 41A65, 65D15 (Secondary)

description: We introduce new discrete best approximation problems, formulated and solved in the framework of tropical algebra, which deals with semirings and semifields with idempotent addition. Given a set of samples, each consisting of the input and output of an unknown function defined on an idempotent semifield, the problem is to find a best approximation of the function, by tropical Puiseux polynomial and rational functions. A new solution approach is proposed, which involves the reduction of the problem of polynomial approximation to the best approximate solution of a tropical linear vector equation with an unknown vector on one side (a one-sided equation). We derive a best approximate solution to the one-sided equation, and we evaluate the inherent approximation error in a direct analytical form. Furthermore, we reduce the rational approximation problem to the best approximate solution of an equation with unknown vectors on both sides (a two-sided equation). A best approximate solution to the two-sided equation is obtained in numerical form, by using an iterative alternating algorithm. To illustrate the new technique developed, we solve example approximation problems in terms of a real semifield, where addition is defined as maximum and multiplication as arithmetic addition (max-plus algebra), which corresponds to the best Chebyshev approximation by piecewise linear functions.
description: 19 pages, 4 figures
Cold gas stripping in satellite galaxies: from pairs to clusters
Creators: name: Brown, Toby
name: Catinella, Barbara
name: Cortese, Luca
name: Lagos, Claudia del P.
name: Dave, Romeel
name: Kilborn, Virginia
name: Haynes, Martha P.
name: Giovanelli, Riccardo
name: Rafieferantsoa, Mika
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In this paper we investigate environment driven gas depletion in satellite galaxies, taking full advantage of the atomic hydrogen (HI) spectral stacking technique to quantify the gas content for the entire gas-poor to -rich regime. We do so using a multi-wavelength sample of 10,600 satellite galaxies, selected according to stellar mass (log M$_{\star}$/M$_{\odot}$ $\geq$ 9) and redshift (0.02 $\leq$ z $\leq$ 0.05) from the Sloan Digital Sky Survey, with HI data from the Arecibo Legacy Fast ALFA (ALFALFA) survey. Using key HI-to-stellar mass scaling relations, we present evidence that the gas content of satellite galaxies is, to a significant extent, dependent on the environment in which a galaxy resides. For the first time, we demonstrate that systematic environmental suppression of gas content at both fixed stellar mass and fixed specific star formation rate (sSFR) in satellite galaxies begins in halo masses typical of the group regime (log M$_{h}$/M$_{\odot}$ < 13.5), well before galaxies reach the cluster environment. We also show that environment driven gas depletion is more closely associated to halo mass than local density. Our results are then compared with state-of-the-art semi-analytic models and hydrodynamical simulations and discussed within this framework, showing that more work is needed if models are to reproduce the observations. We conclude that the observed decrease of gas content in the group and cluster environments cannot be reproduced by starvation of the gas supply alone and invoke fast acting processes such as ram-pressure stripping of cold gas to explain this.
description: 17 pages, 8 figures, 1 table, MNRAS accepted. Minor revisions after review include addition of appendix on the effect of mergers on our result and clarification of small group environment
Educazione europea. Romanzo di Romain Gary
Creators: name: Renzi, Emilio
Publisher: name: Materiali di Estetica. Terza serie
Year: 2020

description: European education is a novel in which the Franco-Lithuanian writer Romain Gary (1914-1980) narrates the strenuous struggle of a handful of Polish partisans in Poland under the “Iron Heel” of the Wermacht, during the Second World War. Pages of tenderness among young people alternate with episodes of violence and cruelty, in a dry style. The aim of the partisans is the return to an education to the values on which Europe has grown freedom, rights, respect for persons, culture.
description: Materiali di Estetica. Terza serie, No 6.2 (2019): Anime europee
Optomechanics with a polarization non-degenerate cavity
Creators: name: Buters, F. M.
name: Weaver, M. J.
name: Eerkens, H. J.
name: Heeck, K.
name: de Man, S.
name: Bouwmeester, D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Experiments in the field of optomechanics do not yet fully exploit the photon polarization degree of freedom. Here experimental results for an optomechanical interaction in a polarization nondegenerate system are presented and schemes are proposed for how to use this interaction to perform accurate side-band thermometry and to create novel forms of photon-phonon entanglement. The experimental system utilizes the compressive force in the mirror attached to a mechanical resonator to create a micro-mirror with two radii of curvature which leads, when combined with a second mirror, to a significant polarization splitting of the cavity modes.
description: 5 pages, 4 figures
Introdução à Cosmologia Quântica
Creators: name: Delgado, Paola C. M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: This review presents an introduction to Quantum Cosmology, including the mathematical methods essential to the canonical approach, some of the existing conceptual problems and the connection of the models to possible observables.
description: 11 pages, in Portuguese, 3 figures, version accepted for publication in Cadernos de Astronomia
Energy Efficiency of Quantum Statevector Simulation at Scale
Creators: name: Adamski, Jakub
name: Richings, James Peter
name: Brown, Oliver Thomson
Publisher: name: arXiv
Year: 2023
Subjects: subject: Performance (cs.PF)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Quantum Physics (quant-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Classical simulations are essential for the development of quantum computing, and their exponential scaling can easily fill any modern supercomputer. In this paper we consider the performance and energy consumption of large Quantum Fourier Transform (QFT) simulations run on ARCHER2, the UK's National Supercomputing Service, with QuEST toolkit. We take into account CPU clock frequency and node memory size, and use cache-blocking to rearrange the circuit, which minimises communications. We find that using 2.00GHz instead of 2.25GHz can save as much as 25% of energy at 5% increase in runtime. Higher node memory also has the potential to be more efficient, and cost the user fewer CUs, but at higher runtime penalty. Finally, we present a cache-blocking QFT circuit, which halves the required communication. All our optimisations combined result in 40% faster simulations and 35% energy savings in 44 qubit simulations on 4,096 ARCHER2 nodes.
description: 5 pages, 5 figures. Accepted to Sustainable Supercomputing workshop at SC23
Vancouver ecomedia - No. 02
Creators: name: :Unav
Publisher: name: University of Victoria Libraries
Year: 2020
Subjects: subject: Dissenters
valueUri: http://id.worldcat.org/fast/895401
subject: Green movement
valueUri: http://id.worldcat.org/fast/947621
subject: Anarchism
valueUri: http://id.worldcat.org/fast/808387
subject: Anarchism--Periodicals
valueUri: http://id.worldcat.org/fast/808394
subject: Ecology
valueUri: http://id.worldcat.org/fast/901476
subject: FOS: Biological sciences
subject: Social movements
valueUri: http://id.worldcat.org/fast/1122657
subject: Anarchists
valueUri: http://id.worldcat.org/fast/808401
subject: Civil disobedience
valueUri: http://id.worldcat.org/fast/862481

description: A monthly anarchist publication from Vancouver, British Columbia. In this issue: Election deception -- Who will break this strike? -- Women outrage storm -- Trouble with Toigo -- Petrol politics -- Boys in blue kill man with blues -- Vote? No thanks.
Protein-protein docking by generalized Fourier transforms on 5D rotational manifolds
Creators: name: Padhorny, Dmitry
name: Kazennov, Andrey
name: Zerbe, Brandon S.
name: Porter, Kathryn
name: Xia, Bing
name: Mortadella, Scott E.
name: Kholodov, Yaroslav
name: Ritchie, David W.
name: Vajda, Sandor
name: Kozakov, Dima
Publisher: name: arXiv
Year: 2016
Subjects: subject: Biomolecules (q-bio.BM)
subject: FOS: Biological sciences

description: Energy evaluation using fast Fourier transforms enables sampling billions of putative complex structures and hence revolutionized rigid protein-protein docking. However, in current methods efficient acceleration is achieved only in either the translational or the rotational subspace. Developing an efficient and accurate docking method that expands FFT based sampling to 5 rotational coordinates is an extensively studied but still unsolved problem. The algorithm presented here retains the accuracy of earlier methods but yields at least tenfold speedup. The improvement is due to two innovations. First, the search space is treated as the product manifold $\mathbf{SO(3)x(SO(3)\setminus S^1)}$, where $\mathbf{SO(3)}$ is the rotation group representing the space of the rotating ligand, and $\mathbf{(SO(3)\setminus S^1)}$ is the space spanned by the two Euler angles that define the orientation of the vector from the center of the fixed receptor toward the center of the ligand. This representation enables the use of efficient FFT methods developed for $\mathbf{SO(3)}$. Second, we select the centers of highly populated clusters of docked structures, rather than the lowest energy conformations, as predictions of the complex, and hence there is no need for very high accuracy in energy evaluation. Therefore it is sufficient to use a limited number of spherical basis functions in the Fourier space, which increases the efficiency of sampling while retaining the accuracy of docking results. A major advantage of the method is that, in contrast to classical approaches, increasing the number of correlation function terms is computationally inexpensive, which enables using complex energy functions for scoring.
An evolutionary channel towards the accreting millisecond pulsar SAX J1808.4-3658
Creators: name: Chen, Wen-Cong
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Recent timing analysis reveals that the orbital period of the first discovered accreting millisecond pulsar SAX J1808.4-3658 is increasing at a rate $\dot{P}_{\rm orb}=(3.89\pm0.15)\times 10^{-12}~\rm s\,s^{-1}$, which is at least one order of magnitude higher than the value arising from the conservative mass transfer. An ejection of mass loss rate of $10^{-9}~\rm M_{\odot}{\rm yr}^{-1}$ from the donor star at the inner Lagrangian point during the quiescence state could interpret the observed orbital period derivative. However, it is unknown whether this source can offer such a high mass loss rate. In this work, we attempt to investigate an evolutionary channel towards SAX J1808.4-3658. Once the accretion disk becomes thermally and viscously unstable, the spin-down luminosity of the millisecond pulsar and the X-ray luminosity during outbursts are assumed to evaporate the donor star, and the resulting winds carry away the specific orbital angular momentum at the inner Lagrangian point. Our scenario could yield the observed orbital period, the orbital period derivative, the peak X-ray luminosity during outbursts. Low-mass X-ray binaries with a $1.0~\rm M_{\odot}$ donor star, and an orbital period in the range of 0.8 - 1.5 d, may be the progenitor of SAX J1808.4-3658. Our numerical calculations propose that the current donor star mass is $0.044 ~\rm M_{\odot}$, which is in approximately agreement with the minimum mass of the donor star. In addition, our scenario can also account for the formation of black widows or the diamond planet like PSR J1719-1438.
description: 7 pages, 5 figures, MNRAS in press
Numerical models of planetary nebulae with different episodes of mass ejection: the particular case of HuBi 1
Creators: name: Rodríguez-González, Ary
name: Peña, Miriam
name: Hernández-Martínez, Liliana
name: Ruiz-Escobedo, Francisco
name: Raga, Alejandro
name: Stasińska, Grazyna
name: Castorena, Jorge Ivan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We have studied the evolution of HuBi 1-like planetary nebulae, considering several stages of mass injection. We have carried out numerical ionization+1D hydrodynamics+atomic/ionic rate models with our code Coral 1D to reproduce planetary nebulae that present multiple shells produced by different ejection events around the ionizing source. Furthermore, we are interested in comparing numerical simulations with H$α$ and [NII]$λ$6584 emission structures and the position-velocity diagrams observed in HuBi 1. This object also has a phase where it has drastically decreased the injection of ionized photons ejected from the source. The result of these different stages of ejection is a nebula with intense [NII] line emission in the inner part of the planetary nebula and an extended HII recombination line emission around the central zone. The model for HuBi 1 shows the capability of our code to explain the hydrodynamical and photoionization evolution in ionization nebulae. This is our first step with a 1D code to study these two physical phenomena at the same time.
description: accepted
On the influence of the intermolecular potential on the wetting properties of water on silica surfaces
Creators: name: Pafong, E.
name: Geske, J.
name: Drossel, B.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study the wetting properties of water on silica surfaces using molecular dynamics (MD) simulations. To describe the intermolecular interaction between water and silica atoms, two types of interaction potential models are used: the standard Bródka and Zerda (BZ) model, and the Gulmen and Thompson (GT) model. We perform an in-depth analysis of the influence of the choice of the potential on the arrangement of the water molecules in partially filled pores and on top of silica slabs. We find that at moderate pore filling ratios, the GT silica surface is completely wetted by water molecules, which agrees well with experimental findings, while the commonly used BZ surface is less hydrophilic and is only partially wetted. We interpret our simulation results using an analytical calculation of the phase diagram of water in partially filled pores. Moreover, an evaluation of the contact angle of the water droplet on top of the silica slab reveals that the interaction becomes more hydrophilic with increasing slab thickness and saturates around 2.5-3 nm, in agreement with the experimentally found value. Our analysis also shows that the hydroaffinity of the surface is mainly determined by the electrostatic interaction, but that the van der Waals interaction nevertheless is strong enough that it can turn a hydrophobic surface into a hydrophilic surface.
description: Article: 9 pages, 7 Figures. There is also a supplementary information file: 2 pages, 3 Figures
Two-Photon-Exchange Effects and $Δ(1232)$ Deformation
Creators: name: Zhou, Hai-Qing
name: Yang, Shin Nan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The two-photon-exchange (TPE) contribution in $ep\rightarrow epπ^0$ with $W=M_Δ$ and small $Q^2$ is calculated and its corrections to the ratios of electromagnetic transition form factors $R_{EM} = E_{1+}^{(3/2)}/M_{1+}^{(3/2)} $ and $R_{SM} = S_{1+}^{(3/2)}/M_{1+}^{(3/2)}$, are analysed. A simple hadronic model is used to estimate the TPE amplitude. Two phenomenological models, MAID2007 and SAID, are used to approximate the full $ep\rightarrow epπ^0$ cross sections which contain both the TPE and the one-photon-exchange (OPE) contributions. The genuine the OPE amplitude is then extracted from an integral equation by iteration. We find that the TPE contribution is not sensitive to whether MAID or SAID is used as input in the region with $Q^2<2$ GeV$^2$. It gives small correction to $R_{EM}$ while for $R_{SM}$, the correction is about -10\% at small $ε$ and about $1\%$ at large $ε$ for $Q^2\approx2.5$ GeV$^2$. The large correction from TPE at small $ε$ must be included in the analysis to get a reliable extraction of $R_{SM}$.
description: Talk given at Conference:C16-07-25
Violin in action
Creators: name: Mirkovic, Kristina
Publisher: name: Materiali di Estetica. Terza serie
Year: 2020

description: Nella Scuola di Milano è sempre stata viva l’attenzione per la musica: basti pensare al lavoro Luigi Rognoni e, in tempi a noi più vicini più, agli originali studi di musicologia fenomenologica di Giovanni Piana. Antonio Banfi (che accanto a Piero Martinetti della Scuola di Milano è il capostipite) ha dedicato appunti squisitamente fenomenologici, e tuttora stimolanti, al problema dell’esecuzione musicale; tema che è visto nella sua complessità, e nei molteplici momenti tra loro relazionati che lo compongono. Tra questi fondamentale è il rapporto con la partitura, con la “materialità” sonora, con lo strumento, e con l’insegnamento di esso, cui il testo di Kristina Mirkovic qui presentato è dedicato. Problemi estetico-teorici sono evidenti nell’intreccio tra razionalismo e pragmatismo sullo sfondo delle teorie didattiche considerate, nel rapporto tra tradizione orale e musica scritta nell’insegnamento; sullo sfondo sta appunto il problema della partitura. Violin in action, pubblicato dalla "Dantone Edizioni e Musica - Distribuzione Volontè & Co” è un eccezionale esempio della interazione multidisciplinare fra studi filosofici, perfezionamento strumentale e carriera concertistica. Per un suo inquadramento lasciamo a Kristina Mirkovic la parola. [G. S.]
description: Materiali di Estetica. Terza serie, No 6.2 (2019): Anime europee
Vancouver ecomedia - No. 05
Creators: name: :Unav
Publisher: name: University of Victoria Libraries
Year: 2020
Subjects: subject: Ecology
valueUri: http://id.worldcat.org/fast/901476
subject: FOS: Biological sciences
subject: Dissenters
valueUri: http://id.worldcat.org/fast/895401
subject: Anarchists
valueUri: http://id.worldcat.org/fast/808401
subject: Social movements
valueUri: http://id.worldcat.org/fast/1122657
subject: Anarchism--Periodicals
valueUri: http://id.worldcat.org/fast/808394
subject: Green movement
valueUri: http://id.worldcat.org/fast/947621
subject: Anarchism
valueUri: http://id.worldcat.org/fast/808387
subject: Civil disobedience
valueUri: http://id.worldcat.org/fast/862481

description: A monthly anarchist publication from Vancouver, British Columbia. In this issue: Yippie scum!: spreading like fungus -- Infiltrators exposed! -- Spain general strike: anarchist militants arrested at gunpoint -- Shell lies, people die -- RARA suspect released -- The entrapment of Fran Trutt -- In the navy -- It's a mans job -- Burn it down!
Polarization engineering of entangled photons from a lithium niobate nonlinear metasurface
Creators: name: Ma, Jinyong
name: Zhang, Jihua
name: Jiang, Yuxin
name: Fan, Tongmiao
name: Parry, Matthew
name: Neshev, Dragomir N.
name: Sukhorukov, Andrey A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Complex polarization states of photon pairs are indispensable in various quantum technologies. Conventional methods for preparing desired two-photon polarization states are realized through bulky nonlinear crystals, which can restrict the versatility and tunability of the generated quantum states due to the fixed crystal nonlinear susceptibility. Here we present a solution using a nonlinear metasurface incorporating multiplexed silica metagratings on a lithium niobate film of 300 nanometer thickness. We fabricate two orthogonal metagratings on a single substrate with an identical resonant wavelength, thereby enabling the spectral indistinguishability of the emitted photons, and demonstrate in experiments that the two-photon polarization states can be shaped by the metagrating orientation. Leveraging this essential property, we formulate a theoretical approach for generating arbitrary polarization-entangled qutrit states by combining three metagratings on a single metasurface, allowing the encoding of desired quantum states or information. Our findings enable miniaturized optically controlled quantum devices using ultrathin metasurfaces as polarization-entangled photon sources.
description: 21 pages, 5 figures, journal paper
Carbon cluster diagnostics-I: Direct Recoil Spectroscopy (DRS) of Ar+ and Kr+ bombarded graphite
Creators: name: Ahmad, Shoaib
name: Akhtar, M. N.
name: Qayyum, A.
name: Ahmad, B.
name: Bahar, K.
name: Arshed, W.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Measurements of the energy spectra of multiply charged positive and negative carbon ions recoiling from graphite surface under 100 and 150 keV argon and krypton ion bombardment are presented. With the energy spectrometer set at recoil angle of 79.5 degrees, direct recoil (DR) peaks have been observed with singly as well as multiply charged carbon ions , where n = 1 to 6. These monatomic and cluster ions have been observed recoiling with the characteristic recoil energy E(DR) . We have observed sharp DR peaks. A collimated projectile beam with small divergence is supplemented with a similar collimation before the energy analyzer to reduce the background of sputtered ions due to scattered projectiles.
description: 9 pages, 5 figures, 2 tables